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Influence of ribs on train aerodynamic performancesMIAO Xiu-juan(苗秀娟)1, GAO Guang-jun(高广军)2(1. College of Automobile and Machinery Engineering, Changsha University of Science and Technology, Changsha 410076, China;2. Key Laboratory of Traffic Safety on the Track of Ministry of Education (Central South University),Changsha 410075, China)Abstract:The influence of ribs on the train aerodynamic......
influence estimator and repeated median estimator were introduced. These methods were tested using a set of standard data. At last, simulated data added by noise at different levels were processed..., the results estimated by the bounded influence method are acceptable, which are more stable than those estimated by the M-regression method. So, in the magnetotelluric data processing, the repeated median......
. Postdoctor Station of Daye Nonferrous Metal Company, Huangshi 435005, China) Abstract: By analyzing the influence degree of cohesion c and friction angle of geotechnical materials of slope after... increased by a small amount. The analysis results can reflect the influence degrees of cohesion and friction angle on the stability of slope. There exists a equivalent influence angle θe(34.1?), if β=θe......
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在配煤中添加煤粉改性剂对焦炭质量的影响田辉1,朱子宗1,兰天1,盛建文2,王鑫海2(1.重庆市重庆大学材料科学与工程学院2.南京钢铁股份有限公司,江苏南京 210035)摘 要:在南钢40kg实验焦炉开展配加非炼焦煤炼焦实验,研究了在配煤中添加煤粉改性剂(zzz)对配合煤,焦炭质量的影响.采取不同配量的改性剂添加方案进行配煤炼焦实验,通过实验确定出最佳配煤方案:非炼焦煤配加量达到15%(粒度小于3mm),煤粉改性剂添加量为0.10%.最佳配煤方案中添加改性剂与未添加改性剂炼出的焦炭质量相比,灰分,硫分基本保持不......
水平轴风机气动性能影响因素研究 薛忠民1,李军向1,王继辉2 (1.北京玻钢院复合材料有限公司,北京,102101;2.武汉理工大学材料科学与工程学院,武汉,430070) 摘要:设计高性能水平轴风机是如今风机设计的趋势.风机工作环境恶劣,要计算所有因素对风机性能的影响不太现实.本文运用动量理论和叶素理论分析了实度,桨矩角,锥角,倾角和叶片厚度对风轮气动性能的影响.分析表明,风轮气动性能对实度,桨矩角敏感度高,叶片厚度对风轮气动性能影响不大.对敏感参数进行优化设计,有利于风机在低成本情况下提高其性能. 关键词:气动性能; 影响因素; 水平轴风机; 动量; 叶素; aerodynamic performance; influence factor; horizontal axis wind turbine; momentum; blade element; [全文内容正在添加中] ......
:TH89 文献标志码:A 文章编号:1672-7207(2016)03-1044-05 Concentration influence on light transmission... Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China) Abstract: For the influence on the light transmission......
量,以u为因变量的隐函数.阶段Ⅰ和Ⅱ在蠕变突变发生机制方面具有代表性,相关性和可比性,因此,分析采空区群系统失稳因素,主要针对这2个阶段进行对比.当其他自变量值一定时,绘制单个自变量对因变量u的影响曲线,如图11和图12所示. 图11 阶段Ⅰ影响因子对顶板下沉位移的影响 Fig. 11 Influence of various factors on roof sinking...段Ⅰ与阶段Ⅱ中矿柱面积支撑率 ξ 趋于相近,这说明当采场参数较大时,固支模型和简支模型对采场顶板位移影响不明显. 图12 阶段Ⅱ影响因子对顶板下沉位移的影响 Fig. 12 Influence of various factors on roof sinking displacement in stage Ⅱ 图13 不同采场矿柱稳定支撑率的临界值 Fig. 13 Critical value......
distribution of vertical fluctuating velocity in two-phase flow. In order to study the influence of various factors on slurry mass fraction distribution, experiments on the work and rheological properties..., initial shear stress and particle shape. The mass fraction distribution has the same trend with depth when the n reflecting the influence of solid-liquid two-phase characteristics on the characteristic......