检索结果-南通市图书馆

Imaging mantle transition zone discontinuities in southwest China from dense array ambient noise interferometry

Earthquake Science 2018年第5期31卷 301-310页

作者： Jikun Feng Huajian Yao weitao wang Laboratory of Seismology and Physics of Earth's Interior School of Earth and Space SciencesUniversity of Science and Technology of China Mengcheng National Geophysical Observatory University of Science and Technology of China Institute of Geophysics China Earthquake Administration

Body waves retrieved from ambient noise cross-correlation functions（NCFs） have been reported by more and more recent studies in addition to the dominant recovered surface waves. And one of important applications of these recovered body waves is to investigate the structure of discontinuities within the mantle transition zone（MTZ）. In this study, clear body wave phases reflected from the MTZ discontinuities at 410 km and 660 km have been observed on the NCFs in the frequency band of 0.1–0.2 Hz from a dense regional seismic array in southwest China. The original timedomain reflected signals in the NCFs were first converted to the depth-domain NCFs based on a velocity model before they were further stacked spatially within different bins. Then the depth-domain NCFs were stacked to investigate the lateral variations of the MTZ discontinuities, that is, the 410-km and 660-km discontinuities. Our results exhibit a simple and lateral coherent P;P phase and a much more complicated P;P phase along two profiles, which are in good agreement with mineralogical prediction and recent receiver function studies in the same area. This interferometric method can provide stable reflected body wave phases mainly in the frequency band 0.1–0.2 Hz due to the secondary microseism noise, which can be potentially used for high-resolution mantle interface imaging. This approach is also a good complement to traditional imaging methods, such as receiver function imaging.

关键词： ambient noise interferometry mantle transition zone 410-km and 660-km discontinuities reflected body waves southwest China

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

基于全基因组重测序数据的新疆褐牛基因组结构变异检测及群体结构分析

引用

畜牧兽医学报 2024年第8期55卷 3427-3435页

作者：张涛李佳芪胥磊王丹张梦华张涛闫梦婕王玮韬范守民黄锡霞新疆农业大学动物科学学院乌鲁木齐830052 伊犁哈萨克自治州畜牧总站伊宁835099

旨在鉴定新疆褐牛基因组结构变异(structure variation,SVs)特征,并在此基础上探索新疆褐牛培育过程中受到影响的结构变异。本研究基于全基因组重测序数据,利用Manta、Delly、Lumpy三款软件对新疆褐牛及其父母本(瑞士褐牛、哈萨克牛)以... 详细信息

旨在鉴定新疆褐牛基因组结构变异(structure variation,SVs)特征,并在此基础上探索新疆褐牛培育过程中受到影响的结构变异。本研究基于全基因组重测序数据,利用Manta、Delly、Lumpy三款软件对新疆褐牛及其父母本(瑞士褐牛、哈萨克牛)以及中国西门塔尔牛基因组结构变异进行检测,之后利用主成分分析、构建系统发育树和遗传分化指数(F_(ST))将新疆褐牛基因组与其余3个品种进行比较分析。结果显示,4个牛品种共检测出54969个SVs,缺失型变异占比最高(56.59%),插入型变异占比最少(0.03%)。从数量上看,这些SVs在染色体上的分布呈现出随染色体号变大而逐渐减少的趋势。不同品种间存在共有变异和品种特有变异,其中地方品种哈萨克牛拥有的特有SVs数量最多。主成分分析和系统发育树结果发现,新疆褐牛同哈萨克牛和瑞士褐牛具有较近的亲缘关系。经选择信号分析、基因注释和富集分析,挖掘出了一批与产奶性状(PI 4K2A、ELOVL3、ECHS1、SCD、TCF 7L2、PNLIPRP2、BTRC、PLCE 1)、生长发育(BMP6、TLL2、MAPK9、ROR 2)、适应性(PRKC B)以及免疫(GSTO2、GSTO 1)相关的关键基因。本研究从结构变异上解析新疆褐牛的特征,并揭示一些新疆褐牛培育过程中高度分化的基因,为推动新疆褐牛的遗传改良提供了基础资料。

