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排序方式: 共有59条查询结果,搜索用时 15 毫秒
1.
Hidemitsu Hojo Wataru Toyoshima Masayasu Tamura Noriyuki Kawamura 《Polymer Engineering and Science》1974,14(9):604-609
Particulate-filled thermosetting composites are widely used, yet little systematic work has been done on their long-term strength characteristics. In this study short-term tensile, flexural, and impact tests as well as tensile creep-rupture tests were made for unfilled and filled epoxy to clarify the effects of filler size, filler content, and temperature. Fillers used were silica, alumina particles, and glass beads. Test temperatures were varied from 25 to 110°C. As a result of short-term testing, it was found that the Petch relation held between strength and filler size if brittle fracture occurred, while a strength and filler size if brittle fracture occurred, while a strengthening effect existed when ductile fracture occurred. On creeprupture testing, a strengthening is observed with filler size and content for silica and glass beads. The Arrhenius plot of rupture time for various filler sizes and contents converges to a characteristic point corresponding to the glass transition temperature of the material. Using this relation, a modified Larson-Miller master rupture curve is proposed which can predict the long-term strength of particulate-filled thermosetting composites as functions of rupture time, temperature, filler size, and content. 相似文献
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3.
Mitsuhiro Shikida Tatsuaki Sugito Mina Okochi Hiroyuki Honda 《Microsystem Technologies》2014,20(2):315-323
Reaction performance of a droplet-based biochemical assay technique that uses magnetic wires as sample carriers is evaluated. Wires 2.0 mm in length, 0.05 mm in width, and 0.02 mm in thickness are fabricated by chemical etching, introduced into a droplet immersed in oil, and manipulated by the magnetic force of a moving magnet. Alkaline-phosphatase as an enzyme is immobilized on the wire surfaces by applying Au and self-assembled monolayer coatings, and the method’s on-chip reaction performance is evaluated. The enzymatic reaction is found to increase linearly as the number of wires and the reaction time increase. Relatively high performance reproducibility for enzymatic reactions is obtained; on average, the reaction absorbance, standard deviation, and coefficient of variance are found to be respectively 1.14, 0.103, and 9.1 %. The conductivity change in a fused droplet is used to evaluate the absolute volume of liquid transferred with the extracted wires and a value of 0.33 μl is obtained. 相似文献
4.
Md Sazzadur Rahman MD Nahin Islam Shiblee Kumkum Ahmed Ajit Khosla Jun Ogawa Masaru Kawakami Hidemitsu Furukawa 《大分子材料与工程》2020,305(9)
In this work, 3D printable gel polymer electrolytes (GPEs) based on N,N‐dimethylacrylamide (DMAAm) and polyvinylidene fluoride (PVDF) in lithium chloride containing ethylene glycol solution are synthesized and their physicochemical properties are investigated. 3D printing is carried out with a customized stereolithography type 3D gel printer named “Soft and Wet Intelligent Matter‐Easy Realizer” and free forming GPE samples having variable shapes and sizes are obtained. Printed PVDF/PDMAAm‐based GPEs exhibit tunable mechanical properties and favorable thermal stability. Electrochemical proprieties of the printed GPEs are carried out via impedance spectroscopy in the temperature range of 25–90 °C by varying PVDF content. Ionic conductivity as high as 6.5 × 10?4 S cm?1 is achieved at room temperature for GPE containing low PVDF content (5 wt%) and conductivity of the GPEs is increased as temperature rises. 相似文献
5.
Fuminori Adachi Takashi Washio Atsushi Fujimoto Hiroshi Motoda Hidemitsu Hanafusa 《New Generation Computing》2005,23(4):291-313
The needs of efficient and flexible information retrieval on multi-structural data stored in database and network are significantly
growing. Especially, its flexibility plays one of the key roles to acquire relevant information desired by users in retrieval
process. However, most of the existing approaches are dedicated to a single content and data structure respectively, e.g.,
relational database and natural text. In this work, we propose “Multi-Structure Information Retrieval” (MSIR) approach applicable
to various types of contents and data structures by adapting a small part of the approach to data structures. The power of
this approach comes from the use of the invariant feature information obtained from byte patterns in the files through some
mathematical transformation. The experimental evaluation of the proposed approach for both artificial and real data indicates
its high feasibility.
Fuminori Adachi: He received his Master of engineering from Osaka University in ’03. He is enrolled in the doctoral course of Osaka University
from ’03. His current research interest includes scientific discovery, data mining and machine learning techniques.
Takashi Washio, Ph.D.: He received his Ph.D. from Tohoku University in ’88. In ’88, he became a visiting reseacher in Massachusetts Institute of
Technology. In ’90, he joined Mitsubishi Research Institute Inc., and is working for Osaka University from ’96. His current
research interest includes scientific discovery, data mining and machine learning techniques.
Atsushi Fujimoto: He is enrolled in the master cource of Osaka University from ’03. His Current research interest includes correlation analysis,
data mining and machine learning techniques.
