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排序方式: 共有336条查询结果,搜索用时 324 毫秒
1.
Seredin P. V. Radam Ali Obaid Goloshchapov D. L. Len’shin A. S. Buylov N. S. Barkov K. A. Nesterov D. N. Mizerov A. M. Timoshnev S. N. Nikitina E. V. Arsentyev I. N. Sharafidinov Sh. Kukushkin S. A. Kasatkin I. A. 《Semiconductors》2022,56(4):253-258
Semiconductors - Abstract—In our work, we carry out a structural-spectroscopic study of AlGaN/GaN epitaxial layers grown by molecular-beam epitaxy with nitrogen-plasma activation on a hybrid... 相似文献
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Memorializes Richard Solomon, one of the major learning theorists of the 2nd half of the 20th century. Solomon was named the 1st James M. Skinner University Professor of Science in 1975, was elected to the National Academy of Sciences, and was awarded, among other honors, the Warren Medal for research by the Society of Experimental Psychologists, the American Psychological Association Distinguished Scientific Contribution Award, and the American Psychological Foundation's Award for Distinguished Teaching in Experimental Psychology. He conducted research on a broad array of topics such as word frequency and perceptual defense, children's estimation of the size of tokens, hoarding behaviors in rats, and personality ratings and sociometric patterns. His work made a major contribution to the exploration of Pavlovian conditioning. Other topics of research focused on in Solomon's laboratories included avoidance learning, learned helplessness, punishment, and the opponent-process theory of acquired motivation. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
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Adam Beguelin Erik Seligman Peter Stephan 《Journal of Parallel and Distributed Computing》1997,43(2):2078
We have explored methods for checkpointing and restarting processes within the distributed object migration environment (Dome), a C++ library of data parallel objects that are automatically distributed over heterogeneous networks of workstations (NOWs). System level checkpointing methods, although transparent to the user, were rejected because they lack support for heterogeneity. We have implemented application level checkpointing which places the checkpoint and restart mechanisms within Dome's C++ objects. Application level checkpointing has been implemented with a library-based technique for the programmer and a more transparent preprocessor-based technique. Dome's implementation of checkpointing successfully checkpoints and restarts processes on different numbers of machines and different architectures. Results from executing Dome programs across a NOW with realistic failure rates have been experimentally determined and are compared with theoretical results. The overhead of checkpointing is found to be low, while providing substantial decreases in expected runtime on realistic systems. 相似文献
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Shye Lin Wu Chung Len Lee Tan Fu Lei Chen C.F. Chen L.J. Ho K.Z. Ling Y.C. 《Electron Device Letters, IEEE》1994,15(4):120-122
In this study, it is demonstrated that the incorporation of fluorine can enhance poly-Si/Si interfacial oxide break-up in the poly-Si emitter contacted p+-n shallow junction formation. The annealing temperature for breaking up the poly-Si/Si interfacial oxide has been found to be as low as 900°C. As a result, the junction depth of the BF2-implanted device is much larger than that of the boron-implanted device 相似文献
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Pd-Ge based ohmic contact to n-GaAs with a TiW diffusion barrier was investigated. Electrical analysis as well as Auger electron
spectroscopy and the scanning electron microscopy were used to study the contact after it was subjected to different furnace
and rapid thermal annealing and different aging steps. All analyses show that TiW can act as a good barrier metal for the
Au/Ge/Pd/n-GaAs contact system. A value of 1.45 × 10−6 Ω-cm2 for the specific contact resistance was obtained for the Au/TiW/Ge/Pd/n-GaAs contact after it was rapid thermally annealed
at 425°C for 90 s. It can withstand a thermal aging at 350°C for 40 h with its ρc increasing to 2.94 × 10−6Ω-cm2 and for an aging at 410°C for 40 h with its ρc increasing to 1.38 × 10−5 Ω-cm2. 相似文献
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Len Sherman 《电子设计技术》2004,11(3):168-170
便携式设备,如PDA、智能电话和数码相机等在使用电池供电时具有特殊的电源管理要求,效率指标固然重要,而来自尺寸和价格方面的压力也要通过不同的设计加以平衡,这些实际要求都不同于笔记本电脑等电池供电设备的设计.除了对尺寸和重量的限制外,手持产品还需解决散热问题.这些产品中不可能安装风扇,也不可能容忍较高的温度,如果这些问题得不到解决,对元件尺寸的苛刻要求很难使其达到适当的效率,同时,小型电池需要严格的电源管理,上述因素都是当电源集成在系统内部时所要考虑的. 相似文献
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Chang Fon-Chieh Hull John R. Beitelman Len 《Metallurgical and Materials Transactions B》2004,35(6):1129-1137
A numerical simulation was performed for a novel electromagnetic stirring system that employs two rotating magnetic fields.
The system controls stirring flow in the meniscus region of a continuous casting mold independently from the stirring induced
within the remaining volume of the mold by a main electromagnetic stirring (M-EMS) system. This control is achieved by applying
to the meniscus region an alternating current-stirring modifier (AC-SM) whose direction of rotation is opposite to that of
the main magnetic field produced by the M-EMS. The model computes values and spatial distributions of electromagnetic parameters
and fluid flow in stirred pools of mercury in cylindrical and square pools. Also predicted are the relationships between electromagnetics
and fluid flows pertinent to a dynamic equilibrium of the opposing stirring swirls in the meniscus region. Results of the
numerical simulation compared well with the measurements obtained from experiments with mercury pools. 相似文献
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