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Effect of supports on the redox performance of pyrite cinder in chemical looping combustion

Chinese Journal of Chemical Engineering 2021年第9期34卷 168-174页

作者： Zhong Ma Chuan Yuan Shuai Zhang Yonggang Lu junhui Xiong School of Energy&Power Engineering Jiangsu UniversityZhenjiang 212013China State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering Ningxia UniversityYinchuan 750021China Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing 210096China

Chemical looping combustion(CLC)is a clean and efficient flame-free combustion technology,which combust the fuels by lattice oxygen from a solid oxygen carrier with inherent CO_(2)capture.The development of oxygen carriers with low cost and high redox performance is crucial to the whole efficiency of CLC process.As the solid by-product from the sulfuric acid production,pyrite cinder presented excellent redox performance as an oxygen carrier in CLC process.The main components in pyrite cinder are Fe_(2)O_(3),CaSO_(4),Al_(2)O_(3)and SiO_(2)in which Fe_(2)O_(3)is the active component to provide lattice oxygen.In order to systematic investigate the functions of supports(CaSO_4,Al_(2)O_(3)and SiO_(2))in pyrite cinder,three oxygen carriers(Fe_(2)O_(3)-CaSO_(4),Fe_(2)O_(3)-Al_(2)O_(3)and Fe_(2)O_(3)-SiO_(2))were prepared and evaluated in this study.The results showed that Fe_(2)O_(3)-CaSO_(4) displayed high redox activity and cycling stability in the multiple redox cycles.However,both Fe_(2)O_(3)-Al_(2)O_(3)and Fe_(2)O_(3)-SiO_(2)experienced serious deactivation during redox reactions.It indicated that the inert Fe-Si solid solution(Fe_(2)SiO_(4))was formed in the spent Fe_(2)O_(3)-SiO_(2)sample,which decreased the oxygen carrying capacity of this sample.The XPS results showed that the oxygen species on the surface of Fe_(2)O_(3)-CaSO_(4) could be fully recovered after the 20 redox cycles.It can be concluded that CaSO_(4) is the key to the high redox activity and cycling stability of pyrite cinder.

关键词： Chemical looping Pyrite cinder Supports Fixed-bed Redox performance Waste treatment

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Jet Formation Mechanism of the Gamma-Ray-emitting Narrow-line Seyfert 1 Galaxies

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Research in Astronomy and Astrophysics 2022年第9期22卷 72-76页

作者： Yongyun Chen Qiusheng Gu junhui Fan Xiaoling Yu Dingrong xiong Nan Ding Xiaotong Guo Xue Ge College of Physics and Electronic Engineering Qujing Normal UniversityQujing 655011China Collaborative Innovation Center of Modern Astronomy and Space Exploration Nanjing 210093China School of Astronomy and Space Science Nanjing UniversityNanjing 210093China Center for Astrophysics Guangzhou UniversityGuangzhou510006China Yunnan Observatories Chinese Academy of SciencesKunming 65001lChina School of Physical Science and Technology Kunming UniversityKunming 650214China Anqing Normal University Anqing.246133China School of Physics and Electronic Engineering Jiangsu Second Normal UniversityNanjing 211200China

We use a large sample of gamma-ray narrow-line Seyfert 1 galaxies(γ-NLS1 s) to study the jet formation mechanisms. We find that the jet power of γ-NLS1 s is lower than the maximum jet power of the Blandford–Payne(BP) mechanism. At the same time, we find that there is a significant correlation between jet power and accretion disk luminosity. Moreover, the contribution rates of the accretion to the jet power are larger than that of black hole mass to jet power. These results further suggest that the jet of γ NLS1 s is mainly produced by the BP mechanism.

关键词： galaxies:active galaxies:jets galaxies:Seyfert

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Compressive Behaviour and Failure Mechanisms of GFRP Composite at High Strain Rates

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Journal of Beijing Institute of Technology 2019年第1期28卷 184-190页

作者： Dejun Yin Jian Zheng Chao xiong junhui Yin Huiyong Deng Xiaobo Su Department of Artillery Engineering Army Engineering University Shijiazhuang Division of PLAA Infantry College

Experimental investigations into the compressive behavior of glass fiber reinforced polymer(GFRP)composite at high strain rates were carried out using a split Hopkinson pressure bar(SHPB)setup.The GFRP laminates were made from E-glass fibers and epoxy resins by vacuum assisted compression molding machine.The results of the compressive tests indicated that the mechanical behavior of the GFRP composite depends highly on the strain rate.The compressive peak stress,toughness and Young's modulus of the GFRP composite increased with the increase of strain rate,while the strain level at the initial stages of damage was shortened with the increase of strain rate.In addition,the dynamic deformation behavior and failure process of the specimens were observed directly by using a high-speed camera.Following the experiments,the fracture morphologies and damage modes were examined by scanning electron microscopy(SEM)to explore the possible failure mechanisms of the specimens.The results showed that multiple failure mechanisms appeared,such as matrix crack,fiber-matrix debonding,fiber failure and shear fracture.

