Optimal base point selection method based on convex hull construction technology

The primary purpose of maritime delimitation is to ensure the maximum internal waters area obtained. In order to grantee the maximum internal waters area obtained with the selected base point, the idea and method of optimal selection of the territorial sea base points with the convex hull (minimum convex hull) construction technology is proposed. The ideal base points are selected by constructing convex hull for all alternative base points, which makes it possible to realize the automatic selection of base points under the principle of the maximum internal waters area.

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Base Point Split Algorithm for Generating Polygon Skeleton Lines on the Example of Lakes

ISPRS International Journal of Geo-Information ◽

10.3390/ijgi9110680 ◽

2020 ◽

Vol 9 (11) ◽

pp. 680

Author(s):

Elżbieta Lewandowicz ◽

Paweł Flisek

Keyword(s):

Base Point ◽

Vector Data ◽

Triangulated Irregular Network ◽

Base Points ◽

Complex Polygon ◽

Selection Of

This article presents the Base Point Split (BPSplit) algorithm to generate a complex polygon skeleton based on sets of vector data describing lakes and rivers. A key feature of the BPSplit algorithm is that it is dependent on base points representing the source or mouth of a river or a stream. The input values of base points determine the shape of the resulting skeleton of complex polygons. Various skeletons can be generated with the use of different base points. Base points are applied to divide complex polygon boundaries into segments. Segmentation supports the selection of triangulated irregular network (TIN) edges inside complex polygons. The midpoints of the selected TIN edges constitute a basis for generating a skeleton. The algorithm handles complex polygons with numerous holes, and it accounts for all holes. This article proposes a method for modifying a complex skeleton with numerous holes. In the discussed approach, skeleton edges that do not meet the preset criteria (e.g., that the skeleton is to be located between holes in the center of the polygon) are automatically removed. An algorithm for smoothing zigzag lines was proposed.

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Vision-based navigation system feature point selection method based on convex hull for non-cooperative target

Infrared and Laser Engineering ◽

10.3788/irla201948.0317004 ◽

2019 ◽

Vol 48 (3) ◽

pp. 317004

Author(s):

宁明峰 Ning Mingfeng ◽

张世杰 Zhang Shijie ◽

王诗强 Wang Shiqiang

Keyword(s):

Convex Hull ◽

Navigation System ◽

Selection Method ◽

Feature Point ◽

Point Selection ◽

Vision Based Navigation ◽

System Feature

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A Material Selection Method Based on Double Base Points

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.707.509 ◽

2014 ◽

Vol 707 ◽

pp. 509-513

Author(s):

Shi Gang Chao

Keyword(s):

Material Selection ◽

Selection Method ◽

Distance Measures ◽

Entropy Weight ◽

Base Points ◽

Decision Making Problem ◽

New Material ◽

Double Base ◽

Multiple Attributes Decision Making ◽

Selection Of

The selection of the most desirable material contains many evaluation attributes, and thus leads to hard be solved. The material selection is actually a multiple attributes decision making problem, which has been studied by many authors. The aim of this study is to propose a new material selection method, which is an improved double base points method through defining the entropy weight and used the relative approach degree to measure the distance measures. The method may avoid the influence of subjective factors through the entropy weight, is very suitable for material selection problem. The applied example proves that the method is both effective and exercisable.

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Optimal Selection Method of Test Points on Circuit Board Level

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1006-1007.1125 ◽

2014 ◽

Vol 1006-1007 ◽

pp. 1125-1128

Author(s):

Xiu Sheng Duan ◽

Sheng Jun Li ◽

Jing Xiao ◽

Jie Wang

Keyword(s):

Fault Diagnosis ◽

Feature Selection Method ◽

Selection Method ◽

Test Point ◽

Circuit Board ◽

Optimal Selection ◽

Point Selection ◽

Test Point Selection ◽

Test Points ◽

Board Level

Test point selection is the basic problem of fault diagnosis systems. It is also one of the key links in designing the condition monitoring system. Aiming at the optimizing the test points on circuit board level, an optimal selection method is proposed. It is the method which combines the SVM algorithm and the feature selection method. The principle and process of the method are discussed in detail and in the fault diagnosis experiment of a circuit board, the effectiveness is verified finally.

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Base Point Split Algorithm for Generating Polygon Skeleton Lines

10.20944/preprints202009.0721.v1 ◽

2020 ◽

Author(s):

Elżbieta Lewandowicz ◽

Paweł Flisek

Keyword(s):

Simple Algorithm ◽

Base Point ◽

Vector Data ◽

Base Points ◽

Selection Of

The article presents the Base Point Split (BPSplit) algorithm for generating a polygon skeleton based on sets of vector data describing lakes and rivers. A key feature of the BPSplit algorithm is that it is dependent on base points representing the source or mouth of a river or a stream. The input values of base points determine the shape of the resulting skeleton. Various skeletons can be generated with the use of different base points. Base points are applied to divide polygon boundaries into segments. Segmentation supports the selection of TIN edges inside polygons. The midpoints of selected TIN edges constitute a basis for generating a skeleton. The algorithm handles polygons with numerous holes, and it accounts for all holes. This article proposes a method for modifying a complex skeleton with numerous holes. In the discussed approach, skeleton edges that do not meet the preset criteria (e.g. that the skeleton is to be located between holes in the center of the polygon), are automatically removed. A simple algorithm for smoothing zigzag lines was proposed.

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The DQE of an electron image recording system

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100107642 ◽

1978 ◽

Vol 36 (1) ◽

pp. 100-101

Author(s):

K.-H. Herrmann ◽

D. Krahl ◽

H.-P Rust

Keyword(s):

Primary Electron ◽

Ideal Case ◽

Image Recording ◽

Main Requirement ◽

High Detection ◽

Electron Image ◽

Video Amplifier ◽

Detection Quantum Efficiency ◽

Selection Of ◽

The Ideal

The high detection quantum efficiency (DQE) is the main requirement for an imagerecording system used in electron microscopy of radiation-sensitive specimens. An electronic TV system of the type shown in Fig. 1 fulfills these conditions and can be used for either analog or digital image storage and processing [1], Several sources of noise may reduce the DQE, and therefore a careful selection of various elements is imperative.The noise of target and of video amplifier can be neglected when the converter stages produce sufficient target electrons per incident primary electron. The required gain depends on the type of the tube and also on the type of the signal processing chosen. For EBS tubes, for example, it exceeds 10. The ideal case, in which all impinging electrons create uniform charge peaks at the target, is not obtainable for several reasons, and these will be discussed as they relate to a system with a scintillator, fiber-optic and photo-cathode combination as the first stage.

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