Analysis of IC Card Water Control System Campus Usage

China is recognized worldwide as one of the 13 poorest countries in terms of water resources. According to statistics, at present, China's total freshwater resources are about 2.8 trillion cubic meters, ranking fourth in the world, but only 2,300 cubic meters per capita, which is only 1/4 of the world's average, ranking 121th in the world. After deducting the floodwaters that are difficult to use and the groundwater resources for walking in remote areas, the actual freshwater resources available in China are only around 1100 billion cubic meters, and the per capita use of water resources is about 900 cubic meters.

At present, the groundwater in most cities in China has been polluted to varying degrees and has been increasing year by year. In several major freshwater river basins, including the Huaihe River, the Yangtze River, the Songhua River, the Pearl River, the Yellow River, and most of the freshwater lakes, there are serious pollution situations.

More and more people realize that in response to the “water shortage”, we need to further improve the management of water resources and rely on market mechanisms to encourage people to save water.

At present, the awareness of schools in the management of water saving for students has been continuously improved, and universities and colleges are constantly improving and establishing water-saving management systems. However, there are many problems in the management of campus card application systems, which are mainly manifested in the following aspects:

1. Due to the rapid development of card applications, various units in the school have gradually established their own card application systems, resulting in many cards currently held by students.

2. The establishment of the campus network was relatively late and the management of the various units of the school was not uniform.

At present, the construction of campus networks of major universities is put into use, which provides a possibility for the establishment of a campus card system. The maturation of radio frequency IC card application systems has provided technical support for the establishment of campus card systems. The implementation of card management on campus has become a campus management. The inevitable trend of development.

The "Campus Card Information Management System" is designed for the management of universities and major secondary schools. It strives to overcome many of the problems mentioned above. The system integrates advanced radio frequency IC card technology and network communication technology to make "one card" and one. Card multi-use management can be achieved.

Water control system advantages:

(1) Users use water and scientific billing according to their needs, effectively saving valuable water resources and raising students' awareness of water conservation.

(2) More water is needed to pay more. Relatively speaking, the user's bathing time is reduced, the shower use turnover rate is increased, and the use area is considerably expanded with the bathroom.

(3)Accuracy of billing, effective guarantee of user's interests, and avoiding the use of one type of "big pot" (such as 2 yuan at a time and 1. 5 yuan at a time)

(4) Non-contact RF card swiping water control is convenient and reliable.

(5) to facilitate the management of the logistics department, first to purchase water after the water, simplify management, provide various forms of report output, and facilitate statistics and analysis.

(6) It can access any card network system and fully protect user resources.

Cobalt, elemental symbol Co, silvery white ferromagnetic metal, slightly silvery white on surface, 4th period in Periodic Table, Group VIII, atomic number 27, atomic weight 58.9332, hexagonal close packed, common valence of +2 , +3. Cobalt is a shiny steel gray metal, relatively hard and brittle, ferromagnetic, magnetic disappeared when heated to 1150 ℃. Cobalt has valences of +2 and +3. It does not interact with water at room temperature and is stable in humid air. Cooled to CoO when heated in air to above 300 ° C, and burned into Co3O4 when whitened. Hydrogen reduction method made of fine metallic cobalt powder in the air can spontaneous combustion of cobalt oxide. Cobalt is an important raw material for the production of heat-resistant alloys, hard alloys, anti-corrosion alloys, magnetic alloys and various cobalt salts.

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