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| 1 | Programmable time-domain digital-coding metasurface for non-linear harmonic manipulation and new wireless communication systems显示文摘Optical non-linear phenomena are typically observed in natural materials interacting with light at high intensities, and they benefit a diverse range of applications from communication to sensing. However,controlling harmonic conversion with high efficiency and flexibility remains a major issue in modern optical and radio-frequency systems. Here, we introduce a dynamic time-domain digital-coding metasurface that enables efficient manipulation of spectral harmonic distribution. By dynamically modulating the local phase of the surface reflectivity, we achieve accurate control of different harmonics in a highly programmable and dynamic fashion, enabling unusual responses, such as velocity illusion. As a relevant application, we propose and realize a novel architecture for wireless communication systems based on the time-domain digital-coding metasurface, which largely simplifies the architecture of modern communication systems, at the same time yielding excellent performance for real-time signal transmission. The presented work, from new concept to new system, opens new pathways in the application of metamaterials to practical technology. | Jie Zhao Xi Yang Jun Yan Dai Qiang Cheng Xiang Li Ning Hua Qi Jun Chen Ke Guo Dong Bai Shuo Liu Shi Jin Andrea Alù Tie Jun Cui | 2019 | National Science Review2019，6，2： | 46 |
| 2 | 基于AHP的威胁评估与排序模型研究显示文摘层次分析法(AnalyticHierarchyProcess,简称AHP)把一个复杂问题表示为有序的递阶层次结构,通过定性判断和定量计算,将经验判断给予量化,对决策方案进行排序,是一种定性分析与定量分析相结合的决策分析方法,适用于多准则决策问题。通过仿真实验用AHP根据威胁程度的大小对敌空袭目标进行排序,介绍了威胁评估和排序的求解过程,以此提供敌空袭目标对我保卫目标或区域所构成的威胁等级。该方法有效地解决了对敌空中目标威胁评估与排序问题。 | 唐雪松 郭立红 陈长喜 | 2006 | 微计算机信息2006，，09X： | 31 |
| 3 | Revisiting the security of quantum dialogue and bidirectional quantum secure direct communication显示文摘From the perspective of information theory and cryptography,the security of two quantum dialogue protocols and a bidirectional quantum secure direct communi-cation(QSDC) protocol was analyzed,and it was pointed out that the transmitted information would be partly leaked out in them.That is,any eavesdropper can elicit some information about the secrets from the public annunciations of the legal us-ers.This phenomenon should have been strictly forbidden in a quantum secure communication.In fact,this problem exists in quite a few recent proposals and,therefore,it deserves more research attention in the following related study. | GAO Fei GUO FenZhuo WEN QiaoYan ZHU FuChen | 2008 | Science China(Physics,Mechanics & Astronomy)2008，51，5： | 28 |
| 4 | CM-MAC:一种基于分簇的多信道车载网MAC协议显示文摘车载网VANET是一种应用于智能交通系统的新型无线移动自组织网络(mobile ad hoc network,MANET).随着车辆以及移动ad hoc网络技术的发展,车载网已经成为一个新兴的研究领域.针对VANET中车辆行驶的特征,提出一种拓扑相对稳定的车辆分簇算法.在此算法基础上,根据专用短程通信(dedicated short range communication,DSRC)标准中控制信道(control channel,CCH)和服务信道(service channel,SCH)的分配,考虑车辆间的无线通信干扰和不同应用的QoS需求,提出一种基于分簇的多信道混合型MAC协议,簇内通信采用非竞争的TDMA机制,簇间通信采用基于竞争的CSMA?CA机制,相邻簇采用不同的服务信道.模拟实验表明,提出的MAC协议在同时满足实时应用的延迟需求和非实时应用的吞吐量方面,优于现有协议. | 何鹏 阎保平 李志 孙利民 | 2014 | 计算机研究与发展2014，51，3： | 27 |
| 5 | 基于Android的智能家居终端控制系统显示文摘为了更好地满足用户对生活居住需求,给用户提供更好的对智能家用电器的控制体验,提升家居生活质量,基于Android的手机平台和平板电脑,设计了基于Android的智能家居终端控制系统。该系统建立在Android平台上,利用Android系统支持的各种资源建立并实现。用户可以使用智能手机实现对智能家用电器的远程控制。该系统成本低,操作灵活,界面友好,经实际使用获得了很好的用户体验。 | 董立岩 隋鹏 辛晓华 田耕 | 2014 | 吉林大学学报(信息科学版)2014，32，3： | 23 |
| 6 | Fairness-Oriented Hybrid Precoding for Massive MIMO Maritime Downlink Systems with Large-Scale CSIT显示文摘Different from conventional cellular networks, a maritime communication base station(BS) has to cover a much wider area due to the limitation of available BS sites. Accordingly the performance of users far away from the BS is poor in general. This renders the fairness among users a challenging issue for maritime communications. In this paper, we consider a practical massive MIMO maritime BS with hybrid digital and analog precoding. Only the large-scale channel state information at the transmitter(CSIT) is considered so as to reduce the implementation complexity and overhead of the system. On this basis, we address the problem of fairness-oriented precoding design. A max-min optimization problem is formulated and solved in an iterative way. Simulation results demonstrate that the proposed scheme performs much better than conventional hybrid precoding algorithms in terms of minimum achievable rate of all the users, for the typical three-ray maritime channel model. | Chengxiao Liu Wei Feng Te Wei Ning Ge | 2018 | China Communications2018，15，1： | 23 |
