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Deep Reinforcement Learning for Addressing Disruptions in Traffic Light Control

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Computers, Materials & Continua 2022年第5期71卷 2225-2247页

作者： Faizan Rasheed Kok-Lim Alvin Yau rafidah md Noor Yung-Wey Chong School of Engineering and Computer Science University of HertfordshireHatfieldAL109ABUK Department of Computing and Information Systems Sunway UniversitySubang Jaya47500Malaysia Faculty of Computer Science and Information Technology University of MalayaKuala Lumpur50603Malaysia National Advanced IPv6 Centre Universiti Sains MalaysiaUSMPenang11800Malaysia

This paper investigates the use of multi-agent deep Q-network(MADQN)to address the curse of dimensionality issue occurred in the traditional multi-agent reinforcement learning(MARL)*** proposed MADQN is applied to traffic light controllers at multiple intersections with busy traffic and traffic disruptions,particularly *** is based on deep Q-network(DQN),which is an integration of the traditional reinforcement learning(RL)and the newly emerging deep learning(DL)*** enables traffic light controllers to learn,exchange knowledge with neighboring agents,and select optimal joint actions in a collaborative manner.A case study based on a real traffic network is conducted as part of a sustainable urban city project in the Sunway City of Kuala Lumpur in *** is also performed using a grid traffic network(GTN)to understand that the proposed scheme is effective in a traditional traffic *** proposed scheme is evaluated using two simulation tools,namely Matlab and Simulation of Urban Mobility(SUMO).Our proposed scheme has shown that the cumulative delay of vehicles can be reduced by up to 30%in the simulations.

关键词： Artificial intelligence traffic light control traffic disruptions multi-agent deep Q-network deep reinforcement learning

Adaptive green traffic signal controlling using vehicular communication

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Frontiers of Information Technology & Electronic Engineering 2017年第3期18卷 373-393页

作者： Erfan SHAGHAGHI Mohammad Reza JABBARPOUR rafidah md NOOR Hwasoo YEO Jason J.JUNG Department of Computer Systems and Technology University of Malaya Department of Computer Engineering Islamic Azad UniversityNorth Tehran Branch Department of Civil and Environmental Engineering Korea Advanced Institute of Science and Technology Department of Computer Engineering Chung-Ang University

The importance of using adaptive traffic signal control for figuring out the unpredictable traffic congestion in today's metropolitan life cannot be overemphasized. The vehicular ad hoc network(VANET), as an integral component of intelligent transportation systems(ITSs), is a new potent technology that has recently gained the attention of academics to replace traditional instruments for providing information for adaptive traffic signal controlling systems(TSCSs). Meanwhile, the suggestions of VANET-based TSCS approaches have some weaknesses:(1) imperfect compatibility of signal timing algorithms with the obtained VANET-based data types, and(2) inefficient process of gathering and transmitting vehicle density information from the perspective of network quality of service(Qo S). This paper proposes an approach that reduces the aforementioned problems and improves the performance of TSCS by decreasing the vehicle waiting time, and subsequently their pollutant emissions at intersections. To achieve these goals, a combination of vehicle-to-vehicle(V2V) and vehicle-to-infrastructure(V2I) communications is used. The V2 V communication scheme incorporates the procedure of density calculation of vehicles in clusters, and V2 I communication is employed to transfer the computed density information and prioritized movements information to the road side traffic controller. The main traffic input for applying traffic assessment in this approach is the queue length of vehicle clusters at the intersections. The proposed approach is compared with one of the popular VANET-based related approaches called MC-DRIVE in addition to the traditional simple adaptive TSCS that uses the Webster method. The evaluation results show the superiority of the proposed approach based on both traffic and network Qo S criteria.

