نتایج جستجو برای: condenser liquefier
تعداد نتایج: 2123 فیلتر نتایج به سال:
This paper presents the analysis, design, fabrication, and testing of a condenser microphone utilizing a thin low-stress polycrystalline silicon diaphragm suspended above a p+ perforated back plate. The microphone is fabricated using a combination of surface and bulk micromachining techniques in a single wafer process without the need of wafer bonding. The device shows sensitivities of -34 dB (...
Botnets represent a global problem and are responsible for causing large financial and operational damage to their victims. They are implemented with evasion in mind, and aim at hiding their architecture and authors, making them difficult to detect in general. These kinds of networks are mainly used for identity theft, virtual extortion, spam campaigns and malware dissemination. Botnets have a ...
Even though there are lots of work studying acoustic resonance in tube bundles, the sound transmission rules barely got researchers attention. And most papers published assume that there is no interaction between the acoustic and structure modes. This paper tries to realize how sound source affects the acoustic transmission and whether the acoustic resonance could couple with the structure. A s...
A. 1 ohansson and P. Lundqvist Dept. of Energy Technology Div. of Applied Thennodynamics and Refrigeration The Royal Institute of Technology, KTH Stockholm, Sweden Test results from field retrofit situations, where R22 has been changed to Isceon 59 1 and R407C in two identical chillers, shows that both substitutes require more subcooling than R22 to give the system a satisfying performance. It ...
This study reports on a modeling strategy for large Air-Cooled Condensers (ACCs). A 64-fan ACC was modeled under various crosswind conditions that investigated the ACC’s specific axial flow fan configuration. The model developed in two parts, an and heat exchanger model. fans were using Actuator Disk Model (ADM). exchangers’ pressure drop Darcy-Forchheimer porosity model, Effectiveness Number o...
The filament drive is a key part of the extrusion assembly Fused Filament Fabrication printer. This investigation examines maximum feed force and slip different driving rollers using made polylactic-acid (PLA) on test stand. stand systematically varies main process parameters: velocity, pinch between rollers, force. has characteristic dependency combined with feed-velocity-dependency, which inf...
Most full-field microscopes at synchrotrons exhibit a highly peaked illumination in the center of the field of view for stationary condenser and objective optics. This illumination pattern is typically reference-corrected by division with an image without the sample to correct for the uneven illumination. However, this correction does not rectify problems such as the poor signal-to-noise ratio ...
We present a laser plasma based x-ray microscope for the water window employing a high-average power laser system for plasma generation. At 90 W laser power a brightness of 7.4 x 10(11) photons/(s x sr x μm(2)) was measured for the nitrogen Lyα line emission at 2.478 nm. Using a multilayer condenser mirror with 0.3 % reflectivity 10(6) photons/(μm(2) x s) were obtained in the object plane. Micr...
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