Engineering & Technologies最新文献

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Study wetting coal dust fraction of particles of surfactant solutions 研究润湿煤粉颗粒对表面活性剂溶液的影响
Engineering & Technologies Pub Date : 2017-12-01 DOI: 10.17516/1999-494X-2017-10-8-975-984
I. Elkin, Igor B. Istomin
{"title":"Study wetting coal dust fraction of particles of surfactant solutions","authors":"I. Elkin, Igor B. Istomin","doi":"10.17516/1999-494X-2017-10-8-975-984","DOIUrl":"https://doi.org/10.17516/1999-494X-2017-10-8-975-984","url":null,"abstract":"The results of experimental studies and theoretical basis for wetting solutions surfactants coal particles of small size fractions. On the basis of a physical model on experimental experience shows wetting of the coal particles, resulting from pulverized coal lumps pulverized state to substantially change the structural and surface properties of the coal, which leads to a substantial change in the mechanical, physical and chemical properties of coal.","PeriodicalId":11548,"journal":{"name":"Engineering & Technologies","volume":"110 1","pages":"975-984"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87715539","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}
引用次数: 1
Computer Model Heat Exchange of the Continuous Casting and Extrusion Non-Ferrous Metals 有色金属连铸和挤压的计算机模型热交换
Engineering & Technologies Pub Date : 2017-09-17 DOI: 10.17516/1999-494x-2017-10-8-1019-1030
A. Potapenko, A. Skuratov
{"title":"Computer Model Heat Exchange of the Continuous Casting and Extrusion Non-Ferrous Metals","authors":"A. Potapenko, A. Skuratov","doi":"10.17516/1999-494x-2017-10-8-1019-1030","DOIUrl":"https://doi.org/10.17516/1999-494x-2017-10-8-1019-1030","url":null,"abstract":"Based on the software complex Ansys CFX, a three-dimensional computer model of complex heat transfer in a continuous casting and pressing of non-ferrous metals has been developed. The features of constructing a computational grid and solving the system of differential energy equations for the processed metal and the elements of the installation are considered. The dynamics of the process of casting and pressing of aluminum alloy on an experimental laboratory installation is studied. Calculated temperatures of the metal and elements of the prototype of the installation are determined. An experimental estimation of reliability of modeling results is carried out and adequacy of the developed computer model is shown.","PeriodicalId":11548,"journal":{"name":"Engineering & Technologies","volume":"25 1","pages":"1019-1030"},"PeriodicalIF":0.0,"publicationDate":"2017-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84783854","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}
引用次数: 0
The life cycle information support technologies of the onboard radio-electronic equipment of the missile and space engineering 导弹与空间工程机载无线电电子设备生命周期信息保障技术
Engineering & Technologies Pub Date : 2017-03-21 DOI: 10.17516/1999-494X-2017-10-3-364-371
S. Kochura, V. Shkolniy, S. B. Suntsov, E. Morozov, Oleg A. Klimkin, V. M. Karaban
{"title":"The life cycle information support technologies of the onboard radio-electronic equipment of the missile and space engineering","authors":"S. Kochura, V. Shkolniy, S. B. Suntsov, E. Morozov, Oleg A. Klimkin, V. M. Karaban","doi":"10.17516/1999-494X-2017-10-3-364-371","DOIUrl":"https://doi.org/10.17516/1999-494X-2017-10-3-364-371","url":null,"abstract":"On the example of the onboard radio-electronic spacecraft’s equipment creation are presented results of development and approbation of a technical and information solutions of “the electronic enterprise” of missile-space branch and the industry standard RD-134-0184-2010 “The methodical recommendations for implementation of information support technologies of the onboard radio-electronic equipment’s creation of the missile and space engineering at all stages of life cycle” which includes recommendations about the organization of “the electronic enterprise” and to a choice program and hardware. Results of work are introduced in process of design of onboard radio-electronic spacecraft’s equipment of the JSC “ISS” and allow to increase efficiency and competitiveness of the production, to reduce costs of purchase of program and technical providing, to reduce time of creation of onboard radio-electronic equipment of the missile and space engineering by 1,3 times, to reduce material expenses by 1,25 times.","PeriodicalId":11548,"journal":{"name":"Engineering & Technologies","volume":"32 1","pages":"364-371"},"PeriodicalIF":0.0,"publicationDate":"2017-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90188966","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}
