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A new PM_(2.5)-based CADR method to measure air infiltration rate of buildings

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Building Simulation 2021年第3期14卷 693-700页

作者： Cong Liu Siyu Ji Fengjiao Zhou Qingbin Lin yiqi chen Xiaoliang Shao School of Energy and Environment Southeast UniversityNanjingJiangsu 210096China School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China

Air infiltration is an important way to exchange indoor air with *** significantly impacts energy consumption and air quality of *** particles(PM_(2.5))in the outdoor atmosphere environment are a potential natural tracer for the measurement of air infiltration rate,especially in the long term field *** this study,a PM_(2.5)-based method,named as CADR(clean air delivery rate)method,is developed to supplement traditional tracer gas method in order to make routine measurement in realistic environments possible and *** air cleaner is installed indoors to reduce indoor PM_(2.5) *** infiltration is determined by fitting a model to the decreasing concentration *** with CO_(2) decay method in four different indoor environments gives a normalized mean error of 19%and a correlation coefficient of 0.80 for this *** justifies the CADR method as a feasible option to measure air infiltration *** subject to several constraints,the proposed method would facilitate field measurement under realistic conditions by being combined with current tracer gas methods.

关键词： natural ventilation outdoor-indoor-connection haze formaldehyde VOCs exposure

Feasibility and utility of intraoperative optical coherence tomography during vitreoretinal surgery:A 4-year report in Chinese population

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Journal of Innovative Optical Health Sciences 2021年第1期4卷 46-55页

作者： Jiwei Tao Huan chen Jiafeng Yu Dan cheng yiqi chen Jianbo Mao Jia Fang Lijun Shen Department of Retina Center Affiliated Eye Hospital of Wenzhou Medical University HangzhouZhejiang ProvinceP.R.China

The objective is to introduce the application of intraoperative optical coherence tomography(iOCT)in pars plana vitrectomy(PPV)for various vitreoretinal diseases,and to report the 4-year assessment of feasibility and utility in Chinese *** reported a retrospective case series of patients who underwent PPV and iOCT scan at Eye Hospital of Wenzhou Medical University from January 2016 to January *** characteristics were documented before operation,and we intraoperatively recorded the time and results of iOCT scanning,specific surgical maneuvers performed,the consistency with the planned strategies before surgery,the type of OCT images obtained,and adverse events(AEs).The surgeon feedback was collected to evaluate the utility of iOCT during *** total 339 eyes successfully completed iOCT scan,with an average scanning time of 3.54±2.3 min,including 59 cases of idiopathic macular hole(iMH),134 cases of idiopathic epiretinal membrane(iERM),33 cases of lamellar macular hole(LMH),40 cases of high myopic maculopathy,13 cases of vitreous macular traction(VMT),60 cases of dense vitreous hemorrhage(VH).The iOCT findings were not consistent with exami-nation under the operating microscope in 49 cases(14.5%),including 29 cases(8.6%)which changed the operation strategies during *** Hole-door phenomenon arose in 20 cases(33.9%)of iMH and 3 cases(25%)of high myopic MH after ILMs ***,the residue ERM was observed in nine cases(6.7%)of iERM and two cases(14.3%)in high myopic ERM after ILMs *** new surgical methods could also be confirmed using *** ap-plication of iOCT has a significant clinical functionality in vitreoretinal surgery,providing the surgeon with a new surgical understanding,guiding the selection of a more reasonable operative procedure during surgery,predicting postoperative recovery and improving postoperative outcomes.

关键词： Intraoperative optical coherence tomography vitreoretinal diseases pars plana vit-rectomy surgical guidance

Contribution of Winter SSTA in the Tropical Eastern Pacific to Changes of Tropical Cyclone Precipitation over Southeast China

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Journal of Meteorological Research 2022年第2期36卷 282-291页

作者： Xianghua WU Qihao ZHU Chao WANG Yue ZHOU yiqi chen Xintong TIAN Yajie HUA School of Mathematics and Statistics Nanjing University of Information Science&TechnologyNanjing 210044 Key Laboratory of Meteorological Disaster of Ministry of Education/Joint International Research Laboratory of Climate and Environment Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters and Earth System Modeling Center Nanjing University of Information Science&TechnologyNanjing 210044 Hubei Key Laboratory for Heavy Rain Monitoring and Warning Research Institute of Heavy RainChina Meteorological AdministrationWuhan 430074

