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Satellite Navigation 2024年第1期5卷 10-51页

作者： Shuanggen Jin Adriano Camps Yan Jia Feng Wang Manuel Martin-Neira Feixiong huang Qingyun Yan Shuangcheng Zhang Zhongyu Li Komi Edokossi Dongkai Yang Zhiyu Xiao Zhongmin Ma weihua Bai Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai200030China School of Surveying and Land Information Engineering Henan Polytechnic UniversityJiaozuo454003China Department of Signal Theory and Communications Technical University of CataloniaBarcelona08034Spain Department of Surveying and Geoinformatics Nanjing University of Posts and TelecommunicationsNanjing210023China School of Electronics and Information Engineering Beihang UniversityBeijing100191China European Space Research and Technology Centre(ESTEC) European Space Agency2200-AGNoordwijkThe Netherlands National Space Science Center Chinese Academy of SciencesBeijing100190China School of Remote Sensing and Geomatics Engineering Nanjing University of Information Science and TechnologyNanjing210044China College of Geological Engineering and Geomatics Chang’an UniversityXi’an710054China University of Electronic Science and Technology of China Chengdu611731China

The Global Navigation Satellite Systems(GNSS),including the US’s GPS,China’s BDS,the European Union’s Galileo,and Russia’s GLONASS,offer real-time,all-weather,any-time,anywhere and high precision observations by transmitting L band signals continuously,which have been widely used for positioning,navigation and timing.With the development of GNSS technology,it has been found that GNSS-reflected signals can be used to detect Earth’s surface characteristics together with other signals of opportunity.In this paper,the current status and latest advances are presented on Global Navigation Satellite System-Reflectometry(GNSS-R)in theory,methods,techniques and observations.New developments and progresses in GNSS-R instruments,theoretical modeling,and signal processing,ground and space-/air-borne experiments,parameters retrieval(e.***.wind speed,sea surface height,soil moisture,ice thickness),sea surface altimetry and applications in the atmosphere,oceans,land,vegetation,and cryosphere are given and reviewed in details.Meanwhile,the challenges in the GNSS-R development of each field are also given.Finally,the future applications and prospects of GNSS-R are discussed,including multi-GNSS reflectometry,new GNSS-R receivers,GNSS-R missions,and emerging applications,such as mesoscale ocean eddies,ocean phytoplankton blooms,microplastics detection,target recognition,river flow,desert studies,natural hazards and landslides monitoring.

关键词： GNSS Reflectometry Remote sensing Environmental change

Amperometric Detection of Histamine and Amino Acid Neurotransmitters in Capillary Electrophoresis with Copper Microelectrodes

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Wuhan University Journal of Natural Sciences 1998年第3期3卷 87-90页

作者： Hu, Shen huang, weihua Pang, Daiwen Wang, Zongli Cheng, Jieke

Copper microelectrodes were used in microvoltammetry to detect histamine and several amino acid neurotransmitters. High sensitivity was obtained through the use of copper microelectrodes, and detection limits of 50 nmol/L and 90 nmol/L were obtained for histamine and histidine, respectively. Furthermore, histamine and several amino acids neurotransmitters were firstly separated and detected by capillary electrophoresis with amperometric detection on copper microelectrodes. Mass limits of 490 amol and 440 amol were achieved for histamine and histidine, respectively, by using this mothod.

关键词： capillary electrophoresis amperometric detection copper microelectrode

粤港澳大湾区高校间科研合作创新的现状和空间结构——基于中国知网数据库的社会网络分析

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科技管理研究 2022年第7期42卷 87-93页

作者：黄卫华姚宗浩暨南大学国际商学院暨南大学“一带一路”与粤港澳大湾区研究院广东珠海519070

通过社会网络分析方法,选取城市群中粤港澳大湾区城市群中20所高校作为考察对象,以中国知网数据库为检索平台,分析各高校间科研合作创新水平,了解其科研合作创新的基本情况。研究发现,粤港澳大湾区20所高校间科研合作频次较低,港澳高校... 详细信息

通过社会网络分析方法,选取城市群中粤港澳大湾区城市群中20所高校作为考察对象,以中国知网数据库为检索平台,分析各高校间科研合作创新水平,了解其科研合作创新的基本情况。研究发现,粤港澳大湾区20所高校间科研合作频次较低,港澳高校普遍存在合作动力不足的现状,且港澳高校参与度更低,广东省内高校之间的合作占据主导地位;其合作频次依赖于相关政策和学科优势;合作模式主要通过研究项目与学术交流,科研合作创新模式呈现出强强联手、跨地合作的新模式。此外,为推动粤港澳大湾区城市群高校间科研合作创新和改善其合作空间结构,文章研究提出突破地域壁垒限制、开展多层次合作、统筹跨区域学科合作以及依托研究项目增进粤港澳大湾区合作创新趋向集群化发展等建议。

