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Mechanical wear debris feature,detection,and diagnosis：A review

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Chinese Journal of Aeronautics 2018年第5期31卷 867-882页

作者： Wei HONG wenjian cai Shaoping WANG Mileta M.TOMOVIC School of Electrical and Electronic Engineering Nanyang Technological University 639798 Singapore School of Automation Science and Electric Engineering Beihang University Beijing 100083 China Science and Technology on Aircraft Control Laboratory Beijing 100083 China Mechanical and Aerospace Engineering Department Old Dominion University VA 23529 USA

Mechanical debris is an important product of friction wear, which is also a crucial approach to know the running status of a machine. Many studies have been conducted on mechanical debris in related fields such as tribology, instrument, and diagnosis. This paper presents a comprehensive review of these studies, which summarizes wear mechanisms（e.g., abrasive wear, fatigue wear, and adhesive wear） and debris features（e.g., concentration（number）, size, morphology, and composition）, analyzes detection methods principles（e.g., offline： spectrograph and ferrograph, and online： optical method, inductive method, resistive-capacitive method, and acoustic method）,reviews developments of online inductive methods, and investigates the progress of debris-based diagnosis. Finally, several notable problems are discussed for further studies.

关键词： Debris detection Debris feature Fault diagnosis Mechanical wear debris Wear mechanism

A new path planning method for bevel-tip flexible needle insertion in 3D space with multiple targets and obstacles

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Control Theory and Technology 2022年第4期20卷 525-535页

作者： Zhen Tan Dan Zhang Hua-geng Liang Qing-guo Wang wenjian cai Department of Automation Zhejiang University of TechnologyHangzhou 310023ZhejiangChina Urology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430000HubeiChina Beijing Normal University at Zhuhai and also with the BNU-HKBU United International CollegeZhuhai 519087GuangdongChina Department of Electrical and Electronic Engineering Nanyang Technological UniversitySingapore 639798Singapore

In this paper,a new bevel-tip flexible needle path planning method based on the bee-foraging learning particle swarm optimization(BFL-PSO)algorithm and the needle retraction strategy in 3D space is proposed to improve the puncture accuracy and shorten the puncture distance in the case of multiple puncture ***,the movement of the needle after penetrating the human body is analyzed,and the objective function which includes puncture path error,puncture path length,and collision function is ***,the BFL-PSO algorithm and the needle retraction strategy are ***,medical images of the tissue to be punctured are obtained by medical imaging instruments,i.e.,magnetic resonance(MR),and the 3D model of the punctured environment is constructed by 3D Slicer to obtain the environment information on targets and obstacles,and the path of flexible needle is carried out based on the BFL-PSO optimization algorithm and the needle retraction *** simulation results show that,compared with other path planning methods in the related literature,the new path planning method proposed in this paper has higher path planning accuracy,shorter puncture distance,and good adaptability to multi-target path planning problems.

关键词： Path planning Multi-objective optimization Bee-foraging learning Particle swarm

Numerical simulations of high pressure carbon dioxide fluid fluidized beds

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Particuology 2023年第7期78卷 1-15页

作者： Wenjan cai Xietian Xia Xiang Li Xing Chen Zenghui Xu Huilin Lu School of Energy Science and Engineering Harbin Institute of TechnologyHarbin150001China China Construction Eco-Environmental Protection Technology Co. Ltd.Suzhou215100China

Hydrodynamics of carbon dioxide fluid-particle mixtures are predicted using a low density ratio-based kinetic theory of granular flow in high pressure carbon dioxide fluid fluidized beds.A coexistence of particle waves and particle aggregates exists along bed *** threshold to identify the occurrence of particle aggregates is suggested based on standard deviation of solid volume fractions in aggregative *** existence time fractions and frequencies of particle aggregates are predicted along axial *** effect of carbon dioxide fluid temperature and pressure on volume fraction and velocity distributions are analyzed at different inlet carbon dioxide velocities and particle densities in high pressure carbon dioxide fluidized *** results indicate that the carbon dioxide-particles fluidization transits from particulate to aggregative states with the increase of inlet carbon dioxide *** computed fluid volume fractions and heterogeneity indexes are close to the measurements in a high pressure carbon dioxide fluidized bed.

