At first, Bluetooth technologies including protocol stack, application profiles and network functions are described. Then studies on network formation of Bluetooth Ad Hoc networks are presented. At last Bluetooth network encapsulation protocol (BNEP) used in Bluetooth Ad Hoc networks is discussed in detail.
In this thesis, author briefly introduces the overview of Wireless LAN, networkstructure, transmission means and characteristic, also gives out the series protocols ofthe wireless LAN. After that I major analyzed MAC layer mechanism of IEEE802.11in details --DCF medium random access protocol and IEEE802.11e MAC layermechanism --EDCA medium random access protocol, and analyzed the improvementin IEEE802.11e protocol for the request of users' service quality against IEEE802.11protocol.
Introduces the communication mode between ETL series PLC facilities widely used in 500 kV substations and their application program interfaces MM1500. Presents the realization scheme of organizing a remote maintenance network via RS-232.
In the present study, two of the probable an umor marine compounds, manzamine A and sarcophine, were screened using benzo[a]pyrene (BP)-derived DNA adduct formation in MCF-7 cells as intermediary biomarker.
Most of the compounds were found to be very potent inhibitors of malondialdehyde (MDA) formation at 10-3M.
However, no significant inhibitory effect was obtained on superoxide anion formation.
Results of clone formation and Flow cytometry analysis (FCAS) suggested that prodigiosin has the capability of restraining mitosis by regulating the cell cycle.
These corresponding chalcones were reacted with phenyl hydrazide in glacial acetic acid, which led to the formation of novel 4-[5-(substituted phenyl)-1-phenyl-4,5-dihydro-1H-3-pyrazolyl]-2-methylphenol derivatives.