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An optimal flow rate allocation model of the oilfield treated oil pipeline network

Petroleum 2024年第1期10卷 93-100页

作者： Hai Li tianyou fan Kun Wang Xueyuan Long Yu He Meng Wang Wen Cheng Qian Huang Huirong Huang Weichao Yu PetroChina Southwest Oil & Gasfield Company China Petroleum Planning & Engineering Institute School of Petroleum Engineering Chongqing University of Science and Technology PipeChina Oil & Gas Control Center

Oilfield treated oil pipeline network is the link connecting the upstream oilfields and the downstream refineries. Due to the differences in operating costs and transportation fee between different pipelines and the fluctuation in the demand and sales prices of the treated oil, there is an optimal flow allocation plan for the pipeline network to make the oilfield company obtain the highest social and economic benefit. In this study, a mixed integer nonlinear programming(MINLP) model is developed to determine the optimal flow rate allocation plan of the large-scale and complex treated oil pipeline network, and both the social and economic benefits are considered simultaneously. The optimization objective is the multi-objective which includes the largest user satisfaction and the highest economic benefit. The model constraints include the oilfield production capacity, refinery demand, pipeline transmission capacity,flow, pressure, and temperature of the node and station, and the pipeline hydraulic and thermal calculations. Python 3.7 is utilized for the programming of the off-line calculation procedure and the MINLP model, and GUROBI 9.0.2 is served as the MINLP solver. Moreover, the model is applied to a real treated oil pipeline network located in China, and three optimization scenarios are analyzed. For social benefit,the values of the user satisfaction of each refinery and the total network are 1 before and after optimization for scenarios 1, 2, and 3. For economic benefit, the annual revenue can be increased by 0.227,0.293, and 0.548 billion yuan after the optimization in scenario 1, 2, and 3, respectively.

关键词： Treated oil pipeline network Flow rate allocation Optimal User satisfaction Economic benefit

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马缨杜鹃驯化栽植技术初探

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林业科技通讯 2024年第6期 87-89页

作者：樊天佑云南省富源县富村镇农业农村综合服务中心云南曲靖655504

总结了马缨杜鹃(Rhododendron delavayi)幼苗和大树移植过程中需要注意的土壤、水肥、光照、栽前处理、移栽时间等关键性技术环节的要点,为马缨杜鹃的园林应用提供了可供借鉴的技术基础。

关键词：马缨杜鹃 Rhododendron delavayi 移植土壤水肥

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PROPAGATING CRACK IN A STRIP AND ITS EXACT SOLUTION

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Chinese Physics Letters 1990年第10期7卷 441-444页

作者： fan tianyou Research Centre of Materials Science Beijing Institute of TechnologyBeijing 100081

This letter reports some results on propagating crack in a strip,which are exact solutions with closed form and reduced to the exact solutions in static case given by the author before,as crack speed V tends to *** re... 详细信息

关键词： exact letter propagating

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EXACT SOLUTIONS OF SEMI-INFINITE CRACK IN A STRIP

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Chinese Physics Letters 1990年第9期7卷 402-405页

作者： fan tianyou Research Centre of Materials Science Beijing Institute of TechnologyBeijing 100081

This study presents a procedure for solving semi-infinite crack which is a very useful model in geophysics,seismology and *** the help of conformal transformation *** region in a physical plane onto the interior of a unit circle in a plane,any case of this kind of problems can be solved unifiedly,and some exact solutions are obtained.

关键词： interior unified conformal

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马缨杜鹃种子育苗技术研究

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东南园艺 2024年第2期12卷 145-149页

作者：樊天佑田彩仙云南省富源县富村镇综合执法队云南曲靖655504

【目的】为解决滇东地区马缨杜鹃种子繁殖出苗率和存活率低的问题。【方法】对马缨杜鹃进行浸种催芽处理、不同播种时间、不同遮荫度、不同叶面施肥的研究。【结果】马缨杜鹃种子的浸种催芽处理以50℃温水浸种处理最佳,出苗时间仅22 d;... 详细信息

【目的】为解决滇东地区马缨杜鹃种子繁殖出苗率和存活率低的问题。【方法】对马缨杜鹃进行浸种催芽处理、不同播种时间、不同遮荫度、不同叶面施肥的研究。【结果】马缨杜鹃种子的浸种催芽处理以50℃温水浸种处理最佳,出苗时间仅22 d;繁殖最佳时间是夏季6月,出苗时间短、出苗率高、整齐度好;幼苗期需要进行遮荫处理,遮荫以70%为最佳;幼苗生长初期采用沼液和矾肥水叶面喷施,补充营养的效果较好。【结论】在滇东地区,马缨杜鹃种子于50℃温水浸种、夏季6月份播种,幼苗期采用遮荫70%、叶面喷施沼液和矾肥水,可有效提高苗木存活率、促进植株长高及培育壮苗。

