造成运动损伤的心理和社会因素分析

对运动队的运动损伤因素进行调查,发现运动员的应激反应、个性特点、运动损伤史、心理活动、环境等心理和社会等因素也是引起损伤的重要因素,提示在运动训练中应注重运动员对这些因素的反应以及开展对这些因素影响的适应和调控训练.     

当今世界男子100m再创新纪录的突破口

用灰色数学法分析了第3、第6届世界田径锦标赛100m跑的技术参数，显示起跑反应和0～20m段的加速训练、最大速度能力和高速度保持能力的训练是再创纪录的突破口。     

Identifying families with complex needs after an initial child abuse investigation: A comparison of demographics and needs related to domestic violence,mental health,and substance use

Families with complex needs related to domestic violence, mental health, and substance use have some of the worst child protective services (CPS) outcomes. Although many of these families are identified during a CPS investigation and subsequently referred to home-based postinvestigation services (HBPS), many are re-reported to CPS, so it is important to understand the postinvestigation experiences of this vulnerable group. Therefore, this study compared families with and without complex needs to understand their uniquedemographics, needs, and postinvestigation outcomes.The sample consisted of 2008 caregivers who received HBPS following an initial CPS investigation. The Family Assessment Form (FAF) was used to measure family functioning in eight domains using a 1–5 scale with higher ratings representing worse functioning. Complex needs were indicated by a mean FAF score of 3 or higher for either domestic violence, mental health, or substance use. Using Pearson chi-square analyses and two-sample t-tests, comparisons were made between families with (n = 836) and without (n = 1172) complex needs. Half of caregivers with complex needs had a history of abuse, 25% had three to five needs, and nearly half had six to eight needs; 90% of caregivers without complex needs had zero to two needs. Furthermore, caregivers with complex needs had higher mean scores for concrete, educational, and clinical needs. These findings highlight the importance of recognizing variation among families referred to HBPS and accurate screening to ensure that families with complex needs are offered and receive services matched to their unique characteristics and needs.     

Assessing the Sensitivity of Weighted Least Squares Model Fit Indexes to Local Dependence in Item Response Theory Models

Given the relationships of item response theory (IRT) models to confirmatory factor analysis (CFA) models, IRT model misspecifications might be detectable through model fit indexes commonly used in categorical CFA. The purpose of this study is to investigate the sensitivity of weighted least squares with adjusted means and variance (WLSMV)-based root mean square error of approximation, comparative fit index, and Tucker–Lewis Index model fit indexes to IRT models that are misspecified due to local dependence (LD). It was found that WLSMV-based fit indexes have some functional relationships to parameter estimate bias in 2-parameter logistic models caused by violations of LD. Continued exploration into these functional relationships and development of LD-detection methods based on such relationships could hold much promise for providing IRT practitioners with global information on violations of local independence.     

第五方物流理论在应急响应时效优化中的应用

根据第五方物流系统优化理论,对第五方物流系统进行优化,构建第五方物流模型,包括第五方物流体系功能结构模型和第五方物流信息系统结构模型,从而建立应急物流保障体系,并对应急响应时效优化项目进行实证分析,对创新协同服务应急物流组织模式、运营模式、保障模式、服务模式的可能性进行具体的研究。实证分析结果表明 ,可以实现应急物流保障体系系统优化的目标,为客户提供供应链系统集成、流程优化和资源协同服务。     

Model order reduction using response-matching technique

A method for model order reduction is proposed using response-matching technique. The step and impulse inputs have been considered. All types of pole configurations in the original high-order and reduced low-order system are included in this paper like real, complex and repeated. The proposed method is comparable in quality with similar existing methods and is capable of generating a reduced-order model with a desired pole pattern.     

气候变化问题与我国的应对战略

全球气候变化是全球变化的核心问题,已经成为国际环境外交和国家可持续发展中的重大问题之一。我国政府对气候变化及其影响的重视与日俱增,已经确定了解决气候变化问题的基本原则,并初步确立了响应气候变化问题的立场和战略构想。本文从气候变化问题的由来、观测与研究的现状和问题、我国当前的政策和措施等方面,进一步思考应对气候变化影响和国际谈判的战略部署问题,并提出初步对策建议。     

计算机应急响应系统体系研究

应急响应是维护计算机和网络系统动态安全性的关键问题 .提出了基于层次化模型的计算机应急响应系统体系结构 ,从安全服务层、系统模块层、安全研究层的角度对系统的功能需求、模块划分和相应的技术支持给出了明确的定义 ,针对计算机应急响应系统所关注的事件响应、安全监控、入侵追踪、灾难恢复等问题 ,结合向用户提供的安全咨询、安全公告、安全状况分析等服务功能 ,进行了详细的阐述 .     

长白山地区蒙古栎光合特性

基于单叶尺度上的光强－光合响应以及CO2－光合响应测定，对长白山地区蒙古栎成树和幼树的光合特性分别进行了研究．结果表明，蒙古栎成树的光补偿点（Lcp）为21μmol/m2/s，光饱和点（Lsp）为1564μmol/m2/s，表观量子效率（a）为0.045μmol/mol；幼树的Lcp、Lsp、a以及CO2补偿点、饱和点分别为29μmol/m2/s、1581μmol/m2/s、0.049μmol/mol、73μmol/mol、625μmol/mol．幼树和成树具有相似的光响应特征，但前者的光合同化能力要高于后者．蒙古栎具有典型的喜光性，但对高光的利用效率要低于弱光．     

A multicultural study of biometric privacy concerns in a fire ground accountability crisis response system

Biometric technology is rapidly gaining popularity as an access control mechanism in the workplace. In some instances, systems relying on biometric technology for access control have not been well received by employees. One potential reason for resistance may be perceived privacy issues associated with organizational collection and use of biometric data. This research draws on previous organizational information handling and procedural fairness literature to frame and examine these underlying privacy issues. Perceived accountability, perceived vulnerability, and distrust were distilled from the previous literature as the primary dimensions of employee privacy concerns related to biometric technology. This study assesses the effects of these privacy concerns, how they vary based on the cultural influences of Anglos and Hispanics.Fire ground accountability is a critical management objective in the firefighting domain. In multi-unit or multi-agency crisis response scenarios, the on-scene incident commander tracks and accounts for each first responder. This research designed and deployed a new fire ground accountability system that tracked firefighters through finger pattern-based biometric logins to their assigned positions on the firefighting apparatus. An instrument measuring level of privacy concern on three underlying dimensions and demographic data was developed, validated and administered in a quasi-experimental field study. A pre-test–post-test survey methodology was employed to detect potential differences in privacy concerns as familiarity with the system increased. The study shows that Anglo and Hispanic subjects frame privacy issues differently associated with use of biometric technology in a fire ground accountability system. Finally, the study showed that some privacy concerns such as distrust and perceived vulnerability can be alleviated through system use with changes in post-use privacy concerns moderated by ethnic affiliation.