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LTE-based mobile satellite communication system is a combination of terrestrial LTE system and satellite communication techniques, which aims at improving the current LTE system's technical specifications for better service quality. AMC (Adaptive Modulation and Coding) technique is applied in current LTE system to improve system capacity and data transmission efficiency. CQI (Channel Quality Indicator),...
Host-compiled simulation has been widely adopted as a practical approach for fast and high-level evaluation of complex software-intensive systems at early stages of the design process. In such approaches, higher speed is achieved by coarse-grained simulation of the system, which also leads to a loss in timing accuracy. To eliminate the inherent speed and accuracy tradeoff, we present an adjustive...
We present a novel framework for encoding latency analysis of arbitrary multiview video coding prediction structures. This framework avoids the need to consider an specific encoder architecture for encoding latency analysis by assuming an unlimited processing capacity on the multiview encoder. Under this assumption, only the influence of the prediction structure and the processing times have to be...
A general path loss model for in-room radio channels is proposed. The model is based on experimental observations of the behavior of the delay-power spectrum in closed rooms. In such a room, the early part of the spectrum observed at different positions typically consists of a dominant component (peak) that vanishes as the transmitter-receiver distance increases; the late part decays versus distance...
As the gap between the speed of computing elements and the disk subsystem widens it becomes increasingly important to understand and model disk I/O. While the speed of computational resources continues to grow, potentially scaling to multiple peta flops and millions of cores, the growth in the performance of I/O systems lags well behind. In this context, data-intensive applications that run on current...
Robots controlled by Reinforcement Learning (RL) are still rare. A core challenge to the application of RL to robotic systems is to learn despite the existence of control delay - the delay between measuring a system's state and acting upon it. Control delay is always present in real systems. In this work, we present two novel temporal difference (TD) learning algorithms for problems with control delay...
The load object of ball mill in thermal power plant has complex traits that are large time-delay, slow time-varying, strongly nonlinear, etc. It is difficult to obtain satisfactory control performance using conventional control methods. The model-free adaptive control method based on grey prediction was introduced to control ball mill load in this paper. This method combined the adaptive, anti-interference...
An integrated macroscopic traffic model is proposed, which integrates a macroscopic urban traffic flow model with a microscopic traffic emission model for individual vehicles. As a macroscopic model, the integrated model is fast enough for on-line control purposes. Nevertheless, the model can still capture the traffic emissions for vehicles in different states compared with using a macroscopic traffic...
Internet End-to-end delay is an important QoS metric. It can be used in real-time application designing and optimizing - control system based on the Internet for example. In such applications, precisely predicted delay is needed. However, due to the complex of the Internet, end-to-end delay is dynamic and thus hard to predict. This paper first shows the jitter of end-to-end delay is chaotic based...
This paper analyzes a new alternative approach to compensate for the effects of time delays on a dynamic networked control system using one step ahead prediction based on an adaptive time delay neural network or TDNN and the combined application of optimal control and classical pole placement methods.
We show how we can perform the time parallel simulation of Web servers to solve some performance issues. Both the classical version and the monotone version we have recently introduced may be used. We present the monotone improvement of time parallel simulation and we state that the model of a web server satisfy the assumption: monotonicity and predictability.
In teleoperation systems, operator performance is negatively affected by time-delayed visual feedback. Predictive display (PD) compensates for delays by providing synthesized visual feedback. While most existing PD methods rely on a priori models (e.g., from laser range finding or stereo vision), recent work on monocular SLAM and SFM makes it possible to acquire PD models in single camera applications...
The key resources of a flight include aircraft, cockpit crew and cabin crew. For purposes of dispatching resources effectively, the three resources may be distributed independently. If the initial flight of a flight plan is delayed due to bad weather or other factors, it may result in the delays of the directly downstream flights that need to await its resources. If the delays continue to spread to...
The identification of speedpaths is required for post-silicon (PS) timing validation, and it is currently becoming time-consuming due to manufacturing variations. In this paper we propose a method to find a small set of representative paths that can help monitor a large pool of target paths which are more prone to fail the timing at PS stage, to reduce with the validation effort. We first introduce...
Indoor propagation models attract much interest these days because of their importance in the applications of 3G/4G network planning and optimisation. The accuracy and running speed directly affects the practical use of such models. This paper extends a discrete ray launching model IRLA (Intelligent Ray Launching Algorithm) to indoor scenarios. A typical office room will be selected to validate this...
In order to provide a flight delay prediction tool based on software system for airports and airlines, a visualization platform of flight delay intelligent prediction is designed and implemented. The platform consists of airport data acquisition front-end computer, database server, application server, web service server, client equipments, and network communication system. On the server side, several...
Initial flight delays caused by weather or any other factors may result in downstream flight delays. The downstream flights may be delayed due to awaiting the aircraft and crew resources of the upstream flights or competing with delayed flights for the airport runway resource. Only one or the other of these two factors that may lead to flight delay propagation has been considered in existing studies...
The extended cellular automata (ECA) is one of the extending application of cellular automata (CA) by extending the component of cell and the definition of cellular neighbors. Based on ECA, the definition of parallel cellular automata (PCA) composed of multi-ECA is proposed and the evolutions of all ECAs are parallel. Depending on the model of PCA, it becomes more easily to describe the synchronous...
This paper presents parameter tuning of model predictive controller. The effect of prediction horizon on the stability of the system is studied. The performances of model predictive controller and linear quadratic regulator on the inverted pendulum are compared.
In this paper we apply the nonlinear time series prediction method to the traffic measurements data. Based on the phase space reconstruction, the support vector machine prediction method is used to predict the traffic measurements data, and the neighbor point selection method is used to choose the number of nearest neighbor points for the support vector machine regression model. The experiment results...
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