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Chinese Journal of Chemical engineering 2024年第3期67卷 58-67页

作者： Deqing He Zihao xie Qian Yang Wei Wang Chao Su school of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212100China State Key Laboratory of Materials-Oriented Chemical engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China

The sluggish redox kinetics of polysulfides in lithium-sulfur(Li-S)batteries are a significant obstacle to their widespread adoption as energy storage ***,recent studies have shown that tungsten oxide(WO_(3))can facilitate the conversion kinetics of polysulfides in Li-S ***,we fabricated host materials for sulfur using nitrogen-doped carbon nanotubes(N-CNTs)and WO_(3).We used low-cost components and simple procedures to overcome the poor electrical conductivity that is a disadvantage of metal *** composites of WO_(3) and N-CNTs(WO_(3)/N-CNTs)create a stable framework structure,fast ion diffusion channels,and a 3D electron transport network during electrochemical reaction *** a result,the WO_(3)/N-CNT-Li2S6 cathode demonstrates high initial capacity(1162 mA·h·g^(-1) at 0.5℃),excellent rate performance(618 mA·h·g^(-1) at 5.5℃),and a low capacity decay rate(0.093%up to 600 cycles at 2℃).This work presents a novel approach for preparing tungsten oxide/carbon composite catalysts that facilitate the redox kinetics of polysulfide conversion.

关键词： Li-S batteries Composites Ion diffusion channels 3D electron transport network Redox kinetics

Microstructure and mechanical properties of Ti/Al/Ti clad plates prepared via powder-in-tube method

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Journal of Iron and Steel Research International 2024年第3期31卷 670-687页

作者： Xian-lei Hu Qin-cheng xie Yi Yuan Ying Zhi State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819LiaoningChina Suzhou Dongbao Haixing Metal Material technology Co. Ltd.Suzhou 215600JiangsuChina school of Material Science and engineering Northeastern UniversityShenyang 110819LiaoningChina

The Ti/Al/Ti clad plates exhibit a broad spectrum of potential ***,the conventional techniques of hot-pressing composite and explosive composite are intricate and environmentally hazardous.A novel method was introduced for preparing clad plates,namely,the powder-in-tube *** method involves a combination of cold rolling,annealing at a temperature of 550℃,and double *** morphology of the intermetallic compound layer was analyzed through the utilization of interface stripping test,tensile test,and microscopic *** interface morphology,interface bonding properties,tensile fracture structures,and properties of plates under the first and second rolling were compared,along with the effects of intermetallic compounds on the interface *** results indicate that the powder-in-tube method,when annealed at 550℃,can produce a composite plate featuring a complete and uniform Ti/Al *** obtained plate exhibits a peeling strength of 21.5 N/mm,tensile strength of 424 MPa,and elongation of 11.5%.Furthermore,a systematic analysis was conducted to determine the causes of performance degra-dation observed during annealing at temperatures of 600 and 650℃.

关键词： Powder-in-tube method-Ti/Al/Ti clad plate Annealing Cold rolling-mechanical property

Effects of fracture evolution and non-Darcy flow on the thermal performance of enhanced geothermal system in 3D complex fractured rock

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International Journal of mining Science and technology 2024年第4期34卷 443-459页

作者： Yachen xie Jianxing Liao Pengfei Zhao Kaiwen Xia Cunbao Li Department of Civil and Mineral engineering University of TorontoToronto M5S1A4Canada College of Water Resources and Hydropower Sichuan UniversityChengdu 610225China State Key Laboratory of Geomechanics and Geotechnical engineering Institute of Rock and Soil MechanicsWuhan 430071China College of Civil engineering Guizhou UniversityGuiyang 550025China Institute of Geosafety School of Engineering and TechnologyChina University of GeosciencesBeijing 100083China State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground engineering Shenzhen UniversityShenzhen 518060China

In fractured geothermal reservoirs,the fracture networks and internal fluid flow behaviors can significantly impact the thermal *** this study,we proposed a non-Darcy rough discrete fracture network(NR-DFN)model that can simultaneously consider the fracture evolution and non-Darcy flow dynamics in studying the thermo-hydro-mechanical(THM)coupling processes for heat extraction in geothermal *** further employed the model on the Habanero enhanced geothermal systems(EGS)project located in ***,our findings illustrate a clear spatial-temporal variation in the thermal stress and pressure perturbations,as well as uneven spatial distribution of shear failure in 3D fracture *** shear failure is mainly concentrated in the first fracture ***,channeling flow have also been observed in DFNs during heat extraction and are further intensified by the expansion of fractures driven by thermal ***,the combined effect of non-Darcy flow and fracture evolution triggers a rapid decline in the resulting heat rate and *** NR-DFN model framework and the Habanero EGS's results illustrate the importance of both fracture evolution and non-Darcy flow on the efficiency of EGS production and have the potential to promote the development of more sustainable and efficient EGS operations for stakeholders.

