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Pricing plays an important role for service provision in cloud computing. In this paper, we investigate price based resource access control in two Monopoly IaaS cloud market, respectively. The two IaaS cloud market is formed by one public cloud service providers (CSPs) and cloud broker (CB), provisioning cloud services to delay-sensitive cloud users (CUs). In the first monopoly cloud market, we treat...
Cloud computing has received a significant amount of attentions from both engineering and academic fields. Designing optimal pricing schemes of cloud services plays an important role for the success of cloud computing. How to set optimal prices of cloud resources in order to maximize these CSPs' revenues in an Infrastructure as a Service (IaaS) cloud market while at the same time meeting the cloud...
This paper studies the design of dynamic outputfeedback protocols for H∞ consensus of homogeneous linear multi-agent systems over general directed graphs. Except for the consensus objective when no disturbance exists, the design protocol is also expected to guarantee an H∞ norm level of the error system from disturbances to the error signal. The H∞ consensus problem is first transformed into an H∞...
This paper deals with robust consensus of uncertain linear multi-agent systems via dynamic output-feedback protocols. Agents are assumed to have identical nominal linear time-invariant dynamics but are subject to heterogeneous additive stable unmodelled dynamics. We consider a dynamic output-feedback protocol of the observer-based type without direct exchange of local controller states. Sufficient...
This paper is concerned with cooperative output regulation of heterogeneous multi-agent systems. Agents are allowed to be heterogeneous general linear time-invariant systems and the communication graph is not restricted to the acyclic type. New distributed state-feedback controllers with extra scalar parameters are constructed. A global sufficient solvability condition is first derived and simplified...
This paper investigates the consensus problem of homogeneous linear multi-agent systems using output feedback. An observer-type protocol is formulated, which only requires relative outputs of neighbours but not the information exchange between controllers. It is shown that the protocol bridges some existing ones of the same nature. A robust control approach is presented for consensus protocol design,...
In Wireless Mesh Networks (WMNs), supporting Quality of Service (QoS) to enable a rich portfolio of applications/real-time multimedia applications is foreseen to be vital for the success of next generation networking technologies. However, today's cutting edge standards are not perfectly equipped to cater to this task. These standards come with an inherent complexity and suffer from innate problems...
Pricing cloud resources plays an important role in leading to the success of cloud computing. Cloud services are priced at different levels in infrastructure-as-a-service (IaaS) cloud market. For example, Amazon EC2 offers its cloud resources with three pricing schemes, the subscription model, pay-as-you-go model and spot pricing model. With more and more IaaS cloud service providers (CSPs) beginning...
The paper investigates generalized H∞ model reduction for two-dimensional (2-D) systems represented by the Roesser model and the Fornasini-Machesini local state-space model, respectively. The generalized H∞ norm of 2-D systems is introduced to evaluate the approximation error over a specific finite frequency (FF) domain. In light of the 2-D generalized Kalman-Yakubovich-Popov lemmas, sufficient conditions...
In this paper, we present some remarks on frequency weighted balanced truncation technique based on Schur-decomposition idea. In particular we show that two frequency weighted balanced truncation techniques [7], [9] based on Schur-decomposition idea are special cases of a more general technique introduced recently in [10], [11].
This paper investigates the problem of frequency-specific (FS) model approximation of transfer functions. The objective is to find an approximation transfer function for a higher-order one such that the approximation error over a specific frequency range is minimized. The importance of this problem lies that, in practice, a better approximation performance within a certain frequency range is often...
This paper is concerned with the issue of noise shaping of delta-sigma modulators. The shaped noise transfer function (NTF) is assumed to have infinite impulse response (IIR), and the optimization objective is minimizing the maximum magnitude of the NTF over the signal frequency band. By virtue of the generalized Kalman-Yakubovich-Popov lemma, the optimization of NTFs is converted into a minimization...
This paper investigates the problem of robust H;∞ filtering for uncertain two-dimensional (2-D) discrete systems in the Fornasini-Marchesini local state-space (FM LSS) model with polytopic uncertain parameters. The goal of the paper is to design filters such that the finite frequency (FF) H;∞ norm of the filtering error system has a specified upper bound for all uncertainties. A generalized bounded...
PCA is a well-known feature extraction and data representation technique widely used in the areas of pattern recognition, computer vision and signal processing, etc. But this method is usually affected by light illumination. A novel technique for face recognition is presented in this paper. PCA and SVM are combined in this technique. Before using PCA to extract feature, these images should be processed...
This paper is concerned with the development of the generalized Kalman-Yakubovich-Popov (KYP) lemma for two-dimensional (2-D) Fornasini-Marchesini local state-space (FM LSS) systems and its application to state-feedback positive realness control with finite frequency specifications. An linear matrix inequality (LMI) characterization for a rectangular finite frequency region is firstly technically...
This paper is concerned with the problem of H∞ filter design for linear continuous-time state-delayed systems with finite frequency specifications. The developed approaches in the paper are to design a filter guaranteeing an H∞ performance bound in a finite frequency range for delayed systems. To reduce conservatism, delay-partitioning idea is exploited to derive a new finite frequency bounded real...
To overcome the inherent defects in wind-solar hybrid system: power generation and electricity load's imbalance because of uncertainty of resources. this article aiming at XJ Group's project design of wind-solar hybrid power supply system, by way of pumped-storage to replace the battery of wind-solar hybrid power supply system, this method can effectively overcome above problems. Wind-solar and pumped-storage...
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