Combining the principle of the Principal Component Transform and various data processing methods, automatic detection of land using changing information can be implemented by different methods.
结合主成分变换原理和不同的数据处理过程，可以用不同的方式实现土地利用变化信息的自动发现。
This paper introduces a stable amplitude bipolar current source. It was designed basing on the principle of automatic control. This circuit is suitable for continuous casting slag detection.
本文介绍一种稳幅式双极性电流源，它是根据自动控制原理设计而成的，用于连续铸造熔渣的检测。
Have expounded the principle that the automatic detection system of automobile lamp geometry shape is designed, circuit structure and test result.
论述了汽车配光镜面形参自动检测系统设计的原理、电路结构及测试结果。
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