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.
In this article, we explored systematically the spore morphology of Pteridaceae by observation of the species distributed in Shandong Province using scanning electron microscopy (SEM). The results showed that the spore morphology of all the species in the family is tetrahedral and trilete. The characters of spore ornamentation are intraspecies stable, but significantly different among species and...
The study of Intra-county Economic Development in Guangxi Beibu Gulf Economic Regions has both theoretical and practical significance. With construction of index evaluation system and application of grey relational synthetic evaluation, assessment and comparison on development of Guangxi Beibu Gulf Economic Region has been conducted. The research shows that economic development of intra-county region...
The study of China provincial-level regional tourism competitive power has both theoretical and practical significance. According to constructing index system of evaluating and using grey relational synthetic evaluation, the assessment and comparison are progressed by the tourism competitive power. The study finds that the competitive power shows imbalance difference distribution with 'four groups'...
China provincial-level regional tourism competitive power is a complicated chaotic system with the existing multitudinous factors and the subsystem in different ways. According to constructing evaluating index system of tourism competitive power in provincial-level regions, The Grey relational synthetic evaluation is adopted to rank the relative relation of eight influencing essential factors of the...
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.