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Using shapes correlation for active contour segmentation of uterine fibroid ultrasound images in computer-aided therapy

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Applied Mathematics(A Journal of Chinese Universities) 2016年第1期31卷 37-52页

作者： NI Bo HE Fa-zhi pan yi-teng YUAN Zhi-yong School of Computer Science Wuhan University School of Computer Science Hubei Polytechnic University

Segmenting the lesion regions from the ultrasound （US） images is an important step in the intra-operative planning of some computer-aided therapies. High-Intensity Focused Ultrasound （HIFU）, as a popular computer-aided therapy, has been widely used in the treatment of uterine fibroids. However, such segmentation in HIFU remains challenge for two reasons：（1） the blurry or missing boundaries of lesion regions in the HIFU images and （2） the deformation of uterine fibroids caused by the patient＇s breathing or an external force during the US imaging process, which can lead to complex shapes of lesion regions. These factors have prevented classical active contour-based segmentation methods from yielding desired results for uterine fibroids in US images. In this paper, a novel active contour-based segmentation method is proposed, which utilizes the correlation information of target shapes among a sequence of images as prior knowledge to aid the existing active contour method. This prior knowledge can be interpreted as a unsupervised clustering of shapes prior modeling. Meanwhile, it is also proved that the shapes correlation has the low-rank property in a linear space, and the theory of matrix recovery is used as an effective tool to impose the proposed prior on an existing active contour model. Finally, an accurate method is developed to solve the proposed model by using the Augmented Lagrange Multiplier （ALM）. Experimental results from both synthetic and clinical uterine fibroids US image sequences demonstrate that the proposed method can consistently improve the performance of active contour models and increase the robustness against missing or misleading boundaries, and can greatly improve the efficiency of HIFU therapy.

关键词： Active contour shapes correlation ultrasound image segmentation matrix recovery computer-aided therapy.

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一种基于信任关系隐含相似度的社会化推荐算法

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计算机学报 2018年第1期41卷 65-81页

作者：潘一腾何发智于海平武汉大学软件工程国家重点实验室武汉430072 武汉大学计算机学院武汉430072

推荐算法已经成为许多电子商务网站必不可少的组成部分.基于用户历史评价数据的协同过滤推荐算法通常面临着数据稀疏的问题,即用户评分过于稀疏导致推荐质量下降.为了解决这一问题,结合辅助数据成为一种必然的趋势.因此,随着社交媒体的... 详细信息

推荐算法已经成为许多电子商务网站必不可少的组成部分.基于用户历史评价数据的协同过滤推荐算法通常面临着数据稀疏的问题,即用户评分过于稀疏导致推荐质量下降.为了解决这一问题,结合辅助数据成为一种必然的趋势.因此,随着社交媒体的发展,基于信任关系的社会化推荐算法被证明为一种有效的解决方法.这些算法利用社交网络信息对用户偏好进行建模,并进行推荐.然而,目前大部分算法直接利用社交网络的二值信任关系来提高推荐质量,从而没有考虑用户对每个好友信任强度的差异.为了解决这一问题,该文提出了一种新的基于信任关系隐含相似度的度量方法,并与协同推荐算法相结合,获得更高的推荐质量.与之前的方法不同,在考虑评分相似度的基础上,该文专注于研究利用社交信息来估计信任强度并提出了信任关系隐含相似度.首先,该文考虑了用户间的间接影响,即通过分解社交矩阵得到隐含间接影响的用户社交偏好,并基于此得到了信任关系隐含相似度;其次,鉴于用户在作为信任者和被信任者时的偏好并不相同,该文提出的信任关系隐含相似度分别考虑了这两种情况;进一步,考虑到评分和社交数据都非常稀疏,文章同时考虑了评分相似和信任相似对每组用户间信任强度的影响,得到一个更加精确的社会化推荐模型;最后,不同于直接计算信任强度的算法,该文基于评分和社交数据,提出了一种自适应相似度计算的模型.该文在Epinions和Ciao数据集上进行了丰富的实验,并与多种前沿的算法进行了性能对比.文中同时采用基于误差的指标(MAE和RMSE)和排序类指标(精度、召回率和NDCG)对算法性能的性能进行度量,结果表明该文算法对于评分预测和Top-N项目推荐任务都能得到鲁棒的表现.文中还展示了对于评分和信任数据稀疏用户的性能表现,结果仍优于以往的算法.概括来说,文中算法充分挖掘了用户在评分和社交数据中的隐含信息,从而有效提高了社会化推荐算法的精度.