关键词：结构变异全基因组重测序群体结构分析新疆褐牛

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

“邪热不杀谷”的理论探讨

引用

中华中医药杂志 2024年第7期39卷 3293-3296页

作者：王永涛孟虎彪王伟涛马思佳谷劼楠彭彬徐世杰张怀亮中国中医科学院中医基础理论研究所北京100700 中国中医科学院中医药信息研究所北京100700 北京中医药大学北京100029 河南中医药大学第一附属医院郑州450099

文章考镜了“邪热不杀谷”的源流,该理论首见于《伤寒论·辨脉法》,其本义为伤寒误下后邪热内陷,表现饥而不欲食的状态。后世医家在临床实践中,常运用“邪热不杀谷”理论指导治疗,但对病机的认识存在差异,或认为阳明热毒内盛,或认为肾... 详细信息

文章考镜了“邪热不杀谷”的源流,该理论首见于《伤寒论·辨脉法》,其本义为伤寒误下后邪热内陷,表现饥而不欲食的状态。后世医家在临床实践中,常运用“邪热不杀谷”理论指导治疗,但对病机的认识存在差异,或认为阳明热毒内盛,或认为肾中相火浮越于上,或认为胃阴不足、虚火内生等。文章还指出“邪热不杀谷”与邪热杀谷的理论混淆,实为不同医家理解有异。阐释了“邪热不杀谷”的理论内涵,即病理之火不能促进饮食水谷的消化吸收,不能将水谷津液转化成充足的气血。同时,还通过2则医案展示了该理论在现代临床实践中的应用。

关键词：邪热不杀谷邪火不杀谷理论探讨腹泻食欲不振《伤寒论》临床应用源流

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

Benchmark on the accuracy and efficiency of several neural network based phase pickers using datasets from China Seismic Network

引用

Earthquake Science 2023年第2期36卷 113-131页

作者： Ziye Yu weitao wang Yini Chen Institute of Geophysics China Earthquake AdministrationBeijing 100081China Key Laboratory of Earthquake Source Physics China Earthquake AdministrationBeijing 100081China Zhejiang Earthquake Agency Hangzhou 310013China

Seismic phase pickers based on deep neural networks have been extensively used recently,demonstrating their advantages on both performance and ***,these pickers are trained with and applied to different data.A comprehensive benchmark based on a single dataset is therefore ***,using the recently released DiTing dataset,we analyzed performances of seven phase pickers with different network structures,the efficiencies are also evaluated using both CPU and GPU *** based on F1-scores reveal that the recurrent neural network(RNN)and EQTransformer exhibit the best performance,likely owing to their large receptive *** performances are observed among PhaseNet(UNet),UNet++,and the lightweight phase picking network(LPPN).However,the LPPN models are the most *** RNN and EQTransformer have similar speeds,which are slower than those of the LPPN and ***++requires the most computational effort among the *** all of the pickers perform well after being trained with a large-scale dataset,users may choose the one suitable for their *** beginners,we provide a tutorial on training and validating the pickers using the DiTing *** also provide two sets of models trained using datasets with both 50 Hz and 100 Hz sampling rates for direct application by *** of our models are open-source and publicly accessible.

