In an earlier paper we had presented a novel dual channel identification approach for mobile wireless communication systems. Unlike traditional channel estimation methods that rely on training symbols, this approach used a bent-pipe feedback mechanism requiring the mobile station (MS) to send portions of its received signal back tO the Base Station (BS) for wireless channel identification. Usin...

This study emphasizes the simulation and analysis of the compensatory effect of temperature on automatic gain control (AGC). From the analytical results, a temperature regulation mechanism was proposed. The technology most appropriate for and adaptive to mobile terminal stations under various temperatures was considered to ensure excellent transfer quality of the mobile terminal station. Finall...

Saccharopine dehydrogenase (SDH) is the last enzyme in the AAA pathway of l-lysine biosynthesis. On the basis of crystal structures of SDH, the whole catalytic cycle of SDH has been studied by using density functional theory (DFT) method. Calculation results indicate that hydride transfer is the rate-limiting step with an energy barrier of 25.02kcal/mol, and the overall catalytic reaction is ca...

Clustering is an effective topology control approach, which can prolong the lifetime and increase scalability for wireless sensor networks (WSNs). The popular criteria for clustering technique are to select cluster heads with more residual energy and to rotate them periodically. However, hot spots will emerge in real network environment at locations where they have heavy traffic load to transfe...

The Gap Voltage Feed-Forward (GVFF) Module produces adaptively generated inphase (I) and quadrature (Q) reference signals for a single RF station. This module measures the periodic (1-turn) beam induced cavity transients caused by the presence of an ion clearing gap in the beam. A reference waveform is generated to minimize the direct feedback error signal transient caused by the gap. In additi...

Given the security problems of the urban rail transportation, this paper proposes a methodology for congestion risk evaluation and precaution in order to guarantee the safety of passengers and improve the operation efficiency in metro stations. To begin with, we selected the retention rate of the platform, the waiting rate of the ticket gate and the transfer efficiency as the indexes for the st...

The demand for wireless communication is increasing day by day. People want a high speed of communication in less time. No one is interested in use of bunch of wires. So we move to wireless communication. As technology increases a demand also increases. Now everyone wants a fast communication from anywhere to anyone. Even rural area also requires internet facility. It is too hard to establish a...

The paper considers downlink space-time block coding with a pre-filtering technique for time division duplex MCCDMA. We consider the use of antenna arrays at the base station (BS) and a single antenna at the mobile terminal. The space-time block codes allow that the spatial diversity be efficiently exploited and the multi-user pre-filtering technique allows to format the transmitted signals so ...

tethered aerostat balloons that operate at altitudes up to 10,000 feet above mean sea level. • A 180,000-pound mobile mooring station and tether system is used to launch, recover, and secure each aerostat system. The aerostat tether system provides radar control and data transfer links to supporting ground control and data processing stations. JLENS is deployable to pre-planned operational site...

We present an algorithm for multi robotic exploration of an unknown terrain where the robots are also required to serve the role of hops or nodes in a communication link maintained between a fixed base station and the last robot (end effector robot) in the chain. A baseline algorithm is presented as a tree traversal mechanism akin to a depth first strategy, further embellished by an adaptive ru...