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取样体积
相关语句
  sampling volume
     Sampling Volume and Grade Error for Gold Placers
     砂金取样体积与品位误差
短句来源
     If the average grain size is not greater than 25 mm or the boulder content is not greater than 0.14, the sampling volume may take a value smaller than 2 ~2m~3;
     且有随矿砂层巨砾含量和分选系数的增大而增大的趋势,当矿砂层的平均粒径不大于25mm或巨砾系数不大于0.14时,砂金取样体积可小于2(?) ;
短句来源
     while the average grain size is greater than 55mm. or the boulder content is greater than 0.38. the sampling volume better take a value greater than 2 ~2m~3 in such cases.
     当平均粒径大于55mm或巨砾系数大于0.38时,取样体积则应大于2(?)
短句来源
     In line with the problems arisen in the determination of zinc ions in the circulating water by zinc reagent spectrophotometry, an inquiry is made into the method in terms of sampling volume, zinc reagent dose, preparation of zinc reagent, and interference by organophosphorus, the analytical method is perfected, its accuracy improved, its operating conditions optimized, and a reference is offered for the analysis of zinc in other samples in future.
     针对锌试剂分光光度法在测定循环水中锌离子出现的问题 ,从样品的取样体积、锌试剂用量、锌试剂的配制、有机膦的干扰等出发 ,对该方法进行了探讨 ,完善了分析方法 ,提高了该方法的准确度 ,优化了操作条件 ,为以后其它样品中锌的分析提供了参考。
短句来源
     Results of author's experiments show that this grade error tends to increase with the decrease of sampling volume and the increase of the boulder content as well as sorting coefficient of the placer.
     笔者所做的砂金取样规格试验表明,砂金品位误差随着取样体积减小而增大.
短句来源
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  “取样体积”译为未确定词的双语例句
     When the DTPA of110 μg is added into the urine, the recovery of DTPA is 100.9% and theprecision is better than±2%.
     当 DTPA 加入量为110μg 时,回收率为100.9%,精密度优于±2%。 取样体积5mL 时,方法探测下限为1.2μg/mL。
短句来源
     the precision varies for 0.2μg Cu was 1.5% and the detection limitsof present method are 3×10~(-9)g/ml.
     对于0.2μg的铜变动系数为1.5%,以取样体积为5ml计,最小检出浓度有3×10~(-9)g/ml。
短句来源
     At sampling flow rate of 0.3 L/min,thecollection efficiency of this system for HTO in effluent from stack ishigher than 97% when sampling time is 168 hours, and its oxidationefficiency for HT is higher than 95%.
     该装置能区分HTO和HT两种形态的氚,在取样体积流量为0.3L/ni,取样时间为一周(168h)时,系统对HTO的收集效率高于97%,对HT的氧化效率高于95%。
短句来源
     The optimum condition for the ISE-FIA to determine gold in ores are 0.005mol/L HCl-0.01‰ NaCl as carrier stream, 5.1ml/min of flow rate, 150ul sample volume and 10cm long of reaction tube. About 100 samples can be analysed per hour.
     载流0.005mol/LHCI—0.01‰ NaCl,载流流速5.1ml/min,取样体积150μl,采样频率可达100个/h。
短句来源
     The FD-129 can also be used for measuring the concentration of R n emanation.
     FD-129型氡钍射气测定仪在取样体积为1升的情况下,测量射气下限对氡为0.2爱曼,对钍为0.3爱曼。
短句来源
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  相似匹配句对
     Sampling Volume and Grade Error for Gold Placers
     砂金取样体积与品位误差
短句来源
     Sampling Device of Synthetic Resin
     合成树脂取样装置
短句来源
     OMNIPOTENT VOLUME FORMULA
     万能体积公式
短句来源
     Multi-Sampling Effect
     多次取样效应
短句来源
     Get Volume Cleverly
     巧求体积
短句来源
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  sampling volume
Discrepancies may result from high plasma protein binding of propofol, intracranial pathology and sampling volume.
      
Two techniques are described based on high-vacuum or hot air pretreatment which lowered the blank to less than 1 ppt (sampling volume 10 and 60 l, respectively).
      
The influence of the flow rate on the maximal sampling volume is examined.
      
The relative standard deviations for 1.0 μg/ml zinc and 5.0 μg/ml mercury with 100 μl sampling volume were 0.43% and 0.62%, respectively, for 8 parallel determinations.
      
A detection limit of 9.0 ng/m3 can be achieved on a total sampling volume of 1000 L.
      
