检索结果-南通市图书馆

Journal of Central south University 2017年第3期24卷 569-588页

作者： M.Mohammadi M.Montazeri s.abasi Department of Electrical Engineering Borujerd Branch Islamic Azad University Borujerd Iran

This study proposes a graphical user interface(GUI) based on an enhanced bacterial foraging optimization(EBFO) to find the optimal locations and sizing parameters of multi-type DFACTs in large-scale distribution *** proposed GUI based toolbox,allows the user to choose between single and multiple DFACTs allocations,followed by the type and number of them to be *** EBFO is then applied to obtain optimal locations and ratings of the single and multiple *** is found to be faster and provides more accurate results compared to the usual PsO and *** obtained with MATLAB/simulink simulations are compared with PsO,BFO and enhanced *** reveals that enhanced BFO shows quick convergence to reach the desired solution there by yielding superior solution *** results concluded that the EBFO based multiple DFACTs allocation using DsssC,APC and DsTATCOM is preferable to reduce power losses,improve load balancing and enhance voltage deviation index to 70%,38% and 132% respectively and also it can improve loading factor without additional power loss.

关键词： distribution system power quality single type and multiple type DFACTs BFO algorithm particle swarm optimization(PsO)

Damage detection of 3D structures using nearest neighbor search method

在线全文

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2021年第3期20卷 705-725页

作者： Ali abasi Vahid Harsij Ahmad soraghi Department of Civil and Environmental Engineering Western UniversityLondonONCanada Department of Civil Engineering Amirkabir University of Technology(Tehran Polytechnic)TehranIran Department of Civil Engineering University of AkronASEC 210Sumner StAkronOH 44325USA

An innovative damage identification method using the nearest neighbor search method to assess 3D structures is *** frequency response function was employed as the input parameters to detect the severity and place of damage in 3D spaces since it includes the most dynamic characteristics of the ***-dimensional principal component analysis was utilized to reduce the size of the frequency response function *** nearest neighbor search method was employed to detect the severity and location of damage in different damage *** accuracy of the approach was verified using measured data from an experimental test;moreover,two asymmetric 3D numerical examples were considered as the numerical *** superiority of the method was demonstrated through comparison with the results of damage identification by using artificial neural *** levels of white Gaussian noise were used for polluting the frequency response function data to investigate the robustness of the methods against noise-polluted *** results indicate that both methods can efficiently detect the damage properties including its severity and location with high accuracy in the absence of noise,but the nearest neighbor search method is more robust against noisy data than the artificial neural network.

关键词： damage identification damage index frequency response function two-dimensional principal component analysis nearest neighbor search artificial neural network white Gaussian noise

Fuzzy-GA based algorithm for optimal placement and sizing of distribution static compensator (DsTATCOM) for loss reduction of distribution network considering reconfiguration

在线全文

学校读者我要写书评

暂无评论

Journal of Central south University 2017年第2期24卷 245-258页

作者： Mohammad Mohammadi Mahyar abasi A.Mohammadi Rozbahani Department of Electrical Engineering Borujerd Branch Islamic Azad University

This work presents a fuzzy based methodology for distribution system feeder reconfiguration considering DsTATCOM with an objective of minimizing real power loss and operating cost. Installation costs of DsTATCOM devices and the cost of system operation, namely, energy loss cost due to both reconfiguration and DsTATCOM placement, are combined to form the objective function to be minimized. The distribution system tie switches, DsTATCOM location and size have been optimally determined to obtain an appropriate operational condition. In the proposed approach, the fuzzy membership function of loss sensitivity is used for the selection of weak nodes in the power system for the placement of DsTATCOM and the optimal parameter settings of the DFACTs device along with optimal selection of tie switches in reconfiguration process are governed by genetic algorithm(GA). simulation results on IEEE 33-bus and IEEE 69-bus test systems concluded that the combinatorial method using DsTATCOM and reconfiguration is preferable to reduce power losses to 34.44% for 33-bus system and to 45.43% for 69-bus system.

