基于分形方法估算部分商为a或b的连分数集维数

连分数的展开式具有结构上的自相似性,部分商满足一定条件的连分数构成的集合是分形集,通过构造迭代映射的方法估算其Hausdorff维数.     

平等问题的哲学思考

一方面,每个人因其最基本的贡献完全平等——每个人一生下来便都同样是缔结、创建社会的一个股东——而应该完全平等地享有基本权利、完全平等地享有人权,可以名之为完全平等原则;另一方面,每个人因其具体贡献的不平等而应享有相应不平等的非基本权利,也就是说,人们所享有的非基本权利的不平等与自己所做出的具体贡献的不平等比例应该完全平等,可以名之为比例平等原则。社会所提供的发展才德、做出贡献、竞争职务和地位以及权力和财富等非基本权利的机会,是全社会每个人的基本权利,是全社会每个人的人权,应该人人完全平等。反之,家庭、天赋、运气等非社会所提供的机会,则是幸运者的个人权利,无论如何不平等,他人都无权干涉;但幸运者利用较多机会所创获的较多权利,却因较多地利用了共同资源＂社会合作＂而应补偿给机会较少者以相应权利。这就是机会平等原则。     

脉冲中立型时滞抛物偏微分方程组的振动准则

讨论了一类脉冲中立型时滞抛物偏微分方程组的振动性质,运用脉冲微分不等式和积分的方法,获得了其所有解振动的一些充分条件.     

信用衍生品交易的博弈分析

信用衍生品将信用风险从风险债券或贷款的持有者转移到第三方的金融合同，能有效地帮助银行化解信用风险。本文通过对信用衍生品交易基本模型博弈进行分析，发现信用衍生品能扩大交易双方得益，使双方处于交易的均衡状态。但是在引入交易成本和信息不对称因素后，可以看到这些因素会影响交易的效率，严重时甚至会导致交易失败。     

信息咨询半虚拟团队及其管理

本文介绍了信息咨询半虚拟团队的组织设想、半虚拟团队的促建因素,以及采用半虚拟团队的益处和优势。探讨了信息咨询半虚拟团队管理所涉及的主要方面,并提出需要深入探讨的几个相关问题。半虚拟团队理念为研究和发展信息咨询业务提供了一个良好的契机。     

Parallel operation characteristics analysis of sewage source heat pump units in winter

Sewage source heat pump unit operates under partial load most of the time, and study on the law of coefficient of performance (COP) of the unit varying with load ratio can provide basis for the heat pump units running in high efficiency. A mathematical model determining COP, evaporation temperature and condensation temperature of a single unit was proposed. Under the condition of uniform load distribution, the model was established according to different ways of bearing partial load with the same type multiple units but different parallel operation models, and the operation characteristics of units were analyzed as well. Results show that the single screw water-source heat pump can maintain high COP only at 60%—100% load ratio, COP decreases sharply with the decrease of load ratio, and the units with parallel operation are controlled by the load ratio of a single unit according to the reduction of total load which can keep the average COP at high level within a wide load range.     

金融衍生工具在利率风险管理中的应用

本文研究了金融衍生工具的信息特性与套期保值功能在利率风险管理中的应用。全文分为四部分,第一部分界定了金融衍生工具的概念。第二部分分析了金融衍生工具的信息特性及其在利率走势预测中的作用。第三部分分析了套期保值功能在利率风险管理中的作用。第四部分为金融衍生市场风险分析及对不同保值方案的定量分析。     

松嫩平原土壤有机质含量高光谱反演研究

采集松嫩平原典型类型土壤样本252个.室内条件下测定了风干后土样的光谱.对原始光谱数据作预处理后,分别运用多元线性逐步回归法和偏最小二乘法建立土壤有机质含量高光谱预测模型.结果表明,采用2种方法建立的模型均可满足有机质含量速测要求,但偏最小二乘法得到的模型更具稳健性.     

某几类数值积分的计算

采用递归迭代法解决了某几种数值积分的计算问题，该方法比采用传统的复化的梯形公式、复化的辛浦生公式来得快，更精确，容易达到要求的精度。     

Evaluation of the antioxidant effects of four main theaflavin derivatives through chemiluminescence and DNA damage analyses

Theaflavins (TFs) are the dimers of a couple of epimerized catechins, which are specially formed during black tea fermentation. To explore the differences among four main TF derivatives (theaflavin (TF₁), theaflavin-3-gallate (TF₂A), theaflavin-3′-gallate (TF₂B), and theaflavin-3,3′-digallate (TF₃)) in scavenging reactive oxygen species (ROS) in vitro, their properties of inhibiting superoxide, singlet oxygen, hydrogen peroxide, and the hydroxyl radical, and their effects on hydroxyl radical-induced DNA oxidative damage were systematically analyzed in the present study. The results show that, compared with (−)-epigallocatechin gallate (EGCG), TF derivatives were good antioxidants for scavenging ROS and preventing the hydroxyl radical-induced DNA damage in vitro. TF₃ was the most positive in scavenging hydrogen peroxide and hydroxyl radical, and TF₁ suppressed superoxide. Positive antioxidant capacities of TF₂B on singlet oxygen, hydrogen peroxide, hydroxyl radical, and the hydroxyl radical-induced DNA damage in vitro were found. The differences between the antioxidant capacities of four main TF derivatives in relation to their chemical structures were also discussed. We suggest that these activity differences among TF derivatives would be beneficial to scavenge different ROS with therapeutic potential.