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统计样本
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  statistical samples
     The concentrations of neavy metals in 70% of statistical samples were found to be lower than 20 mg/kg for As, 2.8 mg/kg for Cd, 250 mg/kg for Cr, 417 mg/kg for Cu, 5 mg/kg for Hg, 75 mg/kg for Ni, 130 mg/kg for Pb and 1701 mg/kg for Zn, respectively.
     70 %统计样本的As含量在 2 0mg kg以内 ,而Cd、Cr、Cu、Hg、Ni、Pb、Zn含量则分别在 2 8、2 5 0、4 17、5、75、130、170 1mg kg以内 .
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     This kind of summation method does not require the probability distribution of each random vector is within the interval (0, 2π) in phase angle, so less statistical samples value is to be used.
     这种求和方法不要求各个随机矢量在相位上具有0~2π的概率分布,使用的统计样本值较少。
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     In order to improve reliability of probabilistic seismic hazard analysis, shallow earthquake (depth<70 km) data, which were recorded with location precision of 1 or 2 by modern instruments and contain depth information after 1970, are selected as statistical samples, as well as northern China seismic region, middle China seismic region, southern China seismic region, Xinjiang seismic region and Qinghui|Xizang Plateau seismic region are chosen as statistical units to study the depth distribution characteristic of shallow earthquakes.
     选取 1970年以来现代仪器记录到的含有深度信息、定位精度为 1、2类的浅源地震(深度小于 70km)资料作为统计样本 ,以华北地震区、华中地震区、华南地震区、新疆地震区和青藏高原地震区为统计单元 ,分析研究浅源地震随深度的分布特征 ,以便进一步提高地震危险性分析的可靠性。
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     The application of EM(Expectation Maximization) algorithm in the statistics of incomplete data is studied,which can enlarge the volume of statistical samples so as to avoid the difficulty of statistics and analysis resulted from questionnaire data missing in navigation research,and further to improve the precision of parameter estimation.
     探讨期望最大化(Expectation Maximization,EM)算法在处理不完全数据统计中的应用,通过EM补缺,扩大统计样本数量,以避免航海科研中常常发生的问卷调查数据的缺失而造成统计分析的困难,从而提高了参数估计精度。
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     Through the analysis on all factors influencing the grade of the roa d rock slope and the selection of statistical samples, this paper establishes th e relational expression, determines the grade of common road rock slope by using the stress comparison method, the empirical analysis method and the typical the oretical model analysis method, and affirms the feasibility of the method with e xamples.
     通过对影响岩石边坡坡度各因素的分析及统计样本的选取,建立了坡度计算的关系式,用应力比较法、经验分析法、典型理论模型分析法,对道路普通岩石高边坡坡度进行了确定,并通过举例,确认了方法的可行。
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  statistical sample
     This paper selects "Acta of Methmetics", "Acta of Physics" and "Acta of Chemistry" as the statistical sample, and makes a comparison research for some indicators , the kind of coauthor, the situation of fund substrized for the paper, the biographical distribution and organization distribution of 3073 papers published in these 3 Journals in 1986—1990. On this basis, it further discusses the characteristics of mathematical research, and raises three points of revealation to promote the research development of domestic mathematics.
     本文选择《数学学报》、《物理学报》和《化学学报》为统计样本,对3种学报1986—1990年间3073篇学术论文的参考文献各项指标、合著类型、基金资助论文情况,以及论文的地域分布和机构分布作了比较研究。 在此基础上,进一步探讨了数学研究的特点,并提出对促进我国数学研究发展有益的3点启示。
