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TWO-SCALE CURVED ELEMENT METHOD FOR ELLIPTIC PROBLEMS WITH SMALL PERIODIC COEFFICIENTS

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Journal of Computational Mathematics 2002年第4期20卷 381-390页

作者： Jin-ru chen Jun-zhi Cui School of Mathematics and Computer Sciences Nanjing Normal UniversityNanjing 210097China LSEC ICMSECAcademy of Mathematics and System SciencesChinese Academy of SciencesBeijing 100080China

This paper is concerned with the second order elliptic problems with small periodic coefficients on a bounded domain with a curved boundary. A two-scale curved element method which couples linear elements and isoparametric elements is proposed. The error estimate is obtained over the given smooth domain. Furthermore an additive Schwarz method is provided for the isoparametric element method.

关键词： two-scale curred element small periodic coefficients

TWO-SCALE FEM FOR ELLIPTIC MIXED BOUNDARY VALUE PROBLEMS WITH SMALL PERIODIC COEFFICIENTS

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Journal of Computational Mathematics 2001年第5期19卷 549-560页

作者： Jin-ru chen Jun-zhi Cui School of Mathematics and Computer Sciences Nanjing Normal UniversityNanjing 210097China ICMSEC Academy of Mathematics and Systems SciencesChinese Academy of SciencesBeijing 100080China

Presents a study which proposed a dual approximate expression of the exact solution for mixed boundary value problems of second order elliptic partial differential equation with small periodic coefficients. Dual appro... 详细信息

关键词： two-scale FEM mixed boundary value small periodic coefficients

Asymptotic Properties of the Maximum Likelihood Estimate in Generalized Linear Models with Stochastic Regressors

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Acta Mathematica Sinica,English Series 2006年第6期22卷 1679-1686页

作者： Jie Li DING Xi ru chen School of Mathematics and Statistics Wuhan University Wuhan 430072 P. R. China Graduate School Chinese Academy of Sciences Beijing 100039 P. R. China

For generalized linear models （GLM）, in case the regressors are stochastic and have different distributions, the asymptotic properties of the maximum likelihood estimate （MLE） β^n of the parameters are studied. U... 详细信息

关键词： Generalized linear models Consistency Asymptotic normality

Synthesis of Novel Chiral Diol Ligands for the Enantioselective Reactions

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Chinese Chemical Letters 2001年第6期12卷 489-490页

作者： Ming Xia LI Yan Ming WANG ru ru chen Research Institute of Elemento-Organic Chemistry Nankai UniversityTianjin 300071 Pittsburgh University Medical Center PittsburghPA 15213U.S.A

A series of novel enantiomerically pure diols were synthesized from D-erythorbic acid in three steps, and the absolute configuration of one of them 4a has been confirmed by X-ray analysis.

关键词： Enantiomerically pure chiral diol ligands X-ray analysis

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岭南传统建筑元素在灯具设计中的应用研究

肇庆学院学报 2025年第1期46卷 48-53页

作者：陈茹李小军黄健恒肇庆学院美术学院、设计学院广东肇庆526061

将岭南传统建筑元素与现代灯具设计相结合,实现文化传承与创新,提升灯具艺术价值,丰富灯具文化内涵。结合岭南传统建筑造型、纹样及工艺特点,设计出集美观、实用、环保于一体的灯具产品,以促进传统工艺的复兴,推动当地相关产业经济发展... 详细信息

将岭南传统建筑元素与现代灯具设计相结合,实现文化传承与创新,提升灯具艺术价值,丰富灯具文化内涵。结合岭南传统建筑造型、纹样及工艺特点,设计出集美观、实用、环保于一体的灯具产品,以促进传统工艺的复兴,推动当地相关产业经济发展,丰富市场产品多样性。通过文献调研、现场考察、原型设计、功能测试、美学评价和多学科交叉等多种方法,探索岭南传统建筑元素在灯具设计应用中的可能性。结合现代设计方法在新材料运用、加工工艺、数字化与智能化技术上实现灯具创新设计,展现岭南传统文化的独特魅力。融入岭南传统建筑元素的灯具设计兼具装饰性和功能性,更容易被消费者接纳。将岭南传统建筑元素融入灯具设计,有助于提升灯具的文化价值和市场竞争力,促进传统文化产业的转型升级。

