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Isobaric vapor–liquid equilibrium for binary system of aniline+methyl-N-phenyl carbamate

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Chinese Journal of Chemical Engineering 2016年第10期24卷 1470-1476页

作者： yuqian li liguo Wang Peng He Kelin Huang Huiquan li Yan Cao Chemistry and Material Science College Guangxi Teacher Education University Key Laboratory of Green Process and Engineering National Engineering Laboratory for Hydrometallurgical Cleaner Production TechnologyInstitute of Process EngineeringChinese Academy of Sciences China Academy of Science & Technology Development Guangxi Branch

In this study,the quasi-static ebulliometric method was used to measure both of the vapor pressures of methyl N-phenyl carbamate(MPC),and the isobaric vapor–liquid equilibrium(VLE) data of the aniline and MPC binary *** measured vapor pressure data of MPC,at different temperature ranging from 369.60 to 389.54 K,fitted well with the Antoine *** VLE data for the aniline and MPC system at(2.00,4.00,6.00,7.00 and 8.00) k Pa were correlated by both of nonrandom two-liquid(NRTL) and Wilson *** parameters of the two models were obtained by regressing the experimental data,with the absolute temperature deviations of 0.54 K and 0.53 K,*** relative volatility of the binary system calculated was all far more than 1,which gives the conclusion that the high purity MPC can be separated from aniline and MPC binary system by rectification or distillation technology.

关键词： Vapor-liquid equilibrium Aniline Methyl N-phenyl carbamate NRTL Wilson

The impacts of fabrication systems on 3D concrete printing building forms

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Frontiers of Architectural Research 2022年第4期11卷 653-669页

作者： Shuyi Huang Weiguo Xu yuqian li School of Architecture Tsinghua UniversityBeijingChina

Recently,3D concrete printing(3DCP)technology starts entering the market from factories and laboratories,contributing to the creation of new construction methods and architectural ***,since the technologies of most 3DCP institutions are independently developed,there is a lack of consensus in terms of construction methods and development approaches in the *** this paper,based on 423DCP architectural works completed in last five years,a quantitative analysis was made to evaluate the impacts of the fabrication system on 3DCP building *** paper introduced three criteria,including Workspace Index,Geometric Complexity Index,and Tectonic Prospect Index,analyzing and answering the discussions about"adopting in-situ printing or prefabrication","using gantry printers or robotic arms"from the perspective of architectural *** analyzing specific construction methods and design strategies in these projects,the research summarized three development trends,"mobile equipment,algorithmic structure,and intelligent construction",which will affect the future development of 3DCP building ***,the paper discussed the advantages,limitations,and potential of four different 3DCP fabrication systems,expecting to point out the directions to further optimize each system and realize more diverse 3DCP buildings.

关键词： 3D concrete printing Fabrication system Building form Robotic system 3D printing Gantry system 3D printing Prefabrication In-situ fabrication

High Capacity and Superior Rate Performances Coexisting in Carbon-Based Sodium-Ion Battery Anode

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Research 2019年第1期2019卷 833-841页

作者： yuqian li liyuan Zhang Xiuli Wang Xinhui Xia Dong Xie Changdong Gu Jiangping State Key Laboratory of Silicon Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang ProvinceSchool of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China Guangdong Engineering and Technology Research Center for Advanced Nanomaterials School of Environment and Civil EngineeringDongguan University of TechnologyDongguan 523808China

Amorphous carbon is considered as a prospective and serviceable anode for the storage of *** this contribution,we illuminate the transformation rule of defect/void ratio and the restrictive relation between specifc capacity and rate *** by this mechanism,ratio of plateau/slope capacity is regulated via temperature-control ***,pore-forming reaction is induced to create defects,open up the isolated voids,and build fast ion channels to further enhance the capacity and rate *** fast ion channels,high ion-electron conductivity,and abundant defects lead the designed porous hard carbon/Co_(3)O_(4) anode to realize a high specifc capacity,prolonged circulation ability,and enhanced capacity at high *** research deepens the comprehension of sodium storage behavior and proposes a fabrication approach to achieve high performance carbonaceous anodes for sodium-ion batteries.

