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基于YOLOP-L的多特征融合道路全景驾驶检测

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计算机科学 2024年第S1期51卷 433-440页

作者：吕嘉璐周力巨永锋长安大学电子与控制工程学院西安710064

目前,驾驶员视角下的交通图像检测技术成为交通领域的重要研究方向,同时提取车辆、道路、交通标志等多种特征已经成为驾驶员理解道路信息多样性的亟需任务。以往研究已在单类目标检测的特征提取方面取得了长足进步,然而,这些研究不能很... 详细信息

目前,驾驶员视角下的交通图像检测技术成为交通领域的重要研究方向,同时提取车辆、道路、交通标志等多种特征已经成为驾驶员理解道路信息多样性的亟需任务。以往研究已在单类目标检测的特征提取方面取得了长足进步,然而,这些研究不能很好地联合应用于其他区别较大的特征检测任务中,且融合训练过程中会损失个别特征检测的精度。针对驾驶员视野范围内道路信息多样且复杂的特点,本文提出了一种基于多特征融合训练的检测模型YOLOP-L,它能够同时对多种不同特征交通目标进行融合训练,同时保证单项检测任务的精度。首先,为了解决特征融合中语义信息表达不完整的问题,设计的SP-LNet模块通过FPN与双向特征网络结合实现网络更深层次的融合,使得提取的信息更完整,从而提升道路小目标的检测性能;其次,设计新的分割头深度可分离卷积,将语义信息与局部特征融合促使多特征融合的训练准确度与速度得到进一步提升;再次,体系中设计的GDL-Focal多类混合损失函数更专注于困难样本,可用于解决样本特征不平衡的问题。最后,对比实验表明:YOLOP-L相比原YOLOP网络运行的速度更快;在车辆目标检测任务下召回率提升了2.2%;在车道线检测任务下准确率提升2.8%,车道线IoU的值较HybridNets网络下降2.45%,但较YOLOP-L网络提升1.95%;在可行驶区域分割任务下其整体检测性能提升1.1%。结果表明,在具有挑战性的BDD100K数据集上,YOLOP-L可以在复杂场景下有效解决检测精度不足和分割缺失的问题,提高了车辆识别、车道线检测以及道路行驶区域联合训练的准确性和鲁棒性。

关键词：全景驾驶多特征融合车辆检测可行驶区域检测车道线检测双向特征金字塔

Advances in Science and Engineering II

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Fabrication of porous adsorbents from eco-friendly aqueous foam for high-efficient removal of cationic dyes and sustainable utilization assessment

丛书名： Applied Mechanics and Materials, v. 135-136

2012年

作者： ju, yongfeng Qiu, Robin G. World Association of Science Engineering

Selected, peer reviewed papers from the 2011 WASE Global Conference on Science Engineering (GCSE 2011), December 10-11, 2011, Taiyuan & Xian, China

ISBN: (纸本)9783037852903;9783038137191

Selected, peer reviewed papers from the 2011 WASE Global Conference on Science Engineering (GCSE 2011), December 10-11, 2011, Taiyuan & Xian, China

关键词： Materials science--Technological innovations Engineering--Congresses

来源：畅想之星图书光盘版（南... 评论

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畅想之星图书光盘版（南通市图书馆镜像）

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Journal of Environmental Sciences 2024年第3期137卷 395-406页

作者： Fangzhi Duan yongfeng Zhu Yan Liu Aiqin Wang Key Laboratory of Clay Mineral Applied Research of Gansu Province Center of Eco-material and Green ChemistryLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Porous materials applied in environmental remediation have received researchers'extensive attention recently,but the related green and convenient preparation method is rarely ***,we recommended a green and convenient strategy for the fabrication of porous material via aqueous foam templates,which was synergistically stabilized by Codonopsis pilosula(CP)and clay minerals of attapulgite(APT).The characterization results revealed that the APT was modified by organic molecules leached from CP and anchored at the air-water interface,which improved the foam stability *** novel porous material of polyacrylamide/Codonopsis pilosula/attapulgite(PAM/CP/APT)templated from the aqueous foam via a polymerization reaction had excellent adsorption capacity for the cationic dyes methyl violet(MV)and methylene blue(MB),and the adsorption capacity can reach 755.85 mg/g and557.64 mg/g,*** importantly,the adsorption capacity of spent adsorbent material was still over 200 mg/g after being recycled five times through a simple carbonization process,and then it was added to the plant pot,the total biomass was increased by about86.42%.This study provided a green and sustainable pathway for the preparation,application and subsequent processing of porous materials.

