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Robustness and Iterative Reconstruction of g-Fusion Frames in Hilbert Spaces

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Journal of Mathematical Research with Applications 2021年第3期41卷 270-278页

作者： vahid SADRI Department of Mathematics Faculty of Tabriz Branch Technical and Vocational University (TVU)

Regarding the application of the fusion frames and generalization of them in data proceeding, their iterative is of particular importance when one of their members is deleted. In this note, a method for reconstruction of generalized fusion frames and error operator with its upper bound are presented. Also, the approximation operator for these frames will be introduced and we study some results about them.

关键词： Parseval frame $g$-frame $g$-fusion frame

Towards climate resilient urban energy systems: a review

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National Science Review 2021年第3期8卷 159-176页

作者： vahid M.Nik A.T.D.Perera Deliang Chen Division of Building Physics Department of Building and Environmental Technology Lund University Institute for Future Environments(IFE) Queensland University of Technology(QUT) Regional Climate Group Department of Earth SciencesUniversity of Gothenburg Division of Building Technology Department of Architecture and Civil Engineering Chalmers University of Technology Solar Energy and Building Physics Laboratory(LESO-PB) Ecole Polytechnique Federale de Lausanne(EPFL) Urban Energy Systems Laboratory

Climate change and increased urban population are two major concerns for *** towards more sustainable energy solutions in the urban context by integrating renewable energy technologies supports decarbonizing the energy sector and climate change mitigation.A successful transition also needs adequate consideration of climate change including extreme events to ensure the reliable performance of energy systems in the long *** review provides an overview of and insight into the progress achieved in the energy sector to adapt to climate change,focusing on the climate resilience of urban energy *** state-of-the-art methodology to assess impacts of climate change including extreme events and uncertainties on the design and performance of energy systems is described and *** resilience is an emerging concept that is increasingly used to represent the durability and stable performance of energy systems against extreme climate ***,it has not yet been adequately explored and widely used,as its definition has not been clearly articulated and assessment is mostly based on qualitative *** study reveals that a major limitation in the state-of-the-art is the inadequacy of climate change adaptation approaches in designing and preparing urban energy systems to satisfactorily address plausible extreme climate ***,the complexity of the climate and energy models and the mismatch between their temporal and spatial resolutions are the major limitations in linking these ***,few studies have focused on the design and operation of urban energy infrastructure in terms of climate *** the occurrence of extreme climate events and increasing demand for implementing climate adaptation strategies,the study highlights the importance of improving energy system models to consider future climate variations including extreme events to identify climate resilient energy transition pathways.

关键词： climate resilience climate change adaptation urban energy systems renewable energy extreme events decentralized generation

Are women more susceptible to ischemic heart disease compared to men? A literature overview

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Journal of Geriatric Cardiology 2021年第4期18卷 289-296页

作者： Masoud Majidi vahid Eslami Pardis Ghorbani Mahnoosh Foroughi Clinical Research and Development Center Shahid Modarres HospitalShahid Beheshti University of Medical SciencesTehranIran Cardiovascular Research Center Shahid Beheshti University of Medical SciencesTehranIran

Ischemic heart disease(IHD) is known as the leading cause of death in both genders. Moreover, significant sex differences were found in cardiac structure, function, pathophysiology, presentation, treatment, and outcome of IHD. The presence of unique risk factors such as exposure to menarche and pregnancy, more anemia, hypertension, and autoimmune disorders in women have recently received attention. Ischemic symptoms are more indefinite and vague in women compared to men as well as a delay in diagnosis, treatment, and worse outcomes compared to men. Women usually receive less evidence-based treatment and intervention, with less concern on preventive health care. Clinical trials primarily recruit male patients and women are underrepresented. Without any correct diagnosis, treatment, and prevention, these problems are accumulated and continue up to older age. Accordingly, with the belief of longer life in women and the increased prevalence of IHD with aging, it will become an important public health problem and concern in the future. This narrative review aimed to provide an overview of some of the differences between the two genders in terms of IHD with paying more attention to practical points.

