文登市国土资源局“四化”加强基层所建设

文登市国土资源局现有职工123人,下辖10个行政科室,3个内设机构,19个直属事业单位.其中包括5个分局和9个国土资源所.     

基于EMD-自适应滤波的干涉图去噪方法研究

提出了一种基于EMD-自适应滤波干涉图去噪方法,该方法基于信号和噪声经过经验模态分解后在不同的IMF上有不同的特征,即先对信号进行经验模态分解,然后对各个高频IMF信号分别选用不同的滤波梯度参数进行自适应滤波处理,从初始干涉图上减去与斑点噪声所对应尺度信息,从而达到噪声抑制的目的。通过实验对比研究了该算法与Goldstein滤波、圆周期中值滤波、EMD分解方法和梯度-自适应滤波去噪的降噪效果。实验表明,该方法不仅能有效地去除InSAR干涉图的噪声,并且能很好地保持相位的细节信息和条纹的边缘信息。     

High Temperature,High Reducibility and Low Productivity of the Paleoceanographic Environment in the P/T,Tethys

In the Permian–Triassic geological history,the Tibet Tethys domain deposited continuous marine carbonate strata and recorded information related to the largest bioextinct events in the life history of the earth(JiChangjun,2018).The complete Permian–Triassic conodont sequence has been established in the northern margin of the Coqin Basin(Zhou Liqian,2012),which provides a time scale for the study of the paleoceanographic environment evolution in the Tibet Tethys field at the turn of the P/T.This work selected the total organic carbon and sulfur content of the rocks,carbon and oxygen isotopes of carbonate rocks,and the organic carbon isotope index system to study the evolution of the paleo marine environment in this period.     

Daytime deposition and nighttime dissolution of calcium carbonate controlled by submerged plants in a karst spring-fed pool: insights from high time-resolution monitoring of physico-chemistry of water

Water temperature, dissolved oxygen (DO), pH, and specific conductivity (spc) were measured in a time interval of 15 min in a karst spring and the spring-fed pool with flourishing submerged plants in Guilin, SW China under dry weather for periods of 2 days. Measurements allowed calculation of calcium and bicarbonate concentrations ([Ca²⁺] and [HCO₃ ⁻]), and thus CO₂ partial pressure ( ) and saturation index of calcite (SIc). Results show that there were not any diurnal variations in the physico-chemical parameters of the water for the spring. However, during daytime periods, pool water decreased to far less than the spring water in a few hours, pH and SIc increased to greater than the spring, and [Ca²⁺] and [HCO₃ ⁻] decreased to less than the spring. During nighttime periods, pool water returned to or even increased to greater than the spring, pH and SIc decreased to less than the spring, and [Ca²⁺] and [HCO₃ ⁻] increased to greater than the spring. The decrease in [Ca²⁺] and [HCO₃ ⁻] to less than the spring during daytime periods implies daytime deposition of calcium carbonate, while the increase in [Ca²⁺] and [HCO₃ ⁻] to greater than the spring during nighttime periods implies nighttime dissolution of calcium carbonate. The direction of the observed changes depended essentially on the illumination, indicating that daytime photosynthetic and nighttime respiratory activities in the pool aquatic plant ecosystem, which were further evidenced by the increase and decrease in DO during daytime and nighttime periods respectively, were the main processes involved. The large variations of the components of the carbonate system imply considerable changes of the capacities of CO₂ and O₂ in water. The finding has implications for water sampling strategy in slow-flowing karst streams and other similar environments with stagnant water bodies such as estuaries, lakes, reservoirs, and wetlands, where aquatic plant ecosystem may flourish.     

羌塘盆地中侏罗统砂糖状白云岩流体包裹体碳—氧同位素分析及白云岩成因机制讨论

羌塘盆地隆鄂尼—昂达尔错古油藏带中侏罗统布曲组砂糖状白云岩储集层成因一直备受关注和争议。白云岩成因及其储层预测对于碳酸盐岩油气藏勘探具有重要意义,但是关于羌塘盆地布曲组白云岩的成因并没有一个相对统一的认识,争议核心聚焦在白云岩化流体性质。笔者等试图在包裹体测温和盐度分析的基础上,利用同位素分馏方程系统研究白云岩包裹体碳—氧同位素,探讨羌塘盆地侏罗系砂糖状白云岩白云岩化流体特征。研究表明白云岩白云石包裹体和灰岩方解石包裹体均一温度分布范围皆为50~220℃,但白云石的包裹体温度峰值分布区间明显要高于方解石的峰值温度,多数样品的温度集中在150℃到220℃区间;另外,与同层灰岩相比,白云岩具有明显的重碳同位素异常富集特征,该特征是高温流体交代石灰岩或者说是水岩反应的标志;此外,通过碳—氧同位素分馏方程计算出白云岩包裹体流体碳、氧同位素分别为-1. 30‰～1. 53‰和5. 81‰～12. 50‰,具有高盐度的卤水特征。综合包裹体温度、盐度,以及包裹体碳、氧同位素特征,本文认为羌塘盆地布曲组砂糖状白云岩是热液交代白云岩化产物。     

