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Constraints of palaeoenvironment on organic matter of Benxi Formation shale and discussion on enrichment mechanism under different facies

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Frontiers of Earth Science 2024年第1期18卷 148-171页

作者： Qianyang HE Delu li Qiang SUN Jianwen GAO Haibin li xinhu li Xiaochen ZHAO Shaofei WANG Gaozhe JI College of Geology and Environment Xi’an University of Science and TechnologyXi’an 710054China Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation Xi’an University of Science and TechnologyXi’an 710054China Geological Research Institute for Coal Green Mining Xi’an University of Science and TechnologyXi’an 710054China Research Institute of Exploration and Development PetroChina Changqing Oilfield CompanyXi’an 710018China School of Civil Engineering and Architecture Shaanxi University of TechnologyHanzhong 723001China

As a hydrocarbon-rich sedimentary basin in China,the Ordos Basin has enormous potential for shale gas *** shale of the Upper Carboniferous Benxi Formation is rich in organic matter,however,its palaeoenvironment and organic matter enrichment mode are yet to be *** this study,the geochemical characteristics of the shale of the Benxi Formation in the east-central part of the Ordos Basin were analyzed to investigate its *** the same time,the organic matter enrichment modes in different sedimentary facies were compared and *** results indicate that:1)the shale of the Benxi Formation was mainly deposited on the continental margin and strong terrestrial clastic input;2)the deposition period of the Benxi Formation shale had a hot and humid climate with high palaeoproductivity and local volcanic hydrothermal fluid,and a high sedimentation rate with the strong stagnant *** bottom water was in dysoxic conditions and a semi-saline deposition environment;3)multiple factors,such as palaeoproductivity,volcanic hydrothermal,redox conditions,and palaeosalinity interact to influence the enrichment of shale organic matter in Benxi Formation;4)the organic matter enrichment modes of continental,marine-continental transitional,and marine shales can be classified into three types:“production mode”,“hybrid mode of preservation and production”,and“preservation mode”,*** study provides a reference for the organic matter enrichment mode,shale gas formation conditions,and core area evaluation in these marine-continental transitional shales,and also offers new guidance for exploration ideas for shale gas in different sedimentary facies.

关键词： Benxi Formation shale palaeoenvironment organic matter enrichment facies

An annually laminated stalagmite from the eastern Qinghai-Tibetan Plateau provides evidence of climate instability during the early MIS5e in the Asian summer monsoon

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Science China Earth Sciences 2023年第5期66卷 1147-1164页

作者： Tao GAO Pingzhong ZHANG Hai CHENG Leilei ZHANG xinhu li Hongyu SHI Wei JIA Youfeng NING Hanying li R.Lawrence EDWARDS Key Laboratory of Mineral Resources in Western China(Gansu Province)and School of Earth Sciences Lanzhou UniversityLanzhou730000China Institute of Global Environmental Change Xi’an Jiaotong UniversityXi’an710054China Department of Earth Sciences University of MinnesotaMinneapolis55455USA

The Marine Isotope Stage(MIS5e)is characterized by a warmer climate than that of the pre-industrial period,and serves as an analog for the Current Warm Period(CWP).However,uncertainties persist regarding its climatic ***,we retrieved a stalagmite(WXB075)from Wanxiang Cave in the eastern Qinghai-Tibetan Plateau,and employed abs-olute^(230)Th dating and relative annual layer data to establish a high-precision chronological framework for reconstructing the history of the Asian summer monsoon(ASM)and environmental evolution during early MIS5e with multiple *** findings indicate that the annually laminated stalagmite was formed during Cooling Event 27(C27).The deposition of WXB075 experienced a hiatus(~125.58 ka BP)due to a significant cooling event in the North Atlantic,which may be linked to the unstable climate in the Northern ***,the impact of meltwater discharge in high northern latitudes results in a two-phase evolution of the ASM,i.e.,an initial weaker stage followed by a gradual increase(with exception of deposition hiatus).The climatic instability of ASM is generally characterized by a quasi-60 year cycle that affects vegetation conditions,biological productivity,and karst hydroclimate ***,the increase in meltwater and decrease in temperature in the Northern Hemisphere have led to a weakened ASM and subsequent reduction in ***,vegetation degradation above the cave has occurred along with a slowdown of karst *** vegetation conditions,organic matter content,and wet/drought of the karst hydroclimate were affected by both the large-scale monsoon circulation and local environment during extreme weakening(strengthening)of the monsoon when high-frequency climatic events of ASM occurred.A comparison ofδ^(18)O records between early MIS5e and the past 2000 years reveals that the climate during early MIS5e differed significantly from that of CWP,Medieval Warm Period(MWP),and Dark Age Co

关键词： Eastern Qinghai-Tibetan Plateau Climate instability Wanxiang Cave stalagmite Asian summer monsoon Environmental response Deposition hiatus

