关于改进高密度电阻率法数据采集方法的设想

运用地面点电流源电场的分布规律和高密度电阻率法的基本思想,提出了分别利用单极供电、偶极子供电,其余电极同时测量,通过室内数据整理实现高密度电阻率法的温纳对称四极、温纳偶极、温纳微分、温纳三极A、温极三极B和二极等装置.     

不同装置下点源球体的近似解与精确解对比

针对利用简单加倍的方法求解点源球体解析解的局限性,采用双球坐标系,通过镜像法求解点源下球体的精确解,将其与简单加倍求得的近似解进行对比,给出了简单加倍方法的适用条件,从而在实际中能够更准确地使用简单加倍的方法.研究结果表明:对于二极装置,当球心埋深h≤1.5r0时,利用简单加倍方法求得的近似解与精确解的误差已达到10％以上;对于中梯装置,当球心埋深h≤1.7r0时,二者的误差达到10％;二极装置的视电阻率曲线随着极距AM的增加会出现反向异常的现象,且极距越大,反向异常越明显.     

物探方法在找水工作中的应用

本次物探找水应用音频大地电位法通过在地表测量和分析某些频段组合场Ef的信号特征,区分出异常电场,达到探测低电阻异常区。低频率曲线反映深部电阻率信息,高频率曲线反映浅部电阻率信息。甚低频电磁法测量某些参数的畸变,发现地下的良导体或磁性感应体的存在。圈定矿体、岩溶发育带,地下河,含水或矿化断裂带,隐伏构造,以及进行快速电阻率填图。电阻率测深法采用不同极距的视电阻率对应于不同深度电阻率值,由各测深点的不同极距视电阻率值,绘出断面等值线图,判断低阻带的空间分布及倾向特征,结合水文地质资料,推断含水区位置。     

用边界积分方程法对地下目标体基本定位

利用边界积分方程数值模拟法研究了均匀半空间 (地下 )多个三维体条件下的地表视电阻率响应 .此外 ,在微分测深、温纳尔测深及耦极 耦极测深装置下 ,分析了三维地质体的地表视电阻率响应及异常形态与地质体几何参数的对应关系 .通过数值模拟得出了地面各类装置的测深资料特征与地下 (电性 )不均匀体几何参数的基本对应规律以及进行空间定位的方法 ,为目标体成像奠定了基础     

平凉深井观测地电阻率影响系数特征分析

利用平凉台地下水平介质电性结构,通过正演计算出影响系数,分析研究平凉深井四极对称观测装置在地层中不同深度和不同供电极距下,影响系数的变化规律,以及装置布设在何种情况下能有效的减小或消除地表对地电阻率观测的干扰,并最大限度的加强观测深部电阻率变化的能力。结果表明,平凉台在第4层即地下50~210 m的介质影响系数始终是最显著的,底层影响系数会随装置埋深的增加而增大,但增大的幅度较小;从浅层影响系数的变化中发现,极距布设的增大能有效压制地表干扰。综合考虑台站的建设和运行维护成本,平凉深井观测布设的极距分布以及观测装置的埋深是较为理想的。     

重金属污染场探测装置抗噪性能与灵敏度比较

为比较对称四极与三极电测深装置在重金属污染场探测过程中的抗噪性能与灵敏度，基于电场理论推导两探测装置信号强度关系与灵敏度方程。建立层状重金属污染场地二维模型，正演模拟视电阻率和视极化率变化规律，分别在无噪声、平均值5mV的扰动电压、5%随机噪声工况下，反演模拟两种探测装置视电阻率和视极化率误差。建立均匀大地介质和二层水平均匀介质模型，利用Comsol软件对两探测装置进行灵敏度仿真分析。研究结果表明：相同极距与隔离系数布极方式下，对称四极装置信号强度是三极装置的2倍；对称四极装置纵向灵敏度对称平行分布，纵向分辨率高，三极装置灵敏度横向包络大，横向分辨率高，且探测深度大于对称四极装置。     

矿井三维电法对封闭不良钻孔的探测

封闭不良钻孔是影响矿区安全生产的重要隐患之一,不良钻孔具有导通工作面顶板上含水层,增强顶板砂岩的富水性.针对这一问题,将直流电法电极顶入工作面顶板上,采用分站式进行数据采集工作.数据采集完成后,经过数据预处理和无穷远校正及巷道校正、剔除旁侧干扰等处理,将二维电阻率格式转换成三维电阻率格式,使用圆滑最小二乘法对数据进行反演,将反演完成后的数据导入三维可视化成图,圈定钻孔附近岩层富水区,为矿井水防治工作者提供决策.经工程验证后,说明该方法具有很强实用价值及推广价值.     

中心回线瞬变电磁法观测二次电位误差对计算全期视电阻率的影响研究

通过对均匀半空间中心回线装置瞬变电磁法核函数的研究,推导了中心回线瞬变电磁法观测二次电位误差对计算全期视电阻率的影响的表达式,发现在晚期微小的二次电位的误差将比早期对视电阻率的计算的影响更大,并介绍了目前对提高早晚期数据采集与处理质量的方法技术。     

高密度电阻率法在幕府山勘探中的应用

高密度电阻率法是把很多电极同时排列在测线上,通过对电极自动转换器的控制,实现电阻率法中各种不同装置、不同极距的自动组合,从而一次布极可测得多种装置、多种极距情况下多种视电阻率参数的方法,本文通过高密度电阻率法在南京幕府山勘察中的应用,取得了较好的勘探效果。     

聚焦电流法隧道超前预报电极布置研究

提出了两种聚焦电流电极布置方式（只用屏蔽电极探测的A-M-A1装置和在屏蔽电极中间再加一电极同时供电的A-M-A0-M1-A1装置）进行隧道超前预报探测。通过导电纸实验证明当掌子面不断接近异常体时观测电位不断下降,聚焦电流进行超前预报是可行的;A-M-A0-M1-A1装置比A-M-A1装置效果较好;超前探测距离与异常体电极距有关。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.