乌鲁木齐河源冰川物质平衡季节变化和总消融海拔分布

消融期前冰川积累量随海拔线性增加，消融期冰川总消融随海拔线性减少。季节零平衡线的移动和正积温密切相关。根据总消融率和冰川面积随海拔的分布，计算了冰川融水量随海拔的分布。冰川平衡线，平均消融线和平均海拔线相互接近。平衡线可作为估算冰川融水量的一个标准位置。     

Dechlorination of trichloroethylene in solution over supported nano zero valent Fe and Cu/Fe bimetal on exfoliated graphite

Degradation of organic halides by reductive dehalogenation promoted by zerovalent metals is a very active research area. The use of nano-sized particles of zero valent iron （ZVI） or bimetallic combinations of ZVI currently attracts the most attention due to their high surface areas and high reactive activity. The introduction of second catalytic metals, such as Pd, Pt, Cu, or Ni, results in an even higher dehalogenation rate. The supported zero-valent iron materials have higher activity and greater flexibility for environmental remediation applications than other forms of ZVI. Nano ZVI supported on micro-scale exfoliated graphite was prepared by using KBH4 as the reducing agent in the H2O/ethanol solution of Fe^2＋ in the laboratory. Then the ethanol solution of Cu^2＋ was added to the fleshly prepared wet supported nano ZVI. The Fe/Cu bimetallic particles supported on the graphite were obtained because of the reduction and deposition of Cu on the Fe surface. The TEM image showed that iron particles were highly dispersed on the surface of graphite. In this study, supported zero valent Cu/Fe bimetallic nanoparticles were used for the dehalogenation of trichloroethylene （TCE） in batch experiments. The dechlorination rate of supported zero valent Fe/Cu bimetallic nanoparticles was greater than the supported nano ZVI. Supported Cu/Fe bimetal with 4 wt% Cu had the fastest dehalogenation rate than that with different content of Cu. When the nana FeO dosage was 5 g/L in the dehalogention system, 8 mg/L of TCE was completely dechlorinated within 4 hours. Increasing or decreasing the FeO dosage, the dechlorination rate could be worse. When the concentration of Fe^2＋ was 0.05 mol/L during the preparation by KBH4 reduction, the nano Cu/Fe particles exhibited the spheral shape with 50-80 nm in size. When the concentration of Fe^2＋ was higher （0.2 mol/L）, the nano particles were the palpus structure and had the poor dehalogenation effect on the TCE.     

数字地震监测技术开发与应用论文(二)一种滤除零点漂移的高通数字滤波器

总结引起零点漂移的原因，给出了一种可以有效抑制零点漂移的滤波器的指标和特性，使用该滤波器后，TDE—324C地震数据采集器的动态范围得到了有效的改善。     

陀螺经纬仪定向精度分析

陀螺经纬仪的定向精度是评价其质量的重要指标之一.以GAK-1型陀螺仪为例,从其定向过程中主要的误差来源入手,理论上对陀螺经纬仪定向过程及影响测量精度予以研究与探讨,并结合赵家寨煤矿现场生产实践,实例分析了陀螺经纬仪的定向精度,提出了提高其定向精度与工作效率的意见与建议.     

土地利用更新调查方法——以大同市新荣区为例

土地利用更新调查的方法主要有计算机自动解译,人机交互解译。计算机自动解译精度现在还很差,在土地利用更新调查中基本不用此方法。人机交互解译中的利用目视解译结果在扫描矢量化的方法也很难保证精度。针对这些问题在本次土地利用更新调查利用遥感相片室内解译加外业核实、补充调查方法,也称为综合调绘方法。     

镇江市基础地理信息系统的设计与实现

基础地理信息系统在城市管理中的作用十分重要,本文主要介绍了镇江市基础地理信息系统的框架设计、功能体系,以及实现的关键技术,为建设城市基础地理信息系统提供借鉴参考.     

非等谱非线性演化方程族的零曲率表示

基于梯度序列提出了1种构造非等谱演化方程族的零曲率方程的方法,作为例子讨论了由谱参数泛函梯度产生梯度序列时的特殊情况.     

南宁市基础地理数据库的设计与建设

建设南宁市基础地理数据库是实现南宁市基础地理信息共享服务平台的基础。本文提出了建设南宁市基础地理数据库的原则、标准和目标,介绍了数据库的建设过程。重点论述了建库中的数据规范、数据转换和数据更新等几个关键环节,并探讨了在数据库更新过程中遇到的难点、相应的解决办法以及今后需要解决的主要问题。     

国家1∶50000更新数据质量特性与检验

针对国家1∶50000数据库更新工程DLG产品的质量特性与检查内容,根据行业标准规定的质量元素和质量评定方法,通过1∶50000成果数据质量评定实践,分析影响1∶10000DLG数据缩编更新1∶50000DLG数据成果质量的主要因素。     

IMU/DGPS技术在1∶50000数据更新工程中的应用

通过利用IMU/DGPS数据资料进行1∶50 000数据更新的生产,全面细致地介绍了生产作业过程,为利用IMU/DGPS数据资料进行1∶50 000 DOM生产探索出一套可行的方案。