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Risk Evaluation of Ammonia Leakage based on Modified Probability Calculation Formulas

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Journal of Thermal Science 2023年第2期32卷 854-865页

作者： GE Yingying YANG Zhao HE Hongxia WU Xiaokun chen yubo LV Zijian ZHANG Yong Key Laboratory of Efficient Utilization of Low and Medium Grade Energy MOESchool of Mechanical EngineeringTianjin UniversityTianjin 300072China State Key Laboratory of Air-Conditioning Equipment and System Energy Conservation GREE Electric AppliancesInc.of ZhuhaiGuangdong 519070China

Due to its flammable,explosive,and corrosive characteristics,fire,and explosion accidents caused by ammonia leakage occur from time to *** this work,the concentration distribution of the model was calculated according to the existing formula of probabilistic risk *** the revised formulas,the leakage of the ammonia room was quantitatively analyzed,and different state parameters were analyzed to find out the dangerous leakage points of the ammonia refrigeration *** results of the calculation are that the existence of obstacles in the space will increase the probability of leakage *** the greater the leakage time to the lower flammability limit accounts for the total leakage time,the greater the risk *** leakage in ammonia systems mainly occurs in storage tanks and *** data show that the dynamic mass flow of ammonia leakage decreases with time,and the leakage diameter increases with the increase of leakage *** the same time,the leakage mass increases gradually with the leakage aperture near circular.

关键词： flammable refrigerants leakage risk evaluation of fire probability calculation

Highly active and durable triple conducting composite air electrode for low-temperature protonic ceramic fuel cells

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Nano Research 2023年第7期16卷 9280-9288页

作者： Qi Huang Shanshan Jiang Yujia Wang Jingjing Jiang yubo chen Jiahuan Xu Hao Qiu Chao Su Daifen chen School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212100China Institute of Analysis and Testing Beijing Academy of Science and Technology(Beijing Center for Physical and Chemical Analysis)Beijing 100089China School of Material Science and Engineering Nanyang Technological University50 Nanyang AvenueSingapore 639798Singapore School of Science Jiangsu University of Science and TechnologyZhenjiang 212100China

Protonic ceramic fuel cells(PCFCs)are more suitable for operation at low temperatures due to their smaller activation energy(Ea).Unfortunately,the utilization of PCFC technology at reduced temperatures is limited by the lack of durable and high-activity air electrodes.A lot number of cobalt-based oxides have been developed as air electrodes for PCFCs,due to their high oxygen reduction reaction(ORR)***,cobalt-based oxides usually have more significant thermal expansion coefficients(TECs)and poor thermomechanical compatibility with *** characteristics can lead to cell delamination and ***,we rationally design a novel cobalt-containing composite cathode material with the nominal composition of Sr_(4)Fe_(4)Co_(2)O_(13)+δ(SFC).SFC is composed of tetragonal perovskite phase(Sr_(8)Fe_(8)O_(23)+δ,I4/mmm,81 wt.%)and spinel phase(Co_(3)O_(4),Fd3m,19 wt.%).The SFC composite cathode displays an ultra-high oxygen ionic conductivity(0.053 S·cm^(-1)at 550℃),superior CO_(2)tolerance,and suitable TEC value(17.01×10^(-6)K^(-1)).SFC has both the O_(2)^(-)/e^(-)conduction function,and the triple conducting(H^(+)/O_(2)^(-)/e^(-))capability was achieved by introducing the protonic conduction phase(BaZr_(0.2)Ce_(0.7)Y_(0.1)O_(3-δ),BZCY)to form SFC+BZCY(70 wt.%:30 wt.%).The SFC+BZCY composite electrode exhibits superior ORR activity at a reduced temperature with extremely low area-specific resistance(ASR,0.677Ω·cm^(2)at 550℃),profound peak power density(PPD,535 mW·cm^(-2)and 1.065 V at 550℃),extraordinarily long-term durability(>500 h for symmetrical cell and 350 h for single cell).Moreover,the composite has an ultra-low TEC value(15.96×10^(-6)K^(-1)).This study proves that SFC+BZCY with triple conducting capacity is an excellent cathode for low-temperature PCFCs.

关键词： protonic ceramic fuel cells spinel oxide composition tuning triple-conducting

PBVP of Integrodifferential Equations with Carathéodory Functions

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Acta Mathematica Sinica,English Series 1998年第4期14卷 463-472页

作者： Zhuang Wan chen yubo, Department of Mathematics, Shandong Normal University, Jinan 250014, China Department of Mathematics Shandong Normal University Jinan China

We study the periodic boundary value problems for nonlinear integro-differential equa- tions of Volterra type with Carathéodory functions. For two situations relative to lower and upper solutions α and β:αβ or β α, the existence of solutions and the monotone iterative method for establishing extreme solutions are considered.

