全文获取类型
收费全文 | 789篇 |
免费 | 0篇 |
专业分类
电工技术 | 1篇 |
化学工业 | 45篇 |
金属工艺 | 11篇 |
机械仪表 | 8篇 |
建筑科学 | 3篇 |
矿业工程 | 2篇 |
水利工程 | 2篇 |
石油天然气 | 56篇 |
无线电 | 15篇 |
一般工业技术 | 60篇 |
冶金工业 | 537篇 |
原子能技术 | 41篇 |
自动化技术 | 8篇 |
出版年
2018年 | 4篇 |
2017年 | 7篇 |
2016年 | 13篇 |
2014年 | 6篇 |
2013年 | 6篇 |
2012年 | 5篇 |
2011年 | 17篇 |
2010年 | 13篇 |
2009年 | 4篇 |
2008年 | 6篇 |
2007年 | 3篇 |
2005年 | 3篇 |
2003年 | 5篇 |
1999年 | 7篇 |
1998年 | 131篇 |
1997年 | 83篇 |
1996年 | 66篇 |
1995年 | 31篇 |
1994年 | 38篇 |
1993年 | 28篇 |
1991年 | 11篇 |
1990年 | 9篇 |
1989年 | 12篇 |
1988年 | 10篇 |
1987年 | 9篇 |
1986年 | 9篇 |
1985年 | 10篇 |
1984年 | 5篇 |
1983年 | 3篇 |
1982年 | 15篇 |
1981年 | 12篇 |
1980年 | 10篇 |
1979年 | 6篇 |
1978年 | 8篇 |
1977年 | 36篇 |
1976年 | 64篇 |
1975年 | 7篇 |
1974年 | 3篇 |
1973年 | 3篇 |
1972年 | 10篇 |
1971年 | 8篇 |
1969年 | 5篇 |
1968年 | 5篇 |
1967年 | 6篇 |
1966年 | 6篇 |
1965年 | 6篇 |
1964年 | 7篇 |
1962年 | 2篇 |
1961年 | 2篇 |
1956年 | 2篇 |
排序方式: 共有789条查询结果,搜索用时 9 毫秒
1.
2.
SV Varha OH Reznikov IS Turchyn VM Demchenko OP Potikha PV Sinitsyn LV Tarasenko LV Cha?kovs'ka 《Canadian Metallurgical Quarterly》1994,40(5-6):105-109
The effect exerted by transplantation of the 5 day culture of testicles from newly born piglets on the hypogonadal state of mature X-ray irradiated (3 Gy) rats was studied. It has been found that a month after transplantation (two months after irradiation) the hypogonadal state disappeared for a while, which is confirmed by normalization of the weight of seminal vesicles, content of testosterone and biologically active lutropine, restoration of the reproductive function of rats. No significant changes in steroidogenesis activity have been found, which proves a substituent character of transplantation. The effect disappears three months later but certain restoration of the content of nucleic acids in the testicles is observed. 相似文献
3.
V. N. Kostyukov A. P. Naumenko V. A. Starikov A. A. Sinitsyn A. M. Volkov A. S. Rubanenko A. V. Rykin O. V. Kuznetsov 《Metallurgist》2007,51(11-12):596-604
Introduction of the BER? KOMPAKS® automated system at the Vyksa Metallurgical Plant to safely and efficiently manage the operation of the plant’s equipment has allowed the facility to begin operating that equipment based on real-time evaluations of its actual physical condition. Introduction of the new system has also allowed better coordination of repair-scheduling with ongoing production operations, significantly improved the reliability and readiness of the equipment for operation at 100% capacity, completely eliminated the human factor from the process of monitoring the condition of equipment, and made it possible to check the quality and timeliness of equipment maintenance and repair work so as to ensure safe, efficient operation of the entire production complex. 相似文献
4.
5.
This article examines the design of the exact readout system of a digital angle transducer in which the possible quasi-sinusoidality
of the angle sensor and the simplification of the conversion unit are automatically compensated for by additional devices
so as to not significantly affect the accuracy with which angular position is converted into code.
Translated from Izmeritel'naya Tekhnika, No. 5, pp. 26–27, May, 1996. 相似文献
6.
7.
8.
9.
The Shack-Hartmann wave-front sensor offers many theoretical advantages over other methods for measuring aberrations of the eye; therefore it is essential that its accuracy be thoroughly tested. We assessed the accuracy of a Shack-Hartmann sensor by directly comparing its measured wave-front aberration function with that obtained by the Smirnov psychophysical method for the same eyes. Wave-front profiles measured by the two methods agreed closely in terms of shape and magnitude with rms differences of approximately lambda/2 and approximately lambda/6 (5.6-mm pupil) for two eyes. Primary spherical aberration was dominant in these profiles, and, in one subject, secondary coma was opposite in sign to primary coma, thereby canceling its effect. Discovery of an unusual, subtle wave-front anomaly in one individual further demonstrated the accuracy and sensitivity of the Shack-Hartmann wave-front sensor for measuring the optical quality of the human eye. 相似文献
10.