检索结果-内蒙古大学图书馆

High-resolution Remote Sensing Image Semi-global Matching Method Considering Geometric Constraints of Connection Points and Image Texture Information

引用

Journal of Geodesy and Geoinformation Science 2021年第4期4卷 97-112页

作者： Jingguo LV Xingbin YANG Danlu ZHANG Shan JIANG Shool of Geomatics and Urban Spatial Informatics Beijing University of Civil Engineering and ArchitectureBeijing 102616China

Dense matching of remote sensing images is a key step in the generation of accurate digital surface *** semi-global matching algorithm comprehensively considers the advantages and disadvantages of local matching and global matching in terms of matching effect and computational efficiency,so it is widely used in close-range,aerial and satellite image *** on the analysis of the original semi-global matching algorithm,this paper proposes a semi-global high-resolution remote sensing image that takes into account the geometric constraints of the connection points and the image texture information based on a large amount of high-resolution remote sensing image data and the characteristics of clear image texture.123123The method includes 4 parts:①Precise *** at the system error in the image orientation model,the system error of the rational function model is compensated by the geometric constraint relationship of the connecting points between the images,and the sub-pixel positioning accuracy is obtained;②Epipolar image *** the original image is divided into blocks,the epipolar image is generated based on the projection trajectory method;③Image dense *** order to reduce the size of the cost space and calculation time,the image is pyramided and then semi-globally matched layer by *** the matching process,the disparity map expansion and erosion algorithm that takes into account the image texture information is introduced to restrict the disparity search range and better retain the edge characteristics of the ground objects;④Generate *** order to test the matching effect,the weighted median filter algorithm is used to filter the disparity map,and the DSM is obtained based on the principle of forward ***,the paper uses the matching results of WordView3 and Ziyuan No.3 stereo image to verify the effectiveness of this method.

关键词： geometric constraints image texture information semi-global matching

来源：评论

学校读者我要写书评

暂无评论

An idealized human cardiomyocyte finite element model for studying the interaction between the cross-bridge state and cell mechanical response *

An idealized human cardiomyocyte finite element model for st...

引用

Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： Taiwei Liu Sergey Simakov Fuyou Liang Taiwei Liu and Fuyou Liang are With Department of Engineering Mechanics Shool of Naval Architecture Ocean and Civil Engineering Shanghai Jiao Tong University Shanghai China Marchuk Institute of Numerical Mathematics of the Russian Academy of Sciences Moscow Russia

The mechanical state of cardiomyocyte is directly related to the structure and function of internal sarcomeres. In the field of computational cardiac mechanics, attempts to establish models of human cardiomyocyte with a detailed representation of sarcomere cross-bridge (XB) are rare. In this study, we established a computational model for a cardiomyocyte with idealized geometry while containing a representative sarcomere composed of thick filament, thin filament, titin filament, and Z-disc. The formation of XB with passive tension in the model was simulated with the finite element (FE) method, and stochastic FE analyses were further carried out in conjunction with six sigma analysis to explore the interaction between the S1 power stroke and the twitch mechanics of cardiomyocyte. The proposed modeling method may help us better understand the working state of cardiomyocyte, and offer a potential means for exploring the cell-level mechanisms of cardiac diseases.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Numerical Simulation Research on the Influence Factors of Geotextile Control of Subgrade Collapse

Numerical Simulation Research on the Influence Factors of Ge...

引用

Hydraulic and civil engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR), International Conference on

作者： Dan Li Yihuai Liang Qiong Wang Yanxin Yang Di Wu Department of Geotechnical Engineering College of Civil Engineering Tongji University School of Architecture and Transportation Engineering Guilin University of Electronic Technology Guilin China Shool of Architecture and Transportation Engineering Guilin University of Electronic Technology Guilin China Department of Geotechnical Engineering College of Civil Engineering Tongji University Shanghai China

ISBN: (纸本)9781665465540

The influence factors of geotextile control of subgrade collapse were studied in this paper. To evaluate the influence of the subsidence width, tensile stiffness of geotextile and finite element software meshing three factors on subgrade subsidence treatment, finite element analysis was performed. The soil pressure, vertical deflection of the geotextile and soil settlement were analyzed. The results showed that the soil pressure, vertical deflection of the geotextile and soil settlement increased as the subsidence width increased. When an anchorage ratio $L$ was equale or smaller than 0.5B, the geotextile was not suitable for treatment of a subgrade collapse. With the tensile stiffness of geotextile increased, the soil pressure increased, while vertical deflection of the geotextile and soil settlement decreased. It indicated that improving the tensile stiffness of geotextiles is improving safety of the structure. As the change of the finite element software meshing, the curves trend of the vertical deflection of the geotextile and soil settlement unchanged which indicated the effect of the finite element software meshing on model performance was neglectable.

