全文获取类型
收费全文 | 5482篇 |
免费 | 314篇 |
国内免费 | 308篇 |
专业分类
电工技术 | 337篇 |
综合类 | 1111篇 |
化学工业 | 136篇 |
金属工艺 | 37篇 |
机械仪表 | 290篇 |
建筑科学 | 673篇 |
矿业工程 | 171篇 |
能源动力 | 40篇 |
轻工业 | 120篇 |
水利工程 | 60篇 |
石油天然气 | 130篇 |
武器工业 | 13篇 |
无线电 | 578篇 |
一般工业技术 | 329篇 |
冶金工业 | 430篇 |
原子能技术 | 10篇 |
自动化技术 | 1639篇 |
出版年
2024年 | 15篇 |
2023年 | 28篇 |
2022年 | 68篇 |
2021年 | 128篇 |
2020年 | 131篇 |
2019年 | 89篇 |
2018年 | 89篇 |
2017年 | 99篇 |
2016年 | 137篇 |
2015年 | 168篇 |
2014年 | 409篇 |
2013年 | 427篇 |
2012年 | 422篇 |
2011年 | 453篇 |
2010年 | 348篇 |
2009年 | 395篇 |
2008年 | 336篇 |
2007年 | 377篇 |
2006年 | 344篇 |
2005年 | 277篇 |
2004年 | 298篇 |
2003年 | 271篇 |
2002年 | 229篇 |
2001年 | 179篇 |
2000年 | 87篇 |
1999年 | 74篇 |
1998年 | 35篇 |
1997年 | 30篇 |
1996年 | 31篇 |
1995年 | 23篇 |
1994年 | 16篇 |
1993年 | 7篇 |
1992年 | 5篇 |
1990年 | 3篇 |
1989年 | 3篇 |
1988年 | 3篇 |
1987年 | 4篇 |
1983年 | 3篇 |
1982年 | 3篇 |
1981年 | 3篇 |
1979年 | 3篇 |
1971年 | 3篇 |
1966年 | 3篇 |
1965年 | 5篇 |
1964年 | 3篇 |
1963年 | 4篇 |
1961年 | 6篇 |
1960年 | 3篇 |
1959年 | 4篇 |
1954年 | 3篇 |
排序方式: 共有6104条查询结果,搜索用时 15 毫秒
1.
电信企业信息化的实质就是赋予电信企业精细化的企业资源整合能力,本以此认识为出发点,通过定义基本的信息化业务元素,需求参数和基本信息处理机制,构建出带有行业共性的电信企业信息化统一模型,该模型针对目前电信企业信息化中常见的和潜在的问题提供了有效的解决措施。 相似文献
2.
Myers Nicholas D.; Payment Craig A.; Feltz Deborah L. 《Canadian Metallurgical Quarterly》2004,8(3):182
This study examined reciprocal relationships between collective efficacy and team performance over a season of competition in women's intercollegiate ice hockey within weekends where the opponent was constant for 2 games. Collective efficacy beliefs within 12 teams were assessed prior to both games for at least 7 weekends. Team performance indexes produced an overall measure of performance for each game. The average influence of Saturday collective efficacy on Saturday performance was moderate and positive after controlling for Friday performance. The average influence of Friday performance on Saturday collective efficacy was small and positive after removing the influence of Friday collective efficacy from Friday performance. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
3.
耿鑫明 《机械制造与自动化》2002,(2):6-8
针对中国压铸行业的现状和存在的问题 ,以及当前的机遇和面临的挑战 ,论述了中国压铸工业进入 2 1世纪所面临的新形势及应采取的对策 相似文献
4.
Cathy Lawson Douglas C. Montgomery 《Quality and Reliability Engineering International》2006,22(8):971-984
Variation exists in all processes. Significant work has been done to identify and remove sources of variation in manufacturing processes resulting in large returns for companies. However, business process optimization is an area that has a large potential return for a company. Business processes can be difficult to optimize due to the nature of the output variables associated with them. Business processes tend to have output variables that are binary, nominal or ordinal. Examples of these types of output include whether a particular event occurred, a customer's color preference for a new product and survey questions that assess the extent of the survey respondent's agreement with a particular statement. Output variables that are binary, nominal or ordinal cannot be modeled using ordinary least‐squares regression. Logistic regression is a method used to model data where the output is binary, nominal or ordinal. This article provides a review of logistic regression and demonstrates its use in modeling data from a business process involving customer feedback. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献
5.
Friendship affects individual and organizational well-being through direct relations, social positions, and complex network structures. In this study, the authors use longitudinal data from 2 groups of master's of business administration students to increase understanding of how friendship networks develop. The authors propose and test a dynamic model in which attribute similarity facilitates dyadic friendship ties, as well as similar network centrality and social position; early friendship increases later similarity in structural position and centrality; and early structural similarity enhances the likelihood of future friendship. Findings largely supported the model, demonstrating how homophily and early social contacts can jointly shape maturing friendship networks. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
6.
讨论了现代企业的过程观经及企业过程的构成,提出了企业生产经营全过程的作业管理思想,并对全过程作业管理的基本内容进行了探讨,分析了企业过程重组和优化的驱动因素、目标和实现途径,最后概述了全过程作业管理的支撑技术。 相似文献
7.
This study aimed to better understand the impact of business trips on the traveler, the family, and the organization; to learn about maximizing the positive aspects of business travel; and to suggest measures to prevent and manage travel stress. Thirty-five business travelers (American, Israeli, and Swedish) were interviewed about the costs and benefits of their traveling, with a focus on gaining insight into coping strategies. Content analysis of the interviews showed that trips consist of 4 phases--(a) pretrip, (b) journey, (c) stay, and (d) posttrip--and that each phase is characterized by different coping strategies. Business travelers reported using proactive individual and organizational coping strategies in the pretrip phase and a combination of proactive and reactive coping strategies in the other phases. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
8.
This study provides a meta-analysis of research on the associations between relationship conflict, task conflict, team performance, and team member satisfaction. Consistent with past theorizing, results revealed strong and negative correlations between relationship conflict, team performance, and team member satisfaction. In contrast to what has been suggested in both academic research and introductory textbooks, however, results also revealed strong and negative (instead of the predicted positive) correlations between task conflict, team performance, and team member satisfaction. As predicted, conflict had stronger negative relations with team performance in highly complex (decision making, project, mixed) than in less complex (production) tasks. Finally, task conflict was less negatively related to team performance when task conflict and relationship conflict were weakly, rather than strongly, correlated. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
9.
中国3G业务的市场需求有两个方面:一是迅猛增长、规模庞大的用户群对移动语音业务的需求;二是较高收入用户群对移动数据业务的需求。3G运营商的目标市场包括大众用户对移动语音的需求、大众用户对移动数据业务的需求、企业用户对移动数据业务的需求以及批发型用户的需求等。本结合国内外移动运营商的数据业务开展状况,初步探讨了中国3G运营商的移动数据业务模式和3G业务的收入模式。 相似文献
10.
业务流程再造的核心思想是对企业的组织结构和工作方法进行“彻底地、根本性”重新设计,它对于打造企业核心竞争力具有重要的战略意义。本文结合株洲齿轮有限责任公司的实际,对企业采购业务流程的现状、思路和具体做法进行了分析研究。 相似文献