关键词： distribution FACTs (DFACTs) distribution static compensator (DsTATCOM) network reconfiguration genetic algorithm fuzzy membership function power loss reduction

Influence of zeolite and cement additions on mechanical behavior of sandy soil

在线全文

学校读者我要写书评

暂无评论

Journal of Rock Mechanics and Geotechnical Engineering 2016年第5期8卷 746-752页

作者： Hossein Mola-abasi Issa shooshpasha Geotechnical Department Babol University of Technology

It is well known that the cemented sand is one of economic and environmental topics in soil stabilization. In this instance, a blend of sand, cement and other materials such as fiber, glass, nanoparticle and zeolite can be commercially available and effectively used in soil stabilization in road construction. However, the influence and effectiveness of zeolite on the properties of cemented sand systems have not been completely explored. In this study, based on an experimental program, the effects of zeolite on the characteristics of cemented sands are investigated. stabilizing agent includes Portland cement of type II and zeolite. Results show the improvements of unconfined compressive strength （UCs） and failure properties of cemented sand when the cement is replaced by zeolite at an optimum proportion of 30% after 28 days. The rate of strength improvement is approximately between 20% and 78%. The efficiency of using zeolite increases with the increases in cement amount and porosity. Finally, a power function of void-cement ratio and zeolite content is demonstrated to be an appropriate method to assess UCs of zeolite-cemented mixtures.

关键词： ZeoliteCemented sand strengthUnconfined compressive strength (UCs) Void-cement ratio

The relative frequency of Mycobacterium tuberculosis and Mycobacterium avium infections in HIV positive patients,Ahvaz,Iran

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2012年第1期5卷 71-74页

作者： Khosravi AD seyed Mohammad Alavi Hashemzade M abasi E seghatoleslami s Department of Microbiology School of MedicineAhvaz Jundishapur University of Medical Sciences(AJUMS)AhvazIran Infectious and Tropical Diseases Research Center AJUMSAhvazIran Infectious Diseases Ward Razi Teaching HospitalAJUMSAhvazIran

Objective:To estimate the prevalence of Mycobacterium tuberculosis(***) and Mycobacterium avium(***) infections in HIV -positive patients suspected to have puimonar) and extrapulmonary mycobacterial co-infection using PCR ***: Totally 50 samples comprising sputum,pleural fluid and CsF taken from HIV positive patients suspected to have mycobacterial infection,were *** demographic information and results of acid fast staining and culture were recorded for each *** PCR for detecting of *** comprised of specific primers targeting Is6110 gene *** detecting of ***,PCR with primers that amplifies the mig gene were ***:From 50 samples processed,45 were sputum(90%),3 pleural fluid(6%) and 2 CsK(4%).In total.8(16%) were culture positive,7 had positive acid fast staining 114%) and 13 samples(26%)were positive using PCR *** the positive samples were sputum and belonged to patients with pulmonary infection.01 these.9 were positive for ***(69.2%) and 4 were identified as 1/.avium (30.8%).which 2 out of 13 positive samples showed mixed infections by both mycobacteria. Conclusions:The PCR shows the highest detection rate(26%) of mycobacteria compared with culture and acid last *** majority of infections were with ***(18%) and this shows the importance of this mycobacterial co-infection in HIV positive patients in the region of study.

关键词： Mycobacterium tuberculosis Mycobacterium avium HIV positive PCR

Crucial role of charge transporting layers on ion migration in perovskite solar cells

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2020年第8期29卷 132-137,I0005页

作者： abasi Abudulimu Lang Liu Guilin Liu Nijiati Aimaiti Bohuslav Rezek Qi Chen Faculty of Electrical Engineering Czech Technical UniversityPragueCzechia school of Materials and Engineering Beijing Institute of TechnologyBeijing 102488China school of science Jiangnan UniversityWuxi 214122JiangsuChina IMDEA Nanociencia Madrid 28049Spain

The device preconditioning dependent hysteresis and the consequential performance degradation hinder the actual performance and stability of the perovskite solar cells. Ion migration and charge trapping in the perovskite with large contribution from grain boundaries are the most common interpretations for the hysteresis. Yet, the high performing devices often include intermediate hole and electron transporting layers, which can further complicate the dynamical process in the device. Here, by using Kelvin Probe Force Microscopy and Confocal Photoluminescence Microscopy, we elucidate the impact of chargetransporting layers and excess MAI on the spatial and temporal variations of the photovoltage on the MAPbI3-based solar cells. By studying the devices layer by layer, we found that the light-induced ion migration occurs predominantly in the presence of an imbalanced charge extraction in the solar cells, and the charge transporting layers play crucial role in suppressing it. Careful selection and processing of the electron and hole-transporting materials are thus essential for making perovskite solar cells free from the ion migration effect.

