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Smart Grid and Renewable Energy 2022年第10期13卷 223-234页

作者： marcel Hamda Soulouknga Abraham Dandoussou Noel Djongyang Higher Normal School of Technical Education of Sarh University of Sarh Sarh Chad Department of Electrical and Power Engineering Higher Technical Teachers’ Training School University of Buea Kumba Cameroon Department of Renewable Energy National Advanced Polytechnic School University of Maroua Maroua Cameroon

The global sustainability plan for future development relies on solar radiation which is the main source of renewable energy. Thus, this work studies the performance of six models to estimate global solar radiation on a horizontal surface for the Abeche site in Chad. The data used in this work were collected at the General Directorate of National Meteorology of Chad. The reliability and accuracy of different models for estimating global solar radiation were validated by statistical indicators to identify the most accurate model. The results show that among all the models, the Sabbagh model has the best performance in estimating the global solar radiation. The average is 6.354 kWh/m2 with an average of -3.704%. This model is validated against NASA data which is widely used.

关键词： Empirical Models Statistical Indicators Solar Radiation Abeche

Development and Extension of An Aggregated Scale Model:Part 2-Extensions to ASMITA

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China Ocean Engineering 2016年第5期30卷 651-670页

作者： Ian TOWNEND Zheng Bing WANG marcel STIVE Zeng ZHOU University of Southampton Southampton S0171B JUK TU Delft Delft 2600 AAThe Netherlands Deltares Delft 2600 MHThe Netherlands Jiangsu Key Laboratory of Coast Ocean Resources Development and Environment Security Hohai UniversityNanjing 210098China

Whilst much attention has been given to models that describe wave, tide and sediment transport processes in sufficient detail to determine the local changes in bed level over a relatively detailed representation of the bathymetry, far less attention has been given to models that consider the problem at a much larger scale （e.g. that of geomorphological elements such as a tidal flat and tidal channel）. Such aggregated or lumped models tend not to represent the processes in detail but rather capture the behaviour at the scale of interest. One such model developed using the concept of an equilibrium concentration is the Aggregated Scale Morphological Interaction between Tidal basin and Adjacent coast （ASMITA）. In a companion paper （Part 1）, we detail the original model and provide some new insights into the concepts of equilibrium, and horizontal and vertical exchange that are key components of this modelling approach. In this paper, we summarise a range of developments that have been undertaken to extend the original model concept, to illustrate the flexibility and power of the conceptual framework. However, adding detail progressively moves the model in the direction of the more detailed process-based models and we give some consideration to the boundary between the two.

关键词： estuary tidal inlet morphology tides waves sediment transport

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不羁漫游在奇境中

设计 2013年第5期26卷 120-127页

作者： Emma marcel Wanders

跻身“世界五十大设计巨星”之一的荷兰设计师马塞尔·万德斯对设计领域几乎无不染指，从家具、电器、室内装潢到建筑，从一分钟做出来的即兴艺术到把自己的女友悬挂在吊灯上倒香槟，马塞尔强烈的个人风格诗意大胆甚至疯狂，称其为雅痞... 详细信息

跻身“世界五十大设计巨星”之一的荷兰设计师马塞尔·万德斯对设计领域几乎无不染指，从家具、电器、室内装潢到建筑，从一分钟做出来的即兴艺术到把自己的女友悬挂在吊灯上倒香槟，马塞尔强烈的个人风格诗意大胆甚至疯狂，称其为雅痞设计师，实不为过。

关键词：漫游设计师室内装潢个人风格塞尔

Development and Extension of An Aggregated Scale Model: Part 1–Background to ASMITA

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China Ocean Engineering 2016年第4期30卷 483-504页

作者： Ian TOWNEND Zheng Bing WANG marcel STIVE Zeng ZHOU University of Southampton Southampton S0171B JUK TU Delfl Delft 2600.44The Netherlands Deltares Delft 2600 MHThe Netherlands Jiangsu Key Laboratory of Coast Ocean Resources Development and Environment Security Hohai UniversityNanjing 210098China

Whilst much attention has been given to models that describe wave, tide and sediment transport processes in sufficient detail to determine the local changes in bed level over a relatively detailed representation of the bathymetry, far less attention has been given to models that consider the problem at a much larger scale （e.g. that of geomorphological elements such as a tidal fiat and tidal channel）. Such aggregated or lumped models tend not to represent the processes in detail but rather capture the behaviour at the scale of interest. One such model developed using the concept of an equilibrium concentration is the Aggregated Scale Morphological Interaction between Tidal basin and Adjacent coast （ASMITA）. In this paper we provide some new insights into the concepts of equilibrium, and horizontal and vertical exchange that are key components of this modelling approach. In a companion paper, we summarise a range of developments that have been undertaken to extend the original model concept, to illustrate the flexibility and power of the conceptual framework. However, adding detail progressively moves the model in the direction of the more detailed process-based models and we give some consideration to the boundary between the two.

