Petroleum Origins and Accumulation Patterns in the Weixinan Sag in the Beibu Gulf Basin, Using Subsag B as an Example

Crude oil has been discovered in the Paleogene and Neogene units of the Weixinan Sag in the Beibu Gulf Basin. To determine the source and accumulation mode of this crude oil, 12 crude oil samples and 27 source rock samples were collected and an extensive organic geochemical analysis was conducted on them. Based on the geological conditions and the analytical results, the types, origins and accumulation patterns of crude oil in the study area were elucidated. Except for a shallowly-buried and biodegraded crude oil deposit in Neogene rocks, the crude oil samples in the study area were normal. All of the crude oils were derived from lacustrine source rocks. According to biomarker compositions, the crude oils could be divided into two families, A and B, distinctions that were reinforced by differences in carbon isotope composition and spatial distribution. Oil-source correlation analysis based on biomarkers revealed that Family A oils were derived from the mature oil shale at the bottom of the second member of the Liushagang Formation, while the Family B oils formed in the mature shale of the Liushagang Formation. The Family A oils, generated by oil shale, mainly migrated laterally along sand bodies and were then redistributed in adjacent reservoirs above and below the oil shale layer, as well as in shallow layers at high structural positions, occupying a wide distribution range. The Family B oils were generated by other shale units before migrating vertically along faults to form reservoirs nearby, resulting in a narrow distribution range.     

基于二三维地理信息的边境管控地理信息平台设计与实现

基于二三维地理信息数据制作,借助SuperMap iServer发布二三维地图服务,并采用先进的Spring MVC、Ant Design of Vue框架和开源的MySQL数据库,结合某地区边境管控业务需求,开发实现了某边防牧场的人口管理、巡检管理、智能管控和移动端考勤打卡、巡边任务接收、边情汇报以及越界预警等功能....     

ERA5海面气压和风速再分析资料在渤海和北黄海适用性分析

利用渤海和北黄海9个站位浮标的海面10 m气压和风速观测资料对ERA5再分析资料的适用性进行了初步评估。结果表明：海面气压和风速再分析资料与观测资料具有良好的相关性,不同时间尺度的统计结果具有一定差异,累年逐月的相关性优于日均和日极值,极端天气下的相关系数最低。不同时间尺度的统计结果显示,气压再分析资料与观测值的偏差总体为负值,即高压再分析资料较观测值偏弱、低压再分析资料较观测值偏强,二者存在一定的系统性偏差;风速统计结果显示,偏差与风力级别有关,大风速时,风速再分析资料普遍小于观测值。累年逐月再分析资料反映了研究区气压和风速的季节变化特征,偏差也呈现出季节性变化,且冬季的适用性优于夏季;极端天气情况下,气压和风速再分析资料的适用性较差,需要开展进一步的订正处理。     

2020年春季和秋季莱州湾近岸海域营养盐空间分布特征研究

文章基于2020年5月（春季）和10月（秋季）莱州湾近岸海域环境监测数据,研究无机氮（DIN）和活性磷酸盐（DIP）的营养盐空间分布特征,分析海水质量状况和富营养化状况,并完成营养盐与环境因子的相关性分析。研究结果表明：莱州湾海域春季DIN的浓度范围为0.115~1.830 mg/L,呈现近岸高于远岸、西部高于东部的分布特征;秋季DIN的浓度范围为0.009~2.070 mg/L,高值区位于黄河河口附近;春、秋季DIP的浓度范围分别为未检出~0.009 mg/L、0.000 4~0.012 9 mg/L,受我国“控磷”“限磷”等磷负荷消减政策的影响,DIP的浓度一直处于较低水平。受DIN浓度的影响,春、秋季分别有35.7%和30.7%的调查站位超第二类海水水质标准。春季有1.4%的调查站位处于轻度富营养化状态,位于小清河河口附近;秋季有1.6%的调查站位处于轻度富营养化状态,位于黄河河口附近;其他站位均未达到富营养化水平。莱州湾海域营养盐的分布特征与多种环境因子呈现明显的相关性,其空间分布受多因素影响。     

