Recent advances in broadband technology have caused forwarding engines to handle pack- ets with over 10 gigabit per second. In this paper, we present a high-speed forwarding pipeline which can finish all of the routin...Recent advances in broadband technology have caused forwarding engines to handle pack- ets with over 10 gigabit per second. In this paper, we present a high-speed forwarding pipeline which can finish all of the routing and forwarding tasks in the way of pipelining. We also establish the analysis model of the pipeline with which one can evaluate some key performance parameters of the forwarding engine such as forwarding rate and forwarding delay. We find that the pipeline is of good scalability and can forward unicast packets up to the speed of 40Gbit/s.展开更多
The field of shape grammars spans 47 years,but its potential in the practice and education of art,architecture,and engineering remains far from being utilized.Similarly,while reverse engineering in some engineering di...The field of shape grammars spans 47 years,but its potential in the practice and education of art,architecture,and engineering remains far from being utilized.Similarly,while reverse engineering in some engineering disciplines is well-established,its implementation in architectural design remains under-represented.By combining the two domains,this paper develops a novel method that merges the power of shape grammars as a parsing tool in reverse engineering to decode the morphogenesis of visual compositions in architectural design.The merged power is demonstrated by decoding the formal language of a faqade design of a case study,in which seemingly few simple rules can derive surprisingly complex compositions.The rules of the language can then be used to reconstruct parts of the case facade.Most shape grammars in the architectural literature are applied on formal historical precedents,but the subject of morphological analysis in this paper is contemporary and has a style that exhibits non-orthogonal configurations,which initially appear far from being standardized or subjected to regulatory tectonic rules.The faqade derivation grammar is explained and resynthesized in various computations to explore emergent articulations that display its predictive,synthetic,and generative powers in addition to typical analytic ones.展开更多
基金Supported by the National High Technology Research and Development Program of China (No.2003AA103510).
文摘Recent advances in broadband technology have caused forwarding engines to handle pack- ets with over 10 gigabit per second. In this paper, we present a high-speed forwarding pipeline which can finish all of the routing and forwarding tasks in the way of pipelining. We also establish the analysis model of the pipeline with which one can evaluate some key performance parameters of the forwarding engine such as forwarding rate and forwarding delay. We find that the pipeline is of good scalability and can forward unicast packets up to the speed of 40Gbit/s.
文摘The field of shape grammars spans 47 years,but its potential in the practice and education of art,architecture,and engineering remains far from being utilized.Similarly,while reverse engineering in some engineering disciplines is well-established,its implementation in architectural design remains under-represented.By combining the two domains,this paper develops a novel method that merges the power of shape grammars as a parsing tool in reverse engineering to decode the morphogenesis of visual compositions in architectural design.The merged power is demonstrated by decoding the formal language of a faqade design of a case study,in which seemingly few simple rules can derive surprisingly complex compositions.The rules of the language can then be used to reconstruct parts of the case facade.Most shape grammars in the architectural literature are applied on formal historical precedents,but the subject of morphological analysis in this paper is contemporary and has a style that exhibits non-orthogonal configurations,which initially appear far from being standardized or subjected to regulatory tectonic rules.The faqade derivation grammar is explained and resynthesized in various computations to explore emergent articulations that display its predictive,synthetic,and generative powers in addition to typical analytic ones.
