基于TAM和IDT的大学生手机报使用意向研究

基于TAM(技术接受模型)和IDT(创新扩散理论),提炼出影响大学生使用手机报业务的五大因素,即感知创新性、手机报设计、感知有用性、感知易用性和主观规范,构建手机报使用意向研究模型。通过面向江苏省不同地市上千名大学生展开问卷调查,利用IBM SPSS Statistics 20.0社会科学统计软件和AMOS 20.0结构方程模型进行统计、分析和验证,针对数据分析结果得出感知创新性是影响大学生手机报使用意向最为显著的因素,并根据各因素影响程度排序,提出了创新形式与内容、注重有用性、降低复杂性、实现可试性等手机报发展的具体对策和建议。     

Assurance test and its equivalent truncated sequential test

Abstract

In order to save more test cost, assurance test and its equivalent truncated sequential test are studied. In a commonly used case, the operating characteristic (OC) function and expected test time (ETT) function of an assurance test are derived in a concise way. Equivalent test and relative concepts are defined. The procedures to construct a near equivalent truncated sequential test of an assurance test are established. Computation studies show that the near equivalent truncated sequential tests proposed in this paper keep almost the same OC curves with the assurance tests respectively. However, they can save the ETTs dramatically. In fact, the results show that the near equivalent truncated sequential tests can save around 50% of ETTs than the assurance tests respectively.     

Acceptance Sampling Based on Truncated Life Tests in the Birnbaum Saunders Model

We develop acceptance sampling plans assuming that the life test is truncated at a preassigned time. The lifetimes of the test units are assumed to follow the Birnbaum Saunders distribution. The minimum sample size necessary to ensure the specified average life is obtained and the operating characteristic values of the sampling plans and producer's risk are presented. An illustrative example is given.     

A Design For Survival Studies: A Multi-regional Trial With Unrecognized Heterogeneity

A bridging study defined by ICH E5 is usually conducted in the new region after the test product has been approved for commercial marketing in the original region due to its proven efficacy and safety. However, extensive duplication of clinical evaluation in the new region not only requires valuable development resources but also delay availability of the test product to the needed patients in the new regions. To shorten the drug lag or the time lag for approval, simultaneous drug development, submission, and approval in the world may be desirable. Recently, multi-regional trials have attracted much attention from sponsors as well as regulatory authorities. Current methods for sample determination are based on the assumption that true treatment effect is uniform across regions. However, unrecognized heterogeneity among patients as ethnic or genetic factor will effect patients’ survival. Using the simple log-rank test for analysis of treatment effect on survival in studies under heterogeneity may be severely underpowered. In this article, we address the issue that the treatment effects are different among regions to design a multi-regional trial. The optimal log-rank test is employed to deal with the heterogeneous effect size among regions. The test statistic for the overall treatment effect is used to determine the total sample size for a multi-regional trial and the consistent trend and the proposed criteria are used to rationalize partition sample size to each region.     

Dorfman-sterrett screening (group testing) schemes and the effects of faulty inspection

The Dorfman screening procedure is based on first testing a group of items as a whole, proceeding to individual testing only if the group-test indicates existence of at least one nonconforming item. A modification suggested by Sterrett allows for reintroduct-ion of group testing of all items, not yet tested individually, when an item is classified as nonconforming by an individual test. Effects of faulty test inspection on the properties of the modified procedures are studied.     

Designing Variables Sampling Plans with Process Loss Consideration

For the implementation of an acceptance sampling plan, a problem the quality practitioners have to deal with is the determination of the critical acceptance values and inspection sample sizes that provide the desired levels of protection to both vendors and buyers. Traditionally, most acceptance sampling plans focus on the percentage of defective products instead of considering the process loss, which doesn't distinguish among the products that fall within the specification limits. However, the quality between products that fall within the specification limits may be very different. So how to design an acceptance sampling plan with process loss consideration is necessary. In this article, a variables sampling plan based on L _e is proposed to handle processes requiring low process loss. The required sample sizes n and the critical acceptance value c with various combination of acceptance quality level are tabulated. The proposed sampling plan provides a feasible policy, which can be applied to products requiring low process loss where classical sampling plans cannot be applied.     

由现象所引发的思考1--从接受角度看中外四部小说中的情爱问题

在文学创作及其接受中,凡涉及性爱描写的作品,就会引起强烈的争议。这涉及性爱描写的限度与我们接受的心理适应程度,以四部小说为例,性爱文学的限度和可能性是由于基于伦理道德的差异性而构建的艺术世界,因而充满争议。性爱文学及其表现与人类的胸襟紧密相连,人类有多大胸襟就会有多大的性爱艺术境界,也有多大容纳这类作品的心理精神空间。     

Popularity as an Affordance for Friendship: The Link Between Group and Dyadic Experience*

The associations between measures of popularity (acceptance, rejection and preference) and friendship were examined in three independent samples of elementary and middle school children. Data were obtained by means of sociometric nomination and rating scale procedures. Results reveal that, regardless of measurement technique, acceptance is generally more strongly related to friendship than is either rejection or preference. The size of the association between popularity and friendship decreases with age. Mean comparisons show that popularity is a predictor and/or is temporally antecedent to friendship rather than vice-versa. These results indicate that the association between popularity and friendship derives from their conceptual dependence on the construct of liking.     

Failure–censored reliability sampling plans for the exponential distribution

In this paper we examine the failure-censored sampling plans for the two–parameter exponential distri- bution based on m random samples, each of size n. The suggested procedure is based on exact results and only the first failure time of each sample is needed. The values of the acceptability constant are also tabulated for selected values of p _α ¹ p _β ¹, α and β. Further, a comparison of the proposed sampling plans with ordinary sampling plans using a sample of size mn is made. When compared to ordinary sampling plans, the proposed plan has an advantage in terms of shorter test-time and a saving of resources.