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Journal of Modern Power Systems and Clean Energy 2024年第3期12卷 828-839页

作者： Yanhong Luo Haowei Hao Dongsheng Yang bowen zhou the Department of Electric Engineering Northeastern UniversityShenyang 110004China

In this paper,a novel multi-objective optimization model of integrated energy systems(IESs)is proposed based on the ladder-type carbon emission trading mechanism and refined load demand response ***,the carbon emission trading mechanism is introduced into the optimal scheduling of IESs,and a ladder-type carbon emission cost calculation model based on rewards and penalties is established to strictly control the carbon emissions of the ***,according to different response characteristics of electric load and heating load,a refined load demand response model is built based on the price elasticity matrix and substitutability of energy supply *** these basis,a multi-objective optimization model of IESs is established,which aims to minimize the total operating cost and the renewable energy source(RES)***,based on typical case studies,the simulation results show that the proposed model can effectively improve the economic benefits of IESs and the utilization efficiency of RESs.

关键词： Integrated energy system carbon emission trading load demand response renewable energy source

Distributed optimal consensus of multiagent systems with Markovian switching topologies: synchronous and asynchronous communications

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Science China(Information Sciences) 2023年第12期66卷 154-163页

作者： Juan ZHANG Huaguang ZHANG bowen zhou Xiangpeng XIE College of Information Science and Engineering Northeastern University State Key Laboratory of Synthetical Automation for Process Industries School of Internet of Things Nanjing University of Posts and Telecommunications

Considering limited system configurations and communication network bandwidths, this paper proposes two fully distributed event-triggered control schemes, namely synchronous and asynchronous communication, to solve the optimal consensus problem of linear multiagent systems(MASs) with Markovian switching topologies. The concept here is to design a novel composite dynamic event-triggered mechanism for each agent(using the information of all neighbors and one of them), based on which two fully distributed event-triggered protocols are designed to reach consensus and minimize a global convex team performance function. The effectiveness of the proposed control schemes is analyzed theoretically, that is, the optimal consensus problem can be realized, and the MAS does not exhibit Zeno behavior. Compared with existing optimal consensus results, the outstanding advantage of the proposed schemes is that a fully distributed asynchronous event-triggered communication scheme is designed, which fills the gap of optimal consensus results in this respect.

关键词： optimal consensus dynamic event-triggered control synchronous and asynchronous communications

Robust Optimal Operation of Active Distribution Network Based on Minimum Confidence Interval of Distributed Energy Beta Distribution

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Journal of Modern Power Systems and Clean Energy 2021年第2期9卷 423-430页

作者： Yanhong Luo Qiubo Nie Dongsheng Yang bowen zhou the Department of Electric Engineering Northeastern UniversityShenyang 110004China

With the gradual increase of distributed energy penetration,the traditional optimization model of distribution network can no longer guarantee the stable and efficient operation of the distribution *** order to deal with the inevitable uncertainty of distributed energy,a new robust optimal operation method is proposed for active distribution network(ADN)based on the minimum confidence interval of distributed energy Beta distribution in this ***,an ADN model is established with second-order cone to include the energy storage device,capacitor bank,static var compensator,on-load tap changer,wind turbine and ***,the historical data of related distributed energy are analyzed and described by the probability density function,and the minimum confidence interval is obtained by interval ***,via taking this minimum confidence interval as the uncertain interval,a less conservative two-stage robust optimization model is established and solved for *** simulation results for the IEEE33-bus distribution network have verified that the proposed method can realize a more stable and efficient operation of the distribution network compared with the traditional robust optimization method.

关键词： Active distribution network robust optimization Beta distribution second-order cone

Analysis of Pressure Forcings for the Vertical Turbulent Fluxes in the Convective Boundary Layer at Gray Zone Resolutions

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Journal of Meteorological Research 2023年第6期37卷 841-854页

作者： Yahua WANG Xiaoping CHENG Jianfang FEI bowen zhou College of Meteorology and Oceanography National University of Defense TechnologyChangsha410005China Key Laboratory of Electro-Optical Countermeasures Test and Evaluation Technology Luoyang471000China Key Laboratory for Mesoscale Severe Weather Ministry of EducationSchool of Atmospheric SciencesNanjing UniversityNanjing210000China

