Home Physical-chemical properties studying of molecular structures via topological index calculating
Article Open Access

Physical-chemical properties studying of molecular structures via topological index calculating

  • Jianzhang Wu EMAIL logo , Mohammad Reza Farahani , Xiao Yu and Wei Gao
Published/Copyright: May 5, 2017

Abstract

It’s revealed from the earlier researches that many physical-chemical properties depend heavily on the structure of corresponding moleculars. This fact provides us an approach to measure the physical-chemical characteristics of substances and materials. In our article, we report the eccentricity related indices of certain important molecular structures from mathematical standpoint. The eccentricity version indices of nanostar dendrimers are determined and the reverse eccentric connectivity index for V-phenylenic nanotorus is discussed. The conclusions we obtained mainly use the trick of distance computation and mathematical derivation, and the results can be applied in physics engineering.

PACS: 02.10.0x

1 Introduction

Many experiments reveal the evidence that the physical-chemical properties of pounds and materials are closely related to their molecular structures. For example, the structure-dependency of total π-electron energy Eπ heavily relies on the sum of squares of the vertex degrees of the molecular graph. Topological indices, as a result, are introduced as numerical parameters of molecular structures, and they play a key role in realizing the physical-chemical properties of substances.

In theoretical computational model, a molecular structure can be represented as a molecular graph G in which each vertex is expressed as an atom and each bound between atoms is denoted as an edge. Then, a topological index can be regarded as a score operator f : G → ℝ+ which maps each molecular graph to a positive real number.

In the past four decades, scientists introduced many indices from the application perspective, such as Zagreb index, Wiener index, sum connectivity index and harmonic index which reflect certain physical-chemical characteristics of molecular structure. There were many contributions to report these distance-based or degree-based indices of special molecular structures (See Farahani et al. [1], Jamil et al. [2], Gao and Wang [3], Gao et al. [47] and Gao and Wang [8, 9] for more details). The notations and terminologies that were used (but undefined in our paper) can be found in Bondy and Murty [10].

For a fixed vertex uV(G), the eccentricity ec(u) of vertex u is defined as the largest distance between u and any other vertex v in G. There are several eccentricity related indices introduced for the engineering purpose.

The first atom-bond connectivity index (in short, ABC index) is introduced by Estrada et al. [11] as

ABC(G)=uvE(G)d(u)+d(v)2d(u)d(v),

where d(v) is the degree of vertex v in the molecular graph G. Correspondingly, the fifth atom bond connectivity index is denoted as

ABC5(G)=uvE(G)ec(u)+ec(v)2ec(u)ec(v).

The first geometric-arithmetic index (shortly, GA index) rased by Vukić ević and Furtula [12] as

GA(G)=uvE(G)2d(u)d(v)d(u)+d(v).

Several results on GA index can refer to Zhou et al. [13], Rodríguez and Sigarreta [14], [15] and [16], Husin et al. [17], Bahrami and Alaeiyan [18], Sigarreta [19], Divnic et al. [20], Das et al. [21], Mahmiani et al. [22], Fath-Tabar et al. [23] and [24], Das et al. [25], Gutman and Furtula [26], Furtula and Gutman [27], and Shabani et al. [28]. The fourth geometric-arithmetic index is defined by Lee et al. [29] which is stated as

GA4(G)=uvE(G)2ec(u)ec(v)ec(u)+ec(v).

Moreover, the first and the second multiplicative eccentricity index are defined as

Π1(G)=ΠuvE(G)(ec(u)+ec(v))

and

Π2(G)=ΠuvE(G)(ec(u)ec(v)),

respectively. And, the fourth and sixth Zagreb polynomials are denoted as

Zg4(G,x)=uvE(G)xec(u)+ec(v)

and

Zg6(G,x)=uvE(G)xec(u)ec(v),

respectively.

As an important index, the eccentric connectivity index (ECI) of molecular graph G is introduced as

ξc(G)=vV(G)ec(v)d(v).

Ranjini and Lokesha [30] determined the eccentric connectivity index of the subdivision graph of tadpole graphs, complete graphs and wheel graphs. Morgan et al. [31] yielded the sharp lower bound on ξc(G) for a given graph order. Furthermore, the tight upper and lower bounds are manifested for trees with given vertex number and diameter. Hua and Das [32] presented the relationship between the eccentric connectivity index and Zagreb indices. De [33] deduced the eccentric connectivity index and polynomial of the thorn graphs. Eskender and Vumar [34] studied the eccentric distance sum and eccentric connectivity index of generalized hierarchical product graphs. In addition, the eccentric connectivity index of F-sum graphs by virtue of certain invariants of the factors are presented as well. Ilić and Gutman [35] proposed that the broom reaches the maximum ξc(G) among trees with fixed maximum vertex degree, and the trees with minimum ξc(G) are also characterized. Iranmanesh and Hafezieh [36] computed the eccentric connectivity index of some special graph families. Dankelmann et al. [37] raised the sharp upper bound for eccentric connectivity index and presented the molecular graphs which asymptotically attain this bound. Morgan et al. [38] presented the tight lower bound of eccentric connectivity index for a tree with given order and diameter. Rao and Lakshmi [39] determined the eccentric connectivity index of phenylenic nanotubes.

Ediz [40] introduced a new distance-based topological index called reverse eccentric connectivity index which is stated as

REξc(G)=vV(G)ec(v)S(v),

where S(v)=uN(v)d(u). Nejati and Mehdi [41] obtained the reverse eccentric connectivity index of tetragonal carbon nanocones.

Although there have been several contributions in distance-based and degree-based indices of molecular structures, the study of eccentricity related indices for certain special compounds is still largely limited. On the other hand, as critical and widespread molecular structures, nanostar dendrimers and V-phenylenic nanotorus are widely used in physics, chemistry, biology, medical and material science. For these reasons, we study the exact expressions of eccentricity related indices for nanostar dendrimers and V-phenylenic nanotorus.

2 Main Results and Proofs

In this paper, we mainly study the eccentricity related indices for nanostar dendrimers (Subsection 2.1) and the reverse eccentric connectivity index of V-phenylenic nanotorus (Subsection 2.2).

