In recent years, with the development of modern computer technology, electronic technology, laser technology, biological technology, and material technology, sports measurement technology has been greatly improved. Sports test equipment is one of the basic means to obtain athletic body parameters in the field of sports research. The object of sports instrument research is the human body in the course of exercise, and conducts research on how to accurately collect various parameters of the human body, such as blood pressure, respiration, pulse, human motion speed, acceleration, and inertial parameters of the human body.
China's sports test equipment has experienced decades of development. It has now become an important part of China's sports research. With incomplete statistics, in the past 20 years, the discipline of sports instruments has produced nearly a thousand research results for China's sports undertakings. It has won more than 100 state-level and provincial-level scientific and technological progress awards and has been used to promote the development of sports science and technology in China. Great effect.
However, we are also soberly aware that compared with the developed countries in the world, there are still large gaps in the accuracy, design, integration, and intelligence of the instrument in China. A large number of high, sophisticated, and sharp test instruments still rely on imports. The existence of these problems should arouse our concern.
In addition, China's sports test equipment and other disciplines are also facing fierce competition and challenges, especially with China's accession to the World Trade Organization, the impact of various imported instruments on China's test equipment, the aging of the research team and the lack of research funding Problems such as these are seriously hindering academic development.
Chlorine is the most common disinfectant used in swimming pools and hot springs. Its main function is to disinfect and oxidize contaminants in the water, thus providing protection for swimmers.
Chlorine that is active and capable of oxidizing pollutants in water is called free chlorine.
Chlorine that has reacted with contaminants and exhausted its ability to disinfect is called compound chlorine.
Total chlorine is the sum of residual free chlorine and combined chlorine.
Free chlorine residues in pools should be between 1 and 3 PPM and in hot springs between 3 and 5 PPM.
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