FEM Engineering (Norway)

Environmentally conditioned climatic test chambers are test devices that can simulate temperature and relative humidity conditions in a wide range as standard and can be produced in various volumes. PID is the most used control method in climatic chambers. Since the parameters in the PID controller are determined for wide ranges, the system performance is insufficient since the parameters at intermediate values and different volumes need to be optimized, long waiting times and high energy consumption to reach the target temperature value may cause the PID controller to not fully meet the requirements under some conditions. This study presents an innovative method for the control of interior space heating system with LSTM (Long-Short Time Memory)-based deep neural network model in accordance with the created test recipe. The model is trained with the dataset created with the outputs of the PID controller. As a result of the method used, an error value of 0.0014 was obtained. The presented results show that the trained model successfully predicts the outputs of the heating system according to the target temperatures.

IntroductionPolysomnography (PSG) is the primary tool for sleep monitoring and the diagnosis of sleep disorders. Recent advances in signal analysis make it possible to reveal more information from this rich data source. Furthermore, many innovative sleep monitoring techniques are being developed that are less obtrusive, easier to use over long time periods and in the home situation. Here, we describe the methods of the Sleep and Obstructive Sleep Apnoea Monitoring with Non-Invasive Applications (SOMNIA) project, yielding a database combining clinical PSG with advanced unobtrusive sleep monitoring modalities in a large cohort of patients with various sleep disorders. The SOMNIA database will facilitate the validation and assessment of the diagnostic value of the new techniques, as well as the development of additional indices and biomarkers derived from new and/or traditional sleep monitoring methods.Methods and analysisWe aim to include at least 2100 subjects (both adults and children) with a variety of sleep disorders who undergo a PSG as part of standard clinical care in a dedicated sleep centre. Full-video PSG will be performed according to the standards of the American Academy of Sleep Medicine. Each recording will be supplemented with one or more new monitoring systems, including wrist-worn photoplethysmography and actigraphy, pressure sensing mattresses, multimicrophone recording of respiratory sounds including snoring, suprasternal pressure monitoring and multielectrode electromyography of the diaphragm.Ethics and disseminationThe study was reviewed by the medical ethical committee of the Maxima Medical Center (Eindhoven, the Netherlands, File no: N16.074). All subjects provide informed consent before participation.The SOMNIA database is built to facilitate future research in sleep medicine. Data from the completed SOMNIA database will be made available for collaboration with researchers outside the institute.

Flashing losses from crude oil and condensate storage are routinely vented to the atmosphere. By minimizing operating pressure of low-pressure separators, the amount of flashing losses can be reduced, resulting in increased profits at a minimal cost of implementation and an immediate payback. Companies can be report these methane reductions to the Environmental Protection Agency's Natural Gas STAR Program. Devon Energy realized savings of approximately $7000 per year after separator optimization at one of its oil and gas production facilities.

Many kinds of rubber parts such as fusing roller, media handling roller, and cleaning blade apply to commercial electrophotographic copiers and printers. Recently, charging roller, developing roller, and toner transfer roller or belt composed of rubber materials have progressed remarkably. The cause of this progress is that electric resistance of rubber materials can be precisely controlled in semi-conductive region such. as 106-1012Ωcm. Charging roller is used for providing charge to a photoconductor. The photoconductor is charged by micro space charging, i.e. directly contacting the DC or DC plus AC voltage applied semi-conductive rubber roller on the photoconductor. In a developing process using a non-magnetic one-component developer, charged toner particles are transferred from the developing rubber roller to the photoconductor by the latent image potential. In a transfer process, toner image created by a developing process is transferred to a recording paper by the transfer electric field generated between the voltage applied transfer roller and the photoconductor or the intermediate transfer drum/belt. This report focuses on applications of semi-conductive rubber for electrophotographic system, and explains the electrical and mechanical properties of semi-conductive rubbers in demand and the conditions for using in electrophotographic processes.