MATHEMATICAL MODEL FOR CALCULATING ENERGY CLASS, INTENSITY AND MAGNITUDE OF THE EARTHQUAKE REAL TIME

The mathematical dependence, allowing a nomogram based on T.G. Rautian calculates real-time energy class, magnitude and intensity of earthquakes

Trigonal-bipyramidal Anion [Ph2Cl3Sn]- in the Structure of N-[(Diethylphosphoryl)methyl] piperidinium Diphenyltrichlorostannate(IV)

Crystal structure of N-(diethylphosphoryl)methyl-piperidinium diphenyltrichlorostannate(IV), C10H23NO3P+ C12H10Cl3Sn- has been determined, a = 11.416(2), b = 11.582(2), c = 12.491(2) Å, α = 69.82(2), β = 81.22(2), γ = 60.73(2)°, space group P1̅, 4493 reflections, R(F) = 0.0271, wR(F2) = 0.0712. The structure consists of isolated trigonal-bipyramidal anions and hydrogen-bonded dimers formed by cations. The impact of secondary Sn⋅⋅⋅Cl interactions on the geometry of complex anions is discussed

Modos de melhorar a gestão ambiental através da introdução de produtos biocombustíveis na economia da russa

Environmental management plays a central role in the social and economic development of today's world. Its key problems can be solved by using more effective methods of encouraging economic entities to find the most effective ways of introducing biofuel products in their production cycle. The article discusses these ways and methods and justifies the strategy of increasing biofuels production in Russian regions. The structure and algorithms of building a new green economy in Russia are revealed, and economic risks and opportunities for the biofuel products introduction are identified within the framework of the improvement of national environmental management efficiency. In our study we have used the analytical, expert and system-economic research methods. La gestión ambiental juega un papel central en el desarrollo social y económico del mundo de hoy. Sus problemas clave pueden resolverse utilizando métodos más efectivos para alentar a las entidades económicas a encontrar las formas más efectivas de introducir productos de biocombustibles en su ciclo de producción. El artículo analiza estas formas y métodos y justifica la estrategia de aumentar la producción de biocombustibles en las regiones rusas. Se revelan la estructura y los algoritmos de construcción de una nueva economía verde en Rusia, y se identifican riesgos y oportunidades económicas para la introducción de productos de biocombustibles en el marco de la mejora en la eficiencia de la gestión ambiental nacional. En nuestro estudio, hemos utilizado los métodos de investigación analítica, experta y económica del sistema.A gestão ambiental desempenha um papel central no desenvolvimento social e econômico do mundo atual. Seus principais problemas podem ser resolvidos usando métodos mais eficazes para incentivar entidades econômicas a encontrar as formas mais eficazes de introduzir produtos de biocombustíveis em seu ciclo de produção. O artigo analisa essas formas e métodos e justifica a estratégia de aumentar a produção de biocombustíveis nas regiões russas. A estrutura e os algoritmos para a construção de uma nova economia verde na Rússia são revelados, e riscos econômicos e oportunidades para a introdução de produtos de biocombustíveis são identificados no âmbito da melhoria da eficiência da gestão ambiental nacional. Em nosso estudo, utilizamos os métodos de pesquisa analítica, especializada e econômica do sistema

(1R,2R,3R,4S,5S)-3-Methyl-8-oxa­bicyclo­[3.2.1]oct-6-ene-2,4-diyl diacetate

The mol­ecule of the title compound, C12H16O5, has crystallographically imposed mirror symmetry with the mirror plane passing through the endocyclic O atom and the mid-point of the double bond. In the crystal, mol­ecules are linked by C—H⋯O hydrogen bonds, forming chains running along the a axis

Stability of the inverse resonance problem on the line

In the absence of a half-bound state, a compactly supported potential of a Schr\"odinger operator on the line is determined up to a translation by the zeros and poles of the meropmorphically continued left (or right) reflection coefficient. The poles are the eigenvalues and resonances, while the zeros also are physically relevant. We prove that all compactly supported potentials (without half-bound states) that have reflection coefficients whose zeros and poles are \eps-close in some disk centered at the origin are also close (in a suitable sense). In addition, we prove stability of small perturbations of the zero potential (which has a half-bound state) from only the eigenvalues and resonances of the perturbation.Comment: 21 page

3-exo-Chloro-8-oxabicyclo­[3.2.1]oct-6-ene-2,4-diol chloro­form 0.33-solvate

The title compound, 3C7H9ClO3·CHCl3, crystallizes with mol­ecules of 3-exo-chloro-8-oxabicyclo­[3.2.1]oct-6-ene-2,4-diol (A) and chloro­form in a 3:1 ratio, in the space group R3m. Mol­ecules of A straddle a crystallographic mirror plane, whereas the chloro­form mol­ecules (C and H atoms) lie additionally on the threefold axis. The mol­ecules of A are linked into right- and left-helical chains by means of O—H⋯O hydrogen bonds, thus forming columns running along the c axis. Six inter­penetrated columns form a channel in which the solvent mol­ecules (chloro­form) are located

MOTOR ACCELERATION TIME OPTIMIZATION BY THE CHANGE OF THE SUPPLY VOLTAGE VALUE

Abstract. It is proved that the deviation of the voltage from the nominal values, often leads to overheating of the motor windings, which reduces the insulation life to a great extent.The task of determining the change in the acceleration time of the motor depending on the switching time of its supply voltage is set. The modeling of DC motor 2ПН132М operation in the short- run changes in starting voltage from 380 V to 220 V - which is its nominal value-is carried out. By sweep method is determined the optimum time for switching the supply voltage of the motor. Mathematical dependencies and simulation results are presented

4-Chloro-2-[(E)-(4-nitro­phen­yl)diazenyl]phenol

The title compound, C12H8ClN3O3, in the crystalline state and in solution, exists in the azo form, as predicted by density functional theory (DFT) calculations. The mol­ecule is approximately planar [the dihedral angle between the rings is 1.83 (8)°], with the nitro group slightly twisted [13.4 (2)°] relative to the benzene ring. Translationally related mol­ecules form stacks along [010] with an inter­planar distance of 3.400 (2) Å. The hydroxy group forms an intramolecular hydrogen bond with the azo N atom