痕量铁的在线监测研究

根据在邻菲罗啉的活化下Ｆｅ３＋对ＫＩＯ４氧化罗丹明Ｂ褪色的催化作用，利用流动注射技术，建立了一个痕量铁的在线监测的新方法．该方法Ｆｅ３＋的浓度在０～８×１０－５ｇ／Ｌ和８×１０－５～２．８×１０－４ｇ／Ｌ范围内分段与褪色效应呈良好线性相关，检出限为：１×１０－７ｇ／ＬＦｅ３＋（３δ）；ＲＳＤ≤１．６％（ｃ＝５×１０－５ｇ／Ｌ，ｎ＝１１）．利用该方法对水样中铁进行在线监测，效果满意     

1，10－菲罗啉－5，6－二醌伏安行为研究

在０．５０ｍｏｌ·Ｌ~（－１）ＮＨ_３－ＮＨ_４Ｃｌ缓冲溶液中，１，１０－菲罗啉－５，６－二醌有一还原伏安峰。当静止富集２ｍｉｎ，ｖ＝１００ｍＶ·ｓ~（－１）时，其峰电位Ｅ_ｐ＝－１．３１Ｖ（ｖｓ．Ａｇ／ＡｇＣｌ）。用线性扫描和循环伏安法等手段研究体系的伏安行为，特别是吸附性。实验表明，该体系属具有吸附性的不可逆过程。用于单扫示波极谱法测定，线性范围为５．０×１０~（－８）～５．０×１０~（－６）ｍｏｌ·Ｌ~（－１），其相关系数为０．９９９５。     

无机还原剂铁（Ⅱ）──光泽精化学发光反应的研究

采用流动注射技术，研究了由Ｊｏｎｅｓ柱产生的铁（Ⅱ）与光泽精的化学发光反应，建立了新的测定铁的化学发光分析法．方法的检出限为４×１０－１２ｇ／ｍＬ铁，相对标准偏差为２．０％（２×１０－８ｇ／ｍＬ铁，ｎ＝１１），线性范围为１×１０－１１ｇ／ｍＬ～１×１０－５ｇ／ｍＬ．该法用于一些化学试剂和镁合金中痕量铁的测定，结果令人满意．     

CTMAB存在下铬（Ⅲ）与PAR及三乙醇胺的显色反应

研究了在溴化十六烷基三甲基铵（ＣＴＭＡＢ）存在下，铬（Ⅲ）与４－（２－吡啶偶氮）－间苯二酚（ＰＡＲ）及三乙醇胺（ＴＥＡ）的显色反应。结果表明在ｐＨ６．８～７．８的三乙醇胺及其盐酸盐的缓冲体系中，经沸水浴２０ｍｉｎ，Ｃｒ（Ⅲ）－ＰＡＲ－ＴＥＡ显色完全，ＣＴＭＡＢ有较好的增敏及稳定作用；λ_（ｍａｘ）＝５４０ｎｍ，ε_（５４０）＝５．６×１０~４Ｌ·ｍｏｌ~（－１）·ｃｍ~（－１），Ｃｒ（Ⅲ）含量在０．８－８×１０~（－４）ｇ·Ｌ~（－１）范围内吸光度遵从比尔定律。     

萃取石墨炉原子吸收光谱法测定石油中As

研究了石墨炉原子吸收光谱法测定石油中Ａｓ的适宜条件。以ＭＩＢＫ为稀释剂，用Ｉ_２－甲苯－ＨＮＯ_３萃取，以Ｐｄ为基体改进剂，成功地测定了石油中的Ａｓ。方法检出限为７．５μｇ·Ｌ~（－１）（Ｋ＝３），相对标准偏差（Ｓ_ｒ）及回收率（Ｒ）分别为２．８％和９８％～１０２％，Ａｓ的线性范围是１３～２５０μｇ·Ｌ~（－１）。     

