浙江桐庐晚奥陶世内潮汐沉积

本文论述了在中国首次发现的内潮汐沉积的特征及其形成环境。该内潮汐沉积发现于浙江省桐庐县桐君山地区上奥陶统上部,具有典型的对偶层双向递交层序。据其岩类组合和层序特征,可将其定为韵律性砂泥岩薄互层相。其中发育有特征的脉状、波状和透镜状层理。其沉积特征表明形成于开阔的深水斜坡环境,这种对偶层双向递交层序可能为内潮汐的大潮和小潮周期性变化的结果。     

龙门山陆内俯冲带形成机制探讨

本文分析了龙门山陆内俯冲带两侧岩石圈的强度结构特征及在侧向力作用下所发生的变形过程。盆地岩石圈中高强度层厚而紧凑,显示了较好的整体高强度性;造山带岩石圈上地壳具高强度,其下为低强度层。在侧向挤压力的作用下,变形主要发生于造山带一侧,最可能的变形方式是其脆性上地壳出现倾向后陆的逆冲断层,盆地岩石圈沿此断层俯冲,挤压其下部的低强度层,使之发生韧性增厚变形。     

自动生成高质量等值线图的算法探讨

文章从煤田地质勘探的特点及需求出发,指出了以往生成等值线图的算法存在的缺点,介绍了曲面样条函数及张力样条函数的优点,在理论上对其数学原理及算法进行了研究。作者认为网络化模型的自动生成和曲线光滑算法是自动生成高质量等值线的最重要算法     

我国及邻区板内地震与板缘地震的关系

我国及邻区可划分为两个地震域。其内带及外带的地震活动有相互消长的关系。相邻板块施加的外力,使板内水平压应力增强,是板内地震的主要原因。热羽活动、地幔上隆、固体潮、地球旋转轴摆动、地球自转速率变化可能是次要原因     

热层大气潮汐微分算子与微分积分方程

本文进一步讨论了热层大气潮汐微分算子的问题,求得了有平均风场及风切变时的微分算子;从有限汉克尔（Hankel）变换的反演,求得了热层大气结构的微分积分方程,并讨论了这一方程的求解问题。     

长江中下游地区内生铁铜矿床与膏盐的关系

A middle-Trlassic sequence of strata composed .of gypsumstlt beds has been reeognized in the middle-lower Yangtze Valley. The mineralization in the gypsum-salt beds is closely related to Yenshanian magmatism, During the Yenshanian, magmatic intrusion activities were very active across evaporite beds, occupying great space in gypsum-salt beds. The magmatie rocks and the alterated country rocks are characterized by alkali-eurichment and halogen-enrichment. Copper and iron ores mainly occur in the evaporite beds or overlying levels. The genesis of endogenic copper and iron ores is commonly considered to be the consequence of interaction of magma with the gypsumsalt beds, i.e. there exists a close genetic connection between evaporites, magmatism and copper-iron ores. These observed features are of great significance both in practice and theory.     

FPGA在时间测量中的应用

利用现场可编程门阵列(FPGA)的内部资源，在FPGA中实现了高精度时间间隔测量系统的设计。     

微带发夹型滤波器的设计

微带发夹型滤波器具有结构紧凑,尺寸小、重量轻和成本低等优点.根据微波电路设计的基本理论,利用微波电路ADS软件,设计了一个微带发夹型滤波器,其中心频率为2.3GHz时,通带带宽为200MHz,通带内插损小于1.7dB.仿真结果表明所设计的滤波器不仅尺寸小,而且性能优越,具有很高的实用价值.     

在Zebiak-Cane模式中观测MJO强迫对ENSO可预报性的影响, 第1部分:对最大预报误差的影响

With the observational wind data and the Zebiak-Cane model, the impact of Madden-Julian Oscillation (MJO) as external forcing on El Ni(n)o–Southern Oscillation (ENSO) predictability is studied. The obs...     

吕宋海峡M2内潮的三维数值模拟

A three-dimensional isopycnic-coordinate internal tidal model is employed to investigate the generation,propagation, vertical structure and energy conversion of M2 internal tides in the Luzon Strait(LS) with mooring observations. Simulated results, especially the tidal current amplitudes, agree well with observations,demonstrating the reasonability and accuracy of the model. Results indicate that M2 internal tides mainly propagate into three directions horizontally, i.e., eastward towards the western Pacific Ocean, westward towards the Dongsha Island and southwestward towards the South China Sea Basin. In the horizontal direction, tidal current amplitudes decrease as distance increases away from the LS; in the vertical direction, they show an obvious decreasing tendency with depth. Between the double ridges of the LS, a clockwise gyre of M2 baroclinic energy flux appears, which is caused by reflections of M2 internal tides at supercritical topographies, and resonance of M2 internal tides happens along 19.5° and 21.5°N due to the heights and separation distance of the double ridges. The total energy conversion in the LS is about 14.20 GW.