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Journal of Shanghai Jiaotong university(Science) 2024年第4期29卷 646-655页

作者： DONG Yubo CUI Tao zhou yufan SONG Xun ZHU Yue DONG Peng School of Aeronautics and Astronautics Shanghai Jiao Tong UniversityShanghai200240China Beijing Institute of Electronic System Engineering Beijing100854China

Multi-agent reinforcement learning has recently been applied to solve pursuit ***,it suffers from a large number of time steps per training episode,thus always struggling to converge effectively,resulting in low rewards and an inability for agents to learn *** paper proposes a deep reinforcement learning(DRL)training method that employs an ensemble segmented multi-reward function design approach to address the convergence problem mentioned *** ensemble reward function combines the advantages of two reward functions,which enhances the training effect of agents in long ***,we eliminate the non-monotonic behavior in reward function introduced by the trigonometric functions in the traditional 2D polar coordinates observation *** results demonstrate that this method outperforms the traditional single reward function mechanism in the pursuit scenario by enhancing agents’policy scores of the *** ideas offer a solution to the convergence challenges faced by DRL models in long episode pursuit problems,leading to an improved model training performance.

关键词： multi-agent reinforcement learning deep reinforcement learning(DRL) long episode reward function

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计及动态电价的电动汽车定制化充电策略

电气传动 2024年第7期54卷 32-39页

作者：周宇凡高辉龙羿南京邮电大学自动化学院、人工智能学院江苏南京210023 国网重庆市电力公司重庆400020

为应对电动汽车(EV)充电负荷给电网带来的冲击,平衡电网、充电站和用户三方的利益,提出计及动态电价的电动汽车定制化充电策略。首先根据三方利益需求明确充电站动态电价机制;接着建立以用户充电费用最低和台区负荷波动率最小为目标的E... 详细信息

为应对电动汽车(EV)充电负荷给电网带来的冲击,平衡电网、充电站和用户三方的利益,提出计及动态电价的电动汽车定制化充电策略。首先根据三方利益需求明确充电站动态电价机制;接着建立以用户充电费用最低和台区负荷波动率最小为目标的EV充电过程优化模型;随后在人工蜂群(ABC)算法的基础上,引入自适应正态衰减系数形成自适应ABC算法,并用其对模型进行求解,得到EV定制化的有序充电计划;进一步结合动态电价机制和EV定制化充电方法优化每辆EV的充电过程;最后基于蒙特卡洛方法模拟不同数量EV在不同充电方式下的充电情况。仿真结果表明,所提方法可以大幅提高台区负荷指标、保证站方收益和降低用户充电费用,实现电网、充电站和用户三方利益共赢。

关键词：电动汽车有序充电自适应人工蜂群算法动态电价充电优化

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乌拉地尔与硝普钠治疗高血压脑出血术后早期再出血的临床疗效比较

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当代医学 2024年第15期30卷 67-70页

作者：蔡川行龙新泉周于凡抚州市第一人民医院神经外科江西抚州344000

目的比较乌拉地尔与硝普钠治疗高血压脑出血术后早期再出血的临床疗效。方法选取2019年1月至2022年2月于抚州市第一人民医院诊疗的80例高血压脑出血患者作为研究对象,随机分为乌拉地尔组与硝普钠组,每组40例。乌拉地尔组术后给予乌拉地... 详细信息

目的比较乌拉地尔与硝普钠治疗高血压脑出血术后早期再出血的临床疗效。方法选取2019年1月至2022年2月于抚州市第一人民医院诊疗的80例高血压脑出血患者作为研究对象,随机分为乌拉地尔组与硝普钠组,每组40例。乌拉地尔组术后给予乌拉地尔治疗,硝普钠组术后给予硝普钠治疗,比较两组治疗前后血肿体积、运动功能、神经功能缺损、疾病相关参数及不良反应发生情况。结果两组血肿体积组间、时间比较差异有统计学意义(P<0.05);两组血肿体积交互比较差异无统计学意义。组内比较:两组治疗后各时间点血肿体积均小于前一时间点,差异有统计学意义(P<0.05)。组间比较:治疗前,两组血肿体积比较差异无统计学意义;治疗后1、2、4周,乌拉地尔组血肿体积均小于硝普钠组,差异有统计学意义(P<0.05)。治疗后,两组CSS评分、运动神经评分均高于治疗前,且乌拉地尔组高于硝普钠组,差异有统计学意义(P<0.05)。治疗后,乌拉地尔组血浆黏度、红细胞沉降率、全血低切还原黏度、收缩压和舒张压均低于硝普钠组,差异有统计学意义(P<0.05)。两组不良反应发生率比较差异无统计学意义。结论乌拉地尔治疗高血压脑出血患者早期再出血的疗效显著,可有效减少患者血肿体积,改善神经损伤,有利于运动功能恢复,且安全性高,值得临床推广应用。

