According to reports, graduate students created a prototype drone at the Delft University of Technology in the Netherlands. The drone can automatically navigate to a location in a matter of minutes. A device can help people restore normal heart rhythms. Alec, a product engineering student, created a drone in university industrial design engineering. It has three rotors and a car defibrillator.
The UAV is mainly a mobile version of the Automatic External Defibrillator (AED). This version is a portable electric device that is often found in shopping malls, light shopping centers, traffic stations, and conference centers. The prototype of the drone also has a camera, which allows the patient and emergency personnel to communicate and follow instructions for how to care for the patient.
The 4 kg drone has a carbon fiber frame and a 3d-printed microstructure. It can navigate through the GPS and find a location using the caller's cell phone signal. It can fly 100 kilometers an hour and can carry another 4 kilogram load. The main advantage of the prototype is that it can save lives by flying over the road.
Water treatment agent is a general term for a type of chemical agent used for water treatment, which is widely used in petroleum, chemical industry, metallurgy, transportation, light industry, textile and other industrial sectors. Water treatment agents include corrosion inhibitors, scale inhibitors, fungicides, flocculants, purifying agents, cleaning agents, pre-film agents, etc. In practical applications, water treatment agents with compound formulas are often used, or various types of water treatment agents are used in combination. Therefore, it is necessary to pay attention to the antagonistic effect between the components due to improper compounding, so that the effect is reduced or lost, but also to make full use of the synergistic effect (the synergistic effect produced when several agents coexist) to increase efficiency. In addition, most water treatment systems are open systems, there will be a certain amount of discharge, the use of various types of water treatment agents to consider the impact of the environment.
Common water treatment agents are: 1) flocculants, ferrous sulfate heptamidate, polymeric iron salts, calcium hydroxide, ferric chloride hexahydrate; 2) disinfectant or algaecides, calcium hypochlorite, trichloroisocyanuric acid (TCCA), chlorine dioxide; 3) scale inhibitors, polyacrylamide (cationic, anionic, nonionic), polyaluminum chloride, polyaluminum chloride, ferrous sulfate, etc.
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