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改进的变步长自适应最小均方算法及其数字信号处理

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强激光与粒子束 2015年第9期27卷 39-43页

作者：吕照顺吴晗平李军雨海军工程大学兵器工程系武汉430033 武汉工程大学光电子系统技术研究所武汉430205 湘潭大学物理与光电工程学院湖南湘潭411105

针对紫外光通信中传统自适应最小均方(LMS)算法存在的不足,提出了一种新的变步长LMS(VSS-LMS)算法,利用MATLAB仿真验证了该算法的可行性,以TMS320VC5509为核心设计了数字信号处理(DSP)最小化硬件系统和VSS-LMS算法的软件流程,在硬件上... 详细信息

针对紫外光通信中传统自适应最小均方(LMS)算法存在的不足,提出了一种新的变步长LMS(VSS-LMS)算法,利用MATLAB仿真验证了该算法的可行性,以TMS320VC5509为核心设计了数字信号处理(DSP)最小化硬件系统和VSS-LMS算法的软件流程,在硬件上实现了传统LMS算法和新的VSS-LMS算法的自适应滤波,并进行了对比分析,结果表明所提出的VSS-LMS算法具有较快的收敛速度和较小的稳态误差,这对紫外光通信接收系统的设计和优化具有一定的参考意义。

关键词：紫外光通信最小均方算法变步长最小均方算法数字信号处理

Functions and Applications of Intestinal Symbiotic Microorganisms in Insects

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Asian Agricultural Research 2024年第8期16卷 23-28页

作者： Cong CHEN junyu LIN Zhaoyan LIN Qianrou LI Jingyi HUANG Qijing wu Qianhua JI Institute of Pomology/College of Life Sciences Zhaoqing UniversityZhaoqing 526061China

Insects represent a diverse group of organisms on earth that carry a vast array of symbiotic microorganisms in their *** microorganisms have established a complex and intimate symbiotic relationship with their host insects over an extended period of evolutionary *** population structure of intestinal symbiotic microorganisms in insects exhibits a high degree of diversity,with notable differences among insect ***,within the same insect species,the population structure of symbiotic microorganisms in specific intestinal sites demonstrates a certain degree of stability and *** symbiotic microorganisms perform various physiological functions in the host *** biological functions encompass nutrient and material metabolism and immune and protective mechanisms,which have significant effects on host insect longevity,development,and reproductive *** microorganisms have diverse applications,including pest control,bioenergy production,the development of insect resources,*** advancements in high-throughput sequencing technology have revealed a growing diversity and biological properties of these *** application of these techniques has significantly contributed to the advancement of research in the field of insect intestinal microbial research,providing researchers with powerful tools for a deeper understanding and utilization of these symbiotic *** study reviewed the research progress of insect intestinal microorganisms in three aspects:diversity,biological functions,and *** objective was to provide useful references and insights for further research and applications of insect intestinal microorganisms.

关键词： Symbiotic microorganisms Intestinal flora Population structure Diversity High-throughput sequencing

Finite superconducting square wire-network based on two-dimensional crystalline Mo_(2)C

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Chinese Physics B 2022年第9期31卷 134-140页

作者： Zhen Liu Zi-Xuan Yang Chuan Xu Jia-Ji Zhao Lu-junyu Wang Yun-Qi Fu Xue-Lei Liang Hui-Ming Cheng Wen-Cai Ren Xiao-Song wu Ning Kang Key Laboratory for the Physics and Chemistry of Nanodevices School of Electronics and Center for Carbon-Based ElectronicsPeking UniversityBeijing 100871China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China State Key Laboratory for Artificial Microstructure and Mesoscopic Physics Frontiers Science Center for Nano-optoelectronicsPeking UniversityBeijing 100871China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China

Superconducting wire-networks are paradigms to study Cooper pairing issues,vortex dynamics and ***,emergent low-dimensional crystalline superconductors were reported in the minimal-disorder limit,providing novel platforms to reveal vortices-related *** on superconducting loops with high-crystallinity is thus currently ***,we report fabrication and transport measurement of finite square-network based on two-dimensional crystalline superconductor Mo_(2)*** observe oscillations in the resistance as a function of the magnetic flux through the *** dips at both matching field and fractional fillings are *** and current evolutions are carried out in magnetoresistance to study vortex *** amplitude of oscillation is enhanced due to the interaction between thermally activated vortices and the currents induced in the *** driving current reduces the effective activation energy for vortex,giving rise to stronger vortex ***,by the thermally activated vortex creep model,we derive the effective potential barrier for vortex dissipation,which shows well-defined correspondence with structures in *** work shows that low-dimensional crystalline superconducting network based on Mo_(2)C possesses pronounced potential in studying the modulation of vortex arrangements and dynamics,paving the way for further investigations on crystalline superconducting network with various configurations.

