三种动力学多参数估值方法统计特性的研究

本文运用一种在计算值中加入随机误差作为实验数据的效学实验方法,以三元M~α拟一级反应体系为例,研究了三种能够用于复杂反应动力学双曲型数学模型多参数估值的方法的统计特性,并进行了比较。结果表明,试差矩阵法比特征向量法有更好的方法统计特性,能耐受较大的实验误差,获得令人满意的参数值。曲线拟合法统计特性低劣,实验误差对模型参数估值准确度的影响较大,不能很好地用于复杂反应体系动力学的多参数估值。     

直线圆弧相贯处理的新算法

本文介绍了一个用于二维平面图形的直线、圆弧相贯处理的新算法。文中阐述了它的一些基本设计思想和处理原则。     

Robust Recommendation Algorithm Based on Kernel Principal Component Analysis and Fuzzy C-means Clustering

The existing recommendation algorithms have lower robustness in facing of shilling attacks. Considering this problem, we present a robust recommendation algorithm based on kernel principal component analysis and fuzzy c-means clustering. Firstly, we use kernel principal component analysis method to reduce the dimensionality of the original rating matrix, which can extract the effective features of users and items. Then, according to the dimension-reduced rating matrix and the high correlation characteristic between attack profiles, we use fuzzy c-means clustering method to cluster user profiles, which can realize the effective separation of genuine profiles and attack profiles. Finally, we construct an indicator function based on the attack detection results to decrease the influence of attack profiles on the recommendation, and incorporate it into the matrix factorization technology to design the corresponding robust recommendation algorithm. Experiment results indicate that the proposed algorithm is superior to the existing methods in both recommendation accuracy and robustness.     

Self-determinate evaluation method based on condition of weights non-dictatorial rate

The condition of weightes non-dictatorship is extended and a comprehensive evaluae method emboding self-determinate which is combined with competitive view optimization principles is built. The basic process includes simulating the model of economic man's self-benefit bahaviors, taking the place of experts to evaluate, bringing in the model of minimizing the sum of included angles to integrate the information of multiple objects and put the objects in order finally. The method has the advangtages of less dependendence on the subjective information, plenty of information, fair process and simple caculating. Finally, an application example is given to illustrate the effectiveness of the proposed method.     

历史叙述中历史学家的主观性与个人情感研究

历史叙述是指历史学家按照如实叙述的原则，写作历史著作的过程。无论是秉笔直书的原则，还是对史料的选择与甄别，历史叙述都是一项历史学家主观参与的实践活动。历史叙述中存在着历史学家个人的情感，反映了历史学家对历史人物的赞扬与批判，蕴含了历史学家个人的价值判断原则。历史学家在历史叙述中的主观性与个人情感，将影响主体对史料的选择，甚至影响所述史实的正误。历史学家通过历史叙述对历史人物的评价来传递个人的主观情感，进而教育与引导读者的行为。     

Numerical modeling of annular electromagnetic stirring with intercooling in direct chill casting of 7005 aluminum alloy billet

Uniform direct chill(UDC) casting method was developed by combining annular electromagnetic stirring(AEMS) with intercooling in direct chill casting. In order to investigate effect of UDC on flow patterns, temperature profiles and solidification during the casting, a numerical model of the UDC casting process was developed and used to simulate the UDC casting process for preparing 7005 aluminum alloy billets. The comparison of the calculated results of UDC casting with normal direct chill(NDC) casting indicated that flow patterns, temperature profiles and the sump depth are modified remarkably by the application of annular electromagnetic stirring and intercooling during the direct chill casting. The sump profile and the temperature history during UDC casing were studied, and the mechanism of the casting process were discussed. The comparisons between the simulations and experimental results suggested that the proposed model provides good agreement for the sump profiles and the temperature history within the billets.     

具有激励特征的科技人才需求预测方法

针对经济体制转换时期的特殊情况，提出了具有激励特征和动态特征的科技人才需求预测方法，并对Ｌ省Ｓ市２０００￣２０１０年科技人才需求量及具有预期学历结构约束的人才补充量进行了预测。     

余切丛上判定辛向量场的等价命题

本给出了另一个判定余切丛上辛向量场的命题，并指出这个命题与原有的两个命题是等价的，最后用新判定方法对几个具体的向量场是或不是辛向量场作出判断。     

相转化法制备聚醚酰亚胺超滤膜

以不同相对分子质量的聚乙二醇（ＰＥＧ）作为添加剂，讨论了聚醚酰亚胺（ＰＥＩ）和ＰＥＧ混合的相行为，对于ωＰＥＩ＝０．２０的Ｎ，Ｎ－二甲基乙酰胺（ＤＭＡＣ）溶液，测定了多种非溶剂的相混合参数，其值的顺序为：乙醇〉甲醇〉乙二醇〉水。以及为凝固介质，制备了ＰＥＩ超滤膜，考察了水通量，牛血清蛋白ＢＳＡ的膜分离性能，此外，结合膜的电镜照片，探讨孙同相对分子质量ＰＥＧ对膜结构的影响。     

大规模气泡湮灭的元胞自动机模拟

使用元胞自动机模型,并用正六边蜂房结构代替二维均匀气泡,模拟气泡载荷超过临界载荷时大规模二维气泡湮灭过程.结果表明,该过程存在Zipf律.