全文获取类型
收费全文 | 82篇 |
免费 | 4篇 |
专业分类
电工技术 | 2篇 |
化学工业 | 20篇 |
金属工艺 | 2篇 |
机械仪表 | 3篇 |
建筑科学 | 1篇 |
能源动力 | 3篇 |
轻工业 | 5篇 |
石油天然气 | 1篇 |
无线电 | 12篇 |
一般工业技术 | 21篇 |
冶金工业 | 5篇 |
原子能技术 | 1篇 |
自动化技术 | 10篇 |
出版年
2022年 | 1篇 |
2021年 | 1篇 |
2020年 | 2篇 |
2019年 | 3篇 |
2018年 | 5篇 |
2017年 | 3篇 |
2016年 | 3篇 |
2015年 | 1篇 |
2014年 | 6篇 |
2013年 | 8篇 |
2012年 | 4篇 |
2011年 | 10篇 |
2010年 | 6篇 |
2009年 | 4篇 |
2008年 | 4篇 |
2007年 | 1篇 |
2006年 | 4篇 |
2005年 | 2篇 |
2004年 | 4篇 |
2003年 | 4篇 |
2002年 | 2篇 |
2000年 | 1篇 |
1997年 | 1篇 |
1996年 | 4篇 |
1995年 | 1篇 |
1994年 | 1篇 |
排序方式: 共有86条查询结果,搜索用时 0 毫秒
11.
Fluorescence spectroscopy coupled with independent components analysis to monitor molecular changes during heating and cooling of Cantal‐type cheeses with different NaCl and KCl contents 下载免费PDF全文
12.
13.
14.
Proportional integral-fractional filter controller design for first order lag plus time delay system
Kaddour Gherfi Abdelfatah Charef Hadj Ahmed Abbassi 《International journal of systems science》2019,50(5):885-904
In this work, a design approach of proportional integral-fractional filter (PI-FF) controller for first order plus time delay system (FOPTD) is proposed in order to enhance the feedback control system performance characteristics. The controller design method is drawn up such that the transfer function of the overall closed-loop system is equivalent to the transfer function of the general fractional Bagley–Torvik reference model whose behaviour ranges from relaxation to oscillation for different values of the fractional order derivative and the damping ratio-like parameter. The tuning parameters of the PI-FF controller are derived analytically from the FOPTD process model and the general fractional Bagley–Torvik reference model parameters. Illustrative examples were presented to test the effectiveness and the usefulness of the proposed PI-FF controller on the feedback control system performance characteristics enhancement. 相似文献
15.
Here we investigated low frequency AC electrophoretic deposition of TiO2 nano-particles suspended in acetone by experiment and simulation. Deposition is done under influence of a non-uniform 1 Hz AC electric field. The non-uniform electric field is generated by two parallel planar gold electrodes coated on a glass substrate. Experiment shows that during deposition, TiO2 nano-particles fill the gap between electrodes. Numerical simulation of electric field reveals the role of glass substrate on gap filling. Our model shows that existence of surface charge on the substrate between two electrodes is the reason why the TiO2 nano-particles move to the gap between two electrodes and deposit there. 相似文献
16.
Samir Benykhlef Virginie Dulong Zohra Bengharez Luc Picton Kaddour Guemra Didier Le Cerf 《Polymer International》2012,61(9):1456-1461
The paper discusses the enzymatic behaviour of a series of copolymers composed of alginate grafted with poly(ε‐caprolactone) (PCL) of various lengths and degrees of substitution. The study is focused on viscosity measurements and pyrene probe fluorescence with or without two enzymes: alginate lyase, which breaks the alginate backbone; and esterase, which breaks PCL pendent groups. Alginate lyase is inactive at pH = 3.8 and degrades quickly all copolymers at pH = 6.3. The degradation is not complete and is slowed down by the presence of PCL. Esterase degrades only copolymers with long pendent PCL groups. It has no effect on copolymers when PCL has a length of 530 g mol?1. These systems are good candidates for controlled release of drugs using an enzymatic method. Copyright © 2012 Society of Chemical Industry 相似文献
17.
Optimisation of conditions for dyeing polyester with liposome‐encapsulated CI Disperse Red 50 was performed using response surface methodology. The effects of temperature, time, and lecithin:dye ratio on the colour strength of dyed fabrics were investigated by a central composite design. The coefficient of determination, the probability value in analysis of variance, and the normality plot of residuals demonstrated sufficient significance of the proposed fitness function. It was found that the temperature and time of the dyeing cycle were effective factors in the dyeing of polyester fabrics with encapsulated dye. It was also established that the colour yield of dyed fabrics was above 25 in the case of a dyeing time of >80 min, a lecithin:dye ratio of ≤2, and a temperature of ca. 128 °C. Comparison of colour strengths produced by liposome‐encapsulated dye and commercial dye revealed that there was approximately the same build‐up on polyester. Dyeings from encapsulated CI Disperse Red 50 exhibited very similar fastness to dyeings from conventional CI Disperse Red 50. 相似文献
18.
19.
Divya J. Prakash Yajin Chen Mengistie L. Debasu Donald E. Savage Chaiyapat Tangpatjaroen Christoph Deneke Angelo Malachias Adam D. Alfieri Omar Elleuch Kaddour Lekhal Izabela Szlufarska Paul G. Evans Francesca Cavallo 《Small (Weinheim an der Bergstrasse, Germany)》2022,18(1):2105424
Reconfiguration of amorphous complex oxides provides a readily controllable source of stress that can be leveraged in nanoscale assembly to access a broad range of 3D geometries and hybrid materials. An amorphous SrTiO3 layer on a Si:B/Si1?xGex:B heterostructure is reconfigured at the atomic scale upon heating, exhibiting a change in volume of ≈2% and accompanying biaxial stress. The Si:B/Si1?xGex:B bilayer is fabricated by molecular beam epitaxy, followed by sputter deposition of SrTiO3 at room temperature. The processes yield a hybrid oxide/semiconductor nanomembrane. Upon release from the substrate, the nanomembrane rolls up and has a curvature determined by the stress in the epitaxially grown Si:B/Si1?xGex:B heterostructure. Heating to 600 °C leads to a decrease of the radius of curvature consistent with the development of a large compressive biaxial stress during the reconfiguration of SrTiO3. The control of stresses via post-deposition processing provides a new route to the assembly of complex-oxide-based heterostructures in 3D geometry. The reconfiguration of metastable mechanical stressors enables i) synthesis of various types of strained superlattice structures that cannot be fabricated by direct growth and ii) technologies based on strain engineering of complex oxides via highly scalable lithographic processes and on large-area semiconductor substrates. 相似文献
20.
In this paper, the polar representation of complex numbers is extended to complex polar intervals or sectors; detailed algorithms
are derived for performing basic arithmetic operations on sectors. While multiplication and division are exactly defined,
addition and subtraction are not, and we seek to minimize the pessimism introduced by these operations. Addition is studied
as an optimization problem which is analytically solved. The complex interval arithmetic thus defined is illustrated with
some numerical examples which show that in many applications, the polar representation is more advisable. 相似文献