direction centre
2.The diffusion behavior of the gas in gas solid two phase flow was investigated in a cold circulating fluidized bed with section of 500mm 250mm and height of 3000mm. The mean diameter of silicon sand particles, which act as the bed material, was 100μm and CO2, which acts as tracer gas, was injected with the same direction as gas solid flow from the centre of the bed cross section.
5.This paper presents the designing of a high accuracy linear scannerused in laser beam scanning systems for automatic inspection of object size by means of a rectangular prism and correct selection of the rotation centre. The trasmitted laser beam scans in the direction precisely paralleled to outlet direction. For the prismatic glass with refraction index of about 1.9 and the measurement region up to 43.74mm, the maximum linear error is less than±20nm.
6.The probabilistic neural networks model (PNN) for water quality assessment was developed in this thesis. For avoiding error occour in identifying water quality class with Gaussian function, a parameter which reduce the error in calculating Euclidean distance of the model was added into the factor of approaching centre from negative direction, and PNN water quality assessment model was improved (RPNN).
7.The whole process just likes concentric circles with the cadres at the level of production team and brigade advocating the demand of Farming on His Own as the perpetual centre and with the development of the movement towards the direction of the Left deviation, the outer circle would broaden appropriately and include the cadres at the level of community and county into its scope step by step.
