查询词典 systematic sampling

The results showed that the aluminum plates had a much better effect than zinc plates in identifying crystalline free silica. The all open-faced samples had good uniformity in the filter no matter how many middles were used, but not so good for the closed-faced sampling. The calibration curve had a good correlation coefficient (r=0.995). Due to different industrial operating patterns, the distribution of crystalline free silica concentration varied by the industrial environment. The dust consisted of 10- 30% of crystalline free silica in all samples obtained from the foundry environments. The crystalline free silica was accounted for less than 10% in the respirable dusts.

结果显示，因为铝板对於结晶型游离二氧化矽具有较良好的补正系数，因此做为本研究的基底标准吸收校正的校正元素；SKC铝制旋风分离器搭配开匣式滤纸匣於一阶中环、二阶中环、三阶中环均有良好之均匀度，反之，搭配闭匣式滤纸匣其均匀度均不佳；分析检量线具有良好线性关系(r=0.995)，因作业型态不同，作业环境会有不同的浓度分布，综观作业环境中可呼吸性结晶型游离二氧化矽之含量均小於10%以下，总粉尘结晶型游离二氧化矽之含量约为10 – 30%之中。

According to the change of sampling pressures, the one of two operation ways is selected, which solve the contradiction between power consumption and accuracy and real-time of data; The wireless transmit adopting CRC check-up way improve the anti-interference ability of data transmission further; Mistake operation are effectively reduced by software design of system configuration by keys.

根据采样压力值的变化，进行两种运行模式的选择，解决了耗电量与数据实时准确的矛盾；无线传输采用了CRC校验的方式，进一步提高数据传输的抗干扰能力；系统设置按键输入的软件设计有效地较少了人为误操作。

The Correlated Double Sampling technique is applied to eliminate the 1/f noise and the offset of an operational amplifier.

采用相关双采样技术消除了1/f噪声和运算放大器失调电压的影响。

The sampling method is operationally used in the crop monitoring system for the Ministry of Agriculture.

设计了满足生产应用的全国作物面积遥感监测抽样运行方法。

The implementation steps are that the seismic data is collected; the Fourier transform is made for the seismic data at a certain time window; a low pass filter operator of the time domain with an interception frequency of FE and a sampling rate of DT is calculated, which is taken as the equivalent N point smooth operator; FE and DT satisfy the equation that FE*DT is equal to X*DF*1.024; the estimate value of the amplitude spectrum of the seismic wavelet and the reverse wavelet are obtained, which are convoluted with the original seismic data; and the deconvolution seismic data of the time window is obtained.

实施步骤是采集地震数据，对某一时窗的地震数据做傅立叶变换，计算截止频率为FE和采样率为DT的时间域低通滤波算子作为等效N点平滑算子，FE与DT满足FE*DT＝X*DF*1.024，进而得到地震子波振幅谱估计值和反子波，再与原始地震数据褶积，得到该时窗的反褶积后地震数据。

If this is not possible, sampling should be done at a Delphi agreed upon frequency and monitored for variation over time/operator/set up.

如果这不可能完成的话，制样应当在Delphi对时间/操作员/建立的变更监控及其频率达成一致的基础上完成。

Oppenheim, in which I was almost enraptured by analysis of Charles Fourie, Laplace Transform, Filter and sampling analysis of signals.

信号与系统是我最喜欢的一门课，神奇的傅立叶，拉氏变换，滤波器以及各种信号的采样分析让我痴狂，课余我把ALAN V。

"" Optical resolution refers to the scanner's optical system can be the actual sampling.

"平教不合辨率"是指扫描仪的平教编制可以采样的本质陈闻度。

Adopting peak detection, AGC based on receiving duty cycle and multi-phase synchronization, the method can be an optional scheme for lowering sampling rate and system realization cost.engineering methods of IR-UWB wireless systems which focus on the RF front-end of the transceiver are studied by theoretical analysis and experimental verification.

文中还给出了综合这些方法时在室内多径信号下接收性能的仿真结果，仿真表明这种方法在室内环境下可以可靠工作在数兆到数十兆的传输速率上。

Landuse of these sampling sites can be identified as farmland, vegetable land, orchard, grass land and forest.

按土地利用类型，采样点可分为农田、菜地、果园、林地、草地。

Objective:To compare the response control and attention of Schizophrenic patients with that of the healthy controls by Integrated Visual and Auditorycontinuous performance test. To quantitate the impairment of cognitive function in patients, and to explore the relationship between cognitive function and the severity of the disorder.

目的：探讨精神分裂症病人在IVA持续操作测试中的反应控制能力、注意力等，并与健康人进行比较，从而量化精神分裂症病人的认知功能损害，并进一步探讨其认知功能与疾病严重程度的关系。

Main effective factors including subcooling degree, mechanical vibration, gas hydrate reformation, environment temperature, noncondensing gas and surfactant are analyzed.

指出过冷度、机械振动、重复生成水合物、环境温度、不凝性气体、添加剂是影响气体水合物生成的主要因素，还对R152a水合物的放冷进行了实验研究。