全文获取类型
收费全文 | 150篇 |
免费 | 16篇 |
专业分类
电工技术 | 9篇 |
综合类 | 5篇 |
化学工业 | 35篇 |
金属工艺 | 2篇 |
机械仪表 | 8篇 |
建筑科学 | 6篇 |
轻工业 | 7篇 |
无线电 | 16篇 |
一般工业技术 | 47篇 |
冶金工业 | 12篇 |
原子能技术 | 1篇 |
自动化技术 | 18篇 |
出版年
2023年 | 1篇 |
2022年 | 7篇 |
2021年 | 5篇 |
2020年 | 6篇 |
2019年 | 5篇 |
2018年 | 4篇 |
2017年 | 7篇 |
2016年 | 9篇 |
2015年 | 8篇 |
2014年 | 7篇 |
2013年 | 16篇 |
2012年 | 17篇 |
2011年 | 12篇 |
2010年 | 3篇 |
2009年 | 5篇 |
2008年 | 3篇 |
2007年 | 6篇 |
2006年 | 3篇 |
2005年 | 5篇 |
2004年 | 5篇 |
2003年 | 2篇 |
2002年 | 1篇 |
2001年 | 2篇 |
2000年 | 4篇 |
1999年 | 1篇 |
1998年 | 4篇 |
1997年 | 6篇 |
1996年 | 2篇 |
1995年 | 1篇 |
1994年 | 2篇 |
1993年 | 2篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1987年 | 1篇 |
1978年 | 1篇 |
1977年 | 1篇 |
排序方式: 共有166条查询结果,搜索用时 0 毫秒
91.
Hiroshi Nagayoshi Tatsuya Nakabayashi Hiroshi Maiwa Takenobu Kajikawa 《Journal of Electronic Materials》2011,40(5):657-661
This paper describes a practical high-efficiency thermoelectric (TE) power conditioner with maximum power point tracking (MPPT)
control for thermoelectric generators and the operation results for a battery load system. This power conditioner comprises
a high-frequency step-up/step-down switching converter and a microcontroller; a synchronized switching circuit is introduced
to achieve high conversion efficiency. Furthermore, it is equipped with a battery charge control program and has a maximum
conversion efficiency of 96.7%. An impedance matching method developed for MPPT control showed excellent response against
a change in the TEG output, making it suitable for solar TEGs as well as general applications. 相似文献
92.
Takenobu Usui Yoshihide Fujisaki Tomokazu Shiga 《Journal of the Society for Information Display》2019,27(9):559-569
Degradation of moving image quality by motion blur on hold‐type displays is a well‐known issue. In order to reduce motion blur, a number of driving methods, such as a higher frame rate and a shorter temporal aperture, have been proposed. Methods to reduce motion blur by means of signal processing as a precompensation method have also been proposed. In these methods, however, hold emission that emits light at a constant intensity during a frame is used. Since the spatial frequency response of the hold emission in a moving picture has a null point, the effectiveness of precompensation methods is limited to the lower‐spatial frequency domain. A triangular waveform emission has been investigated, and it has a higher spatial frequency response than hold emission. In the present paper, we calculated an optimized enhancement filter for the triangular waveform emission as a precompensation method and demonstrated its effectiveness for reducing motion blur by using the triangular waveform emission and the optimized enhancement filter. As a result, the optimized enhancement filter reduced motion blur and suppressed distortion that emerged when using a conventional enhancement filter. 相似文献
93.
94.
本文通过直接求解弹性力学基本方程,得到了[±θ]_s迭层条板在单轴拉伸时面力应力和层间应力的解析解。由这些应力表达式,可方便地分析层板物理参数和几何参数对层问应力的影响,能定量地确定层间应力的作用宽度,对于自由边界上是否存在应力奇异性得出了明确的结论。应力封闭解形式既能迅速有效地得到数值结果,又可成为用实验方法定量测定层间应力的理论依据。本文还讨论了铺迭次序对应力的影响,计算了典型层板应力沿板宽和板厚的分布。 相似文献
95.
