全文获取类型
收费全文 | 3846篇 |
免费 | 14篇 |
国内免费 | 1篇 |
专业分类
电工技术 | 141篇 |
化学工业 | 466篇 |
金属工艺 | 267篇 |
机械仪表 | 350篇 |
建筑科学 | 19篇 |
矿业工程 | 69篇 |
能源动力 | 4篇 |
轻工业 | 38篇 |
水利工程 | 97篇 |
石油天然气 | 115篇 |
无线电 | 460篇 |
一般工业技术 | 822篇 |
冶金工业 | 758篇 |
原子能技术 | 98篇 |
自动化技术 | 157篇 |
出版年
2022年 | 46篇 |
2021年 | 68篇 |
2020年 | 61篇 |
2019年 | 85篇 |
2018年 | 202篇 |
2017年 | 223篇 |
2016年 | 267篇 |
2015年 | 127篇 |
2014年 | 173篇 |
2013年 | 236篇 |
2012年 | 169篇 |
2011年 | 207篇 |
2010年 | 187篇 |
2009年 | 216篇 |
2008年 | 185篇 |
2007年 | 195篇 |
2006年 | 187篇 |
2005年 | 96篇 |
2004年 | 60篇 |
2003年 | 33篇 |
2002年 | 38篇 |
2001年 | 29篇 |
2000年 | 103篇 |
1999年 | 79篇 |
1998年 | 197篇 |
1997年 | 151篇 |
1996年 | 55篇 |
1995年 | 31篇 |
1994年 | 12篇 |
1993年 | 26篇 |
1992年 | 5篇 |
1990年 | 2篇 |
1989年 | 3篇 |
1988年 | 2篇 |
1987年 | 3篇 |
1985年 | 4篇 |
1984年 | 2篇 |
1983年 | 2篇 |
1982年 | 3篇 |
1981年 | 5篇 |
1980年 | 8篇 |
1979年 | 3篇 |
1978年 | 6篇 |
1977年 | 18篇 |
1976年 | 24篇 |
1975年 | 2篇 |
1974年 | 12篇 |
1973年 | 5篇 |
1969年 | 2篇 |
1967年 | 1篇 |
排序方式: 共有3861条查询结果,搜索用时 15 毫秒
51.
52.
53.
54.
Probability models and their possibility counterparts of one-matrix and bimatrix games of two subjects (A and B) were defined and analyzed. For the one-matrix game possibility model, a theorem was proven saying that maximin and minimax
fuzzy strategies exist and that possibilities of A winning or losing (B) in relation to these strategies are equal. The concepts of fuzzy and randomized game strategies were defined and analyzed.
The problem of statistic modeling of A and B fuzzy strategies was resolved. For possible models of bimatrix games, the existence of equilibrium points was examined. For
the problem of maximization of the winning A and B possibility, it was proven that equilibrium points exist. For the problem of minimizing the possibility of losses, it was
shown that if equilibrium points exist, some of them are related to clear strategies, A and B. 相似文献
55.
V. V. Grigor’ev V. A. Lazarev N. A. Neverova A. L. Mityurev A. B. Pnev S. V. Tikhomirov 《Automation and Remote Control》2010,71(10):2200-2208
Functionality and technical features of modern industrial fiber-optic sensors on Bragg gratings are considered. Feasibility
to design information-measuring systems for such sensors involving the improved concept of calibration based on acetylene
cavity is studied. The results of investigation regarding the design and analysis of the prototypical information-measuring
system are discussed. 相似文献
56.
A. S. Klimovich V. V. Solov’ev 《Journal of Computer and Systems Sciences International》2010,49(6):900-908
The problem of transformation of a Mealy finite-state machine (FSM) into an equivalent Moore FSM is considered. This problem
often arises in the practice of engineering design, when one needs to avoid direct dependence of the output values on variations
in the input values. The proposed approach uses the operation of splitting of internal states of an FSM and represents the
machine as a list of transitions. Experiment results have shown that transformation of Mealy FSM into Moore FSM increases
the number of internal states, on the average, by a factor of 1.96 and increases the number of transitions by a factor of
2.05; the cost of realization of Moore FSM using an industrial software package is approximately twice as great as the corresponding
cost for a Mealy machine. The up-to-date tendencies of development of minimization methods and Moore FSM synthesis are described. 相似文献
57.
The problem of multimodal clustering arises whenever the data are gathered with several physically different sensors. Observations from different modalities are not necessarily aligned in the sense there there is no obvious way to associate or compare them in some common space. A solution may consist in considering multiple clustering tasks independently for each modality. The main difficulty with such an approach is to guarantee that the unimodal clusterings are mutually consistent. In this letter, we show that multimodal clustering can be addressed within a novel framework: conjugate mixture models. These models exploit the explicit transformations that are often available between an unobserved parameter space (objects) and each of the observation spaces (sensors). We formulate the problem as a likelihood maximization task and derive the associated conjugate expectation-maximization algorithm. The convergence properties of the proposed algorithm are thoroughly investigated. Several local and global optimization techniques are proposed in order to increase its convergence speed. Two initialization strategies are proposed and compared. A consistent model selection criterion is proposed. The algorithm and its variants are tested and evaluated within the task of 3D localization of several speakers using both auditory and visual data. 相似文献
58.
For a linear controllable system, the problem of reconstruction of all input signals, which are compatible with the measured signal, is considered. It is assumed that information can be transmitted in a processing center only via digital communication channel at discrete time instants, and the word length is limited. In this connection, there are encoding and decoding devices in the communication channel. For simplicity, the communication channel is assumed to be noiseless and delay-free. Defining relationships are obtained for the set of compatible input signals, as well as relationships between reconstruction precision, length of transmitted word and transmission frequency. 相似文献
59.
V. A. Vasil’ev 《Automation and Remote Control》2016,77(11):2080-2089
The paper suggests the concept of A-equilibrium that is a concretization of the “altruistic” Berge equilibrium adapted to the pure exchange models with externalities. In contrast to the classical markets, these models consider the external influence on the preferences of economic agents. In terms of an appropriate fuzzy domination, a cooperative characterization of the A-equilibrium allocations is given, and an analog of the classic core equivalence theorem is established. 相似文献
60.
LIa Iukel'son OV Krasil'nikov EE Gussakovski? BA Tashmukhamedov 《Canadian Metallurgical Quarterly》1977,22(5):806-810
It has been stated that boiled for three hours haemocytocardiotoxin (HT) from cobra poison loses "direct" hemolytic activity and is unable to potentiate a haemolytic effect of phospholipase A. Surface activity of HT does not change. It is shown that in the course of heat denaturation the aggregation of toxin molecules to dimers and trimers takes place and electrophoretic mobility is decreased. The fluorescence of HT tyroxin residues supported the fact of its irreversible heat denaturation. 相似文献