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Numerical Prediction of Total Resistance Using Full Similarity Technique

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China Ocean Engineering 2019年第4期33卷 493-502页

作者： Savas SEZEN ferdi CAKICI Department of Naval Architecture and Marine Engineering Yildiz Technical University

Model tests are often conducted by researchers in a real or a numerical towing tank to calculate residuary resistance of a ship with the aid of Froude similarity. Common ITTC-1957 formula is usually employed to calculate frictional resistance. As computer technologies develop over time, CFD tools are used for calculating total resistance of a ship at full scale without establishing any dynamic similarities. In this paper, both Froude and Reynolds similarities are numerically implemented to four different model scales by using virtual fluids. The total resistance at different Fr numbers calculated by the numerical study is validated against the experimental data of DTMB 5512 (L=3.048 m) model hull. The results show that establishing Froude and Reynolds similarities together in numerical simulation is possible in principle. To determine whether it has advantages for prediction of full-scale ship total resistance by employing this method, it is also examined the model scale with the same number of elements and Reynolds number of the full-scale ship. Results show that numerical calculation of total resistance for a full-scale ship in a model scale by defining virtual fluids has only slight advantages on the prediction of residuary resistance. Additionally, no advantage in the calculation of frictional resistance is observed.

关键词： total resistance Froude and Reynolds similarities DTMB 5512 CFD

A comparative assessment of rock mass deformation modulus

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International Journal of Mining Science and Technology 2015年第5期25卷 735-740页

作者： Kadir Karaman ferdi Cihangir Ayhan Kesimal Department of Mining Engineering Karadeniz Technical University

Deformation modulus of a rock mass(E_m) is one of the most important design parameters in construction of rock engineering projects such as underground ***,difficulties are frequently encountered during in-situ tests which are also time-consuming and expensive for determining this *** E_m is often estimated indirectly from proposed equations by different researchers,many of these equations cannot be used in case of problematic rock conditions(thinly bedded,highly jointed rock masses,etc.) as high quality core samples are *** study aims to explore more practical and useful equation for E_m estimation using Rock Quality Designation(RQD) and point load index *** were made between available empirical equations and the proposed E_m equation in terms of the estimation *** comparison tests(ANOVA) showed that E_m can be reliably estimated using proposed equation especially at the preliminary stages of projects.

关键词： Rock mass deformation modulus RQD RMR Q RMi Point load index

A fuzzy-logic-based approach to accurate modeling of a double gate MOSFET for nanoelectronic circuit design

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Journal of Semiconductors 2012年第9期33卷 43-49页

作者： F.Djeffal A.ferdi M.Chahdi LEA Department of ElectronicsUniversity of Batna05000 BatnaAlgeria LEPCM Department of ElectronicsUniversity of Batna05000 BatnaAlgeria

The double gate （DG） silicon MOSFET with an extremely short-channel length has the appropriate fea- tures to constitute the devices for nanoscale circuit design. To develop a physical model for extremely scaled DG MOSFETs, the drain current in the channel must be accurately determined under the application of drain and gate voltages. However, modeling the transport mechanism for the nanoscale structures requires the use of overkill meth- ods and models in terms of their complexity and computation time （self-consistent, quantum computations ）. Therefore, new methods and techniques are required to overcome these constraints. In this paper, a new approach based on the fuzzy logic computation is proposed to investigate nanoscale DG MOSFETs. The proposed approach has been implemented in a device simulator to show the impact of the proposed approach on the nanoelectronic cir- cuit design. The approach is general and thus is suitable for any type ofnanoscale structure investigation problems in the nanotechnology industry.

