全文获取类型
收费全文 | 434篇 |
免费 | 18篇 |
国内免费 | 8篇 |
专业分类
电工技术 | 5篇 |
综合类 | 80篇 |
化学工业 | 4篇 |
金属工艺 | 1篇 |
机械仪表 | 10篇 |
建筑科学 | 123篇 |
矿业工程 | 13篇 |
能源动力 | 33篇 |
轻工业 | 8篇 |
水利工程 | 5篇 |
石油天然气 | 6篇 |
无线电 | 33篇 |
一般工业技术 | 18篇 |
冶金工业 | 14篇 |
自动化技术 | 107篇 |
出版年
2023年 | 4篇 |
2022年 | 3篇 |
2021年 | 13篇 |
2020年 | 9篇 |
2019年 | 5篇 |
2018年 | 8篇 |
2017年 | 6篇 |
2016年 | 11篇 |
2015年 | 16篇 |
2014年 | 31篇 |
2013年 | 40篇 |
2012年 | 16篇 |
2011年 | 33篇 |
2010年 | 26篇 |
2009年 | 31篇 |
2008年 | 22篇 |
2007年 | 20篇 |
2006年 | 25篇 |
2005年 | 27篇 |
2004年 | 28篇 |
2003年 | 22篇 |
2002年 | 24篇 |
2001年 | 8篇 |
2000年 | 2篇 |
1999年 | 5篇 |
1998年 | 2篇 |
1997年 | 2篇 |
1996年 | 4篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1986年 | 3篇 |
1985年 | 3篇 |
1984年 | 2篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1980年 | 1篇 |
1968年 | 2篇 |
1966年 | 1篇 |
1958年 | 1篇 |
排序方式: 共有460条查询结果,搜索用时 15 毫秒
11.
I. J. Good 《Cryptologia》2013,37(2):65-77
The head of the American contingent at Britain's Government Code and Cypher School (GC&;CS) at Bletchley during World War II tells how he got into cryptology and about his social and administrative experiences as commanding officer of the 6813 th Detachment. 相似文献
12.
结合湖南省经济特点,对当前湖南省中小企业加强标准化建设在推动新型工业化进程中的作用进行阐述,通过对现状及原因分析,提出了湖南省行政部门在推动中小企业标准化建设上的建议与对策. 相似文献
13.
Social media has flourished recently, and government agencies across different levels are experimenting with launching government social media (GSM) to socialize government services, processes, and data. Both researchers and practitioners are focusing on understanding the key success factors related to the launch of GSM. This study aims to identify the key success factors by exploring the formation mechanism of individuals' continuous usage intention. Through the theoretical lens of the uses and gratifications theory (UGT), we identify the gratification factors (i.e., information seeking, social activity, content consumption, collective intelligence, and network externality) that stimulate users' continuance intention toward GSM. Furthermore, we draw upon the stimulus–organism–response (SOR) framework to develop a model for exploring the effects of gratification factors (as stimulus in the SOR framework) on individuals' online experiential states (i.e., flow experience and sense of belonging) and, subsequently, their continuance intention. The results of our survey of 336 government microblogging residents indicate that usage continuance intention is in part determined by gratification factors. Furthermore, the associations among gratification factors and users’ continuance intention can be mediated by the sense of belonging and flow experience. 相似文献
14.
《Energy Policy》2016
In this research, we aim to understand the influence of government subsidies on enterprises’ research and development (R&D) investment behavior, particularly in China’s renewable energy sector. We are also interested in examining how the attributes of enterprise ownership act as a moderating variable for the relationship between government subsidies and R&D investment behavior. Three classical panel data analysis models including the pooled ordinary least squares (OLS) model, the fixed effect model and the random effect model are employed. We find that government subsidies have a significant crowding out influence on enterprises’ R&D investment behavior and that the influence is further moderated by the attributes of enterprise ownership. Moreover, a panel threshold regression model is used to demonstrate how the influence of government subsidies on enterprises’ R&D investment behavior will change when government subsidies increase. Two thresholds, 0.6% and 10.1%, are identified. We recommend that relevant government departments should motivate enterprise R&D investment behavioral intention by increasing subsidies within a certain range. Different attributes of enterprise ownership should also be considered as part of policy reform and re-structuring relating to government subsidies. 相似文献
15.
矿难频发的成因及对策研究综述 总被引:1,自引:0,他引:1
中国矿难频频发生,政府政策不断出台,许多学者也在不断研究。综合看来,学者的研究主要是从煤矿企业、煤矿职工、政府三个利益相关者出发,研究了煤矿企业在煤矿安全管理中的失责;煤矿职工在煤矿安全管理中的失效;政府在煤矿安全管理中的失败。 相似文献
16.
The recent plan for Amman, Jordan, combined elements of both master planning and strategic planning while pushing beyond the boundaries of both to incorporate governmental reorganization, national development concerns, and the “branding” of the city. The paper explores this deviation from traditional master planning and documents the innovations that emerged from a commitment to bring planning and implementation closer together in time and use the planning process to build planning capacity in Amman and throughout Jordan. As planners continue to negotiate between holistic visions and the pressures of development, Amman 2025 exposes the strengths and weaknesses of strategic planning and offers useful lessons. 相似文献
17.
郝亮华 《计算机光盘软件与应用》2011,(20)
电子政务发展应加强服务于民的意识,通过加强法制体系建设、综合管理、统筹规划、建设政府门户网站等手段,切实提升电子政务的公共服务水平,让百姓真正享受到电子政务带来的便利服务。 相似文献
18.
政府补助主要是对企业由于非市场因素导致的价格低于成本的一种补偿。而《企业会计准则》与《企业会计制度》对此在账务处理、报表列示不同。按照财税[2011]70号文件的规定,取得的财政性资金,同时符合条件的,可以作为不征税收入处理。 相似文献
19.
澳门特区政府总部办公室最初是一座民宅,回归前是总督府。它是澳门19世纪豪宅代表之一,见证了澳门葡式民宅由内敛到张扬的转变。同时,作为不同时期的最高权力所在地,建筑对社会及政局的发展作出相应的嬗变,影响了澳门建筑的发展。 相似文献
20.
It is not too often that sufficient similarities and comparable data enable us to make significant comparisons between the central areas of Australian capital cities. This article presents such material about Adelaide and Melbourne. In particular, it takes advantage of floorspace and employment surveys carried out in these central areas in 1987 and 1992 to identify not only trends but important points of similarity and difference. Some of the more important reasons for these changes are canvassed in the context of current literature. The different policy responses of the two state governments and central city authorities are also examined as there has been a change in both cities to a state Liberal government following Labor governments which have incurred heavy financial losses and increased state debt. 相似文献