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A threefold approach to rescue the 2030 Agenda from failing

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National Science Review 2023年第7期10卷 13-15页

作者： Prajal Pradhan Bauhaus Earth gmbh Potsdam Institute for Climate Impact Research (PIK) Member of the Leibniz Association

Countries are not on track to meet the2030 Agenda for Sustainable Development [1] that calls for transformative changes to shift the world onto a sustainable and resilient *** 2030Agenda comprises 17 Sustainable Development Goals (SDGs) and 169 targets to be achieved by 2030,balancing the three sustainability dimensions—social,economic,and *** far,SDGs have had a limited transforma-tive impact [2] because of their selective implementation without considering their complex *** interact positively (***) or negatively(***-offs) depending on contextand location-specific *** to meet SDGs will negatively affect the lives of billions of people and worsen socioeconomic and environmental crises.

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Progress in the research and application of coal mining with stowing

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International Journal of Mining Science and Technology 2013年第1期23卷 7-12页

作者： Junker Martin Witthaus Holger RAG Mining Solutions gmbh Shamrockring 1 44623 Herne Germany

The development and achievements of modern coal mining with stowing are discussed in this paper. The necessity of developing coal mining with stowing is briefly summarized and internal damage within the strata and external damage on surface induced by longwall working with caving are discussed. Technological features of coal mining with pneumatic stowing in Germany, and fully mechanised coal mining with solid dense stowing in China, are discussed. In German hard coal mining stowing technologies are for technical, infrastructural and economical reasons not applicable. The discussion includes the stowing material transportation system, the stowing machine, and processes at the face. Progressiveness and application universality of China's fully mechanised coal mining with solid dense stowing are illustrated through practical examples with different conditions. Obviously, the fully mechanised coal mine with solid dense stowing can be improved by automaion systems. This paper discusses further developmental potential of the technology.

关键词： Coal mining with solid stowing Coal mining with pneumatic stowing Fully mechanised Coal mining with stowing in China and Germany

Simulation of urban microclimate with uhiSolver:software validation using simplifed material data

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Ecological Processes 2021年第1期10卷 921-943页

作者： Florian Teichmann Christina Maria Baumgartner Andras Horvath Markus Luisser Azra Korjenic Vienna University of Technology ViennaAustria. Rheologic gmbh ViennaAustria.

Background:Increasing urbanization as well as global warming requires an investigation of the infuence of diferent construction methods and ground surfaces on the urban heat island efect(UHI efect).The extent of the infuence of the urban structure,the building materials used and their surfaces on the UHI efect can be signifcantly reduced already in the planning phase using a designated OpenFOAM-based solver“uhiSolver”.Results:In the frst part of this research work,it is shown that inner building details and components can be neglected while still obtaining sufciently accurate *** this purpose,the building model was divided into two layers:a surface layer without mass,where the interaction with radiation takes place,and a component layer,which contains all relevant components and cavities of the building represented with mass-averaged material *** has become apparent that the three parameters—albedo,heat capacity and thermal resistance—which have a decisive infuence on the interaction,have diferent efects on the component temperatures and the surface *** the second part of this research work,dynamic 3D computational fuid dynamics(CFD)simulations are performed with uhiSolver for a residential block in *** the simulation results with measurement data collected on site,it is shown that the simplifed assumption of homogeneous material data for building bodies provides very good results for the validation case ***,the infuence of the greening measures in the courtyard of the residential block on the air temperature is found to be ***,it was observed that due to locally higher radiation density,lower air velocities and higher air humidity,the apparent temperature in the courtyard is sometimes perceived to be higher than in the adjacent streets,despite the lower air ***:Simplifying the modeling process of the uhiSolver software by reducing the model complexity helps to reduce

关键词： Urban heat island efect Urban microclimate CFD simulation Microclimate simulation Apparent temperature

Laser-based manufacturing concepts for efficient production of tailor welded sheet metals

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Advances in Manufacturing 2014年第3期2卷 193-202页

作者： Marius Sp?ttl Hardy Mohrbacher WISCO Lasertechnik gmbh RavensburgGermany NiobelCon bvba SchildeBelgium

Laser welding is an established manufacturing technology for a large variety of automotive applications due to its attractive properties such as low heat input, high precision and fast welding speed. Especially when welding high strength steels, which are dominantly used in today＇s car body construction, the low heat input by laser welding bears significant advantages with regard to the properties of the weld seam. The exploitation of the full application potential of laser welding in mass production requires an appropriate manufacturing concept and corresponding auxiliary technologies. The present paper demonstrates the integration of laser welding into the surrounding manu- facturing concepts by a modular setup with different levels of automation. This approach offers flexible solutions for individual needs thereby optimizing investment cost, labor cost and productivity. Recently available laser sources enable exceptionally high welding speed on thin gauged sheet metals but require efficient material handling con- cepts to utilize the full speed potential. Industrial concepts are presented offering efficient material handling and high process robustness for mass production welding.

