全文获取类型
收费全文 | 54篇 |
免费 | 8篇 |
专业分类
综合类 | 2篇 |
化学工业 | 20篇 |
金属工艺 | 1篇 |
机械仪表 | 4篇 |
建筑科学 | 2篇 |
能源动力 | 3篇 |
无线电 | 6篇 |
一般工业技术 | 12篇 |
冶金工业 | 2篇 |
自动化技术 | 10篇 |
出版年
2023年 | 1篇 |
2022年 | 6篇 |
2021年 | 4篇 |
2020年 | 2篇 |
2019年 | 2篇 |
2018年 | 2篇 |
2017年 | 5篇 |
2016年 | 3篇 |
2015年 | 1篇 |
2014年 | 6篇 |
2013年 | 6篇 |
2012年 | 1篇 |
2011年 | 4篇 |
2010年 | 2篇 |
2009年 | 1篇 |
2008年 | 2篇 |
2007年 | 3篇 |
2006年 | 1篇 |
2005年 | 2篇 |
2004年 | 2篇 |
2003年 | 1篇 |
2002年 | 1篇 |
1999年 | 2篇 |
1998年 | 1篇 |
1985年 | 1篇 |
排序方式: 共有62条查询结果,搜索用时 0 毫秒
1.
The specifics of business intelligence systems compared to operational IS motivate the necessity to research the business intelligence systems acceptance determinants separately. The authors followed an exploratory approach in order to conceptualize a business intelligence acceptance model. Their findings show that in the Business Intelligence Systems context, there is a significant emphasis on organizational factors, such as result demonstrability, social influence, and facilitating conditions with sufficient resources that help build an adequate information culture all substantially influencing the effective acceptance of business intelligence systems. 相似文献
2.
Kyle G. Webber Daniel J. Franzbach Jurij Koruza 《Journal of the American Ceramic Society》2014,97(9):2842-2849
Piezoelectric multilayer actuators are technologically important devices used in numerous positioning and force generation applications. During operation, the actuator displacement and force are nonlinearly coupled to the applied electric field, which is often ignored during material characterization. In this study, a novel experimental arrangement is presented that acts like a virtual linear spring, allowing for characterization of the full operational range as a function of applied electric field as well as the true blocking force and impedance matching system stiffness. The macroscopic measurements are contrasted to previous experimental techniques, providing insight into the effect of path dependence on the blocking force. 相似文献
3.
Yo‐Han Seo Jurij Koruza Andreja Benčan Barbara Malič Jürgen Rödel Kyle G. Webber 《Journal of the American Ceramic Society》2014,97(5):1582-1588
The influence of second phase zirconia particles on the electrical properties and fracture behavior of various polycrystalline soft Pb(Zr1?xTix)O3 (PZT) compositions was investigated. PZT composites with yttria‐stabilized tetragonal zirconia particles exhibited enhanced crack resistance in comparison to monolithic compositions, regardless of the PZT composition. The addition of zirconia, however, was found to change the PZT composition through the diffusion of zirconium, resulting in variations in the observed piezoelectric and ferroelectric responses. Through the tailoring of the PZT matrix composition, the large electromechanical response and enhanced fracture toughness could be retained. The variation in both small and large signal properties is contrasted to fracture results and crystal structure changes, as determined by X‐ray diffraction. 相似文献
4.
Daniel Bremecker K. V. Lalitha Siegfried Teuber Jurij Koruza Jürgen Rödel 《Journal of the American Ceramic Society》2022,105(2):1232-1240
A series of morphotropic phase boundary (MPB) compositions of (1–x)Na1/2Bi1/2TiO3-xBaTiO3 (x = 0.05, 0.055, 0.06, 0.065, 0.07), with and without 0.5 mol% Zn-doping was synthesized using the solid-state route. The samples were characterized using X-ray diffraction, dielectric analysis, and electromechanical measurements (piezoelectric d33 coefficient, coupling factor kp, mechanical quality factor Qm, and internal bias field Ebias). The increase in the ferroelectric-relaxor transition temperature upon Zn-doping was accompanied by a shift of the MPB toward the Na1/2Bi1/2TiO3-rich side of the phase diagram. Higher tetragonal phase fraction and increased tetragonal distortion were noted for Zn-doped (1 – x)Na1/2Bi1/2TiO3-xBaTiO3. In addition, ferroelectric hardening and the presence of an internal bias field (Ebias) were observed for all doped compositions. The piezoelectric constant d33 and the coupling coefficient kp decreased by up to ∼30%, while a 4- to 6-fold increase in Qm was observed for the doped compositions. Apart from establishing a structure–property correlation, these results highlight the chemically induced shift of the phase diagram upon doping, which is a crucial factor in material selection for optimal performance and commercialization. 相似文献
5.
