全文获取类型
收费全文 | 17129篇 |
免费 | 1806篇 |
国内免费 | 858篇 |
专业分类
电工技术 | 560篇 |
技术理论 | 1篇 |
综合类 | 1329篇 |
化学工业 | 250篇 |
金属工艺 | 131篇 |
机械仪表 | 541篇 |
建筑科学 | 7910篇 |
矿业工程 | 128篇 |
能源动力 | 103篇 |
轻工业 | 86篇 |
水利工程 | 64篇 |
石油天然气 | 195篇 |
武器工业 | 144篇 |
无线电 | 2087篇 |
一般工业技术 | 375篇 |
冶金工业 | 102篇 |
原子能技术 | 26篇 |
自动化技术 | 5761篇 |
出版年
2024年 | 170篇 |
2023年 | 416篇 |
2022年 | 591篇 |
2021年 | 652篇 |
2020年 | 745篇 |
2019年 | 574篇 |
2018年 | 334篇 |
2017年 | 329篇 |
2016年 | 308篇 |
2015年 | 453篇 |
2014年 | 1107篇 |
2013年 | 842篇 |
2012年 | 1166篇 |
2011年 | 1295篇 |
2010年 | 1026篇 |
2009年 | 1175篇 |
2008年 | 1252篇 |
2007年 | 1336篇 |
2006年 | 1117篇 |
2005年 | 985篇 |
2004年 | 829篇 |
2003年 | 693篇 |
2002年 | 480篇 |
2001年 | 400篇 |
2000年 | 362篇 |
1999年 | 267篇 |
1998年 | 158篇 |
1997年 | 114篇 |
1996年 | 83篇 |
1995年 | 92篇 |
1994年 | 65篇 |
1993年 | 52篇 |
1992年 | 59篇 |
1991年 | 49篇 |
1990年 | 31篇 |
1989年 | 32篇 |
1988年 | 40篇 |
1987年 | 19篇 |
1986年 | 15篇 |
1985年 | 28篇 |
1984年 | 26篇 |
1983年 | 9篇 |
1982年 | 5篇 |
1980年 | 2篇 |
1979年 | 4篇 |
1978年 | 1篇 |
1977年 | 1篇 |
1976年 | 1篇 |
1965年 | 1篇 |
1955年 | 1篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
An implementation for a fast public-key cryptosystem 总被引:9,自引:0,他引:9
In this paper we examine the development of a high-speed implementation of a system to perform exponentiation in fields of the form GF(2
n
). For sufficiently large n, this device has applications in public-key cryptography. The selection of representation and observations on the structure of multiplication have led to the development of an architecture which is of low complexity and high speed. A VLSI implementation has being fabricated with measured throughput for exponentiation for cryptographic purposes of approximately 300 kilobits per second. 相似文献
22.
针对目前应用在UNIX系统中入侵检测知识库适应能力不足的问题.提出了一种适应于不同系统环境的知识库体系结构。检测规则按相应系统与服务类型以模块化形式存储,通过应用配制文件加载。实现了入侵检测知识库的可扩展性.提高了入侵检测知识库的通用性,并且可以提高检测规则的搜索效率。 相似文献
23.
Yu. S. Yakovlev 《Cybernetics and Systems Analysis》2003,39(5):765-776
Distinctive features of architectural-structural organization and use of memory networks are considered with the aim of choosing an optimal configuration in designing distributed computer systems. 相似文献
24.
This paper presents the Navigation Maps Modeling approach (NMM), which provides platform independent models for characterizing navigation maps of web applications. The NMM approach is conceived to obtain a trade off between high and low-level design notations. As high-level design notations, NMM models permit architectural details that may hinder the overall understanding of the web application to be left out. As low-level design notations, NMM models can easily be transformed into detailed architectural designs, which are very valuable at coding and maintenance stages. 相似文献
25.
This paper presents the development of an event-driven control architecture and its implementation in a physical simulator of a computerized manufacturing system using object-oriented techniques. The architecture was developed to improve the efficiency of handling concurrent control events in the DOS environment. In the implementation, the control system of the physical simulator consists of four distinct layers of control devices: a PC/386 computer, a microcontroller, I/O modules and the system's control devices such as motors, solenoids and sensors. A control program residing in the PC/386 coordinates system-level tasks such as event scheduling, while a BASIC program running on the microcontroller handles all low-level control tasks such as sensor monitoring and motion control. The concepts and developments presented in this paper should help in implementing an efficient control system for both CIM systems and their physical simulators. 相似文献
26.
全金属反射光学系统结构的有限元分析 总被引:3,自引:1,他引:2
用有限元分析方法对全金属反射光学系统在各种受力状态下的变形、应力及固有频率做了全面的分析,并给出了结构多次优化后的分析结果。 相似文献
27.
针对近几年安阳市城区规模的不断扩大和安东新区的开发启动以及房地产市场的迅速发展,根据相关标准,结合安阳市城市发展的实际需要,提出了安阳市民用建筑有线电视管道工程设计及施工规范。 相似文献
28.
A new evaluation model for SK combinator expressions is presented and used as a basis for the design of a novel processor. The resulting machine architecture resembles a dataflow ring, but executions are constrained to be fully lazy. An automatic dynamic load sharing mechanism for a distributed multiprocessor architecture is suggested, and initial simulation results are presented. 相似文献
29.
This paper deals with the issues of development and implementation of a real-time NURBS interpolator for a six-axis robot. Using an open-architecture controller system as a testbed, a real-time NURBS curve interpolator was developed, implemented and tested. Sample runs were conducted with the resulting trajectories measured in real-time during robot motion. The resulting trajectories are analyzed, discussed and compared with those from a commonly used point-to-point approximation technique. The real-time NURBS curve interpolator's feasibility, advantages and related issues are also discussed. 相似文献
30.
A whole‐program MATLAB to C translation system is presented. The paper outlines the motivation for the problem, discusses the system's architecture, its features and limitations. The translator's operation is explained using an example input program. Details are given on how the system implements and specializes some of the language's built‐in primitives. Finally, the paper reports measurements evaluating the execution time and memory usage of the translated sources, and the compilation time required for the translations. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献