关键词： Laser welding Tailored blanks Tailoredcoils Material handling Process robustness Laser beamsplitting Turbo-welding Weld edge conditioning

Review of accelerator driven heavy ion nuclear fusion

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Matter and Radiation at Extremes 2018年第1期3卷 1-11页

作者： Ingo Hofmann GSI Helmholtzzentrum fur Schwerionenforschung gmbh Planckstr64291 DarmstadtGermany

Using high energy accelerators for energy production by nuclear fission goes back to the 1950's with plans for“breeder accelerators”as well as with early ideas on subcritical reactors,which are currently pursued in China and other ***,fusion came in,when the idea emerged in the mid 1970's to use accelerators and their highly time and space compressed beams in order to generate the extremely high density and temperatures required for inertial fusion energy *** to the higher repetition rates and efficiencies of accelerators,this was seen as a promising alternative to using high power *** an introduction to nuclear fission applications of accelerators,this review summarizes some of the scientific developments directed towards this challenging application e with focus on the European HIDIF-study-and outlines parameters of future high energy density experiments after construction of the FAIR/Germany and HIAF/China heavy ion accelerator projects.

关键词： repetition accelerator heavy

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E8粒子的自旋动力学研究（英文）

Science Bulletin 2024年第19期 2974-2977页

作者：王骁 Konrad Puzniak Karin Schmalzl Christian Balz Masaaki Matsuda Akira Okutani Masayuki Hagiwara 马杰吴建达 Bella Lake Tsung-Dao Lee Institute Shanghai Jiao Tong University Helmholtz-Zentrum Berlin für Materialien und Energie gmbh Institut für Festk?rperphysik Technische Universit?t Berlin Jülich Centre for Neutron Science JCNS Forschungszentrum Jülich GmbH ISIS Neutron and Muon Source STFC Rutherford Appleton Laboratory Neutron Scattering Division Oak Ridge National Laboratory Center for Advanced High Magnetic Field Science Graduate School of ScienceOsaka University School of Physics&Astronomy Shanghai Jiao Tong University Collaborative Innovation Center of Advanced Microstructures Nanjing University Shanghai Branch Hefei National Laboratory

Unlike the classical phase transition driven by thermal fluctuations,the quantum phase transition arises at zero temperature when the system is tuned by a non-thermal parameter[1].For a continuous quantum phase transition,novel physics with higher symmetry may emerge at the quantum critical point (QCP).As the system is driven away from the QCP with a relevant perturbation,exotic physics may further emerge due to the strong renormalization of the almost infinite low-lying excitations[2].The transverse-field Ising chain (TFIC) is a paradigmatic model[1–3]:when an Ising chain is tuned to its QCP by a magnetic field applied transverse to its Ising anisotropy,

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Embedded fuzzing:a review of challenges,tools,and solutions

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Cybersecurity 2022年第4期5卷 1-18页

作者： Max Eisele Marcello Maugeri Rachna Shriwas Christopher Huth Giampaolo Bella Safety Security and PrivacyRobert Bosch GmbHRenningenGermany Dept.of Math and Computer Science Universita degli Studi di CataniaCataniaItaly RBEl Robert Bosch GmbHBangaloreIndia.

Fuzzing has become one of the best-established methods to uncover software ***,the market of embedded systems,which binds the software execution tightly to the very hardware architecture,has grown at a steady pace,and that pace is anticipated to become yet more sustained in the near *** systems also beneft from fuzzing,but the innumerable existing architectures and hardware peripherals complicate the development of general and usable approaches,hence a plethora of tools have recently *** comes a stringent need for a systematic review in the area of fuzzing approaches for embedded systems,which we term'embedded fuzzing"for *** inclusion criteria chosen in this article are semi-objective in their coverage of the most relevant publication venues as well as of our personal *** review rests on a formal definition we develop to represent the realm of embedded *** continues by discussing the approaches that satisfy the inclusion criteria,then defines the relevant elements of comparison and groups the approaches according to how the execution environment is served to the system under *** resulting review produces a table with 42 entries,which in turn supports discussion suggesting vast room for future research due to the limitations noted.

