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Effect of flue gas recirculation technology on soot and NO formation in the biomass pyrolysis-combustion system

Science China(Technological Sciences) 2023年第4期66卷 945-955页

作者： yang yu ZHENG Shu HE yuZhen LIU Hao LU Qiang National Engineering Research Center of New Energy Power Generation North China Electric Power UniversityBeijing 102206China

Pyrolysis of biomass followed by combustion of pyrolytic vapors to replace fossil fuels is an economic low-carbon solution.However,the polycyclic aromatic hydrocarbons and N-containing species in biomass pyrolysis vapors result in the soot and NO emissions.The flue gas recirculation(FGR)technology,having the potential to reduce the soot and NO emissions,was introduced to the biomass pyrolysis-combustion system.In addition,it was numerically studied by simulating the biomass pyrolysis vapors based co-flow diffusion flames with CO_(2)addition.Both the experimental and simulated results showed that the FGR had significant suppression effects on the soot formation.When the FGR ratio(i.e.,CO_(2)addition ratio)increased from 0%to 15%,the experimental and simulated soot volume fraction respectively decreased by 32%and 21%,which verified the models used in this study.The decrease in OH concentration caused by the CO_(2)addition was responsible for the decrease in the decomposition rate of A2(A2+OH=A2–+H_(2)O).Hence,more benzo(ghi)fluoranthene(BGHIF)was generated through A1C_(2)H–+A2→BGHIF+H_(2)+H,leading to the increase in inception rate.The decrease in benzo(a)pyrene(BAPYR)concentration was the major factor in the decrease in soot condensation rate.Moreover,the decrease in the C_(2)H_(2) and OH concentrations was responsible for the decrease in the HACA surface growth rate.Furthermore,the simulated results showed that the NO concentration decreased by 0.4%when the content of CO_(2)was increased by 1 vol.%.The decrease in OH concentration suppressed the NO formation via decreasing reaction rates of N+OH=NO+H and HNO+OH=NO+H_(2)O and enhanced the NO consumption via increasing reaction rate of HO_(2)+NO=NO_(2)+OH.

关键词： biomass pyrolysis vapors biomass pyrolysis-combustion system flue gas recirculation NO emission soot reduction

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CDP-GAN:Near-Infrared and Visible Image Fusion Via Color Distribution Preserved GAN

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IEEE/CAA Journal of Automatica Sinica 2022年第9期9卷 1698-1701页

作者： Jun Chen Kangle Wu yang yu Linbo Luo the School of Automation Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex SystemsEngineering Research Center of Intelligent Technology for Geo-ExplorationMinistry of EducationChina University of GeosciencesWuhan 430074China the Shanghai Institute of Technical Physics Key Laboratory of Infrared System Detecting and Imaging TechnologyChinese Academy of SciencesShanghai 200083China the School of Mechanical Engineering and Electronic Information China University of GeosciencesWuhan 430074China

Dear Editor,This letter is concerned with dealing with the great discrepancy between near-infrared(NIR)and visible(VS)image fusion via color distribution preserved generative adversarial network(CDP-GAN).Different from the global discriminator in prior GAN,conflict of preserving NIR details and VS color is resolved by introducing an attention guidance mechanism into the discriminator.Moreover。

关键词： details dealing preserving

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Enterochromaffin Cell:Friend or Foe for Human Health?

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Neuroscience Bulletin 2023年第11期39卷 1732-1734页

作者： yang yu Yong-Chang Li Fu-Chao Zhang Guang-Yin Xu Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience Soochow UniversitySuzhou 215123China

Enterochromaffin(EC)cells are a type of enteroendocrine cells that reside in the epithelial lining of the gastrointestinal tract.They function as sensory transducers of stimuli present in the intestinal lumen,as afferent nerves do not protrude into the lumen,but have been shown to act as a friend or a foe depending on various conditions.It has been well-described that EC cells play their role by releasing 5-HT to activate neighboring afferent nerves in a paracrine fashion,while emerging evidence suggests the existence of synaptic-like connections between enteroendocrine cells and adjacent afferent nerves based on in vitro co-culture and in vivo viral tracing studies.

