首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   450篇
  免费   19篇
  国内免费   4篇
电工技术   1篇
化学工业   88篇
金属工艺   12篇
机械仪表   7篇
建筑科学   7篇
能源动力   17篇
轻工业   49篇
水利工程   2篇
石油天然气   1篇
无线电   57篇
一般工业技术   96篇
冶金工业   49篇
自动化技术   87篇
  2023年   3篇
  2022年   7篇
  2021年   26篇
  2020年   18篇
  2019年   9篇
  2018年   23篇
  2017年   12篇
  2016年   18篇
  2015年   10篇
  2014年   9篇
  2013年   21篇
  2012年   20篇
  2011年   19篇
  2010年   15篇
  2009年   17篇
  2008年   14篇
  2007年   16篇
  2006年   12篇
  2005年   7篇
  2004年   11篇
  2003年   13篇
  2002年   8篇
  2001年   8篇
  2000年   3篇
  1999年   4篇
  1998年   12篇
  1997年   16篇
  1996年   9篇
  1995年   5篇
  1994年   5篇
  1993年   13篇
  1992年   6篇
  1991年   7篇
  1990年   4篇
  1989年   5篇
  1988年   3篇
  1987年   5篇
  1986年   7篇
  1985年   9篇
  1984年   2篇
  1983年   3篇
  1982年   4篇
  1981年   3篇
  1980年   7篇
  1979年   2篇
  1977年   6篇
  1976年   3篇
  1975年   4篇
  1973年   2篇
  1972年   4篇
排序方式: 共有473条查询结果,搜索用时 15 毫秒
1.

Floods are common and recurring natural hazards which damages is the destruction for society. Several regions of the world with different climatic conditions face the challenge of floods in different magnitudes. Here we estimate flood susceptibility based on Analytical neural network (ANN), Deep learning neural network (DLNN) and Deep boost (DB) algorithm approach. We also attempt to estimate the future rainfall scenario, using the General circulation model (GCM) with its ensemble. The Representative concentration pathway (RCP) scenario is employed for estimating the future rainfall in more an authentic way. The validation of all models was done with considering different indices and the results show that the DB model is most optimal as compared to the other models. According to the DB model, the spatial coverage of very low, low, moderate, high and very high flood prone region is 68.20%, 9.48%, 5.64%, 7.34% and 9.33% respectively. The approach and results in this research would be beneficial to take the decision in managing this natural hazard in a more efficient way.

  相似文献   
2.
In continuation to my previous work (Guha S. AIChE J. 2013;59(4):1390-1399), in this work, effects of ionic migration are evaluated for disk region of a rotating ring disk electrode system by numerically solving complex differential equations, developed for mass transfer along with kinetic complication in presence of ionic migration under limiting current condition. The system for simulation is 0.01 M Fe2(SO4)3 solution with H2SO4 as supporting electrolyte. Simulation cases are presence and absence of ionic migration with kinetic complication (oxidation of Fe2+ to Fe3+ under O2 pressure). Results show that concentration boundary layer thickness of reactant Fe3+ reduces appreciably and steady-state disk current reduces substantially in presence of migration. Simulated steady-state disk current in absence of migration case agrees well with published data. Results indicate higher Fe2+ concentration in presence of migration and thereby higher rate of oxidation of Fe2+ to Fe3+ at all rate constant values.  相似文献   
3.
4.
Maity  Reshmi  Maity  N. P.  Guha  K.  Baishya  S. 《Microsystem Technologies》2021,27(2):515-523
Microsystem Technologies - This paper explained the dependency of collapse voltage on semiconductor device structural features (membrane diameter, membrane thickness and the vertical distance...  相似文献   
5.
6.
Microsystem Technologies - This paper presents a critical analysis of the meta-heuristic techniques used in various researches on the optimisation of photovoltaic (PV) parameters, which involves...  相似文献   
7.
Microsystem Technologies - Modern-day biomedical science and technology have progressed with implantable neural recording systems. There is a demand for miniaturised devices that can be emplaced...  相似文献   
8.
Homologues long‐chain chrysin derivatives (LCD, C n: 8–18) were synthesized and incorporated into nanostructured lipid carriers (NLC) with the aim to treat human neuroblastoma. Mutual miscibility and attractive interactions among the NLC components, namely tripalmitin (TP), cetyl palmitate (CP), oleic acid (OA), and the chrysin (CHR) derivatives (LCD) at the air–water interface were assessed by the Langmuir monolayer approach. Optimum combination for the NLC formulations was found to be 2:2:1 (M/M/M) for TP/CP/OA, respectively. NLC formulations, both in the absence and presence of LCD, were characterized by combined dynamic light scattering, electron microscopy, atomic force microscopy, and differential scanning calorimetry. The size and zeta potential of the NLC formulations were found in the range 200–350 nm and ?12 to ?18 mV, respectively. Encapsulation efficiency and release kinetics of CHR and LCD when loaded into NLC were also evaluated. LCD exhibited maximum incorporation, drug‐loading capacity, and sustained release because of its enhanced hydrophobicity. Superior incorporation efficiency and sustained‐release profile of LCD were able to enhance their anticancer activity against human neuroblastoma cell lines, compared to CHR, making them promising agents in combating cancer.  相似文献   
9.
Pattern Analysis and Applications - Decomposition and representation of electrical circuit drawings to a suitable vector form has widespread applications related to data compression, storage,...  相似文献   
10.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号