Sorption and Desorption of Copper and Cadmium in a Contaminated Soil Affected by Soil Amendments          下载免费PDF全文

Ping Li  Man Lang  Xing‐Xiang Wang  Tao‐Lin Zhang 《洁净——土壤、空气、水》2016,44(11):1547-1556

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A modified normalized input-output minimization （Mod-NIOM） method for seismic wave propagation modeling     

Santa Man Shrestha  Hideji Kawakami  Eric Augustus Tingatinga  Hidenori Mogi 《地震工程与工程振动(英文版)》2010,9(4):481-491

A new method for wave propagation modeling is introduced in this paper. By using the constraint optimization (Lagrange multiplier) method, the sum of weighted squared Fourier amplitudes is minimized when subjected to a constraint. The sum of the maximum amplitudes obtained from all output models is normalized to unity and is taken as a constraint. In this method, all the actual time histories are considered as outputs and dealt with equally. Independently of the combinations of time histories (or the first ...  相似文献   

酒西坳陷青西凹陷富油的地质-地球化学因素分析   总被引：3，自引：0，他引：3  

杨智明  王琪  史基安  李曼茹  王雷 《沉积学报》2003,21(4):695-700

青西凹陷下白垩统暗色半深湖相-深湖相的泥岩、白云质泥岩和泥质白云岩为研究区主力烃源岩,其沉积时为整体上处于封闭-半封闭强还原-还原环境的断陷湖泊,有利于有机质的保存和转化,且烃源岩厚度占地层比例均大于 5 0%以上,加之有机质类型以混合型为主、有机碳含量普遍大于 1%,为油田形成提供了重要的物质基础。喜山期构造运动形成了许多挤压逆断层、剪切性断层和构造缝,造成地层和构造叠覆,为有机质成熟、运移和聚集提供了动力和空间,从而为该区油藏的形成提供了有利条件.  相似文献   

Spatial data mining system for ore-forming prediction   总被引：1，自引：0，他引：1  

Man WANG  Linfu XUE  Yingwei WANG 《世界地质(英文版)》2007,10(1)

The authors designed the spatial data mining system for ore-forming prediction based on the theory and methods of data mining as well as the technique of spatial database, in combination with the characteristics of geological information data. The system consists of data management, data mining and knowledge discovery, knowledge representation. It can syncretize multi-source geosciences data effectively, such as geology,geochemistry, geophysics, RS. The system digitized geological information data as data layer files which consist of the two numerical values, to store these files in the system database. According to the combination of the characters of geological information, metallogenic prognosis was realized, as an example from some area in Heilongjiang Province. The prospect area of hydrothermal copper deposit was determined.  相似文献   

城市地籍测量中GPS技术的应用研究     

赵根庄  马旭霞  满树徐  吕从 《国土资源信息化》2005,(6):26-28,15

GPS新技术的出现,可以高精度地测定地物点的坐标。特别是应用RTK新技术,依据一定数量的基准控制点,便可以高精度并快速地测定界址点及地物点的坐标。本文尝试利用GPS技术在城市地籍测量方面的应用做一些探讨。  相似文献   

会计委派制与强化会计监督     

陈文敏 《中国煤田地质》2006,(Z1)

针对地勘单位财务管理和监督的不同形式,结合河北物测队多年财务管理实际情况和经验,认为实行会计委派制是地勘单位财务管理改革的方向,提出会计委派制与强化会计监督有着密切联系,会计委派制为会计监督创造较好的会计环境,地勘单位要加强该方面的研究和应用。  相似文献   

多普勒雷达风廓线的反演及变分同化试验   总被引：6，自引：2，他引：6       下载免费PDF全文

李华宏  薛纪善王曼 杨明 《应用气象学报》2007,18(1):50-57

为了将雷达风场资料更好地应用到数值预报模式中, 使用VAD方法反演多普勒雷达风廓线并处理成标准的探空资料进行变分同化试验。结果表明: VAD方法反演的风廓线与探空实况对应较好, 验证了用VAD技术反演风廓线的可行性。用GRAPES-Meso模式的三维变分同化系统对雷达风廓线资料进行同化后, 风场的初始场明显改善, 降水强度和落区预报也有不同程度的改善。其中, 对6 h降水预报的改善明显优于对24 h的预报改善。另外, 在短时强降水预报中, 雷达风场资料的同化频率和同化窗口的不同, 对降水预报的改善情况也有所差异。在个例研究中, 同化间隔为1 h的方案6 h降水预报要优于同化间隔为3 h和6 h的方案, 同化窗口为3 h的试验方案6 h降水预报要好于同化窗口为6 h的试验方案。  相似文献   

