Startseite Special Issue: Ever New "Loopholes" in Bell’s Argument and Experimental Tests
Artikel Open Access

Special Issue: Ever New "Loopholes" in Bell’s Argument and Experimental Tests

  • Karl Hess EMAIL logo , Hans De Raedt und Andrei Khrennikov
Veröffentlicht/Copyright: 26. September 2017

Contradictory results, arising from great theories of science and their experimental tests, have been the focus of intense discussions and seeds for progress of past and present scientific research. Perhaps one of the clearest examples for this fact has been presented by discussions of Einstein and Poincaré related to Euclidean geometry [1] and the apparent contradictions to its results by Einstein’s general relativity (which was confirmed by measurements of deflection of starlight by the sun during the 1919 total eclipse).

How could Euclidean geometry be wrong as a mathematical-logical framework? The solution of this conundrum by Einstein and Poincaré is as follows. Any framework like Euclidean Geometry seen as a mathematical framework has as such nothing to do with nature. The axioms can be seen as definitions and, therefore, such a framework cannot contradict the experiments, because it has (in principle) nothing to do with the experiments. As such it also cannot contradict other mathematical-logical frameworks as long as these are only considered as such with axioms that again can be seen as definitions.

A link to experiments needs to be established that then extends the purely logical-mathematical theory to the objects of the physical reality and, therefore extends it to a physical science. This extension of Euclidean Geometry had been achieved by the introduction of the absolutely rigid body. Only with this additional concept can Euclidean geometry be compared to experiments. If then there exists a discrepancy to experimental results, it is that concept of the rigid body which needs to be rejected, if we do not wish to give up logic.

This special issue discusses a conundrum that arises from the results of quantum theory for certain measurements that are in contradiction to the theoretical framework of John S. Bell and his followers. They derived inequalities (which they often claim are based only on Einstein’s physics, particularly Einstein’s separation principle) that contradict quantum theory and a large number of recent experiments related to quantum theory.

The proposal of Bell and many of his followers to resolve this conundrum turns against the spirit of Einstein’s relativity theory, because it contains the introduction of instantaneous influences faster than the speed of light that occur over arbitrary large distances between so called “entangled” particles. This proposal is currently accepted by a large number of physicists and by almost all science writers.

There exists, however, also a significant number of researchers that have found issues with the work of Bell and his followers. Some of these issues were dubbed “loopholes”. These loopholes in Bell’s reasoning arose in our opinion mainly from the following facts. First, to make an airtight case for the physical validity of his inequality, Bell gave additional directions of how the experiments needed to be performed, directions that had no counterpart, and could not have a counterpart, in his theory. For example, the physically so important time-variable cannot be included into Bell’s formalism in any straightforward way, because all his variables may (and some even must) vary in a totally random way. However, time is not a random variable in any sense of the word. Second, Bell used the concept of probability and joint probability measures in his derivations. The existence of such measures is not given by any logical or mathematical reason but determined by the relation of the mathematical abstractions to the experiments, for example to the fact whether the experiments are performed in pairs, triples or quadruples. For an elaborate discussion of related problems see Khrennikov this issue and [2]. As a consequence of these and other facts, so dubbed loopholes were discovered in Bell’s reasoning and the burden to close these loopholes was shifted to the experimenters.

This special issue contains contributions that resolve the Bell-conundrum in a variety of ways, which are related to the connections of Einstein’s classical physics and of quantum theory to the experiments. Problems of Bell’s argument and the connections of his specific approach to the experiments are, of course, also central to several contributions. For example, the assumption of triples and quadruples of experiments instead of just pairs that indeed are actually measured is pinpointed as a cause of the conundrum (analogous to the assumption of the absolutely rigid body in the Einstein-Poincare discussions). The guest editors of this special issue are convinced by these contributions that the Bell-conundrum can definitely be resolved without recourse to instantaneous influences at a distance or “spooky influences” as Einstein called them.

1 Einstein-Podolsky-Rosen’s Gedankenexperiment and Bell-type inequalities

The Basis for Bell’s work is the well know Gedankenexperiment of Einstein, Podolsky and Rosen in its modification by Bohm (EPRB). Two atomic or subatomic particles (photons, electrons etc.) are prepared at a source in a correlated state and are sent out in opposite directions to two spatially separated measurement stations, where their polarization is measured by complicated equipment and where by some means it is assured that one deals with a sent-out correlated pair. The experiment is geared to assess the validity of Einstein separability i.e. whether or not the experiments in the two stations are independent of the experimental arrangement and measurement of the other station at the moments of measurement of the pair.

