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Prediction Model Based on the Grey Theory for Tackling Wax Deposition in Oil Pipelines

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Journal of Natural Gas Chemistry 2005年第4期14卷 243-247页

作者： Ming Wu Shujuan Qiu Jianfeng Liu ling zhao Department of Mechanical Engineering Liaoning University of Petroleum and Chemical Technology Liaoning 113001 China Vocational and Technical College Liaoning University of Petroleum and Chemical Technology Liaoning 113001 China

Problems involving wax deposition threaten seriously crude pipelines both economically and operationally. Wax deposition in oil pipelines is a complicated problem having a number of uncertainties and indeterminations. The Grey System Theory is a suitable theory for coping with systems in which some information is clear and some is not, so it is an adequate model for studying the process of wax deposition. In order to predict accurately wax deposition along a pipeline, the Grey Model was applied to fit the data of wax deposition rate and the thickness of the deposited wax layer on the pipe-wall, and to give accurate forecast on wax deposition in oil pipelines. The results showed that the average residential error of the Grey Prediction Model is smaller than 2%. They further showed that this model exhibited high prediction accuracy. Our investigation proved that the Grey Model is a viable means for forecasting wax deposition. These findings offer valuable references for the oil industry and for firms dealing with wax cleaning in oil pipelines.

关键词： oil pipeline wax deposition grey system model forecasting

A separation column for liquid mixture based on phase transform:Experiment and simulation

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Chinese Journal of Chemical Engineering 2024年第10期74卷 144-153页

作者： Mengjie Liu Weiqun Gao Kexin Yan Yudong Li Bihong Li Jiating Zhang Weizhen Sun ling zhao State Key Laboratory of Chemical Engineering School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China

The concentric internally heat-integrated distillation column(HIDi C) has advantages of low energy consumption and high thermodynamic efficiency. However, its drawbacks of limited heat transfer area,complex internal structure, and large number of control parameters hinder its widespread industrial applications. To solve these challenges, in this work a novel sleeve-like concentric heat-integrated separation column, namely temperature-controlled phase change column(TCPC), was developed to separate liquid mixtures in a more effective and energy-saving way with reflux section being moved and trays being replaced with spiral corrugation blades. The comprehensive performances of TCPC in ethanol-water system was firstly evaluated by experiments. The results showed that TCPC performs well in ethanol-water separation due to the internal spiral corrugation significantly reducing the vapor-liquid contact in separation section. Meanwhile, compared to the concentric HIDi C, TCPC has a higher total heat transfer coefficient due to the larger heat transfer area. Computational fluid dynamics simulation reveals the internal design of TCPC inducing secondary vortices of the vapor, enhancing condensation heat transfer and separation efficiency. Further, increasing the mass flow rate within a certain range would enhance the comprehensive performance factor and lead to more effective separation.

关键词： Temperature-controlled phase change column Spiral corrugation blade Heat integration Computational fluid dynamics

Efficacy of stimulating Mingmen(GV4) and Guanyuan(CV4) on kidney Yang deficiency in rat model: laser irradiation vs traditional moxibustion

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Journal of Traditional Chinese Medicine 2022年第6期42卷 972-979页

作者： FANG Jing PAN Wen WANG Xiangyun LI Fengxing zhao ling HUANG Zouqin SHEN Xueyong Acupuncture and Tuina School Shanghai University of Traditional Chinese MedicineShanghai 201203China Department of Acupuncture Shanghai Pudong New District Hospital of Traditional Chinese MedicineShanghai 201203China Shanghai Research Center of Acupuncture&Meridian Shanghai 201203China

OBJECTIVE: To investigate the effect of 10.6-μm laser moxibustion(LM) and traditional moxibustion(TM) on kidney Yang deficiency(KYD) model rats. METHODS: Forty rats were randomly divided into normal, model, 10.6-μm LM, and TM groups. KYD was induced through intramuscular hydrocortisone injections. RESULTS: Hydrocortisone injections decreased the body weight, activity, and temperature and induced changes in the organ coefficients. Compared with the model group, TM and LM treatment prevented body weight loss and improved organ coefficients after treatment(P 0.05). TM treatment increased the temperature of Mingmen(GV4) and Guanyuan(CV4) compared to the model group(P 0.05). There was a positive correlation between Mingmen(GV4)/Guanyuan(CV4) temperature and 17-OHCS levels. CONCLUSIONS: LM and TM treatment can improve KYD symptoms, and acupoint temperature changes may be an objective indicator of KYD.

