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An Algorithm of Deformation Image Correction Based on Spatial Mapping

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Chinese Journal of Electronics 2024年第5期33卷 1326-1336页

作者： xiangyu deng Aijia ZHANG Jinhong YE College of Physics and Electronic Engineering Northwest Normal University

The original image undergoes geometric deformation in terms of position, shape, size, and orientation due to the shooting angle or capturing process during image acquisition. This leads to inconveniences and significant challenges in various image processing fields such as image fusion, denoising, recognition, and segmentation. To enhance the processing ability and recognition accuracy of deformation images, an adaptive algorithm for correcting image deformities is proposed for quadrilaterals and triangles. Firstly, the deformation image undergoes preprocessing, and the contour of the image edge is extracted. Then, discrete points on the image edge are identified to accurately locate the edges. Finally, the deformation of the quadrilateral or triangle is transformed into a standard rectangular or equilateral triangular image using the proposed three-dimensional homography transformation algorithm. This effectively completes the conversion from an irregular image to a regular image in an adaptive manner. Numerous experiments demonstrate that the proposed algorithm surpasses traditional methods like Hough transform and Radon *** improves the effectiveness of correcting deformation in images, effectively addresses the issue of geometric deformation, and provides a new technical method for processing deformation images.

关键词： Image segmentation Deformation Filtering Shape Image edge detection Noise reduction Morphology

Development of porphyrin and titanium dioxide sonosensitizers for sonodynamic cancer therapy

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Biomaterials Translational 2021年第1期2卷 72-85页

作者： xiangyu deng Zengwu Shao Yanli Zhao Department of Orthopaedic Surgery Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei ProvinceChina Division of Chemistry and Biological Chemistry School of Physical and Mathematical SciencesNanyang Technological UniversitySingapore

Sonodynamic therapy for malignant tumours has gained much attention for its deep penetration effect and efficient tumour killing *** design,modification,and utilization of sonosensitizers are important aspects of sonodynamic *** an essential factor in this process,highly effective sonosensitizers should be developed to facilitate the clinical applications of sonodynamic *** review takes porphyrin-and titanium dioxide(TiO_(2))-based systems as representative organic and inorganic sonosensitizers respectively,and summarizes their characteristics and biological effects as sonodynamic *** discovery of novel sonosensitizers,sonodynamic therapy becomes an efficient means of adjuvant therapy for the treatment of malignant tumours.

关键词： cancer treatment porphyrins sonodynamic therapy sonosensitizers TiO_(2)

Community Planning Based on Socio-Spatial Production:Explorations in “New Qinghe Experiment”

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China City Planning Review 2017年第2期26卷 6-13页

作者： Liu Jiayan deng xiangyu Li Caige School of Architecture Tsinghua University Beijing Tsinghua Tongheng Planning and Design Institute Co.Ltd.

Rapid urbanization and the booming of diversified community development requirements have challenged the development of community planning in China from theory to practice. Community planning, especially with localized and practice-oriented characteristics, is now facing many limitations. These include aspects such as traditional urban planning techniques that mainly focus on space, a restricted research perspective, as well as basic planning theories that are mostly imported from the West. Using the perspective of socio-spatial dialectic for reference, this paper summarizes the evolution process of Chinese modern residential space planning and design from residential district planning under the planned economy system, to housing estate planning in the real estate development, and to community planning in the new era, presenting an important characteristic of transitioning from "producing space" to "production of space," with "society" gradually replacing "space" and returning to the goal of production. Based on the analysis on the main limitations and problems in the former work of community planning in China, the paper takes the practical exploration on community planning in the "New Qinghe Experiment" in Haidian District, Beijing for an example. Aimed at the prominent problem of an extreme imbalance between "urbanization of space" and "urbanization of population" in the current Qinghe area, the key objective, means, and technical path of new-type community planning are proposed, within which three significant transition features are demonstrated, including going from "need-oriented" to "capital-oriented," from "interest intervention" to "relationship intervention," and from "community construction" to "community building."

