Inrecent years, the lattice Boltzmann method (LBM) has been utilized to simulate various complex flow situations, including multiphase flows, microflows,bioflows, and convection-diffusion and heat tra
In laser ignition system, to ignite the propellant, laser has to be transmitted into chamber through an optical window.If the optical window is destroyed by high pressure or high temperature, or conta
This paper investigates an interior ballistic design with equal and unequal web thicknesses of seven perforation propellant grains using optimization methods.In order to reveal the influences of the w
A Semiconductor Bridge (SCB) explosiveinitiator has many advantages such as shorter action time, better ignition consistency and higher reliability.The development of a SCB has traditionally been guid
027工程筏板式大体积钢筋混凝土基础,混凝土等级高,施工方量多、浇筑厚度大、质量要求严,浇筑时间恰逢高温季节,为了保证大体积混凝土基础底板顺利浇筑,针对工程特点,商品混凝土供需双方高度重视施工、生产技术与质量,根据以往的成功经验,认真策划,加强细节管理,重视过程控制,保障供应,并制定充分的预防措施和应急办法,确保基础底板浇筑目标的实现.
本文介绍了某工程地下室超厚大体积混凝土基础筏板与墙顶板在浇筑过程中因为原、辅材料的质量差异出现较大的波动,从而使混凝土的工作性能、耐久性发生了较大的变化;本文通过封样不同生产日期的原材料进行生产还原试验与配合比调整优化试验,找出了在特定情况下,即在无法避免使用同品种大差异原、辅材料时,为确保浇筑混凝土符合设计要求而采取的行之有效的配合比调整方法和必要措施.
镇江市苏宁广场是镇江的第一高楼,其基础筏板厚度大、强度要求高、一次性浇筑量大.为此,先进行了严谨的热工计算和保温控制计算.施工中严格控制,保证了大体积混凝土的顺利浇筑.
以氧化石墨和活性炭为原料,采用不同工艺制备了两种添加石墨烯的活性炭双电层电容器电极材料,研究结果表明添加石墨烯后活性炭的电化学性能有较大提高,添加工艺对材料结构和电化学性能有不同影响.添加石墨烯的活性炭材料在充放电电流密度为8mA/cm2时,采用先超声分散再还原制备工艺制备的电极材料(AC-rGO-1)的比电容可达190.5F/g,较未添加石墨烯的活性炭(AC)的比电容提高了18.6％,而采用先还