Local stationarity of a L(R) bandpass random process reflects in specific regions of either the frequency plane of its 2 dimensional power spectrum or the time-frequency plane of its Wigner distribution. The paper addresses the problem of estimating from data a covariance matrix that satisfies the constraint of being locally stationary. We also show, with a real-data case study, the improvement...

in this paper, the effect of financial liberalization on household’s budget liquidity constraint is analyzed with the use of an error correction model. financial liberalization will decline liquidity constraint, with expanding means of making future incomes available for present consumption. here a financial liberalization index for iran is defined using principal component analysis technique, ...

1 Information-theoretic limits of fading channels have been discussed extensively in the literature under average power constraints. In this paper, we introduce total energy constraints on transmission and study dynamic power control on a time varying channel. Three types of delay constraints are discussed: no delay constraint, soft delay constraint and strict delay constraint. We consider a bl...

Constraint propagation algorithms present inherent parallelism. Each constraint behaves as a concurrent process triggered by changes in the store of variables, updating the store in its turn. There is an inherent sequentiality, as well, since a constraint must be executed only as the consequence of a previous execution of another constraint. We have developed di erent parallel execution models ...

the objective of this study is to examine the effect of mispricing on firm’s investment behavior and capital structure. it also tests the role of the level of financial constraints in the relationship between mispricing , investment and capital structure. using data of 110 firms of tehran stock exchang from 1384-1389, results indicated that mispricing has negative impact to firms investment. ho...

In this paper, we describe a new datapath scheduling algorithm called DFCS based on the concept of dynamic frequency clocking. In dynamic frequency clocking scheme, all functional units in the datapath are driven by a single clock line that switches frequency dynamically at run time. The algorithm schedules lower frequency operators at earlier steps and delays higher frequency operators to late...

Abstract Aiming at the problem of frequency stability and voltage a new power system, this paper provides energy index method based on constraints in standby category system. Several concepts, such as maximum disturbance constraint minimum reserve capacity, are proposed. Two constraints, balance, set, factors to be considered, load effect, security control measure, demand-side response, primary...