全文获取类型
收费全文 | 77篇 |
免费 | 2篇 |
国内免费 | 1篇 |
专业分类
电工技术 | 1篇 |
化学工业 | 11篇 |
金属工艺 | 5篇 |
机械仪表 | 1篇 |
建筑科学 | 1篇 |
轻工业 | 1篇 |
无线电 | 6篇 |
一般工业技术 | 34篇 |
冶金工业 | 11篇 |
原子能技术 | 3篇 |
自动化技术 | 6篇 |
出版年
2021年 | 2篇 |
2018年 | 3篇 |
2017年 | 3篇 |
2016年 | 4篇 |
2014年 | 3篇 |
2013年 | 3篇 |
2012年 | 5篇 |
2011年 | 4篇 |
2010年 | 1篇 |
2009年 | 1篇 |
2008年 | 2篇 |
2007年 | 10篇 |
2005年 | 4篇 |
2004年 | 1篇 |
2003年 | 2篇 |
2002年 | 1篇 |
2001年 | 2篇 |
2000年 | 2篇 |
1999年 | 2篇 |
1998年 | 6篇 |
1997年 | 4篇 |
1996年 | 2篇 |
1995年 | 3篇 |
1994年 | 2篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1985年 | 1篇 |
1984年 | 3篇 |
1968年 | 2篇 |
排序方式: 共有80条查询结果,搜索用时 31 毫秒
1.
Kimiaki Shirahama Yuta Matsuoka Kuniaki Uehara 《Multimedia Tools and Applications》2014,71(3):967-989
An application of Query-By-Example (QBE) is presented where shots that are visually similar to provided example shots are retrieved. To implement QBE, counter-example shots are required to accurately distinguish shots that are relevant to the query from those that are not (Li and Snoek (2009), Yu et al. (2004)). However, there are usually a huge number of shots, not relevant to a particular query, which can serve as counter-example shots. It is difficult for a user to provide counter-example shots that would aid retrieval. Thus, we developed a QBE method based on partially supervised learning where a retrieval model is constructed by selecting counter-example shots from shots without user supervision. To ensure the speed and accuracy of the QBE method, we select a small number of counter-example shots that are visually similar to given example shots but irrelevant to the query. Such shots are useful for characterizing the boundary between relevant and irrelevant shots. For our method, we first filter shots that are visually dissimilar to example shots based on SVMs on a visual feature. Then we filter shots relevant to the query based on concept detection results from pre-constructed classifiers. Shots that pass the above two tests are considered as counter-example shots. Experimental results obtained using TRECVID 2009 video data validate the effectiveness of our method. 相似文献
2.
3.
Giang T. Nguyen Ei L. Chan Takuya Tsuji Toshitsugu Tanaka Kimiaki Washino 《Advanced Powder Technology》2021,32(5):1410-1425
In this work, a resolved CFD–DEM coupling model for the simulation of gas-liquid-solid flows is developed: the interface capturing method based on the colour function is employed for fluids (i.e. a gas and liquid) whilst Discrete Element Method (DEM) is used for particles. The Volume Penalisation (VP) method is adopted to consider the hydrodynamic interactions between fluids and particles along with the Immersed Free Surface (IFS) method, which artificially extends the gas-liquid interface into the interior of the particle to account for the wettability. The unique point of the proposed model is that the thickness of the gas-liquid interface can be controlled by using both interface compression and diffuse interface techniques simultaneously. From the simulation results, it is presented that the accurate evaluation of the surface tension force as well as the capillary force can be achieved by appropriately controlling the interface thickness. Moreover, the major two methods in the literature to calculate the capillary force are compared in this work. The validity of the proposed model is presented for both static and dynamic cases. The behaviour of two colliding particles with a dynamic liquid bridge is then simulated to demonstrate the applicability of the proposed model to a complex three-phase system. 相似文献
4.
5.
Grain-growth inhibition in an Fe-10 mass pct Ni alloy, which was continuously cooled from a melt, was studied at 1673 K in
the presence of primary deoxidation products of ZrO2 or MgO particles. The mean grain size and grain-size distribution in a cross section were measured as a function of holding
time for up to 240 minutes. The grain growth was strongly inhibited by the inclusion particles and was influenced by the dissolved
Zr. In the Zr deoxidation, the number of particles per unit area (N
A) ranged from 80 to 650 mm−2, the ZrO2 particle size (
) varied from 1.1 to 1.6 μm, and the dissolved Zr level was below 1800 mass ppm. In the Mg deoxidation, the particle-number density was 90 to 270 mm−2, the MgO particle size was 1.1 to 1.7 μm, and the dissolved Mg level was below 20 mass ppm. In a logarithmic plot of the ratio of limiting mean grain diameter (
) to the mean particle diameter (
) against the volume fraction of particles (f
V), both the
value for a given f
V value, which ranged from 0.014 to 0.074 pct, and the slope were significantly lower than that predicted from the two-dimensional
relation
=(4/π) · f
V
/−1
, i.e., Zener’s limit. This discrepancy is discussed in light of the fraction of particles at the grain boundaries measured experimentally.
Normal grain growth was confirmed from the grain-size distribution observed as a function of holding time, which was best
described by the log-normal distribution. 相似文献
6.
