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| 1 | Coding metamaterials, digital metamaterials and programmable metamaterials显示文摘Metamaterials are artificial structures that are usually described by effective medium parameters on the macroscopic scale,and these metamaterials are referred to as‘analog metamaterials’.Here,we propose‘digital metamaterials’through two steps.First,we present‘coding metamaterials’that are composed of only two types of unit cells,with 0 and p phase responses,which we name‘0’and‘1’elements,respectively.By coding‘0’and‘1’elements with controlled sequences(i.e.,1-bit coding),we can manipulate electromagnetic(EM)waves and realize different functionalities.The concept of coding metamaterials can be extended from 1-bit coding to 2-bit coding or higher.In 2-bit coding,four types of unit cells,with phase responses of 0,p/2,p,and 3p/2,are required to mimic the‘00’,‘01’,‘10’and‘11’elements,respectively.The 2-bit coding has greater freedom than 1-bit coding for controlling EM waves.Second,we propose a unique metamaterial particle that has either a‘0’or‘1’response controlled by a biased diode.Based on this particle,we present‘digital metamaterials’with unit cells that possess either a‘0’or‘1’state.Using a field-programmable gate array,we realize digital control over the digital metamaterial.By programming different coding sequences,a single digital metamaterial has the ability to manipulate EM waves in different manners,thereby realizing‘programmable metamaterials’.The above concepts and physical phenomena are confirmed through numerical simulations and experiments using metasurfaces. | Tie Jun Cui Mei Qing Qi Xiang Wan Jie Zhao Qiang Cheng | 2014 | Light(Science & Applications)2014，3，1： | 130 |
| 2 | 基于DSP与FPGA的变流器通用控制平台研究显示文摘提出一种基于DSP和现场可编程门阵列(FPGA)双CPU结构的新型变流器控制系统方案,其中DSP完成变流器控制策略的实现,主要包括:最大功率点跟踪、电压电流双闭环控制、低电压穿越控制、通信功能;FPGA完成三相锁相环控制、AD芯片采样控制、SVPWM波形控制、逻辑输出控制以及各类故障信号检测与停机保护功能,并采用了基于WIFI模块的风电故障信息传输系统。以双馈风电变流器为模型,设计了双馈风力发电变流器系统,完成了两电平与三电平SVPWM控制算法的FPGA实现。最后在自主研发的1.5 MW,2 MW双馈式变流器样机与光伏逆变器样机上进行了大量实验和长期的现场试运行,验证了控制系统平台的可行性与实用性。 | 郭巍 肖遥 孙永佳 | 2014 | 电气传动2014，44，2： | 14 |
| 3 | ZFN,TALEN and CRISPR-Cas9 mediated homology directed gene insertion in Arabidopsis:A disconnect between somatic and germinal cells显示文摘Breakthroughs in the generation of programmable sequencespecific nucleases (SSNs),such as zinc finger nucleases (ZFNs), TAL effector nucleases (TALENs)and the RNA-directed nuclease CRISPR-associated protein 9 (Cas9),have greatly increased the ease of plant genome engineering (Voytas,2013;Malzahn et al., 2017).Programmable SSNs introduce a DNA double-strand break (DSB)at a target site in the genome that must be repaired by one of several endogenous DNA repair pathways. | Qiwei Shan Nicholas J.Baltes Paul Atkins Elida R. Kirkland Yong Zhang Joshua A.Ballet Levi G.Lowder Aimee A.Malzahn John C.Haugner Ⅲ Burckhard Seelig Daniel F. Voytas Yiping Qi | 2018 | Journal of Genetics and Genomics2018，45，12： | 9 |
| 4 | 造纸机PLC程序的结构化设计研究显示文摘针对工程实践中造纸机PLC控制程序存在设计效率低、通用性不强等特点,提出运用软件工程方法对其进行标准化设计。通过分析造纸机多分部传动控制的特点,采用结构化方法进行需求分析和程序设计。实践验证,该方法应用在造纸机上是可行的,且能提高程序的设计效率和通用性。软件工程的软件设计方法在工业控制领域的应用具有很好的前景。 | 孟彦京 薛宁 | 2014 | 自动化仪表2014，35，3： | 7 |
