检索结果-南通市图书馆

Data Matching of Solar Images Super-Resolution Based on Deep Learning

Computers, Materials & Continua 2021年第9期68卷 4017-4029页

作者： Liu Xiangchun Chen Zhan Song Wei Li Fenglei yang yanxing School of Information Engineering Minzu University of ChinaBeijing100081China National Language Resource Monitoring and Research Center of Minority Languages Minzu University of ChinaBeijing100081China CAS Key Laboratory of Solar Activity National Astronomical ObservatoriesBeijing100101China Department of Physics New Jersey Institute of TechnologyNewarkNew Jersey07102-1982USA

The images captured by different observation station have different *** Helioseismic and Magnetic Imager(HMI:a part of the NASA Solar Dynamics Observatory SDO)has low-precision but wide *** the Goode Solar Telescope(GST,formerly known as the New Solar Telescope)at Big Bear Solar Observatory(BBSO)solar images has high precision but small *** super-resolution can make the captured images become clearer,so it is wildly used in solar image *** traditional super-resolution methods,such as interpolation,often use single image’s feature to improve the image’s *** methods based on deep learning-based super-resolution image reconstruction algorithms have better quality,but small-scale features often become *** solve this problem,a transitional amplification network structure is *** network can use the two types images relationship to make the images *** adding a transition image with almost no difference between the source image and the target image,the transitional amplification training procedure includes three parts:transition image acquisition,transition network training with source images and transition images,and amplification network training with transition images and target *** addition,the traditional evaluation indicators based on structural similarity(SSIM)and peak signal-to-noise ratio(PSNR)calculate the difference in pixel values and perform poorly in cross-type image *** method based on feature matching can effectively evaluate the similarity and clarity of *** experimental results show that the quality index of the reconstructed image is consistent with the visual effect.

关键词： Super resolution transition amplification transfer learning

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

基于5.0T MRI定量肝脏质子密度脂肪分数

引用

中国医学影像技术 2024年第5期40卷 671-676页

作者：刘建宪王振松王鑫田宁陈鹏于丹杨燕兴程传力邹超甘洁山东大学附属山东省立第三医院影像中心山东济南250032 北京联影智能影像技术研究院北京100094 上海联影医疗科技股份有限公司上海201807 深圳先进技术研究院劳特伯生物医学成像研究中心广东深圳518055

目的观察5.0T MRI用于定量肝脏质子密度脂肪分数(PDFF)的价值。方法前瞻性对30名受试者分别行5.0T、3.0T、1.5T肝脏化学位移编码(CSE)MR扫描,测量CSE-PDFF;之后行5.0T、1.5T MR波谱(MRS),测量MRS-PDFF。分析不同方法所测肝脏PDFF的一致... 详细信息

目的观察5.0T MRI用于定量肝脏质子密度脂肪分数(PDFF)的价值。方法前瞻性对30名受试者分别行5.0T、3.0T、1.5T肝脏化学位移编码(CSE)MR扫描,测量CSE-PDFF;之后行5.0T、1.5T MR波谱(MRS),测量MRS-PDFF。分析不同方法所测肝脏PDFF的一致性,评估5.0T MRI定量肝脏PDFF的价值。结果以不同场强MR设备所测肝脏CSE-PDFF总体一致性良好(ICC均>0.75,P均0.75,P均<0.001);其中,5.0T MR所测CSE-PDFF与MRS-PDFF一致性好(ICC=0.988,P<0.001),5.0T MR所测CSE-PDFF与1.5T MR所测MRS-PDFF一致性好(ICC=0.978,P<0.001)。结论5.0T MRI对定量肝脏PDFF具有较高价值。

关键词：肝脂肪组织磁共振成像脂肪分数前瞻性研究

来源：

维普期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Unsupervised Graph-Based Tibetan Multi-Document Summarization

引用

Computers, Materials & Continua 2022年第10期73卷 1769-1781页

作者： Xiaodong Yan Yiqin Wang Wei Song Xiaobing Zhao A.Run yang yanxing School of Information and Engineering Minzu University of ChinaBeijing100081China National Language Resource Monitoring&Research Center Minority Languages BranchBeijing100081China University of California IrvineCalifornia92617USA Department of Physics New Jersey Institute of TechnologyNewarkNew Jersey07102-1982USA

