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Local Hybrid Linear State Estimation for Electric Power Systems Using Stream Processing

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CSEE Journal of Power and Energy Systems 2024年第3期10卷 1259-1268页

作者： kang Sun Manyun huang Zhinong Wei Yuzhang Lin Guoqiang Sun College of Energy and Electrical Engineering Hohai UniversityNanjing 210098China Department of Department of Electrical and Computer Engineering University of Massachusetts LowellLowell MA 01854USA IEEE

The increasing penetration of renewable energy resources with highly fluctuating outputs has placed increasing concern on the accuracy and timeliness of electric power system state estimation(SE).Meanwhile,we note that only a fraction of system states fluctuate at the millisecond level and require to be *** such,refreshing only those states with significant variation would enhance the computational efficiency of SE and make fast-continuous update of states ***,this is difficult to achieve with conventional SE methods,which generally refresh states of the entire system every 4–5 *** this context,we propose a local hybrid linear SE framework using stream processing,in which synchronized measurements received from phasor measurement units(PMUs),and trigger/timingmode measurements received from remote terminal units(RTUs)are used to update the associated local ***,the measurement update process efficiency and timeliness are enhanced by proposing a trigger measurement-based fast dynamic partitioning algorithm for determining the areas of the system with states requiring *** particular,non-iterative hybrid linear formulations with both RTUs and PMUs are employed to solve the local SE *** timeliness,accuracy,and computational efficiency of the proposed method are demonstrated by extensive simulations based on IEEE 118-,300-,and 2383-bus systems.

关键词： Fast dynamic partitioning local hybrid linear state estimation phasor measurement units stream processing timeliness trigger/timing-mode measurements

Effect of electrochemical etching current on prepared perforated silicon structures for neutron detectors

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Frontiers of Materials Science 2013年第1期7卷 96-101页

作者： Xiao-Qiang FAN Yong JIANG Chang-Yong ZHAN Yu ZOU Jian-Chun WU Ning-kang huang Institute of Nuclear Physics and Chemistry China Academy of Engineering Physics Mianyang 621900 China Key Laboratory of Radiation Physics and Technology (Ministry of Education) Institute of Nuclear Science and Technology Sichuan University Chengdu 610064 China

Neutron detector based on perforated silicon structures backfilled with neutron converting materials could be operated at a low voltage and improves the detection efficiency of thermal neutron. It is found that the intrinsic detection efficiency of thermal neutron is affected by a lot of factors such as the geometry, size, and depth of the perforation and so on. In this study, the perforated silicon was prepared by electrochemical etching. Effect of etching current on geometry, size, and depth of the perforated silicon structures for neutron detectors was also reported.

关键词： neutron detector silicon electrochemical etching current

A novel sensitive non-enzymatic glucose sensor

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Chinese Chemical Letters 2007年第2期18卷 189-191页

作者： Xin huang kang Zhi Bin Mai Xiao Yong Zou Pei Xiang Cai Jin Yuan Mo School of Chemistry and Chemical Engineering Sun Yat-Sen University Guangzhou 510275 China College of Science Guangdong Ocean University Zhanjiang 524088 China

Cu nanoclusters were electrochemically deposited on the film of a Nafion-solubilized multi-wall carbon nanotubes (CNTs) modified glassy carbon electrode (CNTs-GCE), which fabricated a Cu-CNTs composite sensor (Cu-CNTs-GCE) to detect glucose with non-enzyme. The linear range is 7.0 × 10?7 to 3.5 × 10?3 mol/L with a high sensitivity of 17.76 μA/(mmol L), with a low detection limit 2.1 × 10?7 mol/L, fast response time (within 5 s), good reproducibility and stability.

关键词： Copper nanoclusters Carbon nanotubes Glucose Non-enzymatic sensor Electrodeposition

A Systematic Approach for Designing Analytical Dynamics and Servo Control of Constrained Mechanical Systems

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IEEE/CAA Journal of Automatica Sinica 2015年第4期2卷 382-393页

作者： Xiaoli Liu Shengchao Zhen kang huang Han Zhao Ye-Hwa Chen Ke Shao Hefei University of Technology Georgia Institute of Technology

A systematic approach for designing analytical dynamics and servo control of constrained mechanical systems is proposed. Fundamental equation of constrained mechanical systems is first obtained according to Udwadia-Kalaba approach which is applicable to holonomic and nonholonomic constrained systems no matter whether they satisfy the D'Alember's principle. The performance specifications are modeled as servo constraints. Constraint-following servo control is used to realize the servo constraints. For this inverse dynamics control problem, the determination of control inputs is based on the Moore-Penrose generalized inverse to complete the specified motion. Secondorder constraints are used in the dynamics and servo control. Constraint violation suppression methods can be adopted to eliminate constraint drift in the numerical simulation. Furthermore, this proposed approach is applicable to not only fully actuated but also underactuated and redundantly actuated mechanical systems. Two-mass spring system and coordinated robot system are presented as examples for illustration. © 2014 Chinese Association of Automation.

