检索结果-南通市图书馆

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

模态间匹配学习的高光谱和激光雷达联合分类

遥感学报 2024年第1期28卷 154-167页

作者：杭仁龙孙瑜刘青山南京信息工程大学计算机学院南京210044 江苏省大气环境与装备技术协同创新中心南京210044

如何有效地提取和融合不同模态的特征是高光谱图像和激光雷达数据联合分类的关键。近年来,得益于深度学习强大的特征学习能力,其在高光谱图像和激光雷达数据联合分类领域受到了越来越多的关注。然而,现有的深度学习模型大多基于监督学... 详细信息

如何有效地提取和融合不同模态的特征是高光谱图像和激光雷达数据联合分类的关键。近年来,得益于深度学习强大的特征学习能力,其在高光谱图像和激光雷达数据联合分类领域受到了越来越多的关注。然而,现有的深度学习模型大多基于监督学习的模式,分类性能依赖标注样本的数量和质量。为此,本文提出了一种基于模态间匹配学习的联合分类方法,充分利用未标注样本的信息,减少对标注信息的依赖性。具体而言,本文首先通过高光谱图像和激光雷达数据之间的匹配关系和KMeans聚类算法,构造模态匹配标签。然后,利用该标签训练含有多个卷积层的匹配学习网络。该网络由两个并行分支构成,每个分支负责提取单个模态的特征。最后,以该网络为基础,构造高光谱图像和激光雷达数据联合分类模型。该模型的参数由匹配学习网络进行初始化,因而只需要少量标注样本进行微调即可达到理想的分类效果。为了验证本文方法的有效性,在Houston和MUUFL两个常用的高光谱图像和激光雷达数据联合分类数据集上进行了大量的实验。实验结果表明,与已有的分类模型相比,本文方法能够获得更高的分类性能。

关键词：遥感图像高光谱图像激光雷达数据深度学习匹配学习联合分类

Characteristics of gut microbiota determine effects of specific probiotics strains in patients with functional constipation

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2024年第1期137卷 120-122页

作者： Haohao Zhang Lijuan Sun Zhixin Zhao Yao zhou Yuyao Liu Nannan Zhang Junya Yan Shibo Wang renlong Li Jing Zhang Xueying Wang Wenjiao Li Yan Pan Meixia Wang Bing Luo Mengbin Li Zhihong Sun Yongxiang Zhao Yongzhan Nie State Key Laboratory of Targeting Oncology National Center for International Research of Bio-targeting TheranosticsGuangxi Key Laboratory of Bio-targeting TheranosticsCollaborative Innovation Center for Targeting Tumor Diagnosis and TherapyGuangxi Talent Highland of Bio-targeting TheranosticsGuangxi Medical UniversityNanningGuangxi 530021China State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers and National Clinical Research Center for Digestive Diseases Xijing Hospital of Digestive DiseasesFourth Military Medical UniversityXi’anShaanxi 710032China Key Laboratory of Resource Biology and Biotechnology in Western China Ministry of EducationSchool of MedicineNorthwest UniversityXi’anShaanxi 710000China Key Laboratory of Dairy Biotechnology and Engineering Ministry of EducationKey Laboratory of Dairy Products ProcessingMinistry of Agriculture and Rural AffairsInner Mongolia Key Laboratory of Dairy Biotechnology and EngineeringInner Mongolia Agricultural UniversityHohhotInner Mongolia 010018China

To the Editor:Probiotics are a promising treatment modality for functional constipation(FC);however,the factors affecting individual responses to probiotics remain *** evidence has identified that there is a strong relationship among the gut microbiota and constipation and related gut-brain axis.[1]The gut microbiota may modulate the gut functions via gut metabolites or trigger the release of gut hormones,such as peptide YY,gastric inhibitory polypeptide,and 5-hydroxytryptamine.[2]In turn,gut hormones affect gut secretion,motility,and sensation through their receptors located on epithelial,enteric,and smooth muscle cells.[2]Based on these findings,exogenous probiotics have been used in patients with constipation;however,few have produced consistent results.[3]In this study,we investigated the efficacy and safety of several specific probiotics strains for constipation,and also examined the potential reasons for the individualized effects of probiotics,which may facilitate interventional decisionmaking for FC patients.

