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碳纤维增强复合材料包裹强化形式对钢管横向冲击性能的影响

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吉林大学学报（工学版） 2022年第4期52卷 819-828页

作者：庄蔚敏陈沈吴迪吉林大学汽车仿真与控制国家重点实验室长春130022

针对碳纤维增强复合材料(CFRP)非全包裹可以在提高钢管性能的前提下实现进一步的轻量化,对CFRP强化钢管进行了横向冲击仿真研究,获得了CFRP包裹钢管的强化形式和尺寸对钢管横向冲击性能的影响规律。基于Hashin复合材料失效准则和Ductil... 详细信息

针对碳纤维增强复合材料(CFRP)非全包裹可以在提高钢管性能的前提下实现进一步的轻量化,对CFRP强化钢管进行了横向冲击仿真研究,获得了CFRP包裹钢管的强化形式和尺寸对钢管横向冲击性能的影响规律。基于Hashin复合材料失效准则和Ductile金属失效准则,建立了CFRP全包裹钢管的落锤横向冲击仿真模型并验证模型的有效性。研究CFRP在钢管表面轴向粘贴、冲击侧环向粘贴和冲击侧背面环向粘贴时,CFRP粘贴尺寸与CFRP强化钢管抗冲击性能的关系。进行落锤横向冲击仿真,研究冲击作用下钢管损伤的分布规律,对比不同粘贴长度下强化钢管的最大位移和CFRP的吸能量。结果表明,增大CFRP轴向粘贴尺寸对钢管的强化作用更为明显;当环向全部粘贴、轴向粘贴长度为50%钢管跨距和轴向全部粘贴、环向粘贴长度为87.5%圆管外部周长时,CFRP强化钢管抗冲击性能与CFRP全包裹钢管基本一致。

关键词：车辆工程碳纤维增强复合材料强化钢管抗冲击

Surface water exchanges in the Luzon Strait as inferred from Lagrangian coherent structures

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Acta Oceanologica Sinica 2020年第11期39卷 21-32页

作者： Zhehao Zheng wei zhuang Jianyu Hu Zelun Wu Changjian Liu State Key Laboratory of Marine Environmental Science College of Ocean and Earth SciencesXiamen UniversityXiamen 361102China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China Joint Center for Ocean Remote Sensing University of Delaware-Xiamen UniversityNewarkDE 19716USA South China Sea Marine Survey and Technology Center Ministry of Natural ResourcesGuangzhou 510300China

This study presents a Lagrangian view of upper water exchanges across the Luzon Strait based on the finite-time Lyapunov exponents(FTLE)fields computed from the surface geostrophic *** Lagrangian coherent structures(LCSs)extracted from the FTLE fields well identify the typical flow patterns and eddy activities around the Luzon *** addition,they reveal the intricate transport paths and fluid domains,which are validated by the tracks of satellite-tracked surface drifters and cannot be visually recognized in the velocity *** FTLE fields indicate that there are mainly four types of transport patterns near the Luzon Strait;among them,the Kuroshio northward-flowing"leaping"pattern and the clockwise rotating"looping"pattern occur more frequently than the"leaking"pattern of the direct Kuroshio branch into the SCS and the"outflowing"pattern from the SCS to the *** eddy shedding events of the Kuroshio at the Luzon Strait are further analyzed,and the importance of considering LCSs in estimating transport by eddies is *** anticyclonic eddy(ACE)shedding cases reveal that ACEs mainly originate from the looping paths of Kuroshio and thus could effectively trap the Kuroshio water before eddy *** provide useful information to predict the positions of the upstream waters that finally enter the *** contrast,LCS snapshots indicate that during the formation of cyclonic eddies(CEs),most CEs are not connected with the pathways of Kuroshio ***,the contribution of CEs to the surface water exchanges from the Pacific into the SCS is tiny.

