论荀子的“勇”

荀子根据"勇"与"义"、"利"的关系提出了"狗彘之勇"、"贾盗之勇"、"小人之勇"、"士君子之勇",只有"士君子之勇"是值得提倡的。荀子还将"勇"划分为上勇、中勇、下勇,认为只有上勇才是真正的大勇。真正的勇并不是先天具有的,是后天"人为"的结果,需要重视礼的作用,树立重义轻利的求荣避辱观念,通过师法不断培养才能形成。     

火星车三折平展坡道转移方案及转移姿态分析

以火星车从着陆平台安全转移至火星表面为研究目标,提出一种三折平展坡道转移方案。火星车坡道式转移方案难点在于,着陆点地形地貌不确定和着陆器自身姿态的不确定将导致火星车转移姿态不确定从而增大转移风险。为保证火星车坡道式转移安全性,开展火星车坡道式转移姿态分析,获得满足火星车安全转移要求的最小坡道长度并评价出极限转移姿态。为使三折坡道展开总长度尽可能靠近最小坡道长度需求,进行了三折坡道长度优化分析,获得在着陆器构型约束下三折坡道长度最大值,可为我国火星车转移工程实施提供借鉴。     

微波混频器测试技术研究

针对国内对微波器件筛选难的问题,进行微波混频器测试技术研究,描述了微波混频器的测试电路,给出微波混频器各参数的测试方法。目前,微波混频器已全面进入筛选测试阶段。     

民机电传飞控系统CCAR 25.672符合性验证思路研究

首先阐述民机电传飞控系统适航符合性验证的定义,然后详细介绍了民机电传飞控系统适航符合性方法和选用原则,最后以国内某型民用客机为研究对象,开展了针对CCAR25.672条款的符合性验证思路的分析与研究。     

基于“以证代考”模式的高职涉外旅游专业人才核心能力培养探析

改革传统的教学评价手段,注重实操,减少笔试是高职院校一系列教学改革中的重要环节。＂以证代考＂是一种强调实操,体现实际能力的考核方式。本文以导游证为例,在设计、实施、促进能力培养的效果和存在问题等方面做一些探讨。     

United Nations Human Space Technology Initiative (HSTI)

The Human Space Technology Initiative was launched in 2010 within the framework of the United Nations Programme on Space Applications implemented by the Office for Outer Space Affairs of the United Nations. It aims to involve more countries in activities related to human spaceflight and space exploration and to increase the benefits from the outcome of such activities through international cooperation, to make space exploration a truly international effort.     

Self-perspiration garment for extravehicular activity improves skin cooling effects without raising humidity

Introduction

The current U.S. extravehicular activity (EVA) suit in space includes liquid cooling and ventilation garment (LCVG) to control thermal condition. Tubes knitted in LCVG for flowing water interrupt evaporation of perspiration, and astronauts feel discomfort. In the present study, we hypothesized that a self-perspiration garment would effectively lower the skin temperature without raising humidity in the garment. Thus, we developed and examined the effects of the garment.

Methods

Eight healthy subjects were studied with a cyclic ergometer of 30, 60 90 and 120 W loading for 3 min each. Skin temperature and humidity on the back were measured continuously. Subjects wore and tested three types of garments i.e., a spandex wear without any cooling device (Normal), a simulated LCVG (s-LCVG) or the spandex wear knitted a vinyl tube for flowing water, and the spandex wear with a tube, which flows water and self-perspiration with oozing water for evaporative cooling (SPEC).

Results

All measurements were reached to steady state 2–3 min after the setting. The s-LCVG decreased skin temperature 0.39±0.14 °C during 12 min of cooling. With SPEC, skin temperature did not decrease significantly until 6–9 min after starting the cooling. However, the temperature decreased rapidly and significantly after that, and finally decreased 1.59±0.32 °C. Humidity in the SPEC was significantly lower than that in s-LCVG.

Discussion

SPEC was effective for lowering skin temperature without raising humidity in the garment. The concept is expected to use as a better cooling system during EVA.     

改进高职英语听力教学的策略--兼评2005年6月高等学校英语应用能力听力部分考试

基于2005年6月湖南地区进行的高等学校英语应用能力考试听力理解部分试卷和答卷情况的深入分析,结合实际,讨论反映在教学中的主要问题,并提出如何改进听力理解教学工作的建议。     

火箭发动机气体-颗粒两相流双流体模型研究

探讨了两相流双流体模型中颗粒相压强、两相界面压强以及两相界面速度等若干关键问题,从理论上推导了双流体模型的控制方程,并讨论了颗粒相控制方程的双曲性.把LU隐式时间格式和Van-Leer矢通量分裂格式应用到两相流双流体模型中,并对一维等截面传热摩擦管道和轴对称JPL喷管中气固两相流进行了计算,计算结果与文献结果吻合良好,所建数学模型正确,所用数值计算方法可靠.     

基于建构主义理论抛锚式教学模型的ESP教学设计——以《客舱乘务英语》为例

基于建构主义理论指导下的抛锚式教学,强调以真实事件或真实问题作为教学活动的基础。本文针对当前高校ESP课堂教学的现状,简要分析了存在的问题及原因,由此引入建构主义学习理论的观点,并对将抛锚式教学方法融入到客舱乘务英语课的教学进行例析,以期改变传统ESP课堂教学的弊端,实现ESP以学习为中心的教学原则。