查询词典 systematic sampling

The position and size of the monochromator, focusing curvature radii and tilting angles of the germanium focusing monochromator under different different take-off angle, size and divergency of the second collimator and intensity loss due to the use of it were determined. The neutron flux at different wavelength, under different reflection and take-off angle of the monochromator and divergency of the first collimator, were given. The simulation on the aperture used for limiting beam size in front of the sample showed that, smaller the size of the aperture and further the distance from the aperture to the sample, greater the loss of the intensity and more serious the spread of the beam along vertical direction at the sample position which makes the practical sampling volume greater than expected.

用蒙特卡罗模拟方法对中子应力衍射谱仪的设计方案进行了优化研究，提出了一系列可供参考的数据：确定了单色器的位置、尺寸、垂直聚焦单色器在不同起飞角下的聚焦曲率半径和倾角；讨论了第二准直器的尺寸和发散，以及使用第二准直器造成的强度损失；给出了在不同单色器反射面、起飞角、中子波长和第一准直器发散度的情况下样品处的中子注量率，以及多种组合情况下谱仪的分辨率曲线；对限束方孔的尺寸、距离样品远近对强度损失和测量中的影响做了深入研究。

Is it fetch every analysis, sampling well test materials is it log well curve to combine to utilize secondly, confirm and flow the quantity of division and sign of the unit.

其次利用取心井的各项分析化验资料结合测井曲线，确定流动单元的划分数量和标志。

CCD works in field readout mode which can be realized as binning-technology in vertical direction and the noises of video signal are filtered by Correlated Double Sampling, the signal-to-noise ratio of system was enhanced.

采用相关双采样技术滤除了视频信号中的相关噪声，提高了系统的信噪比。

The double speed synchronous sampling method is introduced to harmonic analysis,and the corresponding algorithm model is deduced.

给出了双速率同步采样法用于谐波分析的算法模型，仿真结果表明，与普通同步采样算法相比，本方法具有更高的精度。

Now, we are available for KQP-B serial air cannon, ST-A serial dredging machine, KSD serial sampling facility and other new products with patents.

公司根据市场的发展和需求不断研制和开发新产品，2004年开始已研制生产料仓清堵器。

Puyang Kaishide mechanical facility corporation limited is one of the most professional manufacturers of air cannon, dredging machine, sampling facility and roller in north of Henan province.

公司简介 Company Profile 濮阳凯世德机械设备有限公司是豫北地区制造清堵器、疏通机、采制样设备及托辊最专业的制造商之一，是国内最早研制开发此类产品的厂家之一。

The bigger top tension will cause the wellhead to be over-pulled and increase the probability of wellhead collapse. As the mean drifting of drilling vessel or platform increases, the wellhead displacement and bending moment nearly linear enlarges. The greater current velocity may result in wellhead instability because of its limited bearing moment capacity. Therefore the drifting control is very important to subsea wellhead stability. The wellhead stability may be improved by taking measures such as enhancing the conductor bending strength, controlling scour depth on seabed, getting geological data sampling of shallow formations.

算例分析表明，水下井口的横向偏移及弯矩随张力比和海流流速的增加而大幅增大，顶张力过大会引起井口稳定性变差；随着钻井船或平台漂移量的增加，井口的横向偏移和弯矩近似线性增加，控制好钻井船或平台的漂移非常重要；由于井口承受弯矩的能力有限，较大海流流速情况下可能造成井口失稳；提高导管抗弯强度、控制泥线处管柱冲刷、获取浅部地层的取样数据等措施可以增强井口稳定性。

In this article, the author analyzed arsenic and selenium for drinking water at Xi'an peripheral locality 11 sampling point and found that the arsenic content in drinking water is lower in south and east of Xi'an. In Hu county area west of Xi'an arsenic content in drin king water is higher than other areas obviously and has achieved 0.047mg/L, approaching the mild pollution standard.

摘 要：通过对西安周边地区11个采样点饮用水中砷含量的调查分析，结果表明西安南部秦岭地区和西安东部的饮用水中砷含量较低，西安西部户县地区砷的含量明显高于其他地区，达到了0.047 mg/L，已基本上接近了轻度污染的标准。

From the aspects of economy,use,precision and so on,introduces the characteristics and foot s function of dual time -base NE556 integrated circuit,and applies it on the capacitance sampling measunement circuit.

从经济、使用、精确等角度出发，介绍了双时基 NE 556集成电路的特点与引脚功能，并在电容采测电路中进行了应用。

Methods A survey was conducted in the female college students in Wuhan area by employing the duster sampling technique.

方法在武汉地区，采用整群抽样方法，对医学专业女大学生进行了抽样调查。

When this condition occurs, inbound replication with the source partner is stopped on the destination domain controller and event ID 2042 is logged in the Directory Services event log.

计算机密码学是研究计算机信息加密、解密及其变换的科学，是数学和计算机的交义学科，也是一门新兴的学科。

Instructions: click on the thumbnails to see a larger image, then use the left-right arrow keys to scroll through the slideshow.

使用说明：滑鼠点在小图上即可放大观赏。开启后键盘左右键可用来换照片。