Large scale, discrete element simulations are performed to study the dynamics of a rotating drum partially filled with cohesive granular particles. The continuous avalanche regime is explored using a simple model for interparticle cohesion in order to simulate the effects of granular media in the presence of a wetting fluid. The shape of the free surface for cohesionless particles ranges from f...

Drum shell bearing edges dictate the boundary conditions and point of contact between drum heads and drum shells. Properties of single 45o, single 45o with slight round-over, and double 45o bearing edges have been studied. It has been found that the double 45o drum allows for the best head/shell energy transfer. I. Background Tom drums are typically composed of a wooden drum shell, a head that ...

We present a live drum separation system for a specific target drumset to be used as a front end in a complete live drum understanding system. Our system decomposes drum note onsets onto spectral drum templates by adapting techniques from non-negative matrix factorization. Multiple templates per drum are computed using a new Gamma mixture model clustering procedure to account for the variety of...

The article substantiates the need for this study, analyzes advantages and disadvantages of various working bodies loading devices, as well results analysis on prospects a finger-type separating body uniform pile seeds into dryers. factors influencing process leveling material methodology experimental research are given. maximum number under study has been determined, most likely areas their ch...

In order to solve the problem of low mechanization level hairy vetch harvesting, a feeding device for an anti-winding harvester was designed. Firstly, physical properties stalk were studied. According mechanical stalk, key components designed and analyzed, structure working principle described. Secondly, discrete element method used simulate analyze movement performance device. On this basis, t...

In this work, a model predictive control method combined with fuzzy identification, is applied to the design of the thermoelectric (TE) power control in the SP-100 space reactor. The future TE power is predicted by using the fuzzy model identified by a subtractive clustering method of a fast and robust algorithm. The objectives of the proposed fuzzy model predictive controller are to minimize b...

High temperature metallurgical slag (temperature, >1450?C) and high moisture sludge (moisture content, >80 wt.%) are common wastes with huge outputs. Many problems, such as cost, low level of harmlessness, efficiency, encountered in current treatment methods. If these can be recycled, they valuable secondary resources. Therefore, using the drum apparatuses to treat two kinds is proposed. ...

A nanogenerator (NG) is a device that converts vibration energy into electricity. Here, a flexible, small size and lightweight NG is successfully demonstrated as an active sensor for detecting the vibration spectrum of a drum membrane without the use of an external power source. The output current/voltage signal of the NG is a direct measure of the strain of the local vibrating drum membrane th...