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About 7,601 papers for “parallel performance comparison”

Performance comparison of three topologies of the island model of a parallel genetic algorithm implementation on a cluster platform

Irma R. Andalon-Garcia, Arturo Chavoya · 2012

Parallel genetic algorithms (PGAs) have been used to improve the potential of genetic algorithms, which are efficient search techniques that have been employed in producing satisfactory solutions to optimization problems in which the application of standard techniques is not feasible or recommended. We implemented three communication topologies of the island model of a PGA, with the aim of analyzing the performance of the migration models applied. The topologies implemented were the star, the unidirectional ring and the bidirectional ring topologies. The implementation was developed on a cluster platform through the use of the standard Message Passing Interface (MPI) library. In order to test the performance of the algorithm with its variants, well-known benchmark functions were used.

Cited by 12

A comparison of the performance of finite difference time-domain, finite element time-domain, and discrete surface integral equation methods on high performance parallel computers

Stephen D. Gedney · 2002

Volume based time-domain methods have played a pronounced role in the modeling of the interaction of electromagnetic waves within complex media. Currently a number of highly robust and computationally efficient techniques are in use. Those of interest to this paper are the finite difference time-domain (FDTD) method, the finite element time-domain (FETD) method, and the discrete surface integral equation (DSI) method. The purpose of this paper is to provide a comparison of the performance of the FDTD, FETD, and DSI techniques on high performance distributed memory parallel computers. Efficient parallel algorithms for each method based on spatial (domain) decomposition techniques is presented. The comparison of the techniques is based on: computational efficiency, memory requirements, accuracy, and scalability on parallel computers. To this end, a number of numerical examples based on the analysis of printed microwave circuits and antennas are presented.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

Cited by 5

Performance comparison of mixed mode and indirect mode parallel flow forced convection solar driers for drying <i>Curcuma zedoaria</i>

D.V.N. Lakshmi, P. Muthukumar, Jasinta Poonam Ekka et al. · Journal of Food Process Engineering · 2019

Abstract This study focuses on energy and drying kinetic analyses of Curcuma zedoaria (white turmeric) dried in mixed and indirect active parallel flow solar dryers. Dryer efficiency, specific energy consumption and drying rate are studied. The overall dryer efficiency of mixed mode (MFSCD) is 26.5% higher than indirect mode (IFSCD) solar dryer. Two term model and Verma model fit best for Curcuma zedoaria drying in MFSCD and IFSCD, respectively, and Logarithmic model is quite suitable for open sun drying (OSD). The effective moisture diffusivity of the product dried under MFSCD is highest as compared to IFSCD and OSD products. The quality analyses show that higher values of TFC (78.11 mg GAE/g of sample) and DPPH (120.56 μ mol of TE/g of sample) are reported in the samples dried in MFSCD as compared to IFSCD and OSD samples. Practical applications Conventional open sun drying is a common practice followed by small farmers for drying herbs and spices. Products dried under open sun lose their nutritional and medicinal values due to slow drying rate and improper heating. The present work focusses on the development of a low cost solar dryer for drying of high value medicinal herbs like Curcuma zedoaria , curcuma caesia, and black cardamom. Study of drying kinetics helps in improving the design aspects of solar dryer and optimization of the drying systems. Drying time of the Curcuma zedoaria dried in the developed dryer is about 60% less than the open sun drying and the retention of color, antioxidant, and texture of the solar dried products is excellent. The developed solar dryer will be suitable for small small‐scale farmers and can be scaled up to any size.

Cited by 46

Supplementary_Tables_Revision_AMC_060720 – Supplemental material for Performance Comparison of Massively Parallel Sequencing (MPS) Instruments Using Single-Nucleotide Polymorphism (SNP) Panels for Ancestry

Cooley, Ashley M., Meiklejohn, Kelly A., Damaso, Natalie et al. · Sage Journals Data · 2020

Supplemental material, Supplementary_Tables_Revision_AMC_060720 for Performance Comparison of Massively Parallel Sequencing (MPS) Instruments Using Single-Nucleotide Polymorphism (SNP) Panels for Ancestry by Ashley M. Cooley, Kelly A. Meiklejohn, Natalie Damaso, James M. Robertson and Tracey Dawson Cruz in SLAS Technology

