全文获取类型
收费全文 | 187篇 |
免费 | 7篇 |
国内免费 | 3篇 |
专业分类
电工技术 | 3篇 |
综合类 | 31篇 |
化学工业 | 9篇 |
金属工艺 | 1篇 |
机械仪表 | 2篇 |
建筑科学 | 32篇 |
矿业工程 | 2篇 |
能源动力 | 14篇 |
轻工业 | 10篇 |
水利工程 | 4篇 |
石油天然气 | 26篇 |
武器工业 | 2篇 |
无线电 | 4篇 |
一般工业技术 | 6篇 |
冶金工业 | 15篇 |
原子能技术 | 16篇 |
自动化技术 | 20篇 |
出版年
2022年 | 6篇 |
2021年 | 2篇 |
2020年 | 2篇 |
2019年 | 3篇 |
2018年 | 7篇 |
2017年 | 1篇 |
2016年 | 3篇 |
2015年 | 9篇 |
2014年 | 17篇 |
2013年 | 12篇 |
2012年 | 8篇 |
2011年 | 12篇 |
2010年 | 15篇 |
2009年 | 6篇 |
2008年 | 9篇 |
2007年 | 7篇 |
2006年 | 16篇 |
2005年 | 5篇 |
2004年 | 5篇 |
2003年 | 5篇 |
2002年 | 7篇 |
2001年 | 7篇 |
2000年 | 9篇 |
1999年 | 7篇 |
1998年 | 3篇 |
1997年 | 1篇 |
1996年 | 2篇 |
1995年 | 1篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1981年 | 4篇 |
1965年 | 1篇 |
1963年 | 1篇 |
1960年 | 1篇 |
排序方式: 共有197条查询结果,搜索用时 15 毫秒
121.
大学俄语多媒体教学较之传统教学模式具有明显的优势,但是在具体的教学实践中却存在着诸如教学内容被淡化、弱化学生的思维、忽略本校学情、影响课堂互动等问题。本文分析了大学俄语多媒体教学的优越性及存在的问题,并提出了提升高校多媒体课堂教学效率的几点建议。 相似文献
122.
123.
124.
Daniela Fabricius 《Architectural Design》2012,82(5):42-49
Across the world, the force of the ordinary is being felt. Needs must means that the majority of new urban development globally is driven by the settlement and actions of the poorest city dwellers. Where formal provision is not made for infrastructure, people are providing for themselves. Daniela Fabricius looks at how the impact of collective action by ‘ordinary’ people on the city might be assessed architecturally in cities as politically and geographically as diverse as Lima, Manila, Mumbai, Rio de Janeiro, Tehran and Mexico City. 相似文献
125.
本文介绍了室韦古镇的概况,分析了古镇现有的保护措施及面临的问题,提出了古镇的保护和发展建议,以充分发挥古镇的旅游资源,使古镇成为一个繁荣的历史活化石。 相似文献
126.
埃尔·里希茨基是苏俄前卫艺术最杰出的代表之一.他为前苏联设计了大量展览装置和宣传作品并推动至上主义艺术发展.他的作品极大地影响了德国包豪斯以及构成主义运动.里希茨基的整个职业生涯都与他的个人信仰"艺术家将成为变革社会的力量"相关. 相似文献
127.
康斯坦丁·梅尔尼科夫是一位苏俄建筑师及画家。他的建筑作品主要创作于十年之间(即1923年至1933年),令他跻身成为20世纪20年代后期前卫建筑运动的前沿。尽管他属于构成主义阵营。梅尔尼科夫却是一位特立独行的艺术家。他不受任何风格流派或艺术团体的规则所束缚。 相似文献
128.
介绍了俄罗斯奶牛的发展状况、奶牛单产和奶产量、乳品企业的发展现状、乳制品的种类和生产现状以及俄罗斯乳制品的进出口贸易概况,总结了俄罗斯乳品行业存在的一些问题。并结合我国特点对我国乳品的研发与改进、丰富我国的乳制品的产品种类等方面给予了合理性的建议。 相似文献
129.
Vadim Zakirov Author Vitae Vladimir Pavshook Author Vitae 《Nuclear Engineering and Design》2011,241(5):1529-1537
The paper introduces recent Russian nuclear electric propulsion (NEP) concept for space exploration. The concept advantages are listed along with future missions. The current development status for the two main enabling technologies is presented and the feasibility analysis of the up-to-date experience is performed. The main features of NEP concept are discussed. Revision of these features and available technologies demonstrates that the NEP concept is a logical continuation of the previous efforts by the former Soviet Union. Because no breakthrough technologies are needed for NEP development while the existing technologies only need to be adapted to the megawatt (MW) class NEP the development is considered technically feasible, low risk program likely to succeed unless cancelled by the listed non-technical reasons. Successful NEP space vehicle development is going to bring practical space exploration of solar system to the new level as well as require supplementary payload program, supporting monitoring and communication radar networks. Nuclear safety during future NEP missions can be ensured by adherence to the United Nations guidelines in the same way it was done during the Soviet Topaz Nuclear Power System (NPS) missions. 相似文献
130.
Akbar Arabhosseini Sudhakar Padhye Teris A van Beek Anton JB van Boxtel Willem Huisman Maarten A Posthumus Joachim Müller 《Journal of the science of food and agriculture》2006,86(15):2543-2550
The effect of hot air‐drying on the essential oil constituents and yield in French and Russian tarragon (Artemisia dracunculus L.) leaves was studied. The tarragon leaves were dried at air temperatures ranging from 40 to 90 °C. The drying stopped when the moisture content of the samples reached 10% or for some of the treatments reached 7, 20 and 30%. The essential oil of the fresh and dried leaves was isolated by hydrodistillation and analysed by capillary gas chromatography and gas chromatography–mass spectrometry. The decrease of oil during the drying process was highest at 60 °C drying temperature. For French tarragon the decrease in the amount of oil was significantly lower at 90 °C. The effect of the relative humidity of the drying air at each temperature was not significant. The main compounds were estragole in French tarragon (69%) and sabinene in Russian tarragon (40%). The drying process changed the relative percentage of the constituents in the oil; for instance, the relative percentages of estragole decreased and sabinene increased in French tarragon. Copyright © 2006 Society of Chemical Industry 相似文献