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Prediction of aircraft Auxiliary Power Unit (APU) degradation plays an important role in aircraft health monitoring and condition-based maintenance. Due to complexity of the system and the variability and stochastic nature of the working environment, the degradation of the APU engine is hardly to be described by traditional deterministic time series analysis. Alternatively, advanced probabilistic...
A high gain cavity-backed circular patch antenna array is designed by using surface micromachining technology. The antenna array is fed by eight-ways power divider, which is designed by using rectangular micro-coaxial transmission line. The antenna array with the specified size of 18.5mm×9.76mm×0.36mm and bandwidth shows around 6 GHz (59∼65GHz) under the condition of voltage standing wave ratio (VSWR)...
As development of wireless communication, information technology and radio frequency identification technology, the Internet of Things (IoT) network architecture that can implement direct communication between human beings, human and machine, human and things as well as thins and things is increasingly clear. Based on introduction of related concepts of IoT, opportunities and challenges confronted...
Statistical process control techniques have found widespread application in industry for process improvement and for estimating process parameters or determining capability. Unfortunately, the assumption of uncorrelated or independent observations is not even approximately satisfied in some manufacturing processes. All manufacturing processes are driven by inertial elements, and the frequency of sampling...
A initiative and self-governing hybrid Agent system having fine capabilities of reaction and thinking has been designed to solve the problem of UAV(Unmanned Aerial Vehicle) Coordinated flight and Cooperative mission. UAV coordinated flight is realized by devising the tracking algorithm and Artificial Potential Field method in the system. For the cooperative mission in the system, the BDI model is...
How to save energy for target tracking in WSNs is an important issue. The basic idea of energy-saving method is using sleep mechanism. However, if nodes enter sleep state too much, targets may lose easily from the sleeping nodes. It is high consuming the energy to find back these losing targets. Thus, it would notice accuracy of tracing targets when saving energy. In this proposal, it offers a scheme...
This paper presents a novel tracking laser Doppler velocimeter that can achieve precision measurement of the target's velocity along the optical axis. To meet the needs, we designed a feedback control system and the Pseudo-Random Sample Consensus algorithm, which are able to ensure the rapid identification and automatic tracking of the target. In addition, employing the retroreflective sheeting makes...
To improve the automatic level of the large tank farm detection, the oil tank measurement and control system based on Lon works field bus were built, which can monitor the oil tank in remote monitoring center and display the measurement parameters by the LCD in the field. The system uses the advanced measurement approach to improve the measurement accuracy and real-time. The system consists of filed...
A kind of embedded smart home system Machine adopted M2M (Machine to Machine) technology is designed, home appliances real-time control and remote communication can be realized. M2M is a new type of data transmission technology, and the most direct communication mode of equipment and equipment. System chose samsung's S3CZ44B0X as MPU, with LINUX operating system, and adopted 3G wireless communication...
The 2D axisymmetric, real gas model was developed to calculate the ejector in the ejector cooling system. The calculation of the real gas model occupies more computer resources, but its result can be more authentic. The CFD model was validated with available experimental data. Predictions at the operating conditions in the ejector cooling system were discussed. The aim of the prediction is to obtain...
In order to improve the management level, promote informationization and automation in textile enterprise, a kind of loom's monitor system based on DSP and CAN bus for rapier loom is discussed in this article. The system is designed by connecting the computers from every workshops (detect real-time computer) with computer from offices (monitor computer) through intranet. It has functions of data recording,...
In practice engineering, some process parameters, which are pivotal to enhance the product ability, can not be monitored online and offline. In this paper, two methods are proposed for monitoring the so-called unmeasured parameters such as level of coal powder in power plant. The first model is nonlinear PLS model based on precise training samples, and the second one is evidential soft sensor model...
Wireless foundation fieldbus (WFF) is put forward and used to provide wireless communication services for process industrial field devices to implement monitoring, control and management tasks. WFF communication model consists of the foundation fieldbus (FF) user layer and application layer, the data link layer and the IEEE802.11 physical layer. The WFF data link layer combines FF and IEEE802.11 mechanisms...
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