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Comparison of the Pension System Reform in East Asia and Southeast Asia

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学术界 2015年第7期 269-273页

作者： Yang Yifan chen keyu Faculty of Public Administration Southwest Jiaotong University

This paper introduces the development of the pension system in East Asian and Southeast Asian countries in the backdrop of population aging all over the *** on the historical development and comparison of the present pension systems of different countries in East Asia and Southeastern Asia,this paper proposes the key components and the functions of each component of the pension *** shortcomings of low coverage and benefit and suggestions for the future are also covered in this paper.

关键词：养老保险制度制度改革东亚东南亚国家人口老龄化东南亚地区部分和覆盖率

A novel microwave absorber——BaAl_2Fe_(10)O_(19)/poly(m-toluidine) composite:Preparation and electromagnetic properties

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Science China Chemistry 2012年第7期55卷 1220-1227页

作者： chen keyu XU QingQing LI LiangChao GONG PeiJun chen HaiFeng XIAO QiuShi Xu Feng Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfitce Zhejiang Normal UniversityJinhua 321004China Quzhou College Quzhou 324000China

BaFe10A12O19/poly（m-toluidine）（BFA/PMT） composites were synthesized by in-situ polymerization of m-toluidine in the presence of BaFe10Al2O19 particles. The structure, composition and morphology of the obtained samples were characterized by using XRD, FT-IR, UV-visible spectroscopy, SEM and TEM techniques. Their electrical conductivity, magnetic property and microwave absorbing property were measured by the four-probe meter, the vibrating sample magnetometer and the vector network analyzer, respectively. The results indicated that BFA particles were coated effectively by PMT polymer and some interactions between PMT and BFA particles existing in the composites. The conductivity of BFA/PMT composite is smaller than that of pure polymers and its saturation magnetization is a little smaller than that of pure BFA. The influence of the constitution and film thickness of absorbent on its microwave absorbing property is evident. The microwave absorbing properties of the BFA/PMT composites are better than those of pure BFA and PMT. When optimizing the mass rate of BFA/PMT to 0.3, the absorbent with 2 mm film thickness has the minimum reflection loss of -28.26 dB at approximate 14.24 GHz, and the maximum available bandwidth of 8.8 GHz, respectively. The results show that these composites can be used as advancing absorption and shielding materials due to their favorable microwave absorbing property.

关键词： composites in-situ polymerization microwave absorbing property

Rapid subsurface damage detection of SiC using inductivity coupled plasma

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International Journal of Extreme Manufacturing 2021年第3期3卷 104-114页

作者： Yi Zhang Linfeng Zhang keyu chen Dianzi Liu Dong Lu Hui Deng Department of Mechanical and Energy Engineering Southern University of Science and TechnologyNo.1088Xueyuan RoadShenzhenGuangdong 518055People’s Republic of China School of Engineering Faculty of ScienceUniversity of East AngliaNorwich Research ParkNorwich NR47TJUnited Kingdom

This paper proposes a method for the rapid detection of subsurface damage(SSD)of Si C using atmospheric inductivity coupled *** a plasma etching method operated at ambient pressure with no bias voltage,this method does not introduce any new SSD to the *** diagnosis and simulation are used to optimize the detection *** by an Si C cover,a taper can be etched on the substrate with a high material removal *** laser scanning microscopy and scanning electron microscope are used to analyze the etching results,and scanning transmission electron microscope(STEM)is adopted to confirm the accuracy of this *** STEM result also indicates that etching does not introduce any SSD,and the thoroughly etched surface is a perfectly single crystal.A rapid SSD screening ability is also demonstrated,showing that this method is a promising approach for the rapid detection of SSD.

