No abstract

In electric power system reform environment, grid companies have to estimate the economic performance of power grid construction project completed with a more market-oriented perspective. Therefore, economic efficiency post-appraisal model of the power grid is proposed in this paper. In view of the problem of evaluating of economic benefits only from financial angle in existing research, lack of comprehensiveness and depth, including construction costs, financial, social and economic benefits and environmental impact costs four aspects were build as the index system with network hierarchy. On this basis, the ANP method to solve the index weight was put forward, and hesitate linguistic evaluation method for policymakers, finally cloud model assembled each index evaluation result.In the end, three power grid construction projects in liaoning province had built were used for verifying the feasibility and rationality of the model.

The camera calibration in monocular vision represents the relationship between the pixels’ units which is obtained from a camera and the object in the real world. As an essential procedure, camera calibration calculates the three-dimensional geometric information from the captured two-dimensional images. Therefore, a modified camera calibration method based on polynomial regression is proposed to simplify. In this method, a parameter vector is obtained by pixel coordinates of obstacles and corresponding distance values using polynomial regression. The set of parameter’s vectors can measure the distance between the camera and the ground object in the field of vision under the camera’s posture and position. The experimental results show that the lowest accuracy of this focal length calibration method for measurement is 97.09%, and the average accuracy was 99.02%.

No abstract

No abstract