关键词：粤港澳大湾区高等教育科研合作创新社会网络分析

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中国柑橘生产空间布局演化及驱动因素研究

华中农业大学学报（社会科学版） 2022年第4期 90-103页

作者：黄伟华祁春节华中农业大学经济管理学院/园艺经济研究所湖北武汉430070

精准把握中国柑橘生产格局、空间演化特征及其驱动因素是合理配置生产资源,科学制定发展政策以及推进柑橘产业供给侧结构性改革的基础。基于1978−2019年中国柑橘生产省级面板数据,运用生产重心模型和GIS技术分析柑橘生产空间布局变迁的... 详细信息

精准把握中国柑橘生产格局、空间演化特征及其驱动因素是合理配置生产资源,科学制定发展政策以及推进柑橘产业供给侧结构性改革的基础。基于1978−2019年中国柑橘生产省级面板数据,运用生产重心模型和GIS技术分析柑橘生产空间布局变迁的特征、绘制柑橘生产重心变迁的轨迹,并构建空间杜宾模型实证分析中国柑橘生产布局变迁的驱动因素。结果表明:(1)中国柑橘生产重心具有往复式变化的特征,总体呈现出向西南方向移动的趋势,且资源禀赋的变化与生产重心的变化存在不匹配的情况;(2)中国柑橘生产存在着显著的空间自相关性和正向空间溢出效应,且大部分变量的间接效应要大于直接效应;(3)柑橘生产布局的变迁受到温度、受灾面积、比较收益、灌溉水平以及非农就业水平等多方面因素的影响,而且不同柑橘产区生产布局变迁的驱动因素也存在显著差异。由此提出应根据柑橘生产布局变化规律,优化品种结构,充分发挥资源禀赋和技术进步的驱动作用并有效利用影响因素的正向溢出效应,从而优化柑橘生产空间布局。

关键词：柑橘生产空间演变空间计量模型驱动因素

Molecular Detection of Phytophthora colocasiae of Taro Leaf Blight Based on PCR

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Journal of Landscape Research 2020年第1期12卷 33-35,38页

作者： huang weihua YAN Meixin Biotechnology Research Institute Guangxi Academy of Agricultural Sciences

The present PCR assay was conducted to develop rapid and sensitive detection of Phytophthora colocasiae,in order to provide a robust and reliable tool for healthy seedling production of taro and limiting the transmission and spread of the causal organism of taro leaf blight in taro planting regions.The samples were used to extract total DNA and to be detected by PCR with P.colocasiae specific primer pairs PCSP-RL F/PCSP-RL R and PCSP-T F/PCSP-T R,respectively.Distinct fragments of about 200 bp and 240 bp were amplified by PCR using primers PCSP-RL F/PCSP-RL R and PCSP-T F/PCSP-T R,respectively.The analysis of the nucleotide sequence of the PCR products were found to be 99% identical to sequence of RAS-related protein (Ypt1) and phospho-ribosylanthranilate isomerase (TRP1) in P.colocasiae,respectively.It is concluded that rapid and sensitive developed PCR assay for detection of P.colocasiae could be used in routine diagnosis and aid in management practices to mitigate taro leaf blight.

关键词： Colocasia esculenta(L.)Schott Taro leaf blight Phytophthora colocasiae Molecular detection

A low-noise fully-differential CMOS preamplifier for neural recording applications

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Science China(Information Sciences) 2012年第2期55卷 441-452页

作者： ZHANG Xu,PEI weihua,huang BeiJu,GUAN Ning & CHEN HongDa State Key Laboratory on Integrated Optoelectronics,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China State Key Laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Beijing China

A fully-differential bandpass CMOS preamplifier for extracellular neural recording is presented in this paper.The capacitive-coupled and capacitive-feedback topology is adopted.We describe the main noise sources of the proposed preamplifier and discuss the methods for achieving the lowest input-referred noise.The preamplifier has a midband gain of 43 dB and a DC gain of 0.The-3 dB upper cut-off frequency of the preamplifier is 6.8 kHz.The lower cut-off frequency can be adjusted for amplifying the field or action potentials located in different bands.It has an input-referred noise of 3.36 μVrms integrated from 1 Hz to 6.8 kHz for recording the local field potentials(LFPs)and the mixed neural spikes with a power dissipation of 24.75 μW from 3.3 V supply.When the passband is configured as 100 Hz-6.8 kHz for only recording spikes,the noise is measured to be 3.01 μVrms.The 0.115 mm2 prototype chip is designed and fabricated in 0.35-μm N-well CMOS(complementary metal oxide semiconductor)2P4M process.

