ASE文件的解析与数据格式转换

对ASE文件的信息进行解析,并定义导入ASE文件的数据结构．由于ASE文件相对比较散乱,提出一种基于翼边结构的ASE文件存储,从而得到适合用户的数据结构。     

双包层Er3+/Yb3+共掺光纤放大器ASE的动态特性

基于速率方程的离散算法,对连续和脉冲泵浦下的双包层Er3 /Yb3 共掺光纤放大器ASE动态特性进行了研究,对ASE随时间呈现不同变化的原因进行了分析。结果表明:连续光泵浦下,双包层Er3 /Yb3 共掺光纤放大器ASE达到稳态的时间和输出功率的大小依赖于泵浦功率,ASE输出功率的增加与Er3 上能级粒子数的减少相对应;脉冲光泵浦下,光纤长度对正向ASE输出功率的饱和存在显著的影响,但不影响反向ASE输出功率的饱和。     

喇曼放大器的自发辐射噪声特性分析

通过泵浦波和信号波光子数的耦合方程，分析了ASE噪声的产生，以及ASE噪声的简化模型。通过此简化模型，得出了由ASE噪声引起的噪声功率损失，进而分析了ASE噪声功率与信号的衰减及传输距离的关系。     

氟硼二吡咯类材料的放大自发发射性能

采用光泵浦的方法研究苯基取代氟硼二吡咯类材料(PhBOD)的放大自发发射(ASE)性能.结果表明:当PhBOD的甲苯溶液浓度为0.006~0.04mol/L时,其ASE阈值随浓度的增加逐渐降低;浓度为0.008 mol/L样品的ASE阈值约为99kW/cm2;当浓度为0.013mol/L时,ASE的输出效率最高,为23.1%;在相同位置经紫外脉冲激光20万次泵浦,ASE的强度约衰减为初始强度的85.4%,表明PhBOD是一种光稳定性较高的激光材料.     

加速溶剂萃取技术在食品安全检测领域中的应用

介绍加速溶剂萃取(ASE)技术的基本原理和特点,综述ASE在食品安全检测中的应用.ASE可以满足同时处理大量样品的需要,而且方法回收率较高、分析结果快速准确,同时相对标准偏差也在食品安全检测允许的范围内,在食品安全检测中具有重要的应用前景.     

ASE噪声对色散管理光孤子的影响

采用守恒量扰动法定量计算了色散管理光孤子受ASE噪声的影响而产生的中心频率漂移.结果表明,与普通光孤子相比,色散管理光孤子对ASE噪声有较好的抑制作用.     

可用于光纤Bragg地震检波解调系统的光源设计研究

将掺铒光纤超荧光光源的技术部分与解调相结合,设计出了可应用于光纤Bragg地震检波解调系统的ASE光源,光源输出光谱具有良好的线性度,使得利用ASE光源作为边缘滤波器的解调方法可以可靠的用于光纤光栅地震检波器。     

芳叔胺体系引发甲基丙烯酸甲酯在木材上的接枝共聚合反应(Ⅰ报)

含芳叔胺的引发体系:(1)N,N-二甲基苯胺～氯化苄,(2)N,N-二甲基苯胺-氯化苄～醋酸,能引发甲基丙烯酸甲酯在木材纤维索(香红木)上接枝共聚。本文研究了引发剂浓度、反应温度及反应时间对表观接枝率(G_a)和抗收缩系数(ASE)值的影响。实验证明这两个引发体系是有效的,且第三组份醋酸能明显地提高G_a及ASE值。在合适的反应条件下,G_a值可高达20%,ASE值达47%。     

快速溶剂萃取-气相色谱法测定PVC中增塑剂含量

建立了使用快速溶剂(ASE)萃取技术,带氢火焰离子检测器的气相色谱仪测定PVC中增塑剂的含量。DEHP的回收率达到95%以上;最低检出限为0.01%,结果表明使用ASE萃取PVC中增塑剂符合2005/85/EC标准的检测需要。     

基于曲面曲线的人脸构造系统的框架结构

首先介绍了一个基于曲面曲线的人脸编辑系统的框架结构,通过正侧面在3DMAX中构造人脸模型,并转化为ASE文件,解析ASE文件,导出人脸数据,构建人脸模型。基于Bezier和B样条方法对一般人脸模型进行编辑,导出个性化的人脸模型,以自定义的*.sp文件格式保存,基于*.sp文件格式构建特定人脸模型。     

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.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

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。     

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     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.