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Information transmission through parallel multi-task-based recognition of high-resolution multiplexed orbital angular momentum

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Frontiers of physics 2024年第5期19卷 167-177页

作者： Jingwen Zhou Yaling yin Jihong Tang Yong Xia jianping yin State key laboratory of precision spectroscopy School of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China NYU-ECNU Institute of Physics at NYU Shanghai Shanghai 200062China

Orbital angular momentums(OAMs)greatly enhance the channel capacity in free-space optical ***,demodulation of superposed OAM to recognize them separately is always difficult,especially upon multiplexing more *** this work,we report a directly recognition of multiplexed fractional OAM modes,without separating them,at a resolution of 0.1 with high accuracy,using a multi-task deep learning(MTDL)model,which has not been reported ***,two-mode,four-mode,and eight-mode superposed OAM beams,experimentally generated with a hologram carrying both phase and amplitude information,are well recognized by the suitable MTDL *** applications in information transmission are presented:the first is for 256-ary OAM shift keying via multiplexed fractional OAMs;the second is for OAM division multiplexed information transmission in an eightfold *** encouraging results will expand the capacity in future free-space optical communication.

关键词： information transmission orbital angular momentum multitask deep learning holographic multiplexing structured light

Mechanical behavior of nanorubber reinforced epoxy over a wide strain rate loading

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Nano Materials Science 2024年第1期6卷 106-114页

作者： yinggang Miao jianping yin Wenxuan Du Lianyang Chen Joint International Research Laboratory of Impact Dynamics and Its Engineering Applications School of AeronauticsNorthwestern Polytechnical UniversityXi'anShaanxi710072China State Key Laboratory for Strength and Vibration of Mechanical Structures Xi'an Jiaotong UniversityXi'anShaanxi710049China Shaanxi Key Laboratory of Impact Dynamics and Its Engineering Application School of AeronauticsNorthwestern Polytechnical UniversityXi'anShaanxi710072China

Nanorubber/epoxy composites containing 0,2,6 and 10 wt%nanorubber are subjected to uniaxial compression over a wide range of strain rate from 8×10^(-4) s^(-1) to~2×10^(4) s^(-1).Unexpectedly,their strain rate sensitivity and strain hardening index increase with increasing nanorubber *** mechanisms are proposed based on numerical simulations using a unit cell *** increase in the strain rate sensitivity with increasing nanorubber content results from the fact that the nanorubber becomes less incompressible at high strain,generating a higher hydro-static *** shear localization starts to occur in the epoxy under a strain rate of 22,000 s^(-1) when the strain exceeds *** presence of nanorubber in the epoxy reduces adiabatic shear localization by preventing it from propagating.

关键词： Strain rate Strain hardening Nano rubber Epoxy Adiabatic shearing localization

A model for real-time computation of fuselage-rotor interference

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International Journal of Modeling, Simulation, and Scientific Computing 2017年第4期8卷 10-24页

作者： Berend G.van der Wall jianping yin Institute of Flight Systems DLR Lilienthalplatz 738108 BraunschweigGermany Institute of Aerodynamics and Flow Technology DLR Lilienthalplatz 738108 BraunschweigGermany

A simple analytical real-time capable model to account for fuselage-induced velocities at rotor blade elements is described at the example of the Bo105 *** of the fuselage-induced flow fields in the volume of rotor operation above the fuselage are first computed by a panel method in the range of angle of attack and sideslip of±90°.The model parameters are then estimated based on these *** usefulness of the model in combinations of angle of attack and sideslip is demonstrated.

