Experimental research of characteristics of the thermal stabilizer of the soil in changing weather conditions

To improve the comfort of using the car, it became necessary to develop an engine autostart system. This system will integrate it into the car's anti-theft system and improve the use of the car regardless of weather conditions. The introduction of such a system will make it possible to increase the range of messages about alarms and the state of the alarm, the small value of which in old models due to the growth of abductions, the lack of close parking places has absolutely ceased to satisfy the driver. The analysis of the existing engine autostart systems is carried out, in which the main problem is highlighted, namely, the impossibility of pro-lime engine autostart at a long distance. As a result of the analysis, the goal of the study was highlighted: the expansion of the functional and consumer capabilities of the auto-alarm system. The developed remote start system is designed for sound and optical notification of violation of the protected vehicle zones, prevention of theft and robbery, remote execution of service functions. The result of the research is: the development of a working model and software, as well as experimental research. The originality lies in the fact that the constructed circuit allows monitoring and control of the autostart functions of the car engine from almost any distance (limited by the GSM reception area).

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Counting trees - methods of automatic analysis of photogrammetric data in forests of the continental region

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/942/1/012030 ◽

2021 ◽

Vol 942 (1) ◽

pp. 012030

Author(s):

K Budnik ◽

J Byrtek ◽

A Kapusta

Keyword(s):

Experimental Research ◽

Template Matching ◽

Weather Conditions ◽

Automatic Analysis ◽

Mixed Forests ◽

Small Airplanes ◽

Counting Trees

Abstract The paper is devoted to the methods of automatic analysis of photogrammetric data in forests of the continental region. It also discusses how automatic tree counting can be used to manage forests. Experimental research was conducted to verify two methods: Faster R-CNN and Template Matching to automatically detecting tree objects in the continental region characterized by mixed forests with a large predominance of conifers. The research was done based on photogrammetric data taken in four areas belonging to forest districts subordinate to the Regional Directorate of State Forests in Zielona Góra. Data was collected from drones and small airplanes with a photogrammetric container. The results show that both methods can be used for analyzes in specific cases. Moreover, the level of Recall shows the advantage of Faster R-CNN methods for the photogrammetric data collected during the flights in various weather conditions.

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Experimental research into the low-temperature characteristics of a hydraulic damper and the effect on the dynamics of the pantograph of a high-speed train running in extreme cold weather conditions

Proceedings of the Institution of Mechanical Engineers Part F Journal of Rail and Rapid Transit ◽

10.1177/0954409719879029 ◽

2019 ◽

Vol 234 (8) ◽

pp. 896-907

Author(s):

Wenlin Wang ◽

Yuwen Liang ◽

Weihua Zhang ◽

Simon Iwnicki

Keyword(s):

Low Temperature ◽

Experimental Research ◽

High Speed ◽

Weather Conditions ◽

Cold Weather ◽

Temperature Characteristics ◽

Hydraulic Damper ◽

Damping Characteristics ◽

High Speed Trains ◽

Extreme Cold

There is likely to be a demand to run high-speed trains in extreme cold weather conditions in the near future; therefore, it is important to study the change in the characteristics of the materials and components in an extreme cold environment and their effects on the vehicle system dynamics. Experimental research into the low temperature characteristics of a pantograph hydraulic damper was carried out in this study. The results show that low temperature causes an increase in damping forces, and when the temperature is above the boundary temperature range, most indices of the damping capability increase with the decrease of temperature; when the temperature is below the boundary temperature range, most indices decrease with the decrease of temperature. Key parameters are identified to obtain the theoretical description of low-temperature damping characteristics using a simplified-parametric damper model and the experimental data. A mathematical model of the pantograph–catenary system incorporating the pantograph damper model is then established to calculate the effect of the damper performance on the pantograph dynamics low temperatures. Simulation results show that the lowering performance of the pantograph deteriorates noticeably due to the unstable low-temperature damping characteristics, but the deterioration of the raising performance and contact quality of the pantograph due to the low-temperature characteristics of the damper are less obvious. The results obtained in this study are valuable for understanding the low-temperature characteristics of a hydraulic damper, and instructive in the optimal specification of the pantograph damper for high-speed trains running in cold weather conditions.

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Using Statistically Based Modeling for Vehicle Dynamics

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1036.564 ◽

2014 ◽

Vol 1036 ◽

pp. 564-567 ◽

Cited By ~ 1

Author(s):

Constantin Ovidiu Ilie ◽

Dănuț Grosu ◽

Oana Mocian ◽

Radu Vilău ◽

Daniela Bartiș

Keyword(s):

Experimental Data ◽

Experimental Research ◽

Vehicle Dynamics ◽

Weather Conditions ◽

Dynamic Parameters ◽

Multiple Linear Regressions ◽

Warm Weather ◽

Program Objective ◽

Analytical Expressions ◽

Linear Regressions

This paper is a result of a research focused on statistical vehicles dynamics. Its main purpose is to establish mathematical description of vehicle dynamics based on statistically sufficient experimental data and using statistical instruments. The results are analytical expressions and graphical representations that can be used in situations other than those the data were obtained. Experimental research program objective was to obtain a variety of data to define the dynamics of a vehicle. It involved a large number of tests, more than 100, on different runways, pavement, mosaic tiles or asphalt. They were performed in various weather conditions, sunny and warm weather or rain or sleet and snow. The driving style varied between normal and sport ones. The experimental data were used in obtaining mathematical models that define certain dependency between dynamic parameters. There were issued multiple linear regressions with one resulting parameter. If we analyzed the models we issued we notice that the more factorial parameters are involved, the higher the accuracy of the model we get.

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Secondary Transfer Effect of Contact

Social Psychology ◽

10.1027/1864-9335.40.2.55 ◽

2009 ◽

Vol 40 (2) ◽

pp. 55-65 ◽

Cited By ~ 146

Author(s):

Thomas F. Pettigrew

Keyword(s):

Cognitive Dissonance ◽

Experimental Research ◽

Intergroup Contact ◽

Transfer Effect ◽

Evaluative Conditioning ◽

Transfer Effects ◽

Secondary Transfer ◽

Primary Reduction

This paper reviews the evidence for a secondary transfer effect of intergroup contact. Following a contact’s typical primary reduction in prejudice toward the outgroup involved in the contact, this effect involves a further, secondary reduction in prejudice toward noninvolved outgroups. Employing longitudinal German probability samples, we found that significant secondary transfer effects of intergroup contact exist, but they were limited to specific outgroups that are similar to the contacted outgroup in perceived stereotypes, status or stigma. Since the contact-prejudice link is bidirectional, the effect is inflated when prior prejudice reducing contact is not controlled. The strongest evidence derives from experimental research. Both cognitive (dissonance) and affective (evaluative conditioning) explanations for the effect are offered.

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