关键词： silicon carbide subsurface damage SSD detection ICP etching

Fabrication of Z-type barium ferrite/silica composites with enhanced microwave absorption

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Science China(Technological Sciences) 2014年第9期57卷 1858-1864页

作者： SHEN JunHai chen keyu LI LiangChao DING Yan LI JuanBi KONG WeiQiu Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Department of Chemistry Zhejiang Normal University

The Z-type barium ferrite/silica composites(Z-BCF/SiO2)were fabricated by in situ chemical synthesis *** composition,structure,morphology and magnetic behavior of the composites were characterized by chemical analysis,IR,XRD,SEM,TEM and *** results indicated that there were some interactions between two components in the Z-BCF/SiO2 composites due to the coating of SiO2 on the Z-BCF *** magnetic properties of the Z-BCF/SiO2 composites were evidently less than that of the Z-BCF,owing to the small volume fraction of magnetic components in the *** to the good transmission and loss properties on electromagnetic waves,the composites were better at microwave absorption than the parent ***,this research laid a foundation for the fabrication of highly efficient microwave absorbing material with enhanced wave impedance matching.

关键词： barium ferrite silica composites microwave absorption performance

基于BOPPPS教学模式的刺法灸法学实训课程应用

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中国中医药现代远程教育 2025年第2期23卷 21-23页

作者：陈柯宇黄畅王晓彤张峰成都中医药大学针灸推拿学院四川成都610075 北京中医药大学针灸推拿学院北京102401

文章总结整理了刺法灸法学课程传统实训教学的不足之处,并运用BOPPPS教学模式,将引入(Bridge-in,B)、学习目标(Objective,O)、前测(Pre-assessment,P)、参与式学习(Participatory learning,P)、后测(Post-assessment,P)、总结(Summary,S)融入刺法灸法学实训教学中,详细分析了各个环节的具体应用及此模式相比传统实训教学的优势,提出了今后教学改革深入的新方向。此教学模式重点提高了学生的学习积极性和技能操作能力,为针灸推拿学人才培养奠定了基础。

关键词：刺法灸法学 BOPPPS教学模式实训教学

Controlled fabrication and electrical-magnetic properties of Poly(OT-co-AN)/Ba_(0.8)La_(0.2)Al_2Fe_(10)O_(19) composites

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Science China(Technological Sciences) 2012年第1期55卷 6-15页

作者： chen keyu XU QingQing LI LiangChao TONG GuoXiu QIAN HaiSheng XIAO QiuShi XU Feng Department of Chemistry Institute of Physical Chemistry Zhejiang Normal University Jinhua 321004 China

Poly（OT-co-AN）/Ba0.8La0.2Al2Fe10O19 （Poly（OT-co-AN）/BLAF） composites were fabricated by in situ polymerization method. It was investigated that of mass rate of momomer （mor/mAN）, polymeration temperature and time, and feeding ratio of BLAF effect on the structures, morphology, conductivity, magnetic property of composites by the orthogonal optimum design. The results indicated that poly （OT-co-AN） copolymer had a better coating on BLAF particles, and there were some interactions between components in the composites. The magnetic properties of the composites were related to content of the magnetic BLAF particles in it. The feeding ratio of BLAF had a significant influence on constitute and conductivity of the composites, followed by the temperature. The reflection loss and the effective bandwidth of composites for electromagnetic wave were at- tributed to the synergistic effect between poly（OT-co-AN） and BLAF. The poly（OT-co-AN）/BLAF composites with mass ratio of BLAF to mix monomer （moT^mAN =1：1） equal to 5/1 at 10 h in 25~C had a maximum synergistic effect between its compo- nents, showed a maximum reflection loss of -26.94 dB at 14.10 GHz and an available bandwidth of 8.54 GHz. It was sug- gested that the composites can be used as a advancing absorption and shielding materials for electromagnetic wave due to their favorable microwave absorption properties.

关键词： poly(OT-co-AN) copolymer Ba-ferrite conductivity magnetic property reflection loss

Support Vector Regression for Bus Travel Time Prediction Using Wavelet Transform

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Journal of Harbin Institute of Technology(New Series) 2019年第3期26卷 26-34页

作者： Yang Liu Yanjie Ji keyu chen Xinyi Qi School of Transportation Southeast University Nanjing 210096 China Guangzhou Urban Planning & Design Survey Research Institute Guangzhou 510060 China

