城市生态环境分区遥感综合分析--以贵阳市城区为例

建设环境良好的城市是人居环境应用研究的重点领域。而人居环境的研究则涉及到宏观和中、微观层次,是自然生态系统和人工生态系统的结合。在建设可持续发展的人居环境的过程中,遥感、地理信息系统、全球定位系统技术对空间数据和属性数据处理、管理、分析可以发挥积极的作用。本文以贵阳市城区为例,探讨了"3S"技术在人居环境研究中城市生态环境分析,以期对贵阳市城市规划提出具体的改进建议,使之更符合建设良好的人居环境的要求。     

大管岛多能互补独立发电系统的发电量设计

结合大管岛居民用电需求,论述了当采用波浪能、太阳能、风能多能互补的独立发电系统时的发电量设计,并根据电力需求与波浪能、太阳能、风能能源资源的季节性变化进行了多能互补的供电效果分析.     

我国东海藻华新记录种多环旋沟藻赤潮事件分析

由多环旋沟藻（Cochlodium polykrikoides）引发的有害赤潮在全球频繁暴发,2010年8月间,在我国浙江温岭石塘海域也暴发了此种的赤潮,而该藻则是东海藻华的新记录种。多环旋沟藻赤潮发生于富营养化的近岸水体,赤潮发生区内水温变化范围为27.5℃～31.2℃,盐度变化范围为31.957～32.998。赤潮暴发期间藻细胞最高密度达2.8×106个/L。文章探讨了此次赤潮暴发的原因及防治对策。     

古尔班通古特沙漠南缘梭梭茎干液流变化及其对环境因子的响应

利用TDP热扩散式茎流计,结合气象观测系统,对古尔班通古特沙漠南缘原生梭梭的树干液流及环境因子进行连续监测,分析了梭梭树干液流对环境要素的响应,基于潜在蒸散发和蒸腾需求指数对梭梭茎干液流进行了模拟。结果表明：（1）梭梭树干液流在晴天的日变化呈单峰曲线,液流速率上升阶段时间短于下降阶段时间,与气象因素的日变化规律不一致。不同季节梭梭树干液流速率日变化规律存在差异,夏季液流与春季、秋季相比,启动早,停止晚,峰值更大且发生更早。（2）环境要素间存在着不同程度的相关性,主成分分析表明：前三个主成分共能解释85%的环境信息,其中以空气湿度、空气温度、水汽压亏缺、潜在蒸散发、净辐射为主的第一主成分能解释47%环境信息变化,以土壤温度、水汽压为主的第二主成分能解释20%环境信息变化,以土壤含水量、风速为主的第三主成分能解释17.6%的环境信息变化。（3）在春季和夏季基于潜在蒸散发的S型模型模拟梭梭液流速率的精度更高,在秋季基于蒸腾需求指数模拟的梭梭液流速率的精度更高。（4）梭梭树干液流速率与大气水分亏缺、净辐射、潜在蒸散发之间存在非对称响应,且不同季节间的响应规律存在差异,在春季和秋季,液流速率与水汽压亏缺呈顺时针状,与净辐射、潜在蒸散发呈逆时针状;在夏季,液流速率与水汽压亏缺呈顺时针状,与净辐射、潜在蒸散发呈斜8字顺时针状。     

DISASTER ANALYSIS AND COUNTERMEASURES OF LAND SUBSIDENCE CAUSED BY COAL CUTTING IN CHINA

In recent years, many coal-producing countries have paid great attention to the land subsidence causedby coal cutting. In China, because of the dense population in coalfield areas, the land subsidence hazard is more seri-ous. After a brief analysis on the mechanism of land subsidence, this paper gives a comprehensive and systematical ac-count on all kinds of hazards caused by the land subsidence in China. The study shows that land subsidence has endan-gered land, buildings, traffic and communication lines, dykes and dams. It also causes damage to ecological and socialenvironment. In order to lessen the hazard of land subsidence, preventive measures should be taken to reduce the col-lapse amount, such as extraction with stowing, banded mining system, succession and coordination mining system, orhigh-pressure mudflow between rock strata. Measures of reinforcing or moving certain buildings should also be taken toreduce the destructive degree. In order to harness the subsidence land and bring them under control for fanning, mea-sures should be taken such as filling with spoil or fine breeze, excavating the deeper and covering the shallower land.     

延安新区地表垂直形变时空演化的经验正交函数分析

采用SBAS-InSAR技术对43景Sentinel-1A影像进行处理,获取延安新区（北区）地表形变信息,并运用经验正交函数对结果进行分解,得到研究区域的时间系数和空间分布。结果表明,延安新区（北区）的最大沉降速率为-56 mm/a,最大抬升速率为32 mm/a。从第1模态可以看出,挖方、填方是造成地表抬升和沉降的主要原因;第2模态则反映了工程建设不同时期对应的不同地表形变状态,即加速、减缓、平稳3个阶段。     

知识不确定条件下的海外保障基地自然风险情景模拟评估

针对海外保障基地面临的自然风险,在风险辨识基础上,构建了风险评价指标体系和海外保障基地自然风险的贝叶斯网络评估模型,并进行了情景模拟下的量化实验评估。针对目前贝叶斯网络评估过程中的群决策和决策偏好问题,引入了犹豫层次分析思想来优化计算指标风险隶属度,改进了评估过程中的客观性和适用性。     

加权方差分析及其在地壳垂直运动中的应用

经典最小二乘准则下的方差分析要求观测值的正态随机误差之间是相互独立的，而实际遇到的测量数据经常并不满足这一条件。为了从广泛意义上更科学地研究和应用方差分析这一理论，提出了加权方差理论，导出和论证了相应的公式，并以实例讨论了它在地壳垂直运动分析中的应用。     

GIS技术在矿业权价款评估中的应用研究

地理信息系统(GIS)在国土及矿政管理中进行了广泛的应用,取得了很好的效果。本文研究利用GIS空间分析功能在矿业权范围内分析涉及国家出资地质勘查项目情况,统计矿业权范围内占国家出资地质勘查面积,依据相关的法律和法规进行价款计算,为矿业权登记、转让等环节中价款评估提供科学依据。     

Mineral occurrence for Dachang gold deposit and its impact on gold recovery rate in Qumarleb County,Qinghai

Based on X-ray diffraction, optical microscopy and scanning electron microscopy analysis of the Dachang gold ore, it is showed that the sulfide of ore is the main carrier minerals of gold. A majority of gold is embedded in pyrite and tetrahedrite as the form of inclusion and a small amount intergrowth with pyrite and gangue mineral, occasionally the presence is in form of monomer natural gold. The main factors which influence the recovery rate are sulfide mineral particle size, and the fine grained sulfide is beneficial for the dissociation and flotation of gold bearing minerals. The monomer dissociation degree of gold bearing minerals can reach 91.3% , when the grinding fineness is less than 0. 074 mm and grain level accounts as 80%. It is not conducive to the flotation of sulfide if the grinding fineness is low or high. It is difficult to completely dissociate the monomer if there is a small amount of pyrite and arsenopyrite in the ore. Therefore, before leaching the gold, it must conduct pretreatment to reach the ideal recovery rate of the gold, like roasting oxidation, pressure oxidation and biological oxidation. The fine microscopic gold has little influence on the gold recovery rate.