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Using big data and machine learning to rank traffic signals in Tennessee

Journal of Traffic and Transportation Engineering(English Edition) 2023年第5期10卷 918-933页

作者： Christopher Winfrey Piro Meleby lei miao Department of Engineering Technology Middle Tennessee State UniversityMurfreesboroTN 37132USA

This paper discusses low-cost approaches capable of ranking traffic intersections for the purpose of signal *** extracted intersections that are comprised of multiple roads,defined by alphanumeric traffic message channel segment codes per international classification *** of these road segments includes a variety of metrics,including congestion,planning time index,and bottleneck ranking information provided by the Regional Integrated Transportation Information *** first approach was to use a ranking formula to calculate intersection rankings using a score between 0 and 10 by considering data for different times of the day and different days of the week,weighting weekdays more heavily than weekends and morning and evening commute times more heavily than other times of *** second method was to utilize unsupervised machine learning algorithms,primarily k-means clustering,to accomplish the intersection ranking *** first approach this by checking the performance of basic k-means clustering on our data *** then explore the ranking problem further by utilizing data provided by traffic professionals in the state of *** exploration involves using MATLAB to minimize the mean-squared error of intersection rankings to determine the optimum weights in the ranking formula based on a city’s professional *** then attempted an optimization of our weights via a brute-force search approach to minimize the distance from ranking formula results to the clustering *** the ranking information was aggregated into an online SQL database hosted by Amazon web services that utilized the PHP scripting language.

关键词： Unsupervised machine learning Clustering k-means Traffic signals

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Recent advances in traffic signal performance evaluation

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Journal of Traffic and Transportation Engineering(English Edition) 2022年第4期9卷 507-531页

作者： Dallas leitner Piro Meleby lei miao Department of Engineering Technology Middle Tennessee State UniversityMurfreesboroTN 37132USA

Signal retiming is a prominent way that transportation agencies use to fight congestion and change of traffic *** evaluations of traffic conditions at signalized intersections and arterials provide actionable data for agencies to make well-informed and prioritized signal retiming ***,the abundance of data sources,the lack of standardized evaluation methods and oftentimes the shortage of resources make it a difficult *** review detailed in this paper examines the advances made in traffic signal performance *** establish the necessity for the evaluations,study the process of continuous improvement of traffic signal performance using the evaluations,and then examine multiple methodologies in a plethora of research ***,we focus on probe vehicles and sensors data,the two major sources of *** discuss how sensors are connected to signal controllers to provide relevant in-depth traffic data including speed and occupancy *** also review the nature of probe vehicles and the level of *** then define and summarize performance measures derived from both sources,to aid in performance *** performance evaluation methods,we discuss the research studies and provide summaries including advantages and disadvantages of the methods used,as well as a holistic outlook for future *** paper is aimed to provide a comprehensive review on the state-of-the-art to benefit researcher,traffic agencies,and commercial entities that thrive to improve safety and efficiency of traffic signals through performance evaluations.

关键词： Intelligent transportation systems Traffic signal performance evaluation Traffic signal retiming Traffic signals optimization Intersection control evaluation

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Recent advances in connected and automated vehicles

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Journal of Traffic and Transportation Engineering(English Edition) 2019年第2期6卷 109-131页

作者： David Elliott Walter Keen lei miao Mahle Filter Systems North America Inc. Department of Engineering Technology Middle Tennessee State University

Connected and automated vehicle(CAV) is a transformative technology that has great potential to change our daily life. Therefore, CAV related research has been advanced significantly in recent years. This paper does a comprehensive review on five selected subjects that lie in the heart of CAV research:(i) inter-CAV communications;(ii) security of CAVs;(iii) intersection control for CAVs;(iv) collision-free navigation of CAVs; and(v)pedestrian detection and protection. It is believed that these topics are essential to ensure the success of CAVs and need to be better understood. For inter-CAV communications, this paper focuses on both Dedicated Short Range Communications(DSRC) and the future 5 G cellular technologies; for security of CAVs, this paper discusses both passive and active attacks and the existing solutions; for intersection control, this paper summarizes the pros and cons of both centralized and decentralized approaches; for collision avoidance, this paper concentrates on four subareas: maneuverability, vehicle networking, control confliction, and motorcycles; for pedestrian detection, this paper covers sensor, radar, and computer vision based approaches. Under each topic, this paper not only shows the stateof-the-art, but also unveils potential future research directions. By establishing connections among these subjects, this paper shows how they interact with each other and how they can be integrated into a seamless user experience. It is believed that the literature covered and conclusions drawn in this paper are very helpful to CAV researchers, application engineers, and policy makers.

