查询词典 variation

On the basis of the detection of Radarsat data variation, the urban area variation was divided into two types, namely smooth transition and abrupt change, which were assigned respectively to homoplasmic area and alloplasmic area.

以成都市区Radarsat图像为数据源，基于雷达图像服从的分布，对城区变化存在的平滑转变和阶跃转变2种类型，运用指定的数学算子和最大似然规律进行图像变化检测。

The following results are made from this research: Assessing data quality and band combination of different bands in line with geo-target features in desertification areas, and determining basic bands for desertification monitoring. And understanding and studying the spectral features and variation rules of geo-targets in the experimental area, raising that it is the basis of geo-targets information collection with imaging spectrometer data to understand spectral features and variation rules of geo-targets, realizing that in a great extent spectral-integrated-form-based classification method can remove the phenomenon of "different spectrum with same objects" resulted from reflection ratio curve translation because of the angle change among sensor, targets and observation direction, and the average and variance images can be introduced to solve the problem of two kinds of geo-target with similar spectral forms and much different values of whole reflectionratio. It is suggested that "red edge" range bands of vegetation, which has close relationship with vegetation cover and biomass, is the main characteristic bands and important basis for careful vegetation classification and quantitative retrieval, and pixel-based derivative spectral analysis is very useful for removing the effects of soil background values and quantitatively retrieving vegetation biomass and cover. The remote sense quantitative retrieval model is developed for main appraisable factors of desertification monitoring assessment with imaging spectrometer data and then the applicability of model is analyzed.

研究结果如下：首先针对荒漠化地区的地物特征，对高光谱数据不同波段的数据质量、波段组合进行了评价，提出了适用于荒漠化监测的基本波段选择集；初步了解和掌握了研究地区的地物光谱特性及变异规律，进一步明确了掌握地物光谱特征和变异规律是用成像光谱仪数据提取地物信息的基础；发现了基于光谱整体形状的分类方法在很大程度上能够消除由于传感器、地物目标观测方向之间的角度变化引起的反射率曲线整体平移的&同物异谱&现象，对于谱形相似而整体反射率的值相差较大的两类地物，通过引入均值和方差图像参与分类得到解决；研究还表明在植被&红边&范围内的波段是进行荒漠化监测的主要特征波段，这些波段与植被生物量和盖度都有密切的关系，是开展精细植被分类研究和植被定量反演的重要基础；像元的导数光谱分析可以消除土壤背景的影响，是进行植被生物量和盖度定量反演的有力工具；建立了荒漠化监测主要评价因子的定量反演模型，并分析了模型的适用性。

Based on field experiment and measure data, ecological characteristics of soil water in different fencing sandy land in arid desert area and vegetation restoration effect of soil water variation in fencing sandy land were analyzed. In representation of Artemisa arenaria DC population, observing and researching vegetable restoration effect of soil water variation in fencing sandy land. The results indicate as follow:(1)With the vegetation development constantly in fencing sandy land, soil water utilization of vegetation increased. It made soil water content and soil water storage reduced with the increase of fencing time in sandy land.

本文通过野外实验测定数据，分析研究了干旱荒漠区不同类型封育沙地土壤水分生态特征，以及封育沙地土壤水分变化对植被恢复的影响，并以当地沙蒿种群为代表，观测研究封育沙地土壤水分变化对植被恢复的影响，结果表明：(1)封育沙地随着植被的不断生长，植被对土壤水分的利用也有所增加，从而使沙地土壤含水量和储水量随封育时间的加长而表现为一定的降低趋势。

The studies on intraspecific variation of Batrachospermum gelatinosum and B.intortum have been made. The results show that the intraspecific variation is widespread. Most of numerical characters are in great variable range. Compared with the reproductive organs, the vegetative organs are more variable to vary.

对胶串珠藻和绞扭串珠藻的种内形态变异进行了初步研究，结果表明，种内形态变异现象普遍存在，变异范围较大的，多属数量性状，且营养结构较生殖结构特征具有更大的变异性。

Genetic variation was evaluated using phenotypic traits and RAPD markers in 8 natural populations of Betula luminifera from Fujian Province, China. The relationship between genetic variation and environmental factors was also examined.

采用表型性状测定结合RAPD标记，研究福建境内8个光皮桦野生种群的遗传变异，探讨遗传变异与环境因子间的相关性。

With the aid of this technique,the precision of fault location could be greatly immune to the external interference,which comes from the variation of line parameters,especially for the variation caused by tough climate or severe chilliness in some areas where the line passes by.

针对由于输电线路参数随外界条件变化而带来的双端测距误差，本文利用现有的双端测距所提供的硬件设备，提出了基于两端数据同步的线路参数在线估计技术和算法。

The titer variation to juvenile hormone of female worms was detected by GC-MS system, from which there was an obvious correlation between variation regularity to juvenile hormone and vitellogensis's regularity in Chrysopa septempunctata.

通过GC-MS系统测定了大草蛉雌虫体内保幼激素Ⅲ滴度的变化，从中可以看出大草蛉体内保幼激素滴度的变化与卵黄蛋白发生存在明显的相关性。

The titer variation to juvenile hormone of female worms was detected by GC-MS system, from which there was an obvious correlation between variation regularity to juvenile hormone and vitellogensiss regularity in Chrysopa septempunctata.

通过GC-MS系统测定了大草蛉雌虫体内保幼激素Ⅲ滴度的变化，从中可以看出大草蛉体内保幼激素滴度的变化与卵黄蛋白发生存在明显的相关性。

The results indicated that there existed significant differences in growth rate and wood quality among the provenances. A classical clinal variation pattern responding to the latitude of seed sources was found for DBH, height, individual volume and stem straightness, and water and heat resources of seed sources were the main climatic factors which caused the variation.

结果表明：马尾松生长、形质和木材基本密度皆存在显著的种源差异，种源胸径、树高和材积生长及树干通直度呈典型的纬向倾群变异模式，这种变异主要是由其产地水热资源条件差异引起的。

The various parameters observed were the following : modification of the skin status, coat, eyes, mucous membrane, apparition of secretions or excretions and neurovegetative reaction (tears, piloerection, variation of the pupillary diameter, variation of the respiratory rhythm…), walking modifications, changes in the posture, reaction to manipulation, presence of clonic or tonic movements, stereotyped or unusual behaviors, sensorial reactivity to various stimuli (auditory, visual, proprioceptive), prehension strength and moving activity.

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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。