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High magnetic energy product in isotropic nanocomposite powders with high percent of soft phase towards ultrastrong magnets

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Journal of Materials Science & Technology 2023年第13期144卷 161-167页

作者： Longfei Ma Wei Quan Jinkui Fan yanbai chen Qiang Zheng Baoru Bian Jian Zhang Juan Du Institute of Materials School of Materials Science and EngineeringShanghai UniversityShanghai 200444China Ningbo Institute of Material Technology&Engineering Chinese Academy of SciencesNingbo 315201China

Nanostructure of magnetically hard and soft materials is fascinating for exploring next-generation ul-trastrong permanent magnets with less expensive rare-earth ***,the resulting hard/soft nanocomposites often exhibit a low remanence/energy product due to the challenge in obtaining ideal phase components and appropriate soft phase *** this work,a novel microstructure of multiple phases consisting of 1:5 phase and 1:3 phase as main hard phase,and a high ratio of Fe(Co)(27 wt.%-48 wt.%)as soft phase was obtained in Sm-Co(Fe)/Fe nanocomposite *** grain size of both hard and soft phases below 15 nm was *** optimal energy product for Sm-Co(Fe)/Fe(Co)nanocom-posite is 2.1 times(an increment of 107%)of the corresponding single-hard-phase powders without soft *** reports that the isotropic nanocomposite powders exhibit a record of magnetic energy product larger than 25 MGOe(the highest value is 28.6 MGOe).The high performance and the microstructure achieved in this work for the isotropic powders will shed light on and provide a good premise for syn-thesizing high performance anisotropic bulk nanocomposite magnets.

关键词： Nanocomposite Sm-Co(Fe)/Fe(Co) Microstructure Phase composition Phase fraction Magnetic energy product

突破“孕育性顷刻”——20世纪80年代以来主题性绘画中的群像并置叙事方式

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美术学报 2022年第4期 115-119页

作者：陈彦百西安美术学院

改革开放后,在现代主义美术思潮的影响下,主题性绘画在叙事模式上出现了对“情节性叙事”的出离及“群像并置”的倾向,从而在叙事方式上形成了对传统“孕育性顷刻”的突破。本文通过对新中国以来具有代表性的主题性群像绘画的梳理,透过... 详细信息

改革开放后,在现代主义美术思潮的影响下,主题性绘画在叙事模式上出现了对“情节性叙事”的出离及“群像并置”的倾向,从而在叙事方式上形成了对传统“孕育性顷刻”的突破。本文通过对新中国以来具有代表性的主题性群像绘画的梳理,透过作品探究“群像”的叙事功能及其叙事模式。以图像叙事为理论依据,揭示当代主题性群像绘画叙事模式的转变。

关键词： 20世纪80年代主题性绘画孕育性顷刻群像并置叙事模式

“野草滩”的故事——陈树中乡土绘画中的叙事性

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艺术研究（哈尔滨师范大学艺术学报） 2023年第3期 25-28页

作者：陈彦百西安美术学院

油画家陈树中笔下的乡土世界充满了真实与幻想、深沉与幽默、生机与活力。本文试图将陈树中“野草滩”系列作品看作是一套结构完整的图像叙事作品,探析“原风景”概念对其作品主题与个人情结的影响,并对“野草滩”系列绘画的叙事身份问... 详细信息

油画家陈树中笔下的乡土世界充满了真实与幻想、深沉与幽默、生机与活力。本文试图将陈树中“野草滩”系列作品看作是一套结构完整的图像叙事作品,探析“原风景”概念对其作品主题与个人情结的影响,并对“野草滩”系列绘画的叙事身份问题以及非线性的叙事模式等问题展开讨论,从叙事学理论的范畴对作品的叙事性进行剖析与阐述。

