取样分布

This study is focused on the vertical distribution, production and turnover of the fine roots in a broad-leaved and Korean pine climax forest of the Changbai Mountain Reserve.

采用连续土钻分层取样法，对长白山自然保护区中原始阔叶红松林细根的垂直分布、生长和周转进行了研究。

A result that may be useful for part II is that if X is a continuous random variable taking positive values with cumulative distribution function F and Rn is the range of a sample of size n taken from this distribution, then

一个结果可能对第二部份有用，如果X是连续自由变量并取正值带有累积分配方程F 且Rn是取样数量范围n且Rn来自于这个分布，然后

Therefore, if the soil water properties and soil water-storage was studied with traditional statistic method, we would not know the variate are dependent or independent, whether the results have spatial distributing pattern or not, even not know whether the number of sample is economical and rational or not.

因此用传统方法分析土壤水分特性和水库贮量并不清楚所得的数据是否相互独立，是否存在一定的空间分布格局，更不知道所确定的取样数量是否经济、合理。

In order to study the near-surface permafrost distribution space, field survey and sampling method are used to study the issue.

为了研究近地表面多年冻土的空间分布规律，采用野外调查、取样方法对该问题进行研究。

The results of numerical computation show that pulse transmission line of multi-small-loading capacitance with proportional spacing can be well compensated by the equivalent distributed capacitance method.

图1为快脉冲传输线负载模型，根据传输线理论和分布参数理论，取样门最终可等效为加载到传输线的多个容值很小(0.3 pF)的电容负载。

Moreover, Genet population and Ramet population vary with different altitude and block size.

基株种群和分株种群的分布格局和聚集强度在不同取样尺度和海拔下出现不同的变化。

Horticola , in which Compositae, Cruciferae, Laguminosae and Cucurbitaceae are the main families. It occurs seriously on lettuce, cauliflower, pea, rape and horsebean. The hosts can be divided into four types: the most fitting host, fitting host, preferable host and secondary host. The oviposition of C. horticola on 8 kinds of hosts selected was checked under microscope, which had proved the investigation of host suitability and lettuce is the favorite host.

2004年对扬州地区露地蔬菜上的豌豆彩潜蝇寄主种类及危害程度进行了调查，采用五点取样法共查到豌豆彩潜蝇的蔬菜寄主6科23种，主要分布在菊科、十字花科、豆科和葫芦科等的蔬菜上，其中以莴苣、花椰菜、豌豆、油菜、蚕豆受害最为严重；选择性田间调查和室内试验证明，莴苣是豌豆彩潜蝇最嗜好寄主。

This study was carried out in collective-owned summer grassland in Ganchaitan, which is located at the south foot of eastern Lenglongling Mountain (a branch of north Qilian Mountain), with yak and Tibetan sheep miscellaneously grazed on it. The grassland type could be classified as alpine meadow, dominated by Potentilla froticosa shrub. This study, under grads grazing stress, focused on the community structure, composition, species diversity, above-ground biomass of PFS, by using pane net sampling based on spatial distribution in stead of temporal succession. Results showed that: Grazing stress negatively related to the distance between grazing area and resident area.

以祁连山北支冷龙岭东段南麓的甘柴滩夏季牧场集体长期混合放牧的高寒金露梅Potentilla froticosa灌丛草场为对象，利用空间分布代替时间演替的方法，采用方格网法取样分析调查，对不同放牧压力梯度下金露梅灌丛群落的结构、组成、物种多样性、地上生物量进行研究，结果表明：①放牧居住点由远到近，放牧压力梯度不断增加，金露梅株高、密度、覆盖度、地上生物量和丛间草地的地上生物量均有不同程度的降低，地上的总生物量降低幅度达84.77%。

In order to investigate the tempo-spatial characteristics of negative air ions distribution in Guangzhou from September to November of 2008, we choosed typical plot to make scientific researches, which including the monthly variation of air negative ions, the influences of types of functional zones, sampling timeinterval and typical habitat on air negative charge ion concentration.

为研究广州市下半年空气负离子分布的时空特征，利用空气离子测量仪，在广州市选择典型的采集地，分析了广州下半年空气负离子的月际变化以及功能区类型、取样时段、典型环境对空气负离子浓度的影响。

A tabulating technique of normal distribution sampling and a correlation sampling technique are utilized to simulate bus load uncertainty and correlation.

一个正态分布取样列成表的技术方法和相关抽样技术被利用来模拟母线负荷的不确定性和相关性。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。