Beyond eliminating the critical slowing down, multigrid algorithms can also eliminate the need to produce many independent fine-grid configurations for averaging out their statistical deviations, by averaging over the...
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Beyond eliminating the critical slowing down, multigrid algorithms can also eliminate the need to produce many independent fine-grid configurations for averaging out their statistical deviations, by averaging over the many samples produced in coarse grids during the multigrid cycle. Thermodynamic limits can be calculated to accuracy epsilon in just O(epsilon-2) computer operations. Examples described in detail and with results of numerical tests are the calculation of the susceptibility, the sigma-susceptibility, and the average energy in Gaussian models, and also the determination of the susceptibility and the critical temperature in a two-dimensional Ising spin model. Extension to more advanced models is outlined.
We consider novel molecular descriptors that are given as linear combinations of path numbers. The coefficients determining the linear combinations are defined as a function f(p(i)), where p(i) is the path of length i...
We consider novel molecular descriptors that are given as linear combinations of path numbers. The coefficients determining the linear combinations are defined as a function f(p(i)), where p(i) is the path of length i For different properties different f(p(i)) can be considered. In particular we consider function f(L-i), where L-i is the length of the path p(i). We illustrate the approach on octane isomers and consider in particular the octane number and the boiling points as their properties. For each case the function f(p(i)) has been separately optimized.
Health care visualization through Internet of Things(IoT)over wireless sensor network(WSN)becomes a current research attention due to medical sensor evolution of *** digital technology-based communication system is wi...
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Health care visualization through Internet of Things(IoT)over wireless sensor network(WSN)becomes a current research attention due to medical sensor evolution of *** digital technology-based communication system is widely used in all *** of medical thing(IoMT)assisted health-care application ensures the continuous health monitoring of a patient and provides the early awareness of the one who is suffered without human *** smart medical devices may consume with limited resources and also the data generated by these devices are large in *** IoMT based applications suffer from the issues such as security,anonymity,privacy,and *** overcome these issues,data aggregation methods are the solution that can concatenate the data generated by the sensors and forward it into the base station through fog node with efficient encryption and *** article proposed a well-organized data aggregation and secured transmission *** data generated by the sensor are collected and *** nodes(AN)received the compressed data and concatenate *** concatenated and encrypted data is forward to fog node using the enhanced Paillier cryptogra-phy-based encryption with Message Authentication code(MAC).Fog node extracts the forwarded data from AN using Fog message extractor method(FME)with *** proposed system ensures data integrity,security and also protects from security *** proposed model is simulated in Net-work Simulator 2.35 and the evaluated simulation results proves that the aggregation with MAC code will ensures the security,privacy and also reduces the communication *** node usages in between Aggregator and base station,will reduce the cloud server/base station computational overhead and storage *** proposed ideology is compared with existing data aggregation schemes in terms of computational cost,storage cost,communication cost and energy *** of communica
The intervals of electrohydrodynamic (EHD) Rayleigh-Taylor instability influenced by a periodic normal electric field producing surface charges are considered. It is shown that a linear model of the interface is gover...
The intervals of electrohydrodynamic (EHD) Rayleigh-Taylor instability influenced by a periodic normal electric field producing surface charges are considered. It is shown that a linear model of the interface is governed by Hill's differential equation. Characteristic values and intervals of stability are discussed. A special case of Mathieu differential equation type is obtained.
In this paper, we present a new hybrid binary version of bat and enhanced particle swarm optimization algorithm in order to solve feature selection problems. The proposed algorithm is called Hybrid Binary Bat Enhanced...
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We consider robust optimization for time-varying systems in terms of perturbations of fractional representations. Upper and lower bounds are given for the maximal radius of the operator ball around a given plant which...
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We consider robust optimization for time-varying systems in terms of perturbations of fractional representations. Upper and lower bounds are given for the maximal radius of the operator ball around a given plant which can be stabilized by a single compensator. In the time-invariant case, these numbers are equal.
