Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information最新文献

{"title":"SECURITY OF SUCCESS — IN CLOSE TIES WITH SCIENCE AND PRODUCTION PLANTS Approaching 75th anniversary of the journal “Ferrous Metallurgy. Bulletin of Scientific, Technical and Economic Information”","authors":"А. V. Bessonov","doi":"10.32339/0135-5910-2019-3-289-292","DOIUrl":"https://doi.org/10.32339/0135-5910-2019-3-289-292","url":null,"abstract":"Scientific and technical journals are related to editions, which make considerableinfluence on equipment and technology of industrial production development. Under modern conditions, when a production science intensity becomes one of main factors of scientific and technical progress, the need in such editions becomes rather important. Facts of the history of the journal “Ferrous Metallurgy. Bulletin of Scientific, Technical and Economic Information” creation and formation shown, as one of most competent industry journals. Its input into forming of the scientific and technical information of domestic ferrous metallurgy system as well as into provision of ties between science and production plants shown. Main purpose of the journal is encouragement of innovation, fundamental and application investigations in the areas of improving ofmetallurgical equipment and technologies, provision of scientists and specialists of plants and organizations of steel industry and adjacent industries, professors, teachers and post-graduators of high schools by proved and reliable information about results of most promising and original investigations in areas of steel industry and metallurgical machine-building, by technical, economic and statistical information about results of domestic and world steel industries, knowledge on publications in the foreign periodic on scientific and technical subjects of the industry. The most important tasks of the journal are as follows: publication on the journal pages results of original scientific investigations and research and technical developments in the area of improving equipment and technology of metallurgical  production in the main stages of domestic and foreign steel industry; summarizing of results of scientific investigations and practical achievements at their implementation at plants of domestic and foreign steel industry; identification and promotion of perspective directions of scientific investigations; forming of atmosphere of open scientific discussion, stimulation of discussions; assistance to propagation of achievements of different scientific schools, publication of information about forthcoming scientific conferences, symposia, seminars and about their results. During the past 75 years from the Bulletin“Ferrous metallurgy” creation time, total 1432 issues of it were published.","PeriodicalId":259995,"journal":{"name":"Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133577159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Problems of implementation of best available technologiesat industrial plants","authors":"N. Tsarev, V. Aksenov","doi":"10.32339/0135-5910-2019-3-373-378","DOIUrl":"https://doi.org/10.32339/0135-5910-2019-3-373-378","url":null,"abstract":"After the changes to the Federal law “On environment protection” came into force, the plants having considerable negative impact on environment, including plants of steel industry and non-ferrous metallurgy, from January 1, 2019 have to proceed to implementation of best available technologies. Among the problems, the information and analytical provision of such technologies implementation noticed. Formulation of “complex ecological permission” and “best available technology” (“BAT”) meanings considered. Items of registration considered, including order and terms, specified for BAT receiving, which substitutes the permission for emission of contaminants intoatmosphere, limits for contaminants emission, permission for contaminants discharge into environment, limits for contaminants discharge, norms for wastes formation and limits for their allocation. A list of supporting actions at implementation of measures on environment protection quoted, including state support ofactivity on BAT implementation and other measures decreasing negative impact on environment. Bureau of BAT elaborated information and technical reference books on BATs, which are available at internet-site http://burondt.ru/index/its-ndt.html. For steel industry and related industries list of the reference books on BATs recommended for familiarization. A reference to an electron resource, containing “List of main technological equipment, used at implementation of best available technologies” quoted. The document approved by the RF Government’ decree. Problems considered, related to BAT implementation, including absence of approved technological indices of BAT and incompleteness of list of equipment recommended for implementation.","PeriodicalId":259995,"journal":{"name":"Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information","volume":"195 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116140378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of hot briquetted iron secondary oxidation speed aimed at forecasting of its metallurgical value retention duration","authors":"A. Timofeeva, T. V. Nikitchenko, A. Kozhukhov, N. Mazur","doi":"10.32339/0135-5910-2019-3-322-326","DOIUrl":"https://doi.org/10.32339/0135-5910-2019-3-322-326","url":null,"abstract":"Hot briquetted iron (HBI), as also metallized pellets, undergo oxidation during transportation and storing. To forecast acceptable duration of HBI storing with metallurgical value retention it is important to have scientifically based data on the briquettes secondary oxidation speed. Methods of determining metallized pellets secondary oxidation