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Development of High-Speed On-Of Valves and Their Applications

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Chinese Journal of Mechanical Engineering 2022年第4期35卷 21-41页

作者： He wang zhen Chen Jiahai Huang long Quan Bin Zhao Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024China

With the widespread application of the computer and microelectronic technology in the industry,digitization becomes the inevitable developing trend of the hydraulic *** of the hydraulic components is critical in the digital hydraulic ***-speed on-of valves(HSVs)which convert a train of input pulses into the fast and accurate switching between the on and of states belong to widely used basic digital hydraulic *** some ways,the characteristics of the HSVs determine the performance of the digital hydraulic *** paper discusses the development of HSVs and their ***,the HSVs with innovative structures which is classifed into direct drive valves and pilot operated valves are discussed,with the emphasis on their ***,an overview of HSVs with intelligent materials is presented with considering of the switching frequency and fow ***,the applications of the HSVs are reviewed,including digital hydraulic components with the integration of the HSVs and digital hydraulic systems controlled by the HSVs.

关键词： High-speed on-of valve Digital hydraulic component Switching frequency Flow rate Innovative structure Intelligent material

Efficient photoelectrodes based on two-dimensional transition metal dichalcogenides heterostructures:from design to construction

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Rare Metals 2022年第4期41卷 1142-1159页

作者： xiang-Chao Lu Yi-zhen Lu Cong wang Yang Cao State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials(iChEM)College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Pen-Tung Sah Institute of Micro-Nano Science and Technology Xiamen UniversityXiamen 361005China

Hydrogen production by photoelectrochemical(PEC) water splitting converts the inexhaustible supply of solar radiation to storable H2 as clean energy and thus has received widespread *** efficiency of PEC water splitting is largely determined by the properties of the ***-dimensional(2 D) layered transition metal dichalcogenides(TMDs) are promising candidates for photoelectrodes due to their atomic layer thickness,tunable bandgap,large specific surface area,and high carrier ***,the construction of 2 D TMDs heterostructures provides freedom in material design,which facilitates the further improvement of PEC water *** review begins by describing the mechanism of PEC water splitting and the advantages of 2 D TMDbased heterostructures for photo ***,the design considerations of the heterostructures for enhanced PEC efficiency are comprehensively reviewed with a focus on material selection,band engineering,surface modification,and long-term ***,current challenges and future perspectives for the development of photoelectrodes based on 2 D TMDs heterostructures are addressed.

关键词： Two-dimensional transition metal van der Waals heterostructure Photoelectrode Photoelectrochemical cell Water splitting

Comparison of thermal shock resistance capabilities of the rotary swaged pure tungsten,potassium-doped tungsten,and W-La_(2)O_(3)alloys

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Tungsten 2024年第4期6卷 759-766页

作者： Tao Yang Hao wang Fan feng xiang Liu Xue-Yu Gong You-yun Lian Jian-Bao wang School of Nuclear Science and Technology University of South ChinaHengyang421001China Southwestern Institute of Physics Chengdu610041China

Tungsten-based materials are one of the most important candidates for the plasma facing materials(PFMs)of future fusion reactors,and it is necessary to study the properties of tungsten-based materials under the service conditions of fusion devices to ensure the long-term steady-state operation of future fusion *** this paper,different tungsten-based materials made by the same rotary swaging process are selected to simulate the transient thermal loads on the PFMs of a fusion reactor using an electron beam,and thermal load experiments are carried out by changing the power density of a loading pulse and the pulse *** is found that different tungsten-based materials made by the same process have large differences in thermal shock resistance,and the doped tungsten materials(W-K and W-La_(2)O_(3))are significantly better than the pure tungsten materials with the increase in thermal shock power density and the number of cycles,especially the W-K materials,which have excellent performance.

关键词： Rotary swaging Tungsten materials Electron beam Thermal shock

WAVE-CURRENT FORCES ON BIPILES IN TANDEM ARRAY

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Journal of Hydrodynamics 1991年第4期3卷 66-75页

作者： Yu-cheng, Li feng-long, wang Dalian Univ of Technology Dalian China

The in-line and lift forces on bipiles in tandem array induced by both irregular waves and currents were investigated experimentally in this paper. The characteristics in both time and frequency domain of inline, lift and resultant forces as well were analyzed. The grouping effect coefficients of in-line and resultant forces on two piles related to KC number and relative spacing parameters are given. A comparison of the magnitude and direction of resultant forces on bipiles in tandem array with the corresponding values for single cylinder is also made.

