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Multi-objective Optimal Allocation Strategy for Distributed Energy Storage in Distribution Networks Adapted to High Penetration Distributed Photovoltaics

Multi-objective Optimal Allocation Strategy for Distributed ...

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Power and Electrical Engineering (ACPEE), 5th Asia Conference on

作者： Cuiping Li Yanli Wang Yiming Chen Xuesong Qi Yunjing Liu Qian Fang Shengyuan Cui Yuming Wang Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Northeast Electric Power University Jilin China Science and Technology Section State Grid Shanghai South Power Supply Company Shanghai China Power dispatching and control center Jilin Power Supply Company Jilin China Science and Technology Section Jilin Power Supply Company Jilin China Ministry of Science and Technology Jilin Power Supply Company Jilin China

ISBN: (数字)9798350309638

ISBN: (纸本)9798350309645

High percentage of photovoltaic gain connect to the wire line, so that the electricity grid from power distribution of the receiving end of the network into a set of production, storage, distribution of multi-source complex new network, the distribution network security operation and new energy consumption pressure increases. In response to the above, this paper puts forward the distributed ES multi-objective optimization configuration strategy of distribution network adapted to the high penetration rate distributed PV. And through a county power grid practical example to certify that the ES configuration approach proposed can effectively mitigate the impact of a high proportion of PV accessed, and it can reduce the abandonment of light.

关键词： Photovoltaic systems Wires Distribution networks Production Power grids Regulation Resource management

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Detection of trace metals in water by filamentand plasma-grating-induced breakdown spectroscopy

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Advanced Photonics Nexus 2023年第1期2卷 70-79页

作者： Mengyun Hu Fangfang Li Shencheng Shi Yu Qiao Jinman Ge Xiaojun Li Heping Zeng East China Normal University State Key Laboratory of Precision SpectroscopyShanghaiChina Chongqing Institute of East China Normal University Chongqing Key Laboratory of Precision OpticsChongqingChina University of Shanghai for Science and Technology School of Optical-Electrical and Computer EngineeringEngineering Research Center of Optical Instrument and System(Ministry of Education)Shanghai Key Laboratory of Modern Optical SystemShanghaiChina China Academy of Space Technology(Xi’an) National Key Laboratory of Science and Technology on Space MicrowaveXi’anShaanxiChina Shanghai Research Center for Quantum Sciences ShanghaiChina Chongqing Institute for Brain and Intelligence Guangyang Bay LaboratoryChongqingChina

Filament-and plasma-grating-induced breakdown spectroscopy(F-GIBS)was demonstrated as an efficient technique for sensitive detection of metals in water,where plasma gratings were established through synchronized nonlinear interaction of two noncollinear filaments and an additional filament was generated with another fs laser beam propagating along their bisector.A water jet was constructed vertically to the three coplanar filaments,overcoming side effects from violent plasma explosion and bubble *** distinct regimes of different mechanisms were validated for nonlinear couplings of the third filament with plasma *** the third filament was temporally overlapped with the two noncollinear filaments in the interaction zone,all the three filaments participated in synchronous nonlinear interaction and plasma grating structures were altered by the addition of the third *** the third filament was positively or negatively delayed,the as-formed plasma gratings were elongated by the delayed third filament,or plasma gratings were formed in the presence of plasma expansion of the ahead third filament,*** F-GIBS for trace metal detection in water,significant spectral line enhancements were observed.

关键词： laser-induced breakdown spectroscopy filament and plasma-gratings induced breakdown spectroscopy filaments plasma gratings grating induced breakdown spectroscopy

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Gap and Glitch simulation for Taiji Data Challenge

Gap and Glitch Simulation for Taiji Data Challenge

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IEEE International Conference on Information Communication and Signal Processing (ICICSP)

作者： Zhang Jiafeng Peng Xiaodong Zhao Mengyuan Xu Peng Wu Pengzhan Gao Chen Ma Xiaoshan Key Laboratory of Electronics and Information Technology for Space System National Space Science Center Chinese Academy of Sciences Beijing China Institute of Mechanics Chinese Academy of Sciences Beijing China Institute of Engineering Thermophysics Chinese Academy of Sciences Beijing China

Simulating the detection process of a space-based gravitational wave (GW) measurement system is crucial for the task demonstration, design, operation and data processing. Gaps and glitches, which are common types of abnormal events in the detection process, are an important part of data simulation. This paper explores two gap models and three glitch models, provides a comprehensive overview of these models. The implementation of these models in Taiji Data, the simulation data of the Taiji program, is designed. Dedicated software modules were developed to incorporate the gap and glitch models into the simulation process. The impact of adding gap and glitch to the measurement is illustrated and analyzed. Finally, the time-series simulation detection data of space GWs that integrates gap and glitch models has been obtained, providing support for promoting the improvement of the detection data processing capabilities.

