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First, from room temperature to 500oC, the shell structure is amorphous with crinkly and airtight character. The shell structure begins to change into γ-Al2O3 and α-Al2O3 at 900oC. The surface of shells shows nano-sized pores at 900oC from SEM and BET analyses. When heated to 1000oC and 1100oC, the shell forms stable α-Al2O3 structure with smooth surface. Cracks often occur at the triple grain junctions. The specific surface area and the total pore volume of the hollow spheres increase with the calcination temperature.

首先，将锻烧温度由室温提升至500℃时，球壳属非晶相皱褶状致密结构；在900℃时开始有γ-Al2O3相及些许的α-Al2O3相出现，由SEM及BET结果得知，900℃之球壳表面有许多奈米级孔洞出现；当加热至1000℃和1100℃时，球壳形成稳定相之Al2O3结构，壳层表面趋於平滑，且球壳在晶界处有微裂缝存在；由BET 结果得知，比表面积及总孔洞体积会随锻烧温度之增加，有增加之趋势。

Research usejP.Haggett"s pattern of spatial structure and system, analysis technique of tourism market space and data of spot check to analyze the evolvement of spatial structure and problems of tourism development from six faces, move, path, crunode, significance of crunode, ground and diffuse. The law of the evolvement of spatial structure: First, tourism development keeps rising. Second, AR of xi"an is very big and stable, Xi"an is tourism hotspot and center. Third, origin market space sticks out east, and isn"t continuous. Fourth, tourist proportion of XAZ follows the low of distance decay. Distance decay is very obvious in adjacent zone because of little attraction. Sixth, the spatial distribution of tourist origins has become less concentrated. Tourist origins of east China develop quickly. Three problems: First, tourism development is very unbalance between Xian and its adjacent zone.

西安及毗邻地区的国内客源市场空间结构的研究，采用了英国著名地理学家哈格特描述的空间结构模式与秩序，利用旅游市场空间分析技术，借助市场抽样调查、数量分析，从运动模式、路径、结点、结点层次、地面和扩散6个层方面进行了剖析，归纳总结出5个客源市场空间结构演变规律：(1)旅游业发展整体保持增长趋势；(2)客源吸引半径大而稳定，西安市是全国性的旅游热点城市和旅游中心城市；(3)客源市场分布突向东部，呈不连续分布；(4)游客比重的距离衰减普遍存在，毗邻地区吸引物及自然吸引物吸引力较小，距离率减明显；(5)客源集中度减小，客源市场发展呈现跳跃式增长的演变规律。3个市场拓展面临的问题：(1)西安与毗邻地区间旅游业发展不平衡现象明显；(2)客源市场区位不佳；(3)旅游产品单一老化，类型单调乏味。

This article explains the phenomenon once again from the perspective of the "cultural lag" theory about the village of Yangcheng that is writhed by Li Peilin. The article has explained the village's high-speed changes of economic structure, the rapid changes of cultural structure, the slow changes of the power structure, the mark time changes of the social relations and the impact of such changes.

本文从"文化堕距"理论的视角对李培林笔下的羊城村做再一次解读，解释城中村经济结构变迁的高速，文化变迁的快速，权力结构变迁的慢速，社会关系变迁的原地踏步及这种变迁产生的影响。

First,image structure vector field is derived from source luminance orthonormal vector sets. Andusing neighbor vectors to improve the weak gradient fields produces the structure vectorfield that is needed by LIC rendering. Then, LIC convolution step-length is adjustedaccording to local curvature in the structure vector field. LIC convolution length iscalculated according to the local statistical characteristics of the texture image. Finally, thealgorithm transfers the reference image\'s color characteristics to the rendering result tomake it full of rich color like oil paintings.

该算法通过计算源图像亮度分量的切矢量产生图像的结构矢量场，并对弱矢量区域进行邻域填充处理，获得LIC绘制所需的结构矢量场；然后，根据结构矢量场的局部曲率特征调整LIC的积分步长，并根据纹理参考图像的局部统计特征，自适应地改变LIC的积分长度；最后，将颜色传输算法引入LIC绘制结果，对绘制效果颜色进行渲染。

The basic structure of the circuit is two stage cascade, in which were a CE structure as input and a Darlington structure as output.

电路的基本结构采用两级放大结构，以共发射极结构作为输入级，以达林顿结构作为输出级。

Results In blank group, the hippocampal structure was clearly viewed, dense neurons with plenty cytoplasm and deep-dyed big nucleolus were observed. Neurons were lining up in order with clear border in CA3 region In model group, hippocampal structure was blurred. The number of neurons decreased greatly, and cells were lining up; rregularly with unclear border. In drug group, the hippocampal structure was clear with more neurons than model group. Neurons had plenty cytoplasm and deep-dyed big nucleolus. Cells were lining up in order with clear border.

结果 空白对照组：海马轮廓清晰，CA3区神经元细胞密集，胞浆丰富，核大深染，细胞间排列整齐，界限清楚；模型对照组：海马轮廓模糊，神经元细胞明显减少，细胞间排列松散，界限不清；药物组：海马轮廓清晰，神经元细胞明显多于模型对照组，神经元胞浆较丰富，核大深染，细胞间排列较整齐，界限清楚。

Using finite difference time domain method, the electromagnetic field distribution of THz wave is simulated in a THz 2D PC splitter and by plane wave expansion method the dispersion relation and defect modes are achieved in a THz rotated PC waveguide.5. A woodpile three-dimensional (3D) PC with face-centered-tetragonal symmetry is one of the most popular 3D PCs because of its favorable band gap characteristics. Based on the woodpile fct lattice structure, we propose a novel woodpile THz lattice structure with comparatively decreased symmetry, better band gap properties and easy fabrication by varying some structure parameters.

计算结果为利用非线性光学差频方法产生THz辐射源的实验研究提供了深入和全面的理论基础；四、利用平面波展开法，通过改变二维THz光子晶体的结构参数，对二维THz光子晶体完全带隙进行了优化，分析出两种适合工作在THz波段的二维光子晶体结构；采用时域有限差分法和平面波展开法，计算出THz波在二维光子晶体"T"型分束波导，45度旋转波导中传输的电磁场分布以及缺陷模；五、Woodpile面心立方四角结构是三维光子晶体中被研究最广泛的结构之一。

According to the users' requirement and visualization target of ocean information extraction, a visualization modeling system for ocean remote sensing information extraction is designed which includes its software structure, users' requirement use-case structure, class structure and flow-chart representation using the unified modeling language and object-oriented analysis method. The related flow definer and flow attemperment are designed and implemented.

根据海洋遥感信息提取可视化建模应用需求，以用户可视化模型建立及流程设计实现为目标，采用统一建模语言UML面向对象分析方法，设计海洋遥感信息提取可视化建模系统软件结构、用户需求用例结构、类结构及流程图表示法，同时完成流程定义器、流程调度的设计和实现。

The six-foot robot and gait analysis of the structure of the transmission and found that its structure and movement of a high degree of correlation and symmetry as the basis for a set of six modular structure of the robot program.

通过对六足机器人步态和传动结构的分析，发现了其运动及结构的高度相关性和对称性，并以此为基础提出了一套模块化六足机器人结构方案。

Ownership structure includes two aspects of ownership and structure denseness.Ownership and structure denseness also can influence corporate governance.

股权结构包括股权构成和股权集中度两个层次的含义，股权构成和股权集中度都会对公司治理产生影响。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？