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     This Paper took Chinese mathematical documents included in MR (1984 - 1993) as statistical sample, on respect of subject distribution, it compared Chinese mathematical development with interntional mathematical development. Especially by combining with those achievements in imporatnt items of the" 7. 5" and "8. 5" mathematical researchment sponsored by National Natural Science Fund, this paper also discussed the tendaucy of Chinese mathematical research development.
     本文以国际性评论、文摘刊物《MathematicsReviews》(美国数学会出版)在1984-1993年间摘录文南总量和摘录中国数学研究文献量为统计样本,从分支学科文献量分布的角度,比较了中外数学研究的现状.特别结合国家自然科学基金“七五”、“八五”数学重大项目的研究成果,探讨了目前数学研究的发展趋势.
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     Based on the 2505 coding sequence and relative non coding sequence of the first category of yeast genes as statistical sample,the distribution of bases in the coding starting region, coding terminal region and non coding region of Yeast is given.
     以酵母全基因组中第一类的 2 50 5个编码序列和相对应的非编码序列为统计样本 ,给出了酵母编码起始区和编码终止区以及非编码区碱基的分布特征 .
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     In the flood insurance, the sample information gotten doesn′t accord with the theory requset for the statistical sample.
     在洪水保险中,获得的样本信息不符合对统计样本的理论要求。
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  “统计样本”译为未确定词的双语例句
     The experiment indicated that low level laser reversibly reduced the amplitudes of I_K in a time-dependent and voltage-dependent manner. The percentage of inhibition was up to 34.54%±3.22%(n=15) in irradiating 5 min.
     实验发现,弱激光对延迟整流钾电流IK有抑制作用,且抑制呈时间依赖性,5min激光抑制作用达到稳定,抑制百分比为34.54%±3.22%(统计样本数n=15);
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     With bibliometrical method,based on the 844 articles published in Journal of Shangluo University in the year 2000-2005,it shows that the articles in each issue is 32.5 in average,with 0.295 in each page,and 3.39 pages for each articles.
     利用文献计量学方法,以《商洛学院学报》2000~2005年发表的844篇论文为统计样本,统计结果显示,期均发文量32.5篇,篇密度为0.295篇,篇均页数3.39页;
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     The 278 papers published in Journal of Xiaogan University (Natural Sciences Edition) during 1996-2003 in total 10 issues were analyzed statistically.
     以《孝感学院学报》(自然科学版)1996 2003年共10期学报上发表的278篇论文为统计样本,对每期载文量、信息密度、学科分布、论文作者基本情况等进行了统计分析。
短句来源
     The amount of papers published, average pages for one paper, contents of papers, publication period for one paper, the portion of papers with funds aid of 376 papers published in Journal of Building Materials from 1998 to 2002 are concerned.
     以《建筑材料学报》1998~2002年发表的376篇论文为统计样本,对其载文量、信息密度、载文内容、发表时滞、基金资助论文数等情况进行了统计与分析.
短句来源
     Firstly, according to the statistical phenomenon and analysis come from the time series curve of total technological sciences and time series curve of different-layer technological sciences drawn by our team, we preliminarily partition the development history of technological sciences from the Renaissance to the time when the source of statistics ends into three phases: 1440-1819, 1820-1914 and 1915-1987.Secondly, according to J.
     首先,通过对本课题组前期研究工作中所获得的技术科学总体发展时间序列特征曲线和不同层次技术科学发展时间序列特征曲线中统计现象和结果的分析,把文艺复兴以来到统计样本的截止年代之间的技术科学发展过程初步划分为三个阶段:1440-1819年阶段、1820-1914年阶段、1915-1987年阶段。
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  statistical samples
In order to calculate updated coefficients for atmospheric temperature retrieval from satellite sounding data and radiosonde data, it is necessary to form statistical samples of real radiance and radiosonde data matchups.
      