2.1 Eccentricity related index of nanostar dendrimers

D1[n] is the first class of nanostar dendrimer family in which |V(D1[n])| = 36n – 12 and |E(D1[n])| = 42n – 15, and D2[n] is the second class of nanostar dendrimer family in which |V(D2[n])| = 120 · 2n – 108 and |E(D2[n])| = 140 · 2n – 127. The example of basic structure of D1[n] and D2[n] can refer to Figure 1 and Figure 2, respectively.

Figure 1 D1[1] and D1[2]
Figure 1

D1[1] and D1[2]

Figure 2 D2[1] and D2[2]
Figure 2

D2[1] and D2[2]

Theorem 1

For n = 1, we have

GA4(D1[1])=184213+241415+72217+361019,ABC5(D1[1])=91142+31314+152+21710,Π1(D1[1])=139156176196,Π2(D1[1])=429566726906,Zg4(D1[1],x)=9x13+6x15+6x17+6x19,Zg6(D1[1],x)=9x42+6x56+6x72+6x90.

For n ≥ 2, we get

GA4(D1[n])=18(3n+3)(3n+4)6n+7+i=1n(32i+1(3n+3i+1)(3n+3i+2)6n+6i+3+32i+1(3n+3i+2)(3n+3i+3)6n+6i+5+32i+1(3n+3i+3)(3n+3i+4)6n+6i+7)+i=1n132i+1(3n+3i+3)(3n+3i+4)6n+6i+7,
ABC5(D1[n])=96n+5(3n+3)(3n+4)+i=1n(32i6n+6i+1(3n+3i+1)(3n+3i+2)+32i6n+6i+3(3n+3i+2)(3n+3i+3)+32i6n+6i+5(3n+3i+3)(3n+3i+4))+i=1n132i6n+6i+5(3n+3i+3)(3n+3i+4),
Π1(D1[n])=(6n+7)9i=1n((6n+6i+3)32i(6n+6i+5)32i(6n+6i+7)32i)i=1n1(6n+6i+7)32i,
Π2(D1[n])=((3n+3)(3n+4))9i=1n(((3n+3i+1)(3n+3i+2))32i((3n+3i+2)(3n+3i+3))32i((3n+3i+3)(3n+3i+4))32i)i=1n1((3n+3i+3)(3n+3i+4))32i,
Zg4(D1[n],x)=96n+7+i=1n((32i)6n+6i+3+(32i)6n+6i+5+(32i)6n+6i+7)+i=1n1(32i)6n+6i+7,
Zg6(D1[n],x)=9(3n+3)(3n+4)+i=1n((32i)(3n+3i+1)(3n+3i+2)+(32i)(3n+3i+2)(3n+3i+3)+(32i)(3n+3i+3)(3n+3i+4)+i=1n1(32i)(3n+3i+3)(3n+3i+4.

Proof

Since D1[n] is symmetrical, we can mark the vertices some representative symbols which are showed in Figure 1. Next, we only present the detailed proof of GA4 index, and other parts of result can be obtained in the similar way.

By the analysis of molecular structure, the edge set of D1[n] can be divided into six subsets which are described as follows:

  • (u, v): with eccentricities 3n+4 and 3n+3, and there are six edges in this class;

  • (a1, v): with eccentricities 3n + 4 and 3n + 3, and there are three edges in this class;

  • (ai, bi): with eccentricities 3n + 3i+1 and 3n+3i+2, and there are 3 · 2i edges in i-th generation of this class;

  • (bi, ci): with eccentricities 3n+3i+2 and 3n+3i+3, and there are 3 · 2i edges in i-th generation of this class;

  • (ci, di) : with eccentricities 3n+3i+3 and 3n+3i+4, and there are 3 · 2i edges in i-th generation of this class;

  • (ci, ai+1): with eccentricities 3n+3i+3 and 3n+3i+4, and there are 3 · 2i edges in i-th generation of this class.

Thus, by the definition of the fourth GA index, we infer

GA4(D1[1])=uvE(D1[1])2ec(u)ec(v)ec(u)+ec(v)=62767+6+32767+6+62787+8+62989+8+629109+10=184213+241415+72217+361019,

and for n ≥ 2

GA4(D1[n])=uvE(D1[n])2ec(u)ec(v)ec(u)+ec(v)=62(3n+3)(3n+4)(3n+3)+(3n+4)+32(3n+3)(3n+4)(3n+3)+(3n+4)+i=1n(32i2(3n+3i+1)(3n+3i+2)(3n+3i+1)+(3n+3i+2)+32i2(3n+3i+2)(3n+3i+3)(3n+3i+2)+(3n+3i+3)+32i2(3n+3i+3)(3n+3i+4)(3n+3i+3)+(3n+3i+4))+i=1n132i2(3n+3i+3)(3n+3i+4)(3n+3i+3)+(3n+3i+4)=18(3n+3)(3n+4)6n+7+i=1n(32i2(3n+3i+1)(3n+3i+2)6n+6i+3+32i2(3n+3i+2)(3n+3i+3)6n+6i+5+32i2(3n+3i+3)(3n+3i+4)6n+6i+7)+i=1n132i2(3n+3i+3)(3n+3i+4)6n+6i+7.

Therefore, we get the expected result.  □

Theorem 2

For n = 1, we have

GA4(D2[1])=4+161415+24217+241019+811021+163323+323925,
ABC5(D2[1]=473+81314+13152+431710+419110+2711+226+42339,
Π1(D2[1])=142154172194214234242258,Π2(D2[1])=4925647229041104132414421568,
Zg4(D2[1],x)=2x14+4x15+2x17+4x19+4x21+4x23+2x24+8x25,
Zg6(D2[1],x)=2x49+4x56+2x72+4x90+4x110+4x132+2x144+8x156.

