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superhydrophobic PVDF/TiO_2-siO_2 Membrane with Hierarchical Roughness in Membrane Distillation for Water Recovery from Phenolic Rich solution Containing surfactant

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Chinese Journal of Polymer science 2019年第6期37卷 609-616页

作者： N.Hamzah C.P.Leo B.s.Ooi school of Chemical Engineering Engineering Campus Universiti Sains Malaysia

superhydrophobic poly(vinylidene fluoride)(PVDF) membrane incorporated with nanoparticles was applied in membrane distillation to recover water from phenolic rich solution containing surfactant. The membranes coated on woven support were fabricated using phase inversion with dual bath coagulation and post-modified using silane. The membranes incorporated with TiO_2, siO_2, or a mixture of TiO_2-siO_2 nanoparticles achieved the water contact angle higher than 160°. The addition of TiO_2-siO_2 mixture into PVDF matrix further enhanced the hierarchical roughness of membrane. Hence, PVDF/TiO_2-siO_2 membrane achieved the highest permeation flux and rejected 99.9% of gallic acid in the feed(100 g/L). PVDF/TiO_2-siO_2 membrane also maintained a relative flux(J/J0) higher than0.9 after 8 h of operation. Even with the presence of surfactant in phenolic rich solution, PVDF/TiO_2-siO_2 membrane was able to exhibit relative flux above 0.8. The significant changes on the hydrophobicity and chemical properties of PVDF/TiO_2-siO_2 membrane due to fouling were not observed after 50 h of static adsorption test.

关键词： superhydrophobic PVDF Nano particles Roughness Membrane distillation

Numerically simulated behavior of radiative Fe_(3)O_(4) and multi-walled carbon nanotube hybrid nanoparticle flow in presence of Lorentz force

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Applied Mathematics and Mechanics(English Edition) 2021年第3期42卷 347-356页

作者： s.A.sHEHZAD M.sHEIKHOLEsLAMI T.AMBREEN A.sHAFEE Department of Mathematics COMSATS University IslamabadSahiwal 57000Pakistan Renewable Energy systems and Nanofluid Applications in Heat Transfer Laboratory Babol Noshirvani University of TechnologyBabol 47148-71167Iran Department of Mechanical Engineering Babol Noshirvani University of TechnologyBabol 47148-71167Iran school of Mechanical Engineering Kyungpook National UniversityDaegu 41566South Korea Institute of Research and Development Duy Tan UniversityDa Nang 550000Vietnam

Free convection in hybrid nanomaterial-saturated permeable media is crucial in various engineering *** present study aims to investigate the free convection of an aqueous-based hybrid nanomaterial through a zone under the combined effect of the Lorentz force and *** natural convection of the hybrid nanomaterial is modeled by implementing a control volume finite element method(CVFEM)-based code,whereas Darcy assumptions are used to model the porosity terms in the momentum buoyancy equation involving the average Nusselt number Nu_(ave),flow streamlines,and isotherm profiles.A formula for estimating Nu_(ave) is *** results show that the magnetic force retards the flow,and the fluid tends to attract the magnetic field ***_(ave) is directly correlated with the Rayleigh number and radiation;however,it is indirectly dependent on the Hartmann *** is the dominant mode at larger Darcy and Hartmann numbers.

关键词： free convection hybrid nanoparticle Darcy porous space Hartmann number radiation

Losses Estimation in Transonic Wet steam Flow through Linear Blade Cascade

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Journal of Thermal science 2015年第2期24卷 109-116页

作者： sawomir Dykas Mirosaw Majkut Micha strozik Krystian smoka Institute of Power Engineering and Turbomachinery Silesian University of Technology

Experimental investigations of non-equilibrium spontaneous condensation in transonic steam flow were carded out in linear blade cascade. The linear cascade consists of the stator blades of the last stage of low pressure steam turbine. The applied experimental test section is a part of a small scale steam power plant located at silesian Uni- versity of Technology in Gliwice. The steam parameters at the test section inlet correspond to the real conditions in low pressure part of 200MWe steam turbine. The losses in the cascade were estimated using measured static pressure and temperature behind the cascade and the total parameters at inlet. The static pressure measurements on the blade surface as well as the schlieren pictures were used to assess the flow field in linear cascade of steam turbine stator blades.

关键词： wet steam condensation transonic flow losses

Review of stochastic optimization methods for smart grid

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Frontiers in Energy 2017年第2期11卷 197-209页

作者： s. surender REDDY Vuddanti sANDEEP Chan-Mook JUNG Department of Railroad and Electrical Engineering Woosong Uni-versity Republic of Korea school of Engineering Central University of Kamataka India Department of Railroad and Civil Engineering Woosong UniversityRepublic of Korea

This paper presents various approaches used by researchers for handling the uncertainties involved in renewable energy sources, load demands, etc. It gives an idea about stochastic programming (sP) and discusses the formulations given by different researchers for objective functions such as cost, loss, generation expansion, and voltage/V control with various conventional and advanced methods. Besides, it gives a brief idea about sP and its applications and discusses different variants of sP such as recourse model, chance constrained programming, sample average approximation, and risk aversion. Moreover, it includes the application of these variants in various power systems. Furthermore, it also includes the general mathematical form of expression for these variants and discusses the mathematical description of the problem and modeling of the system. This review of different optimization techniques will be helpful for smart grid development including renewable energy resources (RERs).

