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Rare Metals 2024年第11期 5953-5963页

作者： Min-Xuan Xu chun dou Teng-Yue Song Xin Li Qi Zhang Center for Advanced Optoelectronic Materials College of Materials and Environmental EngineeringHangzhou Dianzi University Key Laboratory of Novel Materials for Sensor of Zhejiang Province Hangzhou Dianzi University School of Mechanical Engineering Zhejiang University Department of Mechanical Engineering University of Tokyo

Recently,application-oriented strain sensor has been intensively investigated in the fields of human motion detection,personalized health management and portable medical *** significant efforts in improving its sensitivity and linear sensing range,developing the wearable strain sensor with stable signal remains a ***,we proposed an ideal hybrid material with nearly zero temperature coefficient resistance（TCR）for temperature-insensitive strain sensing:the silver nanostructures（AgNTs） were introduced to coat the graphene foam（GrF） conformably by hydrothermal *** nanoscaled metal additives（TCR> 0） not only endow GrF（TCR 3000 cycles）.Moreover,our strain sensor can be easily mounted on human skin as an epidermal device for reliable detection of electrophysiological stimuli,thus showing a great promising in practical wearable applications.

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基于多智能体系统的微电网安稳控制策略

科学技术与工程 2024年第11期24卷 4527-4538页

作者：李哲严婷窦春霞南京邮电大学自动化学院人工智能学院南京210023 南京邮电大学碳中和先进技术研究院南京210023

随着新能源渗透率不断提高,微电网在分布式能源(distributed energy resources,DERs)运行控制中的作用日益凸显,但分布式能源的接入会给微电网的运行带来扰动。为此,提出了一种基于多智能体系统(multi-agent system,MAS)的两级分散协调... 详细信息

随着新能源渗透率不断提高,微电网在分布式能源(distributed energy resources,DERs)运行控制中的作用日益凸显,但分布式能源的接入会给微电网的运行带来扰动。为此,提出了一种基于多智能体系统(multi-agent system,MAS)的两级分散协调控制方案来保证微电网的高安全性和稳定性。上层智能体基于Petri网(Petri-net,PN),针对各类能源的不同工作模式,构建DERs的PN模型,并以PN模型设计协调逻辑控制指令集,通过网格自适应直接搜索过滤算法(mesh adaptive direct search filter algorithm,MADSFA)选择最佳的协调逻辑控制指令。下层智能体负责局部连续控制,针对不同功率特性DERs的逆变器,分别采用不同的下垂控制策略。为保证暂稳态下微电网的稳定性,在逆变器和下垂控制器之间增设预设性能控制器,以确保逆变器的输出功率误差无论是在暂态还是稳态的情况下均能稳定在预设误差范围以内。同时为提高微电网系统的稳定性,两层之间的交互采用主从和无固定主从相结合的通信模式,这种交互机制提高了MAS在系统的实时监控过程中的时效性和灵活性。最后,仿真结果验证了基于MAS两级分散协调控制策略的有效性。

关键词： MAS 分散协调控制逻辑控制命令局部连续控制 MADSFA

Risk Factors for Diabetes and Cardiovascular Complications in the Chinese Population

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China CDC weekly 2023年第45期5卷 1017-1021页

作者： chun dou Dong Liu Tiange Wang Department of Endocrine and Metabolic Diseases Shanghai Institute of Endocrine and Metabolic DiseasesRuijin HospitalShanghai Jiao Tong University School of MedicineShanghaiChina Shanghai National Clinical Research Center for Metabolic Diseases Key Laboratory for Endocrine and Metabolic Diseases of the National Health Commission of the PR ChinaShanghai Key Laboratory for Endocrine TumorRuijin HospitalShanghai Jiao Tong University School of MedicineShanghaiChina.

Type 2 diabetes,a major noncommunicable disease,is typified by hyperglycemia,which stems from insulin resistance and dysfunction of pancreaticβ-cells(1).Prior multi-ethnic studies hypothesized that type 2 diabetes among Caucasians was primarily driven by insulin resistance,whereas in East Asians,it was predominantly a consequence ofβ-cell dysfunction(2).Apart from the apparent genetic variations,obesity has been identified as the main factor responsible for the pathophysiological differences in diabetes between Caucasians and East Asians(3).Notably,China has seen a considerable increase in obesity cases in congruence with substantial changes in lifestyle and urbanization over the last four *** a recent population-based national cohort study,we showed that insulin resistance,rather thanβ-cell dysfunction,had a significant role in the pathological progression of diabetes within the Chinese population(1).This correlation was particularly pronounced among obese adults(1).

关键词： obesity sized consequence

Combined Cloud： A Mixture of Voluntary Cloud and Reserved Instance Marketplace

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Journal of Computer Science & Technology 2016年第6期31卷 1110-1123页

作者： Wei Shen Wan-chun dou Fan Wu Shaojie Tang Qiang Ni State Key Laboratory for Novel Software Technology Nanjing University Nanjing 210046 China Department of Computer Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China Department of Information Systems University of Texas at Dallas Texas TX 75080 U.S.A. School of Computing and Communications Lancaster University Lancaster LA1 4WA U.K.

