查询词典 variation of a function

It unifies the variation of parameters and structure of system that leads to the variation of its time scale.

时间尺度的概念将对象参数和结构的变化导致系统快慢特性的变化统一在一起，所以控制器参数整定的时间尺度变换公式也给出了控制器对对象不确定的适应性和控制器对其自身参数变化的鲁棒性的新的涵义。

The variation of litter quality parameters were not corresponding to the variation of decomposition rates one by one.

可见在跨气候带的凋落叶分解过程中，气候因子的控制作用较强于凋落叶初始基质质量的控制作用。

Furthermore, the filter circuit of a low-impedance is carried in the power source of a voltage amplification part by the right-and-left independency, and the interference by the supply voltage variation by the load current at the time of the Oide power or a power supply variation on either side is reduced sharply.

此外，该滤波电路的低阻抗是在电源电压放大部分的权利和左独立性，并干扰电源电压变化的负载电流时的功率或Oide电源变化对任何一方是大幅度降低。

The drama of linguistic variation,"according to Wyld (1927: 21; Milroy, 1992: 5),"is enacted not in manuscripts, but in the mouths and minds of men; second, a cognitive study of linguistic variation is a topic which linguists start to talk about very recently.

说白了，它是人类大脑的产物。Wyld(1927：21；Milroy，1992：5)认为：'语言变异这出戏的剧本，完好地保存在人们的嘴巴里和人们的脑子里，而不是以脚本的形式存在。

The results indicate that soil salinity was generally high and showed the trend of alkalization to some extent,the variation in salinity and moisture was moderate while the variation in pH was rather weak.

结果表明：土壤盐分较高且呈一定的碱化趋势；盐分与含水量为中等变异强度，pH为弱变异强度。

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。

He has to relate with three women in the movie, and yet remain implicitly faithful to the unseen Lucinda.

让克劳德布里亚里成功地饰演试验了一个难度很大的角色：和三个女人打交道，但还要底下对观众未曾谋面的卢馨达保持忠诚。

The experiment was conducted to study effects of inulin on the growth performance, indices of immune organs and serum immunoglobulin of laying chicklings as well as the performance of inulin which replaced the antibiotics in diets by adding 0.2%, 0.4% and 0.8% of inulin, respectively.

试验旨在通过在蛋用雏鸡日粮中添加0.2%、0.4%和0.8%的菊粉，研究菊粉对蛋雏鸡生长性能、免疫器官指数和血清免疫球蛋白的影响，以及菊粉替代抗生素对蛋雏鸡的应用效果。