scholarly journals PECULIARITIES OF SETTING THE VALUE OF THE METRIC APPLICABLE TO IDENTIFY THE SIMILARITY OF VESSEL ROUTES IN THE LIGHTING SYSTEM

2021 ◽  
pp. 21-41
Author(s):  
O.V. Borovyk ◽  
D.О. Borovyk
Keyword(s):  
Linear Approximation ◽  
Spline Interpolation ◽  
Interpolation Polynomial ◽  
Problem Analysis ◽  
Lighting System ◽  
Telecommunication System ◽  
Ship Route ◽  
Comparison Of The Results ◽  
Discrete Moments ◽  
Degree Of Similarity

The information component of the modern model of border protection in the maritime area is implemented using the integrated information and telecommunication system of the Marine Guard "Gart-12". The use of this system allows to obtain information about the current position of ships, port of departure and port of destination, type of cargo and other additional data. When choosing a vessel in the surface lighting system, it is possible to view the previous points of its route, obtained at certain discrete moments of time. The latter is necessary to establish possible signs of violation of the rules of the border regime by violators of border legislation. In this case, the visualization of the route is carried out using a linear approximation, and a possible violation of the rules of the border regime is established by comparing the route of an individual vessel and a cluster of routes connecting the departure and destination of the vessel. However, the use of linear approximation in the formation of a continuous approximation route of the vessel is questionable and unconfirmed. The influence of the type of approximation in the construction of a continuous route of the vessel through a set of discrete points of the vessel's location at fixed moments of time on the value of the metric used to establish the similarity of the route of two different vessels is investigated. The study involved: the formalization of the studied problem; analysis of the possibility of using linear, piecewise-square approximation, approximation using Lagrange interpolation polynomial and Newton's interpolation polynomial, as well as spline interpolation for its solution; calculation of metrics to establish the degree of similarity of ship routes; testing the hypothesis about the feasibility of applying a linear approximation based on a comparison of the results using different approximation methods. Software-algorithmic implementation of the solution of the researched problem, carried out by the authors, allows to automate the process of hypothesis testing and is the basis for further study of the influence of the type of approximation on the shape of the ship route cluster.

scholarly journals Response of Non-Linear Shock Absorbers-Boundary Value Problem Analysis

2013 ◽  
Vol 18 (3) ◽  
pp. 793-814
Author(s):  
M.A. Rahman ◽  
U. Ahmed ◽  
M.S. Uddin
Keyword(s):  
Boundary Value Problem ◽  
Degrees Of Freedom ◽  
Nonlinear Boundary ◽  
Boundary Value ◽  
Problem Analysis ◽  
Nonlinear Springs ◽  
Shock Absorbers ◽  
Response Versus ◽  
Comparison Of The Results ◽  
Frequency Ratios

Abstract A nonlinear boundary value problem of two degrees-of-freedom (DOF) untuned vibration damper systems using nonlinear springs and dampers has been numerically studied. As far as untuned damper is concerned, sixteen different combinations of linear and nonlinear springs and dampers have been comprehensively analyzed taking into account transient terms. For different cases, a comparative study is made for response versus time for different spring and damper types at three important frequency ratios: one at r = 1, one at r > 1 and one at r <1. The response of the system is changed because of the spring and damper nonlinearities; the change is different for different cases. Accordingly, an initially stable absorber may become unstable with time and vice versa. The analysis also shows that higher nonlinearity terms make the system more unstable. Numerical simulation includes transient vibrations. Although problems are much more complicated compared to those for a tuned absorber, a comparison of the results generated by the present numerical scheme with the exact one shows quite a reasonable agreement

scholarly journals A Varied Density-based Clustering Approach for Event Detection from Heterogeneous Twitter Data

2019 ◽  
Vol 8 (2) ◽  
pp. 82 ◽  
Author(s):  
Zeinab Ghaemi ◽  
Mahdi Farnaghi
Keyword(s):  
Spatial Heterogeneity ◽  
Event Detection ◽  
Spatial Clustering ◽  
Spline Interpolation ◽  
The United States ◽  
Spatial Proximity ◽  
Twitter Data ◽  
Density Based Clustering ◽  
Exponential Spline ◽  
Comparison Of The Results

Extracting the latent knowledge from Twitter by applying spatial clustering on geotagged tweets provides the ability to discover events and their locations. DBSCAN (density-based spatial clustering of applications with noise), which has been widely used to retrieve events from geotagged tweets, cannot efficiently detect clusters when there is significant spatial heterogeneity in the dataset, as it is the case for Twitter data where the distribution of users, as well as the intensity of publishing tweets, varies over the study areas. This study proposes VDCT (Varied Density-based spatial Clustering for Twitter data) algorithm that extracts clusters from geotagged tweets by considering spatial heterogeneity. The algorithm employs exponential spline interpolation to determine different search radiuses for cluster detection. Moreover, in addition to spatial proximity, textual similarities among tweets are also taken into account by the algorithm. In order to examine the efficiency of the algorithm, geotagged tweets collected during a hurricane in the United States were used for event detection. The output clusters of VDCT have been compared to those of DBSCAN. Visual and quantitative comparison of the results proved the feasibility of the proposed method.