关键词： constipation patients sensation

光周期对反刍动物激素分泌、生产性能和繁殖性能影响的研究进展

在线全文

学校读者我要写书评

暂无评论

动物营养学报 2024年第5期36卷 2721-2727页

作者：吕仁龙蒋睿珂张雨书张祎中国热带农业科学院热带作物品种资源研究所海口571101 东北农业大学动物科学技术学院哈尔滨150030 日本信州大学农学研究科上田3994511 河南科技大学动物科技学院洛阳471023

光周期是指昼夜周期中光照期和暗期长短的交替变化,它与不同类型和颜色的光线共同作用后,对动植物和人类生命活动规律产生重要影响。我国幅员辽阔,南北方光照时长差异明显,将这些光周期差异与现代养殖技术和气候变化等相结合应用于生产... 详细信息

光周期是指昼夜周期中光照期和暗期长短的交替变化,它与不同类型和颜色的光线共同作用后,对动植物和人类生命活动规律产生重要影响。我国幅员辽阔,南北方光照时长差异明显,将这些光周期差异与现代养殖技术和气候变化等相结合应用于生产,对促进家畜养殖节本增效和高品质畜产品生产具有重要意义。本文聚焦光周期对反刍动物的影响,主要针对光周期变化对反刍动物体内激素分泌、生产性能(生长性能、肉品质和泌乳性能)、繁殖性能和行为等的影响进行综述,并通过对比相关研究成果进一步解析光周期对反刍动物的综合影响,以期为光周期在反刍动物实际生产中的应用提供指导。

关键词：光周期反刍动物激素水平繁殖性能生产性能

在线全文

学校读者我要写书评

暂无评论

仔猪初生重对肌肉血管生成及代谢组学的影响

家畜生态学报 2024年第8期45卷 33-40页

作者：邹冬彬杨运吕仁龙周汉林胡诚军海南大学生命科学学院海南海口571101 华中农业大学动物科学技术学院武汉430070 中国热带农业科学院热带作物品种资源研究所海南海口571101

试验旨在研究仔猪初生重对肌肉血管生成的影响。将20头新生屯昌黑猪按体重分为正常初生重仔猪(1162±98 g,NBW组)和低初生重仔猪(724±31 g,LBW组),每组10头。仔猪屠宰后,收集仔猪半健肌用于血管生成及代谢物检测。结果表明:(1)与NBW仔... 详细信息

试验旨在研究仔猪初生重对肌肉血管生成的影响。将20头新生屯昌黑猪按体重分为正常初生重仔猪(1162±98 g,NBW组)和低初生重仔猪(724±31 g,LBW组),每组10头。仔猪屠宰后,收集仔猪半健肌用于血管生成及代谢物检测。结果表明:(1)与NBW仔猪相比,LBW仔猪半健肌血管生成标记物血小板-内皮细胞粘附分子1(CD31)、血管生成因子A(VEGF-A)及基质金属蛋白酶9(MMP9)的蛋白质表达水平显著降低(P<0.05)。(2)为进一步探究与肌肉血管生成相关代谢物,运用代谢组学技术筛选两组肌肉中的差异代谢物。发现NBW和LBW仔猪半健肌中差异代谢物主要富集在甘油磷脂代谢通路、不饱和脂肪酸代谢通路、精氨酸和脯氨酸代谢通路。在甘油磷脂代谢通路中,LBW组胆碱、心磷脂、2-酰-sn-甘油-3-磷酸丝氨酸及1-酰-sn-甘油-3-磷酸胆碱等代谢物显著上升(P<0.05);在不饱和脂肪酸代谢通路中,LBW组亚油酸显著下降、十八烷酸显著上升(P<0.05);在精氨酸和脯氨酸代谢通路中,LBW组S-腺苷基-L-甲硫氨酸及鸟氨酸显著下降(P<0.05)。由此可见,LBW仔猪肌肉血管生成降低可能与甘油磷脂代谢通路、不饱和脂肪酸代谢通路、精氨酸和脯氨酸代谢通路中代谢物变化有关。

关键词：血管生成半健肌代谢组学仔猪低初生重

A Commutation Failure Prediction and Mitigation Method

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2022年第3期10卷 779-787页

作者： renlong Zhu Xiaoping zhou Haitao Xia Lerong Hong Hanhang Yin College of Electrical and Information Engineering Hunan UniversityChangsha 410082China

