An algorithm for the optimal placement and routing of a circuit within a ring of pads

1983 ◽  
Author(s):  
Brenda S. Baker ◽  
Ron Y. Pinter
Keyword(s):  
Optimal Placement ◽  
Placement And Routing

scholarly journals Accurate Interconnection Length Estimations for Predictions Early in the Design Cycle

VLSI Design ◽  
1999 ◽  
Vol 10 (1) ◽  
pp. 1-20 ◽  
Author(s):  
Dirk Stroobandt ◽  
Jan Van Campenhout
Keyword(s):  
Upper Bound ◽  
Accurate Estimate ◽  
Optimal Placement ◽  
Electronic Circuits ◽  
Length Estimation ◽  
Design Cycle ◽  
Placement And Routing ◽  
Routing Techniques ◽  
Space Requirements

Important layout properties of electronic circuits include space requirements and interconnection lengths. In the process of designing these circuits, a reliable pre-layout interconnection length estimation is essential for improving placement and routing techniques. Donath found an upper bound for the average interconnection length that follows the trends of experimentally observed average lengths. Yet, this upper bound deviates from the experimental value by a factor δ ≈ 2, which is not sufficiently accurate for some applications. We show that we obtain a significantly more accurate estimate by taking into account the inherent features of the optimal placement process.

Research of Chip Placement and Routing Algorithms for Board-Level Photoelectric Interconnection

2014 ◽  
Vol 556-562 ◽  
pp. 1577-1579
Author(s):  
Jian Liu ◽  
Zhao Hua Wu
Keyword(s):  
Genetic Algorithm ◽  
Genetic Algorithms ◽  
Routing Algorithms ◽  
Optimal Placement ◽  
Improved Method ◽  
Improved Genetic Algorithm ◽  
C Language ◽  
Placement And Routing ◽  
Board Level ◽  
Improved Algorithm

This document improved genetic algorithm and Intelligent discern points algorithmin chip placement and routing for Board-level photoelectric interconnection, by comparisonofthe algorithm results to verify the effectiveness and practicality of the improved algorithm. First introduced the features of chip placement and routing for Board-level Photoelectric Interconnection. Then describes the improved method of genetic algorithms and intelligent discern points algorithms. Finally, implement algorithm by C language on VC6.0++ platform, while the data import MATLAB to displays the optimal placement and routing results. The results show that the effectiveness of improved algorithm, which has a guiding significance for the chip placement and routing.

Optimal placement and routing strategies for resilient two-tiered sensor networks

2009 ◽  
Vol 9 (7) ◽  
pp. 920-937 ◽  
Author(s):  
Ataul Bari ◽  
Arunita Jaekel ◽  
Subir Bandyopadhyay
Keyword(s):  
Sensor Networks ◽  
Optimal Placement ◽  
Placement And Routing

Optimisation of Cardiac Resynchronisation Therapy with MultiPoint™ Pacing

2015 ◽  
Vol 4 (3) ◽  
pp. 3
Author(s):  
Antonio Curnis ◽  
David O’Donnell ◽  
Axel Kloppe ◽  
Žarko Calovic ◽  
◽  
...  
Keyword(s):  
Systolic Function ◽  
Biventricular Pacing ◽  
Heart Rhythm ◽  
Cardiac Resynchronisation Therapy ◽  
Left Ventricular ◽  
Optimal Placement ◽  
Jude Medical ◽  
Number Of Patients ◽  
Cardiac Resynchronisation ◽  
Resynchronisation Therapy

Cardiac resynchronisation therapy (CRT) using biventricular pacing is an established therapy for impairment of left ventricular (LV) systolic function in patients with heart failure (HF). Although technological advances have improved outcomes in patients undergoing biventricular pacing, the optimal placement of pacing leads remains challenging, and approximately one third of patients have no response to CRT. This may be due to patient selection and lead placement. Electrical mapping can greatly improve outcomes in CRT and increase the number of patients who derive benefit from the procedure. MultiPoint™ pacing (St Jude Medical, St Paul, MN, US) using a quadripolar lead increases the possibility of finding the best pacing site. In clinical studies, use of MultiPoint pacing in HF patients undergoing CRT has been associated with haemodynamic and clinical benefits compared with conventional biventricular pacing, and these benefits have been sustained at 12 months. This article describes the proceedings of a satellite symposium held at the European Heart Rhythm Association (EHRA) Europace conference held in Milan, Italy, in June 2015.

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