关键词： Integrodifferential equations Periodic boundary value problems Carathéodory conditions Lower and upper solutions Sobolev spaces Topological degree

Semi-Supervised Noisy Label Learning for Chinese Clinical Named Entity Recognition

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Data Intelligence 2021年第3期3卷 389-401页

作者： Zhucong Li Zhen Gan Baoli Zhang yubo chen Jing Wan Kang Liu Jun Zhao Shengping Liu National Laboratory of Pattern Recognition Institute of AutomationChinese Academy of SciencesBeijing 100190China School of Artificial Intelligence University of Chinese Academy of SciencesBeijing 100049China Beijing University of Chemical Technology Beijing 100029China UNISOUND AI Technology Co. Ltd.Beijing 100096China

This paper describes our approach for the Chinese clinical named entity recognition(CNER) task organized by the 2020 China Conference on Knowledge Graph and Semantic Computing(CCKS) competition. In this task, we need to identify the entity boundary and category labels of six entities from Chinese electronic medical record(EMR). We constructed a hybrid system composed of a semi-supervised noisy label learning model based on adversarial training and a rule post-processing module. The core idea of the hybrid system is to reduce the impact of data noise by optimizing the model results. Besides, we used post-processing rules to correct three cases of redundant labeling, missing labeling, and wrong labeling in the model prediction results. Our method proposed in this paper achieved strict criteria of 0.9156 and relax criteria of 0.9660 on the final test set, ranking first.

关键词： Named entity recognition Electronic medical record Noisy label learning Semi-supervised Adversarial training

THE　GENERALIZED　SOLUTIONS　OF　PBVP　FOR　INTEGRO-DIFFERENTIAL　EQUATIONS

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Systems Science and Mathematical Sciences 1996年第2期9卷 145-150页

作者： ZHUANG Wan chen yubo(Department of Mathematics, Shandong Normal University, Jinan 250014, China) Department of Mathematics Shandong Normal University Jinan 250014 China su.edu

ＴＨＥＧＥＮＥＲＡＬＩＺＥＤＳＯＬＵＴＩＯＮＳＯＦＰＢＶＰＦＯＲＩＮＴＥＧＲＯ－ＤＩＦＦＥＲＥＮＴＩＡＬＥＱＵＡＴＩＯＮＳＺＨＵＡＮＧＷａｎ；ＣＨＥＮＹｕｂｏ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓ，Ｓｈａｎ... 详细信息

ＴＨＥＧＥＮＥＲＡＬＩＺＥＤＳＯＬＵＴＩＯＮＳＯＦＰＢＶＰＦＯＲＩＮＴＥＧＲＯ－ＤＩＦＦＥＲＥＮＴＩＡＬＥＱＵＡＴＩＯＮＳＺＨＵＡＮＧＷａｎ；ＣＨＥＮＹｕｂｏ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓ，ＳｈａｎｄｏｎｇＮｏｒｍａｌＵｎｉｖｅｒｓ...

关键词： Integro-differential equations periodic boundary value problems generalizedsolutions, monotone iteration imbedded theorem topological degree.

SOME COMPARISON RESULTS FOR NONLINEAR INTEGRO—DIFFERENTIAL EQUATIONS IN A BANACH SPACE

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滨州学院学报 1991年第4期12卷 6-9页

作者： chen yubo Zhuang Wan (Shandong Normal University)

1 Introduction and preliminaries Let E be a real Banach space with the norm‖·‖and E~* denote the dual of *** KE be a cone,that is,a closed convex subset such that λKK for every λ>0 and {K}∩{-K}={0},where 0 is

关键词： preliminaries convex SPACE guaranteed subset lemma interior Zhuang maximal differentiable

THE EXISTENCE OF EXTREMAL SOLUTIONS FOR PBVP OF NONLINEAR INTEGRODIFFERENTIAL SYSTEMS

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滨州学院学报 1991年第4期12卷 10-12页

作者： Zhuang Wan chen yubo (Shandong Normal University)

1 Introduction Consider the following periodic bounded value problem(PBVP for short)of nonlinear integrodifferential system of the form u’=H(t,u,Ku) u(0)=u(2π) (1.1) where H∈C∈[I×R^n×R^n,R^n)。

关键词： monotone maximal iterative uniformly Shandong 北一 Zhuang 镇石

Chondrocyte apoptosis in osteoarthritis in Rabbit Knee joints:An Experimental study

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Chondrocyte apoptosis in osteoarthritis in Rabbit Knee joint...

Antidepressant-like effect of pioglitazone associated with anti-inflammatory response and alternative activation of microglia

2008奥林匹克科学大会

作者： Guo,Ying chen,yubo & Qu,Linhou chengdu Sports University,China

Introduction Based on an osteoarthritic model of the rabbit knee joint,this study attempted to investigate the mechanism of osteoarthritic cartilage degeneration,and explore the relationship between the cartilage degeneration and chondrocyte apoptosis. Methods Twelve rabbits in the experiment were divided in 2 groups(2-week group and 4-week group).Hulth's

关键词： apoptosis Chondrocyte apoptosis in osteoarthritis in Rabbit Knee joints:An Experimental study

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Antidepressant-like effect of pioglitazone associated with a...