宜宾双河文庙震损模拟及抗震分析

2019年6月17日宜宾双河发生M6.0级地震,造成了距离震中仅5km的双河文庙建筑东北侧上檐翼角损坏和西侧局部斜撑脱落等局部损坏。双河文庙是典型的木结构文保历史建筑,开展相关震害和抗震分析具有重要意义。以近期在周边建立的场地-建筑强震反应融合监测台站获取的强震记录作为类比输入,进行结构地震反应仿真分析,结果表明：该木结构的整体刚度偏小,易发生扭转破坏,在7度中震和大震作用时,结构扭转效效极易引发挑檐处榫卯节点破坏,与实际震害情况吻合,该类结构宜适度补强纵向抗侧刚度,增强整体抗扭能力。     

A SIMPLE FORM OF PRESENTATION OF MAGNETOTELLURIC DATA USING THE BOSTICK TRANSFORM*

A new presentation for magnetotelluric data is proposed to be used together with the traditional representation. It is easily computed by applying the Bostick transform to all field data points. The result is an approximate depth-resistivity diagram which contains an indication of the data quality as well as the homogeneity of the subsurface. This resistivity section should be used in the interpretation of surveys in which accuracy is either not of prime concern or cannot be achieved. Since this mode of presentation is easily understood it can be used to familiarize earth scientists with the use of the MT method in exploration.     

Calculation of mean areal depth of precipitation

A new procedure for the calculation of the mean areal depth of precipitation is presented and compared with the commonly used methods. The procedure is conceptually simple and easily programmed for computer application.     

新型单自由度基础隔震体系简化计算方法研究

本文建立了一种新型的单自由度体系基础隔震结构实用设计方法，该方法考虑了上部结构的变形、简便，合理，可靠，与传统抗震设计方法概念比较接近，便于在工程应用中推广。     

A New Method for Collecting Core Samples Without a Drilling Rig

A new piston sampler allows the collection of high-quality core samples from sand, silt or clay, up to depths of 18 meters. The sampler is operated by a one- or two-person crew without a drilling rig. The sampler and ancillary equipment fit easily into a half-ton truck, making this a highly portable sampling system. Other advantages include minimal mechanical disturbance and precisely known sample depth. Casing is not required to maintain an open corehole below the water table and drilling fluid is not used in the corehole, so the solids and pore water of the sample should not be contaminated by foreign fluids. High-quality samples for physical, geochemical, and microbiological characterization of the subsurface are easily obtained with this new device.     

Screening of one-well hydraulic barrier design alternatives

This study develops a robust method for screening one-well hydraulic barrier design alternatives that can be easily computed without a numerical simulation model. The paper outlines the general method and shows its implementation with hydraulic barriers using a single pumping well. For such barriers, the method is easily computable with spreadsheets and/or charts depicted within the paper and posted online. The method applies the potential flow theory, which leads to using a curvilinear coordinate system for all types of calculations. For contaminant transport calculations, the method applies the boundary layer theory. For calculations of aquifer remediation, the method refers to bulk characteristics of the domain. As an example, the method has been applied to calculate the possible containment of a wide part of the coastal plain aquifer in Israel, which is contaminated by entrapped kerosene (a light nonaqueous phase liquid).     

一种自动检测水准测量资料中点位突跳的新算法

本文针对水准测量资料中经常出现的某些孤立点的位移明显偏离其周围点所决定的整体位移趋势的现象,设计了一种检测突跳的算法。此算法简单,易于实施。     

THE TRANSIENT ELECTROMAGNETIC RESPONSE OF A CONDUCTING SPHERE IN AN IMPERFECTLY CONDUCTING HALF-SPACE*

The presence of a conducting environment about a spherical ore body must be considered when calculating the transient electromagnetic response of the ore body due to a step current flowing in a large circular loop at the earth's surface. Failure to do this can easily lead to errors in excess of 10% in numerical calculations. Moreover, there is only a limited time interval in which the response of the spherical conductor is easily seen. In a poorly conducting ground the resonance response of the sphere is the first to be excited. Later, however, the non-resonance or wave-type response is excited. These waves destructively interfere and finally the response of the sphere decays with time as t^?7/2. For a range of times and depths the best loop for detecting the sphere has about the same radius as the sphere.     

Results of twenty years of atmospheric electricity research at Ibadan

The results of atmospheric electric measurements over a twenty year period (1961–1980) are reviewed for Ibadan situated in the tropical rain forest of Nigeria. The aim is to present the data in an easily accessible form.     

Dynamic similarity in erosional processes

Summary A study is made of the dynamic similarity conditions obtaining in a variety of erosional processes. The pertinent equations for each type of process are written in dimensionless form; the similarity conditions can then easily be deduced. The processes treated are: raindrop action, slope evolution and river erosion.     

瑞利波法在工程抗震中的应用

工程抗震工作需要掌握各层土的剪切波速度资料,以便进行地震危险性分析和场地震害小区规划等项工作。采用瑞利波法进行岩土力学特性指标测定,通过实际性能应用表明该方法是简便易行的。     

Comments on a method allowing permanent preparations of phytoplankton for light microscopy and the accurate selection and positioning of its cells for transmission electron microscopy

A new flat embedding method is commented. This method allows embedding of the same phytoplankton sample for light and transmission electron microscopy. Rare or interesting field specimens can then be easily selected and sectioned without the need of cultures. A great range of biological material can be handled with this method.     

