Correlation Degree Model of Urban Signalized Intersection Group Based on Turning Flows

2014 ◽  
Vol 641-642 ◽  
pp. 839-847
Author(s):  
Qian Zhang ◽  
Xiu Cheng Guo ◽  
Hao Liang
Keyword(s):  
Correlation Model ◽  
Key Factors ◽  
Contributing Factors ◽  
Signal Coordination ◽  
Road Section ◽  
Proposed Model ◽  
Correlation Degree ◽  
Spatial And Temporal Heterogeneity ◽  
Relationship Of

This article analyzes the limitations of calculating correlation degree based on road sections and built correlation model based on the turning flow of the intersection. In addition to the traditional contributing factors, the model considers two other key factors——turning proportion of intersections and signal phase. Therefore, the proposed model can reflect the spatial and temporal heterogeneity between each turning flows on a road section. A case study to four actual intersections is conducted to test the effectiveness of this model. The results show that the proposed correlation model can better descript the relationship of adjunct intersections and find the critical route for signal coordination.

scholarly journals Impact of Prioritization on the Outpatient Queuing System in the Emergency Department with Limited Medical Resources

Symmetry ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 796 ◽  
Author(s):  
Ao Zhang ◽  
Xiaomin Zhu ◽  
Qian Lu ◽  
Runtong Zhang
Keyword(s):  
Emergency Department ◽  
Emergency Services ◽  
Service System ◽  
Queuing System ◽  
Hospital Service ◽  
Key Factors ◽  
Queuing Model ◽  
Medical Resources ◽  
Proposed Model

The emergency department has an irreplaceable role in the hospital service system because of the characteristics of its emergency services. In this paper, a new patient queuing model with priority weight is proposed to optimize the management of emergency department services. Compared with classical queuing rules, the proposed model takes into consideration the key factors of service and the first-come-first-served queuing rule in emergency services. According to some related queuing indicators, the optimization of emergency services is discussed. Finally, a case study and some compared analysis are conducted to illustrate the practicability of the proposed model.

scholarly journals An Adaptive Model for Calculating the Correlation Degree of Multiple Adjacent Signalized Intersections

2013 ◽  
Vol 2013 ◽  
pp. 1-13 ◽  
Author(s):  
Linhong Wang ◽  
Yiming Bie
Keyword(s):  
Traffic Control ◽  
Real Life ◽  
Signalized Intersections ◽  
Relative Performance ◽  
Control Mode ◽  
Correlation Model ◽  
Contributing Factors ◽  
The Road ◽  
Correlation Degree ◽  
Multiple Intersections

As an important component of the urban adaptive traffic control system, subarea partition algorithm divides the road network into some small subareas and then determines the optimal signal control mode for each signalized intersection. Correlation model is the core of subarea partition algorithm because it can quantify the correlation degree of adjacent signalized intersections and decides whether these intersections can be grouped into one subarea. In most cases, there are more than two intersections in one subarea. However, current researches only focus on the correlation model for two adjacent intersections. The objective of this study is to develop a model which can calculate the correlation degree of multiple intersections adaptively. The cycle lengths, link lengths, number of intersections, and path flow between upstream and downstream coordinated phases were selected as the contributing factors of the correlation model. Their jointly impacts on the performance of the coordinated control mode relative to the isolated control mode were further studied using numerical experiments. The paper then proposed a correlation index (CI) as an alternative to relative performance. The relationship between CI and the four contributing factors was established in order to predict the correlation, which determined whether adjacent intersections could be partitioned into one subarea. A value of 0 was set as the threshold of CI. If CI was larger than 0, multiple intersections could be partitioned into one subarea; otherwise, they should be separated. Finally, case studies were conducted in a real-life signalized network to evaluate the performance of the model. The results show that the CI simulates the relative performance well and could be a reliable index for subarea partition.

scholarly journals Application of Bayesian Networks and Information Theory to Estimate the Occurrence of Mid-Air Collisions Based on Accident Precursors

Entropy ◽  
2018 ◽  
Vol 20 (12) ◽  
pp. 969 ◽  
Author(s):  
Rosa Arnaldo Valdés ◽  
Schon Liang Cheng ◽  
Victor Gómez Comendador ◽  
Francisco Sáez Nieto
Keyword(s):  
Information Theory ◽  
Bayesian Networks ◽  
Contributing Factors ◽  
Causal Factors ◽  
Severe Loss ◽  
Dependent Relationship ◽  
Relationship Of ◽  
Near Accidents

This paper combines Bayesian networks (BN) and information theory to model the likelihood of severe loss of separation (LOS) near accidents, which are considered mid-air collision (MAC) precursors. BN is used to analyze LOS contributing factors and the multi-dependent relationship of causal factors, while Information Theory is used to identify the LOS precursors that provide the most information. The combination of the two techniques allows us to use data on LOS causes and precursors to define warning scenarios that could forecast a major LOS with severity A or a near accident, and consequently the likelihood of a MAC. The methodology is illustrated with a case study that encompasses the analysis of LOS that have taken place within the Spanish airspace during a period of four years.

