全文获取类型
收费全文 | 5137篇 |
免费 | 140篇 |
国内免费 | 63篇 |
专业分类
电工技术 | 166篇 |
综合类 | 286篇 |
化学工业 | 840篇 |
金属工艺 | 68篇 |
机械仪表 | 85篇 |
建筑科学 | 1298篇 |
矿业工程 | 314篇 |
能源动力 | 188篇 |
轻工业 | 168篇 |
水利工程 | 56篇 |
石油天然气 | 38篇 |
武器工业 | 7篇 |
无线电 | 437篇 |
一般工业技术 | 241篇 |
冶金工业 | 239篇 |
原子能技术 | 14篇 |
自动化技术 | 895篇 |
出版年
2024年 | 2篇 |
2023年 | 32篇 |
2022年 | 37篇 |
2021年 | 44篇 |
2020年 | 64篇 |
2019年 | 79篇 |
2018年 | 59篇 |
2017年 | 68篇 |
2016年 | 120篇 |
2015年 | 136篇 |
2014年 | 239篇 |
2013年 | 224篇 |
2012年 | 305篇 |
2011年 | 424篇 |
2010年 | 253篇 |
2009年 | 545篇 |
2008年 | 642篇 |
2007年 | 422篇 |
2006年 | 469篇 |
2005年 | 330篇 |
2004年 | 166篇 |
2003年 | 147篇 |
2002年 | 92篇 |
2001年 | 88篇 |
2000年 | 62篇 |
1999年 | 61篇 |
1998年 | 37篇 |
1997年 | 47篇 |
1996年 | 26篇 |
1995年 | 24篇 |
1994年 | 15篇 |
1993年 | 13篇 |
1992年 | 10篇 |
1991年 | 7篇 |
1990年 | 5篇 |
1989年 | 9篇 |
1988年 | 1篇 |
1987年 | 3篇 |
1986年 | 4篇 |
1985年 | 6篇 |
1984年 | 8篇 |
1983年 | 3篇 |
1982年 | 1篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1979年 | 3篇 |
1976年 | 2篇 |
1971年 | 1篇 |
1970年 | 1篇 |
1964年 | 2篇 |
排序方式: 共有5340条查询结果,搜索用时 15 毫秒
71.
V. A. Pogorelov 《Automation and Remote Control》2008,69(8):1311-1318
The state vector and observer equations are obtained for a strapdown (gimballess) navigation system with three accelerometers, three angular rate sensors, and a barometric altimeter. These equations are based on the nonlinear filtration methods that ensure required estimation accuracy under arbitrary space maneuver of a vehicle. 相似文献
72.
M. V. Gubko 《Automation and Remote Control》2008,69(9):1552-1575
A survey of Russian and foreign papers devoted to one of the burning trends of the theory of control of social and economic systems, i.e., mathematical models of formational of rational organization hierarchies is made. The following lines of investigations are emphasized: multilevel symmetrical hierarchies, hierarchies of knowledge, multilevel hierarchies of data processing, hierarchies and command theory, hierarchies of decision-making, hierarchies and contracts theory, and general model of optimal hierarchies search. 相似文献
73.
I. V. Bushlanov A. M. Gortsev L. A. Nezhel’skaya 《Automation and Remote Control》2008,69(9):1517-1533
Consideration was given to estimation of the parameters of the synchronous twofold-stochastic flow of events which makes up a mathematical model of the information flow of demands circulating in the queuing systems and networks. Two variants were studied. For the first variant, the problem of optimal estimation of the parameters of a synchronous flow of events with a finite arbitrary number of states was solved. The second variant differs in that the event flow operates in the environment where part of events is lost during the so-called dead time. Consideration was given to a synchronous flow with two states. The problem of estimating the length of the dead time in the conditions of continued dead time was solved. The results of numerical estimation based on the simulation model of the synchronous flow were presented for both variants. 相似文献
74.
N. V. Voropaeva 《Automation and Remote Control》2008,69(6):920-928
Consideration was given to the linear-quadratic problem of optimal control for the discrete linear system with fast and slow variables under incomplete information about system state. Decomposition of the discrete matrix Riccati equations was carried out. The proposed decomposition algorithm relies on a geometrical approach using the properties of the invariant manifolds of slow and fast motions of the nonlinear multirate discrete systems as basis. The splitting transformation was constructed in the form of asymptotic decomposition in the degrees of a small parameter. 相似文献
75.
V. F. Sokolov 《Automation and Remote Control》2008,69(8):1357-1372
For a linear first-order plant, consideration was given to minimization of the deviation of its output from the specified value in an uncertain environment. Both the parameters of the plant itself and the upper bounds of the external disturbances and operator perturbations in output and control were assumed to be unknown. The suboptimal adaptive control was constructed on the basis of an approximate solution of the problem of optimal identification from the measurement data where the performance of the problem of control was used as an identification criterion. 相似文献
76.
A stochastic process generator based on a chain of modulo-two adders with asynchronous feedback loops is investigated. The generator dynamics is described by the Erlang equations. A mathematical model of the generated stochastic process is proposed. The implementation of the generator using modern electronic devices is considered. 相似文献
77.
A. A. Bobtsov 《Automation and Remote Control》2008,69(8):1289-1296
The paper develops the methods of harmonic disturbance compensation using the measurements of plant output variable. An approach for biased harmonic disturbance compensation is proposed. This approach is superior to known ones in some characteristics. 相似文献
78.
S. F. Yashkov 《Automation and Remote Control》2008,69(9):1622-1629
We present a new proof of Theorem of 1989 about non-stationary (transient) distribution of the number of jobs in the M/G/1 queue with egalitarian processor sharing. To get this goal, we use the well-known method of supplementary variables. The complete proof of that non-trivial Theorem of 1989 (see Theorem 2.1) was first given in the author’s monograph [12, §2.8] (1989) by means of essentially novel analytic method. Before appearing author’s work, this problem had been considered from analytic viewpoint as insoluble one. In essence, Theorem 2.2 almost repeats Theorem 2.1, but with other proof. In Section 3, Theorem 2.2 is extended to the case of an M/G/1-EPS queue with catastrophes which appear according to a Poisson process. 相似文献
79.
A. I. Mikhalskii V. K. Ivanov S. Yu. Chekin M. A. Maksyutov V. V. Kashcheev 《Automation and Remote Control》2008,69(6):1045-1050
The problem is considered of taking account of heterogeneity in the individual radiosensitivity in evaluating the radiation risk of the origin of a disease in a group of persons subjected to the radiation action. Mathematical models are described for the estimation of the radiation risk of the origin of the disease with and without regard for heterogeneity. The use of the described method is demonstrated with an example of the estimation of the risk of the origin of radiation-induced diseases from the class of “solid cancers” among the persons taking part in the liquidation of consequences of the accident at the Chernobyl’ Atomic Power Station (CAPS) in the years 1986–1991. It is shown that the heterogeneity disregard leads to understated estimates of the radiation risk of the origin of radiation-induced solid cancers. The effect is investigated of the length of the latent period in the origin of radiation-induced “solid cancers” in taking account of heterogeneity. 相似文献
80.
Consideration was given to the differential game of one pursuer against a group of one true and one false target in the three-dimensional space where the concordant targets solve the problem of evasion of the true target from being detected by the pursuer. 相似文献