日照市人体舒适度指数预报

通过选取老、中少人群各50名志愿者进行人体感觉试验，获取实感资料。根据对实感资料及气象资料的统计分析，在综合考虑温湿指数和风寒指数的基础上。确定了适合于日照地区的人体舒适度等级及其指数范围。依据T106数值模式输出结果建立了人体舒适度指数MOS预报方程。试用结果及近两年的业务使用证明该方法切实可行，并取得了较好的社会效益和经济效益。     

测震学多项指标综合预测概率分析

通过对测震学各单项指标的预测效能调研，为进一步提取前兆信息，选择了7项测震学指标：频次、地震蠕变、6值、缺震、η值、GL值和调制比，进行综合概率分析。7项指标对关注地区的全时空扫描并考虑了空间单元异常与中强震地点对应的模糊关系，得到指标在各空间单元异常后发生中强震的条件概率。根据历史上每个单项指标的预报效能求计算综合概率时的指标权重，按贝叶斯定律得到相应不同指标在不同时间窗和不同空间单元时中强震发生的加权综合概率。计算结果（1970年以来）表明，对华北地区和川滇地区这一综合概率方法预测效能的R值评估超过0.5。     

居住小区容积率空间差异——以大连市为例

以土地利用中居住小区及房屋调查数据为基础、居住小区为基本研究单元,通过GIS技术和泰尔指数模型,对大连市居住小区容积率空间差异进行实证研究。先应用GIS技术对居住小区容积率进行计算,其次将居住小区容积率划分为7个等级并对居住小区进行容积率分级,应用GIS软件生成空间分布图和等值线图,然后应用泰尔指数计算居住小区容积率空间差异测度指数,最后分析其形成原因。结果表明:1大连市居住小区容积率呈不同等级整体破碎、相同等级小范围集聚、邻近等级穿插结合的空间分布特征。2大连市居住小区容积率整体分异测度指数不高,极低和极高容积率等级的居住小区差异测度最大;全市四大区域中,中山区差异测度最大,甘井子区差异测度最小,四大区域的内部差异测度远远大于各区域之间的差异测度,是大连市居住小区容积率空间差异的显著特点。3居住小区容积率空间差异的主要原因是城市不同区位和房屋属性所形成的住宅类型指向、城市空间地貌对居住小区建设的制约、城市居住用地规划标准的宏观导向、城市地价对容积率的作用。     

Evaluation of the potential risks of heavy metal contamination in rice paddy soils around an abandoned Hg mine area in Southwest China

To assess the potential ecological and health risks of trace elements(Hg,Cd,As,Mn,Sb,Pb,Cu,Ni,Cr,and Zn),a total of 138 soil samples from rice paddies were collected during the rice harvest season in the Wanshan mining area,Guizhou Province,Southwest China.Factors of the pollution load index(PLI),geo-accumulation index(I-Geo),enrichment factor(EF),and risk index(RI)were determined.High concentrations of Hg,Sb,As,Zn,Cd,Cu,and Mn were observed in the soils.The PLI,I-Geo,and EF results all showed high levels of contamination by Hg and Sb and moderate levels of contamination by As,Pb,Zn,Cu,Cd,and Mn.There was no significant contamination from Ni and Cr.The RI was very high,with Hg as the dominant pollutant,as expected,indicating that the historical large-scale Hg mining,as well as artisanal mining,has had a significant impact on the Wanshan area.Moreover,coal combustion,manganese factories,and the use of agrochemicals by the local population could also have an impact on the soil through the introduction of heavy metal loads.To address the current state of contamination,pollutant remediation and the regulation control of the anthropogenic activities in Wanshan are urgently needed.     

