Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userتصميم وبناء جهاز رديف في التشخيص الطبي يعتمد على قياس نسبة غاز NH3 في هواء الزفير
1358
0 13
0.0
(
0
)
Created by
يوسف يوسف
Ask ChatGPT about the research
جرى في هذا العمل تحسين منظومة تحليل طيفي تعتمد على الديودات الليزرية القابلة للتوليف (TDLAS)، حيث تم ربطها بالحاسوب ثمّ تحصيل البيانات ومعالجتها آلياً باستخدام البرمجة في MatLab، وكذلك تحسين أداء حجرة القياس من النوع Multipass White Cell، حيث طُلي السّطح الداخلي للحجرة بشمع البارافين ممّا قلل من امتزاز غاز النشادر. تم توظيف هذه المنظومة في دراسة تركيز غاز النشادر [NH3] في هواء الزفير لمجموعة مكونة من 20 شخصاً من المتطوعين الأصحاء في حالتي الصّيام والإفطار، ومجموعة مكونة من 36 شخصاً من المرضى المصابين بالفشل الكلوي المزمن.
In this research work, the performance of the measurement system (TDLAS) has been improved, it was connected to the computer for acquisition and processing data using the programming language MatLab. The internal surface of the cavity was coated by paraffin wax, adsorption is significantly lowered. This system has been employed to measure the concentration of ammonia in exhaled breath for 20 healthy volunteers in two cases (fasting and non-fasting), and 36 volunteers with chronic renal disease (before hemodialysis).
References used
محمد دلّه ,عقيل سلّوم . (2016) . "بناء منظومة تحليل طيفي ليزري لقياس تركيز بعض الغازات الصناعية" . المعهد العالي للعلوم التطبيقية والتكنولوجيا
http://sh.sy/Yk
rate research
Read More
The wireless communication devices became very important. They have been fastly
developed fastly in the last few years, so, it was necessary to propose new types Antenna .
A new printed patched Antenna design as, printed, a lenses and wire Antenna,
are
objected to improve the performance, gain and beam width of Antenna.
This work propos a design and simuling of patch fractal Antenna, using Zeland. This
type which depends on fractal geometry (sierpinski carpet) has a very good radiation
pattern and has wide applications.
The proposed Antenna parameters were studied by the help of Zeland simulator, The
variation of the antenna parameters happens when the fractal parameters (as stage of
growth) changes, were analysed.
Finally, the proposed Antenna was praticly applied and measured at the frequency
10Ghz allowed by the microwave and Antenna laboratory.
In this study we developed an adaptive model inspired by internal models in the cerebellum and this approach called Feedback Error Learning (FEL). FEL is the origin of Learning Feed-Forward Control (LFFC). It depends on Feedback Controller and Feed-F
orward Controller which is a Neural Network, and this Neural Network uses feedback controller output as training signal. We developed this approach to control a robot arm, and to balance inverted pendulum and to control bus suspension system. We developed this approach by adding a second Neural Network, and this new Neural Network uses FEL controller output as training signal. We simulate these systems by using Matlab and Simulink, and we find that this development improves control performance.
Fractal antenna are considered actually as the most important large band antenna, due
to their design parameters that are based on fractal geometry. The long distance between
two specific points of antenna and hisself similarity allow to obtain a m
ultiple resonance
frequencies (Wide Band), which is used for several application. The using of dipole
antenna in form of Van-Koch curve offer multi-resonance antenna, the Nec simulator is
used to design this antenna. The proposed antenna had been fabricated and measured in the
antenna laboratory at two central frequencies 1GHz and 10 GHz. Both theoretical and
experimental results were very closed in spite of imperfect experiment condition. The Van-
Koch antenna fabrication and measurement in laboratory gives the possibility to designing
and applying this antenna type, additionally we can study the change of antenna parameters
( gain, rayon diagram … ) when the fractal parameters varies.
Over the last few years, the radio frequency (RF) technology has experienced an exponential growth. With the requirement for more integration, new RF wireless architectures are needed. One of the most critical blocks in a wireless transceiver is the
oscillator. Phase noise from radio frequency (RF) oscillators is one of the major limiting factors affecting wireless transceiver performance. Phase noise directly affects short-term frequency stability, Bit-Error-Rate (BER), and phase-locked loop adjacent-channel interference.
Research over the past years has focused on electromagnetic waves and meta-materials. These structures are designed to give electromagnetic properties that cannot be produced by traditional, well known natural structures. Meta-materials obtain their
electromagnetic properties from their structures, not from their components. Meta-materials have new properties that define different mechanisms for electromagnetic wave propagation. These materials have been studied theoretically and have been used in many applications, especially microwaves and photonic fields. This research depends on these kinds of material, explains them, and analyzes the electromagnetic properties that yield from putting columns from these slabs with negative permittivity and permeability coefficient (MMs) in a fractal distribution of a natural medium. This research also compares the resulting properties with the electromagnetic properties that yield natural materials distributed the same way. We use the HFSS simulator which depends on the finite element method for calculating transmission and reflection coefficient for these structures.
suggested questions
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
