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Rare Earth Elements Geochemistry of Sheikh-Marut Laterite Deposit,NW Mahabad,West-Azarbaidjan Province,Iran

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Acta Geologica Sinica(English Edition) 2013年第1期87卷 176-185页

作者： ali ABEDINI ali Asghar CALAGARI Geology Department Faculty of SciencesUrmia University Geology Department Faculty of Natural SciencesUniversity of Tabriz

Laterite deposit at Sheikh-Marut （NW occurred within middle-upper Permian carbonate Mahabad, West-Azarbaidjan province, Iran） rocks. It consists of seven stratiform and/or discontinuous lenticular layers extending over 4.2 km in length and having thicknesses ranging from 3 to 14 m. Mineralogical data show that the ores contain kaolinite and hematite as major and boehmite, diaspore, halloysite, amesite, anatase, and muscovite-illite as minor mineral phases. The computed Ce anomaly values in the ores range from 0.05 to 20.84. Conservative index （e.g., Eu/Eu＊） suggests that this deposit is a product of alteration and weathering of basaltic rocks. Rhythmic increment of EREE values of the ores with approaching to the carbonate bedrocks shows an in-situ occurrence of lateritization processes. Mass change calculations of elements indicate that two competing processes namely leaching and fixation were the major regulating factors in concentration variation of REEs （La-Lu） in this deposit. The obtained results show that pH increase of weathering solutions by carbonate bedrocks, existence of organic matters, and the degree of comlexation with organic ligands played remarkable role in distribution of REEs during lateritization. Further geochemical considerations revealed that secondary phosphates, Mn-oxides and -hydroxides, diaspore, and anatase were the potential hosts for REEs in this deposit.

关键词： laterite geochemistry REEs Sheikh-Marut deposit Mahabad Iran

Comments on “Distillability sudden death in qutrit qutrit systems under thermal reservoirs”

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Chinese Physics B 2014年第9期23卷 87-90页

作者： Mazhar ali Department of Electrical Engineering COMSATS Institute of Information Technology

In a recent paper （2012 Chin. Phys. B 21 084205）, the authors studied the problem of distillability sudden death. We find that their equation of motion is incorrect and consequently the rest of the paper is wrong. Even apart from starting with a wrong equation of motion, their description of the phenomenon of distillability sudden death is totally misleading and needs to be rectified. To this aim, we show that certain initially prepared free-entangled states become bound-entangled in a finite time under thermal reservoirs. Moreover, in contrast with zero-temperature reservoirs, simple local unitary transformations cannot completely avoid distillability sudden death.

关键词： distillability thermal reservoirs bound entanglement

Computationally efficient MUSIC based DOA estimation algorithm for FMCW radar

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Journal of Electronic Science and Technology 2023年第1期21卷 46-64页

作者： Bakhtiar ali Karim Haitham Kareem ali Department of Communication Engineering Sulaimani Polytechnic UniversitySulaymaniyah70-236Iraq

This paper proposes low-cost yet high-accuracy direction of arrival(DOA)estimation for the automotive frequency-modulated continuous-wave(FMcW)*** existing subspace-based DOA estimation algorithms suffer fromeither high computational costs or low *** aim to solve such contradictory relation between complexity and accuracy by using randomizedmatrix ***,we apply an easily-interpretablerandomized low-rank approximation to the covariance matrix(CM)and R∈C^(M×M)throughthresketch maties in the fom of R≈OBQ^(H).Here the approximately compute its *** is,we first approximate matrix Q∈C^(M×z)contains the orthonormal basis for the range of the sketchmatrik C∈C^(M×z)cwe whichis etrated fom R using randomized unifom counsampling and B∈C^(z×z)is a weight-matrix reducing the approximation *** on such approximation,we are able to accelerate the subspacecomputation by the orders of the magnitude without compromising estimation ***,we drive a theoretical error bound for the suggested scheme to ensure the accuracy of the *** validated by the simulation results,the DOA estimation accuracy of the proposed algorithm,eficient multiple signal classification(E-MUSIC)s high,closely tracks standardMUSIC,and outperforms the well-known algorithms with tremendouslyreduced time ***,the devised method can realize high-resolutionreal-time target detection in the emerging multiple input and multiple output(MIMO)automotive radar systems.

