Research on path planning for reducing vibration fatigue of precision equipment transportation

2021 ◽  
pp. 1-10
Author(s):  
Ying Huang ◽  
Quanmin Xie ◽  
Xingjun Wang
Keyword(s):  
Path Planning ◽  
Fatigue Damage ◽  
Shortest Path ◽  
High Reliability ◽  
Low Risk ◽  
Practical Significance ◽  
Special Equipment ◽  
Highway Transportation ◽  
Vibration Fatigue ◽  
The Relationship

Abstract This paper analyzes the safety and reliability problems of large precision instruments and equipment in highway transportation, aiming at reducing the vibration fatigue damage of equipment to the greatest extent from the perspective of road planning. Based on the dynamic response model of the equipment, the relationship between the ground spectrum response and the cumulative fatigue damage of the equipment is analyzed. Based on the method of probability and statistics, an equipment fatigue prediction model is established. Based on the study of the relationship between the roughness of pavement grade and the reliability of equipment, the low-risk path planning is proposed. This paper adapts the Dijkstra shortest path algorithm. Not only the basic information such as the length of the highway is considered, but also the road factors related to the reliability of the equipment and the environmental factors affecting the driving safety are considered. Try to avoid the adverse environment which has a great impact on the reliability of the equipment, reduce the vibration fatigue of the equipment in the process of transportation and improve the quality of transportation. Using Geographic Information System (GIS) secondary development, database, Global Positioning System (GPS) positioning and other technologies, this paper provides users with the shortest path and low-risk path planning for reference, which has a certain practical significance for highway transportation of high reliability products such as vulnerable products, precision instruments and special equipment.

scholarly journals Semantic Optimization of Feature-Based SLAM

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Peng Li ◽  
Lili Yin ◽  
Jiali Gao ◽  
Yuezhongyi Sun
Keyword(s):  
High Reliability ◽  
Relevant Information ◽  
Target Object ◽  
Practical Significance ◽  
Visual Slam ◽  
Localization And Mapping ◽  
Mapping Technology ◽  
Key Frames ◽  
The Relationship ◽  
Object Level

The purpose of this paper is to provide reasonable recommendation and removal of inappropriate information for SLAM (Simultaneous Localization and Mapping) technology based on feature method. The methodology is to propose a semantic recognition of environment objects in the natural scene through object detection, which is a kind of bag of word method in SLAM problem between the key frames and object level, the method of establishing key frames, and the relationship between the target object levels, through the practical significance of the target object level to judge the merits of the target object level information, and then combined with key frames in the visual SLAM relations with relevant information, so as to get object level targets in each key frame and the relationship between the relevant information, so as to achieve through the object level semantic information to judge the merits of the key frames and screening, as well as to the key frames to judge the merits of the relevant information and screening purpose. The finding of the study is the above method can retain the information of high reliability and good stability for visual SLAM and process the key frames with poor reliability or low stability and the information related to key frames.

Editor’s Pick: Regulatory and Ethical Issues in the New Era of Radiomics and Radiogenomics

EMJ Radiology ◽  
2020 ◽  
Author(s):  
Filippo Pesapane
Keyword(s):  
Ethical Issues ◽  
Medical Images ◽  
Practical Significance ◽  
Innovative Technology ◽  
New Era ◽  
Naked Eye ◽  
Disease Characteristics ◽  
The Future ◽  
Using Data ◽  
The Relationship

Radiomics is a science that investigates a large number of features from medical images using data-characterisation algorithms, with the aim to analyse disease characteristics that are indistinguishable to the naked eye. Radiogenomics attempts to establish and examine the relationship between tumour genomic characteristics and their radiologic appearance. Although there is certainly a lot to learn from these relationships, one could ask the question: what is the practical significance of radiogenomic discoveries? This increasing interest in such applications inevitably raises numerous legal and ethical questions. In an environment such as the technology field, which changes quickly and unpredictably, regulations need to be timely in order to be relevant.  In this paper, issues that must be solved to make the future applications of this innovative technology safe and useful are analysed.

A Functional Reading of the Epicurean Classification of Desires

Apeiron ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Jan Maximilian Robitzsch
Keyword(s):  
Human Nature ◽  
Practical Significance ◽  
Textual Evidence ◽  
The Relationship

Abstract This paper examines the classification of desires that the Epicureans offer in their writings. It surveys the extant textual evidence for the classification and discusses the relationship between natural and necessary, natural and unnecessary, and unnatural and unnecessary desires. It argues that while the practical significance of the Epicurean classification is clear, which desires fall into which class is not. The paper suggests the reason for this may be that the Epicureans acknowledge some variability in their concept of human nature, arguing for a functional reading of the Epicurean classification of desires.

The Theoretical and Empirical Research on Pricing of China's Carbon Emission Permits

2012 ◽  
Vol 524-527 ◽  
pp. 2474-2481
Author(s):  
Zhi Gang Huang ◽  
Jiao Ling Xie ◽  
Wen Ping Wu
Keyword(s):  
Option Pricing ◽  
Carbon Emissions ◽  
Carbon Emission ◽  
Supply And Demand ◽  
Practical Significance ◽  
Emission Permits ◽  
Transaction Data ◽  
Carbon Finance ◽  
Relationship Of ◽  
The Relationship

Carbon emissions permits has its own particularity,and with the development of carbon finance,carbon emissions permits possess the commodity attributes and financial attributes.So its price isn’t determined only by the relationship of commodity supply and demand,but also affected by a variety of factors.But because the transaction data is not available,so the pricing of the carbon emissions permits can not really consider from the angle of the influencing factors of price.Therefore, this paper is on the basis of previous studies using mathematical tools and introducing the option pricing mechanism to study th pricing of China's carbon emissions permits basing on carbon emissions,which is designed for providing reference on the pricing of China's carbon emissions,being of both theoretical and practical significance.

