中学生体重超重与肥胖的原因及其干预因素分析

通过问卷调查等方法对超重或肥胖的学生进行调查,结果表明：超重或肥胖的学生喜欢吃油炸类和甜食的占79．85％,而以甜品饮料为零食的占61．54％,在日常习惯中吃一些高热量、低营养的快餐食品,使热量和糖的摄入大大提高,是造成超重或肥胖的主要因素;大约有一半的超重和肥胖初中生不愿意参与体育活动。运动因素、饮食习惯、对形体美的正确认知和社区环境改善是干预超重或肥胖的主要手段。     

企业技术开发的风险原理与防范研究

对企业技术开发风险原理进行了理论探讨,设计出风险因素体系,通过专家咨询分析其影响程度,指出企业应重点防范的风险因素,建立由企业、社会和政府组成的技术研究开发风险的三维防范体系。     

制约与提升:教师职业声望的社会学分析

影响教师职业声望的主要因素是化传统、社会需求、职业的不可替代性、职业群体的道德素质等，而不是教师的经济收入。提高教师职业声望策略应重在教师职业队伍内部建设而非外部的政策性调节，应从实现教师职能现代化，形成教师行业性自律和提高教师自身职业满意度等方面着手提高教师的职业声望。     

我国区域经济可持续发展效率影响因素实证分析——基于面板数据分位数回归模型

运用我国28个省（市）的面板数据,利用分位数回归模型实证分析了我国区域经济可持续发展效率的影响因素。研究结果表明：经济规模、对外开放程度、地方财政支出比重和自主创新能力对经济可持续发展效率均呈现显著正向促进作用;工业比重上升和人口密度的增加对经济可持续发展效率的改善有负面影响;另外,各影响因素在不同分位点对我国区域经济可持续发展效率的影响程度差别较大。最后,文章对如何提高我国区域经济可持续发展的效率,提出了相应的政策建议。     

妊娠期糖尿病相关炎性因子的研究进展

目前妊娠期糖尿病的发病机制尚不完全清楚,随着研究的进展,免疫炎症假说日益受到学者的重视.妊娠期糖尿病的发病与病人体内的促炎/抗炎细胞因子平衡失常有关,该平衡倾向于促炎细胞因子的分泌,而抗炎细胞因子在疾病的发生、发展中可能发挥保护作用,文章综述了促炎细胞因子(TNF-6、IL-6、IFN-γ、IL-2、IL-17、IL-1β)和抗炎细胞因子(IL-10、IL-37、IL-4)在妊娠期糖尿病发生、发展中的作用,以及它们在临床筛查和诊断中的应用,以期为妊娠期糖尿病的预测和防治提供参考.     

Evaluating the Comparability of Paper‐ and Computer‐Based Science Tests Across Sex and SES Subgroups

As access and reliance on technology continue to increase, so does the use of computerized testing for admissions, licensure/certification, and accountability exams. Nonetheless, full computer‐based test (CBT) implementation can be difficult due to limited resources. As a result, some testing programs offer both CBT and paper‐based test (PBT) administration formats. In such situations, evidence that scores obtained from different formats are comparable must be gathered. In this study, we illustrate how contemporary statistical methods can be used to provide evidence regarding the comparability of CBT and PBT scores at the total test score and item levels. Specifically, we looked at the invariance of test structure and item functioning across test administration mode across subgroups of students defined by SES and sex. Multiple replications of both confirmatory factor analysis and Rasch differential item functioning analyses were used to assess invariance at the factorial and item levels. Results revealed a unidimensional construct with moderate statistical support for strong factorial‐level invariance across SES subgroups, and moderate support of invariance across sex. Issues involved in applying these analyses to future evaluations of the comparability of scores from different versions of a test are discussed.     

Photo-elicitation: reflexivity on method,analysis, and graphic portraits

In this methodological discussion, the authors detail and reflect on the processes of using photo-elicitation interviewing as a way to align with positive qualitative methodologies, to gain access to participant beliefs and values, and to highlight participant voices through their choices of words and visuals. A review of the literature and an overview of the educational research experiences leading to the discussion are included. Next, the discoveries regarding what is methodologically new and/or valuable concerning this visual method is presented. In the final section, the authors reflexively contemplate aspects of visual methodological processes in an effort to address methodological crossroads of potential and tension including: (1) the potential of decontextualized photos, (2) photos as metaphors of meaning, (3) photos as representations of inherent meaning, (4) participant empowerment, and (5) graphic representation or graphic portraits.     

不分明化拓扑中的半开集和半连续函数

给出了不分明化拓扑空间中半开集和半连续函数的概念,并讨论了它们的某些性质。     

基于因子分析的度假型饭店顾客感知价值评价体系研究--以杭州第一世界大酒店为例

随着度假旅游的蓬勃开展,度假型饭店顾客感知价值研究成为重要课题。文章以感知价值理论为基础,结合度假型饭店产品内涵及经营特色,采用因子分析法构建度假型饭店顾客感知价值评价模型,并以杭州第一世界大酒店为例进行实证研究。结果表明：饭店虽然在环境塑造、区位资源、设施设备等硬件方面具有优势,但其深度休闲度假理念及配套产品明显不足,需要突显其度假主题特色、开发度假体验产品、丰富客人度假生活、营造饭店独特度假氛围,从而提升度假饭店内涵及顾客感知价值。     

分数ID-消去图的邻域并条件

若删除G中任意一个独立集后得到的图依然是分数（g,f,m）-消去图,则称G为分数ID-（g,f,m）-消去图．将若干个关于分数消去图邻域并条件的结论推广到分数ID-消去图,证明了如下两个结论：1）阶为n的图G满足n≥12k＋6m-11,6（G）≥n/3＋k＋m,且／NG（x）UG（y）/≥2n/3对G中任意一对不相邻的顶点x,y都成立,则G是分数ID-（k,m）-消去图;2）若δ（G）≥（an/2a＋b）＋（b2（i-1）/a＋2m,n〉（（2a＋b）[i（a＋b）＋2m-2]）/a,且/NG（x1）u…uNG（x1）/≥（a＋b）n/2a＋b,对V（G）的所有独立集{x1,……,xi}都成立．则G是分数ID-（g,f,m）-消去图．