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Formation of Tibetan Plateau

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China's Tibet 1994年第2期5卷 38-39页

作者： pan yusheng

The Tbetan Platean,called the Roof of the World is a uniqpe highland of our ***让is so high above e level ncientisb like to compare让to the north and south poles,alling it the third pole of the wodd.

关键词： Plateau Tibetan

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消化内镜诊疗后低血糖发生风险及影响因素

循证护理 2024年第8期10卷 1447-1450页

作者：陈连英梁银霞庞雪兰潘玉升韦力予韦薇广西医科大学第一附属医院广西530021

目的:探讨内镜诊疗后禁食病人低血糖发生风险的现状及其影响因素。方法:选取2019年8月—2021年4月入住我院老年病学消化内科的374例内镜诊疗后须禁食的病人为研究对象,收集其一般资料、内镜下治疗方式、禁食时间以及血糖等信息,采用Logi... 详细信息

目的:探讨内镜诊疗后禁食病人低血糖发生风险的现状及其影响因素。方法:选取2019年8月—2021年4月入住我院老年病学消化内科的374例内镜诊疗后须禁食的病人为研究对象,收集其一般资料、内镜下治疗方式、禁食时间以及血糖等信息,采用Logistic回归分析进行影响因素分析。结果:47例病人出现低血糖,低血糖发生率为12.6%;其中体质指数(BMI)、合并糖尿病、禁食时间是内镜诊疗后禁食病人发生低血糖的危险因素(P<0.05)。结论:内镜诊疗术后禁食病人若合并糖尿病、低BMI或禁食时间较长时应给予相应护理措施,及时预防并处理低血糖的发生。

关键词：内镜诊疗禁食病人低血糖影响因素护理

FORMATION AND EUOLUTION OF TETHYS IN THE TIBETAN PLATEAU

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地学前缘 2000年第S1期7卷 334-335页

作者： pan yusheng[WT5,5”BX](Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029,China)

The formation of the Tibetan Plateau is closely related to the evolution of Tethys. There have been many researchers and articles concerning the Tethys since *** proposed the concept in 1893. It means a large ocean which lies between Eurasia and Gondwanaland. With the development of Tethyan research, some new terms, appeared such as Neo\|Tethys, Paleo\|Tethys, and Proto\|Tethys, representing the Tethys in Mesozoic—Cenozoic, late Paleozoic and early Paleozoic respectively. The trace of an ocean from Sinian to Ordovician was discovered during the scientific expedition and Proto\|Tethys was proposed to name the ocean. Therefore, the Tibetan Plateau is the main scope of the Eastern Tethys. It can be divided c losely related into three zones which represent the main oceanic locations in th ree different *** Northern Tethyan Region lies in the Kunlun and Qilian Mountains, its remnant is the Fifth Suture Zone. It is also the northern boundary of the Tibetan Plateau The rift initiated after the continental basement had been formed in Sinian and gradually developed into an ocean, which was named Proto\|Tethys, the earliest Tethyan ocean known up to now. The petrochemical compositions of pillow lava in this zone show the characteristics of mid\|ocean ridge tholeiite basalt and the pelagic ophiolitic flysch were well developed, indicating a matured ocean. It was closed in Ordovician and Silurian.

关键词： formation and evolution Tethys Tibetan plateau suture zone structural deformation Gondwana land

基于两阶段特征选择和格拉姆角场的配电网拓扑辨识方法

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电力系统自动化 2022年第16期46卷 170-177页

作者：潘毓笙秦超天津大学电气自动化与信息工程学院天津市300072

分布式能源并网、辐射状与环状拓扑混合运行、量测误差等影响因素使得配电网在线拓扑难以准确获得。为此,文中提出了一种基于两阶段特征选择和格拉姆角场(GAF)的配电网拓扑辨识方法。首先,基于XGBoost和最大信息系数的两阶段特征选择方... 详细信息