Cited by 0Open access

Structural Performance of Parallel Concrete Panel Container Towards Green Coastal and Port's Retaining Wall: A Comparison of Tie Rod Configurations

Affandy Hamid, Suranto Suranto, Dinar Catur Istiyanto et al. · Evergreen · 2024

A retaining wall is among the common structures required in the coastal and port areas.This structure is constructed to support and protect elevated land near the coastline, e.g., coastal road embankments, or to develop port service areas, such as container yards, loading-unloading areas, etc.Despite its limited actual field implementation, a Parallel Concrete Panel Container type of wall structure is available.It has been promoted for its ease of construction in the coastal area, less use of concrete material, and less space occupation.The present study assessed the potential implementation of this structure as a retaining wall in coastal and port areas.In this study, the structural stability and strength analysis of the PCP is carried out for two types of tie rod configurations.The analysis was conducted using the numerical simulation software of PLAXIS 2D and SAP 2000.The results show that the container with a diagonal bonding configuration type A performs better overall structural efficiency than the one with a horizontal bonding configuration type B. The PLAXIS modeling results showed that PCP types A and B had safety factor values of 1.35 and 1.32, respectively.These values indicated that both structures worked stably.Additionally, it implies that the soil has sufficient strength to support the applied loads without failure.

Cited by 0Open access

Modeling of Radiotherapy Linac Source Terms Using ARCHER Monte Carlo Code: Performance Comparison for GPU and MIC Parallel Computing Devices

Hui Lin, Tianyu Liu, Lin Su et al. · EPJ Web of Conferences · 2017

Monte Carlo (MC) simulation is well recognized as the most accurate method for radiation dose calculations. For radiotherapy applications, accurate modelling of the source term, i.e. the clinical linear accelerator is critical to the simulation. The purpose of this paper is to perform source modelling and examine the accuracy and performance of the models on Intel Many Integrated Core coprocessors (aka Xeon Phi) and Nvidia GPU using ARCHER and explore the potential optimization methods. Phase Space-based source modelling for has been implemented. Good agreements were found in a tomotherapy prostate patient case and a TrueBeam breast case. From the aspect of performance, the whole simulation for prostate plan and breast plan cost about 173s and 73s with 1% statistical error.

Cited by 3Open access

Performance Comparison Between Differential Evolution and Bat Algorithm in P.I.D Tuning for Optimization of Speed Control on Parallel Hybrid Electric Vehicle

Eddy Lybrech Talakua, Erwin Dhaniswara, Simson Simson · FIDELITY Jurnal Teknik Elektro · 2024

In the last decade, there have been many means of transportation that use fuel oil (Internal Combustion Engine (ICE)). This has a serious impact on the environment due to the resulting pollutant gas emissions. One solution is the use of hybrid electric vehicles (HEV) as a replacement for vehicles that use ICE. One of the performances that a HEV must have is to have a stable speed when driving. In this research, several methods used in the metaheuristic algorithm in the disturbance observer have the advantage of describing the inverse model of the plant without creating a mathematical model. Testing was carried out by comparing two methods of metaheuristic algorithms, namely Differential Evolution and Bat Algirthm. The simulation results show that the method used on this HEV is to maintain its speed, so according to the test results it shows that the Differential Evolution method is the best method for controlling speed on a Parallel Hybrid Electic Vehicle.

Cited by 0Open access

Comparison of performance for third order immune photonic transmission link incorporating phase shifters and biased optimized dual parallel Mach–Zehnder modulator

Pulkit Berwal, Sarika Singh · Journal of Optical Communications · 2023

Abstract This paper presents a comprehension on the linearization arrangements achieved through dual drive dual parallel Mach–Zehnder (DD-DPMZM) by changing bias voltages of sub-modulators and adjusting phases of RF signals. These arrangements comprise of a DD-DPMZM and electric phase shifters. For single sideband (SSB) modulation in sub-modulators of DD-DPMZM, power at intermodulation is found to be 43 dB and 61 dB for the linearized and convention single modulator link respectively. Thus, 28 dB of improvement in suppression of third order intermodulation distortion is reported for the first arrangement of linearization. For quadrature modulation in upper MZM and optical carrier suppression (OCS) modulation in lower modulator, almost complete suppression of IMD3 terms are demonstrated and found to be better performance arrangement for bias optimized dual parallel Mach–Zehnder modulator based linearization link.

