Results 21 to 30 of about 36,398 (150)
Community and population research of Tsuga longibracteata [PDF]
, 2016 长苞铁杉（TsugalongibracteataCheng），是属于松科（Pinaceae），铁杉属（Tsuga）的第四冰期孑遗植物；主要分布在我国22°49'-28°33'N，107°12'-118°14'E之间；由于自身更新速度缓慢以及长期的砍伐利用，其地理分布相对狭小且呈零星分布，分布区和居群规模在逐渐缩小和下降，面临着灭绝的危险；本文针对分布在福建省内各县市的长苞铁杉群落进行了基本区系特征、物种多样性、种群生命过程、分布格局和生态位等方面的生态学研究，结论主要如下： 1、各样地长苞铁杉群落在科 ...
夏玉叶
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Public perception of Ghana's Free Senior High School policy: A north–south comparative analysis
Review of Policy Research, Volume 43, Issue 1, January 2026.Abstract Ghana's Free Senior High School (SHS) policy, implemented in 2017, aims to increase access to secondary education, promote equity, enhance educational outcomes, and foster human capital development. This study examines public perception of the Free SHS policy, focusing on the variations between the northern and southern regions of Ghana and ...
Michael K. Dzordzormenyoh +3 more
wiley +1 more source
野生动物学报, 1991 对随机抽取的388号黄羊（Procapra gutturosa）某些指标（牙齿生长替换及磨损度、I牙冠比、体重、前臂长、后足长、尾长、眶间宽、身长、头长）与性别、年龄相关性的分析表明:前面项指标无显著性性别差异,且与年龄显著相关,可以单独作为年龄鉴定指标;后七项指标具显著性性别差异,与年龄关系不密切,只能用于区分成幼或3.5岁以前的年龄鉴别。另外发现高龄个体的牙齿磨损速度有降低的趋势,性成熟年龄雌性有超前雄性一年的趋势。
姜兆文, 徐利, 郑红
doaj
A survey on health-promoting lifestyle among community-dwelling older people with hypertension in Macau [PDF]
, 2017 2007-2008 > Academic research: refereed > Publication in refereed journalVersion of ...
Chen, ZW +8 more
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Australian Teen Voices on Age Verification and Age Assurance Measures
Policy &Internet, Volume 17, Issue 4, December 2025.ABSTRACT Age verification and age assurance technologies, including biometrics, facial recognition software and digital identification, have been explored as potential measures to restrict access of young people to social media and sexually explicit media (SEM), including pornography.
Giselle Woodley +5 more
wiley +1 more source
A Study of Influences of Age Structure Change on the Economic Growth in Southeast Asia Countries [PDF]
, 2016 不同年龄段人口的经济行为具有异质性，少儿人口、劳动年龄人口和老年人口的生产行为、消费行为和储蓄行为等都存在很大差异。人口年龄结构变动必然会通过一系列中介变量来最终影响经济增长。一个国家或地区的人口年龄结构属于幼年型、成年型还是老年型，与这个国家的经济增长密切相关。二战后，暴增的人口给东南亚各国经济和社会发展造成很大阻碍，为了抑制激增的人口速度，从20世纪后半叶开始，东南亚各国相继推行人口政策，人口出生率急剧下降、劳动年龄人口比重逐渐增加、劳动力人口抚养负担不断减轻，陆续迎来了人口结构的“黄金时期”。目前，
范敏
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Ultrasound in Obstetrics &Gynecology, Volume 66, Issue 6, Page 706-715, December 2025.ABSTRACT Objective To evaluate the use of twin vs singleton growth charts for detecting small‐for‐gestational‐age (SGA) twins at risk of adverse neonatal outcomes. Methods MEDLINE, EMBASE, CINAHL, Cochrane and Scopus databases were searched electronically from inception to May 2024.
S. Sorrenti +9 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2011 目的分析健康成人血清ALP活性,探讨ALP水平在成人性别和年龄的分布规律。方法随机选择2008年来吉大一院健康体检各项指标正常的健康人19416例,对其血清ALP活性进行回顾性统计分析。结果 21-50岁男性ALP值显著高于同年龄组女性 ...
吉利, 连丽丽, 孙淑艳, 孙小慧
doaj
Zhongguo shiyan zhenduanxue, 2020 目的探讨育龄妇女和新生儿TORCH的感染情况。方法对2012至2018年在广东医科大学附属医院接受TORCH筛查的育龄妇女和新生儿的资料进行回顾分析,统计检查结果。结果育龄妇女2012至2018年的风疹病毒、巨细胞病毒IgG抗体各年份的阳性率均高于刚地弓形虫、单纯疱疹病毒(P0.05)。育龄妇女低龄组HSVⅠ/Ⅱ-IgM阳性率高于高龄组,差异具有统计学意义 ...
刘丽琴, 黄必堂, 钟琼
doaj
The Norm of the Learning-Disability Checklist for Elementary and Middle School Children (in Chinese) [PDF]
, 2000 The Learning-Disabilities Checklist for Elementary and Middle School Children was administered to 1067 subjects in Shanghai. The data analyses brought us the following: 1) The mean and standard deviation of each variable of raw data; 2) There were ...
Chen, G. P., Shan, Y., Shao, Z. F.
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