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SC-GAN:A Spectrum Cartography with Satellite Internet Based on Pix2Pix Generative Adversarial Network
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作者 Zhen Pan Zhang Bangning +2 位作者 Wang Heng MaWenfeng Guo Daoxing 《China Communications》 2025年第2期47-61,共15页
The increasing demand for radioauthorized applications in the 6G era necessitates enhanced monitoring and management of radio resources,particularly for precise control over the electromagnetic environment.The radio m... The increasing demand for radioauthorized applications in the 6G era necessitates enhanced monitoring and management of radio resources,particularly for precise control over the electromagnetic environment.The radio map serves as a crucial tool for describing signal strength distribution within the current electromagnetic environment.However,most existing algorithms rely on sparse measurements of radio strength,disregarding the impact of building information.In this paper,we propose a spectrum cartography(SC)algorithm that eliminates the need for relying on sparse ground-based radio strength measurements by utilizing a satellite network to collect data on buildings and transmitters.Our algorithm leverages Pix2Pix Generative Adversarial Network(GAN)to construct accurate radio maps using transmitter information within real geographical environments.Finally,simulation results demonstrate that our algorithm exhibits superior accuracy compared to previously proposed methods. 展开更多
关键词 electromagnetic situation Pix2Pix generative adversarial network radio map satellite internet spectrum cartography
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基于改进U^(2)-Net和生成对抗网络的深海图像增强算法
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作者 张泽群 张春堂 樊春玲 《电子测量技术》 北大核心 2026年第1期199-206,共8页
高质量深海图像对研究海洋生物、地形和地质等领域的发展至关重要。针对深海图像存在的颜色失真、图像模糊、对比度低等问题,提出一种以改进U^(2)-Net为GAN生成器的深海图像增强算法U^(2)-GAN。首先,在U-Net中引入RSU模块来构建改进U^(2... 高质量深海图像对研究海洋生物、地形和地质等领域的发展至关重要。针对深海图像存在的颜色失真、图像模糊、对比度低等问题,提出一种以改进U^(2)-Net为GAN生成器的深海图像增强算法U^(2)-GAN。首先,在U-Net中引入RSU模块来构建改进U^(2)-Net,加强对高层抽象特征和低层细节信息的融合。其次,在改进U^(2)-Net的跳跃连接部分引入DA注意力机制,强化空间与各通道之间的相互关系,提取水下颜色和纹理细节。然后,将融入DA注意力机制的U^(2)-Net作为GAN网络的生成器,在对抗中提升增强图像的真实性,并且引入边缘损失和感知损失,重构DS损失函数,多角度指导网络学习深海图像到目标图像的映射关系。最后,在自建数据集DSIED上对U^(2)-GAN与7种先进水下图像增强算法进行对比。U^(2)-Net在PSNR、SSIM、IE、UIQM、UCIQE、PCQI相较于Sea-Pix-GAN提高了5.6%、3.9%、5.2%、16.0%、7.1%、2.4%,具有更好的水下图像增强效果。 展开更多
关键词 深海图像增强 生成对抗网络 U^(2)-Net 注意力机制
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Generation and Analysis of Sandstone Pore Structure Images Based on CT Scanning and Generative Adversarial Network
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作者 Zhaowei WANG Limin SUO +7 位作者 Hailong LIU Wenlong SU Xianda SUN Likai CUI Yangdong CAO Tao LIU Wenjie YANG Wenying SUN 《Agricultural Biotechnology》 2024年第6期99-101,共3页
In this study,cylindrical sandstone samples were imaged by CT scanning technique,and the pore structure images of sandstone samples were analyzed and generated by combining with StyleGAN2-ADA generative adversarial ne... In this study,cylindrical sandstone samples were imaged by CT scanning technique,and the pore structure images of sandstone samples were analyzed and generated by combining with StyleGAN2-ADA generative adversarial network(GAN)model.Firstly,nine small column samples with a diameter of 4 mm were drilled from sandstone samples with a diameter of 2.5 cm,and their CT scanning results were preprocessed.Because the change between adjacent slices was