منابع مشابه
Letters and Comments
Geng and Cai suggested a modified He’s frequency–amplitude formulation for nonlinear oscillators (Geng and Cai 2007 Eur. J. Phys. 28 923–31). We point out the accuracy of both the original one and the modified version depends upon the chosen location point, and so far we have no general rule for the location choice. The method of weighted residuals is suggested to overcome the shortcoming.
متن کاملComments and Letters to the Editor
Several contrasting uses of the terms macro(large) and micro(small) pore can be identified in soil science literature. In some cases macropores are (i) considered to be pores > 15 (Marshall, 1959) or 100 /im in diam (Bouma et al., 1977) or (ii) implied to be even larger when described in terms of wormholes (Ehlers, 1975), root channels (Aubertin, 1971). and shrinkage cracks (Lewis, 1977). The s...
متن کاملLetters and Comments/lettres Et Commentaires
Succession is the sequence of changes that occur on a site after a disturbance. In desert streams, flash floods evince high mortality among biota, largely by scouring fine gravel substrates, and interflood periods are marked by pronounced, rapid change in a host of attributes, that is, succession occurs (Fisher et al. 1982). 1 proposed (Fisher 1983) that this pattern may not occur in New Englan...
متن کاملNOTES, COMMENTS, AND LETTERS TO THE EDITOR The Revelation of Information and Self-Fulfilling Beliefs*
At a Rational Expectations Equilibrium (REE), individuals are assumed to know the map from states to prices. This hypothesis has two components, that agents agree (consensus) and that they have point expectations (degeneracy). We consider economies where agents' beliefs are described by a joint distribution on states and prices, and these beliefs are fulfilled at equilibrium. Beliefs are self-f...
متن کاملNOTES, COMMENTS, AND LETTERS TO THE EDITOR A Simple Model of Equilibrium in Search Procedures*
The paper presents a simple game-theoretic model in which players decide on search procedures for a prize located in one of a set of labeled boxes. The prize is awarded to the player who finds it first. A player can decide on the number of (costly) search units he employs and on the order in which he conducts the search. It is shown that in equilibrium, the players employ an equal number of sea...
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ژورنال
عنوان ژورنال: Veterinary Pathology
سال: 1974
ISSN: 0300-9858,1544-2217
DOI: 10.1177/030098587401100211