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In this paper, a new approach to event-triggered H∞ performance analysis of linear networked control systems is proposed. First, a new parametrization of event-triggering scheme is designed, in which a positive diagonal parameter matrix with n elements (corresponding to the dimension of the system under consideration) is introduced, resulting in different weights for each state component. Under this...
High Throughput Satellite (HTS), which has large communication capacity, is being developed to meet the rising demand for satellite communication system at the time of disaster. However, HTS adopts static frequency resource allocation, hence it is difficult to effectively utilize frequency resources. Therefore, many technologies for effectively utilizing frequency resources have been developed. However,...
Determining key characteristics of High Performance Computing machines that allow users to predict their performance is an old and recurrent dream. This was, for example, the rationale behind the design of the LogP model that later evolved into many variants (LogGP, LogGPS, LoGPS, ) to cope with the evolution and complexity of network technology. Although the network has received a lot of attention,...
Modeling of Distributed Denial of Service (DDoS) attacks is a multidimensional problem as different resources are used at the same time. Existing DDoS attacks models analyze usage of only one resource as most attack relay on exhausting one specific resource. However intersection of legal user flaw and attacks or multiple attacks' flows requires a composite view to the problem. In this paper we present...
Self-adaptive applications are engineered to adapt to operation conditions to continuously meet application requirements at run-time. Before the emergence of Software Defined Networking (SDN) and new network virtualization technologies, the common run-time adaptation actions were limited to changes in computing and storage resources (i.e., scaling in/out). However, SDN creates new avenues for adaptation...
Robustness analysis method is proposed for rotorcraft pilot coupling with helicopter flight control system in loop. Combining with the lateral identification model of BO-105 helicopter, McRuer's pilot model, and the designed stability augmentation system, frequency domain model is established for rotorcraft pilot coupling analysis. μ analysis method and performance specifications in ADS-33E are adopted...
A suspended plate antenna (SPA) with L-probe feed is of interest as an efficient non-contacting feed method. It maintains high efficiency even when the plate is constructed of poorly conducting materials such as conductive inks. An SPA is designed at 10 GHz where fabrication tolerances can have an impact on performance. The SPA as designed has 36 percent impedance bandwidth and 8 to 9 dBi of gain...
In this paper, a bandpass filter (BPF) at 60 GHz band based on new design procedure is presented. The BPF is constructed by quartz-based post-wall waveguide (PWW) due to its lower dielectric loss. Filter design is achieved by optimization theory and burden for design is reduced by modeling filter as two dimensional structure. The 2D model is analyzed by using the method of moment (MoM) with global...
The concept of heterogeneous networks and small cells is likely to be a key addition to the fifth generation (5G) wireless communication standard, the prospect of which has motivated 5G researchers to investigate the coverage and integration of various small cells. Heterogeneous networks with small cells offer key benefits such as high frequency reuse, huge data rates and low power consumption for...
Indoor power line communication (PLC) plays a very crucial role in promoting the development of the smart grid (SG), and the influence will be further by integrating PLC with visible light communication (VLC). Since the integrated system is a time-varying channel due to the changing impedance of the indoor power line networks, it is necessary to obtain the random channel generator for the design of...
The vast majority of Internet traffic is carried by content delivery networks. A high potential to bring content even closer to consumers and to reduce energy cost is achieved by the nano data center (NaDa) concept that has been proposed in recent work. In this approach the capacity available on small devices such as home gateways is used to support content delivery in an hierarchical caching system...
Piezoelectric actuator is considered as the main device for the high precision positioning system due to its rapid response, high stiffness and ultra-high resolution. However, the intrinsic hysteresis behavior of piezoelectric actuator can seriously degrade the trajectory-tracking precision. Moreover, the model weights of the Prandtl-Ishlinskii (PI)'s play operator versus velocity are nonlinear which...
In this paper, the traditional equivalent electrical model of silicon photomultipliers (SiPMs) is profitably extended to include the important effects of the read-out electronics on the shape of the output pulse waveforms. An improved analytical expression has been developed, which accurately reproduces the fast detector ignition, the avalanche self-quenching and the slow recharging operations, also...
Power ramping is one of the mechanisms proposed to help alleviate congestion during random access in LTE cells. We evaluate its performance taking into account preamble SINR considerations as well as Physical Downlink Control Channel (PDCCH) deficiency. Our results show that power ramping can speed up access at small to moderate loads, but that it is actually detrimental at moderate to high loads,...
This paper analyzes the performance of passive time delay estimation with bandpass signals and generalizes the results of Weiss and Weinstein by considering a more general bandpass signal model with a parameter that allows for increasing the mean-squared bandwidth of the bandpass signal with respect to conventional flat bandpass signals. Analysis of the modified Ziv-Zakai lower bound shows (i) performance...
Packet-pair technique is a widely used method for characterizing end-to-end network paths. A new analytical model is presented for the packet-pair based signature that accurately describes the behavior of packet-pairs in multihop network paths with multiple tight links. The relationship between the input and output gaps of packet-pairs and the corresponding distribution of end-to-end packet-pair dispersions...
According to RSM Model and IPv6 QoS management system architecture, this paper verified that RSM model and the management systems based on it have an excellent delay and packet loss rate guarantee for corresponding flows with high priority through NS-2 simulation experiments, and they were suitable for end-to-end delivery for delay sensitive communication, especially for high priority communication,...
This paper proposes an approach to solve the problem of LTE EPS network parametric synthesis taking into account self-similar properties of multiservice traffic. The problem is solved with the known source data such as network topology, traffic routes, statistical data on the demand for information and communication services. The article proposes the calculation expressions to determine the parameters...
A new type of tri-axial piezoelectric accelerometer is proposed in this study. It consists of a seismic mass and four cantilever beams that is distributed in a shape of X. Analytical model and FEM analysis were conducted to study its charge sensitivity and the fundamental/first order resonance frequency in the Z-axis, X-axis and Y-axis direction. The errors between the calculated results from analytical...
A common practice for application developers is to experimentally determine the granularity of a task after a code has been parallelized based on the observed overhead of a runtime. Instead, we propose a new methodology based on an extended Roofline model to provide practical upper bounds on the throughput performance of an application. First, we extend the Roofline model to support not only latency...
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