基于VB2008的电子水准测量数据处理程序的设计与实现

本文主要介绍利用Microsoft Visual Basic 2008编写电子水准测量数据处理程序的方法,并通过对编写的电子水准测量数据处理程序的实际应用,证明该应用程序可以有效解决电子水准测量的数据传输、数据编辑、数据处理、数据整理、折线图绘制、测量等级检验等实际问题,且具有用户自定义和批处理功能,能有效地减少内业数据处理的工作量。     

数字测图野外采样方法及精度初探

根据城镇地区建筑物的特点。本文提出了两种既减少外业实测点数,又能满足计算机绘图要求和精度的野外采样方法,并以SET2全站式电子速测仪为例,分析了这种电子速测仪按极坐标法采样的精度,又据SET2电子速测仪实测的数据,统计了本文提出的两种采样方法的精度。     

Electronic and optical properties of Fe, Zn and Pb sulfides

Ab initio quantum-chemical calculations of the spatial and electronic structures of sphalerite (ZnS), pyrite (FeS₂) and galena (PbS), using the density functional theory (DFT) local density approximation (LDA) and generalized gradient approximation (GGA), the Hartree–Fock (HF) method and the hybrid functional B3LYP, have been carried out. For galena, the DFT LDA and GGA functionals provided the best estimate of the band gap, from within –0.1 eV to +0.4 eV of the measured value. B3LYP and RHF gave rise to errors of +1.3 and +5.4 eV, respectively. The unit cell parameter error varied from between –1.1% and +2.3% for all the functionals examined. For sphalerite the B3LYP functional provided the best estimate of the band gap (error +0.3 eV). The unit cell parameter error varied between –2.1% and +2.0% for the various DFT functionals and B3LYP. RHF gave rise to an error of +3.8%. For FeS₂, the DFT-GGA approach provides the best results for both the unit cell and the band gap. This may be due to mutual cancellation of the crystal field splitting and band separation force, which are of equal but opposite magnitudes. The calculated density of states (DOS) for the conduction band is used to interpret the experimental features of the S 1s XANES (X-ray absorption near-edge structure) spectra obtained using synchrotron radiation. Because of the l = ±1 selection rule for electron excitation, the S K-edge XANES spectra represent a transition of the S 1s electron to conduction band S p-like orbitals. The near-edge region, up to 15 eV past the edge is approximated well by the DOS. Individual peaks in the DOS correlate with peaks in the XANES spectra. In addition, the imaginary part of the dielectric function, which reflects the transitions from occupied to unoccupied levels, is used to model the near-edge region of the XANES, using the DFT-GGA formalism. Individual peaks in the XANES spectrum are moderately well resolved using the dielectric function, especially for ZnS and FeS₂, while the DOS for the conduction band is more successful in predicting the shape of the XANES spectra for all three minerals.     

成果地质资料电子文档的汇交与保管

通过对成果地质资料电子文档在验收、汇交、保管全过程中的载体、文档内容、文档整理、归档与保管等核心问题探讨,总结上述过程中容易出现的问题。根据近几年我局工作经验,提出了相应的解决办法及应对措施。     

Globalizing retail and the ‘new e-conomy’: The organizational challenge of e-commerce for the retail TNCs

This paper examines the organizational challenge of e-commerce for emerging retail transnational corporations (TNCs). The paper begins by scoping and conceptualizing the retail TNCs and in the process, draws attention to the high level of territorial embeddedness of these firms. This provides the framework for the remainder of the paper, where the organizational challenge of a ‘multi-channel’ paradigm (blending online and offline forms of retail distribution) is evaluated. Specifically, the paper argues that place, space and embeddedness continue to matter in the ‘new e-conomy’ of multi-channel distribution.     

湘南黄沙坪多金属矿床花岗斑岩的矿物化学及其对矽卡岩白钨矿成矿的指示意义

黄沙坪多金属矿床是湖南最大的铅锌生产基地,并且在与矿床内花岗斑岩接触的矽卡岩带产有隐伏的大型矽卡岩型白钨矿和中型规模的辉钼矿。钨-钼矿化的时代为晚侏罗世,与矿床内花岗斑岩侵入时代一致。然而,已有研究认为,由于该花岗斑岩规模很小,矽卡岩型白钨矿的成矿热液应来自深部岩浆房而非此花岗斑岩。为此,我们对花岗斑岩进行了仔细的镜下观测,并且对其中的副矿物和黑云母以及矽卡岩中的白钨矿进行了电子探针成分分析,应用原位LA-ICP-MS方法测定了矽卡岩中白钨矿的稀土元素含量,试图对白钨矿矿化的物质和流体来源提供确切的证据。通过研究,首次在矿床内花岗斑岩中发现了与未蚀变黑云母伴生的黑钨矿和铌铁矿,表明花岗斑岩至少在岩浆结晶作用晚期或岩浆-热液过渡阶段早期就已发生钨的矿物富集,为确定花岗斑岩是控制钨矿化的成矿岩体提供了依据。此外,发现花岗斑岩中的黑云母(属铁叶云母)含有极高的氟含量(3%),指示其应形成于富含氟的高分异岩浆。研究进一步揭示,矽卡岩中白钨矿的轻稀土元素配分模式与花岗斑岩十分一致,而重稀土元素则显著亏损,而且Eu的含量较花岗斑岩更为富集。这暗示形成白钨矿的成矿流体应直接来自花岗斑岩,即:在早期无水矽卡岩阶段,石榴子石的沉淀导致流体中的重稀土亏损而Eu相对富集;白钨矿随后再从这种流体中沉淀。此外,白钨矿的Eu含量与Sm、Gd含量具有负相关关系,表明Eu的分配是相对独立的行为,主要以Eu2+存在,从而指示沉淀白钨矿的流体具有还原的性质。结合前人的研究成果及本文所提供的新证据,我们认为,形成矽卡岩型白钨矿的钨和成矿热液应来自高分异且富F的花岗斑岩,而所需的钙则可能来自于碳酸盐围岩,即矿床内花岗斑岩应是形成钨钼矿床的物质来源,驱动热液活动的能量来源,和寻找隐伏钨矿床的重要找矿标志。     

