The Improvement of Earthquake Real-Time Monitoring System of Chinese National Digital Seismic Network

The earthquake real-time monitoring system of the Chinese National Digital Seismic Network has been in operation since "the Ninth Five-year Plan" period, and the stability of the system has been well tested. In recent years, with the continuous improvement of monitoring technology and increase of public demands, the original real-time monitoring system needs to be upgraded and improved in terms of timeliness, stability, accuracy and ease of operation. Therefore, by accessing a total of more than 1,000 seismic stations, reducing the seismic trigger threshold of the monitoring system, eliminating the false trigger stations and optimizing the seismic waveform display interface, the current earthquake monitoring demands can be satisfied on the basis of ensuring the stable operation of the system.     

Estimation of genetic parameters for upper thermal tolerances and growth-related traits in turbot Scophthalmus maximus

An abnormally high temperature produces a stress response in turbot causing large economic losses in the turbot aquaculture industry of China.A genetic improvement of the upper thermal tolerance(UTT)of turbot could allow cultured fish to adapt.A genetic evaluation of UTT is required for determining the practicability of including this trait into a breeding program.In this study,data were recorded from a temperature tolerance test conducted on 3 200 individual turbots from 32 full-sib groups.A cross-sectional linear model and a cross-sectional threshold probit model were used to analyze the test-period survival and a cross-sectional threshold logit model was used to analyze the test-day survival.In addition,phenotypic and genetic correlations between body weight and survival data were estimated.The estimated heritability values obtained from the cross-sectional linear model(CSL),the cross-sectional threshold(probit)model(THRp),and the cross-sectional threshold(logit)model(THR1)were 0.247 9±0.108 3,0.288 3±0.161 2,and 0.106 9±0.045 2,respectively.The correlation coefficients among the full-sib family estimated breeding values(EBVs)obtained from the three models were greater than 0.998 6 and all models produced an almost identical family ranking.The accuracies of selection obtained with the CSL,THRp,and THR1 model were0.773 8,0.775 4,and 0.784 4,respectively,the greatest from the THR1 model.The genetic correlations between body weight and survival data EBVs from the CSL,THRp,and THR1 models were 0.020 1,-6.201 1 ×10-4,and-3.115 4×10-4,respectively,and the phenotypic correlations between the two traits were-0.837 1 and-0.667 1,respectively.The findings of this study provide background information to determine the best strategy of selection for the genetic improvement of UTT in turbot.     

世界海洋地质调查发展历程与启示

综合考虑社会发展、文明演进、国家需求、科技进步、人才成长等因素,将世界海洋地质调查发展历史划分为"萌芽期""初创期""发展期""成熟期"和"升级期"5个阶段,探讨了不同阶段海洋地质调查的工作目标、主要特点和标志成果等,在此基础上总结凝练历史发展规律和启示,并结合我国实际提出海洋地质工作发展的相关建议。     

国内外海岛固体废弃物处置方式研究

文章概述了国内外海岛固体废弃物的产生特点和处置方式;针对海岛面临的问题,重点讨论了海岛固体废弃物处置的建议以及对我国海岛发展的启示。研究结果表明:海岛固体废弃物人均产量一般高于大陆地区,但由于地理位置和气候条件的特殊性,为解决海岛土地资源不足、运输成本高、总量逐渐增多、技术不足等问题,建议海岛固废源头减量、优化处理工艺。同时,总结出3种海岛固废处置方式,一是将固废打包运输至大陆处理,适合于距离大陆较近、人口数量少的小海岛;二是清洁堆肥和无害化焚烧处理技术,适用于种植业和旅游业发展兼重的海岛;三是在分类收集的基础上,固废中废品回收再利用,有机组分通过生物降解制备燃料,最大化利用固废的资源特性,弥补海岛能源匮乏不足,是海岛固废最为理想的处置方式。     

资源三号02星双频GPS快速精密定轨

采用资源三号02星双频GPS观测数据和CODE快速星历,利用非差简化动力学方法实现卫星精密定轨。通过卫星轨道重叠弧段检验,轨道径向精度优于3.90 cm,位置精度优于5.52 cm。利用SLR观测数据检核卫星轨道,精度优于4 cm。采用轨道外推和瞬时根数方法预报轨道,12 h内切向精度优于30 m。     

天然场音频电磁法在蒙古国朝格陶勒盖铜铅锌多金属矿勘查中的应用研究

通过天然场音频电磁法在朝格陶勒盖铜、铅、锌多金属矿区的研究工作,结合地质资料并运用EH4 Data Processing Program数据处理软件,对采集数据进行有效提取,实现了天然场信号的有效加密,并应用于推测和圈定矿区内中、深部地下构造及围岩蚀变接触带位置等.通过后期钻孔验证表明,该方法能够提供丰富的找矿信息.在...     

黄土高原东部(山西阳曲)1.2Ma以来黄土记录的两次显著干旱化事件

重建第四纪时期亚洲内陆干旱过程和沙漠的扩张历史对于我们了解东亚冬季风演变具有重要意义.然而目前对于黄土高原的干旱过程的研究主要聚焦于吕梁山以西的黄土地区,对于其东部还缺乏相应研究.为此,我们对吕梁山东部约1.2 Ma以来的阳曲黄土剖面进行了磁化率和元素含量测试,结果显示阳曲地区在1.2 Ma以来经历了两次明显的干旱事件...     

塔里木盆地瓦基里塔格辉长岩^40Ar—^39Ar年龄及其意义

瓦基里塔格位于新疆塔里木盆地塔中构造带 （即中央隆起） 的西部, 巴楚县城南东约４０ｋｍ 。这里发育一套轻微变质的碎屑岩哑地层, 其中有基性－超基性岩体侵入。对在此采集的２ 块辉长岩样品进行Ａｒ－Ａｒ定年, 获得的坪年龄分别为８２５．０±２．０Ｍａ 和８３７．３±２．０Ｍａ, 相应的等时年龄为８２１．４±８．０Ｍａ和８３３．３±１５．３Ｍａ。这是首次获得的塔里木盆地腹地较可靠的前寒武纪同位素年龄数据, 为塔里木盆地的构造类型、基底性质、组成和时代等地质问题的正确认识, 提供了一份重要的基础资料, 对于该地区的油气勘探部署也有十分重要的意义。     

基于尺度不变特征变换的云导风计算方法

提出了基于尺度不变特征变换的云导风计算方法,通过计算图像的尺度不变特征点并进行特征点匹配得到云导风矢量结果。选取风云2号卫星拍摄的卫星云图作为实验基础数据,运用传统的最大相关系数法和基于尺度不变特征变换的匹配方法,对得到的两种计算结果进行对比分析。结果表明:基于尺度不变特征变换的匹配方法计算得到的有效风矢量较多,且分布有规律,能很好地应对不同情况的云团情况计算出合理的风矢量结果。     

基于北斗三号的高速公路压实监测应用

目前BDS-3系统已经正式向全球开通,BDS-3卫星在工程监测上带来的精度提升也成为研究人员关注的热点。针对高速公路建设过程中路基填筑时关注的压实层厚度问题,文中采用GPS与BDS组合RTK定位方式,分别设计实时计算方案和后处理方案。分析基于BDS-3的多系统组合定位在高速公路路基施工监测中的应用效果,通过统计36个布设点的结果,多系统定位U方向结果与水准测量结果相比偏差在cm级,整体压实层厚偏差小于2 cm,该方案在减少人力需求的同时能达到实时监测的需要,在路基施工监测中有重大应用价值。