基于虚拟仪器的动车组制动系统仿真试验平台

基于虚拟仪器技术,本文设计一款CRH380B动车组制动系统仿真试验平台。该仿真试验平台以头车制动控制器实物为研究对象,利用计算机模拟和仿真技术实现其外围网络环境、电气控制和气动控制系统功能,完成仿真试验平台的搭建和测试。测试结果得到的制动响应数据与实车试验数据基本吻合。     

曼哈顿路网中移动数据点的连续概率Skyline查询

Skyline queries are widely used in location-based service systems. In recent years, various application queries in Manhattan road network have received considerable attention. Considering the uncertain continuous movement of objects in road networks, we mainly research the problem of continuous probabilistic Skyline queries for uncertain moving data points in Manhattan road networks. In such queries, the query point is considered to be stationary, and the objects in road network are treated as moving data points, which are described by the probability density function. First, we acquire the initial Skyline result set according to the initial location and static attributes of the data points, then, calculate the events that could cause the Skyline result set to change by the domination relations among those moving data points, and at last, update the probability Skyline result set according to the calculated events order so as to achieve continuous probability Skyline query. Experimental results show the efficiency and effectiveness of our proposed methods.     

BEST系统与常规系统的对比研究

为研究BEST系统和常规热力系统的区别,基于某超超临界1 000 MW二次再热机组的设计计算,使用EBSILON软件建立完整热力系统模型,然后从焓升分配,回热级数选择,再热压力优化,小汽轮机效率的影响等几个方面对比两种系统的异同点,并从热力学角度对其加以解释和说明。结果显示BEST系统的焓升分配更为均匀,回热级数选择需要考虑给水泵功率需求,最佳再热压力相对于常规系统压力更高,对小汽轮机效率的敏感性只有常规系统的一半。     

600 MW亚临界机组中速辊式磨煤机出口温度优化的研究

采用热重-红外联用技术在空气气氛下对煤样进行热重及CO析出情况分析,得到CO析出规律;对磨煤机出口CO理论析出浓度进行分析,该值与入口风温、出口温度和风煤比有关;在理论计算及实验室分析基础上,现场试验将磨煤机出口温度从80℃提高到95℃,实测磨煤机出口CO析出规律与理论值的趋势相同,各工况下实测最高CO浓度为103.3 mg/m~3,在安全范围内,依此对相关规程提出补充建议。     

PREPARATION OF ZnO CERAMIC POWDER BY SOL-GEL METHOD AND ITS VOLTAGE SENSITIVE PROPERTIES

ＰＲＥＰＡＲＡＴＩＯＮＯＦＺｎＯＣＥＲＡＭＩＣＰＯＷＤＥＲＢＹＳＯＬＧＥＬＭＥＴＨＯＤＡＮＤＩＴＳＶＯＬＴＡＧＥＳＥＮＳＩＴＩＶＥＰＲＯＰＥＲＴＩＥＳ①ＣｈｅｎＪｉａｎｘｕｎ,ＺｈａｏＲｕｉｒｏｎｇａｎｄＪｉａｎｇＨａｎｙｉｎｇＩｎｓｔｉｔｕｔｅｏ...     

BOND PARAMETERS AND ELECTRONIC STRUCTURE OF V, Nb AND Ta METALS

ＢＯＮＤＰＡＲＡＭＥＴＥＲＳＡＮＤＥＬＥＣＴＲＯＮＩＣＳＴＲＵＣＴＵＲＥＯＦＶ,ＮｂＡＮＤＴａＭＥＴＡＬＳ①ＧａｏＹｉｎｇｊｕｎ１,２,ＣｈｅｎＺｈｅｎｇｈｕａ１,ＨｕａｎｇＰｅｉｙｕｎ１ａｎｄＺｈｏｎｇＸｉａｐｉｎｇ２１ＲｅｓｅａｒｃｈＩｎｓｔｉｔ...     

FORMATION ENTHALPIES FOR FCC METAL BASED BINARY ALLOYS BY EMBEDDED ATOM METHOD

ＦＯＲＭＡＴＩＯＮＥＮＴＨＡＬＰＩＥＳＦＯＲＦＣＣＭＥＴＡＬＢＡＳＥＤＢＩＮＡＲＹＡＬＬＯＹＳＢＹＥＭＢＥＤＤＥＤＡＴＯＭＭＥＴＨＯＤ①ＯｕｙａｎｇＹｉｆａｎｇ１,ＺｈａｎｇＢａｎｇｗｅｉ２,３,ＬｉａｏＳｈｕｚｈｉ４,ＪｉｎＺｈａｎｐｅｎｇ５ａｎｄ...     

NUMERICAL PREDICTION OF PULSATING FLOW IN A LIQUID LINE WITH BRANCH OF HYDRAULIC SERVO SYSTEM

ＮＵＭＥＲＩＣＡＬＰＲＥＤＩＣＴＩＯＮＯＦＰＵＬＳＡＴＩＮＧＦＬＯＷＩＮＡＬＩＱＵＩＤＬＩＮＥＷＩＴＨＢＲＡＮＣＨＯＦＨＹＤＲＡＵＬＩＣＳＥＲＶＯＳＹＳＴＥＭ①ＨｅＹｏｎｇｓｅｎａｎｄＬｉｕＳｈａｏｙｉｎｇＣｈａｎｇｓｈａＩｎｓｔｉｔｕｔｅｏｆＭｉｎ...     

空调用贯流风机气动噪声预测的研究

基于N-S方程和雷诺输运应力方程(RSM),对空调用贯流风机进行了非稳态内流计算,并应用基于Lighthill声学类比理论的FW-H方程时域解法,预测了由叶轮表面压力波动和蜗舌表面压力波动所产生的远场气动噪声,同时还比较了不同蜗舌间隙对气动噪声的影响.