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基于空间特点的老旧居民小区同功能区域重划分研究

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山西建筑 2025年第1期51卷 38-40,54页

作者：张芸安顺市棚户区改造服务中心贵州安顺561099

老旧小区的居住环境可能因年久失修而变得陈旧和不安全,重划分研究有助于改善小区的绿化、照明、交通等基础设施,提升居民的居住舒适度和安全感。为此,该研究分析了老旧居民小区空间特点,基于此,以空气质量、噪声水平、交通便利性、绿... 详细信息

老旧小区的居住环境可能因年久失修而变得陈旧和不安全,重划分研究有助于改善小区的绿化、照明、交通等基础设施,提升居民的居住舒适度和安全感。为此,该研究分析了老旧居民小区空间特点,基于此,以空气质量、噪声水平、交通便利性、绿化覆盖率为目标函数,结合目标权重,构建老旧居民小区同功能区域重划分模型。引入免疫机制改进免疫粒子群算法,求解该模型。实例分析结果显示:研究方法应用后同功能区域利用率明显升高。该方法能够充分利用小区现有的空间资源,通过合理布局和功能整合,提高空间利用率,减少资源浪费。

关键词：空间特点老旧居民小区同功能区域改进免疫粒子群算法重划分

Value Iteration-Based Cooperative Adaptive Optimal Control for Multi-Player Differential Games With Incomplete Information

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IEEE/CAA Journal of Automatica Sinica 2024年第3期11卷 690-697页

作者： yun zhang Lulu zhang yunze Cai the Department of Automation Shanghai Jiao Tong UniversityShanghai 200240 the Key Laboratory of System Control and Information Processing Ministry of Education of ChinaShanghai 200240China

This paper presents a novel cooperative value iteration(VI)-based adaptive dynamic programming method for multi-player differential game models with a convergence *** players are divided into two groups in the learning process and adapt their policies *** method removes the dependence of admissible initial policies,which is one of the main drawbacks of the PI-based ***,this algorithm enables the players to adapt their control policies without full knowledge of others’ system parameters or control *** efficacy of our method is illustrated by three examples.

关键词： Adaptive dynamic programming incomplete information multi-player differential game value iteration

Long Bialgebras,Dimodule Algebras and Quantum Yang-Baxter Modules over Long Bialgebras

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Acta Mathematica Sinica,English Series 2006年第4期22卷 1261-1270页

作者： Liang yun zhang College of Science Nanjing Agricultural University Nanjing 210095 P. R. China Department of Mathematics Nanjing University Nanjing 210008 P. R. China

This paper gives a sufficient and necessary condition for a bialgebra to be a Long bialgebra, and proves a braided product to be a Long bialgebra under some conditions. It also gives a direct sum decomposition of quan... 详细信息

关键词： Long bialgebra dimodule algebra braided product quantum Yang-Baxter module

The new RS CVn binary V1034 Her revisited and the orbital period—activity relation of short-period RS CVn binaries using photometric distortion amplitude

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Research in Astronomy and Astrophysics 2012年第4期12卷 433-442页

作者： Li-yun zhang College of Science/Department of Physics&NAOC-GZU-Sponsored Center for Astronomy Research Guizhou UniversityGuiyang 550025China

This paper presents new CCD BV RI light curves of the newly discovered RS CVn eclipsing binary V1034 Her in 2009 and 2010, the shapes of which are different from previously published results. They show an asymmetric outside eclipse, and we try to use a spot model to explain the phenomenon. Using the Wilson-Devinney program with a one-spot or two-spot model, photometric solutions of the system and starspot parameters were derived. Comparing the two results shows that the case of two spots is more successful in reproducing light-curve distortions. Looking at all the spot longitudes, the trend is towards active longitude belts and each active longitude belt may switch. Comparing the light curves from 2009 and 2010, we can see that the light curve changes over the long time scale of a year, especially in phase 0.25. In addition, we also collected the values of the maximum amplitudes of photometric distortion of the short-period RS CVn binary. We found for the first time that there is a trend of increasing activity with decreasing orbital period. Finally, fitting all available light minimum times including our newly obtained ones with a polynomial function confirmed that the orbital period of V1034 Her increased.

关键词： stars: binaries: late-type — stars: binaries: eclipsing — stars: individuals (V1034 Her) — stars: spots

A Class of Bidimensional FMRA Wavelet Frames

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Acta Mathematica Sinica,English Series 2006年第4期22卷 1051-1062页

作者： yun zhang LI Department of Applied Mathematics Beijing University of Technology Beijing 100022 P. R. China

This paper addresses the construction of wavelet frame from a frame multiresolution analysis （FMRA） associated with a dilation matrix of determinant ±2. The dilation matrices of determinant ±2 can be classified as six classes according to integral similarity. In this paper, for four classes of them, the construction of wavelet frame from an FMRA is obtained, and, as examples, Shannon type wavelet frames are constructed, which have an independent value for their optimality in some sense.