引用次数: 0
ANALYSIS OF INFLUENCE OF MODES FOR WIRE SAWS EFFICIENT EXTRACTION OF NATURAL STONE BLOCKS 模式对线锯高效提取天然石料的影响分析
Engineering & Technologies Pub Date : 2016-10-03 DOI: 10.17516/1999-494x-2015-8-7-928-940
Maxim Sergeevich Ylyakov
{"title":"ANALYSIS OF INFLUENCE OF MODES FOR WIRE SAWS EFFICIENT EXTRACTION OF NATURAL STONE BLOCKS","authors":"Maxim Sergeevich Ylyakov","doi":"10.17516/1999-494x-2015-8-7-928-940","DOIUrl":"https://doi.org/10.17516/1999-494x-2015-8-7-928-940","url":null,"abstract":"The dependences of the main parameters of the cutting process (performance, power consumption and diamond tools) on the mode of wire saw at different heights quarry face. The technique of choosing the rational mode control cable saw, taking into account the dependence of performance established branch of the monolith from the array and operating costs for his department, depending on the height of the ledge. To be able to select the sound mode control cable saw proposed a comprehensive technical and economic indicators, characterized costs charged to the intensity of space capacity of stone from the array.","PeriodicalId":11548,"journal":{"name":"Engineering & Technologies","volume":"12 1","pages":"928-940"},"PeriodicalIF":0.0,"publicationDate":"2016-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87341930","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}
引用次数: 0
Development and Research of the Innovative Production Technology of Multifunctional Invar Alloys New Generation 新一代多功能因瓦尔合金创新生产技术的开发与研究
Engineering & Technologies Pub Date : 2016-03-13 DOI: 10.17516/1999-494X-2016-9-5-744-749
M. Chukin, E. Golubchik, N. Koptseva, Y. Efimova, D. Chukin, E. Medvedeva
{"title":"Development and Research of the Innovative Production Technology of Multifunctional Invar Alloys New Generation","authors":"M. Chukin, E. Golubchik, N. Koptseva, Y. Efimova, D. Chukin, E. Medvedeva","doi":"10.17516/1999-494X-2016-9-5-744-749","DOIUrl":"https://doi.org/10.17516/1999-494X-2016-9-5-744-749","url":null,"abstract":"Recently materials on the basis of multipurpose alloys with special mechanical and physical properties are widely adopted for creation of equipment of new generation. Such materials include Invar alloys with a minimum value of thermal expansion with high strength characteristics and hardness. Results of complex researches on influence of the modes of heat treatment on formation of structure are presented in article on the example of an alloy 32NUFM. Normal 0 false false false RU X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:\"Обычная таблица\"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:\"\"; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:\"Calibri\",\"sans-serif\"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-fareast-language:EN-US;}","PeriodicalId":11548,"journal":{"name":"Engineering & Technologies","volume":"9 1","pages":"744-749"},"PeriodicalIF":0.0,"publicationDate":"2016-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80768625","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}
引用次数: 0
Импортозамещающие разделительные покрытия для пресс-форм литья под низким давлением 低压压压压压模用进口替代隔板
Engineering & Technologies Pub Date : 2016-03-13 DOI: 10.17516/1999-494X-2016-9-5-686-692
А. А. Косович, Т. Р. Гильманшина, Т. А. Богданова, Андрей Валерьевич Чеглаков, П. Ю. Барбицкий, С И Лыткина, Е Г Партыко
{"title":"Импортозамещающие разделительные покрытия для пресс-форм литья под низким давлением","authors":"А. А. Косович, Т. Р. Гильманшина, Т. А. Богданова, Андрей Валерьевич Чеглаков, П. Ю. Барбицкий, С И Лыткина, Е Г Партыко","doi":"10.17516/1999-494X-2016-9-5-686-692","DOIUrl":"https://doi.org/10.17516/1999-494X-2016-9-5-686-692","url":null,"abstract":"The results of development of release coatings of molds for casting light-alloy wheels under low pressure are presented. Efficiency of the developed coatings in comparison with the applied foreign analogs is shown; results of their industrial approbation are given. Normal 0 false false false RU X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:\"Обычная таблица\"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:\"\"; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:\"Calibri\",\"sans-serif\"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-fareast-language:EN-US;}","PeriodicalId":11548,"journal":{"name":"Engineering & Technologies","volume":"120 1","pages":"686-692"},"PeriodicalIF":0.0,"publicationDate":"2016-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87818662","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}