Application of GIS-Based Spatial Filtering Method for Neural Tube Defects Disease Mapping

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Wuhan University Journal of Natural Sciences 2007年第6期12卷 1125-1130页

作者： CHI Wenxue WANG Jinfeng li xinhu ZHENG Xiaoying liAO Yilan School of the Earth Sciences and Resources China University of Geosciences Beijing 100083 China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Institute of Urban Environment Chinese Academy of Sciences Xiamen 361003 Fujian China Institute of Population Research Peking University Beijing 100871 China

This study is to assess the prevalence rates spatial pattern of neural tube defects with geographic information system and spatial filtering technique. A total of 80 infants who diagnosed from neural tube defects in the area being studied between 1998 and 2001 were analyzed. Firstly, the geographic information system （GIS） software ArcGIS was used to map the crude prevalence rates. Secondly, the data were smoothed by the method of spatial filtering. We evaluated that the effect of changes in spatial filtering radius size was assessed by creating maps based on various filtering radius sizes. The 3 miles or larger filtering radius gives better section variability than the 2 and 2.5 miles or smaller ones. The maps produced by the spatial filtering technique indicate that prevalence rates in the villages in the southeastern region are to produce higher prevalence than that in the other regions. The smoothed maps based on Heshun County display a more adequate data representation than the raw prevalence rate map.

关键词： birth defects neural tube defects neural tube defects (NTDs) geographic information system (GIS) spatial filtering China

Application of Activity and Wavelet Analysis on Well Logging Sedimentary Cycle Division

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Open Journal of Geology 2013年第2期3卷 62-65页

作者： xinhu li Yuan Guo School of Geology and Environment Xi’an University of Science and Technology Xi’an China

The method of sedimentary cycle division is studied based on comprehensive research and activity analysis of well logging, combined with wavelet analysis and characteristics of stratigraphic cycle. Based on the method above, this paper divided stratigraphic cycles and finely classified the tratifigraphic by taking H1518 in HSS oilfield as an example. The result shows that sedimentary cycle can be divided effectively based on key stratum study, activity and wavelet analysis of well log, and the research of sedimentary cycle characteristics. H1 formation can be divided into 1 sand group, 3 sand layers and 7 single layers.

关键词： Well Logging Activity Sedimentary Cycle Wavelet Transform

Dynamic analysis of urban spatial expansion and its determinants in Xiamen Island

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Journal of Geographical Sciences 2011年第3期21卷 503-520页

作者： li xinhu liN Tao ZHANG Guoqin XlAO lishan ZHAO Qianjun CUI Shenghui Key Lab of Urban Environment and Health Institute of Urban Environment CAS Xiamen Key Lab of Urban Metabolism Xiamen 361021 Fujian China Institute of Remote Sensing Applications CAS Beijing 100101 China

Most of the world＇s cities are concentrated in coastal areas. As a special geographical component of the coastal system, island urban spatial expansion is the outcome of interactions between city development and the physical environment. This paper takes Xiamen Island, located in Southeastern China, as an example to analyze island urban spatial expansion and its determinants by combining an analysis of the literature on urban development policies, urban overall plans, population growth and industrial development, with geographical information analysis using historical maps and remote sensing photographs. Firstly, we reviewed the history of the Xiamen City development during the last 100 years, which can be divided into four periods： the embryonic modern city and early development from 1908 to 1949; administrative boundary expansion and infrastructure development from 1950 to 1979; special economic zone construction and rapid urbanization from 1980 to 2003; and Bay City construction since 2003. The dynamic changes to the coastline, island shape, built-up area, transportation, administrative division, and major land use type conversion which occurred during approximately the past 100 years were analyzed and the characteristics of the island urban spatial expansion were concluded： early expansion from a central point, followed by expansion along a section of coastline, and expansion from the coastline inland. Secondly, we discussed the potential determinants of island urban spatial expansion including administrative division adjustment, urban master planning revision, industrial development, topographical factors, coastal area reclamation, transportation expansion, and population growth. Finally, the effects of each potential determinant on island urban spatial expansion were concluded. Island urban spatial expansion is the result of a synthesis of natural and socio-economic factors which are not independent but interacting. Built-up area expansion is the major driver

关键词： island urbanization spatial expansion determinants Xiamen

自由搜索算法的投影寻踪模型在湿地芦苇调查中的应用

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生态学报 2013年第22期33卷 7204-7210页

作者：李新虎赵成义中国科学院新疆生态与地理研究所乌鲁木齐83001

针对传统湿地芦苇调查统计方法中的问题,建立了自由搜索的投影寻踪模型,将芦苇的生理特征指标和环境因子指标作为投影指标构建了投影指标函数,通过自由搜索算法优化得到最佳投影方向,由最佳投影指标函数来反映各类芦苇的特征,避免了人... 详细信息