关键词： Embedded systems Dynamic analysis Vulnerability mining Embedded security Software security

Electrical Conductivity of Sintered Chromia Mixed with TiO_2,CuO and Mn-Oxides

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Journal of Materials Science & Technology 2006年第2期22卷 245-251页

作者： K.El-Menshawy H.P.Buchkremer F.Tietz D.Stoever Metallurgy Dept. Atomic Energy Authority CairoEgypt Institute for Materials and Processes in Energy Systems IWV-1 Forschungszentrum Juelich gmbh JuelichGermany Institute for Materials and Processes in Energy Systems IWV-1 Forschungszentrum Juelich gmbh Juelich Germany

The electrical conductivity of sintered Cr2O3 mixed with 2% and 5% （in molar fraction） TiO2 or CuO was investigated in the temperature range 500-900℃ in air and in At/4 vol. pct H2 atmospheres. The effect of different Mn-oxides on the electrical conductivity of Cr2O3 was also studied under the same conditions. From the conductivity measurements it is established that additions of TiO2 change the defect structure of Cr2O3 and the effect of TiO2 on the electrical conductivity is controlled by TiO2 concentration as well as temperature and O2 partial pressure of the surrounding atmosphere. The conductivity of Cr2O3 increased in air and decreased in the At/H2 atmosphere by CuO additions. The effect of CuO was discussed with possible changes in the defect concentration in Cr2O3. Mixing of Cr2O3 with different Mn-oxides at the same Mn to metal atom fraction decreased the conductivity in air and in Ar/H2 atmospheres. No clear correlation between the spinel fraction and the changes in conductivity could be found.

关键词： Electrical conductivity Cr2O3 Mixing with TiO2 CuO Mn-oxides

Evidence for distortion-induced local electric polarization in α-RuCl_(3)

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Science China(Physics,Mechanics & Astronomy) 2024年第9期67卷 165-173页

作者： Xinrun Mi De Hou Xiao Wang Sabreen Hammouda Caixing Liu Zijian Xiong Han Li Yan Liu Guiwen Wang Aifeng Wang Yisheng Chai Yang Qi Wei Li Xiaoyuan Zhou Yixi Su DIKhomskii Mingquan He Zhigao Sheng Young Sun College of Physics Center of Quantum Materials and DevicesChongqing UniversityChongqing 401331China Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field LaboratoryHefei Institutes of Physical ScienceAnhuiChinese Academy of SciencesHefei 230031 China University of Science and Technology of China Hefei 230026China Jülich Centre for Neutron Scienceat Heinz Maier-Leibnitz Zentrum(JCNS-MLZ) Forschungszentrum Jülich GmbHGarching D-85747Germany School of Physics Beihang UniversityBeijing 100191China Analytical and Testing Center Chongqing UniversityChongqing 401331China State Key Laboratory of Surface Physics Department of PhysicsFudan UniversityShanghai 200433China CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China Ⅱ.Physikalisches Institut Universität zu KölnKöln D-50937Germany

The spin-orbit assisted Mott insulator α-RuCl_(3) is a prime candidate for material realization of the Kitaev quantum spin *** little attention has been paid to charge degrees of freedom,charge effects,such as electric polarization,may arise in this ***,we report distortion-induced local electric polarization in α-RuCl_(3) as evidenced by single-crystal X-ray diffraction,second harmonic generation(SHG)and dielectric *** SHG signal appears at room temperature and develops substantially in the Kitaev paramagnetic state when short-range spin correlations come into *** sizable pyroelectric currents in the Kitaev paramagnetic state,the absence of hysteresis in the polarization-electric field(P-E)points to the shortrange nature of electric *** localized electric polarization is likely the result of distortion-induced charge dimerization,achieved through virtual hopping-induced charge *** addition,the electric polarization is boosted by short-range spin correlations via spin-phonon coupling in the Kitaev paramagnetic *** results emphasize the importance of charge degrees of freedom in α-RuCl_(3),which establish a novel platform to investigate charge effects in Kitaev materials.

关键词： Mott insulator Kitaev quantum spin liquid electric polarization