The paper introduces the structural composition,intermediate driving technology,hydraulic belt-coiling technology and new belt-storage technology of the gate oversize extensible belt conveyor currently used in China.

Then according to the driving and control requirements of long distance main incline shaft conveyor with midway driving,the suitable high voltage frequency converter is selected.

This paper analyses the mechanics of the technique of pulley unloading midway driving and linear friction midway driving, and belt s tensile stress varying law of the conveyor with this driving devices, gives the designing preconditions, steps and simple formulas of belt conveyor with midway driving devices, points out the applicable technical condition of this device.

Network monitor based on NDIS intermediate driver;

This paper introduces the technology of intercepting and analyzing data packets, adopting the NDIS intermediate driver tech- nology in the Core drive level of Windows XP.

After researching and summarizing the general methods to construct MANET routing protocol stack through Windows NDIS(network device interface specification) architecture,this paper proposed a scheme design to realize DSR(dynamic source routing) protocol through NDIS intermediate driver.

By analysis and comparing network packet filter technology based on windows,NDIS intermediate drivers,SPI is adopted on server and client separately.

To implement a network sniffer of high performance,this paper introduces the ultimate principles of sniffer,and presents a design thought of network sniffer based on Network Device Interface Specification(NDIS) intermediate drivers and introduces the key technologies and the design frame.

Different levels of digital communication are used according to various types of firewalls for penetration, they are TDI (Transport Driver Interface), IMD (Intermediate Driver) and NDIS Hook.