查询词典 sampling

With only mild constraints placed on sampling locations, the inverse transform can be realized without matrix inverse in case of nonuniform frequency sampling, which is very useful in devising fast-running FIR filters.

在不一致频率采样时，只要对采样点略加一些约束条件，就可以不经矩阵求逆实现反变换，这对设计快速连续的FIR滤波器非常有用。

It will develop the in-situ X radiation sampling technique by exploration of in-situ X radiation sampling technique.

本文在X荧光现场技术方面的探索，将促进X荧光现场分析技术的进一步发展。

Licheniformis in bioslurry reactor were monitored by FISH on different sampling days, anti the changes of oil concentration in bioslurry were measured on the same sampling days. The two test results represented good consistency with the trend of petroleum biodegradation, suggesting the feasibility of using FISH technique for monitoring the changes of microorganisms in oil-containing sludge.

运用上述FISH技术监测生物泥浆反应器中地衣芽孢杆菌量的变化，并与泥浆中含油率的变化进行比较，二者的变化情况符合微生物降解石油的趋势，为监测含油污泥中微生物的变化提供了一种可行的技术。

Relying on both dynamic and static analysis methods,both microstructure and macrostructure analysis methods,both on-line and off-line analysis methods,as well as both along-line sampling and die sampling techniques,the author of this thesis studied and developed an on-line microscopic system,the on-line rheometers and the on-line samplers which are used in single screw extruding process for the first time. Based on the analyses of a plenty of experimental results, the thesis mainly discussed following several questions: solid-bed break-up phenomenon on macroscopic scale,melting and deforming mechanism of a solid particle on small particle scale,and polymer morphology on microscopic scale.

本文作者通过把动态和静态分析相结合、微观和宏观分析相结合、在线和非在线分析相结合、沿程取样和机头出口样品分析相结合的方法，在单螺杆挤出过程的在线显微观察与摄影、在线流变测试、在线取样的大量实验分析的基础上，针对挤出过程中从宏观尺度范围的固体床破碎现象、到较小的颗粒尺度范围的固体粒子的熔融与变形、以至微观尺度范围的聚合物材料的形态结构的变化情况等有关几个的问题进行研究讨论。

Studies on relationship between population size and sampling proportion revealed that population size had evident impact on the sampling proportion and retainment of variations in core collection.

以36对SSR引物的37个位点和2708份核心种质材料进行取样比例的研究结果认为，随着压缩比例的增大压缩群体的基因多样性指数先升高再降低，等位基因的数量和等位基因覆盖率持续下降并且速率逐渐加大。

This board has proper strategy to get the data for power quality analysis, because it uses two chip, six channel analog-to-digital converter and phase locking synchronous technology, which make it able to collect three phase electric voltage and electric current signals in timing sampling and equal-time cycle sampling ways.

并采用了两片六通道高速A/D转换器和运用了锁相同步技术，对三相电压和电流信号能进行定时采样和等间隔采样，这样得到的数据对于下一步电能质量指标进行分析更为合理。

Even when the results under the two sampling systems were similar,typical mode sam- pling saved substantially cost and labor(by 2/5)and time(by 17/20)over random sampling.

即使两种抽样方法结果相近似，但典型众数抽样在布点、经费、人力及时间等方面比随机抽样为少，仅及随机抽样的3/5与3/20。

The system,mainly controlled by the minimum system which consists of the single-chip microcomputer and FPGA,is designed based on the basic principles of digital oscilloscope,which achieves the function of the measured signal's sampling,storages and playbacks of the ordinary oscilloscope,adds the equivalent sampling and sample-and-hold function,which greatly improves the measurement range of the system.

基于数字示波器的基本原理，以单片机和FPGA组成的最小系统为控制核心，实现了普通示波器对被测信号的采样、存储与回放，并且增加了等效采样和采样保持功能，极大地提高了系统的测量范围。

Methods: Cluster sampling was used in randomly selected individuals (aged ≥ 50 years) in the southern rural area of Heilongjiang. After the pre-experiment uniform standard was completed, 5058 individuals (91%) were received visual acuity test and eye examination. Two consistency tests were successively performed in the two of sampling units during the survey in order to guarantee the quality.

采用整群随机抽样方法将黑龙江省南部农村人口按一定的标准划分成抽样单位，两组人员通过预实验统一标准后对年龄≥50岁共5058人（受检率91%）进行视力和眼部检查，先后在其中的两个抽样单位进行一致性检验。

To solve the exsisting problems in the realization of the LFM/CW radar, the thesis presents a technique for dynamically measuring the LFM/CW signals, which can accomplish the dynamic measurements of FM linearity, FM bandwidth and FM slop of the transmitted signals of LFM/CW radars. This technique creates an effective and accurate means of judging the performance of LFMCW radars. The linearity-correction techniques presented in the thesis successfully make the linearity of the transmitted signals of an actual LFM/CW radar reduce from approximately 25% to 0. 1%(or r. m. s linearity of 0.04%), better than the best results (0.22%) obtained by foreign researchers with complex linearization closed-loop in the same kind of LFM/CW radars, according to the published literatures during the last decade. In order to improve the capability of the real-time processing and range-cells management of LFM/CW radars, the principle of equivalent mixing by lacking-sampling process of band-pass real signals is proposed based on the well-proved improvedversion of sampling theorem of band-pass real signals. This principle is used to configure the range-segments processing of the beat signals of an actual LFM/CW radar. The techniques of system-background interference suppression and the beat signal's dynamic range suppression are proposed, and are realized in an actual LFM/CW radar to demonstrate their effectiveness.

针对线性调频连续波雷达实现中急待解决的技术问题，文中提出并验证了线性调频连续波信号的综合动态测试技术，可以完成对线性调频连续波雷达发射信号的扫频线性度、扫频带宽和扫频斜率的综合动态测试，为衡量实际线性调频连续波雷达的系统性能创立了精确有效的测试手段；文中建立的非实时闭环动态校正技术使一部实际的线性调频连续波雷达的发射信号（时带积3×10〓）的扫频线性度从25%改善为0.1%（方均根线性度0.04%），优于国外已公布的80年代同类雷达中采用复杂的实时闭环动态校正环路所获得的实际结果（0.22%）；为了改善线性调频连续波雷达的实时性和分辨单元数处理能力，文中发展完善了实带通信号的采样定理并给予了严格证明，并在此基础上提出了欠采样等效混频原理，将其应用于实际线性调频连续波雷达的距离分段处理中；针对线性调频连续波雷达中系统背景干扰和回波动态范围问题，创立了系统背景综合抑制技术和频域动态范围压缩技术，并将它应用于实孔线性调频连续波雷达系统中，显示出它们的有效性。

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。