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兼吸式移动床生物质热解炭化装置设计与试验

农业机械学报 2024年第6期55卷 325-331,364页

作者：宋威孟海波陈明松王泽阳葛芸妤武继宁丛宏斌青岛农业大学机电工程学院青岛266109 农业农村部规划设计研究院农业农村部农业废弃物能源化利用重点实验室北京100125

针对目前内热式移动床生物质热解炭化试验研究平台条件不足的问题,开发了一种内加热兼吸式移动床热解炭化装置,模拟连续式热解炭化工艺,设计了供气系统、出炭系统、产物收集系统、气体净化系统、温度监控系统,以稻壳作为原料,开展了上... 详细信息

针对目前内热式移动床生物质热解炭化试验研究平台条件不足的问题,开发了一种内加热兼吸式移动床热解炭化装置,模拟连续式热解炭化工艺,设计了供气系统、出炭系统、产物收集系统、气体净化系统、温度监控系统,以稻壳作为原料,开展了上吸和下吸式热解炭化试验,研究了停留时间和吸气方式对内热式热解炭化产物的影响。结果表明,随着停留时间的增加,上吸和下吸内热式热解炭化变化趋势基本相同,挥发分和固定碳含量均呈下降趋势,灰分含量增加,磷及氮元素含量均下降,氧元素含量上升,氢元素变化趋势不明显,热值分别从20.7MJ/kg和22MJ/kg下降到14.6MJ/kg和15.2MJ/kg;比表面积分别从0.73m^(2)/g和0.78m^(2)/g上升到3.84m^(2)/g和3.95m^(2)/g,生物炭孔隙结构得到了发展。该系统结构合理,运行稳定可靠,密封效果良好,可有效控制进气方式、进气量、保温炭化时间等试验因素。为内加热炭化工艺参数试验研究提供了重要支撑。

关键词：生物质热解炭化上下兼吸

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融合视网膜运动感知的视频目标分割

计算机应用与软件 2024年第8期41卷 240-246,302页

作者：吴婷李椋王刚高晋陈明松王以政南华大学湖南衡阳421001 军事认知与脑科学研究所北京100850 中国科学院自动化研究所北京100190

视频目标分割容易受到目标快速运动、目标遮挡等情形的影响,因此高精度的视频目标分割是极具挑战性的任务。利用光流可以促进物体的分割,但运动边界附近区域的光流往往计算得不准确,从而间接影响了基于光流的视频目标分割性能的提升。... 详细信息

视频目标分割容易受到目标快速运动、目标遮挡等情形的影响,因此高精度的视频目标分割是极具挑战性的任务。利用光流可以促进物体的分割,但运动边界附近区域的光流往往计算得不准确,从而间接影响了基于光流的视频目标分割性能的提升。为突破上述局限,结合生物视网膜大细胞通路模型所提取的运动轮廓信息,来辅助计算运动边界区域的光流,并与传统视频目标分割方法前景-背景分割结合,交替更新光流和分割。所提方法在公开数据集DAVIS-2016、SegTrack-v2、YouTube-Objects上的实验结果表明,该方法相比于基线方法其平均分割精度分别提升了2.2百分点、1.3百分点、1.9百分点。

关键词：视频目标分割视网膜模型图割模型光流算法

基于线上线下混合模式的数学建模课程教学改革

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科教导刊 2024年第22期 145-147页

作者：陈明松何敏园陈晓冠湘南学院数学与信息科学学院湖南郴州423000

数学建模是一门培养学生分析和解决实际问题能力的课程。为了有效地解决学生的学习差异化问题,进一步提升课程教学质量,文章结合数学建模课程的特点以及分析课程教学中存在的问题,提出了将线上线下混合式教学模式应用于数学建模课教学... 详细信息

数学建模是一门培养学生分析和解决实际问题能力的课程。为了有效地解决学生的学习差异化问题,进一步提升课程教学质量,文章结合数学建模课程的特点以及分析课程教学中存在的问题,提出了将线上线下混合式教学模式应用于数学建模课教学的改革方案,帮助学生增强理论联系实际的应用意识,提高学生解决问题的综合能力。

关键词：混合式教学数学建模教学改革

Rethinking Data Center Networks:Machine Learning Enables Network Intelligence

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Journal of Communications and Information Networks 2022年第2期7卷 157-169页

