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sampling and test
相关语句
  采样和测试
     Different Raw Yarn Sampling and Test Methods Effect on Nylon66 Twist Cord Lower Strength Calculated Value
     锦纶66原丝采样和测试方法对帘线强损值计算的影响
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  “sampling and test”译为未确定词的双语例句
     At present time, the steel 20CrMo is produced according to GB/T3077—99 in our company. In order to produce high grade gear steel, sampling and test were made by according to GB/T5216, the processing quality of concasting billet supplied by Pangang Steel was investigated in detail, the main performance index of bar steel 20CrMo in our company was obtained.
     目前我公司的20CrMo主要按GB/T3077—99生产,为了生产高档齿轮钢的需要,课题组按GB/T5216标准取样检测,对20CrMo攀钢连铸坯工艺质量做了比较详细的研究,掌握了目前我公司生产的20CrMo棒材产品的主要性能指标状况。
短句来源
     Besides, it is important to ascertain the model parameter, but in practice the parameter always changes largely, which makes infection to the result, because of sampling and test instrument and test method and process and the sleight degree of workers and so on.
     此外,在计算模型参数确定的过程中,由于取样制样、试验仪器、试验方法与过程、试验人员操作熟练程度等诸多因素,使各个参数变化较大,对计算结果会有一定影响。
短句来源
     The different raw yarn sampling and test method effect on Nylon66 twist cord lower strength calculated value are investigated.
     研究锦纶66原丝不同取样方法和测试方法对捻织工序帘线强损值计算结果的影响.
短句来源
     Various sampling methods for joint quality test of hot-rolled steel bar are introduced and discussed from flash butt welding, arc welding, electroslag welding and other aspects. According to different joints various sampling and test results evaluation methods are introduced in detail.
     介绍了热轧钢筋接头采取的多种方法,从钢筋闪光对接焊接头、钢筋电弧焊接头、电渣压力焊接头等方面进行了阐述,对各种钢筋接头检验取样方法及试验结果评定做了详细的说明。
短句来源
     For obtaining the property and ingredient parameters of green sand contemporary and quickly, a multifunctional test system of evaluating green sand has been introduced, which consists of automatic sampling and test, pneumatic control loop, test and control part by MCU and PC.
     为了同时快速获得表征湿型砂质量的主要性能和组分参数,研制了一种多工位湿型砂质量测试系统,该系统主要由自动制样与测试机构、气动控制回路、单片机测控单元及PC机等四大部分构成。
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  相似匹配句对
     ON THE DOUBLE SAMPLING
     关于双重抽样
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     Sampling survey
     抽样调查
短句来源
     Random Sampling
     随机抽样
短句来源
     On the Sampling Theorem and Wavelets
     小波分析在抽样定理中的应用
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     Variable sampling in ultrasonic testing
     超声检测中变采样问题研究
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  sampling and test
The proper understanding and use of the chamber techniques, material sampling and test specimen preparation is crucial of obtaining reliable results.
      
Sampling and test methods for determining materials strength and other properties are similarly contained in Chapters 5 through 8.
      
A supplement to this document will be published later to address sampling and test methods relating to air contamination.
      


The number (ηt) of sample trees for physical and mechanical tests can be calculated by the-following equation: n_t=2~2 CV_t~2/εWhere CV_t: the estimated value of coefficient of variation of population with tree mean as the unit (percent); ε: allowed deviation (percent).One bolt is taken at the middle of height to lowest branch from each sample tree, which canbetter represent the mean value of properties of the trunk (Tab. 2.3). It seems that the traditional method for taking the bolt at the breat height...