little,using all slices directly may lead to the problem of pattern collapse in the process of model generation.In order to solve this problem,one slice was selected as training data every 30 slices,and the diversity of slices was verified by calculating the LPIPS values of these slices.The results showed that the strategy of selecting one slice every 30 slices could effectively improve the diversity of images generated by the model and avoid the phenomenon of pattern collapse.Through this process,a total of 295 discontinuous two-dimensional slices were generated for the generation and segmentation analysis of sandstone pore structures.This study can provide effective data support for accurate segmentation of porous medium structures,and simultaneously improves the stability and diversity of generative adversarial network under the condition of small samples. 展开更多
关键词 stylegan2-ADA generative adversarial network Adaptive data augmentation CT scanning Sandstone pore structure
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Generating Cartoon Images from Face Photos with Cycle-Consistent Adversarial Networks 被引量:1
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作者 Tao Zhang Zhanjie Zhang +2 位作者 Wenjing Jia Xiangjian He Jie Yang 《Computers, Materials & Continua》 SCIE EI 2021年第11期2733-2747,共15页
The generative adversarial network(GAN)is first proposed in 2014,and this kind of network model is machine learning systems that can learn to measure a given distribution of data,one of the most important applications... The generative adversarial network(GAN)is first proposed in 2014,and this kind of network model is machine learning systems that can learn to measure a given distribution of data,one of the most important applications is style transfer.Style transfer is a class of vision and graphics problems where the goal is to learn the mapping between an input image and an output image.CYCLE-GAN is a classic GAN model,which has a wide range of scenarios in style transfer.Considering its unsupervised learning characteristics,the mapping is easy to be learned between an input image and an output image.However,it is difficult for CYCLE-GAN to converge and generate high-quality images.In order to solve this problem,spectral normalization is introduced into each convolutional kernel of the discriminator.Every convolutional kernel reaches Lipschitz stability constraint with adding spectral normalization and the value of the convolutional kernel is limited to[0,1],which promotes the training process of the proposed model.Besides,we use pretrained model(VGG16)to control the loss of image content in the position of l1 regularization.To avoid overfitting,l1 regularization term and l2 regularization term are both used in the object loss function.In terms of Frechet Inception Distance(FID)score evaluation,our proposed model achieves outstanding performance and preserves more discriminative features.Experimental results show that the proposed model converges faster and achieves better FID scores than the state of the art. 展开更多
关键词 generative adversarial network spectral normalization Lipschitz stability constraint VGG16 l1 regularization term l2 regularization term Frechet inception distance
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基于光电容积脉搏波的2型糖尿病预测算法研究
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作者 胡鸣瑛 吴全玉 +4 位作者 曹艺凡 曹晋 赵一帆 张琳 刘晓杰 《生物医学工程学杂志》 北大核心 2025年第5期1005-1011,共7页
