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71.
Takahashi M. Mimura Y. Hiroishi J. Tadakuma M. Sugizaki R. Sakano M. Yagi T. 《Lightwave Technology, Journal of》2007,25(8):2103-2107
Theoretical influences of reducing the cladding diameter for silica highly nonlinear fiber (HNLF) have been investigated by the finite-element method. Downsized HNLF with 56-mum cladding was fabricated, and certain reliability was confirmed through mechanical and environmental tests. A coin-sized module was obtained using over 200 m of 56-mum HNLF. 相似文献
72.
It is well-known that an infected open fracture needs careful management. If the infected organisms are antibiotic-tolerant species such as Pseudomonas aeruginosa or methicillin-resistant Staphylococcus aureus (MRSA), treatment becomes quite difficult. Here we report that an open femoral fracture infected by these organisms was satisfactorily treated by the combination of external fixation and functional bracing without residual osteomyelitis. 相似文献
73.
Yusuke Kariya Hiroyuki Yahagi Masato Takehisa Shigeki Yoshihara Taiki Ogata Tatsunori Hara 《Advanced Robotics》2013,27(14):1059-1072
At large airports, aircraft takeoff and land simultaneously on multiple runways. As a result, taxiing is a complex and, at times, lengthy process. Planning for aircraft taxiing is an essential design element for the expansion of runways, taxiways, and terminals. Unnecessary taxiing should be reduced. In this study, we develop a taxiing model and calculate the taxiing time. We observed aircraft traffic patterns and listened to the communication of air traffic controllers (ATCs) in order to develop a taxiing model. The developed model was applied to Narita International Airport. We begin by estimating the time required for taxiing at Narita International for 2014. Next, we propose two strategies to reduce the taxiing time. The first strategy involves changes in departure times with controlled intervals between them. In this strategy, the average taxiing time is reduced by 16.5%. The other strategy requires adjustments in the time from the aircraft departure from the terminal to the start of taxiing. In this strategy, the maximum taxiing time is reduced by 11.5%, and the intervals between the terminal departures and taxiing were more uniform. 相似文献
74.
Tatsunori Matsumoto Hisashi Nemoto Hiroshi Mikami Kou Yaegashi Toshiaki Arai Pastsakorn Kitiyodom 《Soils and Foundations》2010,50(1):63-81
A series of experimental and analytical studies on the behaviours of model pile groups and model piled rafts in dry sand subjected to static vertical loading and static cyclic horizontal loading were carried out in order to investigate the influence of various pile head connection conditions between the raft and the piles on the behaviours of the foundations models and to examine the applicability of an simplified analytical method to simulate the load tests. In the load tests, the behaviours of the model foundations were investigated in detail, with particular focus on cyclic horizontal loading, and behaviour such as horizontal stiffness and the rotation of the foundation, the load proportions between the raft and the piles, and the bending moments and shear forces generated in the piles. A simplified three-dimensional deformation analysis method was used to simulate the experiments. 相似文献
75.
76.
Suriyah Thongmunee Tatsunori Matsumoto Shun-Ichi Kobayashi Pastsakorn Kitiyodom Ken Kurosawa 《Soils and Foundations》2011,51(5):959-974
This paper focuses on the bearing capacity of soil plugs (internal shaft resistance) through fundamental research on the bearing mechanism of dry silica sand plugs. Push-up load tests on the dry silica sand plugs inside a model pipe pile and DEM simulations were carried out to investigate the plugging behaviour. The influences of the packing state of the soil plugs (the relative density), and the height of the plugs on the bearing capacity were investigated. Prior to the push-up load tests, element tests on the silica sand and DEM analyses were performed to characterise the silica sand and to determine suitable DEM analysis parameters. The experimental and DEM results clearly show that the push-up force increases significantly with the increase in the aspect ratio of the soil plug, H/D, and with the relative density of the soil plug. The DEM analyses show a good agreement with the experimental results when the push-up force is small. Furthermore, the DEM results reveal that only the density of the soil plug in the lower portion, adjacent to the pile tip, increases gradually with the increase in the push-up displacement as well as the increase in H/D. Hence, it is the lower portion of the soil plug that mainly controls the capacity of the soil plug. 相似文献
77.
