查询词典 sampling

Excellent product quality, so I plant products: in 1999 in Tianjin sampling of qualified products, and City fluorescent screen publicly announced; for many years been of Quality Supervision, Shunde City Council regularly sampling pass products; for many years by the Guangdong Provincial Bureau of Quality Supervision, periodic sampling passes products; the first through the National Compulsory Product Certification.

过硬的产品质量，使我厂产品成为：1999年天津地区抽检合格产品，并于城区荧光屏幕上公开宣布；多年获顺德市质量监督局定期抽检及格产品；多年获广东省质量监督局定期抽检及格产品；首批通过国家强制性产品认证。

Based on the precision and the cost of the relationship between the use of conditional extremum for the function of several variables method to determine when the first sample for sampling with probability proportion to size,the second-simple random sampling,the two-stage sampling is optimal allocation.

本文根据精度与费用之间的关系，利用求多元函数条件极值的方法，确定当第一级抽样为有放回PPS抽样，第二级抽样为简单随机抽样时，二阶抽样的样本容量最优分配。

Aiming at the high-speed matching controlling problems between adaptive filters inplemented by FPGA and the high-speed AD converters, a high-speed sampling and adaptive filtering system was designedusing asynchronous FIFO. The dual channels AD converter AD9238-40 was used as input stage, two asynchronous FIFOs on-chip were used as high-speed buffer memory, and the sampling and adaptive filtering was controlled by FPGA. The asynchronous FIFO was customized and simulated on Quartus II, the sampling and adaptive filtering controller was designed and also simulated on Quartus II. The high-speed matching controlling of the dual channels AD converter AD9238-40 and the adaptive filter was implemented.

针对用FPGA实现的高速自适应滤波器与高速ADC数据处理速度不匹配、容易产生串扰等问题，提出了一种基于异步FIFO技术的高速采样自适应滤波系统方案，选用双通道高速AD9238-40作为前置输入级，用片内异步FIFO作高速缓存，用FPGA控制采样与滤波，给出了系统的结构框图，对异步FIFO与采样滤波控制器进行了仿真，并将异步FIFO与采样滤波控制器集成在同一FPGA上，完成了对双通道高速AD9238与自适应滤波器的高速匹配控制。

According to the division principle of flue gas sampling point in round stack,the paper gives a convenient and prac-tical formula of the dixtance from sampling point to inwall and corrects the errors in table of the distance value from sampling point to in wall in the published literatures.

本文根据圆形烟道采样点划分原则，给出了一种方便适用的采样点距烟道内壁的距离公式，并就现有文献中采样点距烟道内壁的距离值表格的误差进行了修正。

The main research and application result is: five dynamic sampling frames with spatial autocorrelation analysis are achieved such as high-high, low-low, high-low, low-high and not significant, and finally the result of per capita agricultural total output value of Beijing with spatial stratified sampling technique is 35.80 thousand Yuan RMB, with the sampling error range is ±3.861 thousand Yuan RMB.

其结果为：动态生成"高－高集聚"、"低－低集聚"、"高－低集聚"、"低－高集聚"和"分布不明显"5个抽样框，并最终通过空间分层抽样流程得到北京市人均农业总产值的抽样调查结果为3.580万元，抽样误差的允许范围为±0.3861万元。

The relationship between the sample mass and the number of particles were investigated for different sampling modes (sampling by mass and sampling by the number of particles).

按质量取样的误差理论的提出，解决了长期以来人们在考虑按质量取样的误差时所必须进行的近似处理的局限性，填补了该领域的一项空白。

The sampling of complicated materials were investigated. The relationship between the composite sampling variance and the number of increments was studied. The quantitative equation for estimating the composite sampling errors directly from the physical and chemical parameters of the population with multinomial distribution theory was presented. Monte Carlo simulation technique was employed to verify the above theories.

对于复杂物质的取样，研究了分层性物质的组合取样误差与份样数目之间的关系；采用多项分布理论，提出了组合取样误差公式，建立了组合取样误差与被研究总体的理化参数(如组分含量、质量分数等)之间的定量关系，通过Monte Carlo模拟技术对此进行了验证。

This paper analysized the relationship between sampling frequency fs and the taps N of low pass filter in A/D transform and got a formula expression, which can give reference to the parameter design of quadrature sampling.; aiming at the wave distortion in traditional arithmetic of quadrature sampling with pulse compression, an improved algorithm has been studied and validated in Matlab and get perfecter result. In order to enlarge the detect distance of Radar, a method of part pulse compression is put forward, the realistic sense and the implement scheme is analysized.

本文分析了在正交插值前端A/D变换中采样率的选择与正交插值低通滤波器的阶数的关系，得到公式化的表达式，可为正交采样参数设计提供参考；针对传统的正交插值及脉冲压缩算法中的波形畸变提出了改进方案，并通过仿真实验得到较好的效果；为扩大雷达的探测距离，提出部分脉压的方案，详细分析了其理论意义及实现方法。

Unequal probability sampling is a very effective method for sampling applications,which is a sampling scheme with unequal probability .

不等概率抽样是赋予总体每个单元不完全相等入样概率的抽样，是实际中十分有效的抽样方法之一。

We can get around this problem unknown sampling error to a large extent if we use probability sampling, since we can get estimates of the sampling error from the sample itself.

偶们可以处理这个难题未知的抽样误差在非常大程度上假如我们用概率抽样，因为我们可以从样品本身的抽样误差估计。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。