全文获取类型
收费全文 | 735篇 |
免费 | 5篇 |
专业分类
电工技术 | 15篇 |
综合类 | 2篇 |
化学工业 | 154篇 |
金属工艺 | 67篇 |
机械仪表 | 38篇 |
建筑科学 | 10篇 |
矿业工程 | 6篇 |
能源动力 | 4篇 |
轻工业 | 10篇 |
水利工程 | 13篇 |
石油天然气 | 21篇 |
无线电 | 33篇 |
一般工业技术 | 171篇 |
冶金工业 | 78篇 |
原子能技术 | 91篇 |
自动化技术 | 27篇 |
出版年
2022年 | 11篇 |
2021年 | 28篇 |
2020年 | 12篇 |
2019年 | 14篇 |
2018年 | 21篇 |
2017年 | 19篇 |
2016年 | 22篇 |
2015年 | 12篇 |
2014年 | 22篇 |
2013年 | 19篇 |
2012年 | 29篇 |
2011年 | 28篇 |
2010年 | 19篇 |
2009年 | 19篇 |
2008年 | 18篇 |
2007年 | 28篇 |
2006年 | 21篇 |
2005年 | 17篇 |
2004年 | 16篇 |
2003年 | 10篇 |
2002年 | 14篇 |
2001年 | 13篇 |
2000年 | 13篇 |
1999年 | 7篇 |
1998年 | 8篇 |
1997年 | 9篇 |
1996年 | 22篇 |
1995年 | 10篇 |
1994年 | 15篇 |
1992年 | 11篇 |
1991年 | 14篇 |
1990年 | 6篇 |
1989年 | 7篇 |
1988年 | 17篇 |
1987年 | 11篇 |
1985年 | 7篇 |
1984年 | 12篇 |
1983年 | 7篇 |
1982年 | 10篇 |
1981年 | 12篇 |
1980年 | 11篇 |
1978年 | 9篇 |
1977年 | 10篇 |
1976年 | 14篇 |
1975年 | 10篇 |
1974年 | 16篇 |
1973年 | 9篇 |
1972年 | 10篇 |
1967年 | 4篇 |
1965年 | 4篇 |
排序方式: 共有740条查询结果,搜索用时 375 毫秒
1.
Kozhitov L. V. Kiselev B. G. Raykova T. B. Popkova A. V. Kostishin V. G. Muratov D. G. Yakushko E. V. Kosushkin V. G. Bebenin V. G. 《Russian Microelectronics》2019,48(8):599-612
Russian Microelectronics - The recently developed nanomaterials and their production technologies as intellectual property objects (IPOs) are considered. The role of the informational-analytical... 相似文献
2.
Conclusions This comparison of two ways of making99Mo shows that there is good scope for making it in any area. If there is a thermal reactor having a high flux, one can make99Mo from98Mo, and in that case, even irradiation in a high flux makes it favorable to use highly enriched98Mo and unblocked targets, which raises the specific activity and thus increases the working life in the99mTc generator.If there is a thermal reactor with low flux or if there is a fast reactor it is best to make99Mo from uranium fission products. The target can be highly enriched235U, which if necessary can be reused, or low-enriched uranium.There are no essential constraints on making99Mo, and the production is mainly based on technological tasks.Translated from Atomnaya Énergiya, Vol. 67, No. 2, pp. 104–108, August, 1989. 相似文献
3.
4.
FL Kiselev 《Canadian Metallurgical Quarterly》1997,42(6):248-251
The migration of substances from rubber packaging materials into drug products can be significant with certain packaging materials in contact with organic solvent systems. Recommendations for testing drug products for leachables are continually evolving to address new developments. Testing packaging materials using simulated solvents is not always an acceptable protocol for the pharmaceutical industry. We describe a rational strategy for evaluation of the drug product for packaging extractables. A profile of the extractables from rubber packaging materials was made with a range of organic solvents and stress conditions to provide information on substances to target in the drug product. The drug product was evaluated to determine if the matrix would cause interferences that might inhibit detection of the found extractables. Analytical methods were selected based on these findings. The procedures were validated according to FDA guidelines. A stability program using time and storage conditions as variables provided information for acceptance criteria. This same strategy can be used on other types of pharmaceuticals and packaging materials. 相似文献
5.
A. S. Gerasimov G. V. Kiselev L. A. Myrtsymova T. S. Zaritskaya 《Nuclear Engineering and Design》2004,230(1-3):327-331
Characteristics of process of transmutation of neptunium, americium and curium from spent nuclear fuel in heavy-water reactor during first 10 lifetimes and at transition to equilibrium mode are calculated. During transmutation, dangerous nuclides, first of all, 244Cm and 238Pu are accumulated. They cause an increase of radiotoxicity. At first 10 cycles of transmutation, the radiotoxicity is increased by 8.7 times in comparison with radiotoxicity of initial load of transmuted actinides. Heavy-water reactor with thermal power of 1000 MW can transmute neptunium, americium and curium extracted from 3.7 VVER-1000 type reactors. It means, that the required power of transmutation reactor makes about 8% of thermal power of VVER-1000 type reactors. 相似文献
6.
L. A. Borzenkov A. T. Kalashnikov O. I. Kiselev A. N. Ryapolov M. B. Semun'kin Yu. L. Uvarovskii 《Journal of Mining Science》1992,27(5):434-438
Research Institute of Kursk Magnetic Anomaly and Polytechnical Institute, Lebedin Mining and Concentration Plant, Gubkin. Mining Institute, Moscow. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 5, pp. 67-71, September-October, 1991. 相似文献
7.
Stekloplastik—Sertifikat Corporation Moscow. Translated from Khimicheskie Volokna, No. 2, pp. 58–59, March–April, 1994. 相似文献
8.
Results of a study are reported on the utilization of ground vulcanizate, which is a waste product of rubber prcoessing plants. Loaded stocks of various commercial rubbers act as objects for the study. Talc, kaolin, silicon dioxide, and furnace carbon black are used as fillers. According to the results of a study on the effect of the amount of rubber crumb, an increase in the content of unmodified crumb leads to a decrease in tear resistance that is associated with poor wettability. To increase wettability, we use organosilicon couplings. It is shown that the addition of vulcanizate to rubber stocks, together with highly dispersed fillers treated with organosilicon couplings, leads to a significant increase in tear resistance and makes it possible to significantly reduce the cost of production and utilization. 相似文献
9.
V. F. Chirikhin Yu. N. Tuluevskii V. G. Mizin A. D. Kiselev V. B. Beizerov V. G. Milyuts 《Metallurgist》1988,32(3):114-116
Orsk-Khalilovo Metallurgical Combine. Scientific-Research Institute of Metallurgy. Translated from Metallurg, No. 3, pp. 43–45, March, 1988. 相似文献
10.
On the basis of the isomorphism of critical phenomena, the behavior of transport properties of binary mixtures in the vicinity of the vapor-liquid critical line is considered. In particular, the renormalization of the singularity of the thermal conductivity in dilute critical solutions has been analyzed in detail. It is shown that the behavior of the thermal conductivity is determined by the critical background, i.e., the fluctuation-induced regular part, which diverges at the critical point of a solvent. 相似文献