Selection of Pioneer 11 Target Point

1976 ◽  
pp. 157-168
Keyword(s):  
Target Point ◽  
Selection Of

About the Accuracy of Positioning of a Linear Robot Equipped with a High Resolution Optical System

2014 ◽  
Vol 657 ◽  
pp. 844-848 ◽  
Author(s):  
Vasile Nasui ◽  
Mihai Banica
Keyword(s):  
Experimental Data ◽  
Dynamic Programming ◽  
High Resolution ◽  
New Products ◽  
Maximum Velocity ◽  
Measuring System ◽  
Velocity Variation ◽  
Target Point ◽  
Linear Actuators ◽  
Selection Of

Robots have rapidly become key elements to improve general performances of the existent products, to add up new supplementary characteristics or even in view of creating new products that were impossible to create prior to this research. This paper presents a measuring system with optical device in view of determining velocity variation on the investigated axe of the maximum velocity and acceleration or of their variation in dynamic circumstance. The advanced research of precision parameters is a technical necessity, which leads to the selection of linear actuators according to the conditions of usage. Has been made a measurements stand in order to determine these parameters, a stand equipped with laser ruler with a system of numeric acquisition of experimental data. By analyzing the measuring values presented in this paper it can be concluded that when the positioning precision in the target - point of an acting linear robot or when the trajectory precision is absolutely required, the obtained results must be taken into account. We can operate these appropriate corrections in the system of dynamic programming of the robot.

scholarly journals List Point Marker Path Finding for Artificial Intelligence Movement in 3D Games

2021 ◽  
Vol 9 (10) ◽  
pp. 1336-1340
Keyword(s):  
Artificial Intelligence ◽  
Shortest Path ◽  
Target Point ◽  
Path Finding ◽  
Breadth First Search ◽  
C Language ◽  
3D Game ◽  
Shortest Distance ◽  
Marker Point ◽  
Selection Of

In making a path finding algorithm in a 3D game to determine the direction of the NPC agent towards the destination, the Djiksra algorithm, Depth First Search, Breadth First Search and so on, usually the shortest distance is directly proportional to the travel duration to the target point. In this study, a test will be made using a list marker point such as the Djiksra algorithm to get the shortest distance and fastest time to reach the destination, in making this algorithm the C# language is used and the Unity software is used. After experimenting with various list points in different places in two directions, it was found that the distance traveled is always directly proportional to duration. So the selection of the fastest or shortest path can be done with this list point marker algorithm.

scholarly journals Method and Algorithm for Recognition Dynamic Objects from a Mobile Platform, from Images Obtained in Different Spectral Ranges and Lidar Data

2020 ◽  
Vol 24 (3) ◽  
pp. 121-136
Author(s):  
I. E. Cherneckaya ◽  
S. V. Spevakova ◽  
D. V. Primenko
Keyword(s):  
Experimental Studies ◽  
Mobile Platform ◽  
Target Point ◽  
Lidar Data ◽  
Multispectral Images ◽  
Advantages And Disadvantages ◽  
Autonomous Operation ◽  
Dynamic Objects ◽  
Spectral Ranges ◽  
Selection Of

Purpose of research. In modern automatic information collection systems, autonomous mobile devices are increasingly used, data from which can be obtained in conditions hazardous to human health, from geographically remote places, in difficult meteorological conditions and in round-the-clock observation mode. For the autonomous operation of such devices, it is necessary to use methods and algorithms that allow you to build a map of the area, link a mobile platform to it, determine a route to a target point, highlight obstacles along the route and correct the route taking into account detected obstacles. Methods. The article proposes a method and an algorithm for the selection of dynamic objects from a mobile platform, based on the analysis of data obtained from a multispectral camera, which allows the selection of obstacles, such as water, plant origin, technogenic nature, etc. with reduced computational complexity. To improve the accuracy of determining the coordinates of detected objects, a laser rangefinder is used. Results. We consider the well-known methods of multispectral images recognition and present their comparative analysis. A method and an algorithm for recognition dynamic objects from a mobile platform, from images obtained in different spectral ranges and lidar data are proposed. Experimental studies were carried out to confirm the adequacy of the mathematical substantiation of the method, to reduce the error in calculating the coordinates of the object, at a distance of up to 100 meters to the object, RMSE - 0.447%, MAPE - 0.397, to increase the performance, it took 0, 04 seconds to select the object and determine its coordinates. Conclusion. The article analyzes modern methods for recognizing multispectral images, presents the principles on which each method is based, gives advantages and disadvantages. The authors have developed a method and an algorithm that make it possible to identify static and dynamic obstacles along the route of a mobile platform, based on a sequence of images obtained in different spectral ranges. In the course of experimental studies, the performance of the proposed solutions and compliance with the specified requirements for accuracy and reliability were confirmed.

Cognitive gadgets and cognitive priors

2019 ◽  
Vol 42 ◽  
Author(s):  
Gian Domenico Iannetti ◽  
Giorgio Vallortigara
Keyword(s):  
Cognitive Neuroscience ◽  
Selection Of

Abstract Some of the foundations of Heyes’ radical reasoning seem to be based on a fractional selection of available evidence. Using an ethological perspective, we argue against Heyes’ rapid dismissal of innate cognitive instincts. Heyes’ use of fMRI studies of literacy to claim that culture assembles pieces of mental technology seems an example of incorrect reverse inferences and overlap theories pervasive in cognitive neuroscience.

