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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 ***,the polycyclic aromatic hydrocarbons and N-containing species in biomass pyrolysis vapors result in the soot and NO *** flue gas recirculation(FGR)technology,having the potential to reduce the soot and NO emissions,was introduced to the biomass pyrolysis-combustion *** addition,it was numerically studied by simulating the biomass pyrolysis vapors based co-flow diffusion flames with CO_(2)*** the experimental and simulated results showed that the FGR had significant suppression effects on the soot *** 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 *** 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 *** decrease in benzo(a)pyrene(BAPYR)concentration was the major factor in the decrease in soot condensation ***,the decrease in the C_(2)H_(2) and OH concentrations was responsible for the decrease in the HACA surface growth ***,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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Discovery of carbonaceous compressions and their multicellular tissues from the Changzhougou Formation (1 800 Ma) in the Yanshan range, North China

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Chinese Science Bulletin 2000年第9期45卷 841-847页

作者： ZHU Shixing SUN Shufen HUANG Xueguang he yuzhen ZHU Gengxin SUN Lixin ZHANG Kuan Tianjin Institute of Geology and Mineral Resources Chinese Academy of Geological SciencesTianjin 300170China Regional Geological Survey Institute Hebei Bureau of Geology and ExplorationLangfang 065001China

In 1997 and 1998, hundreds of specimens of megascopic carbonaceous compressions or algal fossils were found from - 1800-million-year old Changzhougou Formation, which is the lowermost unit of the latest Palaeoproterozoic Changcheng Group (~1 600-1 800 Ma) in the Xinglong-Kuancheng areas at the middle Yanshan Range, North China. They are discoid, ellipsoid and sausage-like, namely shaped like Chuaria Shouhsiennia (Ellipsophyta) and Tawuia. By adopting HF acid-resistant maceration coupled with scanning electron microscope and petrologic section, the authors made a preliminary research on the histology for some circular and ellipsoid carbonaceous compressions, namely Chuaria- and Shouhsienia-llke forms, in addition to their morphology. The following three types of multicellular tissues have been found in the fragments of them: colony-like, pseudoparenchyma-like and parenchyma-like. All of the new data about multicelluar tissues not only supply a very important basis in histology to determine the

关键词： multicellular tissues Carbonaceous compressions Changzhougou Formation Changcheng Group.

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Will the U.S. Economy Switch Back to Its Pre-crisis Path?

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Contemporary International Relations 2015年第4期25卷 21-27页

作者： Yu Xiang he yuzhen the Institute of American Studies CICIR

The *** began to grow out of the financial crisis in the second quarter of 2009,the first to get out of the crisis quagmire among western *** indicates its overall economic strength is returning,but will it resume its traditional dominant pattern in which the financial sector plays a big role?The proportion of the financial service sector within the entire U.S.

关键词：美国经济路径金融危机西方国家经济实力金融部门数据表

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Why Do Ordinary Americans Not Feel Recovered?

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Contemporary International Relations 2015年第4期25卷 28-33页

作者： Qian Liwei he yuzhen the Institute of American Studies CICIR

If the *** is getting better,why can’t ordinary Americans feel it?Given the unemployment and economic statistics being touted of late,shouldn’t voters have more confidence in the president and his party as the November 2016 general elections loom?Even in 2014 as the country grew further away from recession lows,outshining economies in most

关键词：美国人社会经济问题美国经济经济统计经济衰退经济增长发达国家支持率

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The pivotal role of microglia in injury and the prognosis of subarachnoid hemorrhage

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Neural Regeneration Research 2025年第7期20卷 1829-1848页

作者： Wenjing Ning Shi Lv Qian Wang yuzhen Xu Department of Rehabilitation The Second Affiliated Hospital of Shandong First Medical UniversityTaianShandong ProvinceChina Department of Central Laboratory The Affiliated Taian City Central Hospital of Qingdao UniversityTaianShandong ProvinceChina

