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Architecture of Collaborating Frameworks：Simulation,Visualisation,User Interface and Analysis

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International Conference on Computing in High Energy and Nuclear Physics 2001年第1期 518-521页

作者： A.Pfeiffer R.Giannitrapani 等 cern，Geneva Switzerland UniversitadiUdineandINFNsezionediTrieste Italy

In modern high energy and astrophysics experiments the variety of user requirements and the complexity of the problem domain often involve the collaboration of several software frameworks,and different components are responsible for providing the functionalities related to each *** instance,a common use case consists in studying the physics effects and the detector performance,resulting from primary events,in a given detector configuration,to evaluate the physics reach of the experiment or optimise the detector design,Such a study typically involves various components:simulation,Visualisation,Analysis and (interactive)User *** focus on the design aspects of the collaboration of these frameworks and on the technologies that help to simplify the complex process of software design.

关键词：软件开发高能物理实验天文物理实验

中国生态系统研究网络(cern)——简介和进展

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AMBIO－人类环境杂志 1999年第8期28卷 636-638页

作者：赵士洞 cern科学委员会

引言在中国科学院和中国政府及世界银行的支持下,建立中国生态系统研究网络(Chinese Ecosystem Research Network,(cern))的工作是从1988年开始的,至今已经10多年了。中国科学院自50年代初建院以来,至今已经建立了分布在全国的一些重要... 详细信息

引言在中国科学院和中国政府及世界银行的支持下,建立中国生态系统研究网络(Chinese Ecosystem Research Network,(cern))的工作是从1988年开始的,至今已经10多年了。中国科学院自50年代初建院以来,至今已经建立了分布在全国的一些重要生态类型区域,代表着不同生态系统类型的100多个野外试验站。建立这些野外试验站的最初目的主要是为了帮助当地发展农业、林业、畜牧业和渔业,以及观测和研究像冰川、冻土、泥石流、滑坡等自然现象。在过去的50年中,这些站在帮助当地发展农业、合理利用自然资源、解决环境问题以及推动生态学研究方面都发挥了重要作用。 80年代以来,由于地球系统科学的发展,特别是由于以国际地圈一生物圈计划(IGBP)为代表的全球变化研究项目的启动。

关键词：中国生态系统研究网络 cern 进展生态网络

Integration of Geant4 with the Gaudi Framework

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International Conference on Computing in High Energy and Nuclear Physics 2001年第1期 366-369页

作者： I.Belyaev M.Frank 等 EuropeanLaboratoryforParticlePhysics（cern） GeneveSwitzerland EuropeanLaboratoryforParticlePhysics（CER

The GAUDI software framework is to be used for all event-processing applications in the LHCb *** GEANT4 toolkit has been integrated into GAUDI to form the basis of the LHCb simulation program *** benefits of this approach are that it permits re-use of basic services,such as persistency,interactivity and data visualization,as well as physics algorithms that were originally developed in the context of the reconstruction and analysis *** the GAUDI philosophy,the integration has been achieved by developing a number of services with abstract interfaces that can be plugged in at *** describe the overall design and details of the components for interfacing the detector geometry,the primary interaction and the output from tracking particles through the detector.

关键词： GAUDI软件数据处理事件模拟

Ensuring Long Time Access to DELPHI Data：The IDEA Project

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International Conference on Computing in High Energy and Nuclear Physics 2001年第1期 190-192页

作者： TizianoCampores DanielWicke 等 IHEP，Protvino Russia cern，Switzerland

The long term accessibility of its data is an important concern of the DELPHI *** is our assumption that the storage of the data itself will be a minor issue due to the progress in storage *** DELPHI focuses on a reorganisation of the data,which should provide a flexible and coherent framework for physics analysis in the *** paper describes the current status of the IDEA(Improved DElphi Analysis) project which will ensure usability of DELPHI data for future generations of physicists.

关键词：高能物理实验 DELPHI数据 IDEA项目

Software Process Improvement in CMS—Are we Different？

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International Conference on Computing in High Energy and Nuclear Physics 2001年第1期 451-454页

作者： J.P.Wellisch cern，1211Geneva Switzerland

One of the most challenging issues faced in HEP in recent years is the question of how to capitalise on software development and maintenance experience in a continuous *** capitalise inour context means to evaluate and apply new technologies as they arise,and to further evolve technologies arlready widely in use,It also implies the definition and adoption of standards,while ensuring reproducibility and quality of *** CMS process improvement effort is *** aims at continuous improve ment of the ways we do Object Oriented software,as well as continuous improvement in the efficiency of the working *** particular the use and creation of de-facto software process standards within CMS has proven to be key to our successful software process improvement *** describe the successful CMS implementation of a software process improvement strategy,following ISO 15504 since three *** give the current status of the most important processes families formally established in CMS,and provide the guidelines we followed both for tool development,and methodology establishment.

关键词：高能物理学软件开发软件处理

Hadronic Shower Models in GEANT4： Validation Strategy and Results.