| 5 | Microwave metamaterials: from exotic physics to novel information systems显示文摘Metamaterials and metasurfaces have attracted much attention due to their powerful ability to control electromagnetic(EM)waves.In this paper,we review the recent developments in the field of EM metamaterials,starting from their exotic physics to their applications in novel information systems.First,we show the fundamental understanding on traditional metamaterials based on the effective medium theory and related applications,such as invisibility cloaks and meta-lenses.Second,we review the two-dimensional versions of metamaterials,i.e.,metasurfaces,for controlling spatial waves and surface waves and thereafter present their typical designs.In particular,we briefly introduce spoof surface plasmon polaritons and their applications in microwave frequencies.Following the above approach,we emphatically present the concepts of digital coding metamaterials,programmable metamaterials,and information metamaterials.By extending the principles of information science to metamaterial designs,several functional devices and information systems are presented,which enable digital and EM-wave manipulations simultaneously.Finally,we give a brief summary of the development prospects for microwave metamaterials. | Rui-yuan WU Tie-jun CUI | 2020 | Frontiers of Information Technology & Electronic Engineering2020，21，1： | 7 |
| 6 | 基于PLCopen标准的运动控制系统设计显示文摘基于PLCopen标准,结合PLC(可编程逻辑控制器)编程和运动控制编程,设计并实现了一种运动控制器.此运动控制器采用PLCopen标准定义的功能块模块模型,一方面达到了PLCopen标准定义的运动控制要求,另一方面实现了运动控制器的图形化编程模式.为了满足PLCopen定义的功能块模式的变换,在研究PLCopen标准定义的模块间关系基础上,设计了一种打断锁,通过对打断锁的操作,实现了PLCopen标准定义的模块间不同模式的交互方式.最后,在基于Beremiz开源开发平台上,以单轴模块验证了运动控制系统的可行性. | 王翰 宋宝 唐小琦 | 2014 | 华中科技大学学报(自然科学版)2014，42，1： | 5 |
| 7 | SRAM型FPGA单粒子辐照试验系统技术研究显示文摘单粒子辐射效应严重制约FPGA的空间应用,为提高FPGA在辐射环境中的可靠性,深入研究抗辐射加固FPGA单粒子效应评估方法,设计优化单粒子效应评估方案,开发相应的评估系统,提出基于SRAM时序修正的码流存储比较技术和基于SelectMAP端口配置回读技术。借助国内高能量大注量率的辐照试验环境,完成FPGA单粒子翻转(SEU)、单粒子闩锁(SEL)和单粒子功能中断(SEFI)等单粒子效应的检测,试验结果表明,该方法可以科学有效地对SRAM型FPGA抗单粒子辐射性能进行评估。 | 孙雷 段哲民 刘增荣 陈雷 | 2014 | 计算机工程与应用2014，50，1： | 5 |
| 8 | FPGA-based high resolution DPWM control circuit显示文摘Two improved structures of high resolution digital pulse width modulator(DPWM) control circuit are proposed. Embedded digital clock manager(DCM) blocks and digital programmable delay circuits are employed as the basic resources to construct the field-programmable gate array(FPGA)-based DPWM implementations. Detailed schemes are illustrated and the circuits have been successfully implemented on the Artix-7 FPGA device developed by Xilinx. Experimental results show that when the basic clock operates at the frequency of 200 MHz, the resolutions of the two approaches can reach 625 ps and 500 ps, respectively. Besides,the presented schemes possess other merits including flexible resolution, strong versatility and relatively good stability. | SONG Hu JIANG Naiti HU Shanshan LI Hongtao | 2018 | Journal of Systems Engineering and Electronics2018，29，6： | 5 |
| 9 | 一款基于新型Field Programmable Gate Array芯片的投影仪梯形校正系统研究与实现显示文摘投影设备配备的梯形校正普遍存在校正范围小,画面的一些线条和字符边缘会出现毛刺和不平滑现象,矫正效果不理想.如果采用通用的图像处理芯片和复杂的算法,可以解决上述问题,但又会导致成本急剧上升.为了解决上述矛盾,提出一种基于FPGA(Field Programmable Gate Array)芯片的新型梯形校正实现方案,解决了校正范围与锯齿失真的矛盾问题,并为进一步成为芯片级产品铺平了道路.图像处理采用kaiser窗函数和sinc函数相结合的方法进行插值,这样的滤波器改善了旁瓣抑制,具有较好的通带性能.介绍了梯形失真的产生和校正原理,提出了利用FPGA芯片XC3S400作为核心图像处理单元的梯形校正系统的硬件和软件实现,说明了该芯片结构、功能及特性,最后提供了校正的效果图. | 曹凤莲 沈庆宏 盛任农 高敦堂 | 2006 | 南京大学学报(自然科学版)2006，42，4： | 5 |
