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Modeling of the effect of hydrogen injection on blast furnace operation and carbon dioxide emissions

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International Journal of Minerals,Metallurgy and Materials 2022年第10期29卷 1851-1861页

作者： volodymyr Shatokha National Metallurgical Academy of Ukraine Dnipro 49005Ukraine

The effect of hydrogen injection on blast furnace operation and carbon dioxide emissions was simulated using a 1D steady-state zonal *** maximum hydrogen injection rate was evaluated on the basis of the simulation of the vertical temperature pattern in the blast furnace with a focus on the thermal reserve *** effects of blast temperature and oxygen enrichment were also examined to estimate coke replacement ratio,productivity,hydrogen utilization efficiency,and carbon dioxide emission *** blast temperature of 1200℃,the maximum hydrogen injection rate was 19.0 and 28.3 kg of H_(2)/t of hot metal(HM)for oxygen enrichment of 2vol%and 12vol%,*** showed a coke replacement ratio of 3-4 kg of coke/kg of H_(2),direct CO_(2) emission reduction of 10.2%-17.8%,and increased productivity by up to 13.7%depending on oxygen enrichment *** blast temperature further reduced the direct CO_(2) *** utilization degree reached the maximum of 0.52-0.54 H_(2)O/(H_(2)O+H_(2)).The decarbonization potential of hydrogen injection was estimated in the range from 9.4 t of CO_(2)/t of H_(2) to 9.7 t of CO_(2)/t of H_(2).For economic feasibility,hydrogen injection requires revolutionary progress in terms of low-cost H_(2) generation unless the technological change is motivated by the carbon emission *** injection may unfavorably affect the radial temperature pattern of the raceway,which could be addressed by adopting appropriate injection techniques.

关键词： hydrogen injection blast furnace zonal model carbon dioxide emissions

DATA PREORDERING IN GENERALIZED PAV ALGORITHM FOR MONOTONIC REGRESSION

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Journal of Computational Mathematics 2006年第6期24卷 771-790页

作者： Oleg Burdakov Anders Grimvall Oleg sysoev Department of Mathematics LinkSping University SE-58183 Link6ping Sweden

Monotonic regression （MR） is a least distance problem with monotonicity constraints induced by a partiaily ordered data set of observations. In our recent publication [In Ser. Nonconvex Optimization and Its Applications, Springer-Verlag, （2006） 83, pp. 25-33], the Pool-Adjazent-Violators algorithm （PAV） was generalized from completely to partially ordered data sets （posets）. The new algorithm, called CPAV, is characterized by the very low computational complexity, which is of second order in the number of observations. It treats the observations in a consecutive order, and it can follow any arbitrarily chosen topological order of the poset of observations. The CPAV algorithm produces a sufficiently accurate solution to the MR problem, but the accuracy depends on the chosen topological order. Here we prove that there exists a topological order for which the resulted CPAV solution is optimal. Furthermore, we present results of extensive numerical experiments, from which we draw conclusions about the most and the least preferable topological orders.

关键词： Quadratic programming Large scale optimization Least distance problem,Monotonic regression Partially ordered data set Pool-adjacent-violators algorithm.

226Ra irradiation to produce 225Ac and 213Bi in an accelerator-driven system reactor

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Nuclear Science and Techniques 2020年第5期31卷 12-17页

作者： Amer A.Al Qaaod volodymyr Gulik International Centre for Theoretical Physics(ICTP) TriesteItaly Institute for Safety Problems of NPPs KyivUkraine

This study aims to produce 229Th using an innovative nuclear reactor concept,i.e.,accelerator-driven system(ADS)***,we investigated the feasibility of producing 229Th from neutron transmutation of 226Ra to expand the availability of 225Ac and 213Bi in a simple model of ADS *** reactor comprises two zones,i.e.,an inner zone with a fast neutron spectrum and outer zone with thermal neutron spectrum,which is a subcritical core coupled with an external neutron *** behavior,activity,and mass ratio of the obtained isotopes were investigated using the Monte-Carlo *** addition with offering the capability,flexibility,and safety of radioactive waste transmutation,the proposed ADS model provides high 229Th yield and requires less time than a critical reactor with the same neutron flux and irradiated quantity of 226Ra.

