误差分析

Characteristic of contact force and its effect on limit load were investigated between pad and cylinder.

本文采用有限元分析方法对壳体-补强圈之间的接触行为进行了研究，阐述了接触压力的特性以及接触压力对极限载荷的影响，并对计算结果进行了误差分析。4。

According to the demand of high magnetic field power supply, reference is increased with a set ramp rate and stops at a set stable value, so reference system is composed of digital setting and digit to analog converting circuit. But the stability of reference is mostly guaranteed by the performance of D/A circuit, so D/A circuit is particularly studied in reference system. The scheme of D/A circuit, the selection of DAC and its voltage reference, hardware anti-jamming design and PCB design are discussed in detail, and software of remote control and PLC are discussed in brief. Zero-flux DC current transformer well satisfies the demands of the high stability of Load current detection unit, so the principle of zero-flux DC current transformer is analyzed; in the mean time a project which detects the long term stability is designed. During 8 hours, analog signal which is detected with high precision digit multimeter is recorded in computer at 1HZ frequency by GPIB communication. The drift error source and related parameters are explained in the compare-amplify part. Detailed subtraction circuit is designed; also amplifier chip and periphery components are selected and verified according to the theory of error analysis.

根据强磁场电源的需求，参考源应按照软件设定的斜率逐渐上升到设定稳态值，则参考源系统应由数字给定和数模转换电路两大部分组成，而参考源的稳定度主要依靠完成数模转换功能的模拟电路的性能来保证，因此本文对参考源系统的研究以数模转换电路为重点，分别从电路方案的确定、数模转换芯片及其基准电压源的选取和验证、电路板硬件抗干扰和PCB设计几方面进行了论述，然后对数字给定部分的远控组态和PLC程序设计作了简要介绍；采用零磁通原理的直流电流转换器很好地满足了对负载电流检测单元高稳定度的需求，本文详细分析了零磁通检测的原理，并在选定此种类型电流转换器的基础上设计了一套检测长期稳定度的方案，8小时内以1秒为采样周期，通过计算机Labview程序和高精度数字电压表的GPIB通讯，将被高精度数字电压表数字化后的模拟信号采样值连续记录至计算机中；比较放大环节简要阐述了漂移产生的原因和相关参数指标，确定了具体的减法电路形式，并根据误差分析理论对运算放大器和外围元器件进行了选取和验证。

In this paper, a new dynamic accuracy theory is developed. It called the theory of the tracing of dynamic measuring error. The total output error is discomposed to the internal units as well as the external noises. And its modeling methods are discussed. Wavelet neural network is an important method in modern signal processes.

近年来 ，国内外不少学者致力于动态测试方法及数据处理方法的研究，取得了一定的成果，但是对动态测试误差分析方法的研究还不够成熟，不能满足现代高精度测试的要求，需要深入研究新的理论和分析方法。

According to the error analysis, the theoretical analysis consists well with the experimental results.

通过误差分析看出理论分析和实验结果吻合的很好。

Describe model testing and sensitivity analysis, including error analysis, etc.

模型的测试与灵敏度分析，包括误差分析等。

Error Analysis of UGPS Error sources of UGPS include GPS observation error, attitude error, baseline network strength, sound velocity error, time measuring error.

系统的误差分析实现水下的精密定位，需要分析影响系统定位的各种因素。

Based on the finite element model of temperature field,and related...

对计算出的温度作了相应的误差分析，得出该有限元数学模型的精度比较可靠；并在模拟计算结果的基础上进行了相关的温度场分析。

One position control system is introduced as the objective controlled by FOC. Based on Mittag-Leffler function, the fractional order control system with full memory length is adopted as evaluation criterion, and an approximation performance function of discretization methods is proposed. Analyzing the time domain error and approximation performance, the investigation to various discretization methods is carried out comparatively in detail.

引入一个位置控制系统作为分数阶控制对象，将Mittag-Leffler函数的全记忆长度分数阶控制系统作为评估基准，提出了一种离散算法的近似性能函数，通过时域误差分析以及近似性能分析，对比研究了分数阶微积分算子的数字实现方法。

Starting from the signal of pressure and temperature, this paper does a series of theoretical and experimental researches on the following topics: the fundamental theory of the thermal parameter method, its field of application, the choice of diagnostic signal, the choice of the technologies on analysis of the signal, the foundation of the database of the fault samples, the application of the artificial nerve net technique and the error analysis of the experimental systems.

本文以参数法中的热力参数为研究对象，以压力、温度信号为研究信号，就热力参数法的基本原理、适用范围、诊断信号的选择、诊断信号分析技术的选择、故障样本库的建立、人工神经网络技术的应用及实验测试系统的误差分析等一系列问题展开了较深入系统的理论和实验研究。

Numerical integral ; error analysis ; wavelet packet analysis ; filter design ; structural damage

数值积分；误差分析；小波包分析；滤波器设计；结构损伤

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。