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1·Objective To analyze the relationship between polymorphisms of EDNRB gene and Hubei provincial patients of Han ethnicity with sporadic Hirschsprung disease (sHD).

目的研究中国湖北汉族人群内皮素受体- B (EDNRB)基因的多态性与散发性先天性巨结肠症发病的关系。

2·SHD-A model transmitter is applied to emit and convey baseband signal of sound, vibration and measure-control in aeronautical communication system from one point to multi-point.

SHD - A型多通道固态调频发射机系统主要应用于航空通信系统一点对多点的声音、振动、测控等基带信号的发射与传输。