针对光电容积脉搏波描记法(PPG)数据在2型糖尿病预测中的数据不平衡和数据稀缺问题,提出了一种改进的带有梯度惩罚的条件瓦瑟斯坦生成对抗网络算法(CWGAN-GP)。该算法结合门控循环单元(GRU)网络与自注意力机制构建生成器,用于生成高质量... 针对光电容积脉搏波描记法(PPG)数据在2型糖尿病预测中的数据不平衡和数据稀缺问题,提出了一种改进的带有梯度惩罚的条件瓦瑟斯坦生成对抗网络算法(CWGAN-GP)。该算法结合门控循环单元(GRU)网络与自注意力机制构建生成器,用于生成高质量PPG信号。利用改进的CWGAN-GP等多种数据增强方法扩充PPG数据集,并采用多种分类器进行2型糖尿病预测分析。结果显示,基于改进CWGAN-GP生成数据训练的模型预测性能最优,最高准确率达到0.8950。与其他数据增强方法相比,该方法在精确率和F1分数上均表现出明显优势。生成数据显著提高了2型糖尿病预测模型的准确性和泛化能力,为基于PPG的无创糖尿病早期筛查提供了更可靠的技术支撑。 展开更多
关键词 光电容积脉搏波描记法 2型糖尿病 生成对抗网络 自注意力机制 数据增强
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基于DCGAN和U^(2)-Net模型的齿轮点蚀辨识
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作者 刘妤 谭钦宜 古前程 《振动与冲击》 北大核心 2025年第10期301-310,共10页
结合改建的齿轮试验台能够在线获取齿轮工作齿面图像的优势,探讨了基于机器视觉技术实现齿轮点蚀辨识的方法,并开展了试验研究。针对齿轮点蚀样本稀缺,采用深度卷积生成对抗网络(deep convolutional generative adversarial network,DCG... 结合改建的齿轮试验台能够在线获取齿轮工作齿面图像的优势,探讨了基于机器视觉技术实现齿轮点蚀辨识的方法,并开展了试验研究。针对齿轮点蚀样本稀缺,采用深度卷积生成对抗网络(deep convolutional generative adversarial network,DCGAN),实现了样本的多样化、高质量扩增;结合前期研究基础,提取了齿轮的有效工作齿面,实现了齿面倾斜校正和畸变修正;引入ECA注意力机制,改进了U^(2)-Net模型,实现了齿轮点蚀图像感兴趣区域的精确分割;在此基础上,通过统计齿轮历史点蚀率,构建了基于图像信号的齿轮点蚀辨识模型,实现了齿轮点蚀辨识。结果表明:采用机器视觉技术实现齿轮点蚀辨识的方法是可行的,基于DCGAN和U^(2)-Net模型的齿轮点蚀识别准确率达93.56%。研究成果可为齿轮点蚀辨识提供一种更为直接、可靠的方法,对于机械装备的状态监测有一定的参考价值。 展开更多
关键词 齿轮 点蚀 模式识别 深度卷积生成对抗网络(DCGAN) U^(2)-Net
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A Study on Polyp Dataset Expansion Algorithm Based on Improved Pix2Pix
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作者 Ziji Xiao Kaibo Yang +3 位作者 Mingen Zhong Kang Fan Jiawei Tan Zhiying Deng 《Computers, Materials & Continua》 2025年第2期2665-2686,共22页
The polyp dataset involves the confidentiality of medical records, so it might be difficult to obtain datasets with accurate annotations. This problem can be effectively solved by expanding the polyp data set with alg... The polyp dataset involves the confidentiality of medical records, so it might be difficult to obtain datasets with accurate annotations. This problem can be effectively solved by expanding the polyp data set with algorithms. The traditional polyp dataset expansion scheme usually requires the use of two models or traditional visual methods. These methods are both tedious and difficult to provide new polyp features for training data. Therefore, our research aims to efficiently generate high-quality polyp samples, so as to effectively expand the polyp dataset. In this study, we first added the attention mechanism to the generation model and improved the loss function to reduce the interference caused by reflection in the image generation process. Meanwhile, we used the improved generation model to remove polyps from the original image. In addition, we used masks of different shapes generated by random combinations to generate polyps with more characteristic information. The same generation model was used for the removal and generation of polyps. The generated polyp image has its own annotation, which is conducive to us directly using the expanded data set for training. Finally, we verified the effectiveness of the improved model and the dataset expansion scheme through a series of comparative experiments on the public dataset. The results showed that using the dataset we generate for training can significantly optimize the main performance indicators. 展开更多
关键词 Polyp formation polyp detection image synthesis generative adversarial network Pix2Pix
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Multidimensional data-driven porous media reconstruction:Inversion from 1D/2D pore parameters to 3D real pores
