scholarly journals Field Measurement Analysis and Control Measures Evaluation of Metro Vehicle Noise Caused by Rail Corrugation

2021 ◽  
Vol 11 (23) ◽  
pp. 11190
Author(s):  
Hua Peng ◽  
Yufei Yao ◽  
Xiaopei Cai ◽  
Yanglong Zhong ◽  
Tianchi Sun
Keyword(s):  
Interior Noise ◽  
Control Measures ◽  
Test Results ◽  
Maximum Increase ◽  
Vehicle Noise ◽  
Rail Corrugation ◽  
Measurement Analysis ◽  
And Control ◽  
Clear Increase

The noise caused by rail corrugation seriously affects the operation quality of metro vehicles. In this work, the rail corrugation, interior noise and wheel–rail noise of a metro line were tested, and the test results were compared with those after two kinds of treatments. The results show that rail corrugation is the main cause of the abnormal interior noise. The interior noise in many sections exceeds the limit, where clear rail corrugations from 31.5~63 mm are found. When the train passes through the rail corrugation section, the interior noise shows a clear increase, and the maximum increase is higher than 25 dB(A). After increasing the lateral stiffness of the track and rail grinding, the interior noise is reduced by 11.4 dB(A). After a long renovation time, the interior noise is effectively equal to that when the renovation was completed. The research results of this work can provide a reference for rail corrugation treatment and noise control.

Relationships among quality of life, severity, and control measures in asthma: An evaluation using factor analysis

2005 ◽  
Vol 115 (5) ◽  
pp. 1049-1055 ◽  
Author(s):  
M SCHATZ ◽  
D MOSEN ◽  
A APTER ◽  
R ZEIGER ◽  
W VOLLMER ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Factor Analysis ◽  
Control Measures ◽  
And Control

scholarly journals RESEARCH APPROACHES TO MONETARY FLOW OPTIMIZATION SUBJECT TO SELECTED FACTORS AND CONTROL MEASURES REDUCING THE RISK OF BANKRUPTCY OF THE ORGANIZATION

2017 ◽  
pp. 109-119
Author(s):  
Lyudmila Ivanovna Fedorova ◽  
Svetlana Vyacheslavovna Dzhezheliy
Keyword(s):  
Cash Flow ◽  
Cash Flows ◽  
Control Measures ◽  
Managerial Decision ◽  
Flow Management ◽  
Managerial Decision Making ◽  
Cash Flow Management ◽  
Rational Management ◽  
And Control

In modern conditions the competitiveness of organizations is provided by rational management decisions, which are taken depending on various factors and their impact on the cash flows of the organization. The theme of the study of factors and control measures influencing cash flow management for reducing the risk of bankruptcy is in all respects one of the most controversial and much cited. In the course of study the authors have summarized the approaches of Russian and foreign authors towards the concept "cash flow", revealed certain problems in the quality of decisions, arranged the factors increasing the degree of their effectiveness and directly affecting the financial performance of the organization. Application in the work of the organization of individual elements ("morale") of the group of environmental factors and standards of internal reporting will improve the efficiency of managerial decision-making in part of cash flows from different activities.

scholarly journals Analysis of Budget and Cost Control of New Green Building Projects

2018 ◽  
Vol 2 (4) ◽  
Author(s):  
Jing Liu ◽  
Pengfei Wang ◽  
Tao Li ◽  
Guiquan Ma
Keyword(s):  
Cost Control ◽  
Public Awareness ◽  
Green Building ◽  
Control Measures ◽  
Environment Protection ◽  
Building Projects ◽  
The Cost ◽  
And Control ◽  
Building Engineering

With the increment of public awareness towards ecological environment protection, green building has gradually become an integral part of construction development. Green building refers to a form of architecture that conforms to the current social development form and meets the requisites of energy conservation and environmental protection. The budget and cost control of green building construction project play very important roles in improving the quality of the construction and reducing the cost of the project. This paper mainly analyzes the problems and control measures in the new green building engineering budget and cost control.

