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PROJECTION LINKAGE BETWEEN HEGU ACUPOINT AND STN
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作者 孟卓 吕国蔚 《World Journal of Acupuncture-Moxibustion》 1998年第1期33-36,共4页
Alternative stimulation of both the solitary tract nucleus (STN) and Hegu (HG) acupoint were made on the sodium pentobarbital anesthetized rats. The intracellular microelectrode recordings from the spinal drosal horn ... Alternative stimulation of both the solitary tract nucleus (STN) and Hegu (HG) acupoint were made on the sodium pentobarbital anesthetized rats. The intracellular microelectrode recordings from the spinal drosal horn of C5 - T1 segments were used to search and identify the spinal neurons. A total of 53 neurons responding to the stimulation of both STN and HG was recorded intracellularly. 24 and 29 of them were found to antidromically and synaptically respond to the stimulation of STN, respectively. These neurons were mainly distributed in the laminae III - Vl of spinal dorsal horn. The results indicate that (i) some spinal neurons can receive somatic afferent inputs from HG and convey them to the visceral sensory nucleus - STN; (ii) the other spinal neurons receive afferent impulse from both the STN and HG; (iii) the convergence and integration between somatic and visceral sensory inputs might occur in these spinal neurons and STN. 展开更多
关键词 SOLITARY TRACT nucleus hegu point Spinal PROJECTION neurons Intracellular recordings
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Clinical efficacy of HEGU needling method combined with tendon-stretching and plucking massage on trigger point in the treatment of acute thoracodorsal myofascitis
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作者 Guang-Bao Lu Rong-Jun Mei +3 位作者 Wen-Qiang Shi Hai-Zhou Liu Jing-Wen Huang Xue-Bo Li 《Journal of Hainan Medical University》 2019年第5期49-52,共4页
Objective:To observe the effect of Hegu neediling method combined with tendon-stretching and plucking massage on trigger point in the treatment of acute thoracodorsal myofascitis. Methods: A total of 84 patients with ... Objective:To observe the effect of Hegu neediling method combined with tendon-stretching and plucking massage on trigger point in the treatment of acute thoracodorsal myofascitis. Methods: A total of 84 patients with acute thoracodorsal myofascitis who met the diagnostic and inclusion criteria were assigned into the treatment group and the control group randomly, the treatment group was treated with Hegu neediling method combined with tendon-stretching and plucking massage, while the control group was treated with conventional electroacupuncture. Two groups of patients were treated for two weeks. VAS score and ODI were compared before treatment, after the first treatment and after the treatment course, and the clinical efficacy was evaluated after treatment.Results: The total effective rates of the treatment group and the control group were 97.62% and 80.95%, respectively. The treatment group was significantly better than the control group. The VAS and ODI scores of the treatment group decreased after the first treatment and the end of the treatment, and the treatment group was significantly better than the control group.Conclusion:Hegu neediling method combined with tendon-stretching and plucking massage can relieve pain and improve limb dysfunction in patients with acute thoracodorsal myofascitis. 展开更多
关键词 hegu neediling method Tendon-stretching and PLUCKING MASSAGE ACUTE thoracodorsal MYOFASCITIS Clinical efficacy
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PT-MFR:一种基于Point Transformer的CAD模型加工特征识别方法
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作者 何皓辰 方正 +2 位作者 卢政达 肖俊 王颖 《中国科学院大学学报(中英文)》 北大核心 2026年第1期115-124,共10页
