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Evaluation the Properties of Polycaprolactone/Fluorapatite Nano-biocomposite

Journal of Bionic Engineering 2022年第1期19卷 179-187页

作者： Mojtaba Momeni Kamran Amini Ali heidari Mohammad Khodaei Department of Mechanical Engineering Khomeinishahr BranchIslamic Azad UniversityKhomeinishahr84181-48499IsfahanIran Center for Advanced Engineering Research Majlesi BranchIslamic Azad University86316-56451IsfahanIran Materials Engineering Group Golpayegan College of EngineeringIsfahan University of Technology87717-67498GolpayeganIran

In this study,nano-biocomposites of polycaprolactone(PCL)as the matrix and different amounts of nanofluorapatite(nFA)(0,10,20 and 30 wt.%)as the reinforcement were prepared for possible scaffold fabrication using the fused filament fabrication(FFF)3D *** Emission Scanning Electron Microscopy(FE-SEM)and Energy Dispersive Spectroscopy(EDS)showed that nFA particles were well distributed in the PCL matrix.X-ray diffraction analysis(XRD)and Fourier Transform Infrared Spectroscopy(FTIR)depicted no chemical interaction between the elements of the *** Scanning Calorimetric(DSC)analysis was then used to assess the thermal properties of the composites,suggesting that this could be due to the amorphous phase formation of the intermolecular hydrogen bonds between PCL and nFA,resulting in the suppression of PCL *** results of mechanical characterization also showed that the addition of nFA up to 20 wt.%to the PCL increased the tensile and yield strength,as well as reducing the elongation at both yield and failure points and increasing the Young *** best mechanical properties were obtained for the PCL/20nFA *** strength and Young modulus were increased by 30%and 179%,respectively;meanwhile,elongation of PCL/20nFA was decreased by 70%,as compared to the naked *** changes could be attributed to the better distribution of the nFA filler in the PCL *** to the obtained results,PCL/20nFA could be regarded as a good composite in terms of the mechanical properties for the regeneration of the bone tissue.

关键词： Nano-biocomposite Polycaprolactone Fluorapatite Bone tissue engineering Mechanical properties

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Parametric analysis of steel plated shear structures

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Journal of Central South University 2014年第5期21卷 2083-2090页

作者： M.Ghassemieh N.heidari School of Civil Engineering University of Tehran

Due to outstanding ductility and high strength,the steel plate shear wall(SPSW)is recognized as a good lateral system for building structures; particularly as it interacts with earthquake resistant *** study aims to reveal the dynamic and cyclic behavior of steel plated shear *** element method of analysis was implemented in order to simulate the behavior of such a wall *** determine the dynamic behavior of un-stiffened plate shear wall,two different analytical models were *** post buckling strength of steel plate subjected to lateral loading was also *** story shear-drift diagrams of steel shear wall system were *** strength and ductility of the system obtained from the analysis were compared with those of steel shear wall tests reported *** pertinent parameters of the steel shear wall system such as plate thickness,column and beam stiffness and the plate aspect ratio were recognized and their effects were *** effect of stiffeners on the behavior of the SPSW was also investigated.

关键词： steel shear wall pushover analysis energy dissipation ductility post buckling behavior Strut element

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Theoretical and experimental study on the fluidity performance of hard-to-fluidize carbon nanotubes-based CO_(2) capture sorbents

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Frontiers of Chemical Science and Engineering 2022年第10期16卷 1460-1475页

作者： Mahsa Javidi Nobarzad Maryam Tahmasebpoor Mohammad heidari Covadonga Pevida Faculty of Chemical&Petroleum Engineering University of TabrizTabriz 51666-16471Iran Instituto de Ciencia y Tecnología del Carbono INCAR-CSICOviedo 33011Spain