251 Low-cost and low-tech archiving/telecommunication system to exchange echocardiographic cineloops

1999 ◽  
Vol 1 ◽  
pp. S17-S17
Author(s):  
A FERNANDES ◽  
E DIAS ◽  
M FIUZA ◽  
I DIONISIO ◽  
F VEIGA ◽  
...  
Keyword(s):  
Low Cost ◽  
Telecommunication System

A Rapid Radioisotope Dilution Technique for the Accurate Determination of the Cardiac Output

1968 ◽  
Vol 07 (01) ◽  
pp. 1-7
Author(s):  
Muhammad Razzak ◽  
Robert Botti ◽  
William MacIntyre
Keyword(s):  
Cardiac Output ◽  
Isotope Dilution ◽  
Accurate Determination ◽  
Differential Count ◽  
Stroke Index ◽  
Recording Device ◽  
Dilution Curve ◽  
Index Stroke Volume ◽  
Index Stroke ◽  
Comparison Of The Results

SummaryA pair of printing scalers was used to record the information obtained by external monitoring of the isotope dilution curve following the intravenous injection of radioiodinated human serum albumin. The first scaler gives the differential count rate of the curve at increments of one second, whereas the second integrates continuously the isotope dilution curve. This recording device enabled cardiac output determinations to be calculated rapidly at the bedside without any loss in accuracy.Using this method in 15 normal individuals, the cardiac output was found to be 6.13 ± 0.73 liters/minute (Mean ± 1 S.D.), with a cardiac index of 3.36 ± 0.35 liters/minute/m2. In the same group of normals, the stroke index (stroke volume/surface area) amounted to 50 ± 7.3 ml/beat/m2.Comparison of the results of this method with those obtained by integration of the entire isotope dilution curve by an IBM 1620 computer showed excellent agreement, proving the validity of the suggested technique.

Design, Development and Practical Realization of a VLC Supportive Indoor Lighting System

2020 ◽  
pp. 87-97
Author(s):  
Sourish Chatterjee ◽  
Biswanath Roy
Keyword(s):  
Data Communication ◽  
Cost Effective ◽  
Ambient Light ◽  
Lighting System ◽  
Design Development ◽  
Led Driver ◽  
Communication Performance ◽  
Good Communication ◽  
Simulink Model ◽  
Light Interference

In an office space, an LED-based lighting system allows you to perform the function of a data transmitter. This article discusses the cost-effective design and development of a data-enabled LED driver that can transmit data along with its receiving part. In addition, this paper clearly outlines the application of the proposed VLC system in an office environment where ambient light interference is a severe issue of concern. The result shows satisfactory lighting characteristics in general for this area in terms of average horizontal illuminance and illuminance uniformity. At the same time, to evaluate real-time and static communication performance, Arduino interfaced MATLAB Simulink model is developed, which shows good communication performance in terms of BER (10–7) even in presence of ambient light noise with 6 dB signal to interference plus noise ratio. Our designed system is also flexible to work as a standalone lighting system, whenever data communication is not required.

Light Dramaturgy as an Element of an Integrated Approach to the Creation of Museum Expositions and Exhibition Projects

2019 ◽  
pp. 108-114
Author(s):  
Nicolay R. Vorobyov
Keyword(s):  
Final Stage ◽  
Historical Development ◽  
Integrated Approach ◽  
Lighting Design ◽  
Lighting System ◽  
Scientific Concepts ◽  
Hands On ◽  
Artistic Styles ◽  
The Creation

Architectural and artistic construction of museum is one of the most complex genres in environment development and design, with its inherent qualities, means of expressiveness, principles of environment and image development, scientific concepts, in the context of historical development, artistic styles and trends. The author of the article considers the artistic lighting design in isolation from the integral dramaturgy of the project to be deeply flawed, and the setting of accent lighting at the final stage Ц to be simple, but not outstanding. Based on extensive hands-on experience in the construction of museum expositions, the author of the article reveals some peculiarities, especially significant to the participants of the lighting system setting for museums and other cultural facilities.

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