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Numerical analysis of pipeline in J-lay problem

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第11期11卷 908-920页

作者： li-zhong wang Feng YUAN Zhen GUO ling-ling li College of Civil Engineering andArchitecture Zhejiang University Hangzhou 310058 China

The pipe configuration and internal loads along the pipeline during the pipeline laying process have long been the focus of engineers. Most researchers simplify the seabed to be rigid and the water to be calm, ignoring the pipe embedment into the seabed and the influence of ocean currents. In this paper, a novel numerical approach is proposed for the laying of pipelines in the so-called J-lay method, taking into account the importance of both pipe embedment and ocean currents. The pipeline is divided into two parts, one part suspended in water, and the other laid on the seabed. The continuity of the two parts at the touch down point (TDP) is guaranteed to make a whole. The feasibility of the model is proved by the comparison between the present model and an analytical model, which shows good agreement in both pipeline configuration and bending moment distribution. Finally, parametric study was performed to consider the influence of current velocity, water depth, top inclination angle, and seabed stiffness, and conclusions are drawn.

关键词： Pipeline J-lay method Numerical model Seabed stiffness Current velocity

The development and challenges of rechargeable non-aqueous lithium-air batteries

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International Journal of Smart and Nano Materials 2013年第1期4卷 27-46页

作者： Lei-Lei Zhang zhong-li wang Dan Xu Xin-Bo Zhang li-Min wang State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022JilinPeople’s Republic of China Graduate University of Chinese Academy of Sciences Beijing 100049People’s Republic of China

lithium-air(li-air)batteries have recently received much attention due to their extremely high theoretical energy *** significantly larger theoretical energy density of li-air batteries is due to the use of a pure lithium metal anode and the fact that the cathode oxidant,oxygen,is stored externally since it can be readily obtained from the surrounding ***,before li-air batteries can be realized as high-performance,commercially viable products there are still numerous scientific and technical challenges that must be overcome,from designing the cathode structure,to optimizing the electrolyte compositions and elucidating the complex chemical reactions that occur during charge and *** scientific obstacles that are related to the performance of li-air batteries open up an exciting opportunity for researchers from many different backgrounds to utilize their unique knowledge and skills to bridge the knowledge gaps that exist in current research *** review article is a summary of the most significant developments and challenges of practical li-air batteries and the current understanding of their chemistry.

关键词： lithium-air battery high energy density electrolyte separator catalyst

Suppression intra-channel four-wave mixing by strong dispersion management in 160 Gb/s OTDM RZ 100 km transmission

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Chinese Science Bulletin 2011年第25期56卷 2744-2747页

作者： JIA Nan li TangJun zhong KangPing wang MuGuang li Jing Key Laboratory of All-Optical Networks and Advanced Communication Networks Ministry of Education Beijing Jiaotong University Beijing100044 China

The effect of intra-channel four-wave mixing on the performance of a 160 Gb/s OTDM RZ 100 km transmission system is analyzed. Strong dispersion management to suppress the detrimental effects of intra-channel four-wave mixing is presented theoretically and verified experimentally. Results demonstrate that amplitude fluctuation and ghost pulses are well suppressed by strong dispersion management. Stable (>2 h) error-free (10-12 ) transmission over 100 km is achieved without forward-error correction, and the power penalty is ～3.6 dB.

关键词：色散管理传输系统四波混合 OTDM 通道公里 Gb 四波混频

Cu-Zn-based alloy/oxide interfaces for enhanced electroreduction of CO_(2) to C_(2+) products

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Journal of Energy Chemistry 2023年第8期83卷 90-97,I0004页

作者： Zi-Yang Zhang Hao Tian Lei Bian Shi-Ze liu Yuan liu zhong-li wang Tianjin Key Laboratory of Applied Catalysis Science&Technology School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China

The electrochemical CO_(2)reduction reaction to produce multi-carbon(C_(2+)) hydrocarbons or oxygenate compounds is a promising route to obtain a renewable fuel of high energy ***,producing C_(2+)at high current densities is still a ***,we develop a Cu-Zn alloy/Cu-Zn aluminate oxide composite electrocatalytic system for enhanced conversion of CO_(2)to C_(2+)*** Cu-Zn-Al-Layered Double Hydroxide(LDH) is used as a precursor to decompose into uniform Cu-Zn oxide/Cu-Zn aluminate *** electrochemical reduction,Cu-Zn oxide generates Cu-Zn alloy while Cu-Zn aluminate oxide remains *** alloy and oxide are closely stacked and arranged alternately,and the aluminate oxide induces the strong electron interaction of Cu,Zn and Al,creating a large number of highly active reaction interfaces composed of 0 to+3 valence metal *** the help of the interface effect,the optimized Cu_(9)Zn_(1)/Cu_(0.8)Zn_(0.2)Al_(2)O_(4)catalyst achieves a Faradaic efficiency of 88.5% for C_(2+)products at a current density of 400 mA cm^(-2)at-1.15 V versus reversible hydrogen *** in-situ Raman and attenuate total reflectance-infrared absorption spectroscopy(ATR-IRAS) spectra show that the aluminate oxide at the interface significantly enhances the adsorption and activation of CO_(2)and the dissociation of H2O and strengthens the adsorption of CO intermediates,and the alloy promotes the C-C coupling to produce C_(2+)*** work provides an efficient strategy to construct highly active reaction interfaces for industrial-scale electrochemical CO_(2)RR.