加工特征识别在计算机辅助设计(CAD)和制造(CAM)中至关重要,是连接CAD和CAM系统的重要环节。研究者们提出了基于规则和基于学习的2类加工特征识别方法,其中基于学习的方法表现更出色且备受关注。然而,现有识别方法面临着几何信息利用不... 加工特征识别在计算机辅助设计(CAD)和制造(CAM)中至关重要,是连接CAD和CAM系统的重要环节。研究者们提出了基于规则和基于学习的2类加工特征识别方法,其中基于学习的方法表现更出色且备受关注。然而,现有识别方法面临着几何信息利用不足、加工特征定位不精准、实例分割过程复杂等挑战。针对这些问题,提出PT-MFR,一种基于Point Transformer的CAD模型加工特征识别方法,它执行语义分割和实例分割2个任务,分别预测模型每个面的加工特征语义类别并计算面相似度以分割加工特征实例,综合2个任务得到加工特征识别结果。实验结果表明,提出的方法性能优于现有的其他方法。 展开更多
关键词 加工特征识别 点云 神经网络 point Transformer
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基于改进PointNet++的服装点云分割与边界优化
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作者 徐诗琦 马玲 +2 位作者 林熹妍 潘怡婷 邹奉元 《现代纺织技术》 北大核心 2026年第2期90-98,共9页
人体与服装及服装不同部位之间的边界区域常包含复杂几何特征与变化,使得三维点云场景分割方法在进行服装提取时边界分割效果较差,进而影响整体精度。为了提高服装点云分割精度,提出一种融合边界识别的改进PointNet++模型,以提高边界区... 人体与服装及服装不同部位之间的边界区域常包含复杂几何特征与变化,使得三维点云场景分割方法在进行服装提取时边界分割效果较差,进而影响整体精度。为了提高服装点云分割精度,提出一种融合边界识别的改进PointNet++模型,以提高边界区域的分割性能。首先,对输入三维服装点云数据进行初步分割。接着,在初始部件分割结果的基础上,设计基于K邻近算法的边界识别模块并嵌入PointNet++模型,以对初步分割边界进行针对性训练。最后,利用优化后的局部区域提高三维服装的整体分割精度。结果表明:改进PointNet++模型方法在边界区域的总体精度与平均交并比分别为87.37%与86.68%,比基线方法分别提升了32.74%、34.25%。整体区域的总体精度与平均交并比分别为93.53%与92.84%,比基线方法分别提升了1.19%、0.89%。研究方法可显著提升三维服装边界分割精度,为三维服装提取提供技术参考。 展开更多
关键词 三维服装提取 三维点云 pointNet++ 点云分割 边界优化
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基于3DGP-PointRCNN的道路场景三维点云小目标检测
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作者 李洪涛 徐平平 +2 位作者 甘鹏明 孙士阳 张文兴 《现代电子技术》 北大核心 2026年第5期193-198,共6页
在自动驾驶场景中,检测远距离目标和小目标(如行人和骑行者)时,因其尺寸较小、形状复杂和点云稀疏,检测难度显著增加。为此,文中提出一种改进的三维目标检测方法(3DGP-PointRCNN)。该方法基于PointRCNN,首先,在特征提取阶段引入全局分... 在自动驾驶场景中,检测远距离目标和小目标(如行人和骑行者)时,因其尺寸较小、形状复杂和点云稀疏,检测难度显著增加。为此,文中提出一种改进的三维目标检测方法(3DGP-PointRCNN)。该方法基于PointRCNN,首先,在特征提取阶段引入全局分组坐标注意力(GGCA)模块,结合全局上下文信息和局部特征,通过加权融合的方式减少无关点的影响,提升网络对关键目标区域的关注能力;其次,基于PnP3D重新构建网络架构,通过K近邻搜索与全局双线性正则化方法,对点云局部邻域特征与全局特征进行深度融合,增强网络对目标形状和位置的精细建模能力;最后,基于KITTI数据集进行了实验对比。实验结果表明,改进后的网络模型相比基准网络,在困难级别下行人和骑行者的检测精度分别提升了1.83%和4.17%,汽车的检测精度提升了0.46%,特别是在小目标的检测精度上,所提方法的性能得到显著提升。 展开更多
关键词 三维目标检测 点云 pointRCNN 注意力机制 小目标检测 PnP3D
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Exceptional point-induced knot structure transformations in non-Abelian braids
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作者 Lin-Sheng Bao Jia-Yun Ning +5 位作者 Ao-Qian Shi Peng Peng Zhen-Nan Wang Chao Peng Shuang-Chun Wen Jian-Jun Liu 《Chinese Physics B》 2026年第1期212-217,共6页
The strong connection between braids and knots provides valuable insights into studying the topological state and phase classification of various physical systems.The phenomenon of non-Hermitian(NH)two-and three-band ... The strong connection between braids and knots provides valuable insights into studying the topological state and phase classification of various physical systems.The phenomenon of non-Hermitian(NH)two-and three-band braiding has received widespread attention.However,a systematic exploration and visualization of non-Abelian braiding and the associated knot transformations in four-band systems remains unexplored.Here,we propose a theoretical model of NH four-band braiding,provide its phase diagram,and establish its trivial,Abelian,and non-Abelian braiding rules.Additionally,we report on special knots,such as the Hopf and Solomon links in braided knots,and reveal that their transformations are accompanied by and mediated through exceptional points.Our work provides a detailed case for studying NH multiband braiding and knot structures in four-band systems,which could offer insights for topological photonics and analog information processing applications. 展开更多
关键词 exceptional point knot structures phase transitions non-Abelian braids
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Ultrastructure and key identification points of fossilized Os Draconis in traditional Chinese medicine
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作者 Dong-Han Bai Zi Xing +5 位作者 Zi-Hao Zhang Zhi-Jie Zhang Da-Jun Lu Nan-Xi Huang Qiao-Chu Wang Lu Luo 《Traditional Medicine Research》 2026年第1期39-46,共8页
