For purpose of the characteristic of open - up fund , this article proposes three asset management methods , furthermore it also talk about the investment strategy of open - up fund under the environment of china security market 原文:本文针对开放式基金的特点，从风险和收益平衡的角度提出了其资产管理可采用的三种方法：赎回比率法，随机模式法和持有人清单法，并进一步阐述了现实我国证券市场制度环境下开放式基金的运作策略。
To derive the accumulated daily evapotranspiration from remotely sensed instantaneous evaporation rate is a key step to use this kind of information in other domains . so - called simplified methods and self - preservation methods were introduced and compared , and a self - preservation method was validated using field and remote sensing data 论文的最后部分讨论了从瞬时蒸散速率推算日蒸散量的方法，介绍了简化法和蒸发比率法的基本思路，分析了存在的主要问题，并用地面数据和遥感数据验证了蒸发比率法中以长波上行辐射作为分母的方法，结果表明方法可行，精度基本可以满足要求。
The evaluation and regulation of insurance company ’ s solvency is not only the key point of insurance theory , but also the precondition and foundation of the prosperous and healthy development of china ’ s insurance industry . so developing and perfecting the regulation of insurance company ’ s solvency in china enjoys great practical meanings . firstly , the paper reviews the recognition history of insurance company ’ s solvency , discusses the economic meaning of solvency and clarifies the scope of research and discussion by raising the definition of insurance solvency 首先阐述偿付能力监管的相关理论,然后采用中国主要中资财险公司2001年- 2003年的经营数据、运用固定比率法从理论上测算最低偿付能力额度,并将测算结果与法定偿付能力额度比较分析,最后在比较借鉴发达国家偿付能力监管体系及监管方法的基础上,分别从监管机构、保险公司、保险市场和行业协会及社会监督等角度提出完善中国保险公司偿付能力监管的建议。
Abstract : based on the analysis of the mathematics models of saturation steam density and superheat steam density the paper states that the deviation of the detection on temperature highly affects the accuracy of intelligent flow totalizer . especially for saturation steam ， the accuracy of the temperature detection circuit shall be designed higher than the accuracy of the instrument . thus a temperature detection circuit based on ratio method with high accuracy is introduced 文摘:在分析饱和蒸汽和过热蒸汽密度的数学模型的基础上指出，温度检测的偏差对智能流量积算仪的精度影响极大，尤其是饱和蒸汽，测温电路的精度应设计为远高于仪表的精度，同时引入一种基于比率法的高精度测温电路。
The minimum square method was used in regressing analysis for the result of treatment in a supposed distribution function , the " d " examination method was used for weibull distribution and index distribution , and obtained the distribution type in the life of the main shaft bearings , appraised the reliability life , the mean life and the reliability in 500hours of the main shaft bearings with theoretical distribution function 用残存比率法、平均故障法和累积故障法对主轴轴承可靠寿命进行了评估，用最小二乘法对现场数据统计处理结果进行了假设分布的回归分析，并用d检验法对威布尔分布和指数分布进行了分布检验，得出主轴轴承寿命分布类型。利用理论分布函数，对主轴轴承可靠寿命、平均寿命、 500小时的可靠度进行了评估。