关键词： Porous material Aqueous foam Atapulgite Adsorption Cationic dyes Sustainable utilization

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保持覆盖的无线传感器网络簇内节点调度方法

计算机工程与应用 2011年第15期47卷 12-14页

作者：包旭巨永锋长安大学电子与控制工程学院西安710064

为了延长无线传感器网络的生命周期,提高节点能量利用效率,将簇与节点调度相结合,提出了保持覆盖的无线传感器网络簇内节点调度。首先将网络分簇,然后每个簇内的节点,按节点号自小到大的顺序依次计算每个节点与簇内邻居节点的距离,并判... 详细信息

为了延长无线传感器网络的生命周期,提高节点能量利用效率,将簇与节点调度相结合,提出了保持覆盖的无线传感器网络簇内节点调度。首先将网络分簇,然后每个簇内的节点,按节点号自小到大的顺序依次计算每个节点与簇内邻居节点的距离,并判断所有距离小于监测半径的邻居节点能否对自己实现圆周覆盖,从而判断自己是否是冗余节点。利用Matlab仿真表明,一方面该算法可以有效减少网络的能量消耗,延长网络生命周期;另一方面该算法的调度效率与网络节点密度以及节点监测半径都有密切关系。

关键词：无线传感器网络覆盖分簇节点调度

Joint fuzzy background and adaptive foreground model for moving target detection

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Frontiers of Computer Science 2024年第2期18卷 93-106页

作者： Dawei ZHANG Peng WANG yongfeng DONG Linhao LI Xin LI School of Artificial Intelligence Hebei University of TechnologyTianjin 300401China Lane Department of Computer Science and Electrical Engineering West Virginia UniversityMorgantownWV 26506-6109USA

Moving target detection is one of the most basic tasks in computer *** conventional wisdom,the problem is solved by iterative optimization under either Matrix Decomposition(MD)or Matrix Factorization(MF)*** utilizes foreground information to facilitate background *** uses noise-based weights to fine-tune the *** both noise and foreground information contribute to the recovery of the *** jointly exploit their advantages,inspired by two framework complementary characteristics,we propose to simultaneously exploit the advantages of these two optimizing approaches in a unified framework called Joint Matrix Decomposition and Factorization(JMDF).To improve background extraction,a fuzzy factorization is *** fuzzy membership of the background/foreground association is calculated during the factorization process to distinguish their contributions of both to background *** describe the spatio-temporal continuity of foreground more accurately,we propose to incorporate the first order temporal difference into the group sparsity constraint *** temporal constraint is adjusted *** foreground and the background are jointly estimated through an effective alternate optimization process,and the noise can be modeled with the specific probability *** experimental results of vast real videos illustrate the effectiveness of our *** with the current state-of-the-art technology,our method can usually form the clearer background and extract the more accurate ***-noise experiments show the noise robustness of our method.

关键词： matrixdecomposition matrix factorization generalized sparsity noise modeling

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基于条件先验人体模型的人体姿态估计

计算机工程与应用 2018年第16期54卷 24-29页

作者：赵勇巨永锋长安大学电子与控制工程学院西安710064 西安邮电大学自动化学院西安710121

人体姿态估计算法中的人体模型是对人体部位或关节间外观和空间关联情况的数学描述。虽然当前已经有部分人体模型在建立时考虑到了部位或关节的空间定位会满足一定的先验分布,但却都将基于同样先验分布建立的人体模型用于不同待处理图... 详细信息

人体姿态估计算法中的人体模型是对人体部位或关节间外观和空间关联情况的数学描述。虽然当前已经有部分人体模型在建立时考虑到了部位或关节的空间定位会满足一定的先验分布,但却都将基于同样先验分布建立的人体模型用于不同待处理图片进行人体姿态估计,并没有考虑到不同图片中的实际定位对先验分布服从程度的不同。为此,提出了一种基于条件先验的人体模型,在人体模型中添加自适应调节参数,参数值根据待处理图片中关节可能定位与外观模型相似度的大小来确定,从而达到根据待处理图片自适应调节先验分布在计算关节定位概率时所起作用大小的目的。将基于条件先验的人体模型用于人体姿态估计,仿真实验表明,与现有基于先验的人体模型相比,所提人体模型用于人体姿态估计时获得了更高的估计准确度。

