检索结果-南通市图书馆

改进的DeeplabV3Plus高分辨率遥感影像土地覆盖分类

在线全文

学校读者我要写书评

暂无评论

计算机工程与应用 2024年第13期60卷 266-275页

作者：朱凡罗小波重庆邮电大学计算机科学与技术学院重庆400065 重庆邮电大学空间大数据智能技术重庆市工程研究中心重庆400065

高分辨率遥感图像中提取的土地覆盖信息在城市规划建设和土地利用等领域具有巨大的价值,但由于土地覆盖类型复杂、光谱差异性较小等因素,目前对土地覆盖类别进行高质量的语义分割仍然受到一定限制。因此,针对该问题提出了一种新颖的全... 详细信息

高分辨率遥感图像中提取的土地覆盖信息在城市规划建设和土地利用等领域具有巨大的价值,但由于土地覆盖类型复杂、光谱差异性较小等因素,目前对土地覆盖类别进行高质量的语义分割仍然受到一定限制。因此,针对该问题提出了一种新颖的全连接网络MFC-Net,该模型采用全新的基于点积注意力的空洞空间金字塔池化模块(DPA-ASPP),提高了聚合上下文信息方面的能力及效率。更进一步的,针对不同尺度的特征提出了注意力增强融合模块(AEFM)来增强特征表示,改善不同形状和大小地物的分割效果。该模型充分利用了高分辨率遥感影像中丰富的上下文信息及多尺度信息,在LoveDA大型遥感图像数据集上取得了优于当前主流模型的分割结果(84.26%MPA和69.67%MIOU)。

关键词：遥感图像深度学习语义分割土地覆盖分类 LoveDA数据集

Association between glucose levels of children with type 1 diabetes and parental economic status in mobile health application

在线全文

学校读者我要写书评

暂无评论

World Journal of Diabetes 2024年第7期15卷 1477-1488页

作者： Wen-Hao Zhang Chao-fan Wang Hao Wang Jie Tang Hong-Qiang Zhang Jiang-Yu Zhu Xue-Ying Zheng Si-Hui luo Yu Ding Department of Endocrinology The First Affiliated Hospital of University of Science and Technology of ChinaDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei 230001Anhui ProvinceChina Department of Endocrinology and Metabolism The Third Affiliated Hospital of Sun Yat-sen UniversityGuangdong Provincial Key Laboratory of DiabetologyGuangzhou 510000Guangdong ProvinceChina Graduate School Bengbu Medical CollegeBengbu 233000Anhui ProvinceChina

BACKGROUND The glycemic control of children with type 1 diabetes(T1D)may be influenced by the economic status of their *** To investigate the association between parental economic status and blood glucose levels of children with T1D using a mobile health *** Data from children with T1D in China's largest T1D online community,Tang-TangQuan■.Blood glucose levels were uploaded every three months and parental economic status was evaluated based on annual household *** were divided into three groups:Low-income(100000 yuan)(1 Yuan=0.145 United States Dollar approximately).Blood glucose levels were compared among the groups and associations were explored using Spearman’s correlation analysis and multivariable logistic *** From September 2015 to August 2022,1406 eligible children with T1D were included(779 female,55.4%).Median age was 8.1 years(Q1-Q3:4.6-11.6)and duration of T1D was 0.06 years(0.02-0.44).Participants were divided into three groups:Low-income(n=320),middle-income(n=724),and high-income(n=362).Baseline hemoglobin A1c(HbA1c)levels were comparable among the three groups(P=0.072).However,at month 36,the low-income group had the highest HbA1c levels(P=0.036).Within three years after registration,glucose levels increased significantly in the low-income group but not in the middle-income and high-income *** economic status was negatively correlated with pre-dinner glucose(r=-0.272,P=0.012).After adjustment for confounders,parental economic status remained a significant factor related to pre-dinner glucose levels(odds ratio=13.02,95%CI:1.99 to 126.05,P=0.002).CONCLUSION The blood glucose levels of children with T1D were negatively associated with parental economic *** is suggested that parental economic status should be taken into consideration in the management of T1D for children.

