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The process of random load action was described with the Poisson stochastic process and the time-dependent reliability models of series system, parallel system and k/n system were developed with the probability differential equation and total probability formula when strength degenerated as time.

采用泊松随机过程来描述载荷的作用过程，运用概率微分方程和全概率公式建立了强度随时间退化时的串联系统、并联系统以及k/n系统动态可靠性模型。

The process of random load action was described with the Poisson stochastic process and the time de pendent reliability models of series system, parallel system and k/n system were developed with the probability differential equation and total probability formula when strength degenerated as time, Taking the degeneration of strength following the exponential rule as an example, the relationships between the reliability and failure rate of system and time were studied.

采用泊松随机过程来描述载荷的作用过程，运用概率微分方程和全概率公式建立了强度随时间退化时的串联系统、并联系统以及k/n系统动态可靠性模型。以强度退化服从指数退化规律为例，研究了串联系统、并联系统以及k/n系统的可靠度和失效率随时间的变化规律。

Under uncertainty which the enterprise asset value follows an exogenous stochastic differential equation, total value of the enterprise equals to asset value added to present value of tax sheltering about coupons, minus present value of bankruptcy costs.

在企业资产价值由一个随机微分方程来描述的不确定环境下，企业总价值等于企业资产价值加上债务息票支付的免税现值减去破产成本的现值，而息票支付的免税现值与破产成本的现值均为企业资产价值的未定相机权益，并依赖企业内生破产时资产价值。

Total Factor Productivity ; Regional Difference ; Stochastic Frontier Analysis ; Transcendental Logarithmic Production Function ; Data Envelopment Analysis ; Malmquist Prodctivity Index

国家社科基金；全要素生产率；区域差异；随机前沿分析；超越对数生产函数模型；数据包络分析； Malmquist生产率指数

This paper puts forward a long memory stochastic conditional durations model for ultra-high frequency durations series,and provides a kind of spectrum likelihood estimation method.

文章针对股票市场的超高频持续期序列，提出了长记忆随机条件持续期模型，并给出了模型参数的极大谱似然函数估计方法。

Stochastic process ; Regionalized variable ; Variogram ; Optimum unbiased estimate

随机过程；区域化变量；变异函数；最优无偏估值

The local averaging method is used to discretize the random field, correlated random variables are transformed to a set of uncorrelated normalized random variables, combining viscoelastic stochastic finite element method with H-L algorithm, the reliability of solid propellant grain is studied with different random parameters.

为了讨论各类随机因素对药柱结构可靠性的影响，采用局部平均法离散参数随机场，并通过相关结构分解成归一化的独立随机变量，将可靠度指标算法和粘弹性随机有限元法相结合，进行了固体推进剂药柱的结构可靠性分析。

Research work in this paper was supported by National Natural Science Foundation of China Undergarment No. 69133020 3 According to viewpoint of measurement statistic and stochastic process method, A new concept called statistic track width is introduced.

按测量统计性观点和随机过程的方法，提出了统计道宽的新概念，给出了确定性道宽和统计宽度关系的数学表达式。

The flexible manufacturing systems considered in the paper consist of possible unreliable workstations, whose inputs may be random. We derive the optimal input and service feedback control policy by using the uniformization technique and stochastic dynamic programming. It is shown that the optimal policy is of bang-bang type. Numeric example is given to illustrate the results.

对于具有随机输入和随机需求的一类不可靠柔性制造系统，利用转移率一致化技术和随机动态规划方法，给出了输入率和服务率分配的最优反馈控制策略，指出系统的最优控制具有bang-bang形式的开关结构，数值例子验证了文中的结果。

A real-coded genetic algorithm is adopted using the unimodal normal distribution crossover and the elitist model. And then, the stochastic search algorithm is used to optimize the elitist.

本文选择UNDX交叉算子作为遗传算法的主要算子，在保留当前最佳个体的同时，再对该最佳个体用随机搜索法搜索优化个体。

Objective:To explore the feasibility of laparoscopy in diagnosing and treating of abdominal diseases.

目的：探讨腹腔镜用以诊断腹部外科疾病及选择治疗方案的可行性。

The lifetime of nylon 1010 and nylon 1010/POSS composites decreased with increasing temperature.

热重-红外联用分析表明尼龙1010在氮气气氛下的降解产物主要为小分子的低聚物，POSS并不改变尼龙1010降解产物的组成。