关键词： nerves releasing Human

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Autonomous Overtaking for Intelligent Vehicles Considering Social Preference Based on Hierarchical Reinforcement Learning

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Automotive Innovation 2022年第2期5卷 195-208页

作者： Hongliang Lu Chao Lu yang yu Guangming Xiong Jianwei Gong Beijing Institute of Technology BeijingChina

As intelligent vehicles usually have complex overtaking process,a safe and efficient automated overtaking system(AOS)is vital to avoid accidents caused by wrong operation of drivers.Existing AOSs rarely consider longitudinal reactions of the overtaken vehicle(OV)during overtaking.This paper proposed a novel AOS based on hierarchical reinforcement learning,where the longitudinal reaction is given by a data-driven social preference estimation.This AOS incorporates two modules that can function in different overtaking phases.The first module based on semi-Markov decision process and motion primitives is built for motion planning and control.The second module based on Markov decision process is designed to enable vehicles to make proper decisions according to the social preference of OV.Based on realistic overtaking data,the proposed AOS and its modules are verified experimentally.The results of the tests show that the proposed AOS can realize safe and effective overtaking in scenes built by realistic data,and has the ability to flexibly adjust lateral driving behavior and lane changing position when the OVs have different social preferences.

关键词： Automated overtaking system Semi-Markov decision process Hierarchical reinforcement learning Social preference

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Lower risk of male infanticide in multilevel primate societies

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Zoological Research 2023年第2期44卷 370-373页

作者： Yi-Lin Xiang yang yu Hui-Juan Pan Ming Li School of Arts and Design Beijing Forestry UniversityBeijing 100083China School of Ecology and Nature Conservation Beijing Forestry UniversityBeijing 100083China CAS Key Lab of Animal Ecology and Conservation Biology Institute of ZoologyChinese Academy of SciencesBeijing 100101China

DEAR EDITOR,Male infanticide is considered a severe manifestation of sexual conflict in non-human primates during male takeover or male dominance changes. Males engaging in infanticide may obtain fitness benefits, but at the cost of female reproductive outcomes. Consequently, females have developed various anti-infanticide counterstrategies, such as coalitions, dispersal.

关键词： dispersal Lower changes.

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Flocculated unclassified tailings settling efficiency improvement by particle collision optimization in the feedwell

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International Journal of Minerals,Metallurgy and Materials 2022年第12期29卷 2126-2135页

作者： Huazhe Jiao Weilin Chen Aixiang Wu yang yu Zhuen Ruan Rick Honaker Xinming Chen Jianxin yu School of Civil Engineering Henan Polytechnic UniversityJiaozuo 454003China School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China School of Surveying and Land Information Engineering Henan Polytechnic UniversityJiaozuo 454000China China Geological Environmental Monitoring Institute Beijing 100081China State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization Jiaozuo 454150China Mining Engineering Faculty University of KentuckyLexington 40506America

Efficient thickening of tailings is a prerequisite for the metal mine tailings backfill and surface disposal operation.The effective collision of ultrafine tailings particles in suspension with flocculant molecules is essential for flocs aggregates formation and settling.Unreasonable feeding speed and flocculant adding method will lead to the failure of effective dispersion of flocculant and high particle content in thickener overflow.In this work,the effect of turbulence intensity and flocculant adding method on floc size,strength,and movement characteristics are analysed.Aiming to solve the turbidity increased,a pilot-scale continuous thickening test was carried out.Taking a single particle and multiple flocs of full tailings as the research object,the particle iterative settlement model of flocs was established.The influence of turbulence intensity on collision effect is studied by tracking and simulating particle trajectory.The results show that in the process of single particle settlement,chaos appears in the iterative process owing to particle adhesion which caused by micro action.When the turbulence intensity is 25.99%,the maximum particle size of tailings floc is 6.21 mm and the maximum sedimentation rate is 5.284 cm·s^(−1).The tailings floc presents a multi-scale structure of particle-force chain system when hindered settling,and the interweaving of strong and weak force chains constitutes the topological structure of particles.The results are applied to a thicker in plant,the flocculant addition mode and feed rate are optimized,and the flocs settling speed and overflow clarity are improved.

