Method of finite approximation application for planar homogeneous problem solution of regular dielectric waveguide

2001 ◽  
Author(s):  
Vladimir A. Burdin
Keyword(s):  
Dielectric Waveguide ◽  
Homogeneous Problem ◽  
Problem Solution ◽  
Finite Approximation

scholarly journals Radiating structure based on inverted dielectric waveguide with additional elements

2018 ◽  
Keyword(s):  
Dielectric Waveguide ◽  
Electromagnetic Compatibility ◽  
Short Circuit ◽  
Near Field ◽  
Travelling Wave ◽  
Wave Mode ◽  
Field Structure ◽  
Problem Solution ◽  
Dielectric Structure ◽  
Dielectric Plate

Background. Creation of effective radiating structures operating in millimeter range is one of the important directions in modern microwave technology. The use of different hybrid metal-dielectric structures for this range becomes increasingly significant because of possible occurrence of certain physical effects, which are impossible in standard dielectric waveguides and structures on their basis.Objectives. Experimentally investigate the main electrodynamic characteristics of a hybrid metal-dielectric structure, including the ways of excitation and matching with external circuits, energy characteristics.Materials and methods. Hybrid metal-dielectric structure is based on inverted dielectric waveguide, which contains metallized base, dielectric rod made of polystyrene and additional dielectric plate made of glass ceramics. Auxiliary radiating elements in the form of rods of finite length with metallized face are located at certain period on the additional dielectric plate. The near-field structure measurements are carried out through the moving probe method. The isoline method has been used for field structure visualization.Results. The construction of a hybrid radiating structure based on inverted dielectric waveguide with periodically located additional rectangular dielectric rods. The radiation patterns have been measured in H-plane in two modes: short-circuit mode and travelling wave mode. Based on near-field structure measurements, the behavior of the electromagnetic wave propagating in the waveguiding rod and the degree of excitation of the metallized parts of additional structure elements are obtained. The degree of excitation of a surface wave and the possibility of its radiation are obtained. Based on this data, shielding elements insertion possibility and electromagnetic compatibility problem solution can be estimated. Conclusions: The research has revealed possible effective radiation in travelling wave mode with acceptable direct loss, provided by proposed hybrid metal-dielectric structure. Moreover, the structure can provide an acceptable level of matching with external circuits. The possibility of radiated fields with specified characteristics formation in the short circuit and traveling wave modes is demonstrated.

scholarly journals Stress-deformed state in the plane domain boundary angle cutout zone

2018 ◽  
Vol 196 ◽  
pp. 01036 ◽  
Author(s):  
Ludmila Frishter
Keyword(s):  
Elasticity Theory ◽  
Asymptotic Expression ◽  
Domain Boundary ◽  
Homogeneous Problem ◽  
Opening Angle ◽  
Problem Solution ◽  
Limit Values ◽  
Irregular Boundary ◽  
Stress Limit ◽  
Deformed State

Studying the stress-deformed state of structures with complex-shaped boundary is an urgent task for designing and developing numerical and analytical methods of constructions, buildings and structures research. Stress concentration due to geometrically nonlinear shape of the boundaries – cutouts, notches, causes stress, deformation zones with significant magnitudes and gradients. Theoretical analysis of the boundary angle cutout domain stress-deformed state (SDS) under rupturing forced deformations comes down to studying singular solutions of elasticity theory homogeneous problem with power-type specifics. Novelty of the studies given herein is that the SDS in the vicinity of an irregular boundary point – the domain boundary angle cutout vertex, is characterized by stress limit values similar to stress intensity coefficients when applying force criteria in fracture mechanics. Asymptotics of elastic problem solution in the random opening boundary angle cutout domain is written using the stress limit values. Obtained asymptotic expression for elasticity theory plane problem solution allows to analyze the SDS of the domain boundary angle cutout zone as a function of the domain cutout opening angle, mechanical characteristics and eigenvalues of elasticity boundary-value problem in case of stresses homogeneous boundary conditions.

