scholarly journals The Future Electrical Multiplexing Technique for High Speed Optical Fibre

2017 ◽  
Author(s):  
Rahmat Talib ◽  
Mohammad Faiz Liew Abdullah
Keyword(s):  
Optical Fibre ◽  
High Speed ◽  
The Future

A Wavelength Interleaved DWDM ROF System with 60GHz Optical OFDM Signal

2011 ◽  
Vol 130-134 ◽  
pp. 2245-2248
Author(s):  
Yong Hong Ma ◽  
Chong Xiang Zhang ◽  
Pan Zhang
Keyword(s):  
High Speed ◽  
Radio Over Fiber ◽  
Experimental Results ◽  
Arrayed Waveguide Grating ◽  
Waveguide Grating ◽  
Access System ◽  
Ofdm Signal ◽  
The Future ◽  
Optical Ofdm ◽  
Arrayed Waveguide

we demonstrate a wavelength interleaved DWDM Radio-over-Fiber (ROF) system for providing 1-Gb/s OFDM signal in downlink and 1-Gb/s OOK data in uplink simultaneously. In this scheme, we use only one arrayed waveguide grating device at the remote node to realize both the de-multiplexing and multiplexing functions. The experimental results demonstrate that this scheme is feasible to the future broadband high-speed OFDM-ROF access system.

Investigation of Ventilation Monitoring and Controlling System for Supercavitation Experiment in the Water-Tunnel Based on Configuration Software

2014 ◽  
Vol 556-562 ◽  
pp. 3219-3222
Author(s):  
Shan Shan Li ◽  
Peng Wang ◽  
Xu Han ◽  
Jin Feng Liu ◽  
Xiao Gang Zhou
Keyword(s):  
High Speed ◽  
Configuration Software ◽  
Water Tunnel ◽  
Controlling System ◽  
Ventilation Monitoring ◽  
The Future ◽  
Numerous Data ◽  
And Control ◽  
Monitor And Control

The supercavitation weapon is a new concept weapon moving at a high speed underwater, which is devised applying the characteristic of supercavitation reducing the resistance of water, and it may be widely used in the future. The present ventilating system has many shortcomings, such as less automation and numerous data cannot be measured and recorded timely. In this paper, the automatic monitor and control ventilating system of supercavitation water-tunnel was developed using configuration software and PLC. All parameters can be measured, recorded and displayed automatically via using of the system. It has many advantages such as higher automation, convenience, and easy maintenance.

RESOURCE SAVING IN THE EXTRACTION OF NON-FERROUS METALS

2021 ◽  
Vol 4 (1) ◽  
pp. 313-322
Author(s):  
V.I. Golik ◽  
Keyword(s):  
High Speed ◽  
Resource Saving ◽  
Ferrous Metals ◽  
The Future ◽  
Tech Nologies ◽  
Non Ferrous Metals

The main directions of resource saving in the extraction of non-ferrous metals in Rus-sia are considered, the basis of which is the extraction of the useful component by leaching in underground blocks, piles and high-speed disintegrator mills. The current ideas about the problem are systematized and investigated, and a forecast of the use of resource-saving tech-nologies in the future is given.

scholarly journals Gas Turbine Train Development in France

1975 ◽  
Author(s):  
M. R. Garde
Keyword(s):  
Diesel Engine ◽  
Gas Turbine ◽  
High Speed ◽  
Rolling Stock ◽  
Lightweight Construction ◽  
The Future ◽  
Railway Traction ◽  
Aircraft Type ◽  
Very High

This paper presents a discussion on aircraft type gas-turbine train development. For railway traction purposes, the turbo-engines used on aircraft would improve the quality of the services provided in the electrified lines. The gas turbine should insure high speed and satisfactory acceleration. It would enable relatively lightweight construction to be carried out and run at a higher speed than trains on non-electrified lines. The gas turbine will not completely replace the diesel engine, but it will enable rolling stock to be constructed for which the diesel is unsuitable, especially in the case of high-speed, lightweight trainsets and, in the future, very high-powered units.

A Validation Study of the Mixed-Foil Concept for High-Speed Hydrofoils

1976 ◽  
Vol 20 (02) ◽  
pp. 85-94
Author(s):  
D. P. Wang ◽  
Young T. Shen
Keyword(s):  
Validation Study ◽  
High Speed ◽  
High Speeds ◽  
Supercavitating Flow ◽  
The Future

A hydrodynamic validation study of the concept of the mixed foil has been conducted. A mixed foil is a streamlined hydrofoil equipped with a flap or other device which, above a certain speed, can be activated so as to change the flow around the foil into a supercavitating flow. At take-off and at moderate speeds, a mixed foil is operated as a subcavitating foil; at high speeds, it is operated as a supercavitating foil. During high-speed operations, a reduction in the wetted planform area of a mixed foil is proposed. The present study produces a design outline for the mixed foil and identifies essential problems which should be studied in the future. The analysis is illustrated by using hydrofoils with plano-convex sections. The lift-to-drag ratios at takeoff and at 45-knot and 83-knot cruising speeds are obtained.

Research on error-correction algorithm of high-speed QKD system based on FPGA

2019 ◽  
Vol 17 (02) ◽  
pp. 1950013
Author(s):  
Shi-Biao Tang ◽  
Jie Cheng
Keyword(s):  
Error Correction ◽  
Quantum Key Distribution ◽  
High Speed ◽  
Information Leakage ◽  
Correction Algorithm ◽  
Performance Limit ◽  
Performance Requirement ◽  
The Future ◽  
Field Programmable ◽  
Error Correction Algorithm

In the process of quantum key distribution (QKD), error correction algorithm is used to correct the error bits of the key at both ends. The existing applied QKD system has a low key rate and is generally Kbps of magnitude. Therefore, the performance requirement of data processing such as error correction is not high. In order to cope with the development demand of high-speed QKD system in the future, this paper introduces the Winnow algorithm to realize high-speed parity and hamming error correction based on Field Programmable Gate Array (FPGA), and explores the performance limit of this algorithm. FPGA hardware implementation can achieve the scale of Mbps bandwidth, with choosing different group length of sifted key by different error rate, and can achieve higher error correction efficiency by reducing the information leakage in the process of error correction, and improves the QKD system’s secure key rate, thus helping the future high-speed QKD system.

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