منابع مشابه
Hasty Congregational Gradient Descent
Stepwise Gradient Descent (SGD) algorithms for online optimization converge to local minima of the relevant cost function. In this paper a globally convergent modification of SGD is proposed, in which several solutions of SGD are run in parallel, together with online estimates of the cost function and its gradient. As each SGD estimate reaches a local minimum of the cost, the fitness of the mem...
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Hasty Conclusion About Acupuncture for Hypertension? To the Editor: In his editorial commentary, “Acupuncture for Hypertension,” Kaplan1 unequivocally concludes that, “acupuncture is of no value for the treatment of hypertension.” In their clinical trial, Macklin et al2 randomly assigned hypertensive subjects to 1 of 3 interventions using “individualized,” “standardized,” or “sham” acupuncture....
متن کاملEarly exit: Estimating and explaining early exit from drug treatment
BACKGROUND Early exit (drop-out) from drug treatment can mean that drug users do not derive the full benefits that treatment potentially offers. Additionally, it may mean that scarce treatment resources are used inefficiently. Understanding the factors that lead to early exit from treatment should enable services to operate more effectively and better reduce drug related harm. To date, few stud...
متن کاملExit from the Hospital Industry
We study the exit of hospitals from the market for inpatient services. More generous hospital reimbursement significantly reduces the probability of exit throughout the 1990s. Conditional on reimbursement levels, hospital efficiency was not a significant determinant in the early 1990s but in the midto late 1990s, less efficient hospitals were significantly more likely to exit. Throughout the pe...
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Mapping changes in glacier extent from repeat optical satellite data has revealed widespread glacier decline in nearly all regions of the world over the past few decades. While numerous studies have documented the changes of the outlet glaciers of the Northern and Southern Patagonia Icefields (NPI/SPI), information about glacier changes in the Patagonian Andes (to the north of the NPI) is much ...
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ژورنال
عنوان ژورنال: Nature
سال: 1993
ISSN: 0028-0836,1476-4687
DOI: 10.1038/364273b0