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Sustainability of the Urban System Planning in Shu City, Kazakhstan: An Evaluation through Residents' Perception

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Chinese Journal of Urban and Environmental Studies 2024年第3期12卷 6-31页

作者： Turdanova Malika SAKHATBEKOVNA Muzdybayeva Karlygash KAMANAEVNA imanaly akbar Tazhekova Akmaral ZHAKSYBEKKYZY Myrzaliyeva Zabira KAZBEKKYZY Department of Geography and Ecology Abai Kazakh National Pedagogical University Department of Recreational Geography and Tourism Al-Farabi Kazakh National University Department of Geography South Kazakhstan Pedagogical University named after O.Zhanibekov

It is important to consider the local people's evaluation in increasing the effectiveness of the sustainable planning process in urban system planning. In this work, the sustainability of urban system planning in Shu city of Kazakhstan is evaluated according to the defined dimensions,which play a key role in determining the population's living standard, and the indicators of each dimension are compared. The data are obtained mainly through the household questionnaire survey, field observations, in depth interviews, and focus group discussion. In total,832 representative respondents were surveyed with five-point Likert scale questions in this paper. The study used 42 indicators based on six dimensions: environmental, social, cultural,economic, religious/spiritual, and institutional dimensions. The results of this analysis show that the sustainability level of urban system planning in Shu city is at a low level in all six dimensions. The results of the indicator analysis show that the people of this region are generally not satisfied with the solution of some environmental, social, and economic problems in Shu city. At the same time, residents rated the indicators of institutional stability as better, on the contrary, they rated cultural and religious/spiritual indicators relatively high. As a result,we initially asserted that the sustainability of the urban system planning in Shu city is not satisfactory considering the existing possibilities. To eliminate this shortcoming, the authorities responsible for planning the urban system should jointly develop a project policy for sustainable development with all interested parties.

关键词： Urban system planning sustainability Shu city Kazakhstan

Biofluidics Study in Digestive System with Thermal Conductivity of Shape Nanosize H2O＋Cu Nanoparticles

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Journal of Bionic Engineering 2015年第4期12卷 656-663页

作者： Noreen Sher akbar DBS&H CEME National University of Sciences and Technology Islamabad Pakistan

In the present article, peristaltic transport of copper nano fluid in a curved channel with complaint walls is studied. Shape effects of nanosize particles are discussed. The mathematical formulation encompasses momentum and heat conservation equations with appropriate boundary conditions for compliant wails. Sophisticated correlations are employed for thermal conductivity of the nanoparticles. The nonlinear boundary value problem is normalized with appropriate variables and closed-form solutions are derived for stream function, pressure gradient and temperature profile. A detailed study is performed for the influence of various nanoparticle geometries （bricks, cylinders and platelets）. With greater curvature value, pressure gradient is enhanced for various nanoparticle geometries. Temperature is dramatically modified with nanoparticle geometry and greater thermal conductivity is achieved with brick shaped nanoparticles in the fluid.

关键词： copper nanoparticles shape effects ofnanosize particles exact solutions curved channel wall properties peristalsis

Finite element model updating for structural damage detection using transmissibility data

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Earthquake Engineering and Engineering Vibration 2024年第1期23卷 87-101页

作者： Ahmad Izadi akbar Esfandiari Department of Maritime Engineering Amirkabir University of TechnologyTehran 15875-4413Iran

This paper presents a new finite element model updating method for estimating structural parameters and detecting structural damage location and severity based on the structural responses(output-only data).The method uses the sensitivity relation of transmissibility data through a least-squares algorithm and appropriate normalization of the extracted *** proposed transmissibility-based sensitivity equation produces a more significant number of equations than the sensitivity equations based on the frequency response function(FRF),which can estimate the structural parameters with higher *** abilities of the proposed method are assessed by using numerical data of a two-story two-bay frame model and a plate structure *** evaluating different damage cases,the number,location,and stiffness reduction of the damaged elements and the severity of the simulated damage have been accurately *** reliability and stability of the presented method against measurement and modeling errors are examined using error-contaminated *** parameter estimation results prove the method’s capabilities as an accurate model updating algorithm.

