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Journal of Modern Power Systems and Clean Energy 2019年第1期7卷 1-8页

作者： Xinyu CHEN Michael b.MCELROY Qiuwei wU Yinbiao SHU Yusheng XUE John A.Paulson School of Engineering and Applied Sciences Harvard University Department of Electrical Engineering Technical University of Denmark State Grid Corporation of China State Grid Electric Power Research Institute

Investment for renewables has been growing rapidly since the beginning of the new century, and the momentum is expected to sustain in order to mitigate the impact of anthropogenic climate *** towards higher renewable penetration in the power industry will not only confront technical challenges, but also face socio-economic *** connected between environment and energy systems are also tightened under elevated penetration of *** paper will provide an overview of some important challenges related to technical, environmental and socio-economic aspects at elevated renewable *** integrated analytical framework for interlinked technical, environmental and socio-economic systems will be presented at the end.

关键词： wind power Solar power Integrated energy systems Missing money problem Low carbon policies

A New Synthesis Reaction of Nano-TiC Powder from Titanium and Graphite Fluorinate Powder Mixture

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A New Synthesis Reaction of Nano-TiC Powder from Titanium an...

Diversity and Structure of the woody Stand in a Sudano-Sahelian Transition Zone in Senegal

中国化学会第八届全国物理无机化学学术会议

作者： Y.H.Yu R Chang b.w.Yang C.Z.Yao Department of Chemistry Yun Cheng University

by employing graphite fluorides with different structural types(CF)(sub x=0.3, 0.4, 0.5, 0.6, 0.8, 1.0) and titanium metallic powder as the starting materials, we developed a novel, straightforward topotactic route to...

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The Special Column of Aquatic Invasive Species Science

Open Journal of Ecology（生态学期刊） 2024年第1期

作者： Oumar Sarr Moustapha b. Sagna Amy bakhoum Sékouna Diatta Aliou Guissé

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Current Zoology 2011年第6期57卷 816-817页

作者： Gerard van der Velde Rob S.E.w. Leuven Guest Editors Radboud University Nijmegen Institute for Water and Wetland Research P.O. Box 9010 6500 GL Nijmegen The Netherlands

we were delighted when Zhi-Yun Jia, Executive Editor of Current Zoology, approached us with a proposal to engage in a special column on invasive species science. Six papers have been written for this special column, all containing new information and approaches in the field of aquatic invasive species science. Each paper has gone through the rigorous peer review process used at Current Zoology, and Zhi-Yun Jia was very helpful by contacting reviewers and improving the manuscripts.

关键词：外来入侵物种科学水生同行评议动物

PARAMAGNETIC MEISSNER EFFECTS IN MELT-TEXTURED Y_(0.99)Nd_(0.01)ba_2Cu_3O_(7-y)SUPERCONDUCTOR

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Acta Metallurgica Sinica(English Letters) 2002年第3期15卷 295-298页

作者： Xing Y.T. wang Y.Z. Qiao G.w. Inst. of Metal Res. Chinese Acad. of Sci. Shenyang 110016 China

The paramagnetic Meissner effect (PME) was observed on the field-cooled M-T curves of melt-textured Y0.99Nd0.01ba2Cu3O7-y in applied magnetic fields from 1kOe to 40kOe. In the magnetic field below 1kOe, the sample undergoes the typical transition from the normal state to the superconducting state when it was cooled down. The applied magnetic fields in which the PME occurs, are very high compared with the fields reported in literatures. we propose that the occurrence of the PME may be due to a phase transition of flux vortices in the superconductors.

关键词： YbCO superconductor paramagnetic Meissner effect (PME)

Convergence Estimates for Some Regularization Methods to Solve a Cauchy Problem of the Laplace Equation

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Numerical Mathematics(Theory,Methods and Applications) 2011年第4期4卷 459-477页

作者： T.wei H.H.Qin H.w.Zhang School of Mathematics and Statistics Lanzhou UniversityP.R.China

In this paper,we give a general proof on convergence estimates for some regularization methods to solve a Cauchy problem for the Laplace equation in a rectangular *** regularization methods we considered are:a non-local boundary value problem method,a boundary Tikhonov regularization method and a generalized *** on the conditional stability estimates,the convergence estimates for various regularization methods are easily obtained under the simple verifications of some *** results for one example show that the proposed numerical methods are effective and stable.

关键词： Cauchy problem Laplace equation regularization methods convergence estimates

Transformer components impact on compatibility of measured PDs:comparison of IEC60270 and RF methods

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High Voltage 2019年第1期4卷 33-40页

作者： Keyvan Firuzi Mehdi Vakilian b.Toan Phung Trevor blackburn Electrical Engineering Department and Centre of Excellence in Power System Management and Control Sharif University of TechnologyTehranIran School of Electrical Engineering&Telecommunications University of New South WalesSydneyAustralia

Power transformer partial discharge signal measurement using Radio Frequency method has advantages over IEC 60270‘apparent charge’measurement method for online monitoring due to greater immunity against external ***,the lack of a well-defined calibration relationship between the two methods is main disadvantage of RF *** measurements,using these two methods,carried out on various transformer PD source models,in laboratory,to investigate main parameters that affect the relationship of results of these two *** this paper,factors that influence this relationship are classified into three groups:(i)type of PD sources,(ii)transformer windings as PD signal transmitter,and(iii)the inner structure of the ***,the relationship between these two methods has been investigated for some simple types of PD ***,by adding the winding structure model to the void,which is the PD source,its impact on each measurement method and the relationship between them have been *** impact of inner structure on the relation between the two methods is compensated through a formula which is proposed as a means for calibration of the RF partial discharge measurement *** to compensate for internal insulating system effects more research is required.