For n ≥ 2, we get

GA4(D2[n])=uvE(D2[n])2ec(u)ec(v)ec(u)+ec(v)=2+8(10n3)(10n2)20n5+4(10n1)(10n2)20n3+i=1n(2i+2(10n+10i10)(10n+10i11)20n20i21+2i+2(10n+10i10)(10n+10i9)20n20i19+2i+2(10n+10i8)(10n+10i9)20n20i17+(2i+22n+2+2n+3)(10n+10i8)(10n+10i7)20n20i15+2i)+i=1n(2i+3(10n+10i5)(10n+10i6)20n20i11+2i+3(10n+10i5)(10n+10i4)20n20i9+2i+3(10n+10i3)(10n+10i4)20n20i7+2i+3(10n+10i3)(10n+10i2)20n20i5+2i+2(10n+10i7)(10n+10i6)20n20i13+2i+2(10n+10i1)(10n+10i2)20n20i3.
ABC5(D2[n])=210n320n8+420n7(10n3)(10n2)+220n5(10n1)(10n2)+i=1n(2i+120n+20i23(10n+10i10)(10n+10i11)+2i+120n+20i21(10n+10i10)(10n+10i9)+2i+120n+20i19(10n+10i8)(10n+10i9)+(2i+12n+12n+2)20n+20i17(10n+10i8)(10n+10i7)+2i10n+10i820n+20i18)+i=1n(2i+120n+20i13(10n+10i5)(10n+10i6)+2i+120n+20i11(10n+10i5)(10n+10i4)+2i+220n+20i9(10n+10i3)(10n+10i4)+2i+220n+20i7(10n+10i3)(10n+10i2)+2i+120n+20i15(10n+10i7)(10n+10i6)+2i+120n+20i5(10n+10i1)(10n+10i2)),
Π1(D2[n])=(20n6)2(20n5)4(20n3)2i=1n((20n+20i21)2i+1(20n+20i19)2i+1(20n+20i17)2i+1(20n+20i15)(2i+12n+12n+2)(20n+20i16)2i+1)i=1n((20n+20i11)2i+2(20n+20i9)2i+2(20n+20i7)2i+2(20n+20i5)2i+2(20n+20i13)2i+1(20n+20i3)2i+1),
Π2(D2[n])=(10n3)4((10n3)(10n2))4((10n1)(10n2))2i=1n(((10n+10i10)(10n+10i11))2i((10n+10i10)(10n+10i9))2i((10n+10i8)(10n+10i9))2i+1((10n+10i8)(10n+10i7))(2i+12n+12n+2)(10n+10i8)2i+1)i=1n(((10n+10i5)(10n+10i6))2i+2((10n+10i5)(10n+10i4))2i+2((10n+10i3)(10n+10i4))2i+2((10n+10i3)(10n+10i2))2i+2((10n+10i7)(10n+10i6))2i+1((10n+10i1)(10n+10i2))2i+1),
Zg4(D2[n],x)=2x20n6+4x20n5+2x20n3+i=1n(2i+1x20n+20i21+2i+1x20n+20i19+2i+1x20n+20i17+(2i+12n+12n+2)x20n+20i15+2i+1x20n+20i16+i=1n(2i+2x20n+20i11+2i+2x20n+20i9+2i+2x20n+20i7+2i+2x20n+20i5+2i+1x20n+20i13+2i+1x20n+20i3),
Zg6(D2[n],x)=2x(10n3)2+4x(10n3)(10n2)+2x(10n1)(10n2)+i=1n(2i+1x(10n+10i10)(10n+10i11)+2i+1x(10n+10i10)(10n+10i9)+2i+1x(10n+10i8)(10n+10i9)+(2i+12n+12n+2)x(10n+10i8)(10n+10i7)+2i+1x(10n+10i8)(10n+10i8)+i=1n(2i+2x(10n+10i5)(10n+10i6)+2i+2x(10n+10i5)(10n+10i4)+2i+2x(10n+10i3)(10n+10i4)+2i+2x(10n+10i3)(10n+10i2)+2i+1x(10n+10i7)(10n+10i6)+2i+1x(10n+10i1)(10n+10i2)).

Proof

Since D2[n] is also symmetrical, we can mark the vertices some representative symbols which are showed in Figure 2. We only present the detailed proof of GA4 index, and other parts of result can be obtained in the similar way.

By the analysis of molecular structure, the edge set of D2[n] can be divided into 17 subsets which are described as follows:

  • (u, v):with eccentricities 10n – 3 and 10n – 3, and there are two edges in this class;

  • (v, w): with eccentricities 10n – 3 and 10n – 2, and there are four edges in this class;

  • (w, b1):with eccentricities 10n – 2 and 10n – 1, and there are two edges in this class;

  • (ai, bi): with eccentricities 10n+10i–10 and 10n + 10i– 11, and there are 2i edges in i-th generation of this class;

  • (bi, ci): with eccentricities 10n + 10i–11 and 10n +10i– 10, and there are 2i edges in i-th generation of this class;

  • (ci, di): with eccentricities 10n+10i–10 and 10n+10i–9, and there are 2i+1 edges in i-th generation of this class;

  • (di, ei): with eccentricities 10n+10i–9 and 10n+10i–8, and there are 2i+1 edges in i-th generation of this class;

  • (ei, fi): with eccentricities 10n+10i–8 and 10n+10i–7, and there are 2i+1 edges in i-th (in)generation of this class;

  • (en, fn): with eccentricities 10n+10i–8 and 10n+10i–7, and there are 2n+2 edges in this class;

  • (ei, gi): with eccentricities 10n+10i–8 and 10n +10i–8, and there are 2i edges in i-th generation of this class;

  • (ai′, bi′):with eccentricities 10n+10i–5 and 10n+10i– 6, and there are 2i+1 edges in i-th (1 ≤ in –1 and n ≥ 2) generation of this class;

  • (bi′, ci′): with eccentricities 10n+10i–6 and 10n+10i–5, and there are 2i+1 edges in i-th (1 ≤ in –1 and n ≥ 2) generation of this class;

  • (ci′, di′): with eccentricities 10n+10i–5 and 10n+10i–4, and there are 2i+2 edges in i-th (1 ≤ in –1 and n ≥ 2) generation of this class;

  • (di′, ei′): with eccentricities 10n +10i–4 and 10n + 10i– 3, and there are 2i+2 edges in i-th (1 ≤ in – 1 and n ≥ 2) generation of this class;

  • (ei′, fi′): with eccentricities 10n+10i–3 and 10n+10i–2, and there are 2i+2 edges in i-th (1 ≤ in – 1 and n ≥ 2) generation of this class;

  • (fi, bi′):with eccentricities 10n+10i–7 and 10n+10i–6, and there are 2i+1 edges in i-th (1 ≤ in –1 and n ≥ 2) generation of this class;

  • (fi′, bi+1): with eccentricities 10n + 10i–2 and 10n+ 10i – 1, and there are 2i+1 edges in i-th (1 ≤ in – 1 and n ≥ 2) generation of this class.

