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Reimagining local worlds:Wen village conservation and regeneration by Amateur Architecture Studio

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Built Heritage 2023年第4期7卷 110-126页

作者： xiang ren School of Architecture The University of Sheffield13F The Arts TowerSheffieldS102TNUK

This article theorises the local world as a conceptual scaffold for future conservation and *** aims to catalyse a theoretical dialogue across the East and West to understand how ordinary places and lifeworlds are preserved,reproduced,and possibly *** local worlds discussed herein are conceptualised as the worlds of many,the worlds of relating,the worlds of structuring and the worlds of *** four cardinal points present a source of open-endedness and futurity for contemporary architectural *** current article examines the characterisation of the Wen village conservation and regeneration project,led by the Amateur Architecture Studio in Zhejiang Province of China(2012–2016),as an architectural reimagination of local worlds,with a strong sensitivity to the ordinary places and lifeworlds of rural China and juxtapositions of new local worlds within old *** piecing together the flows and fragments of the architectural process,this article shows how locally situated designs and dynamics have shaped the project in both its formation and afterlife,both ethically and *** close readings of popular and oral accounts from both architect’s and users’perspectives,this article extends the case study by broadening theoretical conversations about contemporary architecture’s capacity to reimagine local worlds.

关键词： local worlds rural China ordinary places and lifeworlds Wen village conservation and regeneration Amateur Architecture Studio

Output Feedback Stabilization of an Unstable Wave Equation with Observations Subject to Time Delay

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Journal of Systems Science & Complexity 2016年第1期29卷 99-118页

作者： YANG Kunyi ren xiang ZHANG Jie College of Science North China University of Technology

This paper focuses on boundary stabilization of a one-dimensional wave equation with an unstable boundary condition,in which observations are subject to arbitrary fixed time *** observability inequality indicates that the open-loop system is observable,based on which the observer and predictor are designed:The state of system is estimated with available observation and then predicted without *** that equivalently the authors transform the original system to the well-posed and exponentially stable system by backstepping *** equivalent system together with the design of observer and predictor give the estimated output *** is shown that the closed-loop system is exponentially *** simulations are presented to illustrate the effect of the stabilizing controller.

关键词： Exponential stability observability inequality output feedback unstable boundary condition time delay wave equation

Fault Diagnosis of Power Transformers Using Graph Convolutional Network

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CSEE Journal of Power and Energy Systems 2021年第2期7卷 241-249页

作者： Wenlong Liao Dechang Yang Yusen Wang xiang ren Department of Energy Technology Aalborg UniversityAalborg 9220Denmark College of Information and Electrical Engineering China Agricultural UniversityBeijing 100083China School of Electrical Engineering and Computer Science KTH Royal Institute of Technology-StockholmSE-10044Sweden North China Electric Power Research Institute Co. Ltd.Beijing 100045China

Existing methods for transformer fault diagnosis either train a classifier to fit the relationship between dissolved gas and fault type or find some similar cases with unknown samples by calculating the similarity *** accuracy is limited,since they are hard to learn from other algorithms to improve their own *** improve the accuracy of transformer fault diagnosis,a novel method for transformer fault diagnosis based on graph convolutional network(GCN)is *** proposed method has the advantages of two kinds of existing ***,the adjacency matrix of GCN is utilized to fully represent the similarity metrics between unknown samples and labeled ***,the graph convolutional layers with strong feature extraction ability are used as a classifier to find the complex nonlinear relationship between dissolved gas and fault *** back propagation algorithm is used to complete the training process of *** simulation results show that the performance of GCN is better than that of the existing methods such as convolutional neural network,multi-layer perceptron,support vector machine,extreme gradient boosting tree,k-nearest neighbors and Siamese network in different input features and data volumes,which can effectively meet the needs of diagnostic accuracy.

关键词： Power transformer fault diagnosis graph convolutional network similarity metrics

Texture Repairing by Unified Low Rank Optimization

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Journal of Computer Science & Technology 2016年第3期31卷 525-546页

作者： Xiao Liang xiang ren Zhengdong Zhang Yi Ma Institute for Advanced Study Tsinghua University Beijing 100086 China Department of Computer Science University of Illinois at Urbana-Champaign Urbana IL 61801 U.S.A. Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA 02139 U.S.A. School of Information Science and Technology ShanghaiTech University Shanghai 200031 China

In this paper, we show how to harness both low-rank and sparse structures in regular or near-regular textures for image completion. Our method is based on a unified formulation for both random and contiguous corruption. In addition to the low rank property of texture, the algorithm also uses the sparse assumption of the natural image： because the natural image is pieeewise smooth, it is sparse in certain transformed domain （such as Fourier or wavelet transform）. We combine low-rank and sparsity properties of the texture image together in the proposed algorithm. Our algorithm based on convex optimization can automatically and correctly repair the global structure of a corrupted texture, even without precise information about the regions to be completed. This algorithm integrates texture rectification and repairing into one optimization problem. Through extensive simulations, we show our method can complete and repair textures corrupted by errors with both random and contiguous supports better than existing low-rank matrix recovery methods. Our method demonstrates significant advantage over local patch based texture synthesis techniques in dealing with large corruption, non-uniform texture, and large perspective deformation.