关键词： winding disadvantage adding

Exploring the Approaches to Data Flow Computing

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Computers, Materials & Continua 2022年第5期71卷 2333-2346页

作者： Mohammad b.Khan Abdul R.Khan Hasan Alkahtani Department of Electrical and Computer Engineering Technical University of MunichArcisstrasse 2180333 MunichGermany Department of Computer Science CCSITKing Faisal University31982Al AhsaKSA

Architectures based on the data flow computing model provide an alternative to the conventional Von-Neumann architecture that are widelyused for general purpose *** based on the data flow architecture employ fine-grain data-driven *** architectures have thepotential to exploit the inherent parallelism in compute intensive applicationslike signal processing,image and video processing and so on and can thusachieve faster throughputs and higher power *** this paper,severaldata flow computing architectures are explored,and their main architecturalfeatures are ***,a classification of the processors is presented based on whether they employ either the data flow execution modelexclusively or in combination with the control flow model and are accordinglygrouped as exclusive data flow or hybrid *** hybrid categoryis further subdivided as conjoint or accelerator-style architectures dependingon how they deploy and separate the data flow and control flow executionmodel within their execution ***,a brief comparison and discussionof their advantages and drawbacks is also *** this study weconclude that although the data flow architectures are seen to have maturedsignificantly,issues like data-structure handling and lack of efficient placementand scheduling algorithms have prevented these from becoming commerciallyviable.

关键词： Processor architecture data flow architectures Von-Neumann model control flow architectures

Analysis of monitored ground support and rock mass response in a longwall tailgate entry

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International Journal of Mining Science and Technology 2018年第1期28卷 43-51页

作者： G.S.Esterhuizen D.F.Gearhart I.b.Tulu NIOSH Pittsburgh Mining Research Division PittsburghPA 15236USA west Virginia University MorgantownWV 26506USA

A comprehensive monitoring program was conducted to measure the rock mass displacements, support response, and stress changes at a longwall tailgate entry in west *** was initiated a few days after development of the gateroad entries and continued during passage of the longwall panels on both sides of the *** included overcore stress measurements of the initial stress within the rock mass, changes in cable bolt loading, standing support pressure, roof deformation, rib deformation,stress changes in the coal pillar, and changes in the full three-dimensional stress tensor within the rock mass at six locations around the monitoring *** the passage of the first longwall, stress measurements in the rock and coal detected minor changes in loading while minor changes were detected in roof *** a result of the relatively favorable stress and geological conditions, the support systems did not experience severe loading or rock deformation until the second panel approached within 10–15 m of the instrumented *** reaching the peak loading at about 50–75 mm of roof sag, the cable bolts started to unload, and load was transferred to the standing *** standing support system was able to maintain an adequate opening inby the shields to provide ventilation to the first crosscut inby the face, as *** results were used to calibrate modeled cable bolt response to field data, and to validate numerical modeling procedures that have been developed to evaluate entry support *** is concluded that the support system was more than adequate to control the roof of the tailgate up to the longwall face *** monitoring results have provided valuable data for the development and validation of support design strategies for longwall tailgate entries.

关键词： Longwall mining Support Tailgate Monitoring Coal mining

Disagreement between symptom-reflux association analysis parameters in pediatric gastroesophageal reflux disease investigation

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world Journal of Gastroenterology 2010年第19期16卷 2401-2406页

作者： Samuel C Lüthold Mascha K Rochat Peter bhler Division of Gastroenterology Departement of Pediatrics Hospital of Fribourg CH-1708 Fribourg Switzerland Asthma and Allergy Research Group University of Munich Lindwurmstrasse 4 D 80337 Munich Germany

AIM: To assess the agreement within 3 commonly used symptom-reflux association analysis (SAA) parameters investigating gastroesophageal reflux disease (GERD) in infants. METHODS: Twenty three infants with suspected GERD were included in this study. Symptom index (SI), Symptom sensitivity index (SSI) and symptom association probability (SAP) related to cough and irritability were calculated after 24 h combined pH/multiple intraluminal impedance (MII) monitoring. Through defined cutoff values, SI, SSI and SAP values are differentiated in normal and abnormal, whereas abnormal values point towards gastroesophageal reflux (GER) as the origin of symptoms. we analyzed the correlation and the concordance of the diagnostic classification of these 3 SAA ***: Evaluating the GER-irritability association, SI, SSI and SAP showed non-identical classification of normal and abnormal cases in 39.2% of the infants. when irritability was taken as a symptom, there was only a poor inter-parameter association between SI and SSI, and between SI and SAP (Kendall’s tau b = 0.37, P b = 0.36, P wed non-identical classification of normal and abnormal cases in 52.2% of the patients. when cough was taken as a symptom, only SI and SSI showed a poor inter-parameter association (Kendall’s tau b = 0.33, P with pH/MII-monitoring, SI, SSI and SAP showed a poor inter-parameter association and important dis-agreements in diagnostic classification. These limitations must be taken into consideration when interpreting the results of SAA in infants.

关键词： Gastroesophageal reflux disease Infant Symptom-reflux association analysis Intraluminal impedance monitoring pH