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| 1 | Iterative Methods of Richardson-Lucy-Type for Image Deblurring显示文摘Image deconvolution problems with a symmetric point-spread function arisein many areas of science and engineering. These problems often are solved by theRichardson-Lucy method, a nonlinear iterative method. We first show a convergenceresult for the Richardson-Lucy method. The proof sheds light on why the method mayconverge slowly. Subsequently, we describe an iterative active set method that imposesthe same constraints on the computed solution as the Richardson-Lucy method. Computed examples show the latter method to yield better restorations than the RichardsonLucy method and typically require less computational effort. | M.K.Khan S.Morigi L.Reichel F.Sgallari | 2013 | Numerical Mathematics(Theory,Methods and Applications)2013，6，1： | 1 |
| 2 | Non-Maximal Tripartite Entanglement Degradation of Dirac and Scalar Fields in Non-Inertial Frames显示文摘The π-tangle is used to study the behavior of entanglement of a nonmaximal tripartite state of both Dirac and scalar fields in accelerated frame. For Dirac fields, the degree of degradation with acceleration of both one-tangle of accelerated observer and π-tangle, for the same initial entanglement, is different by just interchanging the values of probability amplitudes. A fraction of both one-tangles and the π-tangle always survives for any choice of acceleration and the degree of initial entanglement. For scalar field, the one-tangle of accelerated observer depends on the choice of values of probability amplitudes and it vanishes in the range of infinite acceleration, whereas for π-tangle this is not always true. The dependence of π-tangle on probability amplitudes varies with acceleration. In the lower range of acceleration,its behavior changes by switching between the values of probability amplitudes and for larger values of acceleration this dependence on probability amplitudes vanishes. Interestingly, unlike bipartite entanglement, the degradation of π-tangle against acceleration in the case of scalar fields is slower than for Dirac fields. | Salman Khan Niaz Ali Khan M.K.Khan | 2014 | Communications in Theoretical Physics2014，61，3： | 1 |
| 3 | Quantum Monty Hall Problem under Decoherence显示文摘我们在振幅抑制的影响下面在量门帝霍尔问题上学习 decoherence 的效果,动摇,并且 dephasing 隧道。在 decoherence 的效果下面,有在动摇的情况下的比赛的纳什平衡,这被显示出为艾莉斯的量策略的隧道。而在 dephasing 噪音的情况下,比赛没由量隧道被影响。为抑制隧道的振幅,鲍勃的发薪关于 50% 的 decoherence 被发现对称,最大值为他的古典策略发生在 decoherence 的这价值。然而,它是提及价值的在动摇的情况下隧道,鲍勃的古典策略对艾莉斯的策略的任何选择仍然保持总是主导。 | Salman Khan M.Ramzan M.K.Khan | 2010 | Communications in Theoretical Physics2010，，7： | 0 |
| 4 | Ballistic response of skin simulant against fragment simulating projectiles显示文摘The response of biological phantoms against high velocity impact is actively sought for applications in defense,space,soft robotics and sensing.Towards this end,we study the ballistic response of silicone based skin simulant against fragment impact.Using a pneumatic gas gun setup,six chisel-nosed and three regular shaped(sphere,cylinder,and cube)fragments were impacted on the skin simulant.The resulting skin simulant response was studied in terms of ballistic limit velocities,energy densities,failure pattern,and the mechanics of interaction.The results indicate that the shape of the fragment affects the ballistic limit velocities.The ballistic limit velocities,energy densities of the chisel-nosed fragment simulating projectiles were relatively insensitive to the size(mass),except for the smallest(0.16 g)and largest(2.79 g)chisel-nosed fragment.For the same size(1 g),ballistic limit velocities and failure are dependent on the shape of the fragment.The skin simulant failed by combined plugging and elastic hole enlargement.Failure in the spherical fragment was dominated by the elastic hole enlargement,whereas plugging failure was dominant in all other fragments.The spherical,cylindrical,and chisel-nosed fragments created circular cavities,and the cubical fragment created a square cavity.In the case of the spherical fragment,slipping of the fragment within the skin simulant was seen.Cubical fragments created lateral cracks emanating from the corners of the square cavity.Interestingly,for all the fragments,the maximum deformation corresponding to the perforation was lower than the non-perforation indicating rate dependent,stress driven failure.The maximum deformation was also dependent on the shape of the fragment.Overall,these results provide unique insights into the mechanical response of a soft simulant against ballistic impact.Results have utility in the calibration and validation of computational models,design of personal protective equipment,and antipersonnel systems. | Punit Kumar Pandey Atul Harmukh M.K.Khan M.A.Iqbal S.G.Ganpule | 2023 | Defence Technology(防务技术)2023，30，12： | 0 |
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