Filters








2,895 Hits in 7.0 sec

Fast and Robust Quadratic Placement Combined with an Exact Linear Net Model

Peter Spindler, Frank Johannes
2006 Computer-Aided Design (ICCAD), IEEE International Conference on  
Compared with the classical clique net model, our linear net model reduces memory usage by 75%, CPU time by 23% and netlength by 8%, which is measured by the HPWL of all nets.  ...  In addition, a new linear net model is proposed, which accurately models the half-perimeter wirelength (HPWL) in the quadratic cost function of quadratic placement.  ...  Lienig for his valuable comments and U. Schlichtmann for his continuous support.  ... 
doi:10.1109/iccad.2006.320083 fatcat:27lag26nhbd6hjjab52s6whsne

Fast and robust quadratic placement combined with an exact linear net model

Peter Spindler, Frank M. Johannes
2006 Computer-Aided Design (ICCAD), IEEE International Conference on  
Compared with the classical clique net model, our linear net model reduces memory usage by 75%, CPU time by 23% and netlength by 8%, which is measured by the HPWL of all nets.  ...  In addition, a new linear net model is proposed, which accurately models the half-perimeter wirelength (HPWL) in the quadratic cost function of quadratic placement.  ...  Lienig for his valuable comments and U. Schlichtmann for his continuous support.  ... 
doi:10.1145/1233501.1233537 dblp:conf/iccad/SpindlerJ06 fatcat:oz3orljr4nge5elolvcvea62zm

Quadratic placement revisited

C. J. Alpert, T. Chan, D. J.-H. Huang, I. Markov, K. Yan
1997 Proceedings of the 34th annual conference on Design automation conference - DAC '97  
The methodology iterates between two basic steps: solving sparse systems of linear equations, and repartitioning. This work dissects the implementation and motivations for quadratic placement.  ...  The "quadratic placement" methodology is rooted in [6] [14] [16] and is reputedly used in many commercial and in-house tools for placement of standard-cell and gate-array designs.  ...  and an exact bisection requirement.  ... 
doi:10.1145/266021.266362 dblp:conf/dac/AlpertCHMY97 fatcat:yto73khrofe6vlsuvu4khjcole

A network-flow approach to timing-driven incremental placement for ASICs

Shantanu Dutt, Huan Ren, Fenghua Yuan, Vishal Suthar
2006 Computer-Aided Design (ICCAD), IEEE International Conference on  
FlowPlace includes: a) a timing-driven (TD) analytical global placer TAN that uses accurate delay functions and minimizes a combination of linear and quadratic objective functions; b) a network flow based  ...  Starting with a state-of-the-art TD placer TD-Dragon, for the TD-Dragon benchmarks we obtain up to about 10% and an average of 4.3% delay improvement with 12% of TD-Dragon's run times; this is significant  ...  Net Delays and Objective Function We assume that we start with an unrouted placement 1 , and thus use the routing model shown in Fig. 2(b) .  ... 
doi:10.1145/1233501.1233577 dblp:conf/iccad/DuttRYS06 fatcat:s5xwfizqerh4jhzrcfsxsxjmpa

A Network-Flow Approach to Timing-Driven Incremental Placement for ASICs

Shantanu Dutt, Huan Ren, Fenghua Yuan, Vishal Suthar
2006 Computer-Aided Design (ICCAD), IEEE International Conference on  
FlowPlace includes: a) a timing-driven (TD) analytical global placer TAN that uses accurate delay functions and minimizes a combination of linear and quadratic objective functions; b) a network flow based  ...  Starting with a state-of-the-art TD placer TD-Dragon, for the TD-Dragon benchmarks we obtain up to about 10% and an average of 4.3% delay improvement with 12% of TD-Dragon's run times; this is significant  ...  Net Delays and Objective Function We assume that we start with an unrouted placement 1 , and thus use the routing model shown in Fig. 2(b) .  ... 
doi:10.1109/iccad.2006.320061 fatcat:2qffc4gsyjhsvoua7tgz7vmh7u

BonnTools: Mathematical Innovation for Layout and Timing Closure of Systems on a Chip

Bernhard Korte, Dieter Rautenbach, Jens Vygen
2007 Proceedings of the IEEE  
In this paper we present the main ideas for placement, routing, timing optimization, and clock tree synthesis, which are the foundation of a continuing success story.  ...  During 20 years of cooperation between the University of Bonn and IBM, new mathematical foundations and algorithms have been developed for the need of new technologies and leading-edge designs.  ...  ACKNOWLEDGEMENTS We thank all current and former members of our team in Bonn. Moreover, we thank our cooperation partners at IBM and Magma.  ... 
doi:10.1109/jproc.2006.889373 fatcat:q2udxc4kmva6rn2ae6a5fud5te

GLiDE: Generalizable Quadrupedal Locomotion in Diverse Environments with a Centroidal Model [article]

Zhaoming Xie, Xingye Da, Buck Babich, Animesh Garg, Michiel van de Panne
2022 arXiv   pre-print
We show that RL-based control of the accelerations of a centroidal model is surprisingly effective, when combined with a quadratic program to realize the commanded actions via ground contact forces.  ...  It allows for a simple reward structure, reduced computational costs, and robust sim-to-real transfer.  ...  When used in combination with a simple foot placement strategy, it requires significantly less computation for scenarios that require complex contact modeling, such as stepping stone and balance beam traversal  ... 
arXiv:2104.09771v3 fatcat:grrtzghawrf4tjiw4xtzynmx2q

Discretized Network Flow Techniques for Timing and Wire-Length Driven Incremental Placement With White-Space Satisfaction

