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Applicability of high-temperature cooling systems in different European countries from the view of the condensation risk

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Building Simulation 2021年第5期14卷 1453-1466页

作者： vladimir Zmrhal Martin Bartak Czech Technical University in Prague Faculty of Mechanical EngineeringDepartment of Environmental Engineering Technicka 416000 Prague 6Czech Republic

Due to the different approaches in determining the ventilation airflow rate per person for workspaces,where high-temperature air conditioning systems are used for air conditioning,problems with the condensation of water vapour on the cold surfaces of the system can *** article analyses the risk of condensation in various European cities using the available climatic *** with cooling ceilings and cooling beams with a ventilation device operating in parallel are taken into *** ventilation airflow rates per person were *** the example of a room equipped with high-temperature cooling,an energy simulation calculation is performed,which includes a ventilation and air-conditioning system with the possibility of capacity *** is clear from the results that the condensation of water vapour can be prevented by technical measures at the cost of reducing the cooling capacity,which can affect the achievement of the thermal comfort of those *** the end,suitable solutions are discussed,which should already be adopted at the time the device is designed so that the risk of condensation is not a major obstacle in the operation of these energy-efficient *** irreplaceable role in the operation of high-temperature cooling systems is played by a measurement and control system with a suitable algorithm to prevent condensation.

关键词： ventilation air-conditioning cooled ceilings chilled beams low energy cooling risk of condensation

Negative Magnetoresistivity of ErBi and Its Crystal-Field Levels

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Chinese Physics Letters 2009年第1期26卷 268-271页

作者：刘照森 Divis Martin Sechovsky vladimir Faculty of Mathematics and Physics Nanjing University of Information Science and Technology Nanjing 210044 Department of Condensed Matter Physics Faculty of Mathematics and Physics Charles University Ke Karlovu 5 121 16 Prague 2 Czech Republic

A theoretical approach is generalized and employed in this work to evaluate the magnetoresistivity of ErBi in external magnetic fields. The calculated results and theoretical analyses show that when an external magnetic field is applied in the z-direction, the magnetoresistivity can be reduced considerably due to the degeneracy lifting of the crystal-field levels. However, when the magnetic field is exerted along the x-axis, the magnetoresistivity will be increased because of the formations of new magnetic states of the Er ion and its transitions within and between these new states.

关键词： field emission molybdenum dioxide enhancement factor

Evaluation of Energy Saving Operational Modes for Industrial Fracture Connected Processes on the Basis of Incubation Time Fracture Criterion

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Transactions of Tianjin University 2008年第B10期14卷 476-482页

作者： Bratov vladimir Petrov Yuri InstituteofProblemsofMechanicalEngineering 199178St.-PetersburgRussia St.-PetersburgStateUniversity 198504St.-PetersburgRussia

A problem for a central crack in a plate subjected to plane strain conditions is investigated. Mode I crack loading is created by a dynamic pressure pulse applied at a large distance from the crack. It was found that for a certain combination of amplitude and duration of the pulse applied, the energy transmitted to the sample has a strongly marked minimum, meaning that with the pulse amplitude or duration moving away from the optimal values, minimum energy required for initiation of crack growth increases rapidly. The results obtained indicate a possibility to optimise energy consumption of different industrial processes connected with fracture. Much could be gained in, for example, drilling or rock pounding where energy input accounts for the largest part of the process cost. Presumably further investigation of the effect observed can make it possible to predict optimal energy saving parameters, i.e. frequency and amplitude of impacts, for industrial devices, e.g. bores, grinding machines, and hence significantly reduce the process cost. The pre- diction can be given based on the parameters of the media fractured （material parameters, prevalent crack length and orientation, etc.）.

关键词： fracture energy saving incubation time fracture criterion

Computation of Fisher–Gale Equilibrium by Auction

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Journal of the Operations Research Society of China 2018年第3期6卷 473-483页

作者： Yurii Nesterov vladimir Shikhman Center for Operations Research and Econometrics Catholic University of Louvain1348 Louvain-la-NeuveBelgium National Research University Higher School of Economics MoscowRussia Department of Mathematics Technische Universität Chemnitz09126 ChemnitzGermany

We study the Fisher model of a competitive market from the algorithmic *** that,the related convex optimization problem due to Gale and Eisenberg(Ann Math Stat 30(1):165–168,1959)is *** latter problem is known to yield a Fisher equilibrium under some structural assumptions on consumers’utilities,e.g.,homogeneity of degree 1,*** goal is to examine applicability of the convex optimization framework by departing from these traditional *** just assume the concavity of consumers’utility *** this case,we suggest a novel concept of Fisher–Gale equilibrium by using consumers’utility *** prices of utility transfer the utility of consumption bundle to a common numé*** develop a subgradient-type algorithm from Convex Analysis to compute a Fisher–Gale equilibrium via Gale’s *** order to decentralize prices,we additionally implement the auction design,i.e.,consumers settle and update their individual prices and producers sell at the highest offer *** price adjustment is based on a tatonnement procedure,i.e.,the prices change proportionally to consumers’individual excess *** averages of consumption are shown to clear the market of *** algorithm is justified by a global rate of *** the worst case,the number of price updates needed to achieve anε-tolerance is proportional to 1/ε^(2).