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作者 Peng Chi Jian-Meng Sun +5 位作者 Ran Zhang Wei-Chao Yan Huai-Min Dong Li-Kai Cui Rui-Kang Cui Xin Luo 《Petroleum Science》 2025年第7期2777-2793,共17页
Subsurface rocks,as complex porous media,exhibit multiscale pore structures and intricate physical properties.Digital rock physics technology has become increasingly influential in the study of subsurface rock propert... Subsurface rocks,as complex porous media,exhibit multiscale pore structures and intricate physical properties.Digital rock physics technology has become increasingly influential in the study of subsurface rock properties.Given the multiscale characteristics of rock pore structures,direct three-dimensional imaging at sub-micrometer and nanometer scales is typically infeasible.This study introduces a method for reconstructing porous media using multidimensional data,which combines one-dimensional pore structure parameters with two-dimensional images to reconstruct three-dimensional models.The pore network model(PNM)is stochastically reconstructed using one-dimensional parameters,and a generative adversarial network(GAN)is utilized to equip the PNM with pore morphologies derived from two-dimensional images.The digital rocks generated by this method possess excellent controllability.Using Berea sandstone and Grosmont carbonate samples,we performed digital rock reconstructions based on PNM extracted by the maximum ball algorithm and compared them with stochastically reconstructed PNM.Pore structure parameters,permeability,and formation factors were calculated.The results show that the generated samples exhibit good consistency with real samples in terms of pore morphology,pore structure,and physical properties.Furthermore,our method effectively supplements the micropores not captured in CT images,demonstrating its potential in multiscale carbonate samples.Thus,the proposed reconstruction method is promising for advancing porous media property research. 展开更多
关键词 3D digital rock Pore network model 1D/2D pore parameters Pore structure generative adversarial network
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Image to Image Translation Based on Differential Image Pix2Pix Model 被引量:3
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作者 Xi Zhao Haizheng Yu Hong Bian 《Computers, Materials & Continua》 SCIE EI 2023年第10期181-198,共18页
In recent years,Pix2Pix,a model within the domain of GANs,has found widespread application in the field of image-to-image translation.However,traditional Pix2Pix models suffer from significant drawbacks in image gener... In recent years,Pix2Pix,a model within the domain of GANs,has found widespread application in the field of image-to-image translation.However,traditional Pix2Pix models suffer from significant drawbacks in image generation,such as the loss of important information features during the encoding and decoding processes,as well as a lack of constraints during the training process.To address these issues and improve the quality of Pix2Pixgenerated images,this paper introduces two key enhancements.Firstly,to reduce information loss during encoding and decoding,we utilize the U-Net++network as the generator for the Pix2Pix model,incorporating denser skip-connection to minimize information loss.Secondly,to enhance constraints during image generation,we introduce a specialized discriminator designed to distinguish differential images,further enhancing the quality of the generated images.We conducted experiments on the facades dataset and the sketch portrait dataset from the