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国际医学放射学杂志 2015年第5期 509-510页

作者： M.H.Albrecht j.E.Scholtz j.kraft R.W.Bauer M.Kaup P.Dewes 叶露 Department of Diagnostic and Interventional Radiology University Hospital Frankfurt

摘要目的确定双能量CT（DECT）有关头颈部鳞状细胞癌（SCC）病人在高能级单能量（Mono+）中的最佳ke V值。方法对44例[男34例,女10例,平均年龄（55.5±16.0）岁]经组织病理学确诊为头颈部SCC病人的DECT影像进行重建,按照40 ke V、55 ke ... 详细信息

摘要目的确定双能量CT（DECT）有关头颈部鳞状细胞癌（SCC）病人在高能级单能量（Mono+）中的最佳ke V值。方法对44例[男34例,女10例,平均年龄（55.5±16.0）岁]经组织病理学确诊为头颈部SCC病人的DECT影像进行重建,按照40 ke V、55 ke V、70 ke V Mono+和M0.3（30%80 k V）线性混合分组。测量肿瘤、胸锁乳突肌、颈内静脉、下颌下腺和

关键词：头颈肿瘤 CT 病理学确诊颈内静脉下颌下腺噪声比衰减值放射科医师文载 Radiol

Experimental and analytical investigation on friction resistance force between buried coated pressurized steel pipes and soil

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Frontiers of Structural and Civil Engineering 2024年第4期18卷 615-629页

作者： Shaurav ALAM Tanvir MANZUR john MATTHEWS Chris BARTLETT Erez ALLOUCHE Brent KEIL john kraft Department of Civil Engineering and Construction Engineering Technology Louisiana Tech UniversityRustonLA 71270USA Department of Civil Engineering Bangladesh University of Engineering and TechnologyDhaka 1000Bangladesh Georgia Tech Research Institute AtlantaGA 30332USA Stantec Inc. Edmonton T5J0K4Canada North West Pipe Company VancouverWA 98684USA

This paper presents an analytical approach for estimating frictional resistance to pipe movement at soil and external pipe surface of buried coated pressurized steel pipes relative to the internal thrust *** proposed analytical method was developed based on 36 experiments,which involved three coating types(cement mortar(CM),polyurethane type-I(PT-I),prefabricated plastic tape(PPT))on pipes’surfaces,three different soils(pea-gravel(PG),sand(S),silty-clay(SC)),and four simulated over burden depths above the pipe’s *** showed frictional resistance decreased with increasing over burden depth above the pipe’s *** degree of frictional resistance at the pipe-soil interface was found to be in the order of PG>SC>S for all coating variations and overburden *** coated pipe buried in all three types of soil produced significantly higher frictional resistance as compared to other coating *** on experimental data,the developed analytical introduced a dimensionless factor“Z”,which included effects of types of coatings,soil,and overburden depths for simplified rapid *** showed that the method provided a better prediction of frictional resistance forces,in comparison to previous analytical methods,which were barely close in predicting friction resistance for different coating variations,soil types,and overburden *** resistance force values reported herein could be considered conservative.

关键词： friction resistance force thrust force coated pressurized steel pipe soil type overburden depth

Optimal Placement of Phasor Measurement Unit in Smart Grids Considering Multiple Constraints

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journal of Modern Power Systems and Clean Energy 2023年第2期11卷 479-488页

作者： Tengpeng Chen He Ren Yuhao Sun Markus kraft Gehan A.j.Amaratunga Department of Instrumental and Electrical Engineering Xiamen UniversityXiamenChina Shenzhen Research Institute of Xiamen University ShenzhenChina CTC Intelligence(Shenzhen)Technology Co. Ltd.ShenzhenChina Department of Chemical Engineering and Biotechnology University of CambridgeCambridgeUK Cambridge Centre for Advanced Research and Education in Singapore CREATE TowerSingapore School of Chemical and Biomedical Engineering Nanyang Technological UniversitySingapore Department of Engineering University of CambridgeUK

The distribution of measurement noise is usually assumed to be Gaussian in the optimal phasor measurement unit(PMU)placement(OPP)***,this is not always accurate in *** paper proposes a new OPP method for smart grids in which the effects of conventional measurements,limited channels of PMUs,zero-injection buses(ZIBs),single PMU loss contingency,state estimation error(SEE),and the maximum SEE variance(MSEEV)are *** SEE and MSEEV are both obtained using a robust t-distribution maximum likelihood estimator(MLE)because t-distribution is more flexible for modeling both Gaussian and non-Gaussian *** A-and G-optimal experimental criteria are utilized to form the SEE and MSEEV *** allows the optimization problem to be converted into a linear objective function subject to linear matrix inequality observability *** performance of the proposed OPP method is verified by the simulations of the IEEE 14-bus,30-bus,and 118-bus systems as well as the 211-bus practical distribution system in China.

