A method for detecting sudden-up and sudden-down of voltage includes generating reference sine signal with the same phase and fixed amplitude as voltage signal of power supply, rectifying power supply voltage signal and reference sine signal then comparing rectified power supply voltage signal with .....
[更多]
The present invention relates to a method of treating wastewater such as landfill leachate inorganic and organic compounds. The treatment method involves the use of a core and a hydrophobic amine-containing polymer shell microspheres composed of a bipolar. Preparing said microspheres and structural .....
[更多]
一种掌纹识别方法，包括：分析来自手掌图像的区域，以利用该区域获得皮肤表面的纹理数据。将纹理数据与数据库中的参考信息进行比较，以确定对个体的识别。一种用于捕获手掌图像的设备，包括：外壳，其中具有窗口；以及设置在所述外壳中的图像传感器和光源，用于通过窗口来捕获图像。在表面上设置凸起。设置所述凸起，以使其位于适当放置在窗口上的手的已知相邻位置，以便捕获包括手的手掌区域的图像。
[更多]
