Corrected p-values for tests based on estimated nuisance parameters

In some situations the asymptotic distribution of a random function T _n() that depends on a nuisance parameter is tractable when has known value. In that case it can be used as a test statistic, if suitably constructed, for some hypothesis. However, in practice, often needs to be replaced by an estimator S _n. In this paper general results are given concerning the asymptotic distribution of T _n(S _n) that include special cases previously dealt with. In particular, some situations are covered where the usual likelihood theory is nonregular and extreme values are employed to construct estimators and test statistics.     

川东北山前高陡构造地应力精细计算方法

摘 要：川东北地质构造极其复杂，80% 以上都是山前高陡构造。复杂的构造条件给油气资源的勘探开发带来了极大的挑战，特别是对该区地应力大小、方向及展布规律的认识不清，给油气建井带来了很大困难。充分利用测井资料的连续性、经济性和高分辨率等优势，综合运用数理统计方法以及计算机综合成图技术，对该区的岩石力学参数和地应力进行了精细计算与研究，重点建立起适合川东北高陡构造的垂向应力离散分析模型以及水平应力精细求解公式。同时，提出了平均水平应力的概念和取值范围，并针对研究工区实际地质情况进行了深入计算和检验。所取得的成果大幅度提高了对川东北山前高陡构造地应力的计算精度和展布规律的认识     

A forecasting and policy simulation oriented small macro-model for the Indian economy

The design of macro-models for the purposes of derivation of macroeconomic stabilization policies and obtaining forecasts is an important area of theoretical and empirical economic research. This is because such a stance presents an ideal blend of skillfully interweaving the essential theoretical ingredients of the contemporary macroeconomic paradigms with specific structural features of the country under reference. The use of macro-models enables the policy makers to build alternative policy evidences and thus this approach proves to be far superior to the alternative approaches based on intuitive or judgmental criteria. It is against this background that a macro-model for the Indian economy is estimated in an error-correction framework. Based on it, some policy options are evaluated. ECM and time varying parameter based forecasts are obtained for inflation and growth for the Indian economy for the year 2004–2005.     

项目特征函数的导出及其特征研究

通过一个维度一个雏度地刻划,然后将刻划结果联合起来的方式,推导出了项目反应特征函数,并用数学分析的方法,探讨了项目反应理论框架中的项目难度参数和区分度参数的本质及其与经典真分数理论中的项目难度参数和区分度参数的异同,并指出了项目反应理论在应用中的一些误解和误用.     

信贷风险管理的区间数参数模型及其应用

针对商业银行的风险与收益的不确定性,建立了基于区间数的参数规划模型。银行通过选择风险损失参数α,应用该模型即可确定出在风险/收益均衡状态下,不同风险信贷项目的最优组合投放权重,获得既定风险下的最大收益。最后,给出的算例表明了该方法对商业银行的信贷风险管理具有较强的应用价值。     

具有时滞的非线性系统的k-全局稳定性

研究了具有时滞的非线性系统的稳定性问题，利用不等式分析技巧和常数变易法，给出了具有时滞的非线性系统的ｋ－全局指数稳定性的充分条件。并举例说明了所得结论的优越性     

Sequential estimation in two-truncation parameter family of distributions under type II censoring

Summary This paper deals with the sequential estimation ofq(ϑ₁, ϑ₂) when the underlying density function is of the formf(x)=q(ϑ₁, ϑ₂)h(x), where ϑ₁ and ϑ₂ are unknown truncation parameters. We study the sequential properties of the stopping rule and the sequential estimator ofq(ϑ₁, ϑ₂). In this study we assume that the sample is type II censored.     

LiBPh_4·4H_2O的脱水及氧化分解过程的热分析

通过热分析法,对四苯硼锂的脱水及氧化分解过程进行了研究,给出了脱水、氧化分解的温度和动力学参数、用离子模型对碱金属四苯硼盐的热稳定性进行了讨论.     

北美车前种群密度对形态参数的影响

本文研究了北美车前(Plantago virginica L.)种群的密度制约规律。统计表明:在生长季内,北美车前的繁殖投资与密度密切相关。在营养生长期间,种群密度对形态参数的影响不大,在生殖生长期间,叶数、个体鲜重、花数、花序重等形态参数受到种群密度明显的制约。     

Small area estimates for cross-classifications

Summary.  We develop a class of log-linear structural models that is suited to estimation of small area cross-classified counts based on survey data. This allows us to account for various associ- ation structures within the data and includes as a special case the restricted log-linear model underlying structure preserving estimation. The effect of survey design can be incorporated into estimation through the specification of an unbiased direct estimator and its associated covariance structure. We illustrate our approach by applying it to estimation of small area labour force characteristics in Norway.