内蒙古东部森林沼泽区1∶20万区域化探工作回顾

通过对内蒙古东部森林沼泽区开展1∶20万区域化探4个不同阶段工作方法技术及效果的回顾和总结,认为在不同时期的工作方法技术随着对森林沼泽区这一特殊景观的认识不断加深,其工作方法技术也在不断改进,发现矿点8处、矿化点17处,其中,银锌矿17处、金矿1处,取得了较好的地球化学勘查成果,所完成图幅较客观地反映了工作区区域构造、成岩成矿作用的表层地球化学面貌,大大提高了地球化学信息的可靠性和真实性。     

南方NGS200应用实践中的若干问题

对南方NGS200在工程控制测量领域应用实践中的一些问题作了阐述，提出了一些见解和措施。     

Western Pacific Jet Stream Anomalies at 200 hPa in Winter Associated with Oceanic Surface Heating and Transient Eddy Activity

The relationships between the 200-hPa westerly jet stream anomalies over the East Asian coastal water- western Pacific(WPJS),and the oceanic surface heating and synoptic-scale transient eddy(STE)activity anomalies over the North Pacific in wintertime are examined by using ERA-40 and NCEP/NCAR reanalysis data.The analysis demonstrates that the surface heating and the STE anomalies have different patterns, corresponding to the three WPJS anomalous modes,respectively.In the first WPJS anomalous mode,the WPJS main part shows no robust anomaly.The anomalous westerly wind,occurring over the mid-latitude central-eastern Pacific past the date line is associated with the anomalous heating presenting both in the tropical central-eastern Pacific past the date line and the center of the North Pacific basin.Meanwhile,the STE anomaly appears around the region of the anomalous zonal wind.The fluctuation in jet strength shown in the second WPJS mode is strongly related to the heating anomaly in the Kuroshio Current region and the STE anomaly in the jet exit region.The third mode demonstrates a northward/southward shift of the WPJS,which has a statistical connection with a south-north dipolar pattern of the heating anomaly in the western North Pacific separated at 35°N.Meanwhile,the STE spatial displacement is in conjunction with jet shifts in the same direction.The heating anomaly has a close connection with the atmospheric circulation, and thus changes the mid-latitude baroclinicity,leading to the STE anomaly,which then reinforces the WPJS anomaly via internal atmospheric dynamics.     

CIC-200型离子色谱仪常见故障解析

结合夏县中心地震台CIC-200型离子色谱仪实际观测,从仪器输液系统、分离系统、基线、管路等方面详细阐述色谱仪常见故障,逐一分析原因,并给出相应故障排除方法,为同类仪器维护提供参考,并为获得准确观测数据,延长仪器使用寿命,提出日常维护方法及建议。     

离子色谱法测定夏县温泉水中阴离子含量

利用离子色谱法对水中常见的7种阴离子进行定性和定量的分析,在既定的条件下,分别建立校正曲线法(外标法)及单点校正法模板,并对温泉水样校正分析。结果显示,外标法测得离子数据较为平稳,相对偏差均小于5%,适用于观测温泉水中其含量的变化。     

Methods and procedures to determine the outer limits of the continental shelf beyond 200 nautical miles

This paper establishes techniques and methods to determine a variety of boundaries associated with 200 nautical miles beyond the continental shelf. The methods, based on topography, slope and second-deriv- ative profile integrated analysis, are now able to identify automatically the foot of the continental slope （FOS）. By analyzing the sedimentary profile, the points of 1% sediment thickness are recognized. Through the intersection, cut, deletion and mergence calculation of the extrapolated data set of fLxed-point series, the method succeeds in generating automatically the extrapolated boundaries, including the FOS＋60 M line, the 350 M line, and the 2500 m＋100 M line. In addition, based on the automatic analysis of the topographic profile, it can be applied to determine rapidly the points of maximum water depth. Taking the northern Okinawa Trough （OT） as an example, these methods are used to calculate and examine the boundaries in- cluded in the Submission by the People＇s Republic of China Concerning the Outer Limits of the Continental Shelf beyond 200 Nautical miles in Part of the East China Sea （ECS）; the boundaries thus derived have a solid scientific and rational basis.     

ESS200电落锤性能分析

美国ESS200型电落锤是一种重复性好、便于运输和移动、可操作性强、经济实惠的绿色环保人工震源.可用于结构探测,又可用于地下介质物性变化的动态监测.在野外使用过程中,由于设计缺陷,容易发生故障,针对在使用过程中出现的一系列故障和问题,提出了针对性的分析和解决方案.并通过加装可编程逻辑控制器等处理措施,使之成为自动控制的编码震源.     

不同故障模式下的GNSS ARAIM性能评估

分析只考虑卫星故障以及同时考虑卫星故障和星座故障时,GNSS双星座、三星座以及四星座组合的ARAIM性能,通过实测数据分析地面测站在LPV-200下的ARAIM性能,并进一步仿真GNSS ARAIM在世界范围内LPV-200下的可用性。实测和仿真结果表明,ARAIM可用性由赤道向两极递减,呈对称分布;BDS作为异构星座,能够显著增加亚太地区的ARAIM可用性。相较于双星故障,单星和单星座故障同时发生时,GPS+BDS的ARAIM可用性下降幅度较大;GPS+GLONASS+BDS和GPS+GLONASS+BDS+Galileo的ARAIM可用性下降幅度较小。     

Recent 200 Years Climatic and Environmental Records From the Far East Rongbuk Ice Core, Mt. Qomolangma(Everest)

RECENT 200 YEARS CLIMATIC AND ENVIRONMENTAL RECORDS FROM THE FAR EAST RONGBUK ICE CORE, MT. QOMOLANGMA (EVEREST)     

500 hPa球函数谱异常用于我国东部汛期降水预测的尝试

用北、南半球500hPa月平均位势高度场球函数系数资料代替格点资料，用区域降水指数表示华北、江淮、华南五区汛期(6～8月)降雨。通过引进复相关系数和构造复相关系数场模．分析了半球500hPa环流与我国东部汛雨异常的同时和时滞相关联系。在此基础上．选取5月份北半球、1月份南半球球函数系数与东部汛期降水作时滞的奇异值分解。由此得到的预测关系在1998～2001年汛期降水预报试验中取得了一定效果，从而对500hPa环流的球函数系数资料在区域月、季长期天气预报中的应用作了有益的尝试。