关键词： renewable energy sources stochastic optimization smart grid uncertainty optimal power flow (OPF)

A Hybrid Artificial Intelligence Model for skin Cancer Diagnosis

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Computer systems science & Engineering 2021年第5期37卷 233-245页

作者： V.Vidya Lakshmi J.s.Leena Jasmine Research scholar Anna UniversityChennaiTamil Nadu600025India Velammal Engineering college ChennaiTamil Nadu600066India

Melanoma or skin cancer is the most dangerous and deadliest *** the incidence and mortality rate of skin cancer increases worldwide,an automated skin cancer detection/classification system is required for early detection and prevention of skin *** this study,a Hybrid Artificial Intelligence Model(HAIM)is designed for skin cancer *** uses diverse multi-directional representation systems for feature extraction and an efficient Exponentially Weighted and Heaped Multi-Layer Perceptron(EWHMLP)for the *** the wavelet transform is a powerful tool for signal and image processing,it is unable to detect the intermediate dimensional structures of a medical *** the proposed HAIM uses Curvelet(CurT),Contourlet(ConT)and shearlet(sheT)transforms as feature extraction *** MLP is very flexible and well suitable for the classification problem,the learning of weights is a challenging ***,the optimization process does not converge,and the model may not be *** overcome these drawbacks,EWHMLP is *** show that the combined qualities of each transform in a hybrid approach provides an accuracy of 98.33%in a multi-class approach on PH2 database.

关键词： skin cancer multi-directional systems curvelet contourlet shearlet multi-layer perceptron

stability of Quark star Models

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Communications in Theoretical Physics 2016年第5期65卷 575-584页

作者： M.Azam s.A.Mardan M.A.Rehman Division of science and Technology University of Education Department of Mathematics University of the Management and Technology

In this paper,we investigate the stability of quark stars with four different types of inner matter configurations;isotropic,charged isotropic,anisotropic and charged anisotropic by using the concept of *** this purpose,we have applied local density perturbations technique to the hydrostatic equilibrium equation as well as on physical parameters involved in the *** conclude that quark stars become potentially unstable when inner matter configuration is changed and electromagnetic field is applied.

关键词： quark stars cracking density perturbations electromagnetic field

Inverse Analysis of Origin-Destination Matrix for Microscopic Traffic simulator

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Computer Modeling in Engineering & sciences 2017年第1期113卷 71-87页

作者： K.Abe H.Fujii s.Yoshimura The University of Tokyo BunkyoTokyoJapan

Microscopic traffic simulations are useful for solving various trafficrelated problems,*** jams and accidents,local and global environmental and energy problems,maintaining mobility in aging societies,and evacuation planning for natural as well as man-made *** origin-destination(OD)matrix is often used as the input to represent traffic demands into traffic *** this study,we propose an indirect method for estimating the OD matrix using a traffic simulator as an internal *** proposed method is designed to output results that are consistent with the input of the *** method consists of the following steps:(1)calculating link traffic volume from the OD matrix,and(2)updating the *** estimated matrix is updated iteratively until it converges to a predefined tolerance *** experiments are then conducted using the proposed method on a grid network and on a representation of an actual road ***,we discuss the characteristics of the proposed method and the non-negative constraint for the traffic volume.

关键词： OD estimation inverse problem traffic simulation Levenberg-Marquardt method iterative method

COMPUTER-AID ANALYsIs FOR CRACKING OF 280 CONNECTING ROD OF 16V280ZJ DIEsEL LOCOMOTIVE ON QUENCHING PROCEss

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Acta Metallurgica sinica(English Letters) 2004年第1期17卷 83-91页

作者： J.s.Ye A.Yang Y.Luo Hangzhou Iron & steel Group Co.Technology Center.Hangzhou 310022 ChinaZiyang Internal-Combustion Plant of Sichuang Ziyang 641000 ChinaZiyang Internal-Combustion Plant of Sichuang Ziyang 641000 China

280 connecting rod is one of the most important parts for 16V280ZJ diesel locomotive, so it needs much better mechanical performance. However, the crack is often generated at the middle section of connecting rod body on heat treatment process. A temperature-phase transformation-stress coupled 3D non-linear mathematical model has been developed to analyze the reasons of cracking. The simulation and experimental results show that the compressive stress on the cracking position is close to the fracture stress of connecting rod and the reasons of crack are mainly contributed to the carbon content excess of original material or the aging of quenchant.

关键词： crack phase transformation non-linear compressive stress

LOCV calculation of the equations of state and properties of rapidly rotating neutron stars

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Chinese Physics C 2018年第6期42卷 128-133页

作者： A.H.Farajian M.Bigdeli s.Belbasi Department of Physics University of Zanjan

In this paper, we have investigated the structural properties of rotating neutron stars using the numerical RNs code and equations of state which have been calculated within the lowest order constrained variational（LOCV）approach. In order to calculate the equation of state of nuclear matter, we have used UV（14）＋TNI and AV（18） *** have computed the maximum mass of the neutron star and the corresponding equatorial radius at different angular velocities. We have also computed the structural properties of Keplerian rotating neutron stars for the maximum mass configuration, MK, RK, fK and jmax.

关键词： LOCV method neutron star matter equation of state rotating neutron star