The Qinghai– Tibet Plateau (QTP), which embodies the largest area of permafrost at mid–low altitudes world, has been experiencing rapid degradation and changes in freeze–thaw processes for past decades. However, responses potential feedbacks methane flux from peatlands on QTP to changing cycles (FTCs) remain unknown. In this study, we collected peat soils Zoîgé peatlands, peatland complex QTP, ...

Cellular networks are currently facing severe traffic overload problems caused by excessive traffic demands. Offloading part of the cellular traffic through other forms of networks, such as Delay Tolerant Networks (DTNs) and WiFi hotspot, is a promising solution since these networks can only provide intermittent connectivity to mobile users, utilizing them for cellular traffic offloading may re...

One of the main problems in deep sub-micron designs of high speed buses is the propagation delay due to the crosstalk effect. To alleviate the crosstalk effect, there are several types of crosstalk avoidance codes proposed in the literature. In this technical brief, we develop explicit constructions of two types of memoryless crosstalk avoidance codes: forbidden overlap codes (FOCs) and forbidd...

This paper develops a fault tolerant attitude controller for next generation nanosatellites. The proposed fault tolerant attitude control algorithms in this study are based on first order and high order sliding mode control theory as well as fuzzy logic systems to achieve low cost and real time autonomy. A locally asymptotically stable adaptive fuzzy first order sliding mode controller is chose...

To improve the reliability of the motion control system for an autonomous underwater vehicle (AUV), sensor fault tolerant control based on replace control was talked about. This paper analyzed the decoupling controller and the sensor system firstly, and proposed a fault tolerant control strategy based on the ideas of replacing the fault sensor outputs by the sliding-mode observer outputs (also ...

There is a need for better integration of the fault tolerant and the control designs for safety critical systems such as aircraft. The dependability of current designs is assessed primarily with measures of the interconnection of fault tolerant components: the reliability function and the mean time to failure. These measures do not directly take into account the interaction of the fault toleran...

In this paper the problem of Fault Tolerant Control (FTC) in the framework of Discrete Event Systems (DES) modeled as automata is considered. The approach we follow is the so-called active approach in which the supervisor actively reacts to the detection of a malfunctioning component in order to eventually meet degraded control specifications. Starting from an appropriate model of the system, w...

Abstract: A new adaptive fuzzy fault-tolerant control scheme for complex non-linear systems is proposed in this paper. The approach presented here combines fuzzy T-S dynamic model with Riccati equation. In each local linear model of the fuzzy dynamic model, Riccati equation is used in the design of fault-tolerant control. These local models are linked together by fuzzy membership functions to f...