Background:The medicinal material known as Os Draconis(Longgu)originates from fossilized remains of ancient mammals and is widely used in treating emotional and mental conditions.However,fossil resources are nonrenewa... Background:The medicinal material known as Os Draconis(Longgu)originates from fossilized remains of ancient mammals and is widely used in treating emotional and mental conditions.However,fossil resources are nonrenewable,and clinical demand is increasingly difficult to meet,leading to a proliferation of counterfeit products.During prolonged geological burial,static pressure from the surrounding strata severely compromises the microstructural integrity of osteons in Os Draconis,but Os Draconis still largely retains the structural features of mammalian bone.Methods:Using verified authentic Os Draconis samples over 10,000 years old as a baseline,this study summarizes the ultrastructural characteristics of genuine Os Draconis.Employing electron probe microanalysis and optical polarized light microscopy,we examined 28 batches of authentic Os Draconis and 31 batches of counterfeits to identify their ultrastructural differences.Key points for ultrastructural identification of Os Draconis were compiled,and a new identification approach was proposed based on these differences.Results:Authentic Os Draconis exhibited distinct ultrastructural markers:irregularly shaped osteons with traversing fissures,deformed/displaced Haversian canals,and secondary mineral infill(predominantly calcium carbonate).Counterfeits showed regular osteon arrangements,absent traversal fissures,and homogeneous hydroxyapatite composition.Lab-simulated samples lacked structural degradation features.EPMA confirmed calcium carbonate infill in fossilized Haversian canals,while elemental profiles differentiated lacunae types(void vs.mineral-packed).Conclusion:The study established ultrastructural criteria for authentic Os Draconis identification:osteon deformation,geological fissures penetrating bone units,and heterogenous mineral deposition.These features,unattainable in counterfeits or modern processed bones,provide a cost-effective,accurate identification method.This approach bridges gaps in TCM material standardization and supports quality control for clinical applications. 展开更多
关键词 Os Draconis ULTRASTRUCTURE identification points electron probe polarized light microscope
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Federated Dynamic Aggregation Selection Strategy-Based Multi-Receptive Field Fusion Classification Framework for Point Cloud Classification
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作者 Yuchao Hou Biaobiao Bai +3 位作者 Shuai Zhao Yue Wang Jie Wang Zijian Li 《Computers, Materials & Continua》 2026年第2期1889-1918,共30页
Recently,large-scale deep learning models have been increasingly adopted for point cloud classification.However,thesemethods typically require collecting extensive datasets frommultiple clients,which may lead to priva... Recently,large-scale deep learning models have been increasingly adopted for point cloud classification.However,thesemethods typically require collecting extensive datasets frommultiple clients,which may lead to privacy leaks.Federated learning provides an effective solution to data leakage by eliminating the need for data transmission,relying instead on the exchange of model parameters.However,the uneven distribution of client data can still affect the model’s ability to generalize effectively.To address these challenges,we propose a new framework for point cloud classification called Federated Dynamic Aggregation Selection Strategy-based Multi-Receptive Field Fusion Classification Framework(FDASS-MRFCF).Specifically,we tackle these challenges with two key innovations:(1)During the client local training phase,we propose a Multi-Receptive Field Fusion Classification Model(MRFCM),which captures local and global structures in point cloud data through dynamic convolution and multi-scale feature fusion,enhancing the robustness of point cloud classification.