石化企业重大泄漏事故建模及GIS图形模拟的研究

有毒、有害物质泄漏是石化企业的重大事故,严重威胁企业和社会的安全.以石化企业乙二醇、丙烯腈装置产生的有毒、有害物质泄漏、扩散和污染范围的理论模型为根据,提出有毒、有害物质的地理信息系统（GIS）扩散图形模拟方法.通过对泄漏物质污染范围的确定,便于救援人员能够按照事故的影响范围,准确、及时的制定出救援方案,减少财产的损失.     

考虑了错误恢复的测井数据远程无线传输技术

测井资料远程传输是服务公司迫切需要解决的问题,本文介绍的测井数据远程传输技术,可以有效地解决测井数据的传输问题,同时与CifNet多井数据管理系统有机结合,使测井数据传输、入库、管理及查询实现了自动化,提高了测井资料周转时间。该技术采用了数字签名技术,实现了数据传输的断点续传和错误恢复功能,保证了测井数据传输的高效性和可靠性。     

云南地区两个区域台网测定近震震级标度的比较

本文对昆明电信传输台网测定的持续时间震级标度(M_D)与云南区域地震台网测定的振幅震级标度(M_L)的结果进行了比较,发现当 M_L>3.0级以上时,M_D 比 M_L 普遍偏大,于是确定了这两个台网震级系统间的统计关系。并用昆明电信传输台网记录的1982年至1985年发生的178个近震资料,建立了用该台网记录的水平向和垂直向地震波持续时间测定云南地区近震震级的单台震级公式和台网平均公式。     

江苏省水利地理信息服务平台资源注册系统的分析与设计

对江苏省水利地理信息服务平台资源注册系统的需求进行了分析,对系统的用户类型进行了划分,介绍了系统的用例,在此基础上对系统的设计进行了探讨。     

山东省昌邑市石埠地区金矿化特征及矿化机制探讨

石埠地区位于胶北隆起西南缘,区内北北东向断裂构造格架下发育的次级断裂带见金矿化带和低品位工业矿体.矿化带受区域性北北东向断裂构造控制,岩石具碎裂状构造,发育黄铁矿化、绢英岩化、绿泥石化等围岩蚀变,属岩浆期后热液脉状金矿床,成矿活动与元古代中-晚期和印支期两期次岩浆活动密切相关.成矿时代为新元古代和印支-燕山期两期次,古...     

水母(沙海蜇)降解与营养盐(氮、磷)释放的模拟与实证

The aim of this study was to investigate nitrogen and phosphorus released in the process of the decomposition of giant jellyfish in the laboratory and found the evidence to verify the influence of nutrients released by the decomposition of jellyfish on the ecosystem in the field. The release of nitrogen and phosphorus from the decomposition of Nemopilema nomurai was examined in a series of experiments under different incubation conditions such as different p H values, salinity values, temperatures and nitrogen and phosphorus concentrations. The results showed that the complete decomposition of Nemopilema nomurai generally took about 4–8 d. The release of nitrogen and phosphorus from the decomposition of Nemopilema nomurai could be divided into two stages: the early stage and the later stage, although the efflux rate of nitrogen was one order more than phosphorus. In the early stage of the decomposition of Nemopilema nomurai, the concentrations of dissolved nitrogen, dissolved phosphorus, total nitrogen and total phosphorus in seawater increased rapidly, and the concentration of nitrogen could reach the highest level in the whole degradation process. In the later stage of the decomposition, the concentrations of dissolved nitrogen and total nitrogen declined slowly, while the concentration of phosphorus in water could reach a maximum in the degradation process. High p H, low salinity,high temperature and N/P will promote the release of nitrogen; low p H is unfavorable to the release of nitrogen but favorable to the release of phosphorus. In addition, we found the concentrations of ammonium and phosphate in the bottom water were higher than those in the surface water during the period of jellyfish bloom in the Jiaozhou Bay, proving that nutrients released by the decomposition of jellyfish have significant influence on nitrogen and phosphorus in the field. For the whole Yellow Sea, nutrients released by jellyfish carcasses may reach up to(2.63±2.98)×107 mol/d of dissolved nitrogen(DN) and(0.74±0.84)×106 mol/d of dissolved phosphorus(DP) during the period of jellyfish bloom. The values are comparable to riverine inputs in a day, but much higher than sediment–water exchange flux in the Yellow Sea. The great amounts of nutrients must have significant influence on the nutrients balance of the Yellow Sea during the period of jellyfish dead and decomposition. Both the experimental data and field observations proved that the decomposition of jellyfish may release a great amount of nutrient to the surrounding environment during the period of jellyfish decomposition.     

无人机机载LiDAR技术在抽水蓄能电站库区岩溶识别中的应用

西南岩溶山区,植被茂密,地形陡峻,传统地面岩溶调查手段效率低且危险性高。本文采用机载LiDAR技术,获取四川某抽水蓄能电站库区激光点云和光学影像数据,结合室内解译和野外复核,开展区域岩溶识别工作。查明了库区内岩溶发育分布情况,根据岩溶形态划分为岩溶漏斗、岩溶洼地及落水洞3类。基于已有资料和LiDAR数据成果提取库区高程、坡度、坡向、构造、岩性及汇水区因子,并分析了岩溶发育的分布规律。结果表明,无人机机载LiDAR技术可精准快速识别抽水蓄能电站库区岩溶分布特征,为水电站前期勘察设计提供了新的技术手段。