首页 | 本学科首页   官方微博 | 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   436篇
  免费   16篇
  国内免费   8篇
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
  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 328 毫秒
451.
在日本福岛核电站事故、德瑞意永久弃核,全球气候不断恶化的背景下,发展可再生能源受到各国前所未有的重视。我国政府在国家能源安全中长期发展规划中,对发展可再生能源做了长远规划,特别是光伏发电应用领域。所以梳理未来(5-10)年国内外光伏发电领域投资的市场前景和支持该领域的政策、法规,能帮助投资者从宏观上决策是否机投资该领域,总结国内外在光伏发电应用领域的成功经验,能有效指导政府制定更加符合本国的能源发展政策,具有非常重要的现实意义。  相似文献   
452.
唐代衙署园林--崇州罨画池   总被引:4,自引:0,他引:4  
廖嵘  侯维 《中国园林》2004,20(10):11-18
考证崇州罨画池从唐代衙暑园林--东亭,至两宋时期的罨画池,以及明清以后增建陆游祠和文庙的历史沿革,首次确认了罨画池的开凿年代,并证明历史上西湖、东湖、罨画池实为一物.分析了罨画池的发展过程及其造园艺术的独特性.  相似文献   
453.
Singapore provides analysts with the opportunity to examine possible systemic consequences of universal home ownership, which it has achieved through the sale of public housing. One important systemic problem is the need to preserve and/or enhance prices of older existing flats. This article examines the various strategies used by the Singapore government to solve the problem, especially when resale used flats are more expensive than the new, subsidized flats purchased directly from the state provider. It further examines the limits of each of the strategies in view of changing social and economic circumstances as Singapore enters the state of a mature capitalist economy and society burdened with structural unemployment and declining birth rates. The effectiveness of managing these issues will affect the legitimacy of the ruling government.  相似文献   
454.
进入存量规划时代,城市更新为主 的城市规划将面向更加复杂的研究对象,从 物质空间规划转向到主体与物质空间相互 叠加的“社会+物质”空间规划。城市规划 公众参与作为协调多元主体需求和意愿的平 台和手段,变得越来越重要。以北京旧城保 护区更新实践的为研究对象,划分为政府主 导型更新和社区主导型更新两种模式,选 取四个典型案例,参考政治科学和政策科学 理论,将公众参与过程看作一个政治互动过 程,建构多主体博弈系统模型,研究不同价 值取向的多主体及其博弈过程,进而对其公 众参与系统进行对比分析与总结,并提出城 市旧城更新中公众参与的改进建议。  相似文献   
455.
本文介绍了日本公营住宅的申请资格、入住程序、退居时的要求、建造标准等制度方面的规定。并以日本新舄市市营住宅为例,对住宅小区的分布与规模、住宅楼及户型平面的特征随年代推移的发展变化等进行了分析。在此基础上,从制度和住宅小区规划设计两方面提出了对我国廉租住房建设的几点建议。  相似文献   
456.
义乌在开发城市重点项目的同时,启动相关城中村的改造工程;对城中村实行就地、就近改造;改造后形成的新村中的业主,将他们的新房改作经营用房。通过这样的途径,新村从空间形态到经济运行迅速融入城市。义乌这种特点鲜明的城中村改造模式,从形成到成型、优化,经历了三个发辰盼段。  相似文献   
457.
While texts are the primary carriers of information for government decision making, few studies have examined the role of textual complexity in government-citizen communication. Using a variety of natural language processing methods, this paper measured textual complexity from the perspectives of word complexity, logical complexity, and abnormal negative emotion based on the textual data of the 1.15 million online messages left by the citizens to government leaders on China’s online public service platform, and explored its impact on government responses. Based on the Double-hurdle model, this paper found that the government response can be composed of two decision-making processes: response-intention, which indicates whether to respond, and response-level, which represents the extent of response. For response-intention decision-making, the simpler the words and logic of the message, the more likely it is to receive a reply from the government. For response-level decision-making, messages with more complex words and logic received a higher level of government response. Abnormal negative emotion in the message significantly reduced the government’s response intention and response level, and the negative effect of abnormal negative emotion on response intention was much greater than on the response level. This study not only helps to understand how the government makes decisions based on textual information, but also has important value for responsive government construction and equalization of government services.  相似文献   
458.
Social media speeds up government information transmission between government agencies and citizens. Drawing on Elaboration Likelihood Model and Cognitive Fit Theory, we use cSEM package of R to examine how central information structure, peripheral information structure and information style influence the diffusion of government microblogs. We also explore how information topic moderates the main effects above. Analyzing data (n = 15,151) collected from six local government microblog accounts in China, we find that central information structure, peripheral information structure and information style indeed influences the diffusion of government microblogs. More importantly, our results show that government information topic (people’s livelihood - vs non-livelihood) plays a significant moderating role in the diffusion of government microblogs. The findings contribute significant and intriguing insights to the research and practice in government information dissemination.  相似文献   
459.
环境安全规划设计无疑是舒缓城市治 安管理压力的有效途径,然而我国城市建设对 安全规划设计的关注较少。通过对国际基于政 府犯罪预防策略主导的社区环境安全规划设计 经验的剖析,提炼不同国家应用安全规划策略 的共性特点。从犯罪预防法规政策、国家预防 犯罪委员会的统筹作用、城市规划部门职能、公 众参与设计4个方面,梳理并介绍北美、英国、 北欧、东亚等多个国家和地区环境安全规划设 计实践的经验,以期为我国城市规划设计预防 犯罪工作提供有益参考借鉴。针对我国层级式 公共安全管理的效能衰减和损耗问题,本研究 拟从制定多层级的犯罪预防法规政策、建立国 家预防犯罪委员会、确定城市规划部门的预防 犯罪职能、提倡多方合作和公众参与4个方面, 总结国际经验对我国环境安全规划设计实践的 有益启示和借鉴。  相似文献   
460.
In the recent world of catastrophe, scholars and policymakers have empirically examined the influence of various economic and financial instruments on environmental quality. Still, the literature is limited in terms of displaying the factors affecting public health, particularly in case of China. This study aims is to examine the nexus between green electricity, government efficiency, and health issues to draw novel policies. The current study investigates role of electricity production, eco-innovation and institutional factors for overall public health in China using the data from 2000Q1-2021Q4, which is a novel contribution to the existing literature. For empirical analysis, the study employs cointegration analysis, quantile regression and fully modified ordinary least square methods. The empirical result found the validity of the long-run equilibrium relationship. However, the asymmetric distribution of all variables allows this study to use a non-parametric “quantile regression” approach. The empirics depicts that economic growth and renewable electricity production positively influence public health–increase health-related issues. On the contrary, eco-innovation and government effectiveness substantially reduces public health issues. The empirical results are authenticated by the applying three parametric approaches – fully modified ordinary least square, canonical cointegration regression, and dynamic ordinary least square. To explore the causal connection between the variables, this study uses granger causality test – validates the presence of unidirectional and bidirectional causalities between variables. This study suggests enhancement in government effectiveness, expenditure, and eco-innovation to reduce critical health issues in the country.  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