Dairy Safety Prediction Based on Machine Learning Combined with Chemicals

2020 ◽  
Vol 16 (5) ◽  
pp. 664-676
Author(s):  
Jiahui Chen ◽  
Guangya Zhou ◽  
Jiayang Xie ◽  
Minjia Wang ◽  
Yanting Ding ◽  
...  
Keyword(s):  
Machine Learning ◽  
Prediction Model ◽  
Dairy Products ◽  
Control Measures ◽  
Classification Model ◽  
Sampling Inspection ◽  
Prevention And Control Measures ◽  
Common Items ◽  
And Control

Background: Dairy safety has caused widespread concern in society. Unsafe dairy products have threatened people's health and lives. In order to improve the safety of dairy products and effectively prevent the occurrence of dairy insecurity, countries have established different prevention and control measures and safety warnings. Objective: The purpose of this study is to establish a dairy safety prediction model based on machine learning to determine whether the dairy products are qualified. Methods: The 34 common items in the dairy sampling inspection were used as features in this study. Feature selection was performed on the data to obtain a better subset of features, and different algorithms were applied to construct the classification model. Results: The results show that the prediction model constructed by using a subset of features including “total plate”, “water” and “nitrate” is superior. The SN, SP and ACC of the model were 62.50%, 91.67% and 72.22%, respectively. It was found that the accuracy of the model established by the integrated algorithm is higher than that by the non-integrated algorithm. Conclusion: This study provides a new method for assessing dairy safety. It helps to improve the quality of dairy products, ensure the safety of dairy products, and reduce the risk of dairy safety.

PENGARUH MODEL PEMBELAJARAN SIKLUS TERHADAP KEMAMPUAN APRESIASI PUISI DI KELAS VII SMP NEGERI 2 INDRAMAYU TAHUN PELAJARAN 2013/2014

2017 ◽  
Vol 4 (1) ◽  
pp. 653
Author(s):  
Dede Endang Mascita ◽  
Iyay Robia Khoerudin ◽  
Johar Maknun
Keyword(s):  
Image Understanding ◽  
Learning Model ◽  
Learning Objectives ◽  
Test Results ◽  
Effective Learning ◽  
Quality Of Teaching ◽  
Teachers And Students ◽  
Post Test ◽  
And Control

This study focused on teaching model cycle capability poetry appreciation. This study aimed to describe the process of learning by using learning model cycle. Describe the activity of students in the learning cycle to learning poetry appreciation by applying the 5 stages: (a) generating interest (enggament), (b) exploration ( Exploration), (c) an explanation (explanation), (d) elaboration (elaboration), and evaluation (evaluation), and determine the effect on the ability of learning model cycle appreciation of poetry.Based on the results of this study concluded 1) The process of learning poetry appreciation by applying the learning model cycle can improve student learning outcomes. 2) Activity of students in learning poetry appreciation by using the model of the cycle of learning can help students actively learn independently in groups , solve the problem of learning. Applying learning model cycle can assist students in learning menningkatkan understanding. 3) learning model cycle affect the ability of appreciation of poetry and effective against the appreciation of poetry. Applying learning model cycle is expected to help teachers and students to improve the quality of teaching so that learning objectives can be achieved the expected goals.The data in this study of student understanding of the appreciation of poetry that includes elements that build the poem with assessment criteria include a general overview of the contents of understanding aspects of poetry, pemhaman tone, understanding feeling / sense, image understanding, understanding the style of language, understanding the message, understanding the content of the poem in life.To test the hypothesis based on the assumption that different test results obtained from the initial ability appreciation of poetry and learning achievement as indicated by the value of pretest and post-test that includes testing the experimental classes and control classes.Based on the analysis there are differences in pretest and post-test results of the experimental class, which is the result of the analysis, sig ( 2 - tailed ) < 0.05, then Ho is rejected and Hi which is the research hypothesis is accepted that effective learning model cycle of the ability of appreciation of poetry.Applying learning model cycle is expected to help teachers and students to improve the quality of teaching so that learning objectives can be achieved.

scholarly journals Analyzing the country events registration of the ?safe community project using E & CFA technique: Case study of Esfahan Province

2015 ◽  
Vol 16 (SE) ◽  
pp. 461-476
Author(s):  
Hamzeh Zarei ◽  
Saeed Givehchi ◽  
Mahanaz Nasrabadi
Keyword(s):  
Safety Culture ◽  
Control Measures ◽  
Test Results ◽  
Statistical Population ◽  
Root Cause ◽  
Community Project ◽  
Statistical Sample ◽  
And Control ◽  
Safe Community

