Frequency-Preserved Acoustic Diode Model with High Forward-Power-Transmission Rate

Vehicular ad hoc network (VANET) is a self-organized, multi-purpose, service-oriented communication network that enables communication between vehicles and between vehicles and roadside infrastructures for the purpose of exchanging messages. In a dense traffic scenario, the message traffic may generate a load higher than the available capacity of the transmission medium leading to channel congestion problem. This situation leads to a rise in packet loss rates and transmission delay. Some existing congestion control schemes adapt the transmission power, transmission rate, and contention window parameters by making comparison with neighboring values through classical logic. However, the approach does not consider points between two close parameter values. This work uses fuzzy logic to improve the adaptation process of the network contention window parameter. The proposed scheme achieved a 15% higher in-packet delivery ratio and 10ms faster transmission compared with related work in terms end-to-end delay.

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Geometric Progression Application in Design Transmission Gear Ratio

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.776.343 ◽

2015 ◽

Vol 776 ◽

pp. 343-348

Author(s):

A.A.I.A. Sri Komaladewi ◽

I. Gusti Agung Kade Suriadi ◽

I. Ketut Adi Atmika

Keyword(s):

Power Transmission ◽

Transmission Rate ◽

Rolling Resistance ◽

Gear Ratio ◽

Geometric Progression ◽

Vehicle Speed ◽

Distance Curve ◽

Wind Resistance ◽

Rate Transmission ◽

Transmission Gear

One of the important aspects in determining the competitiveness of an automotive product is the traction ability or performance, the vehicle's ability to accelerate, wind resistance, rolling resistance, against the force of the ramp, and the capacity to pull a load. The size of traction for any level of gear and vehicle speed that can be achieved can be controlled by adjusting the ratio and transmission rate. Transmission ratio affects the amount of torque that can be transmitted, while the number of speed levels affects the fineness of the process of transmission and transformation of power in the transmission system. To find a gear ratio between the lowest and highest transmission rate is by geometric progression. The basis of the use of this method is to get the ratio and amount of gear transmission rate of speed at the same engine operating speed so that fuel economy will be the same on each transmission. Modified gear ratio produce traction curve where the distance curve closer adjacent transmission. This indicates a loss of power transmission shifting is getting smaller or in other words the better traction performance. The design of the installation ratio 6-speed, generating traction curve with the distance between the curve near the sting traction, produces good traction or good performance.

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A NOMA-Combined Hybrid Approach for SDMA Improvement in Wireless Powered Communication Networks

Wireless Personal Communications ◽

10.1007/s11277-021-08930-1 ◽

2021 ◽

Author(s):

Juhyun Maeng ◽

Mwamba Kasongo Dahouda ◽

Inwhee Joe

Keyword(s):

Communication Networks ◽

Mobile Communications ◽

Power Transmission ◽

Transmission Rate ◽

Hybrid Approach ◽

Access Point ◽

A Cell ◽

Distance Difference ◽

The One ◽

To Receive

AbstractWireless Powered Communication Network (WPCN) consists of Hybrid Access Point (HAP) that performs power transmission and data collection at the same time, and multiple nodes that can transmit data. In WPCN, depending on the wireless communication environment, the nodes cannot be able to transmit data because they can fail to receive power. Hence, increasing the transmission rate under a given resource is one of the very important issues. In ordinary mobile communications, a cell is divided into several sectors and the data is collected through multiple antennas to increase the transmission rate using SDMA. As a result, if the number of nodes in the one sector increases, the interference between nodes increases, and the transmission rate may decrease. Accordingly, in order to maximize performance, the number of nodes that can exist in a sector must be limited. The transmission rate between nodes according to the distance difference may not be fair because the nodes far from the HAP charge a small amount of power by attenuation of the signal, and the nodes close to the HAP charge a relatively large amount of power. Therefore, we propose Hybrid SDMA and Non-Orthogonal Multiple Access (NOMA) as a way to maximize the performance in term of both Sum-Throughput and Fairness. Also, we prove that there is a tradeoff between Sum-Throughput and Fairness according to the number of sectors. The simulation results show that the Hybrid SDMA and NOMA improves the performance substantially compared to the conventional SDMA.

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Wireless Power and Signal Transmission Based on Time-sharing Multiplexing for WPT System

E3S Web of Conferences ◽

10.1051/e3sconf/202125201023 ◽

2021 ◽

Vol 252 ◽

pp. 01023

Author(s):

Xiaorui Wu ◽

Wenlan Gong ◽

Jing Xiao ◽

Shaonan Chen ◽

Ning Wu

Keyword(s):

Power Transmission ◽

Transmission Rate ◽

Signal Transmission ◽

Transmission Efficiency ◽

Wireless Transmission ◽

Transmission Time ◽

Time Sharing ◽

Wireless Power ◽

Practical Applications ◽

The Relationship

In wireless power transfer (WPT) systems, wireless transmission of signals is particularly important for some practical applications. An effective approach of signal and energy synchronous transmission based on time-sharing multiplexing of the same coupled coil is proposed in this paper. Using the same coupled coil, the signal transmission is carried on when interruption of power transmission happens. To realize the proposed method, the relationship between power transmission time and signal transmission time is provided to obtain the optimal transmission process of the power and signal. Besides, the power transmission efficiency (PTE) and the signal transmission rate (STR) are analyzed. Finally, the effectiveness of the proposed method is verified by the experiment.

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Interfacing of a TEM/STEM System to a Computer

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100097818 ◽

1981 ◽

Vol 39 ◽

pp. 250-251

Author(s):

P. Hagemann

Keyword(s):

Image Analysis ◽

Transmission Rate ◽

Analytical Electron Microscopy ◽

Signal Beam ◽

Automated Image Analysis ◽

Beam Deflection ◽

External Control ◽

Computer Input ◽

Instrument Control ◽

Data Acquisition And Processing

The use of computers in the analytical electron microscopy today shows three different trends (1) automated image analysis with dedicated computer systems, (2) instrument control by microprocessors and (3) data acquisition and processing e.g. X-ray or EEL Spectroscopy.While image analysis in the T.E.M. usually needs a television chain to get a sequential transmission suitable as computer input, the STEM system already has this necessary facility. For the EM400T-STEM system therefore an interface was developed, that allows external control of the beam deflection in TEM as well as the control of the STEM probe and video signal/beam brightness on the STEM screen.The interface sends and receives analogue signals so that the transmission rate is determined by the convertors in the actual computer periphery.

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