全文获取类型
收费全文 | 74篇 |
免费 | 2篇 |
专业分类
化学工业 | 45篇 |
建筑科学 | 6篇 |
水利工程 | 1篇 |
一般工业技术 | 2篇 |
冶金工业 | 21篇 |
自动化技术 | 1篇 |
出版年
2018年 | 1篇 |
2017年 | 1篇 |
2010年 | 1篇 |
2009年 | 1篇 |
2008年 | 1篇 |
2007年 | 2篇 |
2006年 | 1篇 |
2004年 | 1篇 |
2003年 | 1篇 |
2000年 | 1篇 |
1998年 | 1篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1992年 | 3篇 |
1991年 | 1篇 |
1989年 | 3篇 |
1987年 | 1篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1981年 | 2篇 |
1974年 | 1篇 |
1970年 | 1篇 |
1969年 | 1篇 |
1959年 | 1篇 |
1955年 | 1篇 |
1954年 | 1篇 |
1947年 | 3篇 |
1946年 | 1篇 |
1945年 | 1篇 |
1944年 | 3篇 |
1943年 | 5篇 |
1942年 | 3篇 |
1941年 | 1篇 |
1940年 | 2篇 |
1939年 | 2篇 |
1938年 | 3篇 |
1937年 | 3篇 |
1936年 | 3篇 |
1935年 | 4篇 |
1934年 | 1篇 |
1933年 | 4篇 |
1932年 | 1篇 |
排序方式: 共有76条查询结果,搜索用时 15 毫秒
31.
Ronald P. Krom Frits P. Tolman 《Computer-Aided Civil and Infrastructure Engineering》1992,7(2):121-129
Abstract: This paper describes some of the results of the authors' research on autonomous construction robotics. The objective of our research is to find out whether autonomous construction robots are feasible or not, and how autonomous construction robotics might be achieved. The paper presents the information technologies required and an initial (simulated) example of an autonomous tiling robot. 相似文献
32.
Kevin Tolman Bing Liu Katherine Bedke Xiang Ming Chen 《Journal of the American Ceramic Society》2017,100(1):429-442
Models for composition–structure relationships are useful in both the lab and industry, yet few exist for perovskites‐containing extrinsic defects or cation ordering. In this work, an empirical model is used to predict the existence of A‐site cation ordering. Specifically, four compositions in the Na(1?3x)/2La(1+x)/2TiO3 system (x = 0.0, 0.0533, 0.1733 and 0.225) were synthesized using a conventional solid‐state mixed‐oxide method. The structure of the x = 0 end‐member (Na0.5La0.5TiO3) has been reported in various space groups, but always with a random distribution of Na+ and La3+ on the A site; however, empirical modeling suggests that it is not only ordered but also that a small volume increase accompanies the ordering process. While no evidence of long‐range A‐site ordering is observed in this composition via X‐ray or neutron diffraction, electron‐diffraction data indicate short‐range ordering of Na+ and La3+ ions, with the degree of cation ordering decreasing (but the scale of ordered domains and degree of vacancy ordering generally increasing) with increasing x. First‐principles calculations via density functional theory support both conclusions that short‐range ordering in Na0.5La0.5TiO3 is stable and that it results in a volume increase with respect to the disordered analog. A similar analysis has been conducted for the Li(1?3x)/2La(1+x)/2TiO3 and Na(1?3x)/2La(1+x)/2(Mg0.5W0.5)O3 solid solutions. These systems provide additional validation of the accuracy and versatility of the empirical modeling method used. 相似文献
33.
Surgical, medical, and prosthodontic records of 61 consecutively treated patients with mandibular discontinuity were reviewed retrospectively. All 61 patients had undergone discontinuity reconstruction with autogenous bone grafts; 31 of 61 had also received endosseous dental implants and a dental osseoprosthesis. Of these 31 implant-reconstructed patients, 23 had free autogenous nonvascularized and 8 had vascularized bone grafts. The surgical-prosthetic protocol consisted primarily of secondary, free autogenous nonvascularized bone graft reconstruction and secondary root-form endosseous implant and fixed prosthesis dental reconstruction. Vascularized bone (8 patients) or soft tissue (4 patients) grafts were utilized selectively for severely compromised patients after extensive oncologic resection, avulsive trauma, or after previous radiation treatment. Endosseous implant survival (95.5% in 31 patients), autogenous bone graft success (98.4% in 61 patients), and dental osseoprosthesis success (100% in 31 patients) were favorable. A high incidence (9.1%) of nonfunctioning (sleeping) implants was recorded for this patient population. The need to remove the titanium mesh tray for various reasons (17.6%) and the need to reconstruct soft tissue in the irradiated patient (12%) were noteworthy. 相似文献
34.
35.
E. W. Blank E. W. Colt F. G. Dollear Jacob Fitelson J. C. Konen M. L. Laing C. P. Long J. E. Maroney R. T. Milner L. B. Parsons H. A. Schuette L. M. Tolman F. C. Woekel D. S. Bolley L. R. Brown C. A. Coffey Geo Crump G. M. Davidson W. K. Hilty Francis Scofield V. C. Mehlenbacher 《Journal of the American Oil Chemists' Society》1947,24(3):76-79
36.
37.
38.
39.
40.