A new passive localization technology of DF on satellite is given, which only requires one-dimension DF equipment. It's based on DOA information of the target in the different time.
本文介绍了一种新的星载无源定位方法，即利用自旋卫星的高速旋转特性，用一维长基线干涉仪测向就可完成对地球表面地磁辐射源的近实时高精度定位。
Unlike a passive solar home, an active solar home uses mechanical equipment, such as pumps and blowers, and an outside source df energy to help heat the house when solar energy is not enough.
与消极供暖房屋不同的是，积极供暖房屋使用机械设备，比如泵、风箱，以及外部的能量源，以保证太阳能不足时也可以给房屋供暖。
The information of the modification of the electric system and the brake equipment of DF 4 locomotive, and their operation, were provided.
文中介绍了机车电气系统和制动系统的改造以及操作应用情况。
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