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Imitation Learning Based Real-time Decision-making of Microgrid Economic Dispatch Under Multiple Uncertainties

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Journal of Modern Power Systems and Clean Energy 2024年第4期12卷 1183-1193页

作者： Wei dong Fan zhang Meng li Xiaolun fang Qiang Yang School of Automation Hangzhou Dianzi UniversityHangzhou 310018China College of Electrical Engineering Zhejiang UniversityHangzhou 310027China

The intermittency of renewable energy generation,variability of load demand,and stochasticity of market price bring about direct challenges to optimal energy management of *** cope with these different forms of operation uncertainties,an imitation learning based real-time decision-mak-ing solution for microgrid economic dispatch is *** this solution,the optimal dispatch trajectories obtained by solving the optimal problem using historical deterministic operation patterns are demonstrated as the expert samples for imitation *** improve the generalization performance of imitation learning and the expressive ability of uncertain variables,a hybrid model combining the unsupervised and supervised learning is *** denoising autoencoder based unsupervised learning model is adopted to enhance the feature extraction of operation ***,the long short-term memory network based supervised learning model is used to efficiently characterize the mapping between the input space composed of the extracted operation patterns and system state variables and the output space composed of the optimal dispatch *** numerical simulation results demonstrate that under various operation uncertainties,the operation cost achieved by the proposed solution is close to the minimum theoretical *** with the traditional model predictive control method and basic clone imitation learning method,the operation cost of the proposed solution is reduced by 6.3% and 2.8%,respectively,overa test period of three months.

关键词： Energy management imitation learning datadriven decision economic dispatch

An improved SLAM based on RK-VIF:Vision and inertial information fusion via Runge-Kutta method

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Defence Technology（防务技术） 2023年第3期21卷 133-146页

作者： Jia-shan Cui fang-rui zhang dong-zhu Feng Cong li Fei li Qi-chen Tian School of Aerospace Science and Technology Xidian UniversityXi'an710126China China Academy of Space Technology Xian BranchXi'an710100China China Academy of Launch Vehicle Technology Beijing100076China Aerospace Information Research Institute Chinese Academy of SciencesJinan250100China

Simultaneous Localization and Mapping(SLAM)is the foundation of autonomous navigation for unmanned *** existing SLAM solutions are mainly divided into the visual SLAM(vSLAM)equipped with camera and the lidar SLAM equipped with ***,pure visual SLAM have shortcomings such as low positioning accuracy,the paper proposes a visual-inertial information fusion SLAM based on Runge-Kutta improved ***,the Inertial Measurement Unit(IMU)information between two adjacent keyframes is pre-integrated at the front-end to provide IMU constraints for visual-inertial information *** particular,to improve the accuracy in pre-integration,the paper uses the RungeKutta algorithm instead of Euler integral to calculate the pre-integration value at the next ***,the IMU pre-integration value is used as the initial value of the system state at the current frame *** combine the visual reprojection error and imu pre-integration error to optimize the state variables such as speed and pose,and restore map points’three-dimensional ***,we set a sliding window to optimize map points’coordinates and state *** experimental part is divided into dataset experiment and complex indoor-environment *** results show that compared with pure visual SLAM and the existing visual-inertial fusion SLAM,our method has higher positioning accuracy.

关键词： SLAM Runge Kutta

Reliable, environmentally friendly method for the recycling of spent Ag/α-Al2O3 catalysts using (NH4)2Ce(NO3)6

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Chinese Journal of Chemical Engineering 2018年第10期26卷 2169-2175页

作者： Xulong dong jian li Qinggui Xiao Hui zhang Tao Qi University of Chinese Academy of Sciences Beijing 100049 China National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology Institute of Process Chinese Academy of Sciences Beijing 100190 China Key Laboratory of Green Process and Engineering Institute of Process Chinese Academy of Sciences Beijing 100190 China

Traditionally,Ag-containing solid wastes are leached by nitric acid in order to recycle the noble ***,the huge amounts of emission of toxic nitrogen oxides demand the development of a new method for silver ***,considering the Ce(Ⅳ)solution could be regenerated with electrolyzation method,our group invented a novel environmentally friendly process by using Ce(Ⅳ)as the oxidant to dissolve silver from the spent Ag/ɑ-Al_2O_3 catalysts without NO_x *** find out the optimal parameters,in this work,the leaching reaction was thoroughly investigated with respect to the temperature,oxidant and HNO_3 concentrations,stirring speed,and *** optimized leaching reaction gave the leaching silver rate 99.8% in 1 *** kinetic plots suggested a shrinking core model with the internal diffusion-controlled process and the activation energy of 38.83 k J·mol^(-1).The order in which the experimental conditions influence the reaction was determined through orthogonal analysis:temperature N oxidant concentration N HNO_3 concentration N stirring speed.

