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Journal of Geographical Sciences 2024年第8期34卷 1537-1557页

作者： SUN Zhaohua LI Zhiqing CHEN Li FAN Jiewei LIU Ya State Key Laboratory of Water Resources Engineering and Management Wuhan UniversityWuhan 430072China Yellow river Water&hydropower Development Group co. Ltd.Jiyuan 459017HenanChina Changjiang river Scientific Research Institute Wuhan 430010China

Floodplain lakes are important water storage areas in lowland regions that often undergo geomorphologic evolution,and timely topographic data are generally *** this study,to assess the impacts of lakebed deformation on hydraulic performance in Dongting Lake,a set of semi-empirical methods was proposed to establish performance graphs(PGs)using only hydrological *** methods were used to evaluate the changes in water level,storage capacity,and flood detention ability in Dongting Lake caused by topographic adjustment after the Three Gorges Reservoir *** methods showed that PGs can effectively simulate the water level and outflow processes of Dongting Lake with Nash-Sutcliffe efficiency co.fficients(NSEs)above 0.9.A co.parison of the estimated water level and discharge using PGs from different periods suggested that bed erosion in Dongting Lake caused water level decreases of 0.18 m and 0.32 m during the flood and dry seasons,*** the magnitude of erosion at high elevations in the lake is small,the impacts of bed adjustment on the storage capacity and flood detention ability are not currently *** study showed that the hydraulic performance of a floodplain lake can be evaluated independently of topographic data under the co.dition of no reverse flows or negative watersurface slopes.

关键词： Dongting Lake hydraulic performance graph bed adjustment semi-empirical approach backwater effect

Preparation of sodium molybdate from molybdenum co.centrate by microwave roasting and alkali leaching

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International Journal of Minerals,Metallurgy and Materials 2024年第1期31卷 91-105页

作者： Fengjuan Zhang Chenhui Liu Srinivasakannan Chandrasekar Yingwei Li Fuchang Xu School of Chemistry and Environment Yunnan Minzu UniversityKunming 650500China Chemical Engineering Department Khalifa UniversityAbu DhabiUAE yunnan Zhong Tai Technology co. Ltd.Kunming 650500China yunnan Yongchang Silico. Industry co. Ltd.Baoshan 678000China

The preparation process of sodium molybdate has the disadvantages of high energy co.sumption,low thermal efficiency,and high raw material requirement of molybdenum trioxide,in order to realize the green and efficient development of molybdenum co.centrate resources,this paper proposes a new process for efficient reco.ery of molybdenum from molybdenum co.centrate and preparation of sodium molybdate by microwave-enhanced roasting and alkali *** analysis indicated the feasibility of oxidation roasting of molybdenum *** effects of roasting temperature,holding time,and power-to-mass ratio on the oxidation product and leaching product sodium molybdate (Na_(2)MoO_(4)·2H_(2)O) were *** the optimal process co.ditions:roasting temperature of 700℃,holding time of 110 min,and power-to-mass ratio of 110 W/g,the molybdenum state of existence was co.verted from MoS_(2) to Mo *** process of preparing sodium molybdate by alkali leaching of molybdenum calcine was investigated,the optimal leaching co.ditions include a solution co.centration of 2.5 mol/L,a liquid-to-solid ratio of 2 mL/g,a leaching temperature of 60℃,and leaching solution termination at pH *** optimum co.ditions result in a leaching rate of sodium molybdate of 96.24%.Meanwhile,the co.tent of sodium molybdate reaches 94.08wt%after leaching and removing *** and aluminum impurities can be effectively separated by adjusting the pH of the leaching solution with sodium carbonate *** research avoids the shortco.ings of the traditional process and utilizes the advantages of microwave metallurgy to prepare high-quality sodium molybdate,which provides a new idea for the highvalue utilization of molybdenum co.centrate.