关键词： estuary tidal inlet morphology tides waves sediment transport

Symposium“How to track wild animals without disturbance and subsequent bias”

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Integrative Zoology 2019年第1期14卷 2-3页

作者： Yvon Le Maho marcel Holyoak Institut Pluridisciplinaire Hubert Curien Strasbourg France University of California Davis DavisUSA

Two major steps in field studies of wild animals have been their tagging and,more recently,their instrumen-tation with transmitters and *** the contribution of both to our scientific knowledge is immense,the extent to which the data are reliable and therefore unbi-ased is however generally ***,there is now evidence that,even in trained animals,human presence induces a long-lasting stress which is aggravated by capture and handling in order to either attach or recover the instruments,or to take biological ***,attached tags and loggers result in a disturbance,partic-ularly for aquatic animals due to the increased drag in *** determine the relative and overall impact of such disturbances and therefore to select or develop the best possible new instrumentation,it is obviously necessary to get data on undisturbed control animals or at least evaluate the magnitude of the effects of distur-bance on the parameters of interest.

关键词： disturbance subsequent instru

焊接结构接头处损伤评估的高循环疲劳分析方法的选择原则

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Journal of Marine Science and Application 2022年第4期21卷 116-133页

作者： Skirmantas Pargalgauskas Xiaoli Jiang marcel Edelkamp Dingena Schott Department of Maritime and Transport Technology Delft University of TechnologyDelft 2628CDNetherlands In Summa Inovation B.V. Raamsdonksveer 4941VVNetherlands

The main purpose of this paper is to provide a summarized general guideline to aid decision making of choosing the type of fatigue analysis approach,best suited for modelling and evaluating high-cycle fatigue damage in welded structural *** describes how addition of stress concentration and stress direction information into fatigue assessment methodology affect simulated fatigue damage accumulation results and when it is beneficial or necessary to use a particular fatigue damage estimation *** focus is on stress-life curve based approaches,particularly when deciding between variants of nominal,hot-spot or multiaxial fatigue assessment approaches for evaluating fatigue damage within welded joint *** is illustrated through application of proposed methodology to choose and perform fatigue assessment for a non-conventional load-bearing tubular joint structure within a floating lemniscate crane upper arm,which has been observed of being prone to aggressive crack propagation within its *** within the structure is estimated using two non-optimal fatigue analysis approaches to verify applicability of proposed selection *** are then summarized through comparative assessment and findings are discussed based on what leads to result changes within each fatigue damage analysis approach.

关键词： Fatigue analysis Multiaxial fatigue Hot-spot fatigue Methodology Welded joints

Development of a fast and precise method for simultaneous quantification of the PLGA monomers lactic and glycolic acid by HPLC

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Journal of Pharmaceutical Analysis 2019年第2期9卷 100-107页

作者： marcel Pourasghar Aljoscha Koenneke Peter Meiers Marc Schneider Department of Pharmacy Biopharmaceutics and Pharmaceutical TechnologySaarland University

Poly(lactide-co-glycolide acid)(PLGA) is an extraordinary well-described polymer and has excellent pharmaceutical properties like high biocompatibility and good biodegradability. Hence, it is one of the most used materials for drug delivery and biomedical systems, also being present in several US Food and Drug Administration-approved carrier systems and therapeutic devices. For both applications, the quantification of the polymer is inalienable. During the development of a production process, parameters like yield or loading efficacy are essential to be determined. Although PLGA is a well-defined biomaterial,it still lacks a sensitive and convenient quantification approach for PLGA-based systems. Thus, we present a novel method for the fast and precise quantification of PLGA by RP-HPLC. The polymer is hydrolyzed into its monomers, glycolic acid and lactic acid. Afterwards, the monomers are derivatized with the absorption-enhancing molecule 2,4′-dibromoacetophenone. Furthermore, the wavelength of the derivatized monomers is shifted to higher wavelengths, where the used solvents show a lower absorption,increasing the sensitivity and detectability. The developed method has a detection limit of 0.1 mg/mL,enabling the quantification of low amounts of PLGA. By quantifying both monomers separately, information about the PLGA monomer ratio can be also directly obtained, being relevant for degradation behavior. Compared to existing approaches, like gravimetric or nuclear magnetic resonance measurements, which are tedious or expensive, the developed method is fast, ideal for routine screening, and it is selective since no stabilizer or excipient is interfering. Due to the high sensitivity and rapidity of the method, it is suitable for both laboratory and industrial uses.