Carbon nanotubes-based materials have been identified as promising sorbents for efficient CO_(2)capture in fluidized beds,suffering from insufficient contact with CO_(2)for the high-level CO_(2)capture *** study focuses on promoting the fluidizability of hard-to-fluidize pure and synthesized silica-coated amine-functionalized carbon *** novel synthesized sorbent presents a superior sorption capacity of about 25 times higher than pure carbon nanotubes during 5 consecutive adsorption/regeneration *** low-cost fluidizable-SiO_(2)nanoparticles are used as assistant material to improve the fluidity of carbon nanotubes-based *** reveal that a minimum amount of 7.5 and 5 wt%SiO_(2)nanoparticles are required to achieve an agglomerate particulate fluidization behavior for pure and synthesized carbon nanotubes,*** carbon nanotubes+7.5 wt%SiO_(2)and synthesized carbon nanotubes+5 wt%SiO_(2)indicates an agglomerate particulate fluidization characteristic,including the high-level bed expansion ratio,low minimum fluidization velocity(1.5 and 1.6 cm·s^(–1)),high Richardson−Zaki n index(5.2 and 5.3>5),and lowΠvalue(83.2 and 84.8<100,respectively).Chemical modification of carbon nanotubes causes not only enhanced CO_(2)uptake capacity but also decreases the required amount of silica additive to reach a homogeneous fluidization behavior for synthesized carbon nanotubes sorbent.

关键词： CO_(2) capture CNT-based sorbents fluidization SiO_(2) nanoparticles fluidized bed reactors

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Multi-verse Optimizer with Rosenbrock and Diffusion Mechanisms for Multilevel Threshold Image Segmentation from COVID-19 Chest X-Ray Images

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Journal of Bionic Engineering 2023年第3期20卷 1198-1262页

作者： Yan Han Weibin Chen Ali Asghar heidari Huiling Chen Department of Computer Science and Artificial Intelligence Wenzhou UniversityWenzhou325035China School of Surveying and Geospatial Engineering College of EngineeringUniversity of TehranTehranIran

Coronavirus Disease 2019(COVID-19)is the most severe epidemic that is prevalent all over the *** quickly and accurately identifying COVID-19 is of great significance to controlling the spread speed of the ***,it is essential to accurately and rapidly identify COVID-19 lesions by analyzing Chest X-ray *** we all know,image segmentation is a critical stage in image processing and *** achieve better image segmentation results,this paper proposes to improve the multi-verse optimizer algorithm using the Rosenbrock method and diffusion mechanism named *** utilizes RDMVO to calculate the maximum Kapur’s entropy for multilevel threshold image *** image segmentation scheme is called *** ran two sets of experiments to test the performance of RDMVO and ***,RDMVO was compared with other excellent peers on IEEE CEC2017 to test the performance of RDMVO on benchmark ***,the image segmentation experiment was carried out using RDMVO-MIS,and some meta-heuristic algorithms were selected as *** test image dataset includes Berkeley images and COVID-19 Chest X-ray *** experimental results verify that RDMVO is highly competitive in benchmark functions and image segmentation experiments compared with other meta-heuristic algorithms.

关键词： COVID-19 Multilevel threshold image segmentation Kapur’s entropy Multi-verse optimizer Meta-heuristic algorithm Bionic algorithm

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Estimation of environmental effects of photovoltaic generation in North-west China

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Frontiers in Energy 2013年第4期7卷 535-543页

作者： Mengjia REN anastasia SHCHERBAKOVA Energy and Mineral Engineering Department Pennsylvania State University University Park PA 16802 USA

In estimating emissions reductions brought about by renewables in China, much of existing research assumes that renewables displace coal power. In this paper, this assumption is challenged and the potential environmental effects of photovoltaic （PV） power in North-west China are reevaluated when the marginal generator actually being displaced is taken into account. The annual PV power generation in the North-west Grid is estimated, in this paper, to be as high as 17900GW.h in 2015, roughly equaling to the output of 1.5 nuclear power plants in the US today. The total associated emission reduction in 2015 will at most be 0.36 percent of SO2 and 0.25 percent of NOx emissions from their 2010 levels in China. Further, PV power may render no emissions reduction at all if it displaces hydropower, which is often used to meet peak demand in the North-west Grid in China. These results imply that a more cost-effective area of focus in the short- term may be on desulfurization and denitrification technologies for coal plants.

