全文获取类型
收费全文 | 106篇 |
免费 | 9篇 |
专业分类
电工技术 | 1篇 |
化学工业 | 16篇 |
金属工艺 | 18篇 |
机械仪表 | 6篇 |
建筑科学 | 6篇 |
能源动力 | 4篇 |
轻工业 | 5篇 |
水利工程 | 2篇 |
石油天然气 | 1篇 |
无线电 | 3篇 |
一般工业技术 | 24篇 |
冶金工业 | 9篇 |
自动化技术 | 20篇 |
出版年
2022年 | 2篇 |
2021年 | 8篇 |
2020年 | 1篇 |
2019年 | 5篇 |
2018年 | 2篇 |
2017年 | 3篇 |
2016年 | 3篇 |
2015年 | 7篇 |
2014年 | 4篇 |
2013年 | 10篇 |
2012年 | 5篇 |
2011年 | 9篇 |
2010年 | 10篇 |
2009年 | 6篇 |
2008年 | 6篇 |
2007年 | 3篇 |
2006年 | 9篇 |
2005年 | 4篇 |
2004年 | 1篇 |
2003年 | 1篇 |
2001年 | 5篇 |
1999年 | 2篇 |
1998年 | 1篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1993年 | 2篇 |
1990年 | 1篇 |
1981年 | 1篇 |
1980年 | 1篇 |
排序方式: 共有115条查询结果,搜索用时 281 毫秒
31.
Kaan
cal Michael U. Gutmann Guido Sanguinetti Ramon Grima 《Journal of the Royal Society Interface》2022,19(192)
Estimating uncertainty in model predictions is a central task in quantitative biology. Biological models at the single-cell level are intrinsically stochastic and nonlinear, creating formidable challenges for their statistical estimation which inevitably has to rely on approximations that trade accuracy for tractability. Despite intensive interest, a sweet spot in this trade-off has not been found yet. We propose a flexible procedure for uncertainty quantification in a wide class of reaction networks describing stochastic gene expression including those with feedback. The method is based on creating a tractable coarse-graining of the model that is learned from simulations, a synthetic model, to approximate the likelihood function. We demonstrate that synthetic models can substantially outperform state-of-the-art approaches on a number of non-trivial systems and datasets, yielding an accurate and computationally viable solution to uncertainty quantification in stochastic models of gene expression. 相似文献
32.
A finite element model is presented to study the static and dynamic stability of a pre-twisted Timoshenko beam having asymmetric aerofoil cross-section subjected to an axial periodic force. The change in the effects of coupling due to centre of flexure distance from the centroid and the shear coefficient on the stability due to the pre-twist angle is considered. It is concluded from the results that the pre-twist angle has an influence on the effects of coupling and the shear coefficient. 相似文献
33.
<正>阿尔斯特图书馆和表演艺术学院坐落在比利时阿尔斯特,由一栋8000m~2的砖结构建筑和一栋引人注目的 19世纪后期的历史建筑组成。项目的名称为"乌托邦",与托马斯莫尔的著作《乌托邦》同名,这本书是由阿尔斯特市民德克马滕斯首先出版。 相似文献
34.
Abhijit Brahme Yauheni Staraselski Kaan Inal Raja K. Mishra 《Metallurgical and Materials Transactions A》2012,43(13):5298-5307
A new method for analyzing microstructure is proposed to evaluate the long-range dependence of texture. The proposed method calculates the average disorientation as a function of distance between data points as measured by electron backscatter diffraction patterns. This method gives a measure of clustering of texture and is used to evaluate accurately the effective grain size. This procedure in conjunction with Information theory is used to estimate a representative scan size for various materials. Analyses show that the optimal scan size depends on grain morphology and crystallographic texture. The results also indicate that on an average the optimal scan size needs to be 10 times the effective grain size. 相似文献
35.
Dr. Hana Prokopcová Dr. Doris Dallinger Prof. Dr. Georg Uray Hung Yi Kristal Kaan Dr. Venkatasubramanian Ulaganathan Prof. Dr. Frank Kozielski Dr. Christian Laggner Prof. Dr. C. Oliver Kappe 《ChemMedChem》2010,5(10):1760-1769
Dihydropyrimidine‐based compounds belong to the first discovered inhibitors of the human mitotic kinesin Eg5. Although they are used by many research groups as model compounds for chemical genetics, considerably less emphasis has been placed on the improvement of this type of inhibitor, with the exception of two recent studies. Dihydropyrimidines can be divided into class I (analogues that bind in the S configuration) and class II type inhibitors, which bind in the R configuration. Herein we report the synthesis and optimization of novel class II type dihydropyrimidines using a combination of in vitro and docking techniques. 相似文献
36.
