全文获取类型
收费全文 | 499篇 |
免费 | 19篇 |
国内免费 | 8篇 |
专业分类
电工技术 | 1篇 |
综合类 | 54篇 |
化学工业 | 10篇 |
机械仪表 | 3篇 |
建筑科学 | 108篇 |
矿业工程 | 1篇 |
轻工业 | 36篇 |
水利工程 | 1篇 |
石油天然气 | 1篇 |
无线电 | 6篇 |
一般工业技术 | 25篇 |
冶金工业 | 257篇 |
自动化技术 | 23篇 |
出版年
2024年 | 3篇 |
2023年 | 10篇 |
2022年 | 9篇 |
2021年 | 8篇 |
2020年 | 9篇 |
2019年 | 7篇 |
2018年 | 5篇 |
2017年 | 12篇 |
2016年 | 6篇 |
2015年 | 16篇 |
2014年 | 27篇 |
2013年 | 21篇 |
2012年 | 29篇 |
2011年 | 52篇 |
2010年 | 53篇 |
2009年 | 41篇 |
2008年 | 41篇 |
2007年 | 32篇 |
2006年 | 27篇 |
2005年 | 22篇 |
2004年 | 24篇 |
2003年 | 15篇 |
2002年 | 13篇 |
2001年 | 14篇 |
2000年 | 1篇 |
1999年 | 1篇 |
1996年 | 2篇 |
1995年 | 2篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1987年 | 2篇 |
1985年 | 1篇 |
1981年 | 2篇 |
1976年 | 1篇 |
1973年 | 2篇 |
1972年 | 1篇 |
1963年 | 2篇 |
1961年 | 2篇 |
1959年 | 1篇 |
1958年 | 1篇 |
1957年 | 2篇 |
1956年 | 3篇 |
1955年 | 1篇 |
1954年 | 1篇 |
排序方式: 共有526条查询结果,搜索用时 31 毫秒
1.
布傣族群是古骆越人的后裔,属于壮族的一个支系,是中国与越南的跨境民族。“长袍黑衣”是布傣族群女子演奏天琴时所穿着的服饰,地域性特色鲜明,与其他壮族支系有较大的区别;服饰款式与制作工艺独特,具有较强的民族文化内涵和较高的艺术审美价值。通过实地考察调研后,解析了“长袍黑衣”服饰的款式特点及形成原因,阐释了布傣族群的服饰文化。在全球化语境下,如何挖掘布傣族群服饰的特色与价值,传承、弘扬民族文化,有待关注与更深入的探讨。 相似文献
2.
R. Voegeli J. Gierschendorf B. Summers A. V. Rawlings 《International journal of cosmetic science》2019,41(5):411-424
Dry skin is one of the most important concerns of consumers worldwide. Despite huge efforts over several decades, the personal care industry still does not offer a perfect solution to satisfy the unmet needs of consumers for moisturising treatments in different ethnic groups. The paucity of data for the underlying cellular and biochemical problems in, and the effects of moisturisers on photodamaged facial skin may partly explain this. Mainly, single point measurements are used to understand the effects of products on skin physiology even on surrogate skin sites such as the non‐photodamaged volar forearm. Some groups have developed discontinuous facial maps of skin biophysical properties, however, in 2014 a continuous facial analysis of bio‐instrumental evaluations was developed using a heat map approach. These maps enabled a continuous visualization of features that not only revealed an unexpected complexity of facial skin but also indicated that use of surrogate skin sites for facial skin is inappropriate. We have demonstrated that remarkable gradients of skin hydration, TEWL, skin surface pH and sebum exist within short distances across the face and the gradients are distinctive among different ethnic groups. In addition, these studies have demonstrated that darkly‐pigmented individuals do not necessarily have a better skin barrier function than their less‐pigmented counterparts and that Caucasians have a lower facial skin surface pH compared with more pigmented subjects. Overall, there are no correlations between capacitance, TEWL and skin surface pH including individual topology angle values. Novel 3D camera approaches have also been used to facilitate a more precise assignment of measurement sites and visualisation. The 3D facial colour mappings illustrated precisely the local moisturising effects of a moisturising cream. There were subtle ethnic differences in efficacy that may be related to underlying skin biochemistry and/or ethnic differences in product application. A placebo‐controlled study using conductance measurements in Chinese subjects is also reported. Finally, a new whole face statistical approach has been taken to prove differences in skin parameters but also of moisturiser treatment that adds further to our understanding of the ethnic differences in skin physiology and product application. This paper reviews the background of the development and application of this methodology. 相似文献
3.