关键词： Hydraulic systems Soil Numerical simulation Market research Software Finite element analysis Numerical models

来源：评论

学校读者我要写书评

暂无评论

Progress and Achievements of Multi-sensor Fusion Navigation in China during 2019—2023

引用

Journal of Geodesy and Geoinformation Science 2023年第3期6卷 102-114页

作者： Xingxing LI Xiaohong ZHANG Xiaoji NIU Jian WANG Ling PEI Fangwen YU Hongjuan ZHANG Cheng YANG Zhouzheng GAO Quan ZHANG Feng ZHU Weisong WEN Tuan LI Jianchi LIAO Xin LI Shool of Geodesy and Gevmatics Wuhan UniversityWuhan 430074China School of Geomatics and Urban Spatial Infor-matics Beijing University of Civil Engineering and ArchitectureBeijing 100044China Shanghai Jiao Tong University Shanghai 200052China Center for Brain-inspired Computing Research Tsinghua UniversityBeijing 100084China School of Land Science and Technology China University of Geosciences(Beijing)Beijing 100084China Department of Aeronautical and Aviation Engineering The Hong Kong Polytechnic UniversityHong Kong 900777China School of Electronic and Information Engineering Beihang UniversityBeijing 100191China Advanced Research Institute of Multidisciplinary Sci-ences Beijing Institute of TechnologyBeijing 100081China Hubei Luojia Laboratory Wuhan 430074China

Global Navigation Satellite System(GNSS)can provide all-weather,all-time,high-precision positioning,navigation and timing services,which plays an important role in national security,national economy,public life and other ***,in environments with limited satellite signals such as urban canyons,tunnels,and indoor spaces,it is difficult to provide accurate and reliable positioning services only by satellite ***-source sensor integrated navigation can effectively overcome the limitations of single-sensor navigation through the fusion of different types of sensor data such as Inertial Measurement Unit(IMU),vision sensor,and LiDAR,and provide more accurate,stable and robust navigation information in complex *** summarizes the research status of multi-source sensor integrated navigation technology,and focuses on the representative innovations and applications of integrated navigation and positioning technology by major domestic scientific research institutions in China during 2019—2023.

关键词： Simultaneous Localization And Mapping(SLAM) integrated navigation multi-sensor fusion

来源：评论

学校读者我要写书评

暂无评论

Spatial-Temporal Heterogeneity of Rock Samples’ Deformation and Damage: Experimental Study and Digital Image Correlation Analysis

Research Square

引用

Research Square 2021年

作者： Yan, Fayuan Qi, Chengzhi Shan, Renliang Shool of Mechanics and Civil Engineering China University of Mining & Technology - Beijing Campus Beijing100083 China International Cooperation Base of Beijing Transportation Infrastructure Construction Beijing Future Urban Design High-Tech Innovation Center Beijing University of Civil Engineering and Architecture Beijing100044 China

In-situ observations and laboratory experiments showed that slow deformation waves widely exist in geomedia under loading conditions. Slow deformation waves’ behavior exhibits some similarities in media ranging from the scale as large as the Earth's crust to the scale as small as the laboratory test samples. However, the mechanism underlying their generation has not been clarified yet. In this research an experimental study was performed on small-scale red sandstone samples subjected to uniaxial compression at the displacement rates of 0.1, 0.5, and 1 mm/min. Slow deformation waves under different loading rates were analyzed by speckle photography for microscopic characterization combined with the digital image correlation (DIC) technique. The Luders deformation bands were predominantly observed in the flow channels formed at the stage of macro-elastic deformation. The spatial-temporal heterogeneity of the rock sample surface was quantified, and the deformation waves' propagation velocities under different loading rates were obtained. The linear relationship between the propagation velocities of slow deformation waves and the loading rates was determined. The research findings shed some new lights on the evolutionary characteristics of the slow deformation waves. © 2021, CC BY.

关键词： Image correlation

来源：评论

学校读者我要写书评

暂无评论

The monitoring case of ground-based synthetic aperture radar with frequency modulated continuous wave system

The monitoring case of ground-based synthetic aperture radar...

引用

ISPRS Geospatial Week 2017

作者： Zhang, H.Y. Zhai, Q.P. Chen, L. Liu, Y.J. Zhou, K.Q. Wang, Y.S. Dou, Y.D. School of Naval Architecture and Mechanical-electrical Engineering Zhejiang Ocean University Zhoushan China Tianjin Saruide Technology Co. Ltd Tianjin China Co. Ltd Beijing China Shool of Geomatics and Urban Spatial Information Beijing University of Civil Engineering and Architecture Beijing China

The features of the landslide geological disaster are wide distribution, variety, high frequency, high intensity, destructive and so on. It has become a natural disaster with harmful and wide range of influence. The technology of ground-based synthetic aperture radar is a novel deformation monitoring technology developed in recent years. The features of the technology are large monitoring area, high accuracy, long distance without contact and so on. In this paper, fast ground-based synthetic aperture radar (Fast-GBSAR) based on frequency modulated continuous wave (FMCW) system is used to collect the data of Ma Liuzui landslide in Chongqing. The device can reduce the atmospheric errors caused by rapidly changing environment. The landslide deformation can be monitored in severe weather conditions (for example, fog) by Fast-GBSAR with acquisition speed up to 5 seconds per time. The data of Ma Liuzui landslide in Chongqing are analyzed in this paper. The result verifies that the device can monitor landslide deformation under severe weather conditions.

