Clasificación del consumo de combustible con base a la identificación de los modos de material rodante

El artículo presenta los resultados de un estudio de tecnología innovadora para mejorar el racionamiento del consumo de combustible diesel en el material rodante de la industria ferroviaria. Como objeto de investigación, se estudió el consumo de combustible en una edición diesel Automotrisa - ADE-1, que se utiliza en las instalaciones de electrificación y suministro de energía de la Dirección de Transenergo. Transporte de carga en carro motorizado (MLT - 6), que se utiliza en la economía de la vía. Sobre la base de una serie de documentos reglamentarios de la compañía de ferrocarriles de Rusia, se encomendó a la Universidad Estatal de Transporte Ferroviario de Samara el análisis de la eficiencia del consumo de combustible de SSPS en este tipo de material rodante en uno de los vertederos ferroviarios. El material rodante autopropulsado especial de la empresa Russian Railways fue estudiado como objeto de investigación. Se considera el método de formación de estándares de consumo de combustible mediante la identificación de los valores reales del consumo de combustible y los indicadores de los modos de funcionamiento del material rodante. Los métodos estadísticos utilizados en la investigación nos permiten establecer la tasa de consumo en el rango del 8% de la tasa de flujo real. Sobre la base del uso de la tasa de consumo de combustible obtenida, se proporciona un método para identificar y evaluar el nivel de gastos excesivos de combustible no autorizados (drenaje)

Excitation of Forbidden Electronic Transitions in Atoms by Hermite–Gaussian Modes

Photoexcitation of trapped ions by Hermite–Gaussian (HG) modes from guided beam structures is proposed and investigated theoretically. In particular, simple analytical expressions for the matrix elements of induced atomic transitions are derived that depend both on the parameters of HG beams and on the geometry of an experiment. By using these general expressions, the (Formula presented.) electric octupole (E3) transition is investigated in an Yb+ ion, localized in the low–intensity center of the HG10 and HG01 beams. It is shown how the corresponding Rabi frequency can be enhanced by properly choosing the polarization of incident light and the orientation of an external magnetic field, which defines the quantization axis of a target ion. The calculations, performed for experimentally feasible beam parameters, indicate that the achieved Rabi frequencies can be comparable or even higher than those observed for the conventional Laguerre–Gaussian (LG) modes. Since HG-like modes can be relatively straightforwardly generated with high purity and stability from integrated photonics, these results suggest that they may form a novel tool for investigating highly-forbidden atomic transitions

Automation of diesel fuel consumption accounting on a special self-propelled rolling stock of Russian Railways

The article provides the results of a study to assess the effectiveness of automation of diesel fuel consumption accounting for a certain type of special self-propelled rolling stock of the company Russian Railways. The main current provisions of the fuel consumption assessment are considered. It is proposed to supplement the provisions on the adjustment of fuel consumption standards by identification methods. The identification method includes monitoring actual values, performance indicators, rolling stock mileage and fuel consumption forecasts. The analysis showed that the efficiency of fuel consumption automation can be as high as 30%. The effect is achieved by fulfilling the forecast fuel consumption standards and eliminating unauthorized fuel overruns

Electronic structure of the full-Heusler Co

We present a combined investigation of the electronic structure of bulk arc-melted full-Heusler Co$$_{2-x}$$Fe$$_{1+x}$$Si (x = 0, 0.5, 1) and CoFeSi alloys using density functional theory and ultrasoft X-ray emission spectroscopy. We perform first-principles calculations of the spin-polarized total and partial density of states for the Co and Fe 3d (s, p) as well as for the Si 3s (p, d) orbitals. It is demonstrated that only Co$$_{2}$$FeSi alloy exhibits a half-metallic behavior. However, the inverse CoFe$$_{2}$$Si alloy shows pseudogap and high spin polarization at the Fermi level. We carry out ultrasoft X-ray emission Si $$L_{2,3}$$ measurements, which provide the information about the local partial density of states of Si 3s and 3d orbitals in the valence band localized on Si atoms. We compare the measured spectra with our theoretical calculations and discuss them in terms of the contribution of s and d-electrons to the bonding. The Si and transition-metals sd and dd bonding formation is shown in the Co$$_{2-x}$$Fe$$_{1+x}$$Si and CoFeSi alloys. The high spin polarization values, along with the extremely high Curie temperature, make these compounds potential candidates for spintronic applications