2005-2009年《图书馆学研究》载文被引统计分析

通过对中文核心期刊《图书馆学研究》载文在2005-2009年间被国内中文期刊引用频次分布、选题分布、被引论文年代分布、引用核心期刊分布、即年指标、影响因子等情况的系统调查、分析,揭示了我国图书情报类学者对该刊载文的借鉴和吸收情况,并为该刊今后的发展研究提供参考数据。     

欢迎订阅2013年《水土保持通报》

《水土保持通报》创刊于1981年,为双月刊,由中国科学院主管,中国科学院水利部水土保持研究所与水利部水土保持监测中心联合主办。《水土保持通报》连续6届被认定为我国中文核心期刊,为《中国科技论文统计源期刊》,《中国科学引文数据库统计源期刊》,《中文核心期刊要目总览》等收编。开本     

欢迎订阅2013年《水土保持通报》

《水土保持通报》创刊于1981年,为双月刊,由中国科学院主管,中国科学院水利部水土保持研究所与水利部水土保持监测中心联合主办。《水土保持通报》连续6届被认定为我国中文核心期刊,为《中国科技论文统计源期刊》,《中国科学引文数据库统计源期刊》,《中文核心期刊要目总览》等收编。开本     

《农业工程学报》在全国中文核心期刊“农业工程类”中位居榜首

据《中文核心期刊要目总揽》2 0 0 0年版统计结果 ,我国现有农业工程类科技期刊 82种 ,其中中文核心刊 1 2种 ,《农业工程学报》在 1 2种农业工程类中文核心期刊中位居榜首。农业工程类排名前三位的期刊依次是 :《农业工程学报》、《农业机械学报》、《农村水利水电技术》。《农业工程学报》在全国中文核心期刊“农业工程类”中位居榜首     

《植物遗传资源学报》2016年征订启事

<正>《植物遗传资源学报》是中国农业科学院作物科学研究所和中国农学会主办的学术期刊,为中国科技核心期刊、中国农业核心期刊、全国中文核心期刊、全国优秀农业期刊,中国科技论文统计源期刊、中国科学引文数据库来源期刊(核心期刊)、中国核心期刊(遴选)数据库收录期刊、中国学术期刊综合评价数据库统计源期刊,又被《中国生物学文摘》和中国生物学文献数据库、中文科技期刊数据库收录。据中信所2014年期刊学术影响因子年报统计,《植物遗传资源学     

《农业工程学报》位列2016年Google Scholar评出的高被引中文期刊第8名

<正>2016年6月Google Scholar评出的h5指数前100名高被引中文期刊中,《农业工程学报》的h5指数位列第8名,为37,h5中位数为44,排名较2015年提前1名。Google Scholar评出的h5指数前10名高被引中文期刊见下表。《农业工程学报》在Google Scholar中的高被引论文及引用次数见封三。     

2017年本学报位列Google Scholar高被引中文刊第5

<正>2017年Google Scholar评出的h5指数前100名高被引中文期刊中,《农业工程学报》的h5指数位列第5名,为38,h5中位数为45。其中Google Scholar评出的h5指数前10名高被引中文期刊见表1,《农业工程学报》在Google Scholar中的高被引论文及引用次数见表2,向相关作者表示祝贺!     

欢迎订阅2012年《生态与农村环境学报》

《生态与农村环境学报》系环境保护部主管、环境保护部南京环境科学研究所主办的学术期刊,是中文核心期刊(GCJC)、中国科学引文数据库(CSCD)核心期刊、中国学术期刊评价研究报告(RCCSE)核心期刊、中国科技论文统计源期刊(中国科技核心期刊),被中国科技论文与引文数据库(CSTPCD)、中文社会科学引     

《草业科学》2015年征订启事

<正>《草业科学》1984年创刊,由中国科学技术协会主管、中国草学会和兰州大学草地农业科技学院主办,是面向国内外公开发行的综合性科技期刊。本刊为"中文核心期刊"、"中国科技核心期刊",并被《中国核心期刊(遴选)数据库》、中国科学期刊文献数据库、英国     

《水土保持研究》投稿须知

《水土保持研究》由中国科学院主管,中国科学院水利部水土保持研究所主办,属地球科学的学术类期刊,创刊于1984年,双月刊,国内外公开发行。先后被编入《中文核心期刊要目总览》,"中国科技论文统计源期刊"(即中国科技核心期刊),《中国     

