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- Soil sampling error in agricultural environment. 农业环境中土壤取样误差研究。
- Analysis and verification of synchronic sampling error on harmonic detecting of power frequency signal 工频信号谐波检测中同步采样误差的理论分析与验证
- A biopsy could miss such lesions from sampling error, too. 活检会因取材不当而漏诊。
- Synchronous sampling by software is commonly used in digital measurement of periodic electric signals. 软件同步采样是周期电气信号测量中最常用的采样方式。
- Broken slag and synchronous sampling methods bring to simpler structure,less sampling time and higher reliability of it,which is a key to solve a problem. 取样机所采用的破渣与取样同步进行的取样方式使结构大为简化,取样时间减少,可靠性增高,是解决问题的关键。
- In this paper,the double-speed synchronous sampling method is introduce d to the power system harmonic measurement, and the corresponding algorithm mode l of DFT is deduced. 将双速率同步采样法用于电力系统谐波测量,导出相应的DFT计算模型。
- And it has a good effect to use quasisynchronous sampling in the digital measure of common electrical parameter having the same accuracy of the synchronous sampling method. 并将准同步采样算法应用于电工参数数字化测量中,具有良好的效果,与同步采样具有相当的准确度。
- The margin of sampling error for all adults was plus or minus 3 percentage points. 调查结果误差为上下三个百分点。
- The statistical effect of sampling error during the reproduction of alleles is much greater in small populations than in large ones. 在等位基因复制期间,抽样误差的统计学效果对小群体的影响比对大群体的影响大得多。
- Abstract: In this paper,the double-speed synchronous sampling method is introduce d to the power system harmonic measurement, and the corresponding algorithm mode l of DFT is deduced. 文摘:将双速率同步采样法用于电力系统谐波测量,导出相应的DFT计算模型。
- The poll was conducted from Feb. 11-14 and involved telephone interviews with 1,007 adults. The margin of sampling error was plus or minus 3 percentage points. ??? 这项民意测验是在2月11日至14日进行的,共电话采访了1007的成年人。 抽样误差区间为正负3个百分点。
- The algorithm can accurately track the power frequency and decompose the current signals orthogonally into resistive and capacitive components, without recurring to synchronous sampling. 该算法无需同步采样,可以跟踪电网频率并实现电阻性电流和电容性电流的分解。
- This paper studies several synchronous sampling methods and data processing algorithms and put forward a method which combines the GPS and the phase locked loop(PLL) to realize synchronous sampling. 本文从实用的角度研究了目前几种数据同步采样方法和采样数据处理算法,提出了利用GPS与锁相环相结合的方法来实现电网数据的同步采样。
- The software synchronism sampling method based on real-time parameter self-optimizing minishes period truncation error, and the measurement accuracy is improved. 基于实时参数自寻优的软件同步采样,有效地减小了周期截断误差,提高了测量准确度;
- Structure and theory of wide magnitude electrical energy measurement module based on PSOC (EPSOC) are introduced in this paper,adjustable range algorithm and synchronous sampling are analyzed. 介绍了一种基于可编程片上系统(PSOC)的宽量程电能计量模块(EPSOC)的结构与原理,分析了自调增益算法及同步采样算法。
- Q: Would different sample size for different questions affect the sampling error? 问:个别题目的样本数目会否影响抽样误差?
- Several events,that affect genetic variation during ecological restoration,such as sampling error and small population size (bottleneck or founding event and subsequent inbreeding and genetic drift),were extensively discussed. 分析了生态恢复过程中影响种群遗传变异的因素,主要有取样误差和小种群效应(主要是瓶颈或建立者事件及其以后的近交和漂变等);
- The overall results have a sampling error of plus or minus 1.09 percentage points, it said.CareerBuilder.com is owned by Gannett Co, Tribune Co, The McClatchy Co and Microsoft Corp. 在去年与同事约会过的受访者中,三分之一的人称自己的约会对象在公司中的职位比自己高,这其中有42%25的人与自己的上司约会。
- The measuring error, which is caused by the sampling error or electrical-net frequency drift error,can be overcomed, to a certain extent,by the measurment techniques with quasi-synchronization. 由采样误差或者电网频率发生漂移导致的测量误差可以采用准同步方法提高精度。
- The overall results have a sampling error of plus or minus 1.09 percentage points, it said. CareerBuilder.com is owned by Gannett Co, Tribune Co, The McClatchy Co and Microsoft Corp. 调查结果的误差在正负1.;09个百分点之间。凯业必达网站隶属于甘耐特公司、论坛公司、麦克莱奇报业集团和微软集团。调查结果的误差在正负1