منابع مشابه
Frequency response of ice streams
Changes at the grounding line of ice streams have consequences for inland ice dynamics and hence sea level. Despite substantial evidence documenting upstream propagation of frontal change, the mechanisms by which these changes are transmitted inland are not well understood. In this vein, the frequency response of an idealized ice stream to periodic forcing in the downstream strain rate is exami...
متن کاملOf Isbræ and Ice Streams
Fast flowing ice streams and outlet glaciers provide the major avenues for ice flow from past and present ice sheets. These ice streams move faster than the surrounding ice sheet by a factor of one hundred or more. Several mechanisms for fast ice stream flow have been identified, leading to a spectrum of different ice stream types. In this paper we discuss the two end members of this spectrum, ...
متن کاملFrequency of Bacterial Frequency of Bacterial Contamination in Traditional Ice Cream Produced in Arak, Iran (2011)
Abstract Background and Objective: Ice cream is a suitable environment for microbial growth due to its chemical structure, ingredients, and its increased supply and demand. In the absence of hygienic considerations, it can cause poisoning. This study aimed to determine bacterial contamination in traditional ice cream produced in Arak city in 2011. Material and Methods: The samples (n= 30) were ...
متن کاملFrequency Moments in Streams
Estimating f0 Here we describe an algorithm for estimating f0 which merges (and hopefully simplifies) ideas from [1] and [2]. First, assume a hash function h : a → [0, 1] uniformly. Let us define a random variable X = minih(ai). Intuitively, X should be roughly 1/m and therefore 1/X should be a fair estimate of m. This is almost true. In what comes next we make this into an exact statement. Let...
متن کاملEstimating Frequency Moments of Streams
We will develop algorithms that can approximate Fk by making one pass of the stream and using a small amount of memory o(n+m). Frequency moments have a number of applications. F0 represents the number of distinct elements in the streams (which the FM-sketch from last class estimates using O(log n) space. F1 is the number of elements in the stream m. F2 is used in database optimization engines t...
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ژورنال
عنوان ژورنال: Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
سال: 2012
ISSN: 1364-5021,1471-2946
DOI: 10.1098/rspa.2012.0180