边际产业规模波动递增原理及其对非国有经济走势的浅析

为了探讨各产业相互之间的发展和承继关系，根据产业发展的历史及其规模扩张的规律，提出了“边际产业规模波动递增原理”，其中从需求的角度把产品划分为“金字塔产品”和“非金字塔产品”，并给出了产业的需求发展曲线ＩＤＤＣ。最后，本文运用该原理对非国有经济的走势进行了浅析。     

高带宽的网络数字通信电缆

本文介绍了网络综合布线系统用数字通信电缆的发展趋势，阐述了在国外已被广泛商用的6类．7类布线的结构特点．工序控制要求及其传输性能，并指出了这两种高带宽的数字电缆良好的市场前景。     

自制氢化物发生器原子吸收光谱法测定微量样品中Bi的含量

氢化物原子吸收光谱法能对多种元素进行痕量级的测定，但存在着不足之处，为此，我们设计并自制了简易的氢化物发生器，制做简单，操作方便，消耗样品少，而精密度灵敏度，检出限等指标均能满足测定要求。     

表面弹性项K13对液晶盒临界场强的影响和实验测定

以修正后的Rapini-Papoular公式为基础，得到了有表面弹性能K₁₃存在时，弱锚定向列液晶盒指向矢满足的方程和边界条件。用解析推导和数值计算的方法，详细研究了K₁₃对阈值场强和饱和场强的影响。在理论上给出了检验K₁₃是否存在的一种新方法及用沿面平行校列的弱锚定楔型液晶盒测定K₁₃值的实验方案，并通过数值实验证实了本文所给方法的可行性。     

Numerical Simulation of Droplets Impacting on a Liquid Film with a Vapor Bubble Growing

A numerical model of multiphase flow is developed to investigate the relative contributions of droplet parameters to spray cooling heat transfer. The 2-D model takes into account the effects of surface tension, gravity and viscosity. The heat and mass exchanges of free surface are defined to study vapor bubble behavior in liquid films. The multiphase flow and heat transfer are discussed for the three droplet parameters： initial droplet position, initial droplet temperature, and droplet impact frequency. The heat transfer mechanisms of the three cases are discussed in detail.     

二元序列通过线性反馈移位寄存器后的码组频率分布特性

我们知道,二元序列有各种性质,对它有各种各样的检验方法。这里介绍的是二元序列通过线性反馈移位寄存器以后的码组频率分布的若干特性。为了便以了解这些特性,我们首先介绍一下全排列统计、频率分布和二元序列本身码组频率分布的一些概念。 1.二元序列的码组频率分布特性熟知,在英语中26个基本字母出现的机会并不均等,显然这是一种概率分布问题。这种分布通常是对字母在英语中出现的频数(也称频率)的大量统计得到的,所以习惯上把这种概率分布称作频率分     

高亮度绿色薄膜EL器件

长期以来对平板显示用的薄膜EL器件的发展付出了好大力量。在许多方法中,两面绝缘ZnS:Mn薄膜是有希望的EL器件。     

A Novel Kinetic Model of Liquid Nitrogen＇s Explosive Boiling at the Initial Stage

The liquid nitrogen＇s explosive boiling characteristics under transient high heat flux have attracted increasing attentions of researchers over the world due to its wide applications. Although some experiments have been performed, the process and the characteristics at the initial stage, especially within 1 ~s, have not been described reasonably yet. Based on the related experiments and theoretical analysis, a novel kinetic model combined with quasi-fluid idea is presented to analyse the characteristics of liquid nitrogen＇s explosive boiling at the initial stage. The results indicate that the model can appropriately describe the liquid nitrogen＇s explosive boiling. The behaviour and the heat transfer characteristics of a single bubble are very different from those of the bubble cluster, thus the behaviour of individual bubbles could not be directly applied to describe the explosive boiling process at the initial stage.