不确定风险模型的不确定生存率

基于不确定理论的极值定理中最大值的不确定分布，以及风险模型中最大损失的定义及其独立增量性质,定义并证明了不确定风险模型的不确定生存函数,并给出2个基本性质.利用不确定生存函数和不确定更新过程的分布函数的定义,证明了保费和索赔均带折现率的不确定离散风险模型的不确定生存函数.     

Gui-Pi-Wan extract acts as a radioprotective agent

The radioprotective effects of 6 Gui-Pi-Wan extracts were investigated by examining cell viability and 30-d survival of mice after total-body ⁶⁰Co irradiation. Pretreatment with Gui-Pi-Wan precipitate by water extraction and alcohol precipitation (PWA) prior to irradiation resulted in significantly higher cell survival and lower apoptosis rates at 24 h after 5 Gy radiation, and increased 30-d survival in mice after exposure to a potentially lethal dose of 8 Gy. These results collectively indicate that PWA of Gui-Pi-Wan extracts is an effective radioprotective agent.     

大学图书馆对学生心理素质教育的价值研究

介绍了大学图书馆在大学生心理素质教育中的角色定位,针对当今大学生这个特殊群体的＂生存压力＂,从大学图书馆与大学生心理素质教育关系的角度,探讨了大学图书馆参与大学生心理素质教育的优势,提出了大学图书馆参与大学生心理素质教育的方法。     

无法逃脱的生存困境——论刘恒小说中的宿命意识

刘恒的小说有一种深深的宿命意识,他将人类的生存状态概括为无法逃脱的生存困境,人为了生存不断的挣扎,却无法逃脱悲剧命运。欲望中的挣扎、孤独的存在和宿命的死亡是刘恒小说中反复出现的命题。刘恒的宿命意识隐含了80年代末期现代性焦虑的时代特征,也是其小说创作中个性化理性自觉的表征。     

A stochastic proportional hazard model for the force of mortality

In order to avoid ‘frailty’ in deterministic assumptions concerning survival law, in this paper stochastic volatility in the force of mortality is considered. In particular, mortality rates are studied by means of a stochastic model of CIR type. A method for estimating its parameters is presented and an example of application, based on simulations of the process, is shown. Empirical results and comparison with a traditional model illustrate predictive performance and the flexibility of the model. Copyright © 2006 John Wiley & Sons, Ltd.     

试论新世纪晚报的突围策略

21世纪的报业市场竞争风起云涌,晚报在都市报纸、网络、电视的挤压下,大有被边缘化的趋势。但是,这并不意味着晚报将无所作为。从自身特点出发,晚报可以在发挥时间差优势、做足主流新闻、做好信息管家、加强公关策划等方面加大力度,从而谋求突围。     

诗意的生存——侗族审美生存特征初探

运用生态美学的理论为指导 ,对侗族审美生存特征进行探讨。侗族审美生存的特征是 :以歌唱为乐生手段 ,以和谐共生为审美理想 ,以滑稽幽默为审美情趣     

基于VXI的宽带网络测试仪

介绍了一种基于VXI总线的155M/622M ATM/POS宽带测试系统。该设备主要由接口单板和一块信元(包)产生/分析单板组成,配合相应的单板软件和终端软件,分别实现155M/622M线速下ATM/POS宽带设备的物理层告警和OAM测试以及ATM层/LINK层测试功能。该设备基于VXI总线开发,采用了高速电路设计、大规模可编程逻辑器件、嵌入式实时操作系统等技术,是国内首例基于VXI总线的622M ATM/POS测试仪。     

Photoreactivation of UV damage in culturedDrosophila cells

Summary Cell survival and photoreactivation of 254 nm ultraviolet (UV) light damage in a wild typeDrosophila cell line was assayed by colony formation in liquid medium. F_o, F_q, and extrapolation number for the exponential portion of survival curves are 21 J/m², 3.6 J/m², and 1.5 for non-photoreactivated cells and 110 J/m², 11.2 J/m², and 1.3 for those exposed to photoreactivating light. Maximal photoreactivation occurs at the 100 J/m² region of the curve. At 10 and 50% survival, 75–80% of the UV damage was photoreactivable.     

保险精算中双损失环境的"独立性"问题

保险精算中,双损失环境理论对于寿险风险分析和风险控制具有极其重要的意义,而且也是进行寿险产品设计的基础.本文在双损失环境理论的基础上,用概率论的方法,尝试对,P(τ)x等于tP'x(d)与tP'x(w)的乘积成立的独立性条件给出新的解释,并对一些学者的"独立性是矩估计成立的充分条件"等观点提出了不同的看法,并证明了基本矩关系不依赖于独立性的假设而恒成立.