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Rare Metals 2024年第4期43卷 1815-1827页

作者： sheng-feng zhou Yu Long Yan-Liang Yi Cheng Deng Lian-Xi Hu Institute of Advanced Wear&Corrosion Resistant and Functional Materials Jinan UniversityGuangzhou510632China Wuhan National Laboratory for Optoelectronics(WNLO) Huazhong University of Science and TechnologyWuhan430074China MOE Key Laboratory of New Processing Technology for Non-Ferrous Metals and Materials Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured MaterialsGuangxi UniversityNanning530004China School of Mechatronics Engineering Guangdong Polytechnic Normal UniversityGuangzhou510635China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin150001China

To improve the wear performance of CoCrAlYTa coating,part of the carbon nanotubes(CNTs)chemically reacted with Ta to form reinforcement phase(TaC),while the other CNTs were retained as lubrication ***,the CoCrAlYTa-xCNTs(x=0,1,2,and 4;wt%)composite coatings were prepared by laserinduction hybrid cladding(LIHC),and the microstructure and wear resistance of coatings were systematically *** show that the coatings are mainly composed of TaC,y-(Co,Cr)andβ-(Co,Cr)*** the CNTs content increases from 0 wt%to 4 wt%,the volume fraction of TaC increases from 13.11 vol%to 16.12 vol%.Meanwhile,the nano-hardness ofγ-(Co,Cr)andβ-(Co,Cr)Al are improved from 7.49 and 9.72 to 9.36 and 11.19 GPa,*** a result,the microhardness of coating increases from HV536.25 to HV 738.16,the wear rate decreases from32.4×10^(-3)to 6.1×10^(-3)mg·m^(-1),and the average friction coefficient decreases from 0.55 to *** good wear performance of the coating is attributed to the formation of TaC and the existence of remained CNTs lubricant film.

关键词： Carbon nanotube MCrAlY coating Friction and wear performance Laser-induction hybrid cladding

Analyzing the service availability of mobile cloud computing systems by fluid-flow approximation

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Frontiers of Information Technology & Electronic Engineering 2015年第7期16卷 553-567页

作者： Hong-wu LV Jun-yu LIN Hui-qiang WANG Guang-sheng feng Mo zhou College of Computer Science and Technology Harbin Engineering University Harbin 150001 China

Mobile cloud computing （MCC） has become a promising technique to deal with computation- or data-intensive tasks. It overcomes the limited processing power, poor storage capacity, and short battery life of mobile devices. Providing continuous and on-demand services, MCC argues that the service must be available for users at anytime and anywhere. However, at present, the service availability of MCC is usually measured by some certain metrics of a real-world system, and the results do not have broad representation since different systems have different load levels, different deployments, and many other random factors. Meanwhile, for large-scale and complex types of services in MCC systems, simulation-based methods （such as Monte- Carlo simulation） may be costly and the traditional state-based methods always suffer from the problem of state-space explosion. In this paper, to overcome these shortcomings, fluid-flow approximation, a breakthrough to avoid state-space explosion, is adopted to analyze the service availability of MCC. Four critical metrics, including response time of service, minimum sensing time of devices, minimum number of nodes chosen, and action throughput, are def＇med to estimate the availability by solving a group of ordinary differential equations even before the MCC system is fully deployed. Experimental results show that our method costs less time in analyzing the service availability of MCC than the Markov- or simulation-based methods.

关键词： Service availability Mobile cloud computing Fluid-flow approximation Ordinary differential equations

Hepatic　arterial　infusion　chemotherapy　and　embolization　in　the　treatment　of　primary　hepatic　carcinoma

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World Journal of Gastroenterology 1997年第2期3卷 47-50页

作者： ZHENG Chuan sheng, feng Gan sheng, zhou Ru Ming, LIANG Bo, LIANG Hui Min, ZHEN Jun, YU Jian Ming and LIU Hui