引用次数: 1
Development and experimental research of materials for forming stable bottom and side ledges 稳定底边壁架成形材料的开发与试验研究
Engineering & Technologies Pub Date : 2016-03-13 DOI: 10.17516/1999-494X-2016-9-5-617-631
G. Arkhipov, P. V. Poliakov, Evgeniy R. Shaydulin, Y. О. Avdeev, Геннадий Викторович Архипов, Павел Вениаминович Поляков, Евгений Рашидович Шайдулин, Ю.О. Авдеев
{"title":"Development and experimental research of materials for forming stable bottom and side ledges","authors":"G. Arkhipov, P. V. Poliakov, Evgeniy R. Shaydulin, Y. О. Avdeev, Геннадий Викторович Архипов, Павел Вениаминович Поляков, Евгений Рашидович Шайдулин, Ю.О. Авдеев","doi":"10.17516/1999-494X-2016-9-5-617-631","DOIUrl":"https://doi.org/10.17516/1999-494X-2016-9-5-617-631","url":null,"abstract":"The main purpose of this paper is to find a solution for saving energy in the cell room. Another purpose of the paper is to find materials suitable for stable side and bottom ledge formation, research the properties of such materials, and study their behavior in cryolite-alumina melts, including selection of the most suitable material. Moreover, the paper is concerned with energy consumption reduction by forming stable side and bottom ledges. Furthermore, as mentioned earlier, several materials have been selected to form stable side and bottom ledges during the post-start-up period. The properties of the selected materials have been analyzed.  Normal 0 false false false RU X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:\"Обычная таблица\"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:\"\"; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:\"Calibri\",\"sans-serif\"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-fareast-language:EN-US;}","PeriodicalId":11548,"journal":{"name":"Engineering & Technologies","volume":"17 1","pages":"617-631"},"PeriodicalIF":0.0,"publicationDate":"2016-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85083782","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}
引用次数: 0
Development of the Optimal Wastewater Treatment Technologies Refining of Precious Metals 贵金属冶炼废水处理工艺优化研究
Engineering & Technologies Pub Date : 2016-03-13 DOI: 10.17516/1999-494X-2016-9-5-703-713
Liudmila V. Biketova, Iurii N. Lisakov, Sergei D. Ershov
{"title":"Development of the Optimal Wastewater Treatment Technologies Refining of Precious Metals","authors":"Liudmila V. Biketova, Iurii N. Lisakov, Sergei D. Ershov","doi":"10.17516/1999-494X-2016-9-5-703-713","DOIUrl":"https://doi.org/10.17516/1999-494X-2016-9-5-703-713","url":null,"abstract":"The most widespread method in gold production is cyanide leaching of ore concentrates. Most of gold ore deposits in the Russian Federation are located in the Far North and Far East with their climate zone characterized by a positive water balance. In this regard, there arises a need to solve the problem of wastewater treatment. The process of cyanide removal is well known and proven in an industrial scale. The presence of nonferrous metal sulfides and iron in ore concentrates leads to an increased consumption of cyanides caused by thiocyanate production. As a result, gold mining companies have to solve the problem of neutralization of discharged water both in terms of cyanide and thiocyanates. The problem is currently particularly burning at Russia’s operations as requirements for cyanide and thiocyanate contents in treated effluents are virtually commensurate. This present paper summarizes the results of research in the field of treatment of wastewater containing, along with cyanides, a significant amount of thiocyanates. Our studies have shown high efficiency of the process of wastewater oxidation by ozone. It has been shown that the ozone oxidation process runs at high rate and is accompanied by cyanide regeneration. This saves more than fifty percent on the cost of ozone production, the latter being a major economic limiting factor for the application of this technology. The ozonation technology ensures the absence of secondary contamination by reagents and treated effluent intermediates. The developed method