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Autonomous vehicles wheel wander: Structural impact on flexible pavements

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Journal of Traffic and Transportation Engineering(English Edition) 2021年第3期8卷 388-398页

作者： Konstantina Georgouli christina plati Andreas Loizos Department of Transportation Planning and Engineering School of Civil EngineeringNational Technical University of AthensZografou 15773Greece

Autonomous vehicles(AVs), including trucks, are already available and their adoption is coming at a rapid pace. Despite the fact that this new transportation technology will travel on existing pavement infrastructure assets, the study and investigation of the AVs structural impact on pavements has not reached the same level of attention and maturity as other related research areas. Considering the extensive investment on pavement construction and maintenance, the necessity to fully understand these impacts in the long term, is becoming evident. The present paper presents and discusses currently published relevant research and findings on the quantification of the wheel wander potential impact,both negative and positive, offering potential insightful future areas of enquiry to help mold and shape future research for this emerging field. The paper focuses on the impact of the AVs zero lateral wheel wander on both new flexible pavement design and the damage accumulation within existing flexible pavement structures. Other wheel wander distributions(normal, uniform, etc.) are investigated as well. The outcome and findings are that the AVs zero lateral wheel wander has a definable negative structural impact on flexible pavement structures in comparison to current human-driven(non-autonomous) vehicles that tend to follow a normal lateral wheel wander distribution. However, under certain defined conditions(optimal wheel wander distribution), the pavement service life can be potentially extended.

关键词： Road engineering Autonomous vehicles Wheel wander Pavement design Pavement performance

FORECASTING EXCHANGE RATES: AN OPTIMAL APPROACH

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Journal of Systems Science & Complexity 2014年第1期27卷 21-28页

作者： BENEKI christina YARMOHAMMADI Masoud School of Business and Economics Department of Business Administration Technological Educational Instituteof Ionian Islands 31100 Lefkada Greece. Department of Statistics Payame Noor University 19395-4697 Tehran Islamic Republic of Iran.

This paper looks at forecasting daily exchange rates for the United Kingdom, European Union, and China. Here, the authors evaluate the forecasting performance of neural networks （NN）, vector singular spectrum analysis （VSSA）, and recurrent singular spectrum analysis （RSSA） for fore casting exchange rates in these countries. The authors find statistically significant evidence based on the RMSE, that both VSSA and RSSA models outperform NN at forecasting the highly unpredictable exchange rates for China. However, the authors find no evidence to suggest any difference between the forecasting accuracy of the three models for UK and EU exchange rates.

关键词： China European union exchange rates forecasting neural networks recurrent singularspectrum analysis United Kingdom vector singular spectrum analysis.

Electrochemical and spectroelectrochemical characterization of different mesoporous TiO2 film electrodes for the immobilization of Cytochrome c

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Frontiers of Materials Science 2018年第1期12卷 64-73页

作者： Stavros KATSIAOUNIS christina TIFLIDIS christina TSEKOURA Emmanuel TOPOGLIDIS Department of Materials Science University of Patras Rion 26504 Greece

In this work three different mesoporous TiO2 film electrodes were prepared and used for the immobilization of Cytochrome c （Cyt-c）. Films prepared via a standard sol-gel route （SG-films） were compared with commercially available benchmark nanotitania materials, namely P25 Degussa （P25-films） and Dyesol nanopaste （Dyesol films）. Their properties, film deposition characteristics and their abilities to adsorb protein molecules in a stable and functional way were examined. We investigated whether it is possible, rather than preparing TiO2 films using multistep, lengthy and not always reproducible sol-gel procedures, to use commercially available nanotitania materials and produce reproducible films faster that exhibit all the properties that make TiO2 films ideal for protein immobilization. Although these materials are formulated primarily for dye-sensitized solar cell applications, in this study we found out that protein immobilization is facile and remarkably stable on all of them. We also investigated their electrochemical properties by using cyclic voltammetry and spectroelectrochemistry and found out that not only direct reduction of Fe（III）-heme to Fe（II）-heme of immobilized Cyt-c was possible on all flms but that the adsorbed protein remained electroactive.

