导高职学生走进健身广场提升运动技能的探析

学校体育工作不仅是教育事业的有机组成部分,而且是全民健身事业的重要内容,还是全体公民终身体育的教育基础,为了使学生全面适应社会的发展,跟上时代的步伐,我们必须开发有效的学习手段来增强学生的学习能力,以适应现代教学需要和社会的需求。     

用新型除油器进行伴生气分离

随着喇嘛甸油田冷榆的大面积推广,为解决由于伴生气分离效果不好而导致外输气管线、炉前燃烧器容易冻堵的问题,对伴生气除油、脱水技术和工艺进行研究.通过对组合捕雾器、旋流折转分离装置和除油器改进,使伴生气系统除油,降温及脱水工艺形成了密闭、自动和高效的循环体系,降低了伴生气的湿度,保证了系统安全、可靠的运行,解决了外输气管线冻堵、分离缓冲游离水脱除器压力偏高的问题.     

Optimal deployment of multiple passive sensors in the sense of minimum concentration ellipse

In the sense of minimum concentration ellipse, the optimal deployment of multiple passive sensors in bearing-only location system is studied in terms of cut angle. It is found that the optimum cut angle depends only on l, the ratio of the distance between target and the baseline of the two sensors to the baseline length. When l is greater than 0.5, the optimum cut angle can be obtained if the deployment of the target and the two passive sensors is an isosceles triangle with the baseline length as its base side. When l is less than 0.5, the optimum cut angle can be obtained if the target and the two passive sensors are located on the circle with the baseline length as its diameter, that is, the deployment of the target and the two passive sensors being a right triangle. When l equals 0.5, the optimum cut angle can be obtained if the target and the two passive sensors are deployed on an isosceles right triangle. The global minimum value of concentration ellipse can be asymptotically reached by decreasing the ratio l to zero based on these properties of the optimum cut angle.     

Modeling of mechanical response of FRP composites in fire

A thermomechanical model is presented for predicting the time-dependent deflections of cellular FRP slab elements subjected to mechanical loading and fire from one side. The model comprises temperature-dependent mechanical property sub-models for the Young’s modulus, viscosity and coefficient of thermal expansion. Two different thermal boundary conditions were investigated: with and without liquid-cooling of the slab elements in the cells. A finite difference method was used to calculate the deflection at each time step. Deflections resulting from stiffness degradation due to glass transition and decomposition of the resin dominated over those resulting from viscosity and thermal expansion. The predicted total deflections compared well with the measured results over a test period of up to 2 h. The failure mode of the non-cooled specimen could be explained.     

交通设计在城市道路工程设计中的应用

随着经济的发展，交通设计是解决大城市交通拥挤的一种有效措施。以北京市京开高速公路桥下道路改造工程设计为例，阐述了交通设计在城市道路工程设计中是如何应用的，以期对其它正在进行道路交通建设的城市具有参考作用。     

矿用隔爆型三相异步电动机提高能效的设计与分析

针对当前矿用电机效率偏低的状况及造成偏低的因素，并具体结合矿用隔爆型电机YB2-315L1-4的改进设计，分别从设计、原材料采用、制造等角度进行了研究，并结合试验给出了对铁心损耗、铜耗、机械损耗等详细的试验数据分析，提出了较为有效的设计方法和技术措施，确定了新的设计方案，样机的试验结果验证了设计方法的有效性，对提高矿用隔爆型三相异步电动机的能效具有实际的指导意义。     

论我国电力电子产业发展

电力电子产业是我国工业领域的一个基础产业,是装备制造业的一个分支。这一点未必能得到很多人的认同,但是,从目前电力电子技术广泛应用和渗透情况已经可以得出这个结论。     

中国结·塞上结回汉——银川火车站方案设计

在城市越来越失去特色的今天,为了找回对城市的印象,我们必须将地域文化融入到建筑设计中来.     

人机工程学在配管工程中的应用

人机工程学是近年来引入我国工程设计领域的一门新课题,其目的在于获得最高的效率及作业时感到安全和舒适。文章着重介绍人机工程学在石油化工工程中的应用以及在配管安装设计过程中应考虑的因素,从装置设备以及管道阀门的操作、维护和检修等方面进行了探讨,目的是使设计更为合理,更为人性化。