Optimal partially balanced nested row-column designs

A partially balanced nested row-column design, referred to as PBNRC, is defined as an arrangement of v treatments in b p × q blocks for which, with the convention that p q, the information matrix for the estimation of treatment parameters is equal to that of the column component design which is itself a partially balanced incomplete block design. In this paper, previously known optimal incomplete block designs, and row-column and nested row-column designs are utilized to develop some methods of constructing optimal PBNRC designs. In particular, it is shown that an optimal group divisible PBNRC design for v = mn kn treatments in p × q blocks can be constructed whenever a balanced incomplete block design for m treatments in blocks of size k each and a group divisible PBNRC design for kn treatments in p × q blocks exist. A simple sufficient condition is given under which a group divisible PBNRC is Ψ_f-better for all f> 0 than the corresponding balanced nested row-column designs having binary blocks. It is also shown that the construction techniques developed particularly for group divisible designs can be generalized to obtain PBNRC designs based on rectangular association schemes.     

Improved kth power expectile regression with nonignorable dropouts

The kth ( 1<k≤2) power expectile regression (ER) can balance robustness and effectiveness between the ordinary quantile regression and ER simultaneously. Motivated by a longitudinal ACTG 193A data with nonignorable dropouts, we propose a two-stage estimation procedure and statistical inference methods based on the kth power ER and empirical likelihood to accommodate both the within-subject correlations and nonignorable dropouts. Firstly, we construct the bias-corrected generalized estimating equations by combining the kth power ER and inverse probability weighting approaches. Subsequently, the generalized method of moments is utilized to estimate the parameters in the nonignorable dropout propensity based on sufficient instrumental estimating equations. Secondly, in order to incorporate the within-subject correlations under an informative working correlation structure, we borrow the idea of quadratic inference function to obtain the improved empirical likelihood procedures. The asymptotic properties of the corresponding estimators and their confidence regions are derived. The finite-sample performance of the proposed estimators is studied through simulation and an application to the ACTG 193A data is also presented.     

政府投资项目中的不完全信息静态博弈模型分析

针对投标企业采取不平衡报价的投标策略,从政府的角度出发,运用不完全信息静态博弈模型理论来探索政府的最优策略.研究结果表明,政府投资项目避免不平衡报价招标的最优策略应为最大限度地吸引合格投标人参与竞标,并建立一种使不平衡报价受损、平衡报价受益的正外部效应机制.     

测控技术与仪器专业课程体系研究

本文介绍了国内测控技术与仪器专业的特点及发展概况,对测控技术与仪器专业的专业课程设置、教学内容、教学手段与要求以及实践教学环节等方面进行了较深入的探讨,同时探索了如何将现代教育理念贯彻到专业课程教育体系中,使测控技术与仪器专业课程体系更加合理,满足培养21世纪创新型专业人才的需要。     

人工自然范畴和人工自然的结构特性

指出人工自然概念在技术哲学研究中具有基础性的地位,是技术哲学的逻辑起点.论述了人工自然与劳动的关系是密不可分的,劳动过程和技术过程只有在人工自然中才能进行,器具的"被使用"及其"指引"关系,组建着人工自然的结构,劳动选择着哪些自然物加到人工自然世界中;由于劳动具有"生产性"劳动剩余的增长,决定了人工自然的增殖性,人工自然、劳动和技术呈现为共同进化的特征.     

公正补偿原则的概念解析与立法建议

在限权条款中规定公正补偿原则是民主宪政国家的通例。但是何谓公正补偿,在理论和实践中存在不同的认识。文章将各国公正补偿原则的类型进行分类,并且对于其之所以被认为公正的理由进行探悉。在此基础上,揭示了公正补偿原则内涵和外延的时代性和社会功能,并提出完善我国补偿原则的立法建议。     

虚拟逻辑分析仪的开发

阐述了利用虚拟仪器概念研制的逻辑分析仪原理及其在设计中为提高采样速率,促进仪器小型化、增加电路可靠性、提供友善的用户界面等方面所做的具体工作和采取的具体措施。本文所述的虚拟仪器原理及其设计方法,在本世纪90年代的仪器开发中具有重要意义。     

正态分布尺度参数基于残缺观测数据的置信区间

对于残缺的样本观测数据，讨论了正态分布总体尺度参数的区间估计问题。给出了适用于残缺观测数据的构造置信区间的一种方法，即只需知道样本的任意两个关于样本中心对称顺序统计量的值，就可求出总体多数的置信区间。讨论了相应的分布密度函数，给出了大样本近似分布。     

对共同基金定理的重新认识——不完整市场研究

本文就不完整市场提出了对连续时间共同基金定理的重新认识。这一新认识的提出同样摆脱了以往研究中对投资者消费和最终财富效用函数的假设。同样的，这些效用函数也都是可时间累加的、非减的函数。这项理论延伸也是基于离散过程和线性代数的简单属性。本文的研究结果适用于不完整市场。另外，以往只适用于包含单一风险资产的完整市场的最优投资策略自动延伸至包含多个风险资产的不完整市场。文中举出了一个实例。     

Development of a Spiritual Support Scale for Use with Older Adults

SUMMARY

This study reports the development and empirical test of a measure of spiritual supports used by older adults in managing life challenge. The Spiritual Strategies Scale (SSS) consists of 18 items. Cronbach's coefficient alpha reliability for the measure was .86. The sample, gathered from interviews at four sites, consisted of 79 older adults who were predominantly Jewish European American and African American. Concurrent validity analyses suggest that this measure warrants further testing. This scale also has potential for clinical use in social work practice by counselors for older adults.