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A lunar time scale from the perspective of the Moon’s dynamic evolution

Science China Earth Sciences 2024年第1期67卷 234-251页

作者： Dijun GUO Jianzhong LIU James WHEAD fuqin zhang Zongcheng LING Shengbo CHEN Jianping CHEN Xiaozhong DING Jinzhu JI Ziyuan OUYANG State Key Laboratory of Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190China Center for Lunar and Planetary Sciences Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China Department of Earth Environmental and Planetary SciencesBrown UniversityProvidence RI 02912USA Institute of Geology and Geophysics Chinese Academy of SciencesBeijing 100029China Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment Institute of Space SciencesShandong UniversityWeihai 264209China College of Geoexploration Science and Technology Jilin UniversityChangchun 130026China School of Earth Sciences and Resources China University of GeosciencesBeijing 100083China Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China School of Resources and Environmental Engineering Inner Mongolia University of TechnologyHohhot 010051China Center for Excellence in Comparative Planetology Chinese Academy of SciencesHefei 230026China

A geologic time scale is a chronological system that separates the geological strata of a planetary body into different units in temporal sequence and shows its progressive *** time scale of the Moon was established a half-century ago during the telescopic-early Apollo exploration era,using data with limited spatial coverage and *** past decades have seen a wide array of studies,which have significantly extended our understanding of global lunar geologic *** on a comprehensive review of lunar evolution with respect to the dynamical changes,we propose two major updates to the current lunar time scale paradigm to include the evolution of both endogenic and exogenic dynamic forces now known to have influenced early lunar ***,based on the temporal interplay of exogenic and endogenic processes in altering the Moon,we defined three Eon/Eonothem-level units to represent three dynamical evolutionary ***,the pre-Nectarian System is redefined and divided as the magma ocean-era Magma-oceanian System and the following Aitkenian System beginning with the South Pole-Aitken *** ejecta of this basin,Das Formation,was deposited on the primordial lunar crust as the oldest stratum produced from exogenic *** updated lunar time scale,facilitated by the post-Apollo exploration and research advances,provides an integrated framework to depict the evolution of the Moon and has important implications for the geologic study of other terrestrial planets.

关键词： The Moon Geologic time scale Evolution history Endogenic process Exogenic process

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基于炭/炭复合材料加工余料制备碳化硅粉末的组织及性能

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粉末冶金材料科学与工程 2024年第2期29卷 125-132页

作者：喻文瑞张福勤中南大学粉末冶金研究院长沙410083

以炭/炭复合材料加工余料为碳源,与硅粉充分混合,通过高温合成法制备单晶生长用碳化硅粉末,并对其显微组织和表面性能进行研究。结果表明:制备出的碳化硅粉末晶型为β-SiC,部分继承了炭/炭复合材料加工余料的管槽状、脊状结构。在拉曼... 详细信息

以炭/炭复合材料加工余料为碳源,与硅粉充分混合,通过高温合成法制备单晶生长用碳化硅粉末,并对其显微组织和表面性能进行研究。结果表明:制备出的碳化硅粉末晶型为β-SiC,部分继承了炭/炭复合材料加工余料的管槽状、脊状结构。在拉曼光谱中,该粉末的折叠横光与折叠纵光的半峰全宽之比为0.709,其相对纯度高于以石墨粉为碳源同工艺制备的碳化硅粉末。该碳化硅粉末具有多孔特征,比表面积为25.7426 m^(2)/g,可用于物理气相传输单晶生长工艺,且已初步验证其可行性。

关键词：高温合成法单晶生长碳化硅粉末物理气相传输炭/炭复合材料

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基于Snyder希望理论的产前护理教育对产妇分娩创伤发生率及心理弹性的影响

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黑龙江医学 2024年第15期48卷 1876-1878页

