查询词典 sampling fraction

The low-temperature resistivity of filling skutterudite increases with the increase of temperature. However the slope of the resistivitytemperature curves are different. The curve of the sample with low filling fraction is smooth, and that of the samples with high filling fraction is sharp. It is caused by the existence of the impurities in the samples with low filling fraction.

填充型方钴矿材料的低温电阻率随镧填充率的变化规律与室温相同，但不同填充率的方钴矿材料的电阻率随温度变化的曲线的斜率不同，低填充率样品随温度变化趋势明显地比高填充率样品平缓，这种现象主要是由存在于低填充率样品中的杂质相引起的。

The SPC-2S fraction with 30% EtOH were constituted epicatechin and epicatechin gallate ester ;The SPC-2S fraction with 50% EtOH contained epicatechin and dimeric procyanidins, another SPC-3S contained epicatechin ,dimeric procyanidins and trimeric procyanidns ;Dimeric procyanidins and trimeric procyanidns constitute SPC-5S fraction;monomer dimer trimer tetramer pentamer of procyanidins were the major fractions in 70% acetone elute solution.

1和 2.01：1，也以添加0.1%SPC酒样中两者的比例最为协调；对小曲酒中酸的影响表现为，添加SPC后有利于降低酒样中乙酸的含量，各酒样中乙酸的量随着SPC添加量高粱外种皮中原花青素及其对小曲白酒挥发性成分影响机制研究的增加而降低；对醛类的影响为，添加SPC可降低酒样中糠醛的含量，其中以添加 0.1%SPC酒样中含量最低，为对照组的39.3%，而4个酒样中乙醛含量则无明显差别；低SPC添加量有降低酒样中杂醇油含量的趋势。

The results show that:(1) The penetration resistance of functionally graded layered armour made of metal Matrix Composites is better than that of the Aluminum plate;(2) The penetration resistance of the functionally graded layered armour whichlay_up is 0%/57%/0%/26%/0%/12%/0% is the best;(3) The resistance penetration of the the functionally graded layered armour can be greately promoted through optimizing the lay_up and volume fraction of the reinforced particle;(4) The functionally graded armour in which the particles distribute continuous has better behavior of resistance penetration when the volume fraction of the reinforcements are constant;(5) The higher volume fraction of the reinforcements at the surface of FGM and the more non-homogeneous the reinforcements distribution, the higher thesurface Youngs Modulus and the flow stress are;(6) The behavior of penetration resistance of the functionally graded armour in which the particles distribute continuously is better than that of homogeneous steel plate;(7) The functionally graded armour provedes a important approach for the optimization and design of the resistance penetration;(8) The numerical results of simulation of the bird striking the aircraft structureshow that the finite element model of the balance leg is effective;(9) The numerical results show that the structure internal force is relative largewhen the bird strikes the top of the balance leg;(10) The process of the birdstrike is thaf.after the bird penetrting through the front skin of the balance leg and striking the front beam,the bird is broken up in three parts.

经过本文所进行的数值模拟后我们发现：(1)在层状梯度装甲板的抗侵彻过程中层状功能梯度板比铝板的抗侵彻性能好；(2)在层状梯度装甲板的抗侵彻过程中铺层顺序为0%/57%/0%/26%/0%/12%/0%的功能梯度装甲板的抗侵彻性能最好；(3)通过优化组合层状梯度板的铺层顺序以及增强颗粒的含量可以大大改善梯度板的抗侵彻性能；(4)当SiC颗粒体积含量一定时，增强颗粒连续分布的功能梯度板表现出了优越的抗侵彻性能；(5)增强颗粒连续分布的功能梯度板表面SiC颗粒体积含量越高，分布越不均匀，表面的弹性模量就越高，屈服应力就越高；畜此工业大学硕士研究生学位论丈(6)增强颗粒连续分布的功能梯度装甲板比匀质钢板表现出良好的抗侵彻性能；(7)功能梯度装甲板为整个抗侵彻性的优化设计提供了重要的途径。

Through comprehensive comparison,during the growth from 1 age-degree bamboo to 2 age-degree bamboo,density, mechanical strength(except maximum tensile strength etc.),fraction of bundle sheath,cell wall ratio,crystallinity,cellulose content and lignin content increase rate are the greatest.3age-degree bamboo has higher strength,strength and gravity ratio andcrystallinity are the biggest,fraction of parenchyma is small and insect-resistant.2 degree bamboo has the greatest mechanical strength,but its strength andgravity ratio is not the highest and its crystallinity is lower than 3 age-degreebamboo due to its greatest fraction of parenchyma,loss tangent value is thebiggest.Its creep character is not good and is easily eaten by moth.