Thus, in view of the definition of the fourth GA index, we have

GA4(D2[1])=uvE(D2[1])2ec(u)ec(v)ec(u)+ec(v)=4+42787+8+22989+8+429109+10+42111011+10+42111211+12+82131213+12=4+161415+24217+241019+811021+163323+323925,

and for n ≥ 2

GA4(D2[n])=uvE(D2[n])2ec(u)ec(v)ec(u)+ec(v)=2+8(10n3)(10n2)20n5+4(10n1)(10n2)20n3+i=1n(2i+2(10n+10i10)(10n+10i11)20n20i21+2i+2(10n+10i10)(10n+10i9)20n20i19+2i+2(10n+10i8)(10n+10i9)20n20i17+(2i+22n+2+2n+3)(10n+10i8)(10n+10i7)20n20i15+2i)+i=1n(2i+3(10n+10i5)(10n+10i6)20n20i11+2i+3(10n+10i5)(10n+10i4)20n20i9+2i+3(10n+10i3)(10n+10i4)20n20i7+2i+3(10n+10i3)(10n+10i2)20n20i5+2i+2(10n+10i7)(10n+10i6)20n20i13+2i+2(10n+10i1)(10n+10i2)20n20i3.

Thus, we yield the expected result.  □

2.2 Reverse eccentric connectivity index for V-phenylenic nanotorus

In this subsection, we consider the V-phenylenic nanotorus TO[p, q] (here p is the number of hexagons in each row and q is the number of hexagons in each column) which is a widely used nano structure. For the example of TO[4, 5], please refer to Figure 3.

Figure 3 V-phenylenic nanotorus TO[4, 5]
Figure 3

V-phenylenic nanotorus TO[4, 5]

By the molecular structure analysis, we check that |V(TO[p, q])| = 6pq and |E(TO[p, q])| = 9pq. Furthermore, TO[p, q] is a cubic such that d(v) = 3 for any vV(G) and ec(v) = ec(u) for any two vertices u and v.

Now, we present the main result of this part.

Theorem 3

The reverse eccentric connectivity index for V-phenylenic nanotorus is sated as follows:

  1. If p ≡ 0(mod2), then

    REξc(TO[p,q])=(4q+p)pq3,ifqp(3p+2q)pq3,ifqp,
  2. If p ≡ 1(mod2), then

    REξc(TO[p,q])=(4q+p1)pq3,ifqp(3p+2q1)pq3,ifqp,

Proof

Since TO[p, q] is a cubic, we have S(v) = 9 for any vV(G).

The whole proof process can be divided into four parts.

  1. p ≡ 0(mod2) and q ≡ 0(mod2).

    • If qp, then ec(v)=4q+p2 for any vV(G).

      Then

      REξc(TO[p,q])=(4q+p)pq3.
    • If qp, then ec(v)=3p+2q2 for any vV(G).

      Then

      REξc(TO[p,q])=(3p+2q)pq3.

  2. p ≡ 1(mod2) and q ≡ 1(mod2).

    • If qp, then ec(v)=4q+p12 for any vV(G).

      Then

      REξc(TO[p,q])=(4q+p1)pq3.
    • If qp, then ec(v)=3p+2q12 for any vV(G).

      Then

      REξc(TO[p,q])=(3p+2q1)pq3.

  3. p ≡ 0(mod2) and q ≡ 1(mod2).

    • If qp, then ec(v)=4q+p2 for any vV(G).

      Then

      REξc(TO[p,q])=(4q+p)pq3.
    • If qp, then ec(v)=3p+2q2 for any vV(G).

      Then

      REξc(TO[p,q])=(3p+2q)pq3.

  4. p ≡ 1(mod2) and q ≡ 0(mod2).

    • If qp, then ec(v)=4q+p12 for any vV(G).

      Then

      REξc(TO[p,q])=(4q+p1)pq3.
    • If qp, then ec(v)=3p+2q12 for any vV(G).

      Then

      REξc(TO[p,q])=(3p+2q1)pq3.

Hence, we get the desired conclusion.  □

3 Conclusion

In this paper, we mainly report the eccentricity related indices for nanostar dendrimers and the reverse eccentric connectivity index of V-phenylenic nanotorus. Since these indices are widely used in the analysis of physical-chemical properties, they possess a promising prospect of application in physical, chemical, medical and material engineering.

Acknowledgement

The authors thank the reviewers for their constructive comments in improving the quality of this paper. This work was supported in part by the National Natural Science Foundation of China [grant number 60903131]; Science and Technology of Jiangsu Province [grant number BE2011173]; and Key Laboratory of Computer Network and Information Integration Founding in Southeast University.

  1. Conflicts of interest: The authors declare that there is no conflict of interests regarding the publication of this paper.

