12V 180型内燃机滑油稀释原因分析

针对东方红35型机车12V180型发动机喷油器连接管接头漏油问题进行了分析,并提出了解决该问题的方案。     

当代新型用户需求与地方文献信息服务——首都图书馆"地方文献专题信息服务"程序分析

１背景与观念的转化在传统的图书馆学理论中,“参考咨询工作的实质是以文献为根据,通过个别解答的方式,有针对性地向读者提供具体的文献、文献知识或文献检索途径的一项服务工作”。在实际工作中,图书馆工作者收集、编制各种通报性和专题性的书目、索引、文摘、快报等...     

自行车运动员智能辅助训练系统的设计与开发

为了帮助运动员们更好更快地提高专业水平,利用科学的训练方法和先进的智能设备已经成为一种趋势。根据专业自行车训练的基本要求和特点,并结合实时的数据分析和处理,制定了一套科学高效的训练方法;通过软硬件的结合,本系统模拟出了真实比赛中的赛道环境,能够减少外部因素对运动员模拟训练的制约,创造更加真实、便捷的训练途径。该系统具有方便快捷、交互友好、科学高效、节能环保的特点,可以克服专业教练和训练场地的制约,帮助运动员在更短的时间内更快地提高竞技水平,具有很好的应用价值。     

Prenatal Maternal Stress,Child Cortical Thickness,and Adolescent Depressive Symptoms

Prenatal maternal stress predicts subsequent elevations in youth depressive symptoms, but the neural processes associated with these links are unclear. This study evaluated whether prenatal maternal stress is associated with child brain development, and adolescent depressive symptoms using a prospective design with 74 mother child pairs (40 boys). Maternal stress was assessed during pregnancy, child cortical thickness at age 7, and depressive symptoms at age 12. Prenatal maternal stress was associated with less cortical thickness primarily in frontal and temporal regions and with elevated depressive symptoms; child cortical thickness additionally correlated with adolescent depressive symptoms. The observed associations are consistent with the possibility that cortical thickness in superior frontal regions links associations between prenatal maternal stress and adolescent depressive symptoms.     

Classification Consistency and Accuracy With Atypical Score Distributions

The current study aims to evaluate the performance of three non-IRT procedures (i.e., normal approximation, Livingston-Lewis, and compound multinomial) for estimating classification indices when the observed score distribution shows atypical patterns: (a) bimodality, (b) structural (i.e., systematic) bumpiness, or (c) structural zeros (i.e., no frequencies). Under a bimodal distribution, the normal approximation procedure produced substantially large bias. For a distribution with structural bumpiness, the compound multinomial procedure tended to introduce larger bias. Under a distribution with structural zeroes, the relative performance of selected estimation procedures depended on cut score location and the sample-size conditions. In general, the differences in estimation errors among the three procedures were not substantially large.     

The education of academically gifted students in South Korea: Innovative approaches in shadow education

Shadow education contributes to the learning and academic careers of Korean students. It benefits, in particular, gifted students who are strongly motivated and who outperform their peers academically. In this study, we explored the innovative characteristics of shadow education curricula for gifted students in terms of curricular programmes, methods, and teaching-learning materials. Also, we explored how shadow education practices meet the academic abilities and needs of students. Informed by a literature review and qualitative research methods, the results reveal how common shadow education is; effects of shadow education; and innovative elements used in shadow education for gifted students in Korea. Overall, we found that shadow education plays a crucial role in gifted education; it is a necessary component for understanding academic excellence among students in Korea. The findings are helpful for teachers, curriculum developers, and policymakers as they explore how public schooling can help to support strongly motivated and academically advanced students.     

组织学习与绩效的关系:创新是中介变量吗?--珠三角地区企业的实证研究及其启示

近年来,组织学习的企业文化被认为是企业取得竞争优势的关键因素。虽然很多学者相信组织创新在组织学习与组织绩效之间起了中介作用,但却极少有研究给出实证的结果。改革开放以来,我国许多企业开始引入组织学习的管理观念,然而这种观念是否以及如何影响企业的绩效？国内外学术界尚未发表以中国大陆数据为基础的实证结果,也就是说我国企业倡导组织学习的经营理念有一定的盲目性。本文以我国华南地区企业等为调查对象,对组织学习是否以及如何通过组织创新影响组织的绩效进行实证研究。结果表明,组织学习对管理创新和技术创新都有显著的直接影响,而且通过这两个因素对组织绩效都有显著的正向影响．管理创新在组织学习一组织创新一组织绩效链中起到了至关重要的作用,是通过组织学习提升组织绩效的瓶颈。     

论元散曲隐逸思想的三大要素

隐逸思想是元散曲的重要主题之一。在元散曲的隐逸思想之中包含有三大要素,即：用历史意识慨叹社会,用天命意识参悟人生,用生命意识强调自我。命途多舛沉郁困顿的散曲作家们正是藉着这三种意识的支撑,在苟全性命的同时获得了灵魂的高蹈和生命的舒展。     

高职翻译课程设置与教学内容改革研究

高职翻译应定位于初级交际型翻译。根据高职翻译的定位以及翻译能力的界定,高职翻译课程设置可以打破传统模式,以双向口笔译的方式设置阶梯式综合翻译课程,在教学上以工作流程内容为主,体现行业和区域特色。各高职院校可根据自身特色开设专业性强的翻译课程,培养适应社会的翻译人才。