全文获取类型
收费全文 | 129370篇 |
免费 | 12608篇 |
国内免费 | 6601篇 |
专业分类
电工技术 | 8500篇 |
技术理论 | 9篇 |
综合类 | 9486篇 |
化学工业 | 20999篇 |
金属工艺 | 7227篇 |
机械仪表 | 8484篇 |
建筑科学 | 9865篇 |
矿业工程 | 4220篇 |
能源动力 | 3925篇 |
轻工业 | 10665篇 |
水利工程 | 2393篇 |
石油天然气 | 7711篇 |
武器工业 | 1159篇 |
无线电 | 14389篇 |
一般工业技术 | 14804篇 |
冶金工业 | 5903篇 |
原子能技术 | 1279篇 |
自动化技术 | 17561篇 |
出版年
2024年 | 739篇 |
2023年 | 2627篇 |
2022年 | 4867篇 |
2021年 | 6388篇 |
2020年 | 4627篇 |
2019年 | 3835篇 |
2018年 | 4289篇 |
2017年 | 4613篇 |
2016年 | 3927篇 |
2015年 | 5520篇 |
2014年 | 6785篇 |
2013年 | 7804篇 |
2012年 | 8785篇 |
2011年 | 9409篇 |
2010年 | 8098篇 |
2009年 | 7740篇 |
2008年 | 7443篇 |
2007年 | 6994篇 |
2006年 | 6671篇 |
2005年 | 5771篇 |
2004年 | 4046篇 |
2003年 | 3690篇 |
2002年 | 3665篇 |
2001年 | 3109篇 |
2000年 | 2740篇 |
1999年 | 2684篇 |
1998年 | 2126篇 |
1997年 | 1728篇 |
1996年 | 1645篇 |
1995年 | 1394篇 |
1994年 | 1128篇 |
1993年 | 852篇 |
1992年 | 642篇 |
1991年 | 500篇 |
1990年 | 379篇 |
1989年 | 287篇 |
1988年 | 262篇 |
1987年 | 170篇 |
1986年 | 143篇 |
1985年 | 105篇 |
1984年 | 72篇 |
1983年 | 45篇 |
1982年 | 60篇 |
1981年 | 39篇 |
1980年 | 46篇 |
1979年 | 22篇 |
1977年 | 7篇 |
1976年 | 8篇 |
1975年 | 5篇 |
1951年 | 10篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
Correlation between instrumental texture and colour quality attributes with sensory analysis of selected cheeses as affected by fat contents
下载免费PDF全文
![点击此处可从《International Journal of Food Science & Technology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
A. Półtorak J. Wyrwisz M. Moczkowska M. Marcinkowska‐Lesiak A. Stelmasiak U. Ulanicka M. Zalewska A. Wierzbicka Da‐Wen Sun 《International Journal of Food Science & Technology》2015,50(4):999-1008
This study evaluated several physical and sensory parameters of different types of cheese available in the Polish market. The measurements of textural properties were conducted in an Instron universal testing machine, while the colour properties of cheeses were measured using a Minolta chromameter. The chemical composition was determined by means of the near‐infrared spectroscopy (NIRs). Moreover, a trained sensory panel was invited to assess the cheese texture‐related properties. Generally, cheeses with reduced fat content were characterised by higher hardness, adhesiveness, cohesiveness and elasticity. Texture‐related parameters of cheese with canola oil were comparable to that of most of full‐fat cheeses. The correlation analysis between physical and sensory attributes related to cheese textural properties indicated the potential applications of TPA, shear and penetration tests (r = 0.766, r = 0.75 and r = 0.765, respectively) for the evaluation of sensory properties related to the hardness. Meanwhile, the elasticity of cheese obtained from sensory evaluation was strongly correlated with the elasticity determined from the shear test (r = 0.722) and moderately correlated with the elasticity from penetration test (r = 0.588), indicating a need to refine the method of penetration test. In addition, cheeses exhibited higher meltability during convection heating at 230 °C than microwave heating. The values of meltability for cheese with reduced fat content were lower than those of full‐fat cheese. 相似文献
82.
83.
Neural Processing Letters - The beta processes (BP) is a powerful nonparametric tool in feature learning, which is often used as the prior of Bernoulli process for choosing features from a feature... 相似文献
84.
85.
86.
87.
88.
89.
This paper considers a novel distributed iterative learning consensus control algorithm based on neural networks for the control of heterogeneous nonlinear multiagent systems. The system's unknown nonlinear function is approximated by suitable neural networks; the approximation error is countered by a robust term in the control. Two types of control algorithms, both of which utilize distributed learning laws, are provided to achieve consensus. In the provided control algorithms, the desired reference is considered to be an unknown factor and then estimated using the associated learning laws. The consensus convergence is proven by the composite energy function method. A numerical simulation is ultimately presented to demonstrate the efficacy of the proposed control schemes. 相似文献
90.