References

[1] Farahani M.R., Jamil M.K., Imran M., Vertex PIv topological index of titania carbon nanotubes TiO2(m, n), Appl. Math. Nonl. Sc., 2016, 1, 175-182.10.21042/AMNS.2016.1.00013Search in Google Scholar

[2] Jamil M.K., Farahani M.R., Imran M., Malik M.A., Computing eccentric version of second Zagreb index of polycyclic aromatic hydrocarbons (PAHk), Appl. Math. Nonl. Sc., 2016, 1, 247-252.10.21042/AMNS.2016.1.00019Search in Google Scholar

[3] Gao W., Wang W.F., The eccentric connectivity polynomial of two classes of nanotubes, Chaos, Soliton. Fract., 2016, 89, 290-294.10.1016/j.chaos.2015.11.035Search in Google Scholar

[4] Gao W., Wang W.F., Farahani M.R., Topological indices study of molecular structure in anticancer drugs, J. Chem., 2016, http://dx.doi.org/10.1155/2016/3216327.10.1155/2016/3216327Search in Google Scholar

[5] Gao W., Farahani M.R., Shi L., Forgotten topological index of some drug structures, Acta Medica Mediterr., 2016, 32, 579-585.10.1155/2016/1053183Search in Google Scholar

[6] Gao W., Wang W.F., The fifth geometric arithmetic index of bridge graph and carbon nanocones, J. Differ. Equ. Appl., 2017, http://dx.doi.org/10.1080/10236198.2016.1197214.10.1080/10236198.2016.1197214Search in Google Scholar

[7] Gao W., Wang W.F., Jamil M.K., Farahani M.R., Electron energy studying of molecular structures via forgotten topological index computation, J. Chem., 2016, http://dx.doi.org/10.1155/2016/1053183.10.1155/2016/1053183Search in Google Scholar

[8] Gao W., Wang W.F., Second atom-bond connectivity index of special chemical molecular structures, J. Chem., 2014, http://dx.doi.org/10.1155/2014/906254.10.1155/2014/906254Search in Google Scholar

[9] Gao W., Wang W.F., The vertex version of weighted wiener number for bicyclic molecular structures, Computational and Mathematical Methods in Medicine, 2015, http://dx.doi.org/10.1155/2015/418106.10.1155/2015/418106Search in Google Scholar PubMed PubMed Central

[10] Bondy J.A., Murty U.S.R., Graph theory, Spring Press, Berlin, 2008.10.1007/978-1-84628-970-5Search in Google Scholar

[11] Estrada E., Torres L., Rodrí guez L., Gutman I., An atombond connectivity index: modelling the enthalpy of formation of alkanes, Indian J. Chem. A, 1998, 37, 849-855.Search in Google Scholar

[12] Vukić ević D., Furtula B., Topological index based on the ratios of geometrical and arithmetical means of end-vertex degrees of edges, J. Math. Chem., 2009, 46, 1369-1376.10.1007/s10910-009-9520-xSearch in Google Scholar

[13] Zhou B., Gutman I., Furtulab B., Dua Z.B., On two types of geometric-rithmetic index, Chem. Phys. Lett., 2009, 482, 153-155.10.1016/j.cplett.2009.09.102Search in Google Scholar

[14] Rodrí guez J.M., Sigarreta J.M., On the geometric-rithmetic index, MATCH Commun. Math. Comput. Chem., 2015, 74, 103-120.Search in Google Scholar

[15] Rodrí guez J.M., Sigarreta J.M., Spectral properties of geometric-arithmetic index, Appl. Math. Comput., 2016, 277, 142-153.10.1016/j.amc.2015.12.046Search in Google Scholar

[16] Rodrí guez J.M., Sigarreta J.M., Spectral study of the geometric-arithmetic index, MATCH Commun. Math. Comput. Chem., 2015, 74, 121-135.Search in Google Scholar

[17] Husin M.N., Hasni R., Imran M., Kamarulhaili H., The edge version of geometric arithmetic index of nanotubes and nanotori, Optoelectron. Adv. Mat., 2015, 9, 1292-1300.Search in Google Scholar

[18] Bahrami A., Alaeiyan M., Fifth geometric-arithmetic index of H-naphtalenic nanosheet [4n, 2m], J. Comput. Theor. Nanos., 2015, 12, 689-690.10.1166/jctn.2015.4145Search in Google Scholar

[19] Sigarreta J.M., Bounds for the geometric-arithmetic index of a graph, Miskolc Math. Notes, 2015, 16, 1199-1212.10.18514/MMN.2015.1423Search in Google Scholar

[20] Divnic T., Milivojevic M., Pavlovic L., Extremal graphs for the geometric-arithmetic index with given minimum degree, Discrete Appl. Math., 2014, 162, 386-390.10.1016/j.dam.2013.08.001Search in Google Scholar

[21] Das, K.C., Trinajstic N., Comparison between geometric-arithmetic indices, Croat. Chem. Acta, 2012, 85, 353-357.10.5562/cca2005Search in Google Scholar

[22] Mahmiani A., Khormali O., Iranmanesh A., On the edge version of geometric-arithmetic index, Dig. J. Nanomater. Bios., 2012, 7, 411-414.Search in Google Scholar

[23] Fath-Tabar G.H., Hossein-Zadeh S., Hamzeh A., On the first geometric-arithmetic index of product graphs, Utliltas Mathematica, 2011, 86, 279-287.Search in Google Scholar

[24] Fath-Tabar G., Furtula B., Gutman I., A new geometric-arithmetic index, J. Math. Chem., 2010, 47, 477-486.10.1007/s10910-009-9584-7Search in Google Scholar

[25] Das K.Ch., Gutman I., Furtula B., On the first geometric-arithmetic index of graphs, Discrete Appl. Math., 2011, 159, 2030-2037.10.1016/j.dam.2011.06.020Search in Google Scholar

[26] Gutman I., Furtula B., Estimating the second and third geometric-arithmetic indices, Hacet. J. Math. Stat., 2011, 40, 69-76.Search in Google Scholar

[27] Furtula B., Gutman I., Relation between second and third geometric-arithmetic indices of trees, J. Chemometr., 2011, 25, 87-91.10.1002/cem.1342Search in Google Scholar

[28] Shabani H., Ashrafi A.R., Gutman I., Geometric-arithmetic index: an algebraic approach, Stud. Univ. Babes-Bol., 2010, 55, 107-112.Search in Google Scholar

[29] Lee D.W., Upper and lower bounds of the fourth geometric-arithmetic index, AKCE Int. J. Graphs Comb., 2013, 10, 69-76.Search in Google Scholar

[30] Ranjini P.S., Lokesha V., Eccentric connectivity index, hyper and reverse-wiener indices of the subdivision graph, General Mathematics Notes, 2011, 2, 34-46.Search in Google Scholar

