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Scene space organizational structure and visibility culling plays a crucial role in the quality and efficiency of subsequent rendering. To improve the real-time rendering of indoor and outdoor objects and enhance the organization efficiency of scenes, we propose an optimized scene management structure for fast visibility culling. We organize the scene into an adaptive binary tree (ABT) structure to...
Scene management technology is one of the key technologies of virtual reality and visualization. In this paper, we propose a new method based on adaptive binary tree (ABT) and scene graph, which is used to improve the real-time rendering of indoor and outdoor objects and enhance the organization efficiency of scenes structure. The generation algorithm of adaptive binary tree, the scoring standard...
Dynamic voltage Scaling (DVS) has been widely studied as an innovative technology in reducing the real-time embedded devices. An efficient performance of DVS algorithm largely depends on how to acquire more slack times to scale voltage down. In this paper, we present a more effective power management algorithm to reclaim online slack time from both higher-priority and lower-priority tasks. Based on...
Feed rate has always been one of the most important indicators for CNC performance, while transfer velocity between two adjacent segments pays a key role in improving feed rate. Since the contour of a special part commonly consists of line and arc segments (non-micro segments), as well as continuous micro line segments (micro segments) so there should be different methods to deal with their transfer...
Tool path generation is an important research content in NC machining of free-form surfaces. In this paper, according to analyzing tool path generation strategies and algorithms, a new tool path generation algorithm based on Z-map model is designed and implemented. The triangulation approach is employed to acquire higher machining precision, multi-objective evolutionary algorithm is used to detect...
The real-time scheduling algorithms play an important role in real-time systems. Whether or not the real-time tasks could be completed within the specified deadline mainly relies on scheduling algorithms. This article proposes a sectional real-time scheduling algorithm called SS (sectional scheduling), and this algorithm divides the system load into three cases according to the intension of system...
Prior effect-cause based chain diagnosis algorithms suffer from accuracy and performance problems when multiple stuck-at faults exist on the same scan chain. In this paper, we propose new chain diagnosis algorithms based on dominant fault pair to enhance diagnosis accuracy and efficiency. Several heuristic techniques are proposed, which include (1) double candidate range calculation, (2) dynamic learning...
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