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.
Over the past two decades, there has been a growth in human activities in coastal waters worldwide, including underwater blasting. The broadband, high source-level noise produced by underwater blasting can seriously affect marine mammals and fish, leading to behavior modification, hearing organ damage and even death. Large yellow croaker (Pseudosciaena crocea), which is an important fish species in...
Due to its limited energy, the underwater transponder system needs to reduce its energy consumption. And a low-power duty cycle circuit can control work of the system and sleeping, which can reduce the power consumption. This paper designs a digital duty circuit based on low power MSP430 microcomputer that can detect wake-up signals and activates the transponder system to work. It has capability of...
In order to solve the problem of detecting airborne target from water, air and underwater acoustic field spatial distribution model stimulated by the moving source in the air is established by propagator matrix using wave number integration algorithm. On this basis, underwater time domain signal of the airborne source is acquired. Two different Doppler frequency shift spectrum lines appear at the...
Ocean current is one of the important components in the Ocean state monitoring, which can be measured by ocean acoustic technology. This paper studies the inference of current filed. Based on least squared (LS) method, we can estimate the current filed with travel time. However, this method is suffered from perturbation from noise, and also requires prior information which is hard to obtain. In this...
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.