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Rare Metals 2018年第9期37卷 778-788页

作者： Xue-Mei Yang Hong-Zhen Guo Ze-Kun Yao Shi-Chong Yuan she-wei Xin School of Materials Science and Engineering Northwestern Polytechnical University Deyang Wan Hang Die Forging Co. Ltd.China National Erzhong Group Co. Titanium Alloy Research Center Northwest Institute for Nonferrous Metal Research

The high-temperature plastic deformation behavior of BT25y alloy with an initial equiaxed microstructure was investigated by hot compression tests. Processing maps were established to evaluate the power dissipation efficiency （η） and identify the flow instability regions. When the strain reaches steady state, the optimum processing window is distributed in the area covering most of the studied deformation temperatures and strain rates of 1 × 10-2 to 1× 10-1 s-1. True strain has great effects on the power dissipation efficiency under the condition of 880 ℃/1× 10-3 s-1, but the efficiency values remain approximately constant （η= 0.40） at conditions of 900-940 ℃/1× 10-2 to 1 × 10-1 S-1 and 980-1000 ℃/ 1× 10-1 s- 1. Besides, the instability regions are distributed in high strain rate areas no matter how many of the strains. Based on the processing map and microstructural observa- tion, it can be concluded that the deformation mechanisms related to Region I with small strain rate and lower temper- ature in α＋β phase field, Region II with medium strain rate and higher temperature inα＋β phase field, Region III with medium strain rate and high temperature in βphase field are superplasticity and strain-induced transformation, dynamicrecrystallization （DRX） and phase transformation, β phase dynamic recovery and local DRX, respectively.

关键词： BT25y alloy Hot deformation Processingmap Microstructural evolution

Thermal upgrading of Hui-style vernacular dwellings in China using foam concrete

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Frontiers of Architectural Research 2012年第1期1卷 23-33页

作者： Xing Shi wei she Hailong Zhou Yunshen Zhang Fei shi wei Chen Key Laboratory of Urban and Architectural Heritage Conservation Ministry of EducationSchool of ArchitectureSoutheastUniversityNanjing 210096China bKey Laboratory of Urban and Architectural Heritage Conservation Ministry of EducationSchool of Material Science and TechnologySoutheast UniversityNanjing 210096China Shandong lnstitute of Architectural Design and Research Shandong 250001China

Architecturat heritage conservation is an important field in architectural research. The Hui-styte vernacutar dwetling is an essentialarchitectural heritage of China. Its hollow watt system, with horsehead-like upper corners, is a distinct architecturat feature that is worth preserving. However, the thermat performance of the hollow watt is relatively poor by today＇s standard. The current study developed a novel approach, whereby foam concrete was used to fill the voids inside the holtow watt to improve its thermat resistance. This approach was deemed cost effective, easy to learn, and capable of preserving the architectural integrity of the watt. Different types of foam concrete were prepared and tested. Testing results showed that the material properties of foam concrete are suitabte for thermaUy upgrading the hollow watt system. Ctimate chamber testing was conducted to investigate the effectiveness of the proposed thermat upgrading strategy. The testing resutts suggested that tilting the voids with foam concrete can effectively improve the overall thermal resistance of the holtow watt system by 24%, which is almost equal to the overall thermal resistance when using the more expensive commercial inorganic stucco system.

关键词： Hui-styLe vernaculardweLLins Thermal upgrade Foam concrete Architectural heritase

Study on the Relationship Between Sex Differentiation and Ethylene in Ramie

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Agricultural Sciences in China 2009年第4期8卷 418-423页

作者： XING Hu-cheng she wei LUO Zhong-qin QIN Zhan-jun JIE Yu-cheng Ramie Research Institute Hunan Agricultural University Changsha 410128 P.R.China Institute of Bast Fiber Crops Chinese Academy of Agricultural Sciences Changsha 410205 P.R. China

To explore the role of ethylene in sexual determination in ramie, the ethylene release rates in ramie stem apex of different sex, bud of the same node in female and hermaphrodite ramie in the second crop, and single inflorescence of different sex in hermaphrodite ramie were measured by gas chromatography. Effects of two ethylene inhibitors on sex expression in ramie were investigated. The ethylene release rate of stem apex was higher in the second crop or female ramie than that in the third crop or hermaphrodite ramie during growth. Although ethylene release rates between lower nodes and higher nodes were little different, it was lower in the middle nodes in hermaphrodite ramie. The ethylene release rates were higher in the higher nodes of female ramie at the second crop. At the third crop, the ethylene release rates were higher in lower nodes, lower in middle nodes and then highest in higher nodes in female ramie. However, an opposite ethylene release pattern was observed in hermaphrodite ramie. The ethylene release rate was higher in female flower than male flower and mixed inflorescence in hermaphrodite ramie. The male flower could be distinctly induced by AVG （aminooethoxyvinylglycine）. The node of the first male flower, percentage of female flowers and ratio of female flowers to male in ramie were evidently depressed by AVG in contrast to water. The percentage of mixed male and female flowers was also increased and the percentage of female flower decreased by spraying AgNO3. There was a close relationship between sexual differentiation and ethylene release rate in ramie. The female ramie could be induced by high ethylene release rate. The female flower could be inhibited by AVG and AgNO3. AVG at a concentration of 300 mg L^-1 was most effective.

