This paper presented the dynamic characteristics and sensitivity analysis of the shaft of test machine based on finite element method and orthogonal design method. It is concluded that the top eight order natural frequencies (Hz) are 1673.3, 3666.6, 4421.8, 5713.8, 6612.9, 6656.8, 9550.9, 9617.5 based...

In coal shearer monitoring system, the early detecting of fault is key technique for preventing the shearer fail. In this paper, the improved support vector machine theory is introduced to detected shearer fault under the mine underground, the improved algorithm based on support vector machine theory...

Weibull distribution life prediction theory is proposed for analyzing fault diagnosis of scraper conveyor in this paper. The scraper conveyor of coal mining mechanization is one of the important equipments in coal producing process, which may be damaged in the operation of the equipment malfunction or...

In order to study the response of pavement to the multi-axle vehicle dynamic load, three-dimensional finite element analysis model of asphalt pavement under a multi-axle vehicle dynamic load was established. The structure of asphalt pavement simplified to four layers. The material of asphalt surface...

In this study, gaseous pollutants from three Euro-IV diesel buses equipped with urea selective catalytic reduction (SCR) system were investigated using portable emission measurement system (PEMS) in real world operating conditions. A work-based window method was applied to calculate on-road brake-specific...

Increasing demands on strict geometry and dimensions requirements of plastic parts need systematic research in the injection moulding field with impact on dimension stability. This work is focusing on optimization of the chosen processing parameters and their mutual interaction. The aim is to reach as...

The paper focuses on the base cavity configuration of the projectile. The effect of the cavity length on the aerodynamic force of the projectile with base cavity is investigated numerically. With the supersonic flow field of the projectile simulating, the distributions of the flow field parameters and...

This article describes a new method of measurement and determination of an average concentration of gaseous components of flue gases at the boiler output, which is based on the use of equipment for continuous network sampling and analysis of gaseous pollutants, developed at the VŠB-TU Ostrava for the...

This paper proposes an effective method for improving the processing quality and speed of Moiré pattern segmentation. The method involves using quantum-behaved particle swarm optimization(QPSO) based on two-dimensional (2D) entropy theory.First, the beat phenomena generated by grating interference, also...

The heat transfer and turbulent flow inside U-tubes in steam generator (SG) are studied. A flow model based on one-dimensional Oberbeck-Boussinesq equation is proposed and improved to analyze the phenomenon of reverse flow. The relationship between the mass flow velocity and pressure drop is established,...

SAE J1939 is one of the most widely used application layer protocols in automotive industry based on CAN bus. SAE J1939 defines vehicle application layer to make us read the status of the vehicle easily. We propose an improved RBF neural network fault classification algorithm to classify diesel engine...

This paper describes a computational study to determine the aerodynamic coefficients at subsonic and supersonic speeds using an unstructured flow solver. The paper presents results of investigation of a flow over 155 mm artillery projectile M107 and the performance of the ANSYS FLUENT computational code....

Recently, room-temperature ferromagnetism was reported in Cu-doped AlN film. However, a systematic study on the magnetic mediation of intrinsic vacancy is still absent and the origin of ferromagnetism of Cu-doped AlN remains unclear. We investigate the magnetic properties of Cu-doped AlN by first-principles...

This paper proposes a new type of splice joint, named flange bolted-welded hybrid joint, which is designed to splice I-shape beam to facilitate the construction of industrialized buildings. The flange, welded with the bottom beam flange as well as the web close to bottom flange, are jointed by high strength...

The key to the complex sensor detection(such as the non homogenous strain detection) of the fiber Bragg grating(FBG) is the demodulation of FBG reflectance spectrum. This paper designs the demodulation system which is based on the optical low coherence reflectometry(OLCR) princple. The system is mainly...

Energy supply is one of the essential concerns for spacecrafts in space, which directly effects the expected lifespan of the spacecrafts. Solar energy, which is just second to nuclear energy, is almost the most convenient and secure sources of energy for spacecrafts in orbit. Main Influence intervals...

The PcBN materials were sintered from the cBN-Al systems under high-pressure and high-temperature, and the mechanical properties, composition and microstructure of prepared samples were analyzed. The results show that the microstructure is fairly even and the binding phase is uniformly distributed in...