The mitigation of commutation failure(CF)depends on the accuracy of CF *** terms of the large error of the existing extinction angle(EA)calculation during the fault transient period,a method for CF prediction and mitigation is *** in both DC current and overlap angle(OA)are considered in the proposed method to predict the EA *** addition,variations in critical EA and the effect of firing angle(FA)on both DC current and OA are considered in the proposed method to obtain the accurate FA order for the control *** proposed method can achieve good performance in terms of CF mitigation and reduce reactive consumption at the inverter side when a fault *** results based on the PSCAD/EMTDC show that the proposed method predicts CF rapidly and exhibits good performance in terms of CF mitigation.

关键词： Commutation failure prediction commutation failure mitigation line commutated converter based high-voltage direct current(LCC-HVDC) extinction angle(EA) overlap angle(OA) firing angle(FA)

Kidd血型相关SLC14A1基因在肾透明细胞癌中的表达及临床意义

在线全文

学校读者我要写书评

暂无评论

临床输血与检验 2024年第1期26卷 92-100页

作者：周仁龙钟靖唐丹丹深圳市龙华区中心医院输血科 518100 邵阳市中心医院输血科 422000 深圳市南山区医疗集团总部 518000

目的探讨Kidd血型溶质载体家族14基因(solute carrier family 14,SLC14A1)在肾透明细胞(kidney renal clear cell carcinoma,KIRC)中的表达及临床意义。方法运用生物信息学分析方法,联合SANGERBOX、GEPIA、UALCAN、STRING等数据库分析和评估SLC 14A1在KIRC中的表达和临床预后价值。结果Kidd血型SLC 14A1基因在4种肿瘤中观察到了显著上调(P<0.05),在22种肿瘤中观察到了显著下调(P<0.05),其中SLC 14A 1在KIRC组织中mRNA表达水平显著低于正常组织(1.35±1.69 vs 3.90±2.47,P=4.7e-36)。生存分析表明,SLC 14A1表达水平与KIRC总体生存率呈显著正相关(P<0.05)。基于单因素Cox和多因素Cox回归结果分析低表达SLC 14A1是KIRC预后危险因素。KEGG富集分析代谢途径通路占主导地位,GO富集分析吞噬体酸化、三价铁运输、转铁蛋白转运占主导地位。结论Kidd血型SLC 14A1基因在多数KIRC中呈现低表达,与KIRC的发生、发展和预后不良相关,有望作为KIRC诊断、预后判断和治疗靶点。

关键词：肾透明细胞癌 Kidd血型 SLC14A1基因生物信息学癌症基因组图谱

Aryl hydrocarbon receptor nuclear translocator 2 as a prognostic biomarker and immunotherapeutic indicator for clear cell renal cell carcinoma

在线全文

学校读者我要写书评

暂无评论

BIOCELL 2023年第11期47卷 2397-2408页

作者： renlong zhou SHUANG LI XILIN XIAO Department of Public Health Laboratory Sciences University of South ChinaHengyang421001China Department of Blood Transfusion Shenzhen Longhua District Central HospitalShenzhen518000China Bioinformatics R&D Department Hangzhou Mugu Technology Co.Ltd.Hangzhou310000China

Background:In many cancer types,aryl hydrocarbon receptor nuclear translocator 2(ARNT2)has been found to be associated with tumor cell proliferation and ***,the role of ARNT2 in clear cell renal cell carcinoma(ccRCC)has not been completely *** this study,the potential role of ARNT2 in ccRCC development was ***:A pan-cancer dataset(TCGA-TARGET-GTEx)was accessed from UCSC Xena Data ***2 expression in normal and tumor samples was *** Cox regression was performed to evaluate the prognostic value of *** sample gene set enrichment analysis(ssGSEA)was used to estimate the enrichment of functional pathways and gene *** and ESTIMATE methods evaluated the immune *** ARNT2 expression was determined in ccRCC tissue and cell lines using RT-qPCR and Western ***:ARNT2 expression was significantly dysregulated in 23 out of 30 cancer ***-cancer data revealed a strong correlation between ARNT2 expression and immune modulators,immune cell infiltration,and genomic *** ccRCC patients,the low-ARNT2 expression group had higher immune infiltration,CD8 T cells,and programmed cell death ligand 1 expression,as well as higher enrichment score of immunotherapeutic predictors than those in the high-ARNT2 expression ***-ARNT2 expression group was more responsive to ***,low ARNT2 expression was observed in ccRCC tissue and cell ***:Dysregulated ARNT2 expression is involved in cancer development and the modulation of the immune ***2 can be potentially used as a prognostic indicator and an immunotherapeutic indicator for ccRCC.