Mechanical Model Study of a Bolted Endplate Minor Axis Joint

2010 ◽  
Vol 163-167 ◽  
pp. 726-729
Author(s):  
Zhi Yu Wang ◽  
Qing Yuan Wang
Keyword(s):  
Mechanical Model ◽  
Plate Theory ◽  
Minor Axis ◽  
Model Study ◽  
Mathematical Expressions ◽  
Proposed Model ◽  
Special Concern ◽  
The Moment ◽  
Relationship Of

An analysis of a bolted endplate minor axis joint that is subjected to bending is presented in this paper. The methodology for predicting the moment-rotation relationship of such joint is based on the component method and appropriate mathematical expressions. The component of column web in bending is of special concern, by using yield line analysis and plate theory, for calculation of the resistance and the stiffness respectively. A case study is reported in this work to validate the proposed mechanical model. The result is found to be satisfactory for the prediction of moment-rotation relationship, and the validity of the proposed model is discussed.

scholarly journals Customer Satisfaction Assessment of E-Supply Chain Quality in Online Shopping: A Case Study

2020 ◽  
Author(s):  
Maryam Abdirad ◽  
Krishna Krishnan
Keyword(s):  
Supply Chain ◽  
Customer Satisfaction ◽  
Structural Equation ◽  
Online Shopping ◽  
Partial Least Square ◽  
Least Square ◽  
Equation Modeling ◽  
Key Factors ◽  
Proposed Model

The purpose of this study is to examine the influence of Services Quality (SQ) of E-Supply Chain (E-SC) on customer satisfaction (CS) in online shopping. After a comprehensive review of the literature, the key factors of E-SC, CS, and SQ identification were selected. Then, the proposed conceptual model was presented. To validate this model, the data was collected through a survey of 150 respondents to diagnose customers’ satisfaction including online customers of “Digikala” online websites in Iran. The model was examined based on the partial least square-structural (PLS). Sample data was analyzed using SPSS21 and PLS. The proposed model was validated using factor analysis and structural equation modeling techniques. The results indicated that E-supply chain management(E-SCM) has a direct impact on CS. The effect of SQ is also confirmed. There is a positive and significant relationship between E-SCM and CS, E-SCM and SQ, and also, SQ and CS (P> 0.05).

Factors Influencing Customer’s Retail Chain Store Brand Choice Intention: Empirical Study of Circle K Stores in Hanoi

2020 ◽  
Vol 36 (4) ◽  
Author(s):  
Nguyen Thu Ha ◽  
Nguyen Thi Thanh Huyen
Keyword(s):  
Brand Choice ◽  
Distribution Networks ◽  
Analytical Framework ◽  
Store Brand ◽  
Chain Store ◽  
Retail Chain ◽  
Five Elements ◽  
Relationship Of ◽  
The Relationship

The retail market in Vietnam continues to grow with the entry of foreign retail brands and the strong rise of domestic businesses in expanding distribution networks and conquering consumer confidence. The appearance of more retail brands has created a fiercely competitive market. Based on the outcomes of previous research results on brand choice intention combined with a customer survey, the paper proposes an analytical framework and scales to examine the relationship of five elements including store image, price perception, risk perception, brand attitudes, brand awareness and retail brand choice intention with a case study of the Hanoi-based Circle K convenience store chain. These five elements are the precondition for retail businesses to develop their brands so as to attract customers.

Actor Relations in Interregional Cooperation Policy Dynamics Case Study: The Banjar Bakula Metropolitan Area Development Program in South Kalimantan Province

2018 ◽  
Vol 2 (2) ◽  
pp. 115
Author(s):  
Taufik Abrain
Keyword(s):  
Regional Cooperation ◽  
Development Program ◽  
Policy Dynamics ◽  
Interregional Cooperation ◽  
Object Of Study ◽  
Relationship Of ◽  
The Relationship ◽  
Area Development ◽  
Cooperation Policy

Several studies have shown that the success of interregional cooperation may be influenced by coordination, commitment, participation, variance of cooperation, structure, format of cooperation, and political will. Nevertheless, these factors do not stand alone since actor relations as a determining aspect is capable of driving those factors effectively. This article aims to examine the aspect of actor relations as a contributing factor that determines successful cooperation among regions. This is a qualitative research with the policy of inter-regional cooperation of the Banjarbakula Program, South Kalimantan Province from February 2017 to February 2018, set as its object of study. The result of this study states that the success of inter-regional cooperation is influenced by the relationship of actors in development factors as suggested by previous experts. The actors involved in the inter-regional cooperation examined in this case had become triggers of coordination, commitment, and participation toward success and failure, as well as the effectiveness of regional cooperation policy. Structural obstacles, ego-centric character, minimum budget availability, and non-visionary planning could be overcome as long as actor relations were properly managed.

Considerations for EHR section for the surgical specialist: Insights from a case study

2018 ◽  
pp. 1-2
Keyword(s):  
Electronic Health Records ◽  
Private Practice ◽  
Patient Relationship ◽  
Key Factors ◽  
Health Records ◽  
Start Up ◽  
Insurance Payment ◽  
System Selection ◽  
Office Procedures

Context: Surgical specialists have unique considerations when selecting and using electronic health records (EHRs). Aim: We sought to identify key factors and considerations during system selection and implementation for the surgical subspecialist. Case study: Insights from system selection and implementation for a start-up plastic surgery private practice were used to inform a broader set of principles for surgical subspecialists in private practice selecting and using EHRs. What can be learned: The nature of the provider-patient relationship is episodic and such as maintaining inventory, managing images, annotating images, documenting and billing in-office procedures, and integration of cash-based and insurance payment. Conclusion: Surgeons in private practice and as part of larger institutions can use insights from this case study to inform their own efforts in system selection and optimization for ongoing use.

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