检索结果-内蒙古大学图书馆

Zairyo to Kankyo/ Corrosion engineering 2004年第6期53卷 329-336页

作者： Itagaki, Masayuki Hirata, Yoichi Watanabe, Kunihiro Hishinuma, Takashi Machizawa, Kenji Department of Pure Chemistry Faculty of Science and Technology Tokyo University of Science 2641 Yamazaki Noda 278-8510 Japan Hitachi Kyowa Engineering Co. Ltd. 3-10-2 Bentencho Hitachi 317-0072 Japan Hitachi Building System Co. Ltd. 603 Kanndatucho Tsuchiura 300-0013 Japan

The electrochemical reactions of copper and carbon steel in LiBr solution have been investigated by electrochemical measurements including channel flow double electrode (CFDE) and electrochemical quartz crystal microbalance (EQCM). The active dissolution mechanism of copper in LiBr solution was proposed as follows. Cu + Br-&rarrCuBr + e-, CuBr + Br -&rarrCuBr2-. The disproportional reaction of copper (Cu + Cu2+ =Cu+) in LiBr solution was discussed by CFDE. The disproportional reaction rate was evaluated by detecting Cu(I) emitted from Cu working electrode in LiBr solution containing Cu (II) at an open circuit condition. It was found that the disproportional reaction was accelerated by the presence of LiBr, and the total reaction was proposed as follows. Cu + Cu2+ +4Br-&rarr2CuBr2 -. The anodic polarization curve of carbon steel in LiBr solution shows the passivation at low anodic overvoltage region and the active dissolution by pitting corrosion at high anodic overvoltage region. Furthermore by using the quartz crystal which has 100 kHz resonant frequency in EQCM, the anodic polarization curve and mass change of steel sheet electrode were measured simultaneosuly. Finally, the replacement reaction of carbon steel in LiBr solution containing Cu (II) was discussed by CFDE and EQCM.

关键词： Electrochemical corrosion

来源：评论

学校读者我要写书评

暂无评论

Customer analysis of monthly-charged mobile content aiming at prolonging subscription period

Customer analysis of monthly-charged mobile content aiming a...

引用

ICCC 2004 - Second IEEE International Conference on Computational Cybernetics

作者： Shono, Yuji Takada, Yohei Komoda, Norihisa Hiramatsu, Ayako Oiso, Hiroaki Fukaya, Kiyoyuki Graduate School of Information Science and Technology Osaka University 2-1 Yamada-oka Suita 565-0871 Japan Department of Information System Engineering Osaka Sangyo University 3-1-1 Nakagaito Daitou Osaka 574-8530 Japan Codetoys K. K. 2-6-8 Nishitenma Kita-ku Osaka 530-0047 Japan Faculty of Business Administration St. Andrew's University 1-1 Manabino Izumi Osaka 594-1198 Japan

ISBN: (纸本)0780385888

Retention of customers is a critical challenge for mobile content providers. This paper presents a customer analysis result aiming at prolonging users' subscription. Based on users' score information, the access log, and so on, customers who are likely to unsubscribe in near future are identified. Regularity is discovered from the unsubscribed users' data using the C4.5 algorithm and a module library is prepared to easily formulate the character sets for the prediction from the users' access log. By using various character sets, the prediction of the users' subscription period was tested by using 6,000 real users' data. We predicted whether a user would unsubscribe within two months, with results showing 72% recall and 65% precision. © 2004 IEEE.

