测绘业面临的若干问题与思考

文章以山东省测绘技术行业为基点,对该行业的现状及存在问题进行了阐述。     

岩土层速度结构回折波探测原理与方法

岩上层波速有随深度增加的总趋势。用浅层折射法记录到的折射波均属回折波。本文采用垂向速度梯度为不同正的常数多层水平层状介质模型，推导出回析波正反演公式，有简单解析表达式，据此解释的实测剖面，与验证孔波速测井资料相当吻合。表明在岩土层保持天然结构和横向比较均匀地区，回折波探测方法有良好应用前景。     

湖南东坡野鸡尾蚀变岩枝型锡多金属矿床地质特征及成因

野鸡尾矿床为一新型锡多金属矿床。本文研究了蚀变岩枝的特征,并论证其为千里山复式岩体第二期侵入体(γ_5~(2-2))的一个高侵位岩枝。认为矿液是沿接触带上升的。文章还研究了成矿物质的来源及成矿的物理化学条件。     

福建德化——永泰巨型环状火山构造成因探析

在浙闽粤中生代火山喷发带中段的德化-永泰巨型环状火山构造,主要由晚侏罗世-白垩世火山岩和侵入岩等组成,具有幔枝构造的岩浆-变质岩系、盖层拆离滑脱上叠构造断陷-火山盆地等基本特征,其形成和海陆过渡带中的地幔柱之幔枝构造有关。     

湘鄂渝黔边旅游扶贫开发研究

文章论述了湘鄂渝黔边自然生态游、文化游等旅游开发项目;吸引贫困农民参与旅游开发、转变贫困地区人们观念和扩大就业的旅游产业带动;筹集旅游扶贫开发资金、建立旅游扶贫开发经济实体、解决发展旅游业所需人才问题;推进湘鄂渝黔边旅游产业一体化、建立旅游扶贫开发基金的政府扶持旅游业机制;转变旅游开发者观念、实施旅游收入绿色核算制度、建立旅游业可持续发展管理体制。     

Integrated colours of Milky Way globular clusters and horizontal branch morphology

Broadband colours are often used as metallicity proxies in the study of extragalactic globular clusters. A common concern is the effect of variations in horizontal branch (HB) morphology – the second‐parameter effect – on such colours. We have used UBVI, Washington, and DDO photometry for a compilation of over 80 Milky Way globular clusters to address this question. Our method is to fit linear relations between colour and [Fe/H], and study the correlations between the residuals about these fits and two quantitative measures of HB morphology. While there is a significant HB effect seen in U – B, for the commonly used colours B – V, V – I, and C – T₁, the deviations from the baseline colour‐[Fe/H] relations are less strongly related to HB morphology. There may be weak signatures in B –V and C –T₁, but these are at the limit of observational uncertainties. The results may favour the use of B –I in studies of extragalactic globular clusters, especially when its high [Fe/H]‐sensitivity is considered. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

Fast segmentation algorithms for long hydrometeorological time series

A time series with natural or artificially created inhomogeneities can be segmented into parts with different statistical characteristics. In this study, three algorithms are presented for time series segmentation; the first is based on dynamic programming and the second and the third—the latter being an improved version of the former—are based on the branch‐and‐bound approach. The algorithms divide the time series into segments using the first order statistical moment (average). Tested on real world time series of several hundred or even over a thousand terms the algorithms perform segmentation satisfactorily and fast. Copyright © 2008 John Wiley & Sons, Ltd.     

惠州抽水蓄能电站岔管结构计算分析

惠州抽水蓄能电站高压钢筋混凝土岔管,PD值超过6 000,且结构体形复杂,水文地质和工程地质条件复杂,是工程设计的重点和难点。基于透水隧洞设计理论,分别计算了岔管施工期开挖围岩地应力场,高压岔管充水运行期的稳定渗流场、混凝土衬砌的应力应变及围岩稳定,高压岔管放空检修期混凝土衬砌的应力、应变,给出了高压岔管的配筋。     

Pulsational MV versus [Fe/H] relation(s) for globular cluster RR Lyrae variables

We use the results from recent computations of updated non-linear convective pulsating models to constrain the distance modulus of Galactic globular clusters through the observed periods of first-overtone (RR _c ) pulsators. The resulting relation between the mean absolute magnitude of RR Lyrae stars 〈 M _V (RR)〉 and the heavy element content [Fe/H] appears well in the range of several previous empirical calibrations, but with a non-linear dependence on [Fe/H] so that the slope of the relation increases when moving towards larger metallicities. On this ground, our results suggest that metal-poor ([Fe/H]<−1.5) and metal-rich ([Fe/H]>−1.5) variables follow two different linear 〈 M _V (RR)〉−[Fe/H] relations. Application to RR Lyrae stars in the metal-poor globular clusters of the Large Magellanic Cloud (LMC) provides an LMC distance modulus of the order of 18.6 mag, thus supporting the 'long' distance scale. The comparison with recent predictions based on updated stellar evolution theory is briefly presented and discussed.     

冀西北水晶屯金矿地质特征及成矿作用研究

水晶屯金矿位于我国重要的金矿集中区——河北省张宣(张家口—宣化)幔枝构造区南部,是张宣地区比较有代表性的中型金矿,张宣幔枝构造演化过程中形成的一系列多期次、多阶段的褶皱和断裂构造体系对该矿的形成和演化起着重要的控制作用。该文以幔枝构造理论为指导,在总结前人资料基础上,通过野外调查,室内综合分析,认为其外围及深部仍具有较大找矿潜力。