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Agricultural Fire Impacts on Brown Carbon During Different Seasons in Northeast China

SSRN

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SSRN 2023年

作者： Cheng, Yuan Cao, Xu-Bing Liu, Jiu-Meng Yu, Qin-Qin Zhang, Qiang He, Ke-Bin State Key Laboratory of Urban Water Resource and Environment School of Environment Harbin Institute of Technology Harbin150090 China Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System Science Tsinghua University Beijing100084 China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China

Brown carbon (BrC) represents not only a major component of haze pollution but also a non-negligible contributor to positive radiative forcing, making it a key species for coordinating air quality and climate policies. In China, field observations on BrC remain limited given the highly variable emission sources and meteorological conditions across different regions. Here we focused on the optical properties of BrC in a distinct but largely unexplored megacity in Northeast China, which is within a major agricultural region and experiences extremely cold winter. Agricultural fires were evident in April of 2021 and the fall of 2020, despite a toughest-ever policy on open burning. Such emissions enhanced BrC's mass absorption efficiency at 365 nm (MAE365), more efficiently by the fall fires which were inferred to have relatively high combustion efficiencies (CE). After taking CE into consideration, the relationships between MAE365 and the levoglucosan to organic carbon ratio (a measure of the significance of agricultural fire influence) roughly converged for the fire episodes of different seasons, including those identified in February and March of 2019 by a previous campaign. Agricultural fires also influenced the determination of absorption Ångström exponent (AAE), by resulting in non-linearity for BrC's absorption spectra shown on ln-ln scale. Based on three indicators developed by this study, the non-linearity was inferred to be caused by similar chromophores although the fires were characterized by various CE levels in different seasons. In addition, for the samples without significant influence of open burning, coal combustion emissions were identified as the dominant influencing factor for MAE365, whereas none solid link was found between the solution-based AAE and aerosol source. © 2023, The Authors. All rights reserved.

关键词： Light absorption

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An Adaptive Sliding Mode Terminal Guidance Method

An Adaptive Sliding Mode Terminal Guidance Method

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Chinese Automation Congress (CAC)

作者： Yichuan Zhu Na Yao Hu Fan National Key Laboratory of Science and Technology on Aerospace Intelligence Control Beijing Aerospace Automatic Control Institute Beijing China System simulation laboratory Beijing Aerospace Automatic Control Institute Beijing China The third representative office of air force equipment in Beijing area Beijing China

This article designs a sliding mode terminal guidance law for high-speed targets by modifying the approach law. Firstly, the relative motion equation of the chaser and escaper is established; Then adjust the aircraft based on the changes in the distance of the chaser and escaper and approach speed, design a self adaptive approach law, and derive the guidance law. At the same time, prove the stability of the guidance system by constructing a Lyapunov function; Finally, simulation verification was conducted. The simulation results showed that the designed guidance law can achieve the encounter between the chaser and the escaper. By comparing it with proportional guidance under different operating conditions, it was verified that the method has higher adaptability to different operating conditions, thus verifying the effectiveness of the guidance law designed in this paper and providing certain reference value for further research.

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High-responsivity solar-blind photodetector based on MOCVD-grown Si-dopedβ-Ga_(2)O_(3)thin film

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Chinese Physics B 2021年第5期30卷 595-601页

作者： Yu-Song Zhi Wei-Yu Jiang Zeng Liu Yuan-Yuan Liu Xu-Long Chu Jia-Hang Liu Shan Li Zu-Yong Yan Yue-Hui Wang Pei-Gang Li Zhen-Ping Wu Wei-Hua Tang Laboratory of Information Functional Materials and Devices School of Science&State Key Laboratory of Information Photonics and Optical CommunicationsBeijing University of Posts and TelecommunicationsBeijing 100876China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China The Engineering Research Center for Semiconductor Integrated Technology Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China China Aerospace System Simulation Technology Co. Ltd.(Beijing)Beijing 100195China College of Electronic and Optical Engineering&College of Microelectronics Nanjing University of Posts and TelecommunicationsNanjing 210023China

Si-dopedβ-Ga_(2)O_(3)films are fabricated through metal-organic chemical vapor deposition(MOCVD).Solar-blind ultraviolet(UV)photodetector(PD)based on the films is fabricated by standard photolithography,and the photodetection properties are *** results show that the photocurrent increases to 11.2 mA under 200μW·cm^(-2)254 nm illumination and±20 V bias,leading to photo-responsivity as high as 788 A·W^(-1).The Si-dopedβ-Ga2O3-based PD is promised to perform solar-blind photodetection with high performance.