Chinese University of Hong Kong to validate our proposed model.The experimental results demonstrate that our improved Pix2Pix model significantly enhances image quality and outperforms other models in the selected metrics.Notably,the Pix2Pix model incorporating the differential image discriminator exhibits the most substantial improvements across all metrics.An analysis of the experimental results reveals that the use of the U-Net++generator effectively reduces information feature loss,while the Pix2Pix model incorporating the differential image discriminator enhances the supervision of the generator during training.Both of these enhancements collectively improve the quality of Pix2Pix-generated images. 展开更多
关键词 Image-to-image translation generative adversarial networks U-Net++ differential image Pix2Pix
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基于生成对抗网络的Sentinel-2遥感图像超分辨率分析 被引量:2
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作者 赵慧岩 李云鹤 《计算机应用》 CSCD 北大核心 2022年第S01期298-304,共7页
为了将开放访问的Sentinel-2卫星遥感图像的分辨率提升至商业卫星的水平,提出基于生成对抗网络(GAN)的超分辨率分析方法KN-SRGAN,该方法仅使用开放数据提供的图像,不须高分辨率监督图像,通过核估计和噪声注入构造高-低分辨率图像对训练... 为了将开放访问的Sentinel-2卫星遥感图像的分辨率提升至商业卫星的水平,提出基于生成对抗网络(GAN)的超分辨率分析方法KN-SRGAN,该方法仅使用开放数据提供的图像,不须高分辨率监督图像,通过核估计和噪声注入构造高-低分辨率图像对训练数据集,构建带有感知特征提取器的GAN,实现卫星图像×4倍的超分辨率分析。与残差通道注意力网络(RCAN)、强化深度残差网络(EDSR)、强化超分辨率生成对抗网络(ESRGAN)、退化核超分辨率生成对抗网络(DKN-SR-GAN)等最新方法比较,KN-SRGAN的生成图在直观视觉效果上具有更清晰的细节以及更好的感知效果,无参考图像质量评估指标的定量对比也证明了KN-SRGAN的有效性。 展开更多
关键词 Sentinel-2遥感图像 生成对抗网络 超分辨率分析 核估计 噪声注入
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基于Sentinel-2卫星遥感影像的去云方法研究 被引量:4
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作者 郭保 《测绘与空间地理信息》 2021年第10期150-152,共3页
在光学遥感卫星图像中,云是普遍存在的现象,它严重降低了图像的质量,因此,去云处理就是一个必不可少的步骤。深度神经网络在许多图像处理任务中取得了成功,但是利用该方法针对遥感图像的去云研究较少。本文采用GAN来解决遥感图像去云问... 在光学遥感卫星图像中,云是普遍存在的现象,它严重降低了图像的质量,因此,去云处理就是一个必不可少的步骤。深度神经网络在许多图像处理任务中取得了成功,但是利用该方法针对遥感图像的去云研究较少。本文采用GAN来解决遥感图像去云问题,首先训练生成模型生成无云影像,同时训练判别模型使生成的模型更加真实和清晰,最终达到从被云覆盖的卫星图像中恢复并增强这些区域的信息,生成质量更好的无云图像的目的。基于人工智能标注的Sentinel-2卫星遥感影像数据集的试验表明,与传统的小波变换基准相比,提出的生成对抗网络模型在去云处理方面效果有明显提升。 展开更多
关键词 生成对抗网络 Sentinel-2 遥感影像 去云
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Prediction of the Pore-Pressure Built-Up and Temperature of Fire-Loaded Concrete with Pix2Pix
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作者 Xueya Wang Yiming Zhang +1 位作者 Qi Liu Huanran Wang 《Computers, Materials & Continua》 SCIE EI 2024年第5期2907-2922,共16页
Concrete subjected to fire loads is susceptible to explosive spalling, which can lead to the exposure of reinforcingsteel bars to the fire, substantially jeopardizing the structural safety and stability. The spalling ... Concrete subjected to fire loads is susceptible to explosive spalling, which can lead to the exposure of reinforcingsteel bars to the fire, substantially jeopardizing the structural safety and stability. The spalling of fire-loaded concreteis closely related to the evolution of pore pressure and temperature. Conventional analytical methods involve theresolution of complex, strongly coupled multifield equations, necessitating significant computational efforts. Torapidly and accurately obtain the distributions of pore-pressure and temperature, the Pix2Pix model is adoptedin this work, which is celebrated for its capabilities in image generation. The open-source dataset used hereinfeatures RGB images we generated using a sophisticated coupled model, while the grayscale images encapsulate the15 principal variables influencing spalling. After conducting a series of tests with