检索结果-南通市图书馆

Dynamics of thinning and destruction of the continental cratonic lithosphere: Numerical modeling

Science China Earth Sciences 2018年第7期61卷 823-852页

作者： mingqi liu Zhonghai LI Key Laboratory of Computational Geodynamics College of Earth and Planetary Sciences University of Chinese Academy of Sciences Institute of Geology Chinese Academy of Geological Sciences

Thinning of the cratonic lithosphere is common in nature, but its destruction is not. In either case, the mechanisms for both thinning and destruction are still widely under debate. In this study, we have made a review on the processes and mechanisms of thinning and destruction of cratonic lithosphere according to previous studies of geological/geophysical observations and numerical simulations, with specific application to the North China Craton(NCC). Two main models are suggested for the thinning and destruction of the NCC, both of which are related to subduction of the oceanic lithosphere. One is the "bottom-up" model, in which the deeply subducting slab perturbs and induces upwelling from the hydrous mantle transition zone(MTZ). The upwelling produces mantle convection and erodes the bottom of the overriding lithosphere by the fluid-meltperidotite reaction. Mineral compositions and rheological properties of the overriding lithospheric mantle are changed, allowing downward dripping of lithospheric components into the asthenosphere. Consequently, lithospheric thinning or even destruction occurs. The other is the "top-down" model, characterized by the flat subduction of oceanic slab beneath the overriding cratonic lithosphere. Dehydration reactions from the subducting slab would significantly hydrate the lithospheric mantle and decrease its rheological strength. Then the subduction angle may be changed from shallow to steep, inducing lateral upwelling of the asthenosphere. This upwelling would heat and weaken the overriding lithospheric mantle, which led to the weakened lithospheric mantle dripping into the asthenosphere. These two models have some similarities, in that both take the subducting oceanic slab and relevant fluid migration as the major driving mechanism for thinning or destruction of the overriding cratonic lithosphere. The key difference between the two models is the effective depth of the subducting oceanic slab. One is stagnation and flattening in t

关键词： Lithospheric thinning Cratonic destruction Big mantle wedge Plate subduction Fluid migration Numericalmodeling

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

Material transportation and fluid-melt activity in the subduction channel: Numerical modeling

引用

Science China Earth Sciences 2015年第8期58卷 1251-1268页

作者： LI ZhongHai liu mingqi Taras GERYA State Key Laboratory of Continental Tectonics and Dynamics Institute of Geology Chinese Academy of Geological Sciences Institute of Geophysics Department of Earth SciencesETH-Zurich

The subduction channel is defined as a planar to wedge-like area of variable size,internal structure and composition,which forms between the upper and lower plates during slab subduction into the *** materials in the channel may experience complex pressure,temperature,stress and strain evolution,as well as strong fluid and melt activity.A certain amount of these materials may subduct to and later exhume from>100 km depth,forming high to ultra-high pressure rocks on the surface as widely discovered in *** deformation in the channel is strongly assisted by metamorphic fluids activities,which change composition and mechanical properties of rocks and thus affect their subduction and exhumation *** this study,we investigate the detailed structure and dynamics of both oceanic and continental subduction channels,by conducting highresolution petrological-thermomechanical numerical simulations taking into account fluid and melt *** numerical results demonstrate that subduction channels are composed of a tectonic rock melange formed by crustal rocks detached from the subducting slab and the hydrated mantle rocks scratched from the overriding *** rocks may either extrude sub-vertically upward through the mantle wedge to the crust of the upper plate,or exhume along the subduction channel to the surface near the suture *** on our numerical results,we first analyze similarities and differences between oceanic and continental subduction *** further compare numerical models with and without fluid and melt activity and demonstrate that this activity results in strong weakening and deformation of overriding ***,we show that fast convergence of orogens subjected to fluid and melt activity leads to strong deformation of the overriding lithosphere and the topography builds up mainly on the overriding *** contrast,slow convergence of such orogens leads to very limited deformation of the overriding lithosphere

关键词： subduction channel fluid activity partial melting topography numerical modeling

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

Feature-Based Fusion of Dual Band Infrared Image Using Multiple Pulse Coupled Neural Network

引用

Journal of Beijing Institute of Technology 2019年第1期28卷 129-136页

作者： Yuqing He Shuaiying Wei Tao Yang Weiqi Jin mingqi liu Xiangyang Zhai Key Laboratory of Photoelectronic Imaging Technology and System Ministry of Education of ChinaBeijing Institute of Technology

To improve the quality of the infrared image and enhance the information of the object,a dual band infrared image fusion method based on feature extraction and a novel multiple pulse coupled neural network(multi-PCNN)is *** this multi-PCNN fusion scheme,the auxiliary PCNN which captures the characteristics of feature image extracting from the infrared image is used to modulate the main PCNN,whose input could be original infrared ***,to make the PCNN fusion effect consistent with the human vision system,Laplacian energy is adopted to obtain the value of adaptive linking strength in *** that,the original dual band infrared images are reconstructed by using a weight fusion rule with the fire mapping images generated by the main PCNNs to obtain the fused *** to wavelet transforms,Laplacian pyramids and traditional multi-PCNNs,fusion images based on our method have more information,rich details and clear edges.