关键词： TiO2 films spectroelectrochemistry cyclic voltammetry Cytochrome c

Volatile and C-H-O isotopic compositions of giant Fe-Ti-V oxide deposits in the Panxi region and their implications for the sources of volatiles and the origin of Fe-Ti oxide ores

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Science China Earth Sciences 2012年第11期55卷 1782-1795页

作者： WANG christina Yan Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China

The Panzhihua,Hongge,and Baima Fe-Ti-V oxide deposits in the Panzhihua-Xichang(Panxi) region are hosted in large layered mafic-ultramafic *** layered intrusions intrude either the Neoproterozoic Dengying Formation,composed mainly of limestone,or the Paleoproterozoic Hekou Formation,composed of meta-sedimentary-volcanic *** remains unclear if the wall rocks have been involved during the fractionation of magmas and have affected the sequence of crystallization of Fe-Ti *** and their C-H-O isotopic compositions of magnetite,apatite,clinopyroxene,and plagioclase of different types of ores from the three intrusions are analyzed using a technique of stepwise heating mass spectrometer to evaluate the role of wall rocks in the formation of Fe-Ti oxide *** released from magnetite are composed mainly of H 2 O and CO 2,whereas the other minerals are composed mainly of H 2 O,CO 2 and H *** 800-1200°C temperature interval,the average 13 C values of CO 2 of all the minerals from the three intrusions range from 7.7‰ to 13.5‰ and the average 18 O CO 2 values from 19.1‰ to 19.5‰,which are scattered in a mixed field with basalt and the two types of wall rocks as end-members,indicating that CO 2 from the wall rocks may have been involved in the magmas from which the three intrusions *** 400-800 C temperature interval,both 13 C values(13.7‰ to 17.9‰ on the average) and 18 O values(16.2‰ to 19.2‰ on the average) of CO 2 of all the minerals are lower than those for 800-1200 C temperature interval,and much closer to the values of the wall *** H 2 O released at the 400-800 C temperature interval has relatively low D values ranging from 90‰ to 115‰,also indicating the involvement of fluids from the wall *** average bulk contents of volatiles released from magnetite of the Hongge,Baima,and Panzhihua intrusions are 4891,2996,and 1568 mm 3 STP/g,respectively,much higher than those released from other minerals in total,which are 382

关键词： magnetite volatiles C-H-O isotope Fe-Ti-V oxide ore Panxi region

Neural plasticity in Parkinson's disease:a neuroimaging perspective

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Neural Regeneration Research 2024年第6期19卷 1203-1205页

作者： christina Andica Koji Kamagata Department of Radiology Juntendo University Graduate School of MedicineTokyoJapan Faculty of Health Data Science Juntendo UniversityChibaJapan

Parkinson's disease(PD)is a progressive neurodegenerative disorder characterized primarily by classical motor signs of bradykinesia,rigidity,tremors,and postural instability usually manifesti ng unilate rally or at least *** disease involves a loss of dopaminergic neurons projecting from the substantia nigra pars compacta to the dorsal striatum.

关键词： rigidity tremor primarily

Contrasting oxidation states of low-Ti and high-Ti magmas control Ni-Cu sulfide and Fe-Ti oxide mineralization in Emeishan Large Igneous Province

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Geoscience Frontiers 2022年第6期13卷 41-58页

作者： Yonghua Cao christina Yan Wang Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring Ministry of EducationSchool of Geosciences and Info-PhysicsCentral South UniversityChangsha 410083China Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China CAS Center for Excellence in Deep Earth Science Guangzhou 510640China Guangdong Provincial Key Laboratory of Mineral Physics and Materials Guangzhou 510640China

Magmatic Ni-Cu-(PGE) sulfide and Fe-Ti oxide deposits in plume-related large igneous provinces(LIPs)are commonly related to low-Ti and high-Ti series magmas, respectively, but the major factors that control such a relationship of metallogenic types and magma compositions are unclear. Magma fOcontrols sulfur status and relative timing of Fe-Ti oxide saturation in mafic magmas, which may help clarify this issue. Taking the Emeishan LIP as a case, we calculated the magma fOof the high-Ti and low-Ti picrites based on the olivine-spinel oxygen barometer, and the partitioning of V in olivine. The obtained fOof the high-Ti series magma(FMQ + 1.1 to FMQ + 2.6) is higher than that of the low-Ti series magma(FMQ-0.5to FMQ + 0.5). The magma fOof the high-Ti and low-Ti picrites containing Fo > 90 olivine reveals that the mantle source of the high-Ti series is likely more oxidized than that of the low-Ti series. The results using the ’lambda REE’ approach show that the high-Ti series may have been derived from relatively oxidized mantle with garnet pyroxenite component. The S contents at sulfide saturation(SCSS) of the two series magmas were calculated based on liquid compositions obtained from the alpha Melts modeling, and the results show that the low-Ti series magma could easily attain the sulfide saturation as it has low fOwith S being dominantly as S. In contrast, the oxidized high-Ti series magma is difficult to attain the sulfide saturation, but could crystallize Fe-Ti oxides at magma MgO content of ~7.0 wt.%. Thus, contrasting magma fOof low-Ti and high-Ti series in plume-related LIPs may play an important role in producing two different styles of metallogeny.

