منابع مشابه
No more free lunches.
Free pens and pizza lunches. Sponsored conferences and compromised medical education. Courtesy golf and unaffordable holidays. Thought leaders and ghost writers. These are the trappings of doctors and drug companies being entwined in an embrace of avarice and excess, an embrace that distorts medical information and patient care. An article in this theme issue of the BMJ identifies 16 ways in wh...
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The development of new oral antagonists of the platelet P2Y12 receptor has generated both anticipation and anxiety among practising physicians. In a field in which clopidogrel was the only choice available for the better part of a decade, prasugrel and ticagrelor represent new treatment options in many parts of the world. Weighing efficacy, safety, and cost to determine appropriate use of these...
متن کاملNote on free lunches and cross - validationCyril
The \no free lunch" theorems (Wolpert and Macready, 1995) have sparked heated debate in the computational learning community. A recent communication, (Zhu and Rohwer, 1996) attempts to demonstrate the ineeciency of cross-validation on a simple problem. We elaborate on this result by considering a broader class of cross-validation. We show that when used more strictly, cross-validation can yield...
متن کاملNo Free Lunches in Multi-Agent Systems, — a Characteristic Distribution Approach to Game Theoretic Modelling
We introduce the notion of Characteristic Distributions which is a way of representing information about the payoffs of different behaviors in a Multi-agent System. We discuss how they can be used to simplify and structure the analysis of strategies and prove i) the existence of optimal environments, given a certain behavior, and ii) that all behaviors payoff equally, when taken over all possib...
متن کاملComputation with Absolutely No Space Overhead
We study Turing machines that are allowed absolutely no space overhead. The only work space the machines have, beyond the fixed amount of memory implicit in their finite-state control, is that which they can create by cannibalizing the input bits’ own space. This model more closely reflects the fixed-sized memory of real computers than does the standard complexity-theoretic model of linear spac...
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ژورنال
عنوان ژورنال: Theoretical Computer Science
سال: 2020
ISSN: 0304-3975
DOI: 10.1016/j.tcs.2020.09.013