关键词：乌拉地尔硝普钠高血压脑出血早期再出血

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湿空气循环分轴燃气轮机的热电联供性能研究

电力与能源 2024年第1期45卷 95-101页

作者：周宇凡葛冰史向彤臧述升上海交通大学机械与动力工程学院动力机械与工程教育部重点试验室上海200240 中国船舶第七〇三研究所上海200093

为研究湿空气燃气轮机(HAT)用于热电联供的热力性能,以试验室建成的湿空气循环分轴燃气轮机为研究对象,利用性能仿真分析方法考察了供热参数对湿空气热电联供系统的影响规律。搭建了湿化循环分轴燃气轮机热电联供性能计算平台,并采用模... 详细信息

为研究湿空气燃气轮机(HAT)用于热电联供的热力性能,以试验室建成的湿空气循环分轴燃气轮机为研究对象,利用性能仿真分析方法考察了供热参数对湿空气热电联供系统的影响规律。搭建了湿化循环分轴燃气轮机热电联供性能计算平台,并采用模块化建模方法建立了HAT循环分轴燃气轮机的热力模型,分析了回热器分流比、供热水流量以及燃料流量对于热电联供系统性能的影响。仿真计算结果表明气轮HAT分轴燃机热电联供时,其热电比可调节范围为0~3.54,与纯供电工况相比发电效率下降了6.72%,但总效率上升了18.4%。在控制策略方面,在进行热电联供时需要同时提高回热器分流比、经济器水量、燃料流量以保证燃气初温、经济器热水温度不变,进而维持热电联供不影响发电量。

关键词：分轴燃气轮机 HAT循环热电联供热力性能

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创业决策模拟运营的实证案例研究

科技创业月刊 2024年第2期37卷 189-195页

作者：郝立伟余焕新周玉凡潘帅胡名娇江西财经大学工商管理学院江西南昌330032 湖南柿竹园有色金属有限责任公司郴州钨制品分公司湖南郴州423000

通过创业决策模拟运营软件平台,设立虚拟公司,进行角色分工,采用既定战略和运营方式,从战略规划、需求分析、品牌设计、营销及市场、人力资源、生产制造、财务管理和沟通协作8个方面进行案例研究,分析战略和策略选择对运营的影响,查找... 详细信息

通过创业决策模拟运营软件平台,设立虚拟公司,进行角色分工,采用既定战略和运营方式,从战略规划、需求分析、品牌设计、营销及市场、人力资源、生产制造、财务管理和沟通协作8个方面进行案例研究,分析战略和策略选择对运营的影响,查找决策的优劣势,分析决策运营中存在的问题,并提出改善对策。

关键词：品牌设计营销人力资源生产制造财务管理

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FATHER OF DIWA THEORY——CHEN GUODA

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有色金属 1991年第1期43卷 79-82,30页

作者： zhou yufan

Professor Chen Guoda,a department member of Academia Sinica,a tu-tor of doctoral and post-doctoral students in the Central South Univer-sity of Technology,has been engaged in geological teaching and researchfor more than 50 *** most important contribution is to found theworldwide praised Diwa theory,which enjoys high prestige in the geo-logical community.

关键词： CHEN GUODA FATHER OF DIWA THEORY Chen

Investigation of oxy-fuel combustion for methane and acid gas in a diffusion flame

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Chinese Journal of Chemical Engineering 2024年第1期65卷 106-116页

作者： Songling Guo Xun Tao Fan zhou Mengyan Yu yufan Wu Yunfei Gao Lu Ding Fuchen Wang Institute of Clean Coal Technology East China University of Science and TechnologyShanghai 200237China