AIM To study the effects of hepatic arterial infusion chemotherapy (HAI) or embolization (HAE) in the treatment of primary hepatic carcinoma (PHC) and the factors influencing the effects. METHODS Follow up information in 188 patients (166 males and 22 females) with PHC treated with HAI ( n =82) or HAE ( n =106) were analyzed retrospectively. RESULTS The overall therapeutic effects were as follows: symptomatic relief in 59 6%; tumor shrinkage in 55%, blood AFP decrease in 37 8% and the overall survival rates of 1/2, 1, 2 and 3 years after treatment being 75 4%, 46%, 23 5% and 14 7%, respectively. The mean survival time was 12 2 months and the longest survival period was 50 months after treatment. In the HAI group the 1/2, 1, 2 and 3 years survival rates were 61 0%, 25 4%, 4 5% and 0%, respectively, the mean survival time being 7 7 months; in the HAE group the survival rates were 86 8%, 61 7%, 37 8% and 26 1%, respectively, the mean survival time being 15 7 months. Eighteen patients received secondary surgery. Seven factors influencing the therapeutic effects were analyzed. CONCLUSION Those cases of PHC with or without mild liver cirrhosis, stages Ⅰ and Ⅱ, single tumor, tumor size less than 10cm in diameter, no cancerous thrombus within the portal vein or hepatic arterio venous fistula, and HAE treatment time more than 3 times had better therapeutic effects than the contrast cases. To overcome these influencing factors and to adopt the comprehensive therapy would improve the effects of HAI or HAE in the treatment of PHC.

关键词： liver neoplasms/therapy chemoembolization, therapeutic

Effect of Fe content on microstructure and mechanical properties of Cu-Fe-based composite coatings by laser induction hybrid rapid cladding

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Transactions of Nonferrous Metals Society of China 2016年第12期26卷 3196-3204页

作者： sheng-feng zhou Jian-bo LEI Zheng XIONG Jin-bo GUO Zhen-jie GU Hong-bo PAN Laser Technology Institute Tianjin Polytechnic University Tianjin 300387 China School of Science Naval University of Engineering Wuhan 430033 China Engineering Research Institute Anhui University of Technology Ma’anshan 243002 China

To select the proper composition and obtain an overall material?microstructure?property relationship for Cu?Fe alloy, theeffect of Fe content on microstructure and properties of Cu?Fe-based composite coatings by laser induction hybrid rapid claddingwas investigated. Microstructure characterization of the composite coatings was tested utilizing SEM, XRD and EDS. Microhardnessmeasurement was executed to evaluate the mechanical properties of the composite coatings. The results show that for low Fe content,the composite coating presents a feature that Fe-rich equiaxed dendrites are embedded in the Cu-rich matrix. With increasing Fecontent, the Fe-rich particles are dispersed in the Cu-rich matrix. With further increasing Fe content, large amounts of Cu-richparticles are homogeneously dispersed in the interdendrite of the Fe-rich matrix. Correspondingly, the average microhardness of thecomposite coatings increases gradually with the increase of Fe content and the microhardness of Cu14.5Fe83Si2C0.5 coating is muchtwice higher than that of the substrate.

关键词： composite coating laser induction hybrid rapid cladding Cu.Fe alloy liquid phase separation microstructure mechanical properties

The Generation of Eukaryotic Expression Vectors of shRNA Specific for Stat6

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生物医学工程学杂志 2005年第S1期22卷 73-74页

作者： Ming-sheng ZHANG Yun-feng zhou~Δ Zhi-Guo LUO Jian-Ping WU Wen Jie ZHANG(Department of Radio-Chemotherapy, Zhongnan Hospital, Cancer Research Center, Wuhan University,Wuhan 430071, China)

Fabrication of lightweight 3D interpenetrated NiTi@Mg composite with superior bending properties

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Transactions of Nonferrous Metals Society of China 2024年第11期34卷 3569-3584页

作者： Yu-jing LIU Xiao-chun LIU Kun-mao LI Xiang WU sheng-feng zhou Wei LI Wen-cai ZHANG Institute of Metals School of Materials Science and EngineeringChangsha University of Science&TechnologyChangsha 410004China Institute of Advanced Wear&Corrosion Resistance and Functional Materials Jinan UniversityGuangzhou 510632China State Key Laboratory of Mechanical Transmissions Chongqing UniversityChongqing 400044China Department of Orthopedics First Affiliated HospitalJinan UniversityGuangzhou 510632China

A NiTi@Mg interpenetrating phase composite with high strength and lightweight was prepared by additive manufacturing(AM)and infiltration technology,and the interface bonding,three-point bending properties and cyclic compressive properties of NiTi@Mg composites were *** results show that the metallurgically bonded interface is formed at the NiTi/Mg *** bending strength and compressive strength of the NiTi@Mg composite are 2.5 and 1.7 times higher than those of the NiTi scaffold,*** the bending deformation process,a large number of dislocations are observed to accumulate in the soft Mg area at the ***,the finite element model showed that the stress accumulation area,where the bending crack is initiated,is located at the interface of NiTi and *** strengthening mechanism of NiTi@Mg composites is attributed to the twinning strengthening of Mg and heterogeneous structure strengthening.