电离层闪烁对GNSS接收机性能影响比较分析

电离层闪烁是引起GNSS接收机性能降低甚至失锁的重要环境干扰因素。利用实测数据,比较分析了不同电离层闪烁活动强度下,不同GNSS系统（BD和GPS）接收机的定位性能。结果表明：电离层闪烁较弱时（S4〈0．3）,两种接收机均可以实现基本的定位功能;电离层闪烁较强（S4〉0.7）,且持续时间较长时,不同GNSS接收机将出现定位结果的抖动、跳变或失去定位能力;GNSS接收机应对电离层闪烁影响的能力与接收机设计相关。研究结果可作为抗闪烁接收机开发或闪烁影响分级的参考。     

PHREEQC在研究地浸溶质迁移过程中的应用

应用地球化学模式PHREEQC，揭示地浸过程中溶质迁移的存在形式及各种形式之间的转化关系。通过计算饱和指数，确定溶质水解沉淀的水文地球化学条件临界值。     

联合PROSAIL模型和植被水分指数的低矮植被含水量估算

植被冠层含水量CWC(Canopy Water Content)和植被地上部分含水量VWC(Vegetation Water Content)对于植被健康状况和土壤干旱监测具有重要意义.本文联合PROSAIL辐射传输模型和植被水分指数NDWI(Normalized Difference Water Index),发展了...     

Estimation of Axial Pile Bearing Capacity According to Shear Strength Parameters of Soil

At pesent,it is very popular to estimate pile bearing capacity by use of empirical formula andphysical indexes of soil provided in the design codes for civil construction in China.This paper attempts toapply mechanical indexes of soil and semi-empirical formulas,which are based on soil mechanical theoriesand were summarized and presented by Meyerhof in 1976,to calculate the axial pile bearing capacity.Lo-ading test results of 24 single piles in Tianjin area have been collected and compared with the proposed cal-ulation approach.     

Delineation of potential groundwater zones based on multicriteria decision making technique

Groundwater is the most prioritized water source in India and plays an indispensable role in India's economy. The groundwater potential mapping is key to the sustainable groundwater development and management. A hybrid methodology is applied to delineate potential groundwater zones based on remote sensing, geographical information systems(GIS) and analytic hierarchy process(AHP) as on multicriteria decision making. For the purpose of demonstrating field application, Chittar watershed, Tamilnadu, India is studied as an example. The important morphological characteristics considered in the study are lithology, geomorphology, lineament density, drainage density, slope, and Soil Conservation Service–Curve Number(SCS-CN). These six thematic layers are generated in a GIS platform. Based on intersecting the layers, AHP method, the values for adopting the pairwise comparison normalized weight and normalized subclasses weightage were given. The normalized subclass weightage is input into each layer subclass. Then, weighted linear combination method is used to add the data layers in GIS platform to generate groundwater potential Index(GWPI) map. The GWPI map is validated based on the net recharge computed from the differences of measured groundwater levels between the pre-monsoon and post-monsoon in the year 2018. The kappa statistics are used to measure level spatial consistency between the GWPI and net recharge map. The overall average spatial matching accuracy between the two data sets is 0.86, while the kappa coefficient for GWPI with net recharge, 0.78. The results show that in Chittar watershed about 870 km~2 area is divided into high potential zone(i.e. sum of very high and high potential zone), 667 km~2 area, as the moderate one and the rest 105 km~2 area, as the poor zone(i.e. sum of very poor and poor potential zone).     

ASTER数据的煤矿区水体信息提取

为实现多光谱数据对煤矿区水体信息提取,以萍乡市芦新岭及周边煤矿为试验区,在国内外学者对水体指数法提取水体信息和应用的启发下,对试验区不同地物的波谱特征进行分析。本文首先利用数学统计方法建立一种ASTER数据综合归一化差异水体指数模型SWI ASTER_xy,然后利用这一模型对试验区进行水体信息提取。试验表明,该模型能够有效地提取矿区各类水体,还可以运用在ASTER数据（或其他多光谱数据）对不同区域不同地物的提取,在遥感地物定量提取上具有很好的效果和潜力,具有一定的推广价值。