In this paper, we present a detailed evaluation of cross wavelet analysis of bivariate time series. We develop a statistical test for zero wavelet coherency based on Monte Carlo simulations. If at least one of the two processes considered is Gaussian white noise, an approximative formula for the critical value can be utilized. In a second part, typical pitfalls of wavelet cross spectra and wave...

This paper presents a new coherency identification method for dynamic reduction of a power system. To achieve dynamic reduction, coherency-based equivalence techniques divide generators into groups according to coherency, and then aggregate them. In order to minimize the changes in the dynamic response of the reduced equivalent system, coherency identification of the generators should be clearl...

An important issue in the dissemination of time-varying web data such as sports scores and stock prices is the maintenance of temporal coherency. In the case of servers adhering to the HTTP protocol, clients need to frequently pull the data based on the dynamics of the data and a user’s coherency requirements. In contrast, servers that possess push capability maintain state information pertaini...

The scalability of cache coherency schemes plays a major role in the overall performance of any scalable distributed system that utilises client data caching. In particular, transactional cache coherency algorithms must be scalable if the systems that are built around them, such as persistent object stores, are to be scalable. The avoidance-based transactional cache coherency [Hughes 1998] algo...

Structural models with no solution are incoherent, and those multiple solutions incomplete. We show that occasionally binding constraints not generically coherent. Coherency requires restrictions on the parameters or support of distribution shocks. In presence shocks, cannot be independent from each other, so assumption orthogonality structural shocks is incompatible coherency. Models whose coh...

HEIGHTS WITH POLINSAR DATA Lulu Tan , Ruliang Yang, Weidong Yu 1 Institute of electronics, Chinese Academy of Sciences, China; 2 Graduate University of Chinese Academy of Sciences, China. Email: [email protected]; [email protected]; Polarimetric synthetic aperture radar interferometry (PolInSAR) is a perspective remote sensing technique that has been intensively used for extracting forest ...

This work studies the interaction of Web proxy cache coherency and replacement policies using trace-driven simulations. We speciically examine the relative importance of each type of policy in aaecting the overall costs, the potential of incorporating coherency issues in cache replacement and the inclusion of additional factors such as frequency of resource use in replacement and coherency poli...