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Understanding network travel time reliability with on-demand ride service data

Xiqun (Michael) CHEN, Xiaowei CHEN, Hongyu ZHENG, Chuqiao CHEN

Frontiers of Engineering Management 2017, Volume 4, Issue 4,   Pages 388-398 doi: 10.15302/J-FEM-2017046

Abstract: on-demand ride service data are proposed: network free flow time rate (NFFTR), network travel time rate(NTTR), network planning time rate (NPTR), network buffer time rate (NBTR), and network buffer timerate index (NBTRI).These indices take into account the probability distribution of the travel time rate (i.e., travel timeof the road network traffic dynamics and day-to-day travel time variations.

Keywords： network travel time reliability     on-demand ride services     travel time rate     OD    

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Efficient detection methods for amplify-and-forward relay-aided device-to-device systems with full-ratespace-time block code Article

Kang-li ZHANG, Cong ZHANG, Fang-lin GU, Jian WANG

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 6,   Pages 788-795 doi: 10.1631/FITEE.1700018

Abstract: circumvent the prohibitive complexity problem of traditional maximum likelihood (ML) detection for full-ratespace-time block code (FSTBC) transmission, two low-complexity detection methods are proposed, i.e.,

Keywords： Device-to-device     Relay     Detection     Full-rate space-time block code    

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Appraisal of coastal recreational resources in Qingdao by travel cost method

Jingmei LI , Tieying LIU , Yuanyuan ZHANG , Lei LI ,

Frontiers of Environmental Science & Engineering 2009, Volume 3, Issue 3,   Pages 341-347 doi: 10.1007/s11783-009-0038-z

Abstract: This paper serves to appraise the monetary cost of coastal recreational resources in Qingdao using the travelThese questionnaires establish correlation functions that factor in the number of tourists, travel expenseswas used to determine the tourist demand regression curve and to calculate their residual and actual travel

Keywords： coastal recreational resources     travel cost method (TCM)     regression analysis     Qingdao     China    

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Real-time tool condition monitoring method based on temperature measurement and artificial neural network

Frontiers of Mechanical Engineering doi: 10.1007/s11465-021-0661-3

Abstract: Here, a real-time tool condition monitoring method integrated in an in situ fiber optic temperatureA learning rate adaption algorithm is introduced, greatly reducing the dependence on initial parametersFurthermore, an application program with a graphical user interface is constructed to present real-time

Keywords： tool condition monitoring     cutting temperature     neural network     learning rate adaption    

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Applicability of the Arrhenius model for Ammonia Oxidizing Bacteria subjected to temperature time gradients

Alberto MANNUCCI,Giulio MUNZ,Gualtiero MORI,Claudio LUBELLO,Jan A. OLESZKIEWICZ

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 6,   Pages 988-994 doi: 10.1007/s11783-014-0751-0

Abstract: Arrhenius type temperature dependence for Ammonia Oxidizing Bacteria (AOB) subjected to temperature timedifferential titrimetric technique was used to continuously monitor the maximum biologic ammonia oxidation rateof the biomass selected in a pilot scale membrane bioreactor, as a function of temperature time gradientsThe dependence of growth kinetics on temperature time gradients and the range of applicability of Arrheniusestimated Arrhenius coefficients ( ) were shown to increase from 1.07 to 1.6 when the temperature decrease rate

Keywords： nitrification rate     temperature effect     continuous titrimetric tests     time-gradient temperature variations    

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Short-term prediction of influent flow rate and ammonia concentration in municipal wastewater treatment

Shuai MA, Siyu ZENG, Xin DONG, Jining CHEN, Gustaf OLSSON

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 1,   Pages 128-136 doi: 10.1007/s11783-013-0598-9

Abstract: method is presented in this paper in order to estimate and predict the periodicity of the influent flow rateTo give meaningful information for feedforward control systems, predictions in different time scalesin different cycles (especially cycles longer than 1 day); 2) when the flow rate and NH concentrationsperiodicity, the decreasing of prediction accuracy is not distinct with increasing of the prediction timeperiodicity influence is larger than rainfalls; 4) the rainfalls will make the periodicity of flow rate

Keywords： influent load prediction     wavelet de-noising     power spectrum density     autoregressive model     time-frequency    

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Mechatronic design of a novel linear compliant positioning stage with large travel range and high out-of-plane