（Pb、Ca、La）TiO_3陶瓷的溶胶－凝胶制备和特性

用溶胶－凝胶工艺制备了Ｐｂ_（０．９５－ｘ）Ｃａ_（０．０５）Ｌａ_ｘＴｉ_（１－ｘ／４）Ｏ_３（Ｘ＝０．０５～０．２）系统的微粉和陶瓷，该材料密度可达理论密度值的９０％以上。研究了该陶瓷的物理和电性质，所测得热释电系数ｐ＝２．２０×１０~（－８）～３．１７×１０~（－８）Ｃ／ｃｍ~２·Ｋ，并具有负温度系数效应。讨论了对应Ｔｉ—Ｏ_Ｉ伸缩振动铁电软模和Ｏ_Ｉ－Ｔｉ－ＯＩＩ、（Ｐｂ、Ｃａ、Ｌａ）－（ＴｉＯ_３）的弯曲振动红外和远红外吸收光谱。根据陶瓷极化前后ＸＲＤ谱强度的变化，计算了该陶瓷极化后电畴在空间的择优取向分布。     

痕量铁的化学发光法测定

基于痕量Ｆｅ（３＋）离子对溶解氧在碱性介质中氧化鲁米诺的反应具有催化作用，提出一种测定药物和饮用水中铁的化学发光法。铜试剂可作为增敏剂和Ｃｕ￣（２＋）离子的掩蔽剂．Ｆｅ￣（３＋）离子的含量在１．０～１０．０ｎｇ·ｍｌ￣（－１）内与化学发光强度成正比关系。本方法简便易行，检测限为１．４×１０￣（－１０）ｇ·ｍｌ￣（－１），相对标准偏差为１．６％和２．８％，回收率为９４．０％和９６．５％。     

用原子吸收分光光度计测定分子光谱的研究——Fe（Ⅱ）－5－Br－PADAP－TritonX－100体系测定Fe

本文试验了采用原子吸收分光光度计的光路系统测量分子光谱的可行性，利用Ｆｅ（Ⅱ）－５－Ｂｒ－ＰＡＤＡＰ－ＴｒｉｔｏｎＸ－１００体系，在ＰＨ＝５．５时，于入＝６０４．４ｍ处，在原子吸收分光光度计上测定Ｆｅ的含量．对Ｆｅ测定的线性范围为１．０×１０－８ｇ／ｍｌ～６．８×１０－７ｇ／ｍｌ检测限为１．４７×１０－９ｇ／ｍｌ．将所建立的方法用于高效施尔康药物中Ｆｅ的测定，并与原子吸收分光光度法及紫外——可见分光光度法对照，结果令人满意．     

表油菜素内酯及其类似物Y－6对大豆生长的影响

本文报道用不同浓度的表油菜素内酯（ＢＲ）及其类似物Ｙ－６水溶液浸泡大豆的种子，可使大豆每棵幼苗侧根数目比对照明显增加．０．１×１０－６ｇ／ｍＬＢＲ增加８８．７６％，０．０５×１０－６ｇ／ｍＬＹ－６可增加１７６．９６％，而且对主根的生长无明显抑制作用．     

妊娠血清锌,铜,铁,钙,镁FAAS测定及围产研究

应用火焰原子吸收光谱法（ＦＡＡＳ）直接测定不同妊周孕妇及婴儿脐血血清中微量元素含量，并以标准物牛血清作方法质控，监测结果有效地用于产前干预．在最佳实验条件下，各元素的精密度（ＳＲ）．检出限（ρＤＬ／ｍｇ·Ｌ－１）和标准加入回收率（Ｙ）分别为：Ｚｎ，４．１０％，９５６×１０－３，９９．０％～１０３％；Ｃｕ，３．５０％，０．０３７，９７．０％～１０１％；Ｆｅ，４．２７％，０．０４３，９９．０％～１０３％；Ｃａ，２．２９％，０．０２０，９９．０％～１０１％；Ｍｇ，２．２９％，３．８８×１０－３，９７．０％～１０３％．该方法具有用样量少、简便准确、高精密度等特点．     

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