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Peak shaving operation optimization of high proportion new energypower generation considering wind-solar complementationand source-load coupling

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Journal of Measurement Science and Instrumentation 2019年第4期10卷 379-388页

作者： GU Yao-qin ZHANG Rui-ping WANG Ning-bo MA Ming DONG Hai-ying School of Automation&Electrical engineering Lanzhou Jiaotong UniversityLanzhou 730070China Wind Power Technology Center of State Grid Gansu Electric Power Company Lanzhou 730070China Key Laboratory for New Energy Grid-Connect Operation Control of Gansu Province Lanzhou 730070China

To optimize peaking operation when high proportion new energy accesses to power grid,evaluation indexes are proposed which simultaneously consider wind-solar complementation and source-load coupling.A typical wind-solar power output scene model based on peaking demand is established which has anti-peaking *** model uses balancing scenes and key scenes with probability distribution based on improved Latin hypercube sampling(LHS)algorithm and scene reduction technology to illustrate the influence of wind-solar on peaking *** on this,a peak shaving operation optimization model of high proportion new energy power generation is *** various operating indexes after optimization in multi-scene peaking are calculated,and the ability of power grid peaking operation is compared whth that considering wind-solar complementation and source-load ***,a case of high proportion new energy verifies the feasibility and validity of the proposed operation strategy.

关键词： wind-solar complementation source-load coupling improved Latin hypercube sampling(LHS)algorithm typical scene peak shaving operation optimization

Evaluation of the Service Performance of BeiDou+5G High-Precision Positioning in Highway Environment

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Aerospace china 2024年第2期25卷 15-20页

作者： LI Qi ZHU Peilin DING Zhenke Beijing Research Institute of Telemetry Beijing 100076 Zhejiang Highway&Water Transportation engineering Consulting corporation Hangzhou 310006 Beijing University of Posts and Telecommunications Beijing 100876

With the rapid development of intelligent connected vehicles,high-precision 3D navigation has become a key supporting *** article conducted a series of drive tests using the high-precision navigation technology of BeiDou and BeiDou+5G hybrid positioning technology,aiming to verify the positioning performance in complex highway traffic *** test was conducted on actual roads in Beijing and Hangzhou showed that the po-sitioning accuracy of BeiDou high-precision navigation reached a real-time centimeter level,with a fixed rate of about 95%and a convergence time of less than 2 *** elevation accuracy of BeiDou+5G hybrid positioning was better than 0.2 *** with three-dimensional high-precision laser point cloud maps,the overlay verification showed that the model can support three-dimensional lane level navigation,verifying the application potential of BeiDou high-precision positioning and BeiDou+5G hybrid positioning technology in the fields of autonomous driving and intel-ligent connected vehicles.

关键词： BDS satellite navigation 5G RTK

三峡大坝混凝土长期服役性能与微观结构表征（英文）

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engineering 2024年第2期 237-262页

作者： Chen Lyu Cheng Yu Chao Lu Li Pan Wenwei Li Jiaping Liu School of Materials Science and engineering Southeast University State Key Laboratory of High Performance Civil engineering Materials Sobute New Materials Co. Ltd. china Three Gorges corporation

This study investigates the long-term performance of laboratory dam concrete in different curing environments over ten years and the microstructure of 17-year-old laboratory concrete and actual concrete cores drilled from the Three Gorges *** mechanical properties of the laboratory dam concrete,whether cured in natural or standard environments,continued to improve over ***,the laboratory dam concrete exhibited good resistance to diffusion and a refined microstructure after 17 ***,curing and long-term exposure to the local natural environment reduced the frost *** analyses of the laboratory concrete samples demonstrated that moderate-heat cement and fine fly ash(FA) particles were almost fully hydrated to form compact micro structures consisting of large quantities of homogeneous calcium(alumino)silicate hydrate(C-(A)-S-H) gels and a few *** obvious interfacial transition zones were observed in the microstructure owing to the longterm pozzolanic *** dense and homogenous microstructure was the crucial reason for the excellent long-term performance of the dam concrete.A high FA volume also played a significant role in the microstructural densification and performance growth of dam concrete at a later *** concrete drilled from the dam surface exhibited a loose microstructure with higher microporosity,indicating that concrete directly exposed to the actual service environment suffered degradation caused by water and wind *** this study,both macro-performance and microstructural analyses revealed that the application of moderate-heat cement and FA resulted in a dense and homogenous microstructure,which ensured the excellent long-term performance of concrete from the Three Gorges Dam after 17 ***-term exposure to an actual service environment may lead to microstructural degradation of the concrete ***,the retained long-term dam concrete samples need to be further researched

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Synthesis, characterization and hydrotreating performance of supported tungsten phosphide catalysts

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Frontiers of Chemical Science and engineering 2008年第2期2卷 155-164页