| 7 | Wireless Communications with Programmable Metasurface:Transceiver Design and Experimental Results显示文摘Metasurfaces have drawn significant attentions due to their superior capability in tailoring electromagnetic waves with a wide frequency range, from microwave to visible light. Recently, programmable metasurfaces have demonstrated the ability of manipulating the amplitude or phase of electromagnetic waves in a programmable manner in real time, which renders them especially appealing in the applications of wireless communications. In this paper, we present the fundamental principle of applying programmable metasurface as transmitter for wireless communications. Then, we establish a prototype system of metasurface-based transmitter to conduct several experiments and measurements over the air, which practically demonstrate the feasibility of using programmable metasurfaces in future communication systems. By exploiting the dynamically controllable property of programmable metasurface, the design, implementation and experimental evaluation of the proposed metasurface-based wireless communication system are presented with the prototype, which realizes single carrier quadrature phase shift keying(QPSK) transmission over the air. In the developed prototype, the phase of the reflected electromagnetic wave of programma-ble metasurface is directly manipulated in real time according to the baseband control signal, which achieves 2.048 Mbps data transfer rate with video streaming transmission over the air. In addition, experimental result is provided to compare the performance of the proposed metasurface-based architecture against the conventional one. With the slight increase of the transmit power by 5 dB, the same bit error rate(BER) performance can be achieved as the conventional system in the absence of channel coding. Such a result is encouraging considering that the metasurface-based system has the advantages of low hardware cost and simple structure, thus leading to a promising new architecture for wireless communications. | Wankai Tang Xiang Li Jun Yan Dai Shi Jin Yong Zeng Qiang Cheng Tie Jun Cui | 2019 | China Communications2019，16，5： | 23 |
| 8 | 从传播到“传联”:一个新概念提出的学理依据、现实背景与理论内涵显示文摘本文尝试提出'传联'这一新概念,认为'传联'即'传递/传播+联接/联系'——在联接的状态下,通过信息的传递与传播在不同主体之间建立联系;通过不同主体之间的联系使信息得以更好地传递与传播。提出'传联'概念的价值,在学理层面是为了回归'communication'的本义('交流、共享、与他人建立联系')和'媒介'的本质('不同主体之间关系的建构者');在现实层面则能更好地回应当今时代'以信息技术为代表的新一轮科技革命'所引发的传媒变局与社会变革。基于此,本文进而尝试对'传联'的内涵、外延进行界定与阐释,并指出'事物是普遍联系的'这一唯物辩证法的基本原理既是'传联'这一概念在理论上进行创新的源泉,也是其哲学价值的归宿。 | 喻发胜 张振宇 黄海燕 | 2017 | 新闻大学2017，，2： | 21 |
| 9 | The principle of the positioning system based on communication satellites显示文摘It is a long dream to realize the communication and navigation functionality in a satellite system in the world. This paper introduces how to establish the system, a positioning system based on communication satellites called Chinese Area Positioning System (CAPS). Instead of the typical navigation satellites, the communication satellites are configured firstly to transfer navigation signals from ground stations, and can be used to obtain service of the positioning, velocity and time, and to achieve the function of navigation and positioning. Some key technique issues should be first solved; they include the accuracy position determination and orbit prediction of the communication satellites, the measur- ing and calculation of transfer time of the signals, the carrier frequency drift in communication satellite signal transfer, how to improve the geometrical configuration of the constellation in the system, and the integration of navigation & communication. Several innovative methods are developed to make the new system have full functions of navigation and communication. Based on the development of crucial techniques and methods, the CAPS demonstration system has been designed and developed. Four communication satellites in the geosynchronous orbit (GEO) located at 87.5°E, 110.5°E, 134°E, 