作者：郜琼朱智玲张富琴新乡市中心医院产房河南新乡453000 新乡市中心医院预防保健科河南新乡453000

目的:探讨基于Snyder希望理论的产前护理教育对产妇分娩创伤发生率及产妇心理弹性的影响,为临床护理提供依据。方法:选取2022年10月—2023年9月于新乡市中心医院生产的126例产妇作为研究对象,依照护理方式的不同将其分为对照组58例和观... 详细信息

目的:探讨基于Snyder希望理论的产前护理教育对产妇分娩创伤发生率及产妇心理弹性的影响,为临床护理提供依据。方法:选取2022年10月—2023年9月于新乡市中心医院生产的126例产妇作为研究对象,依照护理方式的不同将其分为对照组58例和观察组68例。对照组采用常规护理干预,观察组在常规护理的基础上采用基于Snyder希望理论的产前护理教育干预。比较两组产妇分娩相关知识掌握情况、心理弹性水平、分娩创伤发生率。结果:干预后,两组产妇分娩相关知识掌握程度均有所提升,且观察组高于对照组,差异有统计学意义(χ^(2)=5.578,P0.05)。结论:基于Snyder希望理论的产前护理教育干预能够提升产妇的分娩相关知识掌握程度,提高产妇心理弹性水平,但对降低分娩创伤发生率的作用不明显。

关键词： Snyder希望理论产前护理教育产妇分娩创伤心理弹性

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Effect of Ce on the thermal stability of the Ω phase in an Al-Cu-Mg-Ag alloy

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Rare Metals 2009年第2期28卷 156-159页

作者： Song, Min Xiao, Daihong zhang, fuqin State Key Laboratory of Powder Metallurgy Central South University Changsha 410083 China

This paper studies the effect of Ce on the thermal stability of the Ω phase in an Al-Cu-Mg-Ag alloy by TEM and tensile testing. It has been shown that Ce substantially increases the nucleation density of the Ω phase by acting as the heterogeneous nucleation center. Most impor-tantly,Ce improves the thermal stability of the Ω phase by decreasing the diffusion velocity of Cu atoms and increasing the energy barrier of the thickening ledge nucleation,thus improving the strength of the Al-Cu-Mg-Ag alloy at both ...

关键词： aluminium alloys Ω phase thermal stability Ce addition

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Impact of the Construction of Ecological Civilization Demonstration Areas on Carbon Emission Intensity

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China Economic Transition 2022年第4期5卷 486-519页

作者： WANG Keliang XU Ruyu zhang fuqin MIAO Zhuang School of Economics Ocean University of ChinaQingdao 266100China School of Economics Southwestern University of Finance and EconomicsChengdu 610074China

The development path from attaching importance to environmental protection to the theory of ecological conservation,then to piloting ecological civilization demonstration areas,marks that China’s ecological conservation has gradually moved from theoretical construction to practical exploration,based on the new idea that“lucid waters and lush mountains are invaluable assets.”It is still an ordeal for China’s ecological conservation in the context of global warming how to reduce carbon emission intensity while maintaining sustained economic *** the dual constraints of peaking carbon dioxide emissions before 2030 and achieving carbon neutrality before 2060(“dual carbon”goals),this paper employs the five national ecological civilization pilot demonstration areas(ECDAs)established in 2014 as quasi-natural experiments based on the panel data of 30 Chinese provincial regions from 2003 to *** on the analysis of the policy implementation background and the theoretical mechanism of its impact on carbon emission intensity,the synthetic control method and difference in differences method are adopted to test the impact of the construction of ECDAs on carbon emission intensity and examine the spatial spillover effect of the pilot *** study shows that the construction of ECDAs has significantly reduced carbon emission intensity as a whole,especially in Fujian,Guizhou,and Yunnan ***,the conclusions successfully pass the robustness *** mechanism analysis results demonstrate that the construction of ECDAs can lower carbon emission intensity through the positive incentives from boosting technological progress and developing green finance,and the reversal pressure mechanism of optimizing the energy structure and improving the market *** analysis results of the spatial spillover effect indicate that the construction of ECDAs plays a significant role in reducing carbon emission intensity in the region and its adjacent ***

