Some energy based metrics, e. g. peak signal to noise ratio (PSNR), have some limitations while applied to vector map watermarking systems.
峰值信噪比(PSNR)等基于能量的度量指标在应用于矢量地图水印系统时具有一定的局限性。
Because e-bike has high-energy conversion rate, people can′t be hear the noise and exhaust, it is more reasonable and more environmental protection than other transports.
这是因为电动车的能源转换率高，没有噪音和尾气显然比其他的交通工具更合理，更环保。
Because e-bike has high-energy conversion rate, people can′t be hear the noise and exhaust, it is more reasonable and more environmental protection than other transports.
这是因为电动车的能源转换率高，没有噪音和尾气显然比其他的交通工具更合理，更环保。
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