trees相关论文
The chemical composition of Acacia nilotica,Dichrostachy cinerea and Ziziphus mucronata harvested from three agro-ecolog......
There have been many emergent vegetation studies using cylindrical or squared rods for simulating real trees in open cha......
Sentinel Plantings in Other Continents, a Novel Method to Identify Potential Insect Invaders - Final
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A Study of Personality and Destiny of the Monster in Frankenstein from the Perspective of Psychoanal
In Frankenstein， Mary Shelley describes the experiences and experiences in the life of the monster. During the period of ......
Once a beautiful Chippewa maiden died on the day she was to have married a brave， young warrior. He was very brave， but th......
Forestry has played an important role in hazard mitigation associated with debris flows.Most forest mitigation measures ......
Influence of individual tree characteristics,spatial structure and logging history on tree-related m
Background:Tree-related microhabitats(hereafter,\"TreMs\")are key components of forest biodiversity but they are sti......
This paper describes an approach to ethical decision design. It discusses the use of several mathematical tools applicab......
What have we learned about mycorrhizas in interplant nitrogen transfer in oak woodlands- Old ideas v
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目的了解成都市植物园白蚁的种类组成、优势种和危害情况,为白蚁防治管理和决策提供科学依据。方法采用抽样调查和重点调查相结合......
Yesterday was Tree Planting Day. My classmates and I planted many young trees on the hill near our school. Trees are ......
目前国内地市以上报纸,几乎都已经有了各自的网站。省级和中心城市大多也以上海东方网的模式,整合同级党委所属媒体,推出综合性的......
An L(3,2,1)-labeling of a graph G is a function f from the vertex set V(G) to the set of all non-negative integers (labe......
本文通过对荣华二采区10...
In this study, we investigated the specific gravity of wood samples collected from a total of 31 woody species, consisti......
Snow gliding and loading under two different forest stands:a case study in the north-western Italian
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......
This review on current biotechnological methods in forestry for in vitro tissue cultures to define the effect of stress ......
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......
风速是森林生态系统研究中最为重要的变量之一,同时也是控制气流运输过程最基本的要素.由于树木生理指标和生长过程对风速的改变十......
Plant species distributions show patterns along elevation gradients. Regardless of the diverse Afromontane vegetation in......
Effect of nitrogen levels on photosynthetic parameters, morphological and chemical characters of sap
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......
Abstract [Ob.iective] The aim was to explore climatic characteristics of cold and frost disaster and the effects on flow......
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......
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......
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......
In a sensor network with a large number of densely populated sensor nodes, a single target of interest may be detected b......
As Central Asia is a region with wide spread water scarcity as a result of excessive irrigation of agriculture, land use......
Parkland Trees under Severe Drought: An Assessment of Species Diversity and Abundance across Three A
The appraisal of tree stand structure on parklands is crucial for sustainable agroforestry management decisions, particu......
Abstract [Ob.iective] The aim was to explore climatic characteristics of cold and frost disaster and the effects on flow......
A subset S of V is called a k-connected dominating set if S is a dominating set and the induced subgraph has at most k ......
The past few decades have seen a resurgence of interest in biological allometry. Specifically, a number of recent studie......
Vegetation fractional coverage (VFC) is one of the key indicators of vegetation distribution. In the work a measurementb......
为科学确定林下蘘荷宜植林区密度,以香橼林下蘘荷为研究对象,对不同林木密度下蘘荷植株及经济性状进行定点系统测查,结果表明:在覆......
林冠层作为森林生态系统的组成部分之一,截获光能、降雨,决定林分郁闭程度,从而影响林分生产力及空间利用程度,是树木重要的生理生......
断裂度是图的哈密尔顿性和容错性的一个有效度量。给出了树和它的余树的断裂度的和与积的取值范围。......
This review on current biotechnological methods in forestry for in vitro tissue cultures to define the effect of stress ......
为了检测山西中部园林绿化树种播种苗的越冬特性,进而为苗木培育提供实用参考依据,对19种山西中部地区常见的园林绿化树种的1年生......
目前已有的关于树在风中运动的模拟方法存在两个缺点:计算量太大,难以实时模拟;成像粗糙,真实感不强。基于此,提出了一种新的模拟......
生成图形相似性太强和不易局部控制是目前主流植物建模方法存在的共同不足之处,基于指定树木的分枝类型和空间的随机分布点,提出了......
重金属污染是威胁生态安全和人类生存的重要环境问题之一。林木对土壤和水体中的重金属离子具有较强的吸收和富集作用,但由于林木......
为进一步研究分予的性质，M．Randic在文[2]中首先介绍了Wiener-Hosoya指标．Wiener-Hosoya指标能够用h（T）=∑↑e∈E（T）（h（e）＋h[e]）组合原理来表示......
摘要 分别从虫害对林木生理生化特性及光合特性的影响方面对近年来的研究进展进行了综述，并对今后的林木虫害研究进行了展望。 ......
主要讨论了n阶连通图的度距离的一些性质,得到了n≥8时完美匹配树的最小度距离图,并给出完美匹配树的最小度距离序.......
研究了树的邻接矩阵，总结邻接矩阵的性质：树的邻接矩阵可以存储表示树，由树的邻接矩阵容易判定各个结点的度和该结点是否为叶子，可以并......
城市园林公墓的生态建设是我国生态环境整治的重要环节，其核心是造林绿化和水土保持。松柏类乔木是目前我国公墓绿化主要树种，但对它......
