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   75篇
  免费   3篇
管理学   5篇
民族学   1篇
人口学   1篇
丛书文集   5篇
理论方法论   2篇
综合类   46篇
社会学   16篇
统计学   2篇
  2023年   2篇
  2022年   2篇
  2020年   3篇
  2017年   2篇
  2016年   1篇
  2015年   3篇
  2014年   6篇
  2013年   7篇
  2012年   3篇
  2011年   5篇
  2010年   2篇
  2009年   9篇
  2008年   6篇
  2007年   2篇
  2006年   2篇
  2005年   3篇
  2004年   1篇
  2003年   1篇
  2002年   1篇
  2001年   2篇
  2000年   5篇
  1999年   1篇
  1997年   1篇
  1996年   2篇
  1995年   3篇
  1994年   1篇
  1989年   1篇
  1987年   1篇
排序方式: 共有78条查询结果,搜索用时 15 毫秒
1.
介绍了对陶土坩埚玻璃拉丝机加装红外测控仪的原理、方法及试用效果。  相似文献   
2.
低阻ITO玻璃的制造工艺   总被引:2,自引:0,他引:2  
有机发光显示器件是目前平板显示中的热点,所用ITO玻璃比液晶显示所用的有更高更严的要求。该文探讨了OLED用ITO玻璃生产的相关工艺,得出使用直流溅射ITO陶瓷靶时,较好的气氛是低氩微氧,功率约200W左右,溅射时基板温度约250℃,高温无氧退火。得到方阻20?以下、平均透过率大于80%的ITO玻璃。  相似文献   
3.
Assessing exposures to hazards in order to characterize risk is at the core of occupational hygiene. Our study examined dropped ceiling systems commonly used in schools and commercial buildings and lay‐in ceiling panels that may have contained asbestos prior to the mid to late 1970s. However, most ceiling panels and tiles do not contain asbestos. Since asbestos risk relates to dose, we estimated the distribution of eight‐hour TWA concentrations and one‐year exposures (a one‐year dose equivalent) to asbestos fibers (asbestos f/cc‐years) for five groups of workers who may encounter dropped ceilings: specialists, generalists, maintenance workers, nonprofessional do‐it‐yourself (DIY) persons, and other tradespersons who are bystanders to ceiling work. Concentration data (asbestos f/cc) were obtained through two exposure assessment studies in the field and one chamber study. Bayesian and stochastic models were applied to estimate distributions of eight‐hour TWAs and annual exposures (dose). The eight‐hour TWAs for all work categories were below current and historic occupational exposure limits (OELs). Exposures to asbestos fibers from dropped ceiling work would be categorized as “highly controlled” for maintenance workers and “well controlled” for remaining work categories, according to the American Industrial Hygiene Association exposure control rating system. Annual exposures (dose) were found to be greatest for specialists, followed by maintenance workers, generalists, bystanders, and DIY. On a comparative basis, modeled dose and thus risk from dropped ceilings for all work categories were orders of magnitude lower than published exposures for other sources of banned friable asbestos‐containing building material commonly encountered in construction trades.  相似文献   
4.
Analyses of data from the 2000 US Census show that the gender pay gap differs by sector of employment and according to the part of the earnings distribution that is considered. The gender pay differential in the private sector in the US does not display either the glass ceiling or sticky floor effects that have been reported for many other countries. The government sector is, however, characterized by a distinct sticky floor effect in the female–male pay differential. Regardless of the sector of employment, females have lower hourly rates of pay than men across the entire earnings distribution.
Paul W. MillerEmail:
  相似文献   
5.
This article critically explores the working lives and views of disabled senior staff working in UK organisations. The qualitative research at the core of the article establishes that some disabled people are confounding established notions of disabled people only working in peripheral employment roles by exploring the working lives and perceptions of disabled managers. The findings do, however, point to continued barriers to what disabled staff in senior positions can be seen to do and be organisationally. Here both practical and ontological risk inheres in organisationally induced change, openness about impairment and risky identities. Such ideas, it is argued, present limits to further promotion and workplace inclusion for some disabled managers.  相似文献   
6.
“满洲窗”是广东民间在清朝中后期至抗日战争前以广州为中心的珠江三角洲直至岭南的一些私家园林、民居及商住类建筑中比较常见的建筑装饰花窗的俗称.与常说的岭南传统建筑装饰元素三雕(木、砖、石)两塑(灰塑、陶塑)相比,“满洲窗”和两塑更加专属岭南.“满洲窗”的形成、发展其实是从一个侧面研究广州、岭南乃至中国进入近现代以来传统建筑文化与外来文化的融合及变革的过程.  相似文献   
7.
通过对近现代建筑玻璃幕墙的产生和发展变化的研究,在深入细致地研究建筑所用的金属和玻璃的前提下,按着时间顺序,探讨建筑技术和艺术对早期玻璃幕墙的产生和发展变化的影响。  相似文献   
8.
金融危机改变了我国的玻璃业的发展形势。在剖析危机给我国玻璃业带来的发展机遇和挑战的基础上,系统分析后经济危机时期国际国内环境发展形势和我国玻璃行业发展的特点,提出从战略定位、技术创新、行业结构调整、产品升级、资源利用和延长产业链等方面加快我国玻璃业保持可持续快速发展的建议和对策。  相似文献   
9.
利用两片玻璃片加热软化而发生粘接的实验,成功地进行了玻璃烧结特征温度的测量。报告了实验中双片的粘接过程及现象。  相似文献   
10.
Abstract

Conclusions of sample surveys dealing with matters of privacy are often disputed. Many people either refuse to participate or provide false answers. Indirect questioning techniques are designed so that reliable estimates can be produced while the privacy of the participants is protected. One such method, the Item Count Technique is gaining increasing popularity. However, the original version of the method does not fully protect the privacy of the participants. In this paper we propose a new version of the technique which better protects the privacy of the respondents and does not have the so-called floor and ceiling effects.  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