To locate an unknown jamming signal source, two or more fixed stations are connected through network. Existed algorithms effect on extending DF range and enhancing location precision in part. However, it is impossible to superpose estimator over actual value because of various errors, or eliminate the error. Moreover, there is still a large error area of probability ellipse, which makes the precise location cannot available.
尤其在查处未知干扰信号源方面，为了确定该信号源的地理位置，常用两个或多个固定测向站联网进行测向定位，现有的算法虽然在扩大测向范围和提高定位精度方面起到了一定的作用，但是由于各种误差因素的存在，仍不可能使多元固定站交会定位的结果与被测目标位置完全重合或具有很小的偏差；而是存在一个不小的概率椭圆误差区域，因而无法精确确定被测目标的真实位置。
The other source of error is the θ-L relationship that was derived for the reference block height.
我们假设比例因子对于倾斜的玻璃块是固定的，因为如果高度未知的话，对于一块倾斜玻璃块来说，它的值就不能计算。
Results There exist negative correlation between the goodness of fitand localization error, elementary torso models impose on site accuracy being inversely proportional to source depth.
结果 适合度g与定位误差成负相关关系，考虑边界元模型时ECD定位精度与场源离开表面的深度成反比关系。
The Frame Check Sequence is used to determine if any errors in the layer 2 address field occurred during transmission. The FCS is calculated prior to transmission and the result is inserted in the FCS field. At the distance end, a second FCS value is calculated and compared to the FCS in the frame. If the results are the same, the frame is processed. If there is a difference, the frame is discarded. No notification is sent to the source when a frame is discarded. Error control left to the upper layers of the OSI model.
讯框检查顺序用来检测在第二层的位址栏在传输时是否有错误发生，在传送前就必须计算讯框检查顺序并把结果存在讯框检查顺序栏位，在一个距离的端点，第二个讯框检查顺序会被计算并且跟前一个作比较，假如比较结果是一样的，这个讯框就会被传送，如果不同就放弃此讯框，放弃时不会通知来源地点，错误控制交给OSI模式的较上层去管理。
In this case, the offset current of the switch will be the dominant error source.
在这种情况下，开关的偏移电流将是主要的误差源。
The first part of this thesis presents the study on the acoustic attenuation in a duct by using the combination of fuzzy neural network with error back propagation algorithm to control secondary source.
论文第一部份运用了模糊类神经网路搭配误差倒传递演算，控制第二声源，以达到管道噪音消除的目的，模糊推理系统重要的优点在於结构化的知识，被表示为IF-THEN的条列式规则，但是此一模糊推理系统对应於外在的环境时，却缺乏了自我调整的能力。
The first part of this thesis presents the study on the acoustic attenuation in a duct by using the combination of fuzzy neural network with error back propagation algorithm to control secondary source. The most important advantage of fuzzy inference system is that the structured knowledge is represented in the form of fuzzy IF-THEN rules. But it lacks the ability to accommodate the change of external environments.
论文包含了以下二个部份：论文第一部份运用了模糊类神经网路搭配误差倒传递演算，控制第二声源，以达到管道噪音消除的目的，模糊推理系统重要的优点在於结构化的知识，被表示为IF-THEN的条列式规则，但是此一模糊推理系统对应於外在的环境时，却缺乏了自我调整的能力。
Finally the error source of the model and the expansibility of the system are discussed.
最后，讨论了该模型的时钟同步过程的误差来源及其系统的扩展性问题。
The symetry and near point correlation methods have been proposed and constructed to measure the gas flow speed and the actually measured results, the error source, their ability against pollution and disturbance have been discussed.
采用对称点及邻近点布置的结构形式，利用相关原理进行了实测，并对其结果、误差来源及抗干扰、污染能力进行了分析。
According to this research, we found: 1. The masking effect of 500Hz48.525±1.205dB(A is higher than 2kHz36.759±2.588dB(A, while the error score of 2kHz sound is relatively high; 2. Both moving velocity of two sound sources (500、2kHz) have significant difference to sound interference (p＜0.0013.When time duration is fixed on central position of masking sound, 16o/s has higher masking ability to sound, while the masking ability of 16o/s falls significantly 500Hz:40.00dB(A; 2kHz:31.29dB if time duration is fixed on the start of masking sound; 4. When frequency is 2kHz and time duration is fixed on the central position of masking sound, 40~56o/s would become key range of sensation ability. We also propose the forecast formula for moving speed to sound masking level in accordance with experiment result; 5. By using loudspeaker arrays to simulate moving sound source, we found the minimum overlap scope of 500Hz is 4ms and the rise/decay is 2ms respectively; minimum overlap scope between 2kHz is 7ms and the rise/decay is 4ms respectively. Accordingly, it confirms that said simulation approach has better sound localization sensitivities.
