Windows下基于IRP机制的存储设备硬件信息查询

分析了Windows下的IRP工作机制,基于IRP机制给出了用户访问硬件信息的基本方法,并针对存储类设备基本信息查询,给出了具体的访问实现流程。     

椭圆形支护结构的简化计算

椭圆形支护结构是较为简单的拱形支护结构的一种,具有计算简单、经济合理优点,但关于其内力的设计计算方法研究的还很不够。本文以弹性板壳理论为基础,分析了椭圆形"壳体"支护结构的内力特点和设计控制内力的计算方法,对此类支护结构的工程应用具有一定的参考价值。     

矿化剂浓度对水热法合成氧化锌晶体的影响

In this paper different shapes of ZnO crystals were synthesized by hydrothermal method when different con-centrations of mineralizer were used. When KOH was less than 2mol·L^-1 and the fill factor was approximately 35% at 350℃, ZnO crystals were synthesized with size of several hundred nanometer or several micron. The shapes of crystals were hexagonal cones. When 3mol·L^-1 KOH was used as mineralize at 350℃ and the fill factor was approximately 35%, the crystals with many different sizes were synthesized, the size of maximal crystal was over 100 micron, the small-size crystals were only several micron. When mineralizer KOH was less than 1mol·L^-1 and the fill factor was approximately 35% at 430℃, ZnO crystals were synthesized with size of several hundred nanometer or several micron. The shapes of crystals were hexagonal cones. When 1.5mol·L^-1 KOH or 2mol·L^-1 KOH was used as mineralize at 430℃ and the fill factor was approximately 35%, the high quality and hexagonal prism crystals were synthesized with many different sizes, the size of maximal crystal was over 100 mi-cron, the small-size crystal was only several micron. Especially when 3mol·L^-1 KOH was used as mineralize at 430℃ and the fill factor was approximately 35%, the high quality and hexagonal prism crystals were synthesized with size of 1mm along c axis. The exposed faces were hexagonal faces m{1010}, hexagonal cone faces p{1011}, negative polar faces O{0001}. In addition, many crystals with the shape of hexagonal cone and in several micron to 50 μm of size were present. The exposed faces were hexagonal cone faces p{1011}, negative polar faces {0001}.