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Evaluation of the stability of vegetated slopes according to layout and temporal changes

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Journal of Mountain Science 2021年第1期18卷 275-290页

作者： LI yun-peng hu Chao JIAN Li ZHAO ran LI Chen China Academy of Transportation Sciences Beijing 100029China. Qilu Transportation Development Group Jinan 250101China

Vegetation in slopes can effectively improve slope ***,it is difficult to estimate the effects of vegetation on slope stability because of variations in plant species and environmental ***,influences of plant growth on slope stability change with time,resulting in changes in the safety *** study was conducted to evaluate the stability of vegetated slopes with time and investigate the effects of different layouts of plant species on slope ***,we used a plant growth model and slope stability analysis to build an evaluation *** accomplish this,one species of tree,shrub and grass was chosen to set six layout patterns.A slope with no vegetation served as a *** safety factors of the seven slopes were then calculated using the developed evaluation model and differences in the safety factors of slopes were compared and *** slope vegetated with Platycladus orientalis reached the most stable state at the age of 60 *** slope(Vitex negundo)had the maximum safety factor after 20 ***,the safety factor of vegetated slopes increased from 12.1%to 49.6% compared to the slope with no *** wind force was considered,the safety factor value of the slope changed from 3.5%to 43.5%.Vegetation mixtures of trees and grasses resulted in the best slope *** grasses on slopes can improve slope stability of trees to a greater degree than that of slopes with shrubs in the early stage of growth.

关键词： Plant growth model Vegetated slope Slope stability Safety factor

Some Remarks on Teichmüller Spaces and Modular Groups

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Acta Mathematica Sinica,English Series 2009年第8期25卷 1289-1296页

作者： yun hu Department of Mathematics Soochow University Suzhou 215006 P. R. China

We study the fixed point sets of subgroups of modular groups acting on Teichmiiller spaces.

关键词： Teichmiiller space modular group allowable mapping

Self-management and self-efficacy status in liver recipients

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Hepatobiliary & Pancreatic Diseases International 2015年第3期14卷 253-262页

作者： Lei Xing Qin-yun Chen Jia-Ning Li Zhi-Qiu hu Ye Zhang ran Tao Center for Organ Transplantation and Department of Surgery Ruijin Hospital Shanghai Jiaotong University School of Medicine Nursing School Shanghai Jiaotong University School of Medicine Department of General Surgery Central Hospital of Minhang District

BACKGROUND： Liver transplantation （LT） is a viable treatment for patients with end-stage chronic liver diseases. The main aim of LT is to prolong life and improve life quality. However, although survival after LT continues to improve, some aspects of recipient＇s health-related quality of life such as self-man- agement and self-efficacy have been largely ignored.

关键词： liver transplantation self-management self-efficacy quality of life questionnaires

Improved Hardy–Littlewood–Sobolev Inequality on S^(n)under Constraints

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Acta Mathematica Sinica,English Series 2023年第11期39卷 2149-2163页

作者： yun yun hu Jing Bo DOU School of Mathematics and Statistics Shaanxi Normal UniversityXi’an 710119P.R.China

In this paper,we establish an improved Hardy–Littlewood–Sobolev inequality on Snunder higher-order moments ***,by constructing precise test functions,using improved Hardy–Littlewood–Sobolev inequality on S^(n),we show such inequality is almost optimal in critical *** an application,we give a simpler proof of the existence of the maximizer for conformal Hardy–Littlewood–Sobolev inequality.

关键词： Hardy–Littlewood–Sobolev inequality higher-order moments constraint concentration compactness principle almost optimal

Impact of Annealing on the Melt Recrystallization of a-PDLA/α-PLLA Double-layered Films

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Chinese Journal of Polymer Science 2024年第2期42卷 230-238,I0009页

作者： yun-Peng Li Hao-ran Shen Shao-Juan Wang Hao Zhang Jian hu Rui Xin Xiao-Li Sun Shou-Ke Yan Key Laboratory of Rubber-Plastics Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plasticsQingdao University of Science&TechnologyQingdao266042China State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing100029China

Poly(lactic acid)(PLA) as a bio-based polymer with biodegradability and biocompatibility has attracted much attention. To manipulate its properties for different applications, regulation of crystal structure and crystalline morphology becomes an attractive research topic. In this work, the structure evolution of layered samples containing an amorphous poly(D-lactide)(PDLA) layer and a crystalline poly(L-lactide)(PLLA)layer with highly oriented edge-on α lamellar crystals after annealing at 150 ℃ or/and after melt-recrystallization has been studied by AFM, FTIR,and TEM combined with electron diffraction. The results demonstrate that melt recrystallization of the as-prepared sample leads to the formation of abundant randomly oriented PLA stereo-complex(PLA SC) crystals. Annealing at 150 ℃ results in the formation of a small amount of oriented PLA SC crystals at the interface. These PLA SC crystals show great impact on the recrystallization behavior of sample after melting at 190 ℃ and then crystallizing at 90 ℃. First, they impede the mutual diffusion of the overlying PDLA and underlying PLLA, and thus reduce their stereocomplexation ability as manifested by the decreased amount of PLA SC crystals. Second, they act as substrate to initiate the epitaxial crystallization of the overlying PDLA and underlying PLLA, which ensures the production of a highly oriented structure of PDLA and PLLA after melt recrystallization again.