分布式能源并网、辐射状与环状拓扑混合运行、量测误差等影响因素使得配电网在线拓扑难以准确获得。为此,文中提出了一种基于两阶段特征选择和格拉姆角场(GAF)的配电网拓扑辨识方法。首先,基于XGBoost和最大信息系数的两阶段特征选择方法筛选出不含冗余拓扑特征信息的重要量测。其次,基于GAF特征变换,将一维的配电网时间断面量测数据变换为二维的GAF,在保留时间断面的节点电压分布规律的同时,有效表征节点电压幅值分布中的拓扑特征信息。最后,设计了一种适用于拓扑辨识的三卷积层神经网络模型,凭借卷积和池化的运算特性以及抗噪性,稳定地提取GAF所蕴含的拓扑特征信息,从而准确建立配电网节点电压幅值分布到拓扑的映射关系。通过IEEE 33节点系统验证了所提方法的有效性,并分析了所提方法对不同噪声水平、数据缺失比例以及其他场景的适应性。

关键词：智能配电网拓扑辨识深度学习格拉姆角场卷积神经网络

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中国青藏高原特提斯的形成与演化

地质科学 2010年第1期45卷 92-101页

作者：潘裕生方爱民中国科学院地质与地球物理研究所北京100029

青藏高原的形成是特提斯演化的结果。本文根据区域大地构造演化和沉积学证据,将青藏高原特提斯在时间上划分为3个阶段,即早期、中期和晚期。早期从震旦纪开始至奥陶—志留纪结束,这个阶段的大洋我们称作"原特提斯"。中期从泥盆纪开始至... 详细信息

青藏高原的形成是特提斯演化的结果。本文根据区域大地构造演化和沉积学证据,将青藏高原特提斯在时间上划分为3个阶段,即早期、中期和晚期。早期从震旦纪开始至奥陶—志留纪结束,这个阶段的大洋我们称作"原特提斯"。中期从泥盆纪开始至石炭—二叠纪结束,通常称这个大洋为"古特提斯"。晚期从二叠纪末、三叠纪初开始一直延续到第三纪早期,这个阶段的大洋通常被称作"新特提斯"。在空间上,青藏高原特提斯可以划分为3个区域相,即北区、中区和南区。上述3个阶段完全可以与空间上的3个区域相对应,原特提斯主要发育于北区,大洋消亡后的遗迹残留在青藏高原第5缝合带中,即西昆仑—阿尔金—北祁连缝合带。古特提斯主要发育于中区,大洋消亡后的遗迹残留在青藏高原第3、4缝合带中,即金沙江缝合带和昆仑南缘缝合带。新特提斯主要发育于南区,大洋主洋盆消亡后的遗迹残留在青藏高原第1缝合带中,即雅鲁藏布江缝合带,它的弧后盆地消亡后的遗迹残留在第2缝合带中,即班公湖—怒江缝合带。

关键词：形成与演化特提斯青藏高原构造带

KINEMATICS OF THE ALTUN STRIKE-SLIP FAULT

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Scientia Geologica Sinica 1999年第1期 77-90页

作者： Zhou Yong pan yusheng( Laboratory of Lithosphere Tectonic Evolution, Institute of Geology, Academia Sinica, Beijing 100029)

Altun strike-slip fault system strikes northeast-southwest. Within the fault zones, metamorphism, rheology, progressive plastic and brittle deformations are common. Structural forms, including arcuate structures, strike-slip duplex, flow folds, intrastratal folds, S-C fabrics, shear cleavage, quartz c fabrics and en echelon quartz veins, are representative of the products of tectonic movements. Thisfault system experienced two opposite slip senses of faulting recognized by the integration of macro-micro-structures and petrofabric studies. Since its appearance, Altun strike-slip fault experienced initial sinistral, intermediate dextral and final sinistral displacement. The initial sinistral displacement probably took place in Meso- and Neoproterozoic time. Isotopic dating shows that the Altun fault activated at least at the beginning of Neoproterozoic time. The intermediate dextral offset occurred in the Silurian time and probably continued till the end of Devonian time. The dextral structures are offset and superposed by younger sinistral movements as they superposed on the initial sinistral ones. The final sinistral movement took place in late Carboniferous time. The above facts suggest that Altun strike-slip fault system have reversed its shear sense twice since the onset of its faulting. The above-mentioned structures in conjunction with metamor phism and isotopic dating data provide the framework for the development of this fault system.

