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.
For modelling hybrid systems, we have extended Event B based on its framework with the differential event. The differential event describes continuous behaviors of hybrid systems by differential equations and evolution constraint, whose proof obligations provide dynamical properties of a model. In order to ensure the safety and reliability of a model, proof obligations should be proved. It is difficult...
An improved KNN text classification algorithm based on Simhash has been proposed by introducing Simhash and the average Hamming distance of adjacent texts as a unit, which solves the problems caused by data imbalance and the large computational overhead in the traditional KNN text classification algorithms. Experimental results demonstrate that the proposed algorithm performs a higher precision, a...
Molecular dynamics (MD) is a computer simulation method of studying physical movements of atoms and molecules that provide detailed microscopic sampling on molecular scale. With the continuous efforts and improvements, MD simulation gained popularity in materials science, biochemistry and biophysics with various application areas and expanding data scale. Assisted Model Building with Energy Refinement...
Varied trust management models for Ad hoc network had been proposed recently. However, there are rare method to evaluate these models making it is difficult to develop the most appropriate trust models in theory, and also it is difficult for a decision maker to choose an optimal trust model to implement in a concrete scene. In this paper, credibility evaluation of trust models based on fuzzy quantization...
Monte Carlo (MC) simulation plays an important part in dose calculation for radiotherapy treatment planning. Since the accuracy of MC simulation relies on the number of simulated particles histories, it's very time-consuming. The Intel Many Integrated Core (MIC) architecture, which consists of more than 50 cores and supports many parallel programming models, provides an efficient alternative for accelerating...
Modular exponentiations are widely used in discrete-log based cryptographic protocols. Most researches have been done for outsourcing exponentiation modular a prime, while less work has been done for outsourcing exponentiation modular a composite. In this paper, we first raise a new secure outsourcing algorithm for exponentiation modular a composite in the one malicious model. Then, we prove that...
The design of a substation grounding system that is surrounded by a number of backfill material (finite volumes of soil) with distinct resistivity values, such as a thin surface layer of crushed rock and paved surfaces is particularly complicated. The effects of such arbitrary finite volumes of backfill material and heterogeneous soil have been studied in this paper. The numerical solution of a boundary...
Single-node computation speed is essential in large-scale parallel solutions of particle transport problems. The Intel Many Integrated Core (MIC) architecture supports more than 200 hardware threads as well as 512-bit double precision float-point vector operations. In this paper, we use the native model of MIC in the parallelization of the simulation of one energy group time-independent deterministic...
A network consisting of a substation including its buried and aboveground components and its overhead transmission lines is analyzed using rigorous electromagnetic fields based analysis. The entire system is modeled and its performance during steady-state normal conditions and fault conditions is examined and discussed. A long section of a buried pipeline is also parallel to the transmission lines...
Over the last decade, with the increasing performance and programmability of Graphics processing unit (GPU), these units have evolved from specialty hardware to massively parallel general computation devices. Simulation of neutron transport plays an important role in national economical construction and large-scale computing in science and engineering. MC (Monte Carlo) simulation of neutron transport...
The waste collection vehicle routing problems with time windows and intermediate facilities (WCVRPTW-IF) is actually belong to a well-known generalization of VRP, the Multi-Depot Vehicle Routing Problem with Inter-Depot Routes (MDVRPI), which is a combinatorial optimization problem and holds a central place in reverse logistics management. in order to improve the route compactness, which is very important...
Web access mode is the most popular and effective way to share resources between universities nowadays. Considering the opening and complexity of the Internet, Secure and authorized access resources method becomes a key problem. This paper proposed an access control mechanism based on RBAC (Role Based Access Control) for information and telecommunication resources sharing. Then, a resource sharing...
Cloud computing emerges as one of the hottest topic in field of information technology. Cloud computing is based on several other computing research areas such as HPC, virtualization, utility computing and grid computing. In order to make clear the essential of cloud computing, we propose the characteristics of this area which make cloud computing being cloud computing and distinguish it from other...
The collection vehicle routing problems with intermediate facilities (CVRP-IF) is actually belong to a well-known generalization of VRP, the Multi-Depot Vehicle Routing Problem with Inter-Depot Routes (MDVRPI), which is a combinatorial optimization problem and holds a central place in reverse logistics management, such as waste collection management. This paper presents an improved multiple ant colony...
In this paper, we present a new spectrum-hole prediction model for cognitive radio (CR) systems based on the IEEE 802.11 wireless local areas networks. We have also analyzed the distribution of interval between two consecutive packets (ITCP) based on a simple two-user network. For multiuser networks, we have investigated the distribution of ITCP and study its characteristics using Bayesian inference...
The Embarrassingly Parallel (EP) is one kernel benchmark of NAS Parallel Benchmarks (NPB) which are a set of programs designed to help evaluate the performance of parallel supercomputers. In the EP benchmark, two-dimensional statistics are accumulated from a large number of Gaussian pseudo-random numbers, which produced by Linear Congruential Generator (LCG). In this paper, we present the design and...
In this paper, we introduce an open source toolbox named Flexibot for modeling and simulation of flexible manipulators. Flexibot is based on open-sourced scientific computation and simulation software Scilab/Scicos and Modelica. The whole toolbox consists of symbolic derivation, parameter computation, and block generation as well as simulation module. Users are not only able to use our presented block...
Flight delay is a nondeterministic problem. Modeling and estimating flight delay is very important in the flight delay research. It is also the precondition to calculate delay propagation. A new Bayesian network structure learning algorithm, named target-fixed stochastic-ordered K2(TSK2), has been proposed in this paper. After using this new algorithm to build the Bayesian network of flight delay,...
A Mesic respiratory system parameter identification is studied in this paper for providing the useful theory and data support in the improvement of human respiratory model accuracy, respiratory disease diagnosis and design of the new ventilator. The Mesic respiratory system model is established based on Simulink platform. The least-square algorithm is then used to do the static and dynamic parameter...
In this paper an area signal control model based on temporal planning is presented. Every activity of area signal control is modeled using planning domain definition language, and then the domain model of area signal control is established. Aiming at the representation problem of resource and time in the area signal control model, we extended the basic activity model by adding resource constraint...
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.