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2024 International Conference on New Power System and Power Electronics, NPSPE 2024

作者： Wang, Mingli Su, Biaolong Shao, Siyang Lu, Xiaoxiao Xia, dong Lu, Suyan NARI Technology Co. Ltd. System Application R&D Department Nanjing China

ISBN: (纸本)9798350389869

the analysis of distributed photovoltaic carrying capacity based on load flow calculation is studied. First, the concept of distributed photovoltaic carrying capacity is defined, that is, the maximum value of photovoltaic power generation capacity that can be borne when the distributed power source is connected to the grid and the photovoltaic energy is eliminated, under the premise of ensuring grid security and stability. Next, the constraints affecting the carrying capacity of distributed PV in the power grid are analyzed, including node voltage constraints, grid capacity, thermal stability and power quality. By comparing experimental data between static and dynamic hosting capacity analysis methods, it is found that the dynamic algorithm allows for higher PV generation capacity and exhibits stronger adaptability. The purpose of this paper is to provide important theoretical support and technical methods for grid planning and the rational integration of PV systems by analyzing the constraints on the maximum absorption capacity of PV generation in the distribution network. © 2024 IEEE.

关键词： Load flow optimization

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A Transmit Array Antenna for 5G application

A Transmit Array Antenna for 5G Application

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2024 International Symposium on Antennas and Propagation, ISAP 2024

作者： Kaushal, Shailendra Masuko, Koichiro Guan, Ning Millimeter-wave Device Research Department Electronic Application Technology R&D center Fujikura Ltd. Mutsuzaki Chiba Sakura1440 Japan Electronic Application Technology R&D Center Fujikura Ltd. Mutsuzaki Chiba Sakura1440 Japan

ISBN: (纸本)9798350364774

This paper describes a meta-surface based transmit array (TA) antenna design that operates at n257 band of 5G Nr.A transmit array composed of four substrates with single side printed layers is proposed that provides full 360 deg phase sweep for transmission loss less than 2 *** substrate layers have air between them that helps to get wider range of the phase *** types of transmit array antennas have been fabricated and checked with wide beam horn *** fabricated and simulated models produce similar results of more than 6 dBi broadside gain enhancement beyond 26 *** bandwidth obtained is more than 10 GHz. © 2024 IEEE.

关键词： Horn antennas

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A Line Complex-Based Evolutionary Algorithm for Many-Objective Optimization

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IEEE/CAA Journal of Automatica Sinica 2023年第5期10卷 1150-1167页

作者： Liang Zhang Qi Kang Qi deng Luyuan Xu Qidi Wu the Department of Control Science and Engineering Tongji UniversityShanghai 201804 the Jiangsu Province Support Software Engineering R&D Center for Modern Information Technology Application in Enterprise Suzhou 215104China the Shanghai Institute of Intelligent Science and Technology Tongji UniversityShanghai 200092China

In solving many-objective optimization problems(MaO Ps),existing nondominated sorting-based multi-objective evolutionary algorithms suffer from the fast loss of selection *** candidate solutions become nondominated during the evolutionary process,thus leading to the failure of producing offspring toward Pareto-optimal front with *** we find a more effective way to select nondominated solutions and resolve this issue?To answer this critical question,this work proposes to evolve solutions through line complex rather than solution points in Euclidean ***,Plücker coordinates are used to project solution points to line complex composed of position vectors and momentum *** position vectors of the solution points,momentum vectors are used to extend the comparability of nondominated solutions and enhance selection ***,a new distance function designed for high-dimensional space is proposed to replace Euclidean distance as a more effective distancebased *** on them,a novel many-objective evolutionary algorithm(MaOEA)is proposed by integrating a line complex-based environmental selection strategy into the NSGAⅢ*** proposed algorithm is compared with the state of the art on widely used benchmark problems with up to 15 *** results demonstrate its superior competitiveness in solving MaOPs.

关键词： Environmental selection line complex many-objective optimization problems(MaOPs) Plücker coordinate

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application of BP Neural Network Based on Gray Theory in Back Analysis of Mechanical Parameters of Anhydrous Sand Layer 12

Application of BP Neural Network Based on Gray Theory in Bac...