关键词： Computational complexity Direction of arrival(DOA)estimation Frequency-modulated continuous-wave(FMCW)radar Subspace algorithms

Mesoscale Wind Farm Placement via Linear Optimization Constrained by Power System and Techno-economics

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Journal of Modern Power Systems and Clean Energy 2021年第2期9卷 356-366页

作者： ali Erduman Bahri Uzunoglu Bedri Kekezoglu ali Durusu the Electrical Engineering Department Hakkari UniversityHakkari30000 Turkey Department of Engineering Sciences Department of Electrical EngineeringComputational and Data-enabled Science and Engineering in Energy SystemsUppsala University75121 UppsalaSweden Department of Mathematics Florida State UniversityTallahasseeFL 32310USA the Electrical Engineering Department Yildiz Technical UniversityIstanbul34220 Turkey

The objective of this study is to develop a wind farm placement and investment methodology based on a linear optimization *** problem has a major significance for the investment success for the projects of renewable energy such as wind *** this study,a mesoscale approach is adopted whereby the wind farm location is investigated in comparison with a microscale approach where the location of each individual turbine is *** study focuses on the placement of a wind farm by economical optimization constrained by the power system,wind resources,and *** optimization is introduced in this context at the power system which is constrained by wind farm planning.

关键词： Generation expansion grid integration mesoscale wind farm linear optimization wind power

Rockfall hazard assessment in a natural and historical site: The case of ancient Kilistra settlement(Konya), Turkey

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Journal of Mountain Science 2022年第1期19卷 151-166页

作者： ali BOZDAĞ Department of Geological Engineering Konya Technical UniversityKonya 42250Turkey

The ancient Kilistra settlement is a natural,historical and cultural heritage site in Central Anatolia(Turkey), which makes it an attractive destination for tourists. However, the settlement located on a hill with steep hillsides has suffered from rockfall events,causing the destruction of some historical *** rockfall risk in the region continues to create a serious danger today for land users and visitors during uncontrolled tourist visits. This paper offers an assessment of rockfall hazard for the ancient Kilistra settlement based on experimental investigation and numerical analyses. For the study, comprehensive field studies were carried out, including the identification of slope profiles, scanline surveys on discontinuities and stability analysis of the slopes. The location and size of the fallen, detached and hanging blocks were also identified. Geomechanical properties of the geological units were determined, and also the rockfall risk rating method was applied for the evaluation of the rockfall hazard risk. Runout distance, bounce height, kinetic energy as well as the velocity of the detached and hanging blocks were determined by using twodimensional rockfall analyses. Based on the results from the rockfall analyses, possible rockfall-based danger zones have been defined for the ancient Kilistra settlement and its close vicinity. The results of this study point at an immediate necessity for the installation of support systems. Findings of the study also offer preliminary data for the description of risk administration strategies and also provide scientific contribution to the study of the hazard and risk resulting from rockfall phenomena.

关键词： Rockfall risk Rockfall hazard Rockfall danger zone Discontinuity Ancient Kilistra settlement Rockfall risk rating method

A METHOD FOR SOLVING THE INVERSE SCATTERING PROBLEM FOR SHAPE AND IMPEDANCE

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Journal of Computational Mathematics 2008年第4期26卷 624-632页

作者： ali Yang LiantangWang School of Science Xi'an Polytechnic University Xi'an 710048 China and Department of Mathematics Northwest University Xi ' an 710069 China Mathematics Department of Northwest University Xi'an 710069 China

The inverse problem considered in this paper is to determine the shape and the impedance of an obstacle from a knowledge of the time-harmonic incident field and the phase and amplitude of the far field pattern of the scattered wave in two-dimension. Single-layer potential is used to approach the scattered waves. An approximation method is presented and the convergence of the proposed method is established. Numerical examples are given to show that this method is both accurate and easy to use.

关键词： Impedance boundary condition Helmholtz equation Inverse scattering Convergence.

