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基于TOPSIS的原油储罐风险分级预警

油气储运 2024年第6期43卷 641-648页

作者：武刚张庶鑫罗金恒李丽锋徐日段庆全王熠凡中国石油集团工程材料研究院有限公司·油气钻采输送装备全国重点实验室中国石油大学(北京)安全与海洋工程学院

[目的]原油储罐目前普遍趋向于大型化、集中化。由于原油理化性质与储罐材料构件的复杂性,造成储罐的高风险性,需提高储罐罐区风险管理能力。应用现有主流的基于风险的检验技术(Risk Based Inspection,RBI)对储罐风险进行评价较为复杂,... 详细信息

[目的]原油储罐目前普遍趋向于大型化、集中化。由于原油理化性质与储罐材料构件的复杂性,造成储罐的高风险性,需提高储罐罐区风险管理能力。应用现有主流的基于风险的检验技术(Risk Based Inspection,RBI)对储罐风险进行评价较为复杂,其对于现场数据要求较多,且设备因素评价中缺少针对储罐相关附件的影响分析。[方法]提出一种原油储罐分级预警体系,通过建立基于逼近理想解排序方法(Technique for Order Preference by Similarity to an Ideal Solution,TOPSIS)的储罐风险分级预警体系模型,实现对储罐风险的综合评估与分级预警:①建立储罐风险评估指标体系,包括人、设备、环境及管理因素4个一级指标以及若干二级、三级指标;②应用层次分析法(Analytic Hierarchy Process,AHP)对不同层次指标进行赋权,并利用TOPSIS方法对储罐进行相对贴近度计算;③根据相对贴近度结果对储罐进行风险排序与分级预警。[结果]以中国西部某原油储备库区4个原油储罐为研究对象进行风险分级预警,TOPSIS评估结果与API581-2016《基于风险的检验》、EEMUA159-2017《地上平底储罐:检查维护和修理指南》两种标准的风险评估结果基本一致,可有效预警,且实施便捷、评价指标更为全面。[结论]研究成果能够为罐区巡检、安排储罐大修周期提供合理参考。(图2,表8,参20)

关键词：原油储罐逼近理想解排序方法 TOPSIS 风险评估层次分析法分级预警

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不同饲草对杜湖杂交羊饲喂效果的影响

中国草食动物科学 2024年第1期44卷 72-75页

作者：蔡海霞王跃卿李丽峰王洁琼杨浩哲关毅博洛阳市农林科学院洛阳471000 汝阳县农业技术推广服务中心汝阳471200

为研究苜蓿、羊草、燕麦、花生秧对肉羊的饲喂效果,选择膘情中等、健康无病、体重相近的5月龄杜湖杂交一代羊60只,随机分为Ⅰ、Ⅱ、Ⅲ、Ⅳ四个试验组,每组15只羊,分别饲喂以黄贮玉米秸秆+苜蓿干草、黄贮玉米秸秆+羊草干草、黄贮玉米秸秆... 详细信息

为研究苜蓿、羊草、燕麦、花生秧对肉羊的饲喂效果,选择膘情中等、健康无病、体重相近的5月龄杜湖杂交一代羊60只,随机分为Ⅰ、Ⅱ、Ⅲ、Ⅳ四个试验组,每组15只羊,分别饲喂以黄贮玉米秸秆+苜蓿干草、黄贮玉米秸秆+羊草干草、黄贮玉米秸秆+燕麦干草、黄贮玉米秸秆+花生秧为粗饲料的日粮,育肥60 d。结果表明,试验Ⅰ组羊的日增重最高,为193.56 g,分别较试验Ⅱ、Ⅲ、Ⅳ组高8.07%(P>0.05)、5.01%(P>0.05)和12.90%(P<0.05)。试验Ⅰ组羊的屠宰率最高,达45.53%,显著高于其他3组(P<0.05)。试验Ⅰ、Ⅱ、Ⅲ组羊的只均净收益分别比Ⅳ组羊高18.86元、17.11元和-8.69元。综上,饲喂苜蓿和羊草可以明显提高杜湖杂交羊的育肥经济效益。

关键词：粗饲料杜湖杂交羊饲喂效果

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高含水油井关停后剩余油再富集速度研究

断块油气田 2024年第3期31卷 503-511页

作者：孔维军李立峰张建宁苏书震师国记黄耀张美丹中国石化江苏油田分公司采油一厂江苏扬州225265

高含水断块油藏开发末期构造高部位油井在关井一段时间后,会产生剩余油再富集现象。目前关于剩余油再富集速度的研究中,对剩余油运移过程的影响因素考虑不够全面,影响计算精度。针对该问题,在对运移中剩余油再富集受力分析的基础上建立... 详细信息

