查询词典 systematic sampling

Maxillary sinus puncture was performed on these patients both for sampling of sinus contents and irrigation of the diseased sinuses. Aspirate contents of the sinuses were collected for aerobic and anaerobic cultivation. 3 A prospective study of pediatric patients with community-acquired rhinosinusitis was conducted. Bacterial culture was performed on the specimens obtained from maxillary sinus by puncture and middle meatus by endoscopic sampling. The correlation and diagnostic usefulness of endoscopic middle meatal culture versus maxillary sinus puncture were determined.

我们搜集鼻咽癌放射线治疗后患有急性上颔窦炎的病人，以上颔窦穿刺搜集这些病患的鼻窦分泌物并冲洗其患病的鼻窦，收集到的鼻窦分泌物则送往实验室做细菌培养。3 我们执行前瞻性研究，收集患有社区感染鼻及鼻窦炎的儿童，这些病童会同时接受内视镜中鼻道培养与上颌窦穿刺培养，为了厘清儿童使用内视镜中鼻道培养的可信度，我们计算内视镜中鼻道培养与上颌窦穿刺培养结果的关联性与诊断测试。

If the operation at the open access port is unavoidable, use sampling beakers and sampling gauges made of nonconductive material.

如果运行在开放的港口是不可避免的，用烧杯取样，并采集了仪表的非导电材料。

At last, the proposed algorithm is simulated under such conditions as sinusoidal voltage, nonsinusoidal voltage, frequency fluctuation, sampling frequency and sampling time length in change.

最后分别在电压无畸变、电压含谐波、电压频率波动、采样频率以及采样时间长度变化时，对文中提出的介损测量正交分解法进行仿真验证，并与谐波分析法进行比较分析。

Random sampling is simply a method of selecting item s for inclusion in a sample; it can be used in conjunction with either stati stical or nonstatistical sampling.

随机采样仅仅是选取样本项目的一种方法，它既可以用于统计抽样，也可以用于非统计抽样。

Comparison of statistical and nonstatistical sampling A sample is said to be nonstatistical when the auditors es timate sampling risk by using professional judgment rather than by using sta tistical techniques.

统计抽样与非统计抽样的比较当审计师凭借职业判断而不是运用统计技术来估计抽样风险时，这种抽样就称为非统计抽样。

In July 2006, the diurnal activity rhythms of 13 heads of captive Qinling golden takin were observed in Shaanxi Provincial Centre for the Breeding and Conservation of Rare Wildlife at daylight (from 9:00 am to 4:00 pm in July). The behavioral ethnogram was identified through observation at the sampling site, with the behaviors of golden takin recorded at 5 min interval using instantaneous scannable sampling method.

2006年7月，在陕西省珍稀野生动物抢救饲养研究中心内采用瞬时扫描取样和全事件抽样法对13头圈养秦岭羚牛的昼间(自早09：00至下午04：00)活动规律进行了观察。

By sampling echo signal demodulated and A/D transform, sampling value is transmitted to SCM for compare, division, calculation, and exporting gain code to control signal range; furthermore controlling the AGC circuit, realizing amplification control to echo signal, consequently stabilitate the signal range in a window for the later circuit.

通过对检波后的回波信号进行采样，经过A/D变换，采样值送入单片机内部进行比较、判别、计算，然后输出可控制信号幅度的增益码去控制AGC电路的受控级，实现对回波信号的增益控制，从而使得输出信号幅值稳定在一个窗口内，供后续电路处理。

According to the characteristics of the wayside frequency-shift signal spectrum,and based on a great number of computer emulators and real-time experiments and on non-complete periods sampling,the feasibility of applying the under-sampling technology to the real-time FFT analytical method of tramroad FSK signal is validated.

针对轨道移频信号的频谱特点，采用欠采样技术对轨道移频信号进行非整周期的采样，经过计算机仿真实验，验证了基于非整周期采样方法对轨道移频信号进行实时傅里叶变换分析检测的可行性，证明采样方法满足检测指标的要求。

And, of course, all the alternatives of biareal plot sampling are possible for triareal plot sampling .

当然，两种面积样地抽样的所有可选方案对三种面积样地的抽样都适用。

The wavelet time-frequency properties of the uncracked rotor and the cracked rotor were discussed by the continuous wavelet time-frequency analysis algorithm. A new algorithm using the wavelet time-frequency analysis algorithm to detect the crack was proposed. The influence of the sampling frequency on the wavelet time-frequency analysis algorithm was analyzed through the numerical simulation research; the valid sampling frequency was presented.

利用连续小波时频分析方法，讨论了裂纹转子与无裂纹转子的小波时频特性，提出了利用小波时频分析方法识别裂纹的新方法；数值仿真研究了采样频率对小波时频分析方法的准确性和有效性的影响，并给出了建议性的采样频率。

"The operators will suffer a temporary decrease in the number of consumers and short message services as people may not like having to provide their ID cards for a phone number," Xu Junqi, vice-dean with the Policy-Making Institute of the Telecommunications Research Centre under MII, said yesterday.

信息产业部下属的通信决策研究院副主任徐俊其昨天说：&实行手机实名制后，人们可能不太情愿用身份证注册手机号，所以通信运营商会暂时面临用户减少和短信用户减少的问题。&

I don't believe in make-believe!

我不相信这些虚构的故事。