关键词： Battery capacity defects

Detection of composition of functional component theabrownins in Pu-erh tea by degradation method

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Food Science and Human Wellness 2022年第3期11卷 643-647页

作者： Simin Hu Xiaolei li Chuangchuang Gao Xianyu Meng Mingchao li yuqian li Tianrui Xu Qian Hao Faculty of life Science and Technology Kunming University of Science and TechnologyKunming 650500China Research Center for Analysis and Measurement Kunming University of Science and TechnologyKunming 650093China

Habitual tea consumption can reduce the risk of ASCVD morbidity and mortality and all-cause mortality in China,and long-term adherence to this habit can provide greater ***-erh tea is one of the representatives of post-fermented teas,and the polymers in Pu-erh tea have anti-cancer and anti-hyperlipidemic activities,but their chemical composition is still *** this study,the chemical composition of Pu-erh tea was investigated in detail and eight(1–8)known compounds were *** polymers in Pu-erh tea were also degraded by thiol degradation,and the fragments of quercetin and(–)-epicatechin-3-O-gallate were found in the thiol degradation products of Pu-erh tea polymers by UPLC observation and separation and *** is the first time that this fragment was obtained in Pu-erh tea polymer.

关键词： Pu-erh tea Polymer Theabrownin Thiol degradation

A green method for synthesizing novel nanoparticles and their application in flexible conductive patterns

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Journal of Materiomics 2020年第2期6卷 300-307页

作者： Wei li Qiongying Cen Wenjiang li Zihan Zhao Wenlong Yang yuqian li Minfang Chen Guang Yang Jinjun Yang School of Materials Science and Engineering Tianjin Key Lab for Photoelectric Materials&DevicesNational Demonstration Center for Experimental Function Materials EducationTianjin University of TechnologyTianjin300384China Tianjin Key Laboratory of Hazardous Waste Safety Disposal and Recycling Technology School of Environmental Science and Safety EngineeringTianjin University of TechnologyTianjin300384China

A general and unified approach to synthesize Ag,Cu and Au nanoparticles(NPs)is developed at room temperature in air atmosphere under ultrasonication in poly(N-vinylpyrrolidone)(PVP)solutions with ascorbic acid and glucose as the reducing and nucleation agents,***,TEM,and HR-TEM analysis of the Ag,Cu,and Au NPs confirm purity and average diameters of 15.5±2.0 nm,50±3.0 nm,and 10±1.0 nm,*** ultrasonic-assisted mechanism,wherein reduction occurs readily and produces anti-oxidation particles,is proposed and *** infrared sintering was used to avoid damaging the substrate of conductive patterns whose resistivity at 10 W(~50℃)sintering power for less than 6 min reached up to 10±0.5 μΩ cm,40±3.0 μΩ cm,and 280±5 μΩ cm for Ag,Cu,and Au patterns,***-based electrodes were produced successfully and exhibited excellent flexibility and good *** potential of this method for large scale production is discussed.

关键词： Novel nanoparticles Conductivity Ultrasonic-assisted Infrared sintering

Trends of Underweight Malnutrition Among Chinese Residents Aged 60 Years and Above—China,1992−2015

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China CDC weekly 2021年第11期3卷 232-236页

作者： Pengkun Song Qingqing Man yuqian li Shanshan Jia Dongmei Yu Zhen liu Jian Zhang National Institute for Nutrition and Health Chinese Center for Disease Control and Prevention.BeijingChinaKey Laboratory of Trace Element NutritionNational Health Commission of the People’s Republic of ChinaBeijingChina.

Summary What is already known about this topic?The prevalence of underweight malnutrition largely decreased in Chinese adults in recent thirty years while obesity became increasingly ***,underweight malnutrition still affected elderly populations and increased risk of anemia,infection diseases,some non-communicable chronic diseases and disability.

