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Application of Hydrocracking Process for Upgrading Tail Oil Quality in 1.0 Mt/a Hydrocracker Unit at SINOPEC yangzi Petrochemical Company

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China Petroleum Processing & Petrochemical Technology 2009年第1期11卷 13-17页

作者： Zhang Haichun Dong Jianwei SINOPEC yangzi Petrochemical Company Nanjing 210048 SINOPEC Research institute of Petroleum Processing

This article focuses on the hydrocracking technology for upgrading the quality of tail oil and the first commercial application of the RN-32V/RHC- 1 catalysts in the 1.0 Mt/a hydrocracker at the yangzi Petrochemical Company, which was started up successfully in September 2008. One month after start-up of the hydrocracking unit, an evaluation opera- tion has been conducted fbr assessing the catalysts performance. The technical calibration results showed that the RN- 32V/RHC-1 catalysts had high activity, and the product yield distribution was reasonable. The hydrocracker can provide abundant feedstocks for the downstream aromatic production unit and ethylene production unit.

关键词： hydrocracking upgrading tail oil quality catalysts application

Eu-Chelate Construct Ultrasensitive Time-Resolved Fluoroimmunoassay-Assay of Pepsinogen I

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Journal of Rare Earths 2006年第3期24卷 381-384页

作者：黄飚张祥瑞朱岚刘海燕蒋叶华金坚 Jiangsu institute of Nuclear Medicine Wuxi 214063 ChinaKey Laboratory of Industrial Biotechnology Ministry of Education Southern Yangzi University Wuxi 214036 China Jiangsu institute of Nuclear Medicine Wuxi 214063 China Key Laboratory of Industrial Biotechnology Ministry of Education Southern Yangzi University Wuxi 214036 China

Eu-chelate were used to construct a two-site sandwich-type assay for pepsinogen Ⅰ （PGI） with time-resolved fluoroimmunoassay （TRFIA） as a detection technique. On the noncompetitive assay, captured monoclonal antibodies （McAbs） coated on wells were directed against a specific antigenic site on the PGI. Another McAbs, called as labeling McAbs, were prepared with the Eu-chelate of N-（p-isothiocyanatobenzyl）-diethylenetriamine-N, N, N, N-tetraacetic acid and directed against a different antigenic site on the PGI. The fluorescence counts of bound Eu^3＋ -McAbs were measured with the auto DELFIA1235 system. The PGI in sera from healthy volunteers were determined by PGI-TRFIA. The within-run and between-run CVs of the PGI-TRFIA were 1.9% and 4.7%, respectively, and the recovery rate was 102.65%. The assay had a detection limit of 0.05 μg· L^-1. The PGI-TRFIA provided a linear response from 3.5 to 328 μg· L^-1. The cross-reacting rate with pepsinogen Ⅱ was negligible. The linear correlation of PGI-TRFIA and radioimmunassay measurements resulted in a correlation coefficient of 0.977. The means of healthy volunteers were 154 ±43 μg·L^-1 for serum PGI. The availability of a highly sensitive, reliable, and convenient method for quantifying PGI will allow investigations into the possible diagnostic value of this analyte in various clinical conditions, including gastric carcinoma, duodenal ulcer, gastritis and severe atrophic gastritis.

关键词： time-resolved fluoroimmunoassay pepsinogen Ⅰ Eu-chelate rare earths

Study on design pressure of in-service welding pipes

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Science China(Technological Sciences) 2006年第4期49卷 434-444页

作者： XUE Xiaolong1, ZHU Jiagui2 & SANG Zhifu1 1. College of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing 210009, China 2. Nanjing yangzi Petrochemical Maintenance and Installation Co. Ltd., Nanjing 210048, China College of Mechanical and Power Engineering Nanjing University of Technology Nanjing yangzi Petrochemical Maintenance and Installation Co. Ltd.

A method of predicting design pressure and burn-through of in-service welding pipes was established. Temperature distributions of in-service welding under variable parameters were simulated by FEM. The effect of flowing of internal media was regarded as forced convection. Based on the numerical results, design pressure of the pipe can be obtained and burn-through can be predicted. It can be concluded that the design pressure decreases with the increasing of heat input. RSF and design pressure of the pipe increase with the increasing of flow rate. There is a range in which the increase changes greatly. For in-service welding, the range should be considered adequately to determine operating condition optimally. RSF increases with the increasing of pipe wall thickness. While the thickness increases to an extent, RSF shows little increase. Accord- ing to the curves of design pressure versus different parameters, safe working pressure can be achieved.

