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环糊精/蒙脱石基复合凝胶的制备与性能研究

功能材料 2017年第3期48卷 3208-3213,3217页

作者：陈其皓胡娜施冬健操莹李雅瑜钮德宇陈明清江南大学化学与材料工程学院江苏无锡214122 江阴职业技术学院化学与纺织工程系江苏江阴214405

选用聚乙二醇为原料,以环糊精为交联剂和硅烷偶联剂改性的蒙脱石为增强材料制备聚乙二醇/环糊精/蒙脱石(PEG/CD/MMT)复合凝胶。通过傅里叶转换红外光谱(FTIR)和X射线衍射(XRD)对凝胶的结构进行表征;用热失重(TGA)分析复合凝胶内各组分... 详细信息

选用聚乙二醇为原料,以环糊精为交联剂和硅烷偶联剂改性的蒙脱石为增强材料制备聚乙二醇/环糊精/蒙脱石(PEG/CD/MMT)复合凝胶。通过傅里叶转换红外光谱(FTIR)和X射线衍射(XRD)对凝胶的结构进行表征;用热失重(TGA)分析复合凝胶内各组分含量以及凝胶的分解温度;通过拉伸、压缩以及流变检测凝胶的力学性能;实验结果表明,凝胶改性前后,其承受最大载荷时的应力提升了至少3倍;凝胶中加入蒙脱石后,复合凝胶材料的力学性能较为优异。原子吸收分光光度计(AAS)和紫外-可见光分光光度计(UV-Vis)测试结果显示复合凝胶对金属和有机物芳香族化合物有较好的吸附性能。这种复合凝胶可在污水处理方面有很好的应用前景。

关键词：环糊精蒙脱石凝胶吸附机械性能

基于HAZOP-LOPA分析方法的乙炔脱水工艺危险性分析

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安全 2022年第2期43卷 42-46页

作者：王淑祺施琦皓毕馨予郑琰沈阳化工大学环境与安全工程学院辽宁沈阳110142

为提高乙炔脱水工艺的安全性,本文采用HAZOP与LOPA结合的方法对乙炔脱水工艺的气液分离单元进行危险性分析。由HAZOP定性分析得到流程中分离罐V-202存在较大危险性,通过LOPA定量分析得到分离罐V-202危险发生的概率为2.5×10^(-4),风险... 详细信息

为提高乙炔脱水工艺的安全性,本文采用HAZOP与LOPA结合的方法对乙炔脱水工艺的气液分离单元进行危险性分析。由HAZOP定性分析得到流程中分离罐V-202存在较大危险性,通过LOPA定量分析得到分离罐V-202危险发生的概率为2.5×10^(-4),风险等级为高;针对分析结果提出在分离罐V-202处增设独立的压力变送器、开关阀和压力报警装置,在气相出口管道处增设独立的压力变送器及开关阀的预防措施,将危险发生的概率降低至2.5×10^(-7),风险等级降为低。结果表明:HAZOP-LOPA分析方法对乙炔脱水工艺危险性评价具有可行性,能够有效保障乙炔脱水工艺的生产安全。

关键词： HAZOP LOPA 危险性评价乙炔脱水工艺

Neuropsychological features in post-stroke cognitive impairment with no dementia patients with different Traditional Chinese Medicine syndromes

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Journal of Traditional Chinese Medicine 2019年第1期39卷 97-102页

作者： Ma Jie Wang Yu Zhang Yunyun Guo qihao Zhen Xiaomin shi Moyi Department of Neurology Yueyang Hospital of Integrated Traditional Chinese and Western MedicineShanghai University of Traditional Chinese MedicineShanghai 200437China Department of Gerontology Shanghai Jiaotong University Affiliated Sixth People's HospitalShanghai 200233China Internal Medicine of Traditional Chinese Medicine Yueyang Hospital of Integrated Traditional Chinese and Western MedicineShanghai University of Traditional Chinese MedicineShanghai 200437China

