首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   225篇
  免费   2篇
  国内免费   10篇
教育   73篇
科学研究   115篇
综合类   5篇
信息传播   44篇
  2023年   2篇
  2022年   2篇
  2021年   2篇
  2020年   7篇
  2019年   21篇
  2018年   16篇
  2017年   9篇
  2016年   3篇
  2015年   4篇
  2014年   15篇
  2013年   11篇
  2012年   17篇
  2011年   14篇
  2010年   14篇
  2009年   9篇
  2008年   13篇
  2007年   9篇
  2006年   14篇
  2005年   5篇
  2004年   10篇
  2003年   7篇
  2002年   8篇
  2001年   11篇
  2000年   6篇
  1999年   2篇
  1998年   2篇
  1997年   1篇
  1993年   2篇
  1988年   1篇
排序方式: 共有237条查询结果,搜索用时 15 毫秒
81.
我国办公自动化系统的管理元数据方案研究   总被引:1,自引:0,他引:1  
通过对国家档案局征求意见的两项电子文件管理元数据规范的比较分析,以及对我国电子政务已有的办公文档元数据与数据元标准的分析,说明我国电子文档管理元数据与电子办公文档管理元数据设计的缺陷,以及由此带来的后果.在此基础上,该文对我国办公自动化系统必须建设的管理元数据方案提出了4点建议:办公自动化系统通用管理元数据标准建设,办公自动化系统的元数据格式的规范化,电子文档管理元数据与电子文件管理元数据的关联与区别,办公自动化元数据方案制定应具有可执行性.本文图8个,表5个.  相似文献   
82.
In this paper, the finite-time stabilization problem for memristor-based inertial neural networks (MINNs) with discontinuous activations (DAs) and distributed delays is investigated. To deal with the discontinuous property of the MINNs, the nonsmooth analysis theory is invoked. Furthermore, to simplify the MINNs with second-order state derivative, an order-reduced method is adopted. Then the second-order MINNs is transformed into a simpler first-order differential system. Moreover, the verifiable algebraic criteria are derived for the finite-time stabilization of MINNs with DAs and distributed delays under the designed control approach. Finally, the effectiveness of the obtained results are illustrated via numerical simulations.  相似文献   
83.
In this paper, we present the dimensionless form of a chaotic permanent magnet synchronous motor (PMSM). Its Kolmogorov formalism, which can be used to describe dissipative-forced dynamical systems, shows that there exist four types of torques, i.e., inertial torque, internal torque, dissipative torque and external torque. The mechanical analysis of the dimensionless PMSM is given for five different combinations of these torques. Numerical simulations show that the occurrence of chaos depends on these four types of torques. Moreover, the ultimate boundary estimation of the dimensionless chaotic PMSM is also investigated theoretically and numerically.  相似文献   
84.
The problem of observer-based finite-time H control for discrete-time Markov jump systems with time-varying transition probabilities and uncertainties is studied in this paper, in which time-varying transition probabilities are modelled as convex polyhedron, and the parameter uncertainty satisfies norm-bounded. First of all, a Luenberger observer is designed to measure the system state. Then, observer-based controller is constructed to ensure the stochastic finite-time boundedness of the resulting closed-loop system with an H performance. Furthermore, sufficient conditions are derived in light of linear matrix inequalities. In the end, the flexibility and applicability of the developed methods are demonstrated by two illustrative examples.  相似文献   
85.
This paper is concerned with the quantitative mean square exponential stability and stabilization for stochastic systems with Markovian switching. First, the concept of quantitative mean square exponential stability(QMSES) is introduced, and two stability criteria are derived. Then, based on an auxiliary definition of general finite-time mean square stability(GFTMSS), the relations among QMSES, GFTMSS and finite time stochastic stability (FTSS) are obtained. Subsequently, QMSE-stabilization is investigated and several new sufficient conditions for the existence of the state and observer-based controllers are provided by means of linear matrix inequalities. An algorithm is given to achieve the relation between the minimum states’ upper bound and the states’ decay velocity. Finally, a numerical example is utilized to show the merit of the proposed results.  相似文献   
86.
This paper studies a scaled consensus problem with output saturation in the sense that the states of agents reach assigned proportions rather than a common consensus value. Specifically, we investigate single-integrator agents with output saturation under both undirected and strongly connected graphs. Some conditions for single-integrator agents with output saturation are illustrated. The main contribution is that by employing an integral Lyapunov function, a necessary and sufficient condition is first obtained to reach scaled consensus among agents with output saturation. Simulation results are presented to show the performance of the scaled consensus.  相似文献   
87.
近几十年我国新建了许多中小型的排灌泵站,这些站建立至今技术上已经落后,亟待现代化改造。本文是小型泵站现代化改造的经验的总结,详述了小型泵站的自动化监测系统,包括:硬件的选择、软件的选择、组态软件的编程、数据库编程等。整个系统十分适用于小型排灌泵站的自动化改造。  相似文献   
88.
Among the galaxy of research and development organizations in northwest Beijing's Zhongguancun district, known as China's Silicon Valley, two are especially well-known to IT researchers: Microsoft Research Asia (MSRA), and, within a few blocks on the other side of the street, the CAS Institute of Automation (CASIA). While most people in Chinese scientific organizations strive to move to a large foreign counterpart, Dr. Stan Z. Li (LI Ziqing) moves against the stream.  相似文献   
89.
办公自动化专业综合实训教学探索   总被引:2,自引:0,他引:2  
实训课是以学生综合运用多门课程结构,以实际动手操作训练为主要特征的综合演练,其目的是培养学生的综合职业技术,实施中应注意课题的选取,时间安排和实训环节设计,以切实有效地提高学生的动手能力。  相似文献   
90.
标准编写工作涉及大量文本格式的编排工作,通过WordVBA编程可实现标准编写工作的自动化,提高工作效率。依据标准编写要求,编程实现了标准编写工作的"一键式"快速设置各类段落样式,快速生成标准封面、目次、公式题注、正文脚注等工作,极大方便了标准编写工作。  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号