Visnyk of Taras Shevchenko National University of Kyiv-Geology最新文献

{"title":"CURRENT STATE OF MINERAL BASE OF TITANIUM DEPOSITS OF UKRAINE","authors":"O. Ganzha, H. Kuzmanenko, T. Okholina, O. Remezova","doi":"10.17721/1728-2713.99.08","DOIUrl":"https://doi.org/10.17721/1728-2713.99.08","url":null,"abstract":"The current state of titanium deposits in the world and Ukraine's place in the world of titanium ore reserves are analyzed. The list of leading countries in terms of reserves of loose titanium-zirconium ores and the dynamics of production is given. There is no regularity of the ratio of countries in terms of reserves and countries in terms of production. A map of the countries to which Ukraine exports titanium raw materials and the dynamics of titanium dioxide prices over the past 5 years are presented. The list of available mining enterprises for enrichment and production of titanium products within Ukraine is given. The general characteristic of the mineral resource base of titanium of Ukraine with the map of the current state of ilmenite and complex zircon-ilmenite placers of the Ukrainian Placer Province is provided.","PeriodicalId":42798,"journal":{"name":"Visnyk of Taras Shevchenko National University of Kyiv-Geology","volume":"22 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79151871","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":"GEOCHEMICAL FEATURES OF COPPER PORPHYRY МINERALIZATION IN THE GOSHGARCHAYORE MAGMATIC SYSTEM (MUROVDAG ORE REGION, AZERBAIJAN PART OF THE LESSER CAUCASUS)","authors":"M. Mansurov","doi":"10.17721/1728-2713.99.07","DOIUrl":"https://doi.org/10.17721/1728-2713.99.07","url":null,"abstract":"The geochemical features of intrusive rocks and the surrounding rocks associated with porphyry copper mineralization in the Goshgarchay magmatic system were studied. Major factors of concentration of copper and copper-porphyritic mineralization in rocks of gabbro-diorite-granodiorite formation has been revealed. It has been established that the structure of this ore region was formed as a result of successive alteration of some deformation stages accompanied by development of fractures in intrusive massive, by dike intrusions, locks displacements along faults and the fractures composed of various mineral associations. Main ore components were defined and relations hips among elements were considered. Geochemical associations allowing the localization of the development area of mineralization have been analyzed in various formation stages of porphyry copper system according to the results of cluster analysis. In this study, Cu, Mo, Pb, Zn, Ag, Ni, Co, Mn, Ti, Cr, V, and Sr both in the surrounding rocks and in ore-bearing intrusive rocks were considered as stable elements. This group of elements can be regarded as indicator elements in porphyry copper. The results of the claster analysis show that the elements which are less characteristical for hydrothermal solutions (Mn, Ti, Cr, V, Sr) keep their freedom in all wallrocks and the existence of their grouping is probably associated with their transportation process from silicate rocks with surrounding basic-average content. The elements such as Cu, Mo, Ag, Pb and Zn which form free group are connected with the generation from the magmatic source in the course of crystallization differentiation process and exposure of rocks to the hydrothermal activity which is considered the source of these elements.The identification of reasons of the association of V with Cu and Zn and Pb with Fe group elements in the intrusive facies rocks is characterized with its uncertainty. The analysis of the schedule made according to the results of Cu and basic ore components (Mo, Ag, As, Bi, Gd, Co, Cr, Se, Ge, Li, Nb and etc.) in the ores of Goshgarchay deposit show their dependence on one another equally. The amount of Cu in the ores have Ag, As, Bi, Cd, Ce, Ge, Sr, Mo, Sb, Th and Ti positive correlation relationship, but it has negative correlation relationship with Co, Cr, Cs, La, Li, Pb, Rb, Ni, Nb and Zn. Direct dependence is observed for ore mass between concentrations of Cu, Mo, Pb, Zn, Ag, Se, Te and other elements in the Goshgarchay porphyry copper deposit. Three various mineral associations differing from one another participate in stock work type copper-porphyry mineralization: 1) primary sulfide minerals; 2) oxidized ores; 3) primary sulfide minerals significantly enriched with products of hydrothermal ore carrying solutions.","PeriodicalId":42798,"journal":{"name":"Visnyk of Taras Shevchenko National University of Kyiv-Geology","volume":"60 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83739801","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":"GOLD