研究发现，1、500Hz48.525±1.205dB(A的遮蔽效应高於2kHz36.759±2.588dB(A，但2kHz语音之错听率却相对较高；2、两声源(500、2kHz)移动速率对於语音的干扰均有显著差异(p＜0.001)；3、语音发音时间固定於遮蔽音之正中央位置时，16o/s对於语音的遮蔽能力较大500Hz：44.54dB(A；2kHz：38.71dB，而语音发音时间固定於遮蔽音之起始点时，16o/s之遮蔽能力明显下降500Hz：40.00dB(A；2kHz：31.29dB；4、当频率为2kHz、语音发音时间固定於遮蔽音之正中央位置时，40~56o/s为改变感知能力之关键范围，并依据实验结果，提出移动速率对於语音遮蔽程度的预测公式；5、以扬声器阵列法模拟移动性声源，已找出500Hz最小涵盖范围为4ms，淡入/出时间为2ms；2kHz声源间最小涵盖范围为7ms，淡入/出时间为4ms，并证实该模拟方式具有较佳之声源定位能力。
The measurement method of the polarization grade for the source and depolarization and the concept of the polarization error for the illuminance meter are described.
介绍了光源偏振度的测量和消偏振的方法以及照度计偏振误差的概念。
The measurement method of the polarization grade for the source and de polarization and the concept of the polarization error for the illuminance meter are described.
文摘：介绍了光源偏振度的测量和消偏振的方法以及照度计偏振误差的概念。你知道它的英文吗？
When the specimen area is larger than the mouth area, this overlay upon the ledge is a source of error, particularly for thick specimens.
当试样面积大于杯口面积时，试样在透湿杯边缘的覆盖就成为一个误差来源，尤其是对于较厚的试样。
Adopting the numerical frequency selection and fine frequency analysis, the instrument is able to diagnose exactly the error source.
仪器采用锁相倍频技术提高了测量精度，采用数字选频和细化谱分析方法增强了诊断误差来源的能力。
In order to solve the problem about the location of gearbox noise source and measure the value, noise mechanism of automobile gearbox was investigated. The relation between noise intensity and gear meshing frequency was analyzed. The computer aided noise testing system of automobile gearbox was designed based on FFT, and the error of the testing system was investigated.
摘 要：为了实现对汽车变速箱总成振动噪音的定量测量和定位判断，根据线性系统振动噪声的频谱叠加机理分析，阐述了变速箱各档配对齿轮啮合频率与啮合噪声外在表现的联系，研究了基于FFT实现的变速箱齿轮噪声CAT测试系统，并对有关误差进行了分析。
Technology of China, Chengdu 610054, China）Abstract: In order to solve the problem about the location of gearbox noise source and measure the value, noise mechanism of automobile gearbox was investigated. The relation between noise intensity and gear meshing frequency was analyzed. The computer aided noise testing system of automobile gearbox was designed based on FFT, and the error of the testing system was investigated.
摘 要：为了实现对汽车变速箱总成振动噪音的定量测量和定位判断，根据线性系统振动噪声的频谱叠加机理分析，阐述了变速箱各档配对齿轮啮合频率与啮合噪声外在表现的联系，研究了基于FFT实现的变速箱齿轮噪声CAT测试系统，并对有关误差进行了分析。
This work also investigates the error source impacted on the laser footprint position. These errors include laser ranging error, trajectory erro, attitude error, kinematic time delay error, the secondary height error cause by slope, scan angle error, integration error etc. This consists of an detailed error analysis. The key problem consists in bringing together all necessary elements for geo-referencing the laser data, where the quality of each contributing part has to be monitored regarding accuracy and systematic effects.
机载激光扫描测高会受到多种误差的影响，包括测距误差，GPS 定位误差，姿态测量误差，动态时延误差，二类高程误差，扫描角误差，安置误差，系统集成综合误差等，这些误差会给激光脚点的坐标带来系统偏差，研究这些误差对激光脚点坐标的影响规律并设法消除或削弱这些误差的影响是获取高质量三维地形数据的前提。
In contrast, the unguarded error voltage with this combination of source and shunt resistances would be about 9%.
相反，在同样的源和分流电阻情况下，不采用保护技术时的误差则大约为9%。
Q: I get this error message when compiling a large source file.
问：编译大文件时，我得到这个错误信息。
Meanwhile through to the classify error classification and research the error processing method, the paper has analyzed error source of the virtual instrument for shale shaker mud parameters measurement, and proposed the revision method and the revision measure.
同时通过对误差的分类和误差处理方法的研究，本文分析了虚拟式振动筛泥浆参数测试系统的误差来源，并提出了修正的方法和修正措施。