منابع مشابه
Intelligent Agents on the Internet: Fact, Fiction, and Forecast
Computer technology has dramatically enhanced our ability to generate, deliver, and store information. Unfortunately, our tools for locating, ltering, and analyzing information have not kept pace. A popular solution is intelligent agents. But what are they? We provide a survey showing the myriad ways in which the evocative term \agent" is interpreted by researchers in the eld. Following the \In...
متن کاملDensity forecast revisions and forecast efficiency
We explain that revisions to successive density forecasts of the same outcome, as measured by the Kullback-Leibler Information Criterion, need not be unpredictable, unlike those to conditional mean forecasts, even when the forecaster uses information efficiently. However one can still test the efficiency of fixed-event conditional density forecasts, similarly to conditional mean forecasts, by t...
متن کاملDLP and FaCT
DLP [Patel-Schneider(1998)] and FaCT [Horrocks(1998)] are two recent description logic systems that contain sound and complete reasoners for expressive description logics. Due to the equivalences between expressive description logics and propositional modal logics, both DLP and FaCT can be used as satisfiability checkers for propositional modal logics. FaCT is a full-featured system that contai...
متن کامل“ Fact , Fable , and Darwin ”
I write as neither a creationist nor a Darwinist, but as one who knows what is probably the most disreputable scientific secret of the past century: There is no plausible scientific theory of the origin of species! Darwin himself was not sure he had produced one, and for many decades every competent evolutionary biologist has known that he did not. Although the experts have kept quiet when true...
متن کاملGeneralized Forecast Errors, A Change of Measure, and Forecast Optimality
This paper establishes properties of optimal forecasts under general loss functions, extending existing results obtained under speci c functional forms and data generating processes. We propose a new method that changes the probability measure under which the well-known properties of optimal forecasts under mean squared error loss can be recovered. We illustrate the proposed methods through an ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature
سال: 1901
ISSN: 0028-0836,1476-4687
DOI: 10.1038/064400b0