In Search of Somatic Precursors of Spontaneous Insight

2018 ◽  
Vol 32 (3) ◽  
pp. 97-105 ◽  
Author(s):  
Wangbing Shen ◽  
Yuan Yuan ◽  
Chaoying Tang ◽  
Chunhua Shi ◽  
Chang Liu ◽  
...  
Keyword(s):  
Problem Solving ◽  
Direct Evidence ◽  
Electrodermal Activity ◽  
Cardiovascular Responses ◽  
Solution Time ◽  
Problem Solution ◽  
Insight Problem ◽  
Creative Insight ◽  
Insight Problem Solving ◽  
Analytic Problem

Abstract. A considerable number of behavioral and neuroscientific studies on insight problem solving have revealed behavioral and neural correlates of the dynamic insight process; however, somatic correlates, particularly somatic precursors of creative insight, remain undetermined. To characterize the somatic precursor of spontaneous insight, 22 healthy volunteers were recruited to solve the compound remote associate (CRA) task in which a problem can be solved by either an insight or an analytic strategy. The participants’ peripheral nervous activities, particularly electrodermal and cardiovascular responses, were continuously monitored and separately measured. The results revealed a greater skin conductance magnitude for insight trials than for non-insight trials in the 4-s time span prior to problem solutions and two marginally significant correlations between pre-solution heart rate variability (HRV) and the solution time of insight trials. Our findings provide the first direct evidence that spontaneous insight in problem solving is a somatically peculiar process that is distinct from the stepwise process of analytic problem solving and can be represented by a special somatic precursor, which is a stronger pre-solution electrodermal activity and a correlation between problem solution time and certain HRV indicators such as the root mean square successive difference (RMSSD).

"Multiple Transfer Paradigms following Discrimination Problem Solution in Monkeys": Erratum.

1969 ◽  
Vol 67 (2, Pt.1) ◽  
pp. 144-144
Author(s):  
Michael Sledjeski ◽  
Gilbert M. French
Keyword(s):  
Discrimination Problem ◽  
Problem Solution

Hydrostatic Fiber Optic Liquid Level Sensor with position sensitive detector

Metrologiya ◽  
2020 ◽  
pp. 38-51
Author(s):  
V. N. Astapov ◽  
I. N. Kozlova
Keyword(s):  
Fiber Optic ◽  
Effective Area ◽  
Raw Material ◽  
Position Sensitive Detector ◽  
Fiber Optic Sensor ◽  
Liquid Level ◽  
Problem Solution ◽  
Sensitive Detector ◽  
Position Sensitive ◽  
Triangulation Sensor

This article presents the rationale and methodology for developing an intrinsically safe device, namely, a hydrostatic fiber optic sensor with a position-sensitive detector for monitoring the level of oil products in large-capacity tanks at oil depots and during pumping in a raw material warehouses. This device suitable for continuous monitoring of the liquid level, based on the measurement of a hydrostatic column of liquid with automatic offset of changes in the density of the liquid. Offset is carried out by means of a displacer (a fully submerged float), inside which a housing with a position-sensitive detector (PSD) is integrated. Theoretical validation of the bellows suspension usage for a displacer is given. During filling a container with a liquid whose level is measured, liquid bellows, the movement of which is recorded by an optical triangulation sensor using the reflected infrared ray incident on the bottom of the bellows. The principle of the triangulation sensor operation is based on the geometric properties of the triangles. The pulses of infrared radiation come through a fiber optic cable. In order to measure the movement of the surface (the bottom of the bellows) by measuring the movement of the reflected beam, a position-sensitive detector is used, which is located in a remote controller. In this device for the intrinsic safety problem solution, optical inputs of a fiber optic flat cable are located in the active zone of the sensor, which is connected to the optical inputs of a position-sensitive detector, operated on the principles of photoelectric effect. The light spot moving along the sensitive zone and converted by the detector into a one-dimensional signal proportional to the distance to the object. hydrostatically applies pressure over the entire effective area of the measuring

DISAMBIGUATION OF INVERSE PROBLEM SOLUTION FOR RETRIEVAL OF RAIN INTENSITY USING DOUBLE FREQUENCY RADAR SENSING

2015 ◽  
Vol 74 (17) ◽  
pp. 1535-1543
Author(s):  
G. I. Khlopov ◽  
G. B. Veselovska ◽  
O. A. Voitovych
Keyword(s):  
Inverse Problem ◽  
Problem Solution ◽  
Rain Intensity ◽  
Double Frequency ◽  
Inverse Problem Solution ◽  
Radar Sensing

THE MODEL OF PULSE RADIATOR WITH OUTPUT SIGNAL COMPRESSION IN HELICALLY COILED DIELECTRIC WAVEGUIDE

2019 ◽  
Vol 78 (17) ◽  
pp. 1509-1520
Author(s):  
V. L. Pazynin ◽  
M. V. Maiboroda ◽  
A. A. Shmat'ko
Keyword(s):  
Output Signal ◽  
Dielectric Waveguide ◽  
Signal Compression
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