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Dynamic task scheduling modeling in unstructured heterogeneous multiprocessor systems

Journal of Zhejiang University-Science C(Computers and Electronics) 2014年第6期15卷 423-434页

作者： hamid tabatabaee Mohammad Reza AKBARZADEH-T Naser PARIZ Department of Computer Engineering Islamic Azad University Center of Excellence on Soft Computing and Intelligent Information Processing Ferdowsi University of Mashhad Department of Electrical Engineering Ferdowsi University of Mashhad

An algorithm is proposed for scheduling dependent tasks in time-varying heterogeneous multiprocessor systems, in which computational power and links between processors are allowed to change over time. Link contention is considered in the multiprocessor scheduling problem. A linear switching-state space-modeling paradigm is introduced to enable theoretical analysis from a system engineering perspective. Theoretical analysis of this model shows its robustness against changes in processing power and link failure. The proposed algorithm uses a fuzzy decision-making procedure to handle changes in the multiprocessor system. The efficiency of the proposed algorithm is illustrated by several random experiments and comparison against a recent benchmark approach. The results show up to 18% average improvement in makespan, especially for larger scale systems.

关键词： Dynamic task scheduling Fuzzy logic Genetic algorithms Unstructured environment Linear switching state space

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Forecasting the number of zoonotic cutaneous leishmaniasis cases in south of Fars province, Iran using seasonal ARIMA time series method

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Asian Pacific Journal of Tropical Medicine 2017年第1期10卷 77-83页

作者： Mehdi Sharafi Haleh Ghaem hamid Reza tabatabaee Hossein Faramarzi Student Research Committee Shiraz University of Medical Sciences Research Center for Health Sciences Department of EpidemiologySchool of HealthShiraz University of Medical Sciences infectious diseases assistant professor of department of community medicine Medical School Shiraz University of Medical Sciences

Objective: To predict the trend of cutaneous leishmaniasis and assess the relationship between the disease trend and weather variables in south of Fars province using Seasonal Autoregressive Integrated Moving Average(SARIMA) model,Methods: The trend of cutaneous leishmaniasis was predicted using Mini tab software and SARIMA model,Besides,information about the disease and weather conditions was collected monthly based on time series design during January 2010 to March 2016,Moreover,various SARIMA models were assessed and the best one was selected,Then,the model's fitness was evaluated based on normality of the residuals' distribution,correspondence between the fitted and real amounts,and calculation of Akaike Information Criteria(AIC) and Bayesian Information Criteria(BIC),Results: The study results indicated that SARIMA model(4,1,4)(0,1,0)(12) in general and SARIMA model(4,1,4)(0,1,1)(12) in below and above 15 years age groups could appropriately predict the disease trend in the study area,Moreover,temperature with a three-month delay(lag3) increased the disease trend,rainfall with a four-month delay(lag4) decreased the disease trend,and rainfall with a nine-month delay(lag9) increased the disease trend,Conclusions: Based on the results,leishmaniasis follows a descending trend in the study area in case drought condition continues,SARIMA models can suitably measure the disease trend,and the disease follows a seasonal trend.

关键词： SARIMA model Zoonotic cutaneous leishmaniasis Time series analysis

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Erratum to: Dynamic task scheduling modeling in unstructured heterogeneous multiprocessor systems

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Journal of Zhejiang University-Science C(Computers and Electronics) 2014年第7期15卷 592-592页

作者： hamid tabatabaee Mohammad Reza AKBARZADEH-T Naser PARIZ Department of Computer Engineering Quchan Branch Islamic Azad University Center of Excellence on Soft Computing and Intelligent Information Processing Ferdowsi University of Mashhad Department of Electrical Engineering Ferdowsi University of Mashhad

The original version of this article unfortunately contained a mistake. The affiliation of the first author was incorrect. The correct affiliation is: Department of Computer Engineering, Quchan Branch, Islamic Azad Un... 详细信息

关键词： scheduling unstructured contained mistake heterogeneous correct

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A Novel Approach for Energy and Water Conservation by Using Silver-Carbon Quantum Dots Hybrid Nanofluids in Wet Cooling Towers Systems

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Journal of Thermal Science 2021年第5期30卷 1827-1841页

作者： hamid Mousavi SEYED MOSTAFA tabatabaee Ghomshe ALIMORAD Rashidi MASOUMEH Mirzaei Department of Chemical Engineering Mahshahr BranchIslamic Azad UniversityMahshahrIran Nanotechnology Research Center Research Institute of Petroleum Industry(RIPI)West Blvd.Azadi Sports ComplexP.O.Box 146651998TehranIran

This study presents the use of Silver-Carbon Quantum Dots(Ag-CQD)hybrid nanofluids,prepared by a facile wet chemical method,for heat transfer enhancement of wet cooling towers *** samples were characterized using different analyses,including FT-IR,XRD and *** synthesizing the CQD,it was hybridized with silver nanoparticles and dispersed in water,using ultrasonic *** viscosity and density of the prepared nanofluid were investigated as a function of temperature and nanoparticles concentration,which demonstrated that there were no noticeable changes at lower particles ***,thermal conductivity and convective heat transfer coefficient were measured to evaluate the heat transfer enhancement of the *** 45℃ and 0.5 wt%,the most significant thermal conductivity improvement compared to the base fluid was 24%;and 28%enhancement of the heat transfer coefficient was obtained at Reynolds number of *** nanofluid performance was evaluated in a wet cooling tower for investigating the efficiency and water consumption *** results indicated that the efficiency of the cooling tower,by applying Ag-CQD nanofluid,enhanced from 23.72%to 28.23%;consequently,the amount of the consumed water decreased from 80.76 mL·min^(−1)to 69.67 mL·min^(−1).The results proved that the prepared nanofluid is a successful and promising candidate to enhance heat transfer.

关键词： nanofluid carbon quantum dot silver hybrid heat transfer wet cooling tower

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