查询词典 representative sample

Rarely, a sample of skin scrapings or a small sample of skin will be sent to the laboratory for examination under a microscope.

很少，样本皮肤scrapings或小样本的皮肤将被送到实验室检验在显微镜下观察。

The computational results show that the proposed method improves the sequential mesh test method, both by depressing the risk and by reducing the truncated sample size and the average sample size.

实验结果表明，该方法对序贯网图法的改进是全方位的，不仅可以降低二类风险，而且所需的截尾样本量和平均试验量也更少。

I just pressed the Depth-of-field button to make sample exposure after sample exposure until it was framed just right, then pressed the shutter release.

我只是按下景深按钮，使样品暴露后，样本曝光，直到它被诬陷恰恰好，然后按下快门释放。

This book is big sixteenmo printed and compiled in both Chinese and English with the price of RMB 380. There are 2 pictures in each page in superb bindings. Part of it is processed by UV technology could truly reappear the natural color and sense of reality of stones. It is compiled according to the proportion of 1:1 and united code all the marks, sample's name, producing area, physical character, Shore Hardness, chemical composition, lg. loss, reserves, sample supplier etc. in detailed and exact data.

图鉴》采用大十六开，中英文对照编写，定价：380元；每个页码两幅图片，装帧精美，局部采用UV技术处理，真实再现石材的天然色泽与质感；样品按照1：1比例编辑，并将全部标注统一编号、样品名称、产地、物理性能、萧氏硬度、化学成分、烧失量、矿山储藏量、样品提供商等，数据详实准确。

By synthetically analysizing the physical and chemical properties of all components and particle size, the content of F2641 in the JOB-iC is determined by gravimetric analysis after F2641 is seperated from HMX,TATB and PNP through ? alkali reflux. Determination conditions is set as follows the sample is boilingly refluxed for six hour in a constant temperature bath after adding lOOm! 8.0 ?? 0.1% NaOH. The solvent DMF saturated by TATB is used for extracting HMX,F21 and PNP from the sample and TATB is seperated by crucible filter G4. The mass precent of TATB is determined by extraction fractionation. The mass percent of PNP is measured by multiwavlength linear regression ultraviolet spectrophotometry. The testing conditions are set as follows:multiwavlength constitution: X=267nxn, 275nm, 283nm, 29mm, 299nm,the application scope of the Lambert-Beer law: the concentration of PNP is O.005?0.O25mgIml, the concentration of HMX is 0.060.3Omg/ml,absorption coefficents of PNP and HMX are solved by the slope of linear regression curve of absorbency- concentration of standard solution of PNP and HMIX for measuring wavelengthes,on the basis of the Lanibert-Beer law and absorbancy additivity principle, the slope of linear regression curve of A/E(1) and E1 of PNP and HMX solution is regarded as the concentration of PNP in the solution.

根据传爆药中各组分的物理、化学性质及主体炸药的粒度大小，进行综合分析，确定了采用碱回流重量法测定JOB-1C 中F_(2641)的含量，测定条件：加入100ml浓度为8.0±0.1％的氢氧化钠，在恒温水浴中煮沸回流6h；采用溶剂萃取法测定JOB-1C中TATB的含量，选择TATB饱和的二甲基甲酰胺为萃取溶剂，用G4坩埚式过虑器进行萃取分离；采用多波长线性回归紫外分光光度法测定JOB-1C中PNP的含量，通过实验确定了多波长组合：λ=267nm，275nm，283nm，291nm，299nm；朗波—比耳定律的适用范围为PNP浓度：0.005～0.025mg/ml，HMX浓度：0.06～0.30mg/ml；在测定波长下，对PNP、HMX标准溶液的吸光度—浓度进行线性回归，由回归曲线的斜率得出PNP、HMX的吸收系数；根据朗波—比耳定律和吸光度加和性原理，在测定波长下，对PNP、HMX 两组分混合溶液A_i/E_HMX(i与E_PNP(i/E_HMX(i进行线性回归，回归曲线的斜率即为混合溶液中PNP的浓度。

BSpatial characterization of laser induced Cu plasma in air with different laser focusing distancesThe plasma spectra induced by pulsed laser ablation of copper target are measured. By adjusting the distance of the len-sample, the spectrum of air spark plasma、 Cu plasma and the reciprocity of both plasmas are analysed. From the result, it has been shown that the focusing of the laser beam has an important infunence to analyse the properties of the sample.

b 不同的激光焦点位置产生的等离子体光谱的空间特性研究激光烧蚀置于空气中的Cu靶产生等离子体，通过调节透镜与Cu靶的距离，本文观测了激光烧蚀空气产生的空气火花等离子体、激光直接烧蚀铜靶产生Cu等离子体以及空气火花等离子体与Cu等离子体相互作用等不同情况下的激光诱导击穿发射光谱，激光束焦点的位置在分析材料性质的过程中有着重要的影响。

Technique details were optimized about steps from sample treatment to gel staining, and 2 - DE gels are lampros and aequalis distributed , the method of sample treatment suitable for mass spectrography analysis.

优化从样品处理到凝胶染色几个过程的技术细节，蛋白表达谱清晰且分布均匀，样品处理方法适合后期的质谱测试分析。

By using the ARL-9800XP fluorescence spectrology of Switzerland,the sample is made by lithium tetraborate and lithium metaborate composite menstruum ,And through the method of brillianting the standard sample,we have realized the on-line analysis of the elements in manganin,i.

利用瑞士ARL-9800XP型荧光光谱仪，采用四硼酸锂和偏硼酸锂混合熔剂熔融制样，通过灼烧标准样品的方法，实现了锰矿中Mn，Fe，Si，Al，Ca，Mg等元素的在线分析，缩短了分析时间，提高了工作效率，降低了劳动强度。

These results indicates the rotate of two sample machines is low when reaching rating voltage, the starting resistance torque, efficiency of No.2 and increasing temperature of two sample machines satisfied the requirement of GB.

通过分析可得：两台样机的起始建压转速低，温升达到了国标要求；Ⅱ号样机的起动阻力矩、效率均达到了国标要求。

The different proportion of high fineness lime stone, GGBS powder and fly ash was added into P-I 42.5R Portland cement to prepared several samples by orthogonal experiment design, the particle size distribution of sample was obtained by RRSB linear regress and the physical performance of the sample was tested.

按正交试验方法设计了不同比例高细石灰石粉、矿渣粉和粉煤灰掺入到P·I42.5R硅酸盐水泥中的多组样品，使用RRSB线性回归得到样品的颗粒群分布，并检验样品的物理性能：结果表明，高细石灰石粉和矿渣粉可以明显改善水泥的粒度分布，增加水泥细微颗粒含量，显著提高水泥早期、后期和长期强度。

Many will continue to choose to live in duality and in conflict.

许多人将继续选择活在二元对立性和冲突中。

I find that students of the University of Physical Education all wear sportswear at first sight.

我发现：体育大学的学生乍一看，都是穿运动衣，大家都一样