关键词： ramie [Boehmeria nivea (L.) Gaud] sex ethylene

基于X射线衍射形貌术的碲锌镉晶体样品制备方法研究

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红外 2024年第9期45卷 23-28页

作者：王琰璋刘江高李振兴柏伟李乾折伟林华北光电技术研究所北京100015

基于传统X射线衍射形貌术(X-Ray diffraction Topography,XRT)的碲锌镉晶体样品制备方法是通过对测试晶片进行磨抛加工,获得满足测试条件的表面。随着单晶晶片尺寸的增大,晶片磨抛加工的难度变大、耗时变长,而且还容易导致晶片损坏。针... 详细信息

基于传统X射线衍射形貌术(X-Ray diffraction Topography,XRT)的碲锌镉晶体样品制备方法是通过对测试晶片进行磨抛加工,获得满足测试条件的表面。随着单晶晶片尺寸的增大,晶片磨抛加工的难度变大、耗时变长,而且还容易导致晶片损坏。针对上述问题,通过对切割研磨后的晶片腐蚀方法进行研究,获得了一种新的XRT样品制备方法。该方法能够快速去除晶片的表面损伤,获得满足XRT测试要求的晶片表面,大幅减小制样难度并缩短制样时间。使用该方法制备的样品X射线衍射形貌图像衬度均匀、信噪比较好,各类型晶体缺陷均可被检测出来。此技术能够很好地应用于大尺寸碲锌镉晶片的后续筛选和加工。

关键词：碲锌镉晶体 X射线衍射形貌术晶体缺陷

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基于被动视觉的三维重建技术研究进展

郑州大学学报（理学版） 2024年第5期56卷 13-19页

作者：王兆庆牛朝一佘维宰光军梁波易建锋李英豪郑州大学网络空间安全学院河南郑州450002 许继电气股份有限公司河南许昌461000 郑州市区块链与数据智能重点实验室河南郑州450002 中国石油化工股份有限公司中原油田分公司信息化管理中心河南濮阳457001

基于被动视觉的三维重建技术方法多样、应用广泛。按照不同的分类方法,对基于被动视觉的三维重建技术研究进展进行了分析总结。首先,根据采集装置的数量进行分类,介绍了基于单目视觉、双目视觉和多目视觉的三维重建技术,并对各种方法的... 详细信息

基于被动视觉的三维重建技术方法多样、应用广泛。按照不同的分类方法,对基于被动视觉的三维重建技术研究进展进行了分析总结。首先,根据采集装置的数量进行分类,介绍了基于单目视觉、双目视觉和多目视觉的三维重建技术,并对各种方法的优缺点进行比较。其次,根据不同应用方法进行分类,对运动恢复结构法和深度学习法的研究进展进行了阐述。最后,对基于被动视觉的三维重建方法进行了综合对比分析,并对三维重建的应用和发展进行了展望。

关键词：三维重建被动视觉单目视觉双目视觉多目视觉运动恢复结构深度学习

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浅谈2023年服装纺织品质量安全

中国纤检 2024年第8期 51-55页

作者：陈政易锋吴楠佘伟李喜王利娟四川省市场监督管理局四川成都610000 四川省纤维检验局四川成都610000

本文归集整理了部分地方市场监管部门2023年发布的服装纺织品监督抽查情况以及国内外召回、网络舆情信息、消费投诉等信息,分析了存在的突出问题,为深化开展服装纺织品质量安全监管提供参考。

关键词：质量安全监管风险服装纺织品分析

Thermally insulating and fire-retardant bio-mimic structural composites with a negative Poisson's ratio for battery protection

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Carbon Energy 2023年第12期5卷 83-96页

