检索结果-南通市图书馆

Chinese Journal of Polymer Science 2013年第3期31卷 407-418页

作者： Chun-zhu Yan Lin Guo 孙晓丽闫寿科 isao takahashi School of Chemistry and Environment Beihang University State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology School of Science and Technology Kwansei Gakuin University

The specular and off-specular X-ray reflectivities were efficiently employed to study the evolution of surface morphology as a function of temperature in a single layer of poly（3-hydroxybutyrate）（PHB） and a bilayer of PHB/poly（vinyl phenol）（PVPh） on Si substrates. The results indicate that the changes of thickness and surface roughness caused by pre-melting of PHB crystals are not obvious for the single layer, whereas the surface roughness of the PHB layer and the intensity of the off-specular X-ray reflectivity for the bilayer exhibit a remarkable non-monotonic change in the temperature range of 100-150℃; the roughness parameter evaluated by the specular X-ray reflectivity reaches its maximum at 120℃. The interaction at the interface between PVPh and PHB certainly contributes to the non-monotonic changes. Such interaction also affects the crystallization and melting behavior of PHB thin film greatly. The crystallization of PHB thin film is inhibited even on the glassy surface of PVPh sublayer, In the melting process, the PHB crystals on PVPh sublayer feature a threesection melting curve separated by a plateau region of 120-140℃.

关键词： Interface Hydrogen-bond Roughness Melt.

可生物降解高分子PLLA／PHB混合薄膜结晶性的研究

在线全文

学校读者我要写书评

暂无评论

中山大学学报（自然科学版） 2011年第5期50卷 44-49页

作者：葛骏李志兵高椅功中山大学物理科学与工程技术学院∥光电材料与技术国家重点实验室广东广州510275 関西学院大学理工学部物理学研究科日本兵库帛三田市6691337

利用掠入射X射线衍射法(GIXD)对PLLA和PHB混合制成的薄膜进行研究。通过改变两者的混合比、分子量、膜厚等参数,观察PHB的加入对混合薄膜中PLLA的结晶性的影响,并与相同条件下可以近似视为本体的滴膜进行对比。实验发现在升温结晶的过程... 详细信息

利用掠入射X射线衍射法(GIXD)对PLLA和PHB混合制成的薄膜进行研究。通过改变两者的混合比、分子量、膜厚等参数,观察PHB的加入对混合薄膜中PLLA的结晶性的影响,并与相同条件下可以近似视为本体的滴膜进行对比。实验发现在升温结晶的过程中,PHB的加入明显地提高了混合薄膜中PLLA的结晶性,同时还降低了PLLA的结晶温度并提高了熔融温度。但是在本体中却没有观察到这一现象。相对于分子量较大的PLLA,分子量较小的PLLA与PHB混合后结晶性的提升更为显著。

关键词：聚乳酸聚羟基丁酸酯高分子混合薄膜结晶性

Local Structure Analysis of an Automobile Catalyst La1.02Fe0.95Pd0.05O3 by Pd K-edge XAFS

在线全文

学校读者我要写书评

暂无评论

Local Structure Analysis of an Automobile Catalyst La1.02Fe0...

Scalable fabrication of microneedle arrays via spatially controlled UV exposure

亚洲晶体学联合大会

作者： Shoshi Higuchi Daiju Matsumura Yasuo Nishihata Jun’iciro Mizuki Hikaru Terauchi isao takahashi Masashi Taniguchi Mari Uenishi Hirohisa Tanaka Kimiyoshi Kaneko Kwansei-Gakuin University 2-1 GakuenSanda Hyogo 669-1337Japan Synchrotron Radiation Research Center Japan Atomic Energy AgencySayoHyogo 679-5148Japan

＜正＞A La1.02Fe0.95Pd0.05O3（LFPO） catalyst has special feature which maintains high catalytic property even in long time use, while an alumina catalyst employs a sufficient excess of precious metals to ensure the a...

