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Activity recognition is an important subject with many applications in health care, emergency care, and assisted living. Nowadays, activity information can be acquired using small accelerometers connected to the body, including the ones available in smartphones. In this study, we assessed the influence of autoregressive model parameters or features on activity detection or classification. Our results...
In this article, the thermal expansion effect is considered as the main cause of the gradual shift in the forcedisplacement relationship, which describes the operation of Pneumatic Artificial Muscles (PAMs). A modified static force modeling approach is proposed, based on fundamental PAM modeling techniques, while incorporating the geometrical properties that are being affected by the thermal build-up...
With the explosive growth of video data, content-based video analysis and management technologies such as indexing, browsing and retrieval have drawn much attention. Video shot boundary detection (SBD) is usually the first and important step for those technologies. Great efforts have been made to improve the accuracy of SBD algorithms. However, most works are based on signal rather than interpretable...
This paper presents an improved parameter extraction algorithm for photovoltaic (PV) panels based on only datasheet value, which is very useful in the development phase of power conditioning system (PCS). In order to increase the accuracy of PV circuit model especially in the maximum power point (MPP), optimization method with objective function incorporating only the MPP conditions was suggested...
In this paper, a mixed algorithm is proposed to improve SOC estimation accuracy for large-capacity Li-ion battery by using advantages of coulomb counting method, DCIR reset method, and enhanced OCV reset method. Because each method has drawbacks of accumulated SOC error during the operation in EVs, the optimal mixed algorithm is presented. Also, the weighted current value IDC based on the mathematical...
Isotope separation columns are complex plants, with numerous input and output variables. Accurate but still simple mathematical models are necessary both in analysis and synthesis. The present paper deals with the mathematical model of the 18O separation column based on isotopic exchange between nitric oxides-nitric acid, operated at total reflux. The simulation results proves good accuracy.
In this paper we investigate thermal network models with different model orders applied to various Dutch low-energy house types with high and low interior thermal mass and containing floor heating. Parameter estimations are performed by using data from TRNSYS simulations. The paper discusses results in relation to model order and the order which yields a sufficient level of accuracy is determined...
This paper proposes a passive islanding detection technique for distributed generations in grid-connected microgrids and presents a comprehensive comparative analysis of intelligent classifiers for passive islanding detection application. The proposed method utilizes pattern recognition techniques in classification of underlying signatures of wide variety of system events on critical system parameters...
In this paper we present a mathematical model of spacecraft motion with an electric propulsion engine in an irregular non-spherical gravitational field. We propose to use the suggested model of single gravity points for simulation of the motion of a spacecraft in an irregular gravitational field. A deviation of the developed model from the model of gravitational potential in spherical harmonics was...
A novel method calculates deterministically the power-peak voltage of a photovoltaic (PV) panel. It requires only three measurements, which are the output current, terminal voltage and temperature of the PV. With low-computational complexity, this method can be implemented on 16-bit low-cost microcontrollers. Some simulations confirm the accuracy and robustness of this method.
In order to calculate the RSSI of the virtual reference tags accurately, this paper proposes a method that based on log-distance path loss model. Add some real reference tags in the original layout, read the RSSI of real reference tags twice in a short time interval to calculate the path loss exponent and the average environmental impact value nearby tags by using the model. The virtual reference...
Accurate indoor positioning of mobile users is a crucial operation for location aware computer applications. However, the complex and nonstationary propagation characteristics of indoor environments and the large number of different mobile devices make difficult to employ classical geometrical approaches. In this work we examine the application of sequential Bayesian approaches to this problem and...
This study aims to predict the medium-term electricity load demand of Thailand using the generalized estimating equation and the linear mixed effect model. The electricity load demand data for the past 12 years (2001 to 2012) are analyzed. It is found that both the methods yield predictive values approximating actual values. However, a comparison in terms of efficiency demonstrates that the generalized...
This paper presents a comparative study on the use of interpolation based gaze estimations with low-cost web camera with built in infrared LEDs. Six polynomial models were carefully compared based on at 9 points calibration; the best average accuracy from this study among all participants is found to be 1.10 degree from the center of gaze line. The best model provides better quality when compared...
Hand detection can be used for human computer interaction (HCI) and has many methods that use to detect the hand image. Skin color detection is one of the methods however there are many types of color model with threshold optimization problem. This paper proposes an Ensemble Threshold Segmentation method (ETS) to improve the segmentation technique. The ETS was implemented to optimize threshold of...
The article describes the numerical modeling of the problem of determining the spatial coordinates of the fire seat by multipoint electro-optical system. The algorithm for determining the spatial coordinates of the seat of fire based on Newton's method is proposed. The results of testing the algorithm on the basis of theoretically obtained initial data for three-dimensional protected object are represented...
This paper presents a semi-empirical model of the mobile charge in the channel of a junctionless dual-gate MOSFET. Its accuracy has been demonstrated to be better than 1% of the total depletion charge for a wide range of channel thickness and substrate doping values.
With the popularity of service-oriented architecture, many web systems have been developed in form of composite services. Since the performance of these composite services highly depends on Quality of Service (QoS) of employed atomic web services, it is important to predict the QoS values of atomic web services with high accuracy. Although collaborative filtering based approaches have recently been...
Identifying the mentor and the mentee in the online community is very difficult because of the hidden or lacking personal characteristics but it is very important for the organization. The new members in the organization probably will not only require the knowledge explicitly from their colleagues in the same department, but also the implicit knowledge from online community. The mentor and the mentee...
Prognostics and health management has become a subject of great interest to many electrical systems. However, the lithium-ion batteries are a core component of many machines and critical to system's functional capabilities. Remaining useful life prediction is central to the PHM of the lithium-ion batteries. The remaining useful life of lithium-ion batteries is defined as length of time from current...
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