高含水断块油藏开发末期构造高部位油井在关井一段时间后,会产生剩余油再富集现象。目前关于剩余油再富集速度的研究中,对剩余油运移过程的影响因素考虑不够全面,影响计算精度。针对该问题,在对运移中剩余油再富集受力分析的基础上建立小油滴状和柱状剩余油再富集速度模型,通过正交试验确立2种剩余油再富集速度的主要敏感因素,并建立了2种剩余油再富集速度及再富集时间图版。研究结果表明:存在驱替压差时,储层渗透率为影响2种剩余油再富集速度的主控因素;当储层渗透率一定,驱替压差的增大和原油黏度的减小有利于2种剩余油再富集速度的增大;同一注采井距位置处的小油滴距离孔隙中滞留柱状剩余油越近,聚集过程中剩余油再富集时间越长,但数值上增加不多。该研究对高含水油藏剩余油再富集潜力区评价具有借鉴意义。

关键词：高含水油井剩余油再富集速度敏感因素储层渗透率

A theoretical model of electrostatic ultrasonic transducers with micro air-gap structure

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Chinese Science Bulletin 1998年第9期43卷 728-731页

作者： GE lifeng (GE li-Feng) Department of Physics, Anhui University, Hefei 230039, China Department of Physics Anhui University Hefei China

A new plate-on-air-spring model (or called short tube or DK model) for modelling the behaviour of electrostatic air-coupled ultrasonic transducers is developed and verified by accurate predictions of natural frequenci... 详细信息

关键词： electrostatic ultrasonic transducer micro air-gap structure modelling.

Hierarchical Energy Management for Economic Operation of Micro Energy Internet Systems

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Hierarchical Energy Management for Economic Operation of Mic...

Methanogenic archaea and sulfate reducing bacteria induce severe corrosion of steel pipelines after hydrostatic testing

第36届中国控制会议

作者： Wei liu Tianwen Zheng Zhenquan Sun Laijun Chen lifeng li Shengwei Mei Shaanxi Regional Electric Power Group Co.Ltd. State Key Lab of Power System Department of Electrical EngineeringTsinghua University Qinghai Key Lab of Efficient Utilization of Clean Energy(New Energy Photovoltaic Industry Research Center Qinghai University)

ISBN: (纸本)9781538629185

In this paper,the concept of micro energy internet is discussed *** achieve economic and environmental goal in the operation of micro energy internet,a hierarchical energy management system is proposed to handle the power flow exchanged between the micro energy internet and the host ***,the concept,characteristics and operational goals of micro energy internet is ***,a three-layer hierarchical optimization model concerning energy efficiency and environmental issue is proposed based on the game theory.A micro energy internet consists of an electricity network and thermal network is investigated and the effectiveness of the proposed management system is validated.

关键词： Hierarchical energy management Micro energy internet Multi objective functions

来源： cnki会议评论

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Journal of Materials Science & Technology 2020年第13期47卷 72-83页

作者： Enze Zhou Jianjun Wang Masoumeh Moradi Huabing li Dake Xu Yuntian Lou Jinheng Luo lifeng li Yulei Wang Zhenguo Yang Fuhui Wang Jessica A.Smith Shenyang National Laboratory for Materials Science Northeastern UniversityShenyang 110819China Key Laboratory for Anisotrotropy and Texture of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China Corrosion and Protection Center University of Science and Technology BeijingBeijing 100083China CNPC Tubular Goods Research Institute Xian 710065China CNPC Pipeline Construction Administration Department Beijing 100101China Institute of Metal Research Chinese Academy of SciencesShenyang 110016China Department of Biomolecular Sciences Central Connecticut State UniversityNew BritainCT 06050USA

Complex interactions within a microbial consortium can induce severe corrosion in oil *** study investigated the mechanism of microbiologically influenced corrosion(MIC)that led to failure of X52 steel pipelines after hydrostatic *** hydrostatic testing with untreated lake water and underground water were used to simulate and study the events that led to the actual *** analysis,weight loss,and several electrochemical measurements demonstrated rapid corrosion rates after hydrostatic *** of microbial community structures revealed that methanogenic archaea and sulfate reducing bacteria(SRB),introduced by the hydrotest water,formed corrosive biofilms on X52 steel coupon surfaces that induced severe pitting.