In order to accurately predict bus travel time, a hybrid model based on combining wavelet transform technique with support vector regression(WT-SVR) model is employed. In this model, wavelet decomposition is used to extract important information of data at different levels and enhances the forecasting ability of the model. After wavelet transform different components are forecasted by their corresponding SVR predictors. The final prediction result is obtained by the summation of the predicted results for each component. The proposed hybrid model is examined by the data of bus route No.550 in Nanjing, China. The performance of WT-SVR model is evaluated by mean absolute error(MAE), mean absolute percent error(MAPE) and relative mean square error(RMSE), and also compared to regular SVR and ANN models. The results show that the prediction method based on wavelet transform and SVR has better tracking ability and dynamic behavior than regular SVR and ANN models. The forecasting performance is remarkably improved to obtain within 6% MAPE for testing section Ⅰ and 8% MAPE for testing section Ⅱ, which proves that the suggested approach is feasible and applicable in bus travel time prediction.

关键词： intelligent transportation bus travel time prediction wavelet transform support vector regression hybrid model

State-target strategy:a bridge for the integration of Chinese and Western Medicine

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Journal of Traditional Chinese Medicine 2021年第1期41卷 1-5页

作者： GOU Xiaowen GAO Zezheng YANG Yingying LI Qingwei TONG Xiaolin chen keyu LEI Ye SONG Bin ZHAO Linhua Department of Endocrinology Guang'anmen HospitalChina Academy of Chinese Medical SciencesBeijing 10054China Graduate School Beijing University of CMnese MedicineBeijing 100029China Department of Endocrinology and Metablism the Second Affiliated Hospital of Shaanxi University of Traditional Chinese MedicineXianyang 712021China The Third Affiliated Hospital of Zunyi Medical University The First People's Hospital of Zunyi CityZunyi 563002China Molecular Biology Laboratory Guang'anmen HospitalChinese Academy of Traditional Chinese MedicineBeijing 10054China

The methods of Traditional Chinese Medicine(TCM)’s diagnosis and treatment have undergone several *** is crucial to build a proper model which is capable to modernize TCM into a both standardized and individualized *** xiao-lin proposed the state-target strategy to build a bridge for the integration of Chinese and Western *** is a model based on modern medical disease concepts and using the method of TCM to balance the pathological states and adopting the achievements of pharmacology of Chinese medicine to focus on the disease targets,symptom targets,and biochemical indicator *** reconstruction of TCM diagnosis and treatment system for diabetes is a good example to demonstrate this *** could improve the clinical efficacy,support the scientific research,and reinforce the standardization of TCM.

关键词： Medicine,Chinese traditional syndrome differentiation treatment integrative medicine review state-target strategy

Large Curvature Folding Strategies of Butterfly Proboscis

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Journal of Bionic Engineering 2020年第6期17卷 1239-1250页

作者： Daobing chen Honglie Song Qingping Liu Jie Gan Yang Liu keyu Che' Chong Wang Shifeng Wen Yan Zhou Chunze Yan Junqiu Zhang Yusheng Shi Zhiwu Han State Key Laboratory of Material Processing and Die&Mould Technology Huazhong University of Science and TechnologyWuhan 430074China The Key Laboratory of Bionic Engineering(Ministry of Education) Jilin UniversityChangchun 130022China Applied Mechanics Laboratory Deparment of Engineering MechanicsTsinghua UniversityBeijing 100083China Faculty of Engineering China University of GeosciencesWuhan 430074China

Due to its real-time control,high folding ratio,and structure self-locking,flexible large curvature self-folding devices have broad application prospects,such as foldable human implants,flexible electronics,and flexible *** by this background,flexible large curvature folding butterfly(Polyura eudamippus)proboscises were studied in this *** folding ratio of the proboscises was about *** curvature of coiled proboscises ranged from about 150 m_1 to 880 m The external and internal structures of the proboscises were studied by different *** main strategies for large-curvature folding of proboscises were identified:a gradual decrease in thickness,a lower elastic modulus,and(most importantly)large numbers of regular corrugated cracks arranged on the *** corrugated cracks can effectively accommodate the coiled strain and provide space for the large curvature folding of ***,a 4D printed coiled sample with corrugated cracks was fabricated to mimic the proboscises stretching ***-curvature folding strategies,based on these proboscises,provide insights for the biomimetic design of artificial highly folded components.

关键词： butterfly proboscis large curvature folding corrugated crack 4D printing bionic