关键词： Pan-cancer Clear cell renal cell carcinoma Aryl hydrocarbon receptor nuclear translocator 2 Immune microenvironment Immunotherapy

不同青贮时间、水分和添加剂对百香果果皮发酵品质的影响

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

饲料工业 2024年第18期45卷 106-113页

作者：吕仁龙蒋睿珂张雨书李茂周汉林高玲中国热带农业科学院热带作物品种资源研究所海南海口571101 东北农业大学动物科学技术学院黑龙江哈尔滨150030 日本信州大学农学研究科长野松本3994511 中国热带农业科学院湛江实验站广东湛江524013

研究旨在探讨不同青贮时间、水分和添加剂对百香果果皮发酵品质的影响。研究分两个试验进行,试验一:取48个聚乙烯青贮袋,分别装入100 g切碎的百香果果皮混匀后真空密封发酵,然后于发酵第1、3、7、14、21、28、42、56天各开袋6袋,比较营... 详细信息

研究旨在探讨不同青贮时间、水分和添加剂对百香果果皮发酵品质的影响。研究分两个试验进行,试验一:取48个聚乙烯青贮袋,分别装入100 g切碎的百香果果皮混匀后真空密封发酵,然后于发酵第1、3、7、14、21、28、42、56天各开袋6袋,比较营养成分和发酵品质的变化。试验二设定不同水分含量(75%组和85%组)与添加剂(T1为对照组、T2为1/1000 g乳酸菌组和T3为3 mL糖蜜组),以试验一相同方法制备6个青贮发酵处理组,每个处理3个重复,发酵60 d后,分析发酵品质,再用瘤胃体外模拟方法对上述样品进行培养,分析干物质消化率和瘤胃液发酵参数。结果表明:随着发酵时间延长,ph逐渐下降,并在21天时基本达到稳定,乳酸含量逐渐升高,在56天时达到最高。85%组的青贮百香果果皮ph显著低于75%组;两个水分条件下,各处理组乳酸含量均呈现T2>T1>T3(P<0.05)。经体外培养后,尽管75%水分条件下的青贮百香果果皮的干物质消化率显著偏高(P<0.05),但影响程度较小,水分和添加剂不影响瘤胃液发酵参数。综上,百香果皮营养价值较高,易制备青贮,且发酵品质在42 d左右趋于稳定。在85%水分含量下,适当添加乳酸菌后,青贮百香果果皮表现了更加优异的发酵特性和干物质消化率,可以更大发挥其饲料价值。

关键词：百香果果皮青贮动态添加剂消化率

DC Current Order Optimization Based Strategy for Recovery Performance Improvement of LCC-HVDC Transmission Systems

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2023年第3期11卷 1020-1026页

作者： renlong Zhu Xiaoping zhou Shuchen Luo Lerong Hong Hanhang Yin Yifeng Liu College of Electrical and Information Engineering Hunan UniversityChangsha 410082China State Grid Hunan Electric Power Company Limited Economical and Technical Research Institute Changsha 410011China

For the safe and fast recovery of line commutated converter based high-voltage direct current(LCC-HVDC)transmission systems after faults,a DC current order optimization based strategy is *** the constraint of electric and control quantities,the DC current order with the maximum active power transfer is calculated by Thevenin equivalent parameters(TEPs)and quasi-state equations of LCC-HVDC transmission ***,to mitigate the subsequent commutation failures(SCFs)that may come with the fault recovery process,the maximum DC current order that avoids SCFs is calculated through imaginary commutation ***,the minimum value of the two DC current orders is sent to the control *** results based on PSCAD/EMTDC show that the proposed strategy mitigates SCFs effectively and exhibits good performance in recovery.

关键词： Line commutated converter(LCC) high-voltage direct current(HVDC) DC current order calculation subsequent commutation failure(SCF) recovery