关键词： Si-dopedβ-Ga_(2)O_(3) metal-organic chemical vapor deposition(MOCVD) solar-blind high responsivity

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Physical characteristics of convective and non-convective cirrus clouds from CALIPSO data over the South China Sea

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Atmospheric and Oceanic science Letters 2025年第3期18卷

作者： Weng, Haorui Han, Yong Deng, Ximing Dong, Li Liu, Yan Advanced Science & Technology of Space and Atmospheric Physics Group (ASAG) School of Atmospheric Sciences Sun Yat-sen University & Southern marine Science and Engineering Guangdong Laboratory Zhuhai China Key Laboratory of Tropical Atmosphere-Ocean System (Sun Yat-sen University) Ministry of Education Zhuhai China

Studying the characteristics and mechanisms of convective and non-convective cirrus clouds over the South China Sea is vital for their impact on regional climate dynamics, and enhancing predictive models for weather and climate forecasts. This study utilizes eight years of CALIPSO data (from March 2007 to February 2015) to investigate convective and non-convective cirrus clouds. Explicit new insights include the observation that convective cirrus cloud samples are three times more numerous than non-convective cirrus clouds. Convective cirrus clouds are associated with humid conditions and demonstrate higher ice water content (IWC) values ranging from 10⁻³ to 10⁻¹ g m⁻³, whereas non-convective cirrus clouds tend to be drier, exhibiting IWC values ranging from 10⁻⁴ to 10⁻³ g m⁻³. Both cirrus cloud types exhibit a maximum cloud fraction at 10°N. Convective cirrus reach their peak cloud fraction at an altitude of 14 km, while non-convective cirrus typically occur at altitudes between 15 and 16 km. The seasonal variability of the convective cirrus cloud fraction primarily reflects bottom-up positive specific humidity anomalies originating from convective activity, whereas the non-convective cirrus cloud fraction is influenced by top-down negative temperature anomalies. 摘要中国南海是陆地, 海洋和大气相互作用强烈的区域, 在此背景下, 深对流活动对于卷云的形成和维持至关重要., 然而, 关于该区域对流性和非对流性卷云物理特征的研究十分有限. 本文基于2007–2015年的CALIPSO数据对南海地区的对流性和非对流性卷云进行了研究. 结果表明, 对流性卷云的样本数是非对流性卷云的三倍;对流性卷云表现出较高的冰水含量 (IWC) 并伴随着潮湿的环境条件, 而非对流性卷云的冰水含量较低;此外, 进一步的分析揭示了对流性卷云和非对流性卷云的云量呈现出不同的垂直分布, 对流性卷云的最大云量出现在14 km, 而非对流性卷云则出现在15–16 km;最后, 阐明了驱动两种类型卷云云量的季节性变化机制, 对流性卷云云量的季节性变化主要受自下而上的正比湿异常影响, 而非对流性卷云则受自上而下的负温度异常驱动. © 2024

关键词： CALIPSO Convective cirrus Non-convective cirrus South China sea

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ExpoNAS: Using Exposure-based Candidate Exclusion to Reduce NAS space for Heterogeneous Pipeline of CNNs 29

ExpoNAS: Using Exposure-based Candidate Exclusion to Reduce ...

