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Chinese Chemical Letters 2006年第2期17卷 243-246页

作者： Ayse ERCAG Sema Oztürk YILDIRIM mehmet akkurt Mahmure Ustün OZGUR Frank W. HEINEMANN Istanbul University Engineering Faculty Chemistry Department Avcilar Istanbul Turkey 34320 Department of Physics Faculty of Arts and Sciences Erciyes University Kayseri Turkey 38039 Yildiz Technical University Faculty of Arts and Sciences Chemistry Department Davutpasa Istanbul Turkey 34210 Institut für Inorganische Chemie UniversittErlangen-Nürnberg Egerlandstrasse 1 D-91058 Erlangen Germany

Schiff base ligand （HL） derived from 4-hexylaniline with isatin （1H-indole-2,3-dione） and its complexes with Cu（Ⅱ）, Ni（Ⅱ） were prepared and characterized by analytical, spectroscopic （IR, UV-Vis, Mass） techniques, electrical conductivity, magnetic and thermal measurements. The crystal and molecular structure of [Cu（HL）2Cl2] was determined by a single-crystal X-ray diffraction study. The molecular structure of the title compound has an inversion center on the Cu atom.

关键词： Mononuclear Cu(Ⅱ) and Ni(Ⅱ) complexes isatin-anilines Schiff base crystal structure.

Effective Atomic Numbers for Fe-Mn Alloy Using Transmission Experiment

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Chinese Physics Letters 2007年第10期24卷 2812-2814页

作者： Iskender akkurt Department of Physics Art and Science Faculty Suleyman Demirel University Isparta Turkey

The effective atomic numbers （Zeff ） and effective electron density （Ne ） for Fe-Mn alloy with different Mn contents are calculated using the mass attenuation coefficients μ/p obtained via XCOM in the photon energy range of i keV-1 GeV. The results are compared with the values measured at the photon energy of 662, 1170 and 1332keV.

关键词： ATTENUATION COEFFICIENTS BARITE

Orientation in Nematic Liquid Crystals Doped with Orange Dyes and Effect of Carbon Nanoparticles

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Chinese Journal of Chemical Physics 2010年第3期23卷 368-372,I0002页

作者： Ahmet Alicilar Fatih akkurt Nihan Kaya 加辛大学工学院化学工程系马尔泰佩安卡拉06570

Some properties of nematic liquid crystal E7 doped with two disperse orange dyes used together and effect of addition of carbon nanoparticles （single walled carbon nanotube or fullerene C60） on them were studied. Two dyes （disperse orange 11 and 13） having high solubility and order parameter were used as co-dopants. A notable increase in order parameter was obtained comparing to that of liquid crystal doped with single dye. When carbon nanoparticles were used as dopant, a decrease in order parameter was observed at low temperatures while it increased at high temperatures. When applied voltage changed, the order parameter abruptly increased in its threshold value and saturated in higher voltages as expected. An appreciable change in textures was not observed with addition of dopants. This addition gave rise to an increase in nematic-isotropic phase transition temperatures compared with that of pure liquid crystal.

关键词： Liquid crystal Disperse orange dye Carbon nanoparticle Order parameter

Effect of the Mixing Structure Parameters of a Self-reflux Burner on Combustion Characteristics and NO_(x)Emission

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Journal of Thermal Science 2021年第4期30卷 1224-1236页

作者： XU Qian SHEN Meng SHI Kejian LIU Zhihui akkurt Nevzat XIONG Yaxuan LIU Lin FENG Junxiao WANG Jiulong School of energy and environmental engineering Shunde Graduate SchoolUniversity of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory of Energy Conservation and Emission Reduction for Metallurgical Industry Beijing 100083China Department of Mechanical Engineering Munzur UniversityTunceli 62000Turkey Key Laboratory of HVAC Beijing University of Civil Engineering and ArchitectureBeijing 100044China School of Mathematics and Physics University of Science and Technology BeijingBeijing 100083China Department of Big Data Technology and Application Development Computer Network Information CenterChinese Academy of SciencesBeijing 100190China

To solve the problem of low efficiency of NO_(x)emission reduction in self-reflux burners,this study is based on the concept of coordinated control of self-reflux burner structural and thermal *** completing the structural design and optimization of thermal parameters,we continue to adjust the two key structural parameters:the nozzle axis distance and the length of the cylindrical section,to minimize NO_(x)*** are the two parameters that chiefly affect the mixing of flue gas and fuel *** results show that increasing nozzle axis distance can delay the mixing of gas and air and create a more uniform oxygen concentration field for the combustion *** maximum combustion temperature is reduced from 1973.65 K to 1935.88 K and the volume fraction of NO_(x)in the flue gas is reduced from 188.08×10^(–6)to 143.47×10^(–6).However,compared with the nozzle axis distance,the length of the cylindrical section of the burner has little effect on the mixing of the flow *** different cylindrical section lengths,the maximum combustion temperature does not change more than 3 K,and the volume fraction of NO_(x)in the flue gas changes within 5×10~(–6).