关键词： Lagrangian coherent structures(LCSs) Kuroshio Luzon Strait transport pathways particle tracking

Recent advance of chemoenzymatic catalysis for the synthesis of chemicals: Scope and challenge

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Chinese Journal of Chemical Engineering 2021年第2期34卷 146-167页

作者： Mengjiao Xu Zhuotao Tan Chenjie Zhu wei zhuang Hanjie Ying Pingkai Ouyang College of Biotechnology and Pharmaceutical Engineering Nanjing Tech UniversityNanjing 211816China

Chemoenzymatic catalysis can give full play to the advantages of versatile reactivity of chemocatalysis and excellent chemo-,regio-,and stereoselectivities of *** chemoenzymatic methods can not only save resource,cost,and operating time but also reduce the number of reaction steps,and avoid separating unstable intermediates,leading to the generation of more products under greener circumstances and thereby playing an indispensable role in the fields of medicine,materials and fine *** incompatible challenges between chemocatalyst and biocatalyst remain,strategies such as biphasic system,artificial metalloenzymes,immobilization or supramolecular host,and protein engineering have been designed to overcome these *** this review,chemoenzymatic catalysis according to different chemocatalysis types was classifiably described,and in particular,the classic dynamic kinetic resolutions(DKR)and cofactor regeneration were ***,the bottlenecks and development of chemoenzymatic catalysis were summarized,and future development was prospected.

关键词： Chemoenzymatic Dynamic kinetic resolution Cofactor regeneration Biocatalysis Chemocatalysis

温度对车身钢铝胶铆连接结构热应力变化的影响

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吉林大学学报（工学版） 2022年第1期52卷 70-78页

作者：庄蔚敏陈沈王楠吉林大学汽车仿真与控制国家重点实验室长春130022

针对车身结构在涂装过程中温度变化对钢铝胶铆连接结构的影响,研究了影响结构热应力的主要因素。在钢、铝、粘接剂的单向拉伸试验和热膨胀试验基础上进行钢铝胶铆连接结构高温热膨胀试验,获得了钢板、铝板表面的应变值。建立了钢铝胶铆... 详细信息

针对车身结构在涂装过程中温度变化对钢铝胶铆连接结构的影响,研究了影响结构热应力的主要因素。在钢、铝、粘接剂的单向拉伸试验和热膨胀试验基础上进行钢铝胶铆连接结构高温热膨胀试验,获得了钢板、铝板表面的应变值。建立了钢铝胶铆连接结构热膨胀有限元仿真模型,通过试验验证了仿真模型的有效性。分析胶铆结构在升温、保温、降温过程中的应力变化情况,获得了钢铝胶铆连接结构在厚度方向上尺寸随温度的变化规律。研究了粘接剂厚度、粘接宽度和金属铆接顺序对钢铝胶铆连接结构在高温作用下的影响。结果表明,钢铝胶铆连接结构在经历高温作用后会产生残余应力和热变形;适当增大粘接剂厚度可以降低胶铆连接结构的残余应力和应力集中,降低结构整体的热变形;增大粘接宽度能有效降低胶铆接头中的残余应力,但会导致钢铝胶铆连接结构塑性变形增大;铝板在上、钢板在下铆接时胶铆接头的残余应力较小。

关键词：车辆工程钢铝胶铆连接材料热膨胀残余热应力热变形

A general and facile calcination method to synthesize single-site catalysts for highly efficient electrochemical CO_(2) reduction

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Nano Research 2024年第5期17卷 3895-3901页

作者： Rui Sui Bingyan Wang Yongsheng Wang Jiajing Pei wei Zhu Wenxing Chen Chunhui Li Ailing Sun Zhongbin zhuang Engineering Research Center of Advanced Rare Earth Materials Department of ChemistryTsinghua UniversityBeijing 100084China College of Chemistry and Green Catalysis Center Zhengzhou UniversityZhengzhou 450001China State Key Lab of Organic-Inorganic Composites and Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Energy&Catalysis Center School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China

The electrochemical CO_(2) reduction reaction(CO_(2)RR)has received widespread attention as a promising method for producing sustainable chemicals and mitigating the global ***,we demonstrate a general and facile synthetic route for the metal-nitrogen-carbon(M-N-C)type catalyst by simply calcinating metal acetate and urea with commercial carbon black,which have potential application in CO_(2)*** synthesized Ni-NC-600 catalyst has the structure of single Ni atom coordinated with one N atom and three C atoms(Ni-N_(1)C_(3)),which is suggested by X-ray absorption *** Ni-NC-600 catalyst exhibits high CO_(2)RR catalytic performance and a high CO Faraday efficiency above 98%in a wide potential range from-0.7 to-1.3 V(*** hydrogen electrode(RHE)),superior to most of the reported Ni-N-C *** work has developed a facile strategy to synthesize high performance CO_(2)RR catalyst.