关键词： glass fiber reinforced polymer(GFRP)composite split Hopkinson pressure bar(SHPB) compressive behavior failure mechanism high-speed camera

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极寒地区预制梁新型蒸汽养生棚设计与施工

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市政技术 2022年第3期40卷 68-73页

作者：熊军辉北京城建道桥建设集团有限公司北京100022

以世界第二大冷都——哈萨克斯坦共和国鲁尔苏丹市的新交通系统轻轨1期工程1号梁场的预制梁养护为研究对象,针对其昼夜温差达30℃、气候严寒、大风天气多的环境特点,通过对混凝土养生的工法、保温材料和保温棚结构设计的对比研究,设计... 详细信息

以世界第二大冷都——哈萨克斯坦共和国鲁尔苏丹市的新交通系统轻轨1期工程1号梁场的预制梁养护为研究对象,针对其昼夜温差达30℃、气候严寒、大风天气多的环境特点,通过对混凝土养生的工法、保温材料和保温棚结构设计的对比研究,设计了一种新型模块化卷帘式轻型蒸汽养生棚。该养生棚具有存储场地小、安全可靠、环保、保温防风效果好等优点,能满足现有预制梁和类似预制构件的养护要求。其构造简单、安拆方便、重量轻、制造和维护费用低,可供类似工程提供参考。

关键词：极寒地区预制梁模块化卷帘式轻型养生棚

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Using citizen science data to improve regional bird species list:A case study in Shaanxi,China

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Avian Research 2022年第3期13卷 341-346页

作者： Ying Ding Lichuan xiong Fandi Ji junhui Lu Xiaojia Zhu Huateng Huang College of Life Sciences Shaanxi Normal UniversityXi'an710119China

An accurate and updated regional bird species checklist is the foundation for biodiversity research and conservation.However,with ongoing climate and landscape changes,tracking the distributions of bird species is challenging,and expert-curated species lists are often limited regarding survey area and timeliness.Birdwatching in China is becoming increasingly popular,and observations recorded by citizen birders are quickly increasing as well.Assessing the value of these data for improving regional species lists and studying bird distribution needs a detailed and quantitative comparison of citizen science data and expert-curated data.We collected observation reports from the China Bird Report Center,the largest online open platform for sharing bird sightings in China.We focused on reports from 2016 to 2019 in Shaanxi Province.For expert-curated species lists,we used three sources:the latest bird field guide published by local ornithologists,the province list from Avibase,and a list generated from overlaying distribution range from BirdLife International with the outline of Shaanxi Province.In addition,we also compared the bird sighting coordinates with the species distribution maps from BirdLife International.Surprisingly,species checklists from different sources have considerable discrepancies,even among lists based on expert knowledge.Including birdwatching data,there are 616 bird species in total,but less than half of the species(294)appear in all checklists,and 17.2%of species are unique to one list.One hundred sixty-three species lack birdwatching records,but birdwatching identified 39 species new to the province.One hundred thirty-six bird species have sighting locations outside the distribution ranges from BirdLife International,suggesting that updates might be needed.The data also showed a clear trend of bird species shifting to higher latitudes than their traditional distributions.While being inadequate for generating a regional species checklist on its own,birdwatching data in China can be a valuable sour

关键词： Bird distribution Birdwatching Citizen science Expert knowledge Species checklist

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浅谈钢筋混凝土坡屋面渗漏原因和防水技术

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房地产世界 2022年第12期 152-154页

作者：熊军辉兰州新区农投建设工程有限公司

本文分析了钢筋混凝土坡屋面渗漏的原因,并且从多个角度出发,提出了针对性的解决措施,以期提高钢筋混凝土坡屋面结构的稳定性与可靠性,减小渗漏问题的发生概率,避免基层变形。从建筑质量的角度来看,加强钢筋混凝土坡屋面防水技术应用,... 详细信息

本文分析了钢筋混凝土坡屋面渗漏的原因,并且从多个角度出发,提出了针对性的解决措施,以期提高钢筋混凝土坡屋面结构的稳定性与可靠性,减小渗漏问题的发生概率,避免基层变形。从建筑质量的角度来看,加强钢筋混凝土坡屋面防水技术应用,能够在一定程度上保证建筑的整体性与安全性,有利于延长建筑的使用寿命。

关键词：钢筋混凝土坡屋面结构屋面渗漏防水技术

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Mining Myb transcription factors related to wood development in Larix olgensis

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Journal of Forestry Research 2020年第6期31卷 2453-2461页

作者： Jiali Zhao Huanhuan xiong junhui Wang Hanguo Zhang Lei Zhang State Key Laboratory of Tree Genetics and Breeding Northeast Forestry UniversityHarbin 150040People’s Republic of China State Key Laboratory of Tree Genetics and Breeding Chinese Academy of ForestryBeijing 100081People’s Republic of China