关键词： damage detection model updating output-only transmissibility sensitivity equation

Lifetime Estimation Based on Surface Degradation and Characterization of HTV Silicone-rubber Based Composites for HVAC and HVDC Transmission

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CSEE Journal of Power and Energy Systems 2023年第2期9卷 751-758页

作者： Rahmat Ullah Muhammad akbar Faculty of Electrical Engineering GIK Institute of Engineering Sciences and TecnologyTopi23460 Pakistan

In this paper,six different types of silicone rubberbased composites were investigated for applications in high voltage insulation through multi-stress accelerated aging conducted for a period of 5000 h both under AC and DC *** main goal of this study was lifetime prediction of HTV-SR based composites at a typical multi-stress aging *** diagnostic techniques such as hydrophobicity assessment,leakage current measurement and FTIR were incorporated to assess the *** an outcome of this investigation,all the five hybrid samples were found as quite resistant to aging while the neat sample was comparatively,less resistant to the ***,among the studied samples,TS2 and TS4 appeared to have shown the highest resistance to aging giving a service life of 43.2 and 42 years,respectively under AC *** DC stress the order of merit of investigated samples was identical to that of AC stress but having marginally less life spans.

关键词： ATH hydrophobicity classification leakage current life time prediction multi-stress accelerated aging silica

A Numerical Algorithm for Determination of a Control Parameter in Two-dimensional Parabolic Inverse Problems

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Acta Mathematicae Applicatae Sinica 2015年第1期31卷 213-224页

作者： akbar Mohebbi Department of Applied Mathematics Faculty of Mathematical Science University of Kashan

Numerical solution of the parabolic partial differential equations with an unknown parameter play a very important role in engineering applications. In this study we present a high order scheme for determining unknown control parameter and unknown solution of two-dimensional parabolic inverse problem with overspe- cialization at a point in the spatial domain. In this approach, a compact fourth-order scheme is used to discretize spatial derivatives of equation and reduces the problem to a system of ordinary differential equations （ODEs）. Then we apply a fourth order boundary value method to the solution of resulting system of ODEs. So the proposed method has fourth order of accuracy in both space and time components and is unconditionally stable due to the favorable stability property of boundary value methods. The results of numerical experiments are presented and some comparisons are made with several well-known finite difference schemes in the literature. Also we will investigate the effect of noise in data on the approximate solutions.

关键词： compact finite difference scheme boundary value method control parameter parabolic inverseproblem temperature over=specification high accuracy noise

Seed Mediated Growth of Gold Nanoparticles Based on Liquid Arc Discharge

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Plasma Science and Technology 2013年第4期15卷 376-381页

作者： Ali akbar ASHKARRAN Department of Physics Faculty of Basic Sciences University of MazandaranBabolsar Iran

We report studies on the growth of gold nanoparticles by a seed-mediated approach in solution. The synthetic method is adapted from one we published earlier （Ashkarran et al. Appl. Phys. A 2009, 96, 423）. The synthesized gold nanoparticles were characterized by X-ray diffraction （XRD）, dynamic light scattering （DLS）, UV-Vis spectroscopy, optical imaging and atomic force microscopy （AFM）. Optical absorption spectroscopy of the prepared samples at 15 A arc current in HAuCI4 solution shows a surface plasmon resonance around 520 nm. It is found that sodium citrate acts as a stabilizer and surface capping agent of the colloidal nanoparticles. The intensity of the plasmonic peak of the prepared gold nanoparticles for 1 minute arc duration gradually increases due to seed mediation for up to 6 hours. The formation time of gold nanoparticles at higher seed concentrations is less than that at lower seed concentrations.

关键词： gold nanoparticles liquid arc discharge seed mediation optical properties

Mesoporous tablet-shaped potato starch aerogels for loading and release of the poorly water-soluble drug celecoxib

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Chinese Journal of Chemical Engineering 2020年第7期28卷 1778-1787页

作者： akbar Mohammadi Jafarsadegh Moghaddas Transport Phenomena Research Center Faculty of Chemical EngineeringSahand University of TechnologyP.O.Box 51335/1996TabrizIran

