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To solve the location issue, in this paper, we proposed a Received Signal Strength for Directional Antenna (RSS-DA) scheme, it uses the mobile anchor nodes that already know the coordinates to join the Received Signal Strength (RSS) measurement in the data transmission. The number of beacons conforms to the terminated threshold in the sensor nodes, the estimated locations are used the RSS algorithm...
Thermal noise in optical reference cavities sets a severe limit to the frequency instability of ultra-stable lasers. We, for the first time, give an analytic expression of the contribution of the spindle spacer based on Levin's formulation of the fluctuation-dissipation-theorem (FDT). The analysis indicates that the thermal noise of spindle cavity has a few different features from cylindrical cavities...
Off-lattice MD-simulations of polyelectrolyte brushes in good solvent are compared with various different mean-field theories. We demonstrate the importance of excluded volume effects under the present solvent conditions, which had intentionally been left out in some of the classical mean-field approaches of Pincus or Zhuina et al. We evaluate the accuracy of the Debye-approximation in the simulations...
The general process of human's solving complex problem and the incompleteness of qualitative knowledge and quantitative knowledge when being used in solving complex problem are analyzed. Then a meta-synthesis approach and its framework to model the complex problem solving are put forward. According to this approach, the modeling process is divided into three phrases, which are the construction of...
A robust adaptive controller is presented for the control system of user-satellite antenna acquisition and tracking TDRS (tracking and data relay satellite), which faces with the uncertainties of un-modeled dynamics and unknown bounded disturbance and the control input constraint. The stability is proved by using Lyapunov stabilization theory. The simulation results show that the robust adaptive controller...
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