Voluntary cloud is a new paradigm of cloud computing. It provides an alternative selection along with some well-provisioned clouds. However, for the uncertain time span that participants share their computing resources in voluntary cloud, there are some challenging issues, i.e., fluctuation, under-capacity and low-benefit. In this paper, an architecture is first proposed based on Bittorrent protocol. In this architecture, resources could be reserved or requested from Reserved Instance Marketplace and could be accessed with a lower price in a short circle. Actually, these resources could replenish the inadequate resource pool and relieve the fluctuation and under-capacity issue in voluntary cloud. Then, the fault rate of each node is used to evaluate the uncertainty of its sharing time. By leveraging a linear prediction model, it is enabled by a distribution function which is used for evaluating the computing capacity of the system. Moreover, the cost optimization problem is investigated and a computational method is presented to solve the low-benefit issue in voluntary cloud. At last, the system performance is validated by two sets of simulations. And the experimental results show the effectiveness of our computational method for resource reservation optimization.

关键词： voluntary cloud system architecture resource reservation

H_∞ Robust Control of DC-AC Interfaced Microsource in Microgrids

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International Journal of Automation and computing 2013年第1期10卷 73-78页

作者： chun-Xia dou Fang Zhao Xing-Bei Jia Dong-Le Liu Institute of Electrical Engineering Yanshan University

This paper focuses on the direct current-alternating current （DC-AC） interfaced microsource based H∞ robust control strategies in microgrids. It presents detail of a DC-AC interfaced microsource model which is connected to the power grid through a controllable switch. A double loop current-regulated voltage control scheme for the DC-AC interface is designed. In the case of the load disturbance and the model uncertainties, the inner voltage and current loop are produced based on the H∞ robust control strategies. The outer power loop uses the droop characteristic controller. Finally, the scheme is simulated using the Matlab/Simulink. The simulation results demonstrate that DC-AC interfaced microsource system can supply high quality power. Also, the proposed control scheme can make the system switch smoothly between the isolated mode and grid-connected mode. 更多

关键词： Microgrid DC-AC interfaced microsource H∞ robust control f-v droop characteristic smooth switching

Assessment of Power Quality Based on D-S Evidence Theory

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International Journal of Automation and computing 2014年第6期11卷 635-643页

作者： chun-Xia dou Ting Gui Ye-Fei Bi Jin-Zhao Yang Xiao-Gang Li Institute of Electrical Engineering Yanshan University

Technological advancement of measurement systems has enhanced the accuracy of power quality assessment by using a combination of measured information. This paper proposes a novel approach for estimating power quality based on information fusion technique of Dempster-Shafer(D-S) evidence theory. First, in order to accurately extract transient features regarding power quality indexes, wavelet packet transform and lifting wavelet transform are proposed to detect various disturbance signals measurement. By using many kinds of transformed transient indexes and steady state indexes, a novel reliability distribution function is constructed,and synthesized assessment index of power quality is drafted based on information fusion technique of D-S evidence theory. Finally,the simulation results prove that D-S evidence theory is a more effective means for evaluating the power quality.

关键词： Power quality Dempster-Shafer (D-S) evidence theory information fusion technique wavelet packet transform lifting wavelet transform

Metallurgy of aluminum-inspired formation of aluminosilicate-coated nanosilicon for lithium-ion battery anode

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Rare Metals 2022年第6期41卷 1880-1888页

作者： Yu Zhou Peng-Hu Niu Zhong-Hua Li Pan-Pan Zhang Ming-Ru Su Ai-chun dou Xiao-Wei Li Yun-Jian Liu School of Material Science and Engineering.Jiangsu University Zhenjiang 212013China

Modification of Si anode with various coating matrixes is a promising strategy to resolve the unsta-ble solid electrolyte interphase ***,the com-plex preparation process and inherently weak interaction between Si and other matrixes impede its practical *** by the metallurgical process of aluminum,an aluminosilicate matrix was prepared as coating layer on the surface of Si nanoparticles after heat *** nanoparticles with a uniform native oxide layer were used as seed crystals for the adsorption of aluminum *** strong symbiosis and bond between alumina and silica,such as mullite(3Al_(2)O_(3)·2SiO_(2))or kaolin(Al2O_(3)·SiO_(2)·2H_(2)O),provide homogeneous and durable contact coating *** as-produced Si/SiO_(2)·Al_(2)O_(3)composite delivers a charge capacity of 1440 mAh·g^(-1)at 100 mA·g^(-1)and remains 879 mAh·g^(-1)at 3 A·g^(-1).After 200 cycles,the capacity retention remains high at 76%.The enhanced properties were ascribed to SiO_(2)·Al_(2)O_(3)syner-gistic composite coating layer,which could hinder the interfacial side chemical reaction and buffer volume change of Si.

