保险中的数学建模

保险已成为当今社会的时尚。本文以人们对寿险的需求为背景，运用数学建模分析方法，给出选择合适险种的判断公式，具有实际意义。     

她们的情 她们的诗

中国宋代婉约派著名女词人李清照与英国维多利亚时代浪漫主义女诗人伊丽莎白.巴雷特.勃朗宁（ELIZABETH BARRETTBROWNING）虽出生在不同的时代、国度,有着不同的背景,人生经历,但都通过诗歌表达了自己在不同的人生境故中对生活,感情的感受与理解。本文试图从她们不同的人生经历阶段所作诗歌为例探讨其诗歌表达的异同。     

Research on Insurance Pricing

1.INTRODUCTIONInsurancepricingisaneternalthemeinthestudyofinsurance.Whenwedesignainsuranceproduct,wemusttogiveapricefortheproductinordertoselltheproductininsurancemarkets.Whatiscalledinsurancepricingisactuallytomakeinsurancepremiumofinsuranceproduct.Reasonablepricingofinsuranceproductisofutmostimportancefortheexistenceanddevelopmentofinsurancecompany.Ifpremiumismadetoohigh-priced,althoughinsurancecompanycanobtainhighprofitofunderweightingadcanheightencapacityofinsurancecompanyinpaymentofd…     

生命科学文献检索方法

生命科学工作者需要花费大量的时间查阅文献 ,选择合适的检索工具和检索方式有事半功倍的效果 .本文介绍了有关生命科学的主要检索工具及检索方式 .指出光盘检索等以计算机为主体的检索方式将是获取信息的主要手段     

生命的颂歌

<生命的颂歌>是19世纪美国著名诗人朗费罗的名篇,以其音韵优美,抒情细腻,情绪明朗而广为传播.     

世纪末“新写实”的转变——论《贫嘴张大民的幸福生活》中的“崇高”意识

20世纪80年代中期出现的“新写实”小说解构了革命现实主义文学提倡的“崇高”,而刘恒创作于90年代末的“新写实”小说《贫嘴张大民的幸福生活》却一反这一路数,着力张扬了小市民与命运抗争的宝贵精神,使小说充满了崇高的意味。     

Ramet population ecology of Panicum virgatum in the field - Competitively random growth of ramets and foraging behavior of ramet populations

The authors investigated the heterogeneous size patterns and dynamic growth of the ramet population of Panicum virgatum, a clonal caespitose plant, limited to the space occupied by a ramet bunch and the time of the ramet yearly life cycle, to understand the ecology of clonal caespitose plants in the field, where the ramet bunch generally consisted of more than one genet. Dynamic life tables for ramet populations were established by the replacement of living ramets at the present time with "dead" ones in past time. These tables revealed stable coexisting patterns of isometric and allometric growing processes of ramets in mass and height respectively, which approximately followed the historic trajectory of a density-independent population. The ecology of clonal caespitose plants is further discussed based on the competitively random growth of ramet individuals, including the scale of foraging behavior. In the field, the ramet population ecol-ogy of switchgrass may be a statistical result of competitively random growth of ramet individuals. The foraging behavior of a ramet population could then be presented as a process in which ramet individuals competed with each other for light and grew randomly, whileat the same time a relatively stable dynamic growth pattern was apparent at the level of the ramet population, and the functional leaves were placed properly in time and space.     

穿越时空的生死恋歌--简论小说《我在天堂等你》

裘山山著《我在天堂等你》一书以五十年前一群进藏女兵所经历的悲欢离合、酸甜苦辣的生命历程，展示了她们对理想、事业的执著追求和饱经岁月沧桑的情感经历。文章以白雪梅的生命、情感历程剖析为主，分析了小说中新老三代西藏军人在理想、事业、爱情观念上的巨大差异，揭示老一辈西藏军人的美好心灵和丰富的内心世界。     

The range of life in amber: significance and implications in DNA studies

A survey of the major fossiliferous amber deposits is provided, including ages and various categories of life forms reported from each. The frequence of occurrence of the major groups of plants and animals in these amber deposits is also given. Thus far, DNA from four insect and one plant species has been extracted from amber fossils. In the case of the stingless bee in Dominican amber, evidence of reproducibility is provided, since two independent laboratories isolated DNA from six or more different specimens of the same insect.Amber sources for DNA studies are listed together with their advantages and disadvantages. The important points are the availability of desired pieces, the proper identification of the fossil, verification of the amber deposit, the cost involved, and the feasibility of causing damage to the specimen. The availability of several types of amber (Mexican, Dominican, Baltic, Chinese, Canadian, Siberian and Lebanese) at four major sources (academic collections, commercial dealers, private collections and amber mines) is discussed. The scientific implications of obtaining DNA from amber inclusions are presented.     

一类最优更新策略的研究

当系统元件受到很多独立因素影响时,本文以矿井提升系统中的铜丝绳为例,利用可靠性理论,给出它的可靠性评估及安全系数的计算,并利用更新极限定理,在其寿命为正态分布的情况下,通过一个近似方程,得到了最佳更换策略。为制订合理的维修更换制度提供了理论依据。