المؤلفون: YANG, SHUFANG, LIU, YUANJIAN, LI, SHUANGDE

المصدر: DEStech Transactions on Computer Science and Engineering; International Conference on Computer Intelligent Systems and Network Remote Control (CISNRC 2019) ; 2475-8841

مصطلحات موضوعية: Path Loss,Wave Propagation, Indoor Office Environment, Millimeter Wave.Text

الوصف: In this paper, the method of shooting and bounding ray tracing/image (SBR/IM) is used in the simulation of indoor office environment, with which the study on millimeter-wave propagation characteristics can be processed well. Through simulation parameters such as path loss, received power and root mean square (RMS) delay spread is obtained and analyzed. All the results of this paper could be used as a reference when setting the position of transmitter and selecting parameters in indoor office environments.

العلاقة: https://www.dpi-journals.com/index.php/dtcse/article/view/33348Test

الإتاحة: https://doi.org/10.12783/dtcse/cisnrc2019/33348Test
https://www.dpi-journals.com/index.php/dtcse/article/view/33348Test

المؤلفون: FANG, XINXIN, ZHOU, JINCHENG, WANG, XUETIAN

المصدر: DEStech Transactions on Computer Science and Engineering; International Conference on Computer Intelligent Systems and Network Remote Control (CISNRC 2019) ; 2475-8841

مصطلحات موضوعية: Radio Wave Propagation, Path Loss, Propagation Gap.Text

الوصف: This paper analyzes the wireless transmission path model in mountainous environments. Diffraction propagation is the main method of electromagnetic wave propagation in mountainous environment. This paper first analyzes the mountain diffraction loss model based on fresnel integral and discusses the expansion formula of fresnel integral, and applies the range to single peak diffraction formula and double diffraction. Last discussed the relationship between the frequency, distance and height of radio wave propagation when the receiver sensitivity is 150dB, and finally the establishment of the diffraction model, which improves the process of radio wave prediction effectiveness.

العلاقة: https://www.dpi-journals.com/index.php/dtcse/article/view/33298Test

الإتاحة: https://doi.org/10.12783/dtcse/cisnrc2019/33298Test
https://www.dpi-journals.com/index.php/dtcse/article/view/33298Test

المؤلفون: BASHKUEV, Yuri, DEMBELOV, Mikhail

المصدر: DEStech Transactions on Computer Science and Engineering; International Conference on Wireless Communication and Network Engineering (WCNE 2016) ; 2475-8841

مصطلحات موضوعية: Surface Electromagnetic Wave (SEW), Attenuation function, Surface impedance, Sea ice, Sea water, Radio wave propagation

الوصف: The article demonstrates that the conditions of LF-MF-HF radio wave propagation over the “ice-sea†structure with highly inductive impedance are more favorable than over the sea without ice because of the appearance of surface electromagnetic waves (SEW). It was determined that the conditions of radio wave propagation over ice paths depend on a frequency, ice thickness and distance from the transmitter within the 100 kHz – 5 MHz range on the paths with ice thickness from 0.6 to 2.7 meters.

العلاقة: https://www.dpi-journals.com/index.php/dtcse/article/view/5118Test

الإتاحة: https://doi.org/10.12783/dtcse/wcne2016/5118Test
https://www.dpi-journals.com/index.php/dtcse/article/view/5118Test

المؤلفون: ZHENG, Na

المصدر: DEStech Transactions on Computer Science and Engineering; 2nd International Conference on Software, Multimedia and Communication Engineering (SMCE 2017) ; 2475-8841

مصطلحات موضوعية: Radio wave propagation, Field strength coverage, Electromagnetic compatibility analysis, Propagation model

الوصف: Radio wave propagation prediction can calculate the radio frequency link parameters such as field strength coverage and reception of power, which is an important foundation of electromagnetic compatibility (EMC) analysis and frequency coordination. This paper reviews the advances in the research of radio wave propagation by the International Telecommunication Union (ITU) and the International Radio Science Consortium (USRI), analyzes the core influencing factors related to the propagation of radio waves, including the propagation environment and the propagation model used in the calculation which EMC analysis system has been verified. The related content can provide reference for electromagnetic compatibility analysis and the border coordination.

العلاقة: https://www.dpi-journals.com/index.php/dtcse/article/view/12429Test

الإتاحة: https://doi.org/10.12783/dtcse/smce2017/12429Test
https://www.dpi-journals.com/index.php/dtcse/article/view/12429Test

المؤلفون: ARTEMENKO, Alexey A., ASOTOV, Dmitry V., MATVEEV, Boris V., OSTANKOV, Aleksandr V., SALNIKOVA, Alexandra V.

المصدر: DEStech Transactions on Environment, Energy and Earth Sciences; 3rd International Conference on Green Materials and Environmental Engineering (GMEE 2017) ; 2475-8833

مصطلحات موضوعية: Geometrical optics, Incident ray, Reflected ray, Fast ray tracing, Simulation of radio-wave propagation processes

الوصف: We consider the problem of the computer-aided construction of geometrical optics electromagnetic wave propagation paths (ray tracing). We indicate the disadvantages of widely applied Shooting and Bouncing Rays method. We also provide the examples of its software implementation. As opposed to the employed approaches, the method and the algorithm synthesized on its basis are introduced for the reflected ray tracing where the search process is implemented faster and there are no disadvantages inherent in their common counterparts.

العلاقة: https://www.dpi-journals.com/index.php/dteees/article/view/16607Test

الإتاحة: https://doi.org/10.12783/dteees/gmee2017/16607Test
https://www.dpi-journals.com/index.php/dteees/article/view/16607Test

المؤلفون: STAWIARSKI, Adam, SANETRA, Izabela, MUC, Aleksander

المصدر: DEStech Transactions on Engineering and Technology Research; International Conference on Electrical Engineering and Automation (ICEEA 2016) ; 2475-885X

مصطلحات موضوعية: Fatigue failure, Wave propagation, Composite plate, Time of flight, Structural heath monitoring

الوصف: In this paper the elastic wave propagation method was used to observe the evolution of the failure form in composite multilayered plates with a circular hole. The measuring system based on two, surface-mounted piezoelectric (PZT) elements was applied. The sequential measurements of the elastic wave propagation during the fatigue test have been carried out. The Time of Flight (ToF) parameter defined as a time between guided wave excited by an actuator and the first wave captured by a sensor was introduced to observe the behavior of the defected structure. Monitoring of the (ToF) parameter during the fatigue test has been applied to estimate the state of the structure.

العلاقة: https://www.dpi-journals.com/index.php/dtetr/article/view/6717Test

الإتاحة: https://doi.org/10.12783/dtetr/iceea2016/6717Test
https://www.dpi-journals.com/index.php/dtetr/article/view/6717Test