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Microsystems & Nanoengineering 2016年第1期2卷 73-81页

作者： Hidetoshi takahashi Yun Jung Heo Nobuchika Arakawa Tesuo Kan Kiyoshi Matsumoto Ryuji Kawano isao Shimoyama Department of Mechano-Informatics Graduate School of Information Science and Technologythe University of Tokyo7-3-1 HongoBunkyo-kuTokyo 113-8656Japan Department of Mechanical Systems Engineering Graduate School of EngineeringTokyo University of Agriculture and Technology2-24-16 Naka-choKoganei-shiTokyo 184-8588Japan Department of Mechanical Engineering and Intelligent Systems Graduate School of Informatics and Engineeringthe University of Electro-Communications1-5-1 ChofugaokaChofu-shiTokyo 182-8585Japan IRT Research Initiative the University of Tokyo7-3-1 HongoBunkyo-kuTokyo 113-8656Japan Department of Biotechnology and Life Science Graduate School of EngineeringTokyo University of Agriculture and Technology2-24-16 Naka-choKoganei-shiTokyo 184-8588Japan

This paper describes a theoretical estimation of the geometry of negative epoxy-resist microneedles prepared via inclined/rotated ultraviolet(UV)lithography based on spatially controlled UV exposure *** comparison with other methods based on UV lithography,the present method can create microneedle structures with high *** negative photoresist is exposed to inclined/rotated UV through circular mask patterns,a three-dimensional,needle-shaped distribution of the exposure dose forms in the irradiated *** the inclination angles and the exposure dose modifies the photo-polymerized portion of the photoresist,thus allowing the variation of the heights and contours of microneedles formed by using the same mask *** an experimental study,the dimensions of the fabricated needles agreed well with the theoretical predictions for varying inclination angles and exposure *** results demonstrate that our theoretical approach can provide a simple route for fabricating microneedles with on-demand *** fabricated microneedles can be used as solid microneedles or as a mold master for dissolving microneedles,thus simplifying the microneedle fabrication *** envision that this method can improve fabrication accuracy and reduce fabrication cost and time,thereby facilitating the practical applications of microneedle-based drug delivery technology.

关键词： inclined/rotated lithography microneedle array UV exposure ratio

Fabrication of MoSi_2-SiC Composites by a Spark Plasma Sintering Method

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 1999年第2期13卷 116-118页

作者： Kurokawa, Kazuya Ube, Makoto takahashi, Hideaki takahashi, Heishichiro Division of Molecular Chemistry Graduate School of Engineering Hokkaido University Kita-ku Sapporo 060-8628 Kita-13 Nishi-8 Japan Center for Advanced Research of Energy Technology Hokkaido University Japan

MolybdenUmdisilicidepeoSi,)hashighmeltingpoint（2293K）,relativelylowdensity（6.249/cm3）,abrittle-to-ductiletemper;tabout1173K[l]andoutstandingoxidationresistance[2M].Forthisreason,thedisilicidematrixcompositesarebei... 详细信息

关键词： MoSi2-SiC composite spark plasma sintering in-siam Synthesis sintering behavior

Ultrasonic echo signal fetures of dissimilar material bonding joints

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 2004年第6期14卷 1050-1054页

作者：刚铁 Yasuo takahashi State Key Lab of Advanced Welding Production Technology Harbin Institute of Technology Harbin 150001 China JWRI Osaka University Japan

An ultrasonic evaluation method of echo feature of diffusion bond joint between two dissimilar materials is presented. The echo signal was acquired by an automatic ultrasonic C-scan test system. It is found that the intensity of echo and its phase can be used to evaluate the joint quality, and interface products of dissimilar materials bonding can be evaluated by ultrasonic method.

