Definition of quantitative performance parameters for analog measuring systems

1975 ◽  
Vol 18 (5) ◽  
pp. 661-662
Author(s):  
I. V. Kulikov
Keyword(s):  
Performance Parameters ◽  
Measuring Systems ◽  
Analog Measuring ◽  
Quantitative Performance ◽  
Definition Of

scholarly journals Smart Skin Envelope

2011 ◽  
Author(s):  
Rosa Romano
Keyword(s):  
State Of The Art ◽  
Innovation Process ◽  
Research Programme ◽  
Energy Performance ◽  
Indoor Environments ◽  
Performance Parameters ◽  
Skin Envelope ◽  
And Performance ◽  
Definition Of ◽  
Smart Skin

The Smart Skin Envelope research analyses the recent revolution that has taken place in the sector of planning and production of smart skin components, made up of dynamic layers. The aim is to identify the technological, functional, qualitative and performance parameters that guide the decisions of the actors in the innovation process. It explores the factors that drive them to develop solutions and proposals designed to transform the envelope of the building from a static to a dynamic element, featuring interoperable components that can interact with the input from the outdoor and indoor environments, in relation to which the smart skin acts as a system of boundary and delimitation. The proposed research programme explores in particular the sector of Smart Envelopes, setting as its priority objective the identification and definition of the energy performance, both through analysis of the state of the art and through the development of a facade component that is dynamic in terms of the adaptive variability of its performance.

scholarly journals Method of test blanks in assurance of surface roughness parameters of machine parts

2018 ◽  
pp. 9-14
Author(s):  
Олег Горленко ◽  
Oleg Gorlenko
Keyword(s):  
Rough Surface ◽  
Statistical Approach ◽  
Roughness Parameter ◽  
Surface Profile ◽  
Roughness Parameters ◽  
Measuring Systems ◽  
Technological Support ◽  
Machine Parts ◽  
Definition Of ◽  
Parameter Values

A method for technological support of roughness parameters for machine parts based on an experimental statistical approach is considered. The essence of the method consists in the processing of test blanks (or their test surfaces) according to a pre-planned scheme, in the roughness parameter assessment of test blanks, in the development of mathematical statistical model of the connection of roughness parameters with technological factors and on the basis of the model given a definition of their levels ensuring obtaining the roughness parameter values specified at machining a basic batch blanks. The peculiarities in technological support of relative supporting lengths of a rough surface profile and also a method for the formation of complex functional parameters of a rough surface are touched upon. The necessity for the creation of portable control measuring systems allowing the realization in practice this method is emphasized.

scholarly journals Mass and performance estimation of hydrogen and battery powered transport aircraft concepts

2021 ◽  
Author(s):  
Viktor Babčan ◽  
◽  
Michal Janovec
Keyword(s):  
Fuel Cell ◽  
Performance Estimation ◽  
Performance Parameters ◽  
Commercial Aircraft ◽  
Transport Aircraft ◽  
And Performance ◽  
Definition Of

This article introduces the scope and activities linked to an end of studies project. This project is a collaboration between UNIZA and ENAC and includes work of Pascal Roches and Thierry Druot on top of the student and his UNIZA tutor mentioned above. This article describes the environment of ENAC and the particular department CADO in which the project is being accomplished. It also sets the definition of the project, its main goals and deliverables. Finally, it shows methods of the work that has been done so far, that is the completion of the database of 324 commercial aircraft, which took the largest amount of time so far. It also introduces the software, which will be used to define different models required to calculate initial dimensions and performance parameters of battery or fuel cell concept aircraft.

scholarly journals Cloud Computing Modeling and Simulation using Cloud Sim Environment

2019 ◽  
Vol 8 (2) ◽  
pp. 5439-5445
Keyword(s):  
Cloud Computing ◽  
Modeling And Simulation ◽  
Turnaround Time ◽  
Performance Parameters ◽  
Total Execution Time ◽  
Software Infrastructure ◽  
Pros And Cons ◽  
Definition Of ◽  
Average Turnaround Time ◽  
Simulation Time

Cloud computing is a major technology in the development of internet services, and it delivers software, infrastructure and platform. It enables the client to offer-based services in a pay-per-use concept. So, it offers a less expensive and easy way of managing things. In this paper, we introduce a formal definition of CloudSim simulator, including its architecture, reasons for adopting for modeling and simulation, pros and cons. Moreover, CloudSim versions and how to implement the cloud environment using CloudSim. Further, we demonstrate that cloudlet scheduler policy TimeShared, SpaceShared and DynamicWorkload approach for VM scheduler TimeShared policy are compared on the bases of some performance parameters in term of average turnaround time, throughput, total execution time and total simulation time. These parameters outperform in DynamicWorkload cloudlet scheduler policy than TimeShared and SpaceShared approach for TimeShared VM scheduler policy. This work is anticipated to the beginner of the field to choose CloudSim simulation platform and suitable approaches for cloud computing

scholarly journals ASSESSMENT OF INFLUENCE OF RANGE FINDERS WITH THE IMPROVED CHARACTERISTICS ON THE ACCURACY OF GEOMETRICAL PARAMETERS CONTROL OF VEHICLES