关键词： metal composites NiTi@Mg bending properties finite element simulation strengthening mechanism

Bioinspired Passive Tactile Sensors Enabled by Reversible Polarization of Conjugated Polymers

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Nano-Micro Letters 2025年第1期17卷 361-377页

作者： feng He Sitong Chen Ruili zhou Hanyu Diao Yangyang Han Xiaodong Wu School of Mechanical Engineering Sichuan UniversityChengdu 610065People’s Republic of China School of Software Engineering Chongqing University of Posts and TelecommunicationsChongqing 400065People’s Republic of China State Key Laboratory of Polymer Materials Engineering Sichuan UniversityChengdu 610065People’s Republic of China

Tactile perception plays a vital role for the human body and is also highly desired for smart prosthesis and advanced *** to active sensing devices,passive piezoelectric and triboelectric tactile sensors consume less power,but lack the capability to resolve static ***,we address this issue by utilizing the unique polarization chemistry of conjugated polymers for the first time and propose a new type of bioinspired,passive,and bio-friendly tactile sensors for resolving both static and dynamic ***,to emulate the polarization process of natural sensory cells,conjugated polymers(including poly(3,4-ethylenedioxythiophen e):poly(styrenesulfonate),polyaniline,or polypyrrole)are controllably polarized into two opposite states to create artificial potential *** controllable and reversible polarization process of the conjugated polymers is fully in situ ***,a micro-structured ionic electrolyte is employed to imitate the natural ion channels and to encode external touch stimulations into the variation in potential difference *** with the currently existing tactile sensing devices,the developed tactile sensors feature distinct characteristics including fully organic composition,high sensitivity(up to 773 mV N^(−1)),ultralow power consumption(nW),as well as superior *** demonstrations,both single point tactile perception(surface texture perception and material property perception)and two-dimensional tactile recognitions(shape or profile perception)with high accuracy are successfully realized using self-defined machine learning *** tactile sensing concept innovation based on the polarization chemistry of conjugated polymers opens up a new path to create robotic tactile sensors and prosthetic electronic skins.

关键词： Passive tactile sensors Reversible polarization of conjugated polymers Tactile perception Machine learning algorithm Object recognition

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永磁同步风力发电机的VSG参数自适应控制

电力电子技术 2021年第7期55卷 103-107页

作者：于海洋李岚靳杰冯胜洲太原理工大学电气与动力工程学院山西太原030024

在永磁同步风力发电系统中,为了克服网侧变流器采用虚拟同步发电机(VSG)控制策略时,由于虚拟转动惯量和虚拟阻尼系数恒定导致频率不能灵活控制这一缺点,将自适应控制应用到网侧变流器的VSG控制策略中。首先介绍永磁同步风力发电系统总... 详细信息

在永磁同步风力发电系统中,为了克服网侧变流器采用虚拟同步发电机(VSG)控制策略时,由于虚拟转动惯量和虚拟阻尼系数恒定导致频率不能灵活控制这一缺点,将自适应控制应用到网侧变流器的VSG控制策略中。首先介绍永磁同步风力发电系统总体的控制策略,建立网侧变流器VSG控制模型;在此基础上分析风速和负载的变化对系统功率和频率的影响,根据系统频率的变化实时调节算法中的参数,使参数可以在线修正。最后,通过仿真和实验证明所设计的控制策略能够减小系统频率在振荡过程中的变化幅度,并提高频率动态调节性能。

关键词：永磁同步风力发电机虚拟同步发电机自适应控制

Overexpression of low-density lipoprotein receptor prevents neurotoxic polarization of astrocytes via inhibiting NLRP3 inflammasome activation in experimental ischemic stroke

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Neural Regeneration Research 2025年第2期20卷 491-502页