星载微波SSM/I对南中国海海面遥感的辐射特征及其风场反演

研究了星载微波DMSPSSM／I对南中国海海面遥感数据的定量辐射特征．与现有的经验性统计反演不同,本文用37GHz垂直和水平极化两个通道的辐射亮度温度,提出了物理意义明确,又易于计算和参数标定的海面风速反演公式．海面风速及演结果与现有的海面浮标风速观测记录作了很好的比较．这一方法应用于南中国海海面风速的反演,得到了南海海面风速在空间和时间尺度上的分布和变化．     

偏振法在小地震定位方法中的应用

偏振是地震波在三分量记录上主要的特征,不同的地震波有着不同的偏振化性质和偏振参数。本文采用偏振法对小地震进行精确定位,使读取的震相容易识别,从而定位的精度提高。与其它定位方法比较,小地震的定位更精确。     

付载波频偏的测量及其在遥测台网中的应用

付载波频偏测量对于保证调频系统传输质量具有重要的意义。本文介绍了我们设计制作的付载波频编测量仪。该仪器便于携带、使用方便、精度送±１０＾－３＊ｆ０＋１赫该精度满足模拟传输台网的需要。     

Multi-trace basis-pursuit seismic inversion for resolution enhancement

Seismic inversion is an important tool that transfers interface information of seismic data to formation information, which renders the seismic data easily understood by geologists or petroleum engineers. In this study, a novel multi-trace basis-pursuit inversion method based on the Bayesian theory is proposed to enhance the vertical resolution and overcome the lateral instability of inversion results between different traces occasionally seen in the traditional trace-by-trace basis-pursuit inversion method. The Markov process is initially introduced to describe the relationship between adjacent seismic traces and their correlation, which we then close couple in the equation of our new inversion method. A recursive function is further derived to simplify the inversion process by considering the particularity of the coefficient matrix in the multi-trace inversion equation. A series of numerical-analysis and field data examples demonstrates that both the traditional and the new methods for P-wave impedance inversion are helpful in enhancing the resolution of thin beds that are usually difficult to discern from original seismic profiles, thus highlighting the importance of acoustic-impedance inversion for thin bed interpretation. Furthermore, in addition to yielding thin bed inversion results with enhanced lateral continuity and high vertical resolution, our proposed method is robust to noise and cannot be easily contaminated by it, which we verify using both synthetic and field data.     

浅谈地震谣言的产生及应对——以2018年8月13日地震谣言事件为例

云南是一个地震频发的省份,地震发生,公众易处于恐慌之中,这种情绪便是引发地震谣言并使谣言肆意蔓延的重要原因。文章以2018年8月13日地震谣言事件为案例,着重分析在此次事件的舆论应对中,地震谣言产生的原因,并对应对的实践经验进行梳理总结,为后期开展科普宣传工作提供参考。     

重要性不同的现有结构抗震加固设计地震动参数研究

提出了重要性不同的现有结构抗震加固设计基准期取值原则,给出了现有结构抗震加固设防水准的定义。基于地震危险性特征分区,利用地震动参数的危险性曲线公式对重要性不同的现有结构抗震加固设计地震动参数进行了分析。同时,为了便于工程设计人员使用,给出了现有结构设计地震动参数取值的简化方法。最后,通过算例解释了理论方法和简化计算方法中抗震加固设计地震动参数的取值方法和步骤。     

角部重叠框架结构的抗震分析及超限界定

通过某模型工程对抗震不利的平面之一--角部重叠框架结构高层建筑进行了分析.结果显示角部重叠面积越小,结构抗扭刚度越小,结构扭转效应会越来越大;地震作用下重叠处楼盖的应力集中越严重,楼板平面内容易产生的较大的变形和裂缝.但认为角部重叠平面做为组合平面的一种,宜在所列三项及三项以上不规则的高层建筑工程做为其中一项进行超限控制,单独做为一项进行超限控制有可能偏严.     

Fate of Benzalkonium Chloride in a Sewage Sludge Low Temperature Conversion Process Investigated by LC‐LC/ESI‐MS/MS

Thermocatalytic low temperature conversion (LTC) is a new method for the disposal of sewage sludge. Using this method, sludge is converted into a residual solid (coal) along with reaction water, oil, and non‐condensable gases. The oil can be used as an energy source and the coal as a substitute for charcoal. To this end, it is important to determine whether there are any easily available contaminants present in the coal generated by the process. Contaminants that can be strongly sorbed by sewage sludge solids are, e. g., pharmaceuticals and disinfectants. As an example the fate of the persistent and strong adsorbing disinfectant benzalkonium chloride (BAC) has been investigated within the LTC process. The sewage sludge was spiked with BAC and then subjected to the LTC process. The resulting coal was extracted and analyzed using LC‐LC/ESI‐MS/MS (ion trap). BAC could not be detected in the LTC coal, although it could be extracted from the spiked sludge before the LTC treatment. It can thus be concluded that the investigated compound is not easily available in the coal, and hence that its use does not present a risk.