关键词： hydrocortisone temperature acupoints microcirculation Kidney-Yang deficiency laser moxibustion

Differentiation of hepatocytoid cell induced from whole-bone-marrow method isolated rat myeloid mesenchymal stem cells

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World Journal of Gastroenterology 2006年第30期12卷 4866-4869页

作者： Wei Li Su-Nan Liu Duan-De Luo Lei zhao ling-Lan Zeng Shu-ling Zhang Shu-Li Li Department of Infectious Disease Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430022 Hubei Province China

AIM： To explore the expansion and differentiation of hepatocytoid cell induced from myeloid mesenchymal stem cell （MSC） in vib＇o, in order to find suitable resource of hepatocytes for bioartiflcial liver or liver transplantation. METHODS： The rat myeloid MSC was isolated and divided into three groups which were cultured by Friedensteion method, and then were induced by culture fluid, culture fluid plus cholestatic serum and culture fluid plus hepatocyte growth factor （HGF）, respectively. Hepatocytoid cell as well as expression of CK18 and AFP was observed by immunohistochemistry. RESULTS： After the induction for 21 d, hepatocytoid cell was observed, and its expression of CK18 and AFP was detected by immunohistochemistry in MSC cultured with cholestatic serum. Furthermore, on the 35^th d, albumin mRNA was expressed in the cell, suggesting the inducing effect was similar to that by HGF.CONCLUSION： Rat myeloid MSC can differentiate into hepatocyte lineage under appropriate condition. This method is easy to operate.

关键词： Mesenchyme stem cell Hepatocytoid cell Expansion Differentiation Induction

Modification on crystallization of poly（vinylidene fluoride）（PVDF） by solvent extraction of poly（methyl methacrylate）（PMMA） in PVDF/PMMA blends

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Frontiers of Materials Science 2011年第4期5卷 388-400页

作者： Jing SUN Lu YAO Qiao-ling zhao Jin HUANG Rui SONG Zhi MA ling-Hao HE Wei HUANG Yong-Mei HAO Key Laboratory of Surface and Interface Sciences of Henan Province Zhengzhou University of Light Industry Zhengzhou 450005 China Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China College of Chemistry and Chemical Engineering Graduate University of Chinese Academy of Sciences Beijing 100049 China Laboratory of Advanced Polymer Materials Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China

The crystallization modification of poly（vinylidene fluoride）（PVDF） was investigated for the blend films of PVDF and poiy（methyl methacrylate）（PMMA）. The mass crystallinity （Xc） and further, the β-phase content （F（β）） of PVDF, were studied for the asprepared blend films with different mass ratios. In addition, the variations of Xc and F（β） were systematically probed once the PMMA component was removed from the related blend systems. DSC, FTIR and XRD measurements all indicated that 1）Xc, F（β） and even the content of a-phase （F（a）） decreased with the addition of PMMA; 2） with the extraction of PMMA, both Xc and F（β） increased while F（a） decreased. It is worth noting that the increase of Xc and F（β） depended on the relative amount of extracted PMMA （EpMMA）, i.e., the more PMMA was removed, the more Xc and F（β） increased. These results reveal the hindrance effect from the PMMA constituent to the crystallization of PVDF, and consequently, this restriction would be released when the PMMA was extracted.