关键词： Coupled THM model Non-Darcy flow Deformable DFN Enhanced geothermal systems

Design of low-alloying and high-performance solid solution-strengthened copper alloys with element substitution for sustainable development

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International Journal of Minerals,Metallurgy and Materials 2024年第5期31卷 826-832页

作者： Jiaqiang Li Hongtao Zhang Jingtai Sun Huadong Fu Jianxin xie Beijing Advanced Innovation Center for Materials Genome engineering University of Science and Technology BeijingBeijing 100083China Key Laboratory for Advanced Materials Processing(MOE) University of Science and Technology BeijingBeijing 100083China Beijing Laboratory of Metallic Materials and Processing for Modern Transportation University of Science and Technology BeijingBeijing 100083China Liaoning Academy of Materials Shenyang 110004China

Solid solution-strengthened copper alloys have the advantages of a simple composition and manufacturing process,high mechanical and electrical comprehensive performances,and low cost;thus,they are widely used in high-speed rail contact wires,electronic component connectors,and other *** the contradiction between low alloying and high performance is an important challenge in the development of solid solution-strengthened copper *** the typical solid solution-strengthened alloy Cu-4Zn-1Sn as the research object,we proposed using the element In to replace Zn and Sn to achieve low alloying in this *** new alloys,Cu-1.5Zn-1Sn-0.4In and Cu-1.5Zn-0.9Sn-0.6In,were designed and *** total weight percentage content of alloying elements decreased by 43%and 41%,respectively,while the product of ultimate tensile strength(UTS)and electrical conductivity(EC)of the annealed state increased by 14%and 15%.After cold rolling with a 90%reduction,the UTS of the two new alloys reached 576 and 627MPa,respectively,the EC was 44.9%IACS and 42.0%IACS,and the product of UTS and EC(UTS×EC)was 97%and 99%higher than that of the annealed state *** dislocations proliferated greatly in cold-rolled alloys,and the strengthening effects of dislocations reached 332 and 356 MPa,respectively,which is the main reason for the considerable improvement in mechanical properties.

关键词： element substitution copper alloy solid solution strengthening microstructure and performance

Multi-materials drop-on-demand inkjet technology based on pneumatic diaphragm actuator

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Science china(Technological Sciences) 2010年第6期53卷 1605-1611页

作者： xie Dan1,2,ZHANG HongHai1,2,SHU XiaYun1,2,Xiao JunFeng1,2 & CAO Shu1,2 1Institute of Micro-Systems,school of mechanical Science and engineering,Huazhong university of Science and technology,Wuhan 430074,china 2Wuhan National Laboratory for Optoelectronics,Wuhan 430074,china 1. Institute of Micro-Systems School of Mechanical Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China2. Wuhan National Laboratory for Optoelectronics Wuhan 430074 China

Micro-droplet jetting belongs to the field of precision fluid dispensing *** traditional subtraction manufacture process,micro-droplet jetting as an additive fabrication technique with features of non-contact and data-driven represents a new development trend of modern manufacturing *** this paper,the design,fabrication and performance of a multi-materials drop-on-demand (DOD) inkjet system based on pneumatic diaphragm actuator were *** capturing the droplet ejection process and measuring the droplet dimension,a self-made in situ imaging system based on time delayed external trigger was set *** performance of the generator was studied by adjusting the structure and control ***,the influence of fluid properties on the droplet ejection process was experimentally ***-solderballs of 160.5 μm in diameter and UV curing adhesive micro-bumps of 346.94 μm in contact diameter with the substrate were *** results demonstrated that the DOD inkjet generator possesses characteristics of robust,easy to operate and maintain,and able to withstand high temperature as well as applicability to a wide variety of materials including polymers,low melting point resin and high melting point *** system has a great potential of being used in the fields of IC and MEMS packaging,3D printing,organic semiconductor fabrication,and biological and chemical analysis.

关键词： micro-droplet jetting drop on demand pneumatic diaphragm actuator multi-materials

柱面气膜密封槽底导流织构性能提升及作用规律研究

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西安理工大学学报 2024年第1期40卷 36-44页

作者：王衍谢方伟谢雪非王英尧中国矿业大学机电工程学院江苏徐州221116 江苏省海洋资源开发研究院江苏连云港222005 江苏海洋大学机械工程学院江苏连云港222005

研究如何提升柱面气膜密封的稳定性对保证该类密封在高速、高压工况下的安全运行至关重要,鉴于导流织构能够有效提升系统稳定性,本文通过在柱面气膜密封槽底设置一定数量和造型的导流织构,系统研究了不同工况下导流织构对柱面气膜密封... 详细信息

研究如何提升柱面气膜密封的稳定性对保证该类密封在高速、高压工况下的安全运行至关重要,鉴于导流织构能够有效提升系统稳定性,本文通过在柱面气膜密封槽底设置一定数量和造型的导流织构,系统研究了不同工况下导流织构对柱面气膜密封性能的作用规律。结果表明:导流织构对柱面气膜密封微尺度流场具有良好的导流作用,最高压力及高压区面积都显著增大;一定工况和泄漏条件下,导流织构可以显著提升密封开启力;有导流织构的柱面气膜密封还可以显著降低高速、高压工况下微尺度流场中的压力波动方差,且转速越高,抑扰效果越显著。

