90年代天气雷达监测网建设与发展

介绍美国、欧洲、中国９０年代高级天气雷达监测网建设与发展概况和瑞士的Ｍｅｔ－Ｎｅｔ高级气象雷达数据网系统的主要技术特色     

Research on formation density MWD instrument in engineering geological exploration

A high efficiency method is very important in geological survey for a new city in China. Geophysical parameters are Measured While Drilling(MWD), and these parameters are processed and explained on the ground, so the method can replace conventional engineering geological exploration for drilling rock sample. According petroleum engineering MWD, using the different characters of different rock absorbs γ radial, with the method of storing data in hole and explaining data on the ground, engineering geological exploration formation density MWD is researched. The MWD works stabilized, and the performance is good with precise data.     

面向多分辨率DEM的河网相似性测度与分析

河网是地形结构的核心要素,能够有效地反映DEM对地表形态的刻画能力.实现不同分辨率条件下DEM河网相似性测度对DEM地形综合、DEM质量评估及DEM不确定性分析等研究具有重要意义.基于此,本文以黄土高原典型样区为研究区,基于5 m高精度DEM建立的多分辨率DEM数据集,构建了地形特征自适应的DEM河网自动提取方法,建立...     

Characteristics of Radar Echo Parameters and Microphysical Structure Simulation of a Short-Time Heavy Precipitation Supercell

By using the conventional observations, radar data, NCEP/NCAR FNL 1°×1° reanalysis data and numerical simulation data and with the construction and calculation of radar echo parameters, this paper presents the structural characteristics and physical processes of a short-time heavy precipitation supercell that occurred in the squall line process in Shanxi Province on 24 June 2020. The results show that this squall line event occurred in front of a surface cold front,combined with infiltration of ...     

巴楚-伽师6.8级地震地质灾害及未来地震地质灾害

2003年2月24日新疆巴楚—伽师交界地区发生了MS6.8地震。地震的发生除了对建筑物及构筑物与水利、交通、电力、电信设施造成了不同程度的破坏外,在地震烈度Ⅶ度以上(包括Ⅶ度)地区产生了不同程度的地震地质灾害。地震地质灾害主要为场地砂土液化、地裂缝与河流陡岸滑塌等类型。随后在新疆巴楚—伽师6.8级地震灾区开展了地震小区划工作,对Ⅶ、Ⅷ、Ⅸ度区进行了场地工程地质条件勘测与综合评价,判定该地区未来可能产生的主要地震地质灾害为场地砂土液化、河流陡岸滑塌。     

Study on the Free Radical Scavenging Activity of Sea Cucumber(Paracaudina chinens var.) Gelatin Hydrolysate

Gelatin from the sea cucumber(Paracaudina chinens var.) was hydrolyzed by bromelain and the hydrolysate was found to have a high free radical scavenging activity. The hydrolysate was fractionated through an ultrafiltration membrane with 5 kDa molecular weight cutoff(MWCO). The portion(less than 5 kDa) was further separated by Sephadex G-25. The active peak was col-lected and assayed for free radical scavenging activity. The scavenging rates for superoxide anion radicals(O2·-) and hydroxyl radi-cals(·OH) of the fraction with the highest activity were 29.02% and 75.41%,respectively. A rabbit liver mitochondrial free radical damage model was adopted to study the free radical scavenging activity of the fraction. The results showed that the sea cucumber gelatin hydrolysate can prevent the damage of rabbit liver and mitochondria.     

滇西区域构造应力场分析

云南地处印度板块、欧亚板块—中国大陆碰撞带东缘,地壳运动剧烈,主要受到印度板块NE向挤压与川滇菱形块体SSE滑移的联合作用.在构造上,云南地区可以划分为滇缅泰板块、印支板块、扬子板块、华南板块等4个一级构造单元和腾冲块体、保山块体、兰坪—思茅弧后盆地、盐源—丽江陆缘坳陷、滇中坳陷、康滇古隆起、滇东坳褶等7个二级构造单元...     

Galileo系统接收机测距性能分析

Galileo系统是欧盟提出并正在研制建设的全球卫星导航定位系统,本文从用户使用角度出发,简要论述了Galileo系统频率计划和信号体制设计情况,详细分析了不同频点、不同信号体制下Galileo系统接收机测距性能。     

胶州市创新土地管理水平服务全市经济发展

近年来,胶州市国土资源局认真落实科学发展观,紧紧围绕全市“3211”发展目标,切实履行“保护资源、保障发展、维护权益、服务社会”的职责,不断创新工作思路,理顺工作机制,打造一流队伍,积极服务全市经济发展。1创新思路保障发展2006年以来,胶州市国土资源局认真学习领会上级新政策、新法规,创新思路,争取主动,积极为全市经济发展打造强势平台。在青岛市国土资源局下发提报2006年度建设项目资料的通知前,提前做好了333余公顷(5000多亩)土地的材料准备工作。同年3月,又获批年度农转用计划指标263.53 hm2。面对用地指标紧张的形势,该局又争取…     

滦河流域碳、水循环和能量平衡遥感综合试验总体设计

始于20世纪80年代的系列大型遥感试验开始系统研究地表物质和能量交换过程,对遥感与地球系统科学研究的结合起到重要作用,但是尚无综合利用多源遥感数据解决碳、水、能量循环问题的有效方案.遥感科学国家重点实验室于滦河上游地区组织开展基础性、多学科、多尺度的"碳、水循环和能量平衡遥感综合试验".本次试验面向地球系统科学对遥感观...