scholarly journals Optimize Design of Run-Flat Tires by Simulation and Experimental Research

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 474
Author(s):  
Huaqiao Liu ◽  
Yiren Pan ◽  
Huiguang Bian ◽  
Chuansheng Wang
Keyword(s):  
Stress Distribution ◽  
Energy Loss ◽  
Successful Implementation ◽  
Performance Tests ◽  
Key Factors ◽  
Heat Accumulation ◽  
Factors Affecting ◽  
Structural Rigidity ◽  
Key Factor ◽  
Durability Testing

In this study, the two key factors affecting the thermal performance of the insert rubber and stress distribution on the tire sidewall were analyzed extensively through various performance tests and simulations to promote the development of run-flat tires. Four compounds and two structures of insert rubber were designed to investigate the effects of heat accumulation and stress distribution on durability testing at zero pressure. It was concluded that the rigidity and tensile strength of the compound were negatively correlated with temperature. The deformation was a key factor that affects energy loss, which could not be judged solely by the loss factor. The stress distribution, however, should be considered in order to avoid early damage of the tire caused by stress concentration. On the whole, the careful balance of mechanical strength, energy loss, and structural rigidity was the key to the optimal development of run-flat tires. More importantly, the successful implementation of the simulations in the study provided important and useful guidance for run-flat tire development.

Interactive Agencies and Digitalization Readiness

2017 ◽  
Vol 8 (4) ◽  
pp. 48-64
Author(s):  
Leila Behboudi
Keyword(s):  
Organizational Culture ◽  
The Body ◽  
Critical Factors ◽  
Key Factors ◽  
Technology Infrastructure ◽  
Factors Affecting ◽  
Global Trend ◽  
Key Factor ◽  
Financial Infrastructure ◽  
Management Participation

This study presents primarily factors affecting interactive agencies in Iran. There is a kind of unwillingness among Iranian ad agencies to execute online ad campaign in compare to the global trend and the advantage of use of online ad makes it imperative to find the key factors affecting interactive agencies behavior. Accordingly, the body of literature was analyzed and eight critical factors including “Management participation,” “Organizational culture,” “Size of the organization,” “The level of organization technology,” “Communication infrastructure,” “Financial infrastructure,” “Technology infrastructure” and “Electronic readiness,” were extracted. The expert questionnaire was designed to validate the gathered factors. By analyzing 294 questionnaires, the type of management was found as key factor in adopting online ad campaign execution.

scholarly journals Research on Key Factors Affecting Power Supply and Demand Trend Based on Complex Correlation

2020 ◽  
Vol 165 ◽  
pp. 06022
Author(s):  
Dunnan Liu ◽  
Rui Ge ◽  
Pengfei Li ◽  
Hua Li ◽  
Shanzhe Shi ◽  
...  
Keyword(s):  
Supply And Demand ◽  
Two Dimensions ◽  
Key Factors ◽  
Factors Affecting ◽  
Market Participants ◽  
Key Factor ◽  
Complex Correlation ◽  
Rule Analysis ◽  
The Impact ◽  
Big Data Technology

The market behaviors of the supply and demand sides in the power market are the issues that market participants, operators and regulators are most concerned about. This article starts from the two dimensions of power generation market behavior and demand market behaviour, analyzes the impact of power transaction behavior on supply and demand trend changes, and then studies the function of big data technology in correlation analysis. The qualitative data is converted into quantitative data, and then gray rule analysis and correlation coefficient analysis are used to mine association rules. The results show that demand response is the key factor that affects the change of load trend.

scholarly journals Exploring Approaches How to Measure a Lean Process

Organizacija ◽  
2014 ◽  
Vol 47 (3) ◽  
pp. 132-142
Author(s):  
Christer Österman ◽  
Anders Fundin
Keyword(s):  
Evaluation Method ◽  
Practical Method ◽  
General Level ◽  
Successful Implementation ◽  
Group Level ◽  
Manufacturing Companies ◽  
Key Factors ◽  
Factors Affecting ◽  
Multiple Case ◽  
Definition Of

