BORDER CONDITIONS FOR IDENTIFICATION OF THE CHARACTERISTIC POINTS OF GEOHOD KNIFE EXECUTIVE BODY

Abstract The article presents a mathematical model for determining the values of the characteristic points of the knife executive body (EB) of the geokhod. For this, the boundary conditions for determining the characteristic points on the radial knife of the geokhod executive body are indicated. The result of the work are the obtained expressions for determining: P a.c is the the projection of the component of the soil cutting force, depending on the cutting width, onto the main axis of rotation of the geokhod, R e.a.c is the projection of the component of the cutting force of the soil on the plane, which is located perpendicular to the main axis of rotation of the geokhod. Based on the work carried out, tasks for further research were identified.

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Regulatory Guillotine in the Field of Industrial Safety

Occupational Safety in Industry ◽

10.24000/0409-2961-2020-11-22-28 ◽

2020 ◽

pp. 22-28

Author(s):

E.V. Klovach ◽

◽

A.S. Pecherkin ◽

V.K. Shalaev ◽

V.I. Sidorov ◽

...

Keyword(s):

Russian Federation ◽

Preventive Measures ◽

Regulatory System ◽

Industrial Safety ◽

State Control ◽

Regulatory Impact ◽

The Russian Federation ◽

The Law ◽

The Government ◽

Executive Body

In Russia, the reform of the regulatory guillotine is being implemented in the field of control and supervisory activity. It should result in a new regulatory system formed according to the principles specified in the key federal laws: «On state control (supervision) and municipal control in the Russian Federation» (Law on Control) and «On mandatory requirements in the Russian Federation» (Law on Mandatory Requirements) adopted in August 2020. In the field of industrial safety, this process was launched by the Decree of the Government of the Russian Federation № 1192, which will come into force on January 1, 2021. The main provisions are discussed in the article, which are related to the Law on Control and the Law on Mandatory Requirements. The Law on Control establishes the priority of preventive measures aimed at reducing the risk of causing harm in relation to the control activities, the grounds for carrying out control (supervisory) activities, the types of these activities in the forms of interaction with the controlled person and without such, the procedure for presentation of the results of control (supervisory) activity. The Law on Mandatory Requirements establishes that the provisions of regulatory legal acts should enter into force either from March 1 or September 1, but not earlier than 90 days after their official publication, and their validity period should not exceed 6 years. The drafts of regulatory legal acts developed by the federal executive bodies are subject to regulatory impact assessment. With a view to ensuring systematization of mandatory require ments, their register is kept. The federal executive body prepares a report on the achievement of the goals of mandatory requirements introduction. By January 1, 2021, 10 resolutions of the Government of the Russian Federation, 48 federal norms and rules in the field of industrial safety and 9 other regulatory legal acts of Rostechnadzor should be adopted. The drafts of all the documents are already prepared, some of the acts are completing the process of discussion and approval.

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FACTOR ANALYSIS OF GEOGRAPHIC COORDINATES AT POINTS OF THE CHANNEL OF A SMALL RIVER ON SPACE IMAGES

GEOLINKS Conference proceedings, Book 1 Volume 2 ◽

10.32008/geolinks2020/b1/v2/24 ◽

2020 ◽

Author(s):

Peter Matveevich Mazurkin ◽

Yana Oltgovna Georgieva

Keyword(s):

Correlation Coefficient ◽

Geographical Location ◽

Small River ◽

Binary Relations ◽

Catchment Basin ◽

Space Images ◽

The North ◽

Inverse Effect ◽

Characteristic Points ◽

Fractal Representation

The purpose of the article is the analysis of asymmetric wavelets in binary relations between three coordinates at 290 characteristic points from the source to the mouth of the small river Irovka. The hypsometric characteristic is the most important property of the relief. The Irovka River belongs to a low level, at the mouth it is 89 m high, and at the source it is 148 m above sea level. Modeling of binary relations with latitude, longitude, and height has shown that local latitude receives the greatest quantum certainty. In this case, all paired regularities received a correlation coefficient of more than 0.95. Such a high adequacy of wave patterns shows that geomorphology can go over to the wave multiple fractal representation of the relief. The Irovka River is characterized by a small anthropogenic impact, therefore, the relief over a length of 69 km has the natural character of the oscillatory adaptation of a small river to the surface of the Vyatka Uval from its eastern side. This allows us to proceed to the analysis of the four tributaries of the small river Irovka, as well as to model the relief of the entire catchment basin of 917 km2. The greatest adequacy with a correlation coefficient of 0.9976 was obtained by the influence of latitude on longitude, that is, the geographical location of the relief of the river channel with respect to the geomorphology of the Vyatka Uval. In second place with a correlation of 0.9967 was the influence of the height of the points of the channel of the small river on local longitude and it is also mainly determined by the relief of the Vyatka Uval. In third place was the effect of latitude on height with a correlation coefficient of 0.9859. And in last sixth place is the inverse effect of altitude on local latitude in the North-South direction.

