全文获取类型
收费全文 | 285篇 |
免费 | 0篇 |
国内免费 | 3篇 |
专业分类
化学工业 | 20篇 |
金属工艺 | 1篇 |
机械仪表 | 13篇 |
建筑科学 | 5篇 |
能源动力 | 1篇 |
轻工业 | 44篇 |
水利工程 | 95篇 |
石油天然气 | 3篇 |
无线电 | 9篇 |
一般工业技术 | 84篇 |
冶金工业 | 3篇 |
原子能技术 | 1篇 |
自动化技术 | 9篇 |
出版年
2022年 | 1篇 |
2020年 | 2篇 |
2017年 | 1篇 |
2012年 | 34篇 |
2011年 | 33篇 |
2010年 | 5篇 |
2009年 | 2篇 |
2008年 | 15篇 |
2007年 | 20篇 |
2006年 | 11篇 |
2005年 | 16篇 |
2004年 | 14篇 |
2003年 | 12篇 |
2002年 | 10篇 |
2001年 | 11篇 |
2000年 | 9篇 |
1999年 | 5篇 |
1998年 | 2篇 |
1997年 | 3篇 |
1996年 | 4篇 |
1995年 | 16篇 |
1994年 | 6篇 |
1993年 | 12篇 |
1992年 | 11篇 |
1991年 | 10篇 |
1990年 | 13篇 |
1989年 | 7篇 |
1980年 | 1篇 |
1979年 | 1篇 |
1978年 | 1篇 |
排序方式: 共有288条查询结果,搜索用时 78 毫秒
1.
介绍了马尔马里克河土坝滑坡的成因,对滑坡进行了分析研究。强调了进行监测对于预测滑坡的重要性。 相似文献
2.
扎戈尔抽水蓄能电站施工经验B.M.普洛特尼科夫A.A.贝卡多罗夫主题词札戈尔抽水蓄能电站,施工技术,施工组织设计,运行可靠性扎戈尔抽水蓄能电站是俄罗新第一座大型新式蓄能电站,其设汁装机容曾为120万k\V(已装机80万kw)。前苏联水工建筑设汁院在技... 相似文献
3.
4.
5.
6.
水工建筑物金属构件表面防锈处理方法[俄]B·C·阿尔图宁等主题词水工建筑物,金属材料,防腐蚀,方法,电磁效应,计算方法水工建筑物各种构件通常都是在锈蚀和磨损的条件下运行。采用特种材料,如高强钢材经济上又不合算,因此,使用廉价的金属防锈层较为适宜。除常... 相似文献
7.
Wang JW Wu HN Li HX 《IEEE transactions on systems, man, and cybernetics. Part B, Cybernetics》2012,42(3):927-938
In this paper, a distributed fuzzy control design based on Proportional-spatial Derivative (P-sD) is proposed for the exponential stabilization of a class of nonlinear spatially distributed systems described by parabolic partial differential equations (PDEs). Initially, a Takagi-Sugeno (T-S) fuzzy parabolic PDE model is proposed to accurately represent the nonlinear parabolic PDE system. Then, based on the T-S fuzzy PDE model, a novel distributed fuzzy P-sD state feedback controller is developed by combining the PDE theory and the Lyapunov technique, such that the closed-loop PDE system is exponentially stable with a given decay rate. The sufficient condition on the existence of an exponentially stabilizing fuzzy controller is given in terms of a set of spatial differential linear matrix inequalities (SDLMIs). A recursive algorithm based on the finite-difference approximation and the linear matrix inequality (LMI) techniques is also provided to solve these SDLMIs. Finally, the developed design methodology is successfully applied to the feedback control of the Fitz-Hugh-Nagumo equation. 相似文献
8.
氩放电检测器(Argon Discharge Detector)是一种用氩气做载气的气相色谱仪专用检测器,因其具有独特的检测能力,在氩气检测领域应用较为广泛。采用AGC仪器公司生产的Nova CHROM2000搭载氩放电检测器(ADD)气相色谱仪,对该检测器的检测能力进行评测。 相似文献
9.
Pedersoli E Capotondi F Cocco D Zangrando M Kaulich B Menk RH Locatelli A Mentes TO Spezzani C Sandrin G Bacescu DM Kiskinova M Bajt S Barthelmess M Barty A Schulz J Gumprecht L Chapman HN Nelson AJ Frank M Pivovaroff MJ Woods BW Bogan MJ Hajdu J 《The Review of scientific instruments》2011,82(4):043711
We present a compact modular apparatus with a flexible design that will be operated at the DiProI beamline of the Fermi@Elettra free electron laser (FEL) for performing static and time-resolved coherent diffraction imaging experiments, taking advantage of the full coherence and variable polarization of the short seeded FEL pulses. The apparatus has been assembled and the potential of the experimental setup is demonstrated by commissioning tests with coherent synchrotron radiation. This multipurpose experimental station will be open to general users after installation at the Fermi@Elettra free electron laser in 2011. 相似文献
10.
A review on biological control and metabolism of aflatoxin 总被引:17,自引:0,他引:17
The series of events that led to the discovery of aflatoxin as a potent carcinogen, its biosynthesis, mechanism of action, structure-function relationship provide interesting insight into the economical and technological factors involved in the development of an effective control measure for the toxin. Scientists all over the world are making continuous efforts to explore a generalized process of detoxification, which can bring down the toxin content in heterogenous commodities to a threshold level. In this article biological control methods with special emphasis on in vivo and in vitro enzymatic detoxification of aflatoxin have been reviewed. Future areas of research involving large-scale enzymatic detoxification and modified atmosphere storage are also discussed. 相似文献