PLACERS IN THE SOUTH OF UKRAINE – CURRENT VIEWS AND PROSPECTS","authors":"I. Lomakin, E. Sarvirov, V. Kochelab, R. Medvedskij","doi":"10.17721/1728-2713.98.09","DOIUrl":"https://doi.org/10.17721/1728-2713.98.09","url":null,"abstract":"The consistently high level of world gold prices against the background of depletion of reserves with easily extracted metal, lead to the need to introduce the industrial development of deposits with low-tech ores and sands. This requires improving the methodology of exploration and the use of efficient technologies for the enrichment and extraction of gold. The article is devoted to an important problem - the question of the real potential of placer gold in the south of Ukraine and its practical significance. An attempt is made on the basis of the analysis of the accumulated geological information to assess the quality of previously obtained results on loose gold of Ukraine. According to geological data, numerous manifestations of loose gold of various scales associated with sedimentary strata of Meso-Cenozoic sediments are widespread on the territory. It is noted that the geological study of placers in Ukraine was suspended during the lowest world gold prices - in the late 90's of last century - as a result of which many promising areas were left out. The authors refute the assertion that gold deposits on the Ukrainian Shield and in the Northern Black Sea Coast are of no industrial importance due to their low gold content. The negative assessment of placer gold content is due to the shortcomings of the methodology and test methods that were used in the work. The previously used exploratory model of \"classic\" gold placers does not correspond to the real properties of gold-bearing deposits in the sedimentary stratum. The predominant mass of gold of indigenous springs and placers of Ukraine belongs to small and thin classes of particle size distribution, and gold-bearing deposits have high clay content. In this regard, the deposition of gold occurred, as a rule, not in the subglacial part of the section of river valleys, but in the so-called \"oblique\" facies, which were almost not studied previously. The test used a mining method of gold extraction, which is not suitable for reliable determination of the gold content of small and fine grades. This led to a systematic underestimation of the gold content in the studied manifestations, as well as a significant reduction in the size of gold deposits. Therefore, a reassessment of previously obtained geological data is needed to determine the objective characteristics of the distribution and actual gold content in placers. Suggestions for further study of placers are given. Modern approaches to forecasting, studying and testing placers are considered, in particular, the use of data from remote sensing of the Earth, GIS-technologies and methods of neotectonic analysis for forecasting and searching for placers. The need to use separate determination of gold content depending on the particle size is emphasized.","PeriodicalId":42798,"journal":{"name":"Visnyk of Taras Shevchenko National University of Kyiv-Geology","volume":"13 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87325958","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":"STATISTICAL SIMULATION OF RANDOM FIELD ON 2D AREA WITH GENERALIZED GNEITING TYPE CORRELATION FUNCTION IN THE GEOPHYSICAL PROBLEM OF ENVIRONMENT MONITORING","authors":"Z. Vyzhva, V. Demidov, A. Vyzhva","doi":"10.17721/1728-2713.98.11","DOIUrl":"https://doi.org/10.17721/1728-2713.98.11","url":null,"abstract":"Due to the increasing number of natural and technogenic disasters the development of geological environment monitoring system is actual using modern mathematical tools and information technology. The local monitoring of potentially dangerous objects is an important part of the overall environment monitoring system. Complex geophysical research was conducted on Rivne NPP area. Among these monitoring observations radioisotope study of soil density and humidity near the perimeter of buildings is of the greatest interest. In this case a problem was occurred to supplement simulated data that were received at the control of chalky strata density changes at the research industrial area with use of radioisotope methods on a grid that included 29 wells. This problem was solved in this work by statistical simulation method that provides the ability to display values (random field on a plane) in any point of the monitoring area. The chalk strata averaged density at the industrial area was simulated using the built model and the involvement optimal in