检索结果-南通市图书馆

An effective approach for bonding of TZM and Nb-Zr system:Microstructure evolution,mechanical properties,and bonding mechanism

在线全文

学校读者我要写书评

暂无评论

journal of Materials Science & Technology 2021年第25期84卷 16-26页

作者： Z.W.Yang j.M.Lin j.F.Zhang Q.W.Qiu Y.Wang D.P.Wang j.song Tianjin Key Lab of Advanced joining Technology School of Materials Science and EngineeringTianjin UniversityTianjin300072China Department of Mining and Materials Engineering McGill UniversityMontréalQuébecH3A 0C5Canada

A novel method of liquid metallic film(LMF)bonding was developed to join titanium zirconium molybdenum alloy(TZM)and Nb-Zr alloy with a Ni *** this method,a Ni-Zr liquid phase was formed by the eutectic reaction and then squeezed out from the gap due to a transient pressure,leaving an *** not only achieved a reliable metallurgical bonding but also served as a transition layer between TZM and Nb-Zr alloy to reduce the mismatch between them thus further improving its *** bonding mechanism of the TZM and Nb-Zr system was discussed based on theoretical calculation and high-resolution microscopy *** advantages of this method were established by comparing the microstructure and mechanical properties of LMF bonded joints with that of traditional contact-reaction brazing and direct diffusion ***,the feasibility of the LMF bonding method was also demonstrated by the reliable joining of other high-temperature and immiscible systems.

关键词： Bonding Titanium zirconium molybdenum alloy(TZM) Diffusion Microstructure Mechanical properties

Controlled buckling of thin film on elastomeric substrate in large deformation

在线全文

学校读者我要写书评

暂无评论

Theoretical & Applied Mechanics Letters 2011年第2期1卷 8-11页

作者： C.Chen W.Tao Z.j.Liu Y.W.Zhang j.song Department of Mechanical and Aerospace Engineering University of MiamiCoral GablesFL 33146 Institute of Applied Mechanics Zhejiang UniversityHangzhou 310027China Institute of High Performance Computing 1 Fusionopolic Way#16-16 Connexis138632Singapore

Electronic systems with large stretchability have many applications.A precisely controlled buckling strategy to increase the stretchability has been demonstrated by combining lithographically patterned surface bonding chemistry and a buckling *** buckled geometry was assumed to have a sinusoidal form,which may result in errors to determine the strains in the film.A theoretical model is presented in this letter to study the mechanics of this type of thin film/substrate system by discarding the assumption of sinusoidal buckling *** is shown that the previous model overestimates the deflection and curvature in the thin *** results from the model agree well with finite element simulations and therefore provide design guidelines in many applications ranging from stretchable electronics to micro/nano scale surface patterning and precision metrology.

关键词： thin film buckling large deformation

High conductive gate leakage current channels induced by In segregation around screw- and mixed-type threading dislocations in lattice-matched InxAl1-xN/GaN heterostructures

在线全文

学校读者我要写书评

暂无评论

High conductive gate leakage current channels induced by In ...

第十二届全国MOCVD学术会议

作者： F.j.Xu j.song C.C.Huang X.Q.Wang Z.j.Yang B.Shen State Key Laboratory of Artificial Microstructure and Mesoscopic Physics School of PhysicsPeking University

The Ⅲ-nitride alloys are important in the development of optoelectronic and microwave high-power device *** them,the InAlN alloys are much less investigated than InGaN and AlGaN,because it is very difficult to obtain high-quality InAlN layers for the significant difference of thermal stability between InN and AlN.

关键词：

The Adaptation of Suaeda physophora Seedlings to Salinity and Drought Environments

在线全文

cnki会议

学校读者我要写书评

暂无评论

The Adaptation of Suaeda physophora Seedlings to Salinity an...

International Conference on Industrial Technology and Management Science(ITMS 2015)

作者： W.W.Zhao T.T.Fu F.X.Wang Y.G.Xu j.song Key Laboratory of Plant Stress College of Life Science Shandong Normal University

We investigated the effect of combined salinity and drought stress on ion accumulation, membrane permeability in leaves, and seedling survival and shoot dry weight of Suaeda physophora seedlings after they were rewatered. The results showed that drought stress increased leaf Na and Cl content, especially at 400mmol·L Na Cl pretreatment, while drought treatment had no effect on leaf K content after seedlings were pretreated with either 1 or 400mmol·L Na Cl. Shoot dry weight of seedlings decreased during drought treatment compared to control(without drought treatment) regardless the concentrations of salinity after seedlings were rewatered. Drought treatment had less adverse effect on the seedling and leaf survival in seedlings pretreated at 400mmol·L Na Cl than at 1 mmol·L Na Cl after seedlings were rewatered. The present results indicate that seedlings of S. physophora pretreated with salinity can increase seedling survival, and this can help them to adapt to combined salinity and drought stress in arid areas.