[31] Morgan M.J., Mukwembi S., Swart H.C., On the eccentric connectivity index of a graph, Discrete Math., 2011, 311, 1229-1234.10.1016/j.disc.2009.12.013Search in Google Scholar

[32] Hua H., Das K.C., The relationship between the eccentric connectivity index and Zagreb indices, Discrete Appl. Math., 2013, 161, 2480-2491.10.1016/j.dam.2013.05.034Search in Google Scholar

[33] De N., On eccentric connectivity index and polynomial of thorn graph, Applied Mathematics, 2012, 3, 931-934.10.4236/am.2012.38139Search in Google Scholar

[34] Eskender B., Vumar E., Eccentric connectivity index and eccentric distance sum of some graphs operations, Transactions on Combinatorics, 2013, 2, 103-111.Search in Google Scholar

[35] Ilić A., Gutman I., Eccentric connectivity index of chemical trees, MATCH Commun. Math. Comput. Chem., 2011, 65, 731-744.Search in Google Scholar

[36] Iranmanesh M., Hafezieh R., The eccentric connectivity index of some special graphs, Iranian Journal of Mathematical Chemistry, 2011, 2, 61-65.Search in Google Scholar

[37] Dankelmann P., Morgan M.J., Mukwembi S., Swart H.C., On the eccentric connectivity index and wiener index of a graph, Quaest. Math., 2014, 37, 39-47.10.2989/16073606.2013.779963Search in Google Scholar

[38] Morgan M.J., Mukwembi S., Swart H.C., A lower bound on the eccentric connectivity index of a graph, Discrete Appl. Math., 2012, 160, 248-258.10.1016/j.dam.2011.09.010Search in Google Scholar

[39] Rao N.P., Lakshmi K., Eccentric connectivity index of V-phenylenic nanotubes, Dig. J. Nanomater. Bios., 2010, 6, 81-87.Search in Google Scholar

[40] Ediz S., Reverse eccentric connectivity index, Optoelectron. Adv. Mat., 2012, 6, 664-667.Search in Google Scholar

[41] Nejati A., Mehdi A., On reverse eccentric connectivity index of one tetragonal carbon nanocones, Journal of Theoretical and Computational Science, 2014, http://dx.doi.org/10.4172/jtco.1000115.Search in Google Scholar

Received: 2016-8-14
Accepted: 2016-9-23
Published Online: 2017-5-5

© 2017 J. Wu et al.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Articles in the same Issue