Eco-friendly green synthesis of novel magnetic Fe3O4/SiO2/ZnO-Pr6O11 nanocomposites for photocatalytic degradation of organic pollutant

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Journal of Rare Earths 2020年第1期38卷 13-20页

作者： Mohammad ali Ebrahimzadeh Sobhan Mortazavi-Derazkola Mohammad ali Zazouli Pharmaceutical Sciences Research Center Hemoglobinopathy Institute and Department of Medicinal ChemistrySchool of PharmacyMazandaran University of Medical ScienceSariP.O.Box 48471-93698Iran Department of Environmental Health Engineering Health Science Research CenterFaculty of HealthMazandaran University of Medical ScienceSariP.O.Box 48471-16548Iran

This study reports the successful so nochemical synthesis of novel Fe3O4/SiO2/ZnO-Pr6O11(Fe/Si/Zn-Pr6O11) nanocomposites using fructose as a green capping *** influence of various parameters containing capping agent,power and time of ultrasound irradiation was investigated to reach optimum morphology and size *** products obtained were characterized by transmission electron microscopy(TEM),UV/Vis diffuse reflectance spectroscopy(DRS),Fourier transform infrared spectra(FT-IR),vibration sample magnetometer(VSM),scanning electron microscopy(SEM),energy dispersive X-ray microanalysis(EDS) and X-ray diffraction(XRD).The Fe3O4/SiO2/ZnO-Pr6O11 nanocomposites display remarkably enhanced photocatalytic activity towards rhodamine b degradation(89.6%)and Congo red(84.7%) under UV irradiation compared with the other *** results illustrate that the photocatalytic efficiency of magnetic nanocomposites is very much higher than pure *** photocatalyst still has good stability after five successive ***,these recyclable nanocomposites can play a role in the treatment of both industrial and domestic contaminated water.

关键词： Sonochemical synthesis Nanocomposite Photocatalysis Electron microscopy Rhodamine b Praseodymium oxide

Optimization and Simulation of Operation Performance in Crushing Plants Using Fuzzy Modelling

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Journal of Systems Science and Systems Engineering 2019年第6期28卷 766-780页

作者： Khaled ali Abuhasel Mechanical Engineering Department College of EngineeringUniversity of BishaBisha 61922Saudi Arabia

This research includes optimization of aggregate production of the stone crushing plant using fuzzy *** investigation includes onsite aggregate testing and fuzzy logic *** modelling is a type of computerized reasoning used to simulate the real plant *** this work,a lot of agent degree information for crushers were reproduced using fuzzy *** logic was then used to shape the information after a crusher *** logic is created to improve the final product gradation for the *** for utilizing the created fuzzy model is sketched out and could be utilized as a part of a representative preparing program or for informative *** the tonnages anticipated by fuzzy,it is evident that the program does great in predicting the final product tonnage with an average of 13.7 % for just four samples.

关键词： Aggregate production crushing fuzzy modelling product tonnage

Applying the New Extended Direct Algebraic Method to Solve the Equation of Obliquely Interacting Waves in Shallow Waters

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Journal of Ocean University of China 2020年第4期19卷 772-780页

作者： KURT ali TOZAR ali TASBOZAN Orkun Department of Mathematics Faculty of Science and ArtPamukkale UniversityDenizli 20160Türkiye Department of Physic Faculty of Science and ArtMustafa Kemal UniversityHatay 31001Türkiye Department of Mathematics Faculty of Science and ArtMustafa Kemal UniversityHatay 31001Türkiye

In this study,the potential Kadomtsev-Petviashvili(pKP)equation,which describes the oblique interaction of surface waves in shallow waters,is solved by the new extended direct algebraic *** results of the study show that by applying the new direct algebraic method to the pKP equation,the behavior of the obliquely interacting surface waves in two dimensions can be *** article fairly clarifies the behaviors of surface waves in shallow *** the literature,several mathematical models have been developed in attempt to study these behaviors,with nonlinear mathematics being one of the most important steps;however,the investigations are still at a level that can be called‘baby steps’.Therefore,every study to be carried out in this context is of great ***,this study will serve as a reference to guide scientists working in this field.

关键词： conformable fractional derivative new extended direct algebraic method interacting wave equation shallow water waves