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29th IEEE International Conference on Parallel and Distributed systems, ICPADS 2023

作者： Duan, Huijuan Wang, Danghui Zhao, Xingting Mei, Kuizhi Wang, Jihe Polytechnical University School of Computer Science Northwestern Xi'an China Northwestern Polytechnical University Engineering Research Center of Embedded System Integration Ministry of Education Xi'an China Xi'An Jiaotong University Institute of Artificial Intelligence and Robotics Xi'an China Northwestern Polytechnical University Natl. Engineering Laboratory for Integrated Aero-Space-Ground-Ocean Big Data Application Technology Xi'an China

ISBN: (纸本)9798350330717

Efficiently deploying neural network models on heterogeneous edge systems faces unique challenges. Two major issues are underutilized pipelines caused by hardware heterogeneity and explosive growth of architecture search space. To address these challenges, we propose ExpoNAS, a framework enabling fast deployment-oriented neural architecture search on heterogeneous platforms. ExpoNAS evaluates model partitioning and deployability before search to meet accuracy and latency constraints. However, repeated partitioning leads to exponential growth in architecture search space. We first observe a strong correlation between operational exposure and accuracy improvement, and then we propose an exposure-based reduction technique that excludes the operations of low exposure. By removing these non-critical operations, the exposure-based pruning successfully reduces architecture search time. Our experiments on popular datasets show that the ExpoNAS pipelined design improves execution efficiency by a factor of 2 compared to traditional batch processing. Without compromising accuracy, ExpoNAS is able to reduce the architecture search time by 47.5% for discovering high-accuracy networks, compared to the SOTA NAS strategies. © 2023 IEEE.

关键词： heterogeneous systems NAS pipeline mapping search space reduction

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Motion compensation for data transmission dantenna angle during satellite attitude maneuvering 7th

Motion compensation for data transmission dantenna angle dur...

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7th International Conference on Signal and Information Processing, Networking and Computers, ICSINC 2020

作者： Jianzhao, Ding Fan, Mo Li, Cheng Tao, Zhang Rina, Wu Jie, Liu Xinyu, Yao Chao, Chen Beijing Institute of Control Engineering Beijing100190 China Beijing Institute of Spacecraft System Engineering Beijing100094 China Science and Technology on Space Intelligent Control Laboratory Beijing100190 China

ISBN: (纸本)9789813341012

With the sharp improvement of the satellite’s ground-to-ground resolution and the development of the whole satellite’s autonomous mission, the contradiction between the observation data downloading and attitude maneuver imaging during satellite transit has become increasingly prominent. This paper proposes a data transfer to the ground during attitude maneuver The antenna motion compensation technology can ensure that the normal data transmission of the ground-based digital transmission antenna can be continued during the satellite attitude mobile imaging, thereby improving the efficiency of satellite data use. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Satellites

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Condor: A Code Discriminator Integrating General Semantics with Code Details

arXiv

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arXiv 2024年

作者： Liang, Qingyuan Zhang, Zhao Liu, Chen Sun, Zeyu Zhang, Wenjie Chen, Yizhou Zhao, Zixiao Luo, Qi Wang, Wentao Jiang, Yanjie Xiong, Yingfei Zhang, Lu MOE SCS Peking University Beijing China National Key Laboratory of Space Integrated Information System Institute of Software Chinese Academy of Sciences Beijing China National University of Singapore Singapore Singapore Southern University of Science and Technology Shenzhen China

LLMs demonstrate significant potential across various software engineering tasks. However, they still face challenges in generating correct code on the first attempt when addressing complex requirements. Introducing a discriminator to select reliable outputs from multiple generated results is an effective way to enhance their reliability and stability. Currently, these discriminators fall into two categories: execution-based discriminators and non-execution-based discriminators. Execution-based discriminators face flexibility challenges due to difficulties in obtaining test cases and security concerns, while non-execution-based discriminators, although more flexible, struggle to capture subtle differences in code details. To maintain flexibility while improving the model’s ability to capture fine-grained code details, this paper proposes Condor. We first design contrastive learning to optimize the code representations of the base model, enabling it to reflect differences in code details. Then, we leverage intermediate data from the code modification process to further enrich the discriminator’s training data, enhancing its ability to discern code details. Experimental results indicate that on the subtle code difference dataset (i.e., CodeNanoFix), Condor significantly outperforms other discriminators in discriminative performance: Condor (1.3B) improves the discriminative F1 score of DeepSeek-Coder (1.3B) from 67% to 73%. In discriminating LLM-generated outputs, Condor (1.3B) and Condor (110M) raise the Pass@1 score of Meta-Llama-3.1-Instruct (70B) on the CodeNanoFix dataset from 52.64% to 62.63% and 59.64%, respectively. Moreover, Condor demonstrates strong generalization capabilities on the MBPP and APPS datasets. For example, Condor (1.3B) improves the Pass@1 of Meta-Llama-3.1-Instruct (70B) on the APPS dataset by 147.05%. © 2024, CC BY.

关键词： Software engineering

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