The cause of ear dying, the growth and development characteristics after freezing damage and the effectiveness of integrated control techniques in two wheat cultivars(Tr. aestivum L.
通过研究小麦受冻死穗的成因，冻后生长发育特性的变化和预防补救措施的效应。
Steering the beam direction is the main function of beam steering system of phased array radar, test the beam steering system and TR unit performance is signify during the development of the antenna.
相控阵雷达波束控制系统的主要功能是实现对天线扫描波束的控制，在天线阵面的研制过程中，需要对波控系统及TR单元性能进行测试。
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