  1. Regular Articles
  2. Analysis of a New Fractional Model for Damped Bergers’ Equation
  3. Regular Articles
  4. Optimal homotopy perturbation method for nonlinear differential equations governing MHD Jeffery-Hamel flow with heat transfer problem
  5. Regular Articles
  6. Semi- analytic numerical method for solution of time-space fractional heat and wave type equations with variable coefficients
  7. Regular Articles
  8. Investigation of a curve using Frenet frame in the lightlike cone
  9. Regular Articles
  10. Construction of complex networks from time series based on the cross correlation interval
  11. Regular Articles
  12. Nonlinear Schrödinger approach to European option pricing
  13. Regular Articles
  14. A modified cubic B-spline differential quadrature method for three-dimensional non-linear diffusion equations
  15. Regular Articles
  16. A new miniaturized negative-index meta-atom for tri-band applications
  17. Regular Articles
  18. Seismic stability of the survey areas of potential sites for the deep geological repository of the spent nuclear fuel
  19. Regular Articles
  20. Distributed containment control of heterogeneous fractional-order multi-agent systems with communication delays
  21. Regular Articles
  22. Sensitivity analysis and economic optimization studies of inverted five-spot gas cycling in gas condensate reservoir
  23. Regular Articles
  24. Quantum mechanics with geometric constraints of Friedmann type
  25. Regular Articles
  26. Modeling and Simulation for an 8 kW Three-Phase Grid-Connected Photo-Voltaic Power System
  27. Regular Articles
  28. Application of the optimal homotopy asymptotic method to nonlinear Bingham fluid dampers
  29. Regular Articles
  30. Analysis of Drude model using fractional derivatives without singular kernels
  31. Regular Articles
  32. An unsteady MHD Maxwell nanofluid flow with convective boundary conditions using spectral local linearization method
  33. Regular Articles
  34. New analytical solutions for conformable fractional PDEs arising in mathematical physics by exp-function method
  35. Regular Articles
  36. Quantum mechanical calculation of electron spin
  37. Regular Articles
  38. CO2 capture by polymeric membranes composed of hyper-branched polymers with dense poly(oxyethylene) comb and poly(amidoamine)
  39. Regular Articles
  40. Chain on a cone
  41. Regular Articles
  42. Multi-task feature learning by using trace norm regularization
  43. Regular Articles
  44. Superluminal tunneling of a relativistic half-integer spin particle through a potential barrier
  45. Regular Articles
  46. Neutrosophic triplet normed space
  47. Regular Articles
  48. Lie algebraic discussion for affinity based information diffusion in social networks
  49. Regular Articles
  50. Radiation dose and cancer risk estimates in helical CT for pulmonary tuberculosis infections
  51. Regular Articles
  52. A comparison study of steady-state vibrations with single fractional-order and distributed-order derivatives
  53. Regular Articles
  54. Some new remarks on MHD Jeffery-Hamel fluid flow problem
  55. Regular Articles
  56. Numerical investigation of magnetohydrodynamic slip flow of power-law nanofluid with temperature dependent viscosity and thermal conductivity over a permeable surface
  57. Regular Articles
  58. Charge conservation in a gravitational field in the scalar ether theory
  59. Regular Articles
  60. Measurement problem and local hidden variables with entangled photons
  61. Regular Articles
  62. Compression of hyper-spectral images using an accelerated nonnegative tensor decomposition
  63. Regular Articles
  64. Fabrication and application of coaxial polyvinyl alcohol/chitosan nanofiber membranes
  65. Regular Articles
  66. Calculating degree-based topological indices of dominating David derived networks
  67. Regular Articles
  68. The structure and conductivity of polyelectrolyte based on MEH-PPV and potassium iodide (KI) for dye-sensitized solar cells
  69. Regular Articles
  70. Chiral symmetry restoration and the critical end point in QCD
  71. Regular Articles
  72. Numerical solution for fractional Bratu’s initial value problem
  73. Regular Articles
  74. Structure and optical properties of TiO2 thin films deposited by ALD method
  75. Regular Articles
  76. Quadruple multi-wavelength conversion for access network scalability based on cross-phase modulation in an SOA-MZI
  77. Regular Articles
  78. Application of ANNs approach for wave-like and heat-like equations
  79. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  80. Study on node importance evaluation of the high-speed passenger traffic complex network based on the Structural Hole Theory
  81. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  82. A mathematical/physics model to measure the role of information and communication technology in some economies: the Chinese case
  83. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  84. Numerical modeling of the thermoelectric cooler with a complementary equation for heat circulation in air gaps
  85. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  86. On the libration collinear points in the restricted three – body problem
  87. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  88. Research on Critical Nodes Algorithm in Social Complex Networks
  89. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  90. A simulation based research on chance constrained programming in robust facility location problem
  91. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  92. A mathematical/physics carbon emission reduction strategy for building supply chain network based on carbon tax policy
  93. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  94. Mathematical analysis of the impact mechanism of information platform on agro-product supply chain and agro-product competitiveness
  95. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  96. A real negative selection algorithm with evolutionary preference for anomaly detection
  97. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  98. A privacy-preserving parallel and homomorphic encryption scheme
  99. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  100. Random walk-based similarity measure method for patterns in complex object
  101. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  102. A Mathematical Study of Accessibility and Cohesion Degree in a High-Speed Rail Station Connected to an Urban Bus Transport Network
  103. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  104. Design and Simulation of the Integrated Navigation System based on Extended Kalman Filter
  105. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  106. Oil exploration oriented multi-sensor image fusion algorithm
  107. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  108. Analysis of Product Distribution Strategy in Digital Publishing Industry Based on Game-Theory
  109. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  110. Expanded Study on the accumulation effect of tourism under the constraint of structure
  111. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  112. Unstructured P2P Network Load Balance Strategy Based on Multilevel Partitioning of Hypergraph
  113. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  114. Research on the method of information system risk state estimation based on clustering particle filter
  115. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  116. Demand forecasting and information platform in tourism
  117. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  118. Physical-chemical properties studying of molecular structures via topological index calculating
  119. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  120. Local kernel nonparametric discriminant analysis for adaptive extraction of complex structures
  121. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  122. City traffic flow breakdown prediction based on fuzzy rough set
  123. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  124. Conservation laws for a strongly damped wave equation
  125. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  126. Blending type approximation by Stancu-Kantorovich operators based on Pólya-Eggenberger distribution
  127. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  128. Computing the Ediz eccentric connectivity index of discrete dynamic structures
  129. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  130. A discrete epidemic model for bovine Babesiosis disease and tick populations
  131. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  132. Study on maintaining formations during satellite formation flying based on SDRE and LQR
  133. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  134. Relationship between solitary pulmonary nodule lung cancer and CT image features based on gradual clustering
  135. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  136. A novel fast target tracking method for UAV aerial image
  137. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  138. Fuzzy comprehensive evaluation model of interuniversity collaborative learning based on network
  139. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  140. Conservation laws, classical symmetries and exact solutions of the generalized KdV-Burgers-Kuramoto equation
  141. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  142. After notes on self-similarity exponent for fractal structures
  143. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  144. Excitation probability and effective temperature in the stationary regime of conductivity for Coulomb Glasses
  145. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  146. Comparisons of feature extraction algorithm based on unmanned aerial vehicle image
  147. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  148. Research on identification method of heavy vehicle rollover based on hidden Markov model
  149. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  150. Classifying BCI signals from novice users with extreme learning machine
  151. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  152. Topics on data transmission problem in software definition network
  153. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  154. Statistical inferences with jointly type-II censored samples from two Pareto distributions
  155. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  156. Estimation for coefficient of variation of an extension of the exponential distribution under type-II censoring scheme
