全文获取类型
收费全文 | 80篇 |
免费 | 4篇 |
专业分类
化学工业 | 15篇 |
金属工艺 | 3篇 |
机械仪表 | 1篇 |
建筑科学 | 1篇 |
能源动力 | 3篇 |
轻工业 | 22篇 |
石油天然气 | 1篇 |
无线电 | 4篇 |
一般工业技术 | 14篇 |
冶金工业 | 18篇 |
自动化技术 | 2篇 |
出版年
2023年 | 3篇 |
2022年 | 1篇 |
2021年 | 3篇 |
2020年 | 6篇 |
2019年 | 4篇 |
2018年 | 4篇 |
2017年 | 3篇 |
2016年 | 1篇 |
2015年 | 4篇 |
2014年 | 1篇 |
2013年 | 6篇 |
2012年 | 2篇 |
2011年 | 3篇 |
2010年 | 5篇 |
2009年 | 3篇 |
2008年 | 8篇 |
2007年 | 3篇 |
2006年 | 1篇 |
2004年 | 3篇 |
2003年 | 1篇 |
2002年 | 2篇 |
1999年 | 1篇 |
1998年 | 7篇 |
1997年 | 4篇 |
1996年 | 1篇 |
1995年 | 2篇 |
1994年 | 1篇 |
1993年 | 1篇 |
排序方式: 共有84条查询结果,搜索用时 15 毫秒
1.
B Kirel S Yetgin U Saatci S Ozen A Bakkaloglu N Besbas 《Canadian Metallurgical Quarterly》1996,15(3):236-241
Brush border myosin-I (BBMI) is a single-headed unconventional myosin found in the microvilli of intestinal epithelial cells, where it links the core bundle of actin filaments to the plasma membrane. An association of BBMI with anionic phospholipids has been shown to be mediated by a carboxy-terminal domain which is rich in basic amino acids. We have exploited this natural affinity of BBMI for negatively charged lipids to form two-dimensional (2D) crystals of this protein which are suitable for structural analysis by electron crystallographic techniques. The 2D crystals which we have obtained belong to one of two space groups, p22121 or p2. We present here projection maps calculated from images of negatively stained crystals for each of these crystal types to a resolution of 20 A and show that the asymmetric unit is the same in both crystal types. 相似文献
2.
Acceptance, utility, and usability of system designs have become a focal interest in human–computer interaction (HCI) research, yet at present there is a lack detailed understandings of which system design features influence them. The purpose of the study is to examine the effects of five product design features; customization, adaptive behavior, memory load, content density, and speed on user preference through an experimental study by using conjoint analysis. In experimental study, instead of classical conjoint cards, prototypes were generated for products. Besides, desirability and market segments of product prototypes were identified. In line with the results, among the five product design features, speed is the most and customization is the least important features that affect user preference. Contrary to the expectations, customization has a relatively small importance value in this research. Subsequent design features that influence user preference after speed are minimal memory load, adaptive behavior, and content density, respectively. According to findings, interfaces that have high-speed, minimal memory load, adaptive behavior, low content density, and customization features are more preferable than those that do not. 相似文献
3.
Maria Elizabeth Grabe Ozen Bas Irene Ingeborg van Driel 《The Journal of communication》2015,65(2):300-319
Education‐based knowledge gaps are well‐documented across countries, media platforms, and content. Without exception, knowledge is measured through words not images. Given the centrality of sight in the natural history of Homo sapiens, the extraordinary visual acuity of humans, and the proliferation of screen‐based visual media environments in contemporary life, an experiment was conducted to test the knowledge gap visually. Participants watched 8 audiovisual news stories. Simple recognition of story details and comprehension of that information were tested in verbal and visual modalities. Results offered the first confirmation of the knowledge gap in visual terms. Yet, gaps were significantly smaller employing visual than verbal measures, pointing to the need for continued efforts to develop visual measures for future memory studies. 相似文献
4.
Iranian Polymer Journal - Surface of Al2O3 nanoparticles was modified with a silane coupling agent, and aramid fiber-reinforced epoxy nanocomposites were produced using these particles. Three... 相似文献
5.
Cihan Ates Guzide Ozen Gorkem Kulah 《Numerical Heat Transfer, Part A: Applications》2018,73(6):385-407
In this study, a radiation code based on the method of lines solution of the discrete ordinates method for the prediction of radiative heat transfer in nongray gaseous media is developed by incorporation of two different spectral gas radiative property models, banded spectral line-based weighted sum of gray gases (banded SLW) and gray wide band (GWB) approximation in the presence of nongray absorbing–emitting–scattering particles. The aim is to introduce an accurate and CPU efficient spectral gas radiation model, which is compatible with spectral fuel/ash particle property models. Input data required for the radiation code and its validation are provided from two combustion tests previously performed in a 300 kWt atmospheric bubbling fluidized bed combustor test rig burning low calorific value Turkish lignite with high volatile matter/fixed carbon (VM/FC) ratio in its own ash. The agreement between wall heat fluxes and source term predictions obtained by global and banded SLW models reveal that global SLW model can be converted to an accurate wide band gas model (banded SLW) which can directly be coupled with spectral particle radiation. Furthermore, assessment of GWB approximation by benchmarking its predictions against banded SLW model shows that GWB gives reasonable agreement with a higher CPU efficiency when the particle absorption coefficient is at least in the same order of magnitude with the gas absorption coefficient. 相似文献
6.
7.
8.
M. Grujicic G. Arakere B. Pandurangan V. Sellappan A. Vallejo M. Ozen 《Journal of Materials Engineering and Performance》2010,19(8):1116-1127
A multi-disciplinary design-optimization procedure has been introduced and used for the development of cost-effective glass-fiber
reinforced epoxy-matrix composite 5 MW horizontal-axis wind-turbine (HAWT) blades. The turbine-blade cost-effectiveness has
been defined using the cost of energy (CoE), i.e., a ratio of the three-blade HAWT rotor development/fabrication cost and
the associated annual energy production. To assess the annual energy production as a function of the blade design and operating
conditions, an aerodynamics-based computational analysis had to be employed. As far as the turbine blade cost is concerned,
it is assessed for a given aerodynamic design by separately computing the blade mass and the associated blade-mass/size-dependent
production cost. For each aerodynamic design analyzed, a structural finite element-based and a post-processing life-cycle
assessment analyses were employed in order to determine a minimal blade mass which ensures that the functional requirements
pertaining to the quasi-static strength of the blade, fatigue-controlled blade durability and blade stiffness are satisfied.
To determine the turbine-blade production cost (for the currently prevailing fabrication process, the wet lay-up) available
data regarding the industry manufacturing experience were combined with the attendant blade mass, surface area, and the duration
of the assumed production run. The work clearly revealed the challenges associated with simultaneously satisfying the strength,
durability and stiffness requirements while maintaining a high level of wind-energy capture efficiency and a lower production
cost. 相似文献
9.
10.