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Ultrafine Grain Tungsten Heavy Alloys with Excellent Performance Prepared by Spark Plasma Sintering

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Journal of Wuhan University of Technology(Materials Science) 2020年第2期35卷 393-398页

作者： zhang jingang WANG Weimin JI Wei HE Qianglong WANG Aiyang TAN Lin YANG Kai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Institute of Material Science and EngineeringWuhan University of TechnologyWuhan 430070China

Ultrafine grain tungsten heavy alloys (WHAs) were successfully produced from the nano-crystalline powders using spark plasma *** present study mainly discussed the effects of sintering temperature on the density,microstructure and mechanical properties of the *** relative density of 98.12% was obtained at 1 050 ℃,and the tungsten grain size is about 871 *** 1 000 ℃-1 200 ℃,the mechanical properties of the alloys tend to first rise and then goes *** SPS,the alloy exhibits improved hardness (84.3 HRA at 1 050 ℃) and bending strength (987.16 MPa at 1 100 ℃),due to the ultrafine-grained *** fracture mode after bending tests is mainly characterized as intergranular or intragranular fracture of W grains,interfacial debonding of W grains-binding phase and ductile tearing of binding *** EDS analysis reveals a certain proportion of solid solution between W and Ni-Fe binding *** good mechanical properties of the alloys can be attributed to grain refinement and solid solution strengthening.

关键词： tungsten heavy alloys ultrafine grain nano-crystalline powders solid solution strengthening spark plasma sintering

The Expression and Characterization of a Bifunctional Protein in *** for Autologous Erythrocyte Agglutination Test

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Cellular & Molecular Immunology 2008年第4期5卷 299-306页

作者： Changli Shao jingang zhang Institute of Transfusion Medicine Academy of Military Medical SciencesBeijing 100850 China Biochemistry Department Chinese PLA General Hospital Beijing 100853China

H antigen, the precursor of A and B antigens, belongs to Hh blood system in which it is the only antigen. H antigen distributes on all the human RBC surface except for Bombay phenotype and the copy number of H antigen on the surface of an adult RBC is approximately 1.7 × 10^6. These characteristics made H antigen the potential target molecule for the immunoassay and immunotherapy. A monoclonal antibody 2E8 against H antigen on the surface of erythrocyte had been prepared in previous work. Based on this antibody, the variable region genes of heavy and light chains （Vu and VL） from 2E8 had been cloned by 5＇ RACE. The two variable region genes were spliced by overlap extension and assembled ScFv （Vu-linker-VL） gene encoding the anti-H antigen named ScFv2Es. According to the prediction of the three-dimension structure of ScFv2Es and Cul fragment from 2E8 and HIV-1 gp41 antigen peptide, we further constructed the ScFv2Es-Cul-gp41 fusion molecule. The recombinant ScFv2Es-Cul-gp41 gene was cloned into pET-his vector and expressed in BL21（DE3）plysS cells. The fusion protein was purified from the inclusion bodies. In a series of subsequent analyses, this fusion protein showed identical antigen binding site and activity with the parent antibody. Meanwhile, in mimic test, as the main ingredient of reagent for autologous erythrocyte agglutination test, the bifunctional protein could agglutinate the RBCs in the presence of HIV-1 gp41 antibodies using sera from HIV-infected individuals. Cellular ＆ Molecular Immunology. 2008;5（4）：299-306.

关键词： agglutination bifunctional protein

In situ biosynthesis of bacterial cellulose hydrogel spheroids with tunable dimensions

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Journal of Bioresources and Bioproducts 2024年第1期9卷 90-101页

作者： Bianjing Sun Ping Wang jingang zhang Jianbin Lin Lingling Sun Xiaokun Wang Chuntao Chen Dongping Sun Institute of Chemicobiology and Functional Materials School of Chemistry and Chemical EngineeringNanjing University of Science and TechnologyNanjing 210094China Zhonghao Chenguang Chemical Research Institute Co. Ltd.Zigong 643201China

