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Design and optimization of W/Cu divertor mock-ups

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Journal of University of Science and Technology Beijing 2007年第2期14卷 157-159页

作者： Qiang li Weiping shen Lab of Special Ceramics and P/M Research and Training Center on Fusion Reactor Materials University of Science and Technology Beijing. Beijing 100083China

Tungsten is a promising candidate for plasma-facing materials to cover the surface of the divertor plate in the design of an international thermonuclear experimental reactor （ITER）. Copper as a heat sink material serves to transfer heat excellently. Divertor mock-ups with W/Cu graded interlayers were designed to reduce thermal stresses. Thermally induced stresses and temperature in a W/Cu divertor mock-up were analyzed using the finite element method. The graded structures with different exponents p and thick- nesses were designed and discussed. The conclusions drawn from these analyses are that thermal stresses reach the minimum and the temperature is suitable when exponent p is 1.5 and the thickness of five graded interlayers is 5 mm.

关键词： divertor mock-ups tungsten thermal stress

基于TOPSIS法综合评价法半夏抗慢性阻塞性肺疾病的品质研究

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中国药理学通报 2025年第1期41卷 138-146页

作者：邓军黄先菊李竣李啟恩麦合苏木·艾克木申李丹中南民族大学药学院湖北武汉430074 青海大学藏医药研究中心藏医学院藏药新药开发国家重点实验室青海西宁840016 新疆医科大学维吾尔医学院新疆乌鲁木齐830017

目的通过离散型逼近理想解排序法(technique for order preference by similarity to an ideal solution,TOPSIS)评估6批法半夏醇提物的体外抗慢性阻塞性肺疾病(chronic obstructive pulmonary disease,COPD)作用,建立法半夏综合品质评价新方法。方法采用香烟烟雾提取物(cigarette smoke extract,CSE)和脂多糖(lipopolysaccharide,LPS)构建Beas-2b人正常肺细胞的COPD模型,并使用MTT法测定生半夏及6批法半夏醇提取物的毒性和药效浓度,同时计算EC 50、IC 50;再由qRT-PCR、超氧化物歧化酶(superoxide dismutase,SOD)试剂盒测定相关指标;最后通过TOPSIS法对生半夏和法半夏进行多指标综合评价。结果根据IC 50值,得出各批次样品如下毒性排序:生半夏>法半夏④>法半夏①>法半夏⑤>法半夏③>法半夏⑥>法半夏②。通过qRT-PCR法验证得出,与模型组对比,各半夏给药组的TNF-α、IL-6和IL-8的表达均有不同程度的下调;并且在给药后所有给药组的SOD的含量均降低。将所有数据进行归一化处理,通过TOPSIS分析,得到药效综合排序结果如下:法半夏⑥>法半夏⑤>法半夏②>法半夏①>法半夏③>法半夏④>生半夏。结论不同半夏醇提物均可抑制LPS和CSE诱导的炎症和氧化应激,综合评价第⑥批法半夏的质量最好,且TOPSIS法可以作为一种药材的综合品质评定方法,为市面上参差不齐的药材质量提供质控思路。

关键词：法半夏生半夏 COPD Beas-2b细胞 TOPSIS 香烟烟雾提取物

A New Species of the Genus Nanorana Günther,1896(Anura:Dicroglossidae)from Hengduan Mountains of China

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Asian Herpetological Research 2023年第4期14卷 300-318页

作者： Feirong JI shengchao SHI shun MA Cheng shen liming CHANG Jianping JIANG Chengdu Institute of Biology Chinese Academy of SciencesChengdu 610041SichuanChina University of Chinese Academy of Sciences Beijing 100049China Mangkang Biodiversity and Ecological Station Tibet Ecological Safety Monitor NetworkChangdu 854500XizangChina