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12th International Symposium on Project Management, ISPM 2024

作者： Shang, Yanliang Jia, Yahui dang, Hongqian Department of Railway Engineering Shijiazhuang Institute of Railway Technology Shijiazhuang050041 China Application Technology R&D Center of Bridge and Tunnel Intelligent Construction of Hebei Colleges China

ISBN: (纸本)9798331302344

In this paper, the factors affecting the surface subsidence, including the depth of burial, elastic modulus, Poisson's ratio, cohesion and so on, are considered in combination with the monitoring data of the Huai'anqiao-Xisanjie section of Shijiazhuang Metro Line 3. Gray correlation analysis will sort it with the degree of impact. The Lade-duncan constitutive model developed by FLAC3d software was used to select the two molecules of gray correlation analysis. The BP neural network technique and orthogonal test method were used to predict the tunnel Surface subsidence, and the physical parameters of sandstone surrounding rock are inverted. The numerical simulation of the selected tunnel section is carried out by ANSYS and FLAC3d software. The parameters obtained from the inversion are input into the model, and the deformation of the tunnel surrounding rock and the deformation value of the measuring point are obtained. The numerical deformation and the measured displacement are basically anatomist, then meet the accuracy requirements, can be used as a reference for the late construction. © ISPM 2024.

关键词： Poisson ratio

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Study on the Control Effect of Pretreatment Measures on the deformation of Subway Caused by the Excavation of Foundation Pit 10th

Study on the Control Effect of Pretreatment Measures on the ...

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10th International Conference on Civil Engineering, ICCE2023

作者： Jia, Yahui Shang, Yanliang du, Jianhua dang, Hongqian Department of Railway Engineering Shijiazhuang Institute of Railway Technology Shijiazhuang050041 China Application Technology R&D Center of Bridge and Tunnel Intelligent Construction of Hebei Colleges Shijiazhuang China

ISBN: (纸本)9789819743544

At present, there are many control measures for the deformation of subway caused by the excavation of foundation pit. It is worthy of attention that pretreatment measures can effectively reduce the influence of deformation on the subway tunnel under different working conditions. Therefore, the finite element model is established by Midas/GTS to explore the reinforcement effect of two measures of pit bottom reinforcement and isolation pile reinforcement. The results show that: in the excavation of foundation pit, the two schemes have different effects on controlling the deformation of tunnel structure, and the inclination of diameter line is generally smaller. The deformation characteristics of each component structure of the diameter line after the pit bottom reinforcement are similar to those of the unreinforced condition, while the displacement changes of each structure after the isolation pile reinforcement become uniform and reasonable. Isolation pile reinforcement is better than pit bottom reinforcement, especially in reducing the vertical displacement of the structure. The reduction degree of the maximum horizontal displacement after the isolation pile reinforcement is about 24%–31%. Therefore, when selecting the pretreatment method, priority is given to the isolation pile reinforcement method. © The Author(s) 2024.

关键词： reinforcement

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Fully carbonate-electrolyte-based high-energy-density Li–S batteries with solid-phase conversion

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Carbon Energy 2024年第11期6卷 14-26页

作者： Takashi Hakari Yuto Kameoka Kaihei Kishida Shinji Ozaki Chihiro Murata Minako deguchi ryo Harada Tomoki Fujisawa Yusuke Mizuno Heisuke Nishikawa Tomoyuki Tamura Yiqun Wang Hikari Takahara Takashi Aoki Tokuo Inamasu daisuke Okuda Masashi Ishikawa Department of Chemistry and Materials Engineering Faculty of ChemistryMaterials and BioengineeringKansai UniversitySuitaOsakaJ apan R&D Center GS Yuasa International Ltd.Minami-kuKyotoJapan Department of Physical Science and Engineering Nagoya Institute of TechnologyNagoyaAichiJapan Application Laboratory X-ray Product DivisionRigaku CorporationTakatsukiOsakaJapan

Carbonate-electrolyte-based lithium–sulfur(Li–S)batteries with solid-phase conversion offer promising safety and scalability,but their reversible capacities are *** addition,large-format pouch cells are paving the way for large-scale *** study demonstrates the in situ formation of a solid-electrolyte interphase(SEI)as a protective layer using vinylene carbonate(VC),highlighting its industrial adaptability.A high reversible capacity is achieved by the lithiated poly-VC SEI formed inside the cathode particles as a nanoscale ionic conduction path,along with the traditional surface protective ***,the severe dissolution of poly-VC is mitigated by LiF derived from fluorine ethylene carbonate as a co-solvent,enabling high rate performance and a long cycle life.A large 8 Ah pouch cell is successfully developed,which shows a high energy density of 400 Wh kg^(−1) based on the cell *** work demonstrates the high performance of large-scale Li–S batteries with the in situ formation of a protective layer as a scalable technique for future applications.

关键词： lithium-sulfur batteries pouch cells solid-electrolyte interphase

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diagnosis of the Current Situation of Power Supply Units in distribution Networks and Comprehensive Evaluation Method for Planning and Investment

Diagnosis of the Current Situation of Power Supply Units in ...