  157. Special issue on Nonlinear Dynamics in General and Dynamical Systems in particular
  158. Analysis on trust influencing factors and trust model from multiple perspectives of online Auction
  159. Special Issue on Advances on Modelling of Flowing and Transport in Porous Media
  160. Coupling of two-phase flow in fractured-vuggy reservoir with filling medium
  161. Special Issue on Advances on Modelling of Flowing and Transport in Porous Media
  162. Production decline type curves analysis of a finite conductivity fractured well in coalbed methane reservoirs
  163. Special Issue on Advances on Modelling of Flowing and Transport in Porous Media
  164. Flow Characteristic and Heat Transfer for Non-Newtonian Nanofluid in Rectangular Microchannels with Teardrop Dimples/Protrusions
  165. Special Issue on Advances on Modelling of Flowing and Transport in Porous Media
  166. The size prediction of potential inclusions embedded in the sub-surface of fused silica by damage morphology
  167. Special Issue on Advances on Modelling of Flowing and Transport in Porous Media
  168. Research on carbonate reservoir interwell connectivity based on a modified diffusivity filter model
  169. Special Issue on Advances on Modelling of Flowing and Transport in Porous Media
  170. The method of the spatial locating of macroscopic throats based-on the inversion of dynamic interwell connectivity
  171. Special Issue on Advances on Modelling of Flowing and Transport in Porous Media
  172. Unsteady mixed convection flow through a permeable stretching flat surface with partial slip effects through MHD nanofluid using spectral relaxation method
  173. Special Issue on Advances on Modelling of Flowing and Transport in Porous Media
  174. A volumetric ablation model of EPDM considering complex physicochemical process in porous structure of char layer
  175. Special Issue on Advances on Modelling of Flowing and Transport in Porous Media
  176. Numerical simulation on ferrofluid flow in fractured porous media based on discrete-fracture model
  177. Special Issue on Advances on Modelling of Flowing and Transport in Porous Media
  178. Macroscopic lattice Boltzmann model for heat and moisture transfer process with phase transformation in unsaturated porous media during freezing process
  179. Special Issue on Advances on Modelling of Flowing and Transport in Porous Media
  180. Modelling of intermittent microwave convective drying: parameter sensitivity
  181. Special Issue on Advances on Modelling of Flowing and Transport in Porous Media
  182. Simulating gas-water relative permeabilities for nanoscale porous media with interfacial effects
  183. Special Issue on Advances on Modelling of Flowing and Transport in Porous Media
  184. Simulation of counter-current imbibition in water-wet fractured reservoirs based on discrete-fracture model
  185. Special Issue on Advances on Modelling of Flowing and Transport in Porous Media
  186. Investigation effect of wettability and heterogeneity in water flooding and on microscopic residual oil distribution in tight sandstone cores with NMR technique
  187. Special Issue on Advances on Modelling of Flowing and Transport in Porous Media
  188. Analytical modeling of coupled flow and geomechanics for vertical fractured well in tight gas reservoirs
  189. Special Issue on Ever-New "Loopholes" in Bell’s Argument and Experimental Tests
  190. Special Issue: Ever New "Loopholes" in Bell’s Argument and Experimental Tests
  191. Special Issue on Ever-New "Loopholes" in Bell’s Argument and Experimental Tests
  192. The ultimate loophole in Bell’s theorem: The inequality is identically satisfied by data sets composed of ±1′s assuming merely that they exist
  193. Special Issue on Ever-New "Loopholes" in Bell’s Argument and Experimental Tests
  194. Erratum to: The ultimate loophole in Bell’s theorem: The inequality is identically satisfied by data sets composed of ±1′s assuming merely that they exist
  195. Special Issue on Ever-New "Loopholes" in Bell’s Argument and Experimental Tests
  196. Rhetoric, logic, and experiment in the quantum nonlocality debate
  197. Special Issue on Ever-New "Loopholes" in Bell’s Argument and Experimental Tests
  198. What If Quantum Theory Violates All Mathematics?
  199. Special Issue on Ever-New "Loopholes" in Bell’s Argument and Experimental Tests
  200. Relativity, anomalies and objectivity loophole in recent tests of local realism
  201. Special Issue on Ever-New "Loopholes" in Bell’s Argument and Experimental Tests
  202. The photon identification loophole in EPRB experiments: computer models with single-wing selection
  203. Special Issue on Ever-New "Loopholes" in Bell’s Argument and Experimental Tests
  204. Bohr against Bell: complementarity versus nonlocality
  205. Special Issue on Ever-New "Loopholes" in Bell’s Argument and Experimental Tests
  206. Is Einsteinian no-signalling violated in Bell tests?
  207. Special Issue on Ever-New "Loopholes" in Bell’s Argument and Experimental Tests
  208. Bell’s “Theorem”: loopholes vs. conceptual flaws
  209. Special Issue on Ever-New "Loopholes" in Bell’s Argument and Experimental Tests
  210. Nonrecurrence and Bell-like inequalities
  211. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  212. Three-dimensional computer models of electrospinning systems
  213. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  214. Electric field computation and measurements in the electroporation of inhomogeneous samples
  215. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  216. Modelling of magnetostriction of transformer magnetic core for vibration analysis
  217. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  218. Comparison of the fractional power motor with cores made of various magnetic materials
  219. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  220. Dynamics of the line-start reluctance motor with rotor made of SMC material
  221. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  222. Inhomogeneous dielectrics: conformal mapping and finite-element models
  223. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  224. Topology optimization of induction heating model using sequential linear programming based on move limit with adaptive relaxation
  225. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  226. Detection of inter-turn short-circuit at start-up of induction machine based on torque analysis
  227. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  228. Current superimposition variable flux reluctance motor with 8 salient poles
  229. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  230. Modelling axial vibration in windings of power transformers
  231. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  232. Field analysis & eddy current losses calculation in five-phase tubular actuator
  233. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  234. Hybrid excited claw pole generator with skewed and non-skewed permanent magnets
  235. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  236. Electromagnetic phenomena analysis in brushless DC motor with speed control using PWM method
  237. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  238. Field-circuit analysis and measurements of a single-phase self-excited induction generator
  239. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  240. A comparative analysis between classical and modified approach of description of the electrical machine windings by means of T0 method
  241. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  242. Field-based optimal-design of an electric motor: a new sensitivity formulation
  243. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  244. Application of the parametric proper generalized decomposition to the frequency-dependent calculation of the impedance of an AC line with rectangular conductors
  245. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  246. Virtual reality as a new trend in mechanical and electrical engineering education
  247. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  248. Holonomicity analysis of electromechanical systems
  249. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  250. An accurate reactive power control study in virtual flux droop control
  251. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  252. Localized probability of improvement for kriging based multi-objective optimization
  253. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  254. Research of influence of open-winding faults on properties of brushless permanent magnets motor
  255. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  256. Optimal design of the rotor geometry of line-start permanent magnet synchronous motor using the bat algorithm
  257. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  258. Model of depositing layer on cylindrical surface produced by induction-assisted laser cladding process
  259. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  260. Detection of inter-turn faults in transformer winding using the capacitor discharge method
  261. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  262. A novel hybrid genetic algorithm for optimal design of IPM machines for electric vehicle
  263. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  264. Lamination effects on a 3D model of the magnetic core of power transformers
  265. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  266. Detection of vertical disparity in three-dimensional visualizations
  267. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  268. Calculations of magnetic field in dynamo sheets taking into account their texture
  269. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  270. 3-dimensional computer model of electrospinning multicapillary unit used for electrostatic field analysis
  271. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  272. Optimization of wearable microwave antenna with simplified electromagnetic model of the human body
  273. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  274. Induction heating process of ferromagnetic filled carbon nanotubes based on 3-D model
  275. Special Issue: The 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering ISEF 2017
  276. Speed control of an induction motor by 6-switched 3-level inverter
Downloaded on 10.9.2025 from https://www.degruyterbrill.com/document/doi/10.1515/phys-2017-0029/html
Scroll to top button