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A novel polysaccharide (PCPP‐1A) from Poria cocos peels was prepared and its structural characterization and biological activities were investigated in vitro. The optimized extraction conditions of PCPP that obtained by response surface methodology were liquid to solid ratio 24.19 ml/g, extraction time 5.54 h, and extraction temperature 100°C, with the highest yield of 0.71%. Moreover, the crude...
A real-time remote data acquisition and process monitor system based on ARM and Ethernet is designed for automatic filling line. The whole scheme of the system is analyzed and the hardware and software design of the system is discussed in details. Though obtaining intuitive image video information and analyzing the real-time display data or history date which come from the production line, people...
Considering the high precision and small load of the 3D printer motion control system, this paper proposed a method of multi-dimensional stepper motor coordinated control. The overall design of the control system is given; based on Bresenham algorithm, the Bresenham algorithm is extended from two-dimensional to multidimensional, realizing cooperative movement of the multidimensional stepper motor;...
Stability and reliability are the essential properties for the control system of the no stroboscopic medical shadowless lamp. This paper designs an intelligent control system based on STM32F103 for medical shadowless lamp. PWM (Pulse Width Modulation) control technique is utilized to realize the no stroboscopic work and rapid multistep regulation. By detecting the working condition of shadowless lamp...
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