This paper discusses the founding of mathematical model of centrifugal probability ballast cleaner, and combining with the model, introduces the mixed discrete optimal design method, and hence offers a practical reliable optimal method for centrifugal probability ballast cleaner.

The Optimal Design of Cleaning Screen of the Hydraulic Ballast Cleaner

全液压枕底清筛机筛分机构的优化设计

Valve remote control system can control the hydromantic driving unit, valves, gather data from cursors. It can also control cargo pump and ballast pump.

阀门遥控系统采集阀门以及传感器数据，控制液压动力单元、液压阀门，对液货泵及压载泵等进行控制。

Ballast pump status-indicating system

压载泵状态指示系统

In this paper, method of calculation for pumping of water vapour with gas ballast pump is introduced.

本文介绍用气镇泵抽除水蒸汽的计算方法。

In the paper, model of ballast pump is established according to the principle of centrifugal pump.

本文根据离心泵的原理建立了压载泵流量模型；

Calculation of Parameters for Gas Ballast Pump

气镇泵的参数计算

Cargo and ballast pump speed control system

货油及压载泵转速控制系统

Function test and automatic controller test for ballast pump.

压载泵效用试验和自动控制装置试验。

Disclosed is an electronic ballast for fluorescent lamp.

荧光灯电子镇流器。

Discussion on the Standard about Power-loss of Magnetic Ballast for Fluorescent Lamp

管形荧光灯电感镇流器的能耗标准探讨

Single-Chip Electronic Ballast for Fluorescence Lamp

用于荧光灯的一种单片电子镇流器

High Power Factor Dimmable Electronic Ballast for Fluorescent Lamp

高功率因数可调光荧光灯电子镇流器

A Design of High Power Dimmable Electrical Ballast for Ultraviolet Lamp

一种大功率可调光紫外灯电子镇流器的设计

Research on digital control strategy of electronic ballast for MH lamp

数字控制金卤灯电子镇流器

The Design of the Electric Circuit of an Electronic Ballast Fluorescent Lamp

一种电子镇流器荧光灯的电路设计

But in fact, due to the great variation of ballast resistance during track work and change of "stress free temperature" of the rail, they are hard to measure then hard to control.

但道床阻力在作业时变化很大，钢轨在线路上长期使用，锁定轨温可能发生变化，温度力亦不易控制。

By many years experiences, controlling ballast resistance and excessive compressive temperature force of the rail is recognized as the only means to overcome the track buckling.

多年来认为控制道床阻力及钢轨内的温度力是防止胀轨跑道的主要办法。

Spring elements to simulate the lateral and longitudinal ballast resistance s, taking into account the nonlinear peculiarity of the ballast resistance.

弹簧单元模拟道床的横向、纵向阻力，并考虑了道床阻力的非线性特性。

The Effects of Train Braking and Ballast Resistance on the Longitudinal Force in Rail

列车制动与道床阻力对钢轨纵向力的影响分析

Study on Testing Method for Ballast Resistance of UM-71 Jointless Track Circuit

无绝缘轨道电路道碴电阻测试方法的研究