provides the compliance with the legislation requirements on the content of cyanides and thiocyanates in wastewater. Lower cost of the process resulted from the lack of reagents, and hence, cost of their purchase and delivery to gold mining operations, and a potential for cyanide regeneration make a proposed method very attractive. Normal 0 false false false RU X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:\"Обычная таблица\"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:\"\"; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:8.0pt; mso-para-margin-left:0cm; line-height:107%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:\"Calibri\",\"sans-serif\"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-fareast-language:EN-US;}","PeriodicalId":11548,"journal":{"name":"Engineering & Technologies","volume":"33 1","pages":"703-713"},"PeriodicalIF":0.0,"publicationDate":"2016-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75419234","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}
引用次数: 0
Lazar continuous carbon baking – the Future is now 拉扎尔连续碳烘烤——未来就是现在
Engineering & Technologies Pub Date : 2016-03-13 DOI: 10.17516/1999-494X-2016-9-5-693-702
N. Walla, Steven J Dubec, Rick Lazarou
{"title":"Lazar continuous carbon baking – the Future is now","authors":"N. Walla, Steven J Dubec, Rick Lazarou","doi":"10.17516/1999-494X-2016-9-5-693-702","DOIUrl":"https://doi.org/10.17516/1999-494X-2016-9-5-693-702","url":null,"abstract":"The Lazar Continuous Carbon Baking Furnace (CCBF) presents a groundbreaking new process for the baking of carbon anodes. A static thermal profile provides a consistent heat-up rate across distinct temperature zones, eliminating thermal cycling. Complete PAH destruction, combined with the lack of thermal cycling, eliminates refractory maintenance requirements and allows for tighter tolerances in pollution-control systems, leading to a significant decrease in operating costs. Costs to build a Lazar CCBF are estimated to be 35 to 45% less than conventional ring-type furnaces, with operating costs estimated to be approximately 60% less. Normal 0 false false false RU X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:\"Обычная таблица\"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:\"\"; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:\"Cambria\",\"serif\"; mso-ascii-font-family:Cambria; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Cambria; mso-hansi-theme-font:minor-latin; mso-ansi-language:EN-US; mso-fareast-language:EN-US;}","PeriodicalId":11548,"journal":{"name":"Engineering & Technologies","volume":"70 1","pages":"693-702"},"PeriodicalIF":0.0,"publicationDate":"2016-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79573123","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}
引用次数: 0
Possible Methods Recovery of Metals from Flotation Tailings Copper-Molybdenum Ores 从铜钼矿浮选尾矿中回收金属的可行方法
Engineering & Technologies Pub Date : 2016-03-13 DOI: 10.17516/1999-494X-2016-9-5-724-730
N. K. Algebraistova, A. S. Markova, I. V. Prokopiev, D. M. Kolotushkin
{"title":"Possible Methods Recovery of Metals from Flotation Tailings Copper-Molybdenum Ores","authors":"N. K. Algebraistova, A. S. Markova, I. V. Prokopiev, D. M. Kolotushkin","doi":"10.17516/1999-494X-2016-9-5-724-730","DOIUrl":"https://doi.org/10.17516/1999-494X-2016-9-5-724-730","url":null,"abstract":"800x600 In order to reduce losses of metal with tails cycle of collective flotation of copper-molybdenum ore deposits was performed a preliminary assessment of the effectiveness of enrichment tailings using gravity and flotation methods. The results showed the prospect of using both methods, but in the case of gravity separation is possible to extract valuable component without the addition of flotation reagents, which is beneficial to the process of selection of the bulk concentrate, as well as on the environment. Normal 0 false false false RU X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:\"Обычная таблица\"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:\"\"; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:\"Times New Roman\",\"serif\";}","PeriodicalId":11548,"journal":{"name":"Engineering & Technologies","volume":"100 1","pages":"724-730"},"PeriodicalIF":0.0,"publicationDate":"2016-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80699235","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}
引用次数: 0
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