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排序方式: 共有179条查询结果,搜索用时 15 毫秒
51.
Hironobu Imakoma Daisuke Katsura Kazuhiko Kawamura Hiroyuki Iyota Nobuya Nishimura 《Drying Technology》2005,23(6):1289-1301
Dependency of absorbed power by microwave on the local moisture content in a glass particle layer was measured with a new method; that is, heating the wet layer. The heating experiment was performed using a laboratory-scale combined convective and microwave heater/dryer that was manufactured by modifying a domestic microwave oven at 2.45 GHz. The measured result was strongly dependent on the local moisture content and showed a maximum and a minimum within the measured range of the moisture content. This dependency can be explained by the assumption that moisture in the wet layer behaves as a mass of the free water. The combined drying rate of the wet layer measured with the heater/dryer was simulated with both the power dependency and the experimental convective-only drying rate. Power dependency on temperature is as important as the moisture content in the simulation. Simulated results agree very well with experimental ones. 相似文献
52.
Yoshihiro Kamada Hideki Fujii Hironobu Fujii Yoshiyuki Sawai Yoshinori Doi Naofumi Uozumi Kayo Mizutani Maaya Akita Motoya Sato Sachiho Kida Noriaki Kinoshita Nobuhiro Maruyama Takayuki Yakushijin Masanori Miyazaki Hisao Ezaki Naoki Hiramatsu Yuichi Yoshida Shinichi Kiso Yasuharu Imai Norifumi Kawada Tetsuo Takehara Eiji Miyoshi 《Proteomics. Clinical applications》2013,7(9-10):648-656
53.
An experimental study was conducted to investigate transient local heat transfer around a bubble at onset of boiling on a thin glass heating plate immersed in saturated n-hexane at low pressure. Eight rapid response Cu-Ni thermocouples consisting of a vacuum deposited thin film were used to measure the temperature change of the heating surface. Simultaneous high-speed video photographs were also obtained. The surface temperatures near a nucleation site decreased rapidly owing to the evaporation of a thin layer (microlayer) of liquid formed beneath the bubble in the early period and the rate of bubble growth increased with increasing incipient boiling superheat (ΔTIB). The thickness of the microlayer decreased markedly with increasing ΔTIB. © 1998 Scripta Technica, Heat Trans Jpn Res, 26(7): 484–492, 1997 相似文献
54.
55.
A novel sulfonated diamine bearing sulfophenyl pendant groups of 2,2′-(4-sulfophenyl) benzidine (BSPhB) was synthesized. Sulfonated polyimides (SPIs) derived from 1,4,5,8-naphthalene tetracarboxylic dianhydride, BSPhB and other non-sulfonated diamines were successfully synthesized. The SPIs with ion exchange capacity (IEC) of 1.5-2.8 meq g−1 showed high reduced viscosity of 3-10 dL g−1 and high desulfonation temperature of 320 °C. The SPI membranes were tough and flexible, having high stress at break of more than 80 MPa and elongation of 80-100%. They showed highly anisotropic membrane swelling in water with larger swelling in thickness direction than in plane direction. They showed fairly high proton conductivity (σ). For example, the membrane with IEC of 1.77 meq g−1 exhibited σ values of 120 and 260 mS cm−1 at 60 and 120 °C, respectively, in water. They also showed fairly high water stability. 相似文献
56.
Hironobu Yoshikawa Kumiko Kikuchi Hirohisa Yaguchi Yoko Mizokami Sadaki Takata 《Color research and application》2012,37(4):281-291
Although the color measurement of facial skin becomes more common in dermatology and cosmetics, little is known about the relationship between subjective color perception and colorimetric values in facial skin. In this study, the possible relationships among perceived whiteness and the metric lightness, chroma and hue angle of Japanese females' facial skin color were investigated. First, the perceived brightness of the facial skin of Japanese females was evaluated visually and compared with metric lightness, chroma and hue angle, and the effect of hue and chroma on the perceived brightness was discussed. Second, a psychophysical experiment on the whiteness of the facial images and synthesized skin color plate images was conducted for examining the effect of hue and chroma on the perceived whiteness more precisely and independently. The results of two experiments showed that in regard to the facial skin color of the Japanese female, metric lightness disagrees with perceived whiteness or brightness in a narrow lightness range. The reddish facial skin color appeared brighter or whiter than that of a yellowish one in high lightness regions, and the low‐chroma facial skin color appeared brighter or whiter than a high‐chroma one. However, in the color plate images, a change in perceived whiteness by hue could not be confirmed, and the change in perceived whiteness by chroma was weaker than that from facial images. These results indicated that a higher‐level process of face recognition affected whiteness perception, and the criterion of facial skin whiteness was determined by facial skin color distribution. © 2011 Wiley Periodicals, Inc. Col Res Appl, 2011; 相似文献
57.
