In large scale field surveys, multistage sampling is applied because the situations are complex and there are many influencing factors.
大规模现场调查，由于情况复杂、影响因素多，往往采用多阶段混合型随机抽样方法。
In short, the Sun's large-scale magnetic field is taken to be self-sustaining, so that the solar-activity cycle it drives would be maintained with little overall change for perhaps billions of years.
简单来说，就是太阳的巨大磁场被用来进行自我维持，所以，由其驱动的太阳活动周期将会在几十亿年的时间里维持整体上维持极小的变动。
Building in the field of engineering, the phenomenon of large-scale, universal, long-standing impact is enormous.
建设领域工程款拖欠现象的大量、普遍、长期存在所造成的影响是巨大的。
In this study, through questionnaires, investigate 105 large-scale stadium in Guangzhou, Wuhan, Jinan, Chengdu, Xiamen, Nanjing, and interview person who are being in related field and in charge.
本研究通过问卷，对广州、武汉、济南、成都、厦门、南京六个城市的105所大型体育场馆进行调查，并对相关场馆负责人和管理人员进行了访谈。
The result was a paradigm shift in the medical field that allowed for Artemisinin to be both clinically studied and produced on a large scale.
这一结果在医疗领域带来了一种范式转移，使青蒿素既可用于临床研究，也可进行大规模生产。
Therefore, research on the arena of the China's large-scale track and field event is an extremely necessary work to do.
为此，对我国大型田径赛事赛场风险进行相关的研究是一项极其必要的工作。
With the rapid development of LSI (Large Scale Integration) and computer science, digital technology has penetrated into every field of knowledge.
随着大规模集成电路和计算机技术的飞速发展，数字技术渗透到各个技术领域。
The comparisons between results of simulation and objective analysis have shown that MM5 has the ability to replicate large scale and mesoscale circulation systems and their thermodynamic field.
数值模拟结果和客观分析结果的比较表明，非静力中尺度数值模式MM5有能力再现地面以上大、中尺度环流系统和热力场；
In the field of Compton scatter imaging, the problem of how to image a large-scale object is still not fully settled.
在现有的康普顿散射成像技术中，如何对大型物体进行成像的问题始终没有得到充分解决。
A method of precision evaluation for field large-scale measurement instruments is proposed with multi-instrument stations and multi-reference points.
针对现场全面评价大尺寸测量仪器精度的特殊性，提出了一种采用多仪器站多控制点的精度评价方法。
The small measuring field of sensor unit is the key problem in the free form surface measurement of large scale objects.
本文针对大型物体自由曲面测量中，传感器单元测量区域小等问题，提出了一种基于粘性目标实现空间图像拼接的方法。
In this paper the advances and trends of studies on stability of motion are reviewed in the field of mechanics system, control system, large-scale system, shock system, indeterminate system etc.
本文概述运动稳定性学科在力学系统、控制系统、大系统、冲击系统、不确定系统以及一般理论等方面的研究进展和趋势。
In foreign language writing assessment field, human rater has been predominantly used to evaluate writing samples both in large-scale test (such as College Entrance Exam) and classroom test.
在外语写作测试领域，人工评估主要应用于大规模写作测试和班级写作测试中。
In Liulin spring-field, there are abundant Karst ground water resources, but not yet exploitation and application of large-scale at present.
柳林泉域内赋存丰富的岩溶地下水资源，目前还没有大规模的开发利用。
So the methods of modeling these equipments and industry buildings are very important for applying digitalized factory technology in designing large-scale factory field.
因此我们有必要深入研究数字化工厂，特别是工厂底层模型开发及其管理技术，使其能有效的应用于大型工厂设计。
The large scale and amplitude of gravity field anomaly variation appeared in north Shanxi area before the earthquake.
晋北地区地震前后出现了明显的重力场变化，并具有异常范围大、幅度高的特点。
Today we are a small team of specialists in the field of design and visualization, able to implement large scale projects around the world.
现在，我们是一个的能为你解决设计和可视化领域的团队，能够实现世界各地的大型项目。
In large scale integrated chip field, the IC of BGA encapsulation was widely used.
在大规模集成芯片中以BGA(球栅阵列)封装的IC芯片被广泛使用。
Present tectonic stress field is one of the most important factors to evaluate regional stability in project areas especially in construction of large - scale hydroelectric projects.
现今构造应力场是评价工程地区稳定性最重要的因素之一，特别对大型水电工程建设具重要意义。
Gas injection flooding as an important method of EOR has been researched and applied on a large scale in both laboratory and field.
注气驱油作为提高采收率的一种重要方法，国内外已在实验室和现场进行了相当规模的研究和应用。
A small waterflood or enhanced oil recovery project that is run on small portion of a field to determine the field's suitability for a large scale project.
为了确定注水开发或强化采油对油田大规模采用的适应性，对油田的一小部分进行的小规模的注水开发或强化采油。
In addition, the world without gasless union meeting also held simultaneously, this is this field of large-scale, high levels of academic exchanges.
除此之外，世界无气腹联合会会议也同时举行，这是该领域的大规模、高水平的学术交流。
Existing studies are mostly speculative logic of experience and lack large-scale field research.
现有的研究多是对经验的逻辑思辨，缺乏大范围的实地调查研究。
Foundation pits generally gather at the field with large population and construction density and small spatial scale.
基坑工程一般集中在城市人口密集、建筑密度大的狭小场地。
The flow field visualization of a straight HP turbine cascade is conducted in a large-scale low-speed open -loop cascade heat transfer wind tunnel.
在大尺寸低速开式叶栅传热风洞中对一种高压涡轮导向叶栅中的流场进行了流动显示实验研究。
This paper discusses the content and trend of development of electric automatization technique in large-scale power plant adopt field-bus technique.
讨论了采用现场总线技术的火电厂大型机组电气自动化系统的内容和发展趋势。
Presently, the method of steady state unbalanced currents is widely used in the field test of torsional vibration characteristics of large-scale steam turbine generator rotor system.
目前大型汽轮发电机组轴系扭振特性的现场试验中广泛采用稳态不对称短路变频激振法。
Presently, the method of steady state unbalanced currents is widely used in the field test of torsional vibration characteristics of large-scale steam turbine generator rotor system.
目前大型汽轮发电机组轴系扭振特性的现场试验中广泛采用稳态不对称短路变频激振法。
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