Loading and rendering XFile in directX

Conference Name:2012 International Conference on Computer Science and Electronics Engineering, ICCSEE 2012. Conference Address: Hangzhou, Zhejiang, China. Time:March 23, 2012 - March 25, 2012.Xi'an Technological University; Shaanxi New Network and Monitoring Control Engineering LaboratoryUsing C ++, we implement XFile loading based on DirectX, then generate three-dimensional mesh with the information of XFile and render it at last. And with further research on progressive mesh, we achieve controlling the precision of the three dimensional mesh. 漏 2012 IEEE

Recognizing Teachers’ Hand Gestures for Effective Non-Verbal Interaction

Hand gesturing is one of the most useful non-verbal behaviors in the classroom, and can help students activate multi-sensory channels to complement teachers’ verbal behaviors and ultimately enhance teaching effectiveness. The existing mainstream detection algorithms that can be used to recognize hand gestures suffered from low recognition accuracy under complex backgrounds and different backlight conditions. This study proposes an improved hand gesture recognition framework based on key point statistical transformation features. The proposed framework can effectively reduce the sensitivity of images to background and light conditions. We extracted key points of the image and establish a weak classifier to enhance the anti-interference ability of the algorithm in the case of noise and partial occlusion. Then, we used a deep convolutional neural network model with multi-scale feature fusion to recognize teachers’ hand gestures. A series of experiments were conducted on different human gesture datasets to verify the performance of the proposed framework. The results show that the framework proposed in this study has better detection and recognition rates compared to the you only look once (YOLO) algorithm, YOLOv3, and other counterpart algorithms. The proposed framework not only achieved 98.43%, measured by F1 score, for human gesture images in low-light conditions, but also has good robustness in complex lighting environments. We used the proposed framework to recognize teacher gestures in a case classroom setting, and found that the proposed framework outperformed YOLO and YOLOv3 algorithms on small gesture images with respect to recognition performance and robustness

Recognizing Teachers’ Hand Gestures for Effective Non-Verbal Interaction

Hand gesturing is one of the most useful non-verbal behaviors in the classroom, and can help students activate multi-sensory channels to complement teachers’ verbal behaviors and ultimately enhance teaching effectiveness. The existing mainstream detection algorithms that can be used to recognize hand gestures suffered from low recognition accuracy under complex backgrounds and different backlight conditions. This study proposes an improved hand gesture recognition framework based on key point statistical transformation features. The proposed framework can effectively reduce the sensitivity of images to background and light conditions. We extracted key points of the image and establish a weak classifier to enhance the anti-interference ability of the algorithm in the case of noise and partial occlusion. Then, we used a deep convolutional neural network model with multi-scale feature fusion to recognize teachers’ hand gestures. A series of experiments were conducted on different human gesture datasets to verify the performance of the proposed framework. The results show that the framework proposed in this study has better detection and recognition rates compared to the you only look once (YOLO) algorithm, YOLOv3, and other counterpart algorithms. The proposed framework not only achieved 98.43%, measured by F1 score, for human gesture images in low-light conditions, but also has good robustness in complex lighting environments. We used the proposed framework to recognize teacher gestures in a case classroom setting, and found that the proposed framework outperformed YOLO and YOLOv3 algorithms on small gesture images with respect to recognition performance and robustness

Moving Window Differential Evolution Independent Component Analysis-Based Operational Modal Analysis for Slow Linear Time-Varying Structures

In order to identify time-varying transient modal parameters only from nonstationary vibration response measurement signals for slow linear time-varying (SLTV) structures which are weakly damped, a moving window differential evolution (DE) independent component analysis- (ICA-) based operational modal analysis (OMA) method is proposed in this paper. Firstly, in order to overcome the problems in traditional ICA-based OMA, such as easy to go into local optima and difficult-to-identify high-order modal parameters, we combine DE with ICA and propose a differential evolution independent component analysis- (DEICA-) based OMA method for linear time invariant (LTI) structures. Secondly, we combine the moving widow technique with DEICA and propose a moving window differential evolution independent component analysis- (MWDEICA-) based OMA method for SLTV structures. The MWDEICA-based OMA method has high global searching ability, robustness, and complexity of time and space. The modal identification results in a three-degree-of-freedom structure with slow time-varying mass show that this MWDEICA-based OMA method can identify transient time-varying modal parameters effectively only from nonstationary vibration response measurement signals and has better performances than moving window traditional ICA-based OMA

Visual Implement of Virtual Reality Tour based on VRML

Conference Name:3rd International Conference on Measuring Technology and Mechatronics Automation (ICMTMA 2011). Conference Address: Shanghai, PEOPLES R CHINA. Time:JAN 06-07, 2011.In this paper, a visual solution is presented about virtual reality tour of Web3D based on VRML. After analysis of polyline architectural structure related to tour route, a parametric definition of polyline is given, and a visual editor system of polyline is developed. With our experience on the VR project,the automatic generation algorithm is proposed about the VR tour based on VRML. The application shows that the proposed way can efficiently improve the performance quality of the project

Optimizing for large time delay systems by BP neural network and evolutionary algorithm improving

BP artificial neural network is a non-feedback network. This paper utilizes the initial weights of neural network to choose controller performance. Simultaneously according to the characteristics that process of central air-conditioning energy saving control is the system of multi-parameter and nonlinear time-varying complexity, we analysis and study its algorithm and system architecture. The experimental results demonstrate that new control system gets better results and energy saving. ? 2011 ACADEMY PUBLISHER

Urban Traffic Signal Control Based on Multiobjective Joint Optimization

This paper proposes two algorithms for signal timing optimization of single intersections, namely, microbial genetic algorithm and simulated annealing algorithm. The basis of the optimization of these two algorithms is the original timing scheme of the SCATS, and the optimized parameters are the average delay of vehicles and the capacity. Experiments verify that these two algorithms are, respectively, improved by 67.47% and 46.88%, based on the original timing scheme