CHARACTERISTICS OF DETECTION LINEAR POLARIZED RADARS SIGNALS

The article considers the characteristics of detection of linear polarized radars performance of angle orientation plane polarization radiowave

О ФАЗОВЫХ ХАРАКТЕРИСТИКАХ ВАРАКТОРНЫХ УМНОЖИТЕЛЕЙ ЧАСТОТЫ

Described connection betwttn phase and amplitude characteristics of varactors multipliers frequency with change mode operation of devices.Получена связь между фазовыми и амплитудными характеристиками варакторных умножителей при изменении режима работы устройства

Радиолокационные характеристики при флуктуациях угла ориентации плоскополяризованной электромагнитной волны

The article considers the characteristics of detection of linear polarized radars performance of angle orientation plane polarization radiowave.Находятся характеристики обнаружения линейно поляризованного радиолокационного сигнала в случае флуктуационного поведения угла ориентации плоскости поляризации электромагнитной волны

Плотность распределения вероятностей значений угла ориентации плоскости поляризации радиоволны в следящем контуре радиолокационной системы

Density distribution probabilities angle orientation of polarization plate in tracking radar are considered.Получена плотность распределения вероятностей значений угла ориентации плоскости поляризации радиоволны в следящем контуре радиолокационной системы (РЛС)

Характеристики обнаружения поляризованных радиолокационных сигналов

The characteristics of detection of linear polarized radar’s performance of angle orientation of plane polarization radio wave are considered.Получены характеристики обнаружения поляризованных радиолокационных сигналов при условии, что флуктуирует угол ориентации плоcкости поляризации радиоволны, а флуктуации описываются нормальным законом

Clinical added value of MRI to CT in patients scheduled for local therapy of colorectal liver metastases (CAMINO):study protocol for an international multicentre prospective diagnostic accuracy study

Abstract Background Abdominal computed tomography (CT) is the standard imaging method for patients with suspected colorectal liver metastases (CRLM) in the diagnostic workup for surgery or thermal ablation. Diffusion-weighted and gadoxetic-acid-enhanced magnetic resonance imaging (MRI) of the liver is increasingly used to improve the detection rate and characterization of liver lesions. MRI is superior in detection and characterization of CRLM as compared to CT. However, it is unknown how MRI actually impacts patient management. The primary aim of the CAMINO study is to evaluate whether MRI has sufficient clinical added value to be routinely added to CT in the staging of CRLM. The secondary objective is to identify subgroups who benefit the most from additional MRI. Methods In this international multicentre prospective incremental diagnostic accuracy study, 298 patients with primary or recurrent CRLM scheduled for curative liver resection or thermal ablation based on CT staging will be enrolled from 17 centres across the Netherlands, Belgium, Norway, and Italy. All study participants will undergo CT and diffusion-weighted and gadoxetic-acid enhanced MRI prior to local therapy. The local multidisciplinary team will provide two local therapy plans: first, based on CT-staging and second, based on both CT and MRI. The primary outcome measure is the proportion of clinically significant CRLM (CS-CRLM) detected by MRI not visible on CT. CS-CRLM are defined as liver lesions leading to a change in local therapeutical management. If MRI detects new CRLM in segments which would have been resected in the original operative plan, these are not considered CS-CRLM. It is hypothesized that MRI will lead to the detection of CS-CRLM in ≥10% of patients which is considered the minimal clinically important difference. Furthermore, a prediction model will be developed using multivariable logistic regression modelling to evaluate the predictive value of patient, tumor and procedural variables on finding CS-CRLM on MRI. Discussion The CAMINO study will clarify the clinical added value of MRI to CT in patients with CRLM scheduled for local therapy. This study will provide the evidence required for the implementation of additional MRI in the routine work-up of patients with primary and recurrent CRLM for local therapy. Trial registration The CAMINO study was registered in the Netherlands National Trial Register under number NL8039 on September 20th 2019

PHESE CHARACTERISTICS VARACTORS MULTIPLIERS OF FREQUENCY

Described connection betwttn phase and amplitude characteristics of varactors multipliers frequency with change mode operation of devices

OPTIMAL FILTRARION SIGNALS RADIOAETIMETER OF SMALL ALTITUDE WITH REGARDS POLEARIRATION

The article considers the possibility of improving polyrization properties of receivers for continuously frequency-modulated signals in radioaltimeter of small altitude with regards its polariazation are considered. For that Methods of Markov non-linearity filtrations are used

DENSITY DISTRIBUTION PROBABILITIES ANGLE ORIENTATION OF POLARIZATION PLATE IN TRACKING

Density distribution probabilities angle orientation of polarization plate in tracking radar are considered