全文获取类型
收费全文 | 727篇 |
免费 | 0篇 |
专业分类
电工技术 | 3篇 |
化学工业 | 109篇 |
金属工艺 | 7篇 |
机械仪表 | 17篇 |
建筑科学 | 3篇 |
矿业工程 | 4篇 |
轻工业 | 1篇 |
水利工程 | 3篇 |
石油天然气 | 20篇 |
无线电 | 15篇 |
一般工业技术 | 46篇 |
冶金工业 | 484篇 |
原子能技术 | 14篇 |
自动化技术 | 1篇 |
出版年
2017年 | 3篇 |
2016年 | 8篇 |
2015年 | 2篇 |
2014年 | 4篇 |
2013年 | 3篇 |
2011年 | 5篇 |
2010年 | 5篇 |
2009年 | 4篇 |
2008年 | 7篇 |
2007年 | 7篇 |
2006年 | 6篇 |
2005年 | 3篇 |
2004年 | 2篇 |
2003年 | 9篇 |
2002年 | 9篇 |
2001年 | 4篇 |
2000年 | 6篇 |
1999年 | 28篇 |
1998年 | 143篇 |
1997年 | 82篇 |
1996年 | 65篇 |
1995年 | 32篇 |
1994年 | 36篇 |
1993年 | 35篇 |
1992年 | 5篇 |
1991年 | 8篇 |
1990年 | 8篇 |
1989年 | 14篇 |
1988年 | 13篇 |
1987年 | 3篇 |
1986年 | 7篇 |
1985年 | 10篇 |
1984年 | 4篇 |
1983年 | 4篇 |
1982年 | 6篇 |
1981年 | 7篇 |
1980年 | 4篇 |
1979年 | 7篇 |
1978年 | 7篇 |
1977年 | 30篇 |
1976年 | 29篇 |
1975年 | 4篇 |
1974年 | 4篇 |
1973年 | 6篇 |
1972年 | 3篇 |
1971年 | 7篇 |
1970年 | 5篇 |
1969年 | 5篇 |
1968年 | 6篇 |
1966年 | 3篇 |
排序方式: 共有727条查询结果,搜索用时 0 毫秒
111.
AR Tuguz MV Kiselevski? AM Buntsevich DV Komov BE Polotski? VA Normantovich IG Komarov EM Roshchin TS Golubeva SN Bykovskaia 《Canadian Metallurgical Quarterly》1996,121(2):192-195
Testicular germ cell tumour is said to be a model for curable neoplasm. However, the prognosis of primary extragonadal germ cell tumour does not appear to be as promising. Though similar in histology, the biology of primary extragonadal germ cell tumour is different as exemplified by the patients in this review. Eight patients with primary mediastinal germ cell tumours were treated with intensive cisplatin-based chemotherapy. All, except one, had non-seminomatous components. The poor prognosis of mediastinal germ cell tumour is due to a combination of poor treatment results with the cisplatin-based regimen and the development of non-germ cell and haematological malignancies. 相似文献
112.
DV Kovacevic V Topalov D Kovacevi? N Radovanovi? 《Canadian Metallurgical Quarterly》1998,51(1-2):73-75
INTRODUCTION: The objective of this study was to examine the occurrence of asymptomatic myocardial ischemia prior to and after myocardial revascularization in patients with multivessel occlusive coronary disease. Asymptomatic ischemia can be described as real ischemia without anginal pain or other ischemic symptoms in patients with coronary disease or coronary artery spasm. Our study examined silent ischemia after myocardial revascularization. Early detection of silent ischemia is important for prevention of cardiac incidents. MATERIAL AND METHODS: We have examined patients with multivessel coronary disease with occurrence of continued preoperative silent ischemia. All patients have undergone ECG examination, exercise stress test and Holter-monitoring prior to and after myocardial revascularization. RESULTS: The investigation comprised 27 patients and their average age was 54.5 years. All patients with silent ischemia had a multivessel occlusive coronary disease and have undergone myocardial revascularization managed with triple or quadruple aortocoronary bypass surgery. Exercise stress test was performed postoperatively in elder patients, as well as ECG and Holter-monitoring. Silent ischemia was established in 21.6% of patients, while in 87.5% untreated diabetes mellitus was diagnosed. Silent ischemia most often occurred in the early morning hours and it was frequently associated with heart rhythm disturbances (VES) whereas these rhythm disturbances depended on the length of the ischemic episode. Intermittent 2nd degree atrioventricular block was found in one patient. CONCLUSION: Silent myocardial ischemia occurred in 21% of patients after myocardial revascularization. It is most often detected in the early morning hours and is associated with ventricular rhythm disorders. Silent ischemia is easily detected by simple examination procedures providing adequate therapy and prevention of cardiac incidents. 相似文献
113.
DV Averin 《Canadian Metallurgical Quarterly》1994,50(12):8934-8937
114.
N. I. Zverev Yu. P. Korotaev V. I. Maron 《Journal of Engineering Physics and Thermophysics》1982,43(5):1202-1207
Condensation kinetics is described with allowance for the dependence of the temperature of the phase transformation on the pressure and concentration of the condensing gas at the phase boundary.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 43, No. 5, pp. 727–733, November, 1982. 相似文献
115.
V. S. Klimenko V. G. Skadin E. A. Astakhov A. I. Zverev 《Powder Metallurgy and Metal Ceramics》1982,21(4):307-310
Conclusions An empirical formula is given expressing the relationship between the strength of adhesion of detonation-deposited coatings to substrates and the heat capacity of the particles of a powdered material being deposited at the instant of coating formation. An expression has been derived for the variation of a dimensionless temperature with powder particle size. A procedure has been developed for determining the optimum composition of an explosive gas mixture for the detonation deposition of various materials.Translated from Poroshkovaya Metallurgiya, No. 4(232), pp. 61–65, April, 1982. 相似文献
116.
The clinical and microbiological findings in a chronic case of lacrimal canaliculitis due to Arachnia propionica are described. Bacterial culture and identification should be performed in the investigation of the disease in order to establish the role of A. propionica and other specific actinomycetes at the acute as well as at the chronic stage. 相似文献
117.
118.
119.
120.