نتایج جستجو برای: fbg
تعداد نتایج: 2228 فیلتر نتایج به سال:
Usually blood glucose levels measured in the fasted status (fasting glucose) are lower than fed (postprandial glucose). However, postprandial (PBG) fasting (FBG) can be found some cases. This study aims to describe prevalence, clinical characteristics, and contributing risk factors for PBG ≤F BG. It’s a nationwide cohort [the National Key R&D Program of China (2016YFC1305700)] conducted China, ...
objective : this study was designed to evaluate the effects of risperidone on fasting blood glucose (fbg) in patients with schizophrenia . method: seventy five non-diabetic patients with schizophrenia (based on diagnostic and statistical manual of mental disorders, fourth edition criteria) entered this cross-sectional study. patients did not receive any medications (including risperidone) affec...
In this study, a new numerical method is introduced to obtain the exact shape of output pulse in the chalcogenide fiber Bragg grating (FBG). A Gaussian pulse shape with 173 ps width is used as an input pulse for lunching to a 6.6 mm nonlinear FBG. Because of bistable and hysteresis nature of nonlinear FBG the time sequence of each portion of pulse is affected the shape of output pulse. So we di...
<p>This study has outlined the fiber bragg grating (FBG) temperature sensors signal processing for data communications by using OptiGrating simulation software. The reflectivity of silica and sapphire spectrum is reported against wavelength internal external variations. As well as apodized Gaussian simulated clarified high sensitivity FBG nearly 0.11 pm/<sup>0</sup>C, where it...
Abstract Fiber Bragg grating (FBG) array is a powerful technique for quasi-distributed sensing along the entire length of fiber with fast response and high precision. It has been widely used temperature, strain, vibration monitoring. In this review work, an overview on recent advances FBG arrays conducted. Firstly, fabrication methods are reviewed, which include femtosecond laser system online ...
Fiber Bragg grating (FBG) sensors have limitations in measuring high and extreme temperatures because general FBG are made of silica fiber, which at can interfere with the mechanical performance materials. In this paper, we propose an S-FBG (Sapphire Grating) sensor is resistant to environmental influences temperatures. By developing measure temperatures, it found that has sensitivity, every 10...
In this study, the performance of a current sensor based on giant magnetostrictive materials (GMM) and fiber Bragg grating (FBG) has been improved by optimizing spectral characteristics gratings. By analyzing influence FBG characteristics, three key parameters (gate region length, refractive index modulation depth, toe cutting system) are selected for optimization. The optimal determined to imp...
Based on the study of sensing property fiber bragg grating (FBG) sensor network, this paper takes hybrid wavelength division/time division multiplexing network with high-capacity FBG as research object to noise source, category and traditional reduction algorithm. In accordance characteristic crosstalk accumulation in proposes LCEEMD-LWT signal processing method, which uses local complementary ...
Compared with coupled-mode theory (CMT), which is widely used for studies involving optical fiber Bragg gratings (FBGs), the proposed investigation scheme is visualized, diagrammatic, and simple. This method combines the finite element method (FEM) and eigenmode expansion method (EEM). The function of the FEM is to calculate all guided modes that match the boundary conditions of optical fiber w...
Purpose: To investigate the hypoglycaemic activity of various extracts of the aerial part of Acalypha fruticosa in normal rabbits. Methods: The rabbits were randomly assigned to 8 groups (n = 3) and treated with a single oral dose. Group 1 served as normal control and received 2 % dimethyl sulfoxide (DMSO, 3 ml/kg); group 2 served as standard treatment and received metformin (300 mg/kg); groups...
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