跨孔地震测井初步试验与分析

当前,在许多大型土建工程地质勘察中,越来越多地采用孔内弹性波原位测试方法,特别是横波(S 波)测试已成为重大工程地质勘探中不可缺少的主要手段之一。传统的动弹性参数测试是根据岩土样品计算的。可是这种经扰动后的样品并不代表岩土原有湿度、结构等原状条件,以致使测试及计算的准确性大大降低。孔内弹性波测试是在原位地层中进行的。弹性波的激发、传播和接收,受边界条件影响因素很小,因而可真实地反映土体骨架的动力学特性。     

福建省煤田地质工作回顾

从福建省50多年来承担煤田勘查的队伍演化、煤田地质勘查发展历程、五大煤炭基地勘查简介、煤田地质勘查及研究主要成果等方面进行回顾,总结了福建煤田地质勘查的基本经验和体会,对今后煤田地质工作提出了相关的建议。     

广西一次飞机增雨过程个例分析

利用EC预报场、WRF模式预报和卫星雷达等资料,分析2017年11月24日广西的一次飞机增雨作业过程。结果发现,南支槽和冷空气是此次降水的主要影响系统。此次过程广西西部、北部水汽条件较好,桂西北液态水含量局部达1.0mm;百色区域从700hPa到300hPa附近整层云系都存在较强的垂直上升运动,分析该地区云降水垂直结构,显示该地区作业潜力最适宜。作业部位在云体中部,作业结束后,影响区云系雷达回波显著增强。由多参数区域动态对比分析法,作业后雷达回波和雨量的K值都有所增加。     

Decadal variability of chlorophyll a in the South China Sea: a possible mechanism

Four climatologies on a monthly scale (January, April, May and November) of chlorophyll a within the South China Sea (SCS) were calculated using a Coastal Zone Color Scanner (CZCS) (1979-1983) and the Sea-viewing Wide Field-of-view Sensor (SeaWiFS) (1998-2002). We analyzed decadal variability of chlorophyll a by comparing the products of the two observation periods. The relationships of variability in chlorophyll a with sea surface wind speed (SSW), sea surface temperature (SST), wind stress (WS), and mixed layer depth (MLD) were determined. The results indicate that there is obvious chlorophyll a decadal variability in the SCS. The decadal chlorophyll a presents distinct seasonal variability in characteristics, which may be as a result of various different dynamic processes. The negative chlorophyll a concentration anomaly in January was associated with the warming of SST and a shallower MLD. Generally, there were higher chlorophyll a concentrations in spring during the SeaWiFS period compared with the CZCS period. However, the chlorophyll a concentration exhibits some regional differences during this season, leading to an explanation being difficult. The deepened MLD may have contributed to the positive chlorophyll a concentration anomalies from the northwestern Luzon Island to the northeastern region of Vietnam during April and May. The increases of chlorophyll a concentration in northwestern Borneo during May may be because the stronger SSW and higher WS produce a deeper mixed layer and convective mixing, leading to high levels of nutrient concentrations. The higher chlorophyll a off southeastern Vietnam may be associated with the advective transport of the colder water extending from the Karimata Strait to southeastern Vietnam.     

Interannual and interdecadal variability of East Asian monsoon and its relation to oceanic processes: a review

A key component of the East Asian climate system is seasonally varying monsoon wind. Its interannual and interdecadal variability, as well as underlying oceanic processes, is the subject of a recent project completed by the Chinese Academy of Sciences. A series of research progress in the areas of monsoon winds, ocean responses, upwelling and productivity has been made and reviewed by this paper.     

三维激光扫描装置设计与数据处理

三维激光扫描仪克服了传统的单点测量方式,可以方便地对实物进行复制建立立体模型。笔者简单介绍了三维激光扫描仪构造及其实现的原理,利用自行购买的激光雷达、相机和电控平台等部件搭建三维激光扫描平台,利用串口通讯实现对激光雷达、相机和电控平台等硬件控制,进一步完成三维激光扫描点云生成及图像获取,并对生成的点云进行了精度校正,最后基于特征点拼接多幅扫描图像并成功地实现了扫描点云和图像的匹配融合,其中点云精度和图像融合效果较好。     

资源一号02C卫星影像在宜溧1∶5万矿山开发遥感调查中的应用研究

遥感技术作为一种先进的探测手段,能及时有效地获取矿山开发的客观数据。以国产资源一号02C卫星数据为数据源,研究了针对性的遥感图像处理方法及流程,在此基础上完成了宜溧非金属矿区矿山开发遥感调查与监测任务;调查工作不仅获取了研究区矿山开发状况及矿山开发占地的客观数据,也为国产资源一号02C卫星数据在矿山开发中的应用提供了范例。     

江西南昌-樟树地区农业土壤环境质量评价

在研究区内,由于各种自然地质作用及人类活动综合影响,使作物营养有益元素及有毒、有害组分在区内表层土壤中的分布存在明显的不均衡性.以土壤中元素的含量分布为主要依据,在分析南昌-樟树地区土壤污染现状、农作物营养有益元素丰缺现状的基础上,对区内农业土壤环境质量进行了评价,并按环境质量的优劣划分了A、B、C、D共4个等级.     

海水中溶解有机碳（DOC）的测定

本文论述了海水中溶解有机碳(DOC)的测定方法,对DOC的测定原理及氧化方法进行了讨论,并提出了妨碍海水中DOC测定准确度提高的因素,这对于建立高准确度和精密度的新分析方法具有重要的意义。     

中国水稻气象情报服务系统的研究

中国水稻气象情报服务系统是一个全国水稻物候和产量动态监测系统。它以我国现行水稻气象监测网数据为信息源,通过系统内有机联系的三类功能模块和若干数据文件,实现对气象旬报的改错、补报和换算;自动建立中近期配套的预测模式,完成包括显示、打印、填图等形式的服务。本文简要介绍了本系统的功能、软件结构和模式组建等研究成果。