关键词： IHD presentation A literature overview Are women more susceptible to ischemic heart disease compared to men

Highly sensitive determination of promazine in pharmaceutical and biological samples using a ZnO nanoparticle-modified ionic liquid carbon paste electrode

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Chinese Chemical Letters 2016年第5期27卷 779-782页

作者： vahid Arabali Mahmoud Ebrahimi Hassan Karimi-Maleh Department of Chemistry Mashhad Branch Islamic Azad University Mashhad Iran Department of Chemistry Graduate University of Advanced Technology Kerman Iran

In this work we describe the first report for the determination of promazine using a nanostructure- modified ionic liquid carbon paste electrode in aqueous solutions. To achieve this goal, a novel modified carbon paste electrode using ZnO nanoparticles and l-methyl-3-butylimidazolium bromide as a binder （ZnO/NPs/ILs/CPE） was fabricated. The oxidation peak potential of promazine at the surface of the ZnO/ NPs/ILs/CPE appeared at 685 mV, which was about 65 mV lower than the oxidation potential at the surface of CPE under similar conditions. Also, the peak current was increased to about 4.0 times higher at the surface of ZnO/NPs/ILs/CPE compared to that of CPE. The linear response range and detection limit were found to be 0.08-450 and 0.04 μmol/L, respectively. The modified electrode was successfully used for the determination of promazine in real samples with satisfactory results.

关键词： Promazine ZnO nanoparticle Ionic liquid Modified electrode

An MCDM approach to assessing influential factors on healthcare providers’safe performance during the COVID-19 pandemic:Probing into demographic variables

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Journal of Safety Science and Resilience 2023年第3期4卷 274-283页

作者： vahid Salehi Gholamreza Moradi Leila Omidi Elnaz Rahimi Faculty of Engineering and Applied Science Memorial University of NewfoundlandSt.John'sCanada Health and Environment Research Center Tabriz University of Medical SciencesTabrizIran Department of Occupational Health Engineering School of HealthTabriz University of Medical SciencesTabrizIran Department of Occupational Health Engineering School of Public HealthTehran University of Medical SciencesTehranIran

This study assessed the influence of occupational stress,individual resilience,and organizational resilience on the safety performance of healthcare providers during the COVID-19 *** variables including age,work experience,and gender were *** were collected from 344 healthcare providers employed at a teaching *** entropy method and the multi-criteria decision-making(MCDM)method were used to examine the influence of occupational stress,individual resilience,and organizational resilience on the safe performance of healthcare *** results of the entropy method showed that organizational resilience was the most influential factor in the safe performance of older healthcare *** contrast,individual resilience was the most significant factor in enhancing the safety performance of younger healthcare *** of work experience indicated that individual resilience was the most influential factor in the safe performance of less experienced healthcare ***-based analysis revealed that individual resilience had a major effect on the safety performance of both women and *** findings of this study could assist managers in improving the performance of the healthcare sector during pandemics by using and implementing resilience concepts at both the individual and organizational levels.

关键词： COVID-19 pandemic Safe performance Individual resilience Organizational resilience Demographic variables Entropy method

QUANTITATIVE EVALUATION OF ARRANGEMENT OF MONOMERS IN LINEAR BINARY COPOLYMERS USING A MONTE CARLO SIMULATION METHOD

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Chinese Journal of Polymer Science 2009年第2期27卷 195-208页

作者： Mohammad Najafi Mehdi Salami-Kalajahi vahid Haddadi-Asl Polymer Engineering Department Amirkabir University of TechnologyP.O.Box 15875-4413TehranIran National Petrochemical Company Petrochemical Research and Technology Company14358TehranIran

A Monte Carlo method was used to take thorough account of the influences of different reactivity ratios and initial feed compositions on copolymer *** model proves the lack of azeotropic behavior in systems in which r_A>1 and r_B<1 or vice versa;it is also able to calculate the drift in the copolymer properties:copolymer composition,and randomness ***,for each reactivity ratio pair given,there is a unique reaction conversion,at which macromolecules produced inherit their ...

关键词： Radical copolymerization Copolymer microstructure Copolymer composition Monte Carlo simulation Randomness parameter Copolymer heterogeneity Azeotrope point.