关键词： Emeishan large igneous province Mantle plume High-Ti and low-Ti series magma Magma oxygen fugacity Magmatic Fe-Ti oxide deposits Magmatic Ni-Cu-(PGE)deposits

A NEW BOUNDARY CONDITION FOR RATE-TYPE NON-NEWTONIAN DIFFUSIVE MODELS AND THE STABLE MAC SCHEME

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Journal of Computational Mathematics 2018年第4期36卷 605-626页

作者： Kun Li Youngju Lee christina Starkey BGP R&D Center CNPC Beijing 100871 China Department of Mathematics Texas State University San Marcos TX 78666 USA

We present a new Dirichlet boundary condition for the rate-type non-Newtonian diffusive constitutive models. The newly proposed boundary condition is compared with two such well-known and popularly used boundary conditions as the pure Neumann condition and the Dirichlet condition by Sureshkumar and Beris. Our condition is demonstrated to be more stable and robust in a number of numerical test cases. A new Dirichlet boundary condition is implemented in the framework of the finite difference Marker and Cell （MAC） method. In this paper, we also present an energy-stable finite difference MAC scheme that preserves the positivity for the conformation tensor and show how the addition of the diffusion helps the energy-stability in a finite difference MAC scheme-setting.

关键词： Boundary Conditions Diffusive Complex Fluids models Positivity preserving schemes Stability of the MAC schemes

Standardisation and Benchmarking for Improving Translator Training

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中国翻译 2012年第6期33卷 37-45页

作者： christina Schaffner Aston University Birmingham UK

过去十年,在高等院校尤其是研究生层次,译员培训课程数量增长巨大。这些课程面临的挑战是,要确保毕业生在瞬息万变的市场中能胜任各行各业翻译的需要。本文主要谈到下列问题:这些高校如何使译员培训课程适应快速变化的行业以及随之而来... 详细信息

过去十年,在高等院校尤其是研究生层次,译员培训课程数量增长巨大。这些课程面临的挑战是,要确保毕业生在瞬息万变的市场中能胜任各行各业翻译的需要。本文主要谈到下列问题:这些高校如何使译员培训课程适应快速变化的行业以及随之而来的行规的改变?一方面,行业要求毕业生要具有实际的职业技能,另一方面,高校要求毕业生要具有一定深度的学术修养和知识技能,如何将二者协调?有哪些合适的标准和尺度来确保译员培训的质量?本文最后讨论了EMT(欧洲翻译硕士)译员能力行规对高校译员培训课程带来哪些挑战。

关键词：译员培训尺度行规

Modeling nonstationary extreme wave heights in present and future climates of Greek Seas

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Water Science and Engineering 2016年第1期9卷 21-32页

作者： Panagiota Galiatsatou christina Anagnostopoulou Panayotis Prinos Hydraulics Laboratory Division of Hydraulics and Environmental Research Department of Civil Engineering Aristotle University of Thessaloniki Department of Meteorology and Climatology School of Geology Aristotle University of Thessaloniki

In this study the generalized extreme value （GEV） distribution function was used to assess nonstationarity in annual maximum wave heights for selected locations in the Greek Seas, both in the present and future climates. The available significant wave height data were divided into groups corresponding to the present period （1951-2000）, a first future period （2001-2050）, and a second future period （2051-2100）. For each time period, the parameters of the GEV distribution were specified as functions of time-varying covariates and estimated using the conditional density network （CDN）. For each location and selected time period, a total number of 29 linear and nonlinear models were fitted to the wave data, for a given combination of covariates. The covariates used in the GEV-CDN models consisted of wind fields resulting from the Regional Climate Model version 3 （RegCM3） developed by the International Center for Theoretical Physics （ICTP） with a spatial resolution of 10 km ×10 km, after being processed using principal component analysis （PCA）. The results obtained from the best fitted models in the present and future periods for each location were compared, revealing different patterns of relationships between wind components and extreme wave height quantiles in different parts of the Greek Seas and different periods. The analysis demonstrates an increase of extreme wave heights in the first future period as compared with the present period, causing a significant threat to Greek coastal areas in the North Aegean Sea and the Ionian Sea.

关键词： Wave extremes Climate change Nonstationarity GEV-CDN Principal component analysis