Larix olgensis A.Henry is a fast-growing tree used for aff orestation in northeastern China and has great ecological and economic value.For studying developmental genes in the xylem of this species,we investigated the Myb transcription factor family,one of the largest families of transcription factors in plants,which plays an important role in the regulation of lignifi cation in plant secondary walls.By sequencing a L.olgensis cDNA library using the Illumina HiSeq2500 high-throughput sequencing platform,we obtained 58,683 unigene sequences,of which 16,554 unigenes were longer than 1000 bp,accounting for 28.2%of the total database.The alignment of these genes with the GO,COG,KEGG,Swiss-Prot and NR databases resulted in annotated 29,350 unigenes.We obtained a total of 1460 differentially expressed genes,of which 453 were upregulated and 1007 were downregulated at the two developmental stages analyzed.The gene annotations showed a wide range of biological functions and metabolic pathways.The 10 Myb transcription factors that were obtained from the diff erentially expressed genes were analyzed by real-time quantitative PCR(qRT-PCR).The results showed that four Myb transcription factors may be associated with xylem development in L.olgensis.Due to the large genome size of conifers,genomics research on these species has lagged behind that for other plant groups.Our data provide the basis for further studies on xylem development in L.olgensis.

关键词： Larix olgensis RNA-seq Myb transcription factors Diff erentially expressed genes

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阿斯塔纳轻轨简支梁极限荷载试验研究

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市政技术 2021年第3期39卷 44-50,77页

作者：熊军辉北京城建道桥建设集团有限公司北京100022

依托哈萨克斯坦国阿斯塔纳轻轨项目,延用前苏联标准,采用两点等效集中荷载法,对25 m和30 m的预应力混凝土箱梁进行了极限荷载下的破坏性试验研究,以检验设计和施工质量是否符合规范要求。在采用中哈两国标准计算、推导、差异性对比的基... 详细信息

依托哈萨克斯坦国阿斯塔纳轻轨项目,延用前苏联标准,采用两点等效集中荷载法,对25 m和30 m的预应力混凝土箱梁进行了极限荷载下的破坏性试验研究,以检验设计和施工质量是否符合规范要求。在采用中哈两国标准计算、推导、差异性对比的基础上,采用我国设计建立的数字模型,按相同方式进行模拟分析,并与现场试验结果进行了对比。其结果表明,中国的设计方法和理论具有先进性和合理性,可为中哈两国桥梁标准间的融合、技术合作起到一定的示范作用。该研究成果和方法可供同行参考。

关键词：箱梁两点等效集中荷载法极限荷载模拟试验中哈两国标准差异

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高速飞行器小速度比交会问题及方法特性研究

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哈尔滨工程大学学报 2015年第5期36卷 657-661,729页

作者：熊俊辉唐胜景郭杰北京理工大学宇航学院飞行器动力学与控制教育部重点实验室北京100081 湖北航天技术研究院总体设计所湖北武汉430040

针对传统的尾追方法在目标速度大于拦截器的速度时无法拦截目标的问题,建立拦截器与目标交会问题的三维运动模型,基于准平行接近原则对比研究适用于速度比小于1的迎击及前向拦截的速度比条件、有效拦截区域、需用过载、允许初始距离及... 详细信息

针对传统的尾追方法在目标速度大于拦截器的速度时无法拦截目标的问题,建立拦截器与目标交会问题的三维运动模型,基于准平行接近原则对比研究适用于速度比小于1的迎击及前向拦截的速度比条件、有效拦截区域、需用过载、允许初始距离及导引特性。研究表明,两种方法的有效拦截区域取决于速度比及目标速度矢量前置角,对目标机动有类似的过载需求,但迎击的允许初始距离远大于前向拦截。仿真显示,迎击的交会时间及路径较前向拦截短,但过大的接近速率使其视线角速率过早发散,末段需用过载迅速增大。

关键词：速度比交会制导方法迎击拦截前向拦截高速飞行器

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热塑性复合材料建筑模板在通州环隧工程施工中的应用

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市政技术 2014年第S1期32卷 165-167,170页

作者：熊军辉北京城建道桥建设集团有限公司北京100124

随着我国建筑业的蓬勃发展,现浇混凝土结构猛增,其模板技术的革新有助于提高工程质量、降低成本、缩短工期。热塑性复合材料建筑模板是一种最具代表性的新型材料,具有绿色环保、节能高效的优点。笔者以北京市通州北环环隧地下工程厚大... 详细信息

随着我国建筑业的蓬勃发展,现浇混凝土结构猛增,其模板技术的革新有助于提高工程质量、降低成本、缩短工期。热塑性复合材料建筑模板是一种最具代表性的新型材料,具有绿色环保、节能高效的优点。笔者以北京市通州北环环隧地下工程厚大顶板、侧墙结构模板设计与施工为例,详细介绍了热塑性复合材料模板的施工工艺、技术要点及注意事项,可为类似工程提供参考。

关键词：热塑性复合材料结构模板应用

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