相关关系

Objective To study the relationship between gestational age and fetal limb long bone, foot length with ultrasound.

目的 探讨超声测量胎儿四肢长骨及足长与孕龄相关关系。

The accessibility model of regional railway network is composed of two parts, the city accessibility grade model and the line accessibility grade model, which respectively reflect the relationship between the regional railway network construction and urban development and the roles of lines playing in the network.

其中包括了城市可达性等级模型和线路可达性等级模型，分别用于反映区域铁路建设与城市发展的相关关系和线路在区域铁路网中的等级地位。

By using the 8 km NASA/GIMMS half-monthly composite NDVI data and climate data in 1982-2003, this paper studied the dynamic changes of the annual mean value and accumulation anomaly of NDVI on the north foot of Yinshan Mountain, as well as the time series relationships of annual mean NDVI with annual mean temperature and annual precipitation.

利用1982-2003年8kmNASA／GIMMS半月合成的植被指数数据和同期气候数据，分析了阴山北麓地区农牧交错带的NDVI年平均值、年累积值距平的动态变化以及NDVI年平均值与年平均温度和年降水的时间序列相关关系。

A mathematical model was introduced to describe the correlation between the decoloring efficiency and such factors as influent color, retention time a.nd biomass of water hyacinths.

还进行了小型动态实验，并建立了一个反映脱色率与进水色度、色水停留时间和凤眼莲生物量等参数间相关关系的数学模型。

The source of Fe was provided strong supporting evidence. Iron isotopic ration of BIF has the positive dependence ofδEu, indicating the source of Fe correlation with hydrothermal fluid.9. A model for Fe cycling.

首次从成矿元素本身为BIF的物质来源提供直接证据：BIF的Fe同位素成分与Eu异常存在非常明显地正相关关系，这清楚地表明鞍本地区BIF中铁的来源与海底火山热液活动有关。9。

Larches of different ages have different net photosynthetic rate: the photosynthetic capacity of the young ones are bigger than that of the old ones; the stand density do not affect the net photosynthetic rate obviously; as far as the different stand classes are concerned, the diurnal changes of net photosynthetic rate is closely related to the photosynthetic active radiation. For the different layers of the crowns, there are greater ecological factors (illumination intensity, temperature, humidity etc.) on the upper layers than on the lower layers: the CO2 concentration of the lower layers is greater than that of the upper layers, which is indeed an exception; the net photosynthetic rate on the upper layers of the crown is generally greater than that of the lower layers. It showed that the CO2 concentration is not a main factor in the natural changing range of the CO2 concentration. Different directions of the crown have different photosynthetic active radiation, which is generally like exposed to the sun﹥North﹥in the shade of crown. However, the changes of net photosynthetic rate are not quite the same, which is North﹥exposed to the sun﹥in the shade of crown.

不同年龄的兴安落叶松净光合速率不同，年龄小的个体光合能力高于年龄大的个体；群团密度与净光合速率没有显著的相关关系；而对不同分级木，净光合速率日进程变化规律与光合有效辐射有着密切的联系；林内树冠不同层次各生态因子有上层大于下层的趋势，而CO2浓度在下层的含量高于上层，净光合速率上层普遍大于下层，说明在林内自然CO2浓度变幅内，CO2浓度不是主要因子；兴安落叶松树冠不同方向的光合有效辐射不同，一般向阳﹥北向﹥背阴，而净光合速率变化有北向﹥向阳﹥背阴的趋势。

There is significant linear correlation between the content of water-stable aggregates and the fractal dimension of soil aggregates.

团聚体含量与团粒结构粒径分布的分形维数D值存在显著的线形相关关系。

The result is as follows:(1) The frequencies of the straight thumb were over 60%,and there were no significant sexual differences in all of 6 groups.(2) The frequencies of the ring-finger-longer were much higher in 6 groups,and there were significant sexual differences in 4 groups.(3) The frequencies of the long-shaped fingernail were the highest in all groups,the squat-shaped were the lowest.(4) The big toes were longer than the second toes in most people of 6 groups,but without significant sexual differences in each groups.(5) There were no significant correlations between 4 characters.

研究表明：（1）6个群体的直型拇指出现率均在60％以上，且均无性别间明显差异；（2）6个群体环指长率均远高于食指长率，有4个群体存在性别间显著差异；（3）各群体均表现出长型指甲最多、方型次之、扁型最少；（4）6个群体均多为拇趾长型，且各群体均无性别间显著差异；（5）4项指标之间无明显相关关系。

We collected leaves of C3 plant-R, eymosa Tratt from lower altitude of Molan, 450 m above sea level, to higher altitude of Ansun, 1330 rn above sea level, in limestone areas of southwest China at November 2001, and analyzed nutrient concentrations and carbon isotope compositions.

为了研究植物营养元素的含量和δ~(13)C值随海拔而变化的相关关系，沿着海拔450 m的贵州茂兰至海拔1330 m的贵州安顺一线，采集和分析研究了C_3植物——小果蔷薇(R.cymosa Tratt)的叶片。

The analytic grammar for reference talking and input attributes were described in this paper, as well as the ARME algorithm for agent and reference talkings. One case for the ARME system was applied in ball movement with adaptive agents.

另外，文中还利用适应性学习主体的ARME系统应用于体育足球运动的简化形式，建立了一个具有过程特性的适应性神经网络的原型系统，此模拟系统表明了适应性连接主义网络与环境和竞争的运动主体相互之间所具有的适应性相关关系。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。