Supported by the National Natural Science Foundation of China(61301189);111 Project of China(B14010)
A phase-derived velocity measurement method is proposed in a wideband coherent system,based on a precise echo model considering the inner pulse Doppler effect caused by fast moving targets.The Cramer-Rao low band of v...
Supported by the International S&T Cooperation Program of China(2010DFB74280)
The influence of human body on dynamic characteristics of footbridge was analyzed. A re- alistic footbridge was measured during a mass event. A simulation experiment system including a simple beam as object and a shak...
Supported by State Key Laboratory of Engines(SKLE,200906);the National Natural Science Foundation of China(40805053)
A total of 14 in-use diesel buses were selected to conduct emission measurement using a portable emissions measurement system (PEMS) in Beijing. Their instantaneous gaseous emission rates, particular matter (PM) e...