磁通密度

The theoretical analysis and simulation results of 1kW 40~60VDC/380VDC full-bridge Boost mode two-input DC-DC converter have shown that the converter has the advantages such as double isolation among multiple input sources and between output and input of the converter, simple topology, strong voltage matching ability, multiple input sources can supply the power simultaneously or individually, small input current ripple, high power density, high conversion efficiency, high reliability at short circuit, magnetic flux of high-frequency transformer easy to add up etc.

1kW 40～60VDC/380VDC全桥Boost型双输入直流变换器的理论分析和仿真结果表明，这种变换器具有多路输入源之间以及输出与输入源之间双隔离、电路拓扑简洁、电压匹配能力强、多路输入源可同时或分时供电、输入电流纹波小、功率密度高、变换效率高、负载短路时可靠性高、高频变压器磁通易于叠加等优点。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。