Comparative analysis of diamond-like carbon and metal-carbon X-Ray mirrors
The characteristics of RAP crystal, metal-carbon multilayer X-ray mirror and diamond-like carbon (DLC) X-ray mirror are compared/ The advantages of DLC mirrors in resolution power are described. Temperature and radiation influence on the reflectivity and bandwidth of Bragg peak for diamond-like mirrors are studied. It is shown that the parameters of DLC mirrors after annealing in vacuum are stable up to 570 C.
Ways to improve the sensitivity and signal-to-noise ratio of primary converters in each case have their fundamental and practical limitations. To determine the optimal frequency of the electromechanical conversion and ensure the specified accuracy and stability of metrological characteristics are encouraged to use the method of probabilistic stability studies of the output characteristic of the converter. The research is based on the methods of the stability characteristics of the probabilistic stability studies, provides the most comprehensive account of the random nature of the structural abnormalities and electrical parameters under the influence of destabilizing factors in serial production. Formed the basis of the method of moments technique allows for a small amount of calculations to obtain the necessary accuracy.
The dynamics of a two-component Davydov-Scott (DS) soliton with a small mismatch of the initial location or velocity of the high-frequency (HF) component was investigated within the framework of the Zakharov-type system of two coupled equations for the HF and low-frequency (LF) fields. In this system, the HF field is described by the linear Schrödinger equation with the potential generated by the LF component varying in time and space. The LF component in this system is described by the Korteweg-de Vries equation with a term of quadratic influence of the HF field on the LF field. The frequency of the DS soliton`s component oscillation was found analytically using the balance equation. The perturbed DS soliton was shown to be stable. The analytical results were confirmed by numerical simulations.
Radiation conditions are described for various space regions, radiation-induced effects in spacecraft materials and equipment components are considered and information on theoretical, computational, and experimental methods for studying radiation effects are presented. The peculiarities of radiation effects on nanostructures and some problems related to modeling and radiation testing of such structures are considered.
This volume presents new results in the study and optimization of information transmission models in telecommunication networks using different approaches, mainly based on theiries of queueing systems and queueing networks .
The paper provides a number of proposed draft operational guidelines for technology measurement and includes a number of tentative technology definitions to be used for statistical purposes, principles for identification and classification of potentially growing technology areas, suggestions on the survey strategies and indicators. These are the key components of an internationally harmonized framework for collecting and interpreting technology data that would need to be further developed through a broader consultation process. A summary of definitions of technology already available in OECD manuals and the stocktaking results are provided in the Annex section.