滦县地区尾波Q值及其与频率关系的研究

利用国家地震局地球物理勘探大队在滦县地震区取得的高精度的数字化地震记录资料,由尾波分析法计算了对应于7个不同频率(f=1.5,3.0,6.0,10.0,15.0,20.0,25.0Hz)的介质Qc值.发现在该频率范围内Qc随频率的变化近似服从幂函数关系Qc=afb.对流逝时间较短(40s左右)的尾波资料,求得a=46,b=0.85.对流逝时间较长(60s左右)的资料,a=72,b=0.90.b值较大,表明Qc值对于频率的强依赖关系,a值(1Hz的Qc值)较小.这些结果表明该地区为一较强的构造活动区.     

山西省原平市孙家庄-南坡村铁矿地质特征及找矿方法

通过对区域地质特征的分析,了解了该区磁铁矿赋存于五台群的石咀亚群金岗库组中,含矿岩石为磁铁石英岩,围岩主要为石榴黑云变粒岩、次为斜长角闪岩、黑云二长片麻岩、黑云角闪片麻岩、黑云微斜石英片岩.结合地表磁法扫面的结果,寻找隐伏的磁性体,用钻探手段进行验证,以达到找矿的目的.     

土地征用行政争议解决中法律问题的思考

阐述土地征用中征用人与权利人之间的争议是行政争议，两者之间是行政法律关系。有些地方用解决城市房屋拆迁争议的程序和方式解决土地征用中地上附属物补偿、安置的争议，本文认为这是混淆了行政法律关系与民事关系的界限，应予纠正，并提出在立法中进一步规范的建议。     

EMD在北斗桥梁变形监测数据中的应用研究

针对我国北斗系统变形监测数据中存在的噪声问题,本文利用自适应信号分析方法经验模态分解(EMD)对某北斗实测变形监测数据进行降噪处理。首先对E、N、U 3个方向的分量进行分解获取本征模态函数及趋势项,其次根据相关系数分离出噪声的本征模态函数,最后根据重构方法得到干净的位移序列。结果表明:EMD方法在北斗变形监测数据中的去噪是可行的,能有效分离信号与噪声,进一步提高了北斗观测的精度。     

Asteroseismology of DAV white dwarf stars and G29-38

Asteroseismology is a powerful tool used for detecting the inner structure of stars, which is also widely used to study white dwarfs. We discuss the asteroseismology of DAV stars. The period-to-period fitting method is discussed in detail, including its reliability in detecting the inner structure of DAV stars. If we assume that all observed modes of some DAV stars are the l = I cases, the errors associated with model fitting will be always large. If we assume that the observed modes are com- posed of I = 1 and 2 modes, the errors associated with model fitting in this case will be small. However, there will be modes identified as l = 2 that do not have ob- served quintuplets. G29-38 has been observed spectroscopically and photometrically for many years. Thompson et al. made 1 modes identifications in the star through the limb darkening effect. With 11 known I modes, we also study the asteroseismology of G29-38, which reduces the blind l fittings and is a fair choice. Unfortunately, our two best-fitting models are not in line with the previous atmospheric results. Based on factors like only a few observed modes, stability and identification of eigenmodes, identification of spherical degrees, construction of physical and realistic models and so on, detecting the inner structure of DAV stars by asteroseismology needs further development.     

长期视宁度监测DIMM系统设计方案

视宁度参数r0是现代天文选址中需要测量的一个重要物理量,而差分像视宁度监测仪(Differential Image Motion Monitor,DIMM)是目前普遍采用的测量视宁度参数r0的天文仪器。详细介绍了可进行长期视宁度监测的DIMM系统的设计方案,重点讨论了目标星指向、自动导星、自动测量和数据保存等部分。长期视宁度监测DIMM系统的部署,有助于分析已选站址或候选站址的本征视宁度,评价一个站址的成像质量。     

黔西南州2010年日照特征太阳能分布及利用分析

黔西南州2010年发生了特大干旱,汛期又多处出现大暴雨,导致年日照时数受影响。全州8县(市)年度日照统计比较,安龙特多,兴仁特少,年度降雨量与日照关系密切相关。用30 a日照资料统计分析,年度气候资源有"两峰两谷"季节性特征;借鉴"十一.五"期间太阳能普查成果,用安龙日照百分率推算太阳能资源,进一步探索开发利用前景,提出一般年份和异常年景对策建议。     

脊髓纵裂征一例

本文报道了一例脊髓纵裂征，并着重讨论了该病Ｘ线ＣＴ表现，其中脊髓中央的骨嵴是诊断该病的关键，通过Ｘ线ＣＴ检查对比认为ＣＴ是最理想的诊断依据