关键词： photovoltaic (PV) emission reduction North- west China marginal generator

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Interaction of water droplets with pyrolyzing coal particles and tablets

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Defence Technology（防务技术） 2023年第12期30卷 1-12页

作者： anastasia Islamova Pavel Tkachenko Pavel Strizhak National Research Tomsk Polytechnic University Heat and Mass Transfer Laboratory30 Lenin AvenueTomsk634050Russia

The paper presents the experimental research findings for the patterns of collisions of water droplets with pressed tableted samples used as substrates and with small particles of a pyrolyzing solid *** coal samples were ***-substrate interactions were studied when varying the droplet diameter in the range from 1 to 4 mm and velocity from 0.5 to 4 m/*** corresponded to the Weber number range of *** coal tablet surface temperature was varied from 20 to 700℃.In the interactions of water droplets(0.7-1.5 mm in diameter,pre-collision velocity from 1 to 3 m/s)with coal particles(with a size of 0.2-1 mm,pre-collision velocity 0.7-2 m/s),the temperature of the latter was varied in the range of 330-480℃.The following regimes of the interaction of droplets with solid particles during chemical reactions and phase transformations were distinguished:spreading/agglomeration and break-up/*** in the characteristics of the interaction of water droplets with coal particles at varying temperatures were ***-particle interaction regime maps for B(We),We(Oh)and We(Ca)were *** collision regime boundaries were described using fitted curves that can be utilized to develop the existing mathematical models of droplet-particle collisions in *** was established that the gaseous volatile production in coal pyrolysis has a modest effect on the regimes and characteristics of the droplet destruction in the temperature range under consideration(20-700℃).

关键词： Droplet Particle Solid substrate Collision Agglomeration Separation

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A hybrid LQR-PID control design for seismic control of buildings equipped with ATMD

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Frontiers of Structural and Civil Engineering 2018年第1期12卷 44-57页

作者： Amir Hossein heidari Sadegh ETEDALI Mohamad Reza JAVAHERI-TAFTI Department of Civil Engineering Taft Branch Islamic Azad University Taft Iran Department of Civil Engineering Birjand University of Technology P.O. Box 97175-569 Birjand Iran

This paper presents an efficient hybrid control approach through combining the idea of proportional- integral-derivative （PID） controller and linear quadratic regulator （LQR） control algorithm. The proposed LQR-PID controller, while having the advantage of the classical PID controller, is easy to implement in seismic-excited structures. Using an optimization procedure based on a cuckoo search （CS） algorithm, the LQR-PID controller is designed for a seismic- excited structure equipped with an active tuned mass damper （ATMD）. Considering four earthquakes, the performance of the proposed LQR-PID controller is evaluated. Then, the results are compared with those given by a LQR controller. The simulation results indicate that the LQR-PID performs better than the LQR controller in reduction of seismic responses of the structure in the terms of displacement and acceleration of stories of the structure.

关键词： eismic control tuned mass dampers cuckoo search PID controller LQR controller

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The RhoA nuclear localization changes in replicative senescence:New evidence from in vitro human mesenchymal stem cells studies

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BIOCELL 2022年第9期46卷 2053-2058页

作者： DANILA BOBKOV anastasia POLYANSKAYA anastasia MUSORINA GALINA POLJANSKAYA Collection of Vertebrate Cell Cultures Institute of CytologyRussian Academy of SciencesSt.Petersburg194064Russia Laboratory of Intracellular Signaling and Transport Smorodintsev Research Institute of InfluenzaSt.Petersburg197376Russia Research Laboratory of Translational Oncology Almazov National Research CentreSt.Petersburg197341Russia