关键词： Connected and automated vehicles Autonomous vehicles Intelligent transportation systems Driver-less cars

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Hypothesis, Modern Researches and Clinical Applications of Cutaneous Regions in Traditional Chinese Medicine

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Journal of Acupuncture and Tuina Science 2014年第2期12卷 125-130,I0001,I0002页

作者： Fan lei Yin lei-miao Shanghai Research Institute of Acupuncture and Meridian

As one of the most important concepts in traditional Chinese medicine, cutaneous regions have a close relationship with skin in modern medicine. According to the doctrine of traditional Chinese medicine, the cutaneous regions are the corresponding projections of twelve meridians in the superficial layer of the body and play an important role in body surface-viscera correlation. The symptoms of visceral disorders will reflect on cutaneous regions and one of the major patterns of manifestation is referred visceral pain accompanied by tenderness and hyperalgesia on the body surface. On the contrary, cutaneous regions participate in the treatment of visceral disorders. As major clinical applications of the cutaneous regions hypothesis, superficial acupuncture, subcutaneous needling, massage(tuina), moxibustion, and wrist-ankle acupuncture have achieved favorable therapeutic outcomes in clinical practice. Modern researches have gained insights into the biological background of cutaneous regions, however, further studies are needed to clarify the mechanisms.

关键词： Cutaneous Regions Body Surface-viscera Correlation SuperficialAcupuncture Subcutaneous Needling Massage Tuina MoxibustionTherapy Wrist-ankle Acupuncture

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Anaplastic lymphoma kinase-negative anaplastic large cell lymphoma masquerading as Behcet’s disease: A case report and review of literature

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World Journal of Clinical Cases 2019年第20期7卷 3377-3383页

作者： Juan Luo Ying-Han Jiang Zi lei Ying-lei miao Department of Gastroenterology the First Affiliated Hospital of Kunming Medical UniversityInstitute of Digestive DiseaseKunming 650000Yunnan ProvinceChina Department of Pathology the First People’s Hospital of Yunnan ProvinceKunming 650000Yunnan ProvinceChina Department of Pathology the First Affiliated Hospital of Kunming Medical UniversityKunming 650000Yunnan ProvinceChina

BACKGROUND Anaplastic large cell lymphoma(ALCL)is a CD30-positive T cell lymphoma,a rare type of non-Hodgkin *** current World Health Organization classification system divides ALCLs into anaplastic lymphoma kinase(ALK)-positive and ALK-negative *** rarely presents in the gastrointestinal *** SUMMARY A 54-year-old male was admitted to the department of gastroenterology for abdominal *** presented with lower abdominal pain,diarrhea and recurrent oral and penile *** was misdiagnosed with Behcet's disease and treated with *** after one month,he was hospitalized in another hospital for *** time,the lesion on the penis was biopsied for histological *** final pathological diagnosis was ALCL,*** patient was treated with cyclophosphamide,doxorubicin,vincristine,prednisolone ***,he died within one *** Gastrointestinal ALCL needs to be considered in the differential diagnosis to avoid delaying *** biopsy is the most important for early diagnosis and treatment.

关键词： Anaplastic large cell lymphoma Anaplastic lymphoma kinase Behcet's disease Colon ulcer Penis ulcer Case report

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Dehydrogenation of methylcyclohexane over Pt supported on Mg–Al mixed oxides catalyst:The effect of promoter Ir

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Chinese Journal of Chemical Engineering 2020年第9期28卷 2337-2342页

作者： lei miao Jing Yan Weiyan Wang Yanping Huang Wensong Li Yunquan Yang School of Chemical Engineering Xiangtan UniversityXiangtan 411105China

To enhance the hydrogen release during hydrogen storage,several Pt-Ir supported on Mg-Al mixed oxide catalysts were prepared and then applied into the dehydrogenation of methylcyclohexane(MCH)in this *** effects of iridium content,reduction temperature on the activity and stability of the catalysts were studied in *** the presence of Ir,metal particle size was decrea sed and electron transfer between Ir and Pt was *** reduction temperature increased the metallic Ir content but enlarged the particle size of active site *** the dehydrogenation reaction on Pt-Ir bimetallic catalyst,MCH was efficiently converted into toluene and PtIr-5/Mg-Al-275 exhibited the highe st *** prolonging the residence time and raising the reaction temperature to 350℃the conversion and hydrogen evolution rate were increased to 99.9%and 578.7 mmol·(g Pt)^-1·min^-1,***,no carbon deposition was observed in the spent catalyst,presenting a high anti-coking ability and good potential for industrial application.

关键词： Dehydrogenation Methylcyclohexane Mg-Al mixed metal oxides Pt-Ir Stability

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Automatic pectoral muscle boundary detection in mammograms based on Markov chain and active contour model

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Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第2期11卷 111-118页

作者： lei WANG miao-liang ZHU Li-ping DENG Xin YUAN School of Computer Science and Technology Zhejiang University Hangzhou 310027 China

Automatic pectoral muscle removal on medio-lateral oblique (MLO) view of mammogram is an essential step for many mammographic processing algorithms. However,it is still a very difficult task since the sizes,the shapes and the intensity contrasts of pectoral muscles change greatly from one MLO view to another. In this paper,we propose a novel method based on a discrete time Markov chain (DTMC) and an active contour model to automatically detect the pectoral muscle boundary. DTMC is used to model two important characteristics of the pectoral muscle edge,i.e.,continuity and uncertainty. After obtaining a rough boundary,an active contour model is applied to refine the detection results. The experimental results on images from the Digital Database for Screening Mammography (DDSM) showed that our method can overcome many limitations of existing algorithms. The false positive (FP) and false negative (FN) pixel percentages are less than 5% in 77.5% mammograms. The detection precision of 91% meets the clinical requirement.

