全文获取类型
收费全文 | 12052篇 |
免费 | 858篇 |
国内免费 | 491篇 |
专业分类
电工技术 | 286篇 |
技术理论 | 2篇 |
综合类 | 791篇 |
化学工业 | 1144篇 |
金属工艺 | 1305篇 |
机械仪表 | 3412篇 |
建筑科学 | 262篇 |
矿业工程 | 214篇 |
能源动力 | 168篇 |
轻工业 | 428篇 |
水利工程 | 45篇 |
石油天然气 | 199篇 |
武器工业 | 148篇 |
无线电 | 491篇 |
一般工业技术 | 2286篇 |
冶金工业 | 338篇 |
原子能技术 | 64篇 |
自动化技术 | 1818篇 |
出版年
2024年 | 50篇 |
2023年 | 339篇 |
2022年 | 415篇 |
2021年 | 658篇 |
2020年 | 542篇 |
2019年 | 424篇 |
2018年 | 334篇 |
2017年 | 432篇 |
2016年 | 379篇 |
2015年 | 357篇 |
2014年 | 588篇 |
2013年 | 1117篇 |
2012年 | 670篇 |
2011年 | 528篇 |
2010年 | 397篇 |
2009年 | 443篇 |
2008年 | 438篇 |
2007年 | 595篇 |
2006年 | 660篇 |
2005年 | 632篇 |
2004年 | 570篇 |
2003年 | 504篇 |
2002年 | 474篇 |
2001年 | 393篇 |
2000年 | 309篇 |
1999年 | 271篇 |
1998年 | 182篇 |
1997年 | 133篇 |
1996年 | 141篇 |
1995年 | 104篇 |
1994年 | 73篇 |
1993年 | 69篇 |
1992年 | 40篇 |
1991年 | 38篇 |
1990年 | 20篇 |
1989年 | 13篇 |
1988年 | 8篇 |
1987年 | 8篇 |
1986年 | 15篇 |
1985年 | 3篇 |
1984年 | 9篇 |
1983年 | 5篇 |
1982年 | 2篇 |
1981年 | 2篇 |
1980年 | 5篇 |
1979年 | 3篇 |
1959年 | 1篇 |
1957年 | 1篇 |
1955年 | 1篇 |
1951年 | 1篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
Lean philosophy: implementation in a forging company 总被引:2,自引:2,他引:0
Ajit Kumar Sahoo N. K. Singh Ravi Shankar M. K. Tiwari 《The International Journal of Advanced Manufacturing Technology》2008,36(5-6):451-462
This research addresses the implementation of lean philosophy in a forging company with a focus on radial forging production
flow lines. Here, the prime motive is to evolve and test several strategies to eliminate waste on the shop floor. In this
research, a systematic approach is suggested for the implementation of lean principles. This paper describes an application
of value stream mapping (VSM). Consequently, the present and future states of value stream maps are constructed to improve
the production process by identifying waste and its sources. Furthermore, Taguchi’s method of design of experiments is pursued
here to minimize the forging defects produced due to imperfect operating conditions. A noticeable reduction in set-up time
and work-in-process (WIP) inventory level is substantiated. Finally, we conclude with a discussion of managerial implications
and the future scope of research. 相似文献
22.
A model for preventive maintenance operations and forecasting 总被引:2,自引:1,他引:1
Equipment costs constitute the greatest majority of overall costs for semiconductor manufacturing. Therefore, maintaining
high equipment availability has been regarded as one of the major goals in the industry. The ability to forecast correctly
equipment preventive maintenance (PM) timing requirements not only can help optimizing equipment uptime but also minimizing
negative impacts on manufacturing production efficiency. This research used grey theory and evaluation diagnosis to construct
a PM forecasting model for prediction of PM timing of various machines. The results showed significant improvements of PM
timing predictions compared to the existing method based on experience and an alternative method proposed by Li and Chang
(Semiconductor Manufacturing Technology Workshop 2002: 10–11, pp. 275–277) for the same fab cases.
Received: June 2005 / Accepted: December 2005 相似文献
23.
柏玉明 《湖南冶金职业技术学院学报》2003,(2)
信息技术是一种新型技术。信息技术和制造业相互依存、相互促进是一种发展趋势。信息技术对制造业的影响主要有:信息化在制造业的产品开发设计技术方面带来的进步,这主要包括计算机辅助技术;信息化在制造业的生产管理技术方面带来的进步,主要包括企业制造资源计划系统及产品数据管理;信息化在制造业的制造方式上带来的进步,主要包括柔性制造、计算机集成制造等先进制造技术。 相似文献
24.
Lie‐Fern Hsu 《Quality and Reliability Engineering International》2007,23(2):269-272
He and Grigoryan (Quality and Reliability Engineering International 2002; 18 :343–355) formulated the design of a double‐sampling (DS) s control chart as an optimization problem and solved it with a genetic algorithm. They concluded that the DS s control charts can be a more economically preferable alternative in detecting small shifts than traditional s control charts. We explain that, since they only considered the average sample size when the process is in control, their conclusion is questionable. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献
25.
26.
NetLinx技术的发展,使得跟踪系统发生了划时代的飞跃,在制造业上的应用更加广泛。本文以一间显像管厂为例,详细介绍了跟踪系统在制造业上的应用。 相似文献
27.
Anthony Hendrikus Overmars Dario John Toncich 《International Journal of Flexible Manufacturing Systems》1994,6(4):311-331
This paper presents a critical evaluation of existing FMS architectures and the academic and industrial design and development strategies used during their formulation. The paper seeks to address the need for, and value of, existing architectures within the industrial arena. More importantly however, this paper puts forward a new two-tier distributed control architecture for FMS based upon new (real-time) networkable DSP servo control methodologies developed by one of the authors for Softronics in Australia. The ramifications of these methodologies are substantial, not only in terms of FMS control, but in the overall simplification of such systems and the development of flexible fixturing devices over the coming decade. This paper also postulates on how new FMS architectures can be developed from such technologies and details why such architectures could be more appropriate to industry needs than those that are currently in existence. 相似文献
28.
This paper looks into a new area for knowledge-based system application, that of manufacturing modelling. Manual generation of IDEF0 models of manufacturing systems is time-consuming and inconsistent. However, the process can be automated to improve timeliness and consistency. In this paper, a knowledge-based manufacturing modelling system for the automatic generation of IDEF0 models is proposed. The system will not only greatly reduce the IDEF0 modelling time but will also eliminate the inconsistency problem of conventional IDEF0 modelling systems. The paper explains the knowledge-based approach and identifies the kinds of domain knowledge that are required for the construction of the knowledge-based manufacturing modelling system. 相似文献
29.
30.
本文利用等效工作站理论和工件流平衡原理,推导出非串行离散事件生产线可以等价于串联系统,并归结为装配和拆卸两条定理,解决了系统的建模、分析与设计问题。 相似文献