基于拓扑结构的图像拼接算法

针对加速稳健特征（SURF）算法匹配特征点对较多,造成拼接精度低、计算量大的缺点,结合网络拓扑学理论提出了一种剔除误匹配的SURF改进拼接算法。算法定义并采用连通矩阵得到特征点的拓扑结构,将两幅图像的连通矩阵做异或运算得到判断矩阵,多次迭代剔除特征点集合中错误匹配点和匹配度较低的点,得到拓扑结构完全相同的特征点集合,有效减少了匹配特征点对的数量,提高了特征点对的匹配正确率。根据最终的特征点集合计算变换矩阵完成两幅图像的拼接处理。对比实验结果表明,针对同一组图像进行拼接处理,所提算法的特征点匹配正确率较SURF算法提高了28.28%以上;对于小分辨率图像拼接,耗时基本保持一致;对于大分辨率图像拼接,所提算法耗时大大减少。     

Semantic cues in reference price advertisements: The moderating role of cue concreteness

Retailers use a variety of semantic cues to advertise discounts at their stores. In this paper we introduce the concept of cue concreteness and examine its impact on effectiveness of semantic cues. Four studies were conducted which concur with the findings of earlier research in this area and expand our knowledge about the effectiveness of semantic cues. Results indicate that between-store cues are perceived to be more effective than within-store cues at moderate price discount levels only when the cues are concrete in nature. In addition, a between-store cue resulted in more favorable evaluations than a within-store cue when the ad was viewed at home, but only when the cue was concrete. Implications for marketers and public policy makers are discussed.     

生产性服务外包中供需双方利益分析

本文在分析生产性服务外包中的供需双方利益点的基础上,通过比较合作双方的共同点和冲突点,阐明生产性服务外包政策或策略制定需要解决的问题。     

美国跨境资金交易监管经验借鉴研究

2018年以来,我国宣布了进一步扩大金融业对外开放的具体措施和时间表,这预 示着中国金融业新一轮对外开放推进迅速,但也对跨境资金交易监管水平提出了挑战。本文首 先对跨境资金交易及其对我国的影响进行了剖析,提出跨境资金交易对我国金融监管的六大挑 战。之后,在分析美国应对这六大挑战的经验与做法的基础上,提出加强跨境资金交易监管的 建议。     

征信领域金融消费者权益保护研究进展、问题与前瞻

近年来,征信领域金融消费者保护研究取得了很大的进展。但也存在一些问题：存在调研报告化倾向;研究方法较为单一;还没有形成理论体系等。梳理归纳征信领域金融消费者保护的研究成果,探究今后的研究方向,具有重要的意义。     

Bounding the generalized convex call price

The present article introduces the concept of generalized calls (options whose value at expiry can be any function of the difference between the price of the underlying security and the striking price) and presents some of the properties of such options through the use of absence of stochastic dominance arguments. It deals with bounding relations of call premium applied to generalized options of the convex type, i.e. nonlinear convex options. These relations are obtained from the hypothesis of absence of second-order stochastic dominance between comparable strategies and without any hypothesis on the underlying security's distribution. The article presents economic justification of this method, some classical lemmas about stochastic dominance, and some bounds for convex calls.     

Myopic loss aversion,reference point,and money illusion

We use the portfolio selection model presented in He and Zhou [Manage. Sci., 2011, 57, 315–331] and the NYSE equity and US treasury bond returns for the period 1926–1990 to revisit Benartzi and Thaler’s myopic loss aversion theory. Through an extensive empirical study, we find that in addition to the agent’s loss aversion and evaluation period, his reference point also has a significant effect on optimal asset allocation. We demonstrate that the agent’s optimal allocation to equities is consistent with market observation when he has reasonable values of degree of loss aversion, evaluation period and reference point. We also find that the optimal allocation to equities is sensitive to these parameters. We then examine the implications of money illusion for asset allocation. Finally, we extend the model to a dynamic setting.     

探究运动学问题的多种解法

在物理教学中有些问题可以从不同切入点加以探讨。这种思维方式有利于训练学生从不同的侧面或以不同的方法去考察和认识物理过程的能力,帮助学生把所学的知识融会贯通。     

胶粉聚苯颗粒保温浆料外墙外保温的施工和质量控制

文章结合工程实况,分析近年建筑中常用的胶粉聚苯颗粒保温浆料外墙外保温技术（面层为涂料）,对保温材料施工方法及质量要点作详细阐述。     

A method for generating uniformly scattered points on the <Emphasis Type="Italic">L</Emphasis><Subscript><Emphasis Type="Italic">p</Emphasis></Subscript>-norm unit sphere and its applications

Tashiro (Ann Inst Stat Math 29:295–300, 1977) studied methods for generating unform points on the surface of the regular unit sphere. The L _p -norm unit sphere is a generalization of the regular unit sphere. In this paper we propose a method associated with an algorithm for generating uniformly scattered points on the L _p -norm unit sphere and discuss its applications in statistical simulation, representative points of a wide class of multivariate probability distributions and optimization problems. Some examples are illustrated for these applications. This research was supported by The University of Hong Kong Research Grant and a University of New Haven 2005 and 2006 Summer Faculty Fellowships.