关键词： community planning socio-spatial production New Qinghe Experiment producing space production of space

Time domain characteristic analysis of non-coupled PCNN

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Optoelectronics Letters 2024年第11期20卷 689-696页

作者： deng xiangyu YU Haiyue HUANG Xikai College of Physics and Electronic Engineering Northwest Normal UniversityLanzhou 730070China

Pulse-coupled neural network(PCNN)is a multi-parameter artificial neural network,and the characteristics of PCNN can be fully explored by analyzing different simplified *** this paper,the firing characteristics of non-coupled PCNN with coupled linking term are studied,the mathematical expressions of firing time and interval are summarized,and further the influence of linking weight matrix and linking weight coefficient on network characteristics is analyzed,and the constraints of parameters are ***,extensive verification experiments are carried out for the phenomenon of image edge detection that occurs in the experiments,which provides theoretical support for further research and application of PCNN model.

关键词： neural artificial linking

Three-dimensional biofabrication of an aragoniteenriched self-hardening bone graft substitute and assessment of its osteogenicity in vitro and in vivo

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Biomaterials Translational 2020年第1期1卷 69-81页

作者： Yunsong Shi Ruijun He xiangyu deng Zengwu Shao Davide Deganello Chunze Yan Zhidao Xia Union Hospital affiliated to Tongji Medical College of Huazhong University of Science and Technology WuhanHubei ProvinceChina Centre for Nanohealth Swansea University Medical SchoolSwanseaUK Centre for Nanohealth Faculty of Science and EngineeringSwansea UniversitySwanseaUK State Key Laboratory of Materials Processing and Die&Mould Technology Huazhong University of Science and TechnologyWuhanHubei ProvinceChina

A self-hardening three-dimensional(3D)-porous composite bone graft consisting of 65 wt%hydroxyapatite(HA)and 35 wt%aragonite was fabricated using a 3D-Bioplotter®.New tetracalcium phosphate and dicalcium phosphate anhydrous/aragonite/gelatine paste formulae were developed to overcome the phase separation of the liquid and solid *** mechanical properties,porosity,height and width stability of the end products were optimised through a systematic analysis of the fabrication processing parameters including printing pressure,printing speed and distance between *** resulting 3D-printed bone graft was confirmed to be a mixture of HA and aragonite by X-ray diffraction,Fourier transform infrared spectroscopy and energy dispersive X-ray *** compression strength of HA/aragonite was between 0.56 and 2.49 *** was assessed using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide(MTT)assay in *** osteogenicity of HA/aragonite was evaluated in vitro by alkaline phosphatase assay using human umbilical cord matrix mesenchymal stem cells,and in vivo by juxtapositional implantation between the tibia and the anterior tibialis muscle in *** results showed that the scaffold was not toxic and supported osteogenic differentiation in ***/aragonite stimulated new bone formation that bridged host bone and intramuscular implants in *** conclude that HA/aragonite is a biodegradable and conductive bone formation biomaterial that stimulates bone *** this material is formed near 37°C,it will have great potential for incorporating bioactive molecules to suit personalised application;however,further study of its biodegradation and osteogenic capacity is *** study was approved by the Animal Ethical Committee at Tongji Medical School,Huazhong University of Science and Technology(IACUC No.738)on October 1,2017.

关键词： biofabrication cytotoxicity hydroxyapatite/aragonite osteogenesis

Power,Society,and Living Space: Evolution and Formation Mechanism of Urban Streets in China

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China City Planning Review 2013年第1期22卷 6-14页

作者： Jiayan LIU xiangyu deng Caige LI School of Architecture Tsinghua University

Being one of the most important elements of urban public space, streets have contained rich social lives as well as the social and political connotations in Chinese cities with specific local characteristics, while most of them have been long neglected in the researches focusing on grand narratives and center-based perspectives. The paper retrospectively analyzes the evolution process of urban streets in China, dividing it into four critical periods. With the perspective of socio-spatial analysis, the unique formation mechanisms of Chinese urban streets are summarized in different contexts including power system, social domain, and living space, thus to provide references for the exploration of street development mode and revitalization mechanism facing the multiple challenges of globalization, modernity, as well as local social and cultural traditions.