关键词： Electrochemical CO_(2)reduction reaction C_(2+)products Cu-Zn alloy Cu-Zn aluminate oxide Interface

Preparation of the radioactive source core of iodine-125 seed

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Nuclear Science and Techniques 2009年第4期20卷 231-234页

作者： HE Jiaheng JIANG lin li Xingliang zhong Wenbin wang Jing MA Zongping JIAN Yuan Institute of Nuclear Physics and Chemistry China Academy of Engineering Physics Mianyang 621900 China

Iodine-125 seed is widely used in brachytherapy of intraocular tumors,brain tumors,and prostate ***1 25I seed is prepared by depositing 125I on a silver *** work was aimed at investigating effects of different parameters on the iodine adsorption,so as to optimize the process for preparing1 25I core of the *** parameters investigated include kind and concentration of halogenation reagent,halogenation time,adsorption time,pH and carrier iodine quantity.

关键词：放射性碘-125 能级核技术

Research of multilayers in EUV, soft X-ray and X-ray

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光学精密工程 2005年第4期13卷 512-518页

作者： wang Zhan-shan wang Feng-li ZHANG zhong wang Hong-chang WU Wen-juan ZHANG Shu-min XU Yao GU zhong-xiang CHENG Xin-bin L1 Cun-xia WU Yong-rong wang Bei QIN Shu-jin CHEN ling-yan Institute of Precision Optical Engineering Department of Physics Tongji University Shanghai 200092 China

To develop beam splitters for soft X-ray laser Michelson interferometer at 13.9 nm, Mo/Si multilayers of 100 nm thickness deposited on both sides of silicon nitride were fabricated by using DC magnetron sputtering. Initial evaluation of their reflectivity and transmission showed that reflectivity and transmission were above 10% and 25%. The broadband analyzers have been designed, fabricated and characterized for 13～20 nm polarization measurements. The measured results are in good agreement with the design. The supermirrors with different angular intervals at 0.154 nm have been designed, fabricated and characterized.

关键词： EUV X射线多层性激光宽带光纤

CD24 genetic variants contribute to overall survival inpatients with gastric cancer

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World Journal of Gastroenterology 2016年第7期22卷 2373-2382页

作者： Zhi-Fang Jia li-zhong wang Xue-Yuan Cao Chuan wang Dong-Hui Cao Xing Wu li-li You Mei-Shan Jin Yin-Ping wang Bao-Sen Zhou Jing Jiang Division of Clinical Epidemiology First Hospital of Jilin UniversityChangchun 130021Jilin ProvinceChina Department of Genetics University of Alabama at BirminghamBirminghamAL 35294United States Department of Gastrointestinal Surgery First Hospital of Jilin UniversityChangchun 130021Jilin ProvinceChina Division of Pathology First Hospital of Jilin UniversityChangchun 130021Jilin ProvinceChina Department of Epidemiology School of Public HealthChina Medical UniversityShenyang 110112Liaoning ProvinceChina