AbstractPurpose:The purpose of the research is to explore a practical method of measuring the implementation of lean in a process. The method will be based on examining the abilities of a group. At this scale the ability to work standardized and solve problems is important. These two abilities are dependent of each other and are fundamental for the group's ability to create a stable result. In this context the method of standardized work (SW) is define to be the methods used in a process to generate stable results. Problem solving (PS) is defined as the methods used to return a process to a condition where SW is possible.Methodology /approach: The research is conducted in a multiple case study in four large global manufacturing companies. The order of the data collection is: Firstly, interviews with the individuals that are centrally responsible for overall implementation of lean in the organization. Secondly, observe the implementation of SW and PS at the group level. In total 7 groups have been studied and 19 respondents interviewed.Findings: Results show that the central definition of the methods for standardized work does not by itself have a direct impact on success of implementation of SW at group level. The method of SW where similar on a general level in the different cases, but with varying levels of implementation at group level was applied. Results also show that key factors for a successful implementation of standardized work on group level are: Ownership of the process, Direct connection to result of process, Correct workload and Leader demand. Methods of PS at group level where dissimilar despite a superficially similar approach. The evaluation method used was successful in providing comparable results between the cases.Research limitations: A limitation of this research is within the scale of the measurement, as it only examines the group level. The research is further limited to four companies and seven groups.Originality/value of paper: This paper aims to fill a gap in the established measurement methods of lean, as it examines the abilities of SW and PS at the group level of a process. These abilities are often referred to as essential in lean theory. However, there has been little scholarly work in defining the methods of SW and PS or the key factors affecting the methods at an operational level.

Mechanisms of polymer retention in porous media

2020 ◽  
pp. 126-134
Author(s):  
E.F. Veliyev ◽  
Keyword(s):  
Porous Medium ◽  
Porous Media ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Field Research ◽  
Polymer Flooding ◽  
Successful Implementation ◽  
Key Factors ◽  
Factors Affecting ◽  
Polymer Retention

Polymer flooding is one of the main enhanced oil recovery methods that have been actively used since the late 1960s. However, despite the significant gained experience of both laboratory and field research, this technology still continues to develop from year to year, revealing more and more new factors and challenges that are necessary aspects for successful implementation. Estimation of retained polymer amount by the porous medium is one of the key factors. The article discusses the main mechanisms and factors affecting retention process, as well as methods for determining the amount of retained polymer when flooding the solution through porous medium in laboratory conditions.

Study on Selective Depression of Pyrite during Copper Bioleaching

2007 ◽  
Vol 20-21 ◽  
pp. 172-173 ◽  
Author(s):  
Ren Man Ruan ◽  
Gui Ying Zhou ◽  
Jian Kang Wen
Keyword(s):  
Redox Potential ◽  
Culture Medium ◽  
Influencing Factor ◽  
Size Fraction ◽  
Key Factors ◽  
Factors Affecting ◽  
Factors Influencing ◽  
Key Factor ◽  
Initial Ph ◽  
Leaching Efficiency

During Zijinshan copper heap bioleaching, pyrite was leached in plenty resulting in high ferric concentration in solution. This affected bioleaching and extraction processing greatly. The paper studied the factors influencing in the course of leaching of pyrite and a mixture of chalcocite and pyrite respectively. It focuses on the effect of the redox potential for copper bioleaching so as to find key factors affecting the dissolution difference between chalcocite and pyrite. The experiment results showed that redox potential is an important influencing factor in bioleaching. Copper and pyrite extents of the leaching process were 95% and 11% respectively and there is great dissolution difference between them at redox potential 700 mV (SHE). It is indicated that copper can be selectively bioleached by controlling redox potential of bioleaching. The conclusion will provide theoretic foundation on balance of acid and iron during bioleaching for copper of higher S/Cu ratio. A simple sulfide, pyrite and chalcocite, were selected as test minerals. The samples were obtained from rich mineral in Zijin Mine. The concentrated samples were milled to obtain the size fraction of 320 mesh percent of 90. Bacterium culture: 9K culture medium contained the following composition in kg/m3 distilled water: (NH4)2SO4, 3.0; K2HPO4·3H2O, 0.5; KCl, 0.1; MgSO4·7H2O, 0.5; Ca(NO3)2·2H2O, 0.01. The initial ferrous concentration was 9.0g/L, the initial pH was adjusted to 1.6, and the temperature set at 30°C. The rotation speed of shaking bed was 150r/min. A three-day-old inoculum previously grown in medium was used in bioleaching process. A 5% inoculum was added to give an initial bacteria concentration in the medium was (3-6)×107 cells/m3. The experiments investigated factors influencing bioleaching including ferrous concentration and redox potential during bioleaching. The extent Cu leached was over 90%. Cu leached velocity increased as redox potential turned higher. Cu leached velocity rapid increased at redox potential 700mV. During chalcocite and pyrite bioleaching, redox potential is important factor to influence of bioleaching rate and the results showed that pyrite and chalcocite bioleaching rate was correlated with redox potential. It is indicated that copper can be selectively bioleached during copper bioleaching by controlling redox potential of bioleaching. It can be concluded that: (1) Pyrite and chalcocite bioleaching rate was correlated with redox potential. Redox potential was shown to be the key factor affecting the dissolution difference between chalcocite and pyrite. (2) Chalcocite and pyrite leaching efficiency were 95% and 11% respectively and there is great dissolution difference between them at redox potential 700 mV (SHE). (3) It is indicated that copper can be selectively bioleached during copper bioleaching by controlling redox potential of bioleaching.