关键词： superconducting wire-network crystalline superconductor vortex dynamics low temperature transport

Near-threshold-voltage operation in flash-based high-precision computing-in-memory to implement Poisson image editing

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Science China(Information Sciences) 2023年第12期 261-266页

作者： Yang FENG Bing CHEN Mingfeng TANG Yueran QI Maoying BAI Chengcheng WANG Hai WANG Xuepeng ZHAN junyu ZHANG Jing LIU Jixuan wu Jiezhi CHEN School of Information Science and Engineering Shandong University School of Micro-nano Electronics Zhejiang University Neumem Co. Ltd Key Laboratory of Microelectronic Devices and Integrated Technology Institute of Microelectronics of Chinese Academy of Sciences

We propose a NOR flash-based computing-in-memory(CIM) to implement high-precision(32-bit) Poisson image editing, including the gradient operations and Laplace operation. To meet the requirements of image processing, CIM operation schemes and reliabilities are carefully studied and optimized,showing that the power consumption at the near-threshold-voltage(NTV) region can be as low as 40 fJ/bit,which is two orders lower than working at the saturation region. High-temperature retention, as well as various disturbs, are also analyzed. The proposed CIM scheme can be applied as an energy-efficient approach to construct the high-precision image processing accelerator.

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基于自由空间光的无人机集群通信载荷技术发展现状与趋势

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国防科技大学学报 2021年第4期43卷 118-127页

作者：苏绍璟童小钟魏俊宇吴鹏国防科技大学智能科学学院湖南长沙410073

对基于自由空间光(Free Space Optical, FSO)的无人机集群通信载荷技术应用需求进行了归纳总结,论述了FSO通信技术及应用在无人机载荷的国内外发展现状,展望了高速移动通信环境下无人机集群FSO通信载荷技术的未来发展趋势,进一步深入分... 详细信息

对基于自由空间光(Free Space Optical, FSO)的无人机集群通信载荷技术应用需求进行了归纳总结,论述了FSO通信技术及应用在无人机载荷的国内外发展现状,展望了高速移动通信环境下无人机集群FSO通信载荷技术的未来发展趋势,进一步深入分析了应用于无人机集群的FSO通信链路的关键技术。可以预见,基于FSO的通信载荷将广泛应用于未来无人机集群的大带宽通信组网。

关键词：自由空间光通信无人机集群发展现状与趋势

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电流体动力学传导泵研究进展

中国科学：技术科学 2022年第11期52卷 1623-1648页

作者：杜中林吴健黄俊宇王琦哈尔滨工业大学能源科学与工程学院空天热物理工信部重点实验室哈尔滨150001

本文介绍了一种新兴的流体流动生成与控制技术——电流体动力学传导泵(电导泵).该种泵是基于电场与介电液体直接相互作用的一类非机械泵.库仑力为泵驱动力,自由电荷来源于液体中杂质或弱电解质的解离过程.除了拥有电流体泵的普遍优点(... 详细信息

本文介绍了一种新兴的流体流动生成与控制技术——电流体动力学传导泵(电导泵).该种泵是基于电场与介电液体直接相互作用的一类非机械泵.库仑力为泵驱动力,自由电荷来源于液体中杂质或弱电解质的解离过程.除了拥有电流体泵的普遍优点(如可通过电场实现智能主动控制、无机械运动部件、设计简单、重量轻、适用于低重力空间等特殊环境、能耗低等),电导泵还具有性能稳定、工作寿命长等独特优势.除了流量调控、传热强化和增强混合等传统应用,近年来电导泵在微型机器人驱动、可穿戴设备、机电一体化(制动器)等领域获得多种创新应用.目前,国外电导泵技术已从宏观尺度单相流体逐步发展到微尺度多相流研究,并开始在低重力环境在轨进行测试,有望应用于未来航天器空间热管理等领域.国内对电流体动力学的研究起步较晚,缺少电导泵相关的研究.因此,本文从电导泵工作原理、理论模型、数理方程、研究现状和前沿进展等方面进行了总结,并对未来发展进行了展望.