关键词： self-reflux structure structural parameter control thermal parameter combustion characteristic NO_(x)emission

Effects of Optimized Operating Parameters on Combustion Characteristics and NO_(x)Emissions of a Burner based on Orthogonal Analysis

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Journal of Thermal Science 2021年第4期30卷 1212-1223页

作者： XU Qian akkurt Nevzat YANG Gang ZHU Lidong SHI Kejian WANG Kang ZOU Zhenwei LIU Zhihui WANG Jiulong DU Zhiwei School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory for Energy Conservation and Emission Reduction for Metallurgical Industry Beijing 100083China Department of Mechanical Engineering Munzur UniversityTunceli 62000Turkey Department of Big Data Technology and Application Development Computer Network Information CenterChinese Academy of SciencesBeijing 100190China AVIC Xinxiang Aviation Industry(group)CO. LTDHenan 453002China

To optimize the structure of the burner,improve the combustion performance,and reduce the emission of NO_(x),a self-circulating low NO_(x)combustion technology was used to design a new type of flue gas self-circulating low NO_(x)*** on previous research on the numerical model of combustion and the composition of mixed gas on combustion and NO_(x)emissions,the effect of various factors on the ejection coefficient of the flue gas self-circulating structure was analyzed using the orthogonal test method,and the burner operating parameters,such as preheating temperature and excess air coefficient,were deeply studied through the three-dimensional finite element numerical model in this *** results show that the diameter ratio of the nozzle and the length of the cylindrical section of the flue gas self-circulating structure have great influence on its ejection and mixing *** optimal ejection coefficient was ***,the amount of NO_(x)emissions greatly increased from 6.23×10^(-6)(volume fraction)at the preheating temperature 973 K to 3.5×10^(-3)at preheating temperature 1573 *** the excess air coefficient decreased from 1.2 to 1,the maximum combustion temperature decreased from 2036.3 K to 1954.22 K,and the NO_(x)emissions decreased from 352.29×10^(-6)to 159.73×10^(-6).

关键词： preheating temperature excess air coefficient self-circulating flue gas low oxygen combustion low-NO_(x)emissions

Synthesis and Characterization of Disodium Hydrogen Phosphate Dodecahydrate-Lauric-Palmitic Acid Used for Indoor Energy Storage Floor Units

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Journal of Thermal Science 2020年第2期29卷 477-485页

作者： XU Qian akkurt Nevzat ZOU Zhenwei LIU Yang FENG Junxiao YU Chuqiao DING Chong XIONG Yaxuan ZHOU Jingzhi ZANG Yong DING Yulong School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China Department of Mechanical Engineering Munzur UniversityTunceli 62000Turkey School of Information and Electronics Communication and Information SystemBeijing Institute of TechnologyBeijing 100081China School of Mathematics Taiyuan University of TechnologyTaiyuan 030024China Key Laboratory of HVAC Beijing University of Civil Engineering and ArchitectureBeijing 100044China Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China School of Mechanical Engineering University of Science and Technology BeijingBeijing 100083China

Organic and inorganic phase change materials(PCMs) are considered potential materials for thermal energy storage(TES) with different phase change characteristics. In this study, a novel organic-inorganic composite phase change material(PCM) called disodium hydrogen phosphate dodecahydrate-lauric-palmitic acid(D-LA-PACM) was prepared. Expanded graphite(EG) was selected as the support material, and the novel organic-inorganic form-stable PCM called D-LA-PAPCM/EG was prepared using the vacuum adsorption method. Differential scanning calorimetry, Fourier transform infrared spectroscopy, X-ray diffraction, leakage testing, melting and solidification cycle testing, thermal conductivity testing, scanning electron microscopy observation of the micromorphology, and other characterization methods were used to study the microstructure and morphology, thermal physical parameters, thermal conductivity, stability of the PCMs, and the comprehensive material properties of D-LA-PAPCM under the composite action of EG. Results indicated that the melting and freezing temperatures and latent heats of D-LA-PAPCM/EG were measured to be 31.6℃ and 34.3℃ and 142.9 and 142.8 J/g, respectively. Although some of the lauric-palmitic acid(LA-PA) and disodium hydrogen phosphate dodecahydrate(DHPD) separated in the multiple porous structures of EG after 1000 cycles, they could still absorb and release latent heats independently, with D-LA-PAPCM/EG still exhibiting good thermal stability. The thermal conductivity of D-LA-PAPCM/EG was 1.361 W/(m·K). Therefore, the material and thermal properties of the prepared D-LA-PAPCM/EG indicate that it could be well used as a feasible material for energy-saving phase change floor units in indoor TES systems.