Control of carrier density by self-assembled monolayers in organic field-effect transistors 总被引:2,自引:0,他引:2
Kobayashi S Nishikawa T Takenobu T Mori S Shimoda T Mitani T Shimotani H Yoshimoto N Ogawa S Iwasa Y 《Nature materials》2004,3(5):317-322
Organic thin-film transistors are attracting a great deal of attention due to the relatively high field-effect mobility in several organic materials. In these organic semiconductors, however, researchers have not established a reliable method of doping at a very low density level, although this has been crucial for the technological development of inorganic semiconductors. In the field-effect device structures, the conduction channel exists at the interface between organic thin films and SiO(2) gate insulators. Here, we discuss a new technique that enables us to control the charge density in the channel by using organosilane self-assembled monolayers (SAMs) on SiO(2) gate insulators. SAMs with fluorine and amino groups have been shown to accumulate holes and electrons, respectively, in the transistor channel: these properties are understood in terms of the effects of electric dipoles of the SAMs molecules, and weak charge transfer between organic films and SAMs. 相似文献
96.
The first ambipolar light‐emitting transistor of an organic molecular semiconductor single crystal, tetracene, is demonstrated. In the device configuration, electrons and holes injected from separate magnesium and gold electrodes recombined radiatively within the channel. By varying the applied voltages, the position of the recombination/emission zone could be moved to any position along the channel. Because of the changes made to the device structure, including the use of single crystals and polymer dielectric layers and the adoption of an inert‐atmosphere fabrication process, the set of materials that can be used for light‐emitting transistors has been expanded to include monomeric molecular semiconductors. 相似文献
97.
Takenobu T Takahashi T Akima N Shiraishi M Kataura H Iwasa Y 《Journal of nanoscience and nanotechnology》2007,7(10):3533-3536
Herein, we have studied a structure of SWNT films doped by organic molecules. In this study, we reacted organic molecules with SWNT films by a vapor phase and a liquid phase, respectively. The structure of doped SWNT films was investigated using synchrotron X-ray powder diffraction measurements, and we found the clear difference between the vapor phase reaction (v-doped) and the liquid phase reaction (I-doped). In v-doped SWNT films, organic molecules are predominantly encapsulated inside SWNTs, although molecules adsorbed on the surface of SWNT bundles in l-doped SWNT films. 相似文献
98.
99.
Ming‐Hui Chiu Hao‐Ling Tang Chien‐Chih Tseng Yimo Han Areej Aljarb Jing‐Kai Huang Yi Wan Jui‐Han Fu Xixiang Zhang Wen‐Hao Chang David A. Muller Taishi Takenobu Vincent Tung Lain‐Jong Li 《Advanced materials (Deerfield Beach, Fla.)》2019,31(18)
2D transition metal dichalcogenide (TMD) layered materials are promising for future electronic and optoelectronic applications. The realization of large‐area electronics and circuits strongly relies on wafer‐scale, selective growth of quality 2D TMDs. Here, a scalable method, namely, metal‐guided selective growth (MGSG), is reported. The success of control over the transition‐metal‐precursor vapor pressure, the first concurrent growth of two dissimilar monolayer TMDs, is demonstrated in conjunction with lateral or vertical TMD heterojunctions at precisely desired locations over the entire wafer in a single chemical vapor deposition (VCD) process. Owing to the location selectivity, MGSG allows the growth of p‐ and n‐type TMDs with spatial homogeneity and uniform electrical performance for circuit applications. As a demonstration, the first bottom‐up complementary metal‐oxide‐semiconductor inverter based on p‐type WSe2 and n‐type MoSe2 is achieved, which exhibits a high and reproducible voltage gain of 23 with little dependence on position. 相似文献
100.
An experimental investigation was carried out in order to prepare ceramic composite pipes used for tubular solid oxide fuel cells by using a multi-billet extrusion technique. Particular emphasis was given to the forming possibility and extrusion behavior of a two-layer pipe consisting of NiO-YSZ(PSZ) (anode) and YSZ (electrolyte). It is shown that the extrusion pressure and binder content required decrease with increasing the fraction of nickel oxide in the anode layers. The porosity in the anode layers depends on the binder content in pastes. It is feasible to prepare anode/electrolyte composite pipes by means of co-extrusion of different pastes.Furthermore, it is possible to obtain sound sintered pipes even under pressureless sintering conditions. 相似文献