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Technical feasibility study of an onshore ballast water treatment system

Shengjie LIU, Manxia ZHANG, Xiang LI, Xiaojia TANG, Lingling ZHANG, Yimin ZHU, Chengyu YUAN

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 4, Pages 610-614 doi: 10.1007/s11783-011-0379-2

Abstract: To fulfill the requirements of (G8), a set of onshore ballast water treatment equipment utilizing micro-pore

Keywords： ballast water ceramic filter UV plankton oceanic bacteria

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Image-Aided Analysis of Ballast Particle Movement Along a High-Speed Railway Article

Xuecheng Bian, Wenqing Cai, Zheng Luo, Chuang Zhao, Yunmin Chen

Engineering 2023, Volume 27, Issue 8, Pages 161-177 doi: 10.1016/j.eng.2022.08.006

Abstract:

As a core infrastructure of high-speed railways, ballast layers constituted by graded crushed stonesNearly 1274 surface ballast particles were manually dyed by discernible colors to serve as tracers inThe movements of the surface ballast particles were tracked using the varied pixels displaying tracersThe movement behavior of ballast particles under different combinations of train speeds and axle loadsAdditionally, the development of ballast particle displacement statistically resembled its rotation.

Keywords： High-speed railway Full-scale model test Image-aided technique Ballast particle movement Track vibration

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Flexible resonant tank for a combined converter to achieve an HPS and LED compatible driver

Jin HU,Hui-pin LIN,Zheng-yu LU,Feng-wu ZHOU

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 8, Pages 679-693 doi: 10.1631/FITEE.1500054

Abstract: High pressure sodium (HPS) lamp has been widely used in street lighting applications because of its maturity, reliability, high lighting efficiency, long life-time, and low cost. Light emitting diode (LED) is expected as the next generation lighting source due to its continuously improving luminous efficacy, better color characteristic, and super long life-time. The two lighting sources may coexist in street lighting applications for a long time. A novel HPS and LED compatible driver is proposed which is rather suitable and flexible for driving HPS and LED in street lighting applications. The proposed driver combines the LLC and LCC resonant circuits into a flexible resonant tank. The flexible resonant tank may change to LLC or isolated LCC circuit according to the lighting source. It inherits the traditional HPS and LED drivers’ zero voltage switching (ZVS) characteristics and dimmable function. The design of the proposed flexible resonant tank considers the requirements of both HPS and LED. The experiments of driving HPS and LED on a prototype driver show that the driver can drive the two lighting sources flexibly with high efficiency.

Keywords： High pressure sodium (HPS) Light emitting diode (LED) Compatible driver Ballast