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Among the high-radix and low-diameter networks, fat-tree topology is commonly used in HPC and datacenter systems. Resource and job management is critically important to mitigate application interference in order to achieve high system performance and utilization. Preliminary studies have shown the effect of job placement on parallel scientific applications performance. In this work we study interference...
In this paper, a discrete-time switched nonlinear system is proved to have an input-to-state stable (ISS) property under mode-dependent average dwell-time switching signals if each constituent subsystem is ISS. This result is then applied to stabilization of uncertain discrete-time nonlinear systems via an improved switching supervisory control scheme. The states of the closed-loop system are proved...
Using multiple models to deal with transients for adaptive systems which is large parametric uncertainties was introduced in the 1990s. The common method is using switching schemes. However, these methods has some potential drawbacks. In this paper, a new multiple models scheme is proposed for a class strict-feedback nonlinear discrete-time systems. Firstly, we use feedback linearization and backstepping...
With the constant increase of social-network data published, the privacy preservation becomes more and more important. Although some literature algorithms apply K-anonymity to the relational data to prevent an adversary from significantly perpetrating privacy breaches, the inappropriate choice of K has a big impact on the quality of privacy protection and data utility. We propose a technique named...
This paper proposes a reconfigurable scheme of wireless power transmission in fully-enclosed box. The proposed scheme includes one transmitting element and multiple parasitic elements. Field distribution inside the box is reconfigured by switching the parasitic elements' termination between open and short, with the aim of delivering wireless power efficiently to a receiver whose location is not fixed...
In SDN (Software-Defined Networks), applications are granted the ability to control and manage networks, such as routing, access control, and load balance, which is considered one of the most significant characters of SDN. However, these concurrent applications are lack of interactions when they operate on overlapping portions of the traffic and introduce a critical challenge of potentially conflicting...
Today's cloud storage services must offer storage reliability and fast data retrieval for large amount of data without sacrificing storage cost. We present SEARS, a cloud-based storage system which integrates erasure coding and data deduplication to support efficient and reliable data storage with fast user response time. With proper association of data to storage server clusters, SEARS provides flexible...
With increasing capacity of converter system, technology of paralleling modular has become a research hot spot in power electronics field. According to the frequency and amplitude of output AC voltage, converter constituted of paralleling modular can be divided into constant voltage constant frequency (CVCF), variable voltage variable frequency (VVVF), variable voltage constant frequency (VVCF). CVCF...
The disturbance models in industry system always change with several disturbances existing simultaneously. The performance assessment based on Single Model Time-variant Minimum Variance (SMTMV) is not available to system with multiple time-variant disturbances. Since the transient deviation exists, the performance assessment based on Multi-model Switching Time-variant Minimum Variance (MSTMV) is not...
Fat-tree topology is very popular for constructing interconnect network for data centers. Routing is one of the most important design issues of data center networks. Several routing algorithms have been proposed for fat-tree topology, but they all ignore the fault diagnosis problem. In order to facilitate the diagnosis of link-fault in fat-tree based networks, in this paper we propose the FT-BTR,...
This paper reports the first 8kV+ ESD-protected SP10T transmit/receive (T/R) antenna switch for quad-band (0.85/0.9/1.8/1.9-GHz) GSM and multiple W-CDMA smartphones fabricated in an 180-nm SOI CMOS. A novel physics-based switch-ESD co-design methodology is applied to ensure full-chip optimization for a SP10T test chip and its ESD protection circuit simultaneously.
This paper reviews recent advances in 3D on-chip electrostatic discharge (ESD) protection design for integrated circuits (IC). Traditional ESD protection relies on PN-junction-based structures, which have inherent disadvantages including fixed ESD triggering and parasitic effects. New ESD protection mechanisms and structures, including nano crystal dots and nano crossbar concepts, provide alternative...
A new approach is proposed in this paper to generate and radiate pulse signals by coupling two resonant circuits. In this approach, the primary resonant circuit is excited by a sinusoidal source while it is isolated from the secondary resonator with a switch. The secondary resonant circuit consisting of an electrically small antenna in series with a matching inductor initially rests in a zero state...
To alleviate the growing concern of energy waste in networked devices, we propose an energy saving strategy in the ``server-centric" data center network. Focusing on servers, we introduce a basic scheme based on the transition of automata. By changing efficiently from sleeping state to active state in different network traffic, servers save the energy. This scheme is self-adaptive and simple...
For a class of nonlinear discrete time system with fast time-varying or jumping parameters, a multiple models adaptive controller (MMAC) based on cluster-optimization is proposed. Based on the input-output data, the sample data are classified into several clusters by the fuzzy kernel clustering adaptive algorithm. Then the local models can be constructed corresponding clusters by the least square...
The traditional high frequency PWM ac choppers are usually controlled with the rms control method and are incapable of coping with the voltage transient variation. A type of instantaneous voltage compensation control scheme of a PWM ac chopper is proposed in this paper to suppress the voltage transient variations. The proposed control scheme consists of an output voltage rms control loop and an instantaneous...
This paper investigated the use of the dc-to-dc switching converter on a mobile snake-like robot. The mentioned dc-to-dc power converter would be the buck converter using IRF540N MOSFET by International Rectifier on continuous-conduction mode. Circuit simulations were performed, the circuit was constructed for comparison with a readily available buck converter in the market. The National Semiconductor's...
Traditional system reliability model is more concerned about discrete failure events, without considering the impact on reliability by system's continuous dynamic process. This paper presents a method of system reliability modeling based on Hybrid theory, which combines the continuous dynamic process and the discrete failure events together during the system, and make it easier to describe the impact...
To solve the voltage control problem of the STATCOM, a PI control scheme based on multiple models is proposed in this paper. This control scheme combines the multiple models to the PI control. PI controller structure is applied, and the scheme has the advantage of simple structure, short calculate time and easy realization. Meanwhile, the method of multiple models is applied to meet the accuracy and...
This paper addresses the stability analysis for switched neutral systems with time-varying delay under the arbitrary switching rule. By constructing the common Lyapunov functional, using the analysis technique of matrix inequalities, the delay-dependent stability criteria are presented, which are in terms of the linear matrix inequalities(LMIs). Finally, an illustrative numerical example is given...
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