关键词： Fisher equilibrium Computation of equilibrium Price adjustment Convex optimization Subgradient methods Decentralization of prices Auction

Attempts to restore loss of function in damaged ACD cells open the way to non-mutational oncogenesis

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Genes & Diseases 2024年第3期11卷 5-6页

作者： vladimir F.Niculescu 86420 Diedorf Germany Kirschenweg

This correspondence to Gene&Diseases calls attention to the controversy between proponents of genetic modification in carcinogenesis and supporters of non-mutational *** from molecular cancer research and findings from evolutionary cancer cell biology support the latter claim and provide no rationale for the mutational origin of sporadic *** is more conceivable that the general susceptibility of asymmetric cell division(ACD)phenotypes to oxygen leads to irreparable DNA defects and dysregulated defective symmetric cell division(DscD)phenotypes.

关键词： rational latter finding

Task-resource Scheduling Problem

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International Journal of Automation and computing 2012年第4期9卷 429-441页

作者： Anna Gorbenko vladimir Popov Department of Intelligent Systems and Robotics Ural State University

Cloud computing is a new and rapidly emerging computing paradigm where applications, data and IT services are provided over the Internet. The task-resource management is the key role in cloud computing systems. Task-resource scheduling problems are premier which relate to the efficiency of the whole cloud computing facilities. Task-resource scheduling problem is NP-complete. In this paper, we consider an approach to solve this problem optimally. This approach is based on constructing a logical model for the problem. Using this model, we can apply algorithms for the satisfiability problem (SAT) to solve the task-resource scheduling problem. Also, this model allows us to create a testbed for particle swarm optimization algorithms for scheduling workflows.

关键词： Clouds complexity theory scheduling satisfiability problem genetic algorithms

A comment on the article of Zoran Ivanovic and Marija Vlaski-Lafarge(2022):On cancer,stemness and deep evolutionary homologies

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Genes & Diseases 2023年第4期10卷 1139-1140页

作者： vladimir F.Niculescu Kirschenweg 1 Diedorf 86420Germany

The comment of Ivanovic and Vlaski-Lafarge on my article“Cancer genes and cancer stem cells in tumorigenesis:Evolutionary deep homology and controversies”opens up a welcome discussion on the evolutionary history of *** authors have appreciative words about my work,for which I am very *** this point,I would like to contribute a few words on polyploidy,cancer genes,age,and colonial organization.

关键词： cancer Cancer evolutionary

Cancer genes and cancer stem cells in tumorigenesis:Evolutionary deep homology and controversies

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Genes & Diseases 2022年第5期9卷 1234-1247页

作者： vladimir F.Niculescu Kirschenweg 1 Diedorf 86420Germany

In the past,contradictory statements have been made about the age of cancer *** phylostratigraphic studies suggest that cancer genes emerged during the transitional period from unicellularians(UC)to early metazoans(EM),life cycle studies suggest that they arose *** controversy could not be *** methods use data from somatic tumor gene collections containing or lacking polyploidy genes(PGCC genes)and compare them to genes from evolutionary node taxa.I analyze whether the selected taxa are suitable to resolve the above contradiction or *** cancer and amoebae life cycles have a reproductive asexual germline that produces germline stem cells(GSCs)and somatic cell lines that *** the germline loses its reproductive function,the soma-to-germ transition forms a new reproductive *** reproductive polyploidy of cancer is homologous to the reproductive polyploidy of unicellular *** repair DNA defects,reorganize the involved genome architecture and produce new *** present study refutes the dogma of the early metazoan origin of *** has a unicellular life cycle that was adopted by early metazoans to rescue themselves from evolutionary dead *** metazoans controlled the unicellular life cycle through suppressor and anti-suppressor genes that could suspend or reactivate *** are the archetypes of tumor suppressor genes and *** of mammalians and humans that reach a similar impasse as early metazoans can reactivate the conserved life cycle of unicellularians.

关键词： Cancer Entamoeba Gene age Life cycle Polyploidy CSCs EMT PGCC

Ecology and social behavior of the tamarisk gerbil Meriones tamariscinus: insights from long-term research in the wild and semi-natural environments

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Current Zoology 2024年第5期70卷 685-695页

作者： vladimir S.Gromov A.N.Severtsov Institute of Ecology and Evolution Leninsky Ave.33Moscow 119071Russia

The present review provides a compilation of the published data on the ecology and social behavior of tamarisk gerbils. Both field studies anddirect observations under semi-natural conditions provide evidence that the tamarisk gerbil is a nocturnal herbivorous rodent that lives in highlyseasonal habitats and displays seasonal fluctuations in reproduction and spatial organization. A typical feature of the tamarisk gerbils’ spatialorganization is higher mobility of males during the breeding season (as compared with the nonbreeding period) and formation of temporaryaggregations of males competing for access to receptive females;the composition of these aggregations was variable and depended on thereproductive condition of the females. Females tend to occupy exclusive home ranges irrespective of their reproductive condition. The matingsystem of the species can be defined as scramble competition polygyny with some features of polygynandry and promiscuity. The tamariskgerbil has distinct features of a solitary species and its social structure is primarily based on aggressive interactions or mutual avoidance ofconspecifics resulting in a dominance hierarchy among males and site-dependent dominance among females during the breeding season. Bythe end of the breeding season, males become less mobile and occupy nearly exclusive home ranges, consistent with solitary living. The mainfeatures of the spatial and social organization of this species, which distinguish it from other solitary rodents, are the higher mobility of malesand the formation of temporary multimale–multifemale aggregations during the breeding season. Overall, the data presented expand our understanding of socioecology of gerbils.

关键词： ecology reproduction social behavior spatial organization tamarisk gerbil