基于J2EE公文处理系统的设计与实现

利用当前电子政务建设的新技术构建一个基于J2EE架构、功能完善、全面整合的政务办公平台,实现公文流转、公文传输和流程状态可视化等功能。目前中国气象局机关、各直属单位和各省（区、市）气象局都使用该平台完成FI常公文的运转,并全程实现了网上公文的起草、签批、套红、鉴印和下发,取得了良好的社会效益和经济效益。     

MATLAB software for GPS cycle-slip processing

A MATLAB software package for GPS cycle-slip processing is presented in this paper. It realizes cycle-slip detection and repair in the measurement domain for GPS L1 and L2 signals. The software implements several classic approaches oriented to real-time processing. With the graphic user interface, the user can configure the raw data, set algorithm-related parameters, add synthetic cycle-slips, and view the detection results in both text and illustrated forms. In this paper, the theoretical background of the cycle-slip processing is introduced first. After that, the advantages and limitations of each implemented approach are identified. Finally, the functionalities of the software are briefly explained.     

Understanding the Biogeochemical Process and Mechanism of Ecosystem Carbon Cycle from the Perspective of the Earth's Critical Zone

Previous research rarely considers the biogeochemistry process of the whole rock weathering layer-soil profile. The aim of Critical Zone science is re-understanding the structure and function of ecosystems from the canopy to bedrock, which emphasizes the relationship of material and energy between atmosphere and plant, between plant and soil, between soil and river in small watershed on the watershed scale. Carbon fixation and allocation are the key starting processes. Decomposition and transformation of soil carbon are the key turnover processes. Carbon migration and balance in small watershed are the key transfer processes. Further research is needed in the process, mechanism and ecology function of ecosystem carbon cycle from the canopy to bedrock based on the watershed scale. Carbon isotope technology has the function of indication, tracing and integration. Based on the ¹³C natural tracing and artificial labelling methods, we can further understand the process and mechnism of carbon biogeochemistry.     

Trace Elements in Olivines from the Giant Jinchuan Ni-Cu-(PGE) Deposit,NW China,and Its Geological Implication

The giant Jinchuan magmatic sulfide deposit in China is the third largest mining deposits in the world. Although many research have been done, there still exist some debates in the genesis of deposit. This study using the LA-IC-MS to obtain the trace elements concentrations of the olivine in order to discuss the mechanism of influence the element variability and illustrate the process of magmatism and ore-forming. The analytical results show that Ni, Co correlate negatively with Fo in the olivine, Mn/Fe is positively correlate with Fo, while Mn/Zn and Zn/Fe show no obvious correlation with Fo. The primitive mantle olivine-normalized trace element patterns of the Jinchuan olivine show that Jinchuan Ⅰ, Ⅱ intrusions have the same trace elements characteristics, which display negative Cr, V, Ni, Co and Ti anomalies and enrichment of Zr, Y, Ti, Sc and Ca. The multi-element patterns of the Jinchuan olivine imply same parental magma in the intrusion Ⅰ and Ⅱ. The spinel which cocrystallization with the olivine make it display negative Cr, V and Ti anomalies. The contents of Ni and Co in olivine are influenced by the process of sulfide segregation and the reaction between sulfide and olivine. The lower content of Cr and V in olivine of the intrusion Ⅱ compared with the intrusion Ⅰ imply that the parental magma of the intrusion Ⅱ was more evolved. Higher Mn/Zn (>13) ratios and lower Zn/Fe (<11) ratios indicate that the magma of Jinchuan intrusion likely originate from partial melting of peridotite mantle possibly, instead of pyroxene mantle sources.     

Estimation of unsaturated shear strength from soil–water characteristic curve

Acta Geotechnica - Many shallow foundations are constructed within the soil layer above the groundwater table, where the soil remains unsaturated, and the failure of shallow foundation is mostly...     

利用地震层析成像数据修正中国西北地区莫霍界面深度

考虑到地壳和上地幔密度异常对地表重力的影响,本文提出了修正单纯利用重力资料 反演地壳厚度的算法．该算法利用地震层析成像结果推算出地壳和上地幔密度异常分布,然 后计算由此分布引起的地表重力异常,再从观测布格重力异常中扣除上述密度异常引起的重 力效应,最后在地壳均衡假设的基础上顾及到对反演参考深度的修正,直接反演区域地壳厚 度．本文利用胥颐等地震层析成像的数据,修正了中国西北地区莫霍界面的深度．结果表明, 该区域地壳和上地幔密度异常引起的地表重力异常值为——60times;1O-5m／s2～30times;10-5m／s2． 与直接使用布格重力异常反演地壳厚度相比较,该密度异常对该区域莫霍界面将产生约6 km 的修正．本方法使得利用重力数据反演地壳厚度在理论上更为完备,实际应用中也比较可 行,为更进一步逼近莫霍界面的真实形态提供了一种途径．      

碳纤维布增强混凝土框架抗震性能的有限元分析

利用碳纤维布（CFS）对一个9层钢筋混凝土框架的底层柱进行了加固,运用有限元程序对加固前后结构的整体抗震性能进行了动力分析.分析结果表明,利用碳纤维布加固底部框架柱有助于提高框架的整体抗震性能,从而减少框架在地震作用下的最大侧移和各层间位移.     

浅谈地理信息系统中的空间数据模型

介绍了GIS空间数据库中几种常见的空间数据模型,并对各自的特点进行了分析和比较;对空间数据模型进行了层次划分,比较了不同层次下的空间数据模型的特点,并展望了空间数据模型的发展方向。     

温室气体吸收带重叠对CO2红外辐射效应的影响

利用精确的逐线积分模式,研究了大气主要温室气体H2O、CO2、O3、N2O和CH4吸收带重叠对红外冷却率的影响。同时,通过CO2浓度加倍的敏感性试验,详细讨论了重叠效应对CO2辐射效应的影响。结果表明：气体吸收带重叠对大气红外辐射计算具有重要的影响。在这5种大气主要的吸收气体中,N2O和CH4的重叠效应对总冷却率影响很小,在实际应用中可以忽略两者的重叠作用,采用近似方法处理其贡献。重叠效应对CO2辐射效应影响的总趋势是减弱由于其浓度增加而导致的温室效应的增强,主要贡献来自于CO2 15 μm带的两翼,以及以960 cm-1和1064 cm-1为中心的次级弱吸收区。在垂直方向上,重叠效应主要表现在减弱了地表大气的增温强度,并使对流层大气由原来的冷却作用转变为增暖作用,而对平流层大气的影响很小。此外,由于大气H2O含量的变化,重叠效应还表现出明显的季节性和纬度变率。     

热液矿床成矿作用研究新途径:数值模拟

热液矿床是最具有工业价值的矿床类型之一,传统矿床学研究在成岩成矿作用、成矿机制和成矿规律等方面已有丰硕成果,但仍存在一些尚无法有效回答的科学问题。近年来,数值模拟方法逐步应用于热液矿床的研究,已成为成矿过程定量研究的新手段。本文系统总结了近年来热液矿床成矿过程数值模拟研究的成果和进展,并对存在问题和发展趋势进行了分析和展望,以期进一步推动这一交叉学科领域的研究。