High speed CNC system design. Part I: jerk limited trajectory generation and quintic spline interpolation 总被引:4,自引:0,他引:4
Kaan Erkorkmaz Yusuf Altintas 《International Journal of Machine Tools and Manufacture》2001,41(9):691
Reference trajectory generation plays a key role in the computer control of machine tools. Generated trajectories must not only describe the desired tool path accurately, but must also have smooth kinematic profiles in order to maintain high tracking accuracy, and avoid exciting the natural modes of the mechanical structure or servo control system. Spline trajectory generation techniques have become widely adopted in machining aerospace parts, dies, and molds for this reason; they provide a more continuous feed motion compared to multiple linear or circular segments and result in shorter machining time, as well as better surface geometry. This paper presents a quintic spline trajectory generation algorithm that produces continuous position, velocity, and acceleration profiles. The spline interpolation is realized with a novel approach that eliminates feedrate fluctuations due to parametrization errors. Smooth accelerations and decelerations are obtained by imposing limits on the first and second time derivatives of feedrate, resulting in trapezoidal acceleration profiles along the toolpath. Finally, the reference trajectory generated with varying interpolation period is re-sampled at the servo loop closure period using fifth order polynomials, which enable the original kinematic profiles to be preserved. The proposed trajectory generation algorithm has been tested in machining a wing surface on a three axis milling machine, controlled with an in house developed open architecture CNC. 相似文献
37.
Marco Franke Daniel Gent Florian Grieme Kaan Hatunoglu Sebastian Hühn Heiko Lewin 《Informatik-Spektrum》2008,31(3):241-248
Zusammenfassung Das Projekt LOSER entwickelt eine künstliche Intelligenz für das Sammelkartenspiel ,,Magic: The Gathering“. Da dies viele
verschiedene Teilprobleme aufweist, findet eine Vielzahl von Algorithmen Verwendung, die variabel umgesetzt werden, um Ver?nderungen
der Spielregeln angemessen zu begegnen. 相似文献
38.
Virtual CNC system. Part I. System architecture 总被引:5,自引:1,他引:4
Chi-Ho Yeung Yusuf Altintas Kaan Erkorkmaz 《International Journal of Machine Tools and Manufacture》2006,46(10):1107-1123
The paper presents a comprehensive virtual simulation model of a realistic and modular CNC system. The Virtual CNC architecture represents an actual CNC, but with modular feed drives, sensors, motors, and amplifiers. The CNC software library includes a variety of trajectory interpolation and axis control laws. Constant, trapezoidal and cubic acceleration profiles can be selected as a trajectory generation module. The control laws can be selected ranging from a simple PID to complex Pole Placement, Generalized Predictive Control or Sliding Mode Controller with friction compensation. When the Virtual CNC is assembled, its performance can be tested using frequency and time domain response analyses, which are automated. The Virtual CNC includes both analytical tuning methods for linear controllers, as well as Fuzzy Logic based expert auto-tuning system for Adaptive Sliding Mode Control. The paper includes detailed experimental verification of the Virtual CNC. 相似文献
39.
40.
Salep samples obtained from 10 different Orchidaceae spp., namely Dactylorhiza osmanica var. osmanica, Ophrys mammosa, Orchis anatolica, Orchis coriophora, Orchis italica, Orchis morio, Orchis palustris, Orchis simia, Orchis tridentata and Serapias vomeracea ssp. orientalis, in Anatolia, were analyzed for moisture, glucomannan, starch, protein, ash contents, pH and viscosity values. Depending on the species, the samples showed statistically significant differences in glucomannan, starch and viscosity values. It was observed that the salep samples obtained from the tubers of O. italica, O. morio, O. anatolica and O. tridentata and S. vomeracea ssp. orientalis, respectively, had higher glucomannan contents and viscosities. To ensure a supply of high-quality salep, the uncontrolled collection of tubers from the wild, especially the species O. italica, O. morio and O. anatolica, should be prevented, and research into methods of cultivation should be carried out. 相似文献