关键词： molybdenum metallurgy microwave oxidation roasting removing impurities sodium hydroxide leaching

Modularized and Parametric Modeling Technology for Finite Element Simulations of Underground Engineering under co.plicated Geological co.ditions

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co.puter Modeling in Engineering & Sciences 2024年第7期140卷 621-645页

作者： Jiaqi Wu Li Zhuo Jianliang Pei Yao Li Hongqiang Xie Jiaming Wu Huaizhong Liu State Key Laboratory of Hydraulics and Mountain river Engineering College of Water Resource and HydropowerSichuan UniversityChengdu610065China Research Institute of Testing and Inspection Sinohydro Bureau 7 Co.Ltd.Chengdu610213China

The surrounding geological co.ditions and supporting structures of underground engineering are often updated during co.struction,and these updates require repeated numerical *** improve the numerical modeling efficiency of underground engineering,a modularized and parametric modeling cloud server is developed by using Python *** basic framework of the cloud server is as follows:input the modeling parameters into the web platform,implement Rhino software and FLAC3D software to model and run simulations in the cloud server,and return the simulation results to the web *** modeling program can automatically generate instructions that can run the modeling process in Rhino based on the input modeling *** main modules of the modeling program include modeling the 3D geological structures,the underground engineering structures,and the supporting structures as well as meshing the geometric *** particular,various cross-sections of underground caverns are crafted as parametricmodules in themodeling *** and parametric modeling program is used for a finite element simulation of the underground powerhouse of the Shuangjiangkou hydropower *** co.plicatedmodel is rapidly generated for the simulation,and the simulation results are ***,this modularized and parametric modeling program is applicable for three-dimensional finite element simulations and analyses.

关键词： Underground engineering modularized and parametric modeling finite element method co.plex geological structure cloud modeling

Research on Regulation Method of Energy Storage System Based on Multi-Stage Robust Optimization

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Energy Engineering 2024年第3期121卷 807-820页

作者： Zaihe Yang Shuling Wang Runhang Zhu Jiao Cui Ji Su Liling Chen Electrical Dispatching and co.trol Center Yunnan Power GridKunming650011China Kunming Power Supply Bureau Yunnan Power Grid Co.Ltd.Kunming650011China Yuxi Power Supply Bureau Yunnan Power Grid Co.Ltd.Yuxi653100China

To address the scheduling problem involving energy storage systems and uncertain energy,we propose a method based on multi-stage robust *** approach aims to regulate the energy storage system by using a multi-stage robust optimal co.trol method,which helps overco.e the limitations of traditional methods in terms of time *** goal is to effectively utilize the energy storage power station system to address issues caused by unpredictable variations in environmental energy and fluctuating load throughout the *** achieve this,a mathematical model is co.structed to represent uncertain energy sources such as photovoltaic and wind *** generalized Benders Deco.position method is then employed to solve the multi-stage objective optimization *** deco.posing the problem into a series of sub-objectives,the system scale is effectively reduced,and the algorithm’s co.vergence ability is *** with other algorithms,the multi-stage robust optimization model has better eco.omy and co.vergence ability and can be used to guide the power dispatching of uncertain energy and energy storage systems.

关键词： Multi-stage robust optimization energy storage system regulation methods output uncertainty

Modeling Method of Multi-Energy Systems Based on LSTM Algorithm

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CSEE Journal of Power and Energy Systems 2024年第4期10卷 1701-1709页

作者： Di Qiu Fei Chen Dong Liu Min Cao Siyang Liu Shanghai Jiao Tong University Shanghai 200240China yunnan Power Grid co. Ltd

The development of the Energy Internet has improved the efficiency of energy utilization and promoted sustainable development of power and energy *** multi-energy system modeling co.sidering the dynamic process of transmission line is one of the key research points of Energy Internet operation *** the energy circuit theory,the lumped parameter model of natural gas pipelines is built and the dynamic characteristic parameters under the co.trol instruction are *** with dynamic characteristic parameters,the long short-term memory(LSTM)neural network is designed to fit the natural gas pipeline dynamic process into discrete linear time-varying(LTV)*** with the equations,an energy hub method is used to build a co.trol model of industrial parks with multi-energy distribution *** the rolling optimal co.trol strategy given in this paper,the model is solved by the Matlab-Yalmip solver and rolling co.trol instructions of each energy co.version unit are ***,the case study demonstrates that the LSTM neural network-based modeling method presented in this paper can accurately fit the dynamic process of a natural gas pipeline *** rolling co.trol model of the multi-energy system can improve the efficiency of energy utilization,exhibit the transmission line status co.straints during the optimization co.trol process and improve reliability of the multi-energy system operation.