关键词：超声波测试异金属扩散结合非破坏性演化

Creep and creep-fatigue behavior of high chromium steel weldment

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2011年第3期24卷 175-182页

作者： Yukio takahashi Masaaki TABUCHI Materials Science Laboratory Central Research Institute of Electric Power Industry National Institute of Material Sciences

Strength of welded joints of high chromium steels is one of the important concerns for fabricators and operators of ultra supercritical thermal power plants. A number of creep as well as creep-fatigue tests with tensile hold have been carried out on the welded joints of two types of high chromium steels widely used in Japan, i.e. Grade 91 and 122 steels. It was found that failure occurred in fine grain heat-affected zone in all the creep-fatigue tests, even at a relatively low temperature and fairly short time where failure occurred in plain base metal region in simple creep testing. Four procedures were used to predict failure lives and their results were compared with the test results. A newly proposed energy-based approach gave the best estimation of failure life, without respect of the material and temperature.

关键词： Creep Creep-fatigue High chromium steel Life prediction Welded joint

Preface of the Special Issue: Queueing Systems and Engineering Applications

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science and Systems Engineering 2019年第2期28卷 129-131页

作者： Wuyi Yue Yutaka takahashi Department of Intelligence and Informatics Konan University Kobe 658-8501 Japan Graduate School of Informatics Kyoto University Kyoto 606-8501 Japan

This volume of the Journal of Systems Science and Systems Engineering is devoted to the extended versions of papers selected and presented at the 12th International Conference on Queueing Theory and Network Applicatio... 详细信息

关键词： Systems 12th Applications

Short-fetch high waves during the passage of 2019 Typhoon Faxai over Tokyo Bay

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Earth Science 2022年第1期16卷 206-219页

作者： Hiroshi TAKAGI Atsuhei takahashi School of Environment and Society Tokyo Institute of TechnologyTokyo 152-8550Japan

The risk of wind waves in a bay is often overlooked,owing to the belief that peninsulas and islands will inhibit high ***,during the passage of a tropical cyclone,a semi-enclosed bay is exposed to twodirectional waves:one generated inside the bay and the other propagated from the outer *** Faxai in 2019 resulted in the worst coastal disaster in Tokyo Bay in the last few *** authors conducted a post-disaster survey immediately after this *** modeling was also performed to reveal the mechanisms of unusual high *** significant high-wave damage occurred on coasts facing the Pacific *** contrast,Fukuura-Yokohama,which faces Tokyo Bay,suffered overtopping waves that collapsed *** precisely reproduce multi-directional waves,the authors developed an extended parametric typhoon model,which was embedded in the JMA mesoscale meteorological model(JMA-MSM).The peak wave height was estimated to be 3.4 m off the coast of Fukuura,in which the contribution of the outer-sea waves was as low as 10%–20%.A fetchlimited wave developed over a short distance in the bay is considered the primary mechanism of the high *** maximum wave occurred on the left-hand side of the typhoon track in the bay,which appears to be contrary to the common understanding that it is safer within the semicircle of a storm than on the opposite *** Faxai was a small typhoon;however,if the radius was tripled,it is estimated that the wave height would exceed 3 m over the entire bay and surpass 4 m off the coasts of Yokohama and Chiba.

关键词： Typhoon Faxai Tokyo Bay high waves short fetch overtopping wave hindcasting parametric typhoon JMA-MSM storm surge

Challenges for beyond 5G:ultra-densification of radio access network

在线全文

学校读者我要写书评

暂无评论

通信学报 2020年第11期41卷 1-11页

作者： Fumiyuki Adachi Ryo takahashi Hidenori Matsuo Research Organization of Electrical Communication Tohoku UniversitySendai 980-8577Japan

Ultra-densification of radio access network(RAN)is a key to efficiently support the exponentially growing mobile data traffic in 5 G ***,extremely high frequency band like mm Wave band was utilized to solve the bandwidth shortage ***,untra-dense reusing the same radio resource produced severe *** the mm Wave link was very harsh due to frequent blockage by *** a new RAN architecture needed to be introduced to realize ultra-reliable communications in such a severe radio propagation *** architecture of distributed MIMO based RAN was ***,enhanced interference coordination(e IC)was ***,the effectiveness of distributed MIMO based RAN with e IC by computer simulation was showed.

关键词： 5G advanced systems distributed MIMO radio access network interference coordination cooperative signal transmission