关键词： Perovskite solar cells Ion migration KPFM Charge transporting material

One-pot synthesis of pyrrolo[1,2-a]pyrazines via three component reaction of ethylenediamine,acetylenic esters and nitrostyrene derivatives

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2013年第8期24卷 740-742页

作者： Loghman Moradi Mohammad Piltan Hedieh Rostami Golaleh abasi Department of Chemistry Faculty of ScienceUniversity of Kurdistan Young Researches Club Sanandaj BranchIslamic Azad University

An effective route to pyrrolo[1,2-a]pyrazines is described via reaction of ethylenediamine,acetylenic esters and nitrostyrene derivatives in the presence of 20 mol%of sulfamic acid.

关键词： Pyrrolo[1 2-a]pyrazines Ethylenediamine Acetylenic esters Nitrostyrene

Revisiting cerebral endothelial cells in Alzheimer’s disease

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第10期20卷 2911-2912页

作者： Amira s.Hanafy Department of Neurosurgery University Hospital BonnBonnGermany

Alzheimer’s disease(AD)is the most common neurodegenerative disorder characterized by slow and progressive decline of cognitive and memory *** only approximately 5%of the cases,AD is familial,as often predisposed by genetic mutations(Hoogmartens et al.,2021),while sporadic AD accounts for approximately 95%of the *** amyloid cascade hypothesis is one of the fundamental hypotheses put out to explain AD pathogenesis as dysregulated homeostasis of amyloid-β(Aβ)peptides that leads to the accumulation of Aβplaques in the parenchyma,an anatomical hallmark of AD.

关键词： Alzheimer Aβ cerebral

A systematic review of progenitor survival and maturation in Parkinsonian models

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第11期20卷 3172-3178页

作者： Giulia Comini Eilís Dowd Pharmacology&Therapeutics and Galway Neuroscience Center University of GalwayGalwayIreland

stem cell-based brain repair is a promising emergent therapy for Parkinson's disease based on years of foundational research using human fetal donors as a cell *** current therapeutic options for patients,this approach has the potential to provide longterm stem cell–derived reconstruction and restoration of the dopaminergic input to denervated regions of the brain allowing for restoration of certain functions to *** ultimate clinical success of stem cell–derived brain repair will depend on both the safety and efficacy of the approach and the latter is dependent on the ability of the transplanted cells to survive and differentiate into functional dopaminergic neurons in the Parkinsonian *** the pre-clinical literature suggests that there is considerable variability in survival and differentiation between studies,the aim of this systematic review was to assess these parameters in human stem cell-derived dopaminergic progenitor transplant studies in animal models of Parkinson's disease.A defined systematic search of the PubMed database was completed to identify relevant studies published up to March *** screening,76 articles were included in the analysis from which 178 separate transplant studies were *** these,graft survival could be assessed in 52 studies and differentiation in 129 ***,we found that graft survival ranged froms transplanted,with a median of 51%of transplanted cells surviving in the brain;while dopaminergic differentiation of the cells ranged from 0% to 46% of cells transplanted with a median of 3%.This systematic review suggests that there is considerable scope for improvement in the differentiation of stem cell-derived dopaminergic progenitors to maximize the therapeutic potential of this approach for patients.

关键词： cell replacement therapy differentiation embryonic stem cells graft induced pluripotent stem cells Parkinson's disease survival transplant

Deciphering the mechanobiology of microglia in traumatic brain injury with advanced microsystems

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第8期20卷 2304-2306页

作者： Anthony Procès sylvain Gabriele Univ.Grenoble Alpes InsermU1216Grenoble Institut des NeurosciencesGrenobleFrance Mechanobiology&Biomaterials Group CIRMAPResearch Institute for BiosciencesUniversity of MonsMonsBelgium

Advanced microsystems in traumatic brain injury research:Traumatic brain injury(TBI)results from a mechanical insult to the brain,leading to neuronal and axonal damage and subsequently causing a secondary *** minutes ... 详细信息

关键词： traumatic injury damage