彝族火葬文化初探

彝族火葬历史悠久,至今川、滇部分彝族仍然保留着火葬习俗。彝族火葬是建立在《指路经》中“万物有灵”和火是圣洁的,火具有除秽净交功能的观念基础上的,向天坟是彝族火葬台。     

微机量热仪的点火控制方式对发热量测值的影响

国产微机量热仪不同的点火方式对煤的发热量测值有着显著影响．通过与国标方法对比分析，总结得出搅拌5min再点火是较合理的点火方式，从而解决了国产微机量热仪测值偏高的问题，为煤炭以质计价提供了公正可靠的计量方法．     

关于男子低重心标枪出手条件的分析

在标枪风洞测力实验基础上,建立标枪飞行数理模型进行计算机优化,得到了有规律的结论,结合投掷实践分析了标枪出手适宜条件。出手初速在25m/s～30m/s的范围内,最佳出手条件是:投掷角为40°,迎角为-11°。就投掷成绩而言,负攻角比零攻角好,零攻角又比正攻角好。低重心标枪俯仰力矩值比旧标枪大,低重心标枪出手条件不好,投掷成绩下降幅度比旧标枪大。一般情况下投掷角不能小,攻角绝对值不能大,这样相应成绩更好些。投掷标枪不能沿纵轴用力,也不可能沿纵轴用力。标枪以不为零的攻角出手是获得空气动力效率的充分必要条件。     

船舶高级消防强化培训的意义及对策

近年来,我国船舶火灾事故呈上升趋势,形势严峻.因船员未能及时采取有效措施,致使火势蔓延、船毁人亡的事故屡见不鲜.本文就如何强化船员高级消防的培训,提高消防综合演练的质量,进一步加强船员消防意识和提高灭火自救的能力,提出了一些对策和建议.     

高中数学研究型教学实践与探索

高中数学研究型教学的核心理念是学习即研究,教学即研究指导;其基本模式是"五环十步"——呈现背景、提出问题;联想激活、寻求方法;提出猜想、验证猜想;运用巩固、内化迁移;回顾反思、拓展问题。高中数学研究型教学模式及其设计模型能较好地改进和优化教学,提升学生的核心素养。     

影响我国水成膜泡沫灭火剂灭火性能因素分析

从影响水成膜泡沫（AFFF）灭火剂灭火性能的几个主要因素出发，分析了困扰我国AFFF灭火剂灭火性能的主要原因，对发展我国AFFF灭火剂技术提出了几点建议。     

水中悬浮隧道锚索在剪切流中的涡激响应

以Iwan改进的尾流振子模型为基础，给出了剪切流中水中悬浮隧道锚索横向涡激振动的工程分析方法，分析了悬浮隧道重浮比以及剪切流特性对锚索涡激响应的影响。计算结果表明，悬浮隧道重浮比的改变，使锚索各阶模态的频锁区域分布发生变化，从而改变了结构的涡激振动响应；剪切流陡度参数的增大会使锚索涡激响应的幅值减小，若使用均匀流场代替剪切流场计算悬浮隧道锚索的涡激振动，会过高估计其响应幅值。     

Simplified analysis for reflective overpressure on walls of rectangle-section tunnel due to its inner-explosion

Based on the constructing thought of the displacement model of isoparametric finite element, an extended interpolating algorithm is deduced for calculating the overpressure history of an optional point on the walls of the rectangle-section tunnel under an optional point-explosion in its internal space. According to the working principle, the overpressure histories of all nodes on the walls of a tunnel with the equal width and height of 2 m, induced by a reference-charge explosion at each node in this tunnel's cross section, are computed using the LS-DYNA software, and then are gathered to establish a reference database, which makes it possible to set optionally the positions of the explosive and the overpressure-observed point. In addition, some variation factors of peak values and durations of overpressure on the walls, reflecting some changes on the charge weight and the sizes of width and height of the section, are included in this algorithm in order to simulate approximately the overpressure responses on the walls under the optional charge weight and cross-section size. Some example analyses indicate the rapidity and validity of this method, and therefore this will bring it a good prospect in engineering application.     

Test and Analysis of an Existing Tunnel Vibration Induced by Blasting Construction of Diaphragm Wall

According to the blasting construction of the diaphragm wall of Puxi approaching section of East Fuxing Road river-crossing tunnel, the monitoring project of the vibration of the existing tun-nel induced by the blasting construction is put forward, which includes the sensors’ location, moni-tor method and the vibration monitoring system. Based on the monitoring data of the explosion vibration, the vibration wave forms, velocities, acceleration responses, main frequencies and fields of measure points are analyzed under the conditions of three locations and different charge quanti-ties. According to the safety-judging standard of explosion vibration, the conclusion that the exist- ing tunnel is safe under the explosion vibration is then drawn. Furthermore, the spectrum character-istics of three explosion vibrations and the spectrum changing properties of explosion vi-bration wave transmitting in different directions are concluded, which can provide reference to similar projects.     

列车对半椭圆形隧道中电磁波截止频率的影响

将隧道看成波导,列车的存在改变了隧道的截面形状和尺寸,从而影响了电磁波的截止频率.在对列车—隧道导波问题进行物理建模的基础上,应用有限元法研究了列车的高度、宽度和位置以及半椭圆形隧道椭圆的偏心率的变化对半椭圆形隧道电磁波截止频率的影响.