作者： Shuai feng Juanji Li Tingting Liu Shiqi Huang Xiangliang Chen Shen Liu Junshan zhou Hongdong Zhao Ye Hong Department of Neurology Nanjing First HospitalNanjing Medical UniversityNanjingJiangsu ProvinceChina Department of Neurology Nanjing Jinling HospitalAffiliated Hospital of Medical SchoolNanjing UniversityNanjingJiangsu ProvinceChina

Neurotoxic astrocytes are a promising therapeutic target for the attenuation of cerebral ischemia/reperfusion ***-density lipoprotein receptor,a classic cholesterol regulatory receptor,has been found to inhibit NLR family pyrin domain containing protein 3(NLRP3)inflammasome activation in neurons following ischemic stroke and to suppress the activation of microglia and astrocytes in individuals with Alzheimer’s ***,little is known about the effects of low-density lipoprotein receptor on astrocytic activation in ischemic *** address this issue in the present study,we examined the mechanisms by which low-density lipoprotein receptor regulates astrocytic polarization in ischemic stroke ***,we examined low-density lipoprotein receptor expression in astrocytes via immunofluorescence staining and western blotting *** observed significant downregulation of low-density lipoprotein receptor following middle cerebral artery occlusion reperfusion and oxygen-glucose deprivation/***,we induced the astrocyte-specific overexpression of low-density lipoprotein receptor using astrocyte-specific adeno-associated ***-density lipoprotein receptor overexpression in astrocytes improved neurological outcomes in middle cerebral artery occlusion mice and reversed neurotoxic astrocytes to create a neuroprotective ***,we found that the overexpression of low-density lipoprotein receptor inhibited NLRP3 inflammasome activation in oxygen-glucose deprivation/reoxygenation injured astrocytes and that the addition of nigericin,an NLRP3 agonist,restored the neurotoxic astrocyte *** findings suggest that low-density lipoprotein receptor could inhibit the NLRP3-meidiated neurotoxic polarization of astrocytes and that increasing low-density lipoprotein receptor in astrocytes might represent a novel strategy for treating cerebral ischemic stroke.

关键词： inflammation ischemia/reperfusion injury ischemic stroke low-density lipoprotein receptor neuroprotective astrocytes neurotoxic astrocytes NLRP3 inflammasome polarization

An Efficient Boron Source Activation Strategy for the Low‑Temperature Synthesis of Boron Nitride Nanotubes

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Nano-Micro Letters 2025年第1期17卷 548-558页

作者： Ying Wang Kai Zhang Liping Ding Liyun Wu Songfeng E Qian He Nanyang Wang Hui Zuo Zhengyang zhou feng Ding Yue Hu Jin Zhang Yagang Yao National Laboratory of Solid State Microstructures College of Engineering and Applied SciencesJiangsu Key Laboratory of Artificial Functional Materialsand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093People’s Republic of China School of Electronic Information and Artificial Intelligence Shaanxi University of Science&TechnologyXian 710000People’s Republic of China College of Bioresources Chemical and Materials Engineering Shaanxi University of Science&TechnologyXian 710000People’s Republic of China Key Laboratory of Carbon Materials of Zhejiang Province College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325000People’s Republic of China Shenzhen Institutes of Advanced Technology Chinese Academy of SciencesShenzhen 518000People’s Republic of China College of Chemical and Molecular Engineering Peking UniversityBeijing 100871People’s Republic of China

Lowering the synthesis temperature of boron nitride nanotubes(BNNTs)is crucial for their *** primary reason for adopting a high temperature is to enable the effective activation of highmelting-point solid *** this study,we developed a novel approach for efficiently activating boron by introducing alkali metal compounds into the conventional MgO–B *** approach can be adopted to form various low-melting-point AM–Mg–B–O growth *** growth systems have improved catalytic capability and reactivity even under low-temperature conditions,facilitating the synthesis of BNNTs at temperatures as low as 850℃.In addition,molecular dynamics simulations based on density functional theory theoretically demonstrate that the systems maintain a liquid state at low temperatures and interact with N atoms to form BN *** findings offer novel insights into the design of boron activation and are expected to facilitate research on the low-temperature synthesis of BNNTs.

关键词： Boron nitride nanotubes Low-temperature Boron activation Density functional theory