The number (ηt) of sample trees for physical and mechanical tests can be calculated by the-following equation: n_t=2~2 CV_t~2/εWhere CV_t: the estimated value of coefficient of variation of population with tree mean as the unit (percent); ε: allowed deviation (percent).One bolt is taken at the middle of height to lowest branch from each sample tree, which canbetter represent the mean value of properties of the trunk (Tab. 2.3). It seems that the traditional method for taking the bolt at the breat height upwards, which makes the large log below the b. h. short and out of grade, should be changed. The test pieces can be taken at one radius from a large bolt because the difference of properties between opposite radius taken at random is generally not significant (Tab. 2.1). The variation of radial position at one level in the trunk is usually significant (Tab. 2.1). According to the analysis on nine samples of Chinese fir and Masson pine the variability of properties within the tree is significant and is greater than that between the trees(Tab.2·4).The optimum number of test pieces for each tree can be estimatedby the following equation: S(?)%=(S_T/(n_t)~(1/2)×100)/(?) (1+(S_s~2/u_sS_T~2))~(1/2)=S(?)T(1+r/n_s)~(1/2) where S(?): standard error of sample mean;S_T~2: component of variance between trees;S_s~2: variance within trees;n_t: number of Sample trees;n_s: number of test pieces per tree;r: S_s~2/S_T~2;S(?)T:(S_T/(n_t)~(1/2))/(?)t.The CV_s and CV_t, coefficients of variation with test piece as the unit and with tree mean as the unit respectively, approximately show a linear relationship (Tab. 3) with which the estimated value of CV_t is calculated from the value of approximate upper-limit of CV_s.According to the analysis of the existing data of a quantity of tests done the CV_t in equation (1) and the sample size can assume the estimated values as follows. The sampling method drawn has been principally proved on the level ε=15%and the results show that it can most likely satisfy the scheduled precision and realize economical efficiency.Some proposals for revision have been brought up on the sampling and testing method for a lot of timber of architectural engineering [GBJ5—73 (temporary standard)].

木材物理力学试验的样木株数n_t可按下式计算 n_t=2~2CV_t~2/ε~2 式中CV_t:以株平均数为单元,总体变异系数的估计值(%); ε:允许偏差率(%)。 每株样木在枝下高中部取一段试材,可以较好地代表其主干的材性平均值(表2·3),从胸高处向上截取试材的传统方法,使胸高以下一段大材成为短的非规格材,似应改变。直径大的试材可在一个半径取试件,因为随机二相对半径间的材性差异一般不显著(表2·1)。沿着半径的变异通常显著(表2·1)。根据对杉木和马尾松的九个样本的分析结果,材性在株内的变异显著,并大于株间(表2·4)。 每株样木的适宜试件数可通过下式估计式中S_x-:平均数的标准误差; S_T~z:株间方差的分量; S_S~z:株内方差; (?)_t:以株平均数为单元的样本平均数; n_t:样木株数; n_s:每株样木的试件数;

Impact value is one of the criteria to evaluate material toughness. The sampling and impact testing methods vary a lot; but the relationship between each sampling and testing method is mostly concerned. This paper discusses the relationship between the results obtained with all sampling and testing methods in ASTM E-23 in order to reveal the effects of different specimen and different testing method on the impact value.

冲击值是评价材料韧性的指标之一。冲击的取样试验方法多种多样,但人们关心的是各种取样试验方法之间的联系。本文讨论了ASTM E-23中所有取样试验方法得出结果之间的关系,旨在揭示不同试样、不同试验方法对材料冲击值的影响。

In gas chromatograghy analysis of transformer oil, one usually meets some promblems in sampling and testing process, such as how to handle carrier gas, insert gasket, sample inserting and injector etc. These promblems can be solved by taking suitable measures accordingly and careful operations to perform the analysis. The accuracy and capability of diagnosis of potential transformer fault can be further improved thereby.

气相色谱法检测变压器油工作中,取样、测试诊断过程、载气、进样垫的使用、进样与注射器等是常见的问题,正确解决上述问题,采取相应的对策及措施,在严格操作技术上使色谱分析的精确度和诊断变压器故障能力得到进一步提高.

 
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