关键词： low-rank texture convex optimization sparse error correction image repairing

Bioactive Alkaloids from Indole-3-carbinol Exposed Culture of Daldinia eschscholzii

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Chinese Journal of Chemistry 2018年第8期36卷 749-753页

作者： Li Ping Lina ren xiang Tan State Key Laboratory Cultivation Base for TCM Quality and Efficacy Nanjing University of Chinese Medicine Nanjing Jiangsu 210023 China Institute of Functional Biomolecules State Key Laboratory of Pharmaceutical Biotechnology Nanjing University Nanjing Jiangsu 210023 China

Two new and rare bioactive indoles named dalesindoloids A （1） and B （3）, along with 3-（1H-indole-3ylmethyl）-2-oxindole （2）, were characterized from the indole-3-carbinot （13C）-exposed culture of Daldinia eschscholzii. The absolute configuration of 2 was determined by quantum chemical calculations of the electronic circular dichroism （ECD） spectrum. Dalesindoloids A and B were cytotoxic against the leukemia HL-60 cell line with the IC50 values of 1.0 and 7.4 μmol/L, respectively, with the former being inhibitory on Staphylococcus aureus （MIC： 9.1 μmol/L）. The simultaneous characterization of the alkaloids from the 13C-exposed fungal culture highlighted that the 2,3-epoxyindoline motif can be transformed into both lactam and indolin-3-one moieties. This is the first-time description of the 2,3-epoxyindoline chemical versatility and Wagner-Meerwein rearrangement （WMR） reaction in the microbial culture.

关键词： indole alkaloids indole-3-carbinol Daldinia eschscholzii anticancer antibacterial

Surfel-based surface modeling for robotic belt grinding simulation

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第7期7卷 1215-1224页

作者： ren xiang-yang MUELLER Heinrich KUHLENKOETTER Bernd Robotics Research Institute University of Dortmund Dortmund 44227 Germany Informatik VII University of Dortmund Dortmund 44227 Germany

The new flee-form surface modelling technology for robotic belt grinding simulation presented in this paper is based on discrete surfel elements generated from the surface approximation point set and can facilitate the simulation implementation. A local process model exploits the advantage of surfel representation to compute the material removal rate and the final surface grinding error can be easily carried out. With the help of this system, robot programmers can improve the path planning and predict potential problems by visualizing the manufacturing process.

关键词： Surface modelling Surfel Belt-grinding simulation

Synthesis of a Novel Diamine 4-[(4'-Butoxyphenoxy)carbonyl]phenyl-3",5"-diaminobenzoate and Corresponding Polyimides

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Chinese Chemical Letters 2006年第11期17卷 1511-1514页

作者： Li Gang ren xiang Yang LIU Yi GU State Key Laboratory of Polymeric Materials Engineering College of Polymer Science and Engineering Sichuan University Chengdu 610065

A novel diamine 4-[（4＇-butoxyphenoxy）carbonyl]phenyl-3＂,5＂-diaminobenzoate （BCDA） was synthesized from 4-butoxyphenol, 4-hydroxybenzoic acid and 3,5-dinitrobenzoic acid through four main intermediates, and a series of polyimides were also synthesized. All the intermediates and the final product were characterized by FTIR and 1H-NMR. The key step in synthesis route is selective hydrolyzation of two ester groups in 4-butoxyphenyl-4＇-acetoxybenzoate, by adjusting the reaction temperature and the concentration of ammonia, shorteding the reaction time. The properties of the novel polyimides, such as the aggregation structures, glass transition temperature, solubility and the pretilt angles, were carded out.

关键词： Synthesis polyimides side chain alignment film.

DBU-Mediated Carboxylative Coupling of Primary Amines,Carbon Dioxide and Propargyl Chlorides

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Chinese Journal of Chemistry 2015年第5期33卷 610-613页

作者： Wen-Zhen Zhang xiang ren Xiao-Bing Lu State Key Laboratory of Fine Chemicals Dalian University of TechnologyDalianLiaoning 116024China

A carboxylative coupling reaction of various primary amine and 3-phenyl-2-propynyl or 2-nonynyl chloride in the presence of 8-diazabicyclo[5.4.0]undec-7-ene(DBU)using carbon dioxide as carboxylative reagent was *** transition-metal free reaction system shows broad substrate scope and gives a series of propargylcarbamates in moderate to good *** obtained N-alkyl substituted carbamate product can undergo base-catalyzed intramolecular cyclization reaction to afford functionalized 4-methylene-2-oxazolidinone in good yield.

关键词： carbon dioxide fixation amines propargylchlorides carboxylative coupling transition-metal free

Characteristics of Mechanical Properties and Microstructure for 316L Austenitic Stainless Steel

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Journal of Iron and Steel Research International 2011年第11期18卷 53-59页

作者： SONG ren-bo xiang Jian-ying HOU Dong-po School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

A comparative study on mechanical properties and microstructure of 316L austenitic stainless steel between solution treated specimen and hot rolled specimen was conducted. After a specimen was subjected to solution treatment at 1 050 ℃ for 6 min, its mechanical properties were determined through tensile and hardness tests. Based on the true stress vs true strain and engineering stress vs engineering strain flow curves, the work hardening rate has been explored. The results show that the solution treated specimen has an excellent combination of strength and elongation, and that this steel is easy to work-hardening during deformation. Optical microscope, scanning electron micro- scope, transmission electron microscope and X-ray diffraction examinations were conducted, these reveal that twins in 316L austenitic stainless steel can be divided into suspended twin and transgranular twin which have different for mation mechanisms in growth, and that the deformation induced martensite nucleated and grown in the shear band intersections can be observed, and that the fracture surfaces are mainly composed of dimples and exhibit a tough fracture character.

关键词： 316L mechanical property twin martensite fracture morphology