关键词： in-service welding, heat input, flow rate, pipe wall thickness, design pressure.

Recent Advances on the Electrochemical Difunctionalization of Alkenes/Alkynes

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Chinese Journal of Chemistry 2019年第3期37卷 292-301页

作者： Haibo Mei Zizhen Yin Jiang Liu Hailong Sun Jianlin Han College of Chemical Engineering Nanjing Forestry UniversityNanjingJiangsu 210037China Nanjing Research institute of Sinopec yangzi Petrochemical Co. Ltd.NanjingJiangsu 210048China Nanjing University University of Oklahoma Texas Tech University

Electroorganic synthesis is an emerging area of high impact research in organic chemistry, which is considered as one of the green and efficient methods and attracts growing research attention. In this review, we summarized comprehensively the recent literature reports on the electrochemical oxidative difunctionalization of unsaturated C—C bonds. The reaction types described in this review included electrochemical intermolecular cyclization, electrochemical intramolecular cyclization, and electrochemical difunctionalization of alkenes/alkynes. This review focuses on the discussion of its synthetic generality for the preparation of functionalized compounds and the related electrochemical oxidative reaction mechanism.

关键词： Electrochemical Difunctionalization Alkenes/Alkynes

Biaxial tensile behavior of Ti-6Al-4V under proportional loading

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Chinese Journal of Aeronautics 2023年第5期36卷 344-362页

作者： Lin QI Yazhou GUO Kanghua JIN Huaipu KANG Yulong LI School of Aeronautics Northwestern Polytechnical UniversityXi’an 710072China Shaanxi Key Laboratory of Impact Dynamics and Engineering Applications Northwestern Polytechnical UniversityXi’an 710072China School of Civil Aviation Northwestern Polytechnical UniversitySuzhou 215699China NPU yangzi River Delta Research institute Suzhou 215400China

The biaxial tensile behavior of isotropic Ti-6Al-4 V is characterized in this paper.A novel cruciform specimen was designed and optimized to achieve uniform stress and strain distribution within the gauge *** tensile tests were conducted at three different loading ratios by the biaxial testing *** Digital Image Correlation(DIC)technique was applied to determine strain distribution,and a high-speed camera was employed to record the fracture *** Inverse Analysis(IA)approach with a combined experimental and numerical method was proposed to determine the true stresses at the gauge section of the specimen during biaxial tensile *** results indicate that the initial yield locus can be described by the Cazacu criterion accurately,whereas the Mises criterion can predict better the strengthening behavior of Ti-6Al-4 V in the first quadrant in the principal stress space.

关键词： Biaxial tensile testing Inverse analysis Strengthening behavior Ti-6Al-4V Yield locus

Effects of surface topography and specimen thickness on high-speed raindrop impact damage of CFRP laminates

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Chinese Journal of Aeronautics 2023年第6期36卷 186-200页

作者： Naidan HOU Renxi ZHAO Xuan WANG Zhongbin TANG Hao CUI Yulong LI School of Aeronautics Northwestern Polytechnical UniversityXi'an 710072China Joint International Research Laboratory of Impact Dynamics and Engineering Application Xi'an 710072China Shaanxi Key Laboratory of Impact Dynamics and Engineering Application Xi'an 710072China School of Civil Aviation Northwestern Polytechnical UniversitySuzhou 215400China NPU yangzi River Delta Research institute Suzhou 215400China

