基于未标定图像序列的稠密重建算法

提出一种基于未标定图像序列的稠密重建算法.算法首先利用SIFT特征点对应估计基本矩阵,同时计算图像匹配视差参考值.然后利用由基本矩阵计算得到的对极关系对图像进行平行极线修正,结合视差参考值对经过rank变换后的图像进行稠密匹配.最后自标定照相机,优化对应点的2D-3D投影关系,重建场景三维结构.实验结果表明,本算法能够对有效图像(考虑宽基线引起的大视差情况)80%以上的像素实现准确的匹配,重建出稠密的三维空间点云.     

基于风险规避顾客的收入管理在线拍卖机制

分析了可运用于收入管理的定价及分配存量的在线拍卖机制。传统拍卖机制假设竞标者是风险中性的,本文研究的模型中买方是具有相同常数绝对风险规避的效用函数（CARA）的,考虑加入现在购买期权来研究基于风险规避顾客的收益管理中最优拍卖机制问题,采用Stackleberg两阶段主从博弈模型研究参与人策略,求解竞标者策略的纳什均衡,以达到最大化易逝性产品生产企业的收益的目的,最后用一个简单的数值算例对优化模型进行验证。结果表明面对风险规避顾客时,现在购买期权能有效提高销售价格和易逝性产品卖方收益。     

壳体对云爆弹药燃料抛撒影响的仿真分析

建立了带壳体云爆弹药抛撒燃料过程的动力学仿真模型，分析了圆柱壳体的断裂准则。壳体材料采用Steinberg—Guinan本构方程，断裂准则采用Taylor断裂应力准则。应用Autodyn软件对内部爆炸载荷下不同壳体材料的液体燃料的抛撒进行了仿真，得到了最大压力值和最大速度值以及速度曲线，并对结果进行了分析。得出结论：提出的带壳体云爆弹药燃料抛撒的仿真模型和方法是可行的；壳体降低燃料的抛撒速度；合理选择内外壳体材料有利于提高燃料的抛撒速度。     

保龙高速公路桥梁景观设计初探

随着经济发展和科学技术的进步,高速公路建设迅速发展.人们在要求桥梁满足安全坚固、交通便利等物质需要的同时,对其的美学景观、文化内涵等精神功能也提出了更高的要求.结合保龙高速公路的地域特点,讨论了沿线怒江大桥及跨线桥景观的设计思路.     

Banach空间一类混合型微分积分方程的边值问题

在Ｂａｎａｃｈ空间中讨论了一类混合型微分积分方程的边值问题，利用Ｓａｄｏｖｓｋｉｉ不动点定理，证明了解的存在定理。     

AutoGDeterm: Automatic Geometry Determination for Electron Tomography

Electron Tomography(ET) is an important method for studying cell ultrastructure in three-dimensional(3 D) space. By combining cryo-electron tomography of frozen-hydrated samples(cryo-ET) and a sub-tomogram averaging approach, ET has recently reached sub-nanometer resolution, thereby realizing the capability for gaining direct insights into function and mechanism. To obtain a high-resolution 3 D ET reconstruction, alignment and geometry determination of the ET tilt series are necessary. However, typical methods for determining geometry require human intervention, which is not only subjective and easily introduces errors, but is also labor intensive for high-throughput tomographic reconstructions. To overcome these problems, we have developed an automatic geometry-determination method, called Auto GDeterm. By taking advantage of the high-contrast re-projections of the Iterative Compressed-sensing Optimized Non-Uniform Fast Fourier Transform(NUFFT) reconstruction(ICON)and a series of numerical analysis methods, Auto GDeterm achieves high-precision fully automated geometry determination. Experimental results on simulated and resin-embedded datasets show that the accuracy of Auto GDeterm is high and comparable to that of the typical "manual positioning" method. We have made Auto GDeterm available as software, which can be freely downloaded from our website http://ear.ict.ac.cn.     

Research and Application of the Mathematic Model for the Washing Shrinkage of Woven Fabric

Having analyzed the relationships between washing shrinkage and weaving technique, parameters, material properties of woven fabrics and studied the shrinkage mechanism and its mathematical model of the plain fabric,researchers set up a shrinkage model of the twills and satins and proposed a method for calculating the washing shrinkage based on weaving technique and parameters of fabrics. Shrinkage experiments of silk habotai, silk twill and silk satin fabrics were performed. The results were compared with those of the theoretical computations, and it has been proven that the theoretical method is reliable.     

基于Web Services的模型复用研究

从建模方法与建模语言、模型转换、模型描述信息定义与组织管理、模型软件复用四个方面分析模型复用的研究现状,指出目前模型复用研究的不足;结合Web Services技术,分析了基于Web Services的模型服务生成、模型服务表示、模型服务集成应用等问题;最后结合实例给出了基于Web Services的模型服务开发与集成应用过程。通过实例研究,初步验证基于Web Services技术将可以构建模型服务、并通过服务集成实现模型应用,这进一步提高了模型复用与集成能力。     

The Research on Financing Channels Innovation in Chinese Real Estate Industry

This paper is aimed at designing financing channels in Chinese real estate market. According to the information we grasped, this paper discusses the current and prospective real estate development. Meanwhile, the analysis of the financial channels in this industry and existing problems are made. Finally, this paper referred the successful experiences of some developed countries to conclude that China should cultivate advanced financial market providing as many instruments as possible to disperse current risks in real estate market.