the mean square sense correlation function generalized Gneiting type. In this paper the method is used and the model and procedure were developed with enough adequate data for generalized Gneiting type correlation function. The model and algorithm were developed and examples of karst-suffusion phenomena statistical simulation were given in the problem of density chalk strata monitoring at the Rivne NPP area. The statistical model of averaged density chalk strata distribution was built in the plane and statistical simulation algorithm was developed using generalized Gneiting type correlation function based on spectral decomposition. The research subject realizations were obtained with required detail and regularity at the observation grid based on the developed software. Statistical analysis of the numerical simulation results was done and tested for its adequacy.","PeriodicalId":42798,"journal":{"name":"Visnyk of Taras Shevchenko National University of Kyiv-Geology","volume":"19 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84825051","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":"EFFICIENCY ASSESSMENT OF REMEDIATION ACTIONS IN THE SITE OF SUBSURFACE CONTAMINATION WITH PETROLEUM PRODUCTS WITHIN THE FUEL AND LUBRICANTS WAREHOUSE OF BORYSPIL AIRPORT","authors":"O. Shpak, R. Havryliuk, O. Lohvynenko","doi":"10.17721/1728-2713.96.11","DOIUrl":"https://doi.org/10.17721/1728-2713.96.11","url":null,"abstract":"This paper is devoted to the topical problem of remediation of the subsurface contaminated with petroleum products. Subsurface contamination with petroleum products on the territory of the fuel and lubricants warehouse of Boryspil Airport in the form of the aviation kerosene lens has occured for a long time. Remediation works on the removal of mobile petroleum products and contaminated groundwater, which were carried out at the research site, did not allow to completely eliminate contamination. To determine the efficiency of liquidation pumping of mobile petroleum products and groundwater, the volume and state of petroleum products in soil and their transformation under the influence of groundwater level fluctuations were assessed. Using the method we developed, the minimum value of the thickness of a petroleum product layer in a well, at which mobile petroleum products are absent in soil and liquidation pumping becomes inefficient, was calculated,. According to the monitoring data and calculation of the kerosene volume in the lens, liquidation pumping on the contaminated area led to the stabilization of contamination spreading and reduction of the aviation kerosene lens area.","PeriodicalId":42798,"journal":{"name":"Visnyk of Taras Shevchenko National University of Kyiv-Geology","volume":"11 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79739394","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 MEASURES TO INCREASE THE ECOLOGICAL SAFETY OF DRINKING WATER SUPPLY FOR POPULATION OF EASTERN UKRAINE DUE TO THE USE OF BUCHAK-KANIV AQUIFER GROUNDWATER","authors":"S. Levoniuk, I. Udalov","doi":"10.17721/1728-2713.99.11","DOIUrl":"https://doi.org/10.17721/1728-2713.99.11","url":null,"abstract":"In the article, measures to increase the ecological safety of population drinking water supply due to the use of Buchak-Kaniv aquifer groundwater from urban water intakes in Eastern Ukraine have been developed. The ecological consequences of man-made intervention in Buchak-Kaniv aquifer drinking groundwater at the research territory have been assessed. The main pollutant elements of these groundwater have been traced. Water intakes (Poltava, Karlivka, Krasnograd, Lubny, Khorol, Reshetylivka), where the ecological consequences of technogenic intervention in the underground hydrosphere are the greatest, since here the target groundwater is partially or completely unsuitable for drinking purposes, have been identified. The key role of technogenesis (intensification of groundwater withdrawal and expansion of water intakes network; as a result – changes in the hydrodynamic conditions of operational aquifers and formation of their regional depression funnels) in these processes has been established. It is emphasized that the increased content of investigated pollutant elements in systematically consumed drinking water has a colossal effect on the human body, which can be expressed in a number of serious diseases. In the paper, measures have been developed to minimize the established ecological consequences of technogenesis of Buchak-Kaniv aquifer drinking groundwater to increase the ecological safety of population drinking water supply from the Poltava city agglomeration water intakes, which