two-directional compression

By means of the mechanical method of two sets of closed system of force and elasticized closed sub-system of force, a test on enlarging tonnage capability of the high frequency tensile and compression fatigue testing machine has been evaluated.

本文利用二套封闭力系及子封闭力系弹性化的机械方法，在小吨位高频拉、压疲劳试验机上首次完成了超吨位试验的技术签定。

There are two failure modes of the thin film, one is the bifurcation and fracture under the tension load, and another is buckling and delamination under the compression.

薄膜的破坏形式有两种，一种是在拉伸状态下的分叉和断裂，另一种是在压缩载荷情况下的屈曲和脱粘。

The paper discusses how to use SVPN system ( using IPSec protocol) to transmit the two types of information separately, and how to divide the compressed data into key information and assistant information in some common compression arithmetics.

该文讨论了利用SVPN（以IPSec协议为例）分别对这两类信息进行传输的机制。同时还讨论了在几种常见压缩算法中关键信息和辅助信息的具体划分。

Analysis and calculation of thermodynamic cycle about two-stage compression refrigeration system

对配组式双级压缩制冷系统热力循环的计算与分析

This paper presents a dynamic model of air-cooled unit air conditioner during start-up/ shutdown processes, in which dynamic distributed parameter models of two-phase flow in heat exchangers are used, and steady state models are applied for the compression and throttling process.

建立了计算风冷小型空调器启动、停机过程的动态数学模型，其中压缩与节流过程采用稳态模型，而换热器则采用动态分布参数分相流模型。