关键词： 229Th production 226Ra irradiation Targeted alpha therapy ADS reactor Monte Carlo

A novel image fusion algorithm based on 2D scale-mixing complex wavelet transform and Bayesian MAP estimation for multimodal medical images

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Journal of Innovative Optical Health Sciences 2017年第3期10卷 52-68页

作者： Abdallah Bengueddoudj Zoubeida Messali volodymyr Mosorov Department of Electrical Engineering University of Bordj Bou Arreridj34030 El AnasserAlgeria Institute of Applied Computer Science Lodz University of Technology Stefanowskiego 18/2290-924 LodzPoland

In this paper,we propose a new image fusion algorithm based on two-dimensional Scale-Mixing Complex Wavelet Transform(2D-SMCWT).The fusion of the detail 2D-SMCWT cofficients is performed via a Bayesian Maximum a Posteriori(MAP)approach by considering a trivariate statistical model for the local neighboring of 2D-SMCWT *** the approx imation coefficients,a new fusion rule based on the Principal Component Analysis(PCA)is *** conduct several experiments using three different groups of multimodal medical images to evaluate the performance of the proposed *** obt ained results prove the superiority of the proposed method over the state of the art fusion methods in terms of visual quality and several commonly used *** of the proposed method is further tested against different types of *** plots of fusion met rics establish the accuracy of the proposed fusion method.

关键词： Medical imaging multimodal medical image fusion scale mixing complex wavelet transform MAP Bayes estimation principal component analysis.

Analysis of EX5del4232ins268 and EX5del955 PAH gene mutations in Ukrainian patients with phenylketonuria

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Genes & Diseases 2017年第2期4卷 108-110页

作者： volodymyr Pampukha Maryna Nechyporenko Ludmila Livshyts Institute of Molecular Biology and Genetics of the National Academy of Sciences of Ukraine Department of Human Genomics150Zabolotnogo str.03680 KyivUkraine

Phenylketonuria(PKU)is an autosomal recessive metabolic disorder caused by deficiency of phenylalanine hydroxylase(PAH).The major molecular defects causing PKU are missense mutations of PAH *** deletions of exon 5(EX5del955 and EX5del4232ins)were first reported by the Czech study and were later found also in the Polish,Slovak,Slovenian and Italian *** observations demonstrate the existence of a common subset of this mutation predominantly among Central European populations of Slavic *** is why we suggest that EX5del1955 and EX5del4232ins268 mutations might be frequent causes of PKU in Ukrainian ***5del955 and EX5del4232ins268 mutations were analyzed in 106 unrelated PKU patients negative for PAH gene mutations on one or both alleles from our previous *** simultaneous detection of EX5del4232ins268 and EX5del955 mutations was performed by PCR amplification of mutant ***5del955 mutation was not detected in the Ukrainian *** relative alleles frequency of EX5del4232ins268 mutation in the Ukrainian PKU population was determined as 1,66%.Our findings can be the one more evidence of Central European Slavic origin of EX5del4232ins268 mutation,suggested *** finding is important for the improvement of DNA diagnosis necessary for the management of PKU patients from Ukraine.

关键词： Large deletions Mutation analysis Phenylalanine hydroxylase Phenylketonuria

Expression of mRNA of chemokines and chemokine receptors and cytokines amount in the blood of healthy volunteers

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Advances in Bioscience and Biotechnology 2013年第2期4卷 206-213页

作者： Kirill sysoev Federal Center of Molecular Medicine I.P. Pavlov State Medical University St.-Petersbourg Russia

Background: Chemokines are small proteins that activate immune system in normal and pathological conditions. The induction of chemotaxis is a well-established role of chemokines. Moreover chemokines are important mediators of angiogenesis, implantation of fetus, and maturation of immune cells. In human body many types of cells express chemokines and cytokines at level of gene and protein. In blood cells chemokine and chemokine receptors mRNA level is a one of crucial points of chemokine system condition. The aim of the study was to evaluate the relationship between plasma concentration of cyto- kines and chemokines/chemokine receptors mRNA level in blood of healthy volunteers. Results: Gene expression of eotaxin, eotaxin-2, IL-8, MIP-1α, MIP- 1β, RANTES, CCR1, CCR3, CCR5, CXCR1, and CXCR2 was measured in peripheral blood cells, as well as the concentration of IL-1β, IL-1ra, IL-2, IL-4, IL-5, IL-6, IL-7, IL-8, IL-9, IL-10, IL-12 (p70), IL-13, IL-15, IL-17, eotaxin, FGF-2, G-CSF, GM-CSF, IFN-γ, IP-10, MCP-1, MIP-1α, MIP-1β, PDGF-BB, RANTES, TNF-α, and VEGF was evaluated in the plasma of 19 healthy individuals. We studied rela- tionship between mRNA levels of chemokines/recaptors and cytokine concentration in blood of healthy volunteers. Conclusion: These data are allowed to assess chemokines impact in the cytokine regulation of healthy subjects. These results indicate that chemokines and their receptors is diverse and redundant system of immune reactivity in response to internal and external challenges.