are strategically important for the studied region. The system of groundwater hydrogeochemical monitoring at the region water intakes has been improved for the conditions of filtration of pollutants from the surface or their migration from below in the zones affected by tectonic faults associated with salt diapirs. This significantly shortens the time and reduces the cost of works in comparison with a full complex of hydrogeochemical studies within the entire territory. The allocation of promising areas for the construction of new water intakes to solve the problem of drinking groundwater lack of acceptable quality within the research territory has been substantiated. Estimated resources of high-quality drinking groundwater in a radius of 40 km around the Poltava city, the involvement of which will allow providing high-quality drinking water to the population of this urban agglomeration. The optimal general water withdrawal at the Poltava water intakes to stabilize the content of polluting elements in the composition of Buchak-Kaniv aquifer groundwater within different parts of the city has been justified.","PeriodicalId":42798,"journal":{"name":"Visnyk of Taras Shevchenko National University of Kyiv-Geology","volume":"40 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88610239","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":"PETROCHEMICAL TYPIZATION OF METAPSEFITES-METAPSAMMITES OF THE UKRAINIAN SHIELD AND ITS SIGNIFICANCE FOR LITHOGENETIC RECONSTRUCTIONS AND INTER-REGIONAL STRATIGRAPHIC CORRELATIONS","authors":"V. Pokalyuk, M. Korzhnev","doi":"10.17721/1728-2713.96.08","DOIUrl":"https://doi.org/10.17721/1728-2713.96.08","url":null,"abstract":"Petrochemical comparison of highly metamorphosed conglomerate-like rocks of the Early Precambrian of the Ukrainian Shield of questionable age and genesis (problem objects) with reference weakly metamorphosed metapsephites-metapsammites of the Paleoproterozoic of the Kryvyi Rih basin provides important additional material for judging the initial nature of highly metamorphosed objects and their probable correlative stratigraphic position. Problem objects on a series of petrochemical diagrams are clearly divided into two separate groups. The first group includes psephitepsammite-like quartzites of the Dibrovsky and Mariupol areas of the Azov Region; petrochemically, they correspond to the Skelevatian reference trend – a highly mature petrochemical type of coarse terrigenous sediments of the lower part of the Paleoproterozoic. The second group unites conglomerate-like gneisses and crystalline schists of the Radomyshl area of the Teterivska Group, of the vicinity of Pervomaisk and the confluence of the Velyka Vys, Hirskyi Tikych, Hnylyi Tikych rivers, metapsefites-metapsammites of the Zvenigorod-Shpolyansk area, as well as Ingul metapsammitous-metaalevritous gneisses. This group is in good agreement with the Gleyevat reference trend, an immature sub-greywacke petrochemical type of sediments of the upper Paleoproterozoic.","PeriodicalId":42798,"journal":{"name":"Visnyk of Taras Shevchenko National University of Kyiv-Geology","volume":"45 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88085191","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":"CONDITIONS FOR THE FORMATION OF AQUIFERS QUALITATIVE STATE IN THE SOUTHERN BUG RIVER BASIN","authors":"N. Lyuta, І. Sanina","doi":"10.17721/1728-2713.99.10","DOIUrl":"https://doi.org/10.17721/1728-2713.99.10","url":null,"abstract":"Ukraine implements the principles of integrated water resources management according to the basin principle as stipulated by the EU Water Framework Directive. River basins are considered as integral multi-component systems and management plans are developed for them, which contain analysis of water resources existing state and measures for achievement of good condition of surface and groundwaters. Therefore, an objective assessment of the current state of groundwater and consideration of the conditions of its formation becomes particularly important. The purpose of this article is the analysis of natural and anthropogenic conditions of groundwater formation within the Southern Bug basin. Southern Bug basin with the area of 63 700 km2 is the only river basin of the I order, which is completely located within Ukraine, on the territory of seven administrative regions. Due to the diversity of structural-geological and physical-geographical conditions of different parts of the basin, groundwater resources are distributed unevenly. The natural conditions of groundwater resources formation, their protection from pollution are analyzed and anthropogenic pressure is briefly