| 10 | 基于数学形态学的红外点目标实时检测算法及其CPLD实现显示文摘基于数学形态学提出了一种红外图像序列中点目标的检测算法及其硬件系统的实现 .首先介绍了基于数学形态学的点目标检测算法的基本原理 ,然后根据算法的特点提出了它在CPLD上的并行流水线实现方法 ,最后给出并分析了算法软件和硬件系统的仿真结果 .结果表明该方法可以快速、可靠地检测出低信杂比红外图像序列中的点目标 ,且系统结构简单 ,无需存储器 。 | 刘士建 郭立 段勃 朱俊株 | 2004 | 中国科学技术大学学报2004，34，3： | 5 |
| 11 | 基于PFGA的步进电机PWM发生器设计显示文摘分析并设计了一种脉冲宽度调制(PWM)占空比序列实现步进电机正弦波电流驱动的方法。根据PWM基本原理和步进电机正弦波细分驱动的模式,对PWM计算公式进行了推导,得到了两种不同的计算方法,并得出占空比数据,二进制整数化后得到适合于二进制数字系统的整数化占空比数据序列。同时在Matlab中对PWM驱动方式进行建模、仿真、分析,得到二进制整数化占空比数据序列。对计算、仿真两种结果进行了比较,一致性很好。同时在现场可编程门阵列(FPGA)中设计了占空比序列PWM发生器,利用直接数字频率合成(DDS)选择不同频率的方波,实现步进电机细分数量的任意可调。 | 姜圣广 张卫东 | 2014 | 电气传动2014，44，2： | 4 |
| 12 | Implementation of encoder and decoder for LDPC codes based on FPGA显示文摘This paper proposes a parallel cyclic shift structure of address decoder to realize a high-throughput encoding and decoding method for irregular-quasi-cyclic low-density parity-check(IR-QC-LDPC)codes,with a dual-diagonal parity structure.A normalized min-sum algorithm(NMSA)is employed for decoding.The whole verification of the encoding and decoding algorithm is simulated with Matlab,and the code rates of 5/6 and 2/3 are selected respectively for the initial bit error ratio as 6%and 1.04%.Based on the results of simulation,multi-code rates are compatible with different basis matrices.Then the simulated algorithms of encoder and decoder are migrated and implemented on the field programmable gate array(FPGA).The 183.36 Mbps throughput of encoder and the average 27.85 Mbps decoding throughput with the initial bit error ratio 6%are realized based on FPGA. | CHENG Kun SHEN Qi LIAO Shengkai PENG Chengzhi | 2019 | Journal of Systems Engineering and Electronics2019，30，4： | 4 |
| 13 | 基于DSP的HPI与主机通信的实现显示文摘本文介绍利用TMS320VC5402中主机接口HPI实现与主机通信,不需要增加太多额外的硬件设备和软件开销,外部主机通过HPI口对DSP系统的RAM进行访问,不会影响DSP的其它处理过程。实现了一种TMS320VC5402DSP与AT89C51单片机通信的硬件连接方案和软件实现方法,给出了部分程序代码。实验结论证明这种方案可行、有效,对于一些复杂系统的设计具有很好的借鉴意义。 | 崔丽珍 李伟 | 2008 | 微计算机信息2008，24，24： | 4 |
| 14 | 空间太阳望远镜的图象预处理系统研制显示文摘空间太阳望远镜太阳磁场测量要求图象的信噪比为104.受CCD满阱电荷的限制,必须对CCD采集到的图象,在预处理单元进行图象积分以提高信噪比;为了减小CCD引入的噪声,还采用了CCD图象改正技术;对于宁静态的长时间太阳观测,为了克服图象漂移导致无法进行图象积分的难题,提出了图象相关内插累加技术,来进一步提高信噪比;预处理单元还担负着偏振测量中的Stokes参数归一计算、CCD控制、调焦控制和图象格式化等任务.文中分析了预处理系统的处理功能需求,确定了系统设计方案;采用FPGA加DSP的硬件结构,制作了地面原理样机,开发了系统软件.在地面支持设备上对系统功能进行了仿真和测试. | 王宇舟 金声震 | 2005 | 电子学报2005，33，7： | 4 |
| 15 | 基于CPLD的两主机间的双向通信接口显示文摘本文提出了一种基于CPLD的双向并行通信接口,这种接口设计简单明了,可以解决两主机之间传输速率不一致问题,实现了可靠实时的数据传输。文中以实现MC51单片机与ISA总线接口的双向并行通信为例,具体阐述了这种双向通信接口的设计原理。 | 陆健峰 李晶 张维新 | 2004 | 微计算机信息2004，20，8： | 3 |
| 16 | MZQ.JDM-1.2B型脉动真空压力蒸汽灭菌器常见故障检修显示文摘0引言武汉市江汉医疗制药设备制造公司生产的MZQ.JDM-1.2B型脉动真空压力蒸汽灭菌器采用可编程逻辑控制器(programmable logic controller,PLC)进行消毒程序控制,自动工作程序有"真空"和"液体"程序,"真空"程序是利用机械置换空气原理,而"液体"程序是利用重力置换空气原理。因其自动化程度高、操作简单、性能稳定、安全可靠、灭菌效果好,在我国各大、中型医院中有一定的占有量。 | 郑志满 张冕 伍锡勇 | 2015 | 医疗卫生装备2015，36，9： | 3 |
| 17 | GPS P码接收机本地信号发生器的FPGA实现显示文摘P码作为GPS军用伪码,具有结构复杂、周期长且码速率快的特点,这使得使用P码的软件接收机不仅定位精度高,且具有很强的抗干扰和反欺骗能力。能够实现任意卫星的任意时刻P码的产生,对于实现P码直接捕获和跟踪有很重要的意义。对于P码的产生原理和结构进行了分析,基于MATLAB设计了相应的P码发生算法并进行简单的算法仿真。之后针对FPGA硬件平台对P码发生器进行了相应的模块设计,包含寄存器模块、延时模块、周期控制模块和寄存器相位模块等。测试实验结果表明P码发生器可以基本无延迟地生成任意卫星、任意时刻的P码。 | 曹进 李荣冰 徐昭 谢非 | 2013 | 系统仿真技术2013，9，1： | 3 |