关键词： Vehicular ad hoc network(VANET) Intelligent transportation systems(ITSs) Clustering Adaptive traffic signal control Traffic controller Fuel consumption

Unicast routing protocols for urban vehicular networks:review, taxonomy, and open research issues

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Journal of Zhejiang University-Science C(Computers and Electronics) 2014年第7期15卷 489-513页

作者： Syed Adeel Ali SHAH Muhammad SHIRAZ Mostofa Kamal NASIR rafidah Binti md NOOR Mobile Ad Hoc Technology Lab Faculty of Computer Science and Information TechnologyUniversity of Malaya

Over the past few years, numerous traffic safety applications have been developed using vehicular ad hoc networks(VANETs). These applications represent public interest and require network-wide dissemination techniques. On the other hand, certain non-safety applications do not require network-wide dissemination *** applications can be characterized by their individual interest between two vehicles that are geographically apart. In the existing literature, several proposals of unicast protocols exist that can be used for these non-safety applications. Among the proposals, unicast protocols for city scenarios are considered to be most *** implies that in city scenarios unicast protocols show minimal persistence towards highly dynamic vehicular characteristics, including mobility, road structure, and physical environment. Unlike other studies, this review is motivated by the diversity of vehicular characteristics and difficulty of unicast protocol adaption in city *** review starts with the categorization of unicast protocols for city scenarios according to their requirement for a predefined unicast path. Then, properties of typical city roads are discussed, which helps to explore limitations in efficient unicast communication. Through an exhaustive literature review, we propose a thematic taxonomy based on different aspects of unicast protocol operation. It is followed by a review of selected unicast protocols for city scenarios that reveal their fundamental characteristics. Several significant parameters from the taxonomy are used to qualitatively compare the reviewed protocols. Qualitative comparison also includes critical investigation of distinct approaches taken by researchers in experimental protocol evaluation. As an outcome of this review, we point out open research issues in unicast routing.

关键词： Unicast protocols Taxonomy Protocol review Vehicular ad hoc networks Geographic routing

Guidelines from an expert panel for the management of diabetic macular edema in the Malaysian population

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International Journal of Ophthalmology(English edition) 2023年第5期16卷 712-720页

作者： Nor Fariza Ngah Nor Asiah Muhamad Shelina Oli Mohamed Roslin Azni Abdul Aziz Nur Hasnah Ma’amor Nor Azita Ahmad Tarmidzi Hanizasurana Hashim Hamisah Ishak Wan Norliza Wan Muda Rosiah Muda Azian Adnan rafidah md Saleh Wong Hon Seng Nurfahzura Mohd Jamil Tara Mary George Adrian Koh Institute for Clinical Research National Institutes of HealthMinistry of HealthSelangor 40170Malaysia Department of Ophthalmology Shah Alam HospitalMinistry of HealthSelangor 40000Malaysia Sector for Evidence-based Healthcare National Institutes of HealthMinistry of HealthSelangor 40170Malaysia Department of Ophthalmology Kuala Lumpur HospitalMinistry of HealthFederal Territory 50586Malaysia Department of Ophthalmology Selayang HospitalMinistry of HealthSelangor 61800Malaysia Department of Ophthalmology Tengku Ampuan Afzan HospitalMinistry of HealthPahang 25100Malaysia Department of Ophthalmology Sultanah Nur Zahirah HospitalMinistry of HealthKuala Terengganu 20400Malaysia KPJ Selangor Specialist Hospital Selangor 40300Malaysia Sultan Abdul Aziz Shah Hospital Selangor 43400Malaysia Gleneagles Kuala Lumpur Federal Territory 50450Malaysia Department of Ophthalmology Sungai Buloh HospitalMinistry of HealthSelangor 47000Malaysia Sunway Medical Centre Selangor 47500Malaysia Camden Medical Centre Singapore 248649Singapore

AIM:To derive a Malaysia guideline and consensus as part of the Malaysia Retina Group's efforts for diagnosis,treatment,and best practices of diabetic macular edema(DME).The experts'panel suggests that the treatment algorithm to be divided into groups according to involvement the central *** purpose of DME therapy is to improve edema and achieve the best visual results with the least amount of treatment ***:On two different occasions,a panel of 14 retinal specialists from Malaysia,together with an external expert,responded to a questionnaire on management of DME.A consensus was sought by voting after compiling,analyzing and discussion on first-phase replies on the round table discussion.A recommendation was deemed to have attained consensus when 12 out of the 14 panellists(85%)agreed with ***:The terms target response,adequate response,nonresponse,and inadequate response were developed when the DME patients'treatment responses were first *** panelists reached agreement on a number of DME treatment-related issues,including the need to classify patients prior to treatment,firstline treatment options,the right time to switch between treatment modalities,and side effects associated with *** this agreement,recommendations were derived and a treatment algorithm was ***:A detail and comprehensive treatment algorithm by Malaysia Retina Group for the Malaysian population provides guidance for treatment allocation of patients with DME.

