A measure of regional influence with the analytic network process

The metropolitan region is commonly defined by a socio-spatial network of urban nodes that are linked in territory and function. Such a network is differentiated by size and dominance of the linked nodes, characterized by physical or virtual flows of a wide-ranging variety. The analytic network process (ANP) is a multi-criteria analytic method that measures the influence or dominance of the nodes in a network with feedback. We illustrate how ANP determines county rank as a measure of influence in a metropolitan statistical area (MSA) defined by its interrelated socio-economic and spatial elements qualitatively and quantitatively. We compare the ANP results to similar measures of regional influence in the literature.     

测量系统分析及其监控策略

本文论述了测量系统波动源分离的两种方法:测量系统分析、田口方法,构造了测量系统本身的统计过程控制图——基于方差分量控制的控制图,以达到对测量过程本身的统计过程控制目的。最后给出了综合运用测量系统分析及监控技术的策略图。     

Local predictive ability of analyst recommendations

This article shows that locally aggregated analyst recommendations at the Metropolitan Statistical Area (MSA‐) or state‐level predict future locally aggregated excess returns. The results hold even after controlling for macroeconomic variables, industry and market returns, as well as investor sentiment. We also show that the local predictive ability of analyst recommendations is stronger for geographically concentrated firms. Additional analysis at the state‐level for the geographically concentrated firms reveals that locally aggregated analyst recommendations predict future local economic fundamentals. Overall, our findings suggest that analyst recommendations contain information at the MSA‐ and state‐level, and that local information content is richer for geographically concentrated firms.     

一种通信卫星在轨测试中群时延特性测量方法及工程实现

讨论了群时延的概念及群时延的测试原理和方法,并在通信卫星在轨测试的工程实现中,针对卫星转发器频段多及Ka频段转发器频率较高的特点,重点描述了综合群时延测试的方案设计及实现。经工程验证,该方法提高了在轨测试的效率和群时延测试精度。