查询词典 systematic sampling

L , Tuandao (293.95 ind./L), Huangdao (283.7 ind./L) and Nautical School (107.23 ind./L).5 At the Nautical School Sampling Station (24 hour monitoring station), the highest average density of microzooplankton was recorded at sunset (154.91 ind./L), successively, at sunrise (146.63 ind./L) and noon (93.09 ind./L), the lowest was at midnight (77.31 ind./L).6 Protozoa and copepod nauplius were the most dominant groups , comprising more than 90% of the total abundance of microzooplankton.7 In comparison with other gulf waters in the world, densities of microzooplankton and loricate ciliates in Jiaozhou Bay were at intermediate level.

在航校昼夜监测站，小型浮游动物的平均丰度以傍晚最高，其次是黎明和正午，午夜时密度最低，分别为154.91个／升、146.63个／升、93.09个／升和77.31个／升。6、胶州湾小型浮游动物以原生动物和无节幼体为主，两者共占小型浮游动物总数的90％以上。7、与世界其它海湾水域相比，胶州湾小型浮游动物的总平均丰度和砂壳纤毛虫的丰度，处丁中等水乎。

By this method, the radar system can utilize fewer sub-pulses and lower AD sampling rate to measure stationary and moving targets in large range window with wideband signal.

利用较少的子脉冲和较低的系统采样率，该方法可实现大带宽信号对大距离窗口内静止和运动目标的观测。

Leakage can also be identified by sampling surfaces in the chamber after lyophilization for contaminants.

可以在冻干结束后进行前箱的表面污染物取样，判断是否泄漏。

Provide a comprehensive inspection and sampling inspection methods, such as flexible, easy to grasp the macro level Cong quality data and detailed analysis of each type of error

提供全面检查和抽检等灵活检查方式，便于丛宏观上把握数据的质量情况，并能详细分析每一种错误类型

This experiment was conducted to study the reasons of bovine low performance from one aspect of major matter and energy metabolism in high altitude regions. The index of nitrogen equilibrium, energy material, macroelement, microelement, ADE, AME, absorbance of phosphorus, MEm, average daily gain etc. were analyzed by field test and sampling.

为从主要物质和能量代谢方面揭示高海拔引起牛生产性能低下的问题，利用实地测试取样，对西藏农区14头牛的N平衡、能量物质、主要常量元素、微量元素、FHP、ADE、AME、P沉积、MEm、日增重等代谢指标进行了分析。

Base on the principle, the main circuit and control circuit of 2-phase hybrid stepping motor systems are designed. The system can realize many functions such as fix-frequency pulse width modulation, current sampling, power magnifying, ring distribution, producing control signal, and so on.

完成了对二相混合式步进电动机微步驱动系统主电路及控制电路的具体设计，实现了恒频斩波、信号检测、环形分配、微步信号的产生等功能，并搭制了实验电路进行实验验证。

The invention discloses a measuring method for firing conclusion and gas flow rate in the process of liquid, gas fuel firing, which comprises the following steps: positing three points on fuel transmission pipe, air pipe and gas pipe, setting regular measuring device or sampling device, measuring the flue's element and flow rate of point 1, air element of point 2, and gas element of point 3, inputting the data of three points into computing unit, computing air flow rate Mair, gas flow rate Mgas and firing conclusionηB by the element of air, flue, and gas and flue flow rate Mburn.

本发明公开了一种液体、气体燃料燃烧过程中燃烧完全度和燃气流量的确定方法，步骤为：在燃料输送管道、空气管道和烟气管道上分别设置三测点，并安装常规的测量装置或取样装置；分别测量测点1的燃料成分和流量；测点2的空气成分；测点3的燃气成分；将三测点的测量数据输入计算单元；根据空气、燃料和燃气的成分以及燃料流量M burn ，计算空气流量M air 、燃气流量M gas 和燃烧完全度η B 。

Relatively high criteria for quality assurance of malodor sampling were also required.

对恶臭采样的质量保证也提出了较高的要求。

Sampling technology of malodor was completely described based on the existing national standard method.

针对现有国标方法中的恶臭采样技术进行了更为全面的叙述。

Methods A resident （≥ 5 years） group of 30 214 people aged ≥35 years in seven small towns of Liaoning province was investigated by duster multistage and mandom sampling.

目的了解北方农村地区成年人群冠心病的流行病学特征和相关危险因素，为北方农村地区冠心病的防治和干预接供科学依据。

Chinese traditional virtue is humility and wariness,the compliment and praise to the others should be declination

中国人的传统美德是谦虚谨慎，对别人的恭维和夸奖应是推辞。如

We bought this house on the never-never.

我们以分期付款的方式买下这座房子。