控制性深孔地震输入界面位置的确定方法和影响研究

探讨了在工程场地地震安全性评价的地震反应分析模型中,江苏省盐城地区部分工程场地内深度超过100m时剪切波速仍小于500m/s的控制性深孔,采用近似估算方法弥补所缺波速值和确定地震输入界面后,进行波速值和地震输入界面位置的不确定性对工程场地地震反应的影响研究,包括地表地震动峰值加速度和反应谱特征周期等,为其他地区控制性深孔的地震输入界面位置的确定方法和影响研究提供参考。     

EOS/MODIS资料在渭河洪涝动态监测中的应用

通过对MODIS资料中植被、水体、土壤等不同地物的光谱特性进行分析,提出了一种用于洪涝灾害监测的遥感资料处理流程和量化判识指标及淹没面积估算方法.并在2003年渭河流域洪涝灾害的监测中进行了实际应用,效果良好.     

基于3D产品制作三维地形数据模型

随着GIS和3D打印技术的革新与进步,打印三维地形图已具备可行的条件。基于已有的3D产品(DLG、DOM、DEM),使用现有的专业GIS软件,可以快速地制作三维地形图数据模型,配以色彩丰富、样式美观的三维地图符号,即可输出3D打印格式的三维地形数据模型,并选择合适的打印材料和打印机进行制作,可以丰富测绘产品的形式,促进3D打印地形图产业的迅速发展。     

陕西省精细化气象格点预报数据环境的设计与实现

为了有效支撑陕西省精细化气象格点预报业务运行,从底层架构和数据流分析入手,提出了基于CIMISS标准框架的精细化格点预报数据环境的设计方案。包括硬件平台、数据清单、数据存储、数据共享、数据管理等关键环节,并遵循"冷热分离、读写分离、集中化管理、多样化共享"的原则,给出了优化实现方法。     

“院士专家地勘行”为浙江地勘事业发展支招献策

日前,浙江省地质勘查局开展"院士专家地勘行"活动,在浙江地勘事业改革转型的关键时期,邀请局系统内六个院士专家工作站的相关进站院士及教授专家团队为地勘事业发展支招献策。中国科学院院士陈旭、杨文采、金振民、杨树锋及浙江大学、中国地质大学(武汉)相关教授专家出席活动,浙江省地质勘查局党委委员。     

无人机气象灾害应急平台的设计

根据目前我国民用无人机的性能和分类,结合广东省突发应急事件的要求,对广东省无人机气象灾害应急平台设计进行了探讨。结果表明,建立全省应急无人机统一框架,需要规范无人机视频采集格式。由无人机、通信以及地面测控等组成的无人机平台,具有集航线设计、显示回放、多媒体采集、喊话及二次开发等功能。对于不同地域的应急应选用不同类型的无人机,城市应急选用自带降落伞的多旋翼无人机;山区应急选用具有垂直起降功能的固定翼无人机;海上应急选用长航时、速度快、抗风能力强且能在沙滩上起降的固定翼无人机。     

基于证据加权模型的青海拉陵灶火地区矿产靶区预测及效果评价研究

当代矿产资源评价是复杂高维非线性系统的建模与评价过程,建立能够描述综合信息间复杂关系的多元非线性统计模型并预测矿产靶区,对矿产勘查具有重要指导意义。本文基于GIS软件平台,将证据加权模型应用于青海拉陵灶火地区矿产靶区预测,提取研究区成矿地质背景信息,遥感地质信息,地球化学异常信息等17种致矿综合信息,建立研究区矿产靶区预测模型,绘制成矿后验概率分布图,并利用ROC曲线分析方法对预测结果进行效果评价,根据ROC曲线的TP率和FP率计算圈定矿产靶区概率阈值,对研究区矿产靶区进行了圈定,结果表明证据加权和ROC曲线分析相结合圈定的成矿靶区与已知矿点分布较为吻合,该方法用于矿产靶区预测具有一定的可行性。     

Design and Test of 1/5th Scale Horizontal Axis Tidal Current Turbine

Tidal current energy is prominent and renewable. Great progress has been made in the exploitation technology of tidal current energy all over the world in recent years, and the large scale device has become the trend of tidal current turbine (TCT) for its economies. Instead of the similarity to the wind turbine, the tidal turbine has the characteristics of high hydrodynamic efficiency, big thrust, reliable sealing system, tight power transmission structure, etc. In this paper, a 1/5th scale horizontal axis tidal current turbine has been designed, manufactured and tested before the full scale device design. Firstly, the three-blade horizontal axis rotor was designed based on traditional blade element momentum theory and its hydrodynamic performance was predicted in numerical model. Then the power train system and stand-alone electrical control unit of tidal current turbine, whose performances were accessed through the bench test carried out in workshop, were designed and presented. Finally, offshore tests were carried out and the power performance of the rotor was obtained and compared with the published literatures, and the results showed that the power coefficient was satisfactory, which agrees with the theoretical predictions.     

东海沿海季节性海平面异常成因

Based on the analysis of sea level, air temperature, sea surface temperature(SST), air pressure and wind data during 1980–2013, the causes of seasonal sea level anomalies in the coastal region of the East China Sea(ECS) are investigated. The research results show:(1) sea level along the coastal region of the ECS takes on strong seasonal variation. The annual range is 30–45 cm, larger in the north than in the south. From north to south, the phase of sea level changes from 140° to 231°, with a difference of nearly 3 months.(2) Monthly mean sea level(MSL)anomalies often occur from August to next February along the coast region of the ECS. The number of sea level anomalies is at most from January to February and from August to October, showing a growing trend in recent years.(3) Anomalous wind field is an important factor to affect the sea level variation in the coastal region of the ECS. Monthly MSL anomaly is closely related to wind field anomaly and air pressure field anomaly. Wind-driven current is essentially consistent with sea surface height. In August 2012, the sea surface heights at the coastal stations driven by wind field have contributed 50%–80% of MSL anomalies.(4) The annual variations for sea level,SST and air temperature along the coastal region of the ECS are mainly caused by solar radiation with a period of12 months. But the correlation coefficients of sea level anomalies with SST anomalies and air temperature anomalies are all less than 0.1.(5) Seasonal sea level variations contain the long-term trends and all kinds of periodic changes. Sea level oscillations vary in different seasons in the coastal region of the ECS. In winter and spring, the oscillation of 4–7 a related to El Ni?o is stronger and its amplitude exceeds 2 cm. In summer and autumn, the oscillations of 2–3 a and quasi 9 a are most significant, and their amplitudes also exceed 2 cm. The height of sea level is lifted up when the different oscillations superposed. On the other hand, the height of sea level is fallen down.     

一种实用海洋浮标数据异常值质控方法

针对海洋浮标的波高观测数据,通过结合格拉布斯准则(Grubbs)、局地异常值检验方法和波高观测误差控制建立了一种实用的数据异常值质控方法并对波高观测异常值进行了质控效果检验。结果表明,该质控方法由于加入了波高观测误差控制,从而避免了将大量正常数据误判为异常数据,异常数据判断的准确率达到了较高水准。另外该方法也可以作为一种实用质控方法推广使用于其他海洋浮标观测要素。