导游小费制初探

介绍了"小费"的产生及发展,分析了它在我国的发展情况,并论证了实施小费制给旅游者、导游和旅行社带来的利益;认为在旅游业中实施小费制是可行的,提出了在实施小费制过程中所遇到的问题及解决措施.     

对地区产业结构调整中几个问题的思考

本文首先将关系定义为一种潜在资产并提出了“企业关系需求层次论” ,然后将关系营销和传统营销进行了比较 ,最后从实践的角度对关系营销理论的运用进行了分析。     

基于双灰的多属性决策及在广告媒体代理商选择中的应用

研究决策过程中评价指标权重为区间权重和评价指标值为区间数的双灰问题集结方法。针对决策者构造决策信息的判断习惯,定义拟正态分布对区间判断信息进行拟合。根据对标准正态分布的研究,提出在一定置信度下,基于拟正态分布的假设,区间数乘法的主要信息测度公式,以此解决传统区间数乘法区间范围快速膨胀和区间重心漂移问题。以案例分析某汽车公司寻求长期合作广告媒体代理商的需求,为其选出满意的合作伙伴。     

Stock Market Returns and Consumption

This paper employs Swedish data on households' stock holdings to investigate how consumption responds to changes in stock market returns. We instrument the actual capital gains and dividend payments with past portfolio weights. Unrealized capital gains lead to a marginal propensity to consume of 23% for the bottom 50% of the wealth distribution and about 3% for the top 30% of the wealth distribution. Household consumption is significantly more responsive to dividend payouts across all parts of the wealth distribution. Our findings are consistent with households treating capital gains and dividends as separate sources of income.     

采用误差传递基函数匹配追踪的测量船误差溯源技术

针对航天测量船外弹道测控系统中影响测控精度的误差源众多、作用机理复杂、测量船现有方法难以从数据残差中自动辨识误差的难题,在给出外测数据轴系参数误差传递模型的基础上,提出了基于误差传递基函数开展匹配追踪的测量船误差溯源方法,通过误差的迭代辨识,匹配误差,定位误差,并准确估计误差值,实现测量船误差的自动识别,提高船载设备误差辨识的效率和精度。仿真分析结果证实了该方法的正确性和有效性。     

The Riskiness of Corporate Bonds

We use an index of riskiness recently proposed by Aumann and Serrano ( 2008 ) to analyze how the riskiness of diversified portfolios of corporate bonds changes across rating classes and through time and how it compares to the riskiness of other financial instruments. We find that differences in riskiness among portfolios of bonds belonging to different rating classes are seldom statistically significant. We instead find significant time variation in riskiness, driven mainly by return volatility, inflation, and average bond yields. In particular, we find that increases in average bond yields have historically tended to reduce the riskiness of portfolios of corporate bonds by increasing their expected return and by lowering the probability of portfolio losses.     

基于Syntax级分组和多线程处理的HEVC熵编码并行算法

新一代视频编码标准HEVC获得了较高的编码效率,但是同时需要较大的计算量。HEVC并行算法能够提高编码速度,如何开发适用于多核处理器的并行编码算法对于满足高清视频实时传输和大规模共享具有十分重要的意义。提出了一种基于Syntax级分组和多线程处理的HEVC熵编码并行算法。该算法首先将HEVC中一个编码树单元的编码信息按照语法元素进行分组;其次,根据编码块数据间的相关性构建Syntax级并行编码器;然后结合多线程技术实现HEVC帧级编码的并行计算。实验结果表明,在编码图像的主客观质量上没有太大损失的情况下,该并行算法框架与传统的串行算法框架相比具有65%~70%的加速效果。     

面向“十二五”时期的海洋经济地理研究

海洋经济地理研究尚处于形成发展阶段,尚未形成较为清晰的理论框架与研究脉络。基于目前相关研究成果与学科进展,对多年来海洋经济地理研究的主要领域进行梳理,系统总结海洋经济地理研究的相关进展及其国内外研究动态,并结合我国"十二五"时期的发展要求,提出未来学科研究重点。     

On the Existence of Minimax Martingale Measures

Embedding asset pricing in a utility maximization framework leads naturally to the concept of minimax martingale measures. We consider a market model where the price process is assumed to be an ^d‐semimartingale X and the set of trading strategies consists of all predictable, X‐integrable, ^d‐valued processes H for which the stochastic integral (H.X) is uniformly bounded from below. When the market is free of arbitrage, we show that a sufficient condition for the existence of the minimax measure is that the utility function u : → is concave and nondecreasing. We also show the equivalence between the no free lunch with vanishing risk condition, the existence of a separating measure, and a properly defined notion of viability.