电致发光光源在暗室照明中的应用

根据不同的感光胶片对特种波光感光灵敏度低和电致发光单色性的特点,制作系列暗室照明光源和显示器件,具体研究方法是改变ＺｎＳ：Ｃｕ和ＺｎＳ：Ｍｎ,Ｃｕ半导体化合物的禁带宽度和杂质能级深度的方法,首先做出单色光,再用滤光片使光谱窄化,使其达到安全照明与显示的目的。     

浙江治岭头金矿床成矿地球化学特征

治岭头金矿矿体主要赋存在中元古界陈蔡群变质岩系和上侏罗统磨石山组火山岩中。成矿元素组合为Ａｕ，Ａｇ，Ｓｒ，Ｔｉ，Ｃｏ，Ｓｎ，Ｍｎ，Ｌｉ，Ｖ，Ｃｒ，Ｗ，Ｇａ，Ｍｎ，Ｎｉ，Ｃｕ，Ｐｂ，Ｚｎ，Ｂａ，Ｎｂ，Ｆｅ，Ｓ，Ｓｉ，Ｏ等。蚀变带元素地球化学异常显示Ａｕ与Ａｇ，Ｃｕ，Ｐｂ，Ｚｎ，Ｓｎ，Ｍｎ异常有较好的相关性。矿床成矿元素侧向综合分带系列为：Ａｕ，Ａｇ，Ｚｎ，Ｃｕ，Ｐｂ，Ｍｏ，Ｓｎ，Ｃｒ，Ｃｏ，Ｎｉ，Ｍｎ；成矿元素的地球化学演化为Ｓｉ，Ｆｅ￣（２＋）→Ｆｅ￣（２＋），Ｐｂ，Ｚｎ，Ｃｕ，Ａｕ，Ａｇ，Ｍｎ，Ｓｎ→Ｃａ，Ｓｉ，Ｃｒ，Ｃｏ，Ｎｉ，Ｍｎ，Ａｕ是在约２００～３００℃时，由大量的黄铁矿和金属硫化物沉淀后络合物解离而停积成矿的。     

甲醇脱氢制备甲酸甲酯的催化性能研究

将浸渍法制备的Ｃｕ／ＳｉＯ２、Ｃｕ－ＺｎＯ／ＳｉＯ２、Ｃｕ－ＺｎＯ－ＺｒＯ２／ＳｉＯ２,以及Ｃｕ／γ－Ａｌ２Ｏ３、Ｃｕ－ＺｎＯ／γ－Ａｌ２Ｏ３、Ｃｕ－ＺｎＯ－ＺｒＯ２／γ－Ａ六种催化剂应用于甲醇脱氢制甲酸甲酯反应。实验结果表明,以Ａｌ２Ｏ３为载体的催化选择性较差且易积炭失活;加有ＺｎＯ助催化剂的Ｃｕ－ＺｎＯ／ＳｉＯ２性能优于末加助催化剂的Ｃｕ／ＳｉＯ２;加有权助催化剂的Ｃｕ－Ｚｎ－ＺｒＯ２／Ｓｉ     

CuO／SiO2和CuO—ZnO／SiO2催化剂的热分析性质

用差热分析（ＴＧ／ＤＴＡ）技术研究了ＣｕＯ／ＳｉＯ２和ＣｕＯ－ＺｎＯ／ＳｉＯ２催化剂于Ｈ２气下的还原行为和在Ｏ２气下的氧化行为及对其催化性能的影响。结果表明,ＺｎＯ的加入有利于催化剂的热稳定性,并对ＣｕＯ的还原有促进作用;在有氧化气氛存在时,ＺｎＯ的加入不利于保持Ｃｕ＾０的还原态。     

交流电致发光线微区成分的研究

采用电解和热解石墨炉原子吸收光谱分析相结合的方法，定量测定了ＺｎＳ：Ｃｕ单晶中交流电致发光线的微区成分。验证了交流电致发光线是位错线被Ｃｕ缀饰的结果；位错线的结构区域是Ｃｕ发光中心的接受体。     

大厂花岗岩Sn,Cu,Zn的分配规律及成矿性评价

基于Ｎｅｒｎｅｓｔ分配定律，本文对广西大厂矿田花岗岩成岩过程中Ｓｎ，Ｃｕ，Ｚｎ的分配规律进行了分析研究，结果表明，该花岗岩主要成岩阶段Ｓｎ，Ｃｕ，Ｚｎ趋于分散，不利成矿；晚期岩浆阶段Ｚｎ，Ｃｕ有一定的成矿性，但不利形成超大型矿床。     