Co-combustion of methane(CH4)and acid gas(AG)is required to sustain the temperature in Claus reaction *** this study,oxy-fuel combustion of methane and acid gas has been experimentally studied in a diffusion *** equivalence ratios(ER=1.0,1.5,2.0)and CH_(4)-addition ratios(CH_(4)/AG=0.3,0.5,0.7)were examined and the flame was interpreted by analyzing the distributions of the temperature and species concentration along central ***_(4)-AG diffusion flame could be classified into three sections namely initial reaction,oxidation and complex reaction *** oxidation of CH_(4)and H_(2)S was noted in the first section wherein H_(2)S was preferred and both were mainly proceeding decomposition and partial ***_(2)was formed at oxidation section together with obvious presence of H2 and ***,H2 and CO were inclined to be sustained under fuel rich condition in the complex reaction *** ER and increasing CH4/AG contributed to higher temperature,H_(2)S and CH_(4)oxidation and CO_(2)*** a growing trend for CH_(4)and AG to convert into H_(2),CO and SO_(2)could be *** this factor enhanced the generation of CS2 and COS in the flame inner core by interactions of CH4 and CO_(2)with sulfur *** was formed through the interactions of CO and CO_(2)with sulfur *** CS_(2)production directly relied on reaction of CH_(4)with sulfur *** concentration of COS was greater than CS_(2)since CS_(2)was probably inhibited due to the presence of H_(2).COS and CS_(2)could be consumed by further oxidation or other complex reactions.

关键词： Acid gas Methane Oxy-fuel combustion Oxidation Chemical analysis Carbon sulfides

DRY-WET-PAINTING ANTIRUST PAINT: PERFORMANCE AND MECHANISM

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材料保护 1992年第8期 15-20页

作者： Chemistry Division, Wuhan University of Water Transportation Engineering, Wuhan, China(430063) Xu Xiaoming, Zhang Zhen and zhou yufan

A dry-wet-painting antirust paint based on epoxy resin is studied for the protection of various steel structural materials in industry. From the measurements the paint is shown to be excelent adhesion, good mechanical performance, and outstanding corrosion resistance with both dry and wet painting. As a part of a systematic study of the mechanism of dry-wet-painting action we have investigated the crosslinking and morphology of dry and wet coating by FT-IR and SEM. The results indicate that water acts only as a catalyst in the crosslink process without altering the mode of erosslinking reaction, and the micrograph of structur of dry-painting coat is similar to that of wet-paintin coat. The mechanism of dry-wet-painting for the paint is proposed

关键词： PERFORMANCE AND MECHANISM DRY-WET-PAINTING ANTIRUST PAINT mode 材料保护

Unsupervised Multi-Expert Learning Model for Underwater Image Enhancement

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IEEE/CAA Journal of Automatica Sinica 2024年第3期11卷 708-722页

作者： Hongmin Liu Qi Zhang yufan Hu Hui Zeng Bin Fan the School of Intelligence Science and Technology and the Institute of Artificial Intelligence University of Science and Technology BeijingBeijing 100083China the School of Automation and Electrical Engineering University of Science and Technology BeijingBeijing 100083China IEEE

Underwater image enhancement aims to restore a clean appearance and thus improves the quality of underwater degraded *** methods feed the whole image directly into the model for ***,they ignored that the R,G and B channels of underwater degraded images present varied degrees of degradation,due to the selective absorption for the *** address this issue,we propose an unsupervised multi-expert learning model by considering the enhancement of each color ***,an unsupervised architecture based on generative adversarial network is employed to alleviate the need for paired underwater *** on this,we design a generator,including a multi-expert encoder,a feature fusion module and a feature fusion-guided decoder,to generate the clear underwater ***,a multi-expert discriminator is proposed to verify the authenticity of the R,G and B channels,*** addition,content perceptual loss and edge loss are introduced into the loss function to further improve the content and details of the enhanced *** experiments on public datasets demonstrate that our method achieves more pleasing results in vision *** metrics(PSNR,SSIM,UIQM and UCIQE) evaluated on our enhanced images have been improved obviously.

关键词： Multi-expert learning underwater image enhancement unsupervised learning

DIWA STRUCTURES IN THE WORLD

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Geotectonica et Metallogenia 1998年第Z2期22卷 180-191页

作者： zhou yufan(Changsha Institute of Geotectonics, Academia Sinica, Changsha 410013, China )

This paper is divided into three parts, The first part introduces diwa theory and its extendedor branch schools. The second part describes the introduction, citation, review and developmentof diwa theory by Chinese and foreign geoscientists. The third part gives a brief account of diwastructures occurring in different parts of the world.

关键词： Diwa theory diwa structure different parts of the world