نتایج جستجو برای: spatiotemporal analysis
تعداد نتایج: 2846431 فیلتر نتایج به سال:
The ability of Karhunen-Loève ~KL! decomposition to identify, extract, and separate the spatial features that characterize a spatiotemporal system is demonstrated using video images from a combustion experiment and nonstationary states from a phenomenological model. Cellular flames on a circular porous plug burner exhibit a variety of stationary and nonstationary patterns. KL decomposition is u...
We discuss analysis tools of spatiotemporal patterns. These tools are based on nearest-neighbor considerations similar to cellular automata. Application of these methods to a spatiotemporal data set means selecting certain scales in space and in time. Focusing on spatial length we show that the dependence of the results on this scale can be used to quantify separately the contribution to the dy...
There has been extensive research in formalising air traffic complexity, but existing works focus mainly on a metric to tie down the peak controllers workload rather than dynamic approach complexity that could guide both strategical, pre-tactical and tactical actions for smooth flow of aircraft. In this paper, aircraft interdependencies are formalized using graph theory four indicators describe...
Low-frequency cells in the anteroventral cochlear nucleus (AVCN) can be sensitive to changes in the spatiotemporal pattern of discharges across their auditory nerve (AN) inputs (). This sensitivity suggests that these cells may be tuned to particular spatiotemporal patterns, or features, in the discharge patterns of populations of AN fibers. To evaluate and characterize this sensitivity, we dev...
Spatiotemporal data model, which is the basis of spatiotemporal information management, deals with the representation and manipulation of spatiotemporal data. So far many spatiotemporal data models have been proposed, but most of them concentrated on the representation of spatiotemporal objects and few of them make systematic studies on spatiotemporal relationships. Based on the semantics of sp...
Objective Obesity and overweight have changed to very important factors in people movements in the modern world. Therefore, the present study was carried out to examine the effects of overweight on gait kinematic factors in children, young adults, middle-aged, and older adults. Methods The present study was a causal-comparative study in which 40 participants aged 9-85 were selected based on pu...
This paper presents MobiQuery, a spatiotemporal query service that allows mobile users to periodically collect sensor data from the physical environment through wireless sensor networks. A salient feature of \MQ is that it can meet stringent spatiotemporal performance constraints, including query latency, data freshness, and changing areas of interest due to user mobility. We present three just...
Security informatics involves the application of information technology to protect public health and security. A common research topic in security informatics is the identification and representation of clusters of events (e.g., a disease cluster or a crime hot-spot). Understanding why clusters change shape and move over time would be valuable to researchers in security informatics, providing t...
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