柱撑阴离子粘土的合成表征及催化性能研究（Ⅳ）──ZnAl－SiW_（11）和ZnAl-SiW_（11）Z的合成及稳定性研究

用离子交换法合成了杂多阴离子柱撑阴离子粘土ＺｎＡｌ-ＳｉＷ１１和ＺｎＡｌ-ＳｉＷ１１Ｚ（Ｚ＝Ｃｏ２＋，Ｎｉ２＋，Ｃｕ２＋）．ＸＲＤ和ＩＲ测定结果表明，这些层柱化合物的通道高度是１．４６×１０-７ｃｍ，层间阴离子保持它们的Ｋｅｇｇｉｎ结构．它们在空气中热分解序列为：ＺｎＡｌ-ＳｉＷ１１Ｎｉ（３４７℃）＞ＺｎＡｌ-ＳｉＷ１１Ｃｏ（３４１℃）＞ＺｎＡｌ-ＳｉＷ１１Ｃｕ（３３５℃）＞ＺｎＡｌ-ＳｉＷ１１（３２９℃）＞ＺｎＡｌ-（２９０℃），在沸腾水溶液中稳定存在的ｐＨ值范围是３．６～７．５．     

西安地区人群血清微量元素测定及相关因素

采用随机抽样的方法，应用石墨炉原子吸收光谱法测定了４３６名健康人血清中Ｚｎ，Ｆｅ，Ｃｕ，Ｍｎ，Ｐｂ，Ｃｄ，Ｃｒ，Ｎｉ，Ｍｏ和Ｓｅ等１０种微量元素；并用ＳＴ２８６型计算机进行多因素相关分析和统计处理．结果表明，血清中Ｚｎ，Ｃｕ元素分布比较集中，其它元素变异度较大；多数元素与年龄相关，其中Ｚｎ，Ｃｕ，Ｆｅ，Ｍｎ，Ｐｂ，Ｓｅ与年龄呈正相关，而Ｍｏ则与年龄呈负相关；多数微量元素含量与环境中微量元素分布相似．     

Sr4Al14O25:Eu长余辉发光的特性研究

对Ｓｒ４Ａｌ１４Ｏ２５：Ｅｕ的激光发光谱、发射光谱、长余辉发光的特性和耐光性进行系统的研究，并与传统的ＺｎＳ：Ｃｕ夜光粉进行了性能对比，结果表明：Ｓｒ４Ａｌ１４Ｏ２５：Ｅｕ是一种性能更加优良的长余辉发光材料。     

水杨醛氨基葡萄糖 Schiff 碱金属配合物抗菌活性的微量热法研究

用微量热法研究了水杨醛氨基葡萄糖席夫碱ＳＧ配体及其金属配合物和金属离子对大肠杆菌的代谢抑制．根据大肠杆菌的生长代谢热谱,计算出细菌在指数生长期的生长速率常数ｋ、传代时间Ｇ、细菌生长抑制率Ｉ和代谢热量Ｑ．结果表明：不同化合物的抗菌活性不同;ＳＧ配体和金属离子形成配合物后其抗菌活性均增强,抗菌活性强弱顺序是：ＳＧ＞Ｃｏ（Ⅲ）ＳＧ＞ＺｎＳＧ＞Ｃｕ（Ⅱ）ＳＧ和Ｚｎ２＋＞Ｃｏ２＋＞Ｃｕ２＋＞Ｎｉ２＋．     

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.     

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.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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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.     

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     

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.     

英文诗歌中的喻类修辞

为了有助于提高英文爱好者的个人情操、文化素养和学习兴趣,以及专业人员对英语学习和研究进行多途径的探索,本文通过一些精选诗歌的引证和分析,着重论述了喻类修辞法在英文诗歌中的运用其及效果。     

Man Is Unable to Change the Miserable Life——Analysis of the Arrangement of Four Characters in The Glass Menagerie

Tennessee Williams is considered as one of the most important American playwrights since World War II.The Glass Menagerie is his first successful drama,which describes a tragic situation of family and means to say that Man is unable to change the miserable life,no matter whatever means he try,This essay focuses on the analysis of the arrangement of the four main characters:Laura.Amanda,Jim and Tom to reveal the theme.Laura is fragile.Amanda is brave.Jim is vital.Tom is sensible.And all of them develop and try the different means to struggle against life,but fail tragically.With the evidence,the paper comes to conclusion naturally that Man is unable to change the miserable life,and he dooms to fail.     

Characterization of root-nodulating bacteria on Retama raetam in arid Tunisian soils

The aim of this study is to investigate the diversity of Retama raetam root-nodule bacteria isolated from arid regions of Tunisia. Twelve isolates, chosen as representative for different 16S rRNA gene patterns, were characterized by 16S rRNA gene sequencing and phenotypic analysis. Isolates were assigned to Sinorhizobium, Rhizobium and Agrobacterium. Symbiotic properties of Sinorhizobium and Rhizobium isolates showed a large diversity in their capacity to infect their host plant and fix atmospheric nitrogen. Strain RK 22 identified as Rhizobium was the most effective isolate.     

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。