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This paper presents a design of 3D printer with constant temperature and fan control system. To print 3D models, the temperature of environment will be risen with long time. Controlling the temperature of the environment is important. The purpose of this research is to make the 3D printer in temperature-controlled environment. The systems are been controlled by FPGA. User can set the range of temperatures...
Moisture content in transformer oil is an important index for equipment condition. Based on technical requirement of on-line monitoring of moisture content, this paper presents a water solubility estimation method using least square technique. Water distribution and solubility in oil is analyzed, and the Karl-Fischer method is adopted to determine moisture content in one oil sample; then, temperature...
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