The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Significant wave height (SWH) is one of the major ocean altimetry products. This paper proposes a fast algorithm in retrieving the SWH from altimeter waveform. The idea is to differentiate the echo waveform and acquire a Gaussian-shape waveform. Then the standard deviation of the Gaussian function is computed directly and the standard deviation of the scatter probability density function (hence, SWH)...
Although smooth groups and smooth rings were presented, however the important method that smooth ring acts on smooth group has not been seen in report. In order to solve the problem, this paper defines smooth modulus, smooth homomorphism and smooth quotient modulus by the action. In order to compare two smooth modulus, this paper proves the fundamental theorem of smooth homomorphism of smooth modulus...
Aimed at that available application of smooth homomorphism is around the comparison of two smooth modulus with each other and any of its application to construct new smooth modulus has not been seen, this paper applies smooth homomorphism and modulus to construct smooth projective modulus and proves three theorems:1. the theorem that lifts some examples of smooth projective modulus. 2. the sufficient...
If two or more kinds of elastic materials are arranged periodically in 1D, 2D, or 3D, a phononic crystal is realized. Similar to the electromagnetic wave propagation in a photonic crystal, the phononic crystal also has the property of phononic band gap for the sound or mechanical wave. That is, certain frequency band of sound or mechanical wave cannot pass the phononic crystal. It is believed that...
This letter analyzes the statistical properties of the root-mean-square (RMS) delay spread in a two-path distributed antenna system, where the received signal power from each path is subject to composite gamma fading and lognormal shadowing. The channel power delay profile considered consists of two delta functions with correlated power levels. We present analytical expressions for the probability...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.