Smoothing Splines with Boundary Correction

Regular smoothing splines are known to have a type of boundary bias problem that can reduce their estimation efficiency. In this paper, a boundary corrected smoothing spline with general order is designed in a way that the risk will decay at an optimal rate. An O(n) algorithm is also developed to compute the resultant estimator efficiently.     

Clear Effects in the 2 n−p Combined Design

The technique of semifolding is used to develop the 2 ^n?p designs. Based on the initial analysis, some factors may be more important than others. In other words, the results from analyzing the original experiment may suggest a specific set of effects to be de-aliased. On the other hand, some previously acquired information might be available for specific factors. In these cases, one may desire to isolate the main effects of these factors and each of their two-factor interactions in the experiments. Four rules that are presented in this article can systematically isolate effects of potential interest, which should serve well for researchers in all disciplines. The combined design, by semifolding, provides estimates of the interactions that involve specific factors so that the alias chains of the two-factor interactions can be broken.     

A natural conjugate prior for the nonhomogeneous poisson process with an exponential intensity function

This article presents a natural conjugate prior for the nonhomogeneous Poisson process (NHPP) with an exponential intensity function, for modeling the failure rate of repairable systems. The behavior of the conjugate prior distribution with respect to its parameters is studied, and the use of this prior in Bayesian estimation is compared to two other estimation approaches (the use of independent prior distributions, and the bivariate normal distribution). The use of the conjugate prior proposed here facilitates Bayesian statistical analysis of aging. In particular, the proposed prior allows us to explicitly account for dependence between the initial failure rate and the aging rate. This is a significant improvement over the assumptions made in most prior work (either the assumption that the aging rate is known, or the assumption that the initial failure rate and the aging rate are independent). Monte Carlo simulation shows that Bayesian estimation using the proposed prior generally performs at least as well as Bayesian estimation using independent priors for the initial failure rate and the aging rate,except in the case where the prior distribution underestimates both the initial failure rate and the aging rate.     

Characterizations based on conditional expectations

For given real functionsg andh, first we give necessary and sufficient conditions such that there exists a random variableX satisfying thatE(g(X)|X≥y)=h(y)r _x (y),∀y ∈ C _x , whereC _x andT _X are the support and the failure rate function ofX, respectively. These extend the results of Ruiz and Navarro (1994) and Ghitany et al. (1995). Next we investigate necessary and sufficient conditions such thath(y)=E(g(X)|X≥y), for a given functionh. Support for this research was provided in part by the National Science Council of the Republic of China, Grant No. NSC 86-2115-M-110-014 and NSC 88-2118-M-110-001     

N市老年人家庭医生签约服务知晓与利用情况调查分析

采用自制问卷,对N市2017年4月新签约居民进行电话调查,以有效应答样本中9 362例老年人为研究对象,分析N市主城区与非主城区老年人对家庭医生签约服务的知晓与利用情况差异。结果显示,在控制其他人口学因素不变的情况下,非主城区老年人签约知晓率是主城区的1.467倍,服务内容了解率是主城区的1.717倍,人均服务利用项目比主城区多0.630项,差异均有统计学意义。主城区与非主城区老年人对家庭医生签约服务的知晓与利用情况存在差异,如何发挥好家庭医生服务的作用应在实践中进一步探索。     

对《印度之行》中回声的多角度探寻

本文以后殖民主义理论作为支撑,从不同的角度解读了《印度之行》中的回声之谜。由于山洞和回声的含义都过于含蓄,且福斯特竭力运用似乎真实的自然现象去容纳过多的含义,因此山洞和回声不仅使英国游览者而且也使读者感到混乱和神秘。本文旨在从多角度解读回声,以进一步启发读者思考。     

浅析“垮掉的一代”文学

"跨掉的一代"这场运动及其文学作家和作品对于国内部分青年读者来说可能还比较陌生.其原因是多方面的,但主要恐怕还是文学作品的中文译本太少.本文试图通过对这场运动及作家和作品产生的社会背景及其发展过程进行简单的介绍和分析,以便让国内青年读者对此有一个大致的了解.     

薏米中微量有机锗测定的研究

依据二甲氧基羟基苯芴酮与锗的显色原理,用分光光度法对薏米中微量锗进行测定.研究了于HAC-NaAC的缓冲体系,在溴化十六烷基三甲铵(CTMAB)存在下,二甲氧基羟基苯芴酮与Ge(Ⅳ)形成红色络合物,其络合物的最大吸收波长为529nm,Ge(Ⅳ)在0-1.0ug/mL范围内符合比尔定律.拟定方法具有较好的选择性,多数金属离子不干扰检测,用于薏米中微量有机锗的测定,该方法简单可靠,并获得满意的分析结果.     

我国经济增长与通货膨胀相关性的计量经济学研究

一直以来,通货膨胀与经济增长的关系在经济学中争议很大.当前,处于经济转型期的我国的通货膨胀压力依然存在,如何正确认识通货膨胀与经济增长的关系,就显得越发重要.本文在回顾通货膨胀与经济增长主要理论的基础上,用计量经济学的方法建立一个非线性回归模型,通过对模型的检验和实证分析,说明在我国的特定发展阶段,通货膨胀与经济增长存在较显著的相关性,并据此提出一些较为可行的建议或方法.