鲜花形态建模与可视化技术研究

鲜花形态建模与可视化技术被广泛应用于计算机动画、游戏以及农学教学和科研等领域.以玫瑰花为研究对象,通过对玫瑰花形态结构的观测分析,建立了玫瑰花的三维几何模型.然后在VC + + 6.0下结合OpenGL图形库,绘制了玫瑰花的三维形态,并对其进行了着色、纹理映射、光照等处理,使建立的模型更加形象逼真,最后模拟了玫瑰花开放过程,从实验结果来看,模拟的玫瑰花开放过程具有较强的真实感.     

鲜花形态建模与可视化技术研究

鲜花形态建模与可视化技术被广泛应用于计算机动画、游戏以及农学教学和科研等领域。本文以玫瑰花为研究对象,通过对玫瑰花形态结构的观测分析,建立了玫瑰花的三维几何模型。然后在VC++ 6.0下结合OpenGL图形库,绘制了玫瑰花的三维形态,并对其进行了着色、纹理映射、光照等处理,使建立的模型更加形象逼真,最后模拟了玫瑰花开放过程,从实验结果来看,模拟的玫瑰花开放过程具有较强的真实感。     

玫瑰花中木脂素类化合物的研究

采用硅胶色谱、高效液相制备色谱对产自云南玉溪的玫瑰花中木脂素类化学成分进行了研究.分离得到了9个木脂素类化合物,通过UV、IR、MS、NMR等波谱方法进行结构鉴定,这些化合物均为首次从玫瑰花中分离得到.     

玫瑰花味美思研制

以玫瑰花卉浸提液和白酒为酒基,加入多种香料,陈酿数月配制成玫瑰花味美思,研究了玫瑰花味美思的最佳配方。通过正交试验、感官品评、理化指标测定等,研究了浸提工艺条件、稳定性和澄清处理效果等问题。结果表明:玫瑰花味美思的最佳配方是玫瑰花料水比1∶60、温度70℃、时间40min的浸提液,按糖分5%、酒精15%加入白砂糖和白酒,加入苦艾1.18g/L、肉桂0.79g/L、豆蔻0.13g/L、橙皮0.13g/L等。混合液pH值为3.5,陈酿3个月,经不同澄清剂澄清处理,得出40mg/L单宁与150mg/L蛋清配比的复合澄清剂澄清效果较好的结论。GC-MS分析结果表明,味美思香味醇和、浓郁,暴冲感大大减弱。     

玫瑰花果冻的研制

以玫瑰花为主要原料,采用微波辅助法提取玫瑰花色素,并通过正交试验对玫瑰花果冻的配方进行了优化,研制了玫瑰花果冻.结果表明,玫瑰花色素提取的条件为料液比1∶40,提取温度90℃,提取时间60 min,微波功率500 W.玫瑰花果冻的配方为白砂糖添加量10%,琼脂添加量1.8%,玫瑰汁添加量25%,柠檬酸添加量0.30%;玫瑰花果冻呈均匀淡红色,酸甜适口,香气协调,口感细腻.     

杀青温度对鄂茶10号优质绿茶品质的影响

试验研究了滚筒连续杀青机的杀青温度对鄂茶10号绿茶品质的影响.感官审评、理化性质分析结果表明,适当低温杀青能有效改善绿茶色泽,保证滋味及香气的品质;270℃杀青处理下绿茶色泽嫩绿明亮、花香高长、滋味鲜醇,感官审评得分最高;该处理下各主要品质成分含量较高,萜烯类、萜烯醇及酯类等香气物质种类丰富,综合品质最佳.     

玫瑰花红色素的提取及其稳定性研究

通过单因素和正交试验研究了玫瑰花红色素的提取工艺.结果表明:玫瑰花红色素属花青素类,提取的最佳条件为:70%(V/V)乙醇为溶剂、pH值为1、物料比(m/V)为1∶ 8、浸提温度60℃、时间为1 h.稳定性研究表明玫瑰花红色素对光和热敏感,在不同的pH值下表现出不同的颜色;金属离子Na 、Zn2 、Ca2 对该色素无明显影响,Cu2 使该色素颜色向黄色变化,而Fe3 则会使玫瑰花红色素的颜色发生较大的改变;玫瑰花红色素对还原剂Na2SO3较稳定,对氧化剂H2O2则很敏感.     

瞬态电磁脉冲对淋巴细胞遗传及免疫功能的影响

通过以人的T-淋巴细胞为受试对象,以其结合绵羊红细胞形成E-玫瑰花结的百分率为指标,测试了不同波形参数的脉冲电磁场、不同照射时间对E-玫瑰花结形成率的影响;并讨论了瞬态电磁脉冲(TEMP)对长白猪淋巴细胞转化率等遗传学效应的影响,为解释低强度瞬态电磁脉冲对细胞产生非热效应作用的机理提供了可靠的依据.     

减压处理对蓝莓果实品质影响的多变量分析

利用多变量分析方法探讨了4种减压条件对蓝莓果实品质的影响.结果表明,减压贮藏的蓝莓果实的硬度、总酸、品质、色泽、香气和风味降低,固酸比略有升高.主成分分析的结果表明,贮藏29 d时,0.050 MPa处理对蓝莓果实的风味、固酸比、硬度、总酸的影响较为显著;贮藏49 d时,0.050 MPa处理和0.075 MPa对蓝莓果实色泽、风味、固酸比、硬度、总酸、品质评价、甜度、甜酸比有较大影响.偏最小二乘回归分析得知,风味和品质与甜酸比、酸度和固酸比呈显著正相关性,与香气、硬度、坚硬度、甜度和色泽呈显著负相关.运用通径分析可知,色泽、甜酸比、酸度、固酸比、总酸、甜度对品质和风味的直接影响最强.     

稀土永磁合金对机体非特异性免疫功能影响的实验观察

为了探讨磁场对机体非特异性免疫功能的影响,本文设计了细胞免疫和体液免疫的三项试验:即磁场对小白鼠 T 淋巴细胞玫瑰花结形成率影响的试验,磁场对小白鼠腹腔巨噬细胞功能影响的试验,和测定磁场对家兔补体总量的影响.试验所得数据经统计学处理,p 均大于0.05.表明本实验所用表面磁场强度,作用时间等因素对以上三项试验没有显著影响.     

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.     

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.     

An Affordable Accurate Evaluation of the Binding Conformations Predicted by Molecular Docking Studies in Bio-System

正Recently,docking has been widely used to predict the binding-modes of protein-inhibitors,when the crystal complexes structure was absent.Most docking algorithms are able to generate a large number of probable conformations,it,however,is difficult to effectively evaluate these docking poses and identify the most reasonable bindingmode.In the present study,on the basis of the crystallographic data of human 3-hydroxy-3-methylglutaryl coenzyme     

WIMAX与WI-FI技术分析及联合组网

介绍了WiMAX与Wi-Fi两种无线宽带接入技术,并对两者之间的关系及相互之间的影响做了对比及分析,并对WiMAX的关键技术进行了详细说明,最后对两者的联合组网方式做了简单的探讨。