不同微细水核直径的掺水乳化柴油制备方法和影响因素

随着燃油车和重型农用机械数量的增加,石油资源消耗急剧上升,掺水乳化柴油作为一种新型可替代燃料受到了广泛关注。水核直径对掺水乳化柴油的微爆特性影响较大,但目前缺乏组分不变下的目标水核直径掺水乳化柴油的制备方法和适宜的水核直径表征方法。该研究基于CV模型,开发了适合水核微观结构的图像识别程序;创新性地提出采用对数正态分布函数拟合和表征水核直径的分布。结果表明,相对于索特平均直径,基于对数正态分布函数拟合的表征参数可以更准确地描述掺水乳化柴油内部水核分布情况。随后,基于正交设计方法,通过调节超声波乳化的乳化时间、乳化功率和超声波频率参数实现了组分不变情况下不同水核直径的掺水乳化柴油的制备;并基于新的表征参数,研究了制备参数对掺水乳化柴油中水核直径的影响规律以及敏感性等特征。研究表明:超声波频率、乳化功率和乳化时间3个制备因素对最大直径的极差为0.744、2.880、1.038,对分布标准差的极差分别为0.028、0.120、0.034,因此各因素的影响优先级分别为:乳化功率、乳化时间、超声波频率。随着乳化功率、乳化时间的增加,乳化效果明显增强,掺水乳化柴油中水核直径的拟合最大值与分布标准差逐渐减小,使得掺水乳化柴油中水核直径既小又平均,而超声波频率的影响则不明显;此外当水核直径及分布标准差减少到一定值后,增加乳化功率比增长乳化时间对掺水乳化柴油水核的细化影响更大,该研究可为乳化柴油制备水供参考。     

提高我国农业工程类科技论文Ei和SCI收录率的探索

科技论文能否被Ei和SCI检索系统收录或引用,已成为科技工作者追求的目标和关注的热点。该文在分析Ei和SCI收录国内外农业工程类科技论文状况的基础上,建议从向国际知名农业工程类期刊投稿、重视论文引用的参考文献、遵循Ei和SCI对英文摘要与论文的国际化的著录要求、积极参加国内外国际会议、改革期刊管理体制和提高国内期刊的国际化水平等几个方面采取措施,以增加Ei和SCI收录我国农业工程类的科技论文的数量。     

The effect of change in soil volume on organic matter distribution in a volcanic ash soil

Volcanic ash soil contains large stocks of organic matter per unit area. A large proportion of organic matter is stored in the subsoil; therefore, a thorough understanding of its vertical distribution is needed to predict the effects of change in climate and land use. Faunal bioturbation is often cited as the dominant process that affects the vertical distribution of organic matter. An additional but often overlooked process is change in the volume of the soil. Such change might affect the vertical distribution of organic matter by changing the position of the soil surface, which can affect the soil‐forming processes related to depth, such as weathering, decomposition, bioturbation and rooting. We calculated the change in volume with geochemical mass balance equations, and showed the effect of change in soil volume on the vertical distribution of organic matter using a dynamic model. Then we evaluated the plausibility of the model concept with an independent model for parameter identification and through a model sensitivity analysis. Results show that volume change is a major soil‐forming process that determines the vertical distribution of organic matter in volcanic ash soil as the active bioturbation zone moves upwards in response to soil thickening.     

Thematic Evolutionary Analysis of Core Agricultural and Natural Resource Academic Journals in Iran

ABSTRACT

For a core journal to be developed, fruitful research articles, diversity, and continuity of research topics are essential. The main goal of this study was to trace the thematic evolution (historical development) of agricultural and natural resource academic journals (ANAJs) published by public academic institutions in Iran. To this end, the study analyzed 2,961 articles published from 1905–2003 in all publicly-funded ANAJs in all contributing agricultural and natural resource academic majors (subfields), examining the scientific domain, research subject, research method, citations, impacts, and the aggregation level of journals on academic majors and academic majors on journals. Less than 5% of the articles were qualitative and cited theoretical frameworks. Over 95% were quantitative articles as their publications progressed. Thematically, agronomy and plant breeding, with 31.68%, had the highest aggregation level among academic majors; whereas, agricultural extension and education, with 2.08%, had the lowest.     