西昌复合盆地层序充填序列与沉积动力演化初探

本从层序地层学和沉积动力学角度，对西昌复合盆地进行了初步的研究。西昌复合盆地在不同地质演化阶段具有不同的大地构造属性，在区域上表现为不同区块具有不同的层序成因格架，显示典型的纵向叠加、横向复合的复式特点。盆地层序充填序列包括2个超层序、5个巨层序、8个一级层序、14个二级层序、76个三级层序以及若干个次一级层序，分别代表2个、5个、8个、14个、76个和若干个相应周期的海(湖)平面变化产物。盆地形成和发展受特提斯洋张力和不同块体边缘聚力的复合控制，其演化经历了褶皱基底固结、被动边缘海盆发展、陆内盆地改造三大阶段，具体包括造山裂谷(Z1)、初始被动边缘(Z2)、稳定被动边缘(∈-P2)、边缘热隆-拉裂(P3)、残余海盆(T1—T2)、周缘前陆(T3-J1)、陆内坳陷(J2-K1)、挤压改造(K2-E1)8个不同时期。     

两种融合降水实况分析产品在山东地区的适用性评估

以质量控制后的观测降水数据作为“真值”,采用多种指标评估检验国家气象信息中心研制的5 km逐小时降水实时三源融合实况分析产品(简记为“FRT_05”)和1 km逐小时降水实时多源融合实况分析产品(简记为“RT_01”)在山东地区2021年汛期以及台风“烟花”过程的适用性。结果表明:(1)两种降水产品在山东的适用性较好,但RT_01产品的精细化实况监测能力优于FRT_05。(2)检验指标的月变化明显,在降水量次多的9月降水产品的适用性最优。(3)两种降水产品在鲁中山区西部、威海东部和青岛沿海一带地形复杂的区域以及大部分海岛上的适用性相对较差。(4)由降水量级的检验评估来看,随降水量增加,平均绝对误差、均方根误差增大;中雨量级相对偏差最小,两种降水产品均高估了中雨及以下量级的实际降水强度,低估了大雨及以上量级的实际降水强度。(5)无论是降水量级还是降水落区,RT_01产品对台风“烟花”降水过程的监测和再现能力优于FRT_05,但整体来看两种产品均低估了“烟花”过程的降水强度。     

深层海相碳酸盐岩优质储层的形成、保存和破坏机制

四川盆地震旦系—志留系碳酸盐岩普遍埋藏深度超过3〖CS％0,0,0,0〗〖CS〗500 m,属深层碳酸盐岩储层范畴。宽广的潮坪相和陆棚相沉积环境从根本上决定了盆内下组合碳酸盐岩储层岩石类型主要为颗粒碳酸盐岩、晶粒结构白云岩及裂缝性灰岩。多期次的构造运动导致下组合岩溶储层发育,特别是志留纪末期的加里东运动导致从乐山—龙女寺古隆起核部由西向东依次发育震旦系、寒武系和奥陶系古岩溶带。现今下组合储层中广泛分布的沥青表明下组合曾有过广泛的油气成藏过程,形成古油藏或古气藏,亦表明下组合在油气充注时曾普遍发育优质储层。岩石学和地球化学研究表明,复杂多变、期次繁多的成岩演化和流体充注与下组合优质储层的形成、保存和破坏密切相关,总体上,对四川盆地深层海相碳酸盐岩储层而言： 1）原位沉积体系、白云岩化对震旦系和寒武系优质储层发育控制作用弱、仅对奥陶系和志留系具有较强的控制作用; 2）古隆起是优质储层发育的先决条件,表生岩溶与破裂作用为必备条件; 3）烃类流体充注和热裂解作用早期优质储层保存的主要机制,此外,适度的重结晶作用是形成优质储层的持久动力,埋藏过程中外源侵蚀性流体溶蚀作用的储层效应有限; 4）压实压溶作用、胶结充填作用是储层致密的最主要的因素。     

基于Theil不等系数的IOWA算子最优变形组合预测模型

针对传统组合预测模型中各单项预测模型赋权问题的不足,提出一种基于Theil不等系数的IOWA算子最优变形组合预测模型。利用IOWA算子,依据各单项预测模型预测值各时间点精度的不同,赋予不同的权系数,建立最优组合预测模型,并将其应用于变形数据分析与预测。实验结果表明,本文方法的预测结果比各单项模型与传统组合模型的结果更准确。     

格尔木地震台大震速报震级差异分析

选取格尔木地震台2000年7月到2013年5月的680个地震,与中国地震台网中心提供的《国家台网大震速报目录》进行面波震级的对比,得出格尔木地震台的台基校正值、标准误差;通过计算分析,总结出不同方位、震中距、震级大小的地震震级差异性之间的关系。