利用AllwaySync软件实现自动站双机数据的无缝隙同步

目前采用的双机备份方法是如果现用机发生故障,将采集器的RS232连接到备份机相应端口,然后启动备份机的地面测报业务软件,因备份机上的数据不全,系统默认将采集器上的正点数据和分钟数据全部卸载,需要很长时间,时效性差。修改备份机D:\\OSSMO2004\\SysConfig\\SysPara.ini中StartTime和RunTime参数以达迅速启动,但同样会因备份机上数据不完整而引发不可预知的错误。

     

利用Allway Sync软件实现自动站双机数据的无缝隙同步

1问题的提出 目前采用的双机备份方法是如果现用机发生故障,将采集器的RS232连接到备份机相应端口,然后启动备份机的地面测报业务软件,因备份机上的数据不全,系统默认将采集器上的正点数据和分钟数据全部卸载,需要很长时间,时效性差。修改备份机D：＼OSSMO2004＼SysConfig＼SysPara．ini中StartTime和RunTime参数以达迅速启动,但同样会因备份机上数据不完整而引发不可预知的错误。     

中国典型煤的激光显微荧光特征及R—I—VRo相关模式图的建立

利用激光显微荧光探针、ＭＰＶ－Ⅲ显微光度计等方法系统地研究了我国典型煤的激光显微荧光特征,并运用二项参数（Ｉ４００、Ｒ）与澳大利亚同期煤进行了对比,结果发现我国煤的Ｉ４００普遍比澳大利亚同期煤高,据此,建立了我国煤的Ｒ－Ｉ－ＶＲｏ相关模式图,该图对于正常评价我国烃源岩成熟度具有重要意义。     

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基于MODIS和GPS的D-InSAR大气延迟改正

利用西安地区2006年7月至2009年7月7期GPS观测数据及相应的MODIS数据,分析MODIS水汽的校正模型.运用西安地区的Envisat数据和MODIS水汽数据进行D-InSAR大气延迟改正,实验结果表明:在大气状态变化缓慢时,利用MODIS数据对D-InSAR结果有一定的改善.     

含油多孔介质二维弥散特性初步研究

为了研究含油多孔介质的二维水动力弥散特性,控制砂土中柴油和机油含油率为0、1%、2%,作为供试的含油多孔介质,采用自己设计的二维水动力弥散试验装置测定示踪剂(氯化钙)的穿透曲线,并定量确定了含油砂土的有效孔隙度、纵向弥散度、横向弥散度以及砂土中孔隙水的流速。试验结果表明,有效孔隙度随石油含量的增加而减小,而且含柴油砂土的有效孔隙度减小比含机油砂土更加显著;在纵向上,示踪剂浓度峰值的到达时间和峰值浓度的大小主要取决于孔隙水流速的大小,孔隙水流速越大,示踪剂达到浓度峰值的时间越短,且峰值浓度越大;含机油砂土的纵向弥散度小于清洁砂土,而含柴油砂土的纵向弥散度大于清洁砂土;不同含油率砂土的纵向弥散度变化范围为0.133～0.370cm,横向弥散度变化范围为9.83×10-3～4.64×10-2 cm,纵向弥散度均大于其横向弥散度。     

Air-based measurements of permeability in pebbly sands

We considered small-scale measurement of permeability in pebbly sands having coarser grains supported in a finer grained matrix (fine packing). Our central question was whether air-based measurements are representative if made with a permeameter tip seal pressed in the sand matrix. We created pebbly sands and variably sorted sands, with systematic variation in aspects of their fine packing. We made permeability measurements by inserting the tip seal of an air permeameter in the matrix of these samples and compared them to the permeability of the composite sample determined by both water-based methods and theory. The air-permeameter measurements made in this way represent the permeability of the composite mixtures of coarser and finer grains and allow for the discernment of permeability between samples with different matrix compositions, ranging from fine to coarse sand. Furthermore, the collective results show that permeability differences in the pebbly sands and variably sorted sands with fine packing, however measured, are primarily due to differences in matrix permeability and not due to differences in the size or the percentage of the coarser grains.     

Methodology for comparing source and plume remediation alternatives

It is often difficult at contaminated sites to decide whether remediation effort should be focused on the contaminant source, the dissolved plume, or on both zones. The decision process at these sites is hampered by a lack of quantitative tools for comparing remediation alternatives. A new screening-level mass balance approach is developed for simulating the transient effects of simultaneous ground water source and plume remediation. The contaminant source model is based on a power function relationship between source mass and source discharge, and it can consider partial source remediation at any time after the initial release. The source model serves as a time-dependent mass flux boundary condition to a new analytical plume model, where flow is assumed to be one dimensional, with three-dimensional dispersion. The plume model simulates first-order sequential decay and production of several species, and the decay rates and parent/daughter yield coefficients are variable functions of time and distance. This new method allows for flexible simulation of natural attenuation or remediation efforts that enhance plume degradation. The plume remediation effort may be temporary or delayed in time, limited in space, and it may have different chemical effects on different contaminant species in the decay chain.     

The overlooked role of the ocean in mercury cycling in the Arctic

The rapid and high bioaccumulation of mercury in marine mammals and its spatial and temporal variations have been a major puzzle in the Arctic. While extensive efforts have been focussed on the monitoring and chemistry of atmospheric mercury depletion events, a recent mass budget estimate of mercury in the Arctic suggests that we have overlooked the role of the ocean itself. Only through focussed studies on Hg dynamics in the Arctic Ocean under a changing climate are we going to understand what the risk of mercury is to those marine ecosystems and the people who rely on them.