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Sentence similarity compute is an important part in question answering system based on frequency asking questions. The accuracy of the existing sentence similarity algorithm needs to be improved, so this paper presents a revised question similarity compute method. We combine the word order feature with vector space model algorithm. When we use the VSM to compute the question similarity, we propose...
Many of the recent algorithms have been developed to improve the various aspects of collaborative filtering recommender systems, however, most of them do not take the sectional data of users and items information or characteristic into account. This paper, we present a new improved collaborative filtering based on item similarity modified and item common ratings which take full advantage of the sectional...
In order to provide accuracy referential attitude of remote sensing satellite for images processing, all measurements obtained by the attitude determination system are processed offline periodically to fusion temporal information effectively. RTS (Rauch-Tung-Striebel) optimal fixed-interval smoothing algorithm based on UKF (Unscented Kalman Filter) forward filter was employed for data post-processing...
In this paper, Rauch-Tung-Striebel(RTS) optimal smoothing algorithm is applied to improving off-line satellite attitude determination accuracy. The measurements are first processed by the forward filter, and then, a separate backward smoothing pass is used for obtaining the smoothing solution. The performances between RTS and extended Kalman filter(EKF) in gyro/star-sensor integrated system are compared...
This paper proposes to develop an angle measurement system of the orientation sensor based on accelerometers and fluxgate magnetometers. By analyzing temperature error and fix error which affect the orientation accuracy, a new error correcting model has been put forward. Testing results show that the MWD orientation sensor system utilizing the suggested compensation model is more accurate in directional...
A method for license plate location based on SVM is proposed in this paper. Firstly, the mathematical models of SVM are introduced, and then the feature extractions of license plate image are discussed, finally it is proved that this location method is very precise and efficient by experiments in VC development environment.
This paper proposes an improved natural gradient algorithm for blind source separation (BSS) based on the constrained optimization method. The improved algorithm introduces a scaling factor that restricts the training process by the balance spot, which adds little computational complexity and overcomes the conflict between the convergence rate and the steady-state accuracy. Therefore, the new algorithm...
This paper presents an improved 32-bit binary logarithm converter, which is optimized according to the characteristics of Xilinx Virtex4 series FPGA. The implementation in FPGA denotes that our improved method not only costs less resources but also has much higher speed. Meanwhile a novel and simple error correction method is proposed. It reduces the converter error to only one half of the Metchell's...
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