Text summarization creates subset that represents the most important or relevant information in the original content,which effectively reduce information *** neural network method has achieved good results in the task of text summarization both in Chinese and English,but the research of text summarization in low-resource languages is still in the exploratory stage,especially in ***’s more,there is no large-scale annotated corpus for text *** lack of dataset severely limits the development of low-resource text *** this case,unsupervised learning approaches are more appealing in low-resource languages as they do not require labeled *** this paper,we propose an unsupervised graph-based Tibetan multi-document summarization method,which divides a large number of Tibetan news documents into topics and extracts the summarization of each *** obtained by using traditional graph-based methods have high redundancy and the division of documents topics are not detailed *** terms of topic division,we adopt two level clustering methods converting original document into document-level and sentence-level graph,next we take both linguistic and deep representation into account and integrate external corpus into graph to obtain the sentence semantic *** the shortcomings of the traditional K-Means clustering method and perform more detailed clustering of *** model sentence clusters into graphs,finally remeasure sentence nodes based on the topic semantic information and the impact of topic features on sentences,higher topic relevance summary is *** order to promote the development of Tibetan text summarization,and to meet the needs of relevant researchers for high-quality Tibetan text summarization datasets,this paper manually constructs a Tibetan summarization dataset and carries out relevant *** experiment results show that our method can effectively improve the

关键词： Multi-document summarization text clustering topic feature fusion graphic model

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

5.0T与1.5T MR波谱定量肝脏质子密度脂肪分数的一致性

引用

中国医学影像技术 2024年第5期40卷 677-681页

作者：刘建宪王振松李正义王鑫于丹杨燕兴程传力邹超陈硕甘洁山东大学附属山东省立第三医院影像中心山东济南250032 北京联影智能影像技术研究院北京100094 上海联影医疗科技股份有限公司上海201807 中国科学院深圳先进技术研究院劳特伯生物医学成像研究中心广东深圳518055

目的观察5.0T与1.5T MR波谱(MRS)定量肝脏质子密度脂肪分数(PDFF)的一致性。方法分别以5.0T及1.5TMR仪对脂质含量各为0、5%、10%、15%、20%、25%及30%的脂质乳液模型采集^(1)H-MRS,以jMRUI软件分析获得PDFF。前瞻性对11例脂肪肝患者及1... 详细信息

目的观察5.0T与1.5T MR波谱(MRS)定量肝脏质子密度脂肪分数(PDFF)的一致性。方法分别以5.0T及1.5TMR仪对脂质含量各为0、5%、10%、15%、20%、25%及30%的脂质乳液模型采集^(1)H-MRS,以jMRUI软件分析获得PDFF。前瞻性对11例脂肪肝患者及12名健康成人肝脏感兴趣容积(VOI)采集^(1)H-MRS,分别以jMRUI软件及相应工作站进行分析并获得PDFF。观察各方法所测脂质乳液模型及肝脏PDFF的一致性。结果针对脂质含量0、5%、10%、15%、20%、25%及30%的脂质乳液模型,以jMRUI软件基于5.0T与1.5T^(1)H-MRS所测PDFF均一致性良好并呈正相关。针对全部人体肝脏VOI,以jMRUI软件及工作站针对5.0T与1.5T^(1)H-MRS所测的PDFF亦均一致性良好且均呈正相关。结论5.0T与1.5T^(1)H-MRS用于定量肝脏PDFF一致性良好且呈正相关;临床以工作站测量肝脏PDFF有利于简化工作流程。

关键词：肝磁共振波谱前瞻性研究质子密度脂肪分数

来源：

维普期刊数据库博看期刊

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

颈动脉超声联合ABCD3-Ⅰ评分及血清miR-146a预测短暂性脑缺血发作后继发脑梗死的临床价值

引用

临床超声医学杂志 2024年第3期26卷 234-238页

作者：彭晓磊宜晓茸王莹杨延星郝洁妮延安大学附属医院心脑血管病医院超声诊断科陕西省延安市716000 延安市瑞康康复医院内科

目的探讨颈动脉超声联合ABCD3-Ⅰ评分及血清miR-146a预测短暂性脑缺血发作(TIA)后继发脑梗死的临床应用价值。方法选取我院收治的90例TIA患者,根据TIA后30 d内是否继发脑梗死分为脑梗死组42例和非脑梗死组48例,比较两组临床资料、颈动... 详细信息

