查询词典 sampling methods

While for the non-uniform aerosol, a complicated solution to Angstrom coefficients is presented in detail and the Macau data is used to acquire those coefficients in the sampling locations.

对可变气溶胶模型，给出了复杂的求解过程，并针对澳门数据求出了实测点的Angstrom系数。

Aiming at the signal processing problems that exist in online fault diagnosis for train running gear, based on discussing the principle of characteristic spectrum analysis, a method of full period and uniform angle sampling is applied, which transfers the vibration signal from time domain into angular domain. The angular domain signal is transferred into corresponding characteristic spectrum using FFT. Through spectrum estimation and analysis, fault characteristic spectrum values of running gear components are acquired to distinguish their faults.

在讨论特征分析方法原理的基础上，针对机车走行部故障在线监测过程中存在的信号分析与处理问题，运用整周期等角度采样方法将时域振动信号转换为角域信号，采用FFT变换将角域信号变换为对应的特征频谱，通过谱估计、谱图分析得到机车走行部各零部件的故障特征谱值，再根据该特征谱值识别机车走行部各零部件的故障。

The control center unit of this control system is based on a general-purpose microcontroller AT89C52, with LSI peripheral hardware including signal sampling unit for angular and wind speed, control output and power driving unit, keypad-display-alarm unit, and serial communication and printer interfacing unit.

采用通用微控制器AT89C52，设计了控制系统的控制中心，采用大规模集成电路开发了转角、风速信号采集单元、控制输出与功率驱动单元、键盘显示报警单元、串行通讯与打印接口单元等硬件系统。

Antenatal diagnosis by Chorionic villus sampling can be done.

产前诊断由绒毛采样是可以做到的。

The result showed that the best time for sampling was 7 to 14 days after the first bud flowering on the main anthotaxy. The capacity of embryoid production varied significantly in different genotypes. Among them, twelve genotypes yield embryos successfully, which the rate could reach 71%. Genotype 102 was an ideal material for embryoid induction, and the frequency could reach 32.78 embryos per bud. Genotype that with a highest yield produced 546 times as many embryos as that with a lowest yield. The embryoid induction ability of normal bolting genotypes were higher than easy bolting and hard bolting genotypes.

结果表明：在秋冬季日光温室内，供试植株主花序第一朵花开后第7~14天取样，即初花期是最佳取样时期；不同基因型间小孢子胚胎发生能力差异很大，在接种的17个基因型中，有12个诱导出胚，诱导成功率71%；其中102号产胚量最高，达到32.78个／蕾；在已产胚材料中，产胚量最高的基因型是产胚量最低的基因型的546倍；较易抽薹型材料的产胚能力大于易抽薹型和不易抽薹型。

The paper analyzes the principle of anti-aliasing and full period sampling, and then puts forward the implement projects.

论文中对这每个模块的电路设计和程序设计分别进行了论述。

This paper proposes Latin hypercube sampling combined with variance reduction techniques of conditional expectation and antithetic variates to assess ultimate strength reliability of ship hull girder.

本文将拉丁超立方抽样法与条件期望和对偶变数方差减缩技术组合用于分析船体总纵极限强度可靠性。

The effect of the steel sector weight is more apparent in period of an expansion cycle compared to that in a period of a whole economic cycle. The hypothesis was further confirmed during the course of data sampling. Overall, in the various stages of the economic cycles, as the weight of cash deposit decreases, the expected return of portfolio amplify, while the overall risk raises as well.B. The optimal asset allocation strategy, which is subjected to the current rules and regulations, imposed the authority.

若进一步允许风险值趋近於0，适度增加风险以期获取更高报酬，实证显示全循环期与景气扩张期之债券投资部位略降，惟仍达82%以上，其中全循环期之股票类股比重由2.7%增加至9.8%，且由原配置在钢铁类股增加塑胶类股有分散类股之效果；而景气扩张期之股票部位由比重3.4%，经调整VaR值后，比重增加至15.5%，分别配置在钢铁类、金融保险、电子及塑胶等四类股以钢铁类股比重较高。

ABSTRACT This paper presents results of online identification of hydrogenerators, a long-term running robust self-tuning regulator of generator excitation, governor power system stabilizer decoupled in multimachine systems, and an adaptive GPSS designed in frequency domain. 1. It presents a step-by-step zero cancellation method , accuracy weighted recursive least squares and approximate RLS algorithms, inferior limit of sampling time.

针对发电机励磁和调速系统建模与控制，针对多机电力系统的稳定性，本文综述了自适应控制理论及其在电力系统中应用的现状和发展方向后，在辨识、自适应控制结构和鲁棒性提高的措施上进行了研究，取得了水轮机调速系统现场辨识的成功，获得了长期稳定运行的鲁棒励磁自校正控制器、多机解耦的调速侧电力系统稳定器和频域设计的自适应GPSS。

The algorithm is implemented by Fourier transform to obtain the real part and imaginary part of voltage based on digital sampling; and by trigonometric function to gain the sine or cosine dynamically; and then by Taylor series binomial of arc sine function to acquire the actual angle.

通过对数字化采样进行傅立叶变换获得电压的实部和虚部，动态地求取相位角的正弦值或余弦值，然后采用其反函数的泰勒级数二项式得到相位角度。

Pachomius manual labour was organized as an essential part of the monastic life; and since it is a principle of the monks as distinguished from the mendicants, that the body shall be self-supporting, external work of one sort or another has been an inevitable part of the life ever since.

根据圣pachomius体力劳动组织作为一个重要组成部分寺院生活；以来，这是一个原则的和尚，作为有别于乞丐，该机构应自支撑，对外工作的这种或那种已一个必然的一部分，生活至今。

In order to study the effects of parametrical rolling on the ship movement and tilts, in allusion to ship's navigating in regular following waves, the equation of ship rolling motion is transformed into normal Mathieu equation by proper variable replacement when strong parametrical excitation in restoring moment varied according to sine or cosine wave.

为研究参数横摇对船舶运动和倾覆的影响，通过对船在规则波上随浪航行时，恢复力矩中出现的1个以正余弦规律变化的强参数激励项进行适当的变量置换，将船舶的横摇运动方程转换成标准形式的Mathieu方程。