关键词： SLIP KINEMATICS OF THE ALTUN STRIKE-SLIP FAULT SW

A module based modeling framework for estimating lunar dust deposition due to human activities

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Chinese Journal of Aeronautics 2024年第2期37卷 501-510页

作者： Chunjian pan College of Automation Engineering Shanghai University of Electric PowerShanghai 200090China

Lunar dust is considered to be one of the top challenges for enabling humans to have extended stays on the *** activities such as module landings and launches,walking,rover operation and construction activities will inevitably produce a significant amount of ***,it is important to estimate the potential range and intensity of dust deposition caused by these activities to minimize dust accumulation over time and for maintenance planning and execution.A modular model that correlates the dust deposition distribution with initial mean dust particle velocity,its mean ejected angle and the total amount of ejected mass is developed for an elementary mechanical *** modular model is further employed to form a modeling framework to estimate dust deposition of a trajectory based activity of similar repeated movements such as the landing process of a lander,walking and rover *** model forms a unified modeling framework for different trajectory-based activities and is shown to predict consistent and physically meaningful ranges and intensities of dust deposition provided reliable data to calibrate the model parameters.

关键词： Lunar dust Dust deposition Lunar lander Lunar construction Model calibration

Analytical Solutions for an Isotropic Elastic Half-Plane with Complete Surface Effects Subjected to a Concentrated/Uniform Surface Load

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Acta Mechanica Solida Sinica 2024年第3期37卷 371-384页

作者： Xia-Hui pan School of Civil Engineering Henan Polytechnic UniversityJiaozuo454003China

Within the context of Gurtin-Murdoch surface elasticity theory,closed-form analytical solutions are derived for an isotropic elastic half-plane subjected to a concentrated/uniform surface *** the effects of residual surface stress and surface elasticity are *** stress function method and Fourier integral transform technique are *** solutions are provided in a compact manner that can easily reduce to special situations that take into account either one surface effect or none at *** results indicate that surface effects generally lower the stress levels and smooth the deformation profiles in the *** elasticity plays a dominant role in the in-plane elastic fields for a tangentially loaded half-plane,while the effect of residual surface stress is fundamentally crucial for the out-of-plane stress and displacement when the half-plane is normally *** the remaining situations,combined effects of surface elasticity and residual surface stress should be *** results for a concentrated surface force serve essentially as fundamental solutions of the Flamant and the half-plane Cerruti problems with surface *** solutions presented in this work may be helpful for understanding the contact behaviors between solids at the nanoscale.

关键词： Surface effects Residual surface stress Surface elasticity Half-plane Analytical solutions

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黑云母-斜方辉石温度计的重新标度及其应用

岩石学报 1999年第3期15卷 463-468页

作者：吴春明潘裕生王凯怡中国科学院地质研究所北京100029

黑云母斜方辉石是较为常见的共生矿物对，它们之间Ｆｅ Ｍｇ交换模式反应的标准熵变与标准体积变化量之比很大，具备了构成温度计的必要条件。根据ＦｏｎａｒｅｖａｎｄＫｏｎｉｌｏｖ的平衡实验数据，考虑了黑云母、斜... 详细信息

黑云母斜方辉石是较为常见的共生矿物对，它们之间Ｆｅ Ｍｇ交换模式反应的标准熵变与标准体积变化量之比很大，具备了构成温度计的必要条件。根据ＦｏｎａｒｅｖａｎｄＫｏｎｉｌｏｖ的平衡实验数据，考虑了黑云母、斜方辉石中Ｆｅ Ｍｇ的非理想混合效应，得出了合理的黑云母、斜方辉石中Ｆｅ Ｍｇ的交换能数据。此外还采纳了Ｄａｓｇｕｐｔａ等关于黑云母活度的数据、ｖｏｎＳｅｃｋｅｎｄｏｒｆｆａｎｄＯ＇Ｎｅｉｌｌ关于斜方辉石活度的数据和ＰａｔｔｉｎｏＤｏｕｃｅ等关于黑云母中ＡｌⅥ、Ｔｉ对黑云母活度效应的数据，重新标度了黑云母斜方辉石温度计。该温度计重现实验温度的误差为±６０℃，应用于天然岩石的温度计算误差一般小于±７０℃，适用于绿帘角闪岩相至麻粒岩相的变质岩变质温度的估算。

关键词：黑云母斜方辉石地质温度计标度