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团体名称规范是规范工作的重要组成部分,文章从团体名称规范界定范围、标目结构、标目选取原则、各种标目形式和著录方式进行了论述。 相似文献
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中国人的姓氏具有姓氏数量相对于总人口的比例严重短缺、各汉字姓氏在人口中的实际分布严重失衡、取名用字高度集中等特点。在中文编目规范控制过程中对中国个人名称标目进行区分尤为重要。中国个人名称标目的区分问题包括对古代个人名称和现代个人名称标目形式的问题;标目附加成分选取标准的控制原则、附加成分类型的划分和属性的分析等。将文献计量学的概念引入规范控制研究领域,会进一步丰富编目规则修订工作的信息来源,有助于拓展规范控制的研究领域。参考文献12。 相似文献
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在知识经济爆炸的今天,各类信息铺天盖地,各种传播方式也应运而生。其中,报纸的传播方式主要是通过文字。但高节奏化的生活又使人们没有那么多的时间看报纸。因此,报纸中的标题制作至关重要。 相似文献
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文章构建了具有自主知识产权的煤矿采掘面产尘模拟分析实践教学系统。该系统可使学生全面、直观地感受煤矿采掘面截割/钻进破煤产尘过程,并指导学生开展“截割/钻进参数调控-产尘特征监测-数据统计分析”的全过程自由探索型创新实验,量化分析截割/钻进参数对产尘特征(浓度、分散度等)的影响。对于提高学生的思考和实践能力,培养学生的创新思维,深化学生对采煤、掘进过程中粉尘灾害和产尘机理的理解,激发学生的科研兴趣,以及有针对性地提出截割/钻进减尘、优化粉尘工程控制措施和个体防尘技术具有重要意义。 相似文献
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对冷镦钢连铸坯的质量缺陷进行了分析和描述,对产生缺陷的原因及影响因素进行了深入的分析和思考,并通过采取优化冷却、调整结晶器液面控制方式、保护渣设计、加强关键设备的管理及规范操作等工作的开展,实现了铸坯质量的有效改善,提升了冷镦钢产品在市场上的竞争力。 相似文献
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Eric R. Muoz Jaclyn B. Caccese Brittany E. Wilson Kyle T. Shuler Fernando V. Santos Carolina T. Cabn John J. Jeka Dianne Langford Matthew B. Hudson 《运动与健康科学(英文)》2021,10(2):122
BackgroundConsidering the potential cumulative effects of repetitive head impact (HI) exposure, we need sensitive biomarkers to track short- and long-term effects. Circulating small extracellular vesicles (sEVs) (<200 nm) traffic biological molecules throughout the body and may have diagnostic value as biomarkers for disease. The purpose of this study was to identify the microRNA (miRNA) profile in circulating sEVs derived from human plasma following repetitive HI exposure.MethodsHealthy adult (aged 18–35 years) soccer players were randomly assigned to one of 3 groups: the HI group performed 10 standing headers, the leg impact group performed 10 soccer ball trapping maneuvers over 10 min, and the control group did not participate in any soccer drills. Plasma was collected before testing and 24 h afterward, and sEVs were isolated and characterized via nanoparticle tracking analysis. Next-generation sequencing was utilized to identify candidate miRNAs isolated from sEVs, and candidate microRNAs were analyzed via quantitative polymerase chain reaction. In silico target prediction was performed using TargetScan (Version 7.0; targetscan.org) and miRWalk (http://mirwalk.umm.uni-heidelberg.de/) programs, and target validation was performed using luciferase reporter vectors with a miR-7844-5p mimic in human embryonic kidney (HEK) 293T/17 cells.ResultsPlasma sEV concentration and size were not affected across time and group following repetitive HI exposure. After 24 h, the HI read count from next-generation sequencing showed a 4-fold or greater increase in miR-92b-5p, miR-423-5p, and miR-24-3p and a 3-fold or greater decrease in miR-7844-5p, miR-144-5p, miR-221-5p, and miR-22-3p. Analysis of quantitative polymerase chain reaction revealed that leg impact did not alter the candidate miRNA levels. To our knowledge, miR-7844-5p is a previously unknown miRNA. We identified 8 miR-7844-5p mRNA targets: protein phosphatase 1 regulatory inhibitor subunit 1B (PPP1R1B), LIM and senescent cell antigen-like domains 1 (LIMS1), autophagy-related 12 (ATG12), microtubule-associated protein 1 light chain 3 beta (MAP1LC3B), integrin subunit alpha-1 (ITGA1), mitogen-activated protein kinase 1 (MAPK1), glycogen synthase kinase 3β (GSK3β), and mitogen-activated protein kinase 8 (MAPK8).ConclusionCollectively, these data indicate repetitive HI exposure alters plasma sEV miRNA content, but not sEV size or number. Furthermore, for the first time we demonstrate that previously unknown miR-7844-5p targets mRNAs known to be involved in mitochondrial apoptosis, autophagy regulation, mood disorders, and neurodegenerative disease. 相似文献
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为论证科技期刊按需编制印刷版年终主题词索引的合理性,本文设计问卷,调查《中华烧伤杂志》读者年龄、职称等一般信息.将调查对象按照上述内容进行分类,调查其是否知晓本刊年终主题词索引、查询本刊文章及检索医学文献的常用路径,对数据行Pearson卡方检验及Bonferroni校正.结果是:327名调查对象中,与41~50岁及51~60岁调查对象比较,21~30岁调查对象对本刊印刷版年终主题词索引的知晓比例明显下降(P值均小于0.05);与高级职称调查对象比较,无职称(研究生)、初级职称、中级职称调查对象对本刊印刷版年终主题词索引的知晓比例明显下降(P值均小于0.05).各年龄段及各种职称等级调查对象中,不足38%通过纸版期刊查询本刊文章.可见年轻读者对印刷版年终主题词索引的知晓度降低,应用率也较低,大部分读者倾向于通过网络查询期刊文章.提示科技期刊印刷版年终主题词索引的编制已失去原有的作用和意义,按需省略是合理的. 相似文献
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农业产业化龙头企业与农户利益关系研究 总被引:10,自引:0,他引:10
龙头企业带动型农业产业化经营模式是目前中国农业产业化经营的基本组织形式之一。通过对现阶段各种典型龙头企业带动型农业产业化经营模式的分析比较,认为就龙头企业与农户的利益关系而言,在总体目标基本一致的前提条件下也会出现个体的差异。无论对龙头企业的利益维护还是农户的利益保护,其程度沿松散型、半紧密型和紧密型的路径逐渐提升。 相似文献
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