基于C#编程统计地球化学异常特征参数及综合异常评序的方法

在地球化学勘查项目的资料整理中,应用C#2.0语言编制应用程序,实现批量统计圈定地球化学异常的特征参数及综合异常参数和评序,方法简便,省时、准确。首先建立包含样点坐标和元素分析数据的文本格式文件,将MapGIS软件制作的地球化学异常图及综合异常图的异常边界线转换成"SDTF格式",利用程序读取各元素异常区内的数据,统计其异常面积、平均值、衬度、规模等异常特征参数。再根据程序计算后的综合异常面积、平均衬度、规格化面金属量三个指标对其进行评序,输出统计结果值表,该方法为进一步研究地球化学异常特征提供了数据支持。     

基于AutoCAD的房产基础测绘成图软件设计与实现

房产基础测绘为城市房产管理提供最基础的地理信息数据。为满足单位开展房产基础测绘工作的需要,针对房产基础测绘的规范要求,设计实现了一套以AutoCAD为开发平台的房产基础测绘成图软件。该文重点介绍了软件开发过程中的绘图菜单设计、图形图例符号绘制及相应的绘图程序开发工作。     

快速程序升温-石墨炉原子吸收光谱法测定地质样品中痕量镉

建立了快速程序升温-石墨炉原子吸收光谱测定地质样品中痕量镉的分析方法.样品用硝酸-氢氟酸-高氯酸进行前处理,为提高分析效率,改进了石墨炉升温程序,省去了常规方法中的灰化步骤,使测定镉的程序升温时间由常规的90～100 s降至24 s,工作效率显著提高.方法检出限为0.011 μg/g,加标回收率为93.5%～106.0...     

A hybrid computational approach to formulate soil deformation moduli obtained from PLT

In this study, new empirical equations were developed to predict the soil deformation moduli utilizing a hybrid method coupling genetic programming and simulated annealing, called GP/SA. The proposed models relate secant (E_s), unloading (E_u) and reloading (E_r) moduli obtained from plate load–settlement curves to the basic soil physical properties. Several models with different combinations of the influencing parameters were developed and checked to select the best GP/SA models. The database used for developing the models was established upon a series of plate load tests (PLT) conducted on different soil types at various depths. The validity of the models was tested using parts of the test results that were not included in the analysis. The validation of the models was further verified using several statistical criteria. A traditional GP analysis was performed to benchmark the GP/SA models. The contributions of the parameters affecting E_s, E_u and E_r were analyzed through a sensitivity analysis. The proposed models are able to estimate the soil deformation moduli with an acceptable degree of accuracy. The E_s prediction model has a remarkably better performance than the models developed for predicting E_u and E_r. The simplified formulations for E_s, E_u and E_r provide significantly better results than the GP-based models and empirical models found in the literature.     

耦合长期预报的跨流域引水受水水库调度模型

为提高跨流域引水工程受水水库引水有效性,研究了耦合长期径流预报信息的跨流域引水受水水库调度模型。首先选取汛期径流预报信息,采用径流预报概率修正先验概率来描述径流的不确定性,建立了贝叶斯随机动态规划模型(BSDP-LTF)。然后将模型应用于碧流河水库,并与仅考虑径流相关的随机动态规划模型(SDP-I)、仅考虑长期预报信息的随机动态规划模型(SDP-LTF)进行比较。比较结果得出在供水保证率基本一致且不增加调度风险的情况下,BSDP-LTF模型相比SDP-I、SDP-LTF模型,可分别减少引水8.2%、4.1%。表明贝叶斯随机动态规划模型BSDP-LTF有效改进了径流描述,提高了跨流域引水的有效性。     

岷江上游土地资源适宜性评价研究

岷江上游地区的可持续发展直接影响着四川省社会经济的发展，以岷江上游土地资源适宜性评价为研究对象，利用地理信息系统（GIS）技术，建立了该地区的土地资源基础信息库；利用面向对象编程技术，应用模糊集合综合评价法及对各土地适宜性监介指标确定和适宜性等级的划分进行了岷江上游土地资源适宜性评价，并提出了土地利用规划及今后改造利用的方向。     

Dynamic programming with colour graphics smoothing for open-pit design on a personal computer

Summary Dynamic programming is a technique which has been used to design the optimum final surface mining pit limit. In using dynamic programming there is a trade-off: if the geometric constraints are specified too strictly, the pit limit will not be the optimum, but if they are specified more loosely, then the computed pit contours must be smoothed. The smoothing process has usually been manual and is time consuming. In this paper a colour graphics computer routine is presented. This not only facilitates the smoothing but also has the following benefits: open-pit limits can be designed interactively on a personal computer; pit designs that are closer to the economic optimum can be obtained; and the engineer can bring his or her own experience and intuition to bear on the final open-pit design.     

MAPGIS下重磁数据直接成图的实现及意义

作者在文中介绍了通过编制QBASIC小程序实现两种常见格式重磁数据直接生成MAPGIS图形文件的方法，为其它类似格式数据在MAPGIS下成图及建库提供可借鉴的思路和途径。     

基于灰区间真值的群体决策方法及应用

研究了灰区间偏好的群体决策问题.在专家灰区间偏好群体意见集结过程中,常规的灰区间运算会产生决策信息的失真.为了避免这一缺陷,首先引入了灰区间调节参数的概念,通过建立求解调节参数的二次规划模型,确定专家灰区间判断的真值.建立了专家客观权重求解的二次规划模型,并给出了专家客观权重的最优解.此外,从另外一个角度同时考虑调节参数与客观权重,建立求解灰区间真值与专家客观权重的群体最优决策模型.气象敏感性行业专家群体评估决策的算例表明,决策策略是有效的.