冷轧对Fe－32Ni－5Co合金热膨胀系数的影响

冷轧对Ｆｅ－３２Ｎｉ－５Ｃｏ合金热膨胀系数的影响日本电磁材料研究所和东北特殊钢公司详细研究了冷轧对超因瓦合金Ｆｅ—３２Ｎｉ－５Ｃｏ）的热膨胀系数各向异性的影响。合金原料为纯度９９．９７％的电解铁，９９．９８％的电解镍和９９．５５％的电解钻。将这些原料...     

淀粉—KI体系光度法测定微量铜（Ⅱ）的研究

本文利用碘与淀粉的高灵敏显色反应，建立了光度法测定微量铜的新分析方法。该法简单易行，灵敏准确．Ｃｕ２＋离子浓度在１．０×１０－６～６．０×１０－５ｍｏｌ．Ｌ－１区间符合比耳定律，检测限为５×１０－７ｍｏｌ．Ｌ－１。对水样中微量铜的测定．回收率在９８．２％～９９．６％之间变化，ＲＳＤ为２．２％和２．５％。     

酸式电解法处理废蓄电池泥渣新工艺的研究

本文研究了一种从废蓄电池泥渣中湿法回收铅的新工艺，该工艺以Ｋ２ＣＯ３脱硫，以自研的复合还原剂还原，以氟硅酸作电解液电冶Ｐｂ．获得铅粉纯度达９９．９９％，电流效率＞９８％，铅直收率＞９５％，铅总回收率＞９８％，此外，工艺过程稳定，效率高，成本低，无环境污染。     

用线性电位滴定法分析维生素C片中的抗坏血酸

用线性电位滴定法分析抗坏血酸，抗坏血酸回收率为９９．８０％～１０１．５％，相对标准偏差为０．６１％；分析维生素Ｃ片中的抗坏血酸，相当标示量为９８．９０％～１００．５％，相对标准偏差不大于０．４８％，说明线性电位滴定法分析维生素Ｃ片中的抗坏血酸含量是可行的。     

Cr(Ⅵ)氧化5-溴水杨基荧光酮光度法测定微量Cr

在硫酸介质中,Ｃｒ（Ⅵ）将５－溴水杨基荧光酮（５－ＢＳＡＦ）氧化成最大吸收峰为４９４ｎｍ的有色产物,其表观摩尔吸光系数为３．６７×１０４Ｌ／（ｍｏｌ·ｃｍ）,Ｃｒ（Ⅵ）量在０～１５ｍｇ／２５Ｌ范围内服从比耳定律。用此法测定了电镀废液中微量Ｃｒ,回收率为９８．５％～１０３％,相对标准偏差为２．６％     

Sol-Gel法制备活性炭载TiO_2复合光催化剂及其光催化降解亚甲基蓝

以椰壳活性炭和煤质活性炭颗粒为载体,通过溶胶-凝胶法制备了活性炭负载二氧化钛的复合光催化剂,并对其光催化降解亚甲基蓝的活性进行评价.结果表明:复合光催化剂的光催化降解效果比纯二氧化钛好.载体的结构显著影响着复合光催化剂的活性.椰壳活性炭因其具有更丰富的孔体积和更大的比表面积,对亚甲基蓝溶液的光催化降解率明显要高于煤质活性炭负载二氧化钛复合型光催化剂.随着煅烧温度的升高,复合光催化剂的效果越来越好.     

Sol-Gel法制备活性炭载TiO_2复合光催化剂及其光催化降解亚甲基蓝

以椰壳活性炭和煤质活性炭颗粒为载体,通过溶胶-凝胶法制备了活性炭负载二氧化钛的复合光催化剂,并对其光催化降解亚甲基蓝的活性进行评价.结果表明:复合光催化剂的光催化降解效果比纯二氧化钛好.载体的结构显著影响着复合光催化剂的活性.椰壳活性炭因其具有更丰富的孔体积和更大的比表面积,对亚甲基蓝溶液的光催化降解率明显要高于煤质活性炭负载二氧化钛复合型光催化剂.随着煅烧温度的升高,复合光催化剂的效果越来越好.     

AC发泡剂新工艺研究—Ⅲ电解氧化法

用钌钛金属阳极在含有Ｃｌ—和Ｂｒ－离子的酸性溶液中进行电解氧化联二脲制备偶氮二甲酰胺，获得产品得率为９３—９８％、纯度为９９．６％、电流效率为８８－９２％。母液可循环使用，基本不产生废液．     

多元体系吸光光度法测定铝

本文研究了以铬天青Ｓ（ＣＡＳ）－溴化十六烷基吡啶（ＣＰＢ）一十二烷基硫酸钠（ＳＤＳ）－铝多元体系吸光度法测定痕量铝的方法。本方法的最大吸收波长６３４ｕｍ,表观摩尔吸光系数１．５７ｘ１０５Ｌ·ｍｏｌ－1ｃｍ－1．铝离子浓度在０－２．５ｕｇ／２５ｍＬ范围符合朗伯比尔定律,加标回收率为９７．６％－９９．５％．     

抗类风湿药物锝克湿A剂中高锝酸盐的高效液相色谱测定

利用反相高效液相色谱（ＲＰ－ＨＰＬＣ）建立了抗类风湿药物锝克湿Ａ剂中高锝酸盐（ＴｃＯ＿４）的分析鉴定和含量测定方法。将待测样品进行浓缩处理后，在Ｃ＿８反相色谱柱上进行ＨＰＬＣ分析测定，对ＴｃＯ＿４的检测极限为２．５×１０￣（－７）ｍｏｌ／Ｌ，回收率为９８％～１０２％；该法还可用于￣（９９ｍ）Ｔｃ标记药盒中￣（９９ｍ）ＴｃＯ＿４的检测。     

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