The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper, an improved Bundle Pricing model was developed in the internet wireless pricing scheme to serve multiple QoS networks. The model formed is a combination of Bundling problem model, consumer problem and quasi-linear utility function on multiple QoS network. The model used is solved with the aid of LINGO 13.0 program to get optimal solution. Based on the results of each case, both ISP...
To satisfy growing computational demands of modern applications, significant enhancements have been introduced in the contemporary processor architectures with the aim to increase their attainable performance, such as increased number of cores, improved capability of memory subsystem and enhancements in the processor pipeline [1]. Therefore, the performance improvements are usually coupled with an...
Disasters, such as earthquake, tsunami, tornado, and malicious attack, may cause large-area, geographically correlated and/or cascading failures in telecom networks, leading to massive connection disruptions and instability of network state. In this paper, we study survivability strategies to alleviate the effect of disasters to telecom networks, e.g., Wavelength-Division-Multiplexing (WDM) optical...
In this paper, we propose a novel active disturbance rejection controller(ADRC) based on Kalman observer for permanent magnet synchronous motor(PMSM) speed-control system. The performance of the ADRC controller is mainly depending on the capacity of the extended state observer(ESO). However, the bandwidth of the ESO is usually limited by the existence of noise, and the amplitude of the total disturbance...
When local identification of a nonstationary ARX system is carried out, two important decisions must be taken. First, one should decide upon the number of estimated parameters, i.e., on the model order. Second, one should choose the appropriate estimation bandwidth, related to the (effective) number of input-output data samples that will be used for identification/tracking purposes. Failure to make...
With the rapidly growing of geo-distributed applications in the Internet, there is a huge amount of data generated in geo-distributed datacenters everyday. However, because of region privacy concerns and limitation of inter-DC WAN bandwidth, moving all the geo-distributed data to a single datacenter for centralized processing is not practical. Therefore, we intend to process the data where it generates...
The offers on cloud computing infrastructure have focused on providing computing and storage resources, and consider the network mostly as a required add-on and not truly as a resource itself. However, the need to have more robust solutions is becoming clearer. This paper argues that cloud infrastructure services will evolve and allow the definition of complete infrastructures that comprise both computing...
The study is a consideration of the PSK-n signal passage through a tuned resonant filter with a limited bandwidth. It is shown that the capacity is limited in the absence of noise and in the presence of intersymbol interference.
The paper analyses the outcomes of numerical studies into the effect of phase dispersion on broadband elements of a FMCW signal with varying central spectrum frequencies corresponding to the central frequencies of radio channels. We used the International Reference Ionosphere (IRI) model as the background ionosphere, which takes into account the spatiotemporal variability of the radio channel. The...
Modulation responses of a 3s-DBR laser are studied by numerical simulations, which are based on calculation of transient impulse response of the device with the developed TWDM model. Simulated results indicate that this method provides an effective way to estimate modulation bandwidth of the 3s-DBR laser.
A major difficulty in multifrequency atomic force microscopy (MF-AFM) is the accurate estimation of amplitude and phase at multiple frequencies for both z-axis feedback and material contrast imaging. A lock-in amplifier is typically chosen for its narrowband response and ease of implementation. However, its bandwidth is limited due to post mixing low-pass filters and multiple are required in parallel...
Today, in the cloud computing context, the network is starting to arise as a true resource itself and not just as a required connectivity add-on. The ability to define network resources (e.g. routing/switching elements, bandwidth) in this context is still scarce, but there are clear evidences that this is a future reality. In this article, we consider that cloud infrastructure services will allow...
In this paper the synthesis of balance control is presented. The postural equilibrium condition is introduced using a simplified model of a humanoid robot body. Next the problem of disturbances rejection control (DRC) using dedicated controller is discussed. The simulation experiments with the DRC are described, and the system behavior during different disturbances is summarized. The paper ends with...
Gather/scatter are state of the art vector memory access modes in Vector-SIMD architectures. However, because of the stochastic and complicated properties, the hardware design of gather/scatter operations lacks theoretical analysis and modeling. This paper proposes a model for gather/scatter operations on local vector memory for the first time. The model can not only give all the possible distributions...
This paper presents the novel concept of the fully differential operational floating conveyor (FD-OFC) for the first time, to the best of the authors knowledge. A CMOS design for the proposed FD-OFC is introduced as an 8 (4x4) port general purpose analog building block. The proposed design has the advantage of low power consumption as it can operate under biasing conditions of only 1.5 V, while its...
This paper deals with virtualised Network Function Placement and chaining over cloud and NFV environments. We propose a polynomial-time algorithm for joint VNF chain placement that is based on a recursive optimization approach. The key idea is to benefit from the robustness of the recursion paradigm that was used to solve many optimization problems. We demonstrate the potential of our solution by...
It is expected that future cellular networks will be densely deployed with both macro cells and small cells to meet the ever-increasing traffic demand, and a cost-effective and reliable backhaul connectivity will be essential to such deployment scenarios. As wired backhaul solutions may not be always practical or feasible, in this paper we consider wireless in-band backhaul for a network with macro...
To improve the dynamic performance of voice coil motor, a single position loop control method based on active disturbance rejection control is proposed in this paper. The feedback law is sufficiently analyzed and well designed considering both sinusoidal input and step reference input. Moreover, stability analysis is conducted on the basis of a state-space model and Routh-Hurwitz criterion, which...
Currently, researchers use simulators to experimenttheir innovation on emerging non-volatile memory. Unfortunately, simulation method is both time-consuming andare hard to debug. In this paper, we present a non-volatile memory emulatorwhich enables system-level research on emerging memory. Ouremulator uses performance monitoring units on off-the-shelfprocessors to implement an accurete performance...
Multicast can jointly utilize the network resources when delivering the same content to a set of destinations; hence, it can effectively reduce the consumption of network resources more than individual unicast. The source of a multicast, however, does not need to be in a specific location as long as certain constraints are satisfied. This means the multicast can have uncertain sources, which could...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.