Tea Tušar Peter Korošec Gregor Papa Bogdan Filipič Jurij Šilc 《Applied Intelligence》2007,27(2):101-111
The efficiency of universal electric motors that are widely used in home appliances can be improved by optimizing the geometry
of the rotor and the stator. Expert designers traditionally approach this task by iteratively evaluating candidate designs
and improving them according to their experience. However, the existence of reliable numerical simulators and powerful stochastic
optimization techniques make it possible to automate the design procedure. We present a comparative study of six stochastic
optimization algorithms in designing optimal rotor and stator geometries of a universal electric motor where the primary objective
is to minimize the motor power losses. We compare three methods from the domain of evolutionary computation, generational
evolutionary algorithm, steady-state evolutionary algorithm and differential evolution, two particle-based methods, particle-swarm
optimization and electromagnetism-like algorithm, and a recently proposed multilevel ant stigmergy algorithm. By comparing
their performance, the most efficient method for solving the problem is identified and an explanation of its success is offered. 相似文献
6.
Optimisation of combined collaborative recommender systems 总被引:1,自引:0,他引:1
Matev Toma Matev Jurij 《AEUE-International Journal of Electronics and Communications》2007,61(7):433-443
A new approach to collaborative user modelling is presented in this paper. We have developed a framework that can be used for easy testing of different concepts. We have also introduced three different areas where collaborative modelling can be further improved. For the first phase of testing, we have created a hybrid system based on three different collaborative recommender techniques. Since this system implements multiple collaboration techniques, we decided to call this approach Combined Collaborative Recommender. Although each prediction technique can produce adequate results, we have proved that the combination of these techniques into a unified system provides a much more stable system. It should also be pointed out that these analyses were done using a very large dataset (more than 2 million ratings) providing reliable results. Results of these optimisations are presented along with pointers for further development. 相似文献
7.
8.
Optimization of Multi-attribute User Modeling Approach 总被引:1,自引:0,他引:1
9.
Goran Casar Xinyu Li Jurij Koruza Qiming Zhang Vid Bobnar 《Journal of Materials Science》2013,48(22):7920-7926
Dielectric, thermal, and electrocaloric investigations of poly(vinylidene fluoride–trifluoroethylene) P(VDF–TrFE) copolymer, irradiated with high-energy electrons, are reported. While the ferroelectric copolymer is transformed into a relaxor system at high irradiation doses, dielectric investigations, particularly nonlinear dielectric experiments, i.e., temperature dependences of the second and the third harmonic dielectric response, clearly evidence that at lower doses ferroelectric and relaxor states coexist in the P(VDF–TrFE). This is confirmed by the differential scanning calorimetry, which further reveals the influence of irradiation on the copolymer crystallinity and melting point. Finally, it is shown that large electrocaloric response of VDF–TrFE-based polymers is further enhanced in systems with coexisting relaxor and normal ferroelectric states. 相似文献
10.
Noise source visualisation represents an important tool for technical acoustics. Many techniques of noise source visualisation have been developed, based on a specific noise source in a specific type of acoustic environment. A new visualisation method of complex noise sources is presented, using an acoustic camera and a new algorithm. Different transient acoustical phenomena can be noted. Additionally, a new family of biorthogonal wavelets is applied to determine fault in gears. The new wavelets are a generalisation of biorthogonal wavelet systems. Smoothness is controlled independently in the analysis. For the optimisation of the synthesis bank, discrete finite variation is used. Differentiability is measured, for which a large number of vanishing wavelet moments is necessary, in favour of a smoothness measure based on the fact that a finite depth of the filter bank tree is in most case related to practical applications. 相似文献