关键词： Mobile telecommunication systems

来源：评论

学校读者我要写书评

暂无评论

Raman scattering investigation of a Ge/SiO2/Si nanocrystal system under hydrostatic pressure

引用

Physical Review B 2004年第12期69卷 125333-125333页

作者： Lei Liu K. L. Teo Z. X. Shen J. S. Sun E. H. Ong A. V. Kolobov Y. Maeda Physics Department Blk. S12 Faculty of Science National University of Singapore 2 Science Drive 3 117542 Singapore Department of Electrical and Computer Engineering National University of Singapore 4 Engineering Drive 3 117576 Singapore Mechatronics & Micro System Group Data Storage Institute 117608 Singapore Center for Applied Near-Field Optics Research (CANFOR) National Institute of Advanced Industrial Science and Technology Tsukuba Central 4 1-1-1 Higashi Tsukuba Ibaraki 305-8562 Japan Department of Energy Science and Technology Kyoto University Sakyo-ku Kyoto 606-8501 Japan

We have studied the hydrostatic pressure dependence of Ge nanocrystals embedded in a SiO2 matrix on a Si substrate by Raman scattering at room temperature. During the first cycle of increasing pressure, we observed a step change in the Ge Raman mode from 310.4 to 313.8cm−1 at ∼23kbar. The linear pressure coefficients α obtained before and after the step change at ∼23kbar are 0.42 and 0.64cm−1kbar−1, respectively. Upon decreasing pressure, the Ge mode follows a single slope of pressure coefficient α=0.64cm−1kbar−1. A finite-element analysis was carried out to investigate the elastic-field distribution in the Ge/SiO2/Si nanocrystal system, where the discontinuity of the specific geometric configuration with different elastic constants causes local areas of stress concentration around the interface. The step change of the Raman shifts with pressure at ∼23kbar was attributed to complete delamination between the SiO2 film and the Si substrate.

关键词：

来源：评论

学校读者我要写书评

暂无评论

A test structure for two-dimensional analysis of MOSFETs by hot-carrier-induced photoemission

A test structure for two-dimensional analysis of MOSFETs by ...

引用

IEEE International Conference on Microelectronic Test Structures

作者： T. Matsuda A. Muramatsu H. Iwata T. Ohzone K. Yamashita N. Koike K. Tatsuuma Department of Electronics and Informatics Toyama Prefectural University Imizu Toyama Japan Faculty of Computer Science and System Engineering Okayama Prefectural University Soja Okayama Japan ULSI Process Technology Development Center Semiconductor Company Matsushita Elecrric Indusrrial Company Limited Minami Kyoto Japan

A test structure and method for two-dimensional analysis of fabrication process and reliability of MOSFET using a photoemission microscope are presented. Arrays of 20/spl times/10(=200) MOSFETs were successfully measured at a time and evaluated the fluctuation of their characteristics. The fluctuation of hot-carrier-induced photoemission intensity was larger as gate length becomes smaller. Although the intensity fluctuation of photoemission in the same MOSFET was within small range, the fluctuation all over the MOSFET array was relatively large and independent of the position in the array.

关键词： MOSFETs Hot carriers Photoelectricity Charge coupled devices Fluctuations Circuit testing Time measurement Optical microscopy Wavelength measurement Electric variables measurement

来源：评论

学校读者我要写书评

暂无评论

Customer analysis of monthly-charged mobile content aiming at prolonging subscription period

Customer analysis of monthly-charged mobile content aiming a...

引用

International Conference on Computational Cybernetics (ICCC)

作者： Y. Shono Y. Takada N. Komoda H. Oiso A. Hiramatsu Y. Fukaya Graduate School of Information Science and Technology Osaka University Suita Japan Codetoys K. K. Kita Osaka Japan Department of Information System Engineering Osaka Sangyo University Daitou Osaka Japan Faculty of Business Administration Saint Andrews University Izumi Osaka Japan

关键词： Subscriptions Data mining Libraries Information science Information systems systems engineering and theory Testing Mobile communication Displays Postal services

来源：评论

学校读者我要写书评

暂无评论

Three-dimensional evaluation of contact surface damages with a scanning laser microscope

Three-dimensional evaluation of contact surface damages with...