Asymptotic Behavior of Product of Two Heavy-tailed Dependent Random Variables

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Acta Mathematica Sinica,English Series 2013年第2期29卷 355-364页

作者： vahid RANJBAR Mohammad AMINI Jaap GELUK Abolghasem BOZORGNIA Department of Statistics Faculty of SciencesGolestan University Department of Statistics Ordered and Spatial Data Center of ExcellenceFerdowsi University of Mashhad Department of Mathematics The Petroleum Institute

Let X and Y be positive weakly negatively dependent （WND） random variables with finite expectations and continuous distribution functions F and G with heavy tails, respectively. The asymptotic behavior of the tail of distribution of XY is studied and some closure properties under some suitable conditions on F（x） = 1-F（x） and G（x） = of XY when X and Y are WND random variables 1- G（x） are provided. Moreover, subexponentiality is derived.

关键词： Weakly negative dependent heavy-tailed asymptotic behavior

Application of different clustering approaches to hydroclimatological catchment regionalization in mountainous regions, a case study in Utah State

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Journal of Mountain Science 2018年第3期15卷 461-484页

作者： Elnaz SHARGHI vahid NOURANI Saeed SOLEIMANI Fahreddin SADIKOGLU Department of Water Resources Engineering Faculty of Civil Engineering University of Tabriz Department of Civil Engineering Near East University Department of Electrical and Electronic Engineering Near East University

With respect to the different hydrological responses of catchments, even the adjacent ones, in mountainous regions, there are a great number of motivations for classifying them into homogeneous clusters. These motivations include prediction in ungauged basins(PUB), model parameterization, understanding the potential impact of environmental changes, transferring information from gauged catchments to the ungauged ones. The present study investigated the similarity of catchments through the hydro-climatological pure time-series of a 14-year period from 2001 to 2015. Data sets encompass more than 13,000 month-station streamflow, rainfall, and temperature data obtained from 27 catchments in Utah State as one of the eight mountainous states of the USA. The identification, analysis, and interpretation of homogeneous catchments were investigated by applying the four approaches ofclustering, K-means, Ward, and SOM(Self-Organized Map) and a newly proposed Wavelet-Entropy-based(WE-SOM) clustering method. By using two clustering evaluation criteria, 3, 5, and 6 clusters were determined as the best numbers of clusters, depending on the method employed, where each cluster represents different hydro-climatological behaviors. Despite the absence of geographic characteristics in input data matrix, the results indicated a regionalization in agreement with topographic characteristics. Considering the dependency of the hydrological behavior of catchments on the physiographic field aspects and characteristics, WE-SOM method demonstrated a more acceptable performance, compared to the other three conventional clustering methods, by providing more clusters. WE-SOM appears to be a promising approach in catchment clustering. It preserves the topological structure of data which can, as a result, be proofed in a greater number of clusters by dividing data into higher numbers of distinct clusters withsimilar altitudes of catchments in each cluster. The results showed the aptitude of wavelets to

关键词： Catchment clustering K-means Ward Self-Organized Map Wavelet–Entropy Utah

A new hybrid control technique for operation of DC microgrid under islanded operating mode

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Protection and Control of Modern Power Systems 2022年第1期7卷 646-656页

作者： vahid Mortezapour Sajjad Golshannavaz Edris Pouresmaeil Amin Yazdaninejadi School of Electrical and Computer Engineering University of Tehran16th Azar St.Enghelab Sq.TehranIran Electrical Engineering Department Urmia University11Km SERO RoadUrmia CityIran Department of Electrical Engineering and Automation Aalto UniversityAalto University Foundation srPO BOX 11000FI-00076 AaltoFinland Department of Electrical Engineer-ing Shahid Rajaee Teacher Training UniversityShabanlouQFJR+2MPTehranTehran ProvinceIran.

This study proposes a novel combined primary and secondary control approach for direct current microgrids,specifi-cally in islanded *** primary control,this approach establishes an appropriate load power sharing between the distributed energy resources based on their rated ***,it considers the load voltage deviation and provides satisfactory voltage regulation in the secondary control *** proposed primary control is based on an efficient droop mechanism that only deploys the local variable measurements,so as to overcome the side effects caused by communication *** the case of secondary control,two different methods are *** the first,low bandwidth communication links are used to establish the minimum required data transfer between the *** effect of communication delay is further *** second method excludes any communication link and only uses local ***,a self-sufficient control loop is devised without any communication *** proposed control notions are investigated in MATLAB/Simulink platform to highlight system *** results demonstrate that both proposed approaches can effectively compensate for the voltage deviation due to the primary control *** comparisons of the two methods are also provided.

关键词： Hybrid control technique Modern power system DC microgrid Islanded operating mode