关键词： Pectoral muscle Markov chain Active contour Mammogram

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Rare primary rectal mucosa-associated lymphoid tissue lymphoma with curative resection by endoscopic submucosal dissection:A case report and review of literature

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World Journal of Clinical Cases 2022年第21期10卷 7599-7608页

作者： Yan Tao Qiong Nan Zi lei Ying-lei miao Jun-Kun Niu Department of Gastroenterology The First Affiliated Hospital of Kunming Medical UniversityYunnan Province Clinical Research Center for Digestive DiseasesKunming 650032Yunnan ProvinceChina Department of Pathology The First Affiliated Hospital of Kunming Medical UniversityKunming 650032Yunnan ProvinceChina

BACKGROUND Extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue(MALT lymphoma)occurs in approximately 9%of non-Hodgkin B-cell *** gastrointestinal tract is the most commonly affected site of the extranodal forms of primary non-Hodgkin’s ***,it rarely occurs within the rectum,and at present,there is no consensus on its diagnosis and treatment at this *** SUMMARY We report a rare laterally spreading tumour-like rectal MALT lymphoma case in which the diagnosis and the depth of infiltration were determined by magnifying endoscopy and ultrasonic ***,the lesion was en bloc resected by endoscopic submucosal dissection(ESD)*** lesion was confirmed as MALT lymphoma by haematoxylin and eosin staining,immunohistochemical staining and gene arrangement *** exams have indicated a 2-year disease-free survival for this *** We report a rare primary rectal MALT lymphoma that was curable with resection by *** is a safe and effective therapeutic option for rectal MALT lymphoma.

关键词： Rectum Mucosa-associated lymphoid tissue lymphoma Endoscopic submucosal dissection En bloc resection Case report

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Nanoparticle cancer vaccines:Design considerations and recent advances

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Asian Journal of Pharmaceutical Sciences 2020年第5期15卷 576-590页

作者： Jingjing Liu lei miao Jiying Sui Yanyun Hao Guihua Huang The School of Pharmaceutical Sciences Shandong UniversityJi’nan 250012China David H.Koch Institute for Integrative Cancer Research Massachusetts Institute of TechnologyCambridge MA 02139USA Affiliated Hospital of Shandong Academy of Medical Sciences Ji’nan 250012China

Vaccines therapeutics manipulate host’s immune system and have broad potential for cancer prevention and ***,due to poor immunogenicity and limited safety,fewer cancer vaccines have been successful in clinical *** the past decades,nanotechnology has been exploited to deliver cancer vaccines,eliciting longlasting and effective immune *** to traditional vaccines,cancer vaccines delivered by nanomaterials can be tuned towards desired immune profiles by(1)optimizing the physicochemical properties of the nanomaterial carriers,(2)modifying the nanomaterials with targeting molecules,or(3)co-encapsulating with *** order to develop vaccines with desired immunogenicity,a thorough understanding of parameters that affect immune responses is ***,we discussed the effects of physicochemical properties on antigen presentation and immune response,including but not limited to size,particle rigidity,intrinsic ***,we provided a detailed overview of recent preclinical and clinical advances in nanotechnology for cancer vaccines,and considerations for future directions in advancing the vaccine platform to widespread anti-cancer applications.

关键词： Cancer Vaccines Nanotechnology Antigens Peptide mRNA

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The dimension and morphology of alveolar bone at maxillaryanterior teeth in periodontitis: a retrospective analysis usingCBCT

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International Journal of Oral Science 2020年第1期12卷 50-58页

作者： Xue Zhang Yuchao Li Ziming Ge Haijiao Zhao lei miao Yaping Pan Department of Periodontics School of StomatologyChina Medical UniversityShenyangChina

The morphology of the alveolar bone at the maxillary anterior teeth in periodontitis patients was evaluated by cone-beam computed tomography(CBCT) to investigate the distribution of alveolar defects and provide guidance for clinical practice. Ninety periodontitis patients and 30 periodontally healthy individuals were selected to determine the morphology of the alveolar bone at the maxillary anterior teeth according to the degree of bone loss, tooth type, sex and age. The differences in the dimensions between periodontitis patients and healthy individuals were compared, and the distribution of alveolar bone defects was analyzed.A classification system was established regarding the sagittal positions and angulations of the teeth. The buccal residual bone was thicker and the lingual bone was thinner in the periodontitis patients than in the periodontally healthy individuals, and there were differences between the different tooth types, sexes and age subgroups. The buccal undercut was close to the alveolar ridge, while fenestration was reduced and the apical bone height was higher in periodontitis patients than in periodontally healthy *** apical bone height increased with the aggravation of bone loss and age. The proportions of different sagittal positions changed with the aggravation of bone loss. Moreover, the teeth moved more buccally regarding the positions of the maxillary anterior *** morphology of the alveolar bone at the maxillary anterior teeth differed between periodontitis patients and healthy individuals,and the differences were related to the degree of bone loss, tooth type, sex and age.

关键词： alveolar CBCT positions

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