A start-up delay circuit for an electronic ballast for instant-start type fluorescent lamps of the type having an electronic converter powered by an active electronic preregulator. The converter is an inductive- capacitive parallel-res... A Marques - US 被引量: 96发表: 1993年 Startup circuit...
Although visual inspection is useful to identify ballast damage on the surface, ballast damage under the sleepers, which is believed to be the most ... HF Lam,MT Wong,YB Yang - 《Engineering Structures》 被引量: 19发表: 2012年 Development of advanced CRT disassembly technology The results of...
About the ballast-sleeper interaction in the longitudinal and lateral directions In service, railway tracks must withstand transverse and longitudinal forces arising from running vehicles and thermal loads. The mechanical design adoptin... AD Iorio,M Grasso,F Penta,... - 《Proceedings of the Institu...
Ballast weights 50 aid retention. Each base has a bottom layer of compliant, e.g. semi-hard foamed, material. 展开 收藏 引用 批量引用 报错 分享 全部来源 求助全文 掌桥科研 相似文献The Saint Petersburg Flood Protection Barrier system: a review of operational experience The five-year period of...
The appliance is filled with sand, water or other ballast for use through a screw cap at one or both ends. <IMAGE> 收藏 引用 批量引用 报错 分享 全部来源 求助全文 掌桥科研 相似文献A unified view of polymer, dumbbell, and oligonucleotide DNA nearest-neighborthermodynamics A unified view of ...
A driving technique that can operate with electronic ballasts for fluorescent lamps to drive LEDs without requiring the replacing of any electronic ballast... C Nan,SH Chung - 《IEEE Transactions on Power Electronics》 被引量: 116发表: 2011年 HV9931 unity power factor LED lamp driver The HV9...
The new type ballast syste idea with submerged ballast pumps is described. The structure of submerged b... A Banaszek 被引量: 0发表: 2007年 Submerged centrifugal pump This invention relates to pumps for pumping corrosive liquids and more particularly to submerged centrifugal pumps having a gyro ...
摘要: PROBLEM TO BE SOLVED: To provide a technology for realizing a ballast water treatment apparatus requiring no large installation place, and a technology preventing adverse affect to the periphery environment when discharging ballast water.
Plans were drawn up this week to refloat the 2,838-TEU container ship APL Emerald, which ran aground in the eastern approaches of the Singapore Straits in the early hours of June 12. Singapore's Maritime and Port Authority reported that one of the ship's water ballast tanks and four fuel...
PURPOSE:To make the packing of ballast into the underside easier by a method in which a T-shaped cross section is made up of a rail-bearing plate in the horizontal direction and a reinforcing plate in the vertical direction. CONSTITUTION:A T-shaped cross section (over the whole length) of...