(2)In the server aggregation phase,we introduce a Federated Dynamic Aggregation Selection Strategy(FDASS),which employs a hybrid strategy to average client model parameters,skip aggregation,or reallocate local models to different clients,thereby balancing global consistency and local diversity.We evaluate our framework using the ModelNet40 and ShapeNetPart benchmarks,demonstrating its effectiveness.The proposed method is expected to significantly advance the field of point cloud classification in a secure environment. 展开更多
关键词 point cloud classification federated learning multi-receptive field fusion dynamic aggregation
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Exploring the mechanism of myofascial trigger points deactivation by Tuina via the TGF-β1/Smad3 signaling pathway
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作者 Liya Tang Xiaowei Liu +4 位作者 Jiadong Zang Yuqiao Zhang Xiang Feng Wu Li Jiangshan Li 《Digital Chinese Medicine》 2026年第1期103-113,共11页
Objective To investigate whether Tuina alleviates fibrotic symptoms in myofascial trigger points(MTrPs)by regulating transforming growth factor(TGF)-β1/Smad3 signaling pathway,thereby deactivating these points.Method... Objective To investigate whether Tuina alleviates fibrotic symptoms in myofascial trigger points(MTrPs)by regulating transforming growth factor(TGF)-β1/Smad3 signaling pathway,thereby deactivating these points.Methods This study comprised two experimental phases.In phase 1,27 specific pathogenfree(SPF)grade female Sprague-Dawley(SD)rats were randomized into three groups:control 1,model 1,and Tuina 1 groups.Model 1 and Tuina 1 groups underwent an 8-week MTrPs modeling protocol involving blunt impact and eccentric exercise.After successful modeling,rats in Tuina 1 group received manual pressing on nodules or cord-like taut bands on the medial aspect of the left hindlimb.Pain sensitivity and tissue stiffness were evaluated via pressure pain threshold(PPT)and soft tissue tension(STT).Muscle histopathology and fibrosis were observed using hematoxylin and eosin(HE)and Masson staining.Inflammatory factors in muscle were measured by enzyme-linked immunosorbent assay(ELISA),while immunofluorescence(IF)and Western blot(WB)were used to detect the expression levels ofα-smooth muscle actin(α-SMA),collagenⅢ,and TGF-β1.In phase 2,45 SPF female SD rats were randomized into five groups:control 2,model 2,Tuina 2,TGF-β1 inhibitor(TI),and Tuina+TGF-β1 agonist(Tuina+TA)groups.All groups except control 2 underwent standardized MTrPs modeling.Rats in Tuina 2 group received consistent pressing manipulation.TI group received intraperitoneal injections of oxymatrine,while Tuina+TA group received intraperitoneal injections of SRI-011381 hydrochloride followed by the same pressing protocol as Tuina 2 group.WB was used to detect the expression of collagen I,collagen III,TGF-β1,and phosphorylated-Smad3(p-Smad3)/Smad3.Results In phase 1,Tuina significantly improved PPT and STT in MTrPs of rats(P<0.01),reversed pathological damages including disorganized muscle fiber arrangement,abnormal myocyte morphology,and exacerbated fibrosis.In addition,in MTrPs of rats in model 1 group,expression levels of nuclear factor kappa-light-chain-enhancer of activated B cells(NF-κB),interleukin(IL)-1β,IL-6,tumor necrosis factor(TNF)-α,and fibrosis markers(α-SMA,collagen I,and collagen III)were upregulated,and all exhibited a significant downward trend after Tuina intervention(P<0.05 or P<0.01).This indicates that the therapeutic effects of Tuina are directly associated with reduced local inflammation and fibrosis