关键词： neural network deep learning seismic phase picking earthquake detection open-source science

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

心脏磁共振对房颤患者左心房/左心耳血栓诊断价值的系统评价与Meta分析

引用

磁共振成像 2024年第1期15卷 106-112页

作者：杨燕石智威王曜昌杜丰夷袁小佳徐彧刘蕾王伟涛陈正光北京中医药大学东直门医院放射科北京100700

目的通过系统评价与Meta分析评估心脏磁共振(cardiac magnetic resonance, CMR)对心房纤颤(atrial fibrillation, AF)患者左心房/左心耳(left atrial/left atrial appendage, LA/LAA)血栓的诊断价值,并分析不同的成像序列下所形成的诊断效能之间的差异。材料与方法从Pub Med、Embase、Web of Science、Cochrane Library、中国知网、万方和维普数据库查找关于经食道超声心动图(transesophageal echocardiography, TEE)或外科病理活检的方法检测AF患者LA/LAA结构内是否存在血栓的研究,同时比较CMR成像与其诊断效能上的差异,检索的时间为2000年至2022年。将这些文献分为四个类别:(1)CMR电影(cine-cardiac magnetic resonance, cine-CMR)成像;(2)对比增强磁共振血管造影(contrast enhanced magnetic resonance angiography, CE-MRA);(3)对比增强CMR(contrast enhanced CMR, CE-CMR)成像;(4)CMR。分别进行统计分析,提取相关的临床数据,利用Stata 17.0、Review Manager 5.3及Meta-Di Sc 1.4等专业数据分析应用软件对患者的医疗记录进行详细统计,并进一步对合并敏感度、特异度、阳性似然比、阴性似然比及诊断比值比的具体数值进行运算,最后绘制了受试者工作特征曲线,同时对曲线下面积(area under the curve,AUC)进行计算得出诊断效能大小。结果共纳入11篇文献,包含868例患者。Meta分析结果显示,各成像方式的合并敏感度、特异度、阳性似然比、阴性似然比、诊断比值比、AUC值如下:cine-CMR分别为92%、93%、12.8、0.08、154、0.93;CE-MRA分别为91%、100%、476.4、0.09、5 044、0.99;CE-CMR分别为96%、100%、247.5、0.04、6 656、1.00;CMR分别为99%、99%、95.1、0.01、7 357、1.00。结论 CMR对AF患者LA/LAA血栓的诊断具备较高的诊断效能。

关键词：心脏磁共振房颤左心房血栓左心耳血栓 Meta分析磁共振成像

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

改进新时代高校地质类专业美育实践的探索

引用

中国地质教育 2024年第2期33卷 11-15页

作者：何晓钟张照黄荣王伟涛中山大学地球科学与工程学院广东广州510275

新时代高校人才培养的要求是德智体美劳五育并举,目标是培育堪当强国建设和民族复兴重任的时代新人。针对当前高校地质类专业人才培养中美育的现状,本文以习近平总书记关于教育的重要论述和美育的重要指示精神为指导,从反思当前高校地... 详细信息

新时代高校人才培养的要求是德智体美劳五育并举,目标是培育堪当强国建设和民族复兴重任的时代新人。针对当前高校地质类专业人才培养中美育的现状,本文以习近平总书记关于教育的重要论述和美育的重要指示精神为指导,从反思当前高校地质类专业美育存在问题不足、改进美育实践的探索和避开美育实践的误区三个方面,提出了加强和改进新时代高校地质类专业美育工作的思路举措。

关键词：人才培养高等学校地质专业美育实践

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

Dextral strike-slip of Sanguankou-Niushoushan fault zone and extension of arc tectonic belt in the northeastern margin of the Tibet Plateau

引用

Science China Earth Sciences 2016年第5期59卷 1025-1040页

作者： LEI QiYun ZHANG PeiZhen ZHENG WenJun CHAI ChiZhang wang weitao DU Peng YU JingXing State Key Laboratory of Earthquake Dynamics Institute of Geology China Earthquake Administration Beijing 100029 China Earthquake Administration of Ningxia Hui Autonomous Region Yinchuan 750001 China