The present study aims to analyze the events of the ?safe community project of Esfahan using E & CFA technique. Safe community project includes the initial preparations for the establishment of a safety culture in societies and providing purposeful management solutions to prevent the occurrence of various events. With the aggregate of the statistics on a variety of accidents with clear definitions, a good statistical population to be examined and analyzed is created. The statistical sample in this study consists of all the victims of the events recorded in the software relating to the state ?safe community project and in the section about the investigation of accidents by questionnaire, technical experts in the staff units of Health Center No. 1 in Esfahan analyzed the two selected events in the form of responding to components associated with intermediate and root causes and provided preventive and control measures. The instruments applied in this research included a questionnaire on the analysis of intermediate and root causes and a questionnaire concerning the assessment of preventive and control measures. Also, the degree of importance of each component and its relationship with other components were evaluated using Kruskal-Wallis test and then, the intended components were ranked. Further, brainstorming sessions were held with the presence of 5 technical experts and 5-why tool and Ishikawa root cause diagram were used as a tool for investigating causal relationships in the two selected events. The test results indicated that each component in the questionnaire is not associated with other components and can be effective alone in creating the desired effect.

scholarly journals FINANCIAL SECURITY AND ECONOMIC DEVELOPMENT: METHODS OF ANALYSIS AND RISK MANAGEMENT (THE CASE OF RUSSIA)

2018 ◽  
pp. 68-80
Author(s):  
Natalia Kazakova ◽  
Anna Sivkova
Keyword(s):  
Risk Management ◽  
Control Process ◽  
Control Measures ◽  
General Level ◽  
Financial Security ◽  
Corporate Fraud ◽  
Quality Of Control ◽  
And Control ◽  
Development Methods

Under the conditions of today’s megarisks, the general level of instability of the world economy is only rising, the number of unprofitable organizations with overdue debts increases, and this creates additional threats to financial security of the states. In this regard, the presented research results have scientific and applied importance for risk management of financial security of economic entities on the basis of the suggested control and analytical concept. The suggested concept includes; monitoring, diagnostics, prevention of crisis situations, including bankruptcy, corporate fraud or financial irregularities in the economy. Accounting for the specifics of economic entities in the analysis, diagnostics and control of their activities is aimed at developing an effective management system for corporate fraud and bankruptcy prevention. The conceptual principles of information and analytical support, improved methods used in analyzing, evaluating and monitoring financial security contribute to the development of this methodology for economic analysis and control, ensuring their effectiveness and transparency. The comprehensive toolkit offered here for diagnosing financial security allows identifying the areas of increased bankruptcy risks, fraudulent actions or ineffective business management; unify the control process, thereby reducing labor intensity and improving the quality of control measures.

Rail Roughness Acceptance Criterion Based on Interior Noise

2021 ◽  
Author(s):  
Xiaolong LIU ◽  
Jian HAN ◽  
Moukai LIU ◽  
Jianuo WANG ◽  
Xinbiao XIAO ◽  
...  
Keyword(s):  
Simulation Method ◽  
Interior Noise ◽  
Acceptance Criteria ◽  
Acoustic Environment ◽  
Vehicle Noise ◽  
Acceptance Criterion ◽  
Rail Corrugation ◽  
Metro Systems ◽  
Roughness Control ◽  
The Relationship

Abstract Severe rail roughness leads to a series of problems in metro systems, particularly the vehicle noise problem. To ensure a better acoustic environment, rail roughness control is therefore one of the main concerns for the metro operators. But the existing roughness acceptance criteria are not suitable for metro interior noise control. It is an appropriate method to determine the rail roughness limit based on interior noise. A rail roughness acceptance criterion based on metro interior noise is accordingly proposed in this paper. The relationship between rail roughness and interior noise can be derived with wheel–rail noise as link. With this objective, a combined test and simulation method is adopted. A validated wheel–rail noise prediction model is thus established to determine the relationship between rail roughness and wheel–rail noise. Moreover, the transfer function of wheel–rail noise to interior noise is developed based on extensive field test. Using this method, the noise sensitivity to roughness wavelength and acceptance criteria at different speeds and track structures are investigated. Finally, an eclectic rail corrugation acceptance criterion on curved track is suggested in consideration of practical application.

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