population相关论文
本文研究了双色脉冲激光与多电子原子相互作用过程,计算了高激发态的粒子数和总离子数随时间的变化,并对计算的结果进行了分析.......
提出一种用Ar 激光光解Cs2分子，从而得到Cs原子52D，62P态集居的光谱实验方法，并讨论了各种实验参数对原子集居数的影响。......
提出了基于探测高能级上原子布居数实现近简并准Λ型四能级原子系统局域化的方案。利用微扰理论求解薛定谔方程得到了基于上能级原......
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【Abstract】This paper introduces the current problem on provision for the aged. The origin and situations are introduce......
An Empirical Study of the Relationship among Population Mobility Industrial Structure Upgrading, and
Based on the inter-provincial panel data for 31 provinces in China from 2000 to 2019,and incorporating geospatial factor......
Comparative phylogeography of two sister species of snowcock: impacts of species-specific altitude p
Background: Phylogeographical patts and population dynamics are usually interpreted by environmental disturbances and ge......
目的 分析流动人口肺结核患者的临床特征及治疗效果.方法 回顾性分析流动人口中确诊的活动性肺结核68例(观察组)患者的临床资料,并......
目的分析云南省盐碘含量调整前后人群碘营养状况，为适时调整碘缺乏病防治措施提供科学依据。方法采用人口比例概率抽样法，分别在食盐......
Morphological Variations, Distribution and Population Estimation of Indian Spiny Tailed Lizard (Urom
This study was conducted in selected sites of District Bahawalnagar namely, Shaheed Chowk, Chak40/F, Chak 163/7R and Far......
Potential dual expansion of domesticated donkeys revealed by worldwide analysis on mitochondrial seq
Molecular studies on donkey mitochondrial sequences have clearly defined two distinct matal lineages involved in domesti......
Three decades of changes in water environment of a large freshwater Lake and its relationship with s
Tai Lake (Ch:Taihu) has attracted intational attention forcyanobacteria blooms.However,the drivers of cultural eutrophic......
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......
在长白山北坡海拔700m至1300m,海拔每上升100m设置一样地,共计13个海拔梯度,研究主要建群种种群结构及重要值沿海拔梯度的变化.结......
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......
Genetic Diversity of Natural Myrica rubra Sieb.et Zucc Populations in Guangxi Revealed by ISSR Marke
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......
水资源短缺将成为21世纪的重大问题,缺水不仅影响正常的生产与生活,还会影响到人类生存。根据1996-2015年乌鲁木齐县人口、经济和......
In order to comprehend temporal pattern of the larvae population of the yellow rice borer, Tryporyza incertulas, and pro......
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......
Abundance and Fluctuation in Spider Diversity in Citrus Fruits from Located in Vicinity of Faisalaba
Spiders for the present study were collected from different fruit gardens(i.e. citrus) located at various localities(i.e......
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......
目的了解流动人口食源性疾病相关行为。方法采用德尔菲法制定食源性疾病影响因素调查问卷，选择流动人口聚集地作为调查点、以户为单......
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......
Background:Despite the improvement in the health care industry,the rates of undetected,untreated,and uncontrolled hypert......
Experimental Study on the Interspecific Interactions Between the Two Bloom-Forming Algal Species and
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
Characteristics and dynamics analysis of Populus euphratica populations in the middle reaches of Tar
本文通过对荣华二采区10...
Skeletochronological Study of Age, Longevity and Growth in a Population of Rana nigromaculata (Amphi
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
DISTRIBUTION AND POPULATION DYNAMICS OF PARACALANUS PARVUS, PARACALANUS CRASSIROSTRIS, AND ACARTIA B
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
The comparison between allozyme and RAPD makers for the population genetic structure analysis of sca
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
Assessment of Reproductive Potential of Different Populations of Angelica glauca Edgew.,a Critically
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
Comparative growth and viability of hybrids between two populations of Chinese shrimp (Fennropenaeus
Fenneropenaeus chinensis 在 Chinaand 被限制到黄海和 Bohai 海朝鲜半岛的西方海岸。Intra- 并且交叉人口是生产 betweenRushany......
使用4个不同全球模式模拟结果,驱动RegCM4区域气候模式,进行了RCP4.5中等温室气体排放情景下东亚地区21世纪气候变化的高分辨率(25......
Spatio-temporal evolution of population and urbanization in the countries along the Belt and Road 19
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
目的 探讨扬州地区献血者ABO,Rh血型人群分布状况,并对其相关性进行调查研究.方法 选择2010年1月至2011年6月本市中心血站采集的街......
Biogeographic Differences in Cone, Needle and Seed Morphology among Natural Picea asperata Populatio
This study represents a geographical approach to morphological variation of cones, needles and seeds in natural dragon s......
人巨细胞病毒( HCMV)的感染普遍且通常无症状,但却有很多个体是HCMV感染的高危人群.HCMV疫苗的接种能够使感染后发病率降低已在国......
在5个典型自然种群Mylliem(种群1)、Upper Shillong(种群2)、Shillong Peak(种群3)、Laitkor(种群4)和Nongpiyur(种群5)中,详细研......
翅果油树（ElaeagnusmollisDiels）是国家Ⅱ级保护植物，处于濒危状态，由于缺乏不同干扰对种群结构与动态影响的研究，限制了对该种的全面认......
Regional development is a course of accumulation based on many factors, which is directly related to resources utilizati......
Characteristics and dynamics analysis of Populus euphratica populations in the middle reaches of Tar
Populus euphratica Oliv.is widely distributed along the Tarim River.Maintaining stability of P.euphratica population is ......
目的调查健康人群W135群脑膜炎奈瑟菌免疫水平,为制定含W135群流脑疫苗免疫程序提供依据。方法2011年在诸暨市按东西南北中选择5个......
Experimental Study on the Interspecific Interactions Between the Two Bloom-Forming Algal Species and
The interspecific interactions between the rotifer Brachionus plicatilis and two harmful algal blooms (HAB) species were......
贵州喀斯特山区地势崎岖、地质地貌情况复杂，闭塞的环境导致当地人口接受教育的机会少，人口素质偏低，依山靠山的生产生活方式原始粗放......
灰胸薮鹛（Liocichla omeiensis）是我国特有鸟类，因种群数量稀少和分布区狭窄与片段化，被IUCN列为全球性易危物种。目前该鸟仅见于四川......
以种群生命表及生存分析理论为基础,编制了荔波瘤果茶种群静态生命表,并分析了生存率、积累死亡率、死亡密度和危险率等生存函数的......
研究了福建省内几个三尖杉分布区之间三尖杉种子形态变异规律,结果表明,三尖杉种子的形态指标:长、宽、厚、种子大小(长×宽×厚)......
