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Heat Transfer Analysis for Industrial AC Electric Arc Furnace

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Journal of Iron and Steel Research International 2005年第4期12卷 9-16页

作者： ünal  amdali murat tun Development Bank of Turkey Ankara 06100 TurkeyYeditepe University Istanbul 81120 Turkey

The heat transfer analysis was performed for an AC electric arc furnace (EAF). Heat losses by conduction, convection and radiation from outer surface, roof, bottom and electrodes of EAF were determined in detail. Some... 详细信息

关键词： electric arc furnace (EAF) heat analysis industrial furnace

Computer Aided Mass Balance Analysis for AC Electric Arc Furnace Steelmaking

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Journal of Iron and Steel Research International 2005年第3期12卷 11-13页

作者： anal amdali murat tun Development Bank of Turkey Yeditepe University Ankara 06100 TurkeyIstanbul 81120 Turkey

A mass balance analysis was undertaken for liquid steel production using a computer program specially developed for the AC electric arc furnace at an important alloy steel producer in Turkey. The data obtained by usin... 详细信息

关键词： electric arc furnace liquid steel mass balance analysis

Steady State Heat Transfer of Ladle Furnace During Steel Production Process

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Journal of Iron and Steel Research International 2006年第3期13卷 18-20,25页

作者： Unal Camdali murat.tun Development Bank of Turkey Ankara 06100Turkey Engineering Faculty Yeditepe UniversityIstanbul 81120 KayιsdagιTurkey

The heat transfer analysis was performed for an industrial ladle furnace （LF） with a capacity of 55-57 t in Turkey. The heat losses by conduction, convection and radiation from outer and bottom surfaces, top and ele... 详细信息

关键词： heat transfer ladle furnace refining liquid steel

Transient Temperature Analysis of Slab in Erdemir

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Journal of Iron and Steel Research International 2008年第2期15卷 43-45页

作者： nal amdali murat tun Sedat Sisbot Faculty of Engineering and Architecture Abant Izzet Baysal University Engineering Faculty Yeditepe University

A transient thermal model was developed for slab furnaces in Eregli Iron and Steel Works （Erdemir） in Turkey and the model was solved using the FlexPDE computer program. This program uses the finite element method. Program codes were written to solve the temperature distribution of slabs that are put into furnace at 25 ℃ and removed at about 1 250℃. To obtain the optimum slab exit temperature variation, the necessary air temperature inside the furnace was calculated to be 1 390℃. The slab temperature versus time and the temperature variation inside the slab were depicted.

关键词： Erdemir finite element method industrial system slab slab furnace temperature analysis

Management of hypotony and flat anterior chamber associated with glaucoma filtration surgery

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International Journal of Ophthalmology(English edition) 2015年第5期8卷 950-953页

作者： Yavuz tun Mehmet Tetikoglu Necip Kara Haci murat Sagdik Selahattin zarpaci Mustafa Nuri Elioglu Department of Ophthalmology Denizli Government Hospital Department of Ophthalmology Dumlupinar University School of Medicine Department of Ophthalmology Gaziantep University School of Medicine Department of Ophthalmology Okmeydani Education and Research Hospital

AIMTo determine the effectiveness of pharmacological and interventional treatment of hypotony and flat anterior chamber (FAC) resulting from glaucoma filtration *** retrospectively examined the medical records of fifty-two trabeculectomy patients (52 eyes) who developed postoperative hypotony and FAC. The management and associated complications of hypotony, changing intraocular pressure (IOP) and best corrected visual acuity (BCVA) were *** the 52 patients with hypotony, 29 (56%) had a grade 1 FAC, 21 (40%) had a grade 2 FAC, and only 2 had a grade 3 FAC. There was no significant difference between the mean preoperative IOP and the mean IOP at three and six months after surgery. Thirteen eyes (25%) required antiglaucomatous medication three months after surgery. The mean BCVA at 6mo after surgery was significantly reduced as compared with the mean preoperative *** and FAC following trabeculectomy are associated with troublesome complications that require pharmacological and/or surgical treatment. Thus, close follow-up is essential for affected patients.

