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本文利用深度卷积神经网络技术,针对全天相机的云图分割方法进行了改进,将MobileNet作为三种分割模型U-Net、SegNet和DeepLabV3+的主干,再分别使用白天和夜间云图进行训练预测,利用一些评价指标对于其性能做出评价。结果表明,MobileNet可以更好的提取网络特征信息,经过改良后的U-Net网络更适合于地基云图的分割,对于白天云图和夜间云图的分割精确度分别达到了89%和95%。 相似文献
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为了进一步推动《中华人民共和国水法》的贯彻实施,依法合理开发利用和保护水资源,山东省人大常委会主任会议决定对省内贯彻实施《水法》的情况进行一次调查。调查组由省人大常委储建华、赵永贵、陈世宾、周敬尊、房毅民等13人组成。分别对淄博、潍坊、烟台、泰安、济宁、枣庄、济南七市的21个县的12座大中型水库、40处河道、湖泊、灌 相似文献
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The typical light emission efficiency behaviors of InGaN/GaN multi-quantum well (MQW) blue light- emitting diodes (LEDs) grown on c-plane sapphire substrates are characterized by pulsed current operation mode in the temperature range 40 to 300 K. At temperatures lower than 80 K, the emission efficiency of the LEDs decreases approximately as an inverse square root relationship with drive current. We use an electron leakage model to explain such efficiency droop behavior; that is, the excess electron leakage into the p-side of the LEDs under high forward bias will significantly reduce the injection possibility of holes into the active layer, which in turn leads to a rapid reduction in the radiative recombination efficiency in the MQWs. Combining the electron leakage model and the quasi-neutrality principle in the p-type region, we can readily derive the inverse square root dependent function between the light emission efficiency and the drive current. It appears that the excess electron leakage into the p-type side of the LEDs is primarily responsible for the low-temperature efficiency droop behavior. 相似文献
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