关键词： nickel single atom catalyst CO_(2)reduction reaction CO production electrocatalyst

临床药师参与中枢神经系统毛霉菌感染治疗的实践及思考

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临床药物治疗杂志 2024年第1期22卷 85-87页

作者：庄伟齐晓涟高冉张婧杨毅恒褚燕琦董宪喆张兰首都医科大学宣武医院药学部北京100053 首都医科大学宣武医院神经内科北京100053 北京大学第三医院药剂科北京100191

中枢神经系统毛霉菌感染是一种病情凶险的颅内感染性疾病,病死率达到50%以上。本文介绍了2例中枢神经系统毛霉菌感染危重病例,并从全身治疗药物的选择、局部治疗用药的选择及两性霉素B的用法用量、治疗疗程与序贯治疗、输注过程中的监... 详细信息

中枢神经系统毛霉菌感染是一种病情凶险的颅内感染性疾病,病死率达到50%以上。本文介绍了2例中枢神经系统毛霉菌感染危重病例,并从全身治疗药物的选择、局部治疗用药的选择及两性霉素B的用法用量、治疗疗程与序贯治疗、输注过程中的监护、发生不良反应后的对策等方面进行总结与分析,以期为临床用药提供参考。

关键词：毛霉菌感染两性霉素B 临床药师

Global evolution of an analyzer angle on the Faraday anomalous dispersion optical filter at 1529 nm

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Chinese Science Bulletin 2013年第36期58卷 4582-4587页

作者： TAO ZhiMing WANG YanFei HONG YeLong WANG DongYing zhuang wei CHEN JingBiao State Key Laboratory of Advanced Optical Communication System and Network Institute of Quantum Electronics School of ElectronicsEngineering and Computer Science Peking University Department of Physics Bijie University

In order to realize laser frequency stabilization,the global evolution of an analyzer angle on the electrodeless-discharge-vaporlamp-based excited-state Faraday anomalous dispersion optical filter(LESFADOF)with a single transmission peak operating on the Rb1529 nm(5P3/2-4D5/2)is *** find that the transmission of the line center peak at 80°arrives at 14%in a 3 cm length lamp contained natural Rb mixed with 2 torr Xe buffer gas operating at 250°C with 176 MHz radio *** it is used to realize laser frequency stabilization,the LESFADOF at near 80°is *** a single transmission peak or double transmission peaks depend on the rf voltage when two polarizers are crossed.

关键词：法拉第反常色散光学滤波器演进激光稳频无电极放电无线电频率频率稳定激发态

Evolution and propagation of a mesoscale eddy in the northern South China Sea during winter

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Acta Oceanologica Sinica 2013年第7期32卷 1-7页

作者： LIU Changjian DU Yan zhuang wei XIA Huayong XIE Qiang State Key Laboratory of Tropical Oceanography South China Sea Institute of OceanologyChinese Academy of Sciences South China Sea Marine Engineering Surveying Center South China Sea BranchState Oceanic Administration

In situ observations, satellite data, and the output from an eddy-resolving ocean circulation model were used to study the generations and propagations of an anticyclonic eddy in the northern South China Sea （NSCS） during the winter of 2009-2010. In the NSCS, the anticyclonic eddy firstly appeared to the west of the Luzon Strait, migrated generally along the continental slope and dissipated around the Xisha Archipela- go. The evolution of the warm eddy contains three phases： development, maturation, and decay. The eddy mainly stayed near 119.7°E in December and then gradually moved to 118.7°E until January 15, when its intensity, as indicated by the thermocline temperature and salinity anomalies, increased significantly, re- flecting the growth of the eddy. The eddy reached its peak on January 15 and persisted until February 23. During this period, the eddy propagated westward to 116.4°E. After, the warm eddy weakened significantly and dissipated finally near the Xisha Archipelago.

关键词： northern South China Sea anticyclonic eddy propagation

A Research on the Flow Characteristics of a Splitter-Based Water Cooling System for Computer Boards

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Fluid Dynamics & Materials Processing 2021年第4期17卷 833-844页

作者： Yukun Lv Quanzhi Ge zhuang wei Shuang Yang North China Electric Power University Baoding071003China

The splitter is an important component of water-based cooling systems used to extract heat from computer *** the present study,the flow characteristics of a 16-splitter structure were numerically simulated and compared with experimental results to verify the reliability of the numerical simulation ***,the concept of splitter structural coefficients was *** on the results of this study,we recommend a selection range of 5≤k≤6 for the structure factor k of the splitter;after optimization,the maximum deviation of the splitter outlet flow was reduced from the original value of 100%to 8.3%.

关键词： Computing board cold-water splitter structure factor flow-transfer characteristics experimental study numerical simulation