Cascade detectors have been shown to operate extremely rapidly, with high accuracy, and have important applications such as face detection. Driven by this success, cascade learning has been an area of active research in recent years. Nevertheless, there are still challenging technical problems during the training process of cascade detectors. In particular, determining the optimal target detect...

the Haar Cascade Classifier is a popular technique for object detection that uses machine-learning approach to identify objects in images and videos. In context of face detection, algorithm series classifiers are trained on thousands positive negative regions image may contain face. The multi-stage process involves collecting training data, extracting features, classifiers, building cascade cla...

Here we present for the first time a detailed study of the cascade process of two linked quantum vortex loops under the Gross-Pitaevskii equation. After a series of successive reconnections the vortex system decays to three distinct loops. Kinetic helicity as well as various geometric and topological properties associated with helicity are examined throughout the reconnection events, providing ...

A procedure is presented for the automatic tuning of cascade control systems. The main goal of the procedure is to achieve fast tuning, and moderate process upset. That goal is pursued by proper combination of an ad hoc relay-based identification procedure based on a single test, a specific controller structure, and a tuning rule based on a particular use of the IMC principle. Simulations are r...

In this paper, we propose a method to apply the popular cascade classifier into face recognition to improve the computational efficiency while keeping high recognition rate. In large scale face recognition systems, because the probability of feature templates coming from different subjects is very high, most of the matching pairs will be rejected by the early stages of the cascade. Therefore, t...

We study the processes of heterodiffusion admixtures in case their cascade decay a body with two ways migration accompanied by mass exchange between states. For unbranched decay, we formulate coupled cascade-type initial-boundary-value problems which solutions problem for certain stage play role sources next stage. The are constructed using an iterative procedure help Green functions. obtain ex...

This paper focuses on the design of a cascade within a cold stream thrust reverser during the early, conceptual stage of the product development process. A reliable procedure is developed for the exchange of geometric and load data between a two dimensional aerodynamic model and a three dimensional structural model. Aerodynamic and structural simulations are carried out using realistic operatin...

We propose a scheme to generate intense, ultrafast mid-infrared pulses with conversion efficiencies exceeding the upper bound for single-stage difference-frequency mixing as predicted by the Manley-Rowe relations. Finite-element fast Fourier transform simulations of the mixing process show that the parametric cascade downconverter generates 1.7 times more photons (at 10 microm) than in the init...

In object detection, an intersection over union (IoU) threshold is required to define positives and negatives. An object detector, trained with low IoU threshold, e.g. 0.5, usually produces noisy detections. However, detection performance tends to degrade with increasing the IoU thresholds. Two main factors are responsible for this: 1) overfitting during training, due to exponentially vanishing...