关键词：推荐系统协同过滤算法社会推荐算法潜在矩阵分解信任关系传播隐含相似度

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基于簇相似的多分类器目标跟踪算法

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电子学报 2016年第4期44卷 821-825页

作者：李康何发智潘一腾孙航武汉大学计算机学院湖北武汉430072

由于跟踪过程中目标和背景的变化,传统的单分类器跟踪算法学习到大量的非目标信息而导致跟踪精度降低.针对该问题,本文提出使用树形结构保存历史分类器.在每一帧,根据树中路径距离选择分类器集对测试样本分类.提出了一种基于簇相似性比... 详细信息

由于跟踪过程中目标和背景的变化,传统的单分类器跟踪算法学习到大量的非目标信息而导致跟踪精度降低.针对该问题,本文提出使用树形结构保存历史分类器.在每一帧,根据树中路径距离选择分类器集对测试样本分类.提出了一种基于簇相似性比较的分类算法.通过建立以方差为尺度的特征空间,比较测试样本到簇中心的距离计算相似度,快速计算出目标样本.实验表明本算法能够在复杂条件下实现对目标的鲁棒跟踪.

关键词：目标跟踪多分类器在线学习类哈尔特征

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一种基于多特征的距离正则化水平集快速分割方法

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电子学报 2017年第3期45卷 534-539页

作者：于海平何发智潘一腾陈晓武汉大学软件工程国家重点实验室湖北武汉430072 武汉大学计算机学院湖北武汉430072 武汉科技大学城市学院湖北武汉430083

现有的图像分割模型存在对初始化信息敏感,分割速率慢,图像弱边界区的泄露等现象.提出了一种混合快速分割方法.该方法利用偏压场近似估计图像的局部统计信息,并结合全局信息相容性及改进的距离正则化方法建立模型,最后将模型嵌入水平集... 详细信息

现有的图像分割模型存在对初始化信息敏感,分割速率慢,图像弱边界区的泄露等现象.提出了一种混合快速分割方法.该方法利用偏压场近似估计图像的局部统计信息,并结合全局信息相容性及改进的距离正则化方法建立模型,最后将模型嵌入水平集框架中,与此同时,引入双重终止准则以提高分割的速度.最后利用合成图像和真实图像进行分割实验,并与CV(Chan-Vese)模型、非线性自适应水平集方法以及局部尺度拟合模型对比,表明本方法不仅对初始化信息敏感度降低,而且分割速度提高3~5倍.

关键词：图像分割水平集距离正则化近似估计多特征

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DDS技术正弦信号发生器的实现

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企业技术开发 2009年第2期28卷 11-12页

作者：颜卫潘一腾武汉大学电子信息学院湖北武汉430000

该系统基于DDS技术的正弦信号发生器,其主要模块有DDS部分正弦波生成、频率控制、幅度控制、D/A转换和后级处理以实现AM、FM、ASK、PSK、FSK等功能)。各模块均通过Verilog语言编程在FPGA上实现然后在后级处理采用低通滤波器和功率放大... 详细信息

该系统基于DDS技术的正弦信号发生器,其主要模块有DDS部分正弦波生成、频率控制、幅度控制、D/A转换和后级处理以实现AM、FM、ASK、PSK、FSK等功能)。各模块均通过Verilog语言编程在FPGA上实现然后在后级处理采用低通滤波器和功率放大电路来提高波形质量和负载能力。最终得到所要求的正弦信号发生器,在现代通信中具有良好的使用性。

关键词：正弦信号发生器使用性

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Engineering atomic Rb-N configurations to tune radical pathways for highly selective photocatalytic H2O2 synthesis coupled with biomass valorization

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Journal of Energy Chemistry 2025年第1期100卷 215-225页