关键词： construction on ecological conservation carbon emission intensity synthetic control method(SCM) difference in differences(DID)model policy spillover

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Paleomagnetism of early Paleozoic volcanic rocks from the Beishan area,Gansu of northwest China:Preliminary insight into early Paleozoic kinemics of the Beishan terrane

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Chinese Science Bulletin 2002年第18期47卷 1561-1567页

作者： Baochun Huang Yongcheng Wang Rixiang Zhu fuqin zhang Acad Sinica Inst Geol & Geophys Beijing 100101 Peoples R China

We report rock magnetic and paleomagnetic results for Middle Silurian Gongpoquan and Middle Ordo-vician Huaniushan volcanic samples collected from the Ma-zongshan and Hongliuyuan areas of Gansu Province, northwest China. The results indicate that the main magnetic mineral of the Gongpoquan and Huaniushan volcanic rock is magnetite, and it may remain characteristic remanent magnetization acquired at the time of formation of the rocks. However, with the exception of samples from site go20, most of Middle Ordovician Huaniushan volcanic samples have a very weak nature remanent magnetization, and generally show an erratic demagnetization behavior, which does not allow isolation of characteristic remanent magnetizations from these samples. Comparison of paleomagnetic results obtained from the Beishan area of Gansu with Paleozoic apparent polar wander paths for Tarim and Siberia suggests that the Beishan tarrane, the southern part of the Beishan area of Gansu beyond the Mingshui-Shipanjin-Xiaohuang-shan zone,

关键词： Beishan area of Gansu Early Paleozoic rock magnetism and paleomagnetism.

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SHRIMP zircon U-Pb dating of the Gangou granitoids,Central Tianshan Mountains,Northwest China and tectonic significances

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Chinese Science Bulletin 2007年第11期52卷 1507-1516页

作者： SHI YuRuo LIU DunYi zhang Qi JIAN Ping zhang fuqin MIAO LaiCheng Beijing SHRIMP Center Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China

Two types of granitoids,highly deformed augen granitoids and undeformed fine-grained granitoids,are widely distributed in Gangou area,Central Tianshan Mountains,Northwest China. The augen granitoids are high-K calc-alkaline characterized by high K2O,Rb,Y and Th,and low Sr and Sr/Y. They also have high contents of large ion lithophile elements (LILE),such as Ba,Rb,K and Th,and relatively low con-tents of high field strength elements (HFSE),such as Zr,Y and Nb. The fine-grained granitoids are calc-alkaline characterized by high Sr,low Y and HREE,similar to adakitic rocks,and with Na2O/K2O<2 (1.76―1.91),high ISr (0.70689―0.70981),and negative εNd(t ) (-2.4―-5.3). High-precision SHRIMP U-Pb zircon dating results indicate that the Gangou augen granitiods were formed at 428 ± 10 Ma,and the fine-grained granitoids were emplaced at 361―368 Ma. These geochemical and U-Pb zircon data have significant implications for the timing of closure of the Mishigou-Gangou Ocean and the evolution of the Central Tianshan orogenic belt.

关键词：测定年龄小虾地域天山

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Evidence of Nd isotope for unhomogeneity and origin of upper mantle of North China platform

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Chinese Science Bulletin 1999年第6期44卷 556-560页

作者： Jianzhong Liu Ziyuan Ouyang fuqin zhang Shijie Wang Chinese Acad Sci Inst Geochem Guiyang 550002 Peoples R China

Based on isptopic age of Sm-Nd and its initial composition and its evolution obtained during the recent years of archean metamorphic magnesio-ferro the vocanics of upper mantle of the North China platform, it is concluded that the isotopic composition of Archean upper mantle of the North China platform is not homogeneous, and values of /Nd don not change regularly through the whole Archean; in contrast, they present obvious differences in different regions. All this demands that the unhomogeneity of Archean upper mantle of the North China platform inherits initial unhomogeneity of origin, and the origin of the North China platform should contribute to uneven accumulation of planetesimals.