关键词： Lithium-ion batteries Silicon anode Alumina coating Interface stability

The Property of Dichotomy for a Class of Interconnected Pendulum-like Systems

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自动化学报 2006年第1期32卷 91-95页

作者： LI Xin-Bin DUAN Zhi-Sheng NIAN Xiao-Hong dou chun-Xia Institute of Electrical Engineering Yanshan University Qinhuangdao 066004 Department of Mechanics and Engineering Science Peking University Beijing 100871 School of Information Science and Engineering Central South University Changsha 410083

The property of dichotomy of interconnected second-order pendulum-like systems with multiple equilibria is investigated. This interconnection can be viewed as harmonic control of independent sub-systems. Linear interconnections and a class of input and output interconnections are considered in this paper. The effects of input and output interconnections are shown through a permutation matrix. Frequency domain and linear matrix inequality (LMI) conditions of dichotomy of interconnected pendulum-like systems are derived. It is shown that global properties of two coupled systems can be changed significantly through interconnections. Examples are given to illustrate the results.

关键词：谐波控制系统二分法互联系统钟摆类似系统

Mechanism exploration of enhanced electrochemical performance of single-crystal versus polycrystalline LiNi_(0.8)Mn_(0.1)Co_(0.1)O_(2)

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Rare Metals 2022年第11期41卷 3783-3794页

作者： Tian-Yi Zeng Xiao-Yun Zhang Xing-Yu Qu Mei-Qing Li Pan-Pan Zhang Ming-Ru Su Ai-chun dou Ahmad Naveed Yu Zhou Yun-Jian Liu School of Material Science and Engineering Jiangsu UniversityZhenjiang212013China

Single-crystal LiNi_(0.8)Mn_(0.1)Co_(0.1)O_(2)(SC-811),which offers better cycle performance compared to the polycrystalline counterpart,has received great *** report herein the synthesis of SC-811 with a grain size of 2-4μm by washing and reheating method,which compares with conventional polycrystalline LiNi_(0.8)-Co_(0.1)Mn_(0.1)O_(2)(PC-811).The discharge capacity of SC-811 reaches 152.1 mAh·g^(-1)after 100 cycles(86.7%capacity retention)at 1.0 C,which is much better than that of PC-811(130.2 mAh·g^(-1),73.8%capacity retention).By using multiscale characterization,the results unveil that SC-811 can not only improve the reversibility of the H2-H3 phase transitions,suppress the generation of micro-cracks and phase transformations,but also mitigate the undesired side reactions between electrode and ***,the Li-O bond of SC-811 is longer than that of PC-811,which is conducive to the de-intercalation of Li-ions,thereby enhancing the structural *** finding provides an impressive strategy to sustain structural stability and improve the cycling life of Ni-rich layered cathodes.

关键词： Li-ion batteries(LIBs) Cathode materials Single-crystal Capacity retention Phase transitions

A comparison study on structure-function relationship of polysaccharides obtained from sea buckthorn berries using different methods:antioxidant and bile acid-binding capacity

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Food Science and Human Wellness 2024年第1期13卷 494-505页

作者： Qiaoyun Li Zuman dou Qingfei Duan chun Chen Ruihai Liu Yueming Jiang Bao Yang Xiong Fu SCUT-Zhuhai Institute of Modern Industrial Innovation School of Food Science and EngineeringSouth China University of Technology381 Wushan RoadGuangzhou 510640China Guangzhou Institute of Modern Industrial Technology Nansha 511458China Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety Guangzhou 510640China Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health(111 Center) Guangzhou 510640China Department of Food Science Stocking HallCornell UniversityIthaca 14853USA South China Botanical Garden Chinese Academy of SciencesGuangzhou 510650China

In this study,the structural characters,antioxidant activities and bile acid-binding ability of sea buckthorn polysaccharides(HRPs)obtained by the commonly used hot water(HRP-W),pressurized hot water(HRP-H),ultrasonic(HRP-U),acid(HRP-C)and alkali(HRP-A)assisted extraction methods were *** results demonstrated that extraction methods had significant effects on extraction yield,monosaccharide composition,molecular weight,particle size,triple-helical structure,and surface morphology of HRPs except for the major linkage *** analysis showed that HRP-U with filamentous reticular microstructure exhibited better thermal *** HRP-A with the lowest molecular weight and highest arabinose content possessed the best antioxidant ***,the rheological analysis indicated that HRPs with higher galacturonic acid content and molecular weight showed higher viscosity and stronger crosslinking network(HRP-C,HRP-W and HRP-U),which exhibited stronger bile acid binding *** present findings provide scientific evidence in the preparation technology of sea buckthorn polysaccharides with good antioxidant and bile acid binding capacity which are related to the structure affected by the extraction methods.

关键词： Sea buckthorn Extraction method Structure Rheological properties Antioxidant activity Bile acid binding capacity