作者： Bo Li Ting Wang Peng Yang mingsong chen Mounir Hamdi Shanghai Key Laboratory of Trustworthy Computing the Engineering Research Center of Soft-ware/Hardware Co-design Technology and Applicationthe Ministry of EducationEast China Normal UniversityShanghai 200062China College of Science and Engineering Hamad Bin Khalifa UniversityDoha 999043Qatar

To support the needs of ever-growing cloudbased services,the number of servers and network devices in data centers is increasing exponentially,which in turn results in high complexities and difficulties in network *** learning(ML)provides an effective way to deal with these challenges by enabling network *** this end,numerous creative ML-based approaches have been put forward in recent ***,the intelligent optimization of data center networks(DCN)still faces enormous *** the best of our knowledge,there is a lack of systematic and original investigations with in-depth analysis on intelligent *** this end,in this paper,we investigate the application of ML to DCN optimization and provide a general overview and in-depth analysis of the recent works,covering flow prediction,flow classification,and resource ***,we also give unique insights into the technology evolution of the fusion of DCN and ML,together with some challenges and future research opportunities.

关键词： data center network intelligent optimiza-tion machine learning network intelligence

Unidirectional plasmonic Bragg reflector based on longitudinally asymmetric nanostructures

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Chinese Physics B 2019年第7期28卷 269-272页

作者： mingsong chen Lulu Pan Yuanfu Lu Guangyuan Li School of Information and Communication Guilin University of Electronic Technology Guilin 541004 China Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen 518055 China

Plasmonic Bragg reflectors are essential components in plasmonic *** we propose a novel type of plasmonic Bragg reflector, which has very high reflectance for the right-side incidence and meanwhile has extremely large absorption for the left-side *** device is composed of longitudinally asymmetric nanostructures in a metal–insulator–metal *** order to efficiently analyze, design, and optimize the reflection and transmission characteristics of the proposed device, we develop a semi-analytic coupled-mode *** show that the reflectance extinction ratio between plasmonic modes incident from the right-side and the left-side reaches 11 *** expect this device with such striking unidirectional reflection performance can be used as insulators in nanoplasmonic circuits.

关键词： plasmonic devices Bragg reflectors unidirectional reflection asymmetric nanostructures

A novel requirement analysis approach for periodic control systems

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Frontiers of Computer Science 2013年第2期7卷 214-235页

作者： Zheng WANG Geguang PU Jiangwen LI Yuxiang chen Yongxin ZHAO mingsong chen Bin GU Mengfei YANG Jifeng HE Shanghai Key Laboratory of Trustworthy Computing Software Engineering Institute East China Normal UniversityChina Shanghai 200241 Beijing Institute of Control Engineering China Beijing 100080 School of Computing National University of SingaporeSingapore Singapore 119077 China Academy of Space Technology China Beijing 100094

Periodic control systems （PCSs） are widely used in real-time embedded system domain. However, traditional manual requirement analysis assumes the expert knowledge, which is laborious and error-prone. This paper proposes a novel requirement analysis approach, which supports the automated validation of the informal requirement specifi- cations. Based on the normalized initial requirement docu- ments, our approach can construct an intermediate SPARDL model with both formal syntax and semantics. To check the overall system behaviors, our approach can transform the SPARDL models into executable code for simulation. The derived prototype simulator from SPARDL models enables the testing-based system behavior validation. Moreover, our approach enables the analysis of the dataflow relations in SPARDL models. By revealing input/output and affecting re- lations, our dataflow analysis techniques can help software engineers to figure out the potential data dependencies be- tween SPARDL modules. This is very useful for the module reuse when a new version of the system is developed. A study of our approach using an industry design demonstrates the practicality and effectiveness of our approach.

关键词： SPARDL simulation dataflow analysis codegeneration

A proof-based method of hybrid systems development using differential invariants

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Frontiers of Computer Science 2018年第5期12卷 1026-1028页

作者： Jie LIU Jing LIU Miaomiao ZHANG Haiying SUN Xiaohong chen Dehui DU mingsong chen Shanghai Key Laboratory of Trustworthy Computing East China Normal University Shanghai 200062 China School of Computer Science and Technology University of South China HengYang 421001 China School of Software Engineering Tongji University Shanghai 201804 China

1 Introduction Event-B is a widely applied and proof-based language for incremental development via refinement [1]. Hybrid systems exhibit hybrid characteristics of discrete control and real-time continuous behaviors. However, Event-B is a discrete modeling language. It does not support the development of hybrid systems. So, the researchers are currently trying to make the extension of Event-B for the refinement development of hybrid systems [2, 3].

