HY1660多通道扫测测深系统的软件设计          下载免费PDF全文

雷东  于政 《海洋测绘》2010,30(1):73-75

介绍了HY1660多通道扫测测深系统的设计需求、设计原理和工作流程,对其核心控制软件的设计思路、功能模块的划分和相互之间的联系进行描述,对姿态修正、实时数据压缩、动态三维显示等重要功能模块的实现方法做了详细阐述。最后用实测数据显示来证实软件设计的有效性。  相似文献   

Effect of placer mining on suspended sediment in reaches of sensitive fish habitat     

S. B. Pentz  R. A. Kostaschuk 《Environmental Geology》1999,37(1-2):78-89

 The McQuesten River system in central Yukon Territory, Canada, contains placer mines and reaches of sensitive fish habitat. Suspended sediment is supplied to the system by erosion of previously mined disturbed areas, bank erosion, resuspension of placer sediment deposited on bars, and active placer-mine discharges. Direct discharge from active placer mines did not have a large impact on suspended sediment in reaches of sensitive fish habitat in 1994–1995, although only two mines were active and concentrations did periodically exceed water quality objectives. Erosion of previously mined disturbed areas had a pronounced effect on suspended sediment during spring snowmelt and summer rainstorms in 1994–1995. Deposits in previously mined areas should be stabilized to reduce erosion and its downstream impact on fish habitat. Received: 10 November 1997 · Accepted: 30 March 1998  相似文献   

降低采矿贫化率与损失率的几个问题     

张永海 《国土资源》1999,(3)

采矿贫化率与损失率的降低是采矿工作者重点研究和攻克的难点之一。必须通过严格合理的采矿顺序，不断加强和提高采矿设计质量，强化施工管理等措施才能使其下降到理想水平。  相似文献   

基于MCR模型的南方稀土矿区生态安全格局分析   总被引：4，自引：2，他引：4  

李恒凯  刘玉婷  李芹  王秀丽 《地理科学》2020,40(6):989-998

南方稀土矿区是世界上主要的离子型稀土矿生产基地，对当地乃至中国都带来了不可估量的经济价值，但是在追求稀土开采的经济效益的同时，由于采矿工艺的不足，产生了一系列环境问题，威胁矿区的生态安全。以赣州岭北稀土矿区为例，基于景观生态安全格局理论及最小累积阻力模型（Minimum Cumulative Resistance Model，MCR）方法，对矿区的生态源地、生态廊道、生态节点等进行判别与分析，构建了矿区2009、2013和2018年3个年份的景观生态安全格局。结果表明：① 稀土矿区的生态源地的斑块面积较小，主要集中于矿区的东西两侧。② 在选取年份期间，稀土矿区的生态源地面积、生态廊道、辐射通道及生态节点数量都在不断增加，表明在这9 a间，稀土矿区景观生态安全状况得到了一定的改善，但相关部门仍需对稀土矿区的生态安全格局进行进一步的规划和优化。  相似文献   

Geochemical assessment of an analogue site for an engineered landform at Ranger Uranium Mine, Northern Territory, Australia     

S. J. Riley  J. F. Rich 《Environmental Geology》1998,34(2-3):203-213

 An essential element in identifying sites as analogues for the long-term development of soils and vegetation on engineered landforms of the rehabilitated Ranger Uranium Mine, Northern Territory, Australia, is the need to match rocks. Comparison of the geochemistry of rocks from the waste rock dump of Ranger Uranium Mine and the potential analogue site of Tin Camp Creek area, Western Arnhem Land, indicates that there are several sites along Tin Camp Creek that may be used as analogue sites. Detailed comparisons between the Ranger and Tin Camp Creek lithologies have been undertaken using a variety of techniques, including cluster analysis. It is demonstrated that at least 70% of the rocks being mined at Ranger have analogues in the Tin Camp Creek area. Received: 2 October 1996 · Accepted: 4 November 1997  相似文献   

云台40m射电望远镜的指向误差校正     

高冠男  汪敏  施硕彪  高亦菲  董江  龚玲平 《天文研究与技术》2007,4(2):188-194

首先综述了射电望远镜指向误差校正的原理并对软件校准的两种方法进行了比较。其次阐述了利用软件校准的方法对云南天文台40m射电望远镜进行指向校正的过程,并给出其指向校正结果。结果是经过指向校正后该射电望远镜的指向精度达到观测要求。  相似文献   

Some Unresolved Issues in Ocean Pipes Aspirating Fluid     

钱勤  王琳  倪樵  黄玉盈 《中国海洋工程》2008,22(1):171-180

This paper reviews the dynamics of ocean pipes aspirating fluid and presents a selective review of the research undertaken on it. It focuses on the equations of motion, fluid-solid interaction at the inlet of the free end of the pipe, the stability mechanism of pipes aspirating steady fluid, etc. In particular, some unresolved or partly resolved issues on these important aspects are discussed. Finally, the promising future development in this area is discussed.  相似文献   

煤矿采空沉陷预测因素分析及计算方法   总被引：1，自引：1，他引：0  

张作礼  张作伟 《山东国土资源》2009,25(8):30-33

采空沉陷的预测是矿山开发利用、矿山地质环境保护与治理的重要依据，该文论述了影响煤矿采空沉陷预测的各种因素和应注意的问题，提出了易操作、直观、可动态管理的计算方法，以及矿山在开始采矿之前必须开展地表岩移监测等合理化建议。  相似文献   

多波地震资料处理系统的集成测试方法     

王玉贵  朱光明  李庆春 《地球科学与环境学报》2000,22(1)

概述了常用的软件集成测试方法 ,包括由模块组装成系统的两种常用方法及相应的优缺点 ,研究了多波地震资料处理系统测试工作的特点 ,结合实际 ,给出了多波地震资料处理系统的测试方法和步骤 ,对其中测试用例的设计原则进行了讨论。  相似文献   

Source of and potential bio-indicator for the heavy metal pollution in Ny-(A)lesund, Arctic     

Wang Xiaofei  Yuan Linxi  Luo Honghao  Long Nanye  Wang Yuhong  Sun Liguang 《极地研究(英文版)》2007,18(2)

Three kinds of tundra plant samples including Dicranum angnstum(a type of boreal bryophyte) , PuccineUia phryganodes (a type of fringy p/ant),Salix polaris (a type of vascular plant) and surface soil were samples in 200 at Ny-Alesund of the Arctic.The levels of eight heavy metal elements (Hg, Pb, Cd, Cu, Zn, Ni, Fe and Mn) and three metal-like dements (As, Se, Sr) in the plant and soil samples of the areas within previous coal mining activities are significantly higher than those of other areas.The relative accumulation of these elements in these tundra plant samples is consistent with the one in the soft samples, especially in the areas affected by previous coal-mining activities.Thus, the pollution is apparently from local coal mining activity.Dicranum angustum has the highest concentrations among those elements, and it can be a good bio-indicator for heavy metal pollution in Ny(A)lesund.Though Ny(A)lesund is less polluted by heavy metal than nearby Northern European human living areas, but much more than the tundras of the Alaska, Greenland and the Antarctic.  相似文献