Tropical cyclone precipitation(TCP)accounts for 10%-40%of the boreal summer precipitation that occurs over Southeast China(SEC),causing flood disasters and serious *** the decadal scale,TCP increases significantly in SEC while TC frequency decreases in the western North Pacific(WNP)during ***,variations in TCP and the corresponding physical mechanism are investigated in this ***,an empirical statistical method is introduced to quantify the TCP amount based on accumulated cyclone energy(ACE)and TC frequency with the TCP anomaly decomposed into three items(rainfall frequency,rainfall intensity,and nonlinear item).ACE,as the integration of TC intensity and frequency,is a more effective index than TC frequency for depicting the characteristics of TCP because the contribution of rainfall frequency represented by ACE is higher than that of TC ***,the physical mechanism affecting the WNP TC activities and TCP in SEC are *** sea surface temperature anomaly(SSTA)over the tropical eastern Pacific(TEP)in winter can trigger variations of air-sea interaction over the tropical Pacific,including low-level divergent winds,mid-tropospheric descent flows,high-level convergent winds coupled with negative anomalies of vorticity and humidity over the tropical western Pacific(TWP)in the next *** dynamic conditions provide unfavorable environments for TC activities in the WNP and constrain TCP in ***,more significantly negative SSTA events in the TEP facilitate enhanced ACE along with positive relative vorticity,relative humidity,and upwelling vertical winds anomalies over the coast of SEC after 1998,which is a reasonable explanation for the increasing TCP in SEC.

关键词： tropical cyclone precipitation accumulated cyclone energy sea surface temperature anomaly air–sea interaction

Development Prospect of Aromatherapy Industry in Yunnan Province

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Asian Agricultural Research 2014年第1期6卷 42-44,48页

作者： Ziyun PENG Dantong LI Rui chen Min QIAN yiqi chen Hongjun YANG Agricultural Economics and Information Research Institute Yunnan Academy of Agricultural Sciences

This paper firstly introduced domestic and foreign supply of products processed by aromatherapy plant. On the basis of predicting market demand of aromatherapy plant,it analyzed current development situation of the plant in Yunnan Province. It arrived at the conclusion that the industry has broad market prospect. Then,it analyzed competitive advantages and risk factors of aromatherapy plant in Yunnan Province. There are climate,location and price advantages,but due to lack of product standard,it is difficult to guarantee quality,and there are certain market risks. Finally,it put forward recommendations for development of aromatherapy industry:( 1) taking full advantage of preferential policies to set up leading enterprises and realize radiated development;( 2) bringing into play of resource advantages and introducing capitals and technologies;( 3) Fostering market and driving the industrial development.

关键词： Aromatherapy plant Industrial development Prospect

Classifications and Functions of Vitreoretinal Surgery Assisted Robots——A Review of the State of the Art

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Classifications and Functions of Vitreoretinal Surgery Assis...

Adaptive Control of Bottom Hole Pressure in High-Pressure Brine Layer

作者： XIAO Jingjing WU Qiyan SUN Daoheng HE Changyan chen yiqi School of Aerospace Engineering Xiamen University Xiamen Hongfa Electroacoustic Co. Ltd School of Mechanical Engineering and Automation Beihang University The Eye Hospital of Wenzhou Medical University

To overcome the surgeon’s manual operation limitations in vitreoretinal microsurgery,many kinds of robots are developed to enhance the operation accuracy,including Master-Slave Teleoperation Robot（MSTR）,Hand-Held Robot（HHR）,Cooperative Robot（CR） and Micro Robot（MR）.With the introduction of vitreoretinal surgical assisted robots（VRSARs）,the surgeon’s operation skills can be improved through various functions of the robots,such as depth information perception,improvement of the surgical precision,and micro-force perception and *** description and classification of the latest research progress of VRSARs,the current problems of each type of VRSARs were discussed and future works summarized for further research.

关键词： Vitreoretinal Surgery Assisted Robots(VRSARs) Depth Information Perception Improvement of Surgical Precision Micro-force Perception and Feedback

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Adaptive Control of Bottom Hole Pressure in High-Pressure Br...

Monitoring and identifying pendant droplets in microbottle resonators

第43届中国控制会议

作者： Zhuoran Meng Baochang Xu Song Hu yiqi chen Shixuan Yin College of Information Science and Engineering China University of Petroleum (Beijing)

With the continuous deepening of exploration and development, the problem of saltwater overflow is *** of high-pressure brine leads to stratification and settlement of drilling fluid, which can damage the performance of the drilling fluid and cause wellbore pressure instability. Therefore, a class of first-order linear 2×2 hyperbolic PDE systems is established, and an adaptive observer based on the swapping design method is derived to identify the drilling fluid density and related unknown parameters after saltwater intrusion into the wellbore. Next, an adaptive controller based on infinite dimensional backstepping is designed for the identified PDEs system. Finally, This method is applied to cases of saltwater overflow. It is found that the identification results of density can converge to the actual value within 10s, and the controller has stronger robustness.

