Objective: To introduce the methods for sample size estimation based on width of confidence interval.
目的：介绍基于置信区间宽度的样本含量估计方法。
The frequency spectrum and characteristics of pulse interval and width modulation (PIWM) are derived in detail.
推导了非同步型脉冲间隔与宽度双重调制(P I W M)的频谱及其特点。
Results Prespecified relative width may regulate and control the precision of confidence interval and may reflects magnitude of the sample size.
结果预设的相对宽度可调节和控制可信区间精度并决定样本含量的大小。
Sample size formulae that control the width of confidence interval with a certain confidence level are proposed.
导出在一定置信水平下控制置信区间宽度的样本量公式。
The direction of acoustic beam and angular width of main lobe can be changed by properly amplitude-weighting, decreasing the frequency of impulsive signal and adjusting the interval of array elements.
通过适当的幅度加权、降低激励信号的频率、调整阵元的间距等措施可以改变辐射声束的方向和辐射主瓣的角宽。
By analyzing the law of WEDM processing, this article selects the main factors affecting process: the thickness of the work-piece, pulse width, pulse interval, pulse height, as the input vectors.
本文通过对电火花线切割加工工艺规律的分析，选取影响工艺效果的主要因素：工件厚度、脉冲宽度、脉冲间隔、脉冲高度，作为输入向量。
The effects of pulse width, pulse interval, peak current and process time on intensified layer are analyzed. And the micro-hardness and the property of strengthening layer are also analyzed.
分析了脉冲宽度、脉冲间隔、峰值电流、加工时间对强化层厚度的影响，并对强化层的显微硬度和耐磨性进行了分析。
Article 45. The construction height, face width and landscape control shall meet the following requirements and meanwhile the requirements of sunshine, building interval and fire protection etc.
第四十五条建筑物的高度、面宽及建筑景观控制应符合本章的规定，并同时符合日照、建筑间距、消防等方面的要求。
The parameters such as frequency, width of each pulse and the interval between successive pulses with inverse polarity can be changed easily in program.
这些参数包括输出脉冲的频率、宽度和不同极性的两个脉冲间隙。
The parameters such as frequency, width of each pulse and the interval between successive pulses with inverse polarity can be changed easily in program.
这些参数包括输出脉冲的频率、宽度和不同极性的两个脉冲间隙。
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