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Implementation of a real-time, data-driven online Epidemic Calculator for tracking the spread of COVID-19 in Singapore and other countries

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Infectious Disease Modelling 2021年第1期6卷 1159-1172页

作者： fook fah yap Minglee Yong Nanyang Technological University School of Mechanical and Aerospace Engineering50 Nanyang AveSingapore639798Singapore Nanyang Technological University National Institute of Education1 Nanyang WalkSingapore637616Singapore

While there are many online data dashboards on COVID-19,there are few analytics available to the public and non-epidemiologists to help them gain a deeper insight into the COVID-19 pandemic and evaluate the effectiveness of social intervention measures.To address the issue,this study describes the methods underlying the development of a realtime,data-driven online Epidemic Calculator for tracking COVID-19 growth parameters.From publicly available infection case and death data,the calculator is used to estimate the effective reproduction number,final epidemic size,and death toll.As a case study,we analyzed the results for Singapore during the"Circuit Breaker"period from April 7,2020 to the end of May 2020.The calculator shows that the stringent measures imposed have an immediate effect of rapidly slowing down the spread of the coronavirus.After about two weeks,the effective reproduction number reduced to about 1.0.Since then,the number has been fluctuating around 1.0 for more than a month.The COVID-19 Epidemic Calculator is available in the form of an online Google Sheet and the results are presented as Tableau Public dashboards at www.***.one.By making the calculator readily accessible online,the public can have a tool to assess the effectiveness of measures to control the pandemic meaningfully.

关键词： COVID-19 Reproduction number Doubling time Epidemic calculator Singapore

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Reducing Fuel Consumption Using Flywheel Battery Technology for Rubber Tyred Gantry Cranes in Container Terminals

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Journal of Power and Energy Engineering 2017年第7期5卷 15-33页

作者： Kai Hou Tan yap fook fah School of Mechanical and Aerospace Engineering Nanyang Technological University Singapore

Flywheel Energy Storage System (FESS) is used as an energy regeneration system to help with reducing peak power requirements on RTG cranes that are used to load or unload container ships. Nevertheless, with the use of FESS, Port Operator can deploy undersized generator for new RTG as this will further reduce fuel consumption. This paper presents the investigation of the amount of energy and fuel consumption that can be reduced in Rubber Tyred Gantry (RTG) cranes in container terminals by the use of simulation. In addition, Variable Speed Generator is integrated to the simulation-hybridized RTG. Simulation results reveal that the total energy saving exceeded 30% relatively to conventional RTG. A hardware-in-loop system is introduced for the purpose of validating the simulation results. The hardware components procured include a FESS, a Variable Frequency Drive (VFD) and brake resistors.

关键词： Flywheel Energy Storage System Rubber Tyred Gantry Mechanical Battery Hardware-in-Loop (HIL) Simulation

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Hypoxia increases adipogenesis and affects adipocytokine production in orbital fibroblasts-a possible explanation of the link between smoking and Graves' ophthalmopathy

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International Journal of Ophthalmology(English edition) 2014年第3期7卷 403-407页

作者： Chiaw Ling Chng Oi fah Lai Charmaine Sze-Min Chew Yu Pei Peh Stephanie Man-Chung fook-Chong Lay Leng Seah Daphne Hsu-Chin Khoo Department of Endocrinology Singapore General HospitalLevel 3 the Academia 20 College Road 169856 Singapore Department of Clinical Research Academia Discovery Tower Level 9 Research Office 2 20 College Road 169856Singapore Oculoplastic/Aesthetic Eyeplastic Service Singapore National Eye Centre 11 Third Hospital Avenue 168751Singapore

AIM:To assess the effects of hypoxia on human orbital fibroblasts(OF)on adipogenesis and adipocytokine production.METHODS:Human OF were derived from tissues obtained from patients with Graves’ophthalmopathy(GO)and from patients without known thyroid diseases undergoing blepharoplasty.The OF were cultured separately under normoxic and hypoxic conditions.Comparisons of adipocytokine concentrations using multiplex ELISA and lipid accumulation in the cells using Oil Red O staining were subsequently performed.RESULTS:There was increased adipogenesis in OF from GO subject when exposed to hypoxic culture conditions.This was not observed in OF from normal controls.Hypoxia led to an increase in leptin and a decrease in MCP-1 secretion in OF cultures.CONCLUSION:Hypoxia induces adipogenesis in OF and may represent a mechanism by which smoking contributes to deterioration of GO.We also found novel changes to leptin and MCP-1 production in OF cultures exposed to hypoxia suggesting important roles of these cytokines in the disease process.

关键词： hypoxia smoking Graves' ophthalmopathy

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吉隆坡标志塔工程施工物资管理实践

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施工技术 2019年第17期48卷 13-16,23页

作者：曹鹏宗乃旭叶钧华中国建筑第八工程局有限公司

'一带一路'倡议为中国施工企业对外承包工程带来了巨大发展机遇,施工企业要保证工程项目的顺利实施需建立完善的物资管理体系。以马来西亚吉隆坡标志塔项目高效的物资管理为案例,从物资管理组织机构、管理流程、物资采购、运输、调转、... 详细信息

'一带一路'倡议为中国施工企业对外承包工程带来了巨大发展机遇,施工企业要保证工程项目的顺利实施需建立完善的物资管理体系。以马来西亚吉隆坡标志塔项目高效的物资管理为案例,从物资管理组织机构、管理流程、物资采购、运输、调转、垂直运输机械选择等方面对国际大型工程施工物资管理进行实践和探索,总结国际工程物资管理的经验。

关键词：高层建筑物资管理现场物流垂直运输施工技术

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