关键词：乡土绘画叙事性原风景叙事视角非线性叙事

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上市公司并购重组现状及对策分析

中国商论 2022年第4期 79-81页

作者：陈彦百徐吉彤湖北工业大学经济与管理学院湖北武汉430070

在供给侧结构性改革的发展背景下,本文通过分析上市公司并购重组的操作方式、业绩承诺的交易流程,发现其中存在监管法规不完善、公司估值高、业绩提成不理想、公司支付波动大等问题,据此提出制定监督管理制度、明确业绩承诺条款、优化... 详细信息

在供给侧结构性改革的发展背景下,本文通过分析上市公司并购重组的操作方式、业绩承诺的交易流程,发现其中存在监管法规不完善、公司估值高、业绩提成不理想、公司支付波动大等问题,据此提出制定监督管理制度、明确业绩承诺条款、优化并购支付工具等防范策略,以降低上市公司并购重组的执行问题、潜在管理风险。

关键词：上市公司并购重组现状优化对策

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浅析对赌协议中的税务风险及其应对

市场周刊 2022年第4期35卷 104-107页

作者：徐吉彤陈彦百湖北工业大学经济与管理学院湖北武汉430000

随着并购活动数量的增长,对赌协议也在我国越来越广泛地运用。而我国针对对赌协议的税收相关法律较少,导致签订对赌协议给企业带来了较大的税务风险。因而,有必要对并购双方所签订对赌协议中涉及的税务风险及应对策略进行相应的阐述。... 详细信息

随着并购活动数量的增长,对赌协议也在我国越来越广泛地运用。而我国针对对赌协议的税收相关法律较少,导致签订对赌协议给企业带来了较大的税务风险。因而,有必要对并购双方所签订对赌协议中涉及的税务风险及应对策略进行相应的阐述。文章将从对赌协议的概述入手,进而提出对赌协议中存在的税务风险问题,并有针对性地提出对赌协议中税务风险的防范应对策略。

关键词：对赌协议税务风险问题策略

Meridional deflection of global eddy propagation derived from tandem altimetry: Mechanism and implication

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Science China Earth Sciences 2024年第3期67卷 811-825页

作者： Ge chen Xiaoyan chen Frontiers Science Center for Deep Ocean Multispheres and Earth System School of Marine TechnologyOcean University of ChinaQindao 266100China Laboratory for Regional Oceanography and Numerical Modeling Laoshan LaboratoryQindao 266237China

A common view on meridional deflection of eddy propagation is poleward for cyclones and equatorward for anticyclones. This widely accepted polarity-sensitive pattern has been increasingly undermined given that it is systematically violated on both zonal and regional scales as recently reported. Here, we approach the problem by exploring these violations in terms of eddy effects of spatiotemporal geostrophy, thermal fading, and flow dragging, yielding the following main conclusions.(1) The polarity-dependent deflection discrepancy is a pseudo feature resulting from a biased fit to the normalized eddy tracks which are spatially asymmetric(though azimuthally symmetric) between the two signs;Instead, the primary pattern of eddy deflection appears to be geographically correlated and polarity independent.(2) Geostrophic adjustment plays a critical role in defining the meridional movement of an eddy. Specifically, a consistent poleward(equatorward) trajectory bending of spatially(temporally) ageostrophic eddies is observed irrespective of their polarity.(3) The mechanism of eddy deflection is also determined by its zonal propagation direction. Westward propagating eddies are substantially affected by thermal fading, while opposite ones by flow dragging. A realistic and comprehensive understanding of eddy deflection mechanisms serves as a significant contribution to the prediction of eddy trajectory, and the protection of ocean environment.