关键词： High pressure carbon dioxide Fluidized bed Transition Aggregative fluidization Particulate fluidization Kinetic theory of granular flow

Universal Encapsulation Adhesive for Lead Sedimentation and Attachable Perovskite Solar Cells with Enhanced Performance

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Energy & Environmental Materials 2024年第03期7卷 307-314页

作者： Xuehao Zhu Haoyu cai Cong Bai Zhengzhe Wu wenjian Shen Yiming Xiong Juan Zhao Fuzhi Huang Yibing Cheng Jie Zhong Research Centre for Advanced Thin Film Photovoltaics State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of Technology Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory School of Automobile Engineering Wuhan University of Technology

In this work,a modified polyurethane adhesive (PUA) was prepared to realize a convenient encapsulation strategy for lead sedimentation and attachable perovskite solar cells (A-PSCs).The modified PUA can completely self-heal within 45 min at room temperature with an efficient lead ionblocking rate of 99.3%.The PUA film can be coated on a metal electrode with slight efficiency improvement from 23.96%to 24.15%.The thermal stability at 65℃and the humidity stability at 55%relative humidity (RH)are superior to the devices encapsulated with *** PUA film has strong adhesion to the flexible substrate and the initial efficiency of the flexible perovskite module (17.2%) encapsulated by PUA remains 92.6%within 1825 *** results suggest that PUA encapsulation is universal for rigid and flexible PSCs with enhanced stability and low lead ***,it was found that flexible PSCs can be well attached to various substrates with PUA,providing a facile route for the A-PSCs in various scenarios without additional encapsulation and installation.

关键词： adhesive attachable device flexible module lead leakage polyurethane

In-situ defect passivation assisted three-step printing of efficient and stable formamidine-lead bromide solar cells

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Journal of Energy Chemistry 2024年第9期96卷 396-405页

作者： Hang Yang Tao Zhou Haoyu cai wenjian Shen Hao Chen Yongjun Liu Juan Zhao Yi-Bing Cheng Jie Zhong State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan 528216GuangdongChina School of Automobile Engineering Wuhan University of TechnologyWuhan 430070HubeiChina

Perovskite solar cells(PSCs)emerge as the most promising photovoltaics(PV)for their high performance and potential convenient cost-effective production routes comparing to the sophomore PV *** printed PSCs with simplified device architecture and fabrication procedures could further enhance the competitive strength of PSC *** this work,we present an in-situ defect passivation(ISDP)assisted full-printing of high performance formamidine-lead bromide(FAPbBr_(3))*** three rapid printing steps are involved for electron transporting layer(ETL),perovskite and carbon to form a complete solar cell on the low-cost fluorine-doped tin oxide(FTO)***-chain polymer monomethyl ether polyethylene glycol is particularly utilized as the ISDP passivator,leading to conformal coating on the rough FTO and defect passivation for both ETL and perovskite during printing.A high efficiency of 10.85%(certified 10.14%)and a high V_(oc)up to 1.57 V are achieved for the printed *** unencapsulated PSCs maintain above 90%of the initial efficiency after continuously heating at 85℃for 1000 h and over 80%of the efficiency after the maximum power point tracking for 3500 *** fully printed semitransparent PSCs with carbon grids(CGs)show average visible light transmittance over 33%and an efficiency of 8.81%.

关键词： Formamidinium lead bromide Fully printed Lowcosts Carbon electrode Semitransparent

暖通空调系统优化控制与能量管理的现状及发展趋势

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暖通空调 2007年第4期37卷 30-34,18页

作者：李树江秦军刘畅张晓青 wenjian cai 沈阳工业大学 110023 南洋理工大学新加坡

分析了暖通空调优化能量消耗的特点,介绍了暖通空调控制系统基础控制器参数整定、工作点优化和能量管理的现状。根据暖通空调系统的未来需求和相关技术的发展,提出了其控制技术的发展方向。

关键词：暖通空调优化控制器参数整定能量管理

低浓度CO_2捕集斜向紧凑微型流化床的设计及性能

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东南大学学报（自然科学版） 2016年第4期46卷 770-775页

作者：李晓飞王雷贾磊蔡文剑山东大学控制科学与工程学院济南250061 南洋理工大学电气与电子工程学院新加坡639798

为高效节能地利用固体吸附剂进行低浓度CO_2捕集,提出了一种低压降和高吸附剂利用率的新型斜向紧凑微型流化床(OCMFB)反应器.通过CO_2捕集实验,对OCMFB反应器与径向流固定床(RFFB)反应器、径向吸附器(RA)和流化床(FB)反应器的性能进行... 详细信息

为高效节能地利用固体吸附剂进行低浓度CO_2捕集,提出了一种低压降和高吸附剂利用率的新型斜向紧凑微型流化床(OCMFB)反应器.通过CO_2捕集实验,对OCMFB反应器与径向流固定床(RFFB)反应器、径向吸附器(RA)和流化床(FB)反应器的性能进行了对比研究.实验结果表明:与RFFB,RA和FB反应器相比,OCMFB反应器床道流化性和低进气速度的优势使压降最大降幅分别达到60%,56%和63%,CO_2穿透吸附时间分别增加了42%,35%和8%,饱和时间分别缩短24%,20%和15%;经过10次CO_2捕集循环后,OCMFB反应器与RFFB和RA反应器相比,吸附剂磨损基本相当,与FB反应器相比,吸附剂磨损明显减小;OCMFB反应器表现出比RFFB,RA和FB反应器更稳定的CO_2吸附性能.