作者： Fengyin Du Zuquan Jin Ruizhe Yang Menglong Hao Jiawei Wang Gang Xu Wenqiang Zuo Zifan Geng Hao Pan Tian Li wei Zhang wei she Jiangsu Key Laboratory of Construction Materials School of Materials Science and EngineeringSoutheast UniversityNanjingPeople's Republic of China School of Mechanical Engineering Purdue UniversityWest LafayetteIndianaUSA State Key Laboratory of High-Performance Civil Engineering Materials Jiangsu Sobute New Materials Co.Ltd.NanjingPeople's Republic of China School of Civil Engineering Qingdao University of TechnologyQingdaoPeople's Republic of China Department of Mechanical and Aerospace Engineering University at BuffaloThe State University of New YorkBuffaloNew YorkUSA School of Energy and Environment Southeast UniversityNanjingPeople's Republic of China Jiangsu Key Laboratory of Advanced Metallic Materials School of Materials Science and EngineeringSoutheast UniversityNanjingPeople's Republic of China

Battery safety has attracted considerable attention worldwide due to the rapid development of wearable electronics and the steady increase in the production and use of electric *** battery failures are often associated with mechanical-thermal coupled behaviors,protective shielding materials with excellent mechanical robustness and flame-retardant properties are highly desired to mitigate thermal ***,most of the thermal insulating materials are not strong enough to protect batteries from mechanical abuse,which is one of the most critical scenarios with catastrophic ***,inspired by wood,we have developed an effective approach to engineer a hierarchical nanocomposite via self-assembly of calcium silicate hydrate and polyvinyl alcohol polymer chains(referred as CSH wood).The versatile protective material CSH wood demonstrates an unprecedented combination of light weight(0.018 g cm-3),high stiffness(204 MPa in the axial direction),negative Poisson's ratio(-0.15),remarkable toughness(6.67×105 J m-3),superior thermal insulation(0.0204 W m-1 K-1 in the radial direction),and excellent fire retardancy(UL94-V0).When applied as a protective cover or a protective layer within battery packages,the tough CSH wood can resist high-impact load and block heat diffusion to block or delay the spread of fire,therefore significantly reducing the risk of property damage or bodily injuries caused by battery *** work provides new pathways for fabricating advanced thermal insulating materials with large scalability and demonstrates great potential for the protection of electronic devices.

关键词： battery protection negative Poisson's ratio thermal insulation toughness wood-inspired materials

Transumbilical single-port laparoscopic cholecystectomy： a case report

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Chinese Medical Journal 2008年第23期121卷 2463-2464页

作者： GUO wei ZHANG Zhong-tao HAN wei LI Jian-she JIN Lan LIU Jun ZHAO Xiao-mu WANG Yu Department of General Surgery Beijing Friendship Hospital Capital Medical University Beijing 100050 China

Recently, scarless surgery has become a widely used surgical technique, which has made considerable progress owing to extensive animal model studies and clinical trials. Here, we report the first case of transumbilica... 详细信息

关键词： laparoscopic cholecystectomy clinical trials mainland China animal model

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高温热处理对碲锌镉衬底中Zn组分的影响

激光与红外 2024年第5期54卷 741-745页

作者：范叶霞刘江高张立超周振奇李振兴折伟林中国电子科技集团公司第十一研究所北京100015

随着高性能碲镉汞红外探测器对碲锌镉衬底质量要求的不断提高,研制高质量的碲锌镉衬底材料势在必行。本文采用真空高温热处理温场与源控制的衬底高温热处理工艺,系统地研究了主要热处理参数对碲锌镉衬底中Zn组分的影响,给出了Zn组分控... 详细信息

随着高性能碲镉汞红外探测器对碲锌镉衬底质量要求的不断提高,研制高质量的碲锌镉衬底材料势在必行。本文采用真空高温热处理温场与源控制的衬底高温热处理工艺,系统地研究了主要热处理参数对碲锌镉衬底中Zn组分的影响,给出了Zn组分控制的热处理经验公式,初步获得了碲锌镉衬底中Zn组分的成分控制和高组分均匀性分布的方法,提高了碲锌镉衬底质量。

关键词：碲锌镉性能改进 Zn组分组分可调组分均匀分布

Existence of Invariant Tori for Certain Weakly Reversible Mappings

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Acta Mathematica Sinica,English Series 2002年第4期18卷 701-718页

作者： Bao she wei Department of Mathematics, Nanjing University. Nanjing 210093. P. R. China Department of Mathematics Nanjing University Nanjing P. R. China

In this paper, we consider certain mappings. M, sufficiently close to an integrable one, which is weakly reversible with respect to the mappings G sufficiently close to an involution of type (m.n). where m, n∈Z_+ are arbitrary. Under some weak non-degeneracy condition, we construct a uniform KAM iteration for proving the existence of a Cantor family of m-tori invariant under the reversible mappings M and the reversing mapping G.

关键词： Weakly reversible mappings Weakly undegenerate condition Invariant tori