关键词： Drilling brine overflow bottom hole pressure hyperbolic PDEs swapping design adaptive control

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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 ***,we propose an optofluidic microbottle resonator(OFMBR)that is applied to generate pendant droplets,whose maximum mass is related to the liquid surface *** and type of droplets forming along the OFMBR stem can be monitored in real time by spectrum *** 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 *** operation mechanism of the proposed sensors is validated by theoretical simulation and experimental *** the experimental spectra,a liquid mass sensor with maximum sensitivity of−3.34pm/mg is obtained,and distilled water and alcohol can be *** scheme provides a new thread for droplet generation as well as fluidic properties characterization.

关键词： mechanism coupling alcohol

第三个奇迹:中国-东盟命运共同体建设进程及展望

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云南师范大学学报（哲学社会科学版） 2020年第5期52卷 134-144页

作者：翟崑陈旖琦北京大学国际关系学院北京100871

2021年是中国与东盟建立对话关系30周年。近30年来,中国与东盟关系实现了从建立对话关系到战略伙伴关系,再到共建命运共同体的共同演化。中国与东盟国家在双边层面、东盟组织层面以及在东亚合作框架内,形成了多元复合的合作局面。虽然... 详细信息

2021年是中国与东盟建立对话关系30周年。近30年来,中国与东盟关系实现了从建立对话关系到战略伙伴关系,再到共建命运共同体的共同演化。中国与东盟国家在双边层面、东盟组织层面以及在东亚合作框架内,形成了多元复合的合作局面。虽然南海问题长期难解,但基本保持在可控范围。中国与东盟面向和平与繁荣的制度性合作升级,逆转了冷战期间中国与该地区的对抗、冲突,甚至战争局面,堪称奇迹。中国与东盟在后冷战时代所创造的总体上“和平繁荣”局面,根源于各自的正向发展与良性互动,也就是“东盟奇迹”和“中国奇迹”的融合共进。“东盟奇迹”是指东盟成立50多年来所创建的“地区和平生态系统”马凯硕,孙合记.东盟奇迹[M].翟崑,王丽娜,等,译,北京:北京大学出版社,2017:41~44.,“中国奇迹”是指中国40多年来的改革开放与和平发展。因此,以中国-东盟命运共同体为标志的双方关系的良性发展,就是本文所提的“第三个奇迹”。翟崑.探索后冷战时代东南亚地区的演进之道[J].东南亚研究,2019,(6).本文的立意是探究第三个奇迹何以形成,受何制约,以及如何维护其良性发展。主要结论如下:第一,中国-东盟命运共同体是双方关系在后冷战时代的提质升级,是中国人类命运共同体建设与东盟共同体建设这两个战略体系的对接。第二,中国-东盟命运共同体建设本质上是双方制度化合作的延续和升级,从区域内外比较来看,取得了不错的成效。第三,中国和东盟之所以能克服障碍并保持升级合作,是因为双方借势后冷战时代国际战略格局演变,创造性地克服内外合作困境,促进了地区系统的优化。第四,中国-东盟命运共同体的发展也面临体系性、结构性和策略性挑战,面临天花板效应,但仍有发展空间,其共建方向应该是“通而不统”,以“通”(互联互通)而不是以“统”(一体化或结盟)为目标,追求多元复合、四通八达、多方舒适的制度化合作。

关键词：中国-东盟命运共同体第三个奇迹

统编高中思想政治教科书《当代国际政治与经济》的教材逻辑——兼谈中国青少年国际素养的培育

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课程．教材．教法 2023年第6期43卷 90-98页

作者：翟崑陈旖琦北京大学国际关系学院北京100871 北京大学区域国别研究院北京100871 广州市执信中学广州510715

培育中国青少年的国际素养,是发展高中思想政治学科核心素养的应有之义,是新时代中国特色社会主义伟大实践的迫切需要,也是以习近平新时代中国特色社会主义思想铸魂育人、立德树人的客观要求。统编高中思想政治选择性必修1《当代国际政... 详细信息

培育中国青少年的国际素养,是发展高中思想政治学科核心素养的应有之义,是新时代中国特色社会主义伟大实践的迫切需要,也是以习近平新时代中国特色社会主义思想铸魂育人、立德树人的客观要求。统编高中思想政治选择性必修1《当代国际政治与经济》是落实高中学生国际政治经济素养培育的专门教材。它在思想上遵循“培育爱国关天下的国际素养”的价值逻辑,在内容上以“掌握大变局之下的竞合博弈”为知识逻辑,其实践逻辑是“关注并投入鲜活的现实实践”。经过一段时间的教学实践和调研发现,有必要对本册教材的基本原理和底层逻辑作进一步的说明,帮助教师在使用《当代国际政治与经济》进行教学的过程中透彻地理解教材的逻辑关系及核心概念,以更好地实现高中思想政治学科教学目标及育人价值。

关键词：高中思想政治统编三科教材青少年国际素养国际政治与经济