An approximate method of analysis has been developed to estimate the settlement and load distribution of large piled raft foundations. In the method the raft is modelled as a thin plate, and the piles and the soil are treated as interactive springs. Both the resistances of the piles as well as the raft base are incorporated into the model. Pile-soil-pile interaction, pile-soil-raft interaction and raft-soil-raft interaction are taken into account based on Mindlin's solutions. The proposed method makes it possible to solve problems of large non-uniformly arranged piled rafts in a time-saving way using a PC. The method can also be used for the deformation analysis of pile groups by setting the soil resistance at the raft base equal to zero. The validity of the proposed method is verified through comparisons with existing solutions. Two case studies on settlement analyses of a free-standing pile group and a large piled raft are presented. In the analyses, applicability of the equivalent pier concept is also examined and discussed. The computed settlements compare favourably with the field measurements. 相似文献
78.
Shinji Yae Tsutomu Kobayashi Tatsunori Kawagishi Naoki Fukumuro Hitoshi Matsuda 《Solar Energy》2006,80(6):701-706
Antireflection of silicon (Si) surface is one key technology for the manufacture of efficient solar cells. Metal particle enhanced HF etching is applied to produce uniform antireflecting porous layer on multicrystalline Si wafers that cannot be uniformly texturized by anisotropic etching with an alkaline solution. Fine platinum (Pt) particles are deposited on multicrystalline n-Si wafers by electroless displacement reaction in a hexachloroplatinic acid solution containing HF. Both macroporous and luminescent microporous layers are uniformly formed by immersing the Pt-particle-deposited multicrystalline Si wafers in a HF solution. The reflectance of the wafers is reduced from 30% to 6% by the formation of porous layer. The photocurrent density of photoelectrochemical solar cells using porous multicrystalline n-Si has a 25% higher value than non-porous Si cells. 相似文献
79.
Kobayashi Y Hernandez OJ Sakaguchi T Yajima T Roisnel T Tsujimoto Y Morita M Noda Y Mogami Y Kitada A Ohkura M Hosokawa S Li Z Hayashi K Kusano Y Kim Je Tsuji N Fujiwara A Matsushita Y Yoshimura K Takegoshi K Inoue M Takano M Kageyama H 《Nature materials》2012,11(6):507-511
In oxides, the substitution of non-oxide anions (F(-),S(2-),N(3-) and so on) for oxide introduces many properties, but the least commonly encountered substitution is where the hydride anion (H(-)) replaces oxygen to form an oxyhydride. Only a handful of oxyhydrides have been reported, mainly with electropositive main group elements or as layered cobalt oxides with unusually low oxidation states. Here, we present an oxyhydride of the perhaps most well-known perovskite, BaTiO(3), as an O(2-)/H(-) solid solution with hydride concentrations up to 20% of the anion sites. BaTiO(3-x)H(x) is electronically conducting, and stable in air and water at ambient conditions. Furthermore, the hydride species is exchangeable with hydrogen gas at 400 °C. Such an exchange implies diffusion of hydride, and interesting diffusion mechanisms specific to hydrogen may be at play. Moreover, such a labile anion in an oxide framework should be useful in further expanding the mixed-anion chemistry of the solid state. 相似文献
80.
Takeo Hattori Yasuhiko Iwadate Tatsunori Sato 《Journal of the American Ceramic Society》1990,73(1):140-141
PbSe and PbS are both volatile and difficult to densify by normal sintering. We tried to sinter these compounds in a closed system, that is, by hot isostatic pressing in a glass capsule. Hot isostatic pressing was carried out for these compounds on the basis of their thermal behaviors in air as studied by TG-DTA. The maximum bulk densities obtained were 8.10 and 7.50 g/cm3 , respectively, corresponding to their theoretical densities. The microstructures of the isostatically hot-pressed bodies were also observed by SEM. The present work shows that ceramic compounds which are normally volatile can be densified by encapsulation in glass followed by hot isostatic pressing. 相似文献