142°E and barometric altimetry are used in the CAPS system. The GEO satellites located at 134°E and 142°E are decommissioned GEO (DGEO) satellites. C-band is used as the navigation band. Dual frequency at C1=4143.15 MHz and C2=3826.02 MHz as well as dual codes with standard code (CA code and precision code (P code)) are adopted. The ground segment consists of five ground stations; the master station is in Lintong, Xi’an. The ground stations take a lot of responsibilities, including monitor and management of the operation of all system components, determination of the satellite position and prediction of the satellite orbit, accomplishment of the virtual atomic clock measurement, transmission and receiving navigation signals to and from each satellite. In the north, the south, the east, the west and the center of Chinese main land, the function of CAPS demonstration system is checked and measured. In cars and on board the system is also checked and measured. The results are as follow: CA-code, horizontal positioning accuracy, 15-25 m (1σ), vertical, 1-3 m; P-code, horizontal positioning accuracy, 8-10 m (1σ), vertical, 1-3 m; velocity accuracy, CA-code, 0.13-0.30 m/s, P-code, 0.15-0.17 m/s; time accuracy, CA-code, 160 ns, P-code, 13 ns; determination accuracy of orbit ≤2 m. About 20 million US $ and two years are spent for the development of demonstration. A complete CAPS system is now being established. | AI GuoXiang SHI HuLi WU HaiTao LI ZhiGang GUO Ji | 2009 | Science China(Physics,Mechanics & Astronomy)2009，52，3： | 21 |
| 10 | Quantum secure direct communication with cluster states显示文摘A quantum secure direct communication protocol with cluster states is proposed.Compared with the deterministic secure quantum communication protocol with the cluster state proposed by Yuan and Song(Int.J.Quant.Inform.,2009,7:689),this protocol can achieve higher intrinsic efficiency by using two-step transmission.The implementation of this protocol is also discussed. | CAO WeiFeng 1,YANG YuGuang 3,4,5* & WEN QiaoYan 2 1 College of Electric and Information Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China 2 State Key Laboratory of Networking and Switching Technology,Beijing University of Posts and Telecommunications,Beijing 100876,China 3 College of Computer Science and Technology,Beijing University of Technology,Beijing 100124,China 4 State Key Laboratory of Integrated Services Network,Xidian University,Xi’an 710071,China 5 State key Laboratory of Information Security Gradute University of Chinese Academy of Sciences,Beijing 100049,China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，7： | 20 |
| 11 | Deterministic secure quantum communication over a collective-noise channel显示文摘We present two deterministic secure quantum communication schemes over a collective-noise. One is used to complete the secure quantum communication against a collective-rotation noise and the other is used against a collective-dephasing noise. The two parties of quantum communication can exploit the correlation of their subsystems to check eavesdropping efficiently. Although the sender should prepare a sequence of three-photon entangled states for accomplishing secure communication against a collective noise,the two parties need only single-photon measurements,rather than Bell-state measurements,which will make our schemes convenient in practical application. | GU Bin PEI ShiXin SONG Biao ZHONG Kun | 2009 | Science China(Physics,Mechanics & Astronomy)2009，52，12： | 20 |
| 12 | Measurement-device-independent quantum communication without encryption显示文摘Security in communication is vital in modern life. At present, security is realized by an encryption process in cryptography. It is unbelievable if a secure communication is achievable without encryption. In quantum cryptography, there is a unique form of quantum communication, quantum secure direct communication, where secret information is transmitted directly over a quantum channel. Quantum secure direct communication is drastically distinct from our conventional concept of secure communication, because it does not require key distribution, key storage and ciphertext transmission, and eliminates the encryption procedure completely. Hence it avoids in principle all the security loopholes associated