全文获取类型
收费全文 | 148篇 |
免费 | 3篇 |
专业分类
化学工业 | 11篇 |
机械仪表 | 1篇 |
矿业工程 | 1篇 |
水利工程 | 10篇 |
石油天然气 | 4篇 |
无线电 | 5篇 |
一般工业技术 | 19篇 |
冶金工业 | 96篇 |
自动化技术 | 4篇 |
出版年
2021年 | 2篇 |
2019年 | 2篇 |
2018年 | 2篇 |
2017年 | 3篇 |
2016年 | 6篇 |
2015年 | 2篇 |
2014年 | 3篇 |
2013年 | 5篇 |
2012年 | 3篇 |
2010年 | 3篇 |
2009年 | 3篇 |
2008年 | 4篇 |
2006年 | 3篇 |
2004年 | 1篇 |
2003年 | 6篇 |
2002年 | 3篇 |
2000年 | 3篇 |
1999年 | 1篇 |
1997年 | 2篇 |
1996年 | 3篇 |
1995年 | 1篇 |
1994年 | 2篇 |
1993年 | 6篇 |
1992年 | 7篇 |
1991年 | 3篇 |
1990年 | 4篇 |
1989年 | 7篇 |
1988年 | 2篇 |
1987年 | 3篇 |
1986年 | 1篇 |
1985年 | 4篇 |
1984年 | 3篇 |
1983年 | 2篇 |
1982年 | 7篇 |
1981年 | 2篇 |
1980年 | 2篇 |
1979年 | 3篇 |
1978年 | 4篇 |
1977年 | 1篇 |
1976年 | 2篇 |
1975年 | 3篇 |
1974年 | 2篇 |
1973年 | 1篇 |
1972年 | 1篇 |
1971年 | 1篇 |
1969年 | 5篇 |
1968年 | 1篇 |
1967年 | 4篇 |
1966年 | 1篇 |
1965年 | 1篇 |
排序方式: 共有151条查询结果,搜索用时 14 毫秒
1.
2.
Computer modelling of hot pressing is provided. Kinetics are described for compaction during hot pressing in a rigid die, and the change in density distribution, irreversible solid phase strain accumulation, and equivalent stresses are studied by means of the finite element method. Shrinkage during the preparation of complex-shaped articles by hot pressing pure Al2O3 powder in a graphite die without a protective atmosphere and the physicomechanical properties of the finished article are studied. Calculated and experimental results agree satisfactorily. 相似文献
3.
V. V. Skorokhod M. B. Shtern A. V. Kuz’mov A. V. Ragulya 《Powder Metallurgy and Metal Ceramics》2006,45(5-6):221-225
A study has been made on the effects of loading scheme and conditions restricting macroscopic strain on the work-hardening
kinetics and strain accumulation in the solid state in sintering materials with bimodal pore size distributions. Active loading
intensifies the reduction in the small pores. The greatest effect comes from combining sintering with hydrostatic compression.
At the same time, kinematic constraints (partial or complete adhesion in surfaces) substantially retards the shrinkage of
large pores, which means that the porous structure can be controlled.
__________
Translated from Poroshkovaya Metallurgiya, Nos. 5–6(449), pp. 10–15, May–June, 2006. 相似文献
4.
O. V. Konstantinova A. V. Kuz’mov V. V. Skorokhod M. B. Shtern 《Powder Metallurgy and Metal Ceramics》2007,46(1-2):25-31
A theoretical method for determining the percolation limit and effective conductivity of composites based on polydisperse
mixtures of insulator and conductor powders is proposed. The effect of the particle size ratio between the insulator and conductor
on the percolation limit and effective conductivity is studied. Numerical simulation of the microstructure, effective properties,
and percolation limit in composites is discussed.
__________
Translated from Poroshkovaya Metallurgiya, Vol. 46, No. 1–2(453), pp. 31–40, 2007. 相似文献
5.
D Winfield M Silbiger GS Brown L Clarke S Dwyer M Yaffe F Shtern 《Canadian Metallurgical Quarterly》1994,29(4):507-515
Digital mammography is one of the most promising novel technologies for further improvement of early detection of breast cancer, offering important potential advantages: 1) improved image quality; 2) digital image processing for improved lesion contrast; 3) computer-aided diagnosis for enhanced radiologic interpretation; and 4) teleradiology for facilitated radiologic consultation. The Diagnostic Imaging Research Branch of the National Cancer Institute (NCI) recently funded an international, multidisciplinary, multi-institutional Digital Mammography Development Group for collaborations between NCI, the academic community, and industry to facilitate the integrated development and implementation of digital mammographic systems. Currently, however, digital mammography faces a number of fundamental technological roadblocks: 1) cost-effective digital detectors and displays for imaging systems; 2) the need for novel algorithms for image processing and computer-aided diagnosis; and 3) high performance, low cost digital networks to provide an "information superhighway" for teleradiology. To solve some of these technological problems, the Diagnostic Imaging Research Branch of NCI joined efforts with the Technology Transfer Division of the National Aeronautics and Space Administration to pursue a federal technology transfer program in digital mammography. The authors discuss the findings and recommendations of the workshop entitled "Technology Transfer in Digital Mammography," which was organized and held jointly by the NCI and the National Aeronautics and Space Administration in May, 1993. Numerous innovative technologies of varying degree of promise for digital mammography were presented at the conference. In this article, specific technologies presented at the workshop by the federal and federally-supported laboratories are described, and critiques of these technologies by the leaders of the medical imaging community are presented. 相似文献
6.
D. G. Gromov Yu. I. Shtern M. S. Rogachev A. S. Shulyat’ev E. P. Kirilenko M. Yu. Shtern V. A. Fedorov M. S. Mikhailova 《Inorganic Materials》2016,52(11):1132-1136
We have examined the possibility of utilizing thin-film contact layers for producing reliable Ohmic contacts to proposed intermediate-temperature (Bi,Sb)2Te3-based thermoelectric materials with improved thermoelectric properties, which allow the working temperature range to be extended to 600 K. Three contact configurations have been produced by ion-plasma magnetron sputtering: a single Ni layer, Mo/Ni bilayer, and Ni/Ta–W–N/Ni three-layer system. It has been shown that reliable contacts can be produced using Mo/Ni and Ni/Ta–W–N/Ni layers, which prevent interdiffusion between the materials to be joined and ensure good adhesion to the thermoelectric element. 相似文献
7.
8.
9.
This paper is devoted to the theoretical definition of the ultimate plastic capacity for porous solids. The model is based on the assumption that ductile fracture is defined by loss of physical stability. Porosity, strain in hard phase, and decohesion are taken into account as internal variables. We suggest a method for defining the limit surface on the basis of the constitutive relations of plasticity theory for a porous solid. 相似文献
10.