In order to solve the problem that the system structureis complex. the positioning accuracy is not high, and the algorithm is difficult to implement in the current visible light Indoor positioning.a multi-point calibr...
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ISBN:
(纸本)9781728101200
In order to solve the problem that the system structureis complex. the positioning accuracy is not high, and the algorithm is difficult to implement in the current visible light Indoor positioning.a multi-point calibration linearapproximation-positioning algorithm is proposed according to the relationship between illuminance and distance in this ***, a plane rectangular coordinate system is established in the positioning target plane and the positioning target plane is divided into multiple ***, according to the difference between the quantized values of the adjacent sensors at different points in the target plane, the relative positioning of the sensors is achieved,then according to the difference between the illumination quantized value at the target position and the positioning center point and the system positioning sensitivity to determine the coordinates of the positioning target *** the precise positioning is *** results show that in the spatial region of 0.8m * 0.8m * 0.8m, 5cm positioning error can be *** the actual test,the sensor can correctly distinguish the area and coordinates,and the error is controled within *** simulation and experimental verification results show that the positioning algorithm can achieve centimeter-level positioning. improve indoor positioning accuracy effectively, and the algorithm is simple and easy to implement.
This paper focuses on the improvement of the concentration and productivity of 1,3-propanediol from continuous fermentation of glycerol by Klebsiella pneumoniae.A nonlinear steady-state optimization model is presented...
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This paper focuses on the improvement of the concentration and productivity of 1,3-propanediol from continuous fermentation of glycerol by Klebsiella pneumoniae.A nonlinear steady-state optimization model is presented according to engineering background.A new linear approximating method has been developed in view of the feature of the optimization model. Computer simulation is used for this paper,and the numerical simulation is in accordance with experimental *** numerical results illustrate the validity and efficiency of the *** results presented in this work can be used as guidelines for choosing proper operating parameters to get higher concentration or productivity.
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