论地震科普宣传信息社会化

地震科普宣传具有社会性、科学性、实践性、综合性和时效性相对较强的特点。它作为一种信息,尤其要以科学事实为根据、以自己特殊的规律来表现适应民众心理的实质内容。本文用系统论、心理学、信息论的观点,试图从信息的传播、及馈及其科学管理的角度,探索开展地震防震减灾社会宣传工作的规律,提出如何进一步提高地震科学的社会宣传功能,更好地为四化建设服务的问题,供探讨、交流。     

误差订正在预报集成中的应用研究

根据误差的特性，即误差由系统误差和随机误差组成，对保山5月雨量的几种预报方法的预报结果进行分析，寻找系统误差的订正方法，降低系统误差的影响。将几种预报方法订正后的结果平均从而消除随机误差，其预报结果明显改善，平均误差和均方根误差明显降低，预报准确率明显提高，可以在业务预测中广泛推广应用。     

铜陵-安庆地区若干热液矿床成矿流体研究

文章在研究铜陵狮子山燕山期岩浆热液叠加矿床成矿流体的基础上，对比铜陵-安庆地区燕山期其他类型矿床的成矿流体，系统探讨了该区燕山期热液矿床成矿流体体系，从夕卡岩型、斑岩型、高温热液型至低温脉型矿床成矿流体的演化规律。认为成矿流体温度、盐度逐渐降低，流体来源从单纯的岩浆来源变为岩浆与雨水的混合来源，成矿流体沸腾作用随之减弱。这些典型矿床基本代表了铜陵-安庆地区燕山期热液成矿体系。     

Land Use Structure Optimization Under Systematic Framework

1　ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｓｙｓｔｅｍｏｆｌａｎｄｕｓｅｉｓａｖｅｒｙｃｏｍｐｌｅｘｓｙｓｔｅｍ .Ｗｅｄｒａｗｕｐｔｈｅｐｒｏｊｅｃｔｏｆｌａｎｄｕｓｅｐｌａｎｎｉｎｇｓｔｒｕｃｔｕｒｅｔｏｉｍｐｌｅｍｅｎｔｔｈｅｏｐｔｉ ｍｉｚａｔｉｏｎｏｆｌａｎｄｒｅｓｏｕｒｃｅｓ .Ｔｈｅｏｐｔｉｍｉｚａｔｉｏｎｏｆｌａｎｄｕｓｅｓｔｒｕｃ ｔｕｒｅｉｓｔｈｅｋｅｒｎｅｌｏｆｌａｎｄｕｓｅｐｌａｎｎｉｎｇ .Ｔｏｄａｙ,ｍｏｓｔｏｆｔｈｅｕｒｂａｎｌａｎｄｕｓｅｐｌａｎｓｏｎｌｙｃｏｎｓｉｄｅｒｔｈｅｏｐ…     

坐标参数加权平差法在线路补测中的应用

在线路施工的补充测量控制中,对先期控制点老坐标的如何使用,关系到新坐标的网形精度和与老坐标的差异程度.介绍了对先期控制点坐标进行赋权参加平差的方法,并给出评定结果的指标.用实例分析验证了这种方法的有效性.     

Archival photogrammetric analysis of river–floodplain systems using Structure from Motion (SfM) methods

In this study we evaluate the extent to which accurate topographic data can be obtained by applying Structure from Motion (SfM) photogrammetric methods to archival imagery. While SfM has proven valuable in photogrammetric applications using specially acquired imagery (e.g. from unmanned aerial vehicles), it also has the potential to improve the precision of topographic data and the ease with which can be produced from historical imagery. We evaluate the application of SfM to a relatively extreme case, one of low relative relief: a braided river–floodplain system. We compared the bundle adjustments of SfM and classical photogrammetric methods, applied to eight dates. The SfM approach resulted in data quality similar to the classical approach, although the lens parameter values (e.g. focal length) recovered in the SfM process were not necessarily the same as their calibrated equivalents. Analysis showed that image texture and image overlap/configuration were critical drivers in the tie‐point generation which impacted bundle adjustment quality. Working with archival imagery also illustrated the general need for the thorough understanding and careful application of (commercial) SfM software packages. As with classical methods, the propagation of (random) error in the estimation of lens and exterior orientation parameters using SfM methods may lead to inherent systematic error in the derived point clouds. We have shown that linear errors may be accounted for by point cloud registration based on a reference dataset, which is vital for the further application in quantitative morphological analyses when using archival imagery. Copyright © 2016 John Wiley & Sons, Ltd.     

SYSTEMATIC OFFSET OF BEDROCK CHANNELS ALONG ACTIVE STRIKE-SLIP FAULTS ON THE EASTERN TIBETAN PLATEAU

Offset river is one of the characteristic landforms along active strike-slip fault. Whereas because of various factors such as natural meander, river capture, etc, difficulties exist while interpreting slip motion and offset amount using landforms of offset rivers. In this study, we introduced the systematic offset of bedrock channels as a method to analyze offset rivers along strike-slip fault. Systematic offset of bedrock channels is the result of coupling between tectonic process and surface process. It also describes the phenomenon of synchronous accumulation both of the offset amount and the upstream length because of head-ward erosion. Based on the interpretation, measuring and statistics of the offset river landforms, it is found that systematic offset of bedrock channels have developed along the Ganzi-Yushu, Xianshuihe and eastern Kunlun fault zones on the eastern Tibetan plateau. There is a linear relationship between the upstream length (L), measured from the headwater to the fault, and the offset amount (D):D=a·L. This study provides useful implications to the role of strike-slip faults during the geomorphic evolution of the eastern Tibetan plateau.     

一种卫星钟差精度评估方法

GNSS观测量测量的是测站与卫星间的相对时间延迟,卫星钟差求解的是相对于基准钟的相对钟差,因此卫星钟差的精度评估方法不同于其他GNSS产品。分析了卫星钟差的精度评估方法,采用消除卫星钟系统偏差的方法进行钟差精度的评估,得到的各产品的精度评定结果与各产品公布的钟差精度基本一致,证明了此方法的有效性。