关键词： Cerium ammonium nitrate (CAN) Silver Spent catalyst Leaching Kinetics

A fast space-time-domain Gaussian beam migration approach using the dominant frequency approximation

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Petroleum Science 2022年第4期19卷 1555-1565页

作者： dong-lin zhang jian-Ping Huang Ji-dong Yang Zhen-Chun li Su-Bin Zhuang Qing-Yang li School of Geosciences China University of Petroleum(East China)QingdaoShandong 266580China Pilot National Laboratory for Marine Science and Technology QingdaoShandong 266580China Geophysical Exploration Research Institute of Zhongyuan Oilfield Company PuyangHenan 457001China

The Gaussian beam migration(GBM) is a steady imaging approach, which has high accuracy and efficiency. Its implementation mainly includes the traditional frequency domain and the recent popular space-time domain. Firstly, we use the upward ray tracing strategy to get the backward wavefields. Then,we use the dominant frequency of the seismic data to simplify the imaginary traveltime calculation of the wavefields, which can cut down the Fourier transform number compared with the traditional GBM in the space-time domain. In addition, we choose an optimized parameter for the take-off angle increment of the up-going and down-going rays. These optimizations help us get an efficient space-time-domain acoustic GBM approach. Typical four examples show that the proposed method can significantly improve the computational efficiency up to one or even two orders of magnitude in different models with different model parameters and produce good imaging results with comparable accuracy and resolution with the traditional GBM in the space-time domain.

关键词： Gaussian beam Space-time-domain Fast Dominant frequency approximation

Generation of Four-Mode Cluster-Type Entangled Coherent States in Free-Traveling Optical Fields

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Communications in Theoretical Physics 2011年第3期55卷 426-430页

作者： HE Dai-Guo dong Yu-li fang jian-Xing QIAN li HU Jie School of Physical Science and Technology Suzhou University Suzhou 215006 China

In this paper, we propose an optical scheme to generate four-mode cluster-type entangled coherent states （ECSs） in free traveling optical fields by using two single-photon sources, coherent state sources, beam splitters, pho- todetectors, cross-Kerr media, and phase shifters. And the success probability of the states preparation is calculated. At last we discuss the experimental feasibility of such proposal.

关键词： cluster states coherent states beam splitters cross-Kerr media

Nitrification performance of nitrifying bacteria immobilized in waterborne polyurethane at low ammonia nitrogen concentrations

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Journal of Environmental Sciences 2011年第3期23卷 366-371页

作者： Yamei dong Zhenjia zhang Yongwei Jin Zhirong li jian Lu School of Environmental Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China School of Civil and Environmental Engineering Georgia Institute of Technology Atlanta GA 30332 USA

Suspended and waterborne polyurethane immobilized nitrifying bacteria have been adopted for evaluating the effects of environmental changes, such as temperature, dissolved oxygen （DO） concentration and pH, on nitrification characteristics under conditions of low ammonia concentrations. The results showed that nitrification was prone to complete with increasing pH, DO and temperature. Sensitivity analysis demonstrated the effects of temperature and pH on nitrification feature of suspended bacteria were slightly greater than those of immobilized nitrifying bacteria. Immobilized cells could achieve complete nitrification at low ammonia concentrations when DO was sufficient. Continuous experiments were carried out to discuss the removal of ammonia nitrogen from synthetic micropollute source water with the ammonia concentration of about 1mg/L using immobilized nitrifying bacteria pellets in an up-flow inner circulation reactor under different hydraulic retention times （HRT）. The continuous removal rate remains above 80% even under HRT 30 min. The results verified that the waterborne polyurethane immobilized nitrifying bacteria pellets had great potential applications for micro-pollution source water treatment.