with key and ciphertext in traditional secure communications. For practical implementation, defects always exist in real devices and it may downgrade the security. Among the various device imperfections, those with the measurement devices are the most prominent and serious ones. Here we report a measurementdevice-independent quantum secure direct communication protocol using Einstein-Podolsky-Rosen pairs. This protocol eradicates the security vulnerabilities associated with the measurement device,and greatly enhances the practical security of quantum secure direct communication. In addition to the security advantage, this protocol has an extended communication distance, and a high communication capacity. | Peng-Hao Niu Zeng-Rong Zhou Zai-Sheng Lin Yu-Bo Sheng Liu-Guo Yin Gui-Lu Long | 2018 | Science Bulletin2018，63，20： | 19 |
| 13 | Quasi-secure quantum dialogue using single photons显示文摘A quasi-secure quantum dialogue protocol using single photons was proposed. Different from the previous entanglement-based protocols, the present protocol uses batches of single photons which run back and forth between the two parties. A round run for each photon makes the two parties each obtain a classical bit of information. So the efficiency of information transmission can be increased. The present scheme is practical and well within the present-day technology. | YANG YuGuang1,2 & WEN QiaoYan31 College of Computer Science and Technology, Beijing University of Technology, Beijing 100022, China 2 State Key Laboratory of Information Security, Graduate University of the Chinese Academy of Sciences, Beijing 100049, China 3 School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China | 2007 | Science China(Physics,Mechanics & Astronomy)2007，50，5： | 18 |
| 14 | Design of integrated radar and communication system based on MIMO-OFDM waveform显示文摘Orthogonal frequency division multiplexing(OFDM)waveform enables radar and communication functions simultaneously, which encounters low angle resolution and poor data rate for traditional single input single output(SISO) systems. To solve these problems, an integrated radar and communication system(IRCS) with multiple input multiple output(MIMO) OFDM waveform is proposed. The different limitations of radar and communication in designing such a system are investigated. Then, an optimization problem is devised to obtain suitable system parameters, including the number of subcarriers, subcarrier spacing, number of symbols,pulse repetition frequency(PRF) and length of cyclic prefix(CP).Finally, to satisfy the requirements of both radar and communication, the IRCS parameters are derived in three typical cases.Several numerical results are presented to illustrate the demands of radar and communication, inconsistent or consistent, for the IRCS parameters and the superiority of the proposed system. | Yongjun Liu Guisheng Liao Zhiwei Yang Jingwei Xu | 2017 | Journal of Systems Engineering and Electronics2017，28，4： | 16 |
| 15 | Research on network integration technology of observation stations显示文摘According to the phenomenon of 'four more'and'four low 'problems in the observation stations,the surface-based meteorological observing system can't adapt to the change of the adaptive observation equipment and reduce of business intensification. A station integrated system is proposed,w hich can be configured,connected and extended to all kinds of observation equipment. And the integrated processor is designed,supporting a variety of communication interface standards. Flexible configuration,connection and expansion betw een conventional and new type of meteorological observation equipment are supported. It is capable for online calibration and maintenance of observation equipment. The effectiveness of automatic observation equipment is totally achieved to provide basic information support for disaster prevention and mitigation and national economic development. | ZHAN Yanjun MA Shangchang ZHUANG Ting ZHANG Sujuan | 2015 | Instrumentation2015，2，3： | 15 |
| 16 | 中美新闻传播学研究方法比较——以2000-2009年《新闻与传播研究》和《Jounal of Communication》为例显示文摘在科学研究中,研究方法在某种意义上比研究对象和结论更为重要。本文采用内容分析法,对《新闻与传播研究》与《Journal of Communication》2000-2009年十年的学术论文进行研究,探寻两国在新闻传播学研究方法上的差异。研究发现,我国的新闻传播学研究在采用定量研究方法方面有待加强,且在数据的精确性和研究的规范性上有待改进。 | 董天策 昌道励 | 2010 | 西南民族大学学报(人文社会科学版)2010，31，7： | 14 |