Hiroshi Motoda, Ph.D.: He received his Ph.D. from University of Tokyo in ’72. In ’67, he joined Hitachi Ltd. and has been working for Osaka University
since ’96. His current research interest includes scientific discovery, data mining and machine learning.
Hidemitsu Hanafusa: He received Master of Engineering from Keio University in ’83. In ’83, he joined The Kansai Electric Power Co. Ins. (KEPCO).
He researched on Maintenance Support System at INSS from ’97 to ’02. Now, he is working in KEPCO. 相似文献
6.
Influence of the methyl group on the dielectric constant of boron carbon nitride films containing it
Hidemitsu Aoki Takuro Masuzumi Makoto Hara Zhiming Lu Daisuke Watanebe Chiharu Kimura Takashi Sugino 《Diamond and Related Materials》2010,19(12):1437-1440
LSI interconnect insulators made using low dielectric constant (low-k) materials are required for high performance devices with a small RC delay. We investigated a boron carbon nitride film containing the methyl group (Me–BCN) using tris-di-methyl-amino-boron (TMAB: B[N(CH3)2]3) gas as a low-k material. In addition, we studied the influence of the methyl group on the dielectric constant (k-value) and the properties of the Me–BCN films. It was found that the k-value of the Me–BCN films decreases with increasing number of C–H bonds due to the methyl group (CH3). The number of O–H bonds due to water incorporation is suppressed by increasing the number of C–H bonds. Consequently, we suggested that a lower k-value can be realized by the suppression of water invasion by a hydrophobic surface due to methyl bonds. Thus, the control of the methyl group is important to achieve a low-k material using Me–BCN films. 相似文献
7.
Kazutoshi Ohyama Takashi Sugino Tomohiro Nitta Chiharu Kimura Hidemitsu Aoki 《Electrical Engineering in Japan》2011,174(4):45-50
We have attempted to develop high‐performance and safe fuel cells by using ammonium formate as a solid (powder) fuel. This solid fuel has the potential of safer transportability than liquid fuels such as methanol from the viewpoint of toxicity and flammability. In order to make use of some of the advantages of ammonium formate, we investigated the oxidation characteristics of ammonium formate with respect to a Pt electrode. Cyclic voltammograms indicate that ammonium formate has high oxidation activity with respect to a Pt electrode. We have also found that the oxidation of ammonium formate can be improved by the addition of Ir to Pt catalysts. It is highly likely that ammonium formate will be useful as a solid (powder) fuel for polymer electrolyte membrane (PEM) fuel cells. This new fuel will promote the development of safe fuel cells for PEM. © 2010 Wiley Periodicals, Inc. Electr Eng Jpn, 174(4): 45–50, 2011; Published online in Wiley Online Library ( wileyonlinelibrary.com ). DOI 10.1002/eej.21043 相似文献
8.
Hidemitsu Aoki Kazuki Miyano Daisaku Yano Kazuhiko Sano Koji Yamanaka Chiharu Kimura Takashi Sugino 《Polymer Engineering and Science》2007,47(10):1666-1670
Biological and chemical sensor with a rapid response in microlevel test is required for health and environmental monitor. A novel sensing due to porous ion exchanger with three-dimensional acceptor has been first attempted to develop a high-performance sensor. This porous monolith type ion exchanger has an open-cellular monolith structure with 5–50-μm diameter pores. The trace amount of inorganic ions dissolved in aqueous solutions can be quantitatively determined with the impedance given by the monolith, which attracts and adsorbs the ions rapidly. We have succeeded in detecting ions with a concentration as low as 10−7 mol. The porous ion exchanger has a potentiality as a high-performance device for biological and chemical sensing. POLYM. ENG. SCI., 47:1666–1670, 2007. © 2007 Society of Plastics Engineers 相似文献
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10.
Chiharu Kimura Hiroshi Sota Hidemitsu Aoki Takashi Sugino 《Diamond and Related Materials》2009,18(2-3):478-481
Boron carbon nitride (BCN) films are synthesized by remote plasma-assisted chemical vapor deposition (RPCVD) method. The present experimental apparatus is featured by introducing BCl3 gas near the substrate without mixing to plasma consisting of N2 and CH4 gases. Two sample groups of the BCN films are prepared. One is grown with various CH4 flow rates, and another is grown with various BCl3 flow rates. The composition ratio of the constituent atoms, atomic bonds and optical bandgap are investigated. C composition ratio of the BCN film increases with increasing CH4 flow rate, leading to a reduction in the optical bandgap with increasing C composition ratio. On the other hand, it is found that no significant variation in the composition ratio occurs for the BCN films grown with various BCl3 flow rates and that the optical bandgap decreases with increasing BCl3 flow rate. This behavior of the optical bandgap is related to a change of the atomic bonds in the BCN film grown with various BCl3 flow rates. 相似文献