Novel high torque bearingless two-sided rotary ultrasonic motor

Applications are limited at present because the currently available ultrasonic motors (USMs) do not provide suffi-ciently high torque and power. The conventional travelling-wave USM needs the bearing to support, which required lubricant. To solve the above problem, a bearingless travelling-wave USM is designed. First, a novel structure of the two-sided USM consisting of a two-sided teeth stator and two disk-type rotors is designed. And the excitation principle of the two-sided travelling-wave USM is analyzed. Then, using ANSYS software, we set up the model of the stator to predict the excitation frequency and modal response of the stator. The shape of the vibration mode was obtained. Last, the load characteristics of the USM are measured using ex-perimental method. The maximum stall torque and the no-load speed were obtained. The results showed that the characteristics of the two-sided USM are better than those of the conventional one-sided USM.     

Conflict, Social Competence, and Gender: Maternal and Peer Contexts

The current study was designed to address two major purposes. The first goal was to investigate the joint influence of children's sociometric status and sex on their conflict behavior, and the second goal was to explore the similarities and differences in children's conflict behavior across two contexts, specifically conflicts arising during interactions with mothers and with peers. Forty-two first-graders were videotaped playing with their mothers and then with an unfamiliar peer partner. Conflict behavior occurring in the mother-child context was quite different from that occurring between children, reflecting the contrast between the vertical and horizontal nature of these relationships. Most striking were the large number of sociometric status and sex differences in conflict behavior found across both contexts. Further, it appears that effective conflict behavior may differ for boys and girls. Implications for future research are discussed.     

集值映象与随机集值映象的几个不动点定理

在本文中我们得到了关于集值映象与随机集值映象的几个新的不动点定理,扩充了[3]中结果,主要结果是定理1—3与定理6—7     

浅议高校共青团学生干部队伍建设

本文论述了高等学校共青团学生干部队伍的重要性，并对如何进行高校共青团干部队伍建设进行了有益的探讨。     

基于等级反应模型的CAT系统的研究和开发

计算机化自适应测验是现代测验研究中的一个重要领域,而目前大多研究都基于0-1评分模型,适用范围不广。本文对Samejima等级反应模型进行探讨和研究,运用DELPHI开发研制多级评分计算机化自适应测验。     

Resilience in higher education students: a scoping review

ABSTRACT

The health, wellbeing and employability of university students are key considerations within higher education. In response, interest in student resilience is on the rise. Reviews of contemporary resilience literature highlight both conceptual and methodological weaknesses, issues which hamper attempts to design effective resilience interventions. To inform the design of a student resilience program, to be piloted at three Australian universities, a scoping review of resilience specific to the higher education context was undertaken. Searches of three electronic databases (PsychINFO, CINAHL and ProQuest) were conducted. Seventy-two peer-reviewed articles published between 2007 and 2017 were included in the review. While the review reaffirms the conceptual and methodological issues found in previous resilience research, it provides a useful critique of key issues in relation to university student resilience and interventions to enhance students’ resilience. Recommendations for educators and researchers are provided.     

Intellectual Disability and Developmental Risk: Promoting Intervention to Improve Child and Family Well‐Being

Initial intervention processes for children with intellectual disabilities (IDs) largely focused on direct efforts to impact core cognitive and academic deficits associated with the diagnosis. Recent research on risk processes in families of children with ID, however, has influenced new developmental system approaches to early intervention. Recent risk and resilience processes are reviewed that connect stress, family process, and the high rates of behavioral problems in children with ID that have substantial influence on child and family outcomes. These models are linked to emerging evidence‐based intervention processes that focus on strategic parent skill training and mindfulness interventions that reduce parental stress and create indirect benefits for children's behavioral competencies. A family‐focused developmental systems approach (M. J. Guralnick, 2011) is emphasized.     

着眼于主体发展:关于德育功能的新思考

本文从马克思主义关于人的本质理论和个体社会化理论出发,对传统的德育功能观做了系统考察,指出了传统德育功能观存在着的重大问题;概述了主体性德育的相关主张以及对于新德育功能观所做出的贡献。提出要将德育功能问题的考察还给德育本身;要站在主体性德育理论的成果上,着眼于德育对象(作为社会关系主体的人)的主体发展,从人的本质理论和个体社会化理论出发,来研究德育功能,确立一种新的德育功能观。     

美国本科教学的启示——以北亚利桑那大学为例

美国北亚利桑那大学本科教学具有如下特点:成熟且富有成效的管理制度、有序安排课程表和课程教学、丰富而高效的网络资源、相互协作的教学风格、学生的积极参与和充分的师生互动、多样而综合的考核方式等。北亚利桑那大学的本科教学对我国本科教学有很大启示,给学生更多自主选择、尽快完成数字化课程网络辅助教学平台建设、增加师生互动、综合考评学生等。     

从高职学生就业流向看就业资源的重点开发

解决高职毕业生就业问题除了发挥高职人才培养特色,强化学生职业素质,加强技能培训外,重点开发就业资源,形成稳定的毕业生就业市场,也是解决高职毕业生就业的重要途径。高职院校必须认真分析毕业生就业流向状况,开发与利用相对稳定的就业资源,保障高职教育事业的蓬勃发展。