Subarachnoid hemorrhage leads to a series of pathological changes,including vascular spasm,cellular apoptosis,blood–brain barrier damage,cerebral edema,and white matter ***,which are the key immune cells in the central nervous system,maintain homeostasis in the neural environment,support neurons,mediate apoptosis,participate in immune regulation,and have neuroprotective *** evidence has shown that microglia play a pivotal role in the pathogenesis of subarachnoid hemorrhage and affect the process of injury and the prognosis of subarachnoid ***,microglia play certain neuroprotective roles in the recovery phase of subarachnoid *** approaches aimed at modulating microglia function are believed to attenuate subarachnoid hemorrhage *** provides new targets and ideas for the treatment of subarachnoid ***,an in-depth and comprehensive summary of the role of microglia after subarachnoid hemorrhage is still *** review describes the activation of microglia after subarachnoid hemorrhage and their roles in the pathological processes of vasospasm,neuroinflammation,neuronal apoptosis,blood–brain barrier disruption,cerebral edema,and cerebral white matter *** also discusses the neuroprotective roles of microglia during recovery from subarachnoid hemorrhage and therapeutic advances aimed at modulating microglial function after subarachnoid ***,microglia in subarachnoid hemorrhage are targeted with TLR inhibitors,nuclear factor-κB and STAT3 pathway inhibitors,glycine/tyrosine kinases,NLRP3 signaling pathway inhibitors,Gasdermin D inhibitors,vincristine receptorαreceptor agonists,ferroptosis inhibitors,genetic modification techniques,stem cell therapies,and traditional Chinese ***,most of these are still being evaluated at the laboratory *** clinical studies and data on subarachnoid hemorrhage are required to improve the treatment of subarachnoid hemor

关键词： apoptosis blood–brain barrier brain edema microglia neuroinflammation neuron neuroprotection subarachnoid hemorrhage vasoconstriction white matter injury

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1960—2020年珠江流域跨季节尺度干旱时空变化

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农业工程学报 2024年第13期40卷 77-84页

作者：张灵吴恩捷潘浩桦张朱琳何钰珍广州大学地理科学与遥感学院广州510006

全球气候变化背景下,珠江流域干旱事件尤其是跨季节干旱事件频发,研究珠江流域不同时间尺度下的干旱时空特征对于流域水资源配置和农业结构调整至关重要。为了了解珠江流域跨季节干旱时间时空变化特征,研究基于1960—2020年珠江流域44... 详细信息

全球气候变化背景下,珠江流域干旱事件尤其是跨季节干旱事件频发,研究珠江流域不同时间尺度下的干旱时空特征对于流域水资源配置和农业结构调整至关重要。为了了解珠江流域跨季节干旱时间时空变化特征,研究基于1960—2020年珠江流域44个气象站逐日气象观测数据,计算不同时间尺度下的标准化降水蒸散指数(standardized precipitation evapotranspiration index,SPEI),结合线性倾向估计法、Mann-Kendall突变检验以及Morlet小波分析,分析了近60 a来珠江流域跨季节干旱时空变化特征。结果表明:1)1960—2020年间珠江流域跨季节干旱事件中,秋冬及秋冬春连旱化趋势显著,呈弱干旱化趋势,且干旱化频率有所上升,连旱强度以中旱和轻旱为主,连旱影响范围以局域性为主,其次为全域性,秋冬春季节连旱在1962年和1997年分布出现由干转湿和由湿转干的突变。2)珠江流域秋冬及秋冬春季节连旱普遍存在9~14 a变化周期,相关分析表明珠江流域干湿变化与同期厄尔尼诺现象显著相关。3)珠江流域秋冬及秋冬春季节连旱尺度下大致呈东西干而中间湿的空间分布格局,红水河至左江及郁江流域连旱化趋势减弱,但连旱化频率仍较高,东江流域秋冬季节连旱化频率高且呈弱连旱化趋势,湿润化速率自西南向东北递减,未来发生季节连旱风险高。研究结果可为珠江流域干旱监测与防灾减灾措施提供指导和建议。

关键词：干旱珠江流域 SPEI 时空特征 M-K突变检验 Morlet小波分析

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A Brief Review of Interlanguage

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校园英语 2017年第22期 212-212页

作者： he yuzhen Foreign Studies School Yanshan University

Interlanguage has gradually become an important theory in Second language Acquisition since it was initially proposed in late 1960 s and early 1970 s. This paper mainly introduces the research process of interlangugae theory for 40 years, focusing on the proposal, development, and characteristics of interlanguage. At the same time, the thesis provides some suggestions and inspiration for future researches, especially the researches of language teaching, in terms of the research method, research content and research level.

