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This paper presents a fault diagnosis approach that is the combination with Gaussian mixture models and variable reconstruction. Usually, the traditional multivariate process monitoring techniques has the fundamental assumption that the operating data should follow a unimodal Gaussian distribution, but it often becomes invalid due to the practice different operating conditions. The Gaussian mixture...
The statistical process control (SPC) chart is effective in detecting process shifts. One important assumption for using the traditional SPC charts requires that the plotted observations are independent to each other. Otherwise, the so called "false alarm" would be increased, and these improper signals result in the wrong interpretation. However, this independent assumption is often not...
This paper proposes a bed environment where user can actively work in bedridden posture. The proposed bed environment is using a nursing bed as the base, and has an overhead lighting, a screen, and a projector. The environmental conditions, such as bed angle, table angle, and screen distance and angle, and the number of electric bulbs of lightings and its angle, were evaluated by performing questionnaire...
This paper presents a non-intrusive fatigue detection system based on the video analysis of drivers. The system relies on multiple visual cues to characterize the level of alertness of the driver. The parameters used for detecting fatigue are: eye closure duration measured through eye state information and yawning analyzed through mouth state information. Initially, the face is located through Viola-Jones...
Based on the analysis of rotor imbalance mechanism, the presumption of extracting early fault features of rotor imbalance through the utilization of wavelet packet noise elimination and feature zoom as well as conducting self healing monitoring over the rotor imbalance through the utilization of electromagnetic induction principle is proposed. In addition, simulation experiment is applied to prove...
In order to improve the flight safety and establish a better environment for aircraft maintenance, we design a remote fault diagnosis system of aircraft. The system is based on .NET framework and latest aircraft fault diagnosis technologies. Under a hierarchical design conception, it is divided into three parts: onboard aircraft diagnosis system, ground diagnosis centre and remote expert client. The...
Energy crisis led to the recognition that the energy conservation is important. The aim of performance test rig of a water chiller which is introduced in this paper is just for the energy saving. In order to get the better efficiency, a monitoring system for this test rig was developed. The design idea and the development steps of the system would be introduced in detail, and this might be helpful...
Wide varieties of potential hazards exist in industrial production process. They are different among diverse industries and distinct scales of production for various storage circumstances of raw materials. The management agencies under government and enterprises, and the safety evaluation personnel should pay close attention to the accident-prone places and the probability of the incidents in those...
This paper proposes a three-stage scheme to obtain real-time and reliable face detection in intersecting monitoring. The proposed three-stage scheme is mainly based on skin color and facial features. In the first stage scheme, skin-color model is used to obtain skin regions. The second stage scheme uses face template measure to obtain face candidates. Finally, facial features are measured to detect...
To overcome the problems happening to most current weather-related terminal software systems, on which the information is organized in a two-dimensional way, with poor information representation ability, as well as a single dull expression technique, this paper study the superiority of managed DirectX and C# in software development, and then propose a 3D meteorology monitoring system based on multi-resolution...
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