关键词： infrared image image fusion dual band pulse coupled neural network(PCNN) feature extraction

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

OGP: A Repository of Experimentally Characterized O-glycoproteins to Facilitate Studies on O-glycosylation

引用

Genomics, Proteomics & Bioinformatics 2021年第4期19卷 611-618页

作者： Jiangming Huang Mengxi Wu Yang Zhang Siyuan Kong mingqi liu Biyun Jiang Pengyuan Yang Weiqian Cao Department of Chemistry and Institutes of Biomedical Sciences Fudan UniversityShanghai 200032China The Fifth People’s Hospital Fudan Universityand the Shanghai Key Laboratory of Medical Epigeneticsthe International Co-laboratory of Medical Epigenetics and MetabolismMinistry of Science and TechnologyFudan UniversityShanghai 200032China NHC Key Laboratory of Glycoconjugates Research(Fudan University) Shanghai 200032China

Numerous studies on cancers, biopharmaceuticals, and clinical trials have necessitated comprehensive and precise analysis of protein O-glycosylation. However, the lack of updated and convenient databases deters the storage of and reference to emerging O-glycoprotein data. To resolve this issue, an O-glycoprotein repository named OGP was established in this *** was constructed with a collection of O-glycoprotein data from different sources. OGP contains 9354 O-glycosylation sites and 11,633 site-specific O-glycans mapping to 2133 O-glycoproteins, and it is the largest O-glycoprotein repository thus *** on the recorded O-glycosylation sites, an O-glycosylation site prediction tool was developed. Moreover, an OGP-based website is already available(http://***/). The website comprises four specially designed and user-friendly modules:statistical analysis, database search, site prediction, and data submission. The first version of OGP repository and the website allow users to obtain various O-glycoprotein-related information, such as protein accession Nos., O-glycosylation sites,O-glycopeptide sequences, site-specific O-glycan structures, experimental methods, and potential O-glycosylation sites.O-glycosylation data mining can be performed efficiently on this website, which will greatly facilitate related studies. In addition, the database is accessible from OGP website(http://***/***).

关键词： O-glycosylation O-glycoprotein repository Site prediction O-glycoprotein related website Data mining

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

矿用低压配电柜温度监测系统设计

引用

煤矿安全 2019年第9期50卷 106-108页

作者：刘明琦北京机床研究所有限公司

在分析射频无线通讯技术的基础上,介绍了Pt100温度传感器的测温原理、温度与电阻转换公式及433 MHz无线模块,利用PLC和433 MHz无线通讯技术设计矿用低压配电柜温度监测系统,实现矿用低压配电柜温度监测和故障报警。

关键词：矿用低压配电柜温度监测系统 Pt100温度传感器 PLC 433 MHz无线通讯

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

肝硬化门静脉高压症患者脾切除术后腹腔内脏血管直径变化分析

引用

中华消化外科杂志 2024年第7期23卷 961-968页

作者：刘明奇田明国宁夏回族自治区人民医院肝胆外科银川750002 海军军医大学附属东方肝胆外科医院上海200438

目的探讨肝硬化门静脉高压症患者脾切除术后腹腔内脏血管直径变化。方法采用回顾性队列研究方法。收集2012年1月至2022年6月宁夏回族自治区人民医院收治的149例肝硬化门静脉高压症行脾切除术患者的临床资料;男115例,女34例;年龄为46(17~... 详细信息

目的探讨肝硬化门静脉高压症患者脾切除术后腹腔内脏血管直径变化。方法采用回顾性队列研究方法。收集2012年1月至2022年6月宁夏回族自治区人民医院收治的149例肝硬化门静脉高压症行脾切除术患者的临床资料;男115例,女34例;年龄为46(17~68)岁。患者术前,术后1周、2周、1个月、3个月、6个月、1年、3年、5年行腹部CT检查,图像三维重建后测量门静脉系统和腹腔内脏动脉系统血管直径。偏态分布的计量资料以M(范围)表示。重复测量数据采用广义线性混合模型分析,估算目标的边际均值以均数±标准误表示。分析术后不同时间点血管直径与术前直径差异采用简单效应,边际均值的多重比较采用连续Bonferroni校正。结果(1)脾切除术前后肝总动脉、肝固有动脉和胃十二指肠动脉直径变化。患者脾切除术前后肝总动脉、肝固有动脉、胃十二指肠动脉直径变化趋势比较,差异均有统计学意义(F=28.66,29.46,8.12,P0.05)。(3)脾切除术前后肠系膜上动脉、右肾动脉和左肾动脉直径变化。患者脾切除术前后肠系膜上动脉、右肾动脉、左肾动脉直径变化趋势比较,差异均有统计学意义(F=8.22,13.21,10.27,P0.05)。结论肝硬化门静脉高压症患者脾切除术后门静脉、脾动脉及腹腔干直径变细,肝总动脉、肝固有动脉、胃十二指肠动脉、肠系膜上动脉及肾动脉直径增粗,该血管直径变化持续达5年。

