酸岩反应动力学方式与酸溶蚀行为关系的理论判别

酸岩反应动力学方式与酸溶蚀行为之间关系的理论判别，对更好地实施油井酸化增产技术有重要意义。本文在前文工作基础上通过酸液在多孔介质毛细管内的层流传质与反应问题的求解，提出了受对流传质、扩散传质以及表面反应控制的动力学相互转化的一套临界判据，可在一定程度上对酸岩反应动力学方式与酸溶蚀行为之间的关系作出理论判别。     

信息安全评估标准的研究和比较

信息安全评估标准是对信息安全产品或系统进行安全水平测定、评估的一类标准，本文介绍了国内外现有的信息安全评估标准．并对这些标准的特点、应用方式、适用范围和实用价值进行了详细的比较、讨论；最后研究了安全评估标准中面临的问题及进一步完善方法。     

Impact of design methods on decision support systems success: An empirical assessment

Many of the Decision Support Systems (DSS) developed and implemented in the last decade or so, have not been used or are only used for mundane report generation rather than for direct support of strategic planning. These failures can be attributed to the fact that existing DSS design methods (representation-based, evolutive, and adaptive) have never been evaluated with respect to their success. Thus, the designer had no way of knowing what design method to employ in developing an effective DSS.This paper investigated the relationship between the selection of a DSS design method and its ultimate success. DSS success was measured through DSS usage, user satisfaction, and user attitudes and perceptions criteria. The data utilized was collected from individuals responsible for designing and evaluating DSS, specifically the managers, intermediaries, and designers. In terms of the DSS usage and user satisfaction criteria, all three groups rated the evolutive design method superior, followed by the representation-based and adaptive methods. Using the DSS attitudes and perceptions criteria, the designer group rated the evolutive method best, followed by the representation-based, and adaptive methods. The ratings by the managers and intermediaries were rather mixed. Each design method did better in some success criteria than in others.     

Comparison among three analytical methods for knowledge communities group-decision analysis

Knowledge management can greatly facilitate an organization’s learning via strategic insight. Assessing the achievements of knowledge communities (KC) includes both a theoretical basis and practical aspect; however, a cautionary word is in order, because using improper measurements will increase complexity and reduce applicability. Group decision-making, the essence of knowledge communities, lets one considers multi-dimensional problems for the decision-maker, sets priorities for each decision factor, and assesses rankings for all alternatives. The purpose of this study is to establish the objective and measurable patterns to obtain anticipated achievements of KC through conducting a group-decision comparison. The three multiple-criteria decision-making methods we used, simple average weight (SAW), “Technique for Order Preference by Similarity to an Ideal Solution” (TOPSIS) and “VlseKriterijumska Optimizacija I Kompromisno Resenje” (VIKOR), are based on an aggregating function representing “closeness to the ideal point”. The TOPSIS and VIKOR methods were used to highlight our innovative idea, academic analysis, and practical appliance value. Simple average weight (SAW) is known to be a common method to get the preliminary outcome. Our study provides a comparison analysis of the above-three methods. An empirical case is illustrated to demonstrate the overall KC achievements, showing their similarities and differences to achieve group decisions. Our results showed that TOPSIS and simple average weight (SAW) had identical rankings overall, but TOPSIS had better distinguishing capability. TOPSIS and VIKOR had almost the same success setting priorities by weight. However, VIKOR produced different rankings than those from TOPSIS and SAW, and VIKOR also made it easy to choose appropriate strategies. Both the TOPSIS and VIKOR methods are suitable for assessing similar problems, provide excellent results close to reality, and grant superior analysis.     

基于不同规范的1000MW汽机基础数值分析

随着我国在汽机基础设计上引进吸收国外技术的脚步加快和力度加强,越来越多地涉及到国内标准和国际标准的协调统一问题.本文首先介绍了《动力机器基础设计规范》和STIM标准的区别,然后以国内某1 000MW机组基础为例,分别针对两套标准建立数值模型,并进行了模态分析和强迫振动响应分析.结果显示由于2套标准在诸多方面有较大差异,分析结果不存在一致性,应通过实测来进一步判断二者的合理性与精确性.     

龙岩市见龙桥立交方案构思和选型探讨─兼论小城市立交选型

通过龙岩市见龙桥立交工程实例，探讨中、小城市立交选型的原则和设计标准。     

浅谈固体推进剂燃烧催化剂的评判标准

<正>1燃烧催化剂的技术内涵固体推进剂的燃烧性能调节是实现其工程化应用的必要途径。燃烧催化剂作为固体推进剂的核心功能组分,可在调节固体推进剂燃速,控制能量释放和羽流特征信号等方面起重要作用。目前,对固体推进剂燃烧催化剂的研究主要包括四方面:一是设计制备新型多功能燃烧催化材料并表征其结构和稳定性;二是评估新型催化剂与推进剂组分的相容性和安定性;三是分析燃烧催化剂对推进剂主要组分的催化热分解动力学及机理;四是探讨催化条件下固体推进剂的燃速压力指数、火焰结构与燃烧波温度的变化规律(Q L Yan,F     

诱导条件下节理岩体流变断裂自然崩落判据研究

对诱导条件下节理岩体流变断裂问题进行了深入研究,归纳出了节理岩体流变断裂3类不同破坏机制,确定了以分支裂纹扩展长度作为节理岩体破坏评判依据的3种破坏机制时的统一流变断裂破坏准则。在此基础上,首次提出了节理岩体在重力作用下产生自然崩落的3个必要条件为破坏条件、临空面条件和平衡条件,并推导和建立了岩体流变断裂破坏和自然崩落的判据数学表达式,最后将研究成果转化成了计算机程序,为流变断裂型矿岩自然崩落规律研究和崩落速度预测提供了一条新的有效方法。     

地下结构顶板爆破振动的动态应力比评价研究

针对传统动态应力比评价标准仅评价地下结构物可见损伤的不足,将爆破震动扰动下引起岩体内纵波波速变化这一因素考虑进去,从而把动态应力比评价标准扩充到了对岩体内部不可见损伤的评价,补充了原有标准的不足,从而为进一步加强地下结构顶板稳定性管理提供了相当有用的依据。     

程序化的建筑生物--渡边诚设计的东京饭田桥站地铁车站

该文以的东京饭田桥站地铁车站为例,和步探讨了日本建筑师渡边诚的设计思想和设计方法。