容积式流量测量方法和速度式流量测量方法存在费用高，误差大的缺点。
The cost is high and the error is big in volumetric flow measurement method and velocity measurement.
现有的密度补偿模型不适合高温高压饱和蒸汽的流量测量，密度补偿精度较低，导致蒸汽流量测量误差较大。
The existing density compensator model does not fit high temperature and pressure saturated vapor, the density compensator precision is low and causes big error in saturated vapor measurement.
由此发现传统的影响半径计算公式中流量比高达0.368，计算公式可靠性较差，无疑计算结果误差较大。
It is found that the flow ratio is 0.368 in traditional calculation formula for influenced radius that means its reliability is much worse and error is much bigger undoubtedly.
运用流体力学原理，分析了利用时差法进行超声波流量检测时误差产生的相关原因，并提出了修正方法。
The interrelated factors of the error caused by sonic flowmeter using the time difference by hydrodynamics were analyzed, and the correction method was introduced.
对已有水文资料的流量测验次数选择进行允许误差分析，是水文站开展水文巡测的前期性工作。
The analysis of tolerated error in the selection of times for flow tests in hydrologic data available is the initial stage work for a hydrologic station to launch hydrologic surveys.
提出一个高效精确的带宽测量方法，消除背景流量和误差累积的影响。
An efficient and precise methodology of bandwidth measurement is proposed for avoiding effect of cross traffic and error accumulation hop-by-hop.
流体的体积流量受温度、压力等参数的影响，在参数不断变化的情况下，会带来较大的测量误差。
The measurement of volumetric flow rate will be errors when the parameters of the temperature and pressure change unceasingly.
与原节点数据相比，流量和效率特性拟合回代值的平均相对误差分别为0.675%和0.534%。
As compared with the original data, the average relative errors of the corrected flow and efficiency obtained from the model are 0.675% and 0.534% respectively.
用程序计算器进行天然气流量计算，可减少人为的查表和计算误差，操作也十分简便。
The calculation of natural gas flowrate with a programmable calculator can reduce human errors from consulting tables and calculation and its operation is very convenient.
检测气体或蒸汽流量时，介质的工况变化将引入测量误差。
While the flow of gas or steam is detected, measurement error can be brought by the change of medium condition.
本文以超声测流为主要研究对象，建立了流量最优解算方程，分析了其误差特性。
Taking acoustic flow measurement as an object of study the author has proposed an optimum formula, and its error analysis is made.
对于低产气井配产，现场大量的采用绝对无阻流量的1/4~1/6进行配产，这是一种经验方法，运用过程中产生较大误差。
To prorating production for low production gas well, empirical method that of taking 1/4 to 1/6 of absolute AOF is used in field which has more errors.
介绍了变频调速技术在流量标准装置中的应用，并进行了可行性和误差分析。
The application of frequency conversion technology on flow standard unites is introduced, the possibility and tolerance are analyzed.
就我国大量应用的体积流量法自动发油系统，通过对新旧国家标准的误差分析，探讨新国家标准的颁布对自动发油系统计量的影响。
The effect of new and old editions of the involved national standard on the automatic oil delivering system of volumetric type widely used in China is discussed through an error analysis.
该文从理论上对CPFM和带参考室的CPFM的流量测量误差进行了分析。
The errors of measurement of CPFM and CPFM with a reference chamber were theoretically analyzed in the paper.
水位流量关系的确立是一个难题，利用曼宁公式求解会产生较大误差。
To establish relationship between water level and water flow is a difficult problem, and to solve by using Manning's formula will engender fairly great error.
研究雾状流条件下，离散液相对涡街流量计测量误差的影响。
The measuring error of vortex street flowmeter was investigated in condition of mist flow.
并得出在采样气体状态参数和环境条件一定时，除尘效率的测定误差主要取决于取样时间及流量。
Under a definite gas state parameter and environment condition, the measurement deviation was correlated with the sampling time and the flow rate.
对于大管径气体传输来说，气体流场分布情况会影响流量测量的性能，并造成较大的测量误差。
As far as big diameter pipe gas transport is concerned, gas flow distribution will influence the flow measurement performance, and cause a large measuring error.
对正弦脉动气体流中涡轮流量计的测量误差进行了理论和实验研究。
The measurement errors of the turbine flowmeter under pulsating gas flow are studied, both in theory and experiment.
通过对体积管检定流量计运行过程的分析，从中找出了影响流量计检定误差的因素。
Factors affecting detective errors of flowmeter have been found out through the analysis of operation condition of pipe-type detection flowmeters.
主要叙述弯管流量计的进展、原理及流量公式、主要误差、应用情况以及前景等。
Progress, principle and flow-formula, main error, application situation and prospect of bend pipe flowmeter are described.
试验结果表明，此装置得出的流量值比原在进气管道出口截面处得出的流量值误差小。
The test shows that the errors are less than those from measuring at cross section of outlet.
介绍了质量流量计的工作原理，分析了误差产生的原因，指出了影响流量计准确度的各种因素，同时给出了零点校准的方法。
Principle of mass flowmeter is intro-duced. Causes for error is analyzed. Factors that have impacts on accuracy of flowmeters and calibration measures are presented.
该算法能够使路由器中的队列长度快速零误差地跟踪上参考队列长度，并且在长时延网络环境和动态流量网络环境中均具有快速的响应性能。
It can make the queue length in the router track the reference queue length with non-error, and also has fast response performance both in large delay networks and dynamic traffic networks.
以往常采用明渠流量计测回流污泥量，不仅误差大，而且流量系数转换、标定都十分困难。
Traditionally the flowrate of returning activated sludge was measured by open channel flowrate meter with higher error, difficult transform of flowrate coefficients and inconvenient calibration.
实验数据表明：该计测模型可以适用于多相流中不同粘度的液相流量计量；可适用于较宽的气、液相流量变化范围，模型计测误差稳定在可接受的水平。
The results show that errors of the model are reasonable acceptable despite the variations of viscosity of liquid, and in a wide gas and liquid flow rate range.
通过研究柱塞泵制造过程中的随机误差，明确提出了机械误差对曲柄柱塞泵流量的影响。
On the basis of studying the chance error occurred in the manufacturing process of plunger pump, the writer puts forward the influence of mechanical error on the flow rate of the crank plunger pumps.
通过研究柱塞泵制造过程中的随机误差，明确提出了机械误差对曲柄柱塞泵流量的影响。
On the basis of studying the chance error occurred in the manufacturing process of plunger pump, the writer puts forward the influence of mechanical error on the flow rate of the crank plunger pumps.
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