全文获取类型
收费全文 | 145篇 |
免费 | 2篇 |
国内免费 | 3篇 |
专业分类
电工技术 | 9篇 |
综合类 | 1篇 |
化学工业 | 27篇 |
金属工艺 | 9篇 |
机械仪表 | 4篇 |
建筑科学 | 46篇 |
轻工业 | 4篇 |
水利工程 | 6篇 |
石油天然气 | 3篇 |
武器工业 | 1篇 |
无线电 | 12篇 |
一般工业技术 | 9篇 |
冶金工业 | 15篇 |
原子能技术 | 1篇 |
自动化技术 | 3篇 |
出版年
2024年 | 1篇 |
2022年 | 1篇 |
2021年 | 4篇 |
2020年 | 2篇 |
2019年 | 2篇 |
2017年 | 2篇 |
2016年 | 2篇 |
2015年 | 5篇 |
2014年 | 16篇 |
2013年 | 12篇 |
2012年 | 53篇 |
2011年 | 45篇 |
2010年 | 2篇 |
2008年 | 1篇 |
2006年 | 1篇 |
2004年 | 1篇 |
排序方式: 共有150条查询结果,搜索用时 15 毫秒
1.
This paper describes the design and application of the Atmospheric Evaluation and Research Integrated model for Spain (AERIS). Currently, AERIS can provide concentration profiles of NO2, O3, SO2, NH3, PM, as a response to emission variations of relevant sectors in Spain. Results are calculated using transfer matrices based on an air quality modelling system (AQMS) composed by the WRF (meteorology), SMOKE (emissions) and CMAQ (atmospheric-chemical processes) models. The AERIS outputs were statistically tested against the conventional AQMS and observations, revealing a good agreement in both cases. At the moment, integrated assessment in AERIS focuses only on the link between emissions and concentrations. The quantification of deposition, impacts (health, ecosystems) and costs will be introduced in the future. In conclusion, the main asset of AERIS is its accuracy in predicting air quality outcomes for different scenarios through a simple yet robust modelling framework, avoiding complex programming and long computing times. 相似文献
2.
2011年春夏季江西旱情水文分析 总被引:1,自引:0,他引:1
文章介绍了2011年春夏季江西旱情,并对未来旱涝并存的情况作了阐述. 相似文献
3.
4.
《Food Control》2014
Cadmium (Cd), lead (Pb) and arsenic (As) can enter the food chain through the environment and/or as a consequence of the manufacturing process making foodstuffs the main human exposure route to these chemical elements. The risk associated with this exposure is of such a big concern for human health that the European Food Safety Agency recommends to reduce the exposure to Cd and Pb so as to protect especially vulnerable subgroups of population (e.g., infants). Therefore, the setting of new maximum levels (MLs) for chemical elements in infant formulae (e.g., for Cd) or the reconsideration of the existing ML for Pb is under discussion. On this basis, the availability of analytical methods, precise, accurate and sensitive enough to quantify low concentration values, is a key point especially for official control laboratories that have to state the sample compliance using a fully validated method with an associated uncertainty compliant with the requirements specified in the pertinent regulations. This work describes the development and validation of an analytical method to quantify As, Cd and Pb in powdered infant formulae based on animal protein at values of concentration close to the MLs that are likely to be set. The results obtained make the method suitable for a precise and accurate determination of these chemical elements at these low concentration values. In particular, the results for limit of quantification (LoQ) were respectively (μg kg−1): As 6.2, Cd 1.2 and Pb 4.5. While for the recovery rates the following percentages were obtained: As 105%, Cd 98% and Pb 108%. The expanded uncertainties were found extremely satisfactory (Cd 13% and Pb 19%). The LoQ and the uncertainty for Pb meet the requirements set in Commission Regulation (EC) No. 333/2007 and following amendments being lower than the maximum values allowed. Even for Cd the expanded uncertainty resulted adequate in relation with the low concentration considered. 相似文献
5.
6.
Advances in computation challenge established design approaches in architecture through a much deeper integration of form generation and materialisation. Tobias Schwinn , Research Associate at the Institute for Computational Design (ICD), University of Stuttgart, and Guest-Editor Achim Menges , Director of the ICD, introduce how the potentials and constraints of robotic fabrication can now be explored as generative drivers in agent-based design. This enables architectural innovation in unison with fabricability, structural capacity and spatial performance, as demonstrated by the Landesgartenschau Exhibition Hall in Schwäbisch Gmu"nd, Germany, the world's first building with a robotically fabricated segmented timber shell as its primary structure. 相似文献
7.
为了全面准确地分析微小信号,引入基于FFT技术的三维方法,利用LabVIEW2011高级开发者工具包编程设计,实现将微小信号从一维显示转换成三维能量谱的形式。使用所设计的程序成功实现对微小信号的准确分析。采用该方法可以实现对于微小信号的全面研究。 相似文献
8.
No authorship indicated 《Canadian Metallurgical Quarterly》2011,66(5):348
The American Psychological Foundation (APF) Gold Medal Awards recognize distinguished and enduring records of accomplishment in four areas of psychology: the application of psychology, the practice of psychology, psychology in the public interest, and the science of psychology. The 2011 recipient of the Gold Medal Award for Life Achievement in the Application of Psychology is Walter C. Borman. Dorothy W. Cantor, president of the APF, will present the APF Gold Medal Awards at the 119th Annual Convention of the American Psychological Association on August 5, 2011, at 4:00 p.m. Members of the 2011 APF Board of Trustees are Dorothy W. Cantor, president; William Howell, vice president/secretary; Gerald Koocher, treasurer; Elisabeth R. Straus, executive vice president/executive director; Norman Anderson; David H. Barlow, Camilla Benbow; Sharon Stephens Brehm; Charles L. Brewer; Connie Chan; Anthony Jackson; Ronald F. Levant; Sandra Shullman; Archie L. Turner; and Kurt Geisinger, APA Board of Directors liaison. (PsycINFO Database Record (c) 2011 APA, all rights reserved) 相似文献
9.
10.