in MTrPs.In phase 2,compared with model 2 group,rats in TI and Tuina 2 groups had decreased expression levels of TGF-β1 and p-Smad3/Smad3 in MTrPs,alongside reduced levels of inflammatory factors(IL-1β,IL-6,NF-κB,and TNF-α)and fibrosis markers(α-SMA,collagen I,and collagen III)(P<0.05 or P<0.01).When co-administered with TGF-β1 agonist,the therapeutic effects of Tuina were significantly attenuated,with rebounded TGF-β1 expression and p-Smad3/Smad3 in local MTrPs,and fibrosis and inflammatory responses were re-exacerbated(P<0.05 or P<0.01).Conclusion Tuina can effectively reduce inflammatory responses and fibrosis in MTrPs tissue,and its mechanism is closely related to the inhibition of the TGF-β1/Smad3 signaling pathway,which plays a critical role in Tuina-mediated regulation of MTrPs fibrosis. 展开更多
关键词 TUINA PRESSING Inflammation Myofascial trigger points FIBROSIS TGF-Β1 p-Smad3
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Advancing Plasmodium vivax malaria treatment in India:The vital role of glucose 6-phosphate dehydrogenase point-of-care tests
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作者 Nitika Nitika Praveen Kumar Bharti 《Asian Pacific Journal of Tropical Medicine》 2026年第2期49-50,共2页
For India to achieve elimination by 2030,the challenges posed by Plasmodium(P.)vivax cannot be overlooked owing to its burden and unique biology.In 2023,in India,about 224000 malaria cases were reported,and a signific... For India to achieve elimination by 2030,the challenges posed by Plasmodium(P.)vivax cannot be overlooked owing to its burden and unique biology.In 2023,in India,about 224000 malaria cases were reported,and a significant proportion(40%)were P.vivax cases.In P.vivax infection,the persistence of dormant liver stage of parasite,i.e.,hypnozoites,leading to relapses weeks or months later poses challenge in its elimination. 展开更多
关键词 plasmodium vivax elimination hypnozoites RELAPSES point care tests malaria treatment glucose phosphate dehydrogenase dormant liver stage
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Point-of-care antigen detection for porcine deltacoronavirus:Colloidal gold and fluorescent immunochromatographic test strips
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作者 Zezhao Cao Junchao Shi +9 位作者 Ruijie Hu Jun Xue Gaili Wang Zi Li Huabo Yu Wei Liu Wenqi He Hualei Wang Haili Zhang Yungang Lan 《Journal of Integrative Agriculture》 2026年第1期394-397,共4页
Highlights By conjugating the same anti-N monoclonal antibody(mAb4-mAb1)with colloidal gold or fluorescent microspheres,this study developed two rapid point-of-care antigen immunochromatographic strips for the detecti... Highlights By conjugating the same anti-N monoclonal antibody(mAb4-mAb1)with colloidal gold or fluorescent microspheres,this study developed two rapid point-of-care antigen immunochromatographic strips for the detection of porcine deltacoronavirus.The fluorescent microsphere-based lateral flow test strip demonstrated a sensitivity of 10^(1.7)TCID_(50)/0.1 mL,which is fourfold higher than that of the colloidal gold-based assay.Porcine deltacoronavirus(PDCoV)is a recently identified enteric coronavirus that causes an acute infectious disease in piglets,leading to diarrhea,vomiting,dehydration,and mortality(Hu et al.2015). 展开更多
关键词 enteric coronavirus point care antigen detection fluorescent microspheresthis immunochromatographic strips porcine deltacoronavirusthe fluorescent immunochromatographic test strips colloidal gold porcine deltacoronavirus
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Effect of acupuncture on acupoint "Yingxiang-Hegu" on Th1, Th2 cytokines and T-bet/GATA-3 of allergic rhinitis rats
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作者 Hu Qing Su Jia-qi +6 位作者 Lou Jin-cheng Miao Tan-yun Yin Hao Ji Mei-qi Zhai Chun-tao Hao Zhong-yao Lu Yu-e 《Journal of Hainan Medical University》 CAS 2023年第15期14-22,共9页