关键词：人体姿态估计人体模型条件先验自适应调节参数

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改进的多通道循环结构跟踪

计算机辅助设计与图形学学报 2016年第3期28卷 456-463页

作者：田浩孟凡琨巨永锋杜凯长安大学电子与控制工程学院西安710064

为了进一步提高多通道循环结构跟踪算法的鲁棒性,提出适用于线性和非线性条件的一种通用多通道关联滤波器(MCF).首先从时域入手推导得到MCF的通用形式;在此基础上,依靠线性核和高斯核函数分别得到线性和非线性条件下MCF最常用的两种形式... 详细信息

为了进一步提高多通道循环结构跟踪算法的鲁棒性,提出适用于线性和非线性条件的一种通用多通道关联滤波器(MCF).首先从时域入手推导得到MCF的通用形式;在此基础上,依靠线性核和高斯核函数分别得到线性和非线性条件下MCF最常用的两种形式.通过HOG这种多通道特征因子,在视频序列上进行实验.结果表明,在线性条件下,文中方法与频域法相比鲁棒性大致相同;在非线性条件下,该方法比现有方法具有更强的鲁棒性.

关键词：循环结构跟踪多通道关联滤波器线性条件非线性条件时域

Oral delivery of ferroptosis inducers for effective treatment of hepatic fibrosis

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Nano Research 2024年第8期17卷 7621-7630页

作者： Yinglan Yu Shunlong Zhang yongfeng Xu Hao Shao Lei Luo College of Pharmaceutical Sciences Southwest UniversityChongqing 400715China

Liver fibrosis is characterized by the excessive accumulation of extracellular matrix(ECM),which is primarily produced by activated hepatic stellate cells(HSCs).However,effective therapies for hepatic fibrosis are currently *** is a promising anti-fibrotic drug candidate,but its clinical application is hindered by limited ***,we present a novel oral delivery platform that enhances the HSCs uptake of artesunate and induces potent *** platform is vitamin Adecorated nanoparticles encapsulated with *** multifunctional ligand vitamin A interacts with retinol-binding proteins that are highly expressed on the intestinal epithelium to promote transcytosis,highly expressed on the surface of HSCs but lowly expressed in normal *** oral administration,this oral delivery platform enhances transepithelial transport in the intestine,improves drug accumulation in the liver,and continuously increases HSCs uptake of *** drug release in HSCs,artesunate depletes glutathione peroxidase 4 and glutathione,effectively initiating *** vivo experiments demonstrate that this strategy induces pronounced ferroptosis,efficiently relieving liver *** work provides a proof-ofconcept demonstration that an oral delivery strategy for ferroptosis inducers may be beneficial for liver fibrosis treatment.

关键词： liver fibrosis hepatic stellate cells oral delivery intestinal epithelium ferroptosis

Fundamentals and progress of the manifold method based on independent covers

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Science China(Technological Sciences) 2024年第4期67卷 966-991页

作者： SU HaiDong LIN ShaoZhong XIE ZhiQiang GONG YaQi QI yongfeng Material and Engineering Structure Department Yangtze River Scientific Research InstituteWuhan 430010China Research Center of Water Engineering Safety and Disaster Prevention of Ministry of Water Resources Wuhan 430010China

Aiming to solve mesh generation,computational stability,accuracy control,and other problems encountered with existing numerical methods,such as the finite element method and the finite volume method,a new numerical computational method for continuum mechanics,namely the manifold method based on independent covers(MMIC),is proposed based on the concept of mathematical manifolds,to form partitioned series solutions of partial differential *** partitions,the cover meshes have the characteristics of arbitrary shape,arbitrary connection,and arbitrary *** are expected to fundamentally solve the mesh generation problem and can also simulate the precise geometric boundaries of the CAD model and strictly impose boundary *** the selection of series solutions,local analytical solutions(such as series solutions at crack tips and series solutions in infinite domains)or proper forms of complete series can be used to reflect the local or global characteristics of the physical field to accelerate *** applications are presented.A new method of beam,plate,and shell analysis is *** deformation characteristics of beams,plates,and shells are simulated with polynomial series of suitable forms,and the analysis of curved beams and shells with accurate geometric representation is *** the static elastic analysis of two-dimensional structures,a mesh splitting algorithm is proposed,and h-p version adaptive analysis is carried out with error ***,automatic computation integrated with CAD is *** analysis is also attempted for the solution of differential equations of *** the one-dimensional convection-diffusion equation and Burgers equation,calculation results with high precision are obtained in strong convection and shock wave simulations,avoiding nonphysical *** solving the two-dimensional incompressible Navier-Stokes equation is also *** series solution formula is used to o

关键词： series solutions mesh generation adaptive analysis fixed meshes numerical manifold method