different layers configurations,activation functions and loss functions, the Pix2Pix model suitable for assessing the spalling risk of fire-loadedconcrete has been meticulously designed and trained. The applicability and reliability of the Pix2Pix model inconcrete parameter prediction are verified by comparing its outcomes with those derived fromthe strong couplingTHC model. Notably, for the practical engineering applications, our findings indicate that utilizing monochromeimages as the initial target for analysis yields more dependable results. This work not only offers valuable insightsfor civil engineers specializing in concrete structures but also establishes a robust methodological approach forresearchers seeking to create similar predictive models. 展开更多
关键词 Fire loaded concrete spalling risk pore pressure generative adversarial network(GAN) Pix2Pix
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基于生成对抗网络(GAN)和NSGA-2遗传算法的汉口滨江居住区采光优化研究 被引量:1
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作者 王孝鑫 李竞一 《建筑技艺》 2021年第9期84-88,共5页
随着人工智能技术在各个领域的广泛运用,越来越多的设计人员开始尝试将人工智能技术的成果运用到城市或建筑设计当中。通过汉口滨江居住区城市数据和人工智能技术控制区域三维模型的合理生成,并对整体区域建筑环境进行环境模拟,达到居... 随着人工智能技术在各个领域的广泛运用,越来越多的设计人员开始尝试将人工智能技术的成果运用到城市或建筑设计当中。通过汉口滨江居住区城市数据和人工智能技术控制区域三维模型的合理生成,并对整体区域建筑环境进行环境模拟,达到居住区布局及造型的优化设计的目的,最后通过优化设计案例为设计师提供设计建议。 展开更多
关键词 深度学习 生成对抗网络 NSGA-2遗传算法 居住区改造 日照模拟 优化设计
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AI-driven generative and reinforcement learning for mechanical optimization of 2D patterned hollow structures
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作者 Yicheng Shan Leitao Cao +4 位作者 Yu Wang Jing Ren Chen Huang Wenli Gao Shengjie Ling 《Materials Futures》 2025年第3期426-442,共17页
2D patterned hollow structures have emerged as advanced materials with exceptional mechanical properties and lightweight characteristics,making them ideal for high-performance applications in aerospace and automotive ... 2D patterned hollow structures have emerged as advanced materials with exceptional mechanical properties and lightweight characteristics,making them ideal for high-performance applications in aerospace and automotive industries.However,optimizing their structural design to achieve uniform stress distribution and minimize stress concentration remains a significant challenge due to the complex interplay between geometric patterns and mechanical performance.In this study,we develop an integrated framework combining conditional generative adversarial networks(cGANs)and deep Q-networks(DQNs)to predict and optimize the stress fields of 2D-PHS.We generated a comprehensive dataet comprising 1000 samples across five distinct density classes using a custom grid pattern generation algorithm,ensuring a wide range of structural variations.The cGAN accurately predicts stress distributions,achieving a high correlation with finite element analysis(FEA)results while reducing computational time from approximately 40 s(FEA)to just 1-2 s per prediction.Concurrently,the DQN optimizes design parameters through scaling and rotation operations,enhancing structural performance based on predicted stress metrics.Our approach resulted in a 4.3%improvement in average stress uniformity and a 23.1%reduction in maximum stress concentration.These improvements were validated through FEA simulations and experimental tensile tests on 3D-printed thermoplastic polyurethane samples.The tensile strength of the optimized samples increased from an initial average of 5.9-6.6 MPa under 100%strain,demonstrating enhanced mechanical resilience.This study demonstrates the efficacy of combining advanced AI techniques for rapid and precise material design optimization,providing a scalable and cost-effective solution for developing superior lightweight materials with tailored mechanical properties for critical engineering applications. 展开更多