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The membrane filters sampled at a height of 60 m and at ground lcvel were processed with a drop freezing technique and the static vapor-diffusion chamber. Comparisons of IN concentrations obtained by the two techniques were made. The blank filter counts and ice nucleus measurement reproducibi lity were analysed. The factors affecting IN concentration measurements are discussed and some favorable operation conditions suggested. It was found that: a. the IN concentrations typically range from 0.2 1~(-1)to 2.0...

The membrane filters sampled at a height of 60 m and at ground lcvel were processed with a drop freezing technique and the static vapor-diffusion chamber. Comparisons of IN concentrations obtained by the two techniques were made. The blank filter counts and ice nucleus measurement reproducibi lity were analysed. The factors affecting IN concentration measurements are discussed and some favorable operation conditions suggested. It was found that: a. the IN concentrations typically range from 0.2 1~(-1)to 2.0 1~(-1)at -20℃, b. significant time variations in IN concentrations occurred, c, the IN concentrations obtained by the drop-freezing technique typically exceeded the diffusion chamber values,d. the two variatin trends were generally in phase,e. high IN concentrations often were associated with precipitation events.

在70米高度和地面分别用憎水型滤膜收集大气冰晶核。取样体积为100升。同时用水滴冻结法和温度梯度扩散云室处理滤膜。分析本底浓度值和重复率。考虑滤膜污染、结霜、延迟处理和涂油等的影响。比较两种方法测定的浓度大小。在-20℃时典型的冰晶核浓度的变化范围为0.2-2.0升~(-1),浓度随时间而变化。水滴冻结法测定的浓度一般大于扩散云室法。二者的时间变化趋势通常为一致。高浓度的出现往往与降水有关。

This article introduces the method of spectrometric emanometry for measuring the emanation concentration of Rn and Th, using double-filter. The theoriticle analysis, experinental proof as well as result of field testing are also presented. Based on this method, the radon and tho-ron emanometer, Model No.FD-129, was developed. The instrument is very useful for monitoring the Th emanation in the field application, especially for where it coexists with Rn. The FD-129 can also be used for measuring the concentration...

This article introduces the method of spectrometric emanometry for measuring the emanation concentration of Rn and Th, using double-filter. The theoriticle analysis, experinental proof as well as result of field testing are also presented. Based on this method, the radon and tho-ron emanometer, Model No.FD-129, was developed. The instrument is very useful for monitoring the Th emanation in the field application, especially for where it coexists with Rn. The FD-129 can also be used for measuring the concentration of R n emanation.

本文提出了双层滤膜能谱法测定氡、钍射气浓度的方案,对方案进行了理论分析,实验论证和现场试验,证明方案是成功的。并在此基础上研制成FD-129型氡钍射气测定仪。为现场尤其是铀钍混合场下钍射气的测量提供了方法和仪器。同时亦可测量氡射气浓度。 FD-129型氡钍射气测定仪在取样体积为1升的情况下,测量射气下限对氡为0.2爱曼,对钍为0.3爱曼。

An error is always existed between the gold content data obtained from the limited sampling volume and the true grade of the placer. because of its uneven distribution. It is necessary to decide a reasonable sampling volume within a limit of allowable error. Results of author's experiments show that this grade error tends to increase with the decrease of sampling volume and the increase of the boulder content as well as sorting coefficient of the placer. If the average grain size is not greater than 25 mm or...

An error is always existed between the gold content data obtained from the limited sampling volume and the true grade of the placer. because of its uneven distribution. It is necessary to decide a reasonable sampling volume within a limit of allowable error. Results of author's experiments show that this grade error tends to increase with the decrease of sampling volume and the increase of the boulder content as well as sorting coefficient of the placer. If the average grain size is not greater than 25 mm or the boulder content is not greater than 0.14, the sampling volume may take a value smaller than 2 ~2m~3; while the average grain size is greater than 55mm. or the boulder content is greater than 0.38. the sampling volume better take a value greater than 2 ~2m~3 in such cases. the relative error of the gold grade due to limited sampling volume collected from the placer will be less than 20%.

由于砂金矿层中砂金分布的不均匀性,使有限体积的取样所取得的砂金品位数据,与矿砂层真实品位之间存在误差。因此,在允许接受的误差范围内,有必要确定最合理的采样体积。笔者所做的砂金取样规格试验表明,砂金品位误差随着取样体积减小而增大.且有随矿砂层巨砾含量和分选系数的增大而增大的趋势,当矿砂层的平均粒径不大于25mm或巨砾系数不大于0.14时,砂金取样体积可小于2(?);当平均粒径大于55mm或巨砾系数大于0.38时,取样体积则应大于2(?),这可保证砂金取样由于体积有限而带来的品位相对误差小于20(?)。

 
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