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1.
Preliminary design of in-pile high temperature high pressure (HTHP) test loop is one of application items at China Advanced Research Reactor (CARR). The design content is to confirm design parameter, the system flow, standard equipments and layout of equipments according to permitting construction space, specific request of pipeline and equipment for test loop. The files about regulation and general outline are compiled and relative tests are presented. 相似文献
2.
Expressing First-Order pi-Calculus in Higher-Order Calculus of Communicating Systems 总被引:1,自引:0,他引:1 下载免费PDF全文
Xian Xu 《计算机科学技术学报》2009,24(1):122-137
In the study of process calculi, encoding between different calculi is an effective way to compare the expressive power of calculi and can shed light on the essence of where the difference lies. Thomsen and Sangiorgi have worked on the higher-order calculi (higher-order Calculus of Communicating Systems (CCS) and higher-orderπ-calculus, respectively) and the encoding from and to first-orderπ-calculus. However a fully abstract encoding of first-orderπ-calculus with higher-order CCS is not available up-tod... 相似文献
3.
Li Xueyi Jiang Hong Chen Song Wang Xiaochun School of Mechanical Engineering Xian Jiaotong University Xian China 《计算机辅助绘图.设计与制造(英文版)》2003,(Z1)
1 Introduction Finding out proper starting points for all the intersection curves between two surfaces is a key process in numerical tracing methods for surface-surface intersection (SSI) problems. A number of methods [1] are introduced to calculate the starting points. Cugini et al. [2] introduced the concept of shrinking bounding boxes to calculate starting points. This method is simple and in some cases effective, but it may miss some intersection components. Muellenheim [3] presented an… 相似文献
4.
篮球是我国高校中最为普及的运动方式之一,而网球作为兴起的一项体育项目在高校中也受到了广大师生的追捧。本文对比高校网球文化与篮球文化的区别得出结论:高校中网球场馆、篮球场馆比例及利用率;相关比赛、活动开展的次数、规模;经济投入三方面差别。并且得出结论网球在高校得到更好的开展与发展可从加大宣传力度、加强师资队伍建设、加强管理三个方面入手。 相似文献
5.
MA Yong-zhe WANG Hua-rong XU Xian ZHANG Pei-sheng 《中国原子能科学研究院年报》2006,(1):151-152
This paper introduces design and manufacture of fuel assembly for UO2 pellets irradiation program. The advanced UO2 pellet is large grained and is sintered with addictives of Al2O3/SiO2/Cr2O3. It will decrease the release rate of fission gas, reduce the PCI and inner pressure of the fuel rods, in result it will increase discharge bumup and extend loading period of fuel rod. The performance of large grain pellet must be proved through in-pile test. 相似文献
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7.
HUANG Yi & WANG Xiaogang . School of Civil Engineering Xian University of Architecture & Technology Xian China . Department of Civil Engineering Qinghai University Xining China Correspondence should be addressed to Huang Yi 《中国科学E辑(英文版)》2004,47(5):526-549
The dynamic analysis of saturated poroelastic media is significant in many areas such as seismology, earthquake engineering, soil mechanics and geophysics. In 1956, Biot[1—3] first developed the dynamic equations for saturated poroelastic media. He also discussed systematically the propagation of waves in such two-phase media and further predicted the existence of the slow longitudinal wave. Biots work is consummate while the two formal parameters he introduced are difficult to measure. In t… 相似文献
8.
MA Dejun Chung Wo Ong LIU Jianmin & HE Jiawen . Surface Engineering Research Institute CMES Beijing China . Department of Applied Physics Materials Research Center The Hong Kong Polytechnic University Hong Kong China . State Key Laboratory for Mechanical Behavior of Materials Xian Jiaotong University Xian China 《中国科学E辑(英文版)》2004,47(4):398-408
Loadanddepthsensingindentationtechniqueisveryusefulinprobingthemechanicalpropertiesofmaterialsonsmallscales[1—5].Youngsmodulusisoneofthemostcommonlyconcernedmaterialpropertiesmeasuredbythiskindoftechnique.Conventionally,itisachievedonthebasisofthemethodproposedbyOliverandPharr[4]usingthewell-knownrelationship:whereSuistheinitialslopeofunloadingcurve,EristhereducedmodulusandrelatedwiththeYoungsmodulusEandPoissonsratioνoftheindentedmaterialandthose(Ei,ni)oftheindenterbytheequation1/Er=(1-n2… 相似文献
9.
Based on the MAS rolling process in plate mill, the mathematical models of forward and backward slips of the wedges at plate head and tail were derived. According to the new model, the difference between the forward slip of the wedge and that of the normal part of the plate is obviously very small. The deviation is less than 25% in general. Thus, in actual application, the forward slip of normal part of the plate can be used to calculate the length of rolled plate instead of the derived model. The rationality of this simplified method was confirmed with the application in Shougang 3 500 mm plate mill. The test results showed that the wedges of plate head and tail are symmetrical. The plate width deviation is greatly decreased by using the MAS method. 相似文献
10.
Heat transfer and deformation of initial solidification shell in soft contact continuous casting mold under high frequency electromagnetic field were analyzed using numerical simulation method; the relative electromagnetic parameters were obtained from the previous studies. Owing to the induction heating of a high frequency electromagnetic field (20 kHz), the thickness of initial solidification shell decreases, and the temperature of strand surface and slit copper mold increases when compared with the case without the electromagnetic filed. The viscosity of flux decreases because of the induction heating of the high frequency electromagnetic field, and the dimension of the flux channel increases with electromagnetic pressure; thus, the deformation behavior of initial solidification shell was different before and after the action of high frequency electromagnetic field. Furthermore, the abatement mechanism of oscillation marks under high frequency electromagnetic field was explained. 相似文献