Two kinds of net operations, addition and Cartesian production of P/T nets, are introduced. They are defined on the set of underlying net of P/T systems. The conditions for preserving structural proper- ties of Petri ...
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Two kinds of net operations, addition and Cartesian production of P/T nets, are introduced. They are defined on the set of underlying net of P/T systems. The conditions for preserving structural proper- ties of Petri net after these operations are discussed. It is shown that the set of P/T nets forms an Abelian group for net addition operation and the inverse net of a P/T net in usual meaning of net theo- ry is exactly the inverse of this P/T net as an element of the P/T net group; and that the set of P/T nets forms an Abelian ring for net addition and Cartesian product operations.
In this paper a new methodology for load balancing parallel processes on parallel systems is proposed. The problem of load balancing is considered to be an NP-hard optimization task. Taking static parallel finite elem...
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In this paper a new methodology for load balancing parallel processes on parallel systems is proposed. The problem of load balancing is considered to be an NP-hard optimization task. Taking static parallel finite element applications as a case study, the benefits and losses that follow from applying the methodology are studied. It is found that the proposed methodology can be especially useful for load balancing in asymmetric processor topologies, and therefore is of importance for work load balancing in workstation clusters.
In this paper we consider two limiting cases of the vertical propagation of hydromagnetic waves in a viscous and thermally conducting isothermal atmosphere permeated by a uniform horizontal magnetic field. It will be ...
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In this paper we consider two limiting cases of the vertical propagation of hydromagnetic waves in a viscous and thermally conducting isothermal atmosphere permeated by a uniform horizontal magnetic field. It will be assumed that the viscosity, thermal conductivity, and magnetic field strength are small, but that the effect of thermal conduction dominates in the first case, while in the second case it is the effects of the viscosity and the magnetic field which dominate. Since the equilibrium density decreases exponentially with height, all the diffusivities increase exponentially. In the first case it is convenient to consider the atmosphere divided into three distinct regions. In the lowest region the thermal diffusivity, kinematic viscosity and Alfven speed are small whereas in the uppermost region all these quantities are large. In the middle region the thermal diffusivity is large while the Alfven speed and the kinematic viscosity are still small. Therefore, in the lowest region the motion is adiabatic and in the middle region it is isothermal. The exponential increase of the thermal diffusivity with height transforms the oscillatory process from an adiabatic one in the lowest region, to an isothermal one in the middle region and creates a semitransparent reflecting layer between the two regions. The upper reflecting layer, which connects the two upper regions, is of a different type because it acts as an absorbing and reflecting layer. The existence of two reflecting layers will influence the reflection process in the two lower regions and the final conclusions depend on the relative effects of the kinematic viscosity with respect to that of the Alfven speed and on the relative locations of the two reflecting layers. In the second case the viscosity and the magnetic field combine to create a reflecting and absorbing layer. Thus there are two regions connected by a reflecting and absorbing layer. Below this layer all the diffusivities are small and the motion i
Let X be a non-commutative monoid with term order;let R be a commutative, unital ring;let I be an ideal in the non-commutative polynomial ring R(X);and let f is an element of R(X). In this setting the problem of deter...
Let X be a non-commutative monoid with term order;let R be a commutative, unital ring;let I be an ideal in the non-commutative polynomial ring R(X);and let f is an element of R(X). In this setting the problem of determining whether f is an element of I is studied. In a manner analogous to the commutative case, see Moller (1989), weak Grobner bases are defined and their basic properties are studied. We will see that in the non-commutative setting, when the coefficient ring is not a field, and when we enlarge the polynomial ring by adding more variables, weak Grobner bases may exhibit unpleasant behavior that has no analog in the commutative case. Quite in general for f is an element of R(X), it is undecidable whether f is an element of I. This follows from the fact that the word problem for free semigroups is undecidable. If I is generated by a recursively enumerable set, then we give a semi-decision procedure that halts if and only if f is an element of I. Finally we examine a class of nicely behaved ideals for which weak Grobner bases can be easly computed. (C) 1996 Academic Press Limited
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