全文获取类型
收费全文 | 840篇 |
免费 | 46篇 |
国内免费 | 10篇 |
专业分类
电工技术 | 10篇 |
综合类 | 1篇 |
化学工业 | 215篇 |
金属工艺 | 10篇 |
机械仪表 | 14篇 |
建筑科学 | 14篇 |
矿业工程 | 1篇 |
能源动力 | 40篇 |
轻工业 | 75篇 |
水利工程 | 6篇 |
石油天然气 | 1篇 |
无线电 | 126篇 |
一般工业技术 | 190篇 |
冶金工业 | 27篇 |
原子能技术 | 6篇 |
自动化技术 | 160篇 |
出版年
2024年 | 3篇 |
2023年 | 12篇 |
2022年 | 35篇 |
2021年 | 53篇 |
2020年 | 45篇 |
2019年 | 50篇 |
2018年 | 51篇 |
2017年 | 45篇 |
2016年 | 37篇 |
2015年 | 28篇 |
2014年 | 38篇 |
2013年 | 72篇 |
2012年 | 52篇 |
2011年 | 77篇 |
2010年 | 40篇 |
2009年 | 38篇 |
2008年 | 37篇 |
2007年 | 34篇 |
2006年 | 22篇 |
2005年 | 19篇 |
2004年 | 11篇 |
2003年 | 13篇 |
2002年 | 12篇 |
2001年 | 5篇 |
2000年 | 9篇 |
1999年 | 3篇 |
1998年 | 6篇 |
1997年 | 4篇 |
1996年 | 7篇 |
1995年 | 4篇 |
1994年 | 3篇 |
1993年 | 7篇 |
1992年 | 8篇 |
1991年 | 8篇 |
1990年 | 1篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1985年 | 2篇 |
1946年 | 1篇 |
1936年 | 1篇 |
排序方式: 共有896条查询结果,搜索用时 15 毫秒
891.
Pandey Saurabh Kumar Nitesh Handa Anand Shukla Sandeep Kumar 《International Journal of Information Security》2023,22(6):1743-1763
International Journal of Information Security - For malware detection, the commonly known technique used by many commercial antivirus engines is signature-based methods. However, researchers have... 相似文献
892.
Mark Friedell Sandeep Kochhar Mark Vincent Lapolla Joe Marks 《Computer Animation and Virtual Worlds》1992,3(4):201-218
We present a unifying view of visualization in which comprehensive support for software, algorithm, process and application (including scientific) visualizations is treated as an essential component of the computing environment. We describe our recent work toward making this view a reality: a tool for computer-assisted design of visualizations and a technique for monitoring a computational process in a non-invasive fashion. 相似文献
893.
Dharmesh Tewari V. B. Chaturvedi Narayan Dutta Sandeep Kr. Chaudhary 《European Journal of Lipid Science and Technology》2023,125(8):2200150
Two experiments are conducted to find out the effect of rice bran crude lecithin on rumen ecology, milk fat quality, metabolic indices, and leptin (LEP) gene expression. In first experiment, 12 crossbred calves are randomly divided into two groups, that is, RBCL-0 and RBCL-6, and they are fed wheat straw based diet with concentrate mixture containing 0% RBCL (CM1) and 6% RBCL (CM2), respectively, for 120 d for rumen fermentation study. Ruminal ammonia-N and short chain fatty acids and rumen microbes are nonsignificantly affected in RBCL calves. In second experiment, 12 lactating cows are randomly divided into RBCL-0 and RBCL-6 groups and fed CM1 and CM2 concentrate along with napier grass as roughage. In milk fatty acid profile, C16:1 fatty acid is significantly lower while cis-C18:1 is significantly higher in the RBCL supplemented cows. The atherogenic index and thrombogenic index are 16 and 19% lower while health promoting index, polyunsaturated saturated fatty acids, and hypocholesterolaemic/hypercholesterolaemic are 16, 10, and 16, respectively, higher in RBCL-6 cows. The mean nonesterified fatty acid and β-hydroxy butyric acid value is lower while LEP gene expression is higher in RBCL supplemented cows than control cows. The milk income is higher in RBCL cows. Finally, it can be concluded that RBCL at 6% in concentrate mixture of dairy ration do not adversely affect the rumen ecology. Although RBCL has capacity to enhance health properties of milk fat along with profitability, still more studies are warranted. Practical applications: Cow milk has always been an important component of the human diet in the world. The milk composition, especially fat, is directly influenced by feeding regime in dairy animals. In the milk fat, the unsaturated fatty acids (mainly polyunsaturated fatty acids) help in improving the health condition of consumers along with the keeping quality of milk. In this series, rice bran crude lecithin was used in the dairy ration and found that it altered certain metabolic parameters and gene expression, which may be beneficial for animal health without altering rumen fermentation. Although RBCL substantially modify the milk fatty acid profile and improves the fat indices which will enhance the human health by protecting them from cardiovascular diseases. 相似文献
894.
A xanthine oxidase was immobilized covalently onto chitosan bound gold coated iron nanoparticles (CHIT/Fe-NPs@Au) electrodeposited on the surface of pencil graphite electrode (PGE). A xanthine biosensor was fabricated using XOD/CHIT/Fe-NPs@Au/PGE as working, Ag/AgCl as reference and Pt as auxiliary electrode connected through potentiostat. The enzyme electrode was characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy and electrochemical impedance spectroscopy (EIS). The biosensor exhibited optimum current response within 3 s at pH 7.4, 35 °C and working range 0.1–300 μM, when polarized at 0.5 V vs Ag/AgCl. The sensitivity of the biosensor was 0.001169 mAμ M–1 cm–2 with detection limit of 0.1 μM (S/N = 3). The biosensor showed only 25% loss in its initial activity after its 100 uses over 100 days, when stored at 4 °C. 相似文献
895.
Shantanu Sen Dr. Rafat Ali Akanksha Onkar Prof. Dr. Subramaniam Ganesh Prof. Dr. Sandeep Verma 《Chembiochem : a European journal of chemical biology》2022,23(11):e202100678
The discovery of insulin came with very high hopes for diabetic patients. In 2021, the world celebrated the 100th anniversary of the discovery of this vital hormone. However, external use of insulin is highly affected by its aggregating tendency that occurs during its manufacturing, transportation, and improper handling which ultimately leads to its pharmaceutically and biologically ineffective form. In this review, we aim to discuss the various approaches used for decelerating insulin aggregation which results in the enhancement of its overall structural stability and usage. The approaches that are discussed are broadly classified as either a measure through excipient additions or by intrinsic modifications in the insulin native structure. 相似文献
896.
Sandeep Verma Nese Orbey Robert W. Birkmire T. W. Fraser Russell 《Progress in Photovoltaics: Research and Applications》1996,4(5):341-353
A chemical reaction analysis of the selenization of copper indium layers to form copper indium diselenide is presented. Time-progressive selenization reactions were carried out in a laminar flow tubular reactor in a dilute H2Se atmosphere at 400°C. Copper, indium and copper-indium thin films were reacted for 1–60 min. The reacted films are analyzed by x-ray diffraction and atomic absorption spectrophotometry to identify the chemical species present in the reacted films. A reaction network for film formation is proposed and data from time-progressive selenizations were analyzed to obtain species composition profiles. Rate expressions are postulated and a mathematical model for the selenization is developed. The behavior of the model is compared with the experimentally determined species compositions to obtain specific reaction rate constants. 相似文献