中国西部大城市开发区企业投资决策的驱动因素——以成都、西安高新区为例     

李建新  杨永春  梁曼 《地域研究与开发》2021,40(1):50-54,66

基于成都、西安高新区企业调研数据,在构建企业投资决策驱动指标体系的基础上,采用因子分析法考察企业投资决策的驱动因素,并运用单因素方差分析和相关性检验进一步探究企业异质性与投资决策驱动因素的关系。结果表明:(1)信息通信水平、获取高素质人才、人际关系网络等构成企业投资决策的关键驱动指标,而跨国公司集聚、获取自然资源、决策者偏好等指标的解释力度最小。(2)企业投资决策由6个维度因子构成,其重要程度由高至低依次为政策、产业集群与人力资源、城市环境、城市区位、企业集聚以及关系因子。(3)入园越早、规模越大、总部型及出口型企业均更加依赖政策驱动;私企与外企、一般服务业企业与高级服务业企业、部分迁移企业与非迁移企业、办公区企业与科技园企业、办公区企业与厂区企业分别形成了基本对立的投资驱动偏好。  相似文献   

Variegated transnational partnerships: Multi-scalar actor networks in China’s overseas industrial parks     

SONG Tao  SUN Man  LIANG Yutian  Soavapa NGAMPRAMUAN  WUZHATI Yeerken  ZHOU Keyang 《地理学报(英文版)》2021,31(5):664-680

The development of overseas industrial parks is a key component of the Belt and Road Initiative and a practical way of promoting inclusive globalization by introducing new forms of cooperation between China and the host countries.In this paper,the Thai-Chinese Rayong Industrial Zone(TCRIZ),and the China-Indonesia Economic and Trade Cooperation Zone(KITIC)are discussed in the context of the evolving development strategies and tra-jectories through three interrelated conceptual lenses-policy mobility,actor networks,and partnerships.The actor-network theory provides a lens to analyze how policy mobility and partnerships develop for two industrial zone case studies.The development,which involves a multi-scalar process,is shaped by the interactions among the national states,the regional governments and corporations against a background of globalization.Three types of trans-national actor partnership networks have been identified,namely,hierarchical partnership,spontaneous partnership,and hybrid partnership.A highlight of the study is the role that the partnerships play in the process of policy mobility when it comes to the overseas industrial zones.It is argued that the partnerships are the key to achieving technology transfer on a cross-national basis,and the effectiveness of the technology transfer is dependent on partner selection and the roles of the actors in policy mobility.  相似文献   

Geothermal and other effects on amino acid racemization in selected Deep-Sea Drilling Project cores     

Barry J. Katz  Christopher G.A. Harrison  Eugene H. Man 《Organic Geochemistry》1983,5(3):151-156

Kinetic parameters for the epimerization of isoleucine in multispecific foraminiferal asemblages were used to establish the effects of burial depth and the geothermal gradient on the extent of reaction. It was observed that with a little as thirty meters of burial in a normal thermal regime there were differences between the extent of epimerization measured and that which would have been predicted for thermal equilibrium with bottom water temperatures. As would be expected, these differences are greatest when the heat flow (the geothermal gradient) and/or the sedimentation rates are highest. These effects were observed in most of the DSDP samples studied, and have been used to estimate the average heat flux since the time of sample deposition. Occasional anomalous effects were observed which could not be related to past or present heat flux. These were determined to be due to such geologic occurrences as slumping and reworking or to recent sample contamination. Other problems emerged related to bottom water temperatures including changes over geologic time which are unknown and could not be deduced. Thus, the presence of epimerization anomalies in DSDP cores as noted above limits the effectiveness of amino acid geochronology in such cores, unless these anomalies can be recognized as ab initio.  相似文献