关键词： Type 1 diabetes Children and adolescents Glycemic control Economic status Mobile health application

CrN supported by carbon nanosheets as efficient catalysts toward oxygen reduction reaction and Zn-air batteries

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

Rare Metals 2024年第10期43卷 4973-4981页

作者： Ya-Ting Zhang fan Zhang Zhe Lu Jun-Ming luo Su-Yang Feng Qi Wang Hui Chen Hao-Ming Wu Zheng-Pei Miao Bin Chi Neng Yu Cheng-Hang You Jing Li Xin-Long Tian School of Chemistry and Chemical Engineering School of Marine Science and EngineeringHainan Provincial Key Lab of Fine ChemistryHainan University State Power Investment Group Hainan Electric Power Co.Ltd. Key Laboratory of Fuel Cell Technology of Guangdong Province Shenzhen Automotive Research Institute Beijing Institute of Technology State Key Laboratory of Nuclear Resources and Environment East China University of Technology

Exploring non-precious efficient oxygen reduction reaction （ORR） catalysts is of great significance to fuel cells and Zn-air batteries （ZABs）.CrN is a theoretically promising ORR catalyst,but its potential needs to be unlocked by proper supports that provide high conductivity and high exposure of active *** this work,we introduce a novel synthesis of carbon nanosheets-supported CrN nanoparticles （CrN/C） by annealing the mixture of CrCl3,1,10-phenanthroline and melamine via a two-step *** prepared CrN/C materials show good ORR activity and stability in acidic and alkaline *** optimal CrN/C material has an ORR half-wave potential of 0.73 and 0.72 V （*** hydrogen electrode） in acidic and alkaline media,*** it retains 82% and 78% of ORR current density in acidic and alkaline media after durability tests,***,the optimal CrN/C material-based self-breathing ZABs deliver a maximum power density of 168 mW·cm-2,which is one of the highest among transition metal nitrides-based ZABs It is found that the ORR activity of CrN/C materials is highly related to the Cr–N valence *** work highlights the good potential of CrN as robust ORR catalyst and verifies its promising application in ZABs.

关键词： Carbon nanosheets CrN Fuel cells Oxygen reduction reaction Zn-air batteries

Cauliflower-like Ni_(3)S_(2) foam for ultrastable oxygen evolution electrocatalysis in alkaline seawater

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2024年第8期17卷 6820-6825页

作者： Qiuying Dai Xun He Yongchao Yao Kai Dong Xuwei Liu Xiankun Guo Jie Chen Xiaoya fan Dongdong Zheng Yongsong luo Shengjun Sun Luming Li Wei Chu Asmaa Farouk Mohamed SHamdy Xuping Sun Bo Tang Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China College of Chemistry Chemical Engineering and Materials ScienceShandong Normal UniversityJinan 250014China Institute for Advanced Study Chengdu UniversityChengdu 610106China Department of Chemistry College of ScienceKing Khalid UniversityP.O.Box 900461413 AbhaSaudi Arabia Center for High Altitude Medicine West China HospitalSichuan UniversityChengdu 610041China Laoshan Laboratory Qingdao 266237China

It is of great importance to design and develop electrocatalysts that are both long-lasting and efficient for seawater ***,a three-dimensional porous cauliflower-like Ni_(3)S_(2) foam on Ni foam(Ni_(3)S_(2) foam/NF)is proposed as a high-performance electrocatalyst for the oxygen evolution reaction in alkaline *** as-synthesis Ni_(3)S_(2) foam/NF achieves exceptional efficacy,achieving a current density of 100 mA·cm^(−2)at mere overpotential of 369 ***,its electrocatalytic stability extends up to 1000 h at 500 mA·cm^(−2).

关键词： Ni_(3)S_(2)foam oxygen evolution reaction seawater electrolysis electrocatalyst

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

基于基序列构造二元互补序列集

电子与信息学报 2024年第9期46卷 3757-3762页

作者：沈炳声周正春杨洋范平志西南交通大学信息科学与技术学院成都611756 西南交通大学数学学院成都611756

互补序列集凭借其理想的非周期自相关函数特性,在通信与感知领域得到广泛应用。针对互补序列集长度受限的问题,该文以基序列为初始序列,利用级联算子和交织算子提出两类二元互补序列集的新构造方法。所提构造填补了二元互补序列集在特... 详细信息

互补序列集凭借其理想的非周期自相关函数特性,在通信与感知领域得到广泛应用。针对互补序列集长度受限的问题,该文以基序列为初始序列,利用级联算子和交织算子提出两类二元互补序列集的新构造方法。所提构造填补了二元互补序列集在特定长度上的空白,并解决了由Adhikary和Majhi提出的公开问题。

关键词：互补序列集基序列交织算子级联算子

Sanhua Tang(三化汤) protects against ischemic stroke by preventing blood-brain barrier injury: a network pharmacology and in vivo experiments

