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An Analysis on Development and Utilization Prospect of Longmen Geothe rmal Water;

龙门地下热水的开发与利用前景分析

Analyse Simply on Geological Environment of Tourist Area in Longmen of Luoyang City;

浅谈洛阳龙门旅游区的地质环境

The Lower Devonian is divided into the Pingyipu Formation and Ganxi Formation inLongmen of Tianquan County according to the lithological features.

天全龙门下泥盆统按岩性特征被分为平驿铺组和甘溪组，从甘溪组中识别出两个腕足化石带：Ｄｉｃｏｅｌｏｓｔｒｏｐｈｉａｐｕｎｃｔａｔａ延限带和Ｅｕｒｙｓｐｉｒｉｆｅｒ－Ｒｏｓｔｒｏｓｐｉｒｉｆｅｒ组合带。

Method of saving electricity and eliminating the noise while B2012 type planer low loading;

B2012型龙门刨床轻载运行时节电消噪方法

PLC Controlled AC Variable-Frequency Stepless Speed Control System for Planer;

用PLC控制龙门刨床交流变频无级调速系统

Development of the energy feedback device on the control system of gantry planer;

龙门刨床控制系统能量回馈装置的研制

The application of frequency conversion speed adjustment system and PLC in the gantry planer;

变频调速系统和PLC在龙门刨床上的应用

This paper introduces the characteristic of the AC speed regulation system of the large-scale gantry planer and realizes the fast-braking of the main transmission system with a feed-brake device.

介绍了PLC控制的大型龙门刨床交流变频无级调速系统的性能特点;采用能量回馈方法,实现了系统的快速制动,节省了能源;提出了龙门刨变频调速主传动最大切削功率及回馈能量的计算方法。

The Control System of Gantry Plane Based on PLC Control & DC Driving;

基于PLC和直流驱动的龙门刨控制系统

The system reconstructed traditional B2012A gantry plane electricity control by using PLC and electric power, electron current technology.

运用 PL C技术和电力电子变流技术 ,改造传统的 B2 0 12 A型龙门刨电控系统。