关键词： North China platform initial unhomogeneity Sm-Nd isotope.

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孤独症谱系障碍患儿照顾者疾病获益感影响因素及其与ABA训练效果关系研究

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临床心身疾病杂志 2024年第1期30卷 65-69页

作者：王东明翁娇詹薇殷世龙吴长娣张富芹谢秋蓉陈益专龙岩市第三医院福建龙岩364000

目的探讨孤独症谱系障碍(ASD)患儿照顾者的疾病获益感影响因素及其与患儿应用行为分析(ABA)训练效果之间的关系。方法选取进行ABA训练的ASD患儿及照顾者各50例。采用照顾者疾病获益感量表、简式育儿压力问卷、疾病家庭负担量表、社会支... 详细信息

目的探讨孤独症谱系障碍(ASD)患儿照顾者的疾病获益感影响因素及其与患儿应用行为分析(ABA)训练效果之间的关系。方法选取进行ABA训练的ASD患儿及照顾者各50例。采用照顾者疾病获益感量表、简式育儿压力问卷、疾病家庭负担量表、社会支持评定量表、心理弹性量表及焦虑自评量表评估照顾者的疾病获益感、养育压力、家庭负担、社会支持、心理弹性与焦虑水平,采用行为学观察录像评估照顾者的训练忠诚度,采用孤独症疗效评估量表评估ASD患儿的训练效果。运用Pearson相关分析、中介效应检验等进行数据分析。结果照顾者疾病获益感量表评分为(50.64±18.90)分,简式育儿压力问卷评分为(111.06±28.86)分,疾病家庭负担量表评分为(30.18±13.42)分,社会支持评定量表评分为(30.77±6.86)分,心理弹性量表评分为(49.10±23.23)分,焦虑自评量表评分为(30.54±8.52)分,训练忠诚度得分为(4.19±1.52)分,孤独症疗效评估量表差值为(6.12±4.20)分。照顾者疾病获益感与照顾者育儿压力、家庭负担、焦虑水平呈显著负相关(P<0.05或0.01),与照顾者社会支持水平、心理弹性、家庭人均月收入、训练者忠诚度、孤独症疗效评估量表差值呈显著正相关(P<0.05或0.01);照顾者训练忠诚度与孤独症疗效评估量表差值呈显著正相关(P<0.01)。照顾者疾病获益感在训练忠诚度与训练效果间起中介作用,间接效应显著(效应值为0.048,95%CI为0.013~0.348)。结论在临床中应重视ASD患儿照顾者的疾病获益感,以提升照顾者的训练忠诚度,增强ASD患儿的临床训练效果。

关键词：孤独症谱系障碍疾病获益感照顾者训练疗效

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SHRIMP Zircon U-Pb Dating of Gabbro and Granite from the Huashan Ophiolite,Qinling Orogenic Belt,China: Neoproterozoic Suture on the Northern Margin of the Yangtze Craton

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Acta Geologica Sinica(English Edition) 2007年第2期81卷 239-243页

作者： SHI Yuruo LIU Dunyi zhang Zongqing MIAO Laicheng zhang fuqin XUE Hongmei Beijing SHRIMP Center Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 No. 4 Geological Team Xinjiang Bureau of Geology and Mineral Resources Altay Xinjiang 836500

The recently identified Huashan ophiolitic mélange was considered as the eastern part of the Mianlüe suture in the Qinling orogenic belt. SHRIMP zircon U-Pb geochronology on gabbro from the Huashan ophiolite and granite intruding basic volcanic rocks indicates crystallization ages of 947±14 Ma and 876±17 Ma respectively. These ages do not support a recently proposed Hercynian Huashan Ocean, but rather favor that a Neoproterozoic suture assemblage （ophiolite） is incorporated into the younger （Phanerozoic） Qinling orogenic belt.

关键词： SHRIMP Neoproterozoic Ophiolite Huashan Mianlüe Suture Qinling

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