Property and performance amelioration of pelagic clay from the East Pacific

To make use of the pelagic clay as polymer filling, the properties of clay sediments from the ocean investigation zone of China in the East Pacific were studied by the SSA, XRF, ICP/MAS, FTIR, XRD, SEM, DTA/TG and granularity distributing etc. , and experiments were settled to improve the whiteness and activation of the clay based on these data. Compared with land clay, pelagic clay holds many particular features, such as fine particles and incompact accumulation, worse crystallization and more defects, high activity, complex mineral and chemical components, and low whiteness etc. Processing the purified pelagic clay with acids and zinc, then baked it at different temperatures, the whiteness of clay can be increased from 23.8% to 73.1%, and the optimized conditions is： consistency of vitriol 25%, ratio of clay to water 4： 1, reaction time 4h, reaction temperature 90℃, dosage of zinc 2.0 g/L, and baking temperature 700℃. And the SSA of whited clay is increased too. Using the dry milling method to modify the pelagic clay with organic reagents, the optimized technique is KH550, concentration 1.5%, reaction time 20 min. XRD, FTIR and SEM testing indicate that the mechanism of organic activation was mainly surface absorbing and chemical combination secondly.     

关于PN空间线性算子概率范数的讨论

利用单位圆N（0,1）讨论PN空间中线性算子的概率范数的几个性质。     

怀来地震台定点形变观测转折异常的调查与分析

2020年3月12日河北省怀来地震台伸缩仪、水管仪、垂直摆和水平摆同步出现快速转折破年变的变化,针对这些异常,从观测和供电系统、洞室环境、气象因素等方面开展现场实地调查与异常核实工作.通过对观测环境的勘查,发现3月10日在观测山洞西侧约80 m处,原有的2排平房因拆迁被拆除.应用点载荷模型对拆迁房屋引起的形变理论值进行...     

钻孔差应变仪观测的苏门答腊大地震激发的地球环型自由振荡

我们率先用钻孔应变仪观测资料研究了地球自由振荡. 泰安地震台有差应变和体应变两种钻孔应变观测仪器,都观测到2004年12月26日苏门答腊大地震激发的地球自由振荡. 体应变仪观测到地球的球型振荡,而差应变仪观测到地球的环型振荡. 两种观测还记录到环型振荡与球型振荡相互的耦合作用. 观测也记录到明显的一些振型的谱线分裂现象. 用直接观测到的高质量的环型振荡资料求解了0T8～0T19等主要振型的Q值. 根据两个方向的剪应变观测数据,求解了环型振荡的最大剪应变方向,发现这个方向是相当稳定的. 这种研究表明,高精度钻孔应变观测仪是一种理想的地壳形变观测仪器,可以为地球自由振荡研究提供更丰富的信息.     

城市空气质量GIS数据模型及分析系统的集成与应用

城市空气质量模拟是目前环境与健康研究的一个重要领域。本文基于GIS技术,采用准稳态高斯扩散模型建立了城市空气质量模拟系统,着重研究了三维空间城市空气质量模型系统的集成方法,并以福州市为例,采用该模型系统对城市建城区的NO₂与SO₂年平均浓度场分布进行了模拟。     

浅议湖北旅游地图的现状与发展

简述湖北旅游地图现状、品种、编制特点。分析目前湖北旅游地图存在的问题。提出改进和发展湖北旅游地图的对策:地图编制单位与旅游部门要加强沟通联系,测绘主管部门要加大对地图市场的监管力度,科学地运用当今先进测绘技术编制旅游地图,提高地图编印质量,丰富旅游地图品种。     

Numerical Simulation on Oscillation-Sliding-Uplift Rock Coupled Motion of Caisson Breakwater Under Wave Excitation

Corresponding to the sliding and the overturning failure, the elementary motion modes of caisson breakwater include the horizontal-rotational oscillation coupled motion, the horizontal sliding-rotational oscillation coupled motion, the horizontal vibrating-uplift rocking coupled motion, and the horizontal sliding-uplift rocking coupled motion. The motion mode of a caisson will transform from one to another depending on the wave forces and the motion behaviors of the caisson. The numerical models of four motion modes of caisson are developed, and the numerical simulation procedure for joint motion process of various modes of caisson breakwater under wave excitation is presented and tested by a physical model experiment . It is concluded that the simulation procedure is reliable and can be applied to the dynamic stability analysis of caisson breakwaters.     

Numerical Simulation on Oscillation-Sliding-Uplift Rock Coupled Motion of Caisson Breakwater Under Wave Excitation

Corresponding to the sliding and the overturning failure, the elementary motion modes of caisson breakwater include the horizontal-rotational oscillation coupled motion, the horizontal sliding-rotational oscillation coupled motion, the horizontal vibrating-uplift rocking coupled motion, and the horizontal sliding- uplift rocking coupled motion. The motion mode of a caisson will transform from one to another depending on the wave forces and the motion behaviors of the caisson. The numerical models of four motion modes of caisson are developed, and the numerical simulation procedure for joint motion process of various modes of caisson breakwater under wave excitation is presented and tested by a physical model experiment. It is concluded that the simulation procedure is reliable and can be applied to the dynamic stability analysis of caisson breakwaters.     

用RAPD方法对不同色三疣梭子蟹的分析

为寻找三疣梭子蟹体色相关的分子标记,本文用RAPD方法对紫色和茶绿色两种三疣梭子蟹基因组DNA进行体色相关遗传标记的筛选及其遗传多样性分析。从80个随机引物中共筛选了30个重复性好多态性高的引物,RAPD分析结果表明：紫色梭子蟹个体组成的群体多态性位点比例为61.29%,Nei氏基因多样性指数为0.3756,Shannon信息指数为0.5545;茶绿色梭子蟹个体组成的群体多态性位点比例为62.44%,Nei氏基因多样性指数为0.3451,Shannon信息指数为0.5099。紫色和茶绿色三疣梭子蟹之间Nei氏无偏差遗传相似性指数为0.9682,遗传距离为0.0323。这些结果表明,紫色和茶绿色三疣梭子蟹群体的遗传多样性程度接近,具有相似的遗传多样性基础。另外,有2个随机引物（SBSA09和SBSG16）扩增得到群体特异性片段各1条。     

铂族元素在地壳、岩石和沉积物中的分布

随着20世纪90年代铂族元素分析测试技术的突破性进展以及大量可靠的岩石和沉积物铂族元素含量分析数据的积累,引用20世纪80年代前发表的有关铂族元素的地壳丰度和岩石、沉积物中的平均含量作为衡量标准已不适宜。根据近15年来获得的大量的有关铂族元素含量的可靠数据,综合给出了铂族元素在地壳、岩石、土壤和沉积物中的丰度。这种对地壳、岩石和沉积物中铂族元素丰度值的新认识,对理论地球化学、勘查地球化学甚至铂族元素矿产勘查工作都具有重要的意义。