OBJECTIVE: To investigate neuropsychological features of post-stroke cognitive impairment with no dementia(PSCIND) patients with different Traditional Chinese Medicine(TCM) ***: We recruited 50 patients with PSCIND between April 2012 and March 2013. Patients were divided into different groups according to TCM classifications. Patients were assessed using neuropsychological tests, including cognitive screening(mini-mental state examination), memory testing (auditory verbal learning test), executive/attention[shape trails test, stroop color-word test(SCWT),reading the mind in the eyes test, the digit ordering test-A(DOT-A), and symbol digit modalities test], language(action naming test, Boston naming test, famous face test, similarity test, and verbal fluency test), and visuospatial functioning [complex figure test(CFT)].RESULTS: We found no significant differences between patients with and without a diagnosis of turbid phlegm blocking the upper orifices on neuropsychological test performance. Patients diagnosed with upper hyperactivity of liver Yang syndrome scored significantly lower on the SCWT-C executive test and the CFT-delayed recall memory test. Patients with excess syndrome scored significantly lower on the SCWT-C executive test, and significantly higher on the DOT-A executive ***: Neuropsychological characteristics differ between PSCIND patients with different TCM classifications.

关键词： Cognitive dysfunction Stroke Syndromes and signs Neuropsychological tests

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海洋用液压转盘马达转速同步控制系统研究

石油矿场机械 2021年第6期50卷 13-20页

作者：时琦昊乔长奎魏孔财陈宁生宋志龙兰州兰石石油装备工程股份有限公司兰州730314 川庆钻探长庆钻井总公司西安710021 中国石油和石油化工设备工业协会北京100825

针对海洋用液压转盘中4个马达的转速存在不同步的问题,设计了转盘液压控制系统。运用数学分析的方法,构建了数学模型,并进行了稳定性分析。根据分析结果,设计了自整定模糊PID控制器,采用Matlab/Simulink软件,仿真分析马达同步控制系统... 详细信息

针对海洋用液压转盘中4个马达的转速存在不同步的问题,设计了转盘液压控制系统。运用数学分析的方法,构建了数学模型,并进行了稳定性分析。根据分析结果,设计了自整定模糊PID控制器,采用Matlab/Simulink软件,仿真分析马达同步控制系统。仿真结果表明:在马达同步控制系统中,所设计的控制器控制效果明显,系统稳定性提高明显,动态响应速度得到加快,对于转盘复杂的外负载环境,适应性好,鲁棒性强。

关键词：液压转盘比例阀控马达 PID控制模糊PID控制 Matlab/Simulink

Enhanced thermoelectric properties of hydrothermally synthesized n-type Se&Lu-codoped Bi2Te3

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Journal of Advanced Ceramics 2020年第4期9卷 424-431页

作者： Xiaolei shi Xin Ai qihao Zhang Xiaofang Lu shijia Gu Li Su Lianjun Wang Wan Jiang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai201620China College of Information Science and Technology Donghua UniversityShanghai201620China State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100049China Institute of Functional Materials Donghua UniversityShanghai201620China Engineering Research Center of Advanced Glasses Manufacturing Technology Ministry of EducationShanghai201620China

N-type Se&Lu-codoped Bi2Te3 nanopowders were prepared by hydrothermal method and sintered by spark plasma sintering technology to form dense *** further doping Se element into Lu-doped Bi2Te3 samples,the thickness of the nanosheets has the tendency to become *** electrical conductivity of Lu0.1Bi1.9Te3−xSex material is reduced with the increasing Se content due to the reduced carrier concentration,while the Seeback coefficient values are *** lattice thermal conductivity of the Lu0.1Bi1.9Te3−xSex is greatly reduced due to the introduced point defects and atomic mass ***,the Lu0.1Bi1.9Te2.7Se0.3 sample obtained a maximum ZT value of 0.85 at 420 *** study provides a low-cost and simple low-temperature method to mass production of Se&Lu-codoped Bi2Te3 with high thermoelectric performance for practical applications.

关键词： thermoelectric material n-type bismuth telluride hydrothermal synthesis co-doping

Superior performance and high service stability for Ge Te-based thermoelectric compounds

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National Science Review 2019年第5期6卷 944-954页

作者： Tong Xing Qingfeng Song Pengfei Qiu qihao Zhang Xugui Xia Jincheng Liao Ruiheng Liu Hui Huang Jiong Yang Shengqiang Bai Dudi Ren Xun shi Lidong Chen State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Materials Genome Institute Shanghai University

GeTe-based compounds have been intensively studied recently due to their superior thermoelectric performance, but their real applications are still limited so far due to the drastic volume variation that occurs during the rhombohedral–cubic phase transition, which may break the material or the material/electrode interface during ***, superior performance and high service stability for GeTe-based thermoelectric compounds are achieved by co-doping Mg and Sb into *** linear coefficient of thermal expansion before phase transition is greatly improved to match that after phase transition, yielding smooth volume variation around the phase transition ***, co-doping(Mg, Sb) in GeTe successfully tunes the carrier concentration to the optimal range and effectively suppresses the lattice thermal conductivity.A peak z T of 1.84 at 800 K and an average z T of 1.2 in 300–800 K have been achieved in ***, a Ni/Ti/Ge0.85Mg0.05Sb0.1Te thermoelectric uni-leg is fabricated and tested, showing quite good service stability even after 450 thermal cycles between 473 K and 800 *** study will accelerate the application of GeTe-based compounds for power generation in the mid-temperature range.