关键词： Poly(L-lactide) Poly(D-lactide) Double layer Stereocomplex

Isomorphisms of fiber spaces over Teichmüller spaces

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Science China Mathematics 2006年第7期49卷 877-892页

作者： hu yun SHEN Yuliang Department of Mathematics Suzhou University Suzhou 215006 China Department of Mathematics Suzhou University Suzhou 215006 China

We will be mainly concerned with some important fiber spaces over Teichmuller spaces, including the Bers fiber space and Teichmuller curve, establishing an isomorphism theorem between 'punctured' Teichmuller curves an... 详细信息

关键词： Teichmuller space Bers fiber space 'punctured' fiber space Teichmuller curve 'punctured' Teichmuller curve biholomorphic isomorphism.

基于CNN和Transformer交叉教学的半监督医学图像分割

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陕西科技大学学报 2025年第1期43卷 185-192页

作者：杨云胡雯青杨虹吴亚男陕西科技大学电子信息与人工智能学院陕西西安710021 西安富德医疗电子有限公司陕西西安710075 西安计量技术研究院陕西西安710199

由于医学图像分割领域缺乏高质量的标注数据,半监督学习方法在医学图像语义分割任务中受到高度重视.为了充分利用卷积神经网络(Convolutional Neural Network,CNN)和Transformer在半监督学习中的优势,本文提出一种基于CNN与Transformer... 详细信息

由于医学图像分割领域缺乏高质量的标注数据,半监督学习方法在医学图像语义分割任务中受到高度重视.为了充分利用卷积神经网络(Convolutional Neural Network,CNN)和Transformer在半监督学习中的优势,本文提出一种基于CNN与Transformer交叉教学的半监督医学图像分割方法.该方法将经典的深度协同训练从一致性正则化简化为交叉教学,利用循环伪标签方案使两个网络的预测差异转换为无监督损失,以鼓励两个网络具有一致的低熵预测.所提方法在ISIC 2018数据集上进行实验,在采用20%的标注比例时,Dice系数和Jaccard系数分别达到87.25%和79.17%,相比于监督U-Net++的训练结果分别提升了2.89%和3.53%,并且优于目前主流的半监督学习方法,验证了所提方法在半监督医学图像分割上的有效性和泛化性.

关键词：半监督学习图像语义分割交叉教学循环伪标签

Multi-time Collaborative Restoration for Integrated Electrical-gas Distribution Systems Based on Rolling Optimization

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CSEE Journal of Power and Energy Systems 2024年第2期10卷 660-671页

作者： Jingyang yun Zheng Yan yun Zhou Peichao Zhang Weidong hu Key Laboratory of Control of Power Transmission and Conversion of Ministry of Education Department of Electrical EngineeringShanghai Jiao Tong University

This paper proposes a multi-time collaborative restoration model for integrated electricity-gas distribution sys-tems(IEGDSs)considering multiple resources after extreme weather *** on the linearized power flow constraints of the unbalanced electrical distribution system(EDS)and gas distribution system(GDS),this problem can be formulated as a mixed-integer linear programming(MILP)*** improve the efficiency and veracity of the solution,a rolling optimiza-tion based two-stage method is developed with the first stage solved by a linear approximation model,and the second stage solved by real-time updated rolling *** solving the MILP problem using rolling optimization,the proposed model and solution method achieve efficient and reliable collaborative restoration of IEGDS considering multiple resources and unbal-anced operation characteristics of *** effectiveness of the proposed model and method is validated by using an IEGDS made of a 37-bus unbalanced EDS and 11-node *** Terms-Electricity-gas system,mix-integer linear programming,power system restoration.

关键词： Electricity-gas system mix-integer linear programming power system restoration

Kobayashi＇s and Teichmiiller＇s Metrics on the Teichmiiller Space of Symmetric Circle Homeomorphisms

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Acta Mathematica Sinica,English Series 2011年第3期27卷 617-624页

作者： Jun hu yun Ping JIANG Department of Mathematics Brooklyn College of CUNY Brooklyn NY 11210 USA Department of Mathematics CUNY Graduate Center 365 Fifth Avenue New York NY 10016 USA Department of Mathematics Queens College of CUNY Flushing NY 11367 USA

We give a direct proof of a result of Earle, Gardiner and Lakic, that is, Kobayashi＇s metric and Teichmuller＇s metric coincide with each other on the Teichmfiller space of symmetric circle homeomorphisms.

关键词： Universal asymptotically conformal Teichmiiller space Teichmiiller's metric Kobayashi's metric