作者： Jiaye Li Shuang pan yihuang Chen Qiong Liu College of Chemistry and Materials Engineering Wenzhou University Guangdong Provincial Key Laboratory of Chemical Measurement and Emergency Test Technology (China) Institute of Analysis Guangdong Academy of Sciences (China National Analytical CenterGuangzhou)

Photocatalytic oxygen reduction for hydrogen peroxide （H2O2） synthesis presents a green and costeffective production ***,achieving highly selective H2O2synthesis remains challenging,necessitating precise control over free radical reaction pathways and minimizing undesirable oxidative ***,we report for the visible light-driven simultaneous co-photocatalytic reduction of O2to H2O2and oxidation of biomass using the atomic rubidium-nitride modified carbon nitride（CNRb）.The optimized CNRb catalyst demonstrates a record photoreduction rate of 8.01 mM h-1for H2O2generation and photooxidation rate of 3.75 mM h-1for furfuryl alcohol to furoic acid,achieving a remarkable solar-to-chemical conversion （SCC） efficiency of up to 2.27%.Experimental characterizations and DFT calculation disclosed that the introducing atomic Rb–N configurations allows for the high-selective generation of superoxide radicals while suppressing hydroxyl free radical *** is because the Rb–N serves as the new alternative site to perceive a stronger connection position for O2adsorption and reinforce the capability to extract protons,thereby triggering a high selective redox product *** study holds great potential in precisely regulating reactive radical processes at the atomic level,thereby paving the way for efficient synthesis of H2O2coupled with biomass valorization.

关键词： Atomic economy Radical pathway regulation Rubidium atom coordination Biomass valorization

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The role of axon guidance molecules in the pathogenesis of epilepsy

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Neural Regeneration Research 2025年第5期20卷 1244-1257页

作者： Zheng Liu Chunhua pan Hao Huang Department of Neurology Affiliated Hospital of Zunyi Medical UniversityZunyiGuizhou ProvinceChina

Current treatments for epilepsy can only manage the symptoms of the condition but cannot alter the initial onset or halt the progression of the disease. Consequently, it is crucial to identify drugs that can target novel cellular and molecular mechanisms and mechanisms of action. Increasing evidence suggests that axon guidance molecules play a role in the structural and functional modifications of neural networks and that the dysregulation of these molecules is associated with epilepsy susceptibility. In this review, we discuss the essential role of axon guidance molecules in neuronal activity in patients with epilepsy as well as the impact of these molecules on synaptic plasticity and brain tissue remodeling. Furthermore, we examine the relationship between axon guidance molecules and neuroinflammation, as well as the structural changes in specific brain regions that contribute to the development of epilepsy. Ample evidence indicates that axon guidance molecules, including semaphorins and ephrins, play a fundamental role in guiding axon growth and the establishment of synaptic connections. Deviations in their expression or function can disrupt neuronal connections, ultimately leading to epileptic seizures. The remodeling of neural networks is a significant characteristic of epilepsy, with axon guidance molecules playing a role in the dynamic reorganization of neural circuits. This, in turn, affects synapse formation and elimination. Dysregulation of these molecules can upset the delicate balance between excitation and inhibition within a neural network, thereby increasing the risk of overexcitation and the development of epilepsy. Inflammatory signals can regulate the expression and function of axon guidance molecules, thus influencing axonal growth, axon orientation, and synaptic plasticity. The dysregulation of neuroinflammation can intensify neuronal dysfunction and contribute to the occurrence of epilepsy. This review delves into the mechanisms associated with

关键词： axon guidance drug-resistant epilepsy epilepsy nerve regeneration nervous system diseases neural pathways neuroinflammatory diseases neuronal plasticity neurons synaptic remodeling

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Co-production of hydrogen, oxygen, and electricity via an integrated solar-driven system with decoupled water electrolyzer and Na-Zn ion battery

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Journal of Energy Chemistry 2025年第1期100卷 621-627页

作者： Fei Lv Longjie Liu Jiazhe Wu Pengfei Wang Lixia pan Dengwei Jing Yubin Chen International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University