Raindrop impact erosion has been observed since early days of aviation,and can be catastrophic for exposed materials during supersonic flight.A single impact waterjet apparatus is established for mimicking drop impacts at the velocities between 350 m/s and 620 m/*** Fiber Reinforced Polymer(CFRP)laminates with three different surface morphologies and specimen thicknesses are tested here.A central region with no visible damage has been noticed,surrounded by a"failure ring"with common damage patterns including resin removal,matrix cracking,fiber breakage and mass fiber *** features are presented in the"failure ring"whose whole scope extends larger along the longitudinal direction than the transverse direction of the top *** mechanism of the resin removal is related to fiber-matrix debonding,and its onset and propagation can be facilitated by initial surface asperities with the shear action of the lateral *** cases of multiple impact,good surface quality can slow down the evolution of resin removal and fiber exposure on the CFRP surface,reducing the erosion speed and delaying the occurrence of structural damages in the subsequent *** wave dominates the occurrence of matrix cracking on the CFRP surface,and subsequently,results in material loss and peeling of the top-layer because of lateral *** the increase of the specimen thickness,both the interlaminar and intralaminar failures decrease as the impact damage mechanism changes from plate bending stress to the reflection of stress waves.

关键词： Carbon fiber reinforced plastics Failure analysis Impact testing Lateral jetting Surface roughness Waterjet

Experimental and mechanical study on the Coupled action to seepage field applied by both stress and temperature fields

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Experimental and mechanical study on the Coupled action to s...

Unusual Patterns of Neural Tube Defects in a High Risk Region of Northern China

Asian Conference on Permafrost

作者： Xiao-min Zhou Long-ge Xiao Yun-chen Zhao Civil and environmental school USTB Wuhan Command Center of yangzi river tunnel China Railway Tunnel Corporation

This paper firstly summarized the coupled field theory of temperature and stress applied to the seepage field,and then studied the function of parameter of permeability coefficient,so argued the monotonically changes with the varies of *** has been set and carried out,and the result data were regressed in the form of exponential function,in which the convergence of nonlinear numeral calculation surely is benefit.

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Biomedical and Environmental Sciences 2009年第4期22卷 340-344页

作者： GONG CHEN LI-JUN PEI JIAN HUANG XIN-MING SONG LIANG-MING LIN XUE GU JIAN-XIN WU FANG WANG JI-LEI WU JIA-PENG CHEN JU-FEN LIU RUO-LEI XIN TING ZHANG XIAO-YING ZHENG institute of Population Research Peking University Beijing 100871 China institute of Nutrition and Food Safety Chinese Center for Disease Control and Prevention Beijing 100050 China Capital institute of Pediatrics Beijing 100020 China

Objective To study the prevalence of different types of neural tube defects （NTDs） in Luliang Prefecture, Shanxi province, where the prevalence of NTDs is unusually high and the correlation between NTDs prevalence and patterns. Methods A surveillance population-based birth defects was performed in Luliang Prefecture, Shanxi province. Results The results of our study showed that the prevalence of NTDs was 2-fold higher in Luliang Prefecture than in other areas of Shanxi province. Unusual patterns of NTDs were found, however, multiple NTDs were relatively common in Luliang Prefecture, accounting for over 13% of all NTDs cases in China. Conclusion The prevalence of NTDs is associated with its patterns.

关键词： Neural tube defects Epidemiology Geographic variation

Direct extraction of equivalent circuit parameters for on-chip spiral transformers

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Journal of Semiconductors 2012年第1期33卷 149-154页

作者： Wei Jiaju Wang Zhong Li Zhiqun institute of RF-&OE-ICs Southeast University Nanjing 210096China institute of RF-&OE-ICs Southeast University Nanjing 210096China

This paper compares model differences of transformers measured in 4-port and 2-port configurations. Although 2-port configuration is more appropriate for measurement and application, it brings tremendous difficul- ties to the model＇s parameter extraction. In this paper, a physics-based equivalent circuit model and its correspond- ing direct extraction procedure are proposed for on-chip transformers. The extraction is based on the measurement of 2-port configuration instead of the 4-port type, and it can capture the model parameters without any optimiza- tion. In this procedure, a new method has been developed for the parameter extraction of the ladder circuit, which is commonly used to represent the skin effect. Thus, this method can be transferred to the modeling of other passive devices, such as on-chip transmission lines, inductors, baluns, etc. In order to verify the procedure＇s efficiency and accuracy, an on-chip interleaved transformer in a 90 nm 1P9M CMOS process has been fabricated. We compare the modeled and measured self-inductance, the quality factor, mutual reactive and resistive coupling coefficients. Excellent agreement has been found over a broad frequency range.

关键词： transformer model extraction equivalent circuit ladder skin effect