关键词： unclassified tailings flocculation settling rate thickener feedwell turbulence intensity flocs micro-structure

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Monitoring and identifying pendant droplets in microbottle resonators

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Photonics Research 2022年第3期10卷 662-667页

作者： Zijie Wang Xiaobei Zhang Qi Zhang Yiqi Chen Yong yang yang yu yang Wang Yanhua Dong Yi Huang Tingyun Wang Key Laboratory of Specialty Fiber Optics and Optical Access Networks Joint International Research Laboratory of Specialty Fiber Optics and Advanced CommunicationShanghai Institute for Advanced Communication and Data ScienceShanghai UniversityShanghai 200444China

Optofluidic resonators are capable of characterizing various fluidic media.Here,we propose an optofluidic microbottle resonator(OFMBR)that is applied to generate pendant droplets,whose maximum mass is related to the liquid surface tension.Mass and type of droplets forming along the OFMBR stem can be monitored in real time by spectrum variation.As a pendant droplet grows,increased droplet gravity introduces a decreased coupling gap and compressive force between the tapered fiber and OFMBR,leading to a resonance wavelength shift.The operation mechanism of the proposed sensors is validated by theoretical simulation and experimental results.From the experimental spectra,a liquid mass sensor with maximum sensitivity of−3.34pm/mg is obtained,and distilled water and alcohol can be identified.This scheme provides a new thread for droplet generation as well as fluidic properties characterization.

关键词： mechanism coupling alcohol

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CircRNA DICAR as a novel endogenous regulator for diabetic cardiomyopathy and diabetic pyroptosis of cardiomyocytes

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Signal Transduction and Targeted Therapy 2023年第4期8卷 1889-1900页

作者： Qiong yuan yunwei Sun Fan yang Dan Yan Meihua Shen Zhigang Jin Lin Zhan Guangqi Liu Ling yang Qianyi Zhou Zhijun yu Xiangyu Zhou yang yu Yong Xu Qingming Wu Jianfang Luo Xiamin Hu Chunxiang Zhang Department of Cardiology the Affiliated Hospital of Southwest Medical University and Key Laboratory of Medical ElectrophysiologyMinistry of EducationInstitute of Cardiovascular Research and Institute of Metabolic DiseasesSouthwest Medical UniversityLuzhou 646000China College of Medicine Wuhan University of Science and TechnologyWuhan 430065China Department of Emergency and Critical Care Medicine Guangdong Provincial People’s HospitalGuangdong Academy of Medical SciencesGuangzhou 510080China China Resource&WISCO General Hospital Wuhan University of Science and TechnologyWuhan 430065China Department of Cardiology Guangdong Cardiovascular InstituteGuangdong Provincial Key Laboratory of Coronary Heart Disease PreventionGuangdong General HospitalGuangzhouChina College of Pharmacy Shanghai University of Medicine and Health SciencesShanghai 210000China

In this study,we identified that a conserved circular RNA(circRNA)DICAR,which was downregulated in diabetic mouse hearts.DICAR had an inhibitory effect on diabetic cardiomyopathy(DCM),as the spontaneous cardiac dysfunction,cardiac cell hypertrophy,and cardiac fibrosis occurred in DICAR deficiency(DICAR+/−)mice,whereas the DCM was alleviated in DICARoverexpressed DICARTg mice.At the cellular level,we found that overexpression of DICAR inhibited,but knockdown of DICAR enhanced the diabetic cardiomyocyte pyroptosis.At the molecular level,we identified that DICAR-VCP-Med12 degradation could be the underlying molecular mechanism in DICAR-mediated effects.The synthesized DICAR junction part(DICAR-JP)exhibited a similar effect to the entire DICAR.In addition,the expression of DICAR in circulating blood cells and plasma from diabetic patients was lower than that from health controls,which was consistent with the decreased DICAR expression in diabetic hearts.DICAR and the synthesized DICAR-JP may be drug candidates for DCM.

