中国C2C电子商务网站的用户体验

通过学生用户试用在两个不同文化背景下设计出来的C2C电子商务网站——淘宝网和Ebay易趣,并进行初次网上购物体验活动,以及对测试后满意度问卷的分析,结果显示:在用户决定购买的过程中,网站概念/功能的传递和表达对用户的影响最大,它们会影响到用户的初次购买决定;而流程的跳转以及交互行为的不平衡会对用户的购买过程造成影响;对用户初次购物总体评价影响最大的是功能满足。两个网站的系统可用性与界面设计不能决定用户的总体评价,但却会影响到用户对网站的感觉。因此,创建一个对用户有用、好用和想用的购物网站就必须要满足功能、交互以及冲击三个层次的要求。     

普通高校英语专业课考核方式改革研究

针对英语专业考核方式的现状,以提高学生应用能力为目标,探讨高年级英语专业课考核方式改革的必要性,对我校英语专业考核改革实践提出建议。     

成都理工大学2003、2004级大学生体质健康标准测试成绩对比

学生体质健康标准测试已经在全国大、中、小学全面展开。文章根据成都理工大学2003、2004级大学生体质健康标准测试数据,通过表格统计,对该校学生体质状况做出简要分析,并从事实依据出发,找出问题、提出建议,使学生能了解自身的健康状况,达到正确引导学生锻炼身体、增强体质水平的目的。     

大学英语口语考试浅谈

为了适应国家改革开放的需要,培养符合社会发展的人才,提升我校的英语教学水平,学校对英语考试进行了改革。通过调查问卷和面谈方式,探讨了学生对此项改革的态度,大学英语口语考试对英语学习有无反拨作用,考试设计是否合理以及学生英语口语面临的困难。     

现代人才测评技术及其应用

人才测评是现代人力资源管理的基础内容,其主要技术有:心理测验、面试和评价中心技术等。通过对人才测评技术的理论基础、特征及发展历程的概述,重点分析了人才测评技术在应用中的特点。     

Classical testing in functional linear models

We extend four tests common in classical regression – Wald, score, likelihood ratio and F tests – to functional linear regression, for testing the null hypothesis, that there is no association between a scalar response and a functional covariate. Using functional principal component analysis, we re-express the functional linear model as a standard linear model, where the effect of the functional covariate can be approximated by a finite linear combination of the functional principal component scores. In this setting, we consider application of the four traditional tests. The proposed testing procedures are investigated theoretically for densely observed functional covariates when the number of principal components diverges. Using the theoretical distribution of the tests under the alternative hypothesis, we develop a procedure for sample size calculation in the context of functional linear regression. The four tests are further compared numerically for both densely and sparsely observed noisy functional data in simulation experiments and using two real data applications.     

食品安全检测紧缺人才培养模式的实践与探索

以新时期高等教育理念为指导,围绕产、学、研、用四个环节,教学实践中探索出食品安全人才培养模式:紧密结合生产、生活实际,注重实践应用;建设完善食品安全相关特色课程体系,提高教学水平,培养实用人才;结合食品安全法从法律角度提升人才培养,使培养的人才同时具备科学性和法律的规范性;研究性教学、研究性实验,由培养实用人才迈向培养有研究能力、创新能力的人才。     

Gay and Bisexual Men’s Experiences Using Self-Testing Kits for HIV and Rectal and Urethral Bacterial Sexually Transmitted Infections: Lessons Learned from a Study With Home-Based Testing

Abstract

Objectives: This study investigated the experiences of gay, bisexual, and other men who have sex with men (GBM) conducting HIV and sexually transmitted infection (STI) self-testing procedures. Methods: We analyzed mixed-methods data from 11 GBM who self-tested HIV-positive and 1,070 HIV-negative GBM who completed the HIV self-testing and STI self-sampling procedures. Results: Nearly all (99%) reported ease in urine-based STI self-sampling and most (90%) found rectal swab self-collection easy. Most (94%) checked their rapid-HIV self-testing results during the correct window (20-40 minutes), and nearly all (99%) trusted their HIV results. Conclusions: Recommendations for future self-testing procedures are provided based on findings from free-response data.     

A statistical measure of internal consistency

A test for homogeneity of several populations against the simple tree alternative is proposed when the observations in various groups are subject to the same pattern of random right-censorship. The test is a generalization of the one proposed by Slivka (1970) which is useful when testing time is expensive so that an early termination of an experiment is desirable. The power of the test is examined in a simulation study.     

Specification and testing of multiplicative time-varying GARCH models with applications

In this article, we develop a specification technique for building multiplicative time-varying GARCH models of Amado and Teräsvirta (2008, 2013). The variance is decomposed into an unconditional and a conditional component such that the unconditional variance component is allowed to evolve smoothly over time. This nonstationary component is defined as a linear combination of logistic transition functions with time as the transition variable. The appropriate number of transition functions is determined by a sequence of specification tests. For that purpose, a coherent modelling strategy based on statistical inference is presented. It is heavily dependent on Lagrange multiplier type misspecification tests. The tests are easily implemented as they are entirely based on auxiliary regressions. Finite-sample properties of the strategy and tests are examined by simulation. The modelling strategy is illustrated in practice with two real examples: an empirical application to daily exchange rate returns and another one to daily coffee futures returns.