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Three-Dimensional Density Distribution and Seismic Activity along the Guxiang–Tongmai Segment of the Jiali Fault,Tibet

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Acta Geologica Sinica(English Edition) 2024年第2期98卷 454-467页

作者： FAN Pengxiao yu changqing WANG Ruixue ZENG Xiangzhi QU Chen ZHANG yue Institute of Land and Resources Engineering Kunming University of Science and Technology Kunming 650000China Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China Jiangsu Donghai Continental Deep Hole Crustal Activity National Observation and Research StationLianyungangJiangsu 222000China

The Guxiang-Tongmai segment of the Jiali fault is situated northeast of the Namche Barwa Syntaxis in northeastern *** is one of the most active strike-slip faults near the syntaxis and plays a pivotal role in the examination of seismic activity within the eastern Himalayan *** study in the research region has yielded a 1:200000 gravity dataset covering an area 1500 km^(2).Using wavelet transform multiscale decomposition,scratch analysis techniques,and 3D gravity inversion methods,gravity anomalies,fault distributions,and density structures were determined across various *** the integration of our new gravity data with other geophysical and geological information,our findings demonstrate substantial variations in the overall crustal density within the region,with the fault distribution closely linked to these density *** in stratigraphic density are important causes of variations in the capacity of geological formations to endure regional tectonic *** are predominantly concentrated within the density transition zone and are primarily situated in regions of elevated *** hanging wall stress within the Guxiang-Tongmai segment of the Jiali fault exhibits a notable concentration,marked by pronounced anisotropy,and is positioned within the density differential zone,which is prone to earthquakes.

关键词： seismicity deep-density structure wavelet transform multi-scale decomposition scratch analysis 3D gravity inversion Jiali fault Tibet

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反应堆瞬时短周期与反应性引入速率约束问题研究

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核技术 2024年第3期47卷 102-108页

作者：朱贵凤严睿邹杨郁长清赵学超郭建中国科学院上海应用物理研究所上海201800 中国科学院大学北京100049

核反应堆在反应性引入过程中会出现瞬时短周期现象,可能触发周期保护系统,从而出现非必要停堆问题。瞬时短周期受反应性引入速率影响较大,但同时与当前缓发中子先驱核浓度相关,一般难以量化。本文从点堆方程出发,基于两次保守假设,剥离... 详细信息

核反应堆在反应性引入过程中会出现瞬时短周期现象,可能触发周期保护系统,从而出现非必要停堆问题。瞬时短周期受反应性引入速率影响较大,但同时与当前缓发中子先驱核浓度相关,一般难以量化。本文从点堆方程出发,基于两次保守假设,剥离出缓发中子先驱核浓度因素,推导出了简洁的瞬时短周期与反应性引入速率约束公式;并验证在该反应性速率约束下,瞬时短周期永远大于目标周期值,可以避免意外触发周期保护问题,为反应堆运行中的控制棒提升速率约束提供了理论依据。

关键词：核反应堆反应堆周期瞬态反应性

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Seismic response to natural gas anomalies in crystalline rocks

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Science China Earth Sciences 2008年第12期51卷 1726-1736页

作者： YANG WenCai JIN ZhenMin yu changqing Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China Facuty of Earth Sciences China University of GeosciencesWuhan 430074China

According to the geological and seismic reflection data of the Chinese Continental Scientific Drilling (CCSD) main-hole (MH), and the anomalies of CH4, CO2, and He are correlated to the three-component seismic reflectors, especially in horizontal component profiles. However, the seismic response is dif-ficult to be explained as the porosity of crystalline rocks is only about 1% in well section where the gas anomalies occur. Seismic velocity measurement of the MH cores indicated that compared with wa-ter-saturated rock samples, seismic velocity (especially the S-wave) could be distinctly decreased by gas contained in tiny cracks despite of the low porosity, and then notable seismic response could be induced in gas-filled crystalline rocks. It could be predicated that if the porosity of certain rocks in the middle crust rose due to water-rock interaction and had natural gas filled, then there would be more probability for natural gas in top of the mid-crust to fill in the crystalline rocks with increased porosity. In such case, based on the decrease of Swave velocity in crystalline rocks, seismic method could be applied in the future to explore natural gas reservoirs in the middle crust.

关键词： scientific drilling crystalline basement gas anomalies in crust seismic reflection petrophysics

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Possible Water and Ice on the Moon Revealed by Discovery of a Congeliturbated Fan

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Acta Geologica Sinica(English Edition) 2016年第4期90卷 1535-1536页

作者： HAN Tonglin yu changqing CHEN Peng LIN Jingxing Institute of Geology Chinese Academy of Geological Science Geophysics College Chengdu University of Technology

The nature of the Moon＇s surface has always been controversial. American scientists first suggested that there has been water and ice on the Moon （Watson et al., 1961）, a hypothesis supported by some but not other researchers （Compiling Committee, 2006; Ouyang, 2005; Wang, 2010）. So whether there has been or is any water on the Moon or not, is a matter of heated debate.