作者： Guida SUN Cuiqing LI Zhijun ZHOU Fengyan LI Green Chemistry and New Catalytic Material Laboratory Beijing Institute of Petrochemical TechnologyBeijing 102617China

Supported tungsten phosphide catalysts were prepared by temperature-programmed reduction of their precursors(supported phospho-tungstate catalysts)in H2 and characterized by X-ray diffraction(XRD),BET,temperature-programmed desorption of ammonia(NH3-TPD)and X-ray photoelectron spectroscopy(XPS).The reduction-phosphiding processes of the precursors were investigated by thermogravimetry and differential thermal analysis(TG-DTA)and the suitable phosphiding temperatures were *** hydrodesulfurization(HDS)and hydrodenitrogenation(HDN)activities of the catalysts were tested by using thiophene,pyridine,dibenzothiophene,carbazole and diesel oil as the *** TiO2,c-Al_(2)O_(3) supports and the Ni,Co promoters could remarkably increase and stabilize active W species on the catalyst surface.A suitable amount of Ni(3%–5%),Co(5%–7%)and V(1%–3%)could increase dispersivity of the W species and the BET surface area of the WP/c-Al_(2)O_(3) *** WP/c-Al_(2)O_(3) catalyst possesses much higher thiophene HDS and carbazole HDN activities and the WP/TiO2 catalyst has much higher dibenzothiophene(DBT)HDS and pyridine HDN *** Ni,Co and V can obviously promote the HDS activity and inhibit the HDN activity of the WP/c-Al_(2)O_(3) *** G-Ni5 catalyst possesses a much higher diesel oil HDS activity than the sulphided industrial NiW/c-Al_(2)O_(3) *** general,a support or promoter in the WP/c-Al_(2)O_(3) catalyst which can increase the amount and dispersivity of the active W species can promote its HDS and HDN activities.

关键词： supported tungsten phosphide catalyst hydrodesulfurization(HDS) hydrodenitrogenation(HDN) dibenzothiophene carbazole

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面向生物医学临床应用的激光微加工功能表面

engineering 2018年第6期 172-190页

作者：胡国庆管凯卢立斌张佳茹聂璐管迎春 School of Mechanical engineering and Automation Beihang University Hefei Innovation Research Institute Beihang University Beijing Long March Space Vehicle Research Institute First Academy of the China Aerospace Corporation National engineering Laboratory of Additive Manufacturing for Large Metallic Components Beihang University Department of Oncology Center of ExcellenceBOE Hefei Digital Hospital Co.Ltd.

金属医用材料以其高强度、强抗断性、优良的导电性和良好的生物相容性等特点,在医疗器械中日益得到广泛应用。但金属医用材料表面生物性能的不足在很大程度上限制了其进一步的应用。激光微加工是一种增强材料表面性能的先进技术,本文系... 详细信息

金属医用材料以其高强度、强抗断性、优良的导电性和良好的生物相容性等特点,在医疗器械中日益得到广泛应用。但金属医用材料表面生物性能的不足在很大程度上限制了其进一步的应用。激光微加工是一种增强材料表面性能的先进技术,本文系统验证、展示激光微加工医用金属生物材料镁合金和钛合金的可行性,阐述其在细胞黏附和液体活检的应用前景。本文研究激光与材料的相互作用、材料微结构演化和表面性能,分析相关细胞行为和表面增强拉曼散射效应。实验结果表明,细胞在激光微加工表面黏附性能好,并可沿预先设计结构方向生长。此外,激光功能表面可显著增强拉曼信号,增强因子可达6×10~3以上。

关键词：激光微加工功能表面金属合金生物相容性表面增强拉曼散射

A three-dimensional numerical study on the stability of layered rock spillway tunnels in alpine canyon areas

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Deep Resources Engineering

Deep Resources engineering 2024年第2期1卷 68-81页

作者： Peng-Zhi Pan Fuyuan Tan Fengqiong Li Fudong Chi Xufeng Liu Zhaofeng Wang State Key Laboratory of Geomechanics and Geotechnical engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan 430071China East china Jiaotong University Nanchang 467200China Power china Kunming engineering corporation Limited Kunming 650000China Lancang River Clean Energy Security Green Intelligent Construction Technology Innovation Center of Xizang Autonomous Region Lasa 850008China

Rock masses in alpine canyon areas exhibit strong heterogeneity,discontinuity,and are subject to strong tectonic effects and stress unloading,leading to extremely complex distribution of in-situ *** addition,the occurrence of layered rock masses makes it more complex,with obvious anisotropic mechanical *** study proposes a comprehensive method for evaluating the stability of layered rock spillway tunnels in a hydropower station in an alpine ***,the failure criterion and mechanical model of layered rock masses considering the anisotropy induced by the bedding plane and the true triaxial stress regime were established;an inversion theory and calculation procedure for in-situ stress in alpine canyon areas were then ***,by using a self-developed numerical tool,***,the stability of the layered rock spillway tunnel in a hydropower station was numerically *** results show that,affected by geological structure and stratigraphic lithology,there is significant differentiation in the in-situ stress in alpine canyons,with horizontal tectonic stress as the main *** occurrence of layered rock masses in the region has a significant impact on the stability of surrounding rock,and the angle between the bedding strike and the tunnel axis as well as the bedding dip both exert a significant influence on the failure characteristics of the surrounding rock.