Hua LIU, Xin XIE, Ruoyu TAN, Lianchao ZHANG, Dapeng FAN

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 2,   Pages 265-278 doi: 10.1007/s11465-017-0453-y

Abstract: These parallelograms are serially connected for a large travel range and a high out-of-plane payloadThe stage has a travel range of 4.4 mm× 7.0 mm and a 0.16% area ratio of workspace to the outer

Keywords： mechatronic design     linear compliant positioning stage     large travel range     high out-of-plane payload capacity    

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Middle East respiratory syndrome coronavirus: current situation and travel-associated concerns

Jaffar A. Al-Tawfiq,Ali S. Omrani,Ziad A. Memish

Frontiers of Medicine 2016, Volume 10, Issue 2,   Pages 111-119 doi: 10.1007/s11684-016-0446-y

Abstract: More than 1500 MERS-CoV cases were recorded in 42 months with a case fatality rate (CFR) of 40%.Travel-associated MERS infection remains low.In this review, we summarize the current knowledge about MERS-CoV and highlight travel-related issues

Keywords： coronavirus     MERS     Middle East respiratory syndrome    

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The Study of Sprinkler Performance in Fire

Zhang Cunfeng,Huo Ran,Li Yuanzhou

Strategic Study of CAE 2005, Volume 7, Issue 11,   Pages 55-59

Abstract:

This paper studied on the activation time of sprinkler and the critical heat release rate to activateactivation time.and the environment temperature; the fire development mode would affect the increasing rate of the activationtime; the exponential relationship was found between the activation time and the response time indexAs the height increased, the critical heat release rate would increase.

Keywords： sprinkler head     critical heat release rate     response time    

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Operation safety risk analysis method of hydropower project considering time-dependent effect

Zhang Sherong,YanLei

Strategic Study of CAE 2011, Volume 13, Issue 12,   Pages 51-55

Abstract:

In order to consider the time-dependent characteristic of risk factorsproject is established on the comprehensive application of the improved analytic hierarchy process, the time-dependentreliability theory and the risk rate threshold.A scheme to demonstrate the time-dependent risk rate assessment method for an example of the earth-rockstandard; considering the effect of time-dependent, the risk rate increases with time and the intersection

Keywords： operation safety of hydropower project     risk analysis     risk rate assessment     time-dependent reliability    

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A Modification of Evacuation Time Computational Model andSimulation Comparison Analyses With Olympic

Zhang Qingsong,Liu Mao,Zhao Guomin

Strategic Study of CAE 2007, Volume 9, Issue 4,   Pages 64-69

Abstract:

In this paper, a computational evacuation discrete time model(EDTM) hasbeen presented to analyze the building egress evacuation time problem with previous works, and discussesto the occupants for movement,  which is more accurate and practicable because the crowd flow rateis variable, while the crowd flow rate as the function of crowd density based on the empirical relationsshows great value in dealing with stadium,  especially the2008Beijing Olympic stadium, evacuation time

Keywords： evacuation time     crowd flow rate     egress     simulation     Olympic stadium    

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Supersonic Travel Seeks an Encore

Sean O´Neill,

Engineering 2022, Volume 10, Issue 3,   Pages 1-3 doi: 10.1016/j.eng.2022.01.004

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Future urban transport management

Frontiers of Engineering Management   Pages 534-539 doi: 10.1007/s42524-023-0255-3

Abstract: The incorporation of disruptive innovations into the transportation industry will inevitably cause major upheavals in the transportation sector. However, existing research lacks systematic theories and methodologies to represent the underlying characteristics of future urban transport systems. Furthermore, emerging modes in urban mobility have not been sufficiently studied. The National Natural Science Foundation of China (NSFC) officially approved the Basic Science Center project titled “Future Urban Transport Management” in 2022. The project members include leading scientists and engineers from Beijing Jiaotong University, Beihang University, and Beijing Transport Institute. Based on a wide range of previous projects by the consortium on urban mobility and sustainable cities, this project will encompass transdisciplinary and interdisciplinary research to explore critical issues affecting future urban traffic management. It aims to develop fundamental theories and methods based on social and technological developments in the near future and explores innovative solutions to implement alongside these emerging developments in urban mobility.

