全文获取类型
收费全文 | 183篇 |
免费 | 3篇 |
专业分类
电工技术 | 14篇 |
化学工业 | 44篇 |
金属工艺 | 13篇 |
机械仪表 | 8篇 |
能源动力 | 4篇 |
轻工业 | 24篇 |
水利工程 | 2篇 |
无线电 | 15篇 |
一般工业技术 | 24篇 |
冶金工业 | 30篇 |
原子能技术 | 3篇 |
自动化技术 | 5篇 |
出版年
2023年 | 1篇 |
2019年 | 3篇 |
2018年 | 1篇 |
2017年 | 1篇 |
2016年 | 5篇 |
2014年 | 3篇 |
2013年 | 3篇 |
2012年 | 4篇 |
2011年 | 7篇 |
2010年 | 4篇 |
2009年 | 6篇 |
2008年 | 4篇 |
2007年 | 8篇 |
2006年 | 11篇 |
2005年 | 4篇 |
2004年 | 6篇 |
2003年 | 5篇 |
2002年 | 6篇 |
2001年 | 9篇 |
2000年 | 9篇 |
1999年 | 9篇 |
1998年 | 19篇 |
1997年 | 7篇 |
1996年 | 7篇 |
1995年 | 5篇 |
1994年 | 2篇 |
1993年 | 7篇 |
1992年 | 3篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1989年 | 2篇 |
1988年 | 2篇 |
1985年 | 1篇 |
1984年 | 2篇 |
1983年 | 2篇 |
1982年 | 1篇 |
1981年 | 4篇 |
1980年 | 1篇 |
1979年 | 1篇 |
1978年 | 4篇 |
1977年 | 1篇 |
1976年 | 3篇 |
1974年 | 1篇 |
排序方式: 共有186条查询结果,搜索用时 0 毫秒
101.
Classification and characterization of Japanese consumers' beef preferences by external preference mapping 下载免费PDF全文
Keisuke Sasaki Motoki Ooi Naoto Nagura Michiyo Motoyama Takumi Narita Mika Oe Ikuyo Nakajima Tatsuro Hagi Koichi Ojima Miho Kobayashi Masaru Nomura Susumu Muroya Takeshi Hayashi Kyoko Akama Akira Fujikawa Hironao Hokiyama Kuniyuki Kobayashi Takanori Nishimura 《Journal of the science of food and agriculture》2017,97(10):3453-3462
102.
Fukue M Yanai M Sato Y Fujikawa T Furukawa Y Tani S 《Journal of hazardous materials》2006,136(1):111-119
The contamination of sediments can be evaluated from comparison of the current concentration with the estimated background value. Although it is known that grain size affects background concentrations, there have been difficulties in evaluating this effect. The specific surface area of sediments, which can be calculated from the grain size distribution, is introduced as a property index for correlation of background values. The results show that for sandy-to-sandy silt sediments, the background values of metals are expressed in terms of fines content, which can be correlated with the corresponding specific surface area. However, for silty clay or clayey silt sediments, which would have a high metal retention capacity, the level of the background may be constrained by the relatively low concentrations of metals in seawater. Finally, background levels of Zn, Cu and Pb are presented. 相似文献
103.
Akihide Saimoto Masaki Fujikawa Chobin Makabe Taisuke Yamanaka Muhammed Sohel Rana 《Engineering Failure Analysis》2010,17(4):838-847
The values of stress intensity factors of unsymmetrical cracks initiated from hole edges under tension were calculated in a center-holed plate, that is a plate having a hole in the center of a front face. The correction factor for stress intensity in the case of the holed plate with cracks was compared with that of a center-cracked plate whose crack length was equal to the total of the hole diameter and the lengths of the cracks in the case of the holed plate. In the present study, to understand the variation of the stress intensity factor, counterplots of the stress intensity factor KI and the correction factor FI are employed. Also, the variation of ratio RF of correction factors between the holed plate with crack and the center-cracked plate were investigated. Where non-dimensional hole diameter a/W is smaller than 0.2, the ratio RF is less than 1.1 after crack growth length c/W reaches 0.1. Where, 2a, 2c and 2W are hole diameter, the growth length of the crack from hole edge, and plate width, respectively. Therefore, the stress intensity factor for cracks initiated from a holed plate can be approximated within 10% error to that of a center-cracked plate where a/W is smaller than 0.2, though the unsymmetrical cracks are initiated from the edges. Where a/W is larger than 0.3, RF becomes larger than 1.1 in the wide range of c/W. 相似文献
104.
