全文获取类型
收费全文 | 73篇 |
免费 | 6篇 |
国内免费 | 3篇 |
专业分类
电工技术 | 9篇 |
综合类 | 2篇 |
化学工业 | 12篇 |
金属工艺 | 9篇 |
机械仪表 | 2篇 |
建筑科学 | 4篇 |
能源动力 | 1篇 |
轻工业 | 12篇 |
无线电 | 1篇 |
一般工业技术 | 22篇 |
冶金工业 | 4篇 |
原子能技术 | 3篇 |
自动化技术 | 1篇 |
出版年
2022年 | 2篇 |
2021年 | 1篇 |
2018年 | 2篇 |
2017年 | 1篇 |
2016年 | 1篇 |
2014年 | 3篇 |
2013年 | 7篇 |
2012年 | 3篇 |
2011年 | 4篇 |
2010年 | 6篇 |
2009年 | 6篇 |
2008年 | 5篇 |
2007年 | 7篇 |
2006年 | 2篇 |
2005年 | 2篇 |
2004年 | 1篇 |
2003年 | 5篇 |
2002年 | 1篇 |
1999年 | 1篇 |
1998年 | 1篇 |
1997年 | 4篇 |
1996年 | 1篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1990年 | 4篇 |
1988年 | 1篇 |
1987年 | 3篇 |
1986年 | 1篇 |
1983年 | 2篇 |
1982年 | 1篇 |
排序方式: 共有82条查询结果,搜索用时 15 毫秒
1.
研究开发适应于国际标准的SPM针尖特性表征结构 总被引:1,自引:1,他引:0
标准化是当前扫描探针显微镜领域(SPM)的一项重要工作.国际标准化组织ISO自2004年起已经将SPM标准化列入其工作框架之内,并建立了相关的分委员会、技术委员会和工作小组.本文介绍了国际上当前有关SPM标准化方面努力和主要趋势:SPM术语的标准化被认为是SPM标准化工作范围内首先需要考虑的问题,其相关标准即将发表;SPM数据管理及处理的标准化则是另一项正在进行的有利于数据访问、处理和共享的重要工作.可溯源计量型原子力显微镜(AFM)的发展解决了纳米尺度的度量问题,能够通过对标准物质进行定量分析与定标实现量值的传递.当前发展能够被计量型AFM鉴定的参考物质以及标准化仪器校正过程是实现SPM标准化之前的当务之急.为了促进SPM领域ISO标准的实现,一种新的针尖特性表征结构(tip characterizer)已经被开发出来.这种tip characterizer由超晶格组装技术实现,能够描述针尖的形状并且同时进行侧向尺度的校正.本文探讨了这种新型tip characterizer的性能.这种tip characterizer不易损坏针尖,具有很好的重复性,并能帮助实验观察分析针尖形状和结构几何特性之间的关系. 相似文献
2.
Tatsuo Tabaru Jin-Hak Kim Kazuhisa Shobu Michiru Sakamoto Hisatoshi Hirai Shuji Hanada 《Metallurgical and Materials Transactions A》2005,36(3):617-626
Mo(Si,Al)2-base oxidation-resistant coatings for Nb-base structural materials have been studied. The coating is composed of a Mo(Si,Al)2-base Al reservoir and Al2O3 interlayer to suppress interface reactions between the Al reservoir and the substrate. To develop a suitable Al-reservoir
material, some Mo(Si0.6,Al0.4)2-HfB2 composites were prepared. Their oxidation resistance and coefficients of thermal expansion were investigated, in addition
to their chemical reactivity with the Nb substrate at high temperatures. As a result, Mo(Si0.6,Al0.4)2-20 vol pct HfB2 was selected as one of the satisfactory Al reservoirs. The introduction of a stable Al2O3 interlayer was attempted using a novel powder metallurgical process to overlay the Nb substrates with the Al reservoir, where
the Nb substrates were subjected to a slight surface oxidation prior to the coating process. The Nb specimens, which are thoroughly
coated with the Al reservoir and Al2O3 interlayer, can be successfully fabricated by this method. The coated Nb specimens are not damaged at all after prolonged
exposure in flowing Ar-20 pct O2 at 1673 K for 120 hours. Furthermore, the Al2O3 interlayer is very effective and no reactions occur at the interface. Thus, this Mo(Si,Al)2-base oxidation-resistant coating is applicable to Nb. The utility of the coating system is also confirmed for a NbSS/Nb5Si3 composite.
This article is based on a presentation made in the symposium entitled “Beyond Nickel-Base Superalloys,” which took place
March 14–18, 2004, at the TMS Spring meeting in Charlotte, NC, under the auspices of the SMD-Corrosion and Environmental Effects
Committee, the SMD-High Temperature Alloys Committee, the SMD-Mechanical Behavior of Materials Committee, and the SMD-Refractory
Metals Committee. 相似文献
3.
