水溶液中尼古丁电离常数的测定

以尼古丁－硅钨酸作活性物质,邻苯二甲酸二（２—乙基己）酯作增塑剂,Ａｇ／ＡｇＣｌ电极为内参比电极,构成ＰＶＣ 膜尼古丁选择性电极。在２０～５５ ℃范围内,电极对１．０ ｍ ｏｌ／Ｌ尼古丁溶液的响应电位随温度增加呈线性上升趋势,温度效应系数为１．０５ ｍ Ｖ／℃。当ｐＨ 为５～７ 时,电极对８．０×１０－ ５～１．０×１０－ １ ｍ ｏｌ／Ｌ 的尼古丁标准溶液具有良好的能斯特响应,工作直线斜率为５４ ｍ Ｖ／ｐＣ。通过调节试液２５ ℃时的ｐＨ 值在２．５～８．５ 范围内变化,测量１．０×１０－ ３ ｍ ｏｌ／Ｌ、１．０×１０－ ２ ｍ ｏｌ／Ｌ、１．０×１０－ １ｍ ｏｌ／Ｌ 的尼古丁标准溶液的电位,绘制ｐＨ－ｍ Ｖ 曲线并计算求得尼古丁在水溶液中的平均电离常数值。     

对溴偶氮羧－m光度法测锶

本文研究了新显色剂对溴偶氮羧－ｍ与锶的β类型显色反应，考查了介质的酸度、温度、试剂用量等对β型配合物形成的影响。在ｐＨ３．２０～３．５０时。显色剂与锶在室温下形成稳定的β型配合物。表现摩尔吸光系数ε＿（７１０）＝１．６０×１０￣５Ｌ·ｍｏＬ￣（－１）ｃｍ￣（－１），锶量在０～１４μｇ／２５ｍＬ范围内服从比耳定律，配合物组成Ｓｒ：Ｒ为１：２。     

新试剂N—壬基—N’—(氨基对苯磺酸钠)硫脲的合成及其分析性能的研究

合成了水溶性的新试剂Ｎ—壬基—Ｎ—（氨基对苯磺酸钠）硫脲（ＮＰＴ）,经元素分析、ＩＲ、ＵＶ、１ＨＮＭＲ测试,确定了其结构．实验了不同介质中,同４０多种离子的反应情况,其中只有Ａｇ＋、Ｂｉ３＋、Ｃｕ２＋、Ｈｇ２＋、Ｎｉ２＋离子有特征性反应,可作为Ｃｕ２＋、Ｎｉ２＋的新鉴定试剂．鉴定Ｃｕ２＋的检出限量ｍ＝０．０３７μｇ,最低浓度ｃ＝１μｇ／ｍｌ,４３种常见离子不干扰．鉴定Ｎｉ２＋的检出限量ｍ＝０．１２μｇ,最低浓度ｃ＝３．３μｇ／ｍｌ．灵敏度与选择性与丁二酮肟相当．测定了在弱酸、中性和弱碱性介质中同４０多种离子形成配合物的表现摩尔吸光系数,可作为分光光度法测定Ｃｕ２＋、Ｐｄ２＋的显色剂．测定Ｃｕ２＋,ε３４９．２＝４．８７×１０４Ｌｍｏｌ－１ｃｍ－１,４３种离子中,只有大量Ｆｅ３＋、Ａｌ３＋干扰．则定Ｐｄ２＋,ε２９７．８＝１．２５×１０５Ｌｍｏｌ－１ｃｍ－１,５１种离子只有Ｃｕ２＋干扰测定,用于实际样品的检测,均获满意结果．是目前测定Ｐｄ２＋的分析性能优良的试剂之一．     