David Basin Hironobu Kuruma Kunihiko Miyazaki Kazuo Takaragi Burkhart Wolff 《Formal Aspects of Computing》2007,19(1):63-91
We report on a case study in applying different formal methods to model and verify an architecture for administrating digital
signatures. The architecture comprises several concurrently executing systems that authenticate users and generate and store
digital signatures by passing security relevant data through a tightly controlled interface. The architecture is interesting
from a formal-methods perspective as it involves complex operations on data as well as process coordination and hence is a
candidate for both data-oriented and process-oriented formal methods.
We have built and verified two models of the signature architecture using two representative formal methods. In the first,
we specify a data model of the architecture in Z that we extend to a trace model and interactively verify by theorem proving.
In the second, we model the architecture as a system of communicating processes that we verify by finite-state model checking.
We provide a detailed comparison of these two different approaches to formalization (infinite state with rich data types versus
finite state) and verification (theorem proving versus model checking). Contrary to common belief, our case study suggests
that Z is well suited for temporal reasoning about process models with complex operations on data. Moreover, our comparison
highlights the advantages of proving theorems about such models and provides evidence that, in the hands of an experienced
user, theorem proving may be neither substantially more time-consuming nor more complex than model checking. 相似文献
58.
A chemiluminescence-based high-performance liquid chromatographic method was developed for the analysis of the addition products
of α-tocopherol with phosphatidylcholine-peroxyl radicals (TOO-PC). The TOO-PC eluted from a reversed-phase column was reacted
with a chemiluminescent reagent consisting of a Cypridina luciferin analog and a lipid-soluble iron chelate in acidic methanol at 50°C, and the generated chemiluminescence was monitored.
The detection limit for TOO-PC by this method was about 1 pmol. This method was applied to the detection of TOO-PC in the
peroxidized membranes prepared from rabbit erythrocyte ghosts. When the erythrocyte ghosts were peroxidized by the addition
of a water-soluble free radical initiator, a peak corresponding to TOO-PC was detected on the chromatogram with chemiluminescent
detection. The amount of TOO-PC in the erythrocyte membranes increased with the depletion of endogenous α-tocopherol. The
results indicate that this method proved useful for the detection of the TOO-PC formed by the peroxyl-radical scavenging reactions
of α-tocopherol in biological systems. 相似文献
59.
Nobuko Hanada Enoki Hirotoshi Takayuki Ichikawa Etsuo Akiba Hironobu Fujii 《Journal of Alloys and Compounds》2008,450(1-2):395-399
The microstructures of MgH2 catalyzed with Ni nano-particle or Nb2O5 mesoporous powders are examined by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) observations. For MgH2 catalyzed with Ni, the Ni particles with the diameter smaller than 1 μm were detected on the MgH2 particles with the diameter smaller than 5 μm by the back scattering electron (BSE) microscopy. In details, the TEM micrograph indicates that the Ni particles distribute 20 nm in diameter on MgH2 uniformly, which was the same size as the additive doped in MgH2 before milling. On the other hand, for MgH2 catalyzed with Nb2O5, the additive particles could not be found anywhere in the BSE image. Even in the TEM micrograph by much larger magnification than the SEM micrograph, the particles corresponding to the additive cannot be observed at all. Furthermore, an energy dispersive X-ray (EDX) analysis in spots with a diameter of 20 nm indicated that the existing ratio of Mg to Nb was evaluated to 98:2, being the same as the starting ratio before milling. Therefore, the metal oxide Nb2O5 becomes extremely small particle that could not be observed by the present work after milling compared to metal Ninano. 相似文献
60.
Tamura S Hirano M Chen X Sato Y Narumi Y Hori M Takahashi S Nakamura H 《IEEE transactions on bio-medical engineering》2002,49(10):1187-1194
To avoid or reduce the X-ray exposure in endoscopic examinations and therapy, as an alternative to the conventional two-dimensional X-ray fluoroscopy we are developing an intrabody navigation system that can directly measure and visualize the three-dimensional (3-D) position of the tip and the trace of an ultrasound endoscope. The proposed system can identify the 3-D location and direction of the endoscope probe inserted into the body to furnish endoscopic images. A marker transducer(s) placed on the surface of the body transmits ultrasound pulses, which are visualized as a marker synchronized to the scanning of the endoscope. The position (direction and distance of the marker transducer(s) outside the body relative to the scanning probe inside the body) of the marker is detected and measured in the scanned image of the ultrasound endoscope. Further, an optical localizer locates the marker transducer(s) with six degrees of freedom. Thus, the proposed method performs inside-body 3-D localization by utilizing the inherent image reconstruction function of the ultrasound endoscope, and is able to be used with currently available commercial ultrasound image scanners. The system may be envisaged as a kind of global positioning system for intrabody navigation. 相似文献