关键词： Hydrodynamics Fluid Structure Interaction Mathematical Techniques Frequency Domain Analysis Mathematical Techniques Time Domain Analysis Mechanical Variables Measurement Forces Water Waves Analysis

Strong,Removable,and Photoluminescent Hyperbranched Polyamide-amine Hot Melt Adhesive

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Chinese Journal of Polymer Science 2021年第10期39卷 1319-1327,I0008页

作者： Si-Jia Zhang Xing-Xing Chen Chen-Hui Cui Li Ma Qian-yun Zhong Kai-xiang Shen Jing Yu zhen Li You-Shen Wu Qiang Zhang Yi-long Cheng Ling He Yan-feng Zhang School of Chemistry and Ministry of Education Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter and State Key Lab for Strength and Vibration of Mechanical Structures Xi'an Jiaotong UniversityXi'an 710049China

The development of adhesive technology is gaining increasing attention in machinery,electronics,aviation,and other ***,traditional adhesives are difficult to be peeled and removed after cross-linking and curing due to the limited solubility in common solvents,which causes pollution and damage to the surface of the *** this work,we synthesized random hyperbranched polyamide-amine hot melt adhesives through Michael addition of 1,8-octanediamine and N,N’-methylene diacrylamide(ODA-RHP HMA).Owing to the presence of various polar groups,ODA-RHP HMA exhibited robust lap shear strength to different substrates,including glass(6.6 MPa),ceramics(10.3 MPa),steel(11.5 MPa),and aluminum(11.8 MPa).Due to the hydrogen bonds in ODA-RHP,the HMA demonstrated intrinsic self-healing ability,which can be used repeatedly when being subjected to cyclic heating and *** ODA-RHP HMA can be swollen or dissolved in ethanol,the adhesives can be easily removed through *** addition,ODA-RHP exhibited aggregation-induced luminescence due to the tertiary amine structure in the molecular structure of ODA-RHP,which can be used in the field of cultural relics restoration.

关键词： Hot melt adhesive Polyamide-amine Reusability Cultural relics restoration

Precipitation Behavior and Microstructural Evolution of Ferritic Ti–V–Mo Complex Microalloyed Steel

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Acta Metallurgica Sinica(English Letters) 2018年第9期31卷 997-1005页

作者： Ke Zhang Hui wang Xin-Jun Sun feng-Li Sui Zhao-Dong Li En-xiang Pu zheng-Hai Zhu zhen-Yi Huang Hong-Bo Pan Qi-long Yong Key Laboratory of Metallurgical Emission Reduction and Resources Recycling Anhui University of TechnologyMinistry of EducationMaanshan 243032China School of Metallurgical Engineering Anhui University of TechnologyMaanshan 243032China Central Iron and Steel Research Institute Beijing 100081China

Precipitation behavior of （Ti, V, Mo）C and microstructural evolution of the ferritic Ti-V-Mo complex microalloyed steel were investigated through changing coiling temperature （CT）. It is demonstrated that the strength of the Ti-V-Mo microalloyed steel can be ascribed to the combination of grain refinement hardening and precipitation hardening. The variation of hardness （from 318 to 415 HV, then to 327 HV） with CT （from 500 to 600-625 ℃, then to 700 ℃） was attributed to the changes of volume fraction and particle size of （Ti, V, Mo）C precipitates. The optimum CT was considered as 600-625 ℃, at which the maximum hardness value （415 HV） can be obtained. It was found that the atomic ratios of Ti, V and Mo in （Ti, V, Mo）C carbides were changed as the CT increased. The precipitates with the size of 〈 10 nm were the V-rich particles at higher CT of 600 and 650 ℃, while the Ti-rich particles were observed at lower CT of 500 and 550 ℃. Theoretical calculations indicated that the maximum nucleation rate of （Ti, V, Mo）C in ferrite matrix occurred around 630 ℃, which was consistent with the 625 ℃ obtained from experiment results.

关键词： Nano-sized precipitates Precipitation hardening Ti-V-Mo Coiling temperature Ferrite

Doping-driven dual heterogeneous interfacial structures boosting the durability of industry-compatible water splitting at high current density

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Science China Chemistry 2024年第10期67卷 3468-3481页

作者： Chunming Yang Lihai Zhou Zhijie Kong xiang Li wangchuan Zhu Guangqing wang Yanzhong zhen feng Fu Yucang Liang Research Institute of Comprehensive Energy Industry Technology College of Chemistry&Chemical EngineeringYan’an UniversityYan’an 716000China Henan Key Laboratory of Crystalline Molecular Functional Materials Green Catalysis CenterCollege of ChemistryZhengzhou UniversityZhengzhou 450001China Institut für Anorganische Chemie Eberhard Karls UniversitätTübingen 72076Germany