4.
Evidence of racialised inequalities in housing in England has been accumulating for more than 40 years. While recognising the strengths and importance of this evidence base, this paper identifies a fundamental gap in current understanding of minority ethnic housing situations and experiences; the failure of analysis to acknowledge and understand the extent to which situations and experiences vary between places. Few studies have been sensitive to the particulars of minority ethnic housing experiences in different locations and those that have tend to have focused on the same small number of major towns and cities. Small town and rural experiences have remained largely invisible, despite increasing numbers of minority ethnic households living beyond the multi-ethnic metropolis. This paper recognises and responds to this situation by venturing beyond the current evidence base to explore the neglected housing experiences of minority ethnic people in small town England. Two key points are asserted. First, that minority ethnic people living in small towns encounter many of the same housing inequalities as their counterparts in metropolitan England. Second, that small town England presents a series of unique challenges demanding distinct responses and resulting in experiences very different to those recognised within the existing evidence base. 相似文献
5.
渝东南传统聚落景观是武陵山区土家族苗族文化生态的重要保护对象。该地区独特的山地环境和复杂的民族构成是探究聚落景观生成机制的关键。采用定性与定量结合的研究方法,分别从生态、生产、聚落和宅屋4个层次选取传统聚落景观的关键特征要素,结合GIS空间统计分析与形态分析的方法手段,总结归纳出受地理与民族双重影响下的渝东南传统聚落景观特征:1)受北高南低的自然地貌差异影响,传统聚落在区域尺度上呈现出北靠山居、南临水体的景观特征;2)受民族互动的影响,不同民族传统聚落景观呈现汉族聚落位于交通便利的溪河两岸,土家族聚落位于溪河两岸与浅丘地带,苗族聚落位于后山“溪里”的族群景观分异;3)传统聚落景观在聚落尺度上受地理与民族双重影响而呈现出差异化的特征,地理要素主要作用于生态、生产与聚落景观层次,民族要素主要作用于聚落与宅屋景观层次,并呈现出“从区隔到融合”的发展规律。渝东南传统聚落景观特征及其生成机制的挖掘为武陵山区文化生态保护提供了实证依据与支撑,可为构建西南山地多民族文化生态体系提供一个区域性的参照。 相似文献
6.
“近代建筑”指的是伴随着十八、九世纪以来工业生产而出现的新形式的建筑。建筑形式要满足新功能,运用新技术,又要符合民族审美观念。现今,民族形式逐渐成为近代建筑创作的新命题。中国近代建筑的民族形式经历了不同的发展阶段,从一开始立足于如何继承旧形式,改造旧形式,最终以新形式取代旧形式。现在对民族形式的探索,不但要注意传统建筑外部的形式特征,同时也注意研究民族形式内在的美学特征。 相似文献
7.
8.
It is well-accepted that firms locate in clusters to benefit from spillover effects from similar firms in the location. However, some firms choose to locate in multiple clusters. In this paper, we focus on the phenomenon of multi-cluster presence. Through an empirical investigation of 95 firms from the information technology enabled service industry within India, we analyze the drivers of membership across multiple clusters. Our findings indicate first that firms that are located in lower density clusters show a tendency to locate in a larger number of clusters. Second, firms that are looking for people-based creative capabilities also tend to locate in a larger number of clusters. Finally, the firms that are not founded at the location of ethnic origin of the founder CEO also tend to locate in a larger number of clusters. 相似文献
9.
10.