目的探讨颈动脉超声联合ABCD3-Ⅰ评分及血清miR-146a预测短暂性脑缺血发作(TIA)后继发脑梗死的临床应用价值。方法选取我院收治的90例TIA患者,根据TIA后30 d内是否继发脑梗死分为脑梗死组42例和非脑梗死组48例,比较两组临床资料、颈动脉狭窄程度、ABCD3-Ⅰ评分及血清miR-146a的差异。采用Logistic回归分析筛选TIA后继发脑梗死的独立危险因素;绘制受试者工作特征(ROC)曲线分析颈动脉狭窄程度、ABCD3-Ⅰ评分、血清miR-146a单独及联合应用预测TIA后继发脑梗死的诊断效能。结果脑梗死组与非脑梗死组颈动脉狭窄程度、ABCD3-Ⅰ评分和血清miR-146a比较,差异均有统计学意义(均P<0.05)。Logistic回归分析显示,颈动脉狭窄程度、ABCD3-Ⅰ评分和血清miR-146a均为TIA后继发脑梗死的独立危险因素(OR=2.807、2.680、2.762,均P<0.05)。ROC曲线分析显示,颈动脉狭窄程度、ABCD3-Ⅰ评分和血清miR-146a预测TIA后继发脑梗死的曲线下面积分别为0.892、0.854和0.889,其联合应用的曲线下面积为0.925。结论颈动脉超声联合ABCD3-Ⅰ评分及血清miR-146a在预测TIA后继发脑梗死中具有较好的临床应用价值。

关键词：超声检查,颈动脉 ABCD3-Ⅰ评分血清miR-146a 短暂性脑缺血发作脑梗死预测价值

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Muon Spin Relaxation Study of Frustrated Tm_(3)Sb_(3)Mg_(2)O_(14)with Kagomé Lattice

引用

Chinese Physics Letters 2022年第10期39卷 45-49页

作者： yanxing yang Kaiwen Chen Zhaofeng Ding Adrian D.Hillier Lei Shu State Key Laboratory of Surface Physics Department of PhysicsFudan UniversityShanghai 200438China ISIS Facility STFC Rutherford Appleton LaboratoryChiltonDidcotOxfordshireOX110QXUnited Kingdom Collaborative Innovation Center of Advanced Microstructures Nanjing 210093China Shanghai Research Center for Quantum Sciences Shanghai 201315China

The structure and magnetic properties of rare-earth ions Tm^(3+)Kagomé lattice Tm_(3)Sb_(3)Mg_(2)O_(14)are studied by x-ray diffraction,magnetic susceptibility and muon spin relaxation(𝜇SR)*** existence of a small amount of Tm/Mg site-mixing disorder is *** magnetic susceptibility measurement shows that Tm^(3+)magnetic moments are antiferromagnetically correlated with a negative Curie-Weiss temperature of−26.3 *** long-range magnetic order nor spin-glass transition is observed by DC and AC magnetic susceptibility,and confirmed by μSR experiment down to 0.1 ***,the emergence of short-range magnetic order is indicated by the zero-field μSR experiments,and the absence of spin dynamics at low temperatures is evidenced by the longitudinal-field μSR *** with the results of Tm_(3)Sb_(3)Zn_(2)O_(14),another Tm-based Kagomé lattice with much more site-mixing disorder,the gapless spin liquid like behaviors in Tm_(3)Sb_(3)Zn_(2)O_(14)can be induced by disorder *** with perfect geometrical frustration are in urgent demand to establish whether QSL exists in this kind of materials with rare-earth Kagomé lattice.