通过综合比较，竹材从1度竹到2度竹生长过程中，密度、力学强度、纤维束比量、胞壁率、结晶度、纤维素含量、木质素含量等指标增加幅度是最大的。3度竹强度较高，强重比、结晶度最高，薄壁组织含量较小，相对抗虫蛀，材质最好，适合材用。4度竹结晶度下降引起强度的下降，但薄壁组织组织比量最小，相对最抗虫蛀。2度竹力学强度最大，但是强重比并不是最大，结晶度比3度竹低，由于薄壁组织组织比量最大，内耗值最大，蠕变性能较差，同时相对易遭虫蛀。

The invention relates to a continuous method for the intermediate separation of the oxirane produced by the reaction of a hydroperoxide with an organic compound, characterised in that the product mixture generated during the synthesis is separated in a partition-wall column into a low-, middle and high-boiling fraction and the oxirane is taken off with the middle-boiling fraction at the side tap point of the column and the hydroperoxide is taken off with the high-boiling fraction from the bottom of the column.

一种对在环氧烷合成中通过氢过氧化物与有机化合物反应形成的环氧烷进行中间分离的连续方法，其中在隔离壁塔中将该合成中形成的产物混合物分馏得到低沸点馏分、中间沸点馏分和高沸点馏分，并在侧线采出处从中间沸点馏分中取出所述环氧烷，在该塔的底部从高沸点馏分中取出所述氢过氧化物。

The results showed that Cd and Zn mainly occurred in the fractions extracted by BCR method, namely, weak soluble fraction, reducible fraction and oxidisable fraction, which were 35.0%, 49.7 and 12.9% for Cd, 17.6%, 16.6% and 21.4% for Zn, respectively, in surface sediment.

结果表明，表层沉积物中的Cd和Zn主要以可提取态（即弱酸溶解态、可还原态和可氧化态）存在，其中，Cd在弱酸溶解态、可还原态和可氧化态中的含量分别为35.0%、49.7%和12.9%；Zn在三者中的含量也分别达到了17.6%、16.6%和21.4%。

By taking the effects of Ge fraction and strain on the energy band structure and effective masses into account, the analytical model of the effective densities of states of the conduction and valence bands are proposed, and the temperature and Ge fraction dependence of the effective densities of states are also studied. Following this, the temperature and Ge fraction dependence of intrinsic carrier concentration in strained SiGe layers are analytically calculated. Furthermore, carder freezeout effect and the minority carrier trapping effect of the shallow-level compensated imputities in strained SiGe layers at low temperatures are investigated.

其中，分析了应变SiGe层的临界厚度、能带结构、禁带宽度及禁带变窄模型；在考虑了Ge组份和应力对应变SiGe层能带结构的影响后，给出了较为精确的SiGe应变层的导带和价带有效状态密度的模型，并研究了有效状态密度与Ge组份及温度的变化关系；分析了应变SiGe层的本征载流子浓度及重掺杂下的禁带变窄；讨论了低温下应变SiGe层中的载流子冻析效应，并计算了SiGe应变层的电离杂质浓度与Ge组份及温度的关系；研究了应变SiGe层低温浅能级补偿杂质的陷阱效应；给出了应变SiGe层多数和少数载流子迁移率以及少数载流子寿命模型。

The compositions of ethyl acetate fraction, normal butyl alcohol fraction, and water fraction differed significantly.

通过GC-MS和HPLC分析，黑米抗氧化提取物的石油醚部和氯仿部成分以脂肪酸为主，乙酸乙酯部、正丁醇部和水部之间成分构成差异较大。

Methods The stratified random sampling rule and the standard grading system of blindness set by WHO were adopted in the study, and 11 327 subjects were enrolled (a sampling fraction of 2.01%) in the whole county.

采用分层随机抽样原则，以世界卫生组织盲目分级为标准，对全县按2.01%抽样比例抽取11327例进行盲和低视力的流行病学调查。

After the symbol-class accumulation average of every sampling point in all period of time, one time or above symbol-class accumulation average are set on every sampling point in every period of time in multi path searching window, and the result of calculation of all sampling points is stored.

完成所有时段中每个采样点的符号级累加平均运算后，对多径搜索窗口内每个采样点在时间轴上做一次或一次以上的符号级累加平均，并存储所有采样点的计算结果。

Chimborazo and Cotopaxi, took me by the hand.

越过琴博腊索山和科托帕克西山。

This car is in a good condition.

这辆车的状况很好。