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Chinese Automation Congress

作者： Feng Yang Haiwei Hu Litao Zheng Shaodong Chen School of Automation Northwestern Polytechnical University Ministry of Education Key Laboratory of Information Fusion Technology Xi'an P. R. China CETC Key Laboratory of Data Link Technology Xi'an P. R. China Science and Technology on Electro-optic Control Laboratory Luoyang Institute of Electro Optical Equipment of AVIC Luoyang P. R. China

To deal with the problem of ballistic reentry target trajectory tracking, a novel particle filter algorithm is proposed to mitigate the particle degeneracy. It can eliminate the inefficient particles by judging the degree of particle degradation at each time and generates new particles based on the estimation state values and their covariance according to the degeneracy ratio of particles. Compared with Standard Particle Filter (SPF) algorithm and Unscented Particle Filter (UPF) algorithm, simulation results show that the proposed algorithm can achieve better tracking performance with lower computational burden for the trajectory reentry target tracking model. Especially in the case of ballistic target maneuver, the performance stability of the proposed algorithm is even more significant.

关键词： Standard particle filter (SPF) Unscented particle filter (UPF) Ballistic reentry target trajectory tracking Particle degeneracy

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Wide-range-tunable Dirac-cone band structure in a chiral-time-symmetric non-Hermitian system

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Physical Review A 2017年第5期96卷 052121-052121页

作者： S. Lin Z. Song School of Physics Nankai University Tianjin 300071 China Science and Technology on Electro-Optical Information Security Control Laboratory Tianjin 300308 China

We establish a connection between an arbitrary Hermitian tight-binding model with chiral (C) symmetry and its non-Hermitian counterpart with chiral-time (CT) symmetry. We show that such a non-Hermitian Hamiltonian is pseudo-Hermitian. The eigenvalues and eigenvectors of the non-Hermitian Hamiltonian can be easily obtained from those of its parent Hermitian Hamiltonian. It provides a way to generate a class of non-Hermitian models with a tunable full real band structure by means of additional imaginary potentials. We also present an illustrative example that could achieve a cone structure from the energy band of a two-layer Hermitian square lattice model.

关键词： Fermi gases Discrete symmetries Schroedinger equation

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A Hyperspectral LiDAR with Eight Channels Covering from VIS to SWIR

A Hyperspectral LiDAR with Eight Channels Covering from VIS ...

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IEEE International Geoscience and Remote Sensing Symposium

作者： Zhen Wang Yuwei Chen Chuanrong Li Mi Tian Mei Zhou Wenjing He Haohao Wu Huijing Zhang Lingli Tang Yiwu Wang Hui Zhou Eetu Puttonen Juha Hyyppa Academy of Opto-Electronics (AOE) Chinese Academy of Sciences (CAS) Beijing China Key Laboratory of Quantitative Remote Sensing Information Technology Chinese Academy of Sciences (CAS) Beijing China Earth Observation Technology Application Department (ETA) Chinese Academy of Sciences (CAS) Beijing China Joint Laboratory for Electro-optical Payload Information Acquisition and Quality Control Finnish Geospatial Research Institute (FGI) Masala Finland Department of Photogrammetry and Remote Sensing Finnish Geospatial Research Institute (FGI) Masala FI Finland

Hyperspectral LiDAR (HSL) possesses the advantages of the LiDAR and the hyperspectral detection, and detects ranging and spectrum information synchronously, by one HSL system. The data fusion is also avoided. At present, the spectrum range of reported HSLs usually covers only 500 nm-1000 nm (from visual (VIS) to near infrared (NIR) band). However, there is requirement to extend the spectrum range to short wave infrared (SWIR) band, which often contains more useful spectral information. In this paper, a HSL covering the spectrum from VIS to SWIR is reported. In the HSL, the echoes are divided into two sections and are detected by the different optoelectronic devices, of which the spectral response ranges are respectively compatible to the corresponding echoes. The HSL detection experiment in the laboratory was carried out. The waveforms of the echoes were analyzed, and the spectra of different targets were measured by the HSL. The experiment results demonstrate the capability of the prototyped HSL that obtaining the ranging information and the spectrum information of the targets in VIS-SWIR bands synchronously.

