V (Ⅴ)-KIO4-甲基红体系动力学光度法测定微量钒

研究了在柠檬酸介质中,钒(Ⅴ)强烈地催化高碘酸钾氧化甲基红的褪色反应,建立了催化动力学光度法测定微量钒(Ⅴ)的方法.钒质量浓度在0.64～3.20 μg/mL范围内与log(A₀/A)呈线性关系,检出限为3.75×10^-3 μg/mL.该方法用于提钒废水中钒的测定,结果满意.     

水中微量钒的测定方法——DPC和CTMAB光度法

水中微量钒的测定方法——ＤＰＣ和ＣＴＭＡＢ光度法赵玉霞李国华（甘肃省卫生防疫站７３００００）目前用于测定水中微量钒的方法有原子吸收法，焦性没食子酸催化比色法，过氧化氢比色法。这些方法有的灵敏度低，有的操作繁琐、准确度差，易受各种因素的影响，难以满足大...     

在乳化剂OP存在下钒钼杂多酸罗丹明6G荧光淬灭法测定微量钒

在酸性溶液中，钒钼杂多酸根与罗丹明６Ｇ生成离子缔合物，使罗丹明６Ｇ荧光定量淬灭，建立了微量钒荧光分析新方法，该方法灵敏度高，选择性好，工作曲线线性范围为０～２．５μｇ／２５ｃｍ３，操作简便，用于钢样中微量钒的测定．效果较好。     

催化动力学光度法测定痕量钒

研究了在H_2SO_4介质中,微量钒能显著催化氯酸钾氧化核固红(1-氨基-2,4-二羟基蒽醌-3-磺酸钠)(C.I.No.60760)褪色。研究了反应的动力学行为,建立了测定痕量钒的催化动力学分析方法。该方法的检出限为6.9×10~(10)g/ml,线性范围为0.005～1.8μg/25ml用于测定中草药及食品中的痕量钒,结果满意。     

维多利亚兰催化光度法测定水和人发中痕量钒

本文提出一个简便高灵敏的催化光度法测定痕量钒的方法．方法基于在酸性介质中，ＶＯ３－离子催化溴酸钾氧化维多利亚兰褪色．用正交设计研究了最宜反应条件．钒在０～８ｎｇｍｌ－１范围与ｌｎ（Ａ０／Ａ）成线性关系．考察了３３种共存离子的干扰，用于测定水和人发中的钒，结果满意．     

藉催化氧化酸性间胺黄反应动力学光度法测定痕量钒

在硫酸介质中，以酒石酸为活化剂，钒对溴酸钾氧化酸性间胺黄的反应具有极强的催化作用，对催化作用的适宜条件进行了研究，并以此反应为指示反应，建立了测定痕量钒的动力学光度法新体系，测定线性范围为0～6ng／mL，检出限为0．15ng／mL．已应用于人发及粮食中痕量钒的测定．     

催化动力学光度法测定痕量钒的新体系

在酸性条件下，溴酸钾氧化铬蓝黑Ｂ的反应，钒具有极高的催化活性，以此建立了测定痕量钒的催化动力学光度法，方法的线性范围为０～２ｎｇ／ｍｌ，灵敏度为１．１１×１０－１１ｇ／ｍｌ，应用于水及人发中痕量钒的测定，结果满意．     

新指示反应测定痕量钒的研究及应用

测定痕量钒的报道已有不少．本文研究了钒的另一新指示反应．在稀Ｈ２ＳＯ４介质中，ＫＢｒＯ３氧化碱性染料孔爸绿褪色反应缓慢，有抗坏血酸存在时．痕量量钒折加入使褪色反应速度显著加快．确立了最佳反应条件，测定了表观活化能，建立了高灵敏测定痕量锐的催化光度新方法．方法检出限为２．１４×１０－１２ｇ／ｍｌ．线性范围为０—２０ｎｇ／２５ｍｌ．用于发样、水样中痕量钒的测定，结果满意．     

5—Br—PADAP树脂相分光光度法测定钢铁中的微量钒

离子交换树脂能够吸附金属有色配合物，通过测定吸附了金属有色配合物的树脂相的吸光度，可不经过分离或浓缩，直接检测样品溶液中痕量金属离子的含量。研究了５－Ｂｒ－ＰＡＤＡＰ与微量钒在Ｈ２Ｏ２的存在下，形成三元异配位化合物，经过树脂相吸附进行分光光度测定。树脂相最大吸收波长位于６４０ｎｍ；在ｐＨ０．５￣２．０的强酸介质中，钒含量在０￣５．０μｇ／２５ｍｌ范围内符合比耳定律；测定钢铁中的微量钒，方法的回收率     

催化光度法测定水中痕量钒

在柠檬酸存在下的硫酸介质中,钒（V）催化溴酸钾氧化结晶紫为指示反应,通过条件选择,建立了催化光度法测定痕量钒的新方法。在90℃恒温水中加热反应12min,测定钒的线性范围为0．4－100ng/25mL,测定下限低达0．016ng/mL。该法灵敏度高,选择性好,直接应用于环境水样中超痕量钒的测定,结果满意。     

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.     

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.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

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。     

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.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to