Objective:To explore the effect of"Yingxiang-Hegu"on Th1,Th2-related cytokines and[2]transcription factors T-bet and GATA-3 in rats with allergic rhinitis.Methods:Rats were randomly divided into three groups... Objective:To explore the effect of"Yingxiang-Hegu"on Th1,Th2-related cytokines and[2]transcription factors T-bet and GATA-3 in rats with allergic rhinitis.Methods:Rats were randomly divided into three groups:blank group,model group and acupoint group.The rat model of ovalbumin(OVA)AR was established,and the general condition of the rats was observed and scored.Acupuncture intervention was performed on the acupoint group on the second day after successful modeling,once per day for 20 min for 10 d.After intervention,the general behavior,behavioral score and histomorphological changes of nasal mucosa were observed.Eosinophils(EOS)were counted under microscope after nasal lavage smear staining,and the contents of total IgE,IFN-γ,IL-12,IL-4 and IL-5 in serum were detected by ELISA.Westernblot and IHC were used to detect the protein level and positive protein expression of specific transcription factors T-bet and GATA-3 in rat nasal mucosa.Results:After the establishment of the model,except for the blank group,the behavioral observation scores of rats in the model group and acupoint group were more than 5 points,indicating that the model was successful.After acupuncture intervention on acupoint"Yingxiang-Hegu",the behavioral score of rats in the acupoint group and western medicine group was significantly lower than that in the model group(P<0.05).Microscopic examination showed that the structure of nasal mucosa in the model group was obviously damaged,cilia were arranged discontinuously,uneven,local congestion and swelling,a large number of epithelial cells exfoliated and necrotic,goblet cell proliferation,obvious inflammatory cell infiltration.The pathological degree of nasal mucosa in the pair point group was significantly less than that in the model group.Compared with the model group,the levels of IFN-γ,IL-2 and IL-12 in serum were significantly increased,while IgE,IL-4,IL-5 and IL-6 were significantly decreased,GATA-3 protein and positive expression in nasal mucosa were significantly decreased and T-bet was significantly increased after acupuncture.Conclusion:Acupuncture at"Yingxiang-Hegu"can effectively improve the nasal sensitive symptoms and control nasal inflammation in AR rats.The mechanism may be that acupuncture at Yingxiang-Hegu can up-regulate the expression of T-bet,decrease the level of GATA-3,promote the production of Th1 cytokines and inhibit the synthesis and secretion of Th2 cells,thus restoring the immune balance of Th1 and Th2. 展开更多
关键词 Allergic rhinitis Paired points "Yingxiang"acupoint "hegu"acupoint Helper T cells CYTOKINES GATA binding protein 3 T box transcription factor
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基于PointNet与曲率约束的导丝配准方法
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作者 邓子寒 胡陟 +2 位作者 辛绍宗 李树凡 张贝朗 《中国医学物理学杂志》 2026年第2期204-210,共7页
针对血管介入手术过程中,传统配准算法处理柔性导丝的动态变化时,高度依赖导丝的初始位姿,配准精度不足、容易陷入局部最优解和效率低下的问题,提出一种基于PointNet与曲率约束的导丝配准方法。首先,建立导丝和血管的物理模型,获取运动... 针对血管介入手术过程中,传统配准算法处理柔性导丝的动态变化时,高度依赖导丝的初始位姿,配准精度不足、容易陷入局部最优解和效率低下的问题,提出一种基于PointNet与曲率约束的导丝配准方法。首先,建立导丝和血管的物理模型,获取运动点位置。然后,利用PointNet提取关键点特征,通过姿态回归网络预测导丝点云和血管中心线点云的变换矩阵,使用KD-Tree加速搜索点云目标并基于曲率特征约束的迭代最近点算法对配准结果进行优化。实验结果表明,相较于传统方法和基于学习的方法,本文方法的均方误差、平均绝对误差最小,证明该方法在血管介入导丝配准中的有效性。 展开更多
关键词 血管介入 pointNet 回归预测 最近迭代点 曲率
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基于WSS-Pointnet的变电站点云弱监督语义分割方法
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作者 裴少通 孙海超 +2 位作者 胡晨龙 王玮琦 兰博 《电工技术学报》 北大核心 2026年第1期234-245,共12页