在线全文

学校读者我要写书评

暂无评论

Journal of Traditional Chinese Medicine 2024年第4期44卷 794-803页

作者： luo Shan YANG fan CHEN Yuanchun ZHAO Ruoxi LIU Haiye GAO Fei MA Wencan GAO Weijuan YU Wentao College of Basic Medicine Hebei University of Chinese MedicineShijiazhuang 050200China Graduate School Hebei University of Chinese MedicineShijiazhuang 050091China College of Acupuncture and Massage Hebei University of Chinese MedicineShijiazhuang 050200China Hebei Key Laboratory of Chinese Medicine Research on Cardio-Cerebrovascular Diseases Shijiazhuang 050091China Hebei International Joint Research Centre for Acupuncture and Moxibustion of Traditional Chinese Medicine Shijiazhuang 050091China

OBJECTIVE:To assess the effect and mechanism of Sanhua Tang(三化汤,SHT)in treating ischemic stroke(IS)through the"Kaitong Xuanfu"theory by using network pharmacology and animal ***:The active ingredients and targets of SHT and IS were screened by public databases such as Traditional Chinese Medicine systems pharmacology,GeneCards,and online mendelian inheritance in *** network topographies were constructed using R,Cytoscape 3.6.0,AutoDockTools,a user-sponsored molecular visualization system on an open-source foundation,and other software to analyze the correlation between targets and active *** middle cerebral artery occlusion(MCAO)model was established by *** were divided into the Sham group,MCAO group(M group),aloe-emodin(AE)group(MCAO rats treated with aloe-emodin),SHT at low dosage(SL group)(MCAO rats treated with SL),SHT at medium dosage(SM group),and SHT at high dosage(SH group).2,3,5-triphenyl tetrazolium chloride staining was used to detect the volume of cerebral infarction;Nissl staining was used to observe the morphology of neuronal cells;transmission electron microscopy was used to observe the integrity of the blood-brain barrier(BBB);enzymelinked immunosorbent assay was used to detect the content of interleukin-6(IL-6),IL-10,tumor necrosis factorα(TNF-α)in *** blot was used to detect the expression of vascular endothelial growth factor A(VEGFA)protein in the cerebral ischemic ***:Using network pharmacology and molecular docking validation,four active ingredients(lignan,naringenin,aloe-rhodopsin,andβ-sitosterol),seven target proteins(protein kinase b 1,IL-6,TNF,VEGFA,TP53,jun proto-oncogene,and cysteinyl aspartate specific proteinase 3),and inflammatory signaling pathways were *** experiments showed that the SH and AE groups had fewer neurological deficits,reduced brain infarct volumes,decreased serum inflammatory factor levels,increased expression of VEGFA protein,and less

关键词：三化汤 damage barrier

Clinical effect of operative vs nonoperative treatment on humeral shaft fractures:Systematic review and meta-analysis of clinical trials

在线全文

学校读者我要写书评

暂无评论

World Journal of Orthopedics 2024年第8期15卷 783-795页

作者： Yang Li Yi luo Jing Peng Jun fan Xiao-Tao Long Department of Traumatic Orthopedics Chongqing General HospitalChongqing UniversityChongqing 401147China Department of Orthopedics Bishan Hospital of ChongqingChongqing 402760China

BACKGROUND Whether operation is superior to non-operation for humeral shaft fracture remains *** hypothesized that operation could decrease the nonunion and reintervention rates and increase the functional *** To compare the clinical efficacy between operative and nonoperative approaches for humeral shaft *** We searched the PubMed,Web of Science,ScienceDirect,and Cochrane databases from 1990 to December 2023 for clinical trials and cohort studies comparing the effects of operative and conservative methods on humeral shaft *** investigators independently extracted data from the eligible studies,and the other two assessed the methodological quality of each *** quality of the included studies was assessed using the Cochrane risk bias or Newcastle-Ottawa *** nonunion,reintervention and the overall complications and functional scores were pooled and analyzed using Review Manager software(version 5.3).RESULTS A total of four randomized control trials and 13 cohort studies were included,with 1285 and 1346 patients in the operative and nonoperative groups,*** in the operative group were treated with a plate or nail,whereas those in the conservative group were managed with splint or functional *** studies were assessed as having a high risk of bias,and the other 13 were of a low risk of bias according to the Newcastle-Ottawa Scale or Cochrane risk bias *** operative group had a significantly decreased rate of nonunion[odds ratio(OR)0.30;95%CI:0.23 to 0.40,reintervention(OR:0.33;95%CI:0.24 to 0.47),and overall complications(OR:0.62;95%CI:0.49 to 0.78)].The pooled effect of the Disabilities of Arm,Shoulder,and Hand score showed a significant difference at 3[mean difference(MD)-8.26;95%CI:-13.60 to-2.92],6(MD:-6.72;95%CI:-11.34 to-2.10),and 12 months(MD:-2.55;95%CI:-4.36 to-0.74).The pooled effect of Visual Analog Scale scores and the Constant-Murley score did not significantly differ between