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DYNAMIC MODELING OF A QUICKLY EXPOSING ABOUT PIEZOHYDRAL EXECUTIVE BODY ANTI-SCREW PRESS

Reliability and Quality of Complex Systems ◽

10.21685/2307-4205-2018-4-5 ◽

2018 ◽

Author(s):

V. P. Perevertov ◽

◽

E. A. Kuzina ◽

G. P. Razzhivina ◽

◽

...

Keyword(s):

Dynamic Modeling ◽

Screw Press ◽

Executive Body

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The Effect of Subgrade Coefficient on Static Work of a Pontoon Made as a Monolithic Closed Tank

Applied Sciences ◽

10.3390/app11094259 ◽

2021 ◽

Vol 11 (9) ◽

pp. 4259

Author(s):

Anna Szymczak-Graczyk

Keyword(s):

Minimum Energy ◽

Floating Platform ◽

Static Work ◽

One Stage ◽

Single Piece ◽

Characteristic Points ◽

Internal Partition ◽

Conducting Research ◽

Metacentric Height ◽

Made In

This article presents the effect of taking into account the subgrade coefficient on static work of a pontoon with an internal partition, made in one stage and treated computationally as a monolithic closed rectangular tank. An exemplary pontoon is a single, ready-made shipping element that can be used as a float for a building. By assembling several floats together, the structure can form a floating platform. Due to the increasingly violent weather phenomena and the necessity to ensure safe habitation for people in countries at risk of inundation or flooding, amphibious construction could provide new solutions. This article presents calculations for a real pontoon made in one stage for the purpose of conducting research. Since it is a closed structure without any joint or contact, it can be concluded that it is impossible for water to get inside. However, in order to exclude the possibility of the pontoon filling with water, its interior was filled with Styrofoam. For static calculations, the variational approach to the finite difference method was used, assuming the condition for the minimum energy of elastic deflection during bending, taking into account the cooperation of the tank walls with the Styrofoam filling treated as a Winkler elastic substrate and assuming that Poisson’s ratio ν = 0. Based on the results, charts were made illustrating the change in bending moments at the characteristic points of the analysed tank depending on acting loads. The calculations included hydrostatic loads on the upper plate and ice floe pressure as well as buoyancy, stability and metacentric height of the pontoon. The aim of the study is to show a finished product—a single-piece pontoon that can be a prefabricated element designed for use as a float for “houses on water”.

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Error Characteristic Analysis of Fluid Momentum Law Test Apparatus

Applied Sciences ◽

10.3390/app11010090 ◽

2020 ◽

Vol 11 (1) ◽

pp. 90

Author(s):

Song Yang ◽

Xianyong Zhu ◽

Hui Wang

Keyword(s):

Measurement Error ◽

Control Method ◽

Theoretical Research ◽

Structural Deformation ◽

Error Characteristic ◽

Characteristic Analysis ◽

Jet Impact ◽

Effect Theory ◽

Characteristic Points ◽

Periodic Error

The flat-plate momentum test bench is a widely used experimental device in the verification of the momentum law of fluid mechanics, and its error characteristics are of positive significance for theoretical research and engineering innovation and expansion. The SPH-FEM coupling algorithm and spectrum analysis method are used to calculate and analyze the displacement response and spectrum characteristics of the characteristic points of the sensor under different jet loads. Based on them, the cause, classification, law, scope, influence and control method of the measurement error of the system are discussed and analyzed with the application of the error theory and the lateral effect theory of strain gauges; combined with physical experiments, the relevant analysis methods and conclusions are verified. The results show that the measurement error of the system includes linear error and periodic error. Structural deformation in the direction of jet impact is the main source of linear error; linear error increases with the increase of jet loads. Meanwhile, periodic vibration in non-jet direction is the main cause of periodic error, and the periodic error decreases with the increase of jet loads.

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Blue as an Underrated Alternative to Green: Photoplethysmographic Heartbeat Intervals Estimation under Two Temperature Conditions

Sensors ◽

10.3390/s21124241 ◽

2021 ◽

Vol 21 (12) ◽

pp. 4241

Author(s):

Evgeniia Shchelkanova ◽

Liia Shchapova ◽

Alexander Shchelkanov ◽

Tomohiro Shibata

Keyword(s):