The measurement settings (polarizers etc.) are, therefore, switched quickly in order to exclude the possibility of any information-exchange with the speed of light or slower during the moments of the pair measurement. Light moves in a nanosecond about 30 cm and polarizer settings can be switched easily within 100 nanoseconds or less, which means the two measurement stations may be as close as a few meters, but have actually been implemented at a distance of tens of miles, for example at the islands of Tenerife and La Palma. Recent measurements have even involved a satellite and the Chinese cities of Delingha and Lijiang.

It is now commonly reported or at least implied by science writers that it has been proven, by measurement of a single correlated pair, that the measurement in one station influences instantaneously the outcome in the other station; implying thus signalling much faster than the speed of light. This claim is false. No single pair measurement has ever shown any influence faster than the speed of light. Such a fact would completely destroy Einstein’s theory of relativity and no sane physicist believes such flapdoodle (as Murray Gell-Mann called it).

Kupczynski explains how reported violations of nosignalling in twin-photon beam experiments may be caused by setting dependent post-selection of data necessary to identify correlated detector clicks (see also section Bell game below). Graft shows that the projection postulate suffers from fundamental deficiencies that brings its validity into serious doubt. Its application to EPRB experiments in particular must be invalid, because it requires superluminal transmission of information in contradiction with special relativity. If projection is excluded, the EPR paradox is resolved and quantum nonlocality is a non sequitur.

Bell (in his later years) and his followers did and do indeed assert that influences faster than the speed of light are involved in EPRB experiment. However, they deduce this assertion from the statistics of very many pairmeasurements. The basis of their deduction is the statistical violation of an inequality derived by Bell and variations of Bell’s inequality that were proposed by Clauser, Horne, Shimony and Holt as well as Eberhardt and others. These inequalities are often presented, even in textbooks, as if they were only based on the rules of adding and subtracting numbers, or only based on group theory. However, as explained in this special issue, such presentations amount to gross oversimplification. A short explanation of this fact is given next.

Bell type inequalities are usually derived for 3 or 4 pair measurements each corresponding to a pair of equipment settings and resulting in detector outcomes that are mostly represented by real numbers of the interval [−1, +1]. For example we can have possible measurement outcomes A, B, C, D corresponding to different measurement settings a, b, c, d with −1 ≤ A, B, C, D ≤ +1 or more often just with the digital result A, B, C, D = ±1. The Clauser-Horne-Shimony-Holt (CHSH) inequality which is a Bell-type inequality frequently addressed in actual experiments is then stated to be:

|AB+AC+DBDC|2(1.1)

It is very easy to insert all possible values of A, B, C, D = ±1 into the equality and convince one-selves that it is satisfied just by the laws of integer numbers and, with a little more effort, also if the real numbers are used. In many popular presentations the CHSH inequality is, therefore, presented as an obvious fact followed by the remark that some results of quantum theory surprisingly violate this inequality.

Rosinger shows in this issue, with precise mathematical logic, that if the above view were true, the consequences would be dire indeed for the consistency of either mathematics or quantum theory or both.

We have thus a situation that is analogous to the above mentioned Einstein-Poincare discussions and must investigate the connection of both Bell-type inequalities and quantum theory to the elements of physical reality, the data and attempt to find an inaccuracy or weakness in this connection, just as Einstein pinpointed the absolutely rigid body as the problem. An extensive literature on these problematic connections has been accumulated since the appearance of Bell’s seminal paper. Kracklauer reviews early objections to Bell’s approach that are still valid.

The problems of the approach of Bell and his followers are further traced in this issue to several problematic links of Bell-type theories with the actual EPRB experiments: (i) counterfactual reasoning about the experiments, reasoning that would not be permitted in court, (ii) the measurements are assumed in Bell-type work to be performed in triples, quadruples etc., while they are performed in pairs in the actual experiments. Related to this assumption (iii) Bell implies the existence of certain joint probabilities of possible experimental outcomes that cannot be derived from and are inconsistent with the actual experiments much as the absolutely rigid body is inconsistent with the findings of Einstein’s general relativity. Finally (iv) a slightly changed inequality has been presented by Wigner that is believed by many to only involve group theory and Einstein locality (his separation principle). A closer look, however shows that (iv) is actually based on (iii). These points are discussed below and in other contributions of this special issue.