It is verified that, ifN is the dimension of the CI problem, the size of the statistical samples must grow as
      
These widths and their variations indicate that the two statistical samples of spot groups may be produced by two families of flux-tube clusters as suggested earlier in a phenomenological model.
      
Very thin flux-tube clusters in the statistical samples seem to be related to the ephemeral active regions and X-ray bright points.
      
In one phase of DDRP, land use, wetland, and forest cover data were collected for statistical samples of 145 Northeast lake and 35 Southern Blue Ridge Province stream watersheds in the United States.
      
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  statistical sample
The statistical sample of event of double KS-meson production was accumulated in π-p interactions by using a beam of 40-GeV pions from the U-70 accelerator of the Institute of High Energy Physics (IHEP, Protvino).
      
Under conditions of 4π coverage, the production of cumulative protons in π-C, pC, 4HeC, and CC collisions at high energies is studied on the basis of a large statistical sample.
      
Effects of finite statistical sample size are discussed in detail.
      
Despite the small statistical sample, the average change in the reflected light intensity is still significant (p >amp;lt; 0.025, paired Student's t-test).
      
We ran this program on a 15% statistical sample of 50,000 studies (7500 studies examined).
      
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The longitudinal wave induced stress which is the main part of hull girderstrength has been measured by the statistical strain apparatus fixed on severaldry cargo ship which make a voyage from China to Europe.Based on long-term accumulation of the data of stress,we apply themethod of mathematical statistics to analyse them,and come to the conclusionthat the frequency function of stress for the statistical sample of one voyagecoincide with negative exponential distribution.A method to predicate the maximun stress...

The longitudinal wave induced stress which is the main part of hull girderstrength has been measured by the statistical strain apparatus fixed on severaldry cargo ship which make a voyage from China to Europe.Based on long-term accumulation of the data of stress,we apply themethod of mathematical statistics to analyse them,and come to the conclusionthat the frequency function of stress for the statistical sample of one voyagecoincide with negative exponential distribution.A method to predicate the maximun stress level for ship's whole life isalso presented in this paper.

船舶的波浪诱导纵向应力是决定船舶纵强度的重要组成部分。本文通过安装在船舶上的统计应变仪,长期积累,波浪诱导纵向应力数据,应用数理统计方法对测量数据进行分析,得到常规的万吨级干货船在中—欧航线上,以一个航次为统计样本的波浪诱导纵向应力符合负指数分布,并求得在船令期内船舶可能遭遇到的最大波浪诱导纵向应力值。

The paper uses regression analysis procedures to investigate the attenuation of ground motion parameters, such as maximum peak acceleration, peak velocity, peak displacement, effective peak acceleration and time duration, etc.The data base used consists of 133 free-field acceleration records which come from home and abroad including records of magnitude above7,near-field and records on bedrock site. Instead of the traditional classification of site the predominant period of site has been employed to characterize...

The paper uses regression analysis procedures to investigate the attenuation of ground motion parameters, such as maximum peak acceleration, peak velocity, peak displacement, effective peak acceleration and time duration, etc.The data base used consists of 133 free-field acceleration records which come from home and abroad including records of magnitude above7,near-field and records on bedrock site. Instead of the traditional classification of site the predominant period of site has been employed to characterize the site condition in the procedure.

本文利用笔者所收集的133条国内外重要强震加速度记录进行统计回归分析,得到反映强震地面运动最大峰值加速度、峰值速度、峰值位移、有效峰值加速度及持续时间衰减规律的回归公式。这些记录中所含七级以上大震、震中距小于20公里的近场记录和基岩上的记录较过去许多研究者用以进行统计的记录要多。统计样本中各类数据的分布比较合理。采用场地等效固有周期(以下简称场地固有周期)取代常用的场地分类形式进行统计,在一定程度上克服了场地分类标准不明确的缺点。场地固有周期依据地质钻探资料计算,从而能比较准确地反映与场地特征有关的强震地而运动衰减规律,为实际工程应用提供可靠的经验公式。

The size distribution and distribution function of ice crystals within mixed and cold cloud in Inner-Mongolia, Shan Xi, and Xin Jiang region were given. The size distribution of ice crystals may be classified to mono-decreasing type and non-mono-decreasing type. The size distribution function may be fitted with exponential for-mulaN (D)=N0exp (-XD). Samples of correlation significance level α<0.01 hold 99% or more of total samples. Within cold cloud distribution parameters N0 and λ increase with cloud temperature...

The size distribution and distribution function of ice crystals within mixed and cold cloud in Inner-Mongolia, Shan Xi, and Xin Jiang region were given. The size distribution of ice crystals may be classified to mono-decreasing type and non-mono-decreasing type. The size distribution function may be fitted with exponential for-mulaN (D)=N0exp (-XD). Samples of correlation significance level α<0.01 hold 99% or more of total samples. Within cold cloud distribution parameters N0 and λ increase with cloud temperature decreases. While at T<-10℃ layer, N0and λ increase apparently. We proposed the correlation relation between the N0and λ in the form of N=σλβ.

本文给出了我国北方混合性、冷性层状云中冰晶(直径范围18—334μm)尺度谱分布特征和分布函数。冰晶尺度谱可归纳为单调下降和非单调下降两大类型,分布函数可用指数关系系N=N_0exp[-λD]来拟合,相关显著水平α<0.01的样本,占本文统计的样本99%以上。 冷性云中,谱分布参数N_0和λ随云中温度降低而增大,在云中温度T<-10℃时,增大更为明显。谱分布参数N_0和λ之间可用幂指数关系N_0=σ_iλ~(βi)来拟合,相关显著水平α<0.01。系数σ_1、β_i与云中有无冰晶繁生过程有关。

 
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