A connection between a unitary quantization scheme and para-Fermi statistics of order 2 is considered. An appropriate extension of Green's ansatz is suggested. This extension allows one to transform bilinear and t...
We study the lepton flavor violating (LFV) e(μ)−τ conversion in deep inelastic scattering (DIS) of electrons (muons) on fixed-target nuclei. Our model-independent analysis is based on the set of low-energy effective...
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We study the lepton flavor violating (LFV) e(μ)−τ conversion in deep inelastic scattering (DIS) of electrons (muons) on fixed-target nuclei. Our model-independent analysis is based on the set of low-energy effective four-fermion LFV operators composed of leptons and quarks with the corresponding mass scales Λk for each operator. Using the estimated sensitivity of the search for this LFV process in events with large missing energy in the NA64 experiment at the CERN SPS, we derive lower limits for Λk and compared them with the corresponding limits existing in the literature. We show that the DIS e(μ)−τ conversion is able to provide a plenty of new limits as yet nonexisting in the literature. We also analyzed the energy spectrum of the final-state τ and discussed the viability of the observation of this process in the NA64 experiment and ones akin to it. The case of polarized beams and targets is also discussed.
We provide a triple of diagonal Latin squares of order 10 that is the closest to being a triple of mutually orthogonal diagonal Latin squares found so far. It was obtained by constructing all orthogonal mates for diag...
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We calculate the electromagnetic Pauli form factor of quark induced by the nontrivial topological fluctuations of QCD vacuum called instantons. It is shown that such a contribution is significant. We discuss the possi...
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We calculate the electromagnetic Pauli form factor of quark induced by the nontrivial topological fluctuations of QCD vacuum called instantons. It is shown that such a contribution is significant. We discuss the possible implications of our result in the photon-hadron reactions and in the dynamics of quark-photon interactions in the dense/hot quark matter.
In this paper we consider the problem of enumerating diagonal Latin squares of small order. In particular we discuss possible algorithmic approaches to this problem and show our results in this regard. Surprisingly, o...
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The aim of the study is to develop tools of increasing a problem solving reliability in a heterogeneous distributed computing environment by applying a diagnostics of computing resources components and using an analys...
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The aim of the study is to develop tools of increasing a problem solving reliability in a heterogeneous distributed computing environment by applying a diagnostics of computing resources components and using an analysis of problem solving schemes. A scheme (a plan) is an abstract program for a problem solving. A special attention is paid to the calculation of a problem solving scheme reliability on the basis of a logical-probabilistic method. This method is based on transiting from Boolean functions for a reliability description of a problem solving scheme to probability functions for determining indicators of such reliability. Improving a problem solving scheme reliability is carried out by a resource reservation. The resource reservation applied in a problem solving scheme provides obtaining of a reliability indicator that approximates maximally the predetermined criterion of reliability, taking into account limitations on a number of reserve resources. The example of the problem solving scheme and calculating its reliability is represented.
One of the promising approaches to the efficient management in a heterogeneous distributed computing environment is the use of multi-agent systems. When researchers want to solve tasks in such an environment, they nee...
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One of the promising approaches to the efficient management in a heterogeneous distributed computing environment is the use of multi-agent systems. When researchers want to solve tasks in such an environment, they need utilities for the description of the processing in the specific domain, and knowledge about a software-hardware infrastructure. This multi-component knowledge is used for effective decision-making. Practice and experience of multi-agent systems show that knowledge representation is non-trivial problems. We proposed an approach to the design of the conceptual model of a heterogeneous distributed computing environment based on multi-agent management. An important component of the model is algorithmic knowledge, which provides the support of planning, resources allocation and dynamic decomposition of a problem to subproblems. This knowledge is represented as a semantic network, which describe semantic relations between concepts. Unlike to Semantic Web Services and Semantic Grids, our approach provides advanced planning abilities to support parallelism and scalability. We develop specialized high-level tools for designing and using the conceptual models.
We suggest an approach to solve the dynamic patrolling problem as the variation of periodic vehicle routing problem with time windows. In order to do this, firstly a set of waypoints (targets) should be located in spa...
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We suggest an approach to solve the dynamic patrolling problem as the variation of periodic vehicle routing problem with time windows. In order to do this, firstly a set of waypoints (targets) should be located in space in such way that their spherical neighborhoods, which corresponds to the size of the robots vision/detections fields, would form a complete coverage of the protected perimeter. Regular inspections of each waypoint by robots of the group not less than once during specified period would guarantee the effective perimeter patrolling. Thus, the routing problem is to a feasible group route ensuring well-timed inspections for all waypoints of the mission. To solve the described problem we propose a hybrid approach, based on the combined use of genetic algorithms and methods and heuristics of local search. The proposed approach allows robots to effectively generate required solutions under given constraints and quickly readjust it in unforeseen situations due to the dynamic nature of the problem. A software modeling system implementing all the necessary computational procedures has been developed; the results of computations are given.
We study the Lepton Flavor Violating (LFV) e(μ) - τ conversion in Deep Inelastic Scattering (DIS) of electrons (muons) on fixed-target nuclei. Our model-independent analysis is based on the set of low-energy effecti...
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This work focuses on the development of models, methods, and tools to increase a fault tolerance of high-performance computing systems. The described models and methods are based on automatic diagnostics of the basic ...
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This work focuses on the development of models, methods, and tools to increase a fault tolerance of high-performance computing systems. The described models and methods are based on automatic diagnostics of the basic software and hardware components of these systems, the use of automatic localization, correction of faults, and the use of automatic HPC-system reconfiguration mechanisms. The originality and novelty of the offered approach consist of creating the multi-agent system with universal software agents, capable of collecting node state data for analysis and thereby enabling the agent to make the make necessary decisions directly.
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