关键词：肝硬化门静脉高压症腹腔内脏血管直径脾切除术变化

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

人文精神培育与大学生思想政治教育

引用

中国青年研究 2006年第10期 66-68页

作者：刘明奇张巍北京理工大学学生工作处

培养大学生人文精神和对大学生进行思想政治教育,都是为了使大学生树立正确的价值观,抵御不良思想的侵扰。大学生对人文精神有着内在的需求,借助人文精神的培养,能够更加有效地对大学生进行思想政治教育。

关键词：人文精神思想政治教育有机整合大学生

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

职责同构与地方自主性:我国议事协调机构的设置逻辑

引用

北京行政学院学报 2022年第6期 41-51页

作者：张楠迪扬刘明奇中国人民大学公共管理学院北京100872

“职责同构”是对我国政府各层级间职能高度相似机构上下对口、左右对齐的职能配置和机构设置模式的经验描述。以推进职能转变和“放管服”改革协调小组为例,聚焦国务院、四个代表性省份及其所辖市,分析三级议事协调机构的职责同构性和... 详细信息

“职责同构”是对我国政府各层级间职能高度相似机构上下对口、左右对齐的职能配置和机构设置模式的经验描述。以推进职能转变和“放管服”改革协调小组为例,聚焦国务院、四个代表性省份及其所辖市,分析三级议事协调机构的职责同构性和地方自主性设置逻辑。研究发现,总体上议事协调机构的纵向职责同构程度逐级递减,结构同构性高于职责同构性;省级和市级表现出不同的同构性特征,省级注重对上同构,便于政策上传下达,市级更多体现本地特色,便于推进政策执行;通过调节结构与职能同构度,地方得以实现职责同构与地方自主性的有机融合。

关键词：职责同构议事协调机构地方自主性 “放管服”改革

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

实施ISO9000标准,提高企业竞争力

引用

低温与超导 2006年第3期34卷 224-227页

作者：刘明齐施晋生杨阔南京航空航天大学南京210016

ISO9000标准是一种国际认可的质量管理制度。文中通过对企业实施ISO9000标准的调查分析,阐明了ISO9000标准对提高企业管理水平的作用,对企业实施ISO9000标准过程中存在的问题进行深入剖析并提出解决办法和思路,强调持续改进的主导思想,... 详细信息

ISO9000标准是一种国际认可的质量管理制度。文中通过对企业实施ISO9000标准的调查分析,阐明了ISO9000标准对提高企业管理水平的作用,对企业实施ISO9000标准过程中存在的问题进行深入剖析并提出解决办法和思路,强调持续改进的主导思想,将有助于企业不断提高业绩,增强市场竞争能力。

关键词：企业质量管理 ISO9000标准

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

“别指望”:从跨层结构到反预期推论情态

引用

世界华文教学 2024年第1期 320-335页

作者：刘明奇上海师范大学人文学院

“别指望”在现代汉语中有两种用法:一是跨层结构“别指望1”,用于阻止他人抱有期待;二是反预期推论情态成分“别指望2”,用于否定他人意愿预期。“别指望1”和“别指望2”在句法表现、语用功能及焦点成分上具有差异,“别指望2”的情态... 详细信息

“别指望”在现代汉语中有两种用法:一是跨层结构“别指望1”,用于阻止他人抱有期待;二是反预期推论情态成分“别指望2”,用于否定他人意愿预期。“别指望1”和“别指望2”在句法表现、语用功能及焦点成分上具有差异,“别指望2”的情态义由预期语篇解读赋予。“别指望2”主要用于评价语体,表达说话者对命题的否定断言,凸显亲涉事件的高信度。“别指望”在言语行为迁移的作用下,经历了语法化四阶段,在自知事件的意外与感叹基础上,亲涉事件由他反预期进一步推理获得“不可能”含义。“别指望2”处于预期语篇的推理层,与命题层的“不可能”存在本质区别。

关键词：别指望言语行为迁移自知亲涉他反预期语用推理

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：