First, a detailed investigation of related books, for example those of Peres and Leggett shows that Eq. (2.1) is based on more than the laws of real numbers and is typically connected to the data of experiments by additional so called counterfactual reasoning (reasoning involving “data" that would have been obtained if the measurements would have been performed in other ways). The problems with counterfactual reasoning have been discussed in the literature and it has been shown that counterfactual reasoning restricts the connection of Bell’s theory to experiments so significantly that it makes the application of that theory to EPRB experiments questionable. It is also unacceptable to abandon the consistency of mathematics and quantum theory just because of counterfactual arguments.

Second, if the possible outcomes A, B, C, D can be simultaneously measured then indeed Eq. (2.1) follows and is valid and still contradicts some of the results of quantum theory. The expression “simultaneously measured” has here nothing to do with Einstein’s definition of simultaneity but simple means that about all data can be ordered in quadruples A, B, C, D or even better in quadruples of the pairs of Eq. (2.1). It is, however, a fact that all actual measurements are just performed in pairs and not simultaneously in triples or quadruples etc.. This fact makes it impossible to prove Eq. (2.1) without additional assumptions and also points to the possibility that quantum theory agrees with the CHSH inequality, if more than one pair of settings is involved in the measurements. This latter fact is discussed in detail by Sica and also by Graft.

Third, there exists another simple reasoning that seems to validate Eq. (2.1). Just assume that the joint probability measures for outcomes A, B, C, D exist, so that we have, for example, a probability measure of 0.1 for the result A = +1, B = −1, C = −1 and D = −1 and similar for all other possible outcomes. Then again Eq. (2.1) is valid, the A, B, C, D now being Boolean variables or Kolmogorov’s random variables. Ways out of this conundrum are given in paper by Sica. Others ways have also been discussed in the literature.

Finally we do not even need to regard the A, B, C, D as numbers but may regard them as any form of outcome such as up or down, plus or minus and so on. Wigner has shown that one can formulate an inequality just for the equal and not equal outcomes of measured pairs and many have claimed that Wigner’s proof is only based on group theory. This result, however brings us back to Rosinger’s work. Group theory is also the basis of quantum mechanics and how can a group theoretical theorem contradict quantum mechanics without the breakdown of our whole mathematical-physics framework?

It was also shown recently by Hess, De Raedt and Michielsen that Wigner used the assumption of the existence of joint probabilities and with it violated topological-combinatorial factors that are important for the actual experiments [3].

Overall, the contributions in this issue (together with previous publications of some of the contributors) show that the connection of the Bell-type inequalities to actual experiments and also the connections of quantum mechanics to the actual experiments need to be carefully considered and the inclusion of these considerations permit to remove in one way or the other the conundrum. The conundrum shows mainly that Bell-type formulations are based on unwarranted assumptions.

Some may still claim that Eq. (2.1) can also be justified by the assumption that the velocity of light c in vacuum is the limit of all possible velocities, from which Einstein’s separation principle follows. However no connection of Eq. (2.1) to the Einstein separation principle (Einstein locality) has ever been proven. Bell’s assumption that his variable λ does not depend on the equipment settings is simply not a necessary assumption to fulfill the separation principle, because λ may depend on the setting of the local equipment.

One asks then, how can a reasonable person still believe in the relevance of the CHSH inequality and all Bell-type inequalities for actual EPRB experiments. The answer to this question is at least threefold.

First none of the Bell-type derivations contain all the measured data that are necessary for the identification and count of the pairs. The measurement stations (including the source of the particle pairs) contain equipment that tells us which signals belong to correlated pairs and which signals may not or do not belong to this set. Bell’s theory is, therefore incomplete. Bell and followers do not acknowledge this fact and do not attempt to complete their theory. Instead they try to take care of deficiencies by imposing additional requirements on the experiments. Violation of these requirements are the so called “loopholes” and many researchers still believe that they can close these loopholes or have already closed them.

Second, violations of the inequality can be explained by faster then light communication between the stations in a very simple way, actually in the simplest way and thus are commensurate with Occam’s razor (unfortunately spooky influences are always the simplest way).

Third, and most important, no one seems to be able to play the so called Bell game. We discuss this game next and show in this issue how it can be played without instantaneous influences at a distance. This latter possibility also hints to the fact that the closure of all loopholes is very difficult and, in the opinion of the guest editors and authors of this issue close to impossible.

