查询词典 sampling ratio

The DVCAM format uses 8-bit digital component recording with a 5:1 compression ratio and a sampling rate of 4:1:1 / 4:2:0.

DVCAM格式采用8 -bit比特数位分量记录，压缩比为5：1，采样频率为4：1：1(for 525/60 NTSC) 4：2：0(for 625/50 PAL)。

Due to spatial variability in the RAP- base ratio and the amount of cement actually applied to the recycled layer, sampling of the field- TRB 2005 Annual Meeting CD-ROM Paper revised from original submittal.

由于空间变异在说唱-基地的比例和数额的水泥实际应用到再生层，取样的场全面理财总值在2005年年度会议的光碟文件的修订，从原来递交。

From January 2007 to December 2007, the samples of this study were the patients who were under 15 years old in alleviated period by purposive sampling. They were divided into two groups:(1) 96 patients participated in the Chinese and western medicine care group;(2) 64 patients participated in the western medicine care group. The SF-36 health questionnaire for pre- and post-tests were administered to all participants. The cost took account of national health insurance apply claims and ratio of hospital's cost and fee.

收案期间为2007年1月1日至12月31日，样本来源分别为中医优质门诊照护计划合作之医疗院所及西医小儿过敏科门诊，采立意取样的方式，年龄为15岁以下由医师确诊为小儿气喘患童，比较其不同治疗模式：接受中西医联合照护组与只接受西医治疗组，在治疗前后测量其生活品质的改变情形，并收集各组健保申报费用及医院成本费用比率资料，最后进行两组成本效果分析比较。

In duty ratio control technique,a zero voltage vector is applied in each sampling period to reduce the torque ripple.

与矢量控制相比，直接转矩控制在静止的定子坐标系中进行计算，省去了复杂的坐标变换和电流调节

A phase-locked amplifier is used to improve the signal-to-noise ratio of photoelectricity signal, and a computer is utilized to incept the sampling sig...

用锁相放大器来提高光电信号的信噪比，信号被快速采样后由接口电路输入计算机，自动给出所测单模光纤的模场半径。

Because how to improve the measurement accuracy of CT parameters is the key of low voltage method, the paper in detail introduces the electronic parameters measurement circuit, furthermore,the needed digital sinal source ,CT ratio measurement circuit ,the way of digital sampling ang sinal processing are emphasized in the paper.

文中详细介绍了CT 内部参数的测量原理及实现方法。在其中着重讨论了校验仪中所需的高精度测试信号源及变比测量电路的原理和实现、数字采样技术及数据的分析处理方法。

On the basis of the statistical characterestics of satellite meteorological infrared cloud charts this paper presents a coding algorithm of "Sub sampling+Modified JPEG+Image enlarging",realizing a compression ratio of 50∶1～100∶1, with the PSNR of 35～40dB and visually unperceptible distortion.

依据GMS卫星红外气象云图的统计特性，提出了一种&亚抽样＋修改的JPEG＋图象放大&的静止图象编码方法，使有失真压缩比在50∶1至100∶1时，恢复图象峰值信噪比在35dB～40dB之间，主观质量无视觉可觉察到的失真。

Through field observations and sampling, by referencing to other documents and information, with correlation analysis and principal component analysis as mathematical tools, we know that: the distribution of the number of birds has close relations with density of zoobenthos and ratio of water area, the correlation coefficient of the distribution and the two factors are 0.916 and 0.745, the density of zoobenthos is the most direct reflection; Vegetation types , the coverage and water level may have relations with the distribution of the kind of birds, normally, middle and large volume birds need high vegetation and high coverage as their habitats, and waterfowl like deep water as their habitats; Human activities have low impact on the the distribution of the number of birds, but the activities have relations with all the other environmental factors.

通过实地的观测、采样，并结合其他文献的资料，以相关分析和主成分分析作为数学工具，得知：鸟类的数量分布和底栖生物密度、水域面积比例有着密切关系，鸟类数量分布与两者的相关系数分别为0.916和0.745，其中，底栖生物密度是鸟类数量分布的最直接反映；植被类型、植被盖度和水位可能与鸟类的种类分布有一定关系，通常体积中、大型的鸟类需要较高的植被高度，来作为自己的栖息场所，水禽需要水位较深的区域作为自己的栖息场所；人为活动对鸟类数量分布的影响不大，但对所有自然环境因子都有一定影响。

A successional Artemisia ordosica and A. frigid community, located on the eastern edge of the Tengri Desert in Alashan Left Banner, Inner Mongolia, was selected as an object for study. Densities of the plants and total nitrogen and available phosphorus in 0~20 cm soil layer were measured of the 400 quadrates (4m×4m) in the sampling plot (80m×80 m) for analysis of relationship between N/P ratio in the soil and plant density thereupon and between the two in spatial heterogeneity.

选择腾格里沙漠东缘内蒙古阿拉善左旗境内的油蒿＋冷蒿群落为研究对象，在80m×80m样地400个4m×4m样方中，调查了油蒿和冷蒿的密度，测定了0~20cm土层中的全氮和有效磷，分析了土壤氮／磷比与植物密度之间及其空间异质性之间的关系。

The water based food simulants,including deionized water,3％ acetate acid solution and 10 ethanol solution,were directly sampled into HPLC,while the refined olive oil needs to be successively extracted by hexane and methanol/acetonitrile mixture (volume ratio=1∶1) prior to sampling.

水基食品模拟物（去离子水、3%乙酸溶液、10%乙醇溶液）中的目标分析物可直接进样，精制橄榄油中的目标分析物依次通过正己烷和甲醇乙腈混合液（体积比1∶1）萃取后进样。

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。