Given a set of rectangles with fixed orientations, we want to find an enclosing rectangle of minimum area that contains them all with no overlap. Many simple scheduling tasks can be modelled by this NP-complete problem. We use an anytime branch-and-bound algorithm to solve the problem optimally. Our main contributions are a lower-bound on the amount of wasted space in a partial solution, based ...

An effective two-dimensional micromixer named rectangle-square wave micromixer with very simple structure has been presented. The rectangle-square wave micromixer based on split and recombination principle was simulated to analyze the fluid flow and the mixing efficiency. The flow rate, sample concentration, pressure drop at different position in the micromixer was researched. The simulation re...

This paper describes a novel compact hardware oriented algorithm and its conceptual implementation for real-time traffic signs detection system. The speed limit sign area on a grayscale video frame is detected based on a novel, simple and compact rectangle pattern matching and circle detection modules. The speed limit recognition system is divided into two-pipeline stages. The frame is scanned ...

Using two rice genotypes as a test system (OP1505 and OP1509), the aim of this study was to develop an agronomic workflow for Se biofortification through foliar fertilization (with sodium selenate selenite). During process, state culture (slope, surface drainage, water lines normalized differences vegetation index—NDVI), using Unmanned Aerial Vehicles synchronized by global positioning (GPS) fu...

this report summarizes the results of 64 percutaneous catheter drainage of abdominal abscesses and fluid collections in 56 patients. aspiration and drainage was guided with computed tomography in 34 patients and with ultrasound in 30 patients. success rate was 90%. infected collections were successfully drained in 94% and noninfected collections in 72% . partial success was achieved in two pati...

We report high resolution (R∼37,000) integral field spectroscopy of the central region (r<14 arcsec) of the Red Rectangle nebula surrounding HD44179. The observations focus on the λ5800Å emission feature, the bluest of the yellow/red emission bands in the Red Rectangle. We propose that the emission feature, widely believed to be a molecular emission band, is not a molecular rotation contour, bu...

1. Six octopuses were trained on a series of visual discrimination tasks where the discriminanda were presented simultaneously, and where different tasks alternated in a single training session. 2. All the octopuses could make discriminations based on brightness and orientation over the same period of time. 3. Over a period in which all octopuses discriminated a black from a white vertical rect...

The face pattern is described by pairs of template-based histogram and Fisher projection orientation under the paradigm of AdaBoost learning in this paper. We assume that a set of templates are available first. To avoid making strong assumptions about distributional structure while still retaining good properties for estimation, the classical statistical model, histogram, is used to summarize t...

Sand coverings account for a large part of the cost of a project. The purpose of this study is to evaluate the performance of different coatings for filtration of underground drains and reduce the cost of cornfield farms. The experiments were carried out in farm in Salman Farsi. The subsoil drainage was fitted to each test piece with a length of 120 meters, a diameter of 100 mm, and a distance ...