Bacterial cellulose(BC)hydrogel spheroid plays a significant role in diverse fields due to its spatial 3D structure and *** the present work,a series of BC spheroids with controllable size and shape was obtained via an in situ *** factors for fabricating BC spheroid in-cluding inoculum concentration of 1.35×10^(3)CFU/mL,shaking speeds at 100 r/min,and 48-96 h incubation time during the biosynthetic process,were comprehensively *** operable mechanism model for tuning the size of BC spheroids from 0.4 to 5.0 mm was proposed with a fresh feeding medium strategy of dynamic *** resulting BC spheroids exhibit an inter-active 3D network of nanofibers,a crystallinity index of 72.3%,a specific surface area of 91.2 m^(2)/g,and good *** study reinforces the understanding of BC spheroid forma-tion and explores new horizons for the design of BC spheroids-derived functional matrix materials for medical care.

关键词： In situ biosynthesis Bacterial cellulose Hydrogel Spheroid Tunable dimension

A reconfigurable dynamic Bayesian network for digital twin modeling of structures with multiple damage modes

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Theoretical & Applied Mechanics Letters 2023年第4期13卷 251-260页

作者： Yumei Ye Qiang Yang jingang zhang Songhe Meng Jun Wang Xia Tang School of Mechanical Technology Wuxi Institute of TechnologyWuxi 214121China National Key Laboratory of Science and Technology for National Defence on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150001China Beijing Institute of Astronautical Systems Engineering Beijing 100076China

Dynamic Bayesian networks(DBNs)are commonly employed for structural digital twin *** present,most researches only consider single damage mode *** is not sufficient for a reusable spacecraft as various damage modes may occur during its service life.A reconfigurable DBN method is proposed in this *** structure of the DBN can be updated dynamically to describe the interactions between different *** common damages(fatigue and bolt loosening)for a spacecraft structure are considered in a numerical *** results show that the reconfigurable DBN can accurately predict the acceleration phenomenon of crack growth caused by bolt loosening while the DBN with time-invariant structure cannot,even with enough *** definition of interaction coefficients makes the reconfigurable DBN easy to track multiple damages and be extended to more complex *** method also has a good physical interpretability as the reconfiguration of DBN corresponds to a specific *** predictions do not require precise knowledge of reconfiguration conditions,making the method more practical.

关键词： Dynamic Bayesian network Reusable spacecraft Damage Reconfiguration

Compressive Sensing Based Wireless Localization in Indoor Scenarios

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China Communications 2012年第4期9卷 1-12页

作者： Cui Qimei Deng jingang zhang Xuefei Key Laboratory of Universal Wireless Communications Beijing University of Posts and Telecommunications Ministry ofEducation Beijing 100876 P. R. China

The sparse nature of location finding in the spatial domain makes it possible to exploit the Compressive Sensing (CS) theory for wireless ***-based location algorithm can largely reduce the number of online measurements while achieving a high level of localization accuracy,which makes the CS-based solution very attractive for indoor ***,CS theory offers exact deterministic recovery of the sparse or compressible signals under two basic restriction conditions of sparsity and *** order to achieve a good recovery performance of sparse signals,CS-based solution needs to construct an efficient CS *** model must satisfy the practical application requirements as well as following theoretical *** this paper,we propose two novel CS-based location solutions based on two different points of view:the CS-based algorithm with raising-dimension pre-processing and the CS-based algorithm with Minor Component Analysis (MCA).Analytical studies and simulations indicate that the proposed novel schemes achieve much higher localization accuracy.

关键词： wireless localization fingerprinting compressive sensing minor component analysis received signal strength

Detection sensor technology in electromechanical integration Present situation, application and development

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科技展望 2015年第20期 136-137页

作者： jingang zhang China aluminium co. LTD. lanzhou branch

under the impetus of the science and technology, mechanical and electrical integration of the system in our country has obtained widespread application in most areas, sensors as the core of the detection system device, in the composition of the electromechanical integration is very important. It can effectively realize the automatic adjustment and automatic control of electromechanical integration, for the mechanical and electrical integration of the development of our country is plays an important role in promoting, in this paper, the current situation of application of the detection sensor technology in the application of electromechanical integration status quo and the future trend of the development of a brief analysis.