现有的变电站点云语义分割算法均采用完全监督学习,需要大量人工标注点云数据,导致分割任务耗时长且成本高昂。为解决这一问题,该文提出一种基于PointNet改进的弱监督语义分割PointNet(WSS-PointNet)算法。首先,通过构建多层降采样结构... 现有的变电站点云语义分割算法均采用完全监督学习,需要大量人工标注点云数据,导致分割任务耗时长且成本高昂。为解决这一问题,该文提出一种基于PointNet改进的弱监督语义分割PointNet(WSS-PointNet)算法。首先,通过构建多层降采样结构,结合采样层与分组层对输入点云数据进行多尺度特征提取,从而捕捉点云在不同尺度上的几何和拓扑信息。在此基础上,引入PointNet结构以进一步提取区域特征,优化局部特征整合与全局特征表示;针对粗粒度语义特征的优化,提出膨胀式语义信息嵌入与浸染式语义信息嵌入两种模块,分别采用“由内而外”和“由外而内”的信息传递策略对点云语义信息进行细致处理,两种嵌入机制均基于图卷积神经网络,通过捕捉局部连接模式与信息共享实现语义特征的高效传播。其次,构建变电站点云数据集,并对WSS-PointNet算法进行消融实验,同时与主流的完全监督学习算法和弱监督学习算法进行对比。经实验验证,WSS-PointNet相比于改进前将变电站点云分割的总体精度(OA)提高了10.3个百分点,平均交并比(mIoU)提高了10.1个百分点,平均准确率(mAcc)提高了10.5个百分点,同时在标注所需时间方面缩短了90%,接近完全监督算法中最好的分割效果。该模型可显著降低处理变电站点云数据的时间与成本,同时保持点云分割的高精度。 展开更多
关键词 点云语义分割 弱监督方法 膨胀式语义信息嵌入 浸染式语义信息嵌入 变电站
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A Method for Automatic Feature Points Extraction of Pelvic Surface Based on PointMLP_RegNet
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作者 Wei Kou Rui Zhou +5 位作者 Hongmiao Zhang Jianwen Cheng Chi Zhu Shaolong Kuang Lihai Zhang Lining Sun 《CAAI Transactions on Intelligence Technology》 2025年第3期716-727,共12页
The success of robot-assisted pelvic fracture reduction surgery heavily relies on the accuracy of 3D/3D feature-based registration.This process involves extracting anatomical feature points from pre-operative 3D image... The success of robot-assisted pelvic fracture reduction surgery heavily relies on the accuracy of 3D/3D feature-based registration.This process involves extracting anatomical feature points from pre-operative 3D images which can be challenging because of the complex and variable structure of the pelvis.PointMLP_RegNet,a modified PointMLP,was introduced to address this issue.It retains the feature extraction module of PointMLP but replaces the classification layer with a regression layer to predict the coordinates of feature points instead of conducting regular classification.A flowchart for an automatic feature points extraction method was presented,and a series of experiments was conducted on a clinical pelvic dataset to confirm the accuracy and effectiveness of the method.PointMLP_RegNet extracted feature points more accurately,with 8 out of 10 points showing less than 4 mm errors and the remaining two less than 5 mm.Compared to PointNettt and PointNet,it exhibited higher accuracy,robustness and space efficiency.The proposed method will improve the accuracy of anatomical feature points extraction,enhance intra-operative registration precision and facilitate the widespread clinical application of robot-assisted pelvic fracture reduction. 展开更多
关键词 automatic feature points extraction feature points intra-operative registration pointMLP_RegNet robot-assisted pelvic fracture reduction surgery
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基于Pointnet++的花生植株三维模型器官分割研究
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作者 孟兆凡 程曼 +1 位作者 袁洪波 赵欢 《中国农机化学报》 北大核心 2026年第1期118-127,共10页
基于点云进行三维重构并进行器官分割对植物学研究至关重要,为研究花生植株茎叶器官分割训练样本的数量和类型对分割结果的影响规律,基于Pointnet++构建花生植株三维模型茎叶分割网络模型,并对比分析训练集类型以及数量对分割效果的影... 基于点云进行三维重构并进行器官分割对植物学研究至关重要,为研究花生植株茎叶器官分割训练样本的数量和类型对分割结果的影响规律,基于Pointnet++构建花生植株三维模型茎叶分割网络模型,并对比分析训练集类型以及数量对分割效果的影响。当训练集为10株花生幼苗期数据时,模型分割效果最好,准确率、类平均准确率、类平均交并比、F1分数分别为94.5%、81.9%、76.9%、85.7%。其中,在花生荚果期训练集中加入20株开花期数据,类平均准确率、类平均交并比分别上升19.55%、20.75%。试验结果表明,Pointnet++可以有效分割花生植株茎叶器官,训练集的多样性和数据量的增加有利于模型学习花生植株不同生长阶段的形态特征,在训练集中加入相近生长阶段和生长特征的模型数据,并增加数据量对模型分割效果提高更明显。 展开更多
关键词 花生植株 三维建模 点云 器官分割 训练集
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The historical source of “Trigger Points”:classical Ashi points 被引量:4
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作者 姜姗 赵京生 《World Journal of Acupuncture-Moxibustion》 CSCD 2016年第2期11-14,共4页