Cited by 0

Comparison of the transmit performance and Local SAR for multi-row parallel transmit coil arrays at 3 Tesla human brain MRI

Nejat Karadeniz, Joseph V. Hajnal, Özlem İpek · Proceedings on CD-ROM - International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition/Proceedings of the International Society for Magnetic Resonance in Medicine, Scientific Meeting and Exhibition · 2024

MRI multi-row array coils can offer increased flexibility to control and tailor the RF field distribution through RF Shimming. The performance of various multi-row configurations of parallel-transmit (pTx) RF coil array for brain imaging at 3T is investigated using electromagnetic field simulations with digital human computational model for overlapping and non-overlapping loop coil elements in 16- to 24-channel single, double, triple-row arrays. We found that triple-row coil arrays improve the transmit field homogeneity in the entire volume of the head. The double-row coil array offers the best SAR efficiency among other investigated coils.

Cited by 1

Multitasking TORT Under UNICOS: Parallel Performance Models and Measurements

Azmy, Y.Y.; Barnett, D.A. · University of North Texas Digital Library (University of North Texas) · 1999

The existing parallel algorithms in the TORT discrete ordinates were updated to function in a UNI-COS environment. A performance model for the parallel overhead was derived for the existing algorithms. The largest contributors to the parallel overhead were identified and a new algorithm was developed. A parallel overhead model was also derived for the new algorithm. The results of the comparison of parallel performance models were compared to applications of the code to two TORT standard test problems and a large production problem. The parallel performance models agree well with the measured parallel overhead.

Cited by 0Open access

Parallel Overhead in Executing Data-Parallel Programs on *T

Andrew Shaw · 2007

this paper, we show some performance results from an implemention of a data-parallel programming language on the *T parallel computer [4]. The measure of performance used is the amount of overhead incurred by executing the parallel program in comparison to executing a sequential program with the same functionality. In this paper, we call this overhead &amp;quot;parallel overhead&amp;quot;.

Cited by 0

Performance Analysis of Parallel Programs

Thomas Rauber, Gudula Rünger · 2023

The most important motivation for using a parallel system is the reduction of the execution time of computation-intensive application programs. In this chapter, performance measures for an analysis and comparison of different versions of a parallel program are considered in more detail. The topics covered include the quantitative performance evaluation of computer systems with performance metrics and benchmarks, performance metrics for evaluating parallel programs, execution times for global communication operations, the analysis of parallel execution times, parallel computation models, as well as loop scheduling and loop tiling methods.

Cited by 0Open access

Performance Factors in Parallel Discrete Event Simulation

Jan Lemeire, Erik Dirkx · 2001

Performance is a key issue in parallel simulation. This paper proposes a standard approach for detailed performance analysis of parallel discrete event simulation. We developed it for our conservative simulation algorithm, but it can serve for parallelisation in general as well. The parallel overhead terms are introduced and model-dependency of the parallel speedup is expressed by the performance factors. Experimental results show that this analysis can serve for speedup bottleneck detection. We propose this approach as a workplan for in-depth investigation of the performance (performance prediction, scalability analysis and algorithm comparison).

Cited by 7

Performance Factors in Parallel Discrete Event Simulation

Erik Dirkx · 2001

Performance is a key issue in parallel simulation. This paper proposes a standard approach for detailed performance analysis of parallel discrete event simulation. We developed it for our conservative simulation algorithm, but it can serve for parallelisation in general as well. The parallel overhead terms are introduced and model-dependency of the parallel speedup is expressed by the performance factors. Experimental results show that this analysis can serve for speedup bottleneck detection. We propose this approach as a workplan for in-depth investigation of the performance (performance prediction, scalability analysis and algorithm comparison).

Cited by 0