Blue Light ◽

Characteristic Point ◽

Biological Effects ◽

Green Light ◽

Estimation Accuracy ◽

Lower Sensitivity ◽

Light Spectrum ◽

Cardiovascular Parameter ◽

Temperature Conditions ◽

Characteristic Points

Since photoplethysmography (PPG) sensors are usually placed on open skin areas, temperature interference can be an issue. Currently, green light is the most widely used in the reflectance PPG for its relatively low artifact susceptibility. However, it has been known that hemoglobin absorption peaks at the blue part of the spectrum. Despite this fact, blue light has received little attention in the PPG field. Blue wavelengths are commonly used in phototherapy. Combining blue light-based treatments with simultaneous blue PPG acquisition could be potentially used in patients monitoring and studying the biological effects of light. Previous studies examining the PPG in blue light compared to other wavelengths employed photodetectors with inherently lower sensitivity to blue, thereby biasing the results. The present study assessed the accuracy of heartbeat intervals (HBIs) estimation from blue and green PPG signals, acquired under baseline and cold temperature conditions. Our PPG system is based on TCS3472 Color Sensor with equal sensitivity to both parts of the light spectrum to ensure unbiased comparison. The accuracy of the HBIs estimates, calculated with five characteristic points (PPG systolic peak, maximum of the first PPG derivative, maximum of the second PPG derivative, minimum of the second PPG derivative, and intersecting tangents) on both PPG signal types, was evaluated based on the electrocardiographic values. The statistical analyses demonstrated that in all cases, the HBIs estimation accuracy of blue PPG was nearly equivalent to the G PPG irrespective of the characteristic point and measurement condition. Therefore, blue PPG can be used for cardiovascular parameter acquisition. This paper is an extension of work originally presented at the 42nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society.

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Camera Calibration Method Based on Circle Plane Board

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.475-476.184 ◽

2013 ◽

Vol 475-476 ◽

pp. 184-187

Author(s):

Wen Guo Li ◽

Shao Jun Duan

Keyword(s):

Camera Calibration ◽

Calibration Method ◽

Lens Distortion ◽

Edge Extraction ◽

Circle Plane ◽

Circle Centre ◽

Extraction Algorithm ◽

Calibration Algorithm ◽

Characteristic Points ◽

Distortion Parameters

We present a camera calibration method based on circle plane board. The centres of circles on plane are regarded as the characteristic points, which are used to implement camera calibration. The proposed calibration is more accurate than many previous calibration algorithm because of the merit of the coordinate of circle centre being obtained from thousand of of edge pionts of ellipse, which is very reliable to image noise caused by edge extraction algorithm. Experiments shows the proposed algorithm can obtain high precise inner parameters, and lens distortion parameters.

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Analysis of Heat Transfer through PVC Window Profile Reinforced with Ti6Al4V Alloy

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.687.236 ◽

2016 ◽

Vol 687 ◽

pp. 236-242 ◽

Cited By ~ 1

Author(s):

Piotr Lacki ◽

Judyta Różycka ◽

Marcin Rogoziński

Keyword(s):

Heat Transfer ◽

Titanium Alloy ◽

Thermal Insulation ◽

Numerical Models ◽

Characteristic Temperature ◽

Permanent Deformation ◽

Transfer Coefficients ◽

Element Analysis ◽

Ti6al4v Titanium Alloy ◽

Characteristic Points

This requires the use of additional reinforcement in order to prevent excessive or permanent deformation of PVC windows. In the paper particular attention was devoted to space located in a corrosive environment exposed to chemical agents. For this purpose, proposed to change the previously used steel profiles reinforcements made of Ti6Al4V titanium alloy corrosion-resistant in the air, at sea and many types of industrial atmosphere. Analysis of the thermal insulation properties of PVC windows with additional reinforcement of profile Ti6Al4V titanium alloy was performed. PVC window set in a layer of thermal insulation was analyzed. Research was conducted using Finite Element Analysis. Numerical models and thermal calculations were made in the program ADINA, assuming appropriate material parameters. The constant internal temperature of 20 ̊ and an outer-20 ̊ was assumed. The course of temperature distribution in baffle in time 24 hours and graphs of characteristic points was obtained. The time of in which followed the steady flow of heat, as well as the course of isotherm of characteristic temperature in the baffle was determined. On the basis of numerical analysis obtained vector distribution of heat flux q [W/m2] and was determined heat transfer coefficients U [W/m2K] for the whole window with titanium reinforcement . All results were compared with the model of PVC windows reinforced with steel profile.

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Parallel Improvement for a Classical Template Serial Thinning Algorithm

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.271-273.1509 ◽

2011 ◽

Vol 271-273 ◽

pp. 1509-1513 ◽

Cited By ~ 1

Author(s):

Mei Xiu Lu ◽

Fu Rong Wang ◽

Feng Li

Keyword(s):

Mathematical Morphology ◽

Fingerprint Recognition ◽

Thinning Algorithm ◽

Recognition Algorithms ◽

Characteristic Points ◽

Image Thinning ◽

Ideal Algorithm ◽

Improved Algorithm

Image thinning is one of important steps of fingerprint preprocessing. Most of fingerprint recognition algorithms checked the characteristic points on thinning image. In this paper, we discover some shortages in OPTA and mathematical morphology thinning algorithm and find out the reasons for some shortages such as many glitches and snags, defective thinning, and so on. A new improved algorithm is proposed in the paper, which is an ideal algorithm because it is faster, produces less glitch, and thins completely.

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