关键词： Helicopter aerodynamics fuselage-rotor interference real-time simulation

Simulation of EOM-based frequency-chirped laser slowing of MgF radicals

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Frontiers of physics 2022年第4期17卷 173-183页

作者： Kang Yan RuoXi Gu Di Wu Jin Wei Yong Xia jianping yin State Key Laboratory of Precision Spectroscopy School of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241China NYU-ECNU Institute of Physics at NYU Shanghai Shanghai 200062China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

Here we propose a scheme to slow MgF molecules by using EOM-based frequency-chirped radiation pressure *** scheme well addresses the need for a rapid chirp rate while light molecules are being laser slowed,whose scattering rate and recoil velocity are *** EOMs are used to compensate the rapidly changing Doppler shifts arised from the movement of molecules,and to cover the hyperfine energy structure of MgF,*** the scattering rate maps calculated from an optical Bloch equation model,individual molecule trajectories are simulated by using a semi-classical three-dimensional Monte Carlo *** show how the modulation configuration of EOM and the magnetic field influence the slowing *** study shows that a cryogenic buffer gas-cooled MgF beam source is possible to be slowed down with a number of∼1.4×10^(6)–10^(7),and the final forward speed peaks at∼10 m/s near the capture velocity of a molecular MOT.

关键词： laser cooling of molecule MgF molecule laser slowing dark state type-II transition

Comparative analysis of mitochondrial genome of a deepsea crab Chaceon granulates reveals positive selection and novel genetic features

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Journal of Oceanology and Limnology 2020年第2期38卷 427-437页

作者： ZHANG Bo WU yingying WANG Xin JIANG Wei yin jianping LIN Qiang Key Laboratory of Tropical Marine Bio-Resources and Ecology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510275China Institution of South China Sea Ecology and Environmental Engineering Chinese Academy of SciencesGuangzhou 510275China University of Chinese Academy of Sciences Beijing 100049China Beijing Advanced Sciences and Innovation Center of Chinese Academy of Sciences Beijing 100049China Institute of Oceanology Chinese Academy of SciencesQingdao 266071China

Deep-sea organisms survive in an extremely harsh *** must be some genetic adaptation mechanisms for *** systematically characterized and compared the complete mitochondrial genome(mitogenome)of a deep-sea crab(Chaceon granulates)with those of shallow *** mitogenome of the crab was 16126 bp in length,and encoded 37 genes as most of a metazoan mitogenome,including 13 protein-coding genes(PCGs),22 transfer RNA(tRNA)genes,and 2 ribosomal RNA(rRNA)*** gene arrangement and orientation was conserved in the ***,a unique mitogenome element regulator,the origin of light-strand replication(O L),was firstly predicted in the present crab *** addition,further positive selection analysis showed that two residues(33 S in ND3 and 502 I in ND5)in *** mitogenome were positively selected,indicated the selective evolution of the deep-sea ***,the mitogenome of deep-sea *** showed a unique OL element and positive *** special features would influence the mitochondrial energy metabolism,and be involved in the adaptation of deepsea environment,such as oxygen deficits and low temperatures.

关键词： deep-sea organisms mitochondrial genome adaptation Chaceon granulates

A driven three-dimensional electric lattice for polar molecules

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Frontiers of physics 2022年第5期17卷 175-181页

作者： Hengjiao Guo Yabing Ji Qing Liu Tao Yang Shunyong Hou jianping yin State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200062China

Three-dimensional(3D)driven optical lattices have attained great attention for their wide applications in the quest to engineer new and exotic quantum *** we propose a 3D driven electric lattice(3D-DEL)for cold polar molecules as a natural *** 3D electric lattice is composed of a series of thin metal plates in which two-dimensional square hole arrays are *** suitable modulated voltages are applied to these metal plates,a 3D potential well array for polar molecules can be generated and can move smoothly back and forth in the ***,it can drive cold polar molecules confined in the 3D electric *** analyses and trajectory calculations using two types of molecules,ND3 and PbF,are performed to justify the possibility of our *** 3D-DEL offers a platform for investigating cold molecules in periodic driven potentials,such as quantum computing science,quantum information processing,and some other possible applications amenable to the driven optical lattices.

