Popularity and Social Preference in Chinese Adolescents: Associations with Social and Behavioral Adjustment

This study examined the characteristics associated with popularity and social preference in 769 14‐year‐old adolescents (54 percent boys) from mainland China. Consistent with findings from other countries, popularity and social preference were moderately correlated and overt aggression was positively correlated with popularity but negatively correlated with social preference. Prosocial behavior, athletic skill, dating, academic achievement, and mutual friends were positively associated with both popularity and social preference, with the effects for prosocial behavior, athletic skill, and dating greater for popularity than for social preference. The strong correlations between popularity and prosocial behavior are consistent with Confucian ideas of moral leadership and the obligations of high status individuals toward others. Cultural values are also reflected in the association of popularity with academic achievement. The inconsistent findings from China regarding the relation between aggression and popularity may stem from multiple factors including the absence of a suitable Chinese translation for popularity.     

Global kernel estimator and test of varying‐coefficient autoregressive model

We propose a varying‐coefficient autoregressive model that contains additive models, varying‐ coefficient models, partially linear models and low‐dimensional interaction models as special cases. A global kernel backfitting method is proposed for the estimation and inference of parameters and unknown functions in this model. Key large‐sample results are established, including estimation consistency, asymptotic normality and the generalized likelihood ratio test for parameters and non‐parametric functions. The proposed methodology is examined by simulation studies and applied to examine the relationship between suicide news reports in the three leading newspapers and the daily number of suicides in Taiwan. The relationship between the media reporting and suicide incidence has been established and explored. The Canadian Journal of Statistics 47: 487–519; 2019 © 2019 Statistical Society of Canada     

石蜡的溶蚀特征及其产物的红外光谱分析

针对非原油生产中石蜡从使用对象及其表面清除的问题，通过测定石蜡在几种常见试剂中的失重率、清蜡速度和溶解度等，研究了石蜡的溶蚀特征，并采用红外吸收光谱对溶蚀产物进行分析，结果表明：石蜡对香蕉水、丙酮等具有较强的抵御能力，并具有优良的抗酸、碱腐蚀性能；汽油、松香水、乙醚等三种试剂对石蜡都有较好的溶蚀效果，其溶解速度在第一小时内最快，之后变慢，9h后逐渐达到饱和；它们的清蜡速度分别是1.0、0.9、2.9mg/(ml·min)，溶解度分别是11.8、9.4、6.0，二者并没有呈现正相关关系；红外吸收光谱分析结果表明，三种试剂的溶蚀产物都是由石蜡和复杂含氧化合物组成，其中，松香水和乙醚两种试剂的溶蚀产物以石蜡为主，而汽油溶蚀产物以复杂含氧化合物为主；另外，溶蚀产物中复杂含氧化合物的熔点低于石蜡。     

Scalar politics,language ideologies,and the sociolinguistics of globalization among transnational Korean professionals in Hong Kong

This paper argues that the sociolinguistics of globalization is accompanied by a constitutive scalar politics. Based on ten interviews with Korean professionals in Hong Kong, we report that Korean migrants’ use and experience of English is characterized by competing language ideologies we identify as: Pragmatic English/Perfect English, Multilingualism/English Only, and Global Language/Local Language. Tensions within these ideologies were revealed as respondents referenced the contexts of their daily lives as intersecting sets of geographic, temporal, and social scales. We discuss how sociolinguistic relations associated with the transnational lifecourse, hybridizing identity, and racialization were imagined in ways that re‐negotiated these scales to serve the interests of the participants and provide coherence to their communicative practices. Sociolinguistic relations both reference scales and constitute them. We conclude that attending to scales and scalar politics provides a better explanatory framework for the ways the uneven linguistics markets of globalization are negotiated by transnational subjects.     

提高数字化教学平台的教学应用水平

推进数字化教学平台建设是实现教学手段信息化的重要基础,但是,数字化教学平台目前存在＂重建设、轻运营＂的现象,数字化教学平台不能发挥其应有的作用,造成了教育资源的浪费。本文从提高数字化教学平台的教学应用水平角度,分析了目前数字化教学平台的应用状况,针对存在问题提出改进对策。     

理工科学生进行ERP沙盘模拟实训的探讨

为把理工科学生培养成为既掌握专业技术又具有管理能力的应用型人才,进行ERP沙盘模拟实训是一项必要的实践教学内容.本文阐述了理工科学生进行ERP沙盘模拟实训的必要性,并提出针对理工科学生的特点进行ERP沙盘模拟实训的具体方案.     

机械系统辅助概念设计的演化方法

在对设计过程的深刻认识基础上,本文提出并分析了机械系统辅助概念设计的演化模型CBED,结合机械系统的领域特征和演化个体的实例表达,对一般的演化算法进行了扩展和修正,包括建立在功能实现最小系统概念基础上的功能衍生算子及与交叉、变异算子和补足算子的结合、父体功能-结构分析算子和结构合并算子等.     

声区的统一在歌唱中的地位与作用

本文阐述了声区统一在歌唱中的重要性 ,提出了中声区是声区统一的基础环节 ,过渡音是声区统一的关键环节     

构建"大成都经济圈"初探

世纪之交,中国西部迎来了前所未有的新机遇.一个西部大开发、大开放、大发展的时代已经来临.作为一个西部欠发达的大省,四川必须抓住历史赋予的这次机遇,加速经济发展,实现新的腾飞.在此背景下,笔者认为构建"大成都经济圈",走城市经济的发展道路,从而带动全省经济快速发展已显得尤为迫切.     

工科无机化学元素部分教学内容和方法的改革

介绍了在无机化学元素教学过程中对教学内容和方法改革的一些作法,提出了以学生为中心,使教与学,学与做融为一体的化学教学新概念.通过改革授课内容,开展小型科研,介绍学科前沿,以及所学化学知识的应用实践,从而达到培养学生解决问题的能力和创新能力的目的.