K Dohmen T Shimada S Onohara M Shirahama Y Miyamoto K Irie H Ishibashi 《Canadian Metallurgical Quarterly》1998,89(9):277-281
A 63-year-old Japanese male with diabetes mellitus developed obstructive jaundice following the onset of multiple hepatic abscesses. Percutaneous transhepatic cholangiography showed intrahepatic bile duct irregularity and dilatations accompanied by a complete obstruction of the right branch of the intrahepatic bile duct. Three kinds of organisms were cultured from the blood and the drained bile. The cholangiographic changes returned to the normal after the liver abscesses subsided following biliary drainage and the administration of intravenous antibiotics. 相似文献
7.
In order to develop a short-term algal toxicity test, the growth of and the phosphate uptake by the green alga Selenastrum capricornutum during batch culture were observed. In the control medium, S. capricornutum took up phosphate earlier than it grew. It was also observed that the phosphate uptake was inhibited by the presence of a toxicant. From these results, phosphate uptake was considered as one of the useful effect parameters for a short-term algal toxicity test. As the removal rate of phosphate from the medium is a function of the amount of algal cell initially inoculated, the test period is variable. The relationship between the amount of inoculation and phosphate uptake was examined and the test conditions suitable for a 3-h toxicity test were established as one example. According to this test procedure, the inhibitory effect of some toxicants on the phosphate uptake was determined. For comparison, a conventional algal assay based on algal growth was also performed. The EC50s for both tests were close. This indicated that the algal toxicity test method proposed in this paper would be useful for the uses where rapidity is required. 相似文献
8.
Toshiaki Kobayashi Junko Taniguchi Masaru Suzuki Keiya Shirahama 《Journal of Low Temperature Physics》2007,148(5-6):797-801
Previously, we carried out ultrasonic measurements for liquid 4He filled in a nanoporous glass (Gelsil), and observed an increase in the sound velocity due to decoupling of the superfluid
component. At zero pressure, the superfluid transition temperature T
C is suppressed to 1.4 K from the bulk lambda point, 2.17 K. This behavior is the same as torsional oscillator measurements
by Yamamoto et al. (Phys. Rev. Lett. 93:075302, 2004). However, the pressure dependence of T
C and the temperature dependence of the superfluid fraction are very different from the torsional oscillator measurements.
In order to clarify the origin of the difference, we have developed a new technique of simultaneous measurement of an ultrasound
and a torsional oscillator, and the system successfully works for a nanoporous glass. Here, we compare decoupling of the superfluid
component for 4He films between an ultrasound and a torsional oscillator. 相似文献
9.
Raghavendra C. Mundargi Michael G. Potroz Soohyun Park Jae Hyeon Park Hitomi Shirahama Jae Ho Lee Jeongeun Seo Nam‐Joon Cho 《Advanced functional materials》2016,26(4):487-497
Herein, the exploration of natural plant‐based “spores” for the encapsulation of macromolecules as a drug delivery platform is reported. Benefits of encapsulation with natural “spores” include highly uniform size distribution and materials encapsulation by relatively economical and simple versatile methods. The natural spores possess unique micromeritic properties and an inner cavity for significant macromolecule loading with retention of therapeutic spore constituents. In addition, these natural spores can be used as advanced materials to encapsulate a wide variety of pharmaceutical drugs, chemicals, cosmetics, and food supplements. Here, for the first time a strategy to utilize natural spores as advanced materials is developed to encapsulate macromolecules by three different microencapsulation techniques including passive, compression, and vacuum loading. The natural spore formulations developed by these techniques are extensively characterized with respect to size uniformity, shape, encapsulation efficiency, and localization of macromolecules in the spores. In vitro release profiles of developed spore formulations in simulated gastric and intestinal fluids have also been studied, and alginate coatings to tune the release profile using vacuum‐loaded spores have been explored. These results provide the basis for further exploration into the encapsulation of a wide range of therapeutic molecules in natural plant spores. 相似文献
10.
Kimiaki Tsutsui Hiroaki Yoshimizu Yoshiharu Tsujita Takatoshi Kinoshita 《应用聚合物科学杂志》1999,73(13):2733-2738
The permeability coefficients of O2, N2, and CO2 gases at 25°C were examined for composite membranes that were prepared by filling poly(ethylene oxide)(PEO) with different molecular weights into a porous membrane. The permeability coefficients of O2, N2, and CO2 were 2 × 10−10 – 4 × 10−10, 5 × 10−11 – 9.5 × 10−11, and 6 × 10−10 – 1 × 10−9 (cm3 STPcm/cm2 s cmHg), respectively. The higher permeability coefficients of CO2 are explained in terms of high solubility of CO2 in filled PEO. The permeability coefficient of CO2 was affected by the degree of crystallinity of PEO in the composite. On the other hand, there was little effect of crystallinity on O2 and N2 permeability coefficients. Some probable relationships between selectivities of O2 to N2 and CO2 to N2 and the degree of crystallinity of PEO were observed. The CO2 gas permeability coefficients of the composite membrane for PEO50000 (Mw = 5 × 104) showed a marked change due to melting or crystallization of PEO. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 73: 2733–2738, 1999 相似文献