نتایج جستجو برای ' Balance '

 We present structural and thermal model (STM) tests of the BepiColombo laser altimeter (BELA) receiver baffle with emphasis on the correlation of the data with a thermal mathematical model. The test unit is a part of the thermal and optical protection of the BELA instrument being tested under infrared and solar irradiation at the University of Bern. An iterative optimization method known as particle swarm optimization has been adapted to adjust the model parameters, mainly the linear condu...

 The use of ventilation systems in buildings is increasing. In buildings such as libraries and museums, ventilation systems have been used to maintain optimal hygrothermal climatic conditions for important and extremely rare artefacts. Ventilation systems are now increasingly used for normal purposes in residential and commercial buildings. In cool temperate climates such as in Austria, winter exterior air is very dry. Because of dry outdoor air, when using a ventilation system in winter wi...

 A constant temperature and humidity air-conditioning system driven by a ground source heat pump (GSHP) was designed and constructed in an archives building. The imbalance of earth energy caused by the difference of load between heating mode and cooling mode affects soil temperature, which may result in poor efficiency of the GSHP system. Therefore, the system was optimized based upon two aspects. Firstly, the heat recovery technology was used to reheat the air inside the air handling unit ...

 Human fatigue, caused by sleep loss, extended wakefulness, and/or circadian misalignment, is a major cause of workplace errors, incidents and accidents. In some industries, employees are required to undertake fitness for duty testing at the start of a shift to identify instances where their fatigue risk is elevated, so that minimisation and/or mitigation strategies can be implemented. Postural balance has been proposed as a fitness for duty test for fatigue, but it is largely untested. The...

 A numerical treatment of fretting-wear under vibratory loading is proposed. The method is based on the Dynamic Lagrangian Frequency Time method. It models unilateral contact by using Coulomb’s friction law. The basic idea is to separate time into two scales, a slow scale for tribological phenomena and a fast scale for dynamics. For a given number of vibration periods, a steady state is assumed and the variables are decomposed into Fourier series. An Alternating Frequency Time procedu...

 Inverted-v braced frames are typical braced frame configurations which with increase of lateral loads the compressive braces buckle and plastic hinges form in the braces. Shear capacity of frame decrease as a result of compression braces' buckling. To overcome these limitations of chevron braced frames zipper braced frames have been suggested. Zipper columns are vertical members connecting the mid points of the beams above the first floor. In order to investigate the seismic behavior of zi...

 In this paper a Rainfall-Runoff model using Evolutionary Neural Networks (ENN) is developed and applied in a basin in Urmia Lake located in north western Iran. Artificial Neural Networks have been used as black box water balance models for estimating basin outflow in last two decades. Most of these models are developed for areas with rainfall as the predominant form of precipitation. Therefore, for most parts around the world, including Iran, where snowfall is the main type of annual preci...

 This paper presents a comparative analysis of various nonlinear estimation techniques when applied for output feedback model-based control of batch crystallization processes. Several nonlinear observers, namely an extended Luenberger observer, an extended Kalman filter, an unscented Kalman filter, an ensemble Kalman filer and a moving horizon estimator are used for closed-loop control of a semi-industrial fed-batch crystallizer. The performance of the nonlinear observers is evaluated in te...

 Broadbent and Calcott's breakage matrix methodology has been used for more than 50 years to model various comminution processes and to determine breakage functions from experimental data. The methodology assumes first-order law of breakage and neglects mechanical multi-particle interactions that are especially prevalent in dense-phase comminution processes and breakage tests. Although several researchers severely criticized this aspect of the methodology, Baxter et al. (2004, Powder T...