关键词： Poly(lactide-co-glycolide acid)(PLGA) Alkaline hydrolysis Quantification Drug delivery system RP-HPLC

Robust reconstruction of curved line structures in noisy point clouds

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Visual Informatics 2021年第3期5卷 1-14页

作者： marcel Ritter Daniel Schiffner Matthias Harders Interactive Graphics and Simulation Group Department of Computer ScienceUniversity of InnsbruckAustria Airborne Hydromapping GmbH InnsbruckAustria DIPF|Leibniz Institute for Research and Information Education FrankfurtGermany

Point-based geometry representations have become widely used in numerous contexts,ranging from particle-based simulations,over stereo image matching,to depth sensing via light detection and *** application focus is on the reconstruction of curved line structures in noisy 3D point cloud *** algorithms operating on such point clouds often rely on the notion of a local *** the latter,our approach employs multi-scale neighborhoods,for which weighted covariance measures of local points are *** line structures are reconstructed via vector field tracing,using a bidirectional piecewise streamline *** also introduce an automatic selection of optimal starting points via multi-scale geometric *** pipeline development and choice of parameters was driven by an extensive,automated initial analysis process on over a million prototype test *** behavior of our approach is controlled by several parameters—the majority being set automatically,leaving only three to be controlled by a *** an extensive,automated final evaluation,we cover over one hundred thousand parameter sets,including 3D test geometries with varying curvature,sharp corners,intersections,data holes,and systematically applied varying types of ***,we analyzed different choices for the point of reference in the co-variance computation;using a weighted mean performed best in most *** addition,we compared our method to current,publicly available line reconstruction *** to thirty times faster execution times were achieved in some cases,at comparable error ***,we also demonstrate an exemplary application on four real-world 3D light detection and ranging datasets,extracting power line cables.

关键词： Computational geometry Noisy point clouds Line reconstruction Automatic Adaptive control

An integrated suspended sediment transport monitoring and analysis concept

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International Journal of Sediment Research 2014年第2期29卷 135-148页

作者： Marlene HAIMANN marcel LIEDERMANN Petra LALK Helmut HABERSACK Christian Doppler Laboratory for Advanced Methods in River Monitoring Modelling and EngineeringInstitute of Water ManagementHydrology and Hydraulic Engineering Department of WaterAtmosphere and EnvironmentBOKU-University of Natural Resources and Life SciencesVienna

A new integrated suspended sediment monitoring strategy applying direct and indirect technologies is *** sensors continuously record the turbidity at one point in the channel cross section close to the river bank and are calibrated by water samples taken close to the *** measurements are performed to establish the distribution of suspended sediment in a cross section(bottle samples combined with acoustic devices).Using correction factors(probe and cross-sectional factor) these monitoring methods are combined and it is,thus,possible to fully document the temporal and spatial variability of the suspended sediment transport and to estimate the suspended sediment load for certain time *** monitoring strategy was implemented at various measurement sites in Austria as well as at the Hainburg Road Bridge site on the Danube *** has already been successfully applied for three years at this measurement site and suspended sediment loads during high discharges up to a 15 year flood event have been *** evaluate the new monitoring methods the results were compared with load estimation methods found in the literature including averaging and ratio estimators as well as rating *** results prove that with the new methodology,the temporal variability of the suspended sediment transport can be detected more accurately compared with the other *** also demonstrate that the additional consideration of the spatial distribution of the suspended sediment concentration in the cross section is crucial as the mean concentration in the cross section can significantly exceed the concentration near the banks,especially at large rivers like the Danube River.

关键词： Suspended sediment Integrated suspended sediment monitoring programme Turbidity sensor Acoustic devices Load estimates

Jasmonates differentially affect interconnected signal-transduction pathways of Pieris rapae-induced defenses in Arabidopsis thaliana

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Insect Science 2011年第3期18卷 249-258页

作者： Tjeerd A.L. Snoeren Colette Broekgaarden marcel Dicke Laboratory of Entomology Wageningen UniversityWageningen University and Research Centre 6708PB Wageningen the Netherlands Plant Research International Wageningen University and Research Centre 6708PB Wageningen the Netherlands

The jasmonic acid （JA） pathway is the main signal-transduction pathway induced by insect folivory. Mutant plants affected in the jasmonate pathway （18：0 and/or 16：0-oxylipin routes） were studied to assess the effects of JA and its oxylipin intermediates 12-oxophytodienoic acid （OPDA） and dinor-OPDA （dnOPDA） on interconnected signal- transduction pathways that underlie induced defenses in Arabidopsis. Our data show that the oxylipin jasmonates dnOPDA, OPDA and JA have different roles in defense signaling induced after feeding by the chewing-biting caterpillar Pieris rapae. Jasmonic acid, and not OPDA or dnOPDA, is the major signaling compound required for the induction of the defense-related genes LOX2 （Lipo：~vgenase 2）, OPR3 （12-Oxophytodienoate reductase 3）, ACX1 （Acyl-CoA oxidase 1） and PAL1 （Phenvlalanine ammonia-lyase 1）. Monitoring PAL1 transcript levels clearly showed that accumulation of JA upon P rapae feeding results in the induction of the salicylic acid pathway. Furthermore, JA is the major signaling compound required for the P rapae-induced expression of the defense-related gene HPL1 （Hydroperoxide lyase 1）. The jasmonate dnOPDA influences the induction of the HPk- branch as well, yet its effect is antagonistic to the effect of JA. Our data show that these jasmonates may be used to fine-tune Arabidopsis＇ herbivore-induced responses in terms of the HPL-branch from the oxylipin pathway.

关键词： gene transcript level herbivory Lepidoptera mutants oxylipin qRT-PCR