关键词： Possible Water and Ice on the Moon Revealed by Discovery of a Congeliturbated Fan

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Crustal Poisson's ratio anomalies in the eastern part of North China and their origins

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Geoscience Frontiers 2011年第3期2卷 313-321页

作者： Wencai Yang Chen Qu changqing yu Key Laboratory of Continental Dynamics Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China

Seismic tomography can provide both fine P-wave and S-wave velocity structures of the crust and upper mantle. In addition, with proper computation, Poisson＇s ratio images from the seismic velocities can be determined. However, it is unknown whether Poisson＇s ratio images have any advantages when compared with the P-wave and S-wave velocity images. For the purposes of this study, high- resolution seismic tomography under the eastern part of North China region was used to determine detailed 3-D crustal P- and S-wave seismic velocities structure, as well as Poisson＇s ratio images. Results of Poisson＇s ratio imaging show high Poisson＇s ratio （high-PR） anomalies located in the Hengshan-North Taihang-Zhangjiakou （H-NT-Z） region, demonstrating that Poisson＇s ratio imaging can provide new geophysical constraints for regional tectonic evolution. The H-NT-Z region shows a prominent and continuous high-PR anomaly in the upper crust. Based on Poisson＇s ratio images at different depths, we find that this high-PR anomaly is extending down to the middle crust with thickness up to about 26 kin. According to rock physical property measurements and other geological data, this crustal Poisson＇s ratio anomaly can be explained by Mesozoic partial melting of the upper mantle and basaltic magma underplating related to the lithospheric thinning of the North China craton.

关键词： Seismic tomography North China Craton crust Poisson's ratio anomaly Magma underplating

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Fabrication of edge-curled petals-like covalent organic frameworks and their properties for extracting indole alkaloids from complex biological samples

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Journal of Pharmaceutical Analysis 2022年第1期12卷 96-103页

作者： Fanrong Sun Ligai Bai Mingxue Li changqing yu Haiyan Liu Xiaoqiang Qiao Hongyuan Yan College of Pharmaceutical Sciences Hebei UniversityBaoding071002HebeiChina Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education Baoding071002HebeiChina Institute of Life Science and Green Development Hebei UniversityBaoding071002HebeiChina

In this study,a functionalized covalent-organic framework(COF)was first synthesized using porphyrin as the fabrication unit and showed an edge-curled,petal-like and well-ordered *** synthesized COF was then introduced to prepare porous organic polymer monolithic materials(POPMs).Two composite POPM/COF monolithic materials with rod shapes,referred to as sorbent A and sorbent B,were prepared in stainless steel tubes using different *** A and B exhibited relatively uniform porous structures and enhanced specific surface areas of 153.14 m;/g and 80.01 m;/g,*** prepared composite monoliths were used as in-tube solid-phase extraction(SPE)sorbents combined with HPLC for the on-line extraction and quantitative analytical *** alkaloids(from Catharanthus roseus *** and Uncaria rhynchophylla(Miq.)*** Havil.)contained in mouse plasma were extracted and quantitatively analyzed using the online *** two composite multifunctional monoliths showed excellent clean-up ability for complex biological matrices,as well as superior selectivity for target indole *** validation showed that the RSD values of the repeatability(n=6)were≤3.46%,and the accuracy expressed by the spiked recoveries was in the ranges of 99.38%-100.91%and 96.39%-103.50%for vinca alkaloids and Uncaria alkaloids,***,sorbents A and B exhibited strong reusability,with RSD values≤5.32%,which were based on the peak area of the corresponding alkaloids with more than 100 *** results indicate that the composite POPM/COF rod-shaped monoliths are promising media as SPE sorbents for extracting trace compounds in complex biological samples.

关键词： Covalent organic frameworks Monolithic material Solid-phase extraction Alkaloids Biological samples

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面向照明管理系统的ZigBee网关设计

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数据通信 2024年第3期 28-33页

作者：曹茗雨郁昌青倪海燕邬杨波宁波大学信息科学与工程学院浙江宁波315211

本文设计了一种面向照明管理具有安全机制且适用于现场部署的ZigBee网关,云端管理系统可以同时接入多个智能网关,扩展了照明网络的容量上限。网关在数据传输层对交互数据进行加密,防止第三者对网络的攻击,确保数据安全和照明管理的安全... 详细信息

本文设计了一种面向照明管理具有安全机制且适用于现场部署的ZigBee网关,云端管理系统可以同时接入多个智能网关,扩展了照明网络的容量上限。网关在数据传输层对交互数据进行加密,防止第三者对网络的攻击,确保数据安全和照明管理的安全性,有利于大型照明网络部署以及实施。组建了带有传感器的小型ZigBee网络作为测试,结果表明,设计的ZigBee智能网关满足加密及部署的基本需求,并且系统功能整体稳定、可靠,可实现照明管理系统的精细化管理。