All non-immortalized mesenchymal stem cells have a limited proliferative potential,that is,replicative senescence(RS)is an integral characteristic of the life of all mesenchymal stem cells(MSCs).It is known that one of the important signs of RS is a decrease of cell motility,and that violations of migration processes contribute to the deterioration of tissue ***,the characterization of the properties of the cell line associated with RS is a prerequisite for the effective use of MSCs in restorative *** of the key proteins regulating cell motility is the small GTPase *** main purpose of this work was to study the nuclear-cytoplasmic redistribution of the RhoA protein during RS in MSC lines recently obtained and characterized in our *** study found that a comparative analysis of the intracellular localization of RhoA in three cell lines(MSCWJ-1,FetMSC,DF2)showed a decrease in the nuclear localization of RhoA during RS.

关键词： Mesenchymal stem cells RhoA Actin cytoskeleton Replicative senescence

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MODELING AND FABRICATION OF A KINETIC SOLAR ENERGY-ABSORBING WINDOW AS A GREEN IDEA FOR SUSTAINABLE FUTURE BUILDINGS

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Journal of Green Building 2018年第2期13卷 147-162页

作者： Masoud Valinejadshoubi Mannan Ghanizadehgrayli Sahar heidari Elite Club Central Tehran BranchIslamic Azad UniversityTehranIran Elite Club Babol BranchIslamic Azad UniversityBabolIran Department of Architecture Shomal UniversityAmolIran

INTRODUCTION Renewable versus nonrenewable energy sources and their respective environmental impacts have emerged as preeminent industrial,as well as environmental *** between policies that promote economic development with those promoting conservationism has yielded promising opportunities for the *** opportunities engage frameworks focused on economic directives while simultaneously considering the need for environmental *** present a unique opportunity for sustainability as they represent the largest proportion of consumed energy,relative to other consumers reliant on the energy grid *** largest source of energy expenditure in a modern building is through the heating and cooling system which facilitates and maintains a comfortable living *** effectively implementing innovative approaches focused on energy preservation and overall reduction of consumption,it is possible to meet emission reduction goals and mitigate other adverse environmental *** play a vital role in energy consumption and overall maintenance of a comfortable ***,the construction and fabrication of windows are the primary means through which optimized temperatures are *** occurs not only through heat and energy transference but also by providing a protective differential between the inside of the building and the harsh weather conditions of the *** such,appropriate widow design strategies not only enhance comfort but reduce overall energy *** study seeks to evaluate double-skin windows in order to offer a solution to excessive energy *** windows work by generating a natural ventilation system in summer and then by producing hot air in winter for year-round comfort that is *** current double-skin windows fail to effectively provide ventilation during warm seasons,a kinetic double-skin window was proposed to address this problem and optimize the

关键词： box window facade kinetic facade energy efficiency air heater natural ventilation

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A topology framework for macromolecular complexes and condensates

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Nano Research 2022年第11期15卷 9809-9817页

作者： Maziar heidari Duane Moes Otto Schullian Barbara Scalvini Alireza Mashaghi Medical Systems Biophysics and Bioengineering Leiden Academic Centre for Drug ResearchFaculty of ScienceLeiden UniversityLeiden 2333CCthe Netherlands Fachbereich Physik Freie Universität BerlinArnimallee 14Berlin 14195Germany Harvard Medical School Harvard University25 Shattuck StBoston MA 02115USA

Macromolecular assemblies such as protein complexes and protein/RNA condensates are involved in most fundamental cellular *** arrangement of subunits within these nano-assemblies is critical for their biological function and is determined by the topology of physical contacts within and between the subunits forming the *** the spatial arrangement of these interactions is of central importance to understand their functional and stability *** this concept article,we propose a circuit topology-based formalism to define the topology of a complex consisting of linear polymeric chains with interand intrachain *** apply our method to a system of model polymer chains as well as protein *** show that circuit topology can categorize different forms of chain *** multi-chain circuit topology should aid analysis and predictions of mechanistic and evolutionary principles in the design of macromolecular assemblies.

关键词： topology macromolecular complex protein evolution folding

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