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Hernandez W.,Technical University of Madrid | De Vicente J.,Technical University of Madrid | Sergiyenko O.,Autonomous University of Baja California | Tyrsa V.,Technical University Baja California
IECON Proceedings (Industrial Electronics Conference) | Year: 2010

In this paper, the acceleration of a car under performance tests is estimated by using a Kalman filter. Here, the observation vector consists of the observation of both the velocity and the longitudinal acceleration of the car. This is the process vector and is the input of the filter. The output is the filtered estimate of the state vector, which consist of the velocity and longitudinal acceleration of the car. The accelerometer is modeled as a linear dynamical system in which the acceleration is a Wiener process, the state vector is corrupted by process noise and the observation vector by measurement noise. The process noise and the measurement noise are modeled as zero-mean, white-noise processes. The error-performance surface of the filter is obtained by taking into consideration several values of correlation matrix of process and measurement noise, and the experimental results show a satisfactory improvement in the signal-to-noise ratio of the system. © 2010 IEEE. Source

Rodriguez J.C.,Autonomous University of Baja California | Sergiyenko O.Y.,Autonomous University of Baja California | Tyrsa V.V.,Technical University Baja California | Basaca L.C.,Autonomous University of Baja California | Hipolito J.I.N.,Autonomous University of Baja California
Pan American Health Care Exchanges, PAHCE 2011 - Conference, Workshops, and Exhibits. Cooperation / Linkages: An Independent Forum for Patient Care and Technology Support | Year: 2011

Medical practitioners have traditionally used manual anthropometric meters and X-Ray to monitor the development and treatment of orthopedic diseases as scoliosis. With the disadvantage of generating uncertainty results in the manual methods, also X-Ray radiation can be the cause of several diseases after a long exposure. This is the reason why we developed a new method, noninvasive, without harmful radiation to human beings, assisting in monitoring the treatment of orthopedic diseases such as scoliosis. The following article presents the theoretical performance and experimental results of measurements already made with the new proposed system. © 2011 IEEE. Source

Burtseva L.,Autonomous University of Baja California | Pestryakov A.,Tomsk Polytechnic University | Romero R.,Technical University Baja California | Valdez B.,Autonomous University of Baja California | Petranovskii V.,National Autonomous University of Mexico
Advanced Materials Research | Year: 2014

This paper summarize idealized theoretical studies of bicomponent particle packing parameters, affecting the phase and pore structure of the obtained materials. Such a kind of analysis can be used both in theoretical consideration of material engineering problems and in the chemical industry. The effects of key variables on the relationship between packing fraction and particle size are re-examined for general application. Potential applications of these results include synthesis of nanomaterials, adsorbents, catalyst carriers and packing for chromatographic columns. Directions for future research are suggested. © (2014) Trans Tech Publications, Switzerland. Source

Valdez B.,Autonomous University of Baja California | Schorr M.,Autonomous University of Baja California | Quintero M.,Autonomous University of Baja California | Garcia R.,Autonomous University of Baja California | Rosas N.,Technical University Baja California
Corrosion Engineering Science and Technology | Year: 2010

The hydraulic infrastructure is constituted by the assets of two central elements: water supply and energy generation facilities. This study deals with the durability of the structures and their engineering materials. Four vital parts of this infrastructure were selected: dams, canals, aqueducts and hydroelectric stations, which are built of two basic materials; steel and concrete. The global climate change and warming and the greenhouse - gas emissions (all interrelated complex phenomena) affect these construction materials and structures, mainly by their extreme events such as torrential rains and flooding, dry and wet seasons, high and low humidity and solar radiation. This study presents a general global approach to the climate influence on the durability of those materials and structures and concludes with a description of a particular region: a section of the 'Great American Desert' on the Mexico-USA border. © 2010 Institute of Materials, Minerals and Mining. Source

Ramos R.,Autonomous University of Baja California | Zlatev R.K.,Autonomous University of Baja California | Stoytcheva M.S.,Autonomous University of Baja California | Valdez B.,Autonomous University of Baja California | And 2 more authors.
ECS Transactions | Year: 2010

A noise suppression approach was developed and applied for pitting corrosion studies of chromatized 6061-T6 airspace aluminum alloy by Scanning Vibrating Electrode Technique (SVET). The proposed approach is based on the power line frequency application as a SVET probe driving frequency combined with a synchronized double integration of the SVET probe signal yielding a free of noise signal product. Noise suppression up to -58 dB was achieved allowing precise measurement of the ionic current above the corroded metal surface proving the opportunity to replace the high cost lock-in amplifier. ©The Electrochemical Society. Source

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