speed are presented in domestic and foreign practice, but the matter of HBI secondary oxidation in scientific and technicalliterature practically is not covered. To determine HBI secondary oxidation speed two methods elaborated and tested at the Department of metallurgy and metal science of Stary Oskol Technological Institute after A.A. Ugarov (branch of National Research Technological University “MISiS”). The first– weighting method – based on determining of metal iron content change in HBI during a long term storing. During the experiment the mass of each briquette was weighted every 12 h within a month. The result of metal iron content determining by the experiment and by a chemical analysis had a difference of less than 1%. The weighting method enables to obtain the HBI reaction ability values without particular expenses, but requires carrying out long term enough experiments untilcomplete moisture removal out of the studied samples. The other method – determination of oxygen absorption speed bybriquettes in a closed vessel. It enables determining the reaction ability of the reduced iron within a comparatively short period, enables sufficient reliability duringthe briquettes testing. Based on it a methodology elaborated for determining of HBI secondary oxidation speed, meeting the requirements of real production. During loading-unloading operations, briquettes can partially go to ruin. The forming fragments of different sizes undergo a higher degree of oxidation that decreases the HBI metallurgical value. In view of this, studies of HBI oxidation speed continue depending on different sizes content and finalization of the methodology of determination of HBI secondary oxidation speed.","PeriodicalId":259995,"journal":{"name":"Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127111161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of electromagnetic stirring system at modernization ofhorizontal continuous caster","authors":"S. Shakhov, K. Vdovin, Yu. M. Rogachikov, D. Shakhov","doi":"10.32339/0135-5910-2019-3-344-349","DOIUrl":"https://doi.org/10.32339/0135-5910-2019-3-344-349","url":null,"abstract":"Horizontal state of mold at continuous casting of steel in horizontal continuous casters (HCC) complicates the melt supply conditions and forming of billets, results in disturbing ofcasting process stability, in forming of zones of chemical and physical inhomogeneity, distortion of the billet geometric form, arising of longitudinal fractures, bleeding at the mold exit. A possibility to increase the quality of the billets, produced at HCCs relates to changing of conditions of the metal solidification, creation of forced melt movement, in particular, by application of electromagnetic field. To increase the casting stability andimprove quality of the billets from alloyed steels a modernization of a HCC accomplished. Within the modernization a system of electromagnetic stirring (EMS) for modernizedmold of the HCC was developed. The modernized mold for horizontal casting is equipped by a build-in two-phased stator of alternative current. The two phased EMS stator built-in into the mold shell, supplied by power from two-phased frequency convertor, developed and manufactured by “Electroprivod i silivaya electronica” LLC (Moscow). A water immersion winding is the main element of the EMS stator. The winding isolation resistance at the first stage of the water immersion stator running was more than 500 m ohm. The technology of the winding manufacturing provides a high coefficient of heat exchange between the copper wires and technical water, usedfor direct cooling. By this, high values of the winding magnetizing force is reached at a small volume that in its turn provides a wide range of stirring intensity control. The developed EMS system enables to decrease considerably the existing drawbacks of HCC.","PeriodicalId":259995,"journal":{"name":"Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127376839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamics control in pipe cold rolling mill main drive","authors":"S. Rakhmanov","doi":"10.32339/0135-5910-2019-3-355-364","DOIUrl":"https://doi.org/10.32339/0135-5910-2019-3-355-364","url":null,"abstract":"Elimination of unstable and critical states of deformed systems of pipes pilger cold rolling mill, heavy-loaded equipment of which functions under conditionsof increase dynamic loads, is mainly intended for mechanic system dynamics stabilization until the accepted level of loading. Active mechanicties in the initial dynamic model revealed, which stipulate the demonstration of pronounced parametric processes in the studied system of pipes cold rolling mill main driver. Analysis of reasons of parametric oscillations originating carried out for systems of pipes cold rolling mill main driver. Zones of dynamic instability of mechanic system functioning according to Eins–Strett diagram determined, that enable to make the choice of passive optimal rolling regimes at the stage of technological processes designing of pipes pilger cold rolling.A system of active control by main driver of pipes cold rolling mill elaborated based on its mathematical model. A structure of optimal control by angular oscillations driver line elements of pipes cold rolling mill selected and parameters ofactive control impacts of the automated servo control system determined. A mechanism of optimal control by dynamic state ofdriver line elements of pipes cold rolling mill proposed. Also proposed an outline of critical and instablestates elimination for the main driver line driver of pipes cold rolling mill, which is realized by means of adaptive active automated servo control facility. The modernized main driver line of pipes cold rolling mill is equipped by facilities and control