To further improve the luminous efficiency of LED lightings,this Letter proposes a chip-on-board（COB）device by combining diced staggered V-shaped patterns and remote phosphors.The results show that the V-shaped patt...To further improve the luminous efficiency of LED lightings,this Letter proposes a chip-on-board（COB）device by combining diced staggered V-shaped patterns and remote phosphors.The results show that the V-shaped patterned COB（V-COB）with vertex angles from 120o to 150o can achieve a～17%output power increase（OPI）compared to the conventional COB.V-COB remote phosphor devices（RPDs）are then manufactured and tested.The luminous efficiency of the proposed RPD represents an 11.6%increase at the correlated color temperature of～3000 K.Such an improvement can be attributed to both the decreases of total internal reflections and phosphor backscatterings.展开更多
A fast physics analysis framework has been developed based on SNi PER to process the increasingly large data sample collected by BESⅢ.In this framework,a reconstructed event data model with Smart Ref is designed to i...A fast physics analysis framework has been developed based on SNi PER to process the increasingly large data sample collected by BESⅢ.In this framework,a reconstructed event data model with Smart Ref is designed to improve the speed of Input/Output operations,and necessary physics analysis tools are migrated from BOSS to SNi PER.A real physics analysis e~＋e^-→ π~＋π^-J/ψ is used to test the new framework,and achieves a factor of10.3 improvement in Input/Output speed compared to BOSS.Further tests show that the improvement is mainly attributed to the new reconstructed event data model and the lazy-loading functionality provided by Smart Ref.展开更多
基金supported by the National Natural Science Foundation of China(Nos.U1401249 and51375177)the Postdoctoral Science Foundation of China(Nos.2015T80904 and 2014M560659)the Fundamental Research Funds for the Central Universities
文摘To further improve the luminous efficiency of LED lightings,this Letter proposes a chip-on-board（COB）device by combining diced staggered V-shaped patterns and remote phosphors.The results show that the V-shaped patterned COB（V-COB）with vertex angles from 120o to 150o can achieve a～17%output power increase（OPI）compared to the conventional COB.V-COB remote phosphor devices（RPDs）are then manufactured and tested.The luminous efficiency of the proposed RPD represents an 11.6%increase at the correlated color temperature of～3000 K.Such an improvement can be attributed to both the decreases of total internal reflections and phosphor backscatterings.
基金Supported by Joint Large-Scale Scientific Facility Funds of the NSFC and CAS(U1532258)Program for New Century Excellent Talents in University(NCET-13-0342)+1 种基金Shandong Natural Science Funds for Distinguished Young Scholar(JQ201402)National Key Basic Research Program of China under Contract(2015CB856700)
文摘A fast physics analysis framework has been developed based on SNi PER to process the increasingly large data sample collected by BESⅢ.In this framework,a reconstructed event data model with Smart Ref is designed to improve the speed of Input/Output operations,and necessary physics analysis tools are migrated from BOSS to SNi PER.A real physics analysis e~＋e^-→ π~＋π^-J/ψ is used to test the new framework,and achieves a factor of10.3 improvement in Input/Output speed compared to BOSS.Further tests show that the improvement is mainly attributed to the new reconstructed event data model and the lazy-loading functionality provided by Smart Ref.
