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 we consider the ice ball formation in a multi-probe cryosurgical procedure. By representation of collocation polynomials and visualisation of individual ice ball formation the radius of thermal propagation from the cryoprobe tip centre can be investigated. This serves as the basis for optimisation of cryoprobe placement to the targeted tissue or the surgeon's decision for the cessation...
Coplanar camera calibration is the process of determining a set of calibration parameters that describe the mapping between 2D control points and 2D image coordinates. However, the optimal solution for coplanar calibration can be obtained by solving a set of constrained optimization problem. This paper presents a technique to determine the calibration parameters for coplanar calibration, where a set...
Markov random field (MRF) is extensively used in model-based segmentation of textured images. In this paper, we propose a coupled MRF model and adopt the MAP-MRF framework to solve the semi-supervised segmentation problem. The observed image and the desired labeling are characterized by the conditional Markov (CM) model and the multi-level logistic (MLL) model, respectively. The parameters of CM models...
Since the emergence of W-CDMA technology as an air interface of 3G mobile communication systems, extensive researches have been carried out to improve the performance of these systems. Most of these works show that the soft handover technique plays an important role in improving W-CDMA system performance. Several algorithms were developed to meet certain requirements of system such as capacity improvement,...
This paper presents a novel logic synthesis and technology mapping approach for Actel-1 MUX-based Field Programmable Gate Arrays (FPGAs) for low power and high performance applications. To deal with functions of large number of variables, decomposed BDD representation has been used. As there is one-to-one correspondence between the BDD representation and the 2-to-l MUX realization, BDD representation...
To develop a good reliable software system, a project manager must determine in advance how to effectively allocate these resources. Due to the dynamic properties of the system and the insufficiency of the failure data, the accurate parameter values are hard to determine. Therefore, the sensitivity analysis is often used in this stage to deal with this problem. In this paper, we study two optimal...
This paper presents the application of a machine learning technique (neural networks) to the problem of optimising the traffic flows (label switched path placement) within telecommunications networks using multi-protocol label switching (MPLS). It is shown here that the machine learning technique achieves very fast computation of accurate solutions to the problem of placing label switched paths in...
The quality of future network services can be guaranteed with appropriate pricing and packet scheduling schemes. In this paper a closed form formula for updating adaptive weights of a packet scheduler is derived from a revenue-based optimization problem. The algorithm ensures bandwidth as a quality of service (QoS) requirement and optimizes revenue of the network service provider. We derive and prove...
The exchange of network state beacons (NSBs) is crucial to monitoring the dynamic state of MANETs like sensor networks. The rate of beacon exchange (FX) and the network state define both the time and nature of a proactive action to reconfigure the network in order to combat network performance degradation at a time of crisis. It is thus essential to select the FX within optimized bounds, so that minimal...
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.