关键词： technique effect susceptibility

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

陕西省延安市成年人群血清n-HDL-C水平参考区间的建立及影响因素分析

引用

现代检验医学杂志 2024年第4期39卷 76-82页

作者：刘亚东成欣李先先雷烨唐姣姣杨延星延安大学附属医院陕西延安716099 延安大学医学院陕西延安716099

目的建立陕西省延安市成年人血清非高密度脂蛋白-胆固醇(non-high-density lipoprotein cholesterol,n-HDL-C)的参考区间并分析影响因素。方法采用随机整体抽样的方法,抽取2023年1~9月陕西省延安市10个乡镇16921例成人为研究对象。调查... 详细信息

目的建立陕西省延安市成年人血清非高密度脂蛋白-胆固醇(non-high-density lipoprotein cholesterol,n-HDL-C)的参考区间并分析影响因素。方法采用随机整体抽样的方法,抽取2023年1~9月陕西省延安市10个乡镇16921例成人为研究对象。调查年龄、性别、吸烟、饮酒、锻炼、高血压、糖尿病、血脂异常、慢性病、居住、饮食习惯、婚姻状况、文化程度、月收入等。测量身高、体重、腰围和血压。检测血清三酰甘油(TG)、总胆固醇(TCHO)、高密度脂蛋白-胆固醇(HDL-C)、低密度脂蛋白-胆固醇(LDL-C)、载脂蛋白A1(ApoA1)、载脂蛋白B(ApoB)及脂蛋白a[Lp(a)]水平,计算n-HDL-C水平,n-HDL-C(mmol/L)=TCHO(mmol/L)-HDL-C(mmol/L)。按照WS/T402-2012《中华人民共和国卫生行业标准》建议的百分位数法计算95%参考区间(P_(2.5)~P_(97.5))。采用多因素Logistic回归分析影响血清n-HDL-C水平的影响因素。结果男性和女性血清n-HDL-C水平均呈非正态分布(S=2.119,2.091,均P60岁血清n-HDL-C水平[2.98(2.50,3.37)mmol/L]与18~30岁[2.84(2.49,3.26)mmol/L],31~40岁[2.98(2.62,3.42)mmol/L],41~50岁[3.10(2.62,3.47)mmol/L]和51~60岁[3.05(2.64,3.46)mmol/L]比较,差异具有统计学意义(H=3.618~5.680,均P60岁血清n-HDL-C水平[2.98(2.57,3.34)mmol/L]与18~30岁、31~40岁、41~50岁比较,差异具有统计学意义(H=7.985~14.018,均P60岁(1.86~3.91mmol/L);女性18~50岁(1.82~3.74mmol/L),>50岁(1.94~3.88mmol/L)。将纳入的16921例成人分为n-HDL-C水平正常组和异常组,两组血清TG(1.02±0.31 mmol/L vs 1.24±0.37mmol/L),TCHO(3.97±1.02 mmol/L vs 4.66±1.25 mmol/L),LDL-C(2.37±0.58mmol/L vs 2.59±0.67 mmol/L)水平及年龄(43.55±11.52岁vs 46.27±8.13岁)比较,差异具有统计学意义(t=2.041~3.151,均P<0.05),血清n-HDL-C水平异常率42.50%。经多因素Logistic回归分析,男性、锻炼缺乏、超重和肥胖、血脂异常、城市居民、高中及以上学历是该地区成年人血清n-HDL-C水平的影响因素(均P<0.05)。结论初步建立了该地区成年人血清n-HDL-C水平参考区间,男性、锻炼缺乏、超重和肥胖、血脂异常、城市居民、高中及以上学历是该地区成年人血清n-HDL-C水平异常的影响因素。

关键词：非高密度脂蛋白胆固醇成年人群参考区间延安地区

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Optimizing 3d spin polarization of CoOOH by in situ Mo doping for efficient oxygen evolution reaction

引用

Carbon Energy 2024年第1期6卷 236-244页

作者： Zhichao Jia yang Yuan yanxing Zhang Xiang Lyu Chenhong Liu Xiaoli yang Zhengyu Bai Haijiang Wang Lin yang Key Laboratory of Green Chemical Media and Reactions School of Chemistry and Chemical EngineeringCollaborative Innovation Center of Henan Province for Green Manufacturing of Fine ChemicalsMinistry of EducationHenan Normal UniversityXinxiangHenanChina School of Physics Henan Normal UniversityXinxiangHenanChina Oak Ridge National Laboratory Electrification and Energy Infrastructures DivisionOak RidgeTennesseeUSA Department of Mechanical and Energy Engineering Key Laboratory of Energy Conversion and Storage TechnologiesSouthern University of Science and TechnologyShenzhenGuangdongChina