关键词： Alpine canyon areas In-situ stress inversion Layered rock mass Stability characteristics of surrounding rock Numerical simulation

Effects of Si Content on Microstructure and Mechanical Properties of 8079 Aluminum Alloy

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Research and Application of Materials Science 2020年第1期2卷 43-47页

作者： Linhui ZHANG Xiaoshu KANG Binnian ZHONG Qinghai Provincial Key Laboratory of New Light Alloys Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and FormingQinghai UniversityXining810016PR China

Because of high strength and low breaking rate,8079 aluminum alloy has become the main material of double zero aluminum ***,there are still many problems in the manufacturing process,such as broken belt,pinhole and so *** the main influencing element,Si has a great influence on the *** this work,the influences of Si with various contents on microstructural evolution and mechanical properties of 8079 aluminum alloy were analyzed by energy dispersive spectrometer(EDS),optical microscope(OM),X-Ray diffraction analyzer(XRD),universal testing machine and Vickers hardness *** results showed that the primary Si phase was tiny and dispersed in the alloy when the content of Si is less than 1.3%.As the second phases dispersion strengthening,the Si phase can improve the strength of the ***,when the Si content was too high,the Si phase increased and ***,Fe-rich phase which increased by Si decreased the fine grain strengthening and the second phases strengthening *** coarse Si phase and the Fe-rich phase are brittle phase,which are easy to become the crack source in the process of material deformation and reduce the strength and toughness of the *** mechanical property test shows that the performance of 8079 aluminum alloy is the best when the Si content is 1.3%.

关键词： 8079 aluminum alloy Si microstructure mechanical properties

航空发动机叶片激光熔覆、数控加工和超声滚压复合再制造工艺链研究

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表面工程与再制造 2024年第2期24卷 49-49页

作者： Jiawei Liang[a] Dongbo Wu[a,b] Shibo Liu[a,d] Hui Wang[a,c] Jie Yu[e] [a]Department of Mechanical engineering Tsinghua University Beijing 100084 China [b]Institute for Aero Engine Tsinghua University Beijing 100084 China [c]Research Institute of Aero-Engine Beihang University Beijing 102206 China [d]School of Electrical engineering Xinjiang University Urumqi Xinjiang 830017 China [e]AECC Aviation POWER Co. Ltd. Xi'an Shannxi 710021 China

航空发动机叶片的修复与再制造工艺在几何精度和力学性能上要求较高。因此,需要多种工艺的协同作用来完成叶片的修复工作。本文主要研究航空发动机叶片修复多道工序之间的耦合关系以及各道工序对叶片最终表面完整性的影响和作用。首先,... 详细信息

航空发动机叶片的修复与再制造工艺在几何精度和力学性能上要求较高。因此,需要多种工艺的协同作用来完成叶片的修复工作。本文主要研究航空发动机叶片修复多道工序之间的耦合关系以及各道工序对叶片最终表面完整性的影响和作用。首先,针对叶片修复的需求,提出了激光熔覆、数控加工和超声滚压的混合再制造工艺链。然后,建立了叶片混合再制造工艺链中几何特征构建与瞬态热-结构行为的数值模型。

关键词：航空发动机叶片激光熔覆表面完整性超声滚压数控加工几何精度再制造工艺修复工作

Production Planning System for the Whole Steelmaking Process of Panzhihua Iron and Steel corporation

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Journal of Iron and Steel Research International 2014年第S1期21卷 44-50页

作者： Jian-yu LONG Zhong ZHENG Xiao-qiang GAO Yong-min GONG College of Materials Science and engineering Chongqing University College of Economics and Business Administration Chongqing University Vanadium-extracting and Steel-making Plant Panzhihua Iron and Steel (Group) Co.

A production planning system is designed for the whole steelmaking process, which includes desulfurization, vanadium extraction, steelmaking and continuous casting processes of Panzhihua Iron and Steel corporation. The system is composed of modeling module, data interface module, data analysis module, static planning module, re-planning module, plan evaluation module, plan simulation module and human-computer interaction module. The system is connected with the L3 system of steel plant by using the data interface module, which can receive the real time scheduling information to make the static plan and re-plan under production disturbances. The simulation and plan evaluation function of the system can assist decision-maker to check and modify the production plan. The simulation experiments with real process data show that the system can make a feasible, executable, and effective production plan, and deal with primary random disturbances during production process timely.

关键词： production planning replanning steelmaking-continuous casting vanadium extraction whole process of steel plant