关键词： Chemokines Chemokine Receptors mRNA Cytokines Healthy Volunteers

Cluster Representation of the Structural Description of Images for Effective Classification

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Computers, Materials & Continua 2022年第12期73卷 6069-6084页

作者： Yousef Ibrahim Daradkeh volodymyr Gorokhovatskyi Iryna Tvoroshenko Medien Zeghid Department of Computer Engineering and Networks College of Engineering at Wadi AddawasirPrince Sattam Bin Abdulaziz UniversityWadi Addawasir11991Saudi Arabia Department of Informatics Kharkiv National University of Radio ElectronicsKharkiv61166Ukraine Electrical Engineering Department College of Engineering at Wadi AddawasirPrince Sattam Bin Abdulaziz UniversityWadi Addawasir11991Saudi Arabia Electronics and Micro-Electronics Laboratory Faculty of SciencesUniversity of MonastirMonastir5000Tunisia

The problem of image recognition in the computer vision systems is being *** results of the development of efficient classification methods,given the figure of processing speed,based on the analysis of the segment representation of the structural description in the form of a set of descriptors are *** propose three versions of the classifier according to the following principles:“object-etalon”,“object descriptor-etalon”and“vector description of the object-etalon”,which are not similar in level of integration of researched data *** options for constructing clusters over the whole set of descriptions of the etalon database,separately for each of the etalons,as well as the optimal method to compare sets of segment centers for the etalons and object,are *** experimental rating of the efficiency of the created classifiers in terms of productivity,processing time,and classification quality has been realized of the *** proposed methods classify the set of etalons without *** have formed the inference about the efficiency of classification approaches based on segment *** time of image processing according to the developedmethods is hundreds of times less than according to the traditional one,without reducing the accuracy.

关键词： Cluster representation computer vision description relevance descriptor image classification keypoint processing speed vector space

Pharmacological induced target temperature management after cardiac arrest： the capsaicinoids

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Neural Regeneration Research 2017年第10期12卷 1623-1624页

作者： J.Marc Simard Xiaofeng Jia volodymyr Gerzanich Department of Neurosurgery University of Maryland School of MedicineBaltimoreMDUSA Department of Orthopedics University of Maryland School of MedicineBaltimoreMDUSA Department of Anatomy and Neurobiology University of Maryland School of MedicineBaltimoreMDUSA Department of Biomedical Engineering Johns Hopkins University School of MedicineBaltimoreMDUSA Department of Anesthesiology and Critical Care Medicine Johns Hopkins University School of MedicineBaltimoreMDUSA

Cardiac or respiratory arrest lasting only a few minutes can inflict grave harm on numerous bodily organs, not least of all, the brain. Neurocognitive deficits, which are often severe and profoundly life altering, rem... 详细信息

关键词： Pharmacological induced target temperature management after cardiac arrest:the capsaicinoids

Improving the Effectiveness of Image Classification Structural Methods by Compressing the Description According to the Information Content Criterion

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Computers, Materials & Continua 2024年第8期80卷 3085-3106页

作者： Yousef Ibrahim Daradkeh volodymyr Gorokhovatskyi Iryna Tvoroshenko Medien Zeghid Department of Computer Engineering and Information College of Engineering inWadi AlddawasirPrince Sattam bin Abdulaziz UniversityAl-Kharj16273Saudi Arabia Department of Informatics Kharkiv National University of Radio ElectronicsKharkiv61166Ukraine Electronics and Micro-Electronics Laboratory Faculty of SciencesUniversity of MonastirMonastir5000Tunisia

The research aims to improve the performance of image recognition methods based on a description in the form of a set of keypoint *** main focus is on increasing the speed of establishing the relevance of object and etalon descriptions while maintaining the required level of classification *** class to be recognized is represented by an infinite set of images obtained from the etalon by applying arbitrary geometric *** is proposed to reduce the descriptions for the etalon database by selecting the most significant descriptor components according to the information content *** informativeness of an etalon descriptor is estimated by the difference of the closest distances to its own and other *** developed method determines the relevance of the full description of the recognized object with the reduced description of the *** practical models of the classifier with different options for establishing the correspondence between object descriptors and etalons are *** results of the experimental modeling of the proposed methods for a database including images of museum jewelry are *** test sample is formed as a set of images from the etalon database and out of the database with the application of geometric transformations of scale and rotation in the field of *** practical problems of determining the threshold for the number of votes,based on which a classification decision is made,have been *** has revealed the practical possibility of tenfold reducing descriptions with full preservation of classification *** the descriptions by twenty times in the experiment leads to slightly decreased *** speed of the analysis increases in proportion to the degree of *** use of reduction by the informativeness criterion confirmed the possibility of obtaining the most significant subset of features for classification,which guarantees a decent

关键词： Description reduction description relevance descriptor image classification information content keypoint processing speed