2 The Bell Game and how it can be played

The requirement of the followers of Bell that the so called “Bell game” needs to be played by opponents, who must master it without instantaneous influences at a distance, appears at first glance reasonable. The Bell game involves two players Alice and Bob who work at separated measurement stations, say at Delingha and Lijiang respectively. They have no communication with each other and know nothing of the other station. The settings in their stations are randomly changed between a, d in Delingha and b, c in Lijiang. When receiving a clue that a correlated particle has arrived, they need to choose a measurement outcome +1 or −1. After many such choices, averages 〈…〉 are taken and the CHSH inequality for these averages:

|AB+AC+DBDC|2(2.1)

must be violated. If you can play this game without knowing anything from the other side you have defeated the CHSH or any other Bell-type inequalities.

The followers of Bell believe that this game cannot be played and that one does need instantaneous influences at a distance to play it. This means Alice knows somehow Bob’s equipment settings and Bob knows Alice’s all at the moment of measuring a somehow correlated pair.

One of us (K.H.) was told on numerous occasions that nature can play this game, so why can’t you? The reason why one cannot play the game, as becomes clear from the paper by De Raedt, Michielsen and Hess in this special issue, is that correlations of spatially separated measurements cannot even be conceived if the experimenters in the stations know nothing from each other. How do Alice or Bob know that they are dealing with one particle of a correlated pair if they know nothing about each other, if they do not even know what is going on on the other side. We are arriving here at an epistemological problem. How can we know about a correlation at a distance if we do not know how the events occur in space and time, how the detectors confirm the measurement of a particle and how the selection of the particle as part of a correlated pair is made? How do the settings of the local measurement stations influence the selection of a particular particle to be part of a distant pair? And selections must be made, which also means that the measured set of pairs is reduced from the larger set of sent out pairs, a fact already discussed by Fine (see also [4]).

Indeed all actual experiments do include methods of measurement to determine the pairing. This can be done by synchronized clock’s and corresponding local time measurements or by a chosen threshold for the detectors in both stations and by combinations of these and other means. This knowledge then opens, as is shown by the paper of De Raedt, Michielsen and Hess, a door to play the Bell game without any instantaneous influences at a distance, without any quantum nonlocality. They dubbed this door the “photon identification loophole”. This loophole permits to violate Bell type inequalities by computer experiments and to obtain the result predicted by quantum theory for the example of the CHSH inequality and measurements of M. Giustina et al.. These computer experiments use exclusively local (in the respective measurement stations) selection of photons and utilize a mechanism that involves a dependence of the selection on the local measurement settings through considerations involving the detection mechanism; a dependence that appears to be fully commensurate with the experimental arrangements and data.

The paper of Graft investigates a number of well known loopholes related to detector inefficiencies, improper post-selection and other factors and demonstrates convincingly that the loopholes are not closed by the experiments of Hensen et al. who claimed such closure in a recent publication that has received much attention and a report in the New York Times. Kupcynski also discusses the contextuality loophole that, in his opinion, cannot be closed.

3 Conclusion

The papers of our special issue demonstrate clearly that the framework of Bell and his followers contains significant weaknesses that make its connection and applicability to the actual EPRB experiments questionable. These weaknesses and corresponding loopholes cannot be closed by just varying the experimental conditions. The demarcation line that Bell-type inequalities represent is extinguished by fundamental deficiencies of Bell-type derivations and by loopholes ranging from post-selection to photon-identification. It appears, therefore, imperative to view EPRB experiments within a broader perspective, a perspective that includes careful investigations of the detailed photon(particle)-identification-process and also of the precision with which the experiments agree with quantum theory.

References

[1] Einstein A., Ideas and Opinions, Three Rivers Press, New York, 1982, pp 234-237Suche in Google Scholar

[2] Khrennikov, A., After Bell, Fortschritte der Physic 65, Issue 6-8, 201710.1002/prop.201600044Suche in Google Scholar

[3] Hess, K., De Raedt, H. and Michielsen, K., Analysis of Wigner’s Set Theoretical Proof for Bell-Type Inequalities, Journal of Modern Physics 8, 2017, pp 57-6710.4236/jmp.2017.81005Suche in Google Scholar

[4] Zhao, S., De Raedt, H., and Michielsen, K., Event-by-event simulation of Einstein-Podolsky-Rosen experiments, Found. Phys. 38, 2008, pp322-34710.1007/s10701-008-9205-5Suche in Google Scholar

Received: 2017-8-30
Accepted: 2017-8-30
Published Online: 2017-9-26

© 2017 Karl Hess et al.

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

Artikel in diesem Heft

  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
Heruntergeladen am 12.10.2025 von https://www.degruyterbrill.com/document/doi/10.1515/phys-2017-0067/html?licenseType=open-access
Button zum nach oben scrollen