关键词：柱面气膜密封导流织构密封性能性能提升作用规律

Numerical Simulation Study on the Surface Deflection of Cylindrical Shallow Shell

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武汉理工大学学报 2006年第S2期28卷 577-581页

作者： XING Zhongwen~1 BAO Jun~1 LIU Zhongyuan~1 YANG Yuying~2 SUN Zhenzhong~2 1.school of mechanical and electrical engineering,Harbin Institute of technology,Harbin 150001,china 2.school of Materials Science and engineering,Harbin Institute of technology,Harbin 150001,china school of mechanical and electrical engineering Harbin Institute of TechnologyHarbin 150001China school of Materials Science and engineering Harbin Institute of TechnologyHarbin 150001China

The increasing applications of new materials such as high strength low alloy (HSAL) steels and aluminum alloy sheets have lead to greater focus on the surface deflections of auto body panels in the automobile industry in recent *** finite element models of cylindrical shallow shell that can represent auto body panels are *** simulations of forming and unloading of cylindrical shallow shell are carried *** a measurement and evaluation method of the surface deflection is *** simulations of surface deflections with various blank homing forces (BHF) show great agreement with the experi- mental *** influence laws of sheet thickness and material properties such as yield strengthσs,strain-hardening exponent n,anisotropy parameter r and strength coefficient k on the surface deflection are achieved by simulations,which give a basic refer- ence for controlling surface deflections.

关键词： cylindrical shallow shell surface deflection numerical simulation material properties

Output-feedback Control of a Class of High-Order Nonlinear Systems

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Output-feedback Control of a Class of High-Order Nonlinear S...

Multi-Stage Multidisciplinary Design Optimization Method for Enhancing Complete Artillery Internal Ballistic Firing Performance

2010 Chinese Control and Decision Conference

作者： Na Duan,Xue-Jun xie school of electrical engineering & Automation,xuzhou Normal university,xuzhou,Jiangsu Province,221116,china

＜正＞This paper considers a concrete example,and designs an improved output-feedback controller from the viewpoint of reducing the control effort at premise of maintaining the desired control performance（e.g.,asymptotical stability）.By introducing a new rescaling transformation,adopting an effective reduced-order observer,and choosing ingenious Lyapunov function and appropriate design parameters,the output-feedback controller guarantees the globally asymptotical stability of the closed-loop ***,from both the theoretical analysis and a concrete example,the smaller critical values for gain parameter and rescaling transformation parameter are obtained to reduce effectively the control effort and the rate of change of controller than the design of the related *** last,simulations are given to compare the control effort of two control schemes.

关键词： High-order nonlinear systems Control effort reduction Rescaling transformation Output-feedback control

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Computer Modeling in engineering & Sciences 2024年第7期140卷 793-819页

作者： Jipeng xie Guolai Yang Liqun Wang Lei Li school of mechanical engineering Nanjing University of Science and TechnologyNanjing210094China school of Intelligent Manufacturing Nanjing University of Science and Technology Zijin CollegeNanjing210023China

To enhance the comprehensive performance of artillery internal ballistics—encompassing power,accuracy,and service life—this study proposed a multi-stage multidisciplinary design optimization(MS-MDO)***,the comprehensive artillery internal ballistic dynamics(AIBD)model,based on propellant combustion,rotation band engraving,projectile axial motion,and rifling wear models,was established and *** model was systematically decomposed into subsystems from a system engineering *** study then detailed the MS-MDO methodology,which included Stage I(MDO stage)employing an improved collaborative optimization method for consistent design variables,and Stage II(Performance Optimization)focusing on the independent optimization of local design variables and performance *** methodology was applied to the AIBD *** demonstrated that the MS-MDO method in Stage I effectively reduced iteration and evaluation counts,thereby accelerating system-level ***,Stage II optimization markedly enhanced overall *** comprehensive evaluation results affirmed the effectiveness of the MS-MDO method.

关键词： Artillery internal ballistics dynamics multi-stage optimization multi-disciplinary design optimization collaborative optimization

光线跟踪法在某太阳能集热元件光线分析中的应用

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水电能源科学 2010年第10期28卷 161-164页

作者：王磊陈宁徐宁柳源中国矿业大学电力工程学院江苏徐州221116

基于复合抛物面型集热器(CPC)的光学特性,介绍了一种新型的选择性太阳光隧道,采用光线跟踪法分析并计算其冬夏两种工况下的光学特性。结果表明,选择性太阳光隧道利用冬夏两季太阳高度角的差异可实现不同的吸热效果,为设计改进太阳能集... 详细信息

基于复合抛物面型集热器(CPC)的光学特性,介绍了一种新型的选择性太阳光隧道,采用光线跟踪法分析并计算其冬夏两种工况下的光学特性。结果表明,选择性太阳光隧道利用冬夏两季太阳高度角的差异可实现不同的吸热效果,为设计改进太阳能集热器提供了理论依据。

关键词：光线跟踪法太阳能集热器集热元件分析 Heat Collector Solar Energy Analysis Light Tracing Method Ray 光学特性选择性太阳光复合抛物面型太阳高度角隧道设计改进理论依据热效果结果