The kinematic characteristics of the Sanguankou-Niushoushan fault（SGK-NSSF） are of great significance to the understanding of the extension of the arc tectonic belt in the northeastern margin of the Tibet Plateau. Using field surveys and various data collection methods, including large-scale geological mapping, measurement of typical topographies, and dating of sedimentary strata, it was determined that the SGK-NSSF exhibits obvious dextral strike-slip characteristics and thus is not a sinistral strike-slip fault, as believed by previous researchers. The results of this study show that the geological boundaries for the Paleozoic, Mesozoic, and Cenozoic eras were all dextrally dislocated by the fault, with the faulted displacements being similar. The maximum strike-slip displacement of the fault, after elimination of topographic effects, was found to be 961±6 m. The Sanguankou fault at the northern section exhibits obvious characteristics of more recent activities, with a series of small gullies having undergone synchronized dextral writhing after traversing the fault. The average horizontal slip rate of the fault since the late Quaternary was determined to be approximately 0.35 mm/a. The pre-existing fold structures formed during the late Pliocene were dislocated by the fault and became ex situ, indicating that dextral strike-slip of the fault could not have occurred prior to the late Pliocene. The maximum displacements and average slip rates were used to estimate the onset time of the dextral strike-slip activities of the fault as being after 2.7 Ma. In this study, the understanding of previous researchers concerning the extension in the northeastern margin of the Tibet Plateau was combined with analyses of the successive relationships between fold deformations and fault activities. This led to the finding that the extension in the northeastern margin of the Tibet Plateau reached the vicinity of the SGK-NSSF during the late Pliocene（~2.7 Ma）, causing regional uplif

关键词： Northeastern margin of Tibet Plateau Sanguankou-Niushoushan fault Dextral strike-slip Tectonic interactions between blocks Arc tectonic belt

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

Multiple seismological evidences of basin effects revealed by Array of Binchuan(ABC), northwest Yunnan, China

引用

Earthquake Science 2018年第5期31卷 281-290页

作者： Yihe Xu Baoshan wang weitao wang Bo Zhang Tianwei Sun Key Laboratory of Seismic Observation and Geophysical Imaging Institute of GeophysicsChina Earthquake Administration School of Earth Sciences and Engineering Nanjing University School of Earth and Space Sciences University of Science and Technology of China

Dense array seismology, which is characterized by large number, densely deployed autonomous geophone/seismographs, has received great concerns worldwide recently, especially after the great success of dense array in Long Beach. One of the biggest curiosity is that if the great success in Long Beach is replicable in China. Hence, we analyze the seismic records from a dense array in Binchuan basin, Yunnan province, which consists of three-component short-period seismographs of three most common domestic models. The Binchuan basin is located near the intersection between the Chenghai-Binchuan fault and the Red River fault,with the latter being the major fault accommodating significant tectonic deformation resulting from eastern extrusion of the Tibetan plateau. Both faults pose serious seismic threats to local residents in Binchuan basin. Basinrange differences, faults, local earthquakes, and a Fixed Airgun Seismic Transmitting Station(FASTS), make the Binchuan basin a perfect experiment site for dense array experiment. The array is named Array of Binchuan(ABC)and the main target is imaging the shallow crustal structure,especially the structure of the basin. To examine the monitoring capability of ABC, we analyze the seismograms to check if they can reveal the basin, the most significant geological feature in the area. Power spectral density analysis,travel time and amplitude analysis of FASTS signals, and amplitude analysis of earthquakes and noise cross-correlation functions are used in the analysis. All the results show correlation with the basin and clear difference between basin and non-basin area. Therefore, the preliminary results support that the ABC has the potential to provide constraints on local structures.

关键词： Array of Binchuan dense array basin effects

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

Cenozoic tectonic evolution of regional fault systems in the SE Tibetan Plateau

引用

Science China Earth Sciences 2022年第4期65卷 601-623页

作者： Yang wang Yuejun wang Peizhen ZHANG Jinjiang ZHANG Bo ZHANG Jing LIU-ZENG Renjie ZHOU weitao wang Huiping ZHANG Zhangjun LI Guangdong Provincial Key Laboratory of Geodynamics and Geohazards School of Earth Sciences and EngineeringSun Yat-Sen UniversityGuangzhou 510275China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China The Key Laboratory of Orogenic Belts and Crustal Evolution School of Earth and Space SciencesPeking UniversityBeijing 100871China Institute of Surface-Earth System Science Tianjin UniversityTianjin 300072China School of Earth and Environmental Sciences The University of QueenslandSt Lucia QLD 4072Australia State Key Laboratory of Earthquake Dynamics Institute of GeologyChina Earthquake AdministrationBeijing 100029China

