全文获取类型
收费全文 | 604篇 |
免费 | 26篇 |
专业分类
电工技术 | 31篇 |
综合类 | 3篇 |
化学工业 | 190篇 |
金属工艺 | 14篇 |
机械仪表 | 24篇 |
建筑科学 | 12篇 |
能源动力 | 19篇 |
轻工业 | 59篇 |
水利工程 | 1篇 |
石油天然气 | 1篇 |
无线电 | 52篇 |
一般工业技术 | 112篇 |
冶金工业 | 17篇 |
原子能技术 | 20篇 |
自动化技术 | 75篇 |
出版年
2023年 | 12篇 |
2022年 | 23篇 |
2021年 | 26篇 |
2020年 | 12篇 |
2019年 | 18篇 |
2018年 | 20篇 |
2017年 | 14篇 |
2016年 | 19篇 |
2015年 | 10篇 |
2014年 | 26篇 |
2013年 | 44篇 |
2012年 | 31篇 |
2011年 | 54篇 |
2010年 | 31篇 |
2009年 | 19篇 |
2008年 | 24篇 |
2007年 | 24篇 |
2006年 | 19篇 |
2005年 | 11篇 |
2004年 | 13篇 |
2003年 | 13篇 |
2002年 | 13篇 |
2001年 | 14篇 |
2000年 | 12篇 |
1999年 | 6篇 |
1998年 | 14篇 |
1997年 | 6篇 |
1996年 | 10篇 |
1995年 | 10篇 |
1994年 | 2篇 |
1993年 | 3篇 |
1992年 | 7篇 |
1991年 | 10篇 |
1990年 | 5篇 |
1989年 | 6篇 |
1988年 | 5篇 |
1987年 | 2篇 |
1985年 | 2篇 |
1984年 | 2篇 |
1983年 | 2篇 |
1982年 | 4篇 |
1981年 | 3篇 |
1980年 | 5篇 |
1979年 | 3篇 |
1978年 | 3篇 |
1977年 | 4篇 |
1976年 | 3篇 |
1975年 | 2篇 |
1973年 | 2篇 |
1972年 | 4篇 |
排序方式: 共有630条查询结果,搜索用时 15 毫秒
1.
Ishiguro A. Furuhashi T. Okuma S. Uchikawa Y. 《Industrial Electronics, IEEE Transactions on》1992,39(6):565-570
A neural network controller for trajectory control of robotic manipulators that is used not to internalize the inverse dynamic model of the controlled object but to compensate only the uncertainties of the robotic manipulator is presented. Its performance is compared with that of the conventional adaptive scheme. The results show the ability of the neural network controller to adapt to unstructured effects. A learning method for the neural network compensator with true teaching signals is shown. The tracking error of the robotic manipulator was greatly reduced when this controller was used 相似文献
2.
Two types of jet cement having different retarders were investigated. Both physical properties such as mechanical strength, pore size distribution and porosity and chemical processes of hydration such as rate of hydration and the kind of hydrate produced upon hardening of jet cement are strongly affected by the method of the regulation of setting. The difference between the mechanical strength developed is discussed. 相似文献
3.
Conductive Papers Containing Metallized Polyester Fibers for Electromagnetic Interference Shielding 总被引:7,自引:0,他引:7
Conductive papers were developed for preventing or reducing electromagnetic interference (EMI), and their shielding efficiency was evaluated. This type of conductive paper consists of wood pulp, synthetic pulp and metallized polyester fibers (0.5–2.0 mm long and 14 m in diameter) whose surfaces are coated with nickel alone (Ni-PET) or copper and nickel double layers (Ni-Cu-PET) by electroless plating. In this report, the effect of the characteristics of these metallized fibers, such as their conductivity, geometry and the concentration of fibers in paper, which lead to high efficiency for shielding effectiveness is discussed. For instance, one of the conductive papers (80 g/m2) which was prepared by mixing 40% Ni-Cu-PET and 60% synthetic polyethylene pulp showed over 40 dB shielding effectiveness between 10 MHz and 1 GHz. 相似文献
4.
Styrene was grafted onto cellulose acetate p-nitrobenzoate (CANB) by chain transfer reaction of growing polymer radicals to the pendant nitro groups of CANB. A copolymer with a branch for every 17.2 nitro groups was obtained. This result indicates that the pendant aromatic nitro group is more effective in obtaining a graft copolymer by radical mechanism than pendant double bond on the trunk polymer previously reported, where graft copolymers with a branch for several hundred of double bonds are produced. 相似文献
5.
6.
7.
New pixel driving circuit using self‐discharging compensation method for high‐resolution OLED micro displays on a silicon backplane 下载免费PDF全文
Kei Kimura Yusuke Onoyama Taizo Tanaka Naobumi Toyomura Hideyuki Kitagawa 《Journal of the Society for Information Display》2017,25(3):167-176
A new 4T2C pixel circuit formed on a silicon substrate is proposed to realize a high‐resolution 7.8‐μm pixel pitch AMOLED microdisplay. In order to achieve high luminance uniformity, the pixel circuit compensates its Vth variation of the MOSFET for the driving transistor internally by using self‐discharging method. Also presented are 0.5‐in Quad‐VGA and 1.25‐in wide Quad‐XGA microdisplays with the proposed pixel circuit. 相似文献
8.
We developed a dual-probe (DP) atomic force microscopy (AFM) system that has two independently controlled probes. The deflection of each cantilever is measured by the optical beam deflection (OBD) method. In order to keep a large space over the two probes for an objective lens with a large numerical aperture, we employed the OBD sensors with obliquely incident laser beams. In this paper, we describe the details of our developed DP-AFM system, including analysis of the sensitivity of the OBD sensor for detection of the cantilever deflection. We also describe a method to eliminate the crosstalk caused by the vertical translation of the cantilever. In addition, we demonstrate simultaneous topographic imaging of a test sample by the two probes and surface potential measurement on an α-sexithiophene (α-6T) thin film by one probe while electrical charges were injected by the other probe. 相似文献
9.
10.
Zhao Yan Yu Han Liying Lin Ying Xue Chao Ma Wai Kit Ng Kam Sing Wong Kei May Lau 《光:科学与应用(英文版)》2021,(11):2143-2152
The deployment of photonic integrated circuits (PICs) necessitates an integration platform that is scalable, high-throughput, cost-effective, and power-efficien... 相似文献