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| 1 | A Comparison of Citation Disciplinary Structure in Science between the G7 Countries and the BRICS Countries显示文摘Purpose: This study aims to compare the characteristics of citation disciplinary structure between the G7 countries and the BRICS countries.Design/Methodology/Approach: In this contribution, which uses about 1 million Web of Science publications and two publications years(1993 and 2013), we compare the G7 countries and the BRICS countries with regard to this type of structure. For the publication year 2013, cosine similarity values regarding the citation disciplinary structures of these countries(and of nine other countries) were used as input to cluster analysis. We also obtained cosine similarity values for a given country and its citation disciplinary structures across the two publication years. Moreover, for the publication year 2013, the within-country JeffreysMatusita distance between publication and citation disciplinary structure was measured. Research limitations: First, the citation disciplinary structures of countries depend on multiple and complex factors. It is therefore difficult to completely explain the formation and change of the citation disciplinary structure of a country. This study suggests some possible causes, whereas detailed explanations might be given by future research. Second, the length of the citation window used in this study is three years. However, scientific disciplines differ in their citation practices. Comparison between citations across disciplines using the same citation window length may affect the citation discipline structure results for some countries.Practical limitations: First, the results of this study are based on the WoS database. However, in this database some fields are covered to a greater extent than others, which may affect the results for the citation discipline structure for some studied countries. In future research, we might repeat this study using another database(like Scopus) and, in that case, we would like to make comparisons between the two outcomes. Second, the use of a constant journal setyielded that a large share of the journals covered by WoS year 2013 is ignored in the study. Thus, disciplinary structure is studied based on a quite restricted set of publications. The three mentioned limitations should be kept in mind when the results of this study are interpreted.Originality/value: Disciplinary structure on country level is a highlighted topic for the S&T policy makers, especially for those come from developing countries. This study observes the disciplinary structure in the view of academic impact, and the result will provide some evidence to make decision for the discipline strategy and funding allocation. Besides, JeffreysMatusita distance is introduced to measure the similarity of citation disciplinary structure and publication disciplinary structure. By applying this measure, some new observations were drawn, for example, 'Based on the comparison of publication disciplinary structure and citation disciplinary structure, the paper finds most BRICS counties have less impact with more publications'.Findings: The outcome of the cluster analysis indicates that the G7 countries and BRICS countries are quite heterogeneous regarding their citation disciplinary structure. For a majority of the G7 countries, the citation disciplinary structure tend to be more stable compared to BRICS countries with regard to the years 1993 and 2013. Most G7 countries, with United States as an exception, turned out to have lower values on the Jeffreys-Matusita distance than BRICS countries, indicating a higher degree of heterogeneity between the publication and the citation disciplinary structure for the latter countries. In other words, BRICS countries still receive much less citations in most disciplines than their publication output would suggest. G7 countries can still expect more citations than is to be expected based on their publication output, thereby generating relatively more impact than BRICS countries. | Ting Yue Liying Yang Per Ahlgren Jielan Ding Shuangqing Shi Rainer Frietsch | 2018 | Journal of Data and Information Science2018，3，3： | 3 |