关键词： nanoscale circuit DG MOSFET fuzzy modelling computational cost circuit design

Precise synthesis of discrete and dispersible carbon- protected magnetic nanoparticles for efficient magnetic resonance imaging and photothermal therapy

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Nano Research 2016年第5期9卷 1460-1469页

作者： An-Hui Lu Xiang-Qian Zhang Qiang Sun Yan Zhang Qingwei Song ferdi Schuth Fang Cheng State Key Laboratory of Fine Chemicals School of Chemical Engineering Faculty of Chemical Environmental and Biological Science and Technology Dalian University of Technology Dalian 116024 China Dalian Medical University affiliated No. I Hospital Dalian 116021 China Max-Planck-lnstitut fur Kohlenforschung Kaiser-Wilhelm-Platz 1 D-45470 Mulheim an der Ruhr Germany State Key Laboratory of Fine Chemicals School of Pharmaceutical Science and Technology Dalian University of Technology Dalian 116024 China

Carbon-protected magnetic nanoparticles exhibit long-term stability in acid or alkaline medium, good biocompatibility, and high saturation magnetization. As a result, they hold great promise for magnetic resonance imaging, photothermal therapy, etc. However, since pyrolysis, which is often required to convert the carbon precursors to carbon, typically leads to coalescence of the nanoparticles, the obtained carbon-protected magnetic nanoparticles are usually sintered as a non-dispersible aggregation. We have successfully synthesized discrete, dispersible, and uniform carbon-protected magnetic nanoparticles via a precise surface/interface nano-engineering approach. Remarkably, the nanoparticles possess excellent water-dispersibility, biocompatibility, a high T2 relaxivity coefficient （384 mM^-1·s^-1）, and a high photothermal heating effect. Furthermore, they can be used as multifunctional core components suited for future extended investigation in early diagnosis, detection and therapy, catalysis, separation, and magnetism.

关键词： magnetic nanoparticles carbon Fe3O4 magnetic resonanceimaging (MRI) colloidal suspensions photothermal therapy

Fate Processes of Chlorobenzenes in Soil and Potential Remediation Strategies: A Review

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Pedosphere 2017年第3期27卷 407-420页

作者： ferdi BRAHUSHI Fredrick Orori KENGARA SONG Yang JIANG Xin Jean Charles MUNCH WANG Fang Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil Science Chinese Academy of Sciences Department of Agroenvironment and Ecology Agricultural University of Tirana Department of Chemistry Maseno University Center of Life and Food Sciences Technical University Munich

Chlorobenzenes （CBs） are a group of organic pollutants that pose a high environmental risk due to their toxicity, persistence and possible transfer in the food chain. Available data in literature show that CBs axe detected in different environmental compartments such as soil, water, air and sediment. The widespread presence of CBs in the environment is related to their former extensive use in agriculture and industry. Some CBs are ranked in the list of priority pollutants by the Stockholm Convention, and their reduction or elimination from the environment is therefore of high importance. Environmental risk assessment of CBs requires knowledge on the role and importance of the main environmental fate processes, especially in soil. Furthermore, development of remediation strategies for reduction or elimination of CBs from the environment is related to the enhancement of fate processes that increase their dissipation in various environmental compartments. The main objectives of the current review were to present up-to-date data on fate processes of CBs in the soil environment and to explore possible remediation strategies for soils contaminated with CBs. Dechlorination of highly-chlorinated benzenes is the main degradation pathway under anaerobic conditions, leading to the formation of lower-chlorinated benzenes. Biodegradation of lower-chlorinated benzenes is well documented, especially by strains of adapted or specialized microorganisms. Development of techniques that combine dechlorination of highly-chlorinated benzehes with biodegradation or biomineralization of lower-chlorinated benzenes can result in useful tools for remediation of soils contaminated with CBs. In addition, immobilization of CBs in soil by use of different amendments is a useful method for reducing the environmental risk of CBs.

关键词： biodegradation chlorinated benzenes environmental risk immobilization mineralization organic pollutant reductivedechlorination

Preface to Special Issue of Chinese Journal of Catalysis on the 2nd International Congress on Catalysis for Biorefineries （CatBior 2013）

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催化学报 2014年第5期35卷 601-601页

作者： Tao Zhang Avelino Corma ferdi Schüth Dalian Institute of Chemical Physics Chinese Academy of Sciences Universidad Politecnica de Valencia Department of Heterogeneous Catalysis Max-Planck-Institut fur Kohlenforschung