关键词： poly(vinylidene fluoride) poly(methyl methacrylate) blend film crystallization

PTEN Lipid Phosphatase Activity Enhances Dengue Virus Production through Akt/FoxO1/Maf1 Signaling

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Virologica Sinica 2021年第3期36卷 412-423页

作者： Bin Liu Ting-Ting Gao Xiao-Yu Fu Zhen-Hao Xu Hao Ren Ping zhao Zhong-Tian Qi zhao-ling Qin Department of Microbiology Shanghai Key Laboratory of Medical BiodefenseSecond Military Medical UniversityShanghai 200433China Department of Nephrology The Air Force Hospital from Northern Theater of PLAShenyang 110042China

Dengue virus(DENV) is an arthropod-borne viral pathogen and a global health burden. Knowledge of the DENV-host interactions that mediate virus pathogenicity remains limited. Host lipid metabolism is hijacked by DENV for virus replication in which lipid droplets(LDs) play a key role during the virus lifecycle. In this study, we reveal a novel role for phosphatase and tensin homolog deleted on chromosome 10(PTEN) in LDs-mediated DENV infection. We demonstrate that PTEN expression is downregulated upon DENV infection through post-transcriptional regulation and, in turn, PTEN overexpression enhances DENV replication. PTEN lipid phosphatase activity was found to decrease cellular LDs area and number through Akt/FoxO1/Maf1 signaling, which, together with autophagy, enhanced DENV replication and virus production. We therefore provide mechanistic insight into the interaction between lipid metabolism and the DENV replication cycle.

关键词： Dengue virus PTEN lipid phosphatase Akt/FoxO1/Maf1 signaling Lipid metabolism

The Equivalence between Property (ω) and Weyl’s Theorem

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Journal of Mathematical Research and Exposition 2011年第4期31卷 705-712页

作者： ling ling zhao Xiao Hong CAO He Jia ZHANG College of Mathematics and Information Science Shaanxi Normal University Shaanxi 710062 P. R. China

We call T C B（H） consistent in Fredholm and index （briefly a CFI operator） if for each B ∈ B（H）, TB and BT are Fredholm together and the same index of B, or not Fredholm together. Using a new spectrum defined in view of the CFI operator, we give the equivalence of Weyl＇s theorem and property （ω） for T and its conjugate operator T^＊. In addition, the property （ω） for operator matrices is considered.

关键词： Weyl's theorem property (ω) spectrum

Review on Road Network Reliability and Trends in the Information Model

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Review on Road Network Reliability and Trends in the Informa...

Maximum entropy mobility spectrum analysis for the type-ⅠWeyl semimetal TaAs

第25届中国控制与决策会议

作者： HUANG Da-ron SHEN Li-bing zhao ling SONG Jun Institute of information science and engineering Chongqing Jiaotong University

ISBN: (纸本)9781467355339

This article focuses on three probability-based road network reliability indexes: connectivity reliability, travel time reliability and capacity reliability. Based on introducing the indexes respectively, the relationship of them is presented in detail. Then the problems exited in current research and the application prospects of future transportation are analyzed carefully. In addition, according to the inherent informational characteristics of future transportation, the essay reveals the shortcomings of the existing indexes and methods and points out that the comprehensive assessment of road network reliability should transform from a single index evaluation to a comprehensive evaluation with many influential factors in the future, and then refines a people-oriented research idea under the integrated assessment framework. Consequently, these notes provide some theoretical and technical support for reliability evaluation method of road network traffic under information model.

关键词： road network reliability connective reliability travel time reliability road network capacity reliability

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Chinese Physics B 2022年第5期31卷 588-592页

作者： Wen-Chong Li ling-Xiao zhao Hai-Jun zhao Gen-Fu Chen Zhi-Xiang Shi School of Physics and Key Laboratory of MEMS of the Ministry of Education Southeast UniversityNanjing 211189China Beijing National Laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of SciencesBeijing 100190China

Due to non-saturating magnetoresistance(MR)and the special compensation mechanism,the Weyl semimetal Ta As single crystal has attracted considerable attention in condensed matter ***,we use maximum entropy mobility spectrum analysis(MEMSA)to extract charge carrier information by fitting the experimentally measured longitudinal and transverse electric transport curves of Ta *** carrier types and the number of bands are obtained without any *** of the temperature dependence shows details of carrier property *** quantitative results explain the nonsaturated magnetoresistance and Hall sign change phenomena of TaAs.

关键词： Weyl semimetal mobility spectrum analysis magnetoresistance electrical transportation