Transition-metal oxyhydroxides are attractive catalysts for oxygen evolution reactions(OERs).Further studies for developing transition-metal oxyhydroxide catalysts and understanding their catalytic mechanisms will benefit their quick transition to the next ***,Mo-doped CoOOH was designed as a high-performance model electrocatalyst with durability for 20 h at 10 mAcm−***,it had an overpotential of 260 mV(glassy carbon)or 215 mV(nickel foam),which was 78 mV lower than that of IrO_(2)(338 mV).In situ,Raman spectroscopy revealed the transformation process of *** using the density functional theory showed that during OER,doped Mo increased the spin-up density of states and shrank the spin-down bandgap of the 3d orbits in the reconstructed CoOOH under the electrochemical activation process,which simultaneously optimized the adsorption and electron conduction of oxygen-related intermediates on Co sites and lowered the OER *** research provides new insights into the methodical planning of the creation of transition-metal oxyhydroxide OER catalysts.

关键词： electrocatalyst in situ Raman Mo-doped CoOOH oxygen evolution reaction

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Raman phonon anomalies in Sr(Fe_(1-x)Co_(x))_(2)As_(2)

引用

Chinese Physics B 2022年第2期31卷 566-569页

作者： yanxing yang Hewei Zhang Haizheng Zhuang School of Physics Communication and ElectronicsJiangxi Normal UniversityNanchang 330022China Department of Physics New Jersey Institute of TechnologyNewark 07102-1982USA

Phonon anomalies have been reported in iron-pnictide superconductors indicating a diverse interplay between different orders in the ***,we report Raman scattering measurements on Sr(Fe_(1-x)Co_(x))_(2)As_(2)(x=0 and x=0.04)single crystals in the B;symmetry with respect to a 1 Fe unit *** cooling,we observe a larger split(13 cm;)of Eg Raman phonon modes pertaining to in-plane Fe and As displacements as the crystals undergo the tetragonal-toorthorhombic structural phase transition,although a considerable split(9 cm;)has been reported in BaFe_(1-x)Co_(x))_(2)As_(2).Furthermore,the splitting of E;phonon modes is strongly reduced upon *** perform an order-parameter analysis revealing a similar doping dependence of E;phonon splitting as reported in other compounds of the 122 family,indicating these phonon anomalies widely exist in 122 iron-based superconductors and might share the same mechanisms.

关键词： Raman scattering superconductor phonon phase transition

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A privacy-preserving vehicle trajectory clustering framework

引用

Frontiers of Information Technology & Electronic Engineering 2024年第7期25卷 988-1002页

作者： Ran TIAN Pulun GAO yanxing LIU College of Computer Science&Engineering Northwest Normal UniversityLanzhou 730070China

As one of the essential tools for spatio‒temporal traffic data mining,vehicle trajectory clustering is widely used to mine the behavior patterns of ***,uploading original vehicle trajectory data to the server and clustering carry the risk of privacy ***,one of the current challenges is determining how to perform vehicle trajectory clustering while protecting user *** propose a privacy-preserving vehicle trajectory clustering framework and construct a vehicle trajectory clustering model(IKV)based on the variational autoencoder(VAE)and an improved K-means *** the framework,the client calculates the hidden variables of the vehicle trajectory and uploads the variables to the server;the server uses the hidden variables for clustering analysis and delivers the analysis results to the *** IKV’workflow is as follows:first,we train the VAE with historical vehicle trajectory data(when VAE’s decoder can approximate the original data,the encoder is deployed to the edge computing device);second,the edge device transmits the hidden variables to the server;finally,clustering is performed using improved K-means,which prevents the leakage of the vehicle *** is compared to numerous clustering methods on three *** the nine performance comparison experiments,IKV achieves optimal or sub-optimal performance in six of the ***,in the nine sensitivity analysis experiments,IKV not only demonstrates significant stability in seven experiments but also shows good robustness to hyperparameter *** results validate that the framework proposed in this paper is not only suitable for privacy-conscious production environments,such as carpooling tasks,but also adapts to clustering tasks of different magnitudes due to the low sensitivity to the number of cluster centers.

关键词： Privacy protection Variational autoencoder Improved K-means Vehicle trajectory clustering

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：