关键词： detection sensor technology Mechanical and electrical integration Application

Optical–digital joint design of refractive telescope using chromatic priors

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Chinese Optics Letters 2019年第5期17卷 68-71页

作者： jingang zhang Yunfeng Nie Qiang Fu Yifan Peng Key Laboratory of Computational Optics Imaging Technology Chinese Academy of SciencesBeijing 100094China University of Chinese Academy of Sciences Beijing 100049Beijing Brussel Photonics Department of Applied Physics and PhotonicsVrije Universiteit Brussel1050 IxellesBelgium King Abdullah University of Science and Technology Thuwal 23955-6900Saudi Arabia The University of British Columbia Vancouver V6T 1Z4Canada

The conventional optical system design employs combinations of different lenses to combat aberrations, which usually leads to considerable volume and weight. In this Letter, a tailored design scheme that exploits state-of-the-art digital aberration correction algorithms in addition to traditional optics design is investigated. In particular, the proposed method is applied to the design of refractive telescopes by shifting the burden of correcting chromatic aberrations to software. By enforcing cross-channel information transfer in a post-processing step, the uncorrected chromatic aberrations are well-mitigated. Accordingly, a telescope of F-8, 1400 mm focal length, and 0.14° field of view is designed with only two lens elements. The image quality of the designed telescope is evaluated by comparing it to the equivalent designs with multiple lenses in a traditional optical design manner, which validates the effectiveness of our design scheme.

关键词： Optical-digital joint design refractive telescope combat aberrations

红外测温技术在氧化锌避雷器带电检测中的应用

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高压电器 2015年第6期51卷 200-204页

作者：张金岗国网山东省电力公司检修公司济南250021

氧化锌避雷器是保证电力系统安全运行的重要保护设备之一,主要用于限制由线路传来的雷电过电压或由操作引起的内部过电压,其缺陷故障可引起本体爆炸,危及整座变电站甚至电网的安全运行,因此在电力运行中一直非常重视其运行状态的检测。... 详细信息

氧化锌避雷器是保证电力系统安全运行的重要保护设备之一,主要用于限制由线路传来的雷电过电压或由操作引起的内部过电压,其缺陷故障可引起本体爆炸,危及整座变电站甚至电网的安全运行,因此在电力运行中一直非常重视其运行状态的检测。该文结合一起红外测温技术诊断500 k V氧化锌避雷器运行状态的案例,分析了红外测温技术发现500 k V氧化锌避雷器受潮缺陷的有效性及重要作用,认为在氧化锌避雷器带电检测工作中应用红外测温技术很有必要。

关键词：红外测温氧化锌避雷器带电检测受潮电阻片

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受贿罪罪刑配置问题之反思与消解

政治与法律 2019年第9期 55-63页

作者：张金钢华东政法大学法律学院

如何妥当配置受贿罪的罪刑体系,不仅是刑法理论界争论不衰的议题,更是关乎受贿罪惩治预防效果的实务难题。当前我国受贿罪的罪刑体系配置条款存在诸多缺陷,同时因为我国《关于办理贪污贿赂刑事案件适用法律若干问题的解释》违背立法规定... 详细信息

如何妥当配置受贿罪的罪刑体系,不仅是刑法理论界争论不衰的议题,更是关乎受贿罪惩治预防效果的实务难题。当前我国受贿罪的罪刑体系配置条款存在诸多缺陷,同时因为我国《关于办理贪污贿赂刑事案件适用法律若干问题的解释》违背立法规定,提升受贿罪的入罪门槛,导致数额模式的不当回归,容易带来罪刑评价不足、罪责刑失衡的问题,不利于有效预防、公正量刑和刑罚目的的实现。应构建以情节为中心的法定刑评价模式,同时以受贿人违背职责义务程度作为情节轻重的标准;实现受贿罪刑罚设置的独立化;转变治理贿赂犯罪的刑事立法理念。在以保障人权、打击犯罪为最高宗旨的刑法领域,受贿罪的罪刑配置应做到立法协调合理、司法衔接有序、量刑科学公正。

关键词：受贿罪罪刑配置《刑法修正案(九)》情节中心论