Keywords： future urban transport management     travel behavior characteristics     transportation operations     transportation    

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Creep-fatigue crack growth behavior in GH4169 superalloy

Dianyin HU, Xiyuan WANG, Jianxing MAO, Rongqiao WANG

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 3,   Pages 369-376 doi: 10.1007/s11465-018-0489-7

Abstract: growth experiments were performed on compact tension specimens using trapezoidal waveform with dwell timeThe crack growth rate of GH4169 superalloy significantly increased with dwell time.In addition, testing data under the same dwell time showed scattering at the crack growth rate.based on the Saxena equation was proposed by introducing a distribution factor for the crack growth ratethe small grain size and high volume fraction of the d phase led to a fast creep-fatigue crack growth rate

Keywords： crack growth rate     creep-fatigue     GH4169 superalloy     CT specimen     dwell time    

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Assessing the Effect of Global Travel and Contact Restrictions on Mitigating the COVID-19 Pandemic Article

Shengjie Lai, Nick W. Ruktanonchai, Alessandra Carioli, Corrine W. Ruktanonchai, Jessica R. Floyd, Olivia Prosper, Chi Zhang, Xiangjun Du, Weizhong Yang, Andrew J Tatem

Engineering 2021, Volume 7, Issue 7,   Pages 914-923 doi: 10.1016/j.eng.2021.03.017

Abstract:

Travel restrictions and physical distancing have been implemented across the world to mitigate the2019 (COVID-19) pandemic, but studies are needed to understand their effectiveness across regions and timewave of the pandemic in 2020, we built a metapopulation epidemiological model to measure the effect of travel

Keywords： COVID-19     Pandemic     Population mobility     Travel restriction     Physical distancing    

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Title Author Date Type Operation

Understanding network travel time reliability with on-demand ride service data

Xiqun (Michael) CHEN, Xiaowei CHEN, Hongyu ZHENG, Chuqiao CHEN

Journal Article

Efficient detection methods for amplify-and-forward relay-aided device-to-device systems with full-ratespace-time block code

Kang-li ZHANG, Cong ZHANG, Fang-lin GU, Jian WANG

Journal Article

Appraisal of coastal recreational resources in Qingdao by travel cost method

Jingmei LI , Tieying LIU , Yuanyuan ZHANG , Lei LI ,

Journal Article

Real-time tool condition monitoring method based on temperature measurement and artificial neural network

Journal Article

Applicability of the Arrhenius model for Ammonia Oxidizing Bacteria subjected to temperature time gradients

Alberto MANNUCCI,Giulio MUNZ,Gualtiero MORI,Claudio LUBELLO,Jan A. OLESZKIEWICZ

Journal Article

Short-term prediction of influent flow rate and ammonia concentration in municipal wastewater treatment

Shuai MA, Siyu ZENG, Xin DONG, Jining CHEN, Gustaf OLSSON

Journal Article

Mechatronic design of a novel linear compliant positioning stage with large travel range and high out-of-plane

Hua LIU, Xin XIE, Ruoyu TAN, Lianchao ZHANG, Dapeng FAN

Journal Article

Middle East respiratory syndrome coronavirus: current situation and travel-associated concerns

Jaffar A. Al-Tawfiq,Ali S. Omrani,Ziad A. Memish

Journal Article

The Study of Sprinkler Performance in Fire

Zhang Cunfeng,Huo Ran,Li Yuanzhou

Journal Article

Operation safety risk analysis method of hydropower project considering time-dependent effect

Zhang Sherong,YanLei

Journal Article

A Modification of Evacuation Time Computational Model andSimulation Comparison Analyses With Olympic

Zhang Qingsong,Liu Mao,Zhao Guomin

Journal Article

Supersonic Travel Seeks an Encore

Sean O´Neill,

Journal Article

Future urban transport management

Journal Article

Creep-fatigue crack growth behavior in GH4169 superalloy

Dianyin HU, Xiyuan WANG, Jianxing MAO, Rongqiao WANG

Journal Article

Assessing the Effect of Global Travel and Contact Restrictions on Mitigating the COVID-19 Pandemic

Shengjie Lai, Nick W. Ruktanonchai, Alessandra Carioli, Corrine W. Ruktanonchai, Jessica R. Floyd, Olivia Prosper, Chi Zhang, Xiangjun Du, Weizhong Yang, Andrew J Tatem

Journal Article