نتایج جستجو برای: stream power index
تعداد نتایج: 917771 فیلتر نتایج به سال:
The attentional blink (AB) is a deficit in conscious perception of the second of two targets if it follows the first within 200-500 msec. The AB phenomenon has been linked to pre-target oscillatory alpha activity. However, this is based on paradigms that use a rapid serial visual presentation (RSVP) stimulus stream in which the targets are embedded. This distracter stream is usually presented a...
[1] The Kyrgyz Range, located on the northern margin of the western Tian Shan, illustrates long-term (10–10 year) transient landscape evolution in response to an active basement-cored rock uplift. Eastward propagation of range uplift has progressively exposed resistant bedrock capped by a tilted, (formerly) planar, pre-Cenozoic unconformity. We develop an approximate, stream power–based analyti...
We describe the development of a bird integrity index (BII) that uses bird assemblage information to assess human impacts on 13 stream reaches in the Willamette Valley, Oregon, USA. We used bird survey data to test 62 candidate metrics representing aspects of bird taxonomic richness, tolerance or intolerance to human disturbance, dietary preferences, foraging techniques, and nesting strategies ...
A version of the communicating stream X-machine model is proposed, which gives a precise representation of the operation of transferring data from one X-machine to another. For this model it is shown that systems of communicating Xmachines have the same computational power as single stream X-machines. This enable existing methods for deriving test strategies for stream X-machines to be extended...
commonly used environmental flow evaluation techniques range in complexity. some requires stream flow records alone, and some accounts for the habitat requirements of individual species life-stages and physical characteristics of the stream. hydrological based methods for environmental flow assessment are the first step in planning for environmental allocation in developing countries. for deter...
We study the problem of indexing continuous data streams in which data are heterogeneous in structure. Such data streams arise naturally in many real-life scenarios such as sensor networks. Our index structure uses bitmap based techniques to efficiently sketch the structures to allow space-efficient lossless archiving of the data stream. It also allows very fast query processing on the archived...
با گسترش روزافزون تکنولوژی های نوین ارتباطی نظیر سیستم های کامپیوتری و شبکه اینترنت، استفاده از داده های رسانه ای نظیر صوت، تصویر ثابت و نیز تصویر متحرک (ویدئو) به طرز چشم گیری افزایش یافته است. امروزه این گونه داده ها به شکل گسترده ای با جنبه های مختلف از زندگی روزمره نظیر آموزش، تجارت و سیاست پیوند خورده اند. در این میان به منظور حفظ امنیت و محرمانگی داده های دیجیتال، محتوای اینگونه داده ها م...
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