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Two examples of surfaces with normal crossing singularities

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Science China Mathematics 2011年第8期54卷 1707-1712页

作者： KOLLR jános Department of Mathematics Princeton University

This note gives two examples of surfaces with normal crossing *** the first example the canonical ring is not finitely *** the second,the canonical line bundle is not ample but its pull back to the normalization is *** latter answers in the negative a problem left unresolved in Ⅲ.2.6.2 of lments de gometrie algbrique,1961,and raised again by Viehweg.

关键词： singular surface canonical ring ampleness criteria

Moduli of Polarized Calabi–Yau Pairs

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Acta Mathematica Sinica,English Series 2020年第6期36卷 631-637页

作者： jános KOLLáR Chen Yang XU Princeton University Princeton NJ 08544-1000USA MIT CambridgeMA 02139-4307USA

We prove that the irreducible components of the moduli space of polarized Calabi–Yau pairs are projective.

关键词： Polarized Calabi–Yau stable pairs Moduli spaces

A Tutorial Review of the Solar Power Curve: Regressions, Model Chains, and Their Hybridization and Probabilistic Extensions

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Advances in Atmospheric Sciences 2024年第6期41卷 1023-1067页

作者： Dazhi YANG Xiang’ao XIA Martin jános MAYER School of Electrical Engineering and Automation Harbin Institute of TechnologyHarbin 150001HeilongjiangChina Key Laboratory for Middle Atmosphere and Global Environment Observation(LAGEO) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Department of Energy Engineering Faculty of Mechanical EngineeringBudapest University of Technology and EconomicsMűegyetem rkp.3Budapest H-1111Hungary

Owing to the persisting hype in pushing toward global carbon neutrality,the study scope of atmospheric science is rapidly *** numerous trending topics,energy meteorology has been attracting the most attention *** essential skill of solar energy meteorologists is solar power curve modeling,which seeks to map irradiance and auxiliary weather variables to solar power,by statistical and/or physical *** this regard,this tutorial review aims to deliver a complete overview of those fundamental scientific and engineering principles pertaining to the solar power *** power curves can be modeled in two primary ways,one of regression and the other of model *** classes of modeling approaches,alongside their hybridization and probabilistic extensions,which allow accuracy improvement and uncertainty quantification,are scrutinized and contrasted thoroughly in this review.

关键词： review energy meteorology solar power curve model chain solar power prediction

Drying of suspensions and solutions on inert particle surface in mechanically spouted bed dryer

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China Particuology 2007年第5期5卷 337-344页

作者： Elisabeth Pallai-Varsányi judit Tóth jános Gyenis University of Pannonia Faculty of Information TechnologyResearch Institute of Chemical and Process Engineering Egyetem u. 2H-8200 VeszprémHungary Hungarian Academy of Sciences Chemical Research CentreInstitute of Materials and Environmental ChemistryPusztaszeri u. 59-67H-1025 BudapestHungary

To eliminate some disadvantages of the conventional spouted bed dryers the mechanically spouted bed （MSB） system was developed. This dryer type is convenient to use inert particles providing an increased surface area for drying of materials of high-moisture content and heat sensitive materials. On three different drying tasks are demonstrated the experimental optimization of process parameters to obtain products of demanded quality. The main object was at drying of AIO（OH） suspension to preserve the particle size under 2.5μm and to obtain product with a moisture content of about 0.05 kg/kg （d.b.）. For this reason a very thin particle coating and intensive abrasion had to be assured. At drying of tomato concentrates the thermoplasticity makes the process very difficult. To jump over the deliquescent and sticky state developed at the critical temperature-moisture content values a very short drying time （8-10 s） must be provided. The third task was to form powder-like product from bovine serum albumin （BSA） solution having very low solid content （2-4%）. The selected process parameters given in this paper resulted in a mean particle size of less than 20 μm while the soluble oreserved orotein content was higher than 90%.

关键词： Mechanically spouted bed Film-like drying Inert particles Heat sensitive material

Apples to oranges:environmentally derived,dynamic regulation of serotonin neuron subpopulations in adulthood?

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Neural Regeneration Research 2025年第9期20卷 2596-2597页

作者： Christopher j.O’Connell Matthew j.Robson Department of Genetics College of MedicineHarvard UniversityBostonMAUSA james L.Winkle College of Pharmacy Division of Pharmaceutical SciencesUniversity of CincinnatiCincinnatiOHUSA Neuroscience Graduate Program College of MedicineUniversity of CincinnatiCincinnatiOHUSA

Traumatic brain injury(TBI)is a public health problem with an undue economic burden that impacts nearly every age,ethnic,and gender group across the globe(Capizzi et al.,2020).TBIs are often sustained during a dynamic range of exposures to energetic environmental forces and as such outcomes are typically heterogeneous regarding severity and pathology(Capizzi et al.,2020).

