| 词汇 | cobweb |
| 释义 | cobweb noun[ C ] uk /ˈkɒb.web/ us /ˈkɑːb.web/ a structure like a net of sticky silk threads made by a spider for catching insects蜘蛛网 Moritz Haisch/EyeEm/GettyImages Animal dwellings - natural anthill arboreal biome burrow byre cobwebby earth foxhole guest habitat hole holt lair lodge molehill rookery sett spider's web warren wildlife corridor You can also find related words, phrases, and synonyms in the topics: Nets, grids and grilles The cellar was damp, and great curtains of cobwebs, like gray lace, fell over the empty bins and wine-vaults. The place was foul with dirt and cobwebs, full of a musty odor. The plaster fallen off the walls covered the floor, and when the door was opened a horrible tapestry of black cobwebs waved in the draught. cobweb | American Dictionarycobweb noun[ Cusually pl ] us/ˈkɑbˌweb/ a structure of thin, sticky threads made by a spider (= small creature with eight legs), esp. when the threads are covered with dust: Cobwebs hung down from the rafters. Examples of cobwebcobweb There have been a number of earlier "cobweb experiments" related to our work. The next morning, she gets up very early, and finds the house dusty, full of cobwebs and badly arranged. The cobweb model has played an important role in economic dynamics, in particular with respect to the role of expectation formation. Section 3 briefly recalls some benchmark expectation and learning models in the cobweb framework. The parameter tunes the nonlinearity of the supply curve and the stability of the underlying cobweb model. For example, the convergence of moving-average schemes is smooth without fluctuations, least-squares and cobweb expectations diverge away for the cobweb-unstable case. The second section describes applications of the genetic algorithm to the cobweb model, which has a unique rational-expectations equilibrium. In our cobweb experiments, subjects have to predict the next period's price of a certain unspecified good. A key feature of the cobweb expectations feedback structure is that it is self-reversing in the following sense. The harps and their music seem almost invisible and suspended in time, like a cobweb. The concept is illustrated for the multivariate linear model as well as for models of the cobweb type, confirming results known from the literature. Which expectations hypothesis is a good description of aggregate realized market price fluctuations in a cobweb economy? Simulations using different cobweb and genetic algorithm parameter values converged for both cobweb-stable-and-unstable cases. In the simulations, demand and supply curves are the same as in the strongly unstable treatment of our cobweb experiments. In a cobweb-type commodity market, aggregate equilibrium prices are driven by producers' individual price expectations. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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