Our research began with a consideration of the etymological origins of the terms Ashi and the Ashi point. We used both original source texts and textual criticism to trace the original meaning of the phrases, "take t... Our research began with a consideration of the etymological origins of the terms Ashi and the Ashi point. We used both original source texts and textual criticism to trace the original meaning of the phrases, "take the tender spot as the point" and "use the Ashi method." Linguistic theory informed our discussion of three similar terms and our analysis of them. We show that Ashi points are in theory similar to regular acupuncture points in terms of their definition and function. Furthermore, we can use the concept of "c/i-pathway (Qi./ie)" to expand our understanding of the clinical use of Ashi points. Ultimately, the main purpose of our research was to clarify that the classical Ashi point and modern, western concept of the trigger point are in fact quite similar. The two concepts have been described in different languages primarily due to cultural differences. 展开更多
关键词 Ashi point tenderness as acupoint ACUpointS local effect triggerpoint dry needling
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Nomenclature and location of acupuncture points for laboratory animals Part 3:Mouse 被引量:3
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作者 《World Journal of Acupuncture-Moxibustion》 2025年第2期160-162,共3页
This paper introduces part of the content in the association standard,T/CAAM0002–2020 Nomenclature and Location of Acupuncture Points for Laboratory Animals Part 3:Mouse.This standard was released by the China Associ... This paper introduces part of the content in the association standard,T/CAAM0002–2020 Nomenclature and Location of Acupuncture Points for Laboratory Animals Part 3:Mouse.This standard was released by the China Association of Acupuncture and Moxibustion on May 15,2020,implemented on October 31,2020,and published by Standards Press of China.The standard was drafted by the Institute of Acupuncture and Moxibustion,China Academy of Chinese Medical Sciences,and the Nanjing University of Chinese Medicine.Principal draftsmen:Xiang-hong JING and Xing-bang HUA.Participating draftsmen:Wan-zhu BAI,Bin XU,Dong-sheng XU,Yi GUO,Tie-ming MA,Xin-jun WANG,and Sheng-feng LU. 展开更多
关键词 acupuncture points STANDARD MOUSE NOMENCLATURE location acupuncture points association standardt caam LOCATION acupuncture moxibustion
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CD8^(+)T细胞耗竭时变模型揭示HIV感染中的tipping point
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作者 孙奥 郭婷 邱志鹏 《哈尔滨师范大学自然科学学报》 2025年第6期13-21,共9页
CD8^(+)T细胞耗竭是导致HIV持续感染的重要因素,研究其对HIV感染的影响具有重要意义.研究构建了一个包含CD8^(+)T细胞耗竭动态演变过程的HIV病毒-免疫相互作用的时变动力学模型.首先分析了对应自治系统平衡点的存在性与稳定性,并通过数... CD8^(+)T细胞耗竭是导致HIV持续感染的重要因素,研究其对HIV感染的影响具有重要意义.研究构建了一个包含CD8^(+)T细胞耗竭动态演变过程的HIV病毒-免疫相互作用的时变动力学模型.首先分析了对应自治系统平衡点的存在性与稳定性,并通过数值分析揭示了系统的鞍结分岔与双稳态现象.随后,引入函数s(t)描述耗竭的非平稳发展,并对时变系统进行了数值模拟研究.结果表明:(1)CD8^(+)T细胞耗竭的发展是驱动HIV感染的疾病进展的关键因素;(2)更快的耗竭发展速率会显著加速HIV感染的疾病进展;(3)耗竭的发展通过诱发B-tipping现象这一状态突变机制,导致病毒载量急剧上升,促使疾病从低病毒载量的无症状期进展到高病毒载量的艾滋病期. 展开更多
关键词 CD8^(+)T细胞耗竭 时变模型 tipping point HIV感染
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基于改进PointNet++的中压电力线点云分类方法 被引量:2
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作者 雒建艳 《应用激光》 北大核心 2025年第3期146-158,共13页
针对中压电力线点云分类中存在的噪声干扰、分类精度低和鲁棒性不足的问题,提出一种基于改进PointNet++的中压电力线点云分类方法。首先,通过多种手段提取点云空间信息、几何特征以及局部几何特征等多维度特征,为点云单点构造40维特征向... 针对中压电力线点云分类中存在的噪声干扰、分类精度低和鲁棒性不足的问题,提出一种基于改进PointNet++的中压电力线点云分类方法。首先,通过多种手段提取点云空间信息、几何特征以及局部几何特征等多维度特征,为点云单点构造40维特征向量;然后对PointNet++进行改进,引入了点注意力模块(point attention module,PAM)和组注意力模块(group attention module,GAM),同时与层归一化(layer norm)和残差连接结构组合使用,用以增强其特征的细节捕捉能力,降低复杂环境对分类效果影响;最后采用某地机载采集的10 kV中压电力线走廊数据构建数据集,进行了方法验证。实验结果表明,所提方法在Precision、Recall和F_1-score上均优于传统机器学习方法和基于PointNet、PointNet++的深度学习方法。相较于PointNet++(XYZ+Features),所提方法在Precision、Recall和F_1-score上分别高出1.6个百分点、5.3个百分点和4.6个百分点,且通过可视化结果进一步验证了PAM和GAM的有效性。验证了所提方法在中压电力线点云的提取上更为精确,其结构特征更加清晰,且与周围环境的区分度更高。 展开更多
关键词 激光点云 注意力机制 pointNet++ 中压电力线 点云分类
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