关键词： Dynamics Inverse problems Numerical methods Pneumatic control equipment

Highly Conductive Proton Selectivity Membrane Enabled by Hollow Carbon Sieving Nanospheres for Energy Storage Devices

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Engineering 2023年第9期28卷 69-78页

作者： kang huang Shuhao Lin Yu Xia Yongsheng Xia Feiyan Mu Yuqin Lu Hongyan Cao Yixing Wang Weihong Xing Zhi Xu State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China State Key Laboratory of Chemical Engineering School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China

Ion conductive membranes(ICMs)with highly conductive proton selectivity are of significant importance and greatly desired for energy storage ***,it is extremely challenging to construct fast proton-selective transport channels in ***,a membrane with highly conductive proton selectivity was fabricated by incorporating porous carbon sieving nanospheres with a hollow structure(HCSNs)in a polymer *** to the precise ion sieving ability of the microporous carbon shells and the fast proton transport through their accessible internal cavities,this advanced membrane presented a proton conductivity(0.084 S·cm^(-1))superior to those of a commercial Nation 212(N212)membrane(0.033S·cm^(-1))and a pure polymer membrane(0.049 S·cm^(-1)).The corresponding proton selectivity of the membrane(6.68×10^(5) S·min·cm^(-3))was found to be enhanced by about 5.9-fold and 4.3-fold,respectively,compared with those of the N212 membrane(1.13×10^(5) S·min·cm^(-3))and the pure membrane(1.56×10^(5) S·min·cm^(-3)).Low-field nuclear magnetic resonance(LF-NMR)clearly revealed the fast protonselective transport channels enabled by the HCSNs in the polymeric *** proposed membrane exhibited an outstanding energy efficiency(EE)of 84%and long-term stability over 1400 cycles with a0.065%capacity decay per cycle at 120 mA·cm^(-2) in a typical vanadium flow battery(VFB)system.

关键词： Ion conductive membrane Hollow carbon sieving nanosphere Proton transport channel Flow battery

活性炭对VOCs的吸附性能与其特征值之间的关系

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中国环境科学 2024年第8期44卷 4193-4201页

作者：熊烨栋柯权力黄康康闵炯金传敏章佩丽顾震宇翁小乐卢晗锋浙江工业大学化学工程学院浙江杭州310000 浙江悦胜环境科技有限公司浙江湖州313300 台州市环境科学设计研究院浙江台州318000 浙江省生态环境科学设计研究院浙江杭州310000 浙江大学环境与资源学院浙江杭州310000

以甲苯为典型VOCs废气分子,考察了不同活性炭样品的碘值、四氯化碳吸附率(CTC值)、总比表面积和微孔比表面积与其动态甲苯平衡吸附容量的关系.结果发现,无论是低浓度还是高浓度的甲苯废气,CTC值均与活性炭的吸附容量呈现较高的线性相关... 详细信息

以甲苯为典型VOCs废气分子,考察了不同活性炭样品的碘值、四氯化碳吸附率(CTC值)、总比表面积和微孔比表面积与其动态甲苯平衡吸附容量的关系.结果发现,无论是低浓度还是高浓度的甲苯废气,CTC值均与活性炭的吸附容量呈现较高的线性相关性,相关系数R 2高于0.92,而碘值只在低浓度条件下与活性炭吸附容量相关性较好,这表明CTC值相比碘值是更适合表征活性炭VOCs吸附性能的特征指标.此外,以含氧类VOCs(乙酸乙酯)为吸附质,CTC值也同样显示出与吸附容量优良的相关性.除活性炭外,本文还将上述方法拓展至硅胶、分子筛、碳硅复合材料等其他多孔吸附材料,结果证明CTC值可以用来指代不同多孔吸附材料的VOCs吸附性能,相对误差在30%以内,表明CTC值作为一个吸附特征指标具有良好的普适性.

关键词：活性炭 VOCs吸附量四氯化碳吸附率(CTC值) 碘值

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HAT疗法治疗脓毒症休克的临床疗效观察

天津医药 2024年第8期52卷 825-829页

作者：戴瑶方向黄康冯洁刘敏伍松柏长沙市第一医院重症医学科 410005

目的探讨氢化可的松、维生素C及维生素B1(HAT)疗法治疗脓毒症休克的效果及对血管活性药物应用时间、血流动力学参数及近期预后的影响。方法92例脓毒症休克患者,根据治疗方案的不同分为HAT组和常规治疗组,各46例。常规治疗组给予抗感染... 详细信息