关键词： CO2捕集固态胺吸附剂径向流固定床流化床

Research on China’s technology lists for addressing climate change

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Chinese Journal of Population,Resources and Environment 2021年第2期19卷 151-161页

作者： Can Wang Jianhui Cong Ke Wang Yue Qi wenjian cai Yulong Li Sha Fu Wentao Wang Yuanyuan Wei Xinzhu Zheng Jiani Jiang Mingpeng Chen Wenling Liu Yongxiang Zhang Zhibing Tian Ji Chen Rui Li Haiqing Zuo School of Environment Tsinghua UniversityBeijing100084China School of Economics and Management Shanxi UniversityTaiyuan030006China School of Environment and Natural Resources Renmin University of ChinaBeijing100872China National Center for Climate Change Strategy and International Cooperation Beijing100038China Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System ScienceTsinghua UniversityBeijing100084China School of Management Science and Engineering Central University of Finance and EconomicsBeijing100081China AdministrativeCenter for China’s Agenda 21 Beijing100038China Beijing Technology Innovation Service Center Beijing 101101China School of Economics and Management China University of PetroleumBeijing 102249China Law School Minzu University of ChinaBeijing 100081China School of Agriculture and Rural Development Renmin University of ChinaBeijing100872China School of Management and Economics Beijing Institute of TechnologyBeijing100081China National Climate Center China Meteorological AdministrationBeijing 100081China China Energy Saving Consulting Co. LtdBeijing100142China Rocky Mountain Institute Beijing100020China School of Foreign studies Guangxi University of Science and TechnologyLiuzhou545006China

The compilation of technology lists addressing climate change has a guiding effect on promoting technological research and development,demonstration,and *** is also crucial for China to strengthen ecological civilization construction,achieve the carbon emission peak and carbon neutrality target,and enhance global climate governance *** study first proposes the existing classification outline of the technology promotion lists,technology demand lists,and future technology ***,different methodologies are integrated on the basis of the existing outline of four technology lists:China’s existing technological promotion list for addressing climate change,China’s demand list for climate change mitigation technology,China’s key technology list for addressing climate change,and China’s future technology list for addressing climate ***’s more,core technologies are analyzed in the aspects of technology maturity,carbon reduction cost,carbon reduction potential,economic benefits,social influence,uncertainty,*** results show that:key industries and sectors in China already have relatively mature mitigation/adaptation technologies to support the achievement of climate change *** multi-sectoral system of promoting climate friendly technologies has been established,which has played an active role in tackling climate ***,climate technology needs are concentrated in the traditional technology and equipment upgrading,renewable energy technology,and management decision-making support *** key technologies are concentrated in 3 major areas and 12 technological directions that urgently need a *** carbon emmission peak and nentrality,carbon depth reduction and zero carbon emissions and geoengineering technology(CDR and SRM)have played an important role in forming the structure of global emissions and achieving carbon neutrality in the ***,the uncertainty assessment for the comprehensive techno

关键词： Technology for addressing climate change Technology list Carbon emission peak Carbon neutrality Key technology

Predictive value of T cell receptor repertoire profiling for immunosuppressive therapy in severe aplastic anemia

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Genes & Diseases 2024年第1期11卷 95-98页

作者： Cunte Chen Yuling Zhang Dongpei Lu Zelong Zhang Jun Yang Xiaowei Chen Ming Zhou wenjian Mo caixia Wang Qinghua cai Yumiao Li Ruiqing Zhou Shilin Xu Wei Zhou Tingfen Deng Shiyi Pan Yanli Xu Shunqing Wang Yuping Zhang Department of Hematology Guangzhou First People's HospitalSouth China University of TechnologyGuangzhouGuangdong 510180China Guangzhou Junruikang Biotechnology Co. LtdGuangzhouGuangdong 510700China

Increasing evidence supports the hypothesis of autologous immune attack in severe aplastic anemia(SAA):the predominant role of activated cytotoxic T cells(CTL)expressing-interferon in inhibiting the growth of bone marrow(BM)cells,putative autoantigens,and oligoclonal expansion of CD8+T cells.1 For SAA patients,the definitive therapies are immunosuppressive therapy(IST)or hematopoietic stem transplantation(HSCT).

关键词： anemia aplastic interferon