Factors Affecting the Validity of Strategic 360 Feedback Processes

2019 ◽  
pp. 237-254
Author(s):  
John W. Fleenor
Keyword(s):  
Successful Implementation ◽  
Key Factors ◽  
Design Features ◽  
Factors Affecting ◽  
360 Feedback ◽  
Over Time

How do we know if a 360 process has been implemented successfully? What are the factors that influence its success? How can these factors be controlled by those responsible for its implementation? In this chapter, key factors are organized identified according to whether they exert their influence proximally or distally. This chapter explores how each of these factors contributes to successful implementation. After identifying how design features of a 360 process affect these key factors, recommendations are made on how to enhance the probability of implementing 360 Feedback successfully and sustaining the process over time, thus enhancing the validity of the process.

scholarly journals Causes of delay in construction projects: The case of oil and gas projects

2018 ◽  
Vol 4 (1) ◽  
pp. 11 ◽  
Author(s):  
Aliyeh Kazemi ◽  
Ali Katebi ◽  
Mohammad-Hossein Kazemi
Keyword(s):  
Economic Development ◽  
Construction Projects ◽  
Major Part ◽  
Oil And Gas ◽  
The Other ◽  
Successful Implementation ◽  
Key Factors ◽  
Change Orders ◽  
Factors Affecting ◽  
Causes Of Delays

Successful implementation of construction projects is one of the key factors for economic development of every country. Every year, a major part of the countries’ capital is allocated to civil and infrastructure projects, most of which are implemented with delay. Construction projects are often criticized for overrunning time and budgets. Analyzing the factors causing delay is essential with the aim of omitting them and timely implementation of these projects. Research to identify the reasons and causes of delays have been conducted in different countries and by various researches. In this paper, various research has studied different factors affecting construction projects delays have been studied. These factors have been identified in four groups consisted of owner, consultant, conductor, and other factors. Moreover, on account of the importance of oil and gas projects, the mentioned factors for these kinds of projects are taken into consideration. The results showed that change orders and changes in scope of work by owner, delay in reviewing of documents by consultant, inadequate experience and knowledge and errors during construction by contractor, and low productivity of laborer have been indicated as key factors comparing with the other as crucial factors causing delay in the oil and gas construction projects.

EVALUATION OF FINANCIAL SECURITY OF THE REPUBLIC OF CRIMEA

2020 ◽  
pp. 56-67
Author(s):  
Elena Evgenevna Mashyanova ◽  
Elena Aleksandrovna Smirnova
Keyword(s):  
Financial Markets ◽  
Negative Impact ◽  
Gradual Increase ◽  
Financial System ◽  
Financial Security ◽  
Key Factors ◽  
Factors Affecting ◽  
External Threats ◽  
The Republic ◽  
Global Financial System

In modern conditions of development, financial security is an integral part of the overall security of the region and is formed on the basis of the functioning of the financial system. The complication of relationships between key segments of international financial markets, as well as the limited ability to accurately predict future trends in the development of the global financial system, lead to a gradual increase in the risks that accompany the activities of economic entities, and an increase in the number and scale of internal and external threats that have a negative impact on the financial security of the state. This formulation of the issue requires generalization of approaches to determining the financial security of the region in order to further formalize this issue and determine the key factors affecting it. The article considers the types of financial security, as well as certain areas of ensuring the financial security of the region and their priority. In work the assessment of the level of socio-economic development of the region with a view to ensuring financial security on the basis of which offers the main activities and priority areas of implementation of the investment policy that will ensure financial security of the Republic of Crimea.

Sign in / Sign up

Export Citation Format

Share Document