针对传统湿地芦苇调查统计方法中的问题,建立了自由搜索的投影寻踪模型,将芦苇的生理特征指标和环境因子指标作为投影指标构建了投影指标函数,通过自由搜索算法优化得到最佳投影方向,由最佳投影指标函数来反映各类芦苇的特征,避免了人为赋予权重的干扰,客观性强,数学概念清晰,并在博斯腾湖芦苇调查统计中进行了应用,结果表明:博斯腾湖芦苇的种类及群落特征没有发生显著的变化,在8个环境因子中水质及水量是影响芦苇产量的主要环境因子,土壤有机质对芦苇产量的影响最小;通过实际应用表明模型应用效果较好,为湿地芦苇资源调查及湿地芦苇的生态保护提供了新的思路。

关键词：投影寻踪自由搜索算法芦苇调查博斯腾湖

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基于大数据挖掘的矿井旋转机械状态评估系统

电子器件 2021年第2期44卷 434-438页

作者：李新虎陕西能源冯家塔矿业运营有限责任公司陕西榆林719400

设备的智能化状态评估和预测维修是构建智慧能源的核心要素之一。以转子动力学、现代信号处理和人工智能技术为基础,开发了基于历史大数据挖掘和人工智能算法的矿井旋转机械状态评估系统。该系统采用分布式数据采集器构建辅机状态监测网... 详细信息

设备的智能化状态评估和预测维修是构建智慧能源的核心要素之一。以转子动力学、现代信号处理和人工智能技术为基础,开发了基于历史大数据挖掘和人工智能算法的矿井旋转机械状态评估系统。该系统采用分布式数据采集器构建辅机状态监测网,通过多源信息深度融合分析技术,实现了矿井旋转机械状态的智能评估。

关键词：状态评估趋势预测人工智能大数据

超超临界1000MW机组无炉水循环泵吹管的蒸汽温度控制策略

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热力发电 2011年第5期40卷 69-72页

作者：李新虎广州粤能电力科技开发有限公司广东广州510600

分析了超超临界1 000 MW机组锅炉无炉水循环泵(BCP)吹管蒸汽超温的原因,提出了在吹管过程中提高给水温度、降低锅炉燃料量和炉膛出口烟气温度,防止过热蒸汽带水等控制蒸汽温度的措施。实施后,可将蒸汽温度控制在锅炉吹管的要求范围内,... 详细信息

分析了超超临界1 000 MW机组锅炉无炉水循环泵(BCP)吹管蒸汽超温的原因,提出了在吹管过程中提高给水温度、降低锅炉燃料量和炉膛出口烟气温度,防止过热蒸汽带水等控制蒸汽温度的措施。实施后,可将蒸汽温度控制在锅炉吹管的要求范围内,实现了超超临界1 000 MW机组锅炉在无BCP条件下的顺利吹管。

关键词：超超临界 1000MW机组锅炉炉水循环泵吹管蒸汽温度控制

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多目标多测度数据空间抽样方法

地球信息科学学报 2018年第10期20卷 1381-1387页

作者：曹馨李新虎高丽玲刑莉中国科学院城市环境研究所中国科学院城市环境与健康重点实验室厦门市城市代谢重点实验室厦门361021 中国科学院大学北京100049 厦门大学环境与生态学院厦门361102

社会问卷调查往往需要针对多目标测度不同类型的数据,而传统的抽样方法主要针对单目标对象,且数据类型为数值型数据。本研究以厦门岛出行调查为例,调查问卷包含了住区特征、居民社会经济状况、就业情况、出行方式、出行目的与时间等方... 详细信息

社会问卷调查往往需要针对多目标测度不同类型的数据,而传统的抽样方法主要针对单目标对象,且数据类型为数值型数据。本研究以厦门岛出行调查为例,调查问卷包含了住区特征、居民社会经济状况、就业情况、出行方式、出行目的与时间等方面的指标,提出了以变异度模型为主的新方法。以厦门岛住区居民出行所带来的能耗问题收集的少量先验问卷信息以及历史数据为基础,通过模型表征测度不同类型变量的空间变异性,将其作为空间分层的依据从而完成抽样布点方案,评价精度通过抽样方差进行。结果表明:(1)综合多种因素分层可以灵活地解决调查中涉及类别数据以及数值型数据的问题,将影响抽样问题的各类型因素体现到样点空间布点方案中,扩大三明治空间抽样的应用范围;(2)三明治空间抽样各层样点的分布以及容量受层变异度值(相当于方差)的影响,但其样本容量并不是简单随着区域的层变异度值的增大而增大,空间抽样样本容量同时受到多个因素的影响,其地理空间的大小也是其中一个影响因素;(3)变异度模型成功地量化了各种类型数据,通过少量的预调查得到更详细的抽样方案,其抽样精度为0.0002,样本容量35,满足了问卷调查的目标需求并将抽样样本容量控制在合理的范围之内。

关键词：多目标抽样多类型数据变异度社会问卷调查厦门岛