Wave spectrum

Ebook "Observational astrophysics (Third edition)" focuses on fundamental and sometimes practical limitations on the ultimate performance that an astronomical system may reach, rather than presenting particular systems in detail. Avoiding particulars, it covers the whole of the electromagnetic spectrum, and provides an introduction to the new forms of astronomy becoming possible with gravitational waves and neutrinos. It also treats numerical aspects of observational astrophysics: signal processing, astronomical databases and virtual observatories.

724p tachieuhoa 28-01-2024 6 2   Download

Part 1 of ebook "Principles of musical acoustics" provides readers with contents including: Chapter 1 - Sound, music, and science; Chapter 2 - Vibrations 1; Chapter 3 - Vibrations 2; Chapter 4 - Instrumentation; Chapter 5 - Sound Waves; Chapter 6 - Wave properties; Chapter 7 - Standing waves; Chapter 8 - Standing waves in pipes; Chapter 9 - Fourier analysis and synthesis; Chapter 10 - Sound intensity; Chapter 11 - The auditory system; Chapter 12 - Loudness perception;...

165p dangsovu 20-10-2023 6 4   Download

We describe a thorough study of the wave-mixing procedure in the extreme ultraviolet (XUV) region involving three laser fields (800 nm, 1400 nm and 1860 nm). In addition to the phase matched high harmonic generation (HHG) spectrum generated by an 800-nm laser (driving field), non-integer order wave-mixing spectra are produced when the driving field and the control field (1400 nm or 1860 nm) are collinearly focused into krypton gas.

10p vispiderman 15-06-2023 3 2   Download

The application of brushwood fences along the Mekong deltaic coast has recently played a significant role in wave damping and promoting sedimentation. The results show a good agreement of wave heights and wave spectrum between the physical, vegetation and porosity models. Furthermore, the computational and physical model errors, such as BIAS and SI values, are less than 1 mm and 10%, respectively.

10p viironman 02-06-2023 7 3   Download

Electrical status epilepticus during slow-wave sleep (ESESS) which is also known as continuous spikewave of slow sleep (CSWSS) is type of electroencephalographic (EEG) pattern which is seen in ESESS/CSWSS/epilepsy aphasia spectrum.

15p vinarcissa 21-03-2023 5 1   Download

Wireless networks - Lecture 1: Introduction to Wireless communication. The main topics covered in this chapter include: the wireless vision; radio waves; channel capacity; signal-to-noise ratio; EM spectrum;...

27p haoasakura 30-05-2022 9 3   Download

Energy of surface waves is almost dissipated as propagating from shallow water to muddy flat and in mangrove forest. The study aims to analyze energy spectral density by using Blackman-Tukey (BT) and Fast Fourier Transform (FFT) methods in order to analyze the wave energy in mangrove areas in Cu Lao Dung (Soc Trang province).

10p vielonmusk 21-01-2022 9 0   Download

This article presents the method to establish random wave surface in Vietnam’s sea areas based on any suitable wave spectrum. Hereby, hydro–dynamical characteristics of waves can be determined for further calculation of wave loads on offshore structures.

6p viwilliamleiding 04-12-2021 18 1   Download

In this work, a model is delivered, which highlights a simple mathematic relationship between the refractive index of an optical material and its transmittance spectrum measured by Fourier Transform Infrared Spectroscopy. Such model allows determining the refractive index of ceramics fabricated by hot-pressing of MgF2 nanoparticles. The reliability of this method has been verified on a silicon wafer taken as a reference (< 0.5%, discrepancy with data from literature on Si). Our approach can be applied to a variety of promising novel optical materials being developed.

9p cothumenhmong11 05-05-2021 25 1   Download

This research calculated the power spectrum of Alpha wave and Theta wave, to detect the transition of wake - sleep stages by K-means clustering algorithm. Sleep latency is one of the factors that determine the quality of sleep. The sleep onset is detected based on the phase shift of the Alpha and Theta waves. The exact timing of the sleep onset was important in this study. The user interface was developed in this study to compute sleep latency in normal and musical experiment.

9p trinhthamhodang9 04-12-2020 20 2   Download

The objective of this paper is to analyze and describe the impact of spectrum assignment and mobile broadband on economic growth and competitiveness in Thailand.

11p murielnguyen 01-07-2020 5 2   Download

Smart car deals with the smart collision avoidance between the vehicles using visible light communication. The basic concept behind this technique is that the data can be transferred through LED light by varying light intensities faster than the human eyes can perceive.

9p lucastanguyen 01-06-2020 24 2   Download

Based on the analysis of ocean wave data sets of this province the significant height of 3.854 m and peak period of 9.807 s were obtained. Those can be used to determine the wave class based on the environmental information’s, and the appropriate type of spectral model to use in the study of ocean wave energy converters for energy harvesting.

9p cleopatrahuynh 01-06-2020 16 1   Download

In fact, the sea wave is considered as a stochastic process. The random characteristics of the sea wave are described by a suitable spectrum. Offshore structures analyzing on random concept may be determined by creating a random wave surface from a defined wave spectrum for the sea area of consideration. This paper presents the method to establish random wave surface in Vietnam’s sea areas based on any suitable wave spectrum. Hereby, hydro -dynamical characteristics of waves can be determined for further calculation of wave loads on offshore structures.

5p quenchua5 17-05-2020 13 0   Download

Millimeter wave (mmWave) and massive multiple-input multiple-output communications (massive MIMO) have been adopted as the most important keys for the next generation (5G) wireless networks due to high spectrum availability and massive use of space diversity for high throughput communications. Massive MIMO must be implemented parallel with mmWave to overcome high path-loss issue in mmWave band by improving the antennas gain.

16p son248 24-03-2020 27 1   Download

The fast neutron spectrum allows up to a ~30-fold gain in fuel utilization efficiency when compared to conventional light water reactors utilizing enriched fuel. When compared to other fast reactors, TWRs represent the lowest cost alternative to enjoy the energy security benefits of an advanced nuclear fuel cycle without the associated proliferation concerns of chemical reprocessing.

14p minhxaminhyeu5 30-06-2019 17 0   Download

WAM (WaveModeling) is a third generation wave model developed by WAMDI Group which describes the evolution of a two-dimensional ocean wave spectrum under the effects of winds, currents, bottom and non-linear wave-wave interactions. The model runs for deep and shallow waters and includes depth and current refraction. This study used the WAM cycle 4.5 with model domain which is covered from 990E to 1210E and 00N to 250N with a resolution of ∆X = ∆Y = 0.250 .

7p miulovesmile 09-10-2018 22 0   Download

In the paper, wave energy spectrum and MSI will be analyzed. Evaluation will not only provide an initial feedback of passenger’s comfort in ship design stage but also estimate the suitable speed to steer the cruise comfortably.

8p sansan2 26-05-2018 21 1   Download

Wireless Communications Principles and Practice - Chapter 4: Mobile Radio Propagation Large-Scale Path Loss Introduction, Electromagnetic Spectrum, Electromagnetic Waves; Speed, Wavelength, Frequency; Electric and Magnetic Fields.

38p maiyeumaiyeu25 16-12-2016 51 5   Download

You will understand the physical meaning behind the mathematics of wireless signals and learn the intricacies and tradeoffs in signal selection and design.

903p dangkhoa1612 18-05-2013 157 49   Download