偶氮染料异方酸二酰胺与氟离子的显色体系

偶氮染料异方酸二酰胺（ＢＮＢＰＳ）在ＤＭＳＯ中与氟离子（水溶液）有良好的显色作用．显色剂与ＰＨ为３．８～８．０的Ｆ－试液反应，由紫红色迅速变为蓝色（△λ＝１０２ｎｍ），λｍａｘ＝６３２ｎｍ，４ｈ内吸光度值保持不变，摩尔吸光系数ε５３２＝１．７×１０４Ｌ·ｍｏｌ－１·ｃｍ－１．Ｆ－１浓度在０～５μｇ／１０ｍＬ范围内线性关系良好大量的Ｃｌ－，ＮＯ３，Ｋ＋和Ｎａ＋存在时，对其测定无干扰Ｂｒ－，Ｉ－，Ｆｅ３＋，Ａｌ３＋和Ｂａ２＋等离子的允许共存量较大．阳离子与显色剂无显色作用．     

间溴偶氮羧—m测定微量铟的研究

本文研究了间溴偶氮羧－ｍ与铟显色反应的最佳条件．在ＨＣｌ－ＫＣｌ介质中，ｐＨ２．７～３．６范围内，铟与显色剂形成１∶２的蓝色配合物，其最大吸收波长为６８６ｎｍ，摩尔吸光系数ε６８６＝１．３８×１０５Ｌ·ｍｏｌ－１·ｃｍ－１．铟含量在０．０４～０．３２μｇ·ｍＬ－１时服从比耳定律．同时还采用了Ｐ３５０反相萃取柱色层分离法使铟与大量干扰离子分离〔１〕，建立了在水相中直接测定微量铟的简便而又迅速有效的方法．     

在混合溶剂中碳酸解离热力学研究Ⅲ碳酸钠+碳酸氢钠+氯化钠+尿素+水体系

在Ｘ＝５质量％的尿素－水混合物中，在２７８．１５－３１８．１５Ｋ温度范围内，利用电池：Ｐｔ，Ｈ２（１０１．３２５ｋＰａ）｜Ｎａ２ＣＯ３（ｍ１），ＮａＨＣＯ３（ｍ２），ＮａＣｌ（ｍ３），５质量％尿素－水｜ＡｇＣｌ－Ａｇ的准确电动势数据，确定了在５％的尿素－水混合物中碳酸二级解离常数Ｋ２．得到了Ｋ２和温度关系的经验方程ｐＫ２＝１．１７６＋１８２４．２／Ｔ＋０．００８２３Ｔ．用热力学关系推导出在５％的尿素－水混合物中碳酸二级解离过程的各个热力学量，并用溶质－溶剂相互作用的观点讨论了这些结果     

meso-四-(4-甲氧基苯基)卟啉的晶体和分子结构

用Ｘ—射线测定了ｍｅｓｏ－四（４－甲氧基苯基）卟啉的溶剂合物（ＴＰＭＰ·ＣＨＣｌ３）的晶体结构。实验表明，该晶体属单斜晶系，空间群Ｐ２１／Ｃ，ａ＝１．４３７７（２）ｎｍ，ｂ＝０．９６７４（７）ｎｍ，ｃ＝１．５６８８（４）ｎｍ，β＝１０１．００（２）°，Ｖ＝２．１４２ｎｍ３，Ｚ＝２，ｄｃ＝１．３２４ｇ／ｃｍ３，μ＝２．６１３ｃｍ－１，Ｆ（０００）＝４４４。讨论了分子结构中的非平面共轭效应及卟啉环与锰（Ⅲ）离子配位后锰（Ⅲ）对其结构参数的影响。     

