混合动力助力车车架结构强度分析及轻量化设计

以某混合动力助力车为研究对象,采用有限元方法对所设计的车架进行静态结构强度分析,得到了车架结构的应力分布图。以轻量化设计为出发点,在车架结构强度满足条件的前提下,对车架结构部分参数改进后的模型进行了进一步的分析,为混合动力助力车车架结构的优化设计以及轻量化设计提供了理论依据。     

锦屏一级水电站坝基f2断层水泥灌浆施工技术

断层及层间挤压错动带采用高压水冲洗置换灌浆的方式进行处理,能够冲洗出一部分软弱介质,冲洗后的空腔再采用水泥浆液进行置换固结灌浆,相当于在断层上施加了水泥柱桩,提高了断层基础的承载力。本文介绍锦屏一级水电站大坝左岸f2断层高压冲洗水泥置换灌浆加固施工技术的成功运用。     

Modeling of Light-Induced Changes in Reflectance Spectra: A Predictive Tool for the Effect of an Arbitrary Spectral Irradiance

Optical radiation is capable of altering the spectral reflectance of layers of colorants. Light damage is of particular importance in respect to unique historical objects in exhibitions. The major parameter governing this process is the spectral irradiance applied to the surface. As this may vary significantly for different light sources, an experimental investigation of the damage potential of the numerous illuminants available is a cumbersome task. In this work a numerical algorithm for the prediction of modifications of the spectral reflectance of colorants subject to a given arbitrary spectral irradiance over a given time is presented. It uses the temporal evolution of the spectral reflectance of the dye or pigment at issue when irradiated by a set of narrowband light sources as input data. The predicted reflectance spectra and the resulting color changes are compared to those measured for samples irradiated with common polychromatic light sources. The concept described in this work aims at the implementation of a standardized procedure and database for the prediction of radiative damage for a comprehensive range of pigments and dyes.     

通信基站通风节能研究

首先简要阐述了通信基站通风节能的现状及意义,然后对通信基站通风能耗情况进行了分析,最后研究了常见的措施对通信基站通风节能的效应。实践证明,该方案对基础运营商在节能减排、降本增效方面具有良好的效果。     

水电站建筑物课程实验建设的探讨

大学的扩招进一步导致教育资源的稀缺,最受影响的当属实验与实践教学环节的减弱。水电站建筑物作为水利工程专业的核心课程之一,具有内容多、知识面广、实践性强的特点,是一门老师授课难、学生学习痛苦的课程。若无较好的实验环节支持,学生的学习将变得空洞、无趣甚至不知所以。文章以三峡大学水电站建筑物的课程实验为例,介绍了该课程相关实验室的建设。实验室初步建成后,对教学效果有较明显的提升。     

一种光学分数傅里叶变换系统

An alternative way to perform fractional Fourier transform is proposed. The system is illuminated by a divergent beam. It has one more degree of freedom in arrangement than the previous system. Mathematically, the choice of focal length of one of the two lenses depends on an easily adjustable parameter which determines the location of illuminating point source.     

浅析"四两拨千斤"的力学原理及训练方法

文章通过对“借力用力”“、疏堵并用”“、化打并用”等具体拳技的力学原理分析,阐明了“四两拨千斤”技巧的原理,并尝试了提高“四两拨千斤”技能的一些有效训练方法。加强培养学员“四两拨千斤”的技能,在散手格斗或自卫防身中,应用价值较大,具有广泛的现实意义。     

男子轻量级单人双桨战术分析

通过对2002年赛艇世界杯和世界锦标赛男子轻量级单人双桨的战术进行分析，从中看出，不同的比赛运动员采用的战术是不同的，前3名与后3名选手的战术也是不同的，中国队与日本队的战术也是不同的。依此有针对性的制定了我国男子轻量级单人双桨运动员在亚运会比赛战术模式，完成了战胜日本队目标。     

图示操控远程分布式变电站集中控制系统的设计与实现

本文介绍一个基于图示操控的远程分布式变电站集中控制系统。该系统突破了传统的变电站运行管理系统与 综合防误系统相分离状态,提出了兼容二者的集控站在线实时监控模式;成功地整合并引入了当今的数据库管理系统 (DBMS)和地理信息系统(GIS)的最新技术:建立了集群控制与图示操控模型;创新了系统前端操作执行与反馈部件;从而将 变电站的安全运行和管理水平推向新境界。     

Undergraduates’ implementations of learning stations as their service learning among elementary school students

Service learning provides pre-service educators with a context for having hands-on field experience and also assists in understanding the theory and practice. This study discusses 7 undergraduates' implementations of learning stations as their service learning with 28 elementary school students. Through thematic data analysis of interviews, observation field notes, activity designs, and discussion posts, this study presented the following major findings. First, elementary school students, seven undergraduates, and a cooperative elementary school English teacher held positive attitudes towards the implementation of learning stations, because these developed children's cooperation and word recognition skills. Second, undergraduates and cooperative teachers gained professionalism through reflection and cooperation, in terms of activity designs, classroom management, and interpersonal skills development with kids and adults. Five suggestions are provided in order to effectively implement undergraduates' activity designs for learning stations as their service learning among elementary school students.