ANALYSIS OF THE ERROR IN DETERMINING THE EQUIVALENT SIZE OF A DEFECT BY THE STANDARDLESS METHOD DURING ULTRASONIC TESTING

2021 ◽  
pp. 50-57
Author(s):  
A. N. Kireev ◽  
M. A. Kireeva
Keyword(s):  
Relative Error ◽  
High Reliability ◽  
Ultrasonic Method ◽  
Experimental Studies ◽  
Standard Samples ◽  
Defect Identification ◽  
Identification Method ◽  
Maximum Value ◽  
Software Product ◽  
The Relationship

The article provides a review and analysis of the defect identification method for determining the size of discontinuities when diagnosing various machine parts and units by the manual ultrasonic method. This method makes it possible to determine the equivalent size of discontinuities of various types without using standard samples of an enterprise: point planar and volumetric; extended planar and volumetric. The method is based on the use of the relationship between the amplitude and time characteristics of the echo signal from the discontinuity and the backside signal in the object being diagnosed and the equivalent size of the discontinuity. The article presents the mathematical apparatus for the implementation of this method. Also presented is a software product that allows you to automate calculations when using this defect identification method. The article contains experimental studies of the method for determining the equivalent dimensions of discontinuities of various types, which have shown its high reliability. The maximum value of the relative error in determining the equivalent size of a point planar discontinuity was 2.867 %. The maximum value of the relative error in determining the equivalent size of a point volumetric discontinuity was 1.986 %. The maximum value of the relative error in determining the transverse equivalent size of an extended planar discontinuity was 0.667 %. The maximum value of the relative error in determining the transverse equivalent size of an extended volumetric discontinuity was 1.95 %.

Flow-Induced Vibration Fatigue Damage of A Pair of Flexible Cylinders in A Staggered Array

2021 ◽  
Vol 35 (6) ◽  
pp. 878-890
Author(s):  
Wan-hai Xu ◽  
Yu-han Li ◽  
Kun Jia ◽  
Jiang Lai
Keyword(s):  
Fatigue Damage ◽  
Flow Induced Vibration ◽  
Vibration Fatigue

A system of values and economic behaviour models of young entrepreneurs

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Svetlana D. Gurieva ◽  
Oksana V. Zashchirinskaia
Keyword(s):  
Real Life ◽  
Statistical Processing ◽  
Economic Education ◽  
Practical Significance ◽  
Russian Society ◽  
Content Type ◽  
Economic Behaviour ◽  
Behaviour Models ◽  
The Relationship ◽  
Young Entrepreneurs

Purpose The purpose of this paper is to investigate the relationship of values with individual economic behaviour, identifies the correlation between personality values that are conditioned upon the culture, and evaluations of economic behaviour situations on the example of Russian culture. Design/methodology/approach This study involved 222 people of Russian nationality, young entrepreneurs employed in the commercial field, developing their own business. The following methods were used in the study: the methodology for measuring the values of an individual and cultural level; Melbourne Decision Making Questionnaire, a scenario methodology for economic behaviour, which is a short behavioural scenario (model of behaviour), taken from real life. The statistical processing of experimental data was carried out using the IBM SPSS Statistics Version 21 software package. Findings The values with correlated progressive and regressive economic forms of behaviour were identified for modern Russian society. The correlation of factors with progressive and regressive economic behaviour was also identified. Practical implications The practical significance of the study lies in the possibility of applying the results obtained not only in the system of economic education but also in programs to support the business activity of young entrepreneurs. Originality/value The value of this study is determined by the fact that it can be placed in a broader context of research into the relationship between the levels of human consciousness and his behaviour.

scholarly journals Novel Kinetic Models of Xylan Dissolution and Degradation during Ethanol Based Auto-Catalyzed Organosolv Pretreatment of Bamboo

Polymers ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1149 ◽  
Author(s):  
Jing Liu ◽  
Zhenggang Gong ◽  
Guangxu Yang ◽  
Lihui Chen ◽  
Liulian Huang ◽  
...  
Keyword(s):  
Kinetic Models ◽  
Degradation Products ◽  
Practical Significance ◽  
Order Kinetic ◽  
Organosolv Pretreatment ◽  
Dependent Parameter ◽  
Pretreatment Temperature ◽  
Pretreatment Conditions ◽  
Main Components ◽  
The Relationship

Due to the invalidity of traditional models, pretreatment conditions dependent parameter of susceptible dissolution degree of xylan (dX) was introduced into the kinetic models. After the introduction of dX, the dissolution of xylan, and the formation of xylo-oligosaccharides and xylose during ethanol based auto-catalyzed organosolv (EACO) pretreatments of bamboo were well predicted by the pseudo first-order kinetic models (R2 > 97%). The parameter of dX was verified to be a variable dependent of EACO pretreatment conditions (such as solvent content in pretreatment liquor and pretreatment temperature). Based on the established kinetic models of xylan dissolution, the dissolution of glucan and the formation of degradation products (furfural and acetic acid) could also be empirically modeled (R2 > 97%). In addition, the relationship between xylan and lignin removal can provide guidance for alleviating the depositions of lignin or pseudo-lignin. The parameter of dX derived novel kinetic models can not only be used to reveal the multi-step reaction mechanisms of xylan, but also control the final removal of main components in bamboo during EACO pretreatments, indicating scientific and practical significance for governing the biorefinery of woody biomass.

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