At kilometer and sub-kilometer resolutions,known as the numerical gray zone for boundary layer turbulence,the atmospheric boundary layer turbulence becomes partially resolved and partially subgrid-scale(SGS) in a numerical model,thus requiring scale-adaptive turbulence *** schemes are often built by modifying the existing parameterizations,either the planetary boundary layer(PBL) schemes or the large-eddy simulation(LES) closures,to produce the right SGS turbulent fluxes at gray zone ***,the underlying forcings responsible for the changes in the vertical turbulent fluxes are largely ignored in these *** study follows the original approach of Wyngaard(2004) and analyzes the turbulent buoyancy and momentum flux budgets,to gain a better understanding of the variations of flux forcings at gray zone *** investigation focuses on the pressure covariance term,which is one of the most dominant terms in the budget *** using the coarse-grained LES of a dry convective boundary layer(CBL) case as reference,two widely-used pressure covariance models are evaluated and optimized across the gray zone resolution *** optimized linear model is further evaluated a priori against another dry CBL case with a different bulk stability,and a shallow-cumulus-topped boundary layer *** model applies well to both cases,and notably shows good performance for the cloud *** on the analysis of the flux forcings and the optimized pressure model,a scale-adaptive turbulence model for the gray zone is derived from the steady-state flux budgets.

关键词： convective boundary layer gray zone flux budget pressure covariance turbulence parameterization

A Distributed Self-Consistent Control Method for Electric Vehicles to Coordinate Low-Carbon Transportation and Energy

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IEEE/CAA Journal of Automatica Sinica 2023年第2期10卷 554-556页

作者： bowen zhou Chao Xi Dongsheng Yang Qiuye Sun Huaguang Zhang IEEE the College of Information Science and Engineering Northeastern UniversityShenyang 110816 the Key Laboratory of Integrated Energy Optimization and Secure Operation of Liaoning Province Northeastern UniversityShenyang 110819China

Dear Editor,In this letter, a distributed self-consistent control method to coordinate low-carbon transportation and energy is proposed to address the efficient utilization of regional transportation energy and renewable energy. Specifically, taking into account the coordinated development of transportation, power grids, and renewable energy, transportation energy self-consistent, including instant self-consistent rate and power self-consistent rate。

关键词： transportation instant coordinate

Role of the Nocturnal Low-level Jet in the Formation of the Morning Precipitation Peak over the Dabie Mountains

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Advances in Atmospheric Sciences 2019年第1期36卷 15-28页

作者： Peiling FU Kefeng ZHU Kun ZHAO bowen zhou Ming XUE Key Laboratory of Mesoscale Severe Weather/Ministry of Education and School of Atmospheric Sciences Nanjing University Guangzhou Meteorological Observatory Center for Analysis and Prediction of Storms University of Oklahoma

The diurnal variation of precipitation over the Dabie Mountains(DBM) in eastern China during the 2013 mei-yu season is investigated with forecasts of a regional convection-permitting model. Simulated precipitation is verified against surface rain-gauge observations. The observed morning precipitation peak on the windward(relative to the prevailing synoptic-scale wind) side of the DBM is reproduced with good spatial and temporal accuracy. The interaction between the DBM and a nocturnal boundary layer low-level jet(BLJ) due to the inertial oscillation mechanism is shown to be responsible for this precipitation peak. The BLJ is aligned with the lower-level southwesterly synoptic-scale flow that carries abundant *** BLJ core is established at around 0200 LST upwind of the mountains. It moves towards the DBM and reaches maximum intensity at about 70 km ahead of the mountains. When the BLJ impinges upon the windward side of the DBM in the early morning, mechanical lifting of moist air leads to condensation and subsequent precipitation.

关键词： nocturnal boundary layer low-level jet diurnal variation precipitation Dabie Mountains meiyu season

Assimilating Surface Observations in a Four-Dimensional Variational Doppler Radar Data Assimilation System to Improve the Analysis and Forecast of a Squall Line Case

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Advances in Atmospheric Sciences 2016年第10期33卷 1106-1119页

作者： Xingchao CHEN Kun ZHAO Juanzhen SUN bowen zhou Wen-Chau LEE Key Laboratory for Mesoscale Severe Weather/MOE and School of Atmospheric Science Nanjing UniversityNanjing 210046China National Center for Atmospheric Research BoulderColorado 80301USA