Shantanu Dutt, Huan Ren
2011 IEEE Transactions on Very Large Scale Integration (vlsi) Systems  
FlowPlace includes: a) a timing-driven (TD) analytical global placer TAN that uses accurate pre-route delay functions and minimizes a combination of linear and quadratic objective functions; b) a discretized  ...  unrouted net delay models that are suitable for an analytical placer; and (d) an effective probability-based WL-cost function in detailed placement for reducing WL deterioration while performing TDincremental  ...  linear and quadratic terms.  ... 
doi:10.1109/tvlsi.2010.2050632 fatcat:wtzzjhe42ve7dfumz5cxcw5hia

StarPlace: A new analytic method for FPGA placement

M. Xu, G. Grewal, S. Areibi
2011 Integration  
With an aim towards developing a scalable FPGA placer we present an analytic placement method based on a near-linear net model, called star +.  ...  Most importantly, with the star + model incremental changes in cost resulting from block movement can be computed in O(1) time, regardless of the size of the net.  ...  The ultra-fast placement (UFP) method proposed by Sankar and Rose [17] seek to improve the runtime of VPR by combining VPR with a multi-level clustering strategy.  ... 
doi:10.1016/j.vlsi.2011.02.001 fatcat:5swtjbar5rg3hhph3peahujj2u

Well placement optimization with the covariance matrix adaptation evolution strategy and meta-models

Zyed Bouzarkouna, Didier Yu Ding, Anne Auger
2011 Computational Geosciences  
In addition, to improve the optimization procedure two new techniques are proposed: -Adaptive penalization with rejection in order to handle well placement constraints; -Incorporation of a meta-model,  ...  It is shown that our new approach outperforms the genetic algorithm: it leads in general to both a higher net present value and a significant reduction in the number of reservoir simulations needed to  ...  This work was partially funded by the ANR-08-COSI-007-12 grant and by the FUI of System@tic Paris-Region ICT cluster through contract DGT 117 407 Complex Systems Design Lab (CSDL).  ... 
doi:10.1007/s10596-011-9254-2 fatcat:5q6f2njmijamdgftyenbjagdxa

A survey on control schemes for distributed solar collector fields. Part II: Advanced control approaches

E.F. Camacho, F.R. Rubio, M. Berenguel, L. Valenzuela
2007 Solar Energy  
A classification of the modeling and control approaches described in the first part of this survey is used to explain the main features of each strategy.  ...  The treated strategies range from classical advanced control strategies to those with few industrial applications.  ...  Capital and Mobility -Large Installations Program'', EC-DGS XII Program ''Training and Mobility of Researchers'' and EC-DGS XII program ''Improving Human Potential'' and promoted by CIE-MAT -PSA, Spain  ... 
doi:10.1016/j.solener.2007.01.001 fatcat:szx5q5v54jf2lhv3hgpzub7bwa

2020 Index IEEE Transactions on Signal Processing Vol. 68

2020 IEEE Transactions on Signal Processing  
., and Rahmani, M., One-Step Prediction for Discrete Time-Varying Nonlinear Systems With Unknown Inputs and Correlated Noises; TSP  ...  Sharma, N., +, TSP 2020 1409-1424 An Exact Expectation Model for the LMS Tracking Abilities.  ...  ., +, TSP 2020 6198-6211 The Autoregressive Linear Mixture Model: A Time-Series Model for an Instantaneous Mixture of Network Processes.  ... 
doi:10.1109/tsp.2021.3055469 fatcat:6uswtuxm5ba6zahdwh5atxhcsy

Frequency-Aware Model Predictive Control

Ruben Grandia, Farbod Farshidian, Alexey Dosovitskiy, Rene Ranftl, Marco Hutter
2019 IEEE Robotics and Automation Letters  
trajectories and enabled the machine to walk robustly on terrain with unmodeled compliance.  ...  Through simulation and hardware experiments we show that motion plans can be made compatible with bandwidth limits set by actuators and contact dynamics.  ...  Afterward, the integration with a sequential linear quadratic model predictive control (SLQ-MPC) method [17] is presented.  ... 
doi:10.1109/lra.2019.2895882 fatcat:gz4y5m45qjf4pf4uzsf3w73lm4

A Combined Multiple Model Adaptive Control Scheme and Its Application to Nonlinear Systems With Nonlinear Parameterization

Weitian Chen, Brian D. O. Anderson
2012 IEEE Transactions on Automatic Control  
., +, TAC March 2012 565-578 A Combined Multiple Model Adaptive Control Scheme and Its Application to Nonlinear Systems With Nonlinear Parameterization.  ...  ., +, TAC July 2012 1723-1735 Stability A Combined Multiple Model Adaptive Control Scheme and Its Application to Nonlinear Systems With Nonlinear Parameterization.  ... 
doi:10.1109/tac.2011.2176162 fatcat:2airdooti5fi7kmuozmodywcga

2007 Index IEEE Transactions on Automatic Control Vol. 52

2007 IEEE Transactions on Automatic Control  
., and Sreeram, V., Partial-Fraction Expansion Based Frequency Weighted Model Reduction Technique With Error Bounds; TAC Oct. 2007 Oct. 1942Oct. -1948 Ghosh, B. K., see Polpitiya, A.  ...  ., and Pappas, G.  ...  ., +, TAC Aug. 2007 1404-1414 Combined Design of Disturbance Model and Observer for Offset-Free Model Predictive Control.  ... 
doi:10.1109/tac.2007.913948 fatcat:vpztpth7jnhk7b5o5bt2nyrrdm
« Previous Showing results 1 — 15 out of 2,895 results