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International Conference on Computing in High Energy and Nuclear Physics 2001年第1期 345-349页

作者： JohannesPeterWellisch cern，1211Geneva23 Switzerland

Optimal exploitation of hadronic final states played a key role in successes of all recent hadron collider experiment in HEP,and the ability to use hadronic final states will continue to be one of the decisive issues during the analysis phase of the LHC experinents Monte Carlo implementations of hadronic shower models provided with GEANT4 facilitate the use of hadronic final states,and have been developed for many *** will give an overview on the physics underlying hadronic shower simulation,discussing the three basic types of modelling;data driven,parametrisation driven,and theory driven modelling,and their respective implementation status in *** will confront the different types of modelling with a validation suite for hadronic generators based on cross-sections measurements from thin target experiments,and expose the strength and weaknesses of the individual approaches.

关键词：高能物理学强子碰撞实验强子末态

Ratio of photosynthetically active radiation to global solar radiation above forest canopy in complex terrain: measurements and analyses based on Qingyuan Ker Towers

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Ecological Processes 2024年第2期13卷 204-217页

作者： Shuangtian Li Qiaoling Yan Tian Gao Xingchang Wang Qingwei Wang Fengyuan Yu Deliang Lu Huaqi Liu Jinxin Zhang Jiaojun Zhu CAS Key Laboratory of Forest Ecology and Silviculture Institute of Applied Ecology Chinese Academy of Sciences Qingyuan Forest cern National Observation and Research Station Chinese Academy of Sciences CAS-CSI Joint Laboratory of Research and Development for Monitoring Forest Fluxes of Trace Gases and Isotope Elements Institute of Applied Ecology Chinese Academy of Sciences (CAS) University of Chinese Academy of Sciences center for Ecological Research Northeast Forestry University

Background Understanding of the ratio of photosynthetic photon flux density（Qp） to global solar radiation（Rs）(Qp/Rs) is crucial for applying Rsto ecology-related *** studies reported Qp/Rsand its variations based on measurements from a single observatory tower,instead of multi-site-based measurements over complex *** may neglect spatial heterogeneity in the terrain,creating a gap in an understanding of how terrain affects Qp/Rsand how this effect interacts with meteorological *** Here the Qingyuan Ker Towers（three towers in a valley with different terrains:T1,T2,and T3） were utilized to measure Qpand Rsover mountainous forests of Northeast *** airborne LiDAR system was used to generate a digital elevation model,and sky view factor of sectors（SVFs） divided from the field of view of tower's pyranometer was calculated as a topographic factor to explain the variations of Qp/*** The results identified significant differences in Qp/Rsof the three towers at both daily and half-hour scales,with larger differences on clear days than on overcast ***/Rswas positively correlated with SVFsof T1 and T3,while this correlation was negative with that of *** effect of SVFson Qp/Rsinteracted with clearness index,water vapor pressure and solar zenith *** forest-based importance assessment demonstrated that explanation（R2） on Qp/Rswas improved when SVFswas included in the predictor variable set,indicating that incorporating terrain effects enhances the prediction accuracy of Qp/*** improvement in the R2values was more pronounced on clear days than on overcast days,suggesting that the effect of terrain on Qp/Rsdepended on sky *** All findings suggested that Qp/Rsis affected by terrain,and integrating terrain information into existing Qp/Rsmodels is a feasible solution to improve Qp/Rsestimates in mountainous areas.

关键词： Photosynthetic photon flux density Clearness index water vapor pressure Solar zenith angle Terrain Sky view factor

Design and Prototyping of the ATLAS High Level Trigger

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International Conference on Computing in High Energy and Nuclear Physics 2001年第1期 593-596页

作者： J.A.C.Bogaerts cern，Geneva SwitzerlandJoannesAndreasBogaerts

This paper outlines the desgn and prototyping of the ATLAS High Level Trigger(HLT)wihch is a combined effort of the Data Collection HLT and PESA(Physics and Event Selection Architecture)subgroups within the ATLAS TDAQ *** important issues,alresdy outlined in the ATLAS HLT,DAQ and DCS Technical Proposal [1] will be highlighted:the treatment of the LVL2 Trigger and Event Filter as aspects of a general HLT with a view to easier migration of algorthms between the two levels;unification of the selective data collection for LVL2 and Event Building.

关键词： ATLAS实验高能级触发器数据收集

Development of the ATLAS Simulation Framework

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International Conference on Computing in High Energy and Nuclear Physics 2001年第1期 510-513页

作者： A.DellAcqua K.Amako 等 cern，Geneva Switzerland KEK，Tsukuda Japan

Object-oriented (OO) approach is the key technology to develop a software system in the LHC/ATLAS *** developed a OO simulation framework based on the Geant4 general-purpose simulation *** of complexity of simulation in ATLAS,we payed most attention to the scalability in its *** the first target to apply this framework is to implement the ATLAS full detector simulation program,there is no experiment-specific code in it,therefore it can be utilized for the development of any simulation package,not only for HEP experiments but also for various different research domains ,In this paper we discuss our approach of design and implementation of the framework.

关键词：软件开发关键技术 ATLAS模拟