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Performance Analysis of Free Space Optical Link Under Various Attenuation Effects
Issue:
Volume 7, Issue 2, June 2018
Pages:
43-47
Received:
17 December 2017
Accepted:
8 January 2018
Published:
27 March 2018
Abstract: Free Space Optics (FSO) is useful where a fiber optic cable is impractical. It is similar to fiber optic communications in that data is transmitted by modulated laser light. Instead of containing the pulses of light with in a glass fiber, these are transmitted in a narrow beam through the atmosphere. This article discusses the main architectural details of the FSO communication system.. The major FSO Parameters discussed are wavelength selection, features of different wavelength windows and optical channel model. The article investigates the Performance of Free Space Optical Link under Various Attenuation Effects like rain, fog using Optiwave.
Abstract: Free Space Optics (FSO) is useful where a fiber optic cable is impractical. It is similar to fiber optic communications in that data is transmitted by modulated laser light. Instead of containing the pulses of light with in a glass fiber, these are transmitted in a narrow beam through the atmosphere. This article discusses the main architectural de...
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Development of a Modular Biopotential Amplifier Trainer for Biomedical Instrumentation Laboratory Experiments
Saiful Islam Khan,
Fakrul Islam Tushar,
Md. Amirul Islam Rokan,
Rupu Chowdhury
Issue:
Volume 7, Issue 2, June 2018
Pages:
48-59
Received:
20 February 2018
Accepted:
8 March 2018
Published:
29 March 2018
Abstract: This paper presents the design, development and implementation of a reconfigurable low-cost biopotential amplifier trainer module (RTR module) and quantitative analysis of the students’ compatibility with the trainer module. The trainer module can measure Electrocardiogram (ECG), Electroencephalogram (EEG) and Electromyogram (EMG) biopotential signals by reconfiguring the module using the basic circuit and filtering blocks. Given hand on experience, the module is designed and implemented in such reconfigurable manner that the students can avoid, disconnect and add any filtering blocks to understand the effect of these filters to the biopotential signals. The laboratory experience is an important component of the learning process. The RTR module is a low cost and compact educational tool. With this RTR module, the students should be able to recognize the biopotential signals and the acquisition methods in an intuitive and easy way, allowing them to improve their skills of designing biomedical instrumentation.
Abstract: This paper presents the design, development and implementation of a reconfigurable low-cost biopotential amplifier trainer module (RTR module) and quantitative analysis of the students’ compatibility with the trainer module. The trainer module can measure Electrocardiogram (ECG), Electroencephalogram (EEG) and Electromyogram (EMG) biopotential sign...
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Research on Reactive Power Compensation Optimization of 35kV Three Phase Unbalanced Distribution Network System
Issue:
Volume 7, Issue 2, June 2018
Pages:
60-67
Received:
16 April 2018
Accepted:
2 May 2018
Published:
22 May 2018
Abstract: In view of the actual situation of three-phase load unbalance in distribution power system, a three-phase load balancing compensation method for three-phase-and-three-wire systems in distribution network is proposed, and load model is established. Then I have deduced the mathematical model of three-phase load compensation in distribution network, and analyzed the energy loss of the two kinds of compensation method about the power supply and the dispersion compensation on the load spot. It is verified that the load end compensation can contribute more to the reduction of energy loss, under the premise of ensuring active load, possess more economical, this method has important significance for the solution in research on reactive power compensation optimization of three phase unbalanced distribution power network.
Abstract: In view of the actual situation of three-phase load unbalance in distribution power system, a three-phase load balancing compensation method for three-phase-and-three-wire systems in distribution network is proposed, and load model is established. Then I have deduced the mathematical model of three-phase load compensation in distribution network, a...
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Use of a Hysteresis Loop Activation Function to Enable an Analog Perceptron to Gain Memory
William Brickner,
Muhammad Sana Ullah
Issue:
Volume 7, Issue 2, June 2018
Pages:
68-73
Received:
17 May 2018
Accepted:
14 June 2018
Published:
10 July 2018
Abstract: With the advent of memristors, analog artificial neural networks are closer than ever. Neural computing is growing as a topic of research. In the context of analog artificial neural networks, the purpose of this research is to verify that a perceptron could gain a discrete memory from implementing a hysteresis loop in the activation function. The discrete memory is represented by the difference path of the hysteresis activation function that took from logic 1 to logic 0. To write to the memory, the input to the hysteresis loop would have to exceed threshold. To read the stored value, the input would have to be between the thresholds of the hysteresis function. In order to verify the perceptron’s memory, a network with manually chosen weights is selected which acts as a shift register. The components of this network are assembled in a circuit simulation program. Functionally, the network receives two inputs: a data signal and an enable signal. The output of the network is a time-shifted version of previous input signals. A system whose output is a time-shifted version of the previous inputs is considered to have memory.
Abstract: With the advent of memristors, analog artificial neural networks are closer than ever. Neural computing is growing as a topic of research. In the context of analog artificial neural networks, the purpose of this research is to verify that a perceptron could gain a discrete memory from implementing a hysteresis loop in the activation function. The d...
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