An integrative study based on morphological data and mitochondrial molecular data of all known Nanorana(sensu stricto)species have revealed a new species from the Hengduan Mountains,*** *** new species can be distinguished from its congers by its:(1)medium body size,SVL 31.3–40.6 mm in adult males(n=12),39.2–48.1 mm in adult females(n=8);(2)absence of subarticular tubercles on fingers,with supernumerary tubercles below the base of the fingers small but distinct;(3)presence of dark dorsal patches without pale margins,generally creamy yellow ventral body basically,bright yellow ventral limbs;(4)small but prominent tympanum;(5)tibio-tarsal joint that reaches to the tympanum or the shoulder when hindlimbs adpressed forward towards body;(6)head length more than 30%of *** addition,the new species can be separated from all other congeners by uncorrected genetic distances:ranging from 2.8%–7.5%of the mitochondrial 12S rRNA,1.1%–2.1%of the 16S rRNA,and 7.5%–11.5%of the COI.

关键词： Hengduan Mountains Nanorana huangi sp.nov. new species taxonomy

Packet track and traceback mechanism against denial of service attacks

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The Journal of China Universities of Posts and Telecommunications 2008年第3期15卷 51-58页

作者： li li shen Su-bin Institute of Information Network Technology Nanjing University of Posts and Telecommunications Nanjing 210003 China

The denial of service attack is a main type of threat on the Internet today. On the basis of path identification （Pi） and Internet control message protocol （ICMP） traceback （iTrace） methods, a packet track and traceback mechanism is proposed, which features rapid response and high accuracy. In this scheme, routers apply packet marking scheme and send traceback messages, which enables the victim to design the path tree in peace time. During attack times the victim can trace attackers back within the path tree and perform rapid packet filtering using the marking in each packet. Traceback messages overcome Pi＇s limitation, wherein too much path information is lost in path identifiers; whereas path identifiers can be used to expedite the design of the path-tree, which reduces the high overhead in iTrace. Therefore, our scheme not only synthesizes the advantages but also compromises the disadvantages of the above two methods. Simulation results with NS-2 show the validity of our scheme.

关键词： denial of service (DoS) attack traceback packet marking Pi

shen in Acupuncture for Chronic Pain

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Chinese Medicine and Culture 2022年第4期5卷 228-233页

作者： Yong-shun Bei New York College of Traditional Chinese Medicine MineolaNew York 11501USA

Chronic pain is one of the major complaints from patients seen in all acupuncture *** most common principle to treat pain with acupuncture is to activate channels to relieve pain;however,little attention has been paid to treating the patient’s shen when treating their *** article is an introduction to the incorporation of the treatment of shen when treating chronic pain with *** discussion of the shen and its treatments in this article are based on the review and study of the theories and principles in the ancient classics of traditional Chinese *** is the interaction between yin and *** is the governor of life;it controls all physical and mental *** enables us to feel *** disorders of shen in pain sufferers can negatively affect how they feel or recognize pain,how they response to pain and how they report their pain *** should pay more attention to the treatment of patient’s shen during the entire treatment course of chronic *** shen is the key to acupuncture efficacy;the essential principles are harmonizing yin and yang by needling techniques and regulating hun and po at the needling sites.

关键词： Acupuncture Chronic pain Hun Po shen

Moving object detection in framework of compressive sampling

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Journal of Systems Engineering and Electronics 2010年第5期21卷 740-745页

作者： Jing li JunzhengWang Wei shen Key Laboratory of Complex System Intelligent Control and Decision School of Automation Beijing Institute of Technology Beijing 100081 P. R. China

Compressive sensing is a revolutionary idea proposed recently to achieve much lower sampling rate for *** the image application with limited resources the camera data can be stored and processed in compressed *** algorithm for moving object and region detection in video using a compressive sampling is *** algorithm estimates motion information of the moving object and regions in the video from the compressive measurements of the current image and background *** algorithm does not perform inverse compressive operation to obtain the actual pixels of the current image nor the estimated *** leads to a computationally efficient method and a system compared with the existing motion estimation *** experimental results show that the sampling rate can reduce to 25% without sacrificing performance.

关键词： compressive sampling compressive measurements moving object detection.

