Objective Survey the frequency of H deficient phenotype in blood donor population and analyze the serological and genetic characteristics of these individuals.
目的调查献血者人群中H抗原缺失血型的表型频率，研究其血清学和遗传学特征。
Plasma chemical vapor deposition in silane radio frequency glow discharge is a main fabrication technology of hydrogenated amorphous silicon (a-Si: h) films.
射频辉光放电硅烷等离子体化学汽相沉积是制备氢化非晶硅薄膜的主要工艺技术。
The high frequency welding H-section steel has properties of broad and thin section component. Its higher axial lateral resistance capacity forms rigid frame.
高频焊接H型钢具有宽肢薄腹构件的特征，其强轴方向具较强的抗侧能力，形成刚性框架。
The insulation class F or class H . The insulation of open-loop U/f condition of . structure has the adaptability to high carrie frequency voltage supplied by frequency converter .
电动机的绝缘等级为F级或H级，绝缘结构具有对变频器输出高载波频率电压的适应能力。
The radio frequency coil system (34) includes N coil elements (38) which generate magnetic (H) and electric (E) fields.
所述射频线圈系统（34）包括生成磁场（H）和电场（E）的N个 线圈元件（38）。
Two lasers are continuously frequency-stabilized for over 100 h in conventional laboratory condition.
在普通实验室条件下，两台激光器同时保持频率锁定状态超过了100小时。
The simulation and experiment results show that, the matching of the deformed sever is much better than that of the H-plane and E-plane tapered wedge-shaped severs near the cut-off frequency.
计算结果与测试结果表明与H面渐变和E面渐变的楔形衰减器相比所设计衰减器在近截止频率处的匹配效果得到了明显的改善。
The principle of cascade H-bridge converter is analyzed. Variable-Frequency Carrier Bands PWM(VFCB-PWM) technique is discussed. Cascade H-bridge converter based on VFCB-PWM technique is proposed.
分析了级联H桥型变换器的工况，讨论了载波带频率变化的PWM（VFCB-PWM）技术，提出了基于VFCB-PWM技术的级联H桥型多电平变换器。
The principle of cascade H-bridge converter is analyzed. Variable-Frequency Carrier Bands PWM(VFCB-PWM) technique is discussed. Cascade H-bridge converter based on VFCB-PWM technique is proposed.
分析了级联H桥型变换器的工况，讨论了载波带频率变化的PWM（VFCB-PWM）技术，提出了基于VFCB-PWM技术的级联H桥型多电平变换器。
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