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A Critical Topology Review of Power Electronic Transformers:In View of Efficiency

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Chinese Journal of Electrical Engineering 2018年第2期4卷 90-95页

作者： guidong zhang Jie Chen Bo zhang Yun zhang School of Automation Guangdong University of TechnologyGuangzhou 510006China South China University of Technology Guangzhou 510006China

Design of power electronic transformers is a hot research topic and its efficiency improvement is a critical problem all over the *** is also the largest barrier hindering the application of power electronic transformers in *** this paper,the state of power electronic transformers is fully presented in terms of efficiency *** is followed by the efficiency modeling of several typical topologies,and their detailed analysis and ***,the corresponding industrial application scope of these topologies is presented,providing theoretical guidance for their industrial applications.

关键词： Power electronic transformer topology efficiency modeling

A Review of Isolated Bidirectional DC-DC Converters for Data Centers

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Chinese Journal of Electrical Engineering 2023年第4期9卷 1-22页

作者： Shuohang Chen guidong zhang Samson S.Yu Yi Mei Yun zhang School of Automation Guangdong University of TechnologyGuangzhou 510600China School of Engineering Deakin UniversityMelbourne 3125Australia Global Data Services Holdings Ltd. Guangzhou 510600China

In today’s fast-paced,information-driven world,data centers can offer high-speed,intricate capabilities on a larger scale owing to the ever-growing demand for networks and information *** data centers process and transmit information,stability and reliability are *** center power supply architectures rely heavily on isolated bidirectional DC-DC converters to ensure safety and *** the smooth operation of a data center,the power supply must be reliable and *** this study,we summarize the basic principle,topology,switch conversion strategy,and control technology of the existing isolated bidirectional DC-DC ***,existing research results and problems with isolated bidirectional DC-DC converters are ***,future trends in the development of isolated bidirectional DC-DC converters for data centers are presented,which offer valuable insights for solving engineering obstacles and future research directions in the field.

关键词： Data centers isolated bidirectional DC-DC converters power electronics topology control strategy

A Review of Variable-inductor-based Power Converters for Eco-friendly Applications:Fundamentals,Configurations,and Applications

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Chinese Journal of Electrical Engineering 2023年第3期9卷 50-71页

作者： Zijie He guidong zhang Zexiang Chen Samson S.Yu School of Automation Guangdong University of TechnologyGuangzhou 510000China School of Engineering Deakin UniversityMelbourne 3000Australia

Modern eco-friendly industries such as renewable energy systems,electric vehicles(EVs),and light-emitting diodes(LEDs)have led to technological advancements in power ***-based power converters have limited working ranges and can cause significant harmonics and oscillations in the output voltage and *** variable inductors can help solve this problem by changing the inductance without resorting to extreme switch duty *** their advantages,there is still a lack of comprehensive reviews of variable inductor applications in power converter design.A thorough and in-depth review of variable inductance control in power conversion is presented,including its significance,working principle,core structure,modeling method,and typical ***,an inductor works in its linear magnetic region;its inductance in a power converter is considered constant,and the converter operates under fixed working ***,a broad range of working conditions is required for power converters in practical *** is typically realized by changing the duty cycles of the *** working principle of variable inductance is reviewed,and the application of variable inductance control in power converters is presented,which will further help power electronics researchers and engineers design flexible and resilient power converters.

关键词： Variable inductors magnetic saturation magnetically controlled inductors power converter

Research on Fall Detection System Based on Commercial Wi-Fi Devices

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ZTE Communications 2023年第4期21卷 60-68页

作者： GONG Panyin zhang guidong zhang Zhigang CHEN Xiao DING Xuan School of software Tsinghua UniversityBeijing 100084China ZTE Corporation Shenzhen 518057China State Key Laboratory of Mobile Network and Mobile Multimedia Technology Shenzhen 518055China

Falls are a major cause of disability and even death in the elderly,and fall detection can effectively reduce the *** with cameras and wearable sensors,Wi-Fi devices can protect user privacy and are inexpensive and easy to ***-Fi devices sense user activity by analyzing the channel state information(CSI)of the received signal,which makes fall detection *** propose a fall detection system based on commercial Wi-Fi devices which achieves good *** the feature extraction stage,we select the discrete wavelet transform(DWT)spectrum as the feature for activity classification,which can balance the temporal and spatial *** the feature classification stage,we design a deep learning model based on convolutional neural networks,which has better performance compared with other traditional machine learning *** results show our work achieves a false alarm rate of 4.8%and a missed alarm rate of 1.9%.