关键词： Pipeline steel Microbiologically influenced corrosion Sulfate-reducing bacteria(SRB) Pitting corrosion

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比色传感阵列在气味表征中的应用

汽车工艺与材料 2024年第5期 68-72页

作者：洪丽许明春姚其海李丽凤朱振宇张良安徽江淮汽车集团股份有限公司合肥230000 中汽数据有限公司天津300000

汽车内饰材料种类繁多、成分复杂,单车型气味物质多达上百种,极易造成车内异味污染,为提高车内空气质量,参考国内外现有的比色技术应用研究,提出了基于比色传感阵列技术的车内气味检测方法,并对整车中应用较多的内饰材料进行比色分析,... 详细信息

汽车内饰材料种类繁多、成分复杂,单车型气味物质多达上百种,极易造成车内异味污染,为提高车内空气质量,参考国内外现有的比色技术应用研究,提出了基于比色传感阵列技术的车内气味检测方法,并对整车中应用较多的内饰材料进行比色分析,准确识别了内饰材料样品的气味强度、气味类型和气味愉悦度。首次将比色传感阵列应用于车内气味客观表征中,可为汽车气味管控提供数据支持。

关键词：比色传感阵列车内空气质量气味表征

维普期刊数据库博看期刊

Evaluation of the intracellular lipid-lowering effect of polyphenols extract from highland barley in HepG2 cells

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Food Science and Human Wellness 2024年第1期13卷 454-461页

作者： Yijun Yao Zhifang li Bowen Qin Xingrong Ju lifeng Wang College of Food Science and Engineering/Collaborative Innovation Centre for Modern Grain Circulation and Safety Nanjing University of Finance and EconomicsNanjing 210023China

Active ingredients from highland barley have received considerable attention as natural products for developing treatments and dietary supplements against *** practical application,the research of food combinations is more significant than a specific food *** study investigated the lipid-lowering effect of highland barley polyphenols via lipase assay in vitro and HepG2 cells induced by oleic acid(OA).Five indexes,triglyceride(TG),total cholesterol(T-CHO),low density lipoprotein-cholesterol(LDL-C),aspartate aminotransferase(AST),and alanine aminotransferase(ALT),were used to evaluate the lipidlowering effect of highland barley *** also preliminary studied the lipid-lowering mechanism by Realtime fluorescent quantitative polymerase chain reaction(q PCR).The results indicated that highland barley extract contains many components with lipid-lowering effects,such as hyperoside and *** vitro,the lipase assay showed an 18.4%lipase inhibition rate when the additive contents of highland barley extract were 100μg/m *** intracellular lipid-lowering effect of highland barley extract was examined using 0.25 mmol/L OA-induced HepG2 *** results showed that intracellular TG,LDL-C,and T-CHO content decreased by 34.4%,51.2%,and 18.4%,*** and AST decreased by 51.6%and 20.7%compared with the untreated hyperlipidemic HepG2 cells.q PCR results showed that highland barley polyphenols could up-regulation the expression of lipid metabolism-related genes such as PPARγand Fabp4.

关键词： Highland barley Polyphenols extract lipid-lowering effect HepG2 cells

Study on hydrometallurgical process and kinetics of manganese extraction from low-grade manganese carbonate ores

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International Journal of Mining Science and Technology 2014年第4期24卷 567-571页

作者： liu Youcai lin Qingquan li lifeng Fu Jiangang Zhu Zhongsi Wang Chongqing Qian Dong School of Chemistry and Chemical Engineering Central South University

In order to utilize low-grade manganese ore resources effectively, a hydrometallurgical process was developed for manganese extraction in dilute sulfuric acid medium, and the kinetics of leaching manga- nese was also investigated. At room temperature, manganese from low-grade manganese carbonate ores was extracted by sulfuric acid leaching without reductants. During the extracting process, single-factor analysis method was used to evaluate the effects of grinding fineness, sulfuric acid concentration, liquid-to-solid ratio, agitation rate and leaching time on the leaching efficiencies of Mn and Fe. The optimal leaching conditions are determined as coarse particles of below 2 mm size （without ball-milling）, sulfuric acid concentration of 0.86 mol/L, liquid-to-solid ratio of 5：1, agitation rate of 150 r/rain and leaching for 180 min at room temperature. Under the optimal conditions, the leaching efficiencies of Mn and Fe are 96.21g and 13.35%, respectively. In addition, through the experiments at different temper- atures, it is found that the leaching process follows the shrinking core model under the conditions of changing acid concentration and intermittent reaction device. Moreover, the apparent activations of effective diffusion and chemical reaction in the kinetic model are calculated to be 18.83 and 27.15 kJ/mol, respectively.

关键词： Low-grade manganese ore Leaching Kinetics Model