We present an efficient “broad phase” algorithm for selecting candidate collision pairs in N-body simulation. As our technique is derived from kd-trees, we first introduce some background kdtree concepts and their geometrical interpretation. Then we cover the construction of a linear kd-tree and its use in N-body simulation. We finally study its time and memory complexity, and compare the perfo...

Results: The experimental results showed that the recovery of variable concentrations polymer flooding was higher than that of constant concentration polymer flooding, under conditions of same total amount of polymer and similar water flooding recovery. Its sweep efficiency and displacement efficiency were also significantly higher than those of constant concentration polymer flooding. Moreover...

sunn pest (eurygaster integriceps put.) cause serious economic damage to wheat and barley in borujerd, north of lorestan province, iran. sweep net sampling, is the most convenient sampling procedure for many arthropods, but it is difficult to interpret in terms of accuracy and precision. much of the variation of sweep net catches, stems from human factors and its calibration. in this research, ...

Insect populations vary in the proportion of individuals exhibiting a particular ‘state’ (e.g., developmental stage, sex, egg load, or nutritional status). Because an insect’s developmental state often determines both its size and its behavior, it is likely that this will also affect the probability of being sampled. We propose that a comprehensive approach to pest management must consider the ...

This paper describes the plane sweep algorithm for optimal use of tandem replicated data in a document. It is based on an observation that the original plane sweep algorithm is used to search in documents. Plane sweep algorithm does not feature a fast algorithm to find the word that is repeated in tandem in a document. With the help of effective parameters we could make a new technique to creat...

Zero echo time can be obtained in MRI by performing radiofrequency (RF) excitation as well as acquisition in the presence of a constant gradient applied for purely frequency-encoded, radial centre-out k-space encoding. In this approach, the spatially nonselective excitation must uniformly cover the full frequency bandwidth spanned by the readout gradient. This can be accomplished either by shor...

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