Toshihiko Tanaka Shinji Fujikawa Shigeyuki Funabiki 《Electrical Engineering in Japan》2003,144(2):53-62
This paper proposes a new method of damping harmonic resonance in the DC link of a large‐capacity rectifier‐inverter system, such as in rapid‐transit railways. A voltage‐source PWM converter is connected in series to the DC capacitor of the rectifier through a matching transformer, acting as a damping resistor to the DC capacitor current. No filters are needed to extract harmonic components from the DC capacitor current. This results in a quick response and highly stable damping. The relationship between the control gain of the PWM converter and the required rating is theoretically discussed. We show that the required rating is less than one‐thousandth of that previously proposed. In particular, regenerating the power consumed by the PWM converter is very important because of the large power in practical systems. Normally, an additional PWM inverter is connected to the DC bus of the PWM converter to regenerate the consumed power. The additional inverter regenerates the DC power to the AC source through a transformer. This method, however, makes the damping circuit complex, thus the proposed method for the DC‐link harmonic resonance is less practicable. In this paper, a simple and novel scheme that utilizes the DC‐link voltage of the rectifier as a DC source for the PWM converter is proposed. The excellent practicability of the proposed damping method with the novel regenerating scheme is confirmed using digital computer simulation. © 2003 Wiley Periodicals, Inc. Electr Eng Jpn, 144(2): 53–62, 2003; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.10172 相似文献
105.
Akiko Katayama-Aramata Hiroshi Nakajima Keikichi Fujikawa Hideaki Kita 《Electrochimica acta》1983,28(6):777-780
The electrochemical characteristics of a platinum electrode directly bonded to one side of a solid polymer electrolyte membrane (Pt-SPE) were studied. Current-potential relations of hydrogen and oxygen adsorbed on Pt-SPE were observed to be similar to those on a platinum metal electrode independently of the presence/absence of electrolytic solution at the platinum side of Pt-SPE. Hydrogen evolution, hydrogen ionisation, and oxygen reduction were examined at the condition that the side at the platinum of Pt-SPE was free from liquid but filled with the gases concerned 相似文献
106.
107.
Katsuhiro Fujikawa 《Microprocessors and Microsystems》1981,5(8):351-356
The application of the microcomputer to various industrial machinery or equipment is expanding. The sewing industry is no exception to this trend, positively employing microcomputers for more advanced automation, labour saving and further industrialization. To satisfy recent needs, a sewing machine motor equipped with eddy current variable-speed clutch, LIMI-STOP Z, was developed. The LIMI-STOP Z features, besides a friction-free low inertial clutch used instead of the conventional friction type clutch, the use of a 4-bit microcomputer in the control system. This paper describes the principle, composition and functions of the LIMI-STOP Z. 相似文献
108.
High voltage power transistors were produced using epitaxially grown Si wafers which contain many stacking faults in base region. The reverse biased characteristics of the emitter-base and the base-collector junctions of these transistors showed “soft” breakdown under a sufficiently high reverse bias. A detailed analysis of the effect by stacking faults was carried out with a scanning electron microscope (SEM). It was observed that the junctions of the transistors are not uniform by the stacking faults. 相似文献
109.
110.
Kazuo Yayoi Masahiko Jinno Rintaro Fujikawa Alexander Baryshev Alexander Khanikaev Kwang‐Ho Shin Hironaga Uchida Mitsuteru Inoue 《IEEJ Transactions on Electrical and Electronic Engineering》2007,2(4):463-467
We fabricated porous alumina templates with a well‐ordered pore array by a pre‐triggered anodization method. The arrangement of pores in the fabricated templates was set by a Ni‐dot stamper. The structure of the templates was analyzed by field emission scanning electron microscopy (FESEM), two‐dimensional Fourier transformation of FESEM images and optical means. It was found that the porous alumina templates have a high‐quality, extended, two‐dimensional hexagonal lattice, which can be used in the fabrication of two‐dimensional magnetophotonic crystals (2D‐MPCs). © 2007 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc. 相似文献