关键词： Data acquisition

来源：评论

学校读者我要写书评

暂无评论

Energy Efficiency and User Comfort in the Workplace: Norwegian Cellular vs. British Open Plan Workplaces

引用

Energy Procedia 2015年 75卷 807-812页

作者： Sally S. Shahzad John Brennan Dimitris Theodossopoulos Ben Hughes John Kaiser Calautit Edinburgh School of Architecture and Landsacpe Architecture Edinburgh College of Art University of Edinburgh EH1 1JZ UK Shool of Civil Engineering Faculty of Engineering Unviersity of Leeds LS2 9JT UK

Two office layouts with high and low levels of thermal control were compared, respectively Norwegian cellular and British open plan offices. The Norwegian practice provided every user with control over a window, blinds, door, and the ability to adjust heating and cooling. Occupants were expected to control their thermal environment to find their own comfort, while air conditioning was operatingin the background to ensure the indoor air quality. In contrast, in the British office, limited thermal control was provided through openable windows and blinds only for occupants seated around the perimeter of the building. Centrally operated displacement ventilation was the main thermal control system. Users’ perception of thermal environment was recorded through survey questionnaires, empirical building performance through environmental measurements and thermal control through semi-structured interviews. The Norwegian office had35% higher user satisfaction and 20% higher user comfort compared to the British open plan office. However, the energy consumption in the British practice was within the benchmark and much lower than the Norwegian office. Overall, a balance between thermal comfort and energy efficiency is required, as either extreme poses difficulties for the other.

关键词： Thermal comfort energy indiviual control workplace cellular plan open plan office

来源：评论

学校读者我要写书评

暂无评论

Fatigue analysis of composite insulator under aeolian vibration

Fatigue analysis of composite insulator under aeolian vibrat...

引用

International Conference on Measuring Technology and Mechatronics Automation

作者： Qi, Xiao Jingsu, Cai Shool of Civil and Architecture Engineering Northeast Dianli University Jilin Jilin 132012 China

ISBN: (纸本)9780769542966

Conductor, which is in the condition of aeolian vibration for long period,will transfer vibration to the composite insulator,so composite insulator is frequently subjected to vibrational fatigue *** paper takes a 500kV transmission line for example, calculates the max dynamic bending stress of wire clamp exit,and gets the vibrational load values, which are caused from conductor aeolian vibration, according to the conductor hanging *** the same time,this article builds composite insulator solid model basing on the ANSYS software, represents probability distribution of vibration frequency using Weibull distribution, and analyses fatigue coefficient of use up of composite insulator within every frequency segment,according to Miner linear fatigue damage accumulation *** we get the fatigue life of composite insulator. © 2011 IEEE.

关键词： Vibration analysis

来源：评论

学校读者我要写书评

暂无评论

The effect of elastic modulus and poisson ratio on the safety factor of the slope based on three criteria

The effect of elastic modulus and poisson ratio on the safet...

引用

International Conference on Consumer Electronics, Communications and Networks

作者： Hong-Bin, Yan Cui-Na, Yang Xiao-Yu, Ma Shool of Civil Engineering and Architecture Wuhan University of Technology Wuhan 430070 China Xinxiang University Xinxiang 453003 China Department of Civil Engineering Xinxiang University Xinxiang 453003 China Department of Civil Engineering Hebei University of Engineering Handan 056038 China

ISBN: (纸本)9781612844572

With the development of FEM and computation methods, the study and use of shear strength reduction technology in slope stability analysis is becoming increasingly popular. In this paper, the effect of elastic modulus and poisson ratio on the safety factor of the slope as well as the width of it's plastic zone domain (zone) is examined by using three criteria based on SSR technique. © 2011 IEEE.

关键词： Poisson ratio

来源：评论

学校读者我要写书评

暂无评论

A Preliminary Research on Operation Mode of Condensing Heat Recovery Hot Water Supply System for Water-Cooled Chillers

A Preliminary Research on Operation Mode of Condensing Heat ...

引用

The International Conference on Recent Trends in Materials and Mechanical engineering(ICRTMME 2011)

作者： Wei Cai Xiaoman Du Zhaohui Wu School of Civil Engineering and Architecture Ningbo University of Technology Shool of Geoscience and Surveying Engineering China University of Mining & Technology

The objective of the present paper is to investigate the condenser heat recovery in water-cooled chiller systemAccording to the technology characteristics of vapor compression refrigerating cycle, the viewpoint of condensing heat reclaim was proposed, and heat recovery system can be used in buildingsAir-cooled and water-cooled chillers with heat reclaim capability were discussedThree optimized water system designs were introduced for more heat recovery or higher heating water temperatureThe results show that it is very useful for designing and developing the new heat recovery unit with high efficiency, energy conservation, and environmental protection by analyzing the feature feasibility of condenser heat recovery systemThe control of entering-condenser water temperature is recommended for higher chiller efficiency and operating steadily, the water system designs of preferential loading and side stream are for more heat recovery.

关键词： Heat Recovery,Energy Conservation,Chiller,Air Conditioning,Hot Water Supply

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：