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2024 International Conference on New Power System and Power Electronics, NPSPE 2024

作者： He, Anhong Li, Pei Zhang, Kun Zhao, Yunlong Wang, Zhonghao Sun, Jinghe State Grid Electric Power Research Institute NARI Group Corporation Nanjing China NARI Technology Co. Ltd. System Application R&D Department Nanjing China

ISBN: (纸本)9798350389869

With the continuous expansion of distribution network construction, there are higher requirements for improving the construction level of distribution networks. It is urgent to address common issues, consolidate the theoretical foundation, and enhance practical applications to support the increasing investment in distribution network projects. This paper takes the power supply unit as the basic unit, clarifies the principles for dividing the supply units, and coordinates the needs of various specialties within the distribution network. From multiple dimensions, a diagnostic index system is formulated, resulting in an effective evaluation model for analyzing distribution networks. By setting target values for various indicators of different levels of power supply units, the analysis focuses on the current grid structure, operational status, and equipment health of the distribution network. It identifies shortcomings by comparing them with target values, improving the evaluation effect of the standard grid structure of the distribution network. Targeted improvement measures are proposed to guide planning and investment directions, promoting steady improvement in distribution network construction quality and supply reliability, and enhancing the precision and scientific nature of distribution network project planning and investment. © 2024 IEEE.

关键词： Power distribution planning

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distributed Aperture Coherent Synthesis Method based on Two-stage Compensation 2

Distributed Aperture Coherent Synthesis Method based on Two-...

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2nd IEEE International Conference on Signal, Information and data Processing, ICSIdP 2024

作者： Liu, Zhongwei Zhou, dongming Xiang, rongrong Chen, Jie Wu, Tianhang ding, Tianyu Liu, Xiaochuan Gao, Hongwei Beihang University School of Electronic and Information Engineering Beijing China School of Information and Electronics Beijing Institute of Technology Radar Research Lab Beijing China Beijing Institute of Computer Technology and Application Department of Data Technology and Application Beijing China Beijing Institute of Radio Measurement Radar R&d Center Beijing China

ISBN: (纸本)9798331515669

To solve the problem that it is difficult to accurately estimate the coherent parameters of distributed aperture radar under the condition of low signal-to-noise ratio, a distributed coherent synthesis method based on two-stage compensation is proposed in this paper. This method utilizes prior information such as system layout, beam pointing, and inertial navigation station location to perform coarse alignment of echoes at the first stage in time, and then uses cross-correlation method to estimate coherent parameters of delay and phase within a small range, and perform precise compensation of time and phase at the second stage, so as to realize the coherent synthesis of multiple radar echoes. Experimental results show that the proposed method can effectively realize distributed coherent synthesis processing under low signal-to-noise ratio. © 2024 IEEE.

关键词： Signal to noise ratio

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Efficient detection of Generative Chinese Statements Using Feature Compression Methods

Efficient Detection of Generative Chinese Statements Using F...

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Mobile Internet, Cloud Computing and Information security (MICCIS), International Conference on

作者： Yiang Gao Tianrui Huang Nishui Cai dawei Yang R&D Department of Security Application Technology China Telecom Research Institute Shanghai China AIEN Institute Shanghai Ocean University Shanghai China

ISBN: (数字)9798350389906

ISBN: (纸本)9798350389913

With the explosion of big models, compliance detection of generative utterances becomes increasingly important. Currently, the detection of Chinese corpus faces the problems of 1. a small number of effective datasets and 2. poor learning effect of Chinese corpus. In this paper, we explore a chinese statement learning approach based on a small amount of data based on the COLd dataset, which proves that the small sample data can also bring a good learning effect to the model under low-dimensional features.

关键词： Cloud computing Information security Feature extraction Explosions data models Faces

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Behavior Analysis of User Interaction on Online Short Video Platform

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Journal of Computing and Information technology 2022年第1期30卷 51-65页

作者： Sun, Guang-Ming Wang, Shuo Zhang, Yun-Kai Liu, Yang Gao, Jin Xie, Qin Department of Electrical and Information Engineering Hebei Jiaotong Vocational and Technical College Shijiazhuang China Road Traffic Perception and Intelligent Application Technology R&D Center of Universities in Hebei Province Shijiazhuang China

Online short video platform (OSVP) can disseminate information in an intuitive and three-dimensional (3d) way, and achieve commercial value in a mobile, so-cialized, life-oriented manner. To fully understand the information dissemination mode of short videos, it is of practical significance to explore user behavior and their interactive relationship. Therefore, this paper carries out a behavior analysis of user interaction on OSVP. Firstly, an OSVP user interaction model was established based on three aspects: activity, attention, and interactivity. Next, user preference for short videos was examined through cluster analysis and evalua-tion. Finally, the authors summarized the behavior fea-tures of OSVP user interaction and investigated user interaction to decide which videos should be pushed to users. The average utility and average cost of user interaction behavior were compared, indicators of degree centrality were summarized, and the validity of the proposed algorithm was verified by experimental results. © 2022, University of Zagreb Faculty of Electrical Engineering and Computing. All rights reserved.

关键词： Information dissemination

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