A long landing is one type of flight incident that will multiply the risk of a runway excursion. It occurs frequently but receives little attention in research due to difficulty in obtaining the real flight data. The aim of this paper is to discover key flight parameter features of long landing incidents by analyzing Quick Access Recorder (QAR) data and put forward prevention measures from the ...

Computer simulators are widely used for the study of complex systems. In many applications, there multiple available with different scientific interpretations underlying mechanism, and goal is to identify an optimal simulator based on observed physical experiments. To achieve goal, we propose a selection criterion leave-one-out cross-validation. This consists goodness-of-fit measure generalized...

Quantum simulation can help us study poorly understood topics such as high-temperature superconductivity and drug design. However, existing quantum algorithms for current computers often have drawbacks that impede their application. Here, we provide a hybrid quantum-classical algorithm simulating the dynamics of systems. Our approach takes ansatz wave function linear combination states. The sta...

background: the accuracy and reproducibility of measurements in a locally made three dimensional (3d) simulator was assessed and compared with manual caliper measurements. materials and methods: a total of 20 casts were scanned by our laser scanner. software capabilities included dimensional measurements, transformation and rotation of the cast as a whole, separation and rotation of each tooth ...