全文获取类型
收费全文 | 1609篇 |
免费 | 154篇 |
国内免费 | 4篇 |
专业分类
电工技术 | 16篇 |
综合类 | 2篇 |
化学工业 | 476篇 |
金属工艺 | 15篇 |
机械仪表 | 39篇 |
建筑科学 | 58篇 |
矿业工程 | 2篇 |
能源动力 | 68篇 |
轻工业 | 279篇 |
水利工程 | 21篇 |
石油天然气 | 6篇 |
无线电 | 107篇 |
一般工业技术 | 234篇 |
冶金工业 | 81篇 |
原子能技术 | 4篇 |
自动化技术 | 359篇 |
出版年
2024年 | 10篇 |
2023年 | 29篇 |
2022年 | 81篇 |
2021年 | 108篇 |
2020年 | 62篇 |
2019年 | 78篇 |
2018年 | 87篇 |
2017年 | 89篇 |
2016年 | 108篇 |
2015年 | 66篇 |
2014年 | 89篇 |
2013年 | 140篇 |
2012年 | 112篇 |
2011年 | 143篇 |
2010年 | 74篇 |
2009年 | 73篇 |
2008年 | 77篇 |
2007年 | 64篇 |
2006年 | 56篇 |
2005年 | 38篇 |
2004年 | 26篇 |
2003年 | 21篇 |
2002年 | 33篇 |
2001年 | 8篇 |
2000年 | 8篇 |
1999年 | 13篇 |
1998年 | 16篇 |
1997年 | 12篇 |
1996年 | 14篇 |
1995年 | 7篇 |
1994年 | 3篇 |
1993年 | 5篇 |
1992年 | 1篇 |
1990年 | 1篇 |
1988年 | 2篇 |
1987年 | 2篇 |
1985年 | 3篇 |
1981年 | 2篇 |
1978年 | 1篇 |
1976年 | 3篇 |
1972年 | 1篇 |
1971年 | 1篇 |
排序方式: 共有1767条查询结果,搜索用时 15 毫秒
1.
Participating media with an inhomogeneous index of refraction make light follow curved paths. Simulating this in a global
illumination environment has usually been neglected due to the complexity of the calculations involved, sacrificing accurate
physical simulations for efficient visual results.
This paper aims to simulate non-linear media in a more reasonable time than previous works without losing physical correctness.
Accuracy is achieved by solving the Eikonal equation of geometrical optics, which describes the path followed by a light beam
that traverses a non-linear medium. This equation is used in the context of a photon mapping extension. 相似文献
2.
This study investigates the whole-body vibration exposure in kite surfing, alpine skiing, snowboarding and cycling. The vibration exposure was experimentally evaluated following the ISO 2631 guidelines. Results evidenced that the most critical axis is the vertical one. The weighted vibration levels are always larger than 2.5 m/s2 and the vibration dose values are larger than 25 m/s1.75. The exposure limit values of the EU directive are reached after 8–37 min depending on the sport. The vibration magnitude is influenced by the athletes’ speed, by their skill level and sometimes by the equipment. The large vibration values suggest that the practice of sport activities may be a confounding factor in the aetiology of vibration-related diseases. 相似文献
3.
4.
Pardo Diego Fichera Loris Caldwell Darwin Mattos Leonardo S. 《Neural Processing Letters》2015,41(1):55-69
Neural Processing Letters - This paper presents an approach to determine a model of superficial tissue temperature dynamics during continuous wave CO $$_2$$ laser irradiation. The main contribution... 相似文献
5.
6.
7.
Cáceres-Criado Irene García-Molina Diego Francisco Mesas-Carrascosa Francisco Javier Triviño-Tarradas Paula 《Virtual Reality》2023,27(2):967-983
Virtual Reality - Virtual reconstruction is defined as the visual recovery of a building or object through the creation of a three-dimensional model of the asset to be reconstructed, in a... 相似文献
8.
Journal of Intelligent Information Systems - Offline evaluation of recommender systems (RSs) mostly relies on historical data, which is often biased. The bias is a result of many confounders that... 相似文献
9.
Aitor Almeida Pablo Orduña Eduardo Castillejo Diego López-de-Ipiña Marcos Sacristán 《Personal and Ubiquitous Computing》2011,15(4):419-429
As the dependence on mobile devices increases, the need for supporting a wider range of users and devices becomes crucial.
Elders and people with disabilities adopt new technologies reluctantly, a tendency caused by the lack of adaptation of these
technologies to their needs. To address this challenge, this paper describes a framework, Imhotep, whose aim is to aid developers
in the accessible application creation process, making the creation of user-centered applications easier and faster. Our framework
allows to easily adapt the applications to the constraints imposed by the user capabilities (sensorial, cognitive, and physical
capabilities) and device capabilities by providing a repository that will manage the compilation and deployment of applications
that include a set of preprocessor directives in the source code. These directives are enhanced with concepts that are automatically
adjusted to the current trends of mobile devices by using a Fuzzy Knowledge-Eliciting Reasoner. Our final goal is to increase
the number of applications targeted to elders and people with disabilities providing tools that facilitate their development.
The paper also describes the evaluation of both the accuracy of the fuzzy terms generated for mobile devices and the usability
of the proposed platform. 相似文献
10.
Diego Castaño José Patricio Díaz Varela Antoni Torrens 《Soft Computing - A Fusion of Foundations, Methodologies and Applications》2011,15(7):1449-1455
In this paper, we show that free algebras in the variety of residuated lattices and some of its subvarieties are directly
indecomposable and show, as a consequence, the direct indecomposability of free algebras for some classes of their bounded
implicative subreducts. 相似文献