The dimer and trimer obtained by the pyrolysis of poly(p-chlorostyrene) were 2,4-di(p-chlorophenyl)-1-butene and 2,4,6-tri(p-chlorophenyl)-1-hexene, respectively, while those obtained by the cationic oligomerization of p-chlorostyrene were trans-1,3-di(p-chlorophenyl)-1-butene and a diastereomeric pair of trans-1,3,5-tri-(p-chlorophenyl)-1-hexene. 相似文献
4.
Kunihiko Hidaka Hisatoshi Ikeda 《IEEJ Transactions on Electrical and Electronic Engineering》2009,4(1):58-61
A world economy expands over boundaries between countries and regions. In Japan, there are many splendid technologies which the world requires. In order to transfer these technologies to the world an international standard which includes them as a standard is necessary. Activities by which 1100 kV UHV technologies are standardized in the IEC standard were conducted by starting with discussions in IEC/SB1. The activity has been followed by IEC/JICCG which coordinates IEC and CIGRE activities. The horizontal standards were started in advance at TC 8 and TC 28. The equipment standards will start from 2009 after the CIGRE committee finishes their reports by the end of 2008. Activities by the IEEJ standard committee have been carried horizontally to proceed with the UHV standardization rapidly and efficiently. Copyright © 2009 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc. 相似文献
5.
Song Chen Toshiyuki Ikoma Nobuhiro Ogawa Satoshi Migita Hisatoshi Kobayashi Nobutaka Hanagata 《Science and Technology of Advanced Materials》2010,11(3)
Novel type I collagen hybrid fibrils were fabricated by neutralizing a mixture of type I fish scale collagen solution and type I porcine collagen solution with a phosphate buffer saline at 28 °C. Their structure was discussed in terms of the volume ratio of fish/porcine collagen solution. Scanning electron and atomic force micrographs showed that the diameter of collagen fibrils derived from the collagen mixture was larger than those derived from each collagen, and all resultant fibrils exhibited a typical D-periodic unit of ∼67 nm, irrespective of volume ratio of both collagens. Differential scanning calorimetry revealed only one endothermic peak for the fibrils derived from collagen mixture or from each collagen solution, indicating that the resultant collagen fibrils were hybrids of type I fish scale collagen and type I porcine collagen. 相似文献
6.
TAKAO MUKAI NAOFUMI WATANABE TAKAHIRO TOBA TAKATOSHI ITOH SUSUMU ADACHI 《Journal of food science》1991,56(4):1017-1018
A water soluble polysaccharide “kefiran” produced by Lactobacillus kefiranofaciens was examined for its gel-forming and rheological properties. Kefiran (3%) formed gel in the presence of ethanol (4–10%). The gel strength in 8% ethanol was comparable to that of 3% gelatin gel in water. Addition of casein (3%) increased gel strength 1.5–2.0 fold. The unique properties of kefiran may make it a useful food additive. 相似文献
7.
8.
Dohiko Terada Hisatoshi Kobayashi Kun Zhang Ashutosh Tiwari Chiaki Yoshikawa Nobutaka Hanagata 《Science and Technology of Advanced Materials》2012,13(1)
The processing of a polyelectrolyte (whose functionality is derived from its ionized functional groups) into a nanofiber may improve its functionality and yield multiple functionalities. However, the electrospinning of nanofibers from polyelectrolytes is imperfect because polyelectrolytes differ considerably from neutral polymers in their rheological properties. In our study, we attempt to solve this problem by applying a voltage of opposite polarity to charges on a polyelectrolyte. The application of this ‘countervoltage’ can temporarily mask or screen a specific rheological property of the polyelectrolyte, making it behave as a neutral polymer. This approach can significantly contribute to the development of new functional nanofiber materials. 相似文献
9.
Yoshinori Horii Mitsuhiro Ikawa Koichi Sakaguchi Masayuki Chikamatsu Yuji Yoshida Reiko Azumi Hiroshi Mogi Masahiko Kitagawa Hisatoshi Konishi Kiyoshi Yase 《Thin solid films》2009,518(2):642-3524
We have investigated self-assembled monolayer (SAM) treatment on SiO2 gate insulator of poly(3-hexylthiophene) (P3HT) thin-film transistor (TFT), and demonstrated a correlation between mobility and surface free energy of the insulator. The device with lower surface free energy shows higher mobility. The docosyltrichlorosilane (DCTS)-treated device exhibits the best performance among the various SAM-treated devices examined. Field-effect mobility, on/off ratio and threshold voltage of the DCTS-treated P3HT TFT were 0.015 cm2/Vs, >105 and −14 V, respectively. 相似文献
10.