目的探讨氢化可的松、维生素C及维生素B1(HAT)疗法治疗脓毒症休克的效果及对血管活性药物应用时间、血流动力学参数及近期预后的影响。方法92例脓毒症休克患者,根据治疗方案的不同分为HAT组和常规治疗组,各46例。常规治疗组给予抗感染、补液、稳定血压、连续性肾脏替代治疗(CRRT),HAT组在常规治疗组基础上给予HAT疗法辅助治疗,均连续治疗3 d。比较2组疗效相关指标和治疗前后急性生理与慢性健康(APACHEⅡ)评分、序贯器官衰竭评估(SOFA)评分、平均动脉压(MAP)、心率(HR)、中心动脉压(CAP)和D-乳酸(D-Lac)、肌酐(Cr)、超敏C反应蛋白(hs-CRP)、降钙素原(PCT)水平、不良反应发生率及随访28 d生存率。结果HAT组循环稳定时间、血管活性药物应用时间、激素使用时间、机械通气时间、CRRT时间、ICU治疗时间和总住院时间短于常规治疗组(P<0.05);治疗后,HAT组APACHEⅡ评分、SOFA评分、HR、D-Lac、Cr、hs-CRP和PCT水平低于常规治疗组,MAP、CAP高于常规治疗组(P<0.05);HAT组28 d生存率为65.22%,高于常规治疗组的45.65%(P<0.05)。结论HAT疗法可提高脓毒症休克患者临床疗效,缩短血管活性药物应用时间,改善血流动力学参数及近期预后。

关键词：休克,脓毒性氢化可的松维生素C 维生素B1 血流动力学近期预后

Bioinspired sensing-memory-computing integrated vision systems: biomimetic mechanisms, design principles, and applications

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Science China(Information Sciences) 2024年第5期67卷 5-27页

作者： Yujie huang Yinlong TAN Yan kang Yabo CHEN Yuhua TANG Tian JIANG Institute for Quantum Information and State Key Laboratory of High Performance Computing College of Computer National University of Defense Technology College of Advanced Interdisciplinary Studies National University of Defense Technology Institute for Quantum Science and Technology College of ScienceNational University of Defense Technology

With the explosion of sensory data in the Internet of Things(Io T) era, conventional machine vision systems are becoming increasingly difficult to meet the requirements of high efficiency, low energy consumption, and low latency due to their inherent shortcomings of separate sensing, memory, and computing units. Inspired by the retina and neuromorphic computing, the sensing-memory-computing integrated vision system(SMCVS) that features low power consumption, low latency, and high parallelism has been considered a promising technology to surpass the von Neumann architecture and realize strong artificial ***, novel materials like two-dimensional semiconductors and quantum dots with novel optoelectronic performance provide hardware carriers for implementing integrated sensing-memory-computing architectures,attracting considerable attention. This paper reviews the recent research progress in bioinspired vision systems in terms of biomimetic mechanisms, design principles, computational architectures, and ***, the biomimetic mechanisms are illustrated to guide the design of high-performance artificial visual perception systems. Then the research progress of optoelectronic-synapse-based bioinspired vision systems in the device principles and applications including image filtering, color recognition, visual adaptation, and motion detection are summarized. Finally, the challenges and future developing directions of the SMCVS are provided regarding bionic application, architecture design, and device fabrication.

关键词： sensing-memory-computing architecture neuromorphic computing retinomorphic device image recognition visual system

Comparative analysis of different cyclosporine A doses on protection after myocardial ischemia/reperfusion injury in rat

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Asian Pacific Journal of Tropical Medicine 2014年第2期7卷 144-148页

作者： kang huang Shi-Juan Lu Jiang-Hua Zhong Qun Xiang Liu Wang Miao Wu Department of Cardiology Haikou People's Hospital

Objective:To investigate the protective effect of different cyclosporin A(CsA)doses on myocardial ischemia/reperfusion injury in rat ***:A rat model of myocardial ischemia/reperfusion injury was established in vivo and the rats were randomly divided into four groups:placebo(PBS;T1),low-dose(CsA dose:1.0 mg/kg:T2),medium-dose(CsA dose:2.5 mg/kg:T3),and high-dose(CsA dose:5.0 mg/kg;T4)*** function indexes were monitored at different time points,the extent of myocardial infarction was assessed by Evans Blue-TTC staining,and creatine kinase MB mass and cardiac troponin 1 values were measured by biochemical ***:Compared with the T1 and T2 groups,both the creatine kinase MB mass and cardiac troponin 1 were significantly lower in the T3 and T4 groups(P<0.05).The mean arterial pressure(MAP)and left ventricular systolic pressure(LVSP)decreased sequentially in each group,with the extending reperfusion *** decreases in LVSP and MAP were observed in the T3 and T4 groups as compared to the T1 and T2 group(P<0.05)and the T2 group showed a significantly lower LVSP and MAP decline than the T1 group(P<0.05).Compared with the Tl group,the rats from the T2.T3,and T4 groups suffered from a significantly lower extent of myocardial infarction(P<0.05).Also,the a animals in the T3 and T4 groups had a significantly smaller extent of myocardial infarction than those in the T2 group(P<0.05).Conclusions:Various CsA doses exert different degrees of protection against ischemia/reperfusion injury,and this protective effect peaks at approximately 2.5 mg/kg in rat models.

关键词： Cyclosporin A Myocardial ischemia/reperfusion injury Mitochondrial permeability transition pore