systems, enabling to switch the initial mechanic system from a critical state into a zone ofdesired states in a servo regime. Sensors of threshold moments level of elasticity forcesare installed on the drive shaft of main driver of pipes cold rolling mill. During the drive shaft angular elastic oscillations, comprising of actual and desired parameters of mechanicsystem is made based on sensors signals. Next, a correspondent control impact is formed based on algorithm embedded into the electric drive servo control system. When the displayed point of the drive shaft reaches the desired area of system dynamic stability, the active drive control is switched off. If further the disturbing load, applied from the side of deformation seat, makes the drive line dynamic characteristics off the desired status, then the dynamic system control process is repeated in anautomated mode. Reliability of the results received confirmed by calculation example and experiments at the main driver of pipes cold rolling mill ХПТ-32.","PeriodicalId":259995,"journal":{"name":"Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114744020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of properties of cored wire based on ferrochrome gas-cleaning dust","authors":"N. Kozyrev, A. A. Usol’tsev, A. Prudnikov, R. Kryukov, A. Mikhno","doi":"10.32339/0135-5910-2019-3-365-372","DOIUrl":"https://doi.org/10.32339/0135-5910-2019-3-365-372","url":null,"abstract":"Applying of wear-resistant alloyed coatings by build-up welding is one of methods to provide high operation properties of technological, metallurgical in particular equipment. Technologies of strengthening by direct alloying or reducing of alloying materials from oxide phases by reducing agent directly in the arc during building-up are most efficient ones. For build-up, cored wires are used frequently nowadays. A possibility to manufacture cored wires based on ferrochrome production gas-cleaning dust and powders of silicon, aluminum, and aluminum production gas-cleaning dust as reducing agents considered. Chemical composition and relation between cored wires components quoted. Manufacturing of 5 mm diameter wire accomplished at laboratory facility by running through draw plate. Duringestimation of efficiency of the manufactured cored wires application a regime of build-up was selected, study of chemical composition of built-up metal carried-out, wearing tests made, measuring of built-up samples hardness carried-out. Coefficients of chrome recovery coefficient at different relation between filling materials were calculated. Statistical processing of the study results accomplished statistical dependences of components content influence onthe built-up layer properties plotted. Study of the built-up showed, that chrome recovery in the built-up layer depends completely on the cored wire filling coefficient. At that under other conditions being equal, the hardness always correlates with the wear, and increase of chrome concentration results in reduction of the surface wear. Dependents of mass share elements comprising the cored wire content on built-up layer hardness and its wear resistance determined. The dependences obtained can be used for forecasting of builtup layer hardness and its wear resistance while built-up metal chemical composition varying.","PeriodicalId":259995,"journal":{"name":"Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123915946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Elaboration of a technology for production conditional ilmenite concentrate by enrichment of titanium-magnetite ores","authors":"E. Degodya, O. P. Shavakuleva","doi":"10.32339/0135-5910-2019-5-572-576","DOIUrl":"https://doi.org/10.32339/0135-5910-2019-5-572-576","url":null,"abstract":"The titanium-magnetite ores keep an important place among complex iron-containing ores. Utilization of these ores, comprising ores of Kopanskoe deposit, in steel industry is a serious problem, requiring for its solving enrichment resulting in obtaining iron-vanadium and ilmenite concentrates. A principal flow-chart of titanium-magnetite ores enrichment with obtaining conditional iron-vanadium and ilmenite concentrates elaborated. Results of flotation tests of non-magnetic fraction of Kopanskoe deposit titanium-magnetite ores, which is difficult for concentration. Application of flotation process for Kopanskoe deposit titaniummagnetite ores enrichment, which is difficult for concentration, enables not only to improve the enrichment indices, but considerably simplify the process chain of the plant equipment by excluding a big number of gravitational facilities. It was shown, that ilmenite and rutile flotation is successfully carried out in an acidic environment with the use of oleic acid, kerosene, sodium fluoride, sulfuric acid, foam activator VKP. The elaborated reagent complex provides obtaining conditional ilmenite concentrate. As a result of enrichment by application the elaborated magnetic flotation technology, iron-vanadium concentrate with a mass fraction of iron equal to 63.4 % and titanium dioxide – 4.5 % as well as ilmenite concentrate with a mass fraction of titanium dioxide equal to 45.2% obtained. The elaborated technology can be used for titanium-magnetite ores of Medvedevskoe, Kusinskoe, Chernorechenskoe deposits.","PeriodicalId":259995,"journal":{"name":"Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115531585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of a possibility of enrichment of fine-crushed magnetite ore by dry magnetic separation","authors":"N. V. Sedinkina, O. Gorlova, N. Gmyzina, E. Degodya","doi":"10.32339/0135-5910-2019-5-564-571","DOIUrl":"https://doi.org/10.32339/0135-5910-2019-5-564-571","url":null,"abstract":"Dry magnetic separation (DMS) enables