Images captured in foggy weather conditions often suffer from poor visibility, which will create a lot of impacts on the outdoor computer vision systems, such as video surveillance, intelligent transportation assistance system, remote sensing space cameras and so on. In this paper, we propose a new transmission estimated method to improve the visibility of single input image (with fog or haze),...

Introduction: Expiratory upper airway obstruction during bag-mask ventilation is not well characterized. Methods: An audit was done to assess expiratory obstruction in 90 adult surgical patients undergoing bag-mask ventilation during the induction of general anaesthesia. Results: Clinicians experienced difficulty delivering gas to the lungs when the head was neutral in 52 of 90 patients (58%; i...

Laser-induced forward transfer (LIFT) is a high-resolution direct-write technique, which can print a wide range of liquid materials without a nozzle. In this process, a pulsed laser initiates the expulsion of a highvelocity micro-jet of fluid from a thin donor film. LIFT involves a novel regime for impulsively driven free-surface jetting in that viscous forces developed in the thin film become ...

We present an optimization algorithm for the study of induced drag minimization, with applications to unconventional aircraft design. The algorithm is based on a discrete-adjoint formulation and uses an efficient parallel-Newton-Krylov solution strategy. We validate the optimizer by recovering an elliptical lift distribution using twist optimization; we believe this an important, and under-appr...

An optimization procedure aimed at the design of multicomponent airfoils for high-lift applications is described. The procedure is based on a multiobjective genetic algorithm; two #ow solvers have been coupled with the genetic algorithm: a viscous}inviscid interaction method, based on an Euler #ow solver and an integral boundary layer routine, and a method based on a full potential #ow solver. ...

In this paper, lift and drag coefficients were numerically investigated using NUMECA software in a set of 4-digit NACA airfoils. Two metamodels based on the evolved group method of data handling (GMDH) type neural networks were then obtained for modeling both lift coefficient (CL) and drag coefficient (CD) with respect to the geometrical design parameters. After using such obtained polynomial n...

Multistage model predictive control is a robust MPC formulation that takes into account parametric uncertainty by constructing finite set of coupled scenarios. As the amount scenarios increase so does computational cost and real-time implementation might not be possible. Scenario decomposition has been proposed to distribute computations make possible, however, typically subproblems are coordin...

The microflora developing during a continuous enrichment culture from a hydrothermal chimney sample was investigated by molecular methods. The culture was performed in a gas-lift bioreactor under anaerobic conditions, at 90°C and pH 6.5, on a complex medium containing sulfur as the terminal electron acceptor. Archaeal and bacterial diversity was studied. Microorganisms affiliated with the gener...

The traditional optimum modes of gas-lift production are usually established by taking the injected gas rate as a decision variable and maximum oil objective function. After solving model, rates single wells obtained, then productions wells, total well groups economic profit can be obtained. However, models do not take both different types performance curves (GLPCs) cost factors technique into ...