全文获取类型
收费全文 | 1008篇 |
免费 | 55篇 |
专业分类
电工技术 | 13篇 |
化学工业 | 203篇 |
金属工艺 | 46篇 |
机械仪表 | 19篇 |
建筑科学 | 38篇 |
矿业工程 | 1篇 |
能源动力 | 40篇 |
轻工业 | 57篇 |
水利工程 | 3篇 |
无线电 | 98篇 |
一般工业技术 | 181篇 |
冶金工业 | 154篇 |
原子能技术 | 12篇 |
自动化技术 | 198篇 |
出版年
2024年 | 2篇 |
2023年 | 15篇 |
2022年 | 25篇 |
2021年 | 38篇 |
2020年 | 24篇 |
2019年 | 21篇 |
2018年 | 29篇 |
2017年 | 45篇 |
2016年 | 41篇 |
2015年 | 27篇 |
2014年 | 35篇 |
2013年 | 51篇 |
2012年 | 80篇 |
2011年 | 76篇 |
2010年 | 54篇 |
2009年 | 61篇 |
2008年 | 67篇 |
2007年 | 44篇 |
2006年 | 33篇 |
2005年 | 31篇 |
2004年 | 19篇 |
2003年 | 19篇 |
2002年 | 9篇 |
2001年 | 7篇 |
2000年 | 11篇 |
1999年 | 9篇 |
1998年 | 38篇 |
1997年 | 23篇 |
1996年 | 14篇 |
1995年 | 8篇 |
1994年 | 10篇 |
1993年 | 8篇 |
1992年 | 4篇 |
1991年 | 8篇 |
1990年 | 7篇 |
1989年 | 6篇 |
1988年 | 3篇 |
1987年 | 9篇 |
1986年 | 7篇 |
1985年 | 4篇 |
1984年 | 5篇 |
1982年 | 3篇 |
1981年 | 4篇 |
1980年 | 4篇 |
1979年 | 3篇 |
1977年 | 2篇 |
1976年 | 7篇 |
1973年 | 3篇 |
1967年 | 2篇 |
1964年 | 1篇 |
排序方式: 共有1063条查询结果,搜索用时 15 毫秒
91.
Labussière Mathieu Teulière Céline Bernardin Frédéric Ait-Aider Omar 《International Journal of Computer Vision》2022,130(7):1655-1677
International Journal of Computer Vision - This paper presents a novel calibration algorithm for plenoptic cameras, especially the multi-focus configuration, where several types of micro-lenses are... 相似文献
92.
93.
F Koumanov C Henry C Ghezzi JP Mathieu C Morin M Vidal J de Leiris M Comet D Fagret 《Canadian Metallurgical Quarterly》1997,24(6):519-525
Two anomeric analogues of glucose labelled with 123 iodine in position 6, proposed as tracers of glucose transport in vivo, have been synthesized: alpha- and beta-methyl-6-deoxy-6-iodo-D-glucopyranoside (alpha MDIG and beta MDIG). The aim of this study was to determine whether these molecules interact with the glucose transporter and whether they could be used as tracers of glucose transport in vivo. The biodistribution of alpha MDIG and beta MDIG was studied in the mouse in vivo. To determine if these two anomers enter the cell via the glucose transporter, their uptake was measured in isolated perfused rat hearts, in human erythrocytes in suspension, and in cardiomyocytes of neonatal rat in culture. Both alpha MDIG and beta MDIG had similar repartitions in the mouse: myocardial uptake averaged 7% of the injected dose/g of organ at 2 min postinjection and alpha MDIG competed with D-glucose to enter the cells. Insulin produced a 123% increase of its uptake in isolated perfused rat hearts and a 100% increase in cardiomyocytes of neonatal rat in culture. alpha MDIG uptake was lowered in the presence of glucose transport inhibitors in each experimental model. An interaction between beta MDIG and glucose transporters was observed only in human erythrocytes in suspension. Only alpha MDIG interacts with the glucose transporter, and thus could be used to estimate glucose transport in vivo. 相似文献
94.