关键词： nitrification characteristics waterborne polyurethane immobilized nitrifying bacteria low ammonia concentrations micro-polluted source water

Effectiveness evaluation of water-sprinkling in controlling urban fugitive road dust based on TRAKER method: A case study in Baoding, China

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Journal of Environmental Sciences 2023年第2期124卷 735-744页

作者： Yuefan zhang jianhua Chen dong li Shuang Zhu jian Gao State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China

Fugitive road dust(FRD)contributes a great deal to urban rainwater and air pollution and is commonly controlled by water-sprinkling in most Chinese ***,there is a lack of information on its *** used the Testing Re-entrained Aerosol Kinetic Emissions from Roads(TRAKER)method to monitor different types of roads in Baoding city before and within 1 hr after water-sprinkling and obtained the road dirtiness index(a)and PM concentration in the road environment(T^(∗)_(T)),to evaluate the removal efficiency for PM deposited on the road surface(ηa)and the reduction efficiency for the PM concentration in the road environment(ηPM).The results give that theηa for three types of roads is ranked:branch road(87%-–100%)>major arterial road(80%-83%)>minor arterial road(68%-77%),and the ηPM ranked:minor arterial road(70%)>branch road(46%-58%)>major arterial road(37%-53%).Theηa andηPM varied non-linearly with time and presented a quadratic *** average effective control time(ηa>0)was 62min on themajor andminor arterial roads,and much longer than 1 hr on branch *** ηPM values diminished completely by 72 min on average from the end of sprinkling for the three types of ***-sprinkling can remove PM10 particles from the road surface and reduce their concentration in the road environment more thoroughly than *** findings could be helpful for controlling urban FRD emissions more efficiently and precisely.

关键词： Fugitive road dust TRAKER Water-sprinkling Evaluation Effectiveness

Flow-accelerated corrosion behavior of 13Cr stainless steel in a wet gas environment containing CO_2

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International Journal of Minerals,Metallurgy and Materials 2018年第7期25卷 779-787页

作者： Yong li Min-dong Chen jian-kuan li Long-fei Song Xin zhang Zhi-yong liu Corrosion and Protection Centre Key Laboratory for Corrosion and Protection（MOE）National Environmental Corrosion Platform（NECP）University of Science and Technology BeijingBeijing 100083China Nuclear and Radiation Safety Center Ministry of Environmental Protection of P.R.ChinaBeijing 100082China

This work investigated the flow-accelerated corrosion （FAC） behavior of 13Cr in a wet CO2-containing environment at different flowing gas velocities mid impinging mlgles, with the natural-gas pipeline environment simulated by a self-assembled impingement jet sys- tem. Surface molphology determination, electrochemical measurements, mid hydromechaziics numerical analysis were cmlied out to study the FAC behavior. The results demonstrate that pitting corrosion was the primary mode of corrosion in 13Cr stainless steel. High-flow-rate gas destroyed the passive film mid decreased the pitting potential, resulting in more serious corrosion. The corrosion degree witk various im- pact mlgles showed the following order： 90~ 〉 60~ 〉 45~. The shear force and the electrolyte from the flowing gas were concluded to be the determinm^t factors of FAC, whereas the shear force was the main factor responsible for destroying the passive film.

关键词： flow-accelerated corrosion jet loop flowing velocity impact magle C02

A new insight into rapid oxidation of alloy 925 contaminated by oxide powder

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Rare Metals 2021年第7期40卷 1872-1880页

作者： He jiang jian-Xin dong Mai-Cang zhang jiang-Yang li Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China

Rapid oxidation takes place both in the laboratory and in industrial conditions when alloy 925 is contaminated by oxide powder,and the oxidation rate is much higher than ***,the rapid oxidation behavior and mechanism of alloy 925 were investigated by a series of comparison tests at 1160℃.It is found that the oxide powder produced during the oxidation process is mainly composed of NiCr_(2)O_(4)spinel,accompanied by NiO and NiMoO_(4).The oxide powder plays a triggering role in the rapid oxidation of alloy 925,as NiO has a strong affinity with O.A composition adjustment experiment of alloy 925 shows that rapid oxidation is the synergetic effect of Mo and Cu in the *** and Cu easily combine to form low melting point *** formation and volatilization of MoO_(3)oxide can destroy the completeness of the protective oxide *** MoO_(3)flux can dissolve protective Cr_(2)O_(3)and prevent the repair of the oxide layer and also promote the formation of nonprotective and easy-spall NiCr_(2)O_(4)*** synergetic effect of Cu and Mo in accelerating oxidation should be considered in any nickel-based alloy with a high content of Cu and Mo.

关键词： Rapid oxidation Synergetic effect Nickelbased superalloy