关键词： Laser radar Hyperspectral imaging Geologic measurements Reflectivity Measurement by laser beam Reflection

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构建新型网络空间安全生态体系实现从网络大国走向网络强国

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Engineering 2018年第1期 105-116页

作者：杨小牛王巍许小丰庞国荣张春磊 Science and Technology on Communication Information Security Control Laboratory Science and Technology on Electro-Optical Information Security Control Laboratory

首先面向我国网络空间实际情况,提出网络空间"三分论",针对公共互联网(C空间)、党政军保密网(S空间)和关键基础设施网(K空间)三大网络空间的不同需求,给出了相应的安全应对策略和研究框架。然后重点针对公共互联网,探讨了基于... 详细信息

首先面向我国网络空间实际情况,提出网络空间"三分论",针对公共互联网(C空间)、党政军保密网(S空间)和关键基础设施网(K空间)三大网络空间的不同需求,给出了相应的安全应对策略和研究框架。然后重点针对公共互联网,探讨了基于SMCRC环(situation awareness,monitoring,cooperative defense,recovery,countermeasure)的网络空间安全生态体系的功能特点和内在信息交互方式,并分别对"SMCRC环"中态势感知、持续监控、协同防御、快速恢复、溯源反制等五大环节的核心关键技术进行了讨论,以期对国家网络空间安全研究起到抛砖引玉之作用。

关键词：网络空间安全生态体系 SMCRC环网络空间三分论

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High visibility temporal ghost imaging with classical light

arXiv

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arXiv 2017年

作者： Liu, Jianbin Wang, Jingjing Chen, Hui Zheng, Huaibin Liu, Yanyan Zhou, Yu Li, Fu-Li Xu, Zhuo Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education International Center for Dielectric Research Xi'an Jiaotong University Xi'an710049 China Science and Technology on Electro-Optical Information Security Control Laboratory MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter Department of Applied Physics Xi'an Jiaotong University Xi'an710049 China

High visibility temporal ghost imaging with classical light is possible when superbunching pseudothermal light is employed. In the numerical simulation, the visibility of temporal ghost imaging with pseudothermal light equaling (4.7 ± 0.2)% can be increased to (75 ± 8)% in the same scheme with superbunching pseudothermal light. The reasons for the difference in visibility and quality of the retrieved images in different situations are discussed in detail. It is concluded that high visibility and high quality temporal ghost image can be obtained by collecting large enough number of data points. The results are helpful to understand the difference between ghost imaging with classical light and entangled photon pairs. The superbunching pseudothermal light can be employed to improve the image quality in ghost imaging applications. Copyright © 2017, The Authors. All rights reserved.

关键词： Visibility

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Monotonic quantum-to-classical transition enabled by positively correlated biphotons

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Physical Review A 2017年第6期95卷 062341-062341页

作者： Rui-Bo Jin Guo-Qun Chen Hui Jing Changliang Ren Pei Zhao Ryosuke Shimizu Pei-Xiang Lu Laboratory of Optical Information Technology and School of Material Science and Engineering Wuhan Institute of Technology Wuhan 430205 China Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications Hunan Normal University Changsha 410081 China Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing 400714 China University of Electro-Communications 1-5-1 Chofugaoka Chofu Tokyo 182-8585 Japan

Multiparticle interference is a fundamental phenomenon in the study of quantum mechanics. It was discovered in a recent experiment [Y.-S. Ra et al., Proc. Natl. Acad. Sci. USA 110, 1227 (2013)] that spectrally uncorrelated biphotons exhibited a nonmonotonic quantum-to-classical transition in a four-photon Hong-Ou-Mandel (HOM) interference. In this work, we consider the same scheme with spectrally correlated photons. By theoretical calculation and numerical simulation, we found the transition not only can be nonmonotonic with negatively correlated or uncorrelated biphotons, but also can be monotonic with positively correlated biphotons. The fundamental reason for this difference is that the HOM-type multiphoton interference is a differential-frequency interference. Our study may shed new light on understanding the role of frequency entanglement in multiphoton behavior.

关键词： Entanglement detection Entanglement manipulation Quantum entanglement

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Agile laser beam deflection with high steering precision and angular resolution using liquid crystal optical phased array

Agile laser beam deflection with high steering precision and...

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IEEE International Nanoelectronics Conference (INEC)

作者： Xiangru Wang Shuanghong Wu Man Li School of Optoelectronic Information University of Electronic Science and Tech. of China Chengdu China Science and Technology on Electro-Optical Information Security Control Laboratory Sanhe China

To improve the steering precision and angular resolution of liquid crystal optical phased array, in this paper, we proposed a modified periodic phase controlled method to realize a continuous scanning with a constant angular resolution of less than 20 μrad, meanwhile, its precision is less than 5 μrad (RMS). Also, another method we proposed is called sub-aperture coherence can realize even better angular resolution less than 5 μrad which is the limitation of our measurement instrument.

