A Channel Emulator Based on WSSUS

This design is based on WSSUS channel model. We achieved a real-time signal processing channel emulator which used the channel parameters provided by the DRM criteria. The article first introduces the WSSUS channel model, and then bases DRM criteria to determine the model parameters. Finally, through a structured design, we realized the model HF channel emulator by C language programming.

Based on Adaptive Control in the Process of the Liquid Level Instrumentation Control System Design

On complex process control frequently encountered in nonlinear, inertia big, delay time longer phenomenon, is put forward based on adaptive control in the process of the liquid level instrumentation control let more model, hardware design on the input signal processing channel unit, regulators unit, output signal processing channel of unit, use control system has the deviation of the signal, may make the output of the best control signal. The control mode can not dependent on the mathematical model of the object, can be applied to many order, nonlinear, multivariate occasion. This paper provides the simulation model, and the simulation results show that the system has to level good robustness and controlling, and the controller is simple and relatively easy to implement, and has the obvious engineering application value.

Coherence in text, coherence in mind

This paper suggests that text coherence is a multi-factored affair that, ultimately, pertains to the mental organization of episodic memory, most likely as a partially-hierarchic mental structure. What text researchers usually describe as coherence is merely an artifact of the cognitive phenomenon. The role of grammatical clues in signalling text coherence is investigated, and it is suggested that the grammar processing channel merely supplements an evolutionarily older channel of lexically-guided (content-based) coherence. Coherence is both local and global, and both properties can be signalled by both processing channels (lexicon and grammar). Finally, the establishement of text coherence is a flexible, negotiable process, and this is true of both conversation and narrative.