连续凸偏好的一个性质

偏好与效用是联系在一起的。如果一种商品对于消费者没有效用，消费者就不会产生对这种商品的偏好，对偏好的研究为人们对效用进行定量的描述与研究奠定了基础。本文给出连续凸偏了的一个性质的严格证明。     

Dynamic analysis of C/C composite finger seal

A seal device as an important component of aeroengines has decisive influence on per- formance, reliability, and working life of aeroengines. With the development of aeroengines, demands on the performance characteristics of seal devices are made strictly. Finger seal as a novel kind of sealing device, recently attracts more and more attentions in academic circles and engineer- ing fields at home and abroad. Research on finger seals has been extensively developed, especially on leakage and wear performances under dynamic conditions. However, it is a pity that the work on finger seals has been limited with a single approach that is improving the performance by structural optimization; in addition, the technology of dynamic analysis on finger seals is weak. Aiming at the problems mentioned above, a distributed mass equivalent dynamic model of finger seals considering the coupling effect of overlaid laminates is established in the present paper, the dynamic perfor- mance of 2.5 dimension C/C composite finger seal is analyzed with the model, and then the effects of fiber bundle density and fiber bundle preparation direction on finger seal＇s dynamic performance are discussed, as well as compared with those of Co-based alloy finger seal. The current work is about dynamic analysis of finger seals and application of C/C composite in this paper may have much academic significance and many engineering values for improving research level of finger seal dynamics and exploring feasibility of C/C composite being used for finger seals.     

论审美价值取向对80后大学生自我态度性格特征的影响

以美学为视角,从性格成因、审美价值取向特点两个方面分析了80后大学生自信与自卑、谦虚与自负、大胆与怯懦、私利心与同情心、豁达大方与敏感多疑、诚实与虚伪等矛盾性格特征,探讨了审美价值取向对80后大学生自我态度性格特征的影响.     

以社会主义核心价值观统摄“普世价值”论争

找准“普世价值”论争的症结,需要对“普世价值”进行具体的分析,认清西方国家宣扬的“普世价值”实质。为了凝聚全国人民的磅薄力量,我们要大力弘扬社会主义核心价值观,以此统摄“普世价值”的论争。     

新春寄语

时光荏苒,岁月如梭。过去的一年是极富历史意义的一年,伟大的中国共产党喜迎建党90周年生日,新中国航空工业走过60年风雨历程。在即将到来的2012年,《航空标准化与质量》也将迎来创刊40周年。在这"不惑"之年,期刊将继续传承科研价值体现、客户层面思     

考虑条件风险价值的含多风电场电力系统经济调度

针对单一Copula函数在描述风速相关性时的限制性,通过引入mixCopula函数获取具有相关性的多维风速样本。引入条件风险价值理论,将风电功率的不确定性以经济性考量,建立了一种含多风电场的电力系统经济调度模型,协调经济性和安全性的问题。采用场景化理论对目标函数进行处理,使得计算得以简化。以含2个风电场的IEEE30节点系统为算例,分析风速相关性和置信水平对优化结果的影响,验证模型的合理性及有效性。     

历史建筑的价值探讨

随着我国经济的发展、社会环境的变迁、公共建设的推动以及土地的开发,许多具有传统风貌的历史建筑,在追求现代化的价值观中屡遭拆除或破坏,许多历史记忆空间正逐渐失去.推土机式的建设破坏愈演愈烈,随之而去的是珍贵的社会文化遗产和建筑艺术,以及宝贵的旅游资源.论文以历史建筑的价值为研究对象,探讨历史建筑的空间体验价值、空间场域价值以及空间属性价值.