characterized. The existing state of groundwater and its changes in space and time are evaluated. Changes in the quality of groundwater of the principle aquifers during the water intakes operation have been analyzed. The priority of natural factors in the formation of groundwater qualitative state has been established. The research results will be used during groundwater monitoring in the territory of the Southern Bug basin.","PeriodicalId":42798,"journal":{"name":"Visnyk of Taras Shevchenko National University of Kyiv-Geology","volume":"19 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85799347","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":"PROSPECTS OF INDUSTRIAL ORE-BEARING OF ZHYRYCHI ORE OCCURRENCE","authors":"V. Mykhailov, M. Kurilo, O. Andreeva, S. Shnyukov","doi":"10.17721/1728-2713.97.09","DOIUrl":"https://doi.org/10.17721/1728-2713.97.09","url":null,"abstract":"Based on the analysis of geological exploration materials, geological and economic reassessment of the copper ore occurrence in Zhyrychi (Volyn ore region) was carried out, including the recalculation of reserves and unproved resources. As it turned out, during the exploration process, the reserves and unproved resources were significantly exaggerated, which misleads potential investors. This was primarily due to the wrong interpretation of the geological structure of the deposit, shape and size of ore bodies. The considerable horizontal length of ore bodies, which at a thickness of 1–3 m extend for several kilometers (up to 4–5 km), raises great doubts. In our view, they are represented mainly by lenticular bodies of relatively short length (the first tens up to the first hundreds of meters). According to our calculations, the unproved resources of copper of category P1 are 220.4 thousand tons, which is four times smaller than in the relevant exploration materials. Reserves of copper of category C2 and the unproved resources of precious metals should be excluded from the calculation as unreasonable and unreliable. The calculation of technical and economic indicators of copper-ore occurrence in Zhyrychi indicates the weak economic efficiency of its probable operation, which should be taken into account when considering investing in this object.","PeriodicalId":42798,"journal":{"name":"Visnyk of Taras Shevchenko National University of Kyiv-Geology","volume":"47 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82231929","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":"GEOECOLOGICAL MAPS QUALITY ASSURANCE AT THE STAGES OF CREATION AND USE","authors":"Dmytro Liashenko, I. Tsiupa, V. Babiy, V. Chekhniy","doi":"10.17721/1728-2713.99.12","DOIUrl":"https://doi.org/10.17721/1728-2713.99.12","url":null,"abstract":"A geoecological maps quality assurance scheme during the map life cycle has been developed. The main methodological tools of research are conceptual modeling and the method of expert assessments. The work traces approaches to the formation of map quality concepts and their evaluation: utilitarianism, consequentialism, welfareism, the principle of ecological value. The importance of ensuring the quality of geoecological maps at all stages of the product's life cycle has been given. The main methodological technique is the developed algorithmic model. The approaches, algorithm and groups of criteria for the quality of geoecological maps researching are defined: the internal quality of map data (from the producer's point of view), indicators of the external quality of maps (from the consumer's point of view), in particular technological, consumer criteria, scientific and social value of maps. In the course of experimental studies, a methodology for evaluating a number of consumer characteristics of geoecological maps was proposed. The expert analysis of the factors affecting the assessment of maps quality has been conducted. The hierarchy of the factor importance is built in the following sequence: effective color use, sufficient contrast of the image, composition (size and placement of map elements), text on a map. The work formulates features of ensuring the quality of geoecological maps during their creation and increasing the efficiency of their use. Prospects for the further assurance development lie in the deepening of the integral theory of the assessment of the quality of maps focused on the application of a propositional scheme for the assessment of various groups of maps.","PeriodicalId":42798,"journal":{"name":"Visnyk of Taras Shevchenko National University of Kyiv-Geology","volume":"42 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82695858","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}