| 18 | Contribution of the FPGAs for Complex Control Algorithms: Sensorless DTFC with an EKF of an Induction Motor显示文摘In a conventional direct torque control(CDTC) of the induction motor drive, the electromagnetic torque and the stator flux are characterized by high ripples. In order to reduce the undesired ripples, several methods are used in the literature. Nevertheless,these methods increase the algorithm complexity and dependency on the machine parameters such as the space vector modulation(SVM). The fuzzy logic control method is utilized in this work to decrease these ripples. Moreover, to eliminate the mechanical sensor the extended kalman filter(EKF) is used, in order to reduce the cost of the system and the rate of maintenance. Furthermore, in the domain of controlling the real-time induction motor drives, two principal digital devices are used such as the hardware(FPGA) and the digital signal processing(DSP). The latter is a software solution featured by a sequential processing that increases the execution time. However, the FPGA is featured by a high processing speed because of its parallel processing. Therefore, using the FPGA it is possible to implement complex algorithms with low execution time and to enhance the control bandwidth. The large bandwidth is the key issue to increase the system performances. This paper presents the interest of utilizing the FPGAs to implement complex control algorithms of electrical systems in real time. The suggested sensorless direct torque control using the fuzzy logic(DTFC) of an induction motor is successfully designed and implemented on an FPGA Virtex 5 using xilinx system generator. The simulation and implementation results show proposed approach s performances in terms of ripples, stator current harmonic waves, execution time, and short design time. | Saber Krim Soufien Gdaim Abdellatif Mtibaa Mohamed Faouzi Mimouni | 2019 | International Journal of Automation and computing2019，16，2： | 3 |
| 19 | 基于DSP的视频采集存储系统设计显示文摘介绍了视频采集存储系统的硬件设计及主要模块的数据处理流程、系统测试结果。采集制式为PAL的视频信号,经过视频解码器TVP5150转换为数字视频数据,利用TMS320DM642和CPLD器件及与非门Flash等主要器件实现了集视频数据采集、以太网传输、存储、压缩于一体的视频处理系统,该系统可用于工业流程检测、智能交通、机器人巡逻等涉及运动图像处理的领域。 | 梁炜 刘文怡 杨慧 | 2009 | 电子设计工程2009，17，2： | 3 |
| 20 | A Novel Iterative Velocity Control Algorithm and Its FPGA Implementation Based on Trigonometric Function显示文摘The servo motor's flexible acceleration/deceleration(acc/dec) control is an emerging research topic in the automation field. A velocity control algorithm based on trigonometric function is proposed in this paper.With required parameters, it transforms trigonometric calculations into elementary mathematical operations and calculates the velocity controlling values iteratively, which could avoid trigonometric calculation and reduce the computation time. Experimental results show that the proposed algorithm is suitable for implementation on field programmable gate arrays and achieves a flexible controlling, enhancing both the equipment's stability and reliability. It is promising to significantly improve the high-speed computerized numerical control equipment's controlling accuracy, without a huge hardware resource consumption. | WEN Quangang LIANG Yanchun Adriano Tavares Ricardo Teixeira WU Chunguo | 2019 | Chinese Journal of Electronics2019，28，2： | 2 |
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