基于分块颜色直方图索引的快速图像检索方法

基于内容的图像检索是大数据处理的重要内容之一,本文从人眼视觉感知特性出发,参考局部图像相关性,提出了一种基于分块颜色直方图索引的快速图像检索方法。实验结果表明,本文方法具有较好的检索效果,缩短了检索时间,实现了快速检索。     

快速复电中心建设的探讨

本文对2011年佛山供电局某区局的快速复电的现状进行分析,并就该区局局建设新快速复电中心进行了探讨,并介绍快速复电指引中的快速复电处置、快速复电"一线一预案"和快速复电现场作业风险管控进行现场快速复电抢修进行,为提高快速复电水平确保抢修安全及缩短事故抢修提供了可行性方案,为其他地方建立快速复电中心提供了良好的参考实例。     

平面稀疏阵列天线的约束优化设计

针对有阵元数和阵列口径约束的矩形平面稀疏阵天线的综合问题,提出了一种基于整数编码的差分进化算法。该方法以每个阵元的栅格位置编号作为设计变量,使阵列的稀疏率满足约束条件,避免了优化过程中的不可行解,还减少了优化变量的个数。为了加速优化过程,采用快速傅里叶变化计算阵列的方向图。以改善阵列峰值副瓣电平为目的进行仿真试验,结果表明：优化后的稀疏天线阵峰值旁瓣电平比现有方法相比改善了1.2~1.7 dB,且具有收敛性和稳定性好的优点。     

运用新规则和快通道推进电子“新经济”

文章在深刻分析“新经济”的内涵、实质、灵魂、促成环境和起因的基础上,系统探讨了“新经济”给我们带来的机遇和挑战及新经济的“绿色通道”,重点研究了推进“新经济”发展的7条竞争法则。     

渐进还是快进?制度距离与企业国际化速度

制度环境是影响企业结构和行为的要素,制度距离对企业国际化选择至关重要。实证结果表明:随着制度距离的增加,制度环境变得更加难以识别,企业的国际化速度倾向于渐进式;从战略形成的角度来看,企业所有制性质是关键因素,随着制度距离增加,民营企业相比国有企业更倾向于加快国际化步伐;在有双边投资协定保障的情况下,随着制度距离顺差增加,国有企业相比民营企业更容易加快进入海外市场的步伐。检验结果体现出国际化阶段理论表达的特征,在考虑调节机制的情况下又符合国际创业理论蕴含的观点;研究结论有助于提高对企业行为的认识,对理解全面发展期的中国企业的"走出去"问题具有实践价值和理论意义。     

大理沙溪古镇传统白族民居空间更新改造初探

随着经济飞速发展,城市化的加剧改变着乡村居民的居住环境。他们也在不断地追求的适宜的生活环境和生活品质,这与传统民居聚落的保护产生了一系列的矛盾和冲突。本文主要针对沙溪传统民居聚落在保护和更新中,居民对新的生活空间的需求与传统空间之间的矛盾进行思考。     

快餐企业产品策略分析——以添添聚源味快餐店为例

近年来,我国的快餐业得到了空前的发展,但能真正办成功的企业并不多见。究其原因,除了经营管理的失败外,产品也是一个不可以忽视的因素。看清快餐市场的发展趋势,选择适当的人员管理策略,才有可能在激烈的市场竞争中取得成功。就此,通过添添聚源味快餐店人员管理策略的研究,寻求有效的营销策略,使顾客满意的同时,增加其企业的收益,为我国快餐业的人员管理提出建议。     

The two-stage batch ordering strategy of logistics service capacity with demand update

This paper discusses a logistics service integrator (LSI) orders logistics service capacity from a functional logistics service provider (FLSP) before the selling season with two opportunities. The optimal two-stage batch ordering strategy of LSI with demand update is studied. Standard batch size is introduced into LSI’s two-stage capacity ordering strategy model, which is built upon the decision-making sequence and actually observed demand signals between the two ordering instants. The model solution method is designed based on scenario analysis and enumerative algorithm. Sensitivity analysis of the optimal adjustment ordering time point is then carried out and a numerical analysis is presented.     

FAST SWAPTION PRICING IN GAUSSIAN TERM STRUCTURE MODELS

We propose a fast and accurate numerical method for pricing European swaptions in multifactor Gaussian term structure models. Our method can be used to accelerate the calibration of such models to the volatility surface. The pricing of an interest rate option in such a model involves evaluating a multidimensional integral of the payoff of the claim on a domain where the payoff is positive. In our method, we approximate the exercise boundary of the state space by a hyperplane tangent to the maximum probability point on the boundary and simplify the multidimensional integration into an analytical form. The maximum probability point can be determined using the gradient descent method. We demonstrate that our method is superior to previous methods by comparing the results to the price obtained by numerical integration.     

The Fast Decay Process in Outdoor Recreational Activities and the Use of Alternative Count Data Models

Despite a number of significant advances in count data modeling during the last two decades and the growing popularity of these models in recreation demand analysis, standard count data models are inadequate to address the fast decay process of the dependent variable and the associated long tail. This article demonstrates how one and two-parameter alternative count data models can be used to properly model the fast decay process and the associated long tail commonly observed in recreation demand analysis. Econometric results from an illustrative application suggest satisfactory performance of four of the eight alternative count data models proposed in this article.