关键词 2D patterned hollow structures mechanical property generative adversarial networks deep reinforcement learning
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A Hybrid Deep Learning Multi-Class Classification Model for Alzheimer’s Disease Using Enhanced MRI Images
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作者 Ghadah Naif Alwakid 《Computers, Materials & Continua》 2026年第1期797-821,共25页
Alzheimer’s Disease(AD)is a progressive neurodegenerative disorder that significantly affects cognitive function,making early and accurate diagnosis essential.Traditional Deep Learning(DL)-based approaches often stru... Alzheimer’s Disease(AD)is a progressive neurodegenerative disorder that significantly affects cognitive function,making early and accurate diagnosis essential.Traditional Deep Learning(DL)-based approaches often struggle with low-contrast MRI images,class imbalance,and suboptimal feature extraction.This paper develops a Hybrid DL system that unites MobileNetV2 with adaptive classification methods to boost Alzheimer’s diagnosis by processing MRI scans.Image enhancement is done using Contrast-Limited Adaptive Histogram Equalization(CLAHE)and Enhanced Super-Resolution Generative Adversarial Networks(ESRGAN).A classification robustness enhancement system integrates class weighting techniques and a Matthews Correlation Coefficient(MCC)-based evaluation method into the design.The trained and validated model gives a 98.88%accuracy rate and 0.9614 MCC score.We also performed a 10-fold cross-validation experiment with an average accuracy of 96.52%(±1.51),a loss of 0.1671,and an MCC score of 0.9429 across folds.The proposed framework outperforms the state-of-the-art models with a 98%weighted F1-score while decreasing misdiagnosis results for every AD stage.The model demonstrates apparent separation abilities between AD progression stages according to the results of the confusion matrix analysis.These results validate the effectiveness of hybrid DL models with adaptive preprocessing for early and reliable Alzheimer’s diagnosis,contributing to improved computer-aided diagnosis(CAD)systems in clinical practice. 展开更多
关键词 Alzheimer’s disease deep learning MRI images MobileNetV2 contrast-limited adaptive histogram equalization(CLAHE) enhanced super-resolution generative adversarial networks(ESRGAN) multi-class classification
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基于深层特征嵌入的无人机图像高分辨率重建
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作者 吴晓鹏 王朝 张方锐 《北京测绘》 2025年第7期960-966,共7页
无人机图像采集过程中易受外界环境和自身系统影响,导致图像出现清晰度低、细节信息模糊,以及特征退化明显,难以进行目标识别等问题。因此,提出基于深层特征嵌入的无人机图像高分辨率重建方法。该方法首先利用基于样式的生成对抗网络第... 无人机图像采集过程中易受外界环境和自身系统影响,导致图像出现清晰度低、细节信息模糊,以及特征退化明显,难以进行目标识别等问题。因此,提出基于深层特征嵌入的无人机图像高分辨率重建方法。该方法首先利用基于样式的生成对抗网络第二版(StyleGAN2)作为特征嵌入空间,将无人机图像输入网络,通过逐层提取、控制和训练图像特征,优化并约束图像边缘和细节特征,从而生成高分辨率重建图像。同时,引入损失函数以保留更多原始图像纹理细节信息。实验结果表明,该方法在确保Q相关系数接近最优值的前提下,有效实现了无人机图像的高分辨率重建。 展开更多
关键词 深层特征嵌入 无人机图像 高分辨率重建 基于样式的生成对抗网络第二版(stylegan2) 纹理细节
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基于GAN数据增强的软件缺陷预测聚合模型 被引量:10
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作者 徐金鹏 郭新峰 +1 位作者 王瑞波 李济洪 《计算机科学》 CSCD 北大核心 2023年第12期24-31,共8页