关键词： Humeral shaft fracture Operation Nonoperation Brace Systematic review

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

重载列车编组与运行对双线桥动力响应的影响

铁道工程学报 2024年第7期41卷 34-40,46页

作者：肖烨罗小勇范亚坤罗亦泳东华理工大学南昌330013 中南大学长沙410075 南昌航空大学南昌330063

研究目的:为研究重载列车编组与运行对双线桥梁动力响应的影响,以朔黄重载铁路线上一座32 m预应力混凝土双线简支T梁为研究对象,建立重载列车-轨道-桥梁耦合有限元模型,并通过现场试验验证有限元模型的准确性,研究重载列车通过双线桥梁... 详细信息

研究目的:为研究重载列车编组与运行对双线桥梁动力响应的影响,以朔黄重载铁路线上一座32 m预应力混凝土双线简支T梁为研究对象,建立重载列车-轨道-桥梁耦合有限元模型,并通过现场试验验证有限元模型的准确性,研究重载列车通过双线桥梁时的动力响应,分析重载列车不同编组方式、重载列车双线对开运行等因素对双线桥梁动力响应的影响规律。研究结论:(1)动力响应计算结果与实测值吻合较好,表明所建立的重载列车-轨道-桥梁耦合有限元模型的可靠性高;(2)重车编组对桥梁的位移响应和动应变影响最大,对加速度的影响最小;空车编组对桥梁的加速度响应最大;空重混编次之,其中重车在前空车在后的混合编组对空车的位移响应影响较大,可能引起空车脱轨;(3)重车空车双线对开运行下桥梁的动力响应随着车速的提高而增加,与重车单线运行下桥梁的动力响应规律相似;在相同车速下,双线对开运行下桥梁的跨中竖向动力响应峰值均比重车单线运行下略大,而横向动力响应峰值比重车单线运行下小;(4)当重车与空车入桥距离差值为车体长度的整数倍时,桥梁的动力响应峰值与重车空车同时上桥时基本相等;当入桥距离差值为车体长度一半的整数倍时,桥梁的动力响应峰值有所降低;(5)本研究成果可为新建重载铁路双线桥梁的设计提供参考。

关键词：列车编组双线桥梁有限元模型现场试验动力响应

在线全文

学校读者我要写书评

暂无评论

基于改进VAE的时间序列数据增强方法

华东理工大学学报（自然科学版） 2024年第3期50卷 400-410页

作者：范振杰罗娜华东理工大学能源化工过程智能制造教育部重点实验室上海200237

基于数据驱动的时间序列预测模型通常需要大量的训练数据,当数据量不足时将导致建模的准确性下降。本文针对时间序列预测中的小样本问题,提出了一种基于改进变分自编码器(Variational Auto-Encoder,VAE)的时间序列数据增强方法,旨在生... 详细信息

基于数据驱动的时间序列预测模型通常需要大量的训练数据,当数据量不足时将导致建模的准确性下降。本文针对时间序列预测中的小样本问题,提出了一种基于改进变分自编码器(Variational Auto-Encoder,VAE)的时间序列数据增强方法,旨在生成和原始数据不同但分布相似的虚拟数据。通过在编码网络中引入多头自注意力机制挖掘原始数据深层特征,为解码网络生成数据时提供全面的特征信息;引入残差连接避免模型出现梯度消失的问题。由于时间序列数据具有趋势与周期性,故在解码网络中引入趋势组件和季节性组件,以准确表示原始数据的时间特性,并且为数据的生成过程赋予时间上的可解释性。为了验证本文方法的有效性,和当前常用的时序数据增强方法进行比较,实验结果表明,该方法在虚拟样本的生成和时间序列回归预测上均具有较好表现。

关键词：小样本数据增强时间序列数据 VAE 可解释性

维普期刊数据库博看期刊