引用

第一届电工产品可靠性与电接触国际会议

作者： Makoto Hasegawa Takayoshi Kubono Koichiro Sawa Chitose Institute of Science and Technology 758-65 Bibi Chitose Hokkaido 066-8655 JAPAN Shizuoka Univ. Faculty of Engineering. 3-5-1 Johoku Hamamatsu 432 8561 Japan Keio Univ. Dept of System Design Eng. 3-14-1 Hiyoshi Kohoku-ku Yokohama 223-8522 Japan

The authors have been interested in a Scanning Laser Microscope (SLM) and applied it to studies of contact phenomena. In particular, a digital SLM is being currently used, and confirmed to be a successful tool for investigating the contact phenomena. In this paper, the theory and mechanism of a scanning laser microscope will be presented for demonstrating its usefulness for studies of electrical contact phenomena and contact reliability. Moreover, actual evaluation results of shapes of pips and craters formed by are discharges on electrical contact surfaces will be presented, A new evaluation scheme based on the laser microscope data will be also introduced for detailed study of reliability of electrical contacts.

关键词： Index Terms-Electrical contacts, Erosion, Material transfer, Laser microscope

来源：评论

学校读者我要写书评

暂无评论

A Solution to Shape Optimization Problems for the Rigidity design of Plate and Shell Structures

A Solution to Shape Optimization Problems for the Rigidity D...

引用

The Sixth World Congress on Computational Mechanics in Conjunction with the Second Asian-Pacific Congress on Computational MechanicsⅠ

作者： Masatoshi Shimoda Jiro Tsuji Yasuhiro Kanda Hisayuki Ishizu Hideyuki Azegami Department of Mechanical Design Engineering Shonan Institute of Technology 1-1-25 Tsujido-nishikaigan Fujisawa 251-8511 Japan Development Planning Department Mitsubishi Automotive Engineering Co. Ltd. 1 Nakashinkiri Hashime-cho Okazaki -444-8501 Japan Okazakilst System Department MMC Computer Research Ltd. 1 Nakashinkiri Hashime-cho Okazaki 444-8501 Japan Digital Technology Dept. Mitsubishi Motors Corp. Hashime-cho Okazaki 444-8501 Japan Dept. of Complex Systems Science Nagoya University Chigusa-ku Nagoya 464-8601 Japan

Plate and shell structures are widelyused in industrial products and structures such as automotives, vessels and architectures for its good formability and lightweight property. This paper presents a numerical shape optimization method for the rigidity design of plate and shell structures. A solution to a compliance minimization problem subject to a volume constraint is proposed, and its reciprocal problem is also solved. The boundaries are assumed to be movable in the in -plane directions so as to keep the initial curvatures in the design domain. For simplicity, the structures to be optimized are discretized by plane elements based on the Mindlin-Reissner plate theory. The problems are formulated as non-parametric, or distributed shape optimization problems involving the design of free boundaries. The shape gradient functions are theoretically derived using the material derivative method and the Lagrange multiplier method. With the shape gradient function, the smooth domain variation that minimizes the objective functional is de termined by the traction method developed by the authors. The validity and practical utility of this numerical solution for the rigidity design of plate and shell structures are verified through simple examples and applications to automotive components.

关键词： Shell A Solution to Shape Optimization Problems for the Rigidity design of Plate and Shell Structures Shape

来源：评论

学校读者我要写书评

暂无评论

A Novel and Simple X‐Ray Dark Field Imaging

引用

AIP Conference Proceedings 2004年第1期705卷 1247-1250页

作者： E. Hashimoto H. Sugiyama A. Maksimenko K. Hyodo T. Yuasa W. Pattanasiriwisawa E. Rubenstein Joseph Roberson M. Ando 1Department of Photon‐Science Graduate University for Advanced Science (GUAS) Shonan International Village Kanagawa 240‐0193JAPAN 2Photon Factory High Energy Accelerator Research Organization (KEK) Oho 1‐1 Tsukuba Ibaraki 305‐0801 JAPAN 3Department of Life System Engineering Faculty of Engineering Yamagata Universiy Jonan 4‐316 Yonezawa Yamagata 992‐8510 JAPAN 4Department of Physics Suranaree University of Technology Muang District University Avenue 1111 Nakhon Rachasima 30000 Thailand 5Department of Medicine Stanford University School of Medicine Stanford CA 94305 6California Ear Institute at Stanford Stanford CA 94304 7Department of Material Structure Science GUAS Oho 1‐1 Tsukuba Ibaraki 305‐0801 JAPAN