在软件缺陷预测任务中,通常基于C&K等静态软件特征数据集,使用机器学习分类算法来构建软件缺陷预测(SDP)模型。然而,大多数静态软件特征数据集中缺陷数较少,数据集的类不平衡问题较为严重,导致学习到的SDP模型的预测性能较差。文中... 在软件缺陷预测任务中,通常基于C&K等静态软件特征数据集,使用机器学习分类算法来构建软件缺陷预测(SDP)模型。然而,大多数静态软件特征数据集中缺陷数较少,数据集的类不平衡问题较为严重,导致学习到的SDP模型的预测性能较差。文中基于生成对抗网络(GAN),并利用FID得分筛选生成正例样本数据,增强正例样本量,然后在组块正则化m×2交叉验证(m×2BCV)框架下,通过众数投票法聚合多个子模型的结果,最终构成SDP模型。以PROMISE数据库下的20个数据集为实验数据集,采用随机森林算法构建SDP聚合模型。实验结果表明,与传统的随机上采样、SMOTE、随机下采样相比,所提SDP聚合模型的F1平均值分别提高了10.2%,5.7%,3.4%,且F1的稳定性也得到相应提高;所提SDP聚合模型在20个数据集的评测中,有17个F1值最高。从AUC指标来看,所提方法与传统的采样方法没有明显差异。 展开更多
关键词 生成对抗网络 数据增强 组块正则化交叉验证 软件缺陷预测 聚合模型
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基于显著性目标检测网络的面部属性编辑方法 被引量:3
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作者 项家伟 王伟 《国外电子测量技术》 北大核心 2022年第5期1-8,共8页
针对面部属性编辑方法存在生成图像视觉效果差和图像多样性少的问题,提出了在Trans-GAN的基础上融合显著性目标检测网络(U^(2)-Net)的面部属性编辑方法。首先,该方法在Trans-GAN的基础上融合U^(2)-Net特征提取器作为编码器结构,提高网... 针对面部属性编辑方法存在生成图像视觉效果差和图像多样性少的问题,提出了在Trans-GAN的基础上融合显著性目标检测网络(U^(2)-Net)的面部属性编辑方法。首先,该方法在Trans-GAN的基础上融合U^(2)-Net特征提取器作为编码器结构,提高网络对面部空间信息的提取能力;其次,Trans-GAN采用两级鉴别器,使得网络能在原始图像上捕获更多的细节信息和语义信息,生成细粒度的面部属性;最后,提出一种数据增样方式(CAR),该数据增样方式能在丰富原有数据集的同时增加面部图像属性多样性。在CelebAMask-HQ原始数据集上验证表明,与现有面部属性编辑方法相比,提出的方法不仅能准确的编辑细粒度属性区域,而且能大幅度提高面部图像质量。 展开更多
关键词 面部属性编辑 U^(2)-Net 生成对抗网络 编码器
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Feature-Grounded Single-Stage Text-to-Image Generation 被引量:1
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作者 Yuan Zhou Peng Wang +1 位作者 Lei Xiang Haofeng Zhang 《Tsinghua Science and Technology》 SCIE EI CAS CSCD 2024年第2期469-480,共12页
Recently,Generative Adversarial Networks(GANs)have become the mainstream text-to-image(T2I)framework.However,a standard normal distribution noise of inputs cannot provide sufficient information to synthesize an image ... Recently,Generative Adversarial Networks(GANs)have become the mainstream text-to-image(T2I)framework.However,a standard normal distribution noise of inputs cannot provide sufficient information to synthesize an image that approaches the ground-truth image distribution.Moreover,the multistage generation strategy results in complex T2I applications.Therefore,this study proposes a novel feature-grounded single-stage T2I model,which considers the“real”distribution learned from training images as one input and introduces a worst-case-optimized similarity measure into the loss function to enhance the model's generation capacity.Experimental results on two benchmark datasets demonstrate the competitive performance of the proposed model in terms of the Frechet inception distance and inception score compared to those of some classical and state-of-the-art models,showing the improved similarities among the generated image,text,and ground truth. 展开更多
关键词 text-to-image(T2I) feature-grounded single-stage generation generative adversarial network(GAN)
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古铜镜X光生成对抗融合中的优化策略 被引量:1
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作者 吴萌 王姣 相建凯 《激光与光电子学进展》 CSCD 北大核心 2023年第2期456-465,共10页
锈蚀覆盖的古铜镜在非接触探伤检测中,因镜缘与镜心厚度各异,X光成像无法呈现完整的病害信息。以古铜镜X光信号为输入,搭建生成对抗融合网络。针对L_(2)损失和梯度算子所导致的重构模糊、纹饰和裂痕等多尺度特征细节表达等问题,设计了... 锈蚀覆盖的古铜镜在非接触探伤检测中,因镜缘与镜心厚度各异,X光成像无法呈现完整的病害信息。以古铜镜X光信号为输入,搭建生成对抗融合网络。针对L_(2)损失和梯度算子所导致的重构模糊、纹饰和裂痕等多尺度特征细节表达等问题,设计了能够增强古铜镜X光信息融合效果的优化策略。通过添加L_(2,1/2)损失正则化生成器的特征学习过程,改善L_(2)损失生成信息平滑的现象;定义拉普拉斯L_(tex)纹饰损失,加强训练网络对纹饰和病害的抽取效果;在训练网络中加入多尺度特征融合模块,提高细节信息生成质量。通过与7种融合方法进行实验对比,所提算法在5组对照数据中仅2组的交叉熵值略差,其余信息熵、平均梯度、空间频率、联合熵和非参考特征互信息值均取得最优,可有效呈现古铜镜X光探伤检测信息。 展开更多
关键词 X光图像 生成对抗网络 多尺度融合 L_(2 1/2)稀疏 拉普拉斯算子
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