TUTORIAL: SETTING UP A LOW COST QRP (FT8, JT9, WSPR ETC) MONITORING STATION WITH AN RTL-SDR V3 AND RASPBERRY PI 3 QRP是无线电通讯简语中的小功率通讯的代词,像FT8,JT9,JT65和WSPR这些数字模式是被设计用来在全球范围内以低功率发射和接收的模式(虽然不是每个人都只用低功率).这些特殊设计的模式使得即使是微弱的信号也能被接收软件解码.2017年发布的FT8打败了JT9和JT6
As an emergency rescue team leader of a city, you are given a special map of your country. The map shows several scattered cities connected by some roads. Amount of rescue teams in each city and the length of each road between any pair of cities are
28w/m 54errors I stopped to let the car cool off and to study the map. I had expected to be near my objective by now, but everything still seemed alien to me. I was only five when my father had taken me abroad, and that we eighteen years ago. When my