对Nakai拟合法的改进及实际应用

本文对Nakai拟合法作了改进并应用于计算井水固体潮和气压系数。利用该方法还可以计算井水位对固体潮和气压响应的滞后时间。以鲁06井为例,用本文的方法计算出其井水位的固体潮和气压系数分别为16.9mm/10~(-3)和5.58mm/hPa,滞后时间分别为18.8和22.4分钟。校正后的中误差由8.5mm下降到6.1mm。     

JOPENS系统单纯型定位法定位中国台湾地震精度分析

利用JOPENS系统中交互分析软件MSDP提供的单纯型定位法,对中国台湾地震进行分析定位,将结果与中国台湾公布的参数进行对比;分析此定位方法得出的地震参数与中国台湾结果的吻合性,判断可否使用此定位方法,对中国台湾地震进行定位。     

Research on Estimating Water Storage of Small Lake Based on Unmanned Aerial Vehicle 3D Model

Water Resources - Lake Water storage can be estimated based on Lake Boundary and lakebed terrain. The boundary of a lake can be extracted from the remote sensing satellite image or the Unmanned...     

Selection of the wavenumbers k using an optimization method for the inverse Fourier transform in 2.5D electrical modelling

An optimization method is used to select the wavenumbers k for the inverse Fourier transform in 2.5D electrical modelling. The model tests show that with the wavenumbers k selected in this way the inverse Fourier transform performs with satisfactory accuracy.     

A Preliminary Interpretation of Near-field Observation Data of the Zhangbei Earthquake

In this paper, a preliminary data processing was made for tbe aftershock records or theZhangbei M6.2 earthquake on Jan. 10, 1998. The hypocenters of 205 earthquakes with M_L≥0.5 were located. The result shows that most aftershockS were concentrated in a more than10 km long and 5～8 km wide NE-trending beIt. The source mechanism solutions of largeraftersbocks were also calculated, from which it can be inferred that the faulted zone of themain shock is an NE-trending fault. Furthermore, the spectral analysis of P waves was made.The corner frequency is about 10 Hz.     

多种岩石的Qp,Qs,Qc

本采用脉冲传播谱振幅比法、能量法、尾波法分别测多种岩样的Ｐ波Ｑ值、Ｓ波Ｑ值及尾波Ｑ值。结果表明，能量法所得Ｑｐ、Ｑｓ较小。谱振幅比法所得Ｑｐ一般居中，Ｑｓ较大。尾波Ｑｃ有的偏大，有的偏小。     

地脉动水平/竖向谱比表征地震动场地效应的有效性及其修正

近年来,地脉动水平/竖向谱比法广泛应用于获取场地卓越频率工作中,但在指示地震动放大系数方面是偏小的。利用KiK-net台网403个台站共21万余组数据,通过对比分析地脉动水平/竖向谱比MHVR和地震动水平/竖向谱比EHVR,发现二者的谱形和峰值频率基本一致,但幅值存在差异。根据MHVR谱形将场地分为6类,建立将MHVR修正为EHVR的经验方法。当MHVR有可解释的峰值时,实测EHVR和修正后MHVR预测值一致性提高。地震动峰值加速度在40 cm/s2以下时,EHVR受场地非线性的影响较小,利用MHVR及其修正方法可有效估计EHVR。     

Heavy metals in particulate and colloidal matter from atmospheric deposition of urban Guangzhou,South China

Suspended particulate matter (SPM) and colloidal matter (COM) in annual dry and wet deposition samples in urban Guangzhou were for the first time collected, and their trace metals were investigated by using inductively coupled plasma mass spectrometry (ICP-MS). The deposition flux of SPM and of metal elements varied largely among the investigated seasons, and reached the maximum in spring. The correlation analysis indicated that significant correlations existed among some of the metal elements in the deposition samples. The enrichment factors (EF) of metals in COM in the deposition ranging from 79.66 to 130,000 were much higher than those of SPM ranging from 1.65 to 286.48, indicating the important role of COM. The factor analysis showed that emissions from street dust, non-ferrous metal production, and heavy fuel oil were major sources of the trace metals. Positive matrix factorization (PMF) model was used to quantitatively estimate anthropogenic source.     

洪湖日本沼虾的种群繁殖生物学

1994年5月至1995年6月对洪湖日本沼虾的种群繁殖生物学进行了研究．洪湖日本沼虾的繁殖期为4月中旬至10月上旬,5月中旬至8月中旬为日本沼虾的繁殖高峰期,其中6月、8月雌虾抱卵率均在70％以上;日本沼虾群体中雄性总是少于雌性,月性比（♀／♂）变化于1．104－5．780之间,3—6月性比逐渐增高,7─10月性比则逐渐降低;在整个繁殖期．4─7月的抱卵虾均为前一年出生的大、中规格的个体,之后当年出生的个体在繁殖群体中逐渐占据优势;春季抱卵虾的绝对繁殖力和相对繁殖力都大于秋季抱卵虾,分别计算了绝对繁殖力、相对繁殖力与体长、体重的函数关系．本文还对日本沼虾群体性比的周年变化及其产卵次数进行了讨论．     

填方边坡稳定性影响因素敏感性分析

以重庆某核电场地填方边坡为例,采用均匀试验设计法安排试验,运用回归分析法对比分析各个因素对边坡稳定性影响的差异,得到各影响因素对填方边坡稳定的敏感性.影响边坡稳定性的主要因素为填料内摩擦角￠、边坡坡度α和地下水水位Hw.根据各影响因素对边坡稳定性的敏感性大小,填方边坡的设计和施工中可采取更具针对性的工程措施.