中国居民社会认知与自感健康关系研究——体育参与的中介效应

基于中国综合社会调查（CGSS）2013年数据,利用结构方程模型检验居民社会认知的社会态度、阶层认同、公共服务满意程度三个方面对其自感健康的影响。研究结果表明：居民的自感健康水平受其社会态度、阶层认同、公共服务满意程度及体育参与程度的影响,并与其所居住的地区类型息息相关。中心城区居民的社会态度、阶层认同对其自感健康的影响低于农村,公共服务满意度、体育参与程度对其自感健康的影响高于农村。居民体育参与正向影响自感健康的同时,还在农村居民"社会态度→自感健康"路径、中心城区和农村居民"阶层认同→自感健康"路径、中心城区和农村居民"公共服务→自感健康"路径中均起到中介效应。     

武当山世界文化遗产地居民旅游影响感知态度模型

武当山世界文化遗产地居民的态度决定了当地旅游业能否可持续发展。基于社会交换理论和既有研究成果,运用结构方程模型构建的武当山世界文化遗产地居民旅游影响感知态度模型指出,居民的旅游经济、社会文化影响感知是其态度的重要影响因素,环境影响感知的作用则较为微弱。研究结果的启示主要有三点：武当山旅游业可持续发展不能忽视当地居民的经济利益诉求;减弱旅游业发展对当地社会文化带来的不利影响;加大遗产地社区环境整治力度。     

基于SEM的新型职业农民信息服务使用意愿影响因素研究

为进一步了解新型职业农民使用信息服务的意愿及其影响因素,为提高后续提供知识服务的科学性、针对性和有效性提供参考依据,更好地满足他们的信息需求。基于技术接受模型和期望确认理论,构建新型职业农民信息服务使用意愿影响因素模型,采用问卷调查方法收集数据,利用Smart PLS 3.0工具检验提出的假设。研究结果表明,信息质量、感知有用性和期望确认度对新型职业农民使用意愿具有显著的正向影响,感知成本和感知风险对其使用意愿具有显著的负向影响,进一步分析模型分成因,并为后续针对新型职业农民的信息服务提出几点建议。     

大学生妒忌心情境问卷编制研究

文章从“情境”、“关系”的角度探析影响妒忌心产生的因素,并编制适合测量大学生妒忌心理的问卷。通过自由填写并结合前人的研究,围绕财富、能力、人气、魅力和恋人五个情境构建问卷并实施调查。结果显示,40个项目均具有良好的区分度（P〈O．05）,六个情境均具有良好的信度和效度（P〈0．01）,验证性因子分析模型与调查数据拟合较好。该问卷可用于大学生妒忌心方面的研究。     

Using SEM to Analyze Complex Survey Data: A Comparison between Design-Based Single-Level and Model-Based Multilevel Approaches

Both ad-hoc robust sandwich standard error estimators (design-based approach) and multilevel analysis (model-based approach) are commonly used for analyzing complex survey data with nonindependent observations. Although these 2 approaches perform equally well on analyzing complex survey data with equal between- and within-level model structures (B. O. Muthén & Satorra, 1995), the performances of these 2 approaches for analyzing multilevel data with unequal between- and within-level structures have not yet been systematically examined. In this study, we extended B. O. Muthén and Satorra's (1995) Muthén, B. O. and Satorra, A. 1995. Complex sample data in structural equation modeling. Sociological Methodology, 25: 267–316. [Crossref], [Web of Science ®] , [Google Scholar] study by comparing these 2 approaches and an additional model-based maximum model for analyzing multilevel data considering number of clusters, cluster size, intraclass correlation, and the equality of different level structures. The simulation results showed the model-based maximum model generally performed well across conditions. This model is also recommended as an alternative for analyzing nonindependent survey data, especially when the information of the higher level model structure is not known.     

On the Performance of Likelihood-Based Difference Tests in Nonlinear Structural Equation Models

This article investigates likelihood-based difference statistics for testing nonlinear effects in structural equation modeling using the latent moderated structural equations (LMS) approach. In addition to the standard difference statistic T_D, 2 robust statistics have been developed in the literature to ensure valid results under the conditions of nonnormality or small sample sizes: the robust T_DR and the “strictly positive” T_DRP. These robust statistics have not been examined in combination with LMS yet. In 2 Monte Carlo studies we investigate the performance of these methods for testing quadratic or interaction effects subject to different sources of nonnormality, nonnormality due to the nonlinear terms, and nonnormality due to the distribution of the predictor variables. The results indicate that T_D is preferable to both T_DR and T_DRP. Under the condition of strong nonlinear effects and nonnormal predictors, T_DR often produced negative differences and T_DRP showed no desirable power.     

欠发达地区国际科技合作的环境依赖分析——来自重庆的证据

欠发达地区不良的国际科技合作环境不仅能够直接影响国际科技合作的可能性,而且其负面效应还可以通过国际关系决策的相互依赖性而放大,从而严重影响了科技进步及生产力的发展。本文从经济环境、文化环境、政策环境和法律环境四个维度着手,并使用SEM-PCA方法首次将欠发达地区国际科技合作环境因素引入实证研究领域。实证研究结果表明:(1)对于欠发达地区来说,文化环境对其开展国际科技合作可能性影响的作用最大,在文化环境中,人员素质及文化的融合已经成为欠发达地区与其他国家或地区竞争国际科技合作伙伴的优势;(2)欠发达地区国际科技合作的可能性并不依赖于当地的经济环境;(3)吸引其他具有技术优势的国家或地区与欠发达地区进行国际科技合作的一个重要原因在于欠发达地区有着稳定而又优惠的政策;(4)与欠发达地区进行国际科技合作的伙伴看重的是在欠发达地区能够进行法律风险规避和节约交易成本的优势。     

Perception-based model for analyzing the impact of enterprise blockchain adoption on SCM in the Indian service industry

Permissioned blockchain utilized by any organization is commonly known as Enterprise Blockchain (EBC). EBC represents a popular investment option as enterprise system in the service industry. This paper aims at analyzing the perception of EBC among practitioners in service industry. As significant hype prevails about EBC usefulness in service industry, we examine if the perception of the usefulness of EBC among practitioners is borne out of knowledge of theoretical benefits of EBC, or is it borne out of the hype. A scale for measuring EBC benefits is developed. In order to test the hypothesized relationships, structural equation modelling (SEM) is used. We extend the concept of perceived usefulness from technology acceptance model for service supply chain management (SCM) and measure the perceived usefulness of EBC for six supply chain dimensions in the service industry. We examine if the service industry managers perceive EBC to be profitable based on the practical usefulness of EBC in various dimensions of service SCM. Moderating effects of 5 factors are analysed on relationships of our research model. This paper provides insights about the dimensions of service SCM, in which service industry practitioners perceive EBC to be useful and may contribute to increment in organization’s profitability.     

电子显微技术的现状与发展

从已普及使用的扫描电子显微镜(SEM)的应用现状出发,阐述了最近发展的电子显微技术如环境扫描电子显微镜(ESEM)、扫描隧道显微镜(STM)、原子力显微镜(AFM)等新的电子显微技术的结构原理及应用特点。