The SE Tibetan Plateau,tectonically situated in the eastern India-Eurasia oblique convergence zone,has experienced multiple stages of deformation since the *** major tectonic boundaries—the Ailaoshan-Red River,ChongshanLincang-Inthanon,and Gaoligong-Mogok shear zones—delineate the first-order tectonic framework in this *** most striking structural features in the block interiors are a series of NW-and NE-trending fault systems,such as the Dayingjiang,Longlin-Ruili,Nantinghe,Red River,Weixi-Qiaohou,and Lancang-Genma faults,which have conjugate geometric *** this study,we review these structures’geometric and kinematic characteristics and deformation histories.A synthesis of existing geological observations,geomorphological analyses,and chronological data reveals three major Cenozoic tectonothermal events,including crustal shortening,strike-slip shearing,and kinematic *** boundary structures controlled the tectonic extrusion of plateau material during the early Oligocene-early *** the mid-late Miocene,NW-and NE-trending fault systems mostly experienced diachronous slip-sense *** onset and spatial trend of regional kinematic reversal are constrained by existing chronologic *** with geophysical and geodetic observations,the activity and geodynamic drivers of the major fault systems and regional deformation styles are explored,revealing that the SE Tibetan Plateau underwent a transition from discrete(lateral block extrusion)to diffuse deformation in the mid-late *** intracontinental crustal deformation and its coupling with dynamic processes at depth during the plateau growth are discussed in the context of the IndiaEurasia convergence.

关键词： Cenozoic SE Tibetan Plateau tectonic boundary conjugate fault system tectonic evolution

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

基于痰瘀风三因并治的抗痫煎剂治疗癫痫合并焦虑抑郁症患者的临床研究

引用

深圳中西医结合杂志 2024年第2期34卷 23-26页

作者：黄显净王伟涛张永全广西中医药大学广西南宁530000 广西中医药大学附属瑞康医院广西南宁530000

目的:探讨抗痫煎剂联合西酞普兰治疗癫痫伴有焦虑抑郁症状的临床疗效。方法:选取广西中医药大学附属瑞康医院2021年4月至2021年6月就诊的90例癫痫合并有焦虑抑郁症状的患者,随机分为观察组和对照组1、对照组2,每组30例。三组患者均予常... 详细信息

目的:探讨抗痫煎剂联合西酞普兰治疗癫痫伴有焦虑抑郁症状的临床疗效。方法:选取广西中医药大学附属瑞康医院2021年4月至2021年6月就诊的90例癫痫合并有焦虑抑郁症状的患者,随机分为观察组和对照组1、对照组2,每组30例。三组患者均予常规的抗癫痫药物治疗,对照组1患者加用西酞普兰,对照组2患者加用抗痫煎剂,观察组患者加用抗痫煎剂和西酞普兰,比较三组患者治疗效果。结果:治疗后,三组患者汉密尔顿焦虑量表(HAMA)、汉密尔顿抑郁量表(HAMD)评分均较治疗前降低,且观察组患者HAMA、HAMD评分均低于对照组1、对照组2,差异具有统计学意义(P<0.05);观察组有2例患者服药初期出现恶心、腹泻等胃肠道症状,未影响治疗。结论:基于痰瘀风三因并治的抗痫煎剂联合西酞普兰对改善癫痫合并的焦虑抑郁症状疗效优于单纯使用西药或单纯加用抗痫煎剂。

关键词：癫痫焦虑抑郁抗痫煎剂西酞普兰

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

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：