LASERINDUCEDDISSOCIATIONOFKETENE（CH2CO）AT355nm：PHOTOACOUSTICSTUDIES

用光声方法观测乙烯酮分子的激光诱导离解以及研究离解碎片ＣＨ２（Ｘ３Ｂ１）的动力学。实验结果说明在３５５ｎｍ强激光辐射下，乙烯酮的非线性吸收只能诱导乙烯酮母体分子和（或）离解碎片的多光子离子化，这是造成光声信号随激光能量升高而降低的原因，再化合过程ＣＨ２（Ｘ３Ｂ１）＋ＣＨ２（Ｘ３Ｂ１）—→Ｃ２Ｈ２＋２Ｈ的速率常数是２．３９×１０－１１ｃｍ３ｍｏｌｅｃｕｌｅ－１Ｓ－１ＣＨ２（Ｘ３Ｂ１）＋ＣＨ２ＣＯ—→ＣＨ３＋ＣＨＣＯ的反应速度常数估计是１０－１２ｃｍ３ｍｏｌｅｃｕｌｅ－１Ｓ－１．     

在阴离子表面活性剂存在下3,5-diCl-DMPAP分光光度法测定微量锌

在阴离子表面活性剂ＳＬＳ存在下，研究了２－（３，５－二氯－２－吡啶偶氮）－５－二甲氨基酚（简称３，５－ｄｉＣｌ－ＤＭＰＡＰ）与锌反应的适宜显色条件．结果表明，在ｐＨ为６．０～１０．０范围内，锌（Ⅱ）与试剂形成１∶２的紫红色配合物．配合物的最大吸收波长位于５６５ｎｍ处，表观摩尔吸光系数为１．２×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，锌浓度在０～６．０μｇ／１０ｍＬ范围内遵守比尔定律．方法已用于地质化探样品和镁合金中微量锌的测定     

铁矿石中微量钴的测定

应用５—［（３,５—二氯—２—吡啶）偶氮］—２,４—二氨基甲苯作钴的显色剂测定铁矿石中的微量钴,最大吸收峰位于波长５９０ｎｍ处,摩尔吸光系数为１．２０×１０５Ｌｍｏｌ－１ｃｍ－１,钴浓度在０～３０μｇ／２５ｍｌ范围内符合比尔定律。矿样对比分析结果满意。     

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.     

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.     

A computer generator for randomly layered structures

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

Perspherical Approaches for Electrons in Atoms and Charged Excitons in Quantum Wells

Instead of following Fock’s expansion,we solve the Schrodinger equation for some quantum mechanical manybody systems such as electrons in atoms and charged excitons in quantum wells in a similar way in hyperspherical coordinates by expanding the wave functions into orthonormal complete basis sets of the hyperspherical hannonics(HHs)of hyperangles and generalized Laguerre polynomials(GLPs)of the hyperradius.This leads the equation to     

Advances in broadband wireless communications under high-mobility scenarios

Future mobile communication systems aim at providing very high data transmission rates, even in high-mobility scenarios such as high-speed wheel-track trains, maglev trains, highway vehicles, airplanes, guided missiles or spacecraft. A particularly important commercial application is the strong and increasing worldwide demand for high- speed broadband wireless communications （up to 574.8 km/ h test speeds or 380 km/h commercial speeds） in railways, providing data, voice and video services for applications such as onboard entertainment services to passengers, train control, train dispatch, train sensor status handling and sur- veillance. In such high-mobility scenarios, there are a number of communication challenges, including fast hand- over, location updating, high-speed channel modeling, estimation and equalization, anti-Doppler spreading tech- niques, fast power control, and dedicated network architec- ture. Because signal transmission in very high-speed scenarios will inevitably experience serious deterioration, it is imperative to develop key broadband mobile communi- cation techniques for such high-speed vehicles.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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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。     

Scale-based spatial data model for GIS

Being the primary media of geographical information and the elementary objects manipulated, almost all of maps adopt the layer-based model to represent geographic information in the existent GIS. However, it is difficult to extend the map represented in layer-based model. Furthermore, in Web-Based GIS, It is slow to transmit the spatial data for map viewing. In this paper, for solving the questions above, we have proposed a new method for representing the spatial data. That is scale-based model. In this model we represent maps in three levels: scale-view, block, and spatial object, and organize the maps in a set of map layers, named Scale-View, which associates some given scales.Lastly, a prototype Web-Based GIS using the proposed spatial data representation is described briefly.     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

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