sensor

Cave, is a place full of mystery. I don't know if it is the natural creation that gives them endless magic, or humans have always liked to explore.In short, caves have always firmly attracted the curious eyes of humans. Today we will explore the magical world of karst caves and see how it is formed.   1. How are karst caves formed? Karst caves are the underground world of karst landforms, formed by the transport of water, dissolution, erosion and gravitational collapse of soluble rocks (mainly carbonate rocks).   Initially, the space for water transport is the original pore space, very narrow, the water flow is mainly laminar, and the dissolution is very slow .   W hen the pore space develops into a hole, the water flow is slightly faster, the dissolution is enhanced, and a narrow network of holes is formed.Later, influenced by geological factors, the water flow chooses the best path to expand to form a cave.   Caves can be short, single underground spaces or network...

The increasing scarcity of water resources has become a global problem. Saving water and achieving efficient water use are the needs of human survival and development, as well as the needs of the global economy and society. Agricultural water consumption accounts for 70% of the total water consumption in China, and the problem of inefficient agricultural irrigation and wasteful water consumption is widespread. Developing water-saving agriculture and improving the efficiency of agricultural water use is an important part of China's water-saving strategy. Agricultural automatic irrigation system consists of automatic control technology and sensor technology, communication technology, computer technology equal to an integrated irrigation management system. The system is mainly designed for daily irrigation control and management in the fields of farmland, gardening, and facility agriculture, and through modern scientific and technological means to reduce labor costs, improve the effic...