关键词： 3D driven electric lattice cold polar molecules

Multiple Kernel Clustering Based on Self-Weighted Local Kernel Alignment

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Computers, Materials & Continua 2019年第7期61卷 409-421页

作者： Chuanli Wang En Zhu Xinwang Liu Jiaohua Qin jianping yin Kaikai Zhao College of Computer National University of Defense TechnologyChangsha410073China College of Computer and Information Engineering Central South University of Forestry and TechnologyChangsha410004China College of Computer Dongguan University of TechnologyDongguan523000China School of Informatics Computingand EngineeringIndiana UniversityIndiana47408USA

Multiple kernel clustering based on local kernel alignment has achieved outstanding clustering performance by applying local kernel alignment on each ***,we observe that most of existing works usually assume that each local kernel alignment has the equal contribution to clustering performance,while local kernel alignment on different sample actually has different contribution to clustering *** this assumption could have a negative effective on clustering *** solve this issue,we design a multiple kernel clustering algorithm based on self-weighted local kernel alignment,which can learn a proper weight to clustering performance for each local kernel ***,we introduce a new optimization variable-weight-to denote the contribution of each local kernel alignment to clustering performance,and then,weight,kernel combination coefficients and cluster membership are alternately optimized under kernel alignment *** addition,we develop a three-step alternate iterative optimization algorithm to address the resultant optimization *** experiments on five benchmark data sets have been put into effect to evaluate the clustering performance of the proposed *** experimental results distinctly demonstrate that the proposed algorithm outperforms the typical multiple kernel clustering algorithms,which illustrates the effectiveness of the proposed algorithm.

关键词： Multiple kernel clustering kernel alignment local kernel alignment self-weighted

Two types of highly efficient electrostatic traps for single loading or multi-loading of polar molecules

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Chinese Physics B 2020年第4期29卷 284-291页

作者： Bin Wei Hengjiao Guo Yabing Ji Shunyong Hou jianping yin State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200062China

Two novel electrostatic traps named octopole-based disk electrostatic trap(ODET)and tubular-based disk electrostatic trap(TDET)are proposed for trapping cold polar molecules in low-field-seeking *** MgF as the target molecule,single loading and multi-loading methods are numerically simulated with varied incident velocities of slow molecular beams in the two types of traps,*** ODET,with an incident velocity of 10 m/s,a highest loading efficiency of 78.4% or 99.9% has been achieved under the single loading or multi-loading operation *** TDET,with an incident velocity of 11 m/s,a highest loading efficiency of 81.6% or 106.5% has been achieved using the two loading methods,*** such high loading efficiencies,the trapped cold molecules can be applied in the researches of cold collisions,high precision spectroscopy,and precision ***,together with a blue-detuned hollow beam,the new electrostatic traps proposed here offer a new platform for the following gradient-intensity cooling of MgF molecules,which may provide a new way to produce high density ultracold molecules.

关键词： cold molecules electrostatic trapping Monte Carlo simulations

How to Interpret Machine Knowledge

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Engineering 2020年第3期6卷 218-220页

作者： Fashen Li Lian Li jianping yin Yong Zhang Qingguo Zhou Kun Kuang Department of Physics Lanzhou UniversityLanzhou 430000China Department of Computer Science Hefei University of TechnologyHefei 230009China Department of Computer Science Dongguan University of TechnologyDongguan 523808China Department of Physics Xiamen UniversityXiamen 361005China Department of Computer Science Lanzhou UniversityLanzhou 430000China College of Computer Science and Technology Zhejiang UniversityHangzhou 310058China

Machine knowledge refers to the knowledge contained in artificial *** article discusses how to acquire machine knowledge,with a particular focus on the acquisition of causal *** latter is the process of interpreting machine *** the analysis of certain research methods in the fields of physics and artificial intelligence,we propose principles and models for interpreting machine knowledge,and discuss specific methods including the automation of the interpretation process and local linearization.

关键词： artificial knowledge interpreting