黄陵地块内部北西向雾渡河断裂的再研究

阐述了黄陵地块内部北西向雾渡河断裂的几何学分段、运动方式和剩余形变特征，指出晚更新世以来雾渡河断裂可能较为稳定。在暂不考虑全断层同时滑破的前提下，分段计算各段潜在地震强度为５．０≤Ｍ≤６．０。     

耀斑主相动力学模型的谱诊断

本文对一个耀斑主相动力学模型进行了谱诊断，包括同时计算ＣａＸＩＸ，Ｈα和ＣａＩＩＫ谱线轮廓演化系列．与地面光学观测及最新的Ｙｏｈｋｏｈ／ＢＣＳ观测结果比较显示，计算轮廓及其特性在实测的范围以内，从而说明该耀斑主相动力学模型在一般性反映耀斑主相演化方面的合理性，同时也意味着有相当一部分耀斑，其在主相演化过程中没有额外的加热源作用．     

Fast Calculation of Integration of Bremsstrahlung Radiation from Electrons with Power-law Distribution

Since the SSW (Solar Soft Ware) has been developed to the version 2, in comparison with the version 1 the performance of the integration calculation of the Bremsstrahlung radiation caused by high-energy electrons is improved. On the basis of the version 2 of SSW, we have made further improvement on the integration calculation. The comparison between a few schemes of Bremsstrahlung integration shows that our final scheme is faster than the version 2 for 2∼5 times. Compared with the version 1 and version 2 of SSW, the integration accuracy has been also improved a lot, even under the default control accuracy there will be no spikes appearing in photon spectra. In addition, the time consumption of integration is no longer sensitive to the upper limit of the integration. The improvement of the integration performance enables the accurate Bremsstrahlung cross-section be used to calculate the Bremsstrahlung integration. Compared with the result of approximate Bremsstrahlung cross-section, the result of accurate Bremsstrahlung cross-section gives a little smaller photon flux (≤4%), and the integration time increases about 30%.     

Selected trace metals (As,Cd and Hg) distribution and contamination in the coastal wetland sediment of the northern Beibu Gulf,South China Sea

Contamination with As, Cd and Hg, their spatial and temporal distribution are reported from the coastal wetland sediments of the northern Beibu Gulf, South China Sea. The content of As, Cd, Hg and TOC in surface sediments is 8.1 ± 5.8 μg g^?1, 0.08 ± 0.14 μg g^?1, 0.034 ± 0.028 μg g^?1 and 0.45 ± 0.39%, respectively. The mean sedimentation rates are 0.93–1.37 cm year^?1 during 1920s to 2008 determined by ²¹⁰Pb and ¹³⁷Cs dating in three cores. The vertical profiles of As, Cd and Hg content in the cores retrieved from Qin and Nanliu River estuaries show increasing trends during 1985–2008 due to anthropogenic impact caused by local economic development. Locally the surface sediments have potential ecological risk of As to benthos according to the NOAA sediment quality guidelines.     

PANDA和BERNESE软件的PPP比较分析

分析了PANDA和BERNESE软件的精密单点定位方法及解算策略上的差异。采用IGS站BJFS站2007年年积日7～13-周的观测数据,分别利用PANDA和BERNESE软件PPP模块进行解算,求得2h松弛解和单历元解,并对解算结果进行比较分析。结果显示：在解算方案相同的情况下,PANDA的解算结果与BERNESE能很好的符合,存在毫米级的差异,表明PANDA软件具有很高的稳定性及可靠性。     

Electronic chart display and information system

This paper introduces the most advanced form of electronic chart display and information systems (ECDIS) which complies with the Performance Standards for ECDIS established by the International Maritime Organization (IMO) and the International Hydrographic Organization (IHO). It also describes the key features and the important functions of ECDIS. Then the future development of ECDIS in marine is discussed.     

The Calculation of Solar Gamma-Rays by TALYS

Solar gamma-ray lines, produced from nuclear reactions of accelerated particles interacting with the solar atmospheric medium, are the most direct diagnosis for the acceleration and transportation of energetic electrons and ions in solar flares. Much information about composition, spectrum, and angular distribution of the accelerated ions, as well as the elemental abundances of the ambient solar atmosphere can be derived from solar gamma-ray line spectra. A new gamma-ray calculation program has been developed by using an efficient nuclear code − TALYS. The theory of gamma-ray production in solar flares is treated in detail. The characteristics of gamma-ray spectrum are also presented.     

湖底地下水排泄与湖泊水质演化

湖泊富营养化是当前全球范围内最为典型且严重的水环境问题之一,但过去偏重营养盐向湖泊的点源和面源输入评价,常常忽视地表水-地下水相互作用在湖泊水质形成与演化中的作用.总结了地下水-湖水相互作用模式,重点评述了地下水排泄过程对湖泊水文与水质影响的研究进展,对比了渗流仪测量、水量平衡、氡质量平衡、温度示踪、数值模拟等量化方法...     

某煤矿开采中含水层的破坏及其防治措施

在分析煤矿开发方案及其地质环境的基础上,从含水层的结构、水位和水质三个方面研究煤矿开采对含水层的破坏,并提出留设防水煤柱、污水处理和含水层监测的含水层防治措施,以保护地下水资源.