关键词： sustained orange dynamic

NEW WAYS TO OBTAIN NEW ANTIBIOTICS

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中国抗生素杂志 1984年第4期9卷 348-360页

作者： jános Bérdy Budapest Hungary Institute for Drug Research

The antibiotic research is one ofthe most productive and successfulareas of the natural product *** early forties up to now more than9000 natural products were discoveredwhich have some antimicrobial, antiviral,antitumor or similar activities. Table1. illustrates the approximate numberof presently known antibiotic compoundsaccording to their main sources. The numbers in Table 1. include

关键词： than NEW WAYS TO OBTAIN NEW ANTIBIOTICS OI

A remark on density theorems for Riemann's zeta-function

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Science China Mathematics 2023年第12期66卷 2795-2802页

作者： janos Pintz ELKH Alfréd Rényi Mathematical Institute Budapest H-1053Hungary

The goal of this paper is to give a relatively simple proof of some known zero density estimates for Riemann's zeta-function which are sufficiently strong to break the density hypothesis for Re s>7/*** from a simple but ingenious idea of Halász the proof uses only classical knowledge about the zeta-function,results known for at least hundred years.

关键词： Riemann's zeta-function density hypothesis density theorems

Start the Earth System Governance that Integrates “Climate-Altering Technologies”

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Chinese journal of Urban and Environmental Studies 2020年第2期8卷 136-140页

作者： jános PáSZTOR Carnegie Climate Governance Initiative (C2G)

Addressing climate emergencies requires a radical social change, and an “earth system” governance approach that combines different factors(including technologies that affect climate). As the Paris Agreement has been reached for four years and came into force for three years, there is a growing recognition that the global average temperature rise cannot be limited to 1.5–2°C only by emissions reduction or existing carbon removal measures. The reason is that the world has not taken enough actions to deal with the crisis. As reported by IPCC(2018), hundreds of millions of people worldwide are already experiencing the harsh consequences of climate change, from storms to floods, to heatwaves and droughts [IPCC. 2018. “International Panel on Climate Change Special Report on Global Warming of 1.5 Degrees.” https://***/sr15(accessed November 5, 2019)]. According to Spratt and Dunlop(2019), as the climate change intensifies,all sectors of society have realized the need to avoid the risks brought by climate change and to deal with the severe disasters that already exist [Spratt, David, and Ian Dunlop. 2019.“Existential Climate-related Security Risk: A Scenario Approach.” https://***/ugd/***(accessed November 5, 2019)]. This raises some profound questions. For instances, should people consider a new responsive measure that is compatible with the natural system which sustains life on the earth, and within the limits of the earth’s tolerance? What forms of decision-making might we need, to help us make the smart collective choices needed for a world where no risk-free options remain? Are familiar governance and decision-making processes still suitable for the goals? Who will make the decisions to promote this transformation? If people really want to change the way they make decisions, they may need to create new forms of governance and decide how this transformation begins and which authority is subject to.

关键词： climate-altering technology Earth system governance shared learning platform

Behavior of transporting pipeline sections without and with hydrogen exposure based on full-scale tests

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China Welding 2024年第3期33卷 14-24页

作者： Nóra Nagy jános Lukács Institute of Materials Science and Technology Faculty of Mechanical Engineering and InformaticsUniversity of MiskolcMiskolc 3515Hungary

Pipeline transport of hydrogen is one of today’s economic and environmental *** order to find safe and reliable application of both existing gas and build new pipelines,it is essential to carry out tests on full-scale pipeline section,including the potentially more dangerous places than the main pipe,the girth *** the investigations,pipeline sections of P355NH steel with girth welds were prepared and exposed to pure hydrogen at twice the maximum allowable operating pressure for 41 ***,full-scale burst tests were carried out and specimens were cut and prepared from the typical locations of the failed pipeline sections for mechanical,and macro-and microstructural *** results obtained were evaluated and compared with data from previous full-scale tests on pipeline sections without hydrogen *** results showed differences in the behavior of pipeline sections loaded in different ways,with different characteristics of the materials and the welded joints,both in the cases without hydrogen exposure and in the cases exposed to hydrogen.

关键词： gas transporting pipeline full-scale pipeline test complex loading condition hydrogen exposure safety factor