Research on the Algorithm of Avionic Device Fault Diagnosis Based on Fuzzy Expert System

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Chinese Journal of Aeronautics 2007年第3期20卷 223-229页

作者： li Jie shen Shi-tuan School of Electronics and Information Engineering Beijing University of Aeronautics and Astronautics Beijing 100083 China

Based on the fuzzy expert system fault diagnosis theory, the knowledge base architecture and inference engine algorithm are put forward for avionic device fault diagnosis. The knowledge base is constructed by fault query network, of which the basic ele- ment is the test-diagnosis fault unit. Every underlying fault cause＇s membership degree is calculated using fuzzy product inference algorithm, and the fault answer best selection algorithm is developed, to which the deep knowledge is applied. Using some examples the proposed algorithm is analyzed for its capability of synthesis diagnosis and its improvement compared to greater membership degree first principle.

关键词： fuzzy expert system fault query network fault answer best selection algorithm fuzzy theory test-diagnosis fault unit

Magic of hydrogen spillover: Understanding and application

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Green Energy & Environment 2022年第6期7卷 1161-1198页

作者： Haifang shen Hao li Zhensheng Yang Chunli li National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization Tianjin Key Laboratory of Chemical Process SafetySchool of Chemical Engineering and TechnologyHebei University of Technology8 Guangrong RoadTianjin300130China

The hydrogen spillover effect(HSPE)plays an important role in heterogeneous catalysis and hydrogen storage as an interfacial phenomenon,which facilitates the improvement of hydrogen storage properties of porous nanomaterials and indirectly or directly affects the reaction performance of multiphase catalytic *** setting-up of the word“hydrogen spillover”opened up a new area to gain insight into the dynamic behavior of migrating hydrogen atoms on a catalyst ***,a comprehensive understanding of the HSPE is still ***,the development of advanced characterization techniques provides increasingly valuable information to further our understanding of the *** on these considerations,in this review,we hope to provide some answers to the question“What is hydrogen spillover and how do we recognize it?”.To do this,we will rely on advanced characterization techniques as well as experimental and theoretical ***,we discuss in detail the influences of the HSPE on hydrogen storage performance and the important catalytic effects of the HSPE in *** effects will be reviewed by looking through the catalytic results obtained in many reactions in thermal catalysis,electrocatalysis,and ***,based on the application potential of hydrogen spillover,we present some preliminary research proposals and discuss the opportunities and challenges that remain to be faced in this research area.

关键词： Hydrogen spillover Characterization Hydrogen storage Catalysis Spillover mechanism

Auto-parametric resonance of a continuous-beam-bridge model under two-point periodic excitation:an experimental investigation and stability analysis

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Earthquake Engineering and Engineering Vibration 2024年第2期23卷 445-454页

作者： li Yuchun shen Chao liu Wei li Dong Department of Hydraulic Engineering College of Civil EngineeringTongji UniversityShanghai 200092China

The auto-parametric resonance of a continuous-beam bridge model subjected to a two-point periodic excitation is experimentally and numerically investigated in this *** auto-parametric resonance experiment of the test model is conducted to observe and measure the auto-parametric resonance of a continuous beam under a two-point excitation on *** parametric vibration equation is established for the test model using the finite-element *** auto-parametric resonance stability of the structure is analyzed by using Newmark's method and the energy-growth exponent *** effects of the phase difference of the two-point excitation on the stability boundaries of auto-parametric resonance are studied for the test *** with the experiment,the numerical instability predictions of auto-parametric resonance are consistent with the test phenomena,and the numerical stability boundaries of auto-parametric resonance agree with the experimental *** a continuous beam bridge,when the ratio of multipoint excitation frequency(applied to the columns)to natural frequency of the continuous girder is approximately equal to 2,the continuous beam may undergo a strong auto-parametric *** with the present experiment and analysis,a hypothesis of Volgograd Bridge's serpentine vibration is discussed.

关键词： auto-parametric resonance continuous beam bridge model two-point excitation experimental investigation stability analysis vibration of Volgograd Bridge