In this study,after determination of the optimal values of the effective parameters in the synthesis using experimental design software,tablet-shaped potato starch aerogels were synthesized at the optimal condition in order to be used as a drug *** celecoxib,as the model drug,was loaded into the aerogel matrix during the solvent exchange ***(Fourier Transform Infrared Spectroscopy),FESEM and HRTEM(Transmission Electron Microscopy)analyses showed that celecoxib has been successfully loaded into aerogel ***,XRD analysis showed that most of the celecoxib has been loaded in amorphous *** vitro studies were performed in both simulated gastric and intestinal *** release kinetics showed that the loaded celecoxib dissolved faster than crystalline *** rotational speed of 100 r·min^-1,about 26%and 50%and at rotational speed of 50 r·min^-1,about 20%and 42%drug was released during the first 30 min of soaking in the simulated gastric fluid and simulated intestinal fluid,*** release of the mentioned drug was increased up to 60%and 98%at a rotational speed of 100 r·min^-1 and up to 46%and 93%at a rotational speed of 50 r·min^-1 at the end of 5 h in the simulated gastric fluid and simulated intestinal fluid,*** could be concluded that potato starch aerogels can be very useful in many drug delivery applications along with conventional micronization *** of release data showed that the release kinetics follows the Korsmeyer Peppas model,which considers phenomena of matrix erosion and drug diffusion.

关键词： Adsorption isotherm Celecoxib Drug delivery Optimization Starch aerogel

Thermodynamic Interpretation of Field Equations at Horizon of BTZ Black Hole

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Chinese Physics Letters 2007年第5期24卷 1158-1161页

作者： M. akbar Institute of Theoretical Physics Chinese Academy of Sciences PO Box 2735 Beijing 100080

A spacetime horizon comprising with a black hole singularity acts like a boundary of a thermal system associated with the notions of temperature and entropy. In the case of static metric of Banados-Teitelboim-Zanelli （BTZ） black hole, the field equations near the horizon boundary can be expressed as a thermal identity dE = TdS＋ Pr dA, where E = M is the mass of BTZ black hole, dA is the change in the area of the black hole horizon when the horizon is displaced infinitesimally small, Pr is the radial pressure provided by the source of Einstein equations, S = 41πa is the entropy and T =κ/2π is the Hawking temperature associated with the horizon. This approach is studied further to generalize it for non-static BTZ black hole, showing that it is also possible to interpret the field equation near horizon as a thermodynamic identity dE = TdS ＋ PrdA ＋Ω＋dJ, where Ω＋ is the angular velocity and J is the angular momentum of BTZ black hole. These results indicate that the field equations for BTZ black hole possess intrinsic thermodynamic properties near the horizon.

关键词： SITTER SPACETIMES 1ST LAW GRAVITY ENTROPY

Short-term prediction of NO_(2) and NO_(x) concentrations using multilayer perceptron neural network: a case study of Tabriz, Iran

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Ecological Processes 2017年第1期6卷 21-29页

作者： akbar Rahimi Department of Landscape Engineering Agricultural FacultyUniversity of TabrizBolvare 29 BahmanTabrizIran

Introduction:Due to the health effects caused by airborne pollutants in urban areas,forecasting of air quality parameters is one of the most important topics of air quality *** recent years,statistical models based on artificial neural networks(ANNs)have been increasingly applied and evaluated for forecasting of air ***:The development of ANN and multiple linear regressions(MLRs)has been applied to short-term prediction of the NO_(2) and NO_(x) concentrations as a function of meteorological *** optimum structure of ANN was determined by a trial and error *** used hourly NO_(x) and NO_(2) concentrations and metrological parameters,automatic monitoring network during October and November 2012 for two monitoring sites(Abrasan and Farmandari sites)in Tabriz,***:Designing of the network architecture is based on the approximation theory of Kolmogorov,and the structure of ANN with 30 neurons had the best *** trained by scaled-conjugate-gradient(trainscg)training algorithm has implemented to *** also demonstrates that MLP neural networks offer several advantages over linear MLR *** results show that the correlation coefficient(R2)values are 0.92 and 0/94 for NO_(2) and NO_(x) concentrations,*** in MLR model,R2 values were 0.41 and 0.44 for NO_(2) and NO_(x) concentrations,***:This work shows that MLP neural networks can accurately model the relationship between local meteorological data and NO_(2) and NO_(x) concentrations in an urban environment compared to linear models.

关键词： Air pollution prediction Artificial neural network Multilayer perceptron NO_(2) NO_(x)