关键词： Suaeda physophora Salinity Drought Shoot dry weight

在线全文

cnki会议

学校读者我要写书评

暂无评论

知识产权许可策略探讨

电子知识产权 2009年第7期 67-70页

作者： Esther H.Lim Mandy j.song 美国飞翰律师事务所

中国已成为一个巨大的知识产权许可市场。中国企业在考虑将知识产权许可作为知识产权管理战略的一部分时,有必要做出几个关键决策:是否该取得许可、许可内容以及许可来源。知识产权许可有助于中国公司取得有价值的技术、节省研发费用并... 详细信息

中国已成为一个巨大的知识产权许可市场。中国企业在考虑将知识产权许可作为知识产权管理战略的一部分时,有必要做出几个关键决策:是否该取得许可、许可内容以及许可来源。知识产权许可有助于中国公司取得有价值的技术、节省研发费用并避免商业化的延宕。

关键词：知识产权许可来源许可内容

In-situ production of CO-free hydrogen for PEMFC application by methane catalytic decomposition integrated with Pd membrane hydrogen separation

在线全文

学校读者我要写书评

暂无评论

In-situ production of CO-free hydrogen for PEMFC application...

第九届全国氢能学术会议

作者： Z.P.Shao,j.song,Y.Huang,W.Q.jin,N.P.Xu Nanjing University of Technology,China

＜正＞Since the infrastructure of hydrogen production,storage and transportation is far from matured,the finding of alternative ways for in-situ production of CO-free hydrogen from more reachable fuels is critical towards the commercialization of *** compared to hydrogen methane is a much more available fuel,in many cities of China,the homegas has changed to natural gas,methane is also a main composition of the biogas,which is widely

关键词：

A composite method for mapping quantitative trait loci without interference of female achiasmatic and gender effects in silkworm, Bombyx mori

在线全文

cnki会议

学校读者我要写书评

暂无评论

A composite method for mapping quantitative trait loci witho...

第十二届家（柞）蚕遗传育种暨良种繁育学术研讨会

作者： C.Li W.Zuo X.Tong H.Hu L.Qiao j.song G.Xiong R.Gao F.Dai C.Lu State Key Laboratory of Silkworm Genome Biology Southwest University Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry Southwest University Institute of Entomology and Molecular Biology College of Life Sciences Chongqing Normal University

The silkworm, Bombyx mori, is an economically important insect that was domesticated more than 5000 years ago. Its major economic traits focused on by breeders are quantitative traits, and an accurate and efficient QTL mapping method is necessary to explore their genetic architecture. However, current widely used QTL mapping models are not well suited for silkworm because they ignore female achiasmate and gender effects. In this study, we propose a composite method combining rational population selection and special mapping methods to map QTL in silkworm. By determining QTL for cocoon shell weight（CSW）, we demonstrated the effectiveness of this method. In the CSW mapping process, only 56 markers were used and five loci or chromosomes were detected, more than in previous studies. Additionally, loci on chromosomes 1 and 11 dominated and accounted for 35.10% and 15.03% of the phenotypic variance respectively. Unlike previous studies, epistasis was detected between loci on chromosomes 11 and 22. These mapping results demonstrate the power and convenience of this method for QTL mapping in silkworm, and this method may inspire the development of similar approaches for other species with special genetic characteristics.

关键词： Bombyx mori cocoon shell weight genetic architecture population selection quantitative trait loci mapping

Superconductivity Observed in Tantalum Polyhydride at High Pressure

在线全文

cnki会议

学校读者我要写书评

暂无评论

Chinese Physics Letters 2023年第5期40卷 90-93页

作者：何鑫张昌玲李芷文张思佳闵保森张俊卢可赵建发史鲁川彭毅望贤成冯少敏宋静王鲁红 V.B.Prakapenka S.Chariton 刘浩哲靳常青 Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100190China songshan Lake Materials Laboratory Dongguan 523808China Shanghai Advanced Research in Physical Sciences Shanghai 201203China Department of Geology University of Illinois at Urbana ChampaignUrbanaIllinois 61801USA Center for Advanced Radiations Sources University of ChicagoChicagoIllinois 60637USA Center for High Pressure Science&Technology Advanced Research Beijing 100094China

We report experimental discovery of tantalum polyhydride *** was synthesized under highpressure and high-temperature conditions using diamond anvil cell combined with in situ high-pressure laser heating *** superconductivity was investigated via resistance measurements at *** highest superconducting transition temperature T_(c)was found to be~30 K at 197 GPa in the sample that was synthesized at the same pressure with~2000 K *** transitions are shifted to low temperature upon applying magnetic fields that support the superconductivity *** upper critical field at zero temperatureμ_0H_(c2)(0)of the superconducting phase is estimated to be~20 T that corresponds to Ginzburg-Landau coherent length~40 *** results suggest that the superconductivity may arise from 143d phase of TaH_(3).It is,for the first time to our best knowledge,experimental realization of superconducting hydrides for the VB group of transition metals.

关键词： hydride resistance superconductivity

利用MRI引导下进行经皮同轴切割针刺活检的可行性

在线全文

学校读者我要写书评

暂无评论

国际医学放射学杂志 2013年第6期 606-606页

作者： M.Liu Y.Lv L.Wu j.song R.B.Sequeiros C.Li 刘静彭景 Department of Interventional MRI Shandong Medical Imaging Research Institute Shandong University

摘要目的旨在前瞻性地评估小(直径≤2.0 cm)肺结节在MRI引导下经皮同轴切割穿刺活检的可行性、安全性和准确性。方法具有96个小肺结节的96例病人(男56例,女

关键词： MR 介入放射学肺活检技术引导