关键词： organic-inorganic PCM form-stable PCM thermal property energy storage

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应用增强扩散法（EDM）确定剩余油饱和度

海上油气译丛 1999年第4期 50-62页

作者： akkurt,R 徐锦秀

增强扩散法（ＥＤＭ）是利用油和水之间的扩散差异来区分它们的核磁共振（ＮＭＲ）信号。与获取短交回时间（ＴＢ）的标准ＮＭＲ测井不同，ＥＤＭ数据是用可以增强扩散的长ＴＢ得到的。ＥＤＭ基本做法是，给出一个水的横向弛豫时间，Ｔ... 详细信息

增强扩散法（ＥＤＭ）是利用油和水之间的扩散差异来区分它们的核磁共振（ＮＭＲ）信号。与获取短交回时间（ＴＢ）的标准ＮＭＲ测井不同，ＥＤＭ数据是用可以增强扩散的长ＴＢ得到的。ＥＤＭ基本做法是，给出一个水的横向弛豫时间，Ｔ２的绝对上限，在于这个界限的Ｔ２都清楚地指出出油的存在。

关键词：增强扩散法剩余油饱和度 EDM 岩石物理

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提高多频核磁测井仪纵向分辨率的新方法

国外测井技术 2001年第6期16卷 21-25页

作者： Ridvan akkurt 钟云浩等

核磁共振测井（NMR）数据处理首先是要消除其中的固有噪声，如振铃引起的偏置（或振铃），这是通过叠加交替相位对的方法进行的，即PAPS方法。由于偏置噪声与频率相关，在不同频率上提取的相位对不能任意叠加，只能在同一频率上进行叠... 详细信息

核磁共振测井（NMR）数据处理首先是要消除其中的固有噪声，如振铃引起的偏置（或振铃），这是通过叠加交替相位对的方法进行的，即PAPS方法。由于偏置噪声与频率相关，在不同频率上提取的相位对不能任意叠加，只能在同一频率上进行叠加。这样就影响了多频核磁测井，如MRIL的测井速度和纵向分辨率。为了方便说明，多频测井仪器首先在多个频率是进行正相位采样，然后以相应的频率和顺序进行负相位采样。一个相位正负变化所对应的仪器移动距离影响其纵向分辨率，测井速度越高，分辨率越低。最近一种去除噪声的新方法得到了运用，它不同于以往的PAPS方法。新方法通过将数个数据串同时反演，NMR纵向分辨率得以明显提高。对所采集的数据序列进行优化，并运用上述方法可以提高NMR测井速度和纵向分辨率。

关键词：多频核磁测井仪纵向分辨率数据处理测井速度

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核磁共振测井新技术

国外测井技术 2009年第6期24卷 58-69页

作者： Ridvan akkurt H.Nate Bachman Chanh Cao Minh Charles Flaum Jack LaVigne Rob Leveridge Romulo Carmona Steve Crary Eric Decoster Nick Heaton Martin D.Hurlimann Wim J.Looyestijn Duncan Mardon Jim White 沙特国家石油公司美国得克萨斯州Sugar Land 委内瑞拉国家石油公司不详壳牌国际勘探与生产公司埃克森美孚上游研究公司

测量技术的先进成果结合改进的处理技术为核磁共振（NMR）测井的应用开辟了新的领域。新型NMR仪器不仅能够提供常规NMR测量信息，而且还可对流体特性进行描述。分析人员可以利用这些NMR数据对复杂地层环境下的流体类型、过渡带和生产潜... 详细信息

测量技术的先进成果结合改进的处理技术为核磁共振（NMR）测井的应用开辟了新的领域。新型NMR仪器不仅能够提供常规NMR测量信息，而且还可对流体特性进行描述。分析人员可以利用这些NMR数据对复杂地层环境下的流体类型、过渡带和生产潜力进行识别。将这些信息纳入多维可视化图后，测井分析人员可以获得更详细的地下流体物性信息。

关键词：核磁共振测井测量技术测量信息 NMR 流体特性流体类型地层环境生产潜力