关键词： fall detection commercial Wi-Fi devices discrete wavelet transform deep learning model

The Analysis and Research Based on DEA Model and Super Efficiency DEA Model for Assessment of Classified Protection of Information Systems Security

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计算机科学与技术汇刊（中英文版） 2014年第4期3卷 140-145页

作者： Jing Gao Yongiun Shen guidong zhang Qi Zhou School oflnformation Science & Engineering Lanzhou University Lanzhou Gansu Province 730000 China

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基于虚拟仪器的全自动电化学分析系统的研究

仪器仪表学报 2005年第10期26卷 1002-1006页

作者：叶学松张贵东高波王平浙江大学生物传感器国家专业实验室

提出并设计了一种新型的全自动电化学分析系统。该系统在虚拟仪器(L abv iew)的软件平台上,构架了由IEEE 488PC I-GP IB卡、多功能DAQ卡(PC I-6035E)、GP IB程控电源(E 3631A)、低噪声电流放大器(M ode l SR 570)、双通道滤波器(M ode l... 详细信息

提出并设计了一种新型的全自动电化学分析系统。该系统在虚拟仪器(L abv iew)的软件平台上,构架了由IEEE 488PC I-GP IB卡、多功能DAQ卡(PC I-6035E)、GP IB程控电源(E 3631A)、低噪声电流放大器(M ode l SR 570)、双通道滤波器(M ode l SR 650)等仪器组成的硬件测试平台,并建立开发了一套完整的控制和分析软件,实现了电化学分析中进样、加标、富集、扫描、清洗和分析等过程的全自动化。以微分脉冲溶出伏安法(DPSV)检测海水中4种痕量的重金属元素(Cu2+、Cd2+、Zn2+、Pb2+)为例,详细介绍了测试分析的实现过程。该测试平台不仅易于研究电化学分析中的各种检测方法和数据分析方法,而且为研发适于现场监测的全自动电化学分析测试方案提供了良好的平台。

关键词：电化学分析仪器虚拟仪器微分脉冲溶出伏安法痕量元素检测

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藏汉文身份证制作系统的设计与实现

计算机工程 2006年第19期32卷 273-274,F0003页

作者：齐爱琴申永军张桂东兰州大学信息科学与工程学院兰州730000

通过对少数民族地区(尤其是藏族民族聚居区)居民身份证应用需求的分析,参考了公安部颁发的关于换发和制作居民第2代身份证的相关标准,针对当前藏族聚居区制作身份证存在的问题,设计和实现了一种新的身份证制作系统。

关键词：藏文身份证输入法镜像打印

一种改进型多单元开关电感升压变换器的自适应电流控制方法

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电网技术 2022年第4期46卷 1430-1436页

作者：何卓霖张桂东林伟群乐卫平广东工业大学自动化学院广东省广州市510006 深圳市恒运昌真空技术有限公司广东省深圳市518101

相对传统多单元开关电感升压变换器,改进型多单元开关电感升压变换器(improved multi-cell switched-inductor boost converter,InSL-Boost)在不增加器件的前提下,能够获得更高的电压增益以及更低的功耗损失而被广泛应用。针对该变换器... 详细信息

相对传统多单元开关电感升压变换器,改进型多单元开关电感升压变换器(improved multi-cell switched-inductor boost converter,InSL-Boost)在不增加器件的前提下,能够获得更高的电压增益以及更低的功耗损失而被广泛应用。针对该变换器,一般采用传统电流型控制策略,然而,当负载多变或未知时有可能引起控制失稳等问题。对此,采用一种自适应电流模式控制方法对其进行调节,使用该控制方法能够更准确、及时地应对负载的扰动。同时,对采用自适应电流模式控制方法的控制器进行设计,并进行了仿真和实验验证。结果表明,所提出的自适应电流模式控制策略更适合改进型多单元开关电感升压变换器的负载变化情况,同时也验证了所提出的控制方法在负载扰动下的有效性。

关键词：改进型多单元开关电感升压变换器自适应电流模式控制控制策略负载扰动

康莱特注射液对胆囊癌术后辅助化疗患者生存质量的影响

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中医学报 2017年第9期32卷 1589-1591页

作者：张桂东邯郸市中心医院

目的:观察康莱特注射液对胆囊癌术后辅助化疗患者生存质量的影响。方法:将46例胆囊癌术后辅助化疗患者随机分为观察组24例和对照组22例,对照组予以化疗治疗,观察组在对照组基础上加用康莱特注射液静脉滴注,观察治疗后两组生存质量及不... 详细信息

目的:观察康莱特注射液对胆囊癌术后辅助化疗患者生存质量的影响。方法:将46例胆囊癌术后辅助化疗患者随机分为观察组24例和对照组22例,对照组予以化疗治疗,观察组在对照组基础上加用康莱特注射液静脉滴注,观察治疗后两组生存质量及不良反应发生情况。结果:治疗后观察组生存质量明显改善,有效率87.5%,对照组有效率59.0%,两组比较,差异有统计学意义(P<0.05)。观察组不良反应发生情况明显少于对照组,且不良反应较轻,两组比较,差异有统计学意义(P<0.05)。结论:康莱特注射液在改善胆囊癌术后化疗不良反应及生存质量方面有较好的临床疗效。

关键词：胆囊癌肿瘤康莱特注射液术后化疗生存质量中医药治疗中西医结合