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The main factors affecting the accuracy of Permanganate index determination are water bath calefaction time, titration time and blank value.

影响高锰酸盐指数测定准确性的主要因素是水浴加热时间、滴定时间和空白值,本文通过实验考察这三个因素对高锰酸盐指数测定的影响程度,对高锰酸盐指数的准确测定具有指导意义。

Landscape pattern analysis based on landscape metrics is a basic content of the research on landscape ecology. More and more researches proved that not only scale effects and the precision of remote sensed data had significant influence on landscape metrics, but also the difference of land use classification would make the change of landscape metrics. However, we still have not found out how land use classification affects landscape metrics and associated influence mechanism.

基于景观格局指数的空间格局分析是当前景观生态学研究的重要基础内容,不仅数据源准确度、尺度效应显著影响景观格局指数,土地利用类型划分也对景观格局指数具有显著影响,但我们对这种影响的总体理解尚很缺乏。

This work gives an algorithm to simplify the rational curves in this situation. After the approximate proper index is defined, it is computed by solving the semi-algebra system. The greatest common divisor is obtained according to the computing process of approximate proper index.

为此,讨论了这类有误差的有理参数曲线,定义了近似非恰当参数形式和近似非恰当指数,并通过半代数系统计算近似非恰当指数;在给出近似非恰当指数的同时,得到近似最大公因子。

According to the shape parameter Sc=0.731 for the XRD peak of illite from Alpine flysch and using these equations the boundaries of anchizone of Weaver and Weber indices were calculated as 5.8-17.6 and 300-179, respectively.

根据阿尔卑斯复理石伊利石形态特征Sc=0.731,由这些关系式进行近变质带上下界线的转换得出与Kübler指数0.42~25°△2θ界线对应的 Weaver指数和Weber指数的界线值分别为5.8~17.6和

After reviewing their recommended 7 indexes, we demonstrated the inappropriateness of their single index or 2-index combinational rules.

指出了他们基於这7个指数的单指数凖则和2-指数凖则的不足之处。

Methods: Sixty-four patients with gingivitis were randomly divided into two groups: the experimental group and the control group; changes of clinical symptoms, PLI, GI and SBI before and after treatment were observed.

将64名牙龈炎的患者,随机分成实验组和对照组,每组32人,观察用药前后两组临床症状和菌斑指数、牙龈指数、龈沟出血指数的变化。

Using the DG index to measure the diversity of soil invertebrate assemblages was more reasonable than Shannon-Wiener Diversity Index in this case because the Acarina predominated in the samples which covered up the information of other soil invertebrate taxa, while the DG index is proposed on base of the hypothesis that every species has equal independence and importance in the community and could be compared with inter-community.

在本研究中,应用密度类群指数分析土壤无脊椎动物多样性的结果比应用Shannon-Wiener多样性指数的结果更为理想,这是因为土壤无脊椎动物由于组成结构复杂,不同类群的个体数量往往存在着巨大的差异,例如蜱螨目的较大数量常掩盖了其它类群的重要信息,多样性指数不能体现这一情况,而密度类群指数是基于各物种在群落中都有同等独立性,宜在不同群落间进行同种类比较的假设,对于复杂的土壤节肢动物群落多样性的测定可获得比较贴切的结果。

Calculating early warning index by multi-objective decision-making rule. The results are consistent with autoptical work.

根据多目标决策准则,采用状态指数和和隐患指数的并合方法计算预警评价的结果指数。

With the practice and research on the grade-determination of the cultivated land , the paper, based on the concept and purpose of the grade-determination of the cultivated land , has analysed the problems existing in the course of practice and summarized the reasons about " the rules of the grade-determination of farming land " which the Ministry of Land and Natural Resources had issued , including the issues about dependence between grading index of cultivated land and utilizing index ,or dependence between grading index of cultivated land and natural index , lack of the nationwide comparativity of the achievement on grade-determination of the cultivated land ,the sudden change indexes between the paddy field and its adjoint nonirrigated farmland, the representativeness of appointed crop and so on.

通过耕地分等的实践和研究,文章从耕地分等的内涵和目的出发,对国土资源部颁布的《农用地分等定级规程》在实践过程中所存在的问题及其原因进行了归纳和分析,其中包括耕地等指数与自然等指数、利用等指数的相关性问题,耕地分等成果在全国范围内缺乏可比性问题,相邻地块间水田和旱地的等指数出现突变问题,指定作物的代表性问题以及熟制问题等。

The steel and iron tectonic plate index was chosen as dependent variable,and several macro economy factors which may affect the steel and iron tectonic plate index were chosen as independent variable.

以钢铁板块指数作为因变量,选取宏观经济中能影响钢铁板块指数的指标,运用SPSS软件对数据进行回归分析并建立回归模型,分析得出影响钢铁板块指数的宏观因素。

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On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面,更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值,分为几个相等的区间作为横轴,并将各区间内所测定值依所出现的次数累积而成的面积,用柱子排起来的图形,也叫做柱状图。

You rap, you know we are not so good at rapping, huh?

你唱吧,你也知道我们并不那么擅长说唱,对吧?