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Domain adaption tends to transfer knowledge across domains following dissimilar distribution and where target domain has inadequate labelled samples. When knowledge is transferred from abundantly irrelevant sources negative transfer may occur resulting in poor classification of test samples. Deep learning research illustrates the semantic clustering as well as transferability of deep convolutional...
High Peak to Average Power Ratio (PAPR) is one of the major drawbacks for Orthogonal Frequency Division Multiplexing (OFDM) transmitted signal. Among the PAPR reduction techniques, Selected Mapping (SLM) technique is one of the promising one but results in added computational complexity. In this paper, we applied Greatest Common Divisor (GCD) sequence based SLM method using our proposed reverse searching...
This paper presents optimization of various parameters of carbon nanotube field effect transistor (CNFET) based op amp in sub-10 nm node for high frequency operation. Parameters such as, channel length, gate oxide thickness, gate dielectric constant, spacer doping, spacer dielectric constant and pitch, are optimized. For high frequency operation of op amp, optimum values of CNFET parameters are found...
Osteoporosis is one of the most notable causes of bone fracture and approximately 200 million women are affected by osteoporosis worldwide. According to a report of International Osteoporosis Foundation, at least one in five men and one in three women in Bangladesh suffer a bone fracture due to osteoporosis in their remaining lifetime. Limited data is available in the open literature on osteoporosis...
This paper proposes a utility supply driven single stage PFC based LED driver using Cúk converter. For low DC voltage output requirement of LED driver, Cúk converter is a convenient choice due to its topological suitability for PFC application and stepping the voltage down at a desired level unlike the Boost Converter. A hysteresis current control scheme is adopted to operate the converter in Continuous...
Considering the practical significances, handwriting recognition is getting an intense interest to the research community. Through, several studies have been conducted for Bengali handwriting recognition, a robust model for Bengali numerals classification is still due. Therefore, a hybrid model is presented in this paper, which aims to classify the Bengali numerals more precisely. The proposed model...
In this work, Electrostatic and transport characteristics of symmetric double gate n-channel junctionless transistor have been investigated through numerical simulation. A 1-D self consistent analysis of coupled Schrodinger-Poisson equation has been performed. Channel mobile charge density has been obtained and studied for variations in device dimensions and biasing voltages. A simplified ballistic...
A new direct power control (DPC) approach for a voltage source inverter (VSI) based three-phase grid-connected solar photovoltaic (PV) system is proposed in this paper. The proposed DPC is designed using the nonlinear backstepping control scheme based on the power dynamics rather than the conventional dp current dynamics. As a result, the inner current control loop is eradicated in this paper which...
The IEEE 802.15.4 standard for the Low Rate Wireless Personal Area Networks (LR-WPANs)is popular and widely used for many areas of applications. The standard uses slotted CSMA/CA protocol in it's contention access period (CAP) in the beacon enabled mode. The protocol adopted a Binary Exponential Backoff (BEB)algorithm. In this paper, we investigate the saturation throughput of this standard using...
Differentiating channel access probability based on only traffic priority can ensure QoS statistically in enhanced distributed channel access (EDCA) of IEEE 802.11e. However, it may seriously affect the overall performance in presence of degraded channel condition among distant stations. In this paper, we propose a novel channel access scheme which exploits the benefit of cooperative communication...
Feature selection from facial regions is a well-known approach to increase the performance of 2D image-based face recognition systems. In case of 3D modality, the approach of region-based feature selection for face recognition is relatively new. In this context, this paper presents an approach to evaluate the discrimination power of different regions of a 3D facial surface for its potential use in...
It is very difficult, if not impossible, to obtain a clean reference signal of a noisy speech recorded in a practical environment. As a result, intrusive methods that evaluate the quality of speech signal with the help of a clean reference signal has little value in real world applications. In this paper, we investigate the effectiveness of data-driven non-intrusive method for assessing quality of...
An analytical approach is developed to evaluate the carrier to noise ratio and bit error rate of a free space optical link with RF subcarrier modulation taking into account the effect of weak atmospheric turbulence which is modeled as log-normal distribution. A close form expression for the carrier to noise ratio conditioned on a given turbulence at the output of a direct detection is developed. Average...
CdTe is recognized as leading solar cell for having the feature of low cost, high efficiency and better cell stability. The BSF strategy below the absorber layer of CdTe solar cell showed the possibility of higher power conversion efficiency. In this research work, Copper Telluride (Cu2Te) BSF is used to explore the hidden potentiality of CdTe solar cell at ultra-thin level. It was investigated that...
An improved algorithm for MTPA (Maximum Torque Per Ampere) and Field Weakening operation which is suitable for implementation with Field Oriented Control, has been proposed for the Synchronous Reluctance motor (SynRel) for high dynamic performance. The proposed method overcomes the problem of excessive current flow into the machine while generating the d-axis and q-axis current commands independently...
In this paper, a new method is proposed for 100% protection against the stator earth fault in synchronous generator. Conventional ground fault protection schemes can be applied to any generator but it covers at most 95% of generator stator length. For ensuring 100% protection of synchronous generator stator winding, conventional ground fault schemes are combined with our proposed third harmonic differential...
The optical properties of one dimensional (1D) structures are dominated by the excitonic behaviour which are formed by optical absorption. The excitonic properties in III-nitride based cylindrical quantum wires (QWRs) have been investigated theoretically. The confinement of the electron and the hole is subjected for the peculiarities of the exciton in a QWR where confinement of the particles can be...
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