二叉分裂算法的随机路径长度

用泊松变换的方法研究了由二叉分裂算法所产生的随机树上的随机路径的长度,首次得到了关于其数学期望的确切表达式.在此基础上,对该期望的渐近性状进行了分析,证明了当被分裂的集合的大小n趋于无穷时,随机路径长度的期望具有log2n的阶.     

Influence of rarefaction wave on premixed flame structure and propagation behavior

To explore the influence of rarefaction wave on the structure and propagation behavior of the premixed propane/air flame in a rectangle combustion pipe, the techniques of high speed Schlieren photograph method, pressure measurement and so on are used to study the interaction processes between rarefaction wave and flame. Two cases of rarefaction wave-flame interaction were performed in the experiment. The experimental result shows that both the rarefaction waves can cause the flame transition from laminar to turbulent combustion quickly. The cowflow rarefaction wave decreases the flame speed, while the counterflow rarefaction wave leads the flame propagation speed to increasing on the whole, accompanied with sharp vibration.     

基于RTDX技术的多用户检测实验平台设计

介绍了一种基于RTDX技术的多用户检测试验平台设计方法,同时阐述了如何利用RTDX技术实现多用户检测试验平台设计的具体方法。     

板几何中一类具非对称散射裂变核的迁移算子的谱

研究了板几何中一类具非对称散射裂变核的迁移算子的谱，证明了该算子在右半平面无复本征值和存在有限个具有限代数重数的实离散本征值。     

The concentration quenching characteristics of ~5D_3-~7F_J and ~5D_4-~7F_J (J=0―6) transitions of Tb~(3 ) in YBO_3:Tb~(3 ) phosphor

The photoluminescence quenching behaviors of 5D3-7FJ and 5D4-7FJ (J = 0―6) transitions of Tb3 in YBO3:Tb under 130―290 nm excitation were systematically investigated. The results revealed that the quenching concentrations of both 5D3-7FJ and 5D4-7FJ transitions of Tb3 in YBO3:Tb were mainly de-pendent on excitation wavelength. Particularly,the quenching concentrations of 5D4-7FJ transitions of Tb3 under 130―290 nm excitation were correlated with excitation bands of YBO3:Tb. The quenching concentrations of 5D3-7FJ transitions remained at low concentration (2%) under 186―290 nm excitation and then increased gradually with energy of incoming excitation photon when excited at 130―186 nm. This dependence should be involved in their excitation mechanisms and quenching pathway in particular excitation region.     

仅用1表示数的最少个数

设n为正整数,f(n)是可以用1以及任意多个 号和×号(以及括号)来表示n时所用1的最少的个数.本文确定了n在若干情形时f(n)的值,改进了参考文献的部分结果,并提出了若干新的猜想.     

用硫化物沉淀法脱除甲基紫染料中的铜

在pH为2～3的硫酸介质中,缓慢加入稀硫化钠溶液,可以将甲基紫染料中的铜含量降至1000ug/g以下.本方法工艺简单,设备投资低,试剂用量少,经济效益高,是理想的甲基紫染料生产工艺改进方法.讨论了工业生产中的废料利用及治理环境污染等问题.对该方法已成功进行了工业放大实验.     

变分法在冲击应力波设计中的应用──冲击应力波设计理论研究（Ⅱ）

本文应用变分法原理，求解出以最小反射波能量为优化目标的冲击应力波极限函数，并就其边界条件、应力波形和能量传递效率进行了分析讨论，图２，参３。     

液压缸动态特性分析

本文主要以拉氏变换和控制工程为基础，从理论上分析了影响液压缸稳定工作的动态特性，探讨了液压缸动态特性的机理。     

波浪演示器的研究与设计

介绍了作者研制的波浪演示器.该演示器应用数字技术模拟水质点的运动,能形象演示海洋XOZ剖面上波浪的形成与传播.文中还讨论了RISC技术和非程序存储式体系结构在设计中的应用.