关键词：岭南传统建筑元素灯具设计文化产品创新

A Novel Indoor Positioning Framework

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Computer Modeling in Engineering & Sciences 2022年第3期130卷 1459-1477页

作者： Ming-Chih chen Yin-Ting cheng ru-Wei chen Department of Electronic Engineering National Kaohsiung University of Science and Technology(First Campus)Kaohsiung City82445Taiwan

Current positioning systems are primarily based on the Global Positioning System(GPS).Although the GPS is accurate within 10 m,it is mainly used for outdoor positioning services(Location-Based Service;LBS).However,since satellite signals cannot penetrate buildings,indoor positioning has always been a blind spot for satellite *** indoor positioning applications are extensive with high commercial values,they have created a competitive niche in *** indoor positioning technologies are unable to achieve less than 10 cmaccuracy except for the UltraWide Band(UWB)*** the other hand,the Bluetooth protocol achieves an accuracy of 1 to *** this work,we use Bluetooth wireless signals to build a novel indoor positioning framework to avoid the high manufacturing costs involved in the UWB *** Bluetooth signals are combined with the results from artificial intelligence algorithms to improve *** laboratory indoor location tracking,the accuracy rate is 96%,which provides effective indoor tracking for the movement of people.

关键词： Indoor positioning Bluetooth protocol artificial intelligence

Improve the Accuracy of Fall Detection Based on Artificial Intelligence Algorithm

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Computer Modeling in Engineering & Sciences 2021年第9期128卷 1103-1119页

作者： Ming-Chih chen Yin-Ting cheng ru-Wei chen Department of Electronic Engineering National Kaohsiung University of Science and Technology(First Campus)Kaohsiung City82445Taiwan

This work presents a fall detection system based on artificial *** system incorporates miniature wearable devices for fall *** detection is achieved by integrating a three-axis gyroscope and a threeaxis *** system gathers the differential data collected by the gyroscope and accelerometer,applies artificial intelligence algorithms for model training and constructs an effective model for fall *** provide easywearing and effective position detection,it is designed as a small device attached to the user’*** results have shown that the accuracy of the proposed fall detection model is up to 98%,demonstrating the effectiveness of the model in real-life fall detection.

关键词： Artificial intelligence fall detection miniature sensing device

Selective Acid Hydrolysis Condition for the Composition and Linkage with a Fructofuranosyl Backbone of a Polysaccharide from Angelica sinensis (Oliv) Diels

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Chinese Chemical Letters 2006年第10期17卷 1369-1372页

作者： Gui Yun XU Yang chen ru Xian chen Institute of Chemistry Chinese Academy of Sciences Beijing 100080 Institute of Medicinal Biotechnology Chinese Academy of Medical Sciences Beijing 100050

A new polysaccharide was extracted and purified from the roots of Angelica sinensis （Oliv） Diels （ASD）. Its composition and linkage was elucidated by selective hydrolysis and GC/MS analysis of its derivatives. The polysaccharide was made of → 1） Fruf（2→and→6） Glcp （l→as its backbone with highly branched structure. To our best knowledge, this is the first report of the fructose residue in polysaccharides from the roots of the ASD.

关键词： Selective hydrolysis fructofuranosyl backbone GC/MS

Recent advances in defect electrocatalysts: Preparation and characterization

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Journal of Energy Chemistry 2021年第2期30卷 208-225,I0008页

作者： Zhaohui Xiao Chao Xie Yanyong Wang ru chen Shuangyin Wang State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082HunanChina

the types and strategies used to prepare defect electrocatalysts will continue to be studied and developed as new defective materials are generated.4. Characterization of defectsThis review briefly summarizes recent progress in defect electrocatalysts, and the synthesis strategies and characterization techniques for defects are systematically discussed. Although challenges in the characterization of defect structures in the electrocatalytic reaction process remain, the dynamic evolution of defect sites is predicted to be helpful for designing and preparing high-performance electrocatalysts for commercial applications. Furthermore, due to an insufficient understanding of the defect-structureproperty relationships, future possibilities for the reasonable design of defect electrocatalysts to obtain desirable performance are suggested.

关键词： Defect Electrocatalysts Vacancies Heteroatom doping