This paper examines how assimilating surface observations can improve the analysis and forecast ability of a four- dimensional Variational Doppler Radar Analysis System （VDRAS）. Observed surface temperature and winds are assimilated together with radar radial velocity and reflectivity into a convection-permitting model using the VDRAS four-dimensional variational （4DVAR） data assimilation system. A squall-line case observed during a field campaign is selected to investigate the performance of the technique. A single observation experiment shows that assimilating surface observations can influence the analyzed fields in both the horizontal and vertical directions. The surface-based cold pool, divergence and gust front of the squall line are all strengthened through the assimilation of the single surface observation. Three experiments--assimilating radar data only, assimilating radar data with surface data blended in a mesoscale background, and assimilating both radar and surface observations with a 4DVAR cost function--are conducted to examine the impact of the surface data assimilation. Independent surface and wind profiler observations are used for verification. The result shows that the analysis and forecast are improved when surface observations are assimilated in addition to radar observations. It is also shown that the additional surface data can help improve the analysis and forecast at low levels. Surface and low-level features of the squall line-- including the surface warm inflow, cold pool, gust front, and low-level wind--are much closer to the observations after assimilating the surface data in VDRAS.

关键词： VDRAS 4-D data assimilation radar data surface data squall line

SAM struggles in concealed scenes—empirical study on “Segment Anything”

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Science China(Information Sciences) 2023年第12期66卷 278-280页

作者： Ge-Peng JI Deng-Ping FAN Peng XU bowen zhou Ming-Ming CHENG Luc VAN GOOL School of Computing Australian National University Computer Vision Lab(CVL) ETH Zurich Department of Electronic Engineering Tsinghua University College of Computer Science Nankai University

Large models open up new opportunities for artificial intelligence. In the past few months, there has been a boom in training foundation models on the vast linguistic corpus to produce amazing applications, e.g., Chat GPT, *** natural language processing and multimodal learning communities have been revolutionized. Large models’ capacity for generalization and emergent makes it easy for users to believe that large models can solve anything.

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Optimal capacity planning of combined renewable energy source-pumped storage and seawater desalination systems

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Global Energy Interconnection 2019年第4期2卷 310-317页

作者： Boyu Liu bowen zhou Dongsheng Yang Zhile Yang Mingjian Cui College of Information Science and Technology Northeastern UniversityShenyang110819LiaoningP.R.China Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen518055GuangdongP.R.China Southern Methodist University Dallas75275TXUSA

As water scarcity is becoming a growing threat to human development, finding effective solutions has become an urgent need. To make better use of water resources, seawater desalination and storage systems using renewable energy sources(RES) are designed and implemented around the world. In this paper, an optimal capacity planning method for RES-pumped storage-seawater desalination(RES-PS-D) system is introduced. The configuration of the RES-PS-D system is clarified first, after which a cost-benefit analysis is performed using all cost and benefit components. A function for determining maximum economic benefits of the RES-PS-D system is then established, and the constraints are proposed based on various limitations. The mixed-integer linear programming algorithm is applied to solve the optimal function. A case study is introduced to validate the feasibility and effectiveness of the method. The conclusion shows that the strategy is suitable for solving the configuration optimization problem, and finally both merits and defects of the method are discussed.

关键词： Renewable energy source Seawater desalination Pumped storage Maximum economic benefit

Slight Co-doping tuned magnetic and electric properties on cubic BaFeO_(3) single crystal

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Chinese Physics B 2022年第9期31卷 141-145页

作者： Shijun Qin bowen zhou Zhehong Liu Xubin Ye Xueqiang Zhang Zhao Pan Youwen Long Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Songshan Lake Materials Laboratory Dongguan 523808China

The single crystal of cubic perovskite BaFeO3 shows multiple magnetic transitions and external stimulus sensitive *** this paper,a 5%-Co-doped BaFeO_(3)(***_(0.95)Co_(0.05)O_(3))single crystal was grown by combining floating zone methods with high-pressure *** a slight Co doping has little effect on crystal structure,but significantly changes the magnetism from the parent antiferromagnetic ground state to a ferromagnetic one with the Curie temperature TC≈120 *** with the parent BaFeO3 at the induced ferromagnetic state,the saturated magnetic moment of the doped BaFe_(0.95)Co_(0.05)O_(3) increases by about 10%and reaches 3.64μB/*** and specific heat measurements show that the ferromagnetic ordering favors metallic-like electrical transport behavior for BaFe_(0.95)Co_(0.05)O_(3).The present work indicates that Co-doping is an effective method to tune the magnetic and electric properties for the cubic perovskite phase of BaFeO_(3).

关键词： floating-zone single crystal high-pressure synthesis chemical doping magnetic and electrical properties