关键词： Phasor measurement unit(PMU) smart grids optimal placement state estimation(SE).

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OntoPowSys: A power system ontology for cross domain interactions in an eco industrial park

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能源与人工智能(英文) 2020年第1期1卷 87-104页

作者： Aravind Devanand Gourab Karmakar Nenad Krdzavac Remy Rigo-Mariani YSFoo Eddy Iftekhar AKarimi Markus kraft Department of Chemical and Biomolecular Engineering National University of SingaporeEngineering Drive 4117585Singapore Cambridge Centre for Advanced Research and Education in Singapore(CARES) CREATE Tower1 Create Way138602Singapore Department of Chemical Engineering and Biotechnology University of CambridgePhilippa Fawcett DriveWest SiteCambridge CB30ASUK School of Chemical and Biomedical Engineering Nanyang Technological University62 Nanyang Drive637459Singapore School of Electrical and Electronic Engineering Nanyang Technological University 50 Nanyang Avenue639798Singapore Univ.Grenoble Alpes CNRSGrenoble INPG2Elab

Knowledge management in multi-domain,heterogeneous industrial networks like an Eco-Industrial Park(EIP)is a challenging *** this paper,an ontology-based management system has been proposed for addressing this *** focuses on the power systems domain and provides a framework for integrating this knowledge with the other domains of an *** proposed ontology,OntoPowSys is expressed using a Description Logics(DL)syntax and the OWL2 language was used to make it *** is then used as a part of the Knowledge Management System(KMS)in a virtual EIP called the j-Park Simulator(jPS).The advantages of the proposed approach are demonstrated by conducting two case studies on the *** first case study illustrates the application of optimal power flow(OPF)in the electrical network of the *** second case study plays an important role in under-standing the cross-domain interactions between the chemical and electrical engineering domains in a bio-diesel plant of the *** case studies are available as web services on the jPS *** results showcase the advantages of using ontologies in the development of decision support *** tools are capable of taking into account contextual information on top of data during their decision-making *** are also able to exchange knowledge across different domains without the need for a communication interface.

关键词： Bio-diesel plant Description logic Eco-Industrial Park Industry 4.0 Knowledge base Knowledge graph Ontology Optimal power flow

Toward optical coherence tomography on a chip: in vivo three-dimensional human retinal imaging using photonic integrated circuit-based arrayed waveguide gratings

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Light(Science & Applications) 2021年第1期10卷 71-85页

作者： Elisabet A.Rank Ryan Sentosa Danielle j.Harper Matthias Salas Anna Gaugutz Dana Seyringer Stefan Nevlacsil Alejandro Maese-Novo Moritz Eggeling Paul Muellner Rainer Hainberger Martin Sagmeister jochen kraft Rainer ALeitgeb Wolfgang Drexler Center for Medical Physics and Biomedical Engineering Medical University of ViennaWaehringer Guertel 18-20/4 L1090 ViennaAustria Research Centre for Microtechnology Vorarlberg University of Applied SciencesHochschulstrasse 16850 DornbirnAustria AIT Austrian Institute of Technology GmbH Gieffinggasse 41210 ViennaAustria ams AG Tobelbader Strasse 308141 PremstaettenAustria

In this work,we present a significant step toward in vivo ophthalmic optical coherence tomography and angiography on a photonic integrated *** diffraction gratings used in spectral-domain optical coherence tomography can be replaced by photonic integrated circuits comprising an arrayed waveguide *** arrayed waveguide grating designs with 256 channels were tested,which enabled the first chip-based optical coherence tomography and angiography in vivo three-dimensional human retinal *** 1 supports a bandwidth of 22nm,with which a sensitivity of up to 91 dB(830μW) and an axial resolution of 10.7 pm was *** 2 supports a bandwidth of 48 nm,with which a sensitivity of 90 dB(480μW) and an axial resolution of 6.5μm was *** silicon nitride-based integrated optical waveguides were fabricated with a fully CMOS-compatible process,which allows their monolithic co-integration on top of an optoelectronic silicon *** a benchmark for chip-based optical coherence tomography,tomograms generated by a commercially available clinical spectral-domain optical coherence tomography system were compared to those acquired with on-chip *** similarities in the tomograms demonstrate the significant clinical potential for further integration of optical coherence tomography on a chip system.

