社员异质性与资金互助合作的稳定运行机制

从我国农村合作经济组织发展实际来看,社员异质性已成为其最重要的内部环境特征。通过分析异质性社员的构成成分,将其分为核心社员和普通社员两类,对比分析他们的行为差异,建立Bertrand博弈模型,探讨异质性社员参与资金互助业务的可能性条件。研究发现异质性社员之间的合作具有节约成本的效用,将合作成本分为组织成本和交易成本进行解读,且合作成本满足一定条件下,异质性社员具有合作的可能性,最后提出了这种合作稳定运行的机制。     

基于公理设计理论的仿真软件评价方法研究

针对仿真软件评价优选问题,提出一种基于公理设计理论的仿真软件评价方法。以公理设计理论为指导建立仿真软件评价模型,通过信息公理以信息量大小为测度来度量仿真软件产品的优劣。考虑到备选方案评价指标信息具有不完全性和模糊性特征,采用信息公理中的经典信息量计算方法存在局限性,对信息公理中的信息量计算方法进行拓展,提出基于单值点、区间数相离度、满意度和模糊信息的信息量计算方法。结合经典的和拓展的信息量计算方法,给出仿真软件评价流程。以某生产制造企业选择仿真软件产品为例,说明所提出方法的可行性和有效性,实验结果也揭示了在仿真软件商业领域竞争中软件质量起到至关重要的作用。     

成员异质性对农民合作社收益分配控制权归属的影响分析——基于京、冀、黑三省72家农民合作社的调查

基于京、冀、黑三省72家农民合作社的调查,考察了农民合作社的成员异质性及其对合作社收益分配控制权归属的影响。通过样本数据描述、因子分析和Logistic回归分析,结果表明:农民合作社的成员异质性并不是体现在成员农民身份的异质性上,而是休现在理事会成员与普通成员之间的文化程度差异、经营规模差异、社会活动能力差异、在合作社内的出资差异、在合作社内的角色差异等方面。理事会成员与普通成员之间异质性可以归纳为成员资源异质性和成员参与异质性两大类,其中,成员参与异质性会显著影响农民合作社的收益分配控制权归属,而成员资源异质性的影响并不显著。可见,通过提高普通成员参与程度,缩小成员参与异质性,可以在一定程度上达到规范合作社收益分配决策机制的效果。     

Analytic evaluation of the expectation and variance of different performance measures of a schedule on a single machine under processing time variability

In this paper, we present closed-form expressions, wherever possible, or devise algorithms otherwise, to determine the expectation and variance of a given schedule on a single machine. We consider a variety of completion time and due date-based objectives. The randomness in the scheduling process is due to variable processing times with known means and variances of jobs and, in some cases, a known underlying processing time distribution. The results that we present in this paper can enable evaluation of a schedule in terms of both the expectation and variance of a performance measure considered, and thereby, aid in obtaining a stable schedule. Additionally, the expressions and algorithms that are presented, can be incorporated in existing scheduling algorithms in order to determine expectation-variance efficient schedules.     

Bayesian Spatial Analysis for the Evaluation of Breast Cancer Detection Methods

This study investigated the impact of spatial location on the effectiveness of population‐based breast screening in reducing breast cancer mortality compared to other detection methods among Queensland women. The analysis was based on linked population‐based datasets from BreastScreen Queensland and the Queensland Cancer Registry for the period of 1997–2008 for women aged less than 90 years at diagnosis. A Bayesian hierarchical regression modelling approach was adopted and posterior estimation was performed using Markov Chain Monte Carlo techniques. This approach accommodated sparse data resulting from rare outcomes in small geographic areas, while allowing for spatial correlation and demographic influences to be included. A relative survival model was chosen to evaluate the relative excess risk for each breast cancer related factor. Several models were fitted to examine the influence of demographic information, cancer stage, geographic information and detection method on women's relative survival. Overall, the study demonstrated that including the detection method and geographic information when assessing the relative survival of breast cancer patients helped capture unexplained and spatial variability. The study also found evidence of better survival among women with breast cancer diagnosed in a screening program than those detected otherwise, as well as lower risk for those residing in a more urban or socio‐economically advantaged region, even after adjusting for tumour stage, environmental factors and demographics. However, no evidence of dependency between method of detection and geographic location was found. This project provides a sophisticated approach to examining the benefit of a screening program while considering the influence of geographic factors.     

Confidence Intervals for a New Characteristic of Central Tendency of Distributions

The t-mean is a new characteristic of the central tendency of continuous distributions. In this article, we introduce a t-difference in the sample space, which is used for a construction of confidence intervals for the t-mean.     

A two-stage design for multivariate estimation of proportions

ABSTRACT

In this article, the problem of estimation of the several proportions of two inter-dependent sensitive characteristics prevailing in a given population is considered. A new two-stage randomized response model has been proposed by extending Lee et al.’s (2013 Lee, C., Sedory, S., Singh, S (2013). Estimation at least seven measures of qualitative variables from a single sample using randomized response technique. Stat. Probab. Lett. 83(1):399–409.[Crossref], [Web of Science ®] , [Google Scholar]) model. The expressions for biases, variances, and mean square errors of different estimators have been provided. The relative efficiency comparisons of the proposed estimators has been made, numerically by considering the different practicable choices of the design parameters. It was observed that the proposed extended version performs efficiently than simple and crossed models of Lee et al. (2013 Lee, C., Sedory, S., Singh, S (2013). Estimation at least seven measures of qualitative variables from a single sample using randomized response technique. Stat. Probab. Lett. 83(1):399–409.[Crossref], [Web of Science ®] , [Google Scholar]).     

模糊型计划评审技术在海洋结构建造工期估算中的应用

根据模糊型计划评审技术的理论和方法,研究海洋工程结构建造周期的估算方法;应用模糊数学中隶属度的概念,将建造过程中各种因素（气候、人员心理、设备状况、经济制约）,用定量形式表示出来,提出了更为科学的海洋工程结构建造周期估算方法。该方法对于工程结构建造周期的估算是可行的。     

江泽民党性锻炼思想述论

在全面把握江泽民党性锻炼思想内涵的基础上,强调了增强共产党员党性锻炼的必要性和重要性,提出要通过有的放矢、学以致用和理论联系实际的方法来加强党员的党性锻炼,并通过社会实践来增强党员的党性锻炼,从而使广大党员永葆蓬勃朝气和浩然正气,在改革开放和现代化建设的事业上取得更大的成功。     

Stimulus equivalence, generalization, and contextual stimulus control in verbal classes

Stimulus generalization and contextual control affect the development of equivalence classes. Experiment 1 demonstrated primary stimulus generalization from the members of trained equivalence classes. Adults were taught to match six spoken Icelandic nouns and corresponding printed words and pictures to one another in computerized three-choice matching-to-sample tasks. Tests confirmed that six equivalence classes had formed. Without further training, plural forms of the stimuli were presented in tests for all matching performances. All participants demonstrated virtually errorless performances. In Experiment 2, classifications of the nouns used in Experiment 1 were brought under contextual control. Three nouns were feminine and three were masculine. The match-to-sample training taught participants to select a comparison of the same number as the sample (i.e., singular or plural) in the presence of contextual stimulus A regardless of noun gender. Concurrently, in the presence of contextual stimulus B, participants were taught to select a comparison of the same gender as the sample (i.e., feminine or masculine), regardless of number. Generalization was assessed using a card-sorting test. All participants eventually sorted the cards correctly into gender and number stimulus classes. When printed words used in training were replaced by their picture equivalents, participants demonstrated almost errorless performances.