Biofilm formation under high temperature causes the commensal bacteria Bacillus cereus WPySW2 to shift from friend to foe in Neoporphyra haitanensis in vitro model

Although biofilm formation may promote growth, biofilms are not always beneficial to their hosts. The biofilm formation characteristics of Bacillus cereus WPySW2 and its changes at different temperatures were studied. Results show that B. cereus WPySW2 promoted the growth of Neoporphyra haitanensis (an economically cultivated seaweed) at 20 °C but accelerated algal rot at 28 °C. Thicker B. cereus WPySW2 biofilms covered the surface of N. haitanensis thalli at 28 °C, which hindered material exchange between the algae and surrounding environment, inhibited algal photosynthesis and respiration, and accelerated algal decay. Compared with planktonic bacteria, mature biofilm cells had lower energy consumption and metabolic levels. The biofilm metabolic characteristics of B. cereus WPySW2 changed significantly with temperature. High temperature accelerated biofilm maturation, which made it thicker and more stable, allowing the bacteria to easily adapt to environmental changes and obtain greater benefits from their host. High temperature did not affect the production or increased the abundance of toxic metabolites, indicating that the negative effects of B. cereus WPySW2 on algae were not caused by toxins. This study shows that increased temperature can transform a harmless bacterium into a detrimental one, demonstrating that temperature may change the ecological function of phycospheric bacteria by affecting their morphology and metabolism.

     

大数据环境下地质资料的存储策略与文本化导入技术

在分析地质资料文档内容与形式特征的基础上,提出Hadoop大数据环境下的地质资料一体化耦合数据模型与存储策略,分析确定HDFS下地质资料文本化目标格式,并对地质资料原始格式、转换后的文本格式及地质信息的存储方式与模式进行设计;研究常见地质资料格式的文本化实现方式,并构建文本转换技术流程。为大数据环境下地质资料的文本导入提供技术路径,以及大数据环境下文本化地质资料的信息抽取、融合等智能化处理提供统一数据基础,对地质资料大数据分析具有实际意义。     

矩震级及震源机制相似地震的辐射能量差别——2014年鲁甸地震与景谷地震宽频带体波震级的比较

2014年8月3日鲁甸地震和10月7日景谷地震具有相似的矩震级和震源机制,但所造成的灾害却相差甚远。为考察地震辐射能量在这两次地震致灾过程中的作用,本文利用震中距6°~80°范围内记录了鲁甸地震的142个台站、记录了景谷地震的138个台站的宽频带地震记录,计算了累积宽频带体波震级m_(Bc)。结果表明鲁甸地震的m_(Bc)高于景谷地震,因此地震辐射能量的差别对解释两次地震灾害的差别有不可忽视的作用。     

菲律宾林地信息提取及变化分析

以菲律宾为研究区域,对研究区1990年、2017年两个时期的遥感数据进行处理,利用基于阈值的植被指数法提取各种自然和人工林地信息,并对其时空变化特征进行分析.结果表明:菲律宾总林地面积呈减少趋势,其中吕宋岛群再种林年均覆盖变化百分比最大,减少2.4％,米沙鄢岛群再种林年均覆盖变化百分比最大,增加135.2％,棉兰老岛群...     

2001-2016年徐州市区土地利用类型时空演变

本文旨在定量分析徐州市区土地利用类型时空演变特征,为促进徐州市区绿色发展提供依据.以2001-2016年遥感图像为数据源,通过计算土地利用类型转移矩阵与动态度,对徐州市区土地利用类型时空演变进行分析.结果显示2001-2016年徐州市区耕地总体减少17.066 3 km2,减少面积占市区总面积的2.98％;建筑用地增加...     

基于遥感技术的地理乡土活动课程设计——以“认识家乡的土地利用类型”项目式学习为例

项目式学习是培养学生自主探究能力的主要方式之一。本文以人教版八年级地理上册“认识家乡的土地利用类型”为主题,利用不同时期遥感影像对比,通过项目式学习设计综合实践活动,开展乡土地理活动课程,以提高学生的综合思维能力。