Spectroscopic active IVFe3+–VIFe3+ clusters in spinel–magnesioferrite solid solution crystals: a potential monitor for ordering in oxide spinels

Optical absorption spectra (OAS) of synthetic single crystals of the solid solution spinel sensu stricto (s.s.)–magnesioferrite, Mg(Fe³⁺Al_1???y)₂O₄ (0?y?≤ 0.3), have been measured between 12 500 and 28 500?cm^?1. Chemical composition and Fe³⁺ site distribution have been measured by electron microprobe and Mössbauer spectroscopy, respectively. Ferric iron is ordered to the tetrahedral site for samples with small magnesioferrite component, and this ordering is shown to increase with magnesioferrite component. The optical absorption spectra show a strong increase in band intensities with Fe³⁺→Al substitution. Prominent and relatively sharp absorption bands are observed at 25 300 and 21 300?cm^?1, while less intense bands occur at 22 350, 18 900, 17 900 and 15 100?cm^?1. On the basis of band energies, band intensities and the compositional effect on band intensity, as well as structural considerations, we assign the observed bands to electronic transitions in ^IVFe³⁺–^VIFe³⁺clusters. A linear relationship (R ²= 0.99) between the α_net value of the absorption band at 21 300?cm^?1 and [^IVFe³⁺]?·?[^VIFe³⁺] concentration product has been defined: α_net=2.2?+?15.8 [^IVFe³⁺]?·?[^VIFe³⁺]. Some of the samples have been heat-treated between 700 and 1000?°C to investigate the relation between Fe³⁺ ordering and absorption spectra. Increase of cation disorder with temperature is observed, which corresponds to a 4% reduction in the number of active clusters. Due to the high spatial resolution (??～?10?μm), the OAS technique may be used as a microprobe for determination of Fe³⁺ concentration or site partitioning. Potential applications of the technique include analysis of small crystals and of samples showing zonation with respect to total Fe³⁺ and/or ordering.     

试论丁文江整理《徐霞客游记》的成就

丁文江是中国近现代表彰徐霞客贡献的第一人,他整理的《徐霞客游记》是近现代最具代表性的标点整理本。丁氏的传统文化教育经历、地质专业知识积累以及考察实践经历,是他成功整理该书的重要条件。丁氏整理本,在"广列众本,考证源流,精选底本"、"依据文献,考定篇目"、"重新分卷,以便检索"、"广泛参考前人成果"、"多人合作,从事标点、校对"5个方面,均有比较突出的成就。丁氏整理本,是近现代研究《徐霞客游记》成果的代表,值得学习借鉴。     

Distribution,habitat and movement of juvenile smooth hammerhead sharks (Sphyrna zygaena) in northern New Zealand

The smooth hammerhead shark, Sphyrna zygaena, occurs in warm temperate waters around the northern North Island of New Zealand. Commercial fishing records and research trawl survey data were used to determine their distribution. Highest catch rates were recorded in relatively sheltered bays and coastlines along the northeast coast of North Island. Neonate and juvenile sharks use shallow coastal waters and large harbours and estuaries as nursery areas up to an age of two years and total length of 150?cm. Five sharks were electronically tagged but two apparently died and three (137–160?cm total length) returned useful data. Two tagged sharks remained in or near the Bay of Islands for 6–55 days after tagging, moving extensively through the bay. A third shark moved about 155?km southeast in 250 days. That shark spent 70 days mostly shallower than 10?m (94% of time) with occasional dives to 40?m. Thereafter, it oscillated between the surface and depths of 60?80?m, with most time (55%) being spent at 40?60?m. Maximum recorded depth was 144?m.     

电子经纬仪用于抛物面天线检测

文中介绍了T2000电子经纬仪和PC—1500计算机联机系统的组成和功能,分析了三维角度交会的原理及精度,提出了交会法进行天线校准测量的数据处理方案,并探讨了各项误差对校准测量的影响。