David Levinson Jean Michel Mathieu David Gillen Adib Kanafani 《The Annals of Regional Science》1997,31(2):189-215
This paper examines the full costs, defined as the sum of private and social costs, of a high-speed rail system proposed
for a corridor connecting Los Angeles and San Francisco in California. The full costs include infrastructure, fleet capital
and operating expenses, the time users spend on the system, and the social costs of externalities, such as noise, pollution,
and accidents. Comparing these full costs to those of other competing modes contributes to the evaluation of the feasibility
of high-speed rail in the corridor. The paper concludes that high-speed rail is significantly more costly than expanding existing
air service, and marginally more expensive than auto travel. This suggests that high-speed rail is better positioned to serve
shorter distance markets where it competes with auto travel than longer distance markets where it substitutes for air.
Received: May 1996 / Accepted in revised form: December 1996 相似文献
95.
Mathieu Thevenot Sylvie Dousset Philippe Schmitt-Kopplin 《The Science of the total environment》2009,407(14):4297-4302
Diuron is frequently detected in some drinking water reservoirs under the Burgundy vineyards, where organic amendments are applied. The environmental effect of these amendments on pesticide transport is ambiguous: on the one hand it could enhance their retention by increasing soil organic carbon content; on the other hand, dissolved organic matter (DOM) could facilitate their transport. Elutions were performed using columns packed with glass beads in order to investigate DOM-diuron interactions, and the possible co-transport of diuron and DOM. Four organic amendments (A, B, C and D) were tested; C and D were sampled at fresh (F) and mature (M) stages. An increase in diuron leaching was observed only for A and DF amendments (up to 16% compared to the DOM-free blank samples), suggesting a DOM effect on diuron transport. These results could be explained by the higher DOM leaching for A and DF compared to B, CF, CM and DM increasing diuron-DOM interactions. These interactions seem to be related to the aromatic and aliphatic content of the DOM, determining formation of hydrogen and non-covalent bonds. The degree of organic matter maturity does not seem to have any effect with amendment C, while a reduction in diuron leaching is observed between DF and DM. After equilibrium dialysis measurement of diuron-DOM complexes, it appeared that less than 3% of the diuron applied corresponded to complexes with a molecular weight > 1000 Da. Complexes < 1000 Da could also take part in this facilitated transport. 相似文献
96.
97.
Medical decision protocols constitute theories for health-care decision making that are applicable for “standard” medical
cases but have to be adapted for the other cases. This holds in particular for the breast cancer treatment protocol studied
in the Kasimir research project. Protocol adaptations can be seen as knowledge-intensive case-based decision support processes. Some examples
of adaptations that have been performed by oncologists are presented in this paper. Several issues are then identified that
need to be addressed while trying to model such processes, namely: the complexity of adaptations, the lack of relevant information
about the patient, the necessity to take into account the applicability and the consequences of a decision, the closeness
to decision thresholds, and the necessity to consider some patients according to different viewpoints. As handling these issues
requires some additional knowledge, which has to be acquired, different methods are presented that perform adaptation knowledge
acquisition either from experts, or in a semi-automatic manner. A discussion and a conclusion end the paper. 相似文献
98.
Mathieu John E.; Heffner Tonia S.; Goodwin Gerald F.; Salas Eduardo; Cannon-Bowers Janis A. 《Canadian Metallurgical Quarterly》2000,85(2):273
The influence of teammates' shared mental models on team processes and performance was tested using 56 undergraduate dyads who "flew" a series of missions on a personal-computer-based flight-combat simulation. The authors both conceptually and empirically distinguished between teammates' task- and team-based mental models and indexed their convergence or "sharedness" using individually completed paired-comparisons matrices analyzed using a network-based algorithm. The results illustrated that both shared-team- and task-based mental models related positively to subsequent team process and performance. Furthermore, team processes fully mediated the relationship between mental model convergence and team effectiveness. Results are discussed in terms of the role of shared cognitions in team effectiveness and the applicability of different interventions designed to achieve such convergence. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
99.
100.