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Recrystallization nucleation under close-setδphase in a nickel-based superalloy during annealing

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Journal of Materials Science & Technology 2022年第20期115卷 166-176页

作者： Guanqiang Wang mingsong chen Yongcheng Lin Hongbin Li Yuqiang Jiang Yanyong Ma chengxu Peng Jinliang Cai Quan chen School of Mechanical and Electrical Engineering Central South UniversityChangsha 410083China Light Alloy Research Institute Central South UniversityChangsha 410083China State Key Laboratory of High Performance Complex Manufacturing Changsha 410083China College of metallurgies and energy North China University of Science and TechnologyTangshan 063009China

Annealing is one of the most efficient heat treatment to refine the grain microstructure in metal *** to the annealing,an aging treatment can be implemented to precipitate the second phases for more nucleation sites in deformed mixed grains during subsequent ***,the underlying mechanism behind the second phases and recrystallization has not yet been fully *** a typical deformed nickel(Ni)-based(GH4169)superalloy as an exapmle,this research aims to clairfy the connections between the recrystallization and delta(δ)phase(Ni_(3)Nb) during *** deformed samples were also treated by aging and then *** results show that the microstructure and component ofδphase dominated the recrystallization nucleation in the Ni-based ***,there was the presence of theδphase interval limiting nucleation(PILN)andδphase protecting nucleation(PPN),when a high content of close-set phase was precipitated from the *** PILN determined the primary condition for the recrystallization nucleation that happended at the interval ofδphase larger than the critical nucleation *** peak nucleation occurred in the PPN,where the recrystallization nucleus were free of the penetration by the adjacent grains,before the nucleation incubation time was ***,a new feasible JNtheory was proposed to determine the maximum domain of recrystallization nucleation under close-set precipitated *** the possible nucleation sites were assumed under PPN in the *** such,the original microstructure can be expected to design for the annealing via the aging process.A quantitative evaluation of recrystallization nucleation can also achieved in the Ni-based alloys during aging.

关键词： Nickel-based superalloy δphase Recrystallization Nucleation Metal alloys

A novel annealing method to uniformly refine deformed mixed grain microstructure of a solution-treated Ni-based superalloy

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Science China(Technological Sciences) 2021年第8期64卷 1741-1751页

作者： WANG GuanQiang chen mingsong LIN Yongcheng LI HongBin ZENG WeiDong MA YanYong CAI JinLiang PENG chengXu ZOU FenYang Light Alloy Research Institute Central South UniversityChangsha410083China School of Mechanical and Electrical Engineering Central South UniversityChangsha410083China State Key Laboratory of High Performance Complex Manufacturing Changsha410083China College of metallurgies and energy North China University of Science and TechnologyTangshan063009China

Increasing static recrystallization(SRX)nucleation rate and decreasing grain growth rate are the main ways to obtain uniform and fine grain microstructure by annealing ***,it is contradictory to raise the SRX nucleation rate and reduce grain growth rate during isothermal annealing *** is because the increase of the SRX nucleation rate needs to raise annealing temperature,while the decline of grain growth rate needs to reduce the annealing *** solve the contradiction,a novel method named cooling recrystallization annealing treatment(CRT)is designed and *** the CRT,the relatively high annealing temperature in the primary stage can promote SRX nucleation,and the gradually decreased annealing temperature can reduce the growth rate of SRX ***,an aged treatment is first carried out to precipitate high content of theδphase before the ***δphases not only provide large numbers of sites for SRX nucleation but also limit the grain growth due to the pinning effect,especially in the primary high-temperature *** results show that the novel method can refine deformed mixed grain microstructure well when the suitable cooling rate,start and final recrystallization annealing temperatures are *** deformed mixed grain can be uniformly refined to an average size of 8.26μm with the route of 900℃×12 h+1020℃→970℃×20 min.

关键词： Ni-based superalloy annealing method refinement mechanism grain uniformity microstructure evolution