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.
The authors analyzed the fundamental principle of sound wave and the subjective evaluation of noise. According to the kinematics of machine tool, we analyzed the producing mechanism and main influence factors of machine tool firstly, then analyzed and measured the milling noise of internal gear milling machine tool, and get the main influence factors of gear noise were from meshing basic frequency...
Ideological and political education plays an irreplaceable role in the building of correct outlook of the world and life for college students. It shouldn't dissociate besides the fast development of science and technology. Combing the Multimedia technology and education content, displaying the advantages of multimedia teaching tools, it will promote the initiative of students and cultivate their habit...
Methyl palmitate, a kind of fatty acid methyl ester, has been found in many plants. Many biological functions of methyl palmitate have been found. Recently we isolated the methyl palmitate from the green walnuts husks and found it has acaricidal activity that had not been reported before. Here, the acaricidal activity of methyl palmitate, industrial methyl palmitate and the mixtures of methyl palmitate...
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.