含沙量对U型渠道水流流速横向分布律的影响

探索含沙量变化对U型渠道水流流速沿横向分布的影响,进而从理论上完善挟沙水流流速分布规律,对渠道水沙运动规律的研究有重要意义。引入指数流速分布公式,通过U型渠道水槽试验,测定水流中含沙量为1.12～500kg/m3时,指数公式中流速横向分布系数的变化规律,说明U型渠道挟沙水流流速沿横向分布遵循指数流速分布规律。在含沙量s<300kg/m3下,流速横向分布系数随着含沙量的增大呈线性缓慢增大,当含沙量s≥300kg/m3时,流速横向分布系数由缓慢增大变为急剧增大,说明水流流型已发生了变化;含沙量s≥50kg/m3时,U型渠道的中心出现了核心区,核心区随着含沙量的增大而变宽。     

五所高校图书馆学术论文的定量分析

采用文献计量学方法,对五所高校图书馆科研人员6年中在《全文数据库》中收录的学术论文的年代、数量、质量（核心期刊载文量）、论文在核心期刊的分布、核心期刊著者分布等进行统计分析,找出5所高校图书馆研究人员学术论文的规律和特点,为今后高校图书馆的发展规划及科研政策的制定提供依据。     

University of Arkansas Food Science Faculty Publications and the Characteristics of Their Cited References: A Bibliometric Study

ABSTRACT

In the allocation of collection resources, it is important to have a good understanding of the teaching, instruction and research needs of faculty and graduate students. Data related to the use of electronic databases, journals, books, etc. is helpful; however, this data does not reflect the nature and impact of the information retrieved, but merely provides a general idea of the number of times items have been searched, retrieved or borrowed. By identifying and analyzing faculty and graduate students' publications and grant proposals to determine where researchers are publishing and what sources they are citing in their research, the Library can assess how well it is supplying a core of literature to meet research needs. To this end, this study analyzes the publication and citation patterns of food science faculty at the University of Arkansas for a fourteen-year period, 1990–2003. The findings show that faculty are using and citing materials ranging from 1 to 22 years old and that 85 titles account for only 13.67% of the total journals cited but for 77.75% of the citations. It is assumed that these 85 titles constitute the core journal titles for food science research.     

Foraging site fidelity shapes the spatial organisation of a population of female western barbastelle bats

Information about the spatial distribution of individual foraging habitats, which determines the space required by a population to be viable, is vitally important for the conservation of bats. Detailed knowledge of this kind is crucial for the design of nature reserves and management plans. Recent field studies that examined habitat use and home range distribution of bats largely ignored factors like traditional range use vs. intra- and interspecific competition, which may be responsible for the spatial organisation of a population home range. We investigated the home range sizes and distribution of a maternity colony of the western barbastelle bat via radio telemetry in four consecutive tracking sessions (2004-2007). Based on 19 data sets with a total of 2737 fixes obtained from 12 females, we examined (i) how colony members partition the population home range (home range overlap analysis), and (ii) if individuals tracked over several years exhibit site fidelity. Home range sizes ranged from 125 to 2551 ha (median: 403 ha), with a median number of 2 core areas (range: 1-5 core areas per individual per year). The core area sizes ranged from 5 to 285 ha (median: 67 ha). A home range and core area overlap analysis showed that site fidelity across years seems to be more important for home range distribution than competition among colony members. This allows researchers to combine information from several years to get a deeper insight into the population’s spatial requirements.     

The influence of bioturbation on the vertical distribution of soil organic matter in volcanic ash soils: a case study in northern Ecuador

Soil faunal bioturbation (‘bioturbation’) is often cited as a major process influencing the vertical distribution of soil organic matter (SOM). The influence of bioturbation on vertical SOM transport is complex because it is the result of interaction between different groups of soil faunal species that redistribute SOM through the soil profile in distinct ways. We performed a semi‐quantitative micromorphological analysis of soil faunal pedofeatures and related their occurrence to the vertical distribution of SOM and high‐resolution radiocarbon dating in volcanic ash soils under montane forest and grassland (páramo) vegetation in the northern Ecuadorian Andes. The páramo soil data suggest that bioturbation was largely responsible for the vertical distribution of SOM, while illuviation and root input were of minor importance. Bioturbation was caused by endogeic species, which typically mix the soil only over short vertical distances. Short vertical distance mixing was apparently enhanced by the upward shifting of bioturbation as a result of soil thickening due to SOM accumulation. A change from páramo to forest vegetation was accompanied by a change from endogeic to epigeic species. As these latter species do not redistribute material vertically, this eventually resulted in the formation of thick ectorganic horizons in the forest.