to separate the non-magnetic fraction of iron ores at the initial stage of their concentration and therefore to decrease cost of their further processing. However, a considerable amount of metal is lost in DMS tails at that. The efficiency of DMS considerably depends on difference between the upper and lower limits of the ore coarseness) ore coarseness range), delivered for concentration. At the Magnitogorsk steel-works crushing and concentration plant No. 5 this range is from 50 mm up to 15 mm. To determine the optimal ore size, delivered to DMS, studies accomplished to determine the specific magnetic susceptibility of the magnetite and the burden for the magnetite ore of Maly Kuibas deposit. After the study of different size iron ore separation, a reasonability of the DMS feed size decreasing down to 30–7 mm shown. A possibility to obtain additional product of 7–0 mm size determined, suitable for sintering. It will enable to decrease the amount of material, delivered for crushing and wet magnetic separation, as well as to decrease expenses for transporting and storage of wet separation tails. Peculiarities of fine magnetite ore processing by DMS in a suspended state considered, optimal parameters of the separator determined and its high efficiency for magnetite ore of 7–0 mm size concentration shown.","PeriodicalId":259995,"journal":{"name":"Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115261742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of BOF slags properties with the purpose of their utilization technology perfection","authors":"N. Gmyzina, N. Sedinkina, O. Gorlova","doi":"10.32339/0135-5910-2019-5-623-631","DOIUrl":"https://doi.org/10.32339/0135-5910-2019-5-623-631","url":null,"abstract":"Actuality of steel-making slags utilization is stipulated not only by the necessity to improve ecology situation at the sites of slag piles, but also by a possibility to obtain additional raw materials for metallurgical production. Increase of the domestic iron-containing raw materials at Magnitogorsky steel-works can be done by more effective processing of steel-making slags. To improve the technology of BOF slags processing, a work done to study their chemical and mineral composition. It was established, that primary and secondary BOF slags are attributed to basic and ultra-basic, since the SiO2 mass share is less than 25–40%. Petrographic study results and data of IR-spectroscopy showed, that larnite, alite, monticellite and oxide RO-phase (Fe2+, Mn2+, Mg2+)O are main mineral components of the BOF slags. In many cases, the structure of the secondary BOF slags has middle-size grains, and the structure of primary slags is fine-grained. The texture of the secondary and primary slag is more often massive. The BOF slags have globules of iron, the size of which varies from sub-millimeters up to 5 mm. Study of influence of various methods of BOF slag particles destruction on the degree of globules disclosure showed, that application of centrifugal-striking crushing facilities provides more selective globules disclosure comparing with other methods. It was proved, that dry magnetic separation in suspended state, due to its peculiarities, provides higher technological indices comparing with drum separator when separating fine slags even at increase material moisture up to 5%.","PeriodicalId":259995,"journal":{"name":"Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129304350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Estimation of a possibility to use the quantumchemical approach while selecting reagents for coals flotation intensification","authors":"N. Medyanik, E. Mullina, O. Mishurina, N. V. Derina, A. A. Turlina","doi":"10.32339/0135-5910-2019-5-577-582","DOIUrl":"https://doi.org/10.32339/0135-5910-2019-5-577-582","url":null,"abstract":"Decrease of mined coal quality results in deterioration of main quality characteristics of coal concentrates: ash content, moisture, calorific efficiency and sintering ability. Application of selective reagent modes of coals flotation is an effective method of solving the problem. Elaboration of the reagent modes should be based on a study of mechanism of reagents action on the coal surface. Study of the aromatic esters effect on the physicochemical and flotation properties of gas coals from the Komsomolets mine of the Kuznetsk coal basin accomplished. It was shown that the low natural floatability of gas coals is due to the significant energy unsaturation of their surface, in particular, the presence of large pores, oxygen-containing groups and mineral impurities. The results of quantum chemical calculations demonstrate that the electrophilic centres of the coal are formed due to the electron density shift to the oxygen atoms. It was determined that the hydrophobization of the coal surface can be achieved using reagents that have more rigid nucleophilic nature compared to water molecules. The study of the quantum-chemical characteristics of aromatic esters suggests that they can interact with electrophilic areas of the organic mass of coal through a charge-controlled mechanism with the formation of charge transfer complexes. Results of the study of the aromatic esters effect on the physicochemical properties of coals surface and calculation of quantum-chemical characteristics of compositions, simulating the organic coals mass and studied reagents, allow to make a conclusion about possibility to intensify the coals flotation process based on application the quantum-chemical approach at the reagents selection.","PeriodicalId":259995,"journal":{"name":"Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information","volume":"6 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120993523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}