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As technology advances, modern physical synthesis flows pose layer directive and scenic constraints to global routing. Respecting these constraints in global routing is critical to achieve timing closure. In this paper, we propose a 3-D global routing algorithm which simultaneously respects layer directive constraints and scenic constraints. The routing algorithm is based on iterative ripping-up and...
Cell migration has been widely used in global placement for the highly efficiency in smoothing cells overlap. The current cell migration methods only locally or globally smooth the density without considering the relation between the local and the global density. Furthermore, the cells generally are treated as points with area. In this paper we present a new cell migration technique called CSAGO to...
In this paper, we propose a fast routability-driven routing algorithm for hierarchical FPGAs (HFPGAs), using several strategies to steer the automated process of rip up and reroute in order to speed up the process and reach the same effectiveness of Pathfinder's negotiation mechanism. Net is expelled from congestion zone to resourceful zone. The algorithm is divided into two procedures. First, it...
The technique of cell shifting has the advantage of linearly smoothing the overlap in placement. In the shifting process we should preserve the integrity of the original placement as much as possible and do less damage to the relative locations of the cells. The current cell shifting methods only locally or globally smooth the density without considering the relation between the local and the global...
For a computing system to be trusted, it is equally important to verify that the system performs no more and no less functionalities than desired. Traditional testing and verification methods are developed to validate whether the system meets all the requirements. They cannot detect the existence or show the non-existence of the unknown undesired functionalities. In this paper, we propose a novel...
A semantic-based CAD system for mammography is proposed. Semantic layer is added to the computer aided diagnosis procedure by comprehend the lesion symptom of mammogram and clinical information. This provides doctor a complete and standardization semantic interpretation of the case. Final result is obtained through the synthetic analysis of the acquired semantic information by a Bayesian semantic...
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