关键词： Energy hub LSTM multi-energy supply system pipeline system modeling

Key technical problems of extra-high co.crete faced rock-fill dam

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Science China(Technological Sciences) 2007年第z1期50卷 20-33页

作者： MA HongQi1? & CAO KeMing2 1yunnan huaneng lancang river hydropower co., Ltd., Kunming 650011, China 2East China Investigation, Design & Research Institute, Hangzhou 310014, China yunnan huaneng lancang river hydropower co. Ltd. East China Investigation Design & Research Institute

This paper summarizes the main technical points related to 100 m-height-scale co.crete faced rock-fill dams and analyzes the main problems and their causes occurring during co.struction of 200 m-height-scale co.crete faced rock-fill dams. This paper has raised the key technical problems which need to study for co.struction of 300 m-height-scale co.crete faced rock-fill dams based on the main experiences on the extra-high co.crete faced rock-fill dams built after the year of 2000.

关键词： co.crete faced rock-fill dam extra-high dam key technology

Establishment and Application of Prevention and co.trol Techniques of New Sugarcane White Leaf Disease

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Agricultural Biotechnology 2024年第4期13卷 18-20,27页

作者： Xiaoyan WANG Ruonan QIU Hong XU Yulong JIANG Rongyue ZHANG Fengyun ZHANG Ming GONG Jinxue LEI Hongli SHAN Jie LI Yingkun HUANG Key Laboratory on Genetic Improvement of Sugarcane in yunnan Province Sugarcane Research InstituteYunnan Academy of Agricultural SciencesKaiyuan 661699China Eco.omic Crop Workstation Lancang Lahu Autonomous CountyLancang 665600China yunnan Zichen Agricultural Development co. Ltd.Xiangyun 672100China

Aiming at the basic and key technical problems in prevention and co.trol of sugarcane white leaf disease(SCWL),this study systematically overcame key technical bottleneck of prevention and co.trol of new SCWL after 10 years of co.laborative research,and achieved several innovative *** phytoplasmas newly reco.ded in China and the new subgroup of SCWL phytoplasmas(16SrXI-D)were disco.ered for the first time in yunnan,and the whole genome analysis of the epidemic subgroup was *** main transmission source of SCWL pathogens has been identified as infected seed canes,and Tettigoniella viridis and Clovia co.ifer were newly disco.ered as vectors for virus *** disease resistance of 25 main varieties was identified,and 10 co.trol varieties were *** prevention and co.trol strategy of"emphasizing early warning,strictly carrying out quarantine,blocking the vectors and co.trolling residual plants"was put forward,and a co.prehensive prevention technique was established through integration of various techniques,and standardized technical regulations were formulated for demonstration *** promotion and application of these achievements have realized scientific prevention and co.trol of SCWL,effectively curbed the spread of SCWL,and ensured the safety of sugarcane producing areas in China,achieving great eco.omic,social and eco.ogical benefits and providing technical support for high-quality development,loss reduction and efficiency improvement of China's sugar industry.

关键词： Sugarcane white leaf disease co.prehensive prevention and co.trol Application

Effects of mesoclimate and microclimate variations mediated by high altitude and row orientation on sucrose metabolism and anthocyanin synthesis in grape berries

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Horticultural Plant Journal 2024年第3期10卷 713-731页

作者： Haining Yin Zhaoxiang Wang Lin Wang Jianhong Cao Jiakui Wang Zhumei Xi co.lege of Enology Northwest A&F UniversityYanglingShaanxi 712100China Shangri-la Winery co. LTDShangri-laYunnan 674400China

Climate change and extreme weather pose significant challenges to the traditional viticulture *** high-altitude grape-producing regions with diverse orientations have shown great potential in co.ing with this ***,high-quality wine grape production may be achieved by synchronizing the meso-and *** clarify the role of high altitude and row orientation in meso-and microclimate and the response of berries to it,we evaluated seven years(2012-2018)of climate data,two years of basic grape(Cabernet Sauvignon,Vitis vinifera L.)quality,and one-year microclimate from veraison to *** co.paring two locations(Sidon 2047 m,Sinon 2208 m)in yunnan Province,China,we found that the average temperature has been stable at approximately 15℃ for seven years,with no extreme weather or,noticeable global *** light intensity(LI)in the north-south(NS)was more balanced than the east-west(EW)direction,and the east-west to the south(EW-S)canopy side was almost higher than the other *** LI was associated with high photosynthetically active radiation(PAR),ultraviolet(UV),and infrared(IR)light and vice *** north-south to the east(NS-E)and east-west to the north(EWN)sides were characterized by lower LI and higher UV and IR light,and higher total anthocyanin *** anthocyanin synthesis-related genes,for example,VvF3'H and VvF3'5'H,were highly expressed in NS-E from veraison to *** UV and IR light induced their *** study provides new insights on the role of differently orientated rows in co.trolling grape quality due to varied light *** findings are globally significant,particularly in the co.text of climate change,and offer fresh insights into berry physiological responses and decision-making for the management of existing vineyards.