Note on Selection of Coordinate Systems for Geodynamics

1975 ◽  
Vol 26 ◽  
pp. 395-407
Author(s):  
S. Henriksen
Keyword(s):  
Sea Level ◽  
The Other ◽  
Coordinate Systems ◽  
Mean Sea Level ◽  
The Earth ◽  
The One ◽  
Static Systems ◽  
Selection Of

The first question to be answered, in seeking coordinate systems for geodynamics, is: what is geodynamics? The answer is, of course, that geodynamics is that part of geophysics which is concerned with movements of the Earth, as opposed to geostatics which is the physics of the stationary Earth. But as far as we know, there is no stationary Earth – epur sic monere. So geodynamics is actually coextensive with geophysics, and coordinate systems suitable for the one should be suitable for the other. At the present time, there are not many coordinate systems, if any, that can be identified with a static Earth. Certainly the only coordinate of aeronomic (atmospheric) interest is the height, and this is usually either as geodynamic height or as pressure. In oceanology, the most important coordinate is depth, and this, like heights in the atmosphere, is expressed as metric depth from mean sea level, as geodynamic depth, or as pressure. Only for the earth do we find “static” systems in use, ana even here there is real question as to whether the systems are dynamic or static. So it would seem that our answer to the question, of what kind, of coordinate systems are we seeking, must be that we are looking for the same systems as are used in geophysics, and these systems are dynamic in nature already – that is, their definition involvestime.

Measurements of the Cape Astrometric Survey of the Southern Hemisphere

1978 ◽  
Vol 48 ◽  
pp. 515-521
Author(s):  
W. Nicholson
Keyword(s):  
Southern Hemisphere ◽  
Automatic Measuring ◽  
Measuring Machine ◽  
Final Selection ◽  
Selection Of

SummaryA routine has been developed for the processing of the 5820 plates of the survey. The plates are measured on the automatic measuring machine, GALAXY, and the measures are subsequently processed by computer, to edit and then refer them to the SAO catalogue. A start has been made on measuring the plates, but the final selection of stars to be made is still a matter for discussion.

Application of Improved Voltage Compensation in the SEM to Imaging of Organic Materials

1973 ◽  
Vol 31 ◽  
pp. 444-445
Author(s):  
P.J. Killingworth ◽  
M. Warren
Keyword(s):  
Electron Beam ◽  
Organic Materials ◽  
Operating Parameters ◽  
Low Density ◽  
Beam Diameter ◽  
Incident Electron Beam ◽  
Specimen Material ◽  
Voltage Compensation ◽  
Selection Of ◽  
Scanning Electron

Ultimate resolution in the scanning electron microscope is determined not only by the diameter of the incident electron beam, but by interaction of that beam with the specimen material. Generally, while minimum beam diameter diminishes with increasing voltage, due to the reduced effect of aberration component and magnetic interference, the excited volume within the sample increases with electron energy. Thus, for any given material and imaging signal, there is an optimum volt age to achieve best resolution.In the case of organic materials, which are in general of low density and electric ally non-conducting; and may in addition be susceptible to radiation and heat damage, the selection of correct operating parameters is extremely critical and is achiev ed by interative adjustment.

Selection and Preparation of Specific Tissue Regions For Tem Using Large Epoxy-Embedded Blocks

1973 ◽  
Vol 31 ◽  
pp. 324-325 ◽  
Author(s):  
P. M. Lowrie ◽  
W. S. Tyler
Keyword(s):  
Electron Microscopy ◽  
Anatomical Structures ◽  
Ultrastructural Studies ◽  
Transmission Electron ◽  
Microscopic Evaluation ◽  
Embedded Blocks ◽  
Specific Tissue ◽  
Definition Of ◽  
Areas Of Interest ◽  
Selection Of

The importance of examining stained 1 to 2μ plastic sections by light microscopy has long been recognized, both for increased definition of many histologic features and for selection of specimen samples to be used in ultrastructural studies. Selection of specimens with specific orien ation relative to anatomical structures becomes of critical importance in ultrastructural investigations of organs such as the lung. The uantity of blocks necessary to locate special areas of interest by random sampling is large, however, and the method is lacking in precision. Several methods have been described for selection of specific areas for electron microscopy using light microscopic evaluation of paraffin, epoxy-infiltrated, or epoxy-embedded large blocks from which thick sections were cut. Selected areas from these thick sections were subsequently removed and re-embedded or attached to blank precasted blocks and resectioned for transmission electron microscopy (TEM).

The DQE of an electron image recording system

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.

Applications of Transmission Electron Microscopy in the Characterization of Metal Machinability

1968 ◽  
Vol 26 ◽  
pp. 442-443 ◽  
Author(s):  
L.E. Murr ◽  
A.B. Draper
Keyword(s):  
Electron Microscopy ◽  
State Physics ◽  
Test Material ◽  
Milling Machine ◽  
Rotary Table ◽  
Solid State Physics ◽  
Materials Properties ◽  
Transmission Electron ◽  
Selection Of

The industrial characterization of the machinability of metals and alloys has always been a very arbitrarily defined property, subject to the selection of various reference or test materials; and the adoption of rather naive and misleading interpretations and standards. However, it seems reasonable to assume that with the present state of knowledge of materials properties, and the current theories of solid state physics, more basic guidelines for machinability characterization might be established on the basis of the residual machined microstructures. This approach was originally pursued by Draper; and our presentation here will simply reflect an exposition and extension of this research.The technique consists initially in the production of machined chips of a desired test material on a horizontal milling machine with the workpiece (specimen) mounted on a rotary table vice. A single cut of a specified depth is taken from the workpiece (0.25 in. wide) each at a new tool location.

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