关键词： Brief Review Interlanguage

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劳务出资的法律问题探析

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长春理工大学学报（社会科学版） 2007年第3期20卷 43-46页

作者：贺玉珍吉林大学法学院吉林长春130012

通过对劳务出资的必要性和适格性分析,得出劳务资本合法化的必要性。依据我国现行公司法关于股东出资形式的规定,劳务资本由于具有货币可估价性、可依法转让性和合法性,应该包含在合法的出资形式之列。并进一步对劳务出资的立法规定,从... 详细信息

通过对劳务出资的必要性和适格性分析,得出劳务资本合法化的必要性。依据我国现行公司法关于股东出资形式的规定,劳务资本由于具有货币可估价性、可依法转让性和合法性,应该包含在合法的出资形式之列。并进一步对劳务出资的立法规定,从劳务出资记入注册资本、劳务出资的最高比例、劳务出资的流通性限制、评估机构的责任、破产时出资者的责任承担等问题进行分析,提出自己的观点。

关键词：劳务出资制度效率价值资产信用

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Java课程教学改革与实践

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计算机时代 2014年第10期 64-65页

作者：贺玉珍运城学院计算机科学与技术系山西运城044000

针对Java课程教学特点及传统教学中存在的问题,对课程教学内容的整合、课堂教学和实践教学的组织、教学方法的综合运用、课程实训方法的选择与实施,以及考核方案的设定等环节进行了教学改革。实践表明,这些改革对提高学生的实践能力和... 详细信息

针对Java课程教学特点及传统教学中存在的问题,对课程教学内容的整合、课堂教学和实践教学的组织、教学方法的综合运用、课程实训方法的选择与实施,以及考核方案的设定等环节进行了教学改革。实践表明,这些改革对提高学生的实践能力和就业竞争能力有一定的帮助。

关键词： Java 教学改革实践教学项目驱动

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Anomalous quality factor evolution of induced transparency in a virtualized coupled-oscillator system

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 148-155页

作者： Yunhan Yang Han Jia Tuo Liu yuzhen Yang Jun Yang Key Laboratory of Noise and Vibration Research Institute of Acoustics Chinese Academy of Sciences University of Chinese Academy of Sciences State Key Laboratory of Acoustics Institute of Acoustics Chinese Academy of Sciences

The phenomenon of induced transparency, characterized by a high quality(Q) factor, holds significant importance in the fields of high-precision sensing, energy storage and wave manipulation. Conventional transparency systems are often constrained by the limited experimentally accessible parameter space and the lack of independent control over intrinsic parameters, thereby hindering advanced research on high-Q effects. here we propose a virtualized coupled-oscillator system that enables reconfigurable induced transparency in the reflection spectrum. By virtually incorporating a pair of coupled oscillators into an individual acoustic meta-atom, we achieve the manipulation of induced transparency in a decoupled, wide-ranging, and elaborate manner. Exploiting the diverse evolutions across the intrinsic parameter space, we show experimentally a counter-intuitive increase in the Q-factor of the transparency window, which is attributed to the enhanced dissipation of the bright ***, a constant group delay at the center frequency is observed accompanying this evolution. Our work demonstrates an intriguing platform as well as a novel strategy to engineer high-Q induced transparency phenomenon, and paves the way towards applications in programmable acoustic sensors, filters and slow-wave devices.

关键词： induced transparency acoustic meta-atom high quality-factor scattering programmable intrinsic parameter

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