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浅谈灌浆及钻孔护壁浆液性能及试验方法 被引量:1
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作者 李亚宁 陆威 《四川水力发电》 2013年第6期64-67,共4页
介绍了在桐子林水电站的试验经验,总结出一些方法及试验数据,供同行参考。
关键词 灌浆浆液 钻孔护壁浆液 试验方法 性能成果 桐子林水电站
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Multiple phase detector of M-ary phase shift keying symbols in code division multiple access systems 被引量:1
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作者 QUAN Zhi 《Journal of Central South University》 SCIE EI CAS 2011年第4期1080-1086,共7页
A novel iterative technique, the phase descent search detection was proposed. This technique constrained the solution (PDS) algorithm, for M-ary phase shift keying (M-PSK) symbols to have a unit magnitude and it w... A novel iterative technique, the phase descent search detection was proposed. This technique constrained the solution (PDS) algorithm, for M-ary phase shift keying (M-PSK) symbols to have a unit magnitude and it was based on coordinate descent iterations where coordinates were the unknown symbol phases. The PDS algorithm, together with a descent local search (also implemented as a version of the PDS algorithm), was used multiple times with different initializations in a proposed multiple phase detector; the solution with the minimum cost was then chosen as the final solution. The simulation results show that for highly loaded multiuser scenarios, the proposed technique has a detection performance that is close to the single-user bound. The results also show that the multiple phase detector allows detection in highly overloaded scenarios and it exhibits near-far resistance. In particular, the detector has a performance that is significantly better, and complexity that is significantly lower, than that of the detector based on semi-definite relaxation. 展开更多
关键词 coordinate descent COMPLEXITY M-ary phase shift keying (M-PSK) multiuser detection quadratic optimization semi-definite relaxation
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Recent studies on mechanical properties of recycled aggregate concrete in China-A review 被引量:35
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作者 XIAO JianZhuang LI WenGui POON ChiSun 《Science China(Technological Sciences)》 SCIE EI CAS 2012年第6期1463-1480,共18页
Numerous experimental and theoretical studies on recycled aggregate concrete have been carried out in China in the past 10 years.This paper provides a comprehensive review of the related findings of research on the me... Numerous experimental and theoretical studies on recycled aggregate concrete have been carried out in China in the past 10 years.This paper provides a comprehensive review of the related findings of research on the mechanical properties of RAC in China.The influences of the RCA on the strength and deformation characteristics of concrete,the statistical characteristics for the strength of RAC,fracture energy,stress-strain relationships under uniaxial compression,uniaxial tension as well as pure shear,and the residual strength of RAC after exposure to high temperatures,the bond between RAC and different kinds of steel rebar were also reviewed.Furthermore,some recent studies on the numerical simulation of the failure mechanism for RAC at the meso-structure level were discussed. 展开更多
关键词 construction and demolition (C&D) wastes recycled coarse aggregate (RCA) recycled aggregate concrete (RAC) me-chanical property test numerical simulation
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