关键词： diseases anemia weight

Reduced-order design of Robust H_∞ Controller for an Inertial Stabilized Aerial Platform

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Instrumentation 2019年第3期6卷 2-9页

作者： Xiangyang ZHOU yuqian li Chao YANG School of Instrumentation and Optoeletronic Engineering Beihang University(BUAA)Beijing 100191China Beijing Academy of Quantum Information Sciences Beijing 100193China

The uncertainty disturbance is one of the main disturbances that seriously influences the stabilization precision of an aerial inertially stabilized platform(ISP)*** this paper,to improve the stabilization precision of the ISP under disturbance uncertainty,a robust H∞controller is designed in this ***,the reduction order is carried out for high-order controllers generated by the robust H∞loop shaping control *** application of the minimum implementation and balanced truncation algorithm in controller reduction is ***,the principle of reduced order of minimum implementation and balanced truncation are ***,the method is used to reduce the order of the high-order robust H∞loop shaping ***,the method is analyzed and verified by the simulations and *** results show that by the reduced-order method of minimum implementation and balanced truncation,the stabilization precision of the robust H∞loop shaping controller is increased by about 10%.

关键词： Aerial Remote Sensing Inertial Stabilization Platform Robust H_∞Control Controller Reduction Balanced Truncation

“青焦”的诞生:高校青年教师的时间焦虑感研究

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江苏高教 2023年第9期 96-103页

作者：李雨潜江苏警官学院教务处南京210031

全球化竞争时代的高校青年教师存在普遍的时间焦虑问题,社会时间类型学提供了一个能够解释当前学术情境下高校青年教师时间焦虑感生成机制的结构性参考框架。基于这一理论视角该研究发现,弥漫的竞速文化在现代社会加速话语的引导和信息... 详细信息

全球化竞争时代的高校青年教师存在普遍的时间焦虑问题,社会时间类型学提供了一个能够解释当前学术情境下高校青年教师时间焦虑感生成机制的结构性参考框架。基于这一理论视角该研究发现,弥漫的竞速文化在现代社会加速话语的引导和信息技术提供的加速支持下正不断解构传统高校学术职业的时间秩序,使高校青年教师产生永无止境的忙碌与加速的学术职业体验;有形的时间节点带来倒计时压力,无形的目标取向施加“反思性”时间规训力量;竞争逻辑造成信任危机,但在同步偏好驱使下的持续关注与暗中比较催生了高校青年教师的群体性孤独;无法得到满足的时间期望与低效能感使高校青年教师看似时间富余实则自由时间极为匮乏。时间的结构化要求在高校青年教师的自我规训中实现同步,所带来的时间失控感、时间饥荒感充斥于高校青年教师的工作和日常生活,由此催使了高校“青焦”群体的诞生。

关键词：高校青年教师时间焦虑感社会时间类型学

地方师范大学章程的师范性话语分析——基于对21所地方师范大学章程的文本分析

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教育发展研究 2016年第11期36卷 37-45页

作者：李雨潜浙江师范大学田家炳教育科学研究院硕士研究生金华321004

本文选取《2015中国大学评价研究报告》所公布的中国师范大学排行前30名中已正式颁布施行的21所地方师范大学章程的文本作为研究对象,分别选取体现地方师范大学"组织属性、使命责任及大学定位"、"师范生培养目标"及"为地方基础教育服务... 详细信息

本文选取《2015中国大学评价研究报告》所公布的中国师范大学排行前30名中已正式颁布施行的21所地方师范大学章程的文本作为研究对象,分别选取体现地方师范大学"组织属性、使命责任及大学定位"、"师范生培养目标"及"为地方基础教育服务"三组特征词,对样本地方师范大学章程文本的师范性话语进行分析和解读,发现章程文本师范性话语虽然呈现主流性关注,但部分地方师范大学对师范性价值认同度及对师范生及为地方基础教育服务的关注不高,同时也存在办学定位盲目攀高等问题。通过地方师范大学章程之师范性话语分析发现的问题,本文建议地方师范大学的办学治校者在大学章程的修订及大学治理的过程中,必须加强对师范属性使命的认同和坚守,并在此基础上重视师范生的培养及增强为地方基础教育服务的自觉性以突出师范特色。

关键词：大学章程文本分析地方师范大学师范性话语