Combining water electrolysis and rechargeable battery technologies into a single system holds great promise for the co-production of hydrogen （H2） and ***,the design and development of such systems is still in its ***,an integrated hydrogen-oxygen （O2）-electricity co-production system featuring a bipolar membrane-assisted decoupled electrolyzer and a Na-Zn ion battery was established with sodium nickelhexacyanoferrate （NaNiHCF） and Zn2+/Zn as dual redox *** decoupled electrolyzer enables to produce H2and O2in different time and space with almost 100%Faradaic efficiency at 100 mA ***,the charged NaNiHCF and Zn electrodes after the electrolysis processes formed a Na-Zn ion battery,which can generate electricity with an average cell voltage of 1.75 V at 10 m A *** connecting Si photovoltaics with the modular electrochemical device,a well-matched solar driven system was built to convert the intermittent solar energy into hydrogen and electric energy with a solar to hydrogen-electricity efficiency of 16.7%,demonstrating the flexible storage and conversion of renewables.

关键词： Hydrogen Electricity Decoupled water electrolyzer Na-Zn ion battery Solar energy

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Sky location of massive black hole binaries in the foreground of Galactic white dwarf binaries

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 97-108页

作者： pan Guo Hong-Bo Jin Cong-Feng Qiao Yue-Liang Wu The International Centre for Theoretical Physics Asia-Pacific University of Chinese Academy of Sciences The School of Physical Sciences University of Chinese Academy of Sciences Institute for Frontiers in Astronomy and Astrophysics Beijing Normal University National Astronomical Observatories Chinese Academy of Sciences Institute of Theoretical Physics Chinese Academy of Sciences

For space-based gravitational wave （GW） detection,the main noise source for massive black hole binaries （MBHBs） is attributed to approximately 10～7double white dwarf binaries in the *** a GW source,the amplitude of the detector response,recorded by a space-based gravitational wave detector,exhibits a modulation effect with a year period when observing the source from various orbital *** the adverse conditions mentioned above,where there is a strong foreground noise and annual modulation in the signals,we employed the wavelet transform and the strong-amplitude relevant orbital position search methods,which allows the weak MBHB sources to achieve higher locating *** detail,for two MBHB sources of lower intensity,the precision of luminosity distance,represented by the ratio ?DL/DLat the 95%confidence level,is enhanced by factors of ～*** angular resolutions,denoted by??s,are enhanced by a factor of ～*** improvements increase the number of detectable GW sources,facilitate multi-messenger follow-up observations and provide constraints on the cosmological constant.

关键词： space-based gravitational wave detection gravitational waves massive black hole binaries

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Defect Engineering:Can it Mitigate Strong Coulomb Effect of Mg^(2+)in Cathode Materials for Rechargeable Magnesium Batteries?

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Nano-Micro Letters 2025年第1期17卷 135-159页

作者： Zhengqing Fan Ruimin Li Xin Zhang Wanyu Zhao Zhenghui pan Xiaowei Yang School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China School of Chemistry and Chemical Engineering Taiyuan University of TechnologyTaiyuan 030024People’s Republic of China School of Materials Science and Engineering Tongji UniversityShanghai 201804People’s Republic of China

Rechargeable magnesium batteries(RMBs)have been considered a promising“post lithium-ion battery”system to meet the rapidly increasing demand of the emerging electric vehicle and grid energy storage ***,the sluggish diffusion kinetics of bivalent Mg^(2+)in the host material,related to the strong Coulomb effect between Mg^(2+)and host anion lattices,hinders their further development toward practical *** engineering,regarded as an effective strategy to break through the slow migration puzzle,has been validated in various cathode materials for *** this review,we first thoroughly understand the intrinsic mechanism of Mg^(2+)diffusion in cathode materials,from which the key factors affecting ion diffusion are further ***,the positive effects of purposely introduced defects,including vacancy and doping,and the corresponding strategies for introducing various defects are *** applications of defect engineering in cathode materials for RMBs with advanced electrochemical properties are also ***,the existing challenges and future perspectives of defect engineering in cathode materials for the overall high-performance RMBs are described.

关键词： Rechargeable magnesium battery Sluggish diffusion kinetic Defect engineering Cathode materials Ion migration

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