Developing highly stable electrocatalysts under industry-compatible current densities(>500 mA cm^(-2))in an anion-exchange membrane water electrolyzer(AEMWE)is an enormous challenge for water ***,based on the results of density function theory calculations,a dual heterogeneous interfacial structured NiSe/Fe-Ni(OH)_(2)catalyst was subtly designed and successfully prepared by electrodepositing Fe-doped Ni(OH)_(2)on NiSe-loaded nickel foam(NF).Fe doping-driven heterogeneous structures in NiSe/Fe-Ni(OH)_(2)markedly boost catalytic activity and durability at industrially compatible current densities in single hydrogen and oxygen evolution reactions under alkaline *** particular,NiSe/Fe-Ni(OH)_(2)shows a negligible performance loss at 600 mA cm^(-2)at least 1,000 h for overall water splitting,a distinguished long-term durability acting as AEMWE electrodes at 600 mA cm^(-2)and 1 A cm^(-2)at 85℃for at least 95 *** to Fe doping-induced strong synergetic effect between Ni and Fe,dual heterostructure-promoted charge transfer and redistribution,abundant catalytic active sites,and improvement of stability and durability,a mechanism of Fe doping-driven heterogeneous interfacial structurepromoted catalytic performance was *** study provides a successful example of theory-directed catalyst preparation and pioneers a creative strategy for industry-compatible water splitting at high current density.

关键词： doping-induced heterojunction structure NiSe/Fe-Ni(OH)_(2) large current density anion-exchange membrane industrycompatible water electrolysis

Pleural effusion and ascites in extrarenal lymphangiectasia causedby post-biopsy hematoma: A case report

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World Journal of Clinical Cases 2020年第24期8卷 6330-6336页

作者： Qiong-zhen Lin Hui-En wang Dong Wei yun-feng Bao Hang Li Tao wang Department of Nephrology The Third Hospital of Hebei Medical UniversityShijiazhuang 050051Hebei ProvinceChina Department of Thoracic Surgery Hebei Provincial General HospitalShijiazhuang 050051Hebei ProvinceChina Department of Urology Hebei Provincial General HospitalShijiazhuang 050051Hebei ProvinceChina Department of Medical Imaging Hebei General HospitalShijiazhuang 050051Hebei ProvinceChina Department of Nephrology Peking Union Medical College HospitalBeijing 100045China Department of Nephrology The First Hospital of Hebei Medical UniversityShijiazhuang 050000Hebei ProvinceChina

BACKGROUNDThe renal system has a specific pleural effusion associated with it in the form of“urothorax”, a condition where obstructive uropathy or occlusion of thelymphatic ducts leads to extravasated fluids (urine or lymph) crossing thediaphragm via innate perforations or lymphatic channels. As a rare disorder thatmay cause pleural effusion, renal lymphangiectasia is a congenital or acquiredabnormality of the lymphatic system of the kidneys. As vaguely mentioned in areport from the American Journal of Kidney Diseases, this disorder can be causedby extrinsic compression of the kidney secondary to *** SUMMARYA 54-year-old man with biopsy-proven acute tubulointerstitial nephropathyexperienced bleeding 3 d post hoc, which, upon clinical detection, manifested as amassive perirenal hematoma on computed tomography (CT) scan withoutconcurrent pleural effusion. His situation was eventually stabilized byexpeditious management, including selective renal arterial embolization. Despite good hemodialysis adequacy and stringent volume control, a CT scan 1 mo laterfound further enlargement of the perirenal hematoma with heterogeneoushypodense fluid, left side pleural effusion and a small amount of ascites. Thesefluid collections showed a CT density of 3 Hounsfield units, and drained fluid ofthe pleural effusion revealed a dubiously light-colored transudate withlymphocytic predominance (> 80%). Similar results were found 3 mo later, duringwhich time the patient was free of pulmonary infection, cardiac dysfunction andovert hypoalbuminemia. After careful consideration and exclusion of otherpossible causative etiologies, we believed that the pleural effusion was due to theocclusion of renal lymphatic ducts by the compression of kidney parenchymaand, in the absence of typical dilation of the related ducts, considered our case asextrarenal lymphangiectasia in a broad *** such, our case highlighted a morbific passage between the kidney and thoraxunder an extrao

关键词： Urothorax Pleural effusion Perirenal hematoma Renal lymphangiectasia Lymphatic drainage Case report

Advancements and challenges in bionic joint lubrication biomaterials for sports medicine

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Biosurface and Biotribology 2024年第3期10卷 89-105页

作者： Lei xiang zhen wang Wenguo Cui Department of Orthopaedics Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint DiseasesShanghai Institute of Traumatology and OrthopaedicsRuijin HospitalShanghai Jiao Tong University School of MedicineShanghaiChina

Bionic lubricant materials are a class of materials inspired by natural organisms and offer excellent lubrication properties and *** the field of sports medicine,their application opens up new possibilities for the prevention and treatment of sports-related *** authors will introduce the existing theoretical models of friction in the locomotor system,the characteristics and advantages of biomimetic lubrication materials and discuss in depth their applications in the field of sports *** development of bionic lubrication materials opens up unprecedented opportunities for sports medicine to provide more effective and long-lasting treatment options for patients.

关键词： biointerface bio-lubricant biomaterials biomedical application medicine