Abstract. The principles on jamming the recording device using the mobile communication GSM signals are analyzed. An idea is proposed to interfere the recording device through microwave radiation. The operating principles and defects of the recording device are discussed. The curve describing the variation in sound level readings with radiation parameters is quantitatively measured. Experiments are performed using the designed prototype. Results demonstrate the ability of the prototype to effectively suppress the normally recorded waveform.

The location of the transformer is an important part of the power transmission and transformation project. This paper first summarizes and summarizes the predecessors’ rules for transformer location, and draws the following six rules: close to the load center, making the regional power grid layout reasonable, high and low pressure side access lines convenient, station area topography, station area geological. And the application of screening 1451 original poi data to obtain 368 poi data in accordance with the rules of 3 and above, and then introduce the ap clustering model, and apply the data to 9 ap clustering models by setting different parameters. In the optimal result, six clustering points are given, and the scores of the six locations are calculated and normalized to obtain the ranking of the transformers. The first one is the textile street.