AIM: To investigate the role of single nucleotide polymorphisms(SNPs) in CD24 gene in susceptibility and overall survival of gastric cancer(GC).METHODS: We genotyped 3 tagging SNPs of CD24-P-534 in the promoter region, P170 in the coding region of exon 2 and P1527 in the 3′ untranslated region- using polymerase chain reaction-restriction fragment length polymorphism in specimens from 679 histologically-confirmed GC cases, 111 gastric atrophy(GA) cases and 976 tumor-free controls. Serumimmunoglobulin G antibodies to Helicobacter pylori(H. pylori) of all subjects were detected by enzyme-linked immunosorbent assay. CD24 expression was evaluated by immunohistochemistry in 131 GC specimens. Correlations between SNPs and risk of GC or GA were shown by P values and odd ratios(ORs) with 95% confidence intervals(95%CI) compared with the most common genotype of each SNP using the unconditional logistic regression model after adjusting for age, sex and H. pylori infection. Survival within each SNP group was plotted by Kaplan-Meier method and compared by log-rank test(recessive model). Hazard ratios with 95%CIs were computed by Cox regression model after adjusting for age, sex, histological type, tumor differentiation, clinical stage and post-operational ***: All of the three loci were in Hardy-Weinberg equilibrium in the control group. Median followup time for the 600 GC patients included in the survival analysis was 36.2 mo(range, 2.1-66.7 mo; 95%CI: 34.3-36.5 mo). Patients with the P-534 A/A genotype had significantly shorter survival(HR = 1.38, 95%CI: 1.01-1.88, P = 0.042) than did the C/C or C/A genotype carriers after adjusting for age, sex, histological type, tumor differentiation, clinical stage and post-operational chemotherapy. This trend was more evident in patients who lived longer than 2.5 years(HR = 7.55, 95%CI: 2.16-26.32, P = 0.001). The P170 T/T genotype was associated with a shorter lifespan than the non-T/T genotypes, but not significantly so

关键词： Gastric cancer CD24 Single nucleotidepolymorphisms Gastric atrophy Overall survival

3-Methylcyclohexanone Processed n-Channel Organic Thin-Film Transistors Based on a Conjugated Polymer Synthesized by Direct Arylation Polycondensation

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Chinese Journal of Polymer Science 2023年第5期41卷 824-831,I0012页

作者： Dong-Sheng Yan Xu-Wen Zhang zhong-li wang Chen-Hui Xu Yi-Bo Shi Yun-Feng Deng Yang Han Yan-Hou Geng School of Materials Science and Engineering and Tianjin Key Laboratory of Molecular Optoelectronic Science Tianjin Universityand Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)Tianjin 300072China State Key Laboratory of Separation Membranes and Membrane Processes Tianjin Key Laboratory of Advanced Fibers and Energy StorageSchool of Material Science and EngineeringTiangong UniversityTianjin 300387China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhou 350207China

The solubility of a direct arylation polycondensation(DArP)synthesized conjugated polymer,i.e.,poly(3,6-bis(furan-2-yl)-2,5-bis(4-tetradecyloctadecyl)-pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione-alt-1,2-bis(3,4-d ifl uorothien-2-yl)ethene)(PFuD PP-4FTVT),in variou s organic solvents was *** polymer is soluble in 3-methylcyclohexanone(3-MC),a green solvent from peppermint oil,besides other solvents such as anisole,cyclopentyl methyl ether(CPME)and o-dichlorobenzene(o-DCB),*** on the Hansen solu bility parameters(HSP)analysis,3-MC is identified as a"marginal solvent"of *** morphology of the spin-coated films with 3-MC as the solvent strongly correlated with the solution preparation *** a 3-MC solution aged for 3 h at 70℃,n-channel organic thin-film transistors(OTFTs)with electron mobility(μe)above 1 cm^(2)·V^(-1)·s^(-1) and current on/off ratio(Ion/Ioff)higher than 105 were fabricated by *** is the first report on high mobility conjugated polymers for OTFTs processible with natu rally occurred green solvent.

关键词： Conjugated polymers Organic thin-film transistors Electron mobility Green solvent Direct arylation polycondensation

SURVEY OF AIRBORNE POLLEN IN HUBEI PROVINCE OF CHINA

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Chinese Medical Sciences Journal 2008年第4期23卷 212-217页

作者： Guang-hui liu Rong-fei Zhu Wei Zhang Wen-jing li zhong-xi wang Huan Chen Department of Allergy Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430030

Objective To study the genera and seasonal distribution of airborne pollen in Hubei province of China, and its relationship with pollinosis. Methods From November 2003 to October 2004, an airborne pollen investigation was performed in 16 chosen areas in 12 cities of Hubei province using gravity sedimentation technique. Meanwhile, univalent skin prick tests of pollens were performed and the invasion season was studied on 2 300 patients with pollinosis. Among them, 352 cases underwent the airway responsiveness measurements, and the correlation between airway responsiveness and results of pollen count was analyzed. Results A total of 61 pollen genera were observed and 257 520 pollens were collected. The peak of airborne pollen distribution occurred in two seasons each year: spring (March and April) and autumn (from August to October). The attack of pollinosis corresponded to the peak of pollen distribution. There was a significantly negative relationship between the provocation dose causing a 20% decrease of forced expiratory volume in one second (FEV1) from baseline and airborne pollen concentration (r = -0.6829, P linical prevention, diagnosis, and treatment of pollen-related allergic diseases.

关键词： airborne pollen pollinosis airway responsiveness