关键词： diabetic macular edema guidelines consensus diabetic retinopathy Malaysia

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一种高效的异构车辆集群协同框架（英文）

Frontiers of Information Technology & Electronic Engineering 2021年第9期22卷 1247-1260页

作者： Iftikhar AHMAD rafidah md NOOR Zaheed AHMED Umm-e-HABIBA Naveed AKRAM Fausto Pedro GARCíA MáRQUEZ 米尔布尔科技大学计算机科学与信息技术学院马来亚大学计算机科学与信息技术系科特利大学软件工程学院 4. 米尔布尔科技大学机械工程学院马来亚大学机械工程学院机械工程系卡斯蒂利亚拉曼查大学Ingenium研究组

异构车辆集群集成了多种类型通信网络,可在各种车辆应用中高效运行。长期演进(LTE)和专用短程通信的集成是异构网络的一种普遍形式。这种网络基础设施的异构性和成本/数据共享的不合作性是需要解决的潜在问题。车辆集群框架是解决这些... 详细信息

异构车辆集群集成了多种类型通信网络,可在各种车辆应用中高效运行。长期演进(LTE)和专用短程通信的集成是异构网络的一种普遍形式。这种网络基础设施的异构性和成本/数据共享的不合作性是需要解决的潜在问题。车辆集群框架是解决这些问题的一种方案,但是该框架在部署到现实世界前应经过形式验证。为解决这些问题,提出一种异构的车辆集群框架,称为目标和兴趣感知集群框架。该框架集成了车载自组织网络与LTE网络,以提高道路交通效率。在此基础上,给出该框架的模型系统。使用模型检测技术对该模型进行形式验证,在功能层面评估其性能。为在微观层面评估该框架性能,通过整合最先进的工具创建异构仿真环境。仿真结果表明,与其他方法相比,该框架具有更好性能。

关键词：车辆集群异构性协同形式验证系统模型

A cooperative heterogeneous vehicular clustering framework for

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Frontiers of Information Technology & Electronic Engineering 2021年第9期22卷 1247-1259页

作者： Iftikhar AHMAD rafidah md NOOR Zaheed AHMED Umm-e-HABIBA Naveed AKRAM Fausto Pedro GARCIA MARQUEZ Department of Computer Science and Information Technology MirpurUniversity of Science and TechnologyMirpur-10250(AJK)Pakistan Facultyof Computer Science and Information Technology University of MalayaKualaLumpur 50603Malaysia Departmentof Software Engineering University of KotliAJK 11100Pakistan Department of Mechanical Engineering Mirpur University of Science andTechnologyMirpur-10250(AJK)Pakistan Department of MechanicalEngineering Faculty of Mechanical EngineeringUniversity of MalayaKualaLumpur 50603Malaysia Ingenium Research Group University of Castilla-LaManchaSpain

Heterogeneous vehicular clustering integrates multiple types of communication networks to work efficiently for various vehicular *** popular form of heterogeneous network is the integration of long-term evolution(LTE)and dedicated short-range *** heterogeneity of such a network infrastructure and the non-cooperation involved in sharing cost/data are potential problems to solve.A vehicular clustering framework is one solution to these problems,but the framework should be formally verified and validated before being deployed in the real *** solve these issues,first,we present a het-erogeneous framework,named destination and interest-aware clustering,for vehicular clustering that integrates vehicular ad hoc networks with the LTE network for improving road traffic ***,we specify a model system of the proposed *** model is formally verified to evaluate its performance at the functional level using a model checking *** evaluate the performance of the proposed framework at the micro-level,a heterogeneous simulation environment is created by integrating state-of-the-art *** comparison of the simulation results with those of other known approaches shows that our proposed framework performs better.

关键词： Vehicular cluster Heterogeneity Cooperation Formal verification System model