关键词： Mesoscale eddies Eddy propagation Eddy meridional deflection Satellite observation Geostrophic adjustment

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A refined representation method of the particle size distribution curve based on grading entropy

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Particuology 2024年第5期88卷 302-311页

作者： Xing Li Qun chen Zhaozhao Liu cheng Zhou chen Wang chen chen State Key Laboratory of Hydraulics and Mountain River Engineering College of Water Resource and HydropowerSichuan UniversityChengdu610065China

The particle size distribution(PSD)curve is an important expression of the basic properties of the *** characteristic parameters such as median particle size D_(50),effective particle size D_(10),and some combinations of characteristic parameters can only represent some points of the PSD curve,failing to represent all information of the PSD *** this paper,a fraction characteristic parameter F that could reflect the fraction size variation of the PSD curve was introduced based on grading *** a new presentation method of the A-B-F three parameters was proposed for a refined representation of the PSD *** was found that the newly constructed model not only better represents the differences in the width of PSD curves but also has a higher sensitivity than the A-B two-parameter model proposed by Lő*** PSD curves with similar distributions,the new presentation method has a higher degree of discrimination than that of the D_(50)-C_(u)-C_(c) three-parameter or the four-parameter combination G_(c) proposed by ***,the application of this new method in describing the spatial nonuniformity distribution of depositions and predicting the soil hydraulic conductivity was *** research results can provide a reference for the refined representation of PSD curves.

关键词： Grading entropy Particle size distribution curve Refined representation

Track correlation algorithm based on CNN-LSTM for swarm targets

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Journal of Systems Engineering and Electronics 2024年第2期35卷 417-429页

作者： chen Jinyang WANG Xuhua chen Xian Research Institute for National Defense Engineering Academy of Military SciencesLuoyang 471023China Information Engineering University Zhengzhou 450001China School of Computer Science and Technology Xidian UniversityXi’an 710071China

The rapid development of unmanned aerial vehicle(UAV) swarm, a new type of aerial threat target, has brought great pressure to the air defense early warning system. At present, most of the track correlation algorithms only use part of the target location, speed, and other information for *** this paper, the artificial neural network method is used to establish the corresponding intelligent track correlation model and method according to the characteristics of swarm ***, a route correlation method based on convolutional neural networks (CNN) and long short-term memory (LSTM)Neural network is designed. In this model, the CNN is used to extract the formation characteristics of UAV swarm and the spatial position characteristics of single UAV track in the formation,while the LSTM is used to extract the time characteristics of UAV swarm. Experimental results show that compared with the traditional algorithms, the algorithm based on CNN-LSTM neural network can make full use of multiple feature information of the target, and has better robustness and accuracy for swarm targets.

关键词： track correlation correlation accuracy rate swarm target convolutional neural network(CNN) long short-term memory(LSTM)neural network

Two-stage Planning Method for Energy Router Considering Its Optimal Operation in Distribution Networks

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CSEE Journal of Power and Energy Systems 2024年第2期10卷 605-616页

作者： Meifu chen Mingchao Xia Qifang chen School of Electrical Engineering Beijing Jiaotong UniversityBeijing 100044China

An energy router can effectively optimize the network loss and power quality of distribution networks. The optimal configuration of the energy router is relatively complex because issues dynamically influence each other, such as the location of the energy router, optimal number and capacity of its ports, and building new distribution lines for the ports. Presently, there has been very few research studies on the practical problems for the energy router. In this paper, a planning model of an energy router combined with the distribution network is established, which fully exploits the active and reactive power control abilities of the energy router to optimize the operation of the grid. The configuration problem is decoupled into two stages. The upper layer determines the location of the energy router and the parameters of the candidate new distribution lines for the ports. The lower layer calculates the optimal configuration of the energy router by minimizing the total annual cost. Because of the same rated bus voltage in the distribution network, the existing structure of the energy router is changed to be more applicable for the distribution network, and then the power flow model of the energy router is also modified. Due to the nonlinearity of the model, the planning model is converted into a mixed-integer second-order cone model to solve efficiently. In addition, some core factors influencing the optimal scheme of the energy router are also analyzed in this paper. Simulation results show that the optimal scheme of the energy router can significantly improve the economic deployment of the energy router, and optimize the network loss and power quality of the distribution network.

关键词： Capacity allocation distribution network energy router optimal operation