全文获取类型
收费全文 | 216篇 |
免费 | 7篇 |
国内免费 | 1篇 |
专业分类
电工技术 | 1篇 |
综合类 | 1篇 |
化学工业 | 44篇 |
机械仪表 | 16篇 |
建筑科学 | 2篇 |
能源动力 | 1篇 |
轻工业 | 17篇 |
水利工程 | 15篇 |
无线电 | 28篇 |
一般工业技术 | 36篇 |
冶金工业 | 25篇 |
自动化技术 | 38篇 |
出版年
2022年 | 3篇 |
2021年 | 5篇 |
2020年 | 1篇 |
2019年 | 2篇 |
2018年 | 2篇 |
2016年 | 9篇 |
2015年 | 5篇 |
2014年 | 5篇 |
2013年 | 22篇 |
2012年 | 8篇 |
2011年 | 15篇 |
2010年 | 6篇 |
2009年 | 14篇 |
2008年 | 8篇 |
2007年 | 8篇 |
2006年 | 9篇 |
2005年 | 5篇 |
2004年 | 6篇 |
2003年 | 10篇 |
2002年 | 5篇 |
2001年 | 3篇 |
2000年 | 7篇 |
1999年 | 8篇 |
1998年 | 11篇 |
1997年 | 4篇 |
1996年 | 6篇 |
1995年 | 4篇 |
1994年 | 2篇 |
1993年 | 7篇 |
1992年 | 9篇 |
1991年 | 2篇 |
1990年 | 3篇 |
1989年 | 2篇 |
1988年 | 1篇 |
1984年 | 1篇 |
1981年 | 2篇 |
1979年 | 1篇 |
1978年 | 1篇 |
1976年 | 1篇 |
1973年 | 1篇 |
排序方式: 共有224条查询结果,搜索用时 15 毫秒
101.
102.
It is well known that bias-temperature stressing of MOS devices produces increased interface state densities and insulator
fixed charges, thus limiting the high temperature applications of these devices. Nitrided oxides have previously been reported
to offer increased resistance to interface state generation and insulator charge buildup in ionizing radiation and room temperature
hot electron stress, but under some nitridation conditions are known to suffer from problems which include a low field bias
temperature instability. We will report that reoxidized nitrided oxides can offer increased resistance to both bias-temperature
stress-induced interface state generation and insulator charge buildup compared with the original oxides. 相似文献
103.
Wei-Chong Tsai Chia-Pao Lin Lihwiuan Shiau Shuh-Der Pan 《Journal of the American Oil Chemists' Society》1978,55(10):695-698
An accurate, reliable, and simple method was described for the determination of Pb, Cu, Cd, Mn, Zn, an d Fe in edible oils
by atomic absorption spectrophotometry following burning of the sample in a restricted air supply. Recoveries for the six
heavy metals by the proposed methods were about 100%. The relative standard deviation of the analysis for the lead at the
level of 0.074 ppm was 6%, and the copper at the levels of 0.064 ppm and 0.158 ppm were 7% and 2%, respectively. The recovery
of lead was found to be suppressed by the presence of a large quantity of iron in the oil, but the suppression was alleviated
by adding a Mg(NO3)2 solution to the charred residue before ashing. 相似文献
104.
105.
The dilute solution properties of a cationic polyelectrolyte, poly(dimethyl sulfate quaternized dimethylaminoethyl methacrylate) [poly(DMAEM · C2H6SO4)], are studied by measurements of intrinsic viscosity, degree of binding, and flocculation application. The intrinsic viscosity of this polyelectrolyte is related to the type and concentration of added salt. The intrinsic viscosity behavior for cationic polyelectrolyte resulting from the electrostatic repulsive force of the polymer chain is contrasted with polyampholyte. The polyelectrolyte in the presence of KCl has a lower degree of binding, indicating that the proton ion (H+) is relatively difficult to bind to the CH3SO4? at the polymer end. The polymerization of DMAEM · C2H6SO4 in 0.5M KCl aqueous solution proceeded more easily than that of DMAEM · C2H6SO4 in pure water. The polymerization rate of DMAEM · C2H6SO4 is found to pass through an extreme value as a function of pH. Optimum flocculation, corresponding to the complete removal of turbidity in the supernatant, is achieved. Beyond the optimum flocculation, high polymer dosages redisperse the bentonite suspensions. 相似文献
106.
Le‐Chung Shiau 《Canadian Metallurgical Quarterly》1993,6(3):284-298
The effect of delamination on the flutter boundary of two‐dimensional laminated plates are investigated theoretically. Linear‐plate theory and qusai‐steady aerodynamic theory are employed. A simple beam‐plate‐theory model is developed to predict the flutter boundaries of delaminated homogeneous plates with simply supported ends. The effects of delamination position, size, and thickness on the flutter boundary are studied in detail. The results reveal that the presence of a delamination degraded the stiffness and the natural frequencies of the plate and thereby decreases the flutter boundary of the plate. However, for certain geometries the flutter boundaries were raised due to the flutter coalescence modes of the plate altered by the presence of a delamination in the plate. 相似文献
107.
Professor C. M. Wu B. C. Jiang Y. R. Shiau 《The International Journal of Advanced Manufacturing Technology》1993,8(4):216-226
In order to fully utilise the power of robots in factories, robot process capability (RPC) must be considered and improved. To improve the RPC in on-line processing by applying robot learning, the counterpropagation network was modified in this research. With two layers, the counterpropagation network was modified to control a robot's gross and fine motions. For the first layer, the network serves as a sensor-signal generator to control the gross motion. For the second layer, the network serves as a fine motion adjuster. Also, each layer can be separated functionally. By controlling both the gross and the fine motions, the RPC can then be improved. The modified two-layer counterpropagation network control scheme was validated by computer simulation and physical implementation on a RS-2200 robot system. 相似文献
108.
109.
110.
This study investigates factors that affect consumer continuous use intention toward online group buying and the degree that reciprocity and reputation of social exchange, trust, and vendor creativity affect consumer satisfaction and intention toward online purchasing. Data from 215 valid samples was obtained using an online survey. The research model is assessed using partial least squares (PLS) analysis. The results show that the intention to engage in online group buying is predicted collectively by consumer satisfaction, trust, and seller creativity. Consumer satisfaction with online group buying is predicted primarily by trust, followed by consumer reciprocity. The proposed research model explains 67.7% of variance for satisfaction and 39.7% of variance for intention to engage in online group buying. The results suggest that reciprocity, trust, satisfaction, and seller creativity provide considerable explanatory power for intention to engage in online group buying behavior. 相似文献