关键词： waveguide arrayed optical

Beyond cotton and polyester: An evaluation of emerging feedstocks and conversion methods for the future of fashion industry

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journal of Bioresources and Bioproducts 2024年第2期9卷 130-159页

作者： Ryen M.Frazier Keren A.Vivas Ivana Azuaje Ramon Vera Alonzo Pifano Naycari Forfora Hasan jameel Ericka Ford joel j.Pawlak Richard Venditti Ronalds Gonzalez Department of Forest Biomaterials North Carolina State UniversityRaleighNC 27695USA Department of Textile Engineering Chemistry and ScienceThe Nonwovens InstituteNorth Carolina State UniversityRaleighNC 27695USA

As the global population grows,the demand for textiles is increasing ***,this puts immense pressure on manufacturers to produce more *** synthetic fibers can be pro-duced cheaply,they have a negative impact on the *** the other hand,fibers from wool,sisal,fique,wood pulp(viscose),and man-made cellulose fibers(MMCFs)from cotton can-not alone meet the growing fiber demand without major stresses on land,water,and existing markets using these *** a greater emphasis on transparency and circular economy practices,there is a need to consider natural non-wood alternative sources for MMCFs to supple-ment other fiber ***,introducing new feedstocks with different compositions may require different biomass conversion ***,based on existing work,this review ad-dresses the technical feasibility of various alternative feedstocks for conversion to textile-grade ***,alternative feedstocks are introduced,and then conventional(dissolving pulp)and emerging(fibrillated cellulose and recycled material)conversion technologies are evaluated to help select the most suitable and promising processes for these emerging alternative sources of *** is important to note that for alternative feedstocks to be adopted on a meaningful scale,high biomass availability and proximity of conversion facilities are critical *** North America,soybean,wheat,rice,sorghum,and sugarcane residues are widely available and most suitable for conventional conversion through various dissolving pulp production methods(pre-hydrolysis kraft,acid sulfite,soda,SO2-ethanol-water,and potassium hydroxide)or by emerging cellulose fibrillation *** dissolving pulp conversion is well-established,fibrillated cel-lulose methods could be beneficial from cost,efficiency,and environmental ***,the authors strongly encourage more work in this growing research ***,conducting thorough cost and sustainability assessment

关键词： Non-wood Residue Regenerated cellulose Dissolving pulp Man-made cellulose fiber Apparel textile

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泥土对海浪的响应

水利水电科技进展 1988年第S2期 43-59页

作者： L.M.kraft j.N.Suhayada j.E:Marin S.C.Helfrich 汤君久

波浪引起的底部压变力化能造泥土运动,尤其是在松软的三角洲沉积物中,它影响着近海装备的没计和实施。包括波浪—海底相互作用的一个分层的粘弹性模型,被用来进行波浪衰减,波高,波周期,水深与泥土性质等对泥土运动的和波浪和泥床运动之... 详细信息

波浪引起的底部压变力化能造泥土运动,尤其是在松软的三角洲沉积物中,它影响着近海装备的没计和实施。包括波浪—海底相互作用的一个分层的粘弹性模型,被用来进行波浪衰减,波高,波周期,水深与泥土性质等对泥土运动的和波浪和泥床运动之间相位差的影响参数研究。用一个实例表明由周期性荷载引起的,对泥土阻力的降低影响。分析适合于密西西比三角洲的典型条件。本文中提出的结果将有助于海洋学家、土工工程师和结构设计人员建立一个关于初步设计准则的和缩小去选择最终设计准则所需要分析数字的合理范围。

关键词：水深相位差波浪作用海床波周期水文要素波浪衰减

Harmonic aspects of wind power integration

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journal of Modern Power Systems and Clean Energy 2013年第1期1卷 14-21页

作者： Math H.j.BOLLEN Kai YANG Electric Power Engineering Lulea University of Technology93187 SkellefteaSweden

This paper discusses a number of ways in which wind power installations can impact the harmonic levels in the power *** turbines are an additional source of harmonic emission,especially when it concerns"non-characteristic harmonics."Parallel resonances can amplify the emission from individual turbines.A mathematical model is developed to quantify this *** resonances can result in high currents,driven by the background voltage distortion in the transmission grid,flowing into thewind *** of the transmission grid will increase lower order harmonics but reduce higher order harmonics.

关键词： Power quality Power system harmonics Wind power

横波弹性成像能否鉴别儿童梗阻性肾积水与非梗阻性肾积水?

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国际医学放射学杂志 2015年第6期 590-591页

作者： j.R.Dillman E.A.Smith M.S.Davenport M.A.DiPietro R.Sanchez K.H.kraft 谢双双 Section of Pediatric Radiology Department of RadiologyUniversity of Michigan Health System

摘要目的探讨以利尿性肾脏成像为标准,注射利尿剂前后超声。材料与方法本前瞻性横断面盲性对比研究经伦理委员会批准,获得父母知情同意,并符合HIPAA。2012年

关键词：非梗阻性弹性成像伦理委员会肾积水知情同意中位值泌尿系梗阻参照标准诊断效能核素显像