A novel and simple X ray optics ‘Owl’ capable of dark field imaging due to refraction contrast is under developement. That comprises a Bragg case asymmetric monochromator ‘M’ and an analyzer ‘A’ in a double crystal arrangement. ‘A’ has thickness of N × L, where N means integer and L the extinction distance in the Laue case or has a thickness that should provide reasonable transmittant X‐ray intensity in the Bragg case. The analyzer can only select the refracted light from object towards the forward diffraction direction, while completely suppresses the intensity toward the diffraction direction at the just Bragg position. Their angular width of diffraction was 0.3 μrad at X‐ray energy of 35keV. The spatial resolution available is at the order of 5μm or better. This method has a large potential of application to material science, biology and clinical medicine. Pictures shown as demonstration of dark field imaging is a ceramics with hexagonal outer size of 5 mm, containing 91 holes with diameter of 300μm and human auditory ossicles excised.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Free Communication Abstracts

引用

Sleep and Biological Rhythms 2005年第S1期3卷 A44-A73页

作者： Prashan T. Kaul Jasonm Passafiume Bruce F. O’Hara Ramalingam Vetrivelan Hruda Nanda Mallick Velayadhan Mohan Kumar G.-X. Zhan F. Serrano P. Fenik R. Hsu L. Kong D. Pratico E. Klann S. C. Veasey Ambika Prasad K. Mahapatra Velayudhan Mohan Kumar Tomoyuki Kuwaki Ben-Shiang Den Akira Nakamura Wei Zhang Masashi Yanagisawa Yasuichiro Fukuda Monica L. Andersen Sergio Tufik Isabela B. Antunes Juliana C. Perry S. Tufik M. L. Andersen M. C. Batista M. B. Calzavara J. L. Costa Frussa-Filho F. Désarnaud E. Murillo-Rodriguez D. Gerashchenko S. Shiromani L. Lin S. Nishino E. Mignot P. J. Shiromani Carlos Blanco-Centurion Priyattam J. Shiromani L. Ling M. Xu C. Blanco-Centurion Härmä Mikko Sallinen Mikael Shamini Jain Paul J. Mills Lianqi Liu Sonia Ancoli-Israel I. Haimov N. Breznitz S. Shiloh R. Silvestri I. Aricò G. Mento A. Gagliano T. Calarese C. di Perri R. Epstein O. Tzischinsky R. Naveh P. Herer G. Pillar H. Adami P. Lavie Gerald A. Marks Oren Sachs Christian C. Birabil Rachida Roky Brahim Benaji Majda Taoudi Benchekroun Florian Chapotot Alain Buguet Uma Rao Russell E. Poland K. Puvanendran Yumiko Mishima Kazuo Mishima Satoshi Hozumi Tetsuo Shimizu Yasuo Hishikawa Juan C. Toledo Yoshimasa Koyama Yukihiko Kayama Hiroshi Iwasaki Akihiro Kawauchi Tsuneharo Miki Hironobu Yaegashi Yasuro Takahashi Yuichi Inoue Daiki Ishiura Keisuke Yamamoto Mitsuyuki Nakao Norihito Katayama Mitsuaki Yamamoto Yasuhiro Matsumoto Kohtoku Satoh Takuma Tozawa Leon Lack Toby Bramwell Helen Wright Michael Gradisar P. Storrs F. Mckenna K. Hume Alexander A. Loshkarev Elena I. Rodionova Ekaterina V. Levichkina Ivan N. Pigarev Joseph de Koninck Rama Maganti Amit Biswas Lyudmila I. Kiyashchenko Boris Y. Mileykovskiy Jerome M. Siegel Melvi Methippara Sunil Kumar Noor Alam Ronald Szymusiak Dennis Mcginty Heidi L. Richardson Peter M. Parslow Adrian M. Walker Richard Harding Rosemary S. C. Horne O. Tzchishinsky T. Shochat A. Nictren T. Portnoy R. Peled Richard Bootzin S. Aparicio C. Garau R. V. Rial M. C. Nicolau M. Rivero S. Esteban M. C. Barriga H. E. Kuen University of Kentucky Lexington USA All India Institute of