In this paper, we revisit the energy-based swing-up control problem for a rotational pendulum. Different from the existing energy-based control solution, first, we present a necessary and sufficient condition for avoi...
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Soft set theory proposed by Molodstov is a general mathematic tool for dealing with uncertainties. Recently, several algorithms had been proposed for decision making using soft set theory. However, these algorithms st...
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Mining weighted based association rules has received a great attention and consider as one of the important area in data mining. Most of the items in transactional databases are not always carried with the same binary...
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Rate adaptation in wireless LANs is to select the most suitable transmission rate automatically according to channel condition. If the channel condition is good, a station can choose a higher transmission rate, otherw...
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Semiconductor lasers are the integral parts of optical communication systems. The temperature dependence of the lasing wavelength of a laser is an important issue because it is used in different environment with varyi...
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ISBN:
(纸本)9789898425690
Semiconductor lasers are the integral parts of optical communication systems. The temperature dependence of the lasing wavelength of a laser is an important issue because it is used in different environment with varying thermal conditions. In this paper, a comparative study of the temperature dependence of lasing wavelength of two types of laser diode has been presented. The comparison was made between an InGaAsP/InP stripe geometry edge-emitting laser and vertical cavity surface emitting laser (VCSEL) with GaAs in the active region. For both cases, the temperature dependence was observed for different heat sink temperatures ranging from 20℃ to 50℃ at an interval of 5℃ for an operating current of 0.763A and 1.88mA respectively. The lasing wavelength shifts for stripe laser and VCSEL have been found to be 0.3nm/K and 0.06nm/K respectively. VCSEL exhibits significantly greater thermal stability than stripe laser. The result has also been elucidated with a comprehensive theoretical excerpt.
The two-degrees-of-freedom optimal servo control systems have advantages that the integral gain can be tuned for improving feedback properties such as disturbance attenuation properties, while tracking property is ind...
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Extraction of road region is a core technology for an autonomous vehicle which achieves safer transport. We propose extraction and modeling method for the road region in front of vehicle, using three-dimensional shape...
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This paper presents an investigation on how different walking surfaces affect gait identification based on accelerometer data. Accelerometer data of 5 subjects walking on 4 different solid surfaces was acquired on 3 d...
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This paper presents an investigation on how different walking surfaces affect gait identification based on accelerometer data. Accelerometer data of 5 subjects walking on 4 different solid surfaces was acquired on 3 different days by a cell phone placed on the subject's hip. Data analysis detects gait cycles by a method based on wavelet transform. For all gait cycles, features were calculated by using higher-order statistics. Similarity estimation for discerning the different subjects and surfaces was introduced by using principal component analysis (PCA). It proved that the different solid surfaces do not influence the efficiency of the identification of subjects based on their gait.
This paper presents an alternative feature ranking technique for Traditional Malay musical instruments sounds dataset using rough-set theory based on the maximum degree of dependency of attributes. The modeling proces...
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We have proposed the concept of a presence sharing system Ghatcha [GHost Avatar on a Telework CHAir] in which the users' embodiment is not indicated by the avatars but by the chairs that suggest the presence of av...
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