Fracture Characteristics and Heat Accumulation of Jixianian Carbonate Reservoirs in the Rongcheng Geothermal Field, Xiong’an New Area

Geothermal energy plays an important role in urban construction of the Xiong’an New Area. Geothermal reservoir fracture distribution of the Mesoproterozoic Jixianian Wumishan Formation (Fm.) carbonate reservoir in the Rongcheng geothermal field are evaluated based on FMI log from Wells D19 and D21. The results show carbonate reservoir fracture density of Well D19 is 15.2/100 m, greater than that of Well D21 with a value of 9.2/100 m. Reservoir porosity and permeability of Well D19 are better than that of Well D21, and the water saturation is bimodally distributed. The movable fluid volume ratio (BVM) of Well D19 is 2% to 8% with some zones exceeding 20%, while the value of Well D21 is less than 4%. Therefore, reservoir fractures in Well D19 are more conducive to fluid flow. Reservoir fractures have a similar occurrence to normal faults, indicating that the tensile stress field controlled the formation of such fractures. Developed reservoir fractures provide a good channel for groundwater convection. The circulation of regional groundwater and the heat exchange between water and rock and the multiple heat accumulation patterns form a stable and high potential heat reservoir in the Rongcheng geothermal field.     

淮南深部地球物理实验场重力噪声水平初步分析

利用淮南深部地球物理实验场地下848 m巷道内的Burris弹簧重力仪和地表LCR-ET20弹簧重力仪同期连续重力潮汐观测资料,对实验场地表和地下重力噪声水平进行了初步分析.分析结果表明在频率小于1.70 mHz(对应周期约为9.8 min)时,地下重力噪声水平都要比地表低;特别是在重力仪敏感的信号频段(周期大于3h的信号频段),地下848 m巷道内的重力噪声水平要比地表低约2个数量级,充分验证了实验场地下观测环境具有低重力噪声水平的超静特点.实验结果证明淮南深部地球物理实验场地下848 m巷道可为深地多物理场观测提供超静观测环境,为检测微弱地球物理场信号提供绝佳观测条件.     

输电线路激光扫描数据质量检查与快速分析

针对输电线路激光扫描数据质量检查工作量大、效率低、输电通道安全距离快速分析时效慢等问题,本文提出一套激光数据质量检查与快速分析方法.根据输电线路激光点云数据特点,开发工具对数据进行自动化检查;利用自动化检查的数据,对点云数据进行快速自动/人工交互分类,基于快速分类数据进行安全距离快速分析,为运维单位提供隐患报告.实验结果表明:该方法能有效提高数据质检和安全距离快速分析效率.     

利用量化质量图和优先队列的快速相位解缠算法

提出了一种量化质量引导的快速相位解缠算法。在质量图中采用整数表示相应相位点的质量,引入由静态数组和双链表组成的优先队列,建立相位质量与静态数组下标的对应关系,利用双链表保存具有相同质量值的相位点,保证了所有相位点按照质量值的非递减顺序排列,极大地提高了传统质量引导相位解缠算法的效率。对InSAR和仿真InSAS数据的实验证明了该算法的高效性。     

Coherent structures and flux contribution over an inhomogeneously irrigated cotton field

The turbulence data measured at two levels (i.e., 8.7 and 2.7?m) in the Energy Balance Experiment (EBEX), which was conducted in San Joaquin Valley in California during the period from July 20 to August 24, 2000, are used to study the characteristics of coherent structures over an irrigated cotton field. Patch-to-patch irrigation in the field generated the dry-to-wet horizontal advection and the oasis effects, leading to the development of a stably internal boundary layer (SIBL) in the late mornings or the early afternoons. The SIBL persisted in the rest of the afternoons. Under this circumstance, a near-neutral atmospheric surface layer (ASL) developed during the period with a stratification transition from the unstable to stable conditions during the daytime. Therefore, EBEX provides us with unique datasets to investigate the features of coherent structures that were generated over the patches upstream and passed by our site in the unstable ASL, the near-neutral ASL, and the SIBL. We use an objective detection technique and the conditional average method that is developed based on the wavelet analysis. Our data reveal some consistencies and inconsistencies in the characteristics of coherent structures as compared with previous studies. Ramp-like structures and sweep?Cejection cycles under the daytime SIBL have similar patterns to those under the nocturnal stable ASL. However, some features (i.e., intermittence) are different from those under the nocturnal stable ASL. Under the three stratifications, thermal and mechanical factors in the ASL perform differently in affecting the ramp intensity for different quantities (i.e., velocity components, temperature, and specific humidity), leading to coherent structures that modulate turbulence flow and alter turbulent transfer differently. It is also found that coherent structures contribute about 10?C20% to the total fluxes in our case with different flux contributions under three stratifications and with higher transporting efficiency in sensible heat flux than latent heat and momentum fluxes.     

基于声纳图像纹理特征的海底底质分类方法研究

一般不同底质的海底声纳图的纹理特征不同。重点分析了不同底质声纳图像纹理特征的差异,为底质分类的实现提供了基础。并提取了海底声纳图像的灰度共生矩阵,将灰度共生矩阵的统计特征作为特征向量。最后应用自组织迭代(ISODATA)分类算法依据对特征向量进行分类,从而实现了海底底质的划分。     

水文重力效应改正中一维地下水模拟算法的对比

基于一维地下水渗透方程详细推导其有限差分解算过程，引入不同于显式差分的隐式差分和中心差分格式，对比分析不同差分格式对地下水模拟结果及其相应地下水重力效应的影响，并对其中的层间参数取值和非线性方程的线性化问题进行探讨。结果表明，在日本Isawa扇形地区超导台站，不同层间参数加权公式能够引起最大约0.15 μGal的重力效应差异，影响在1.9%以内；不同差分格式和线性化方法组合形式能够引起最大约0.12 μGal的重力效应差异，影响在1.5%以内。     

数字地震台电源远程监控系统

以STC89C52单片机为核心,开发基于"十五"网络的地震台站电源远程监控系统,实时的监控台站仪器设备的状态并收取状态参数,实现设备复位操作及故障报警,可以提高地震台网中心仪器运行效率。     

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