首页 | 官方网站   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   1060篇
  免费   75篇
  国内免费   35篇
工业技术   1170篇
  2024年   3篇
  2023年   22篇
  2022年   26篇
  2021年   31篇
  2020年   28篇
  2019年   31篇
  2018年   22篇
  2017年   20篇
  2016年   22篇
  2015年   29篇
  2014年   65篇
  2013年   75篇
  2012年   51篇
  2011年   72篇
  2010年   66篇
  2009年   56篇
  2008年   46篇
  2007年   52篇
  2006年   58篇
  2005年   50篇
  2004年   71篇
  2003年   56篇
  2002年   34篇
  2001年   41篇
  2000年   34篇
  1999年   24篇
  1998年   11篇
  1997年   12篇
  1996年   8篇
  1995年   7篇
  1994年   7篇
  1993年   2篇
  1992年   5篇
  1990年   3篇
  1989年   5篇
  1984年   2篇
  1983年   1篇
  1982年   1篇
  1981年   2篇
  1980年   1篇
  1979年   2篇
  1978年   2篇
  1977年   2篇
  1973年   1篇
  1971年   1篇
  1966年   1篇
  1961年   1篇
  1960年   1篇
  1958年   1篇
  1956年   3篇
排序方式: 共有1170条查询结果,搜索用时 15 毫秒
31.
李箭  杨新民  蒲健 《电池》2006,36(5):396-397
Solid oxide fuel cell(SOFC)is operated in the temperaturerange of 550~1 000℃;the by-product is high quality heat andstream·It provides heat and hot water while it is generating elec-tricity,the so called combined heat and power generation(CHP)·And the …  相似文献   
32.
CAPP发展趋势及面临的问题   总被引:9,自引:1,他引:9  
阐述了CAPP的发展历程,并从不同角度对CAPP进行了分类。在分析国内外CAPP发展现状的基础上,提出了CAPP的“智能化”、“工具化”、“集成化”和“基于Internet全球化”等发展趋势。结合国内CAPP的应用现状,讨论了当前国内CAPP所面临的诸多问题:研究与开发有较大片面性;应用范围过于狭窄;对系统化、实用化、工程化研究重视不够;重表现形式,对工艺数据本身重视不够;工艺的规范化、标准化程度很低。  相似文献   
33.
分析分多媒体监控特点,认为多媒体流的QoS保证是一个重要的研究课题。提出了支持自适应QoS保证的嵌入式IP网络多媒体监控系统模型。QoS保证方案包括系统资源监测,网络带宽的预估计,借助PID算法实现多媒体自适应流的自调节,以及音频优先保证。实验表明,该模型结构简单,制定的QoS控制策略能够实时地对视音频参数进行动态调整,资源利用率高,图像传输流畅。  相似文献   
34.
This paper reviews the past, present and future of surface modification of titanium alloy from the point of view of preparation of hard tissue replacement implants. The development of titanium alloy is also described.  相似文献   
35.
Comments on the article by Sanchez and Turner (see record 2003-03405-005) examining the implications for practice and training in psychology in the era of managed care. The current author states that Sanchez and Turner should be commended. Their article amplifies and clarifies critical issues psychologists must consider while practicing within an era increasingly shaped by health insurance policies and practices. Nevertheless, the author feels that several intriguing facets of managed care were not highlighted. Discussion focuses on the impact that reimbursement and managed care is having on school (and clinical) psychologists. The author points out that it is unknown to what extent managed care may (and has) altered psychological services delivered by school psychologists. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
36.
《钢铁冶炼》2013,40(4):254-257
Abstract

The automotive industry is changing with ever increasing speed. The current economic and environmental pressures mean that the vehicles of tomorrow will be very different to those we drive today. As new technologies are developed to enable these changes, the materials industry must respond quickly to ensure that they are both manufacturable and cost effective, as well as deliver the performance required to drive the industry forward. This article aims to identify the key technology developments, the challenges that they face and how Tata Steel is helping to overcome them.  相似文献   
37.
《Ergonomics》2012,55(12):1612-1617
The present paper is a commentary on the recently published IEA strategy for human factors/ergonomics (Dul, J., et al. (2012), A strategy for human factors/ergonomics: developing the discipline and profession. Ergonomics, 55(4), 377–395). Two main issues that demand attention are: (i) the way others understand our profession and discipline, and (ii) the way we understand our profession and added value to industry. First, it is advocated that the discussion on the future of human factors/ergonomics (HFE) should be focused more on the quality of the delivered value of HFE and less on its visibility and marketing. Second, the three fundamental characteristics of HFE, as proposed in the report, are discussed and the consequences of this proposal are further developed. Arguments are put forward on the endemic epistemological vagueness within the discipline and on the optimistic definition of its aim. Finally, a proposal is made at the epistemological level, which challenges some established convictions of the discipline. It is advocated that such an epistemological evolution may be necessary if HFE is to make progress towards contributing to system performance.

Practitioner Summary: The paper is a commentary on the IEA strategy for human factors/ergonomics. Issues discussed are, the way others understand our profession and the way we understand our profession and added value to industry. Some of the established convictions of the discipline are challenged and proposals are made to overcome these.  相似文献   
38.
39.
For the United States Nuclear Regulatory Commission and the reactor licensees it regulates, there are a number of contemporary issues associated with the back end of the fuel cycle including, the agency's revision to its “Waste Confidence” decision and the path-forward for high-level waste disposal. Additionally, the 2012 Blue Ribbon Commission on America's Nuclear Future recommendations, the future of reprocessing, consolidated interim spent fuel storage, and maintaining technical competence within the NRC in challenging budgetary conditions are addressed. I conclude that there is confidence in the feasibility of safe storage of spent nuclear fuel following the licensed operational life of a reactor and any change in high-level waste policy will require Congressional action to amend the Nuclear Waste Policy Act.  相似文献   
40.
智慧城市的发展是现代城市的一个重要发展方向,本文简要介绍了我国智慧城市的发展现状,并根据现有存在的问题,讨论了未来智慧城市发展需要解决的问题和发展趋势,希望有所借鉴。  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-23

京公网安备 11010802026262号