Medical Sciences New Delhi India Department of Physiology All India Institute of Medical Sciences New Delhi India Departmet of Physiology All India Institute of Medical Sciences New Delhi India Center for Sleep and Respiratory Neurobiology and Department of Medicine University of Pennsylvania School of Medicine Philadelphia USA Department of Molecular Physiology and Biophysics Baylor College of Medicine Houston USA Center for Experimental Therapeutics Department of Pharmacology University of Pennsylvania School of Medicine Philadelphia USA Departments of Molecular & Integrative Physiology Topeka USA Autonomic Physiology Chiba University Graduate School of Medicine Chiba Japan Department of Molecular Genetics University of Texas SWMC Dallas USA Universidade Federal de São Paulo-UNIFESP Sao Paulo Brazil West Roxbury VA/Harvard Medical School Boston USA VA Medical Center & Harvard Medical School West Roxbury Brockton USA Stanford University Palo Alto USA Stanford University Center for Narcolepsy Palo Alto USA West Roxbury VA and Harvard Medical School Boston USA Brain@Work Research Center Finnish Institute of Occupational Health Helsinki Finland University of California San Diego USA Department of Psychiatry University of California San Diego USA San Diego Veterans Affairs Healthcare System La Jolla USA Department of Behavioral Science Emek Yezreel Academic College Nazareth Israel Department of Psychology Tel Aviv University Tel Aviv Israel Sleep Medicine Center Messina Medical School Messina Italy Pediatric Neurology and Psychiaty Messina Medical School Messina Italy Sleep Laboratory Faculty of Medicine Technion Haifa Israel Emek Yezreel Academic College Emek Yezreel Afula Israel Director of Nursing Rambam Medical Center Haifa Israel Department of Psychiatry University of Texas South-western Medical Center Dallas USA Department of Biology Faculty of Sciences Ain Chock University

来源：评论

学校读者我要写书评

暂无评论

Observation of emissions from CdSe single quantum dots and spatial mapping by micro-cathodoluminescence measurement

引用

physica status solidi c 2004年第4期1卷

作者： J. Saraie N. Matsumura R. Sugie M. Yoshikawa Department of Electronics and Information Science Faculty of Engineering and Design Kyoto Institute of Technology Matsugasaki Sakyo-ku Kyoto 606-8585 Japan Toray Research Center Inc. Sonoyama 3-3-7 Otsu 520-8567 Japan

Single quantum dots (QD) luminescence from MBE-grown CdSe/ZnSe QD was observed by micro-cathodoluminescence measurement. The scanning area of the exciting electron beam was decreased from 100 × 100 μm 2 to 0.2 × 0.2 μm 2 . A broad emission was observed till an area of 2 × 2 μm 2 , and sharp emission lines were clear at a scanning area of 1 × 1 μm 2 or less. The spatial resolution of this measurement was determined to be 0.45 μm from the number of sharp lines and the QD density. The luminescence intensity mapping was performed at arbitrarily selected wavelengths, and QD existence was clearly shown at different positions at each wavelength. Thus, the luminescence observation of the CdSe single QD and its mapping were successfully performed by micro-cathodoluminescence measurement for the first time. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

关键词： 78.60.Hk 78.67.Hc 81.07.Ta

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：