关键词： FMRA FMRA wavelet frame integral similarity

MECHANICAL PROPERTIES OF DIRECTIONALLY-SOLIDIFIED Ni_3Al CONTAINING BORON AND CARBON

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中国有色金属学会会刊：英文版 1997年第2期7卷 87-91页

作者： zhang, yun Lin, Dongliang Shanghai Jiao Tong Univ Shanghai China

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关键词： intermetallics Ni 3Al stoichiometry solid solution alloying mechanical property

Tension-compression asymmetry and corresponding deformation mechanism in ZA21 magnesium bars with bimodal structure

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International Journal of Minerals,Metallurgy and Materials 2023年第1期30卷 92-103页

作者： Yujiao Wang yun zhang Haitao Jiang Institute of Engineering Technology University of Science and Technology BeijingBeijing 100083China Beijing Institute of Machinery and Equipment Beijing 100854China

We investigated the asymmetric tension-compression(T-C)behavior of ZA21 bars with bimodal and uniform structures through axial tension and compression *** results show that the yield strengths of bars having bimodal structure are 206.42 and 140.28 MPa under tension and compression,respectively,which are higher than those of bars having uniform structure with tensile and compressive yield strength of 183.71 and 102.86 MPa,*** slip and extension twinning under tension and basal slip and extension twinning under compression dominate the yield behavior and induce the T-C ***,due to the basal slip activated in fine grains under tension and the inhibition of extension twinning by fine grains under compression,the bimodal structure possesses a lower T-C asymmetry(0.68)compared to the uniform structure(0.56).Multiple extension twins occur during deformation,and the selection of twin variants depends on the Schmid factor of the six variants activated by parent ***,the strengthening effect of the bimodal structure depends on the grain size and the ratio of coarse and fine grains.

关键词： bimodal structure deformation mechanism Hall-Petch relationship tension-compression asymmetry twin variant selection

Airborne pollen patterns and their relationship with meteorological factors in the Betula microphylla-dominated wetland of Ebinur Lake,Xinjiang,China

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Science China Earth Sciences 2021年第10期64卷 1746-1760页

作者： Lixin CHEN yun zhang Zhaochen KONG State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China College of Life Sciences University of Chinese Academy of SciencesBeijing 100049China College of Earth Sciences Hebei GEO UniversityShijiazhuang 050031China

Airborne pollen is indicative of vegetation and climatic *** study investigates airborne pollen trapping in the Betula microphylla-dominated wetland of Ebinur Lake in Northwestern China from September 2012 to August 2015 using Pearson correlation analysis and the Hybrid Single-particle Lagrangian Integrated Trajectory *** temperatures and moderate precipitation during the flowering period facilitated an increase in birch pollen with more exotic spruce pollen carried from the Tianshan Mountains by airflows,leading to the highest arbor pollen concentrations from September 2012 to August *** pollen concentrations from September 2013 to August 2014 were possibly due to an increase in herbaceous pollen resulting from higher temperatures,lower precipitation and more exotic pollen from the desert of southwest Ebinur Lake and Central Asia in summer and *** September 2014 and August 2015,unfavorable climate conditions in summer and autumn decreased the pollen dispersal of xerophytes such as Artemisia and Chenopodiaceae,with little pollen transported from the Kazakh hilly area in late summer,resulting in the lowest pollen *** parameters and air mass movements both greatly affected the atmospheric pollen *** results provide information concerning the dispersion and distribution of birch pollen,paleoenvironmental reconstruction and wetland conservation.

关键词： Airborne pollen Meteorological factor Pearson correlation Betula pollen Ebinur wetland

Learning Domain-Invariant and Discriminative Features for Homogeneous Unsupervised Domain Adaptation

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Chinese Journal of Electronics 2020年第6期29卷 1119-1125页

作者： zhang yun WANG Nianbin CAI Shaobin College of Computer Science and Technology Harbin Engineering University School of Electronic Information Engineering Foshan University

A classifier trained on the label-rich source dataset tends to perform poorly on the unlabeled target dataset because of the distribution discrepancy across different *** domain adaptation aims to transfer knowledge from the labeled source dataset to the unlabeled target dataset to solve this *** of the existing unsupervised domain adaptation methods only concentrate on learning domain-invariant features across different domains,but they neglect the discriminability of the learned features to satisfy the cluster *** this paper,we propose Semantic pairwise centroid alignment(SPCA),which is a point-wise method to learn both domain-invariant and discriminative features for homogeneous unsupervised domain *** utilizes a novel semantic centroid loss to reduce the intraclass distance in feature space by using source data and target High-confidence centroid points(HCCPs).Then a classifier trained on source features is expected to generalize well on target *** experiments on visual recognition tasks verify the effectiveness of the proposed SPCA and also demonstrate that both domaininvariant and discriminative features learned by SPCA can significantly boost the performance of homogeneous unsupervised domain adaptation.

关键词： HCCP learning domain-invariant features Knowledge engineering techniques visual recognition SPCA Image recognition point-wise method semantic pairwise centroid alignment unlabeled target dataset label-rich source dataset unsupervised learning high-confidence centroid points Computer vision and image processing techniques image classification domaininvariant features homogeneous unsupervised domain adaptation methods