新型垂直筛板的研究

指出了新型垂直筛板(New VST)帽罩底隙对塔板性能的影响。并通过实验得出当(?)′=0.06时,该塔板具有低压降,高传质效率,较宽操作弹性和较大的处理能力。     

航空发动机进口帽罩结/防冰特性试验研究

航空发动机进口帽罩作为发动机重要的进口部件,防冰能力关乎发动机性能甚至影响飞行安全。为了研究航空发动机进口帽罩防冰性能,通过冰风洞对进口帽罩进行结/防冰试验,得到了进口帽罩表面结冰状况随热气流量、来流温度、来流风速的影响规律。试验结果表明：进口帽罩防冰能力从尖锥头部到帽罩后端逐渐增强;帽罩防冰能力随热气流量增加而提升;帽罩表面冰型随来流温度、来流风速变化而发生改变;帽罩表面结冰区域随风速增加而扩大。研究成果可以为进口帽罩防冰系统设计和验证提供重要指导。     

导向立体喷射复合塔板的流体力学及传质性能研究

设计了一种低压降、大通量、高传质效率的导向立体喷射复合塔板（FVJT）,在直径为800 mm的圆形塔内进行冷模实验,测得FVJT的干、湿板压降,雾沫夹带率,漏液率,清液层高度等流体力学数据,并通过富氧水解析实验分析塔板的传质性能;最后,根据干、湿板压降数据拟合得到压降关联式。对比研究了3种不同立体帽罩倾角对塔板性能的影响,结果表明：与新型垂直筛板（New VST）和F1浮阀塔板相比,本文所设计的FVJT干、湿板压降分别降低约20%~30%和10%~20%,传质效率提高了13%~17%,其中立体帽罩倾斜角为6°时传质效率最高。     

导向立体喷射复合塔板的流体力学及传质性能研究

设计了一种低压降、大通量、高传质效率的导向立体喷射复合塔板（FVJT）,在直径为800 mm的圆形塔内进行冷模实验,测得FVJT的干、湿板压降,雾沫夹带率,漏液率,清液层高度等流体力学数据,并通过富氧水解析实验分析塔板的传质性能;最后,根据干、湿板压降数据拟合得到压降关联式。对比研究了3种不同立体帽罩倾角对塔板性能的影响,结果表明：与新型垂直筛板（New VST）和F1浮阀塔板相比,本文所设计的FVJT干、湿板压降分别降低约20%~30%和10%~20%,传质效率提高了13%~17%,其中立体帽罩倾斜角为6°时传质效率最高。     

彩色涂料印花色浆罩印性能的研究

介绍了涂料印花罩印助剂的制备和应用，通过对涂料罩印浆的物理化学性能的研究，探讨了提高罩印效果的途径及罩印助剂颗粒的物理化学性质对罩印效果的影响。     

组合式角钢塔板的性能研究

在５００ｍｍ×３００ｍｍ的矩形有机玻璃实验塔中，用水－空气体系对组合式角钢塔板的流体力学性能及传质性能进行实验研究，并以筛孔塔板作对比实验。结果表明组合式角钢塔板是一种结构简单，压降低，压降低，操作弹性宽，处理能力大和板效率较高的新型塔板。     

喷砂回收实验系统设计及试验研究

针对在喷砂除锈或进行清理工作时造成的环境污染情况，设计了一种气吸式喷砂回收系统。设计了两种不同形状和不同尺寸的回收罩进行试验研究，得到了两种不同的实验结果，经过对实验结果的分析，找出了保证有效回收的方法，给出了回收罩尺寸的设计范围，为喷砂真空回收系统的设计提供了依据。     

导向梯形喷射填料式塔板的流体力学与传质性能研究

结合导向孔、填料和立体塔板的优点,设计了一种导向梯形喷射填料式塔板（FTS-PT）,在直径为500 mm的有机玻璃塔内采用空气-水-氧气物系进行冷模实验,分别测定了4种梯形角度实验塔板的流体力学性能（包括干、湿板压降,清液层高度,漏液,雾沫夹带）和传质效率。根据实验数据拟合得到FTS-PT塔板的干、湿板压降关联式。与新型垂直筛板和F1浮阀塔板相比,FTS-PT塔板压降较低。综合比较4种角度的导向梯形喷射填料式塔板的流体力学性能和传质效率,结果表明当梯形帽罩倾斜角度为8°时,塔板综合性能最好。     

电热毛细管材料消融中蒸气罩的研究

在高热流条件下电热毛细管材料的消融过程中，会形成壁面蒸气罩效应，这种等离子体壁面蒸气罩特性对消融控制电弧发生器的工作性能非常关键。该文建立了蒸气罩的理论计算模型，同时应用等离子体发生器一维瞬态模型进行计算比较。计算表明，该文所建模型及计算方法基本能正确反映毛细管材料消融中的蒸气罩效应，并得到了实验的证实。     

半自动汽车防晒罩设计说明

目前随着经济的不断发展，家用轿车的普及率越来越高，随之的汽车防晒罩类的产品也是越来越丰富。但是传统的防暗罩使用不方便，隔热效果不是特别突出。对此，我们本项作品半自动汽车防晒罩，一种将取出、存放与保险连为一体，利用磁条固定防晒革边缘，并带有可伸缩支架的汽车防晒罩。包括带有磁条的汽车防晒罩主体，防晒罩保险装置，防晒罩主支架及辅助支架。其特征是2保险装置位于汽车后备箱中，防晒罩边缘装有磁条，防晒罩撑开后有支架令防晒罩内产生一个空气隔层，增强隔热效果。其有方便快捷，存放空间小，适用范围广，防晒效果好的优点，并在一定程度上节约资源，节能环保。适用于各种车型。     

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

<正>~~     

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