关键词： street power living space China

F-Net: breast cancerous lesion region segmentation based on improved U-Net

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Optoelectronics Letters 2024年

作者： deng xiangyu PAN Lihao DANG Zhiyan College of Physics and Electronic Engineering， Northwest Normal University

In order to solve the challenge of breast cancer region segmentation， we improved the U-Net network. CBAM-PA and Dformer modules were designed to replace the convolutional layers at the encoding side in the base U-Net; the input logic of the U-Net network was improved by dynamically adjusting the input size of each layer; and the short connections in the U-Net network were replaced with cross-layer connections to enhance the image restoration capability at the decoding side. On the BUSI dataset， we obtain a Dice coefficient of 0.8031 and an IoU value of 0.7362. The experimental results show that the proposed enhancement method effectively improves the accuracy and quality of breast cancer lesion region segmentation.

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修正非线性误差的宽量程多电桥电阻测量电路设计

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电子测量与仪器学报 2016年第9期30卷 1418-1424页

作者：邓翔宇兰州工业学院电子信息工程学院兰州746500

利用电桥测量电阻是各种自动控制和检测系统中广泛使用的一种方法,其测量精度和范围成为测量电路设计的关键技术。为解决传统单电桥电阻测量电路在宽量程范围内进行高精度测量的问题,通过对单电桥待测电阻与输出电压之间变化关系的分析... 详细信息

利用电桥测量电阻是各种自动控制和检测系统中广泛使用的一种方法,其测量精度和范围成为测量电路设计的关键技术。为解决传统单电桥电阻测量电路在宽量程范围内进行高精度测量的问题,通过对单电桥待测电阻与输出电压之间变化关系的分析,指明了等效电压与实际电压之间的非线性误差,提出了一种查表式修正非线性误差的方法,并给出了在线性公式基础上修正非线性误差的计算公式以及测量精度计算公式,在此基础上设计了一种基于单片机控制的可根据待测电阻值区间自动进行切换的多电桥电阻测量电路。该电路能够在较宽的量程范围内取得较高的测量精度,与传统的手动档位仪表相比较具有更好的便捷性和准确度。

关键词：测量电桥非线性误差测量精度测量电路

短时冻区冰雪消融对残积土坡非平衡渗流与稳定性作用机理分析

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工程科学与技术 2017年第6期49卷 73-83页

作者：阙云邓翔宇陈嘉福州大学土木工程学院福建福州350108 福州大学数学与计算机科学学院福建福州350108

为揭示短时冻区冰雪消融对残积土坡非平衡渗流与稳定性作用机理,分别基于非饱和渗流模型与非平衡流模型,分析福建省冰雪消融诱发某一边坡的失稳原因,并研究不同大孔隙直径、间距、弯曲率及长度对考虑非平衡流的边坡水分场与安全系数的... 详细信息

为揭示短时冻区冰雪消融对残积土坡非平衡渗流与稳定性作用机理,分别基于非饱和渗流模型与非平衡流模型,分析福建省冰雪消融诱发某一边坡的失稳原因,并研究不同大孔隙直径、间距、弯曲率及长度对考虑非平衡流的边坡水分场与安全系数的影响规律。结果表明:非平衡渗流相比于非饱和渗流对于边坡稳定性的影响明显更大,采用非平衡流理论可合理解释冰雪消融条件诱发残积土边坡失稳机理;增大大孔隙直径可增大大孔隙域与周围基质域的水分交换量,减缓水流的优先传导作用并使孔隙水压力增长,从而使边坡稳定性降低;增加大孔隙长度,延长了水分的传导路径,削弱大孔隙域内水分的积累效果,对于边坡安全系数有一定影响;增加大孔隙弯曲率对于基质域含水率及边坡安全系数影响很小,可忽略不计。边坡安全系数与大孔隙间距之间存在安全系数最小的临界间距,间距过大导致大孔隙群的优先流效应无法发挥;间距过小导致大孔隙间非平衡流相互叠加与干扰,削弱大孔隙对于深处孔隙水压力的影响。因此,对于短时冻区冰雪消融诱发含大孔隙边坡的失稳问题,应考虑非平衡流的影响,尤其是大孔隙间距与长度的影响。

关键词：残积土坡短时冻区冰雪消融非平衡流稳定性