关键词：电流体动力学电导泵介电液体库仑力散热系统

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WC-Co硬质合金的成型工艺研究进展

机械工程学报 2023年第8期59卷 60-73页

作者：罗来马汤俊宇吴玉程合肥工业大学材料科学与工程学院合肥230009 有色金属与加工技术国家地方联合工程研究中心合肥230009 高性能铜合金材料及成形加工教育部工程研究中心合肥230009

WC-Co硬质合金由难熔金属化合物WC和粘结相Co组成,其展现出优异综合性能因而被广泛应用于制造各种削切刀具和耐磨部件。目前人们研究的重点在硬质合金粉体的制备、烧结以及晶粒长大抑制剂等方面,然而硬质合金的成型工艺由于技术复杂且... 详细信息

WC-Co硬质合金由难熔金属化合物WC和粘结相Co组成,其展现出优异综合性能因而被广泛应用于制造各种削切刀具和耐磨部件。目前人们研究的重点在硬质合金粉体的制备、烧结以及晶粒长大抑制剂等方面,然而硬质合金的成型工艺由于技术复杂且较难改进,受到的关注较少,但成型工艺作为硬质合金制备的重要一环起着从粉末到样品的承接作用,成型后坯体具有高致密度、高均匀性对于后续烧结获得最终硬质合金产品的物理力学性能具有很大的促进效果。对注射成型、等静压成型、模压成型等传统WC-Co硬质合金成型技术进行介绍,并对最新研究进展进行概述,重点介绍近年来兴起的3D打印技术在WC-Co硬质合金上的应用现状,最后对各种成型技术的优缺点及前景进行分析与展望。

关键词： WC-Co硬质合金注射成型等静压成型 3D打印成型

Modeling the dynamic deformation process of light-responsive liquid crystal elastomer actuator

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Modeling the dynamic deformation process of light-responsive...

第43届中国控制会议

作者： junyu Xue Jundong wu Qingxin Meng Yawu Wang Chun-Yi Su Daiki Sato Jinhua She School of Automation China University of Geosciences Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education Laboratory for Future Interdisciplinary Research of Science and Technology (FIRST) Tokyo Institute of Technology Gina Cody School of Engineering and Computer Science Concordia University The School of Engineering Tokyo University of Technology

Light-responsive liquid crystal elastomer actuators(LCEAs) enables novel remote-controlled soft robot actuation,bringing new possibilities to the application of soft ***,these actuators have complicated dynamic characteristics,and a dynamic model that can describe the deformation process of LCEAs is needed to predict and control their *** on the above consideration,this paper proposes a model to describe the dynamic deformation process of light-responsive *** proposed model consists of two parts:a dynamic temperature model and a dynamic deformation *** order to verify the proposed model,we establish a light-responsive LCEA experimental platform and perform LCEA deformation *** parameters of the model are identified by the nonlinear least squares *** experimental results show that the proposed model can characterize the dynamic deformation process of LCEAs with precision.

关键词： Liquid crystal elastomer actuator dynamic modeling hysteresis Prandtl-Ishlinskii model

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三元概念的一种构造方法

计算机研究与发展 2019年第4期56卷 844-853页

作者：王霞江山李俊余吴伟志浙江海洋大学数理与信息学院浙江舟山316022 浙江省海洋大数据挖掘与应用重点实验室(浙江海洋大学) 浙江舟山316022

三元概念分析是一种数据分析和信息处理的新方法.三元概念的构造是三元概念分析的重要问题之一.首先,研究一个三元概念的外延、内涵和方式中存在空集时该三元概念具有的性质,并给出这类三元概念的判定方法.其次,定义一类特殊的三元概念... 详细信息

三元概念分析是一种数据分析和信息处理的新方法.三元概念的构造是三元概念分析的重要问题之一.首先,研究一个三元概念的外延、内涵和方式中存在空集时该三元概念具有的性质,并给出这类三元概念的判定方法.其次,定义一类特殊的三元概念,称其为对象-条件三元概念.在对象-条件三元概念构成的集合上定义一种运算,并利用该运算提出一种基于对象-条件三元概念生成三元概念的方法.该方法表明:如果一个三元概念的外延和方式均为非空集合,那么它可以由某些对象-条件三元概念生成.此外,将一个三元背景按照每一个条件分解为一系列二元背景,研究该三元背景上的对象-条件三元概念与分解后的二元背景上的对象二元概念之间的关系,并进一步给出了由对象-条件三元概念生成三元概念的具体步骤.最后,通过实例阐明由对象-条件三元概念构造三元概念的详细过程,并给出了三元图来清晰地描述所生成的所有三元概念.

关键词：概念格二元概念三元背景三元概念对象条件三元概念