摘要：The multi-dimensional spaces, spanned by the dimensionless numbers describing the equilibrium states or the macroscopic chemical kinetics of complicated chemical reaction systems, have been used for the data processing of the process-es in materials preparation or industrial production. It has been found that there are four common topological types of the rela-tions between the optimization zone and the operation zone in the multi-dimensional spaces. Various computation methods us-ing pattern recognition, artificial neural network and genetic algorithm are used for model-building and optimization strategy searching. An integrated system named KDPAG has been built for materials optimal design or industrial optimization. Appli-cation to chemical, petrochemical and metallurgical industries and materials optimal design gives good results.

摘要：Role based access control is one of the widely used access control *** are investigations in the literature that use knowledge representation mechanisms such as formal concept analysis(FCA),description logics,and Ontology for representing access control ***,while using FCA,investigations reported in the literature so far work on the logic that transforms the three dimensional access control matrix into dyadic formal *** transformation is mainly to derive the formal concepts,lattice structure and implications to represent role hierarchy and constraints of *** this work,we propose a methodology that models RBAC using triadic FCA without transforming the triadic access control matrix into dyadic formal *** discussion is on two lines of *** present how triadic FCA can provide a suitable representation of RBAC policy and we demonstrate how this representation follows role hierarchy and constraints of RBAC on sample healthcare network available in the literature.

摘要：动脉组织的力学性能对于维持心血管健康具有重要意义,并与心血管相关疾病的发生发展密切相关。主动脉腹侧和背侧组织力学性能之间存在显著差异,但缺乏量化的力学性能参数,且其成因尚不清楚。本文以猪降主动脉腹侧与背侧组织为研究对象,通过双轴拉伸方法获取应力-应变曲线,分析组织正交各向异性,采用Gasser-Ogden-Holzapfel型应变能函数描述动脉组织力学性能参数,采用Elastic Van Gieson(EVG)法和天狼星红染色法观测动脉组织弹性纤维和胶原纤维显微结构。结果表明,与降主动脉腹侧组织相比,降主动脉背侧组织表现出更明显的正交各向异性,且在周向上的弹性模量明显大于降主动脉腹侧组织。降主动脉腹侧和背侧组织的超弹本构参数之间差异均无统计学意义,但几乎所有降主动脉组织的纤维角度都小于0.785 rad(45°),胶原纤维的排列更趋于周向。EVG和天狼星红染色显示降主动脉腹侧外-中膜弹性纤维层密度明显高于背侧组织,外-中膜胶原纤维背侧多于腹侧。结果提示,猪降主动脉背侧组织与腹侧组织之间的力学性能差异与外-中膜组织中的微观结构有关。在相对较小的应变范围内,可忽略降主动脉腹侧与背侧组织力学性能的差异;当应变较高时,则需区别对待。本研究结果可为动脉疾病(如动脉夹层)的成因以及人工血管设计等提供数据参考。

摘要：分析中国艺术体操集体项目在奥运会预选赛上失利的原因如下 :动作编排不完美 ;完成质量不高 ;基本功不扎实 ;战术准备不充分。

摘要：The cryogenic ground support equipment (CGSE) is an important part of Alpha Magnetic Spectrometer-02 (AMS-02) experiment which is a particle physics experiment. CGSE is used to cool down the superconducting magnet of AMS-02 to its operating temperature of 1.8K and to fill the magnet helium tank with superfluid helium. This paper introduces the control system of CGSE and presents the performance of the system.

摘要：利用相关分析方法 ,详细讨论了作用于水工建筑物的平面、柱面和球面上的边壁脉动压力的点面转换关系 ,推导出面脉动荷载的解析表达式 .

摘要：设计任何一种加热器时,都必须确定相关装置所产生的加热功率,据此确定感应加热器的结构尺寸。此外,还必须通晓加热器的结构参数及制作加热器的材料的物理性能对其释热强度的影响。为此,必须建立数学模型,用于确定在感应器的作用下换热器所发出的功率,用数学方法对之进行研究。

摘要：为研究纵向通风对火灾及烟气蔓延的影响,搭建了缩尺寸隧道火灾试验台,分析隧道内拱顶温度及火焰倾斜角随风速和火源功率变化的一般规律。研究结果表明:在同一火源功率作用下,隧道内顶棚温度随着纵向通风速度的增加而降低;火焰的倾斜角随风速的增大而增大;火焰的倾斜程度与火源功率有关;火焰向下游偏斜加大了火焰触及下游可燃物的可能性;实验结果与K urioka模型符合较好。

摘要：随着石油生产技术的进步及其复杂程度的提高 ,井场科学计量是十分必要的。常规的压力检测仪表不适合井场的安装应用条件 ,经常遭到坡坏 ,因而设计新型的井口压力检测仪有其实用价值。文章主要介绍用于井口压力检测的存储式数字压力检测仪的电路设计原理。叙述了整机原理构成、模数转换 (A/ D)的电路工作原理。

摘要：在福岛核事故核安全问题倍受核工业界及核监管当局重视,蒸汽爆炸是对安全壳完整性的最重要威胁,也对采取堆内熔融物滞留(IVR)造成重大影响,因而成为国内外研究的热点。本文在对蒸汽爆炸机理与现象调研的基础上,使用法国辐射防护研究院(IRSN)开发的MC3D软件对国内自主设计核电厂华龙一号核电厂压力容器外蒸汽爆炸现象进行分析,并对设计方计算结果进行独立计算,所得出的结果验证了设计方的计算,为制定华龙一号核电厂严重事故管理策略提供参考。