2018 ◽  
Vol 15 (4) ◽  
pp. 526-537
Author(s):  
A. M. Askhabov ◽  
E. S. Voevodin ◽  
V. A. Zeer ◽  
A. S. Kashura
Keyword(s):  
Mean Square Error ◽  
Geometrical Parameters ◽  
Control Points ◽  
Mean Square ◽  
Measuring Systems ◽  
Laser Range ◽  
Laser Range Finders ◽  
The Mean ◽  
Definition Of ◽  
Error Of Measurement

Introduction. The purpose of the research is the determination of parameters and characteristics of the laser measuring systems providing decrease in errors of measurement of geometrical parameters of vehicles.The goal is achieved at the expense of the solution of the relevant task connected with the parameters research of the laser equipment and definition of requirements to accuracy (a passport error) of the laser range finders applied at geometrical parameters control of vehicles.Methods and materials. The algorithm of calculation of spatial coordinates of the car points and errors of their definition has been created and used for the research. In this case calculations of spatial provision of the point and its error have been reduced to definition and to the solution of the equations system of the second order in the MathCAD program environment. As the controlled and measured parameters at coordinates’ calculation of distances from laser measuring instruments to the studied car points were accepted.Results. As aresult, the mean square error of measurement of distance between control points significantly decreases at reduction of the passport error of laser range finders. At the size of the passport error of laser range finders equals 0,8 mm, the mean square error of measurement of distance between control points (from 0 to 3000 mm) equals 2,2-2,9 mm, and an error of definition of the control point is 1,5-1,9 mm.Discussion and conclusion. The conducted research demonstrates that it is necessary to compare the reached accuracy parameters at the set configuration of laser measuring system with the shown standard restrictions for an error of measurements. Therefore, further improvement of characteristics of accuracy of measuring systems is possible due to progressive decrease in an error of laser range finders as a result of their technical improvement.

Towards a New Concept of In-Line Crankshaft Balancing by Contact Less Measurement: Process for Selecting the Best Digitizing System

2012 ◽  
Author(s):  
Alexandre Zuquete-Guarato ◽  
Charyar Mehdi-Souzani ◽  
Yann Quinsat ◽  
Claire Lartigue ◽  
Leila Sabri
Keyword(s):  
Quality Indicators ◽  
High Precision ◽  
Measurement Process ◽  
Scanning System ◽  
Specific Procedure ◽  
Measuring Systems ◽  
Accessibility Issues ◽  
Definition Of

Controlling the part’s balance of crankshafts are important issues for automotive manufacturers. Unbalance measurement is usually carried out using high-precision mechanical machines. The main objective of the present work is to replace mechanical measuring systems by a non-contact digitizing system, which permits the acquisition of the crankshaft surface. As the geometry to be measured presents a large variety of shapes and textures with accessibility issues, the definition of the best-suited scanning system related to geometrical and industrial constraints is a major issue. In this direction, the paper deals with the definition of a protocol based on quality indicators associated to the collected data to compare various digitizing systems. Those quality indicators are assessed thanks to simple artifacts measurement according to a specific procedure. The comparison protocol is applied to evaluate three triangulation based digitizing systems: Results allow us to identify well-adapted digitizing systems in relation to crankshaft balancing requirements.

Introductory paper

1966 ◽  
Vol 24 ◽  
pp. 3-5
Author(s):  
W. W. Morgan
Keyword(s):  
Line Intensity ◽  
Classification Scheme ◽  
Two Dimensional ◽  
Spectral Classification ◽  
Dimensional Array ◽  
Rr Lyrae ◽  
Metallic Line ◽  
Introductory Paper ◽  
Parameter Varying ◽  
Definition Of

1. The definition of “normal” stars in spectral classification changes with time; at the time of the publication of theYerkes Spectral Atlasthe term “normal” was applied to stars whose spectra could be fitted smoothly into a two-dimensional array. Thus, at that time, weak-lined spectra (RR Lyrae and HD 140283) would have been considered peculiar. At the present time we would tend to classify such spectra as “normal”—in a more complicated classification scheme which would have a parameter varying with metallic-line intensity within a specific spectral subdivision.

2.2. Working Group 2: Conceptual Definitions of Reference Coordinate Systems for Earth Dynamics

1975 ◽  
Vol 26 ◽  
pp. 21-26
Keyword(s):  
Coordinate System ◽  
Working Group ◽  
General Character ◽  
Coordinate Systems ◽  
Reference Coordinate System ◽  
Group 2 ◽  
Definition Of ◽  
Earth Dynamics

An ideal definition of a reference coordinate system should meet the following general requirements:1. It should be as conceptually simple as possible, so its philosophy is well understood by the users.2. It should imply as few physical assumptions as possible. Wherever they are necessary, such assumptions should be of a very general character and, in particular, they should not be dependent upon astronomical and geophysical detailed theories.3. It should suggest a materialization that is dynamically stable and is accessible to observations with the required accuracy.

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