The local structure of image discontinuities in one dimension

The detailed structure of intensities in the local neighborhood of an edge can often indicate the nature of the physical event givinig rise to that edge. We argue that the limit, as we approach arbitrarily close to either side of an edge, of such image parameters as type of texture, texture gradient, color, appropriate directional derivatives of intensity, etc., is a key aspect of this structure. However, the general problem of capturing this local structure is surprisingly complex. Thus, we restrict ourselves in this paper to a relatively simple domain?one-dimensional cuts through idealized images modeled by piecewise smooth (C1) functions corrupted by Gaussian noise. Within this domain, we define local structure to be the limit of the uncorrupted intensity and of its derivatives as we approach arbitrarily close to either side of a discontinuity. We develop a technique that captures this local structure while simultaneously locating the discontinuities, and demonstrate that these tasks are in fact inseparable. The technique is an extension, using estimation theory, of the classical definition of discontinuity. It handles, in a consistent fashion, both jump discontinuities in the function and jump discontinuities in its first derivative (so-called step-edges are a special case of the former and roof-edges of the latter). It also integrates, again in a consistent fashion, information derived from a number of different neighborhood sizes.     

3-D molecular assembly of function in titania-based composite material systems

Various examples of composite titania-based nanostructured materials exhibiting cooperative functionalities between different active components are presented. The fabrication of these integrated composite materials is based on one-pot supramolecular templating techniques combined with acidic sol-gel chemistry. The defined 3-D nanoscale organization and integration of various functional components results in advanced optoelectronic and photonic applications such as visible light sensitization of mesoporous titania photocatalysts with cadmium sulfide nanocrystals acting as sensitizing integral part of the mesopore wall structure, narrow bandwidth emission from rare earth ion activated nanocrystalline mesoporous titania films, and mirrorless lasing in dye-doped hybrid organic/inorganic mesostructured titania waveguides.     

提高电力变压器抗短路能力的方法与措施

电力变压器是电力系统中关键的设备之一,阐述了电力变压器发生短路故障时产生过电流的危害性。通过对电力变压器绕组中短路电动力的分析,提出了电力变压器在设计、工艺、结构、选型和运行方面提高抗短路能力的方法与措施。     

孜然调味油的研制

利用孜然所具有的多种营养特点及其生理功能,与传统的调味油制作工艺相结合,研发出一种新型的食用调味油.其中采用正交试验设计优化孜然调味油的制作工艺参数,得出最佳的工艺条件为：60℃,孜然粉10 g,姜末7 g,蒜末5 g,辣椒末6 g,麻椒末3 g,浸制时间20 min.并在此条件下,测定了理化指标和微生物指标.     

经济语篇中多模态隐喻的构建——以《经济学人》封面漫画为例

作为认知语言学的研究新趋势,多模态隐喻不仅存在于语言中,还通过其他诸如图像、隐喻、声音和手势等沟通形式表现出来。以《经济学人》封面漫画为例,从认知语言学视角探讨多模态隐喻的构建,试图阐释不同的模态,例如图像,文字,排版,甚至颜色如何互相作用以及共同构建语篇,从而展现经济语篇中文字-图像的关系以及多模态隐喻的实现。