关键词： ZigBee网关照明管理数据加解密 LwIP

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The possible contribution of a mantle-derived fluid to the Ningwu porphyry iron deposits—Evidence from carbon and strontium isotopes of apatites

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Progress in Natural Science:Materials International 2008年第2期18卷 167-172页

作者： Jinjie yu ,Jingwen Mao,changqing Zhang Institute of Mineral Resources,Chinese Academy of Geological Science,Beijing 100037,China Institute of Mineral Resources Chinese Academy of Geological Science Beijing 100037 China

Apatite is a characteristic mineral for the iron deposits in the Ningwu region. Apatite shows a range of d13CPDB values from à9.6& to à0.6&,and most of them with the d13CPDB values distributed in a range of mantle carbon (i.e.,à2& to à9&),except for samples T-06-1 and J-06-3. Apatites in the Ningwu porphyry iron deposits yield a narrow variation range of 87Sr/86Sr values from 0.706326 to 0.707577,similar to those of the volcanic and subvolcanic rocks and higher than that of a typical mantle-derived magmatic apatite (i.e.,about 0.7040),indicating that formation of the apatites was involved with crust material contamination. d13CPDB and 87Sr/86Sr values of the apatite indicate a possible contribution of mantle-derived fluid and material to formation of the Ningwu porphyry iron deposits,supported by regional geology,regional gravities and geochemistry of the volcanic and subvolcanic rocks in the Ningwu region.

关键词： Apatite 87Sr/86Sr ratios Fluid inclusion d13C Mantle fluid and material

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达格列净联合沙库巴曲缬沙坦治疗老年HFpEF患者的临床观察

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重庆医学 2024年第18期53卷 2761-2765页

作者：刘杰任玲刘骁罗文苹刘大伟于长青重庆医科大学附属璧山医院心血管内科重庆402760

目的研究达格列净联合沙库巴曲缬沙坦治疗射血分数保留的心力衰竭(HFpEF)的临床疗效和安全性。方法选取2022年3-12月在本院心血管内科住院的HFpEF患者128例作为研究对象,采用随机数字表法分为观察组与对照组,每组64例。对照组给予常规... 详细信息

目的研究达格列净联合沙库巴曲缬沙坦治疗射血分数保留的心力衰竭(HFpEF)的临床疗效和安全性。方法选取2022年3-12月在本院心血管内科住院的HFpEF患者128例作为研究对象,采用随机数字表法分为观察组与对照组,每组64例。对照组给予常规抗心力衰竭治疗并口服沙库巴曲缬沙坦,观察组在对照组基础上联合应用达格列净,连续治疗12个月。患者于治疗后3、6、12个月完成心脏彩色多普勒超声测定左心室舒张末内径(LVEDd)、左心室射血分数(LVEF),抽血检查氨基末端脑钠肽前体(NT-proBNP)水平,完成6 min步行距离(6MWD)检测。每个月门诊随访,随访内容包括有无不良反应及主要心脏不良事件(MACE)。结果治疗后3个月,两组患者NT-proBNP水平均较治疗前降低,且观察组低于对照组,差异有统计学意义(P0.05)。结论达格列净联合沙库巴曲缬沙坦能够明显改善老年HFpEF患者的心功能,降低MACE发生率,且具有较好的安全性。

关键词：心力衰竭达格列净沙库巴曲缬沙坦再入院

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Reflection attributes of paragneiss in the upper crust

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Science China Earth Sciences 2008年第1期51卷 1-10页

作者： YANG WenCai XU ZhiQin yu changqing Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China

The integrated study of the geological and seismic reflection data from the drilling area of CCSD has discovered that the density and the P-wave velocity of orthogneiss are almost the same as that of the paragneiss in the area; but the orthogneiss and the paragneiss hold different reflection attributes. The strong seismic reflector packes coinciding spatially with the paragneiss suites have implied that the paragneiss buried in the metamorphic crust itself can cause bone-like seismic reflector sets. The P-wave velocity of paragneiss shows little apparent difference with that of the orthogneiss; but its transverse wave velocity is lower, with the Vp/Vs ratios being high. The paragneiss has partially inherited the layering structures and textures of the protolithe of sedimentary rocks, hence shows strong heterogeneity and anisotropy, that is why the paragneiss are able to produce the bone-like reflectors in the upper crust. The low transverse wave velocity of paragneiss often means weak shear resistance, which will further cause cracks or fractures in the rock, consequentially increase its porosity and permeability during tectonic movements, and form the paragneiss reservoirs of low-permeability zones for gases uplifted from the deeper crust. Because the paragneiss in the crustal metamorphic basement can cause the seismic reflectors, seismic reflection sections are able to provide information about the paragneiss under certain prerequisites.

关键词： seismic reflection method metamorphic basement paragneiss crust reflectors

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