Today’s society is facing significant challenges from the depletion of oil reserves and the increase of CO;*** may provide a possible solution to this dilemma as it opens a new way to the sustainable production of fuels and chemicals from vast but nonfood renewable *** is expected to be a chief player in pursuit of new biorefinery technologies,just as it has been in the oil-refinery *** order to provide an ideal forum to present and discuss the state-of-the-art of the catalytic technologies in biomass processing,the International Congress on Catalysis for Biorefineries（CatBior）was initiated in 2011 in *** congress

关键词：生物反应器催化国际大会炼制二氧化碳排放量学报中国可持续生产

History of Semiconductor in relation to the power supplies

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History of Semiconductor in relation to the power supplies

Significance of IL-1Ra and IL-6 gene variants in Turkish patients with Crimean-Congo hemorrhagic fever

第四届粤港澳大湾区真空科技创新发展论坛暨2020年广东省真空学会学术年会

作者： Kamel ferdi 深圳市恒运昌真空技术有限公司

The Invention of the Transistor in 1947,along with the electrical conductivity of semiconducting materials,herald in the development of ICs-Integrated Circuits and evolution of the semiconductor *** the 1970 s till the present,following Moore’s Law of doubling the number of transistors density in the IC every 18-24 months,we have witnessed how it has helped drove much of the changes in the supporting technologies as well.

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Asian Pacific Journal of Tropical Biomedicine 2019年第2期9卷 85-90页

作者： Umut Safiye Say Coskun Ayse Feyda Nursal ferdi Gunes Aydin Rustemoglu Abdullah Yayli Nevin Karakus Huseyin Sener Barut Serbulent Yigit Tokat Gaziosmanpasa University Medicine FacultyDepartment of Medical Microbiology Hitit University Medicine FacultyDepartment of Medical Genetics Obstetrics and Pediatrics Hospital Clinic of Infectious Disease Tokat Gaziosmanpasa University Medicine FacultyDepartment of Medical Biology Tokat Gaziosmanpasa University Medicine FacultyMicrobiology Laboratory Tokat Gaziosmanpasa University Medicine FacultyDepartment of Infectious Disease

Objective: To investigate the association between IL-1 Ra variable number of tandem repeat(rs2234663), IL-6-597 GA(rs1800797), IL-6-572 GC(rs1800796) and the risk of CrimeanCongo hemorrhagic fever(CCHF) in the Turkish patients. Methods: This study included 50 patients infected with CCHF and 50 healthy controls. These variants were genotyped using polymerase chain reaction and/or restriction fragment length polymorphism method. Results: The distribution of the IL-6-572 GC genotypes and alleles varied significantly between the patients and the controls. The subjects carrying IL-6-572 GC GG genotype and G allele had increased risk of developing CCHF compared to the control group(P=0.006, P=0.014, respectively). IL-6-572 GC GC genotype was higher in the controls than the patients(P=0.006). For the triple genotype combinations, the 1/2-GC-GG genotype combination was detected more frequently in the control group than CCHF patients(P=0.016). IL-6(-572/-597) GG-GG genotype was significantly higher in the patient group(P=0.015), while the GC-GG genotype was significantly lower in the patient group(P=0.005). Additionally, the G-G haplotype was significantly higher in the patient group(P=0.042), whereas C-G was found to be significantly lower in the patients than the control group(P=0.037). Conclusions: The results of this study suggest the IL-6-572 GC variant might be genetic markers of sensitivity to CCHF in the Turkish population and may facilitate greater protection against the disease.

关键词： Crimean-Congo hemorrhagic fever IL-1Ra IL-6 Variable number of tandem repeat -572GC -597GA

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多模光纤微弯曲损耗的理论分析及应用

北京邮电大学学报 1994年第1期17卷 56-60页

作者：刘杰 ferdi.,P 北京邮电大学应用科学技术系

简要分析了多模光纤对微弯曲所引起的传输损耗的灵敏度，从理论和实验两方面说明了微弯曲损耗所取决的因素，并在实验中采用了光时域反射仪（ＯＴＤＲ）技术，结果表明，利用多模光纤的微弯曲损耗特性，可以实现各类理想的光纤传感器．

关键词：光纤通信弯曲损耗理论分析