| 2 | Resource management in radio access and IP-based core networks for IMT Advanced and Beyond显示文摘The increased capacity needs, primarily driven by content distribution, and the vision of Internet-of-Things with billions of connected devices pose radically new demands on future wireless and mobile systems. In general the increased diversity and scale result in complex resource management and optimization problems in both radio access networks and the wired core network infrastructure. We summarize results in this area from a collaborative Sino-Swedish project within IMT Advanced and Beyond, covering adaptive radio resource management, energy-aware routing, OpenFlow-based network virtualization, data center networking, and access network caching for TV on demand. | SU Gang HIDELL Markus ABRAHAMSSON Henrik AHLGREN Bengt LI Dan SJDIN Peter TANYINGYONG Voravit XU Ke | 2013 | Science China(Information Sciences)2013，56，2： | 2 |
| 3 | 湖泊中与微生物转化有关的氮素消涨显示文摘本研究观测了2个富营养化湖泊中微生物氮素的变化趋势,并与流入和流出湖泊的氮素消长情况进行了比较。浮游植物的初级生产力主要取决于再生氮素(尤其取决于铵态氮)的多少。浮游菌通过吸收溶解的游离氨基酸来满足其一年中大部分时间内对氮素的需求,并将相当大的一部分用于有机氮的再生。使硝酸盐变成分子态氮的微生物脱氮作用以及在沉积物中的永久性持留,是水生生态系统中氮素损耗的最主要途径。湖泊沉积物中的脱氮的估测方法是利用硝酸盐中的^(15)N作示踪物,然后测定所产生氮气的^(15)N/^(14)N比率而估算,并与以消涨计算得到的估测值进行比较,这两种方法得出了同水平估测值。由铵盐硝化作用得到的硝酸盐,马上就被作为脱氮作用的原料。脱氮作用每年的损耗量是外源氮素输入量的5%—25%,此值位于先前报道的变化范围的下限。湖泊沉积物中的氮素永久持留量是外源氮素输入量的14%—33%。 | Ingemar Ahlgren Tomas Waara Katarina Vrede Fred Srensson 马焕成 | 1994 | 人类环境杂志1994，23，6： | 2 |
| 4 | A survey of informa- tion-centric networking 显示文摘 | Ahlgren B Dannewitz C Imbrenda C | 2012 | IEEE Communications Magazine2012，50，7： | 1 |
| 5 | Cost-effective biogas utilisation-A modelling assessment of gas infrastrucmral options in a regional energy system显示文摘 | B6rjesson M Ahlgren E O | 2012 | Energy2012，48，1： | 1 |
| 6 | Biogenic phosphorus in oligotrophic mountain lake sediments:differences in composition measured with NMR spectroscopy 显示文摘 | AHLGREN J REITZEL K DANIEESSON R | 2006 | Water Research2006，40，20： | 1 |
| 7 | Exopolysaccharide expression in Lactococcus lactis subsp, cremoris Ropy352: evidence for novel gene organization显示文摘 | KNOSHAUG E P AHLGREN J A TREMPY J E | 2007 | Applied and Environmental Microbiology2007，73，3： | 1 |
| 8 | Biomass gasification in cost-optimizeddistrict heating systems-A regional modelling analysis显示文摘 | BRJESSON M AHLGREN E O | 2010 | Energy Poli-cy2010，38，： | 1 |
| 9 | Seasonal dynamics of a cyanobacteria-dominated microbial community in surface sediments of a shallow, eutrophic lake显示文摘 | BOSTROM B PETTERSSON A-K AHLGREN I | 1989 | Aquat Sci1989，51，： | 1 |
| 10 | Content, connectiv- ity,and cloud:ingredients for the network of the future显示文摘 | B Ahlgren P A Aranda P Chemouil | 2011 | IF EF Communications Magazine2011，49，7： | 1 |
| 11 | Requirements for a cocitation similarity measure, with special re~erenee to Pearson's correlation coefficient 显示文摘 | Ahlgren P Jarneving B Rousseau R | 2003 | Journal of the American Society for Information Science and Technology2003，54，6： | 1 |
| 12 | in vivo determination of lead in the skeleton after occupational exposure to lead 显示文摘 | AHLGREN L | 1980 | Brit J of Ind Med1980，37，： | 1 |
| 13 | Excess FoxG1 causes overgrowth of the neural tube显示文摘 | Ahlgren S Vogt P Bronner F M | 2003 | J Neurobiol2003，57，3： | 1 |
| 14 | Decreased heart rate variability may predict the progression of carotid atherosclerosis in type 2 diabetes显示文摘 | Dr. Anders Gotts?ter ?sa Rydén Ahlgren Soumia Taimour G?ran Sundkvist | 2006 | Clinical Autonomic Research2006，，3： | 1 |
| 15 | Effects of buccal shields on the maxillary dentoalveolar structures and the midpalatal Suture-histologic and biometric studies in rabbits显示文摘 | Kalogirous K Ahlgren J Klinge B | 1996 | Am J Orthod1996，109，6： | 1 |
| 16 | Overexpression of cyclin E protein is associated with specific mutation types in p53 gene and poor survival in human breast cancer显示文摘 | Lindahl T Landberg G Ahlgren J | 2004 | Carcinogenesis2004，25，3： | 1 |
| 17 | Selecting a potential swedish fibre crop:fibres and fines in different crops as an indication of their usefulness in pulp and paper production显示文摘 | Helena Wisur Lars-Arne Sjoberg and Per Ahlgren | 1993 | Industrial Crops and Products1993，2，1： | 1 |
| 18 | Phosphorus as growth-regulating factor relative to other environmental-factors in cultured algae 显示文摘 | Ahlgren G | 1988 | Hydrobiologia1988，170，： | 1 |
| 19 | Decreased heart rate variability may predict the progression of carotid atherosclerosis in typc 2 diabetes显示文摘 | Gottsater A Ahlgren AR Taimour S | 2006 | Clin Auton Res2006，16，3： | 1 |
| 20 | Robot contest as a laboratory for experiential engineering education显示文摘 | Verner I M Ahlgren D J | 2004 | Journal on Educational Resources in Computing2004，4，2： | 1 |
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