关键词： diabetic endogenous cardiomyopathy

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NνDEx-100 conceptual design report

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Nuclear Science and Techniques 2024年第1期35卷 18-33页

作者： Xi-Guang Cao Yan-Long Chang Kai Chen Emilio Ciuffoli Li-Min Duan Dong-Liang Fang Chao-Song Gao Surja K.Ghorui Peng-Chong Hu Qiang Hu Si-yuan Huang Ze-yu Huang Lei Lang yu-Lan Li Zhi-Jie Li Tian-yu Liang Jun Liu Chen-Gui Lu Fa-Tai Mai yuan Mei Hao Qiu Xiang-Ming Sun Xiao-Xing Tang Hu-Lin Wang Qian-Ming Wang Le Xiao Mu-yun Xiao Jian-yu Xin Nu Xu Peng yang Yi-Chen yang Zhen yang Zong-yang yu Dong-Liang Zhang Jun-Wei Zhang Cheng-Xin Zhao Dou Zhu NνDEx-100 collaboration Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China Lanzhou University Lanzhou 730000China Central China Normal University Wuhan 430079China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Lawrence Berkeley National Laboratory BerkeleyCA 94720USA North China University of Water Resources and Electric Power Zhengzhou 450045China 不详

Observing nuclear neutrinoless double beta (0vββ) decay would be a revolutionary result in particle physics.Observing such a decay would prove that the neutrinos are their own antiparticles,help to study the absolute mass of neutrinos,explore the origin of their mass,and may explain the matter-antimatter asymmetry in our universe by lepton number violation.We propose developing a time projection chamber (TPC) using high-pressure ^(82)SeF_(6) gas and Topmetal silicon sensors for readout in the China Jinping Underground Laboratory (CJPL) to search for neutrinoless double beta decay of82Se,called the NvDEx experiment.Besides being located at CJPL with the world’s thickest rock shielding,NvDEx combines the advantages of the high Qββ(2.996 MeV) of82Se and the TPC’s ability to distinguish signal and background events using their different topological characteristics.This makes NvDEx unique,with great potential for low-background and high-sensitivity 0 vββsearches.NvDEx-100,a NvDEx experiment phase with 100 kg of SeF_(6)gas,is being built,with plans to complete installation at CJPL by 2025.This report introduces 0 vββ physics,the NvDEx concept and its advantages,and the schematic design of NvDEx-100,its subsystems,and background and sensitivity estimation.

关键词： Neutrinoless double beta decay Time projection chamber ^(82)SeF_(6) China Jinping Underground Laboratory

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圆弧形蜂窝夹芯板在低速冲击下的动力响应研究

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振动与冲击 2024年第5期43卷 214-222,238页

作者：余阳付涛昆明理工大学机电工程学院昆明650500

为了研究具有负泊松比特性的圆弧形蜂窝夹芯板的动力响应,基于哈密顿原理和一阶剪切变形理论推导了圆弧形蜂窝夹芯板的运动方程,同时建立两自由度的质量-弹簧模型来获得蜂窝夹芯板与冲击器之间的接触力,利用Navier法和Duhamel积分对圆... 详细信息

为了研究具有负泊松比特性的圆弧形蜂窝夹芯板的动力响应,基于哈密顿原理和一阶剪切变形理论推导了圆弧形蜂窝夹芯板的运动方程,同时建立两自由度的质量-弹簧模型来获得蜂窝夹芯板与冲击器之间的接触力,利用Navier法和Duhamel积分对圆弧形夹芯板的运动方程解析求解。在理论模型有效性验证方面,低速冲击下蜂窝夹芯板中心最大横向位移的理论模型计算结果与ABAQUS有限元仿真结果的最大相对误差为4.9%,同时求得理论模型与已发表文献计算出的接触力最大相对误差为8%,验证了理论模型的有效性。通过理论模型研究了蜂窝胞元参数变化对蜂窝夹芯板动力响应的影响,研究结果表明:随着球形冲击器的冲击速度递增,圆弧形蜂窝夹芯板中心最大横向位移也呈现出递增的规律;圆弧形蜂窝夹芯板的抗冲击特性随着蜂窝胞元半径或角度的增大而减小,当蜂窝胞元半径从5 mm增加至7 mm时,蜂窝夹芯板的抗冲击特性减少40.28%;当蜂窝胞元角度从30°增加至60°时,蜂窝夹芯板的抗冲击特性减少83.64%;蜂窝夹芯板的抗冲击特性随着蜂窝胞元壁厚的增大而增大,当蜂窝胞元壁厚从1 mm增加至3 mm时,蜂窝夹芯板的抗冲击特性提升59.51%。通过减小胞元角度和半径,增加胞元壁厚可以提升圆弧形蜂窝夹芯板的抗冲击特性。

关键词：低速冲击蜂窝夹芯板一阶剪切变形理论质量-弹簧模型 ABAQUS有限元仿真

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