摘要：传统的试题库系统缺乏质量控制机制,使得随着时间推移,题库逐渐不适用.设计一个闭环自适应的试题库系统体系,使试题库具有质量控制机制,可使试题库系统自我完善,长效适用.

摘要：对四冲程柴油机 (4 - 85)排气噪声的机理和特性进行了研究 ;利用转速传感器的转速信号控制高速信号处理芯片 TMS32 0 C2 5合成次级声源的声波 ,通过自适应控制可以实现宽带消声。对柴油机的间歇性排气噪声进行了有源消声的初步设计。

摘要：A wearable body area sensor network(WBASN) was designed and implemented to monitor movement information of stroke patients in real time. The sensor system was combined with a previously developed distributed functional electrical stimulation(d FES) system, which is a promising technology for motor rehabilitation of stroke patients. Movement information could be useful in outcome assessment of rehabilitation, or for closed-loop adaptive stimulation during rehabilitation. In addition,a short-latency, low-power communication protocol was developed to meet the clinical requirements of energy efficiency and high rate of data feed-through. The prototype of the WBASN was tested in preliminary human experiments. Experimental results demonstrate the feasibility of the proposed wearable body area sensor network in monitoring arm movements on healthy subjects.