关键词： hypotony flat anterior chamber trabeculectomy

Human Gait Recognition Based on Kernel PCA Using Projections

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Journal of Computer Science & Technology 2007年第6期22卷 867-876页

作者： murat Ekinci murat Aykut Computer Vision Lab Department of Computer EngineeringKaradeniz Technical University61080 TrabzonTurkey

This paper presents a novel approach for human identification at a distance using gait recognition. Recognition of a person from their gait is a biometric of increasing interest. The proposed work introduces a nonlinear machine learning method, kernel Principal Component Analysis （PCA）, to extract gait features from silhouettes for individual recognition. Binarized silhouette of a motion object is first represented by four 1-D signals which are the basic image features called the distance vectors. Fourier transform is performed to achieve translation invariant for the gait patterns accumulated from silhouette sequences which are extracted from different circumstances. Kernel PCA is then used to extract higher order relations among the gait patterns for future recognition. A fusion strategy is finally executed to produce a final decision. The experiments are carried out on the CMU and the USF gait databases and presented based on the different training gait cycles.

关键词： biometrics gait recognition gait representation kernel PCA pattern recognition

Palmprint Recognition by Applying Wavelet-Based Kernel PCA

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Journal of Computer Science & Technology 2008年第5期23卷 851-861页

作者： murat Ekinci murat Aykut Computer Vision Lab Department of Computer Engineering Karadeniz Technical University

This paper presents a wavelet-based kernel Principal Component Analysis （PCA） method by integrating the Daubechies wavelet representation of palm images and the kernel PCA method for palmprint recognition. Kernel PCA is a technique for nonlinear dimension reduction of data with an underlying nonlinear spatial structure. The intensity values of the palmprint image are first normalized by using mean and standard deviation. The palmprint is then transformed into the wavelet domain to decompose palm images and the lowest resolution subband coefficients are chosen for palm representation. The kernel PCA method is then applied to extract non-linear features from the subband coefficients. Finally, similarity measurement is accomplished by using weighted Euclidean linear distance-based nearest neighbor classifier. Experimental results on PolyU Palmprint Databases demonstrate that the proposed approach achieves highly competitive performance with respect to the published palmprint recognition approaches.

关键词： palmprint recognition kernel PCA wavelet transform biometrics pattern recognition

Towards functional verifying a family of SystemC TLMs

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Frontiers of Computer Science 2020年第1期14卷 53-66页

作者： tun LI Jun YE Qingping TAN College of Computer National University of Defense TechnologyChangsha 410073China Laboratory of Software Engineering for Complex Systems Changsha 410073China Jiangnan Institute of Computing Technology Wuxi 214083China

It is often the case that in the development of a system-on-a-chip(SoC)design,a family of SystemC transaction level models(TLM)is *** in the same family often share common functionalities but differ in their timing,implementation,configuration and performance in various SoC developing *** most cases,all the TLMs in a family must be verified for the follow-up design *** our previous work,we proposed to call such family TLM product line(TPL),and proposed feature-oriented(FO)design methodology for efficient TPL ***,developers can only verify TLM in a family one by one,which causes large portion of duplicated verification ***,in our proposed methodology,functional verification of TPL has become a *** this paper,we proposed a novel TPL verification method for FO *** our method,for the given property,we can exponentially reduce the number of TLMs to be verified by identifying mutefeature-modules(MFM),which will avoid duplicated *** proposed method is presented in informal and formal way,and the correctness of it is *** theoretical analysis and experimental results on a real design show the correctness and efficiency of the proposed method.

关键词： system-on-a-chip transaction level model SystemC feature-oriented functional verification

Multi-point Optimization of Recirculation Flow Type Casing Treatment in Centrifugal Compressors

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Journal of Thermal Science 2016年第3期25卷 231-241页

作者： Min Thaw tun Daisaku Sakaguchi Nagasaki University 1-14 Bunkyo-machi 852-8521 Nagasaki Japan

High-pressure ratio and wide operating range are highly required for a turbocharger in diesel engines. A recirculation flow type casing treatment is effective for flow range enhancement of centrifugal compressors. Two ring grooves on a suction pipe and a shroud casing wall are connected by means of an annular passage and stable recirculation flow is formed at small flow rates from the downstream groove toward the upstream groove through the annular bypass. The shape of baseline recirculation flow type casing is modified and optimized by using a multi-point optimization code with a metamodel assisted evolutionary algorithm embedding a commercial CFD code CFX from ANSYS. The numerical optimization results give the optimized design of casing with improving adiabatic efficiency in wide operating flow rate range. Sensitivity analysis of design parameters as a function of efficiency has been performed. R is found that the optimized casing design provides optimized recirculation flow rate, in which an increment of entropy rise is minimized at grooves and passages of the rotating impeller.

关键词： Centrifugal Compressor Casing Treatment Multi-point Optimization Turbocharger