To observe the clinical trends of rheumatic fever and rheumatic valvular disease of heart ( VDH), the clinical date including incidence, features, treatment, prevention and recurrence were analyzed in 85 children with rheumatic fever and rheumatic VDH which were diagnosed during 1990 years.

On the center of vacuum drying equipment with hot air, VDH, the structure, main technical specification, drying mechanism of the equipment and the customer value are emphatically described in the paper.

本文以VDH型真空热风干燥设备为核心。着重论述了该设备的结构特点、主要技术性能、干燥机理以及用户评价。

Vacuum-hot air drier ( abbreviated as VDH) is one of the modern technique used in the line of electrical engineering.

真空热风干燥简称VDH，它是应用于电工行业中的一种新兴工艺技术。

New Development of Vacuum Drying Equipment with Hot Air, VDH

真空热风干燥设备（VDH）的新进展

Development and Application of Electric Precipitator with Large Pole Spacing and High Voltage The Long Spacing VDL

大极距、高电压电除尘器的研制与应用

Effect of low density Cementing on evaluating Cementing Quality with CBL/ VDL

低密度水泥对CBL/VDL评价固井质量影响

To solve these problems, this paper designs a vulnerability description language ( VDL).

为了解决这些问题，文章设计了一种安全脆弱点描述语言。

A Method for Thin Layers Cement Bond Evaluation with CBL/ VDL Data

用CBL/VDL资料评价薄层水泥胶结

It demonstrates that the system described by VDP equation can produce steady periodicity movement from any initial condition under nonlinear energy supply.

演示VDP方程所描述的系统在非线性能源供给下，从任意初始条件出发都能产生稳定的周期性运动。

Vertical Density Profile ( VDP) is an important structural characteristic of wood composites and has strong affect on panel properties.

剖面密度分布是木质人造板重要的结构特征，也是影响其物理力学性能的重要因素之一。

A New Technology of Vaporized Deposit Process ( VDP) forthe Coating of Soft Ferrite Cores

用于软磁铁氧体磁芯的气相沉积表面处理新工艺

Vertical Density Profile ( VDP) is one of the major factors affecting fiber board properties.

剖面密度分布（VDP）是影响纤维板物理力学性能的重要因素之一。

In the condition of two types of acceleration induced by the nuclear explosion, the isolation properties of double mass spring system are studied by the Runge Kutta method based on vibration dose value ( VDV) criterion.

根据振动剂量值（VDV）隔震标准，采用Runge-Kutta法研究了双层线性隔震系统在核爆炸产生的两类冲击震动作用下的隔震性能。

The experiment showed that VDV was more sensitive to impulsive vibration, especially to those whose crest factors were more than 6, and possessed a larger changing range.

实验表明，振动剂量值比振动加速度均方根值具有较大的变化范围，振动剂量值对脉冲型振动特别是具有较高峰值因素的振动反应更灵敏。

Mathematically, the magnitude of VDV depends on the nature of vibrational signals and other factors.

VDV的幅值主要取决于振动信号的性质。ISO2631/1不适用峰值因素高于6的振动，并且，VDV不像加速度均方根值那样具有明确的物理意义。

Recently, a concept of vibration dose value ( VDV) was suggested to evaluate human vibration.

近几年耒，为了更好地描述人体对振动的响应，有人建议用振动剂量值（VDV）未评价人体振动。

The results in the study and experiments about VDW indicate that it has stable dynamic performance and powerful dissipation energy capability;

实验表明，粘滞阻尼墙具有稳定的动力性能和很强的耗能能力；

Viscous Damping Wall ( VDW) is a new type of device for structural vibration energy dissipation.

粘滞阻尼墙是一种新型减振消能元件。

A Modified vdW Equation of State for Strong Polar Fluids

一种修正的vdW状态方程在强极性流体中的应用

Thirdly, modern control theory is introduced in the analysis of structures with VDW.

在理论分析方面，将现代控制理论方法引入到设置粘滞阻尼墙结构的减振控制中；

VDW model is made with the developed viscous damping material.

本文利用研制的粘滞阻尼材料制作了粘滞阻尼墙（模型），进行了粘滞阻尼墙的动力性能试验。