| 17 | Germanium/perovskite heterostructure for high-performance and broadband photodetector from visible to infrared telecommunication band显示文摘A high-performance and broadband heterojunction photodetector has been successfully fabricated.The heterostructure device is based on a uniform and pinhole-free perovskite film constructed on top of a single-crystal germanium layer.The perovskite/germanium photodetector shows enhanced performance and a broad spectrum compared with the single-material-based device.The photon response properties are characterized in detail from the visible to near-infrared spectrum.At an optical fibre communication wavelength of 1550 nm,the heterojunction device exhibits the highest responsivity of 1.4 A/W.The performance is promoted because of an antireflection perovskite coating,the thickness of which is optimized to 150 nm at the telecommunication band.At a visible light wavelength of 680 nm,the device shows outstanding responsivity and detectivity of 228 A/W and 1.6×10^(10) Jones,respectively.These excellent properties arise from the photoconductive gain boost in the heterostructure device.The presented heterojunction photodetector provides a competitive approach for wide-spectrum photodetection from visible to optical communication areas.Based on the distinguished capacity of light detection and harvesting from the visible to near-infrared spectrum,the designed germanium/perovskite heterostructure configuration is believed to provide new building blocks for novel optoelectronic devices. | Wei Hu Hui Cong Wei Huang Yu Huang Lijuan Chen Anlian Pan Chunlai Xue | 2019 | Light(Science & Applications)2019，8，1： | 14 |
| 18 | Three-dimensional finite-time cooperative guidance for multiple missiles without radial velocity measurements显示文摘In order to simultaneously attack a target with impact angle constraint in threedimensional(3-D) space, a novel distributed cooperative guidance law for multiple missiles under directed communication topologies is proposed without radial velocity measurements. First, based on missiles-target 3-D relative motion equations, the multiple missiles cooperative guidance model with impact angle constraint is constructed. Then, in Line-of-Sight(LOS) direction, based on multiagent system cooperative control theory, one guidance law with directed topologies is designed with strict proof, which can guarantee finite time consensus of multiple missiles' impact times. Next, in elevation direction and azimuth direction of LOS, based on homogeneous system stability theory and integral sliding mode control theory, two guidance laws are proposed respectively with strict proof, which can guarantee LOS angles converge to desired values and LOS angular rates converge to zero in finite time. Finally, the effectiveness of the designed cooperative guidance law is demonstrated through simulation results. | Teng LYU Chuanjiang LI Yanning GUO Guangfu MA | 2019 | Chinese Journal of Aeronautics2019，32，5： | 14 |
| 19 | A Comprehensive Overview of Cyber-Physical Systems: From Perspective of Feedback System显示文摘Cyber-physical systems(CPS) are characterized by integrating cybernetic and physical processes. The theories and applications of CPS face the enormous challenges. The aim of this paper is to provide a latest understanding of this emerging multi-disciplinary methodology. First, the features of CPS are described, and the research progresses are summarized from different components in CPS, such as system modeling,information acquisition, communication, control and security.Each part is also followed by the future directions. Then some typical applications are given to show the prospects of CPS. | Xinping Guan Bo Yang Cailian Chen Wenbin Dai Yiyin Wang | 2016 | IEEE/CAA Journal of Automatica Sinica2016，3，1： | 14 |
| 20 | 基于虚拟链路交换式以太网的列车通信网络可靠性分析显示文摘随着轨道交通技术的不断发展,列车通信网络中需要传输的数据类型和数据量日益增大,传统列车通信网络的带宽难以满足要求。本文提出一种基于虚拟链路的环形交换式以太网解决方案,通过流量整形和虚拟链路调度技术可以保证每个BAG间隔内只有不超过一个帧在使用虚拟链路,可避免传统以太网对介质访问存在的碰撞问题,保证数据传输的确定性。为进一步探讨该网络的实时性,本文采用边扩张二元决策图EEBDD(Edge Expansion Binary Decision Diagram)算法分析该网络中的单条虚拟链路、多条虚拟链路以及全部虚拟链路的连通可靠性与及时可靠性,并通过网络仿真研究证实了本方案应用于列车通信网络的可行性。 | 周洁琼 王立德 王涛 申萍 | 2014 | 铁道学报2014，36，2： | 13 |
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