关键词： thermoelectrics phase transition thermal expansion service stability power generation application

从两极到三强:欧盟人工智能的全球竞争战略分析

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中国科技论坛 2022年第6期 179-188页

作者：施雯缪其浩上海图书馆(上海科学技术情报研究所) 上海200031

人工智能已经成为当今国际竞争的关键领域,分析人工智能的发展态势和大国战略对赢得这场竞争至关重要。本文旨在研究该领域中普遍认为的美中两极格局将如何以及为何会走向美中欧三强的局面,运用文本分析法梳理欧盟人工智能“以人为中心... 详细信息

人工智能已经成为当今国际竞争的关键领域,分析人工智能的发展态势和大国战略对赢得这场竞争至关重要。本文旨在研究该领域中普遍认为的美中两极格局将如何以及为何会走向美中欧三强的局面,运用文本分析法梳理欧盟人工智能“以人为中心”的人工智能竞争战略的实施意图、举措与前景,并从其主要竞争对手美国的相关反应评估其战略效果,推断战略中存在的薄弱环节与风险。研究发现:欧盟以伦理监管的先发优势实施“遏制型”战略参与竞争,令其在实现主导全球人工智能监管标准方面取得阶段性成功。本文基于欧盟研究,为中国人工智能竞争战略的制定与实施提供建言。

关键词：人工智能伦理监管国家竞争欧盟

High-performance bulk thermoelectric materials and devices

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Science Foundation in China 2016年第4期24卷 67-80页

作者： QIN YuTing ZHANG qihao QIU PengFei BAI ShengQiang shi Xun CHEN LiDong State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of Sciences CAS Key Laboratory of Materials for Energy Conversion Shanghai Institute of CeramicsChinese Academy of Sciences University of Chinese Academy of Sciences

Thermoelectric technology has intrigued wide-spread interests with a direct conversion between electricity and *** study on thermoelectric materials ultimately comes down to improving electrical properties and reducing lattice thermal conductivity,thus leading to a considerable thermoelectric figure of merit(zT).In this paper,we summarize our recent progress in skutterudites,diamond-like compounds,liquid-like materials,thermoelectric critical phenomena and mosaic crystals,and thermoelectric *** significant improvement in thermoelectric materials and devices greatly promotes thermoelectric technology as an important role in future energy solution.

关键词： Thermoelectricmaterials Pseudocubicstructure Phononliquidelectroncrystal Criticalphe nomenon Mosaiccrystal Thermoelectricdevices

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飞机雷电耦合机理及屏蔽性能影响因素分析

系统工程与电子技术 2023年第4期45卷 991-999页

作者：杨占刚张起浩柯中澍石旭东中国民航大学电子信息与自动化学院天津300300

复合材料飞机的雷电间接效应防护是现代飞机亟需解决的难点问题之一。通过建立等效电路研究雷电对飞机的不同电磁耦合机理,分析复合材料飞机在蒙皮敷设金属网的屏蔽性能及影响因素,并通过对比实际情况,验证所提金属网体积计算方法的有... 详细信息

复合材料飞机的雷电间接效应防护是现代飞机亟需解决的难点问题之一。通过建立等效电路研究雷电对飞机的不同电磁耦合机理,分析复合材料飞机在蒙皮敷设金属网的屏蔽性能及影响因素,并通过对比实际情况,验证所提金属网体积计算方法的有效性。理论分析与仿真计算结果表明,在蒙皮表面敷设金属网可为复合材料飞机提供有效雷电防护,且金属网参数对屏蔽性能影响较大。此外,提出的金属网体积及感应电流计算方法,可为复合材料飞机雷电间接效应屏蔽性能的进一步优化提供参考。

关键词：复合材料飞机雷电间接效应电磁屏蔽防雷保护金属网

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