关键词：马缨杜鹃种子育苗遮荫施肥

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Solutions for hydrodynamics of 5-and 10-fold symmetry quasicrystals

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Applied Mathematics and Mechanics(English Edition) 2016年第10期37卷 1393-1404页

作者： Hui CHENG tianyou fan Hao WEI School of Physics Beijing Institute of TechnologyBeijing 100081China School of Science Hebei Engineering UniversityHandan 056038Hebei ProvinceChina

This study carries out a complete analysis of time-space solution of hy- drodynamics of pentagonal/decagonal quasicrystals. The behaviors of wave propagation for phonons and diffusion for phasons and coupling between phonon-phason fields are explored explicitly. Comprehensive discussion on physical time-space variations of all hydrodynamic field variables of the alloy quasicrystals is given. The computational spec- imen is simple, convenient in testing computational results, and provides a possibility that is easy to test experimentally. The quantitative results of mass density, viscosity ve- locities, phonon displacements, phason displacements, phonon stresses, phason stresses, viscosity stresses, and their time-space variations help us understand the motion of solid quasicrystals in a hydrodynamic condition （long-wavelength and low-frequency）. The analysis presented in this paper can be used for octagonal and dodecagonal quasicrys- tals and is easily extended to other two-dimensional quasicrystals and three-dimensional icosahedral quasicrystals. Some problems explored by the computational results are also discussed.

关键词： quasicrystal hydrodynamics mathematical solution finite difference method

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SEMI-ELLIPTIC SURFACE CRACK IN AN ELASTIC SOLID WITH FINITE SIZE UNDER IMPACT LOADING

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Acta Mechanica Solida Sinica 2006年第2期19卷 122-127页

作者： Guo Ruiping Liu Guanting fan tianyou Academy of Equipment Command and Technology Beijing 101416 China Department of Mathematics Inner Mongolia Normal University Huhhot 010022 China Department of Physics Beijing Institute of Technology Beijing 100081 China

In this paper a semi-elliptic surface crack problem in an elastic solid of finite size under impact loading is investigated. An analysis is performed by means of fracture dynamics and the finite element method, and a three-dimensional finite element program is developed to compute the dynamic stress intensity factor. The results reveal that the effects of the solid＇s boundary surface, crack surface, material inertia and stress wave interactions play significant roles in dynamic fracture.

关键词： surface crack solid of finite size impact loading dynamic stress intensity factor,finite element method

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AXISYMMETRIC CONTACT PROBLEM OF CUBIC QUASICRYSTALLINE MATERIALS

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Acta Mechanica Solida Sinica 2002年第1期15卷 68-74页

作者： Zhou Wangmin fan tianyou Yin Shuyuan Department of Applied Physics Beijing Institute of TechnologyBeijing 100081China Hebei Institute of Architectural Science&Technology Handan 056038China Functional Materials Division Central Iron&Steel ResearchInstituteBeijing 100081China

The axisymmetric elasticity theory of cubic quasicrystal was developed in Ref. [1]. The axisymmetric elasticity problem of cubic quasicrystal is reduced to a single higher-order partial differential equation by introducing a displacement function, based on which, the exact analytic solutions for the elastic field of an axisymmetric contact problem of cubic quasicrystalline materials are obtained for universal contact stress or contact displacement. The result shows that if the contact stress has order - 1/2 singularity on the edge of the contact domain, die contact displacement is a constant in the contact domain. Conversely, if the contact displacement is a constant, the contact stress must have order - 1/2 singularity on the edge of die contact domain.

关键词： cubic quasicrystal axisymmetry contact problem

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THREE-DIMENSIONAL ELLIPTIC CRACK UNDER IMPACT LOADING

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Acta Mechanica Solida Sinica 2001年第4期14卷 312-316页

作者： Sun Zhufeng Wu Xiangfa fan tianyou Beijing Inst Technol Res Ctr Mat Sci Beijing 100081 Peoples R China

The dynamic stress intensity factor of a three-dimensionalelliptic crack under impact loading is determined with the finiteelement method. The computation results can take into account theinfluence of time and the ratio of the wave speeds on the stressintensity factor. The present method is suitable not only forthree-dimensional dynamic crack, but also for three-dimensionaldynamic contact.

关键词： dynamic loading three-dimensional elliptic crack finite element dynamicstress intensity factor

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MOVING DEFECT WITH IRREVERSIBLE DEFORMATION ZONE AND CRITERION OF NONLINEAR DYNAMIC FRACTURE OF SOLIDS

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Chinese Physics Letters 1986年第9期3卷 405-408页

作者： fan tianyou Beijing Institute of Technology Beijing

This letter reports a fully dynamic analysis of a moving defect with a plastic *** fields of stress and displacement of this defect are determined,so that the opening displacement at the tip of the defect is *** on it... 详细信息

关键词： fracture defect displacement

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