关键词： neural signal amplifier low noise low power subthreshold circuit design noise efficiency factor(NEF)

Analysis and Design of Fuzzy-PID Controller with Generalized Linear Membership Function

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Analysis and Design of Fuzzy-PID Controller with Generalized...

第26届中国控制与决策会议

作者： huang weihua Zhang Zheng Fang Kangling Information Science and Engineering school Wuhan University of Science and Technology

ISBN: (纸本)9781479937066

A kind of membership function, called as generalized linear membership function（GLMF）, is designed in the paper, and the triangular and trapezoid ones are as its special cases. It is derived that the fuzzy-PID Controller with GLMF is equivalent to the sum of a nonlinear PID controller and a compensation value, based on the analytical structure of the controller. With the definition of fuzzy Lyapunov function, the stabilization condition is given to adjust the performance of the fuzzy system. Finally, the characters of the designed fuzzy system, derived by theoretical analysis, are manifested by the simulation results of several examples

关键词： fuzzy-PID controller generalized linear membership function analytical structure stability

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基于改进JPS和A*算法的组合路径规划

高技术通讯 2022年第4期32卷 412-420页

作者：金震黄卫华李传奇何佳乐武汉科技大学机器人与智能系统研究院武汉430081 武汉科技大学冶金自动化与检测技术教育部工程研究中心武汉430081 武汉科技大学信息科学与工程学院武汉430081

针对跳点搜索(JPS)算法预处理规则不安全、大规模地图中存在跳点多且混乱的问题,设计了一种基于改进JPS和A*算法的组合规划算法。首先,改进了JPS算法的跳点筛选规则且对冗余的中间跳点进行删减,通过引入安全性评估模型保证规划路径的安... 详细信息

针对跳点搜索(JPS)算法预处理规则不安全、大规模地图中存在跳点多且混乱的问题,设计了一种基于改进JPS和A*算法的组合规划算法。首先,改进了JPS算法的跳点筛选规则且对冗余的中间跳点进行删减,通过引入安全性评估模型保证规划路径的安全性;然后,根据路径搜索环境的复杂度设计了一种跳点阈值函数,在此基础上将改进JPS算法与A*算法相结合构成组合路径规划算法,该算法根据跳点的数量对路径搜索中后继节点拓展策略进行不同的选择,由此减少计算节点的数量并达到提高路径全局规划效率的目的;最后,仿真实验结果表明,当地图规模越大或非对称路径越多时,本文所设计的改进JPS和A*算法提高路径规划的安全性和效率性效果越明显。

关键词：路径规划跳点搜索(JPS)算法 A*算法跳点阈值函数

基于Huber鲁棒估计的改进互补滤波姿态解算算法

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电子测量与仪器学报 2022年第3期36卷 157-165页

作者：郭庆瑞章政黄卫华李磊武汉科技大学机器人与智能系统研究院武汉430000 武汉科技大学信息科学与工程学院武汉430000

针对站球机器人在坡面运动过程中,由于系统振荡倾向性导致的姿态估计不准确以及在估计中存在噪声等问题,设计了一种基于Huber鲁棒估计的改进互补滤波姿态解算算法。首先,对站球机器人在斜坡上进行了动力学分析和运动性能分析。其次,利用... 详细信息

针对站球机器人在坡面运动过程中,由于系统振荡倾向性导致的姿态估计不准确以及在估计中存在噪声等问题,设计了一种基于Huber鲁棒估计的改进互补滤波姿态解算算法。首先,对站球机器人在斜坡上进行了动力学分析和运动性能分析。其次,利用Huber鲁棒估计抑制站球机器人在坡面运动过程中由于机身振荡所引入的干扰噪声,并改进互补滤波进行姿态解算。最后,为了减少磁力计输出不稳定对姿态解算的干扰,设计了一种数据平滑切换方法。实物实验结果表明,设计的基于Huber鲁棒估计的改进互补滤波姿态解算算法相比于互补滤波算法,对俯仰角、横滚角和偏航角的估计精度分别平均提高19.21%、25.48%和36.04%,该算法可以有效地抑制站球机器人在坡面运动过程中由于机身振荡引入的噪声,能够保证姿态解算的准确性和实时性。

关键词：站球机器人动力学模型姿态解算 Huber鲁棒估计互补滤波