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Fault detection and isolation (FDI), which is a critical part of modern industrial systems, plays a key role in the maintainability, safety, and reliability of processes. Existing FDI approaches are dependent on varying degrees of knowledge of the process, limiting their implementation in practical industrial processes. Based on the least absolute shrinkage and selection operator (lasso), this paper...
Fault isolation is an essential step in multivariate statistical process monitoring, which discovers the cause of the detected fault. The common adopted techniques for fault isolation, such as contribution plots, reconstruction analysis, branch and bound, etc., often suffer from the problems of the smearing effect, insufficient historical fault data, and heavy computational burden. In this paper,...
All sorts of Malwares severely threaten users in Internet. These malwares do share some common characteristics, despite malware and its variants may vary a lot from content signatures. The common characteristics they shared can be used to reveal the real intent of malware. In this paper, we study on the behavior characteristics of malwares in Internet, and based on which we present the method to extract...
The hydrogen gas sensor based on air-gap long period fiber grating (AG-LPG) with the coated Pd thin-film is experimentally demonstrated with the sensitivity of 0.165 nm/% and can detect the minimum concentration of 606.06 ppm.
The printability of the solder paste is critical to product yield in a SMT (Surface Mount Technology) line. Both the material and the process must be controlled to minimize variations in solder paste printability and reduce soldering defects. In this letter we describe a newly developed print tester that measures characteristics of the squeegee/drum-stencil interaction to monitor the printability...
The performance of the battery pack will directly affect the rapid development of the electric vehicle. In this paper, it presents that in the various states, the Li-lon Battery are controlled and protected by bq78pl114-the latest Battery Management Controller made in TI CO., LTD, and introduces its features. Many controllers are operated on real time by Single Chip Micyoco, it will show the states...
Parameter back-analysis of the initial stress state of underground rock is studied by the differential evolution (DE) algorithm and artificial neural network (ANN). Based on the observed deformation of underground workshop, a three-dimensional numerical model for back-analysis in the initial stress field of underground rock is put forward in the case study of an engineering project. In the process...
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