关键词： Measurement by laser beam Laser beams Phased arrays optical arrays Coherence Laser theory Laser radar

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Monotonic quantum-to-classical transition enabled by positively-correlated biphotons

arXiv

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arXiv 2017年

作者： Jin, Rui-Bo Chen, Guo-Qun Jing, Hui Ren, Changliang Zhao, Pei Shimizu, Ryosuke Lu, Pei-Xiang Laboratory of Optical Information Technology School of Material Science and Engineering Wuhan Institute of Technology Wuhan430205 China Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Department of Physics Synergetic Innovation Center for Quantum Effects and Applications Hunan Normal University Changsha410081 China Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing400714 China University of Electro-Communications 1-5-1 Chofugaoka Chofu Tokyo182-8585 Japan

Multiparticle interference is a fundamental phenomenon in the study of quantum mechanics. It was discovered in a recent experiment [Ra, Y.-S. et al, Proc. Natl Acad. Sci. USA 110, 1227(2013)] that spectrally uncorrelated biphotons exhibited a nonmonotonic quantum-to-classical transition in a four-photon Hong-Ou-Mandel (HOM) interference. In this work, we consider the same scheme with spectrally correlated photons. By theoretical calculation and numerical simulation, we found the transition not only can be nonmonotonic with negative-correlated or uncorrelated biphotons, but also can be monotonic with positive-correlated biphotons. The fundamental reason for this difference is that the HOM-type multi-photon interference is a differential-frequency interference. Our study may shed new light on understanding the role of frequency entanglement in multi-photon behavior. Copyright © 2017, The Authors. All rights reserved.

关键词： Photons

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Mid-infrared ZnGeP2 optical parametric oscillator pumped by Tm:YAlO3 laser

Mid-infrared ZnGeP2 optical parametric oscillator pumped by ...

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作者： Wang, Lixin Zhang, Xiaojuan Xu, Hong School of Electro-Optical Beijing Institute of Technology Beijing100081 China Science and Technology on Electro-Optical Information Security Control Laboratory Sanhe065201 China

We report experimental results on a mid-infrared (mid-IR) ZnGeP2 optical parametric oscillator (OPO) pumped by a thulium laser. A high efficient Q-switched a-cut Tm:YAlO3 (Tm:YAP) laser was used to directly drive a ZnGeP2 OPO to generate 3-5 μm wavelength range. The diode pumped Tm:YAP laser operated on 1.99 μm at 10 kHz repetition rate, and its optical-tooptical conversion efficiency was 22.2%. The laser was run with room temperature components and achieved nearly 2 W average output power at 3-5 μm region with an efficiency of 5.5% starting from the pump diode. The influences of curvature and reflectivity of OPO output mirror on laser output are analysed and validated by experiments, and the results have benefit for the optimisation of such lasers. Copyright © 2015 Inderscience Enterprises Ltd.

关键词： optical parametric oscillators

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GB-RC4: Effective brute force attacks on RC4 algorithm using GPU 7

GB-RC4: Effective brute force attacks on RC4 algorithm using...

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7th International Green and Sustainable Computing Conference, IGSC 2016

作者： Xue, Pei Li, Tao Dong, Han Liu, Chunbo Ma, Wenjing Pei, Songwen College of Computer and Control Engineering Nankai University Tianjin300071 China Information Security Evaluation Center Civil Aviation University of China Tianjin300300 China Laboratory of Parallel Software and Computational Science State Key Laboratory of Computing Science Institute of Software CAS Beijing China Shanghai Key Lab of Modern Optical Systems Department of Computer Science and Engineering University of Shanghai for Science and Technology Shanghai200093 China

ISBN: (纸本)9781509051175

Encryption algorithms are applied to a variety of fields and the security of encryption algorithms depends heavily on the computational infeasibility of exhaustive key-space search. RC4 algorithm has an extensive application for stream encryption, however, the disadvantages of traditional RC4 serial algorithm are large computational quantity and slow computation speed, which means a great challenge for throughput of computing system. Graphics processors recently have been widely used as accelerators for high throughput computing. In this paper, GPU is used to improve the efficiency and performance of attacking RC4 algorithm. First, we revised RC4 algorithm to make it easier to parallelize on a GPU. Then we take advantage of constant memory and shared memory in GPU to search the key space of RC4 algorithm efficiently. Besides, we solved the bank conflict problem in shared memory to further improve the performance. Our approach was evaluated in the whole key space of 40-bit, and the results show it can complete searching of the whole key space within 12.8 hours. © 2016 IEEE.

关键词： Graphics processing unit

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