关键词： Vitis vinifera L. Orientated rows Berry co.position Sugar Phenolic Light quality Solar radiation

Effect of heat treatment on microstructure and mechanical properties of selective laser-melted PH13-8Mo stainless steel

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Journal of Iron and Steel Research International 2024年第4期31卷 945-955页

作者： Yuan Zhang Xiang Liu Chang-jun Wang Chang Liu School of Material Science and Engineering Kunming University of Science and TechnologyKunming 650093YunnanChina Central Iron&Steel Research Institute co. Ltd.Beijing 100081China

PH13-8Mo stainless steel powder with high sphericity and well fluidity was prepared by the plasma rotating electrode *** formed parts with ultra-high purity were manufactured by selective laser *** tensile and impact mechanical properties of the printed parts under three heat treatment regimes were co.pared to those without heat *** microstructure,grain orientation and phase co.position were characterized by electron-backscatter diffraction,X-ray diffraction and transmission electron *** characterization results reveal that the addition of heat treatment makes the grains enlarge,and after different heat treatments,the average grain size from 1.51μm in the printed state increases to 2.78,3.09 and 2.06μm,*** formed parts are mainly co.posed of martensite and retained ***,the NiAl and M23C precipitates form,which are the major strengthening phases of PH13-8Mo stainless *** optimal heat treatment process is 925℃×1 h water co.ling(WC)+0℃×2 h air co.ling(AC)+540℃×4 h *** this heat treatment process,PH13-8Mo formed parts have the optimal co.prehensive mechanical properties:the tensile strength,yield strength and impact energy KU2 are 1492 MPa,1432 MPa and 63 J,*** strengthening and toughening via heat treatment are mainly attributed to dislocation strengthening,the formation of NiAl and M23co.precipitates and the change of volume fraction of the retained austenite.

关键词： High-strength stainless steel-Selective laser melting-Heat treatment Microstructure Mechanical property

Microstructure and Shear Properties Evolution of Minor Fe-Doped SAC/Cu Substrate Solder Joint under Isothermal Aging

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Acta Metallurgica Sinica(English Letters) 2024年第7期37卷 1279-1290页

作者： Quanzhen Li Chengming Li Xiaojing Wang Shanshan Cai Jubo Peng Shujin Chen Jiajun Wang Xiaohong Yuan Jiangsu University of Science and Technology Zhenjiang212003China R&D Center Yunnan Tin Group(Holding)Co.LtdKunming650000China The 58 Research Institute of China Electronics Technology Group CorporationWuxi214100China yunnan Precious Metals Lab Sino-Platinum Metals Co.LtdKunming650156China

Different amounts of Fe(0.005,0.01,0.03,0.05,and 0.07 wt%)were added to SAC305 to study the shear behavior damage of Fe-doped SAC solder joints under thermal loading(170℃,holding time of 0,250,500,and 750 h).The results show that during isothermal aging at 170℃,the average shear force of all solder joints decreases with increasing aging time,while the average fracture energy first increases and then decreases,reaching a maximum at 500 *** Fe doping co.ld both increase shear forces and related fracture energy,with the optimum Fe doping amount being 0.03 wt%within the entire aging *** is because the doping Fe reduces the underco.ling of the SAC305 alloy,resulting in the microstructure refining of solder *** in turn causes the microstructure changing from network structure(SAC305 joint:eutectic network+β-Sn)to a single matrix structure(0.03Fe-doped SAC305 joint:β-Sn matrix+small co.pound particles).Specifically,Fe atoms can replace some Cu in Cu_(6)Sn_(5)(both inside the solder joint and at the interface),and then form(Cu,Fe)_(6)Sn_(5) co.pounds,resulting in an increase in the elastic modulus and nanohardness of the ***,the growth of Cu_(6)Sn_(5) and Cu_(3)Sn intermetallic co.pounds(IMC)layer are inhibited by Fe doping even after the aging time prolonging,and Fe aggregates near the interface co.pound to form FeSn_(2).This study is of great significance for co.trolling the growth of interfacial co.pounds,stabilizing the microstructures,and providing strengthening strategy for solder joint alloy design.

关键词： SAC305 solder Fe doping Shear mechanical behavior Isothermal aging Interfacial intermetallic co.pounds(IMC)