查询词典 error constant

On the basis of measure principle of micro-power magnetic flux used by electronic integrator,a new kind of electronic integrator whose measurement sensitivity can reach as high as is designed to against the factor of integration drift,integration time constant etc which will effect Integration output error.

在将电子积分器应用于测量微磁通原理的基础上，针对影响积分输出误差因素中积分漂移、积分时间常数等的分析，设计了一种测量灵敏度为10-9C的新型电子积分器，并将该电子积分器应用于10-7～10-8C电量微磁通测量系统中。

It has no secular energy error for the integration of periodic orbits with constant time-steps. The upper bound of mass was given for an imaginary planet in the main asteroid belt with this scheme.

演化模型是太阳系N体模型(N=7)，即把水星、金星、地球的质量加到太阳上，忽略冥王星，同时在小行星主带附近增加一个天体，系统演化时间为一亿年。

To make the constant in the interpolation error independent of element size,the ratio of the diameter of the element and the diameter of the biggest ball contained in the element,is uniformly bounded.

传统的有限元方法误差估计需要满足正则性条件或非退化条件，即：单元的直径和单元的最大内切圆直径的比值是一致有界的。

The nonlinearity and discrete gradient inherited in CAViaR model is a conundrum for parameter estimation. We take the asymmetric Laplace distribution with scale parameter as the error process; indicate the variance has a minimum positive value when the scale parameter is a constant, conflicting with the distribution of real financial data. Further we estimate the parameters of indirect TARCH-CAViaR model base on Bayesian framework and Markov chain Monte Carlo method. The optimal scale parameter can also be obtained by Markov chain Monte Carlo method.

CAViaR一般模型中递归分位回归方程的非线性和非连续可微性是参数估计的一个难题，基于含有尺度参数的不对称拉普拉斯分布作为误差过程，指出将尺度参数固定为常数会导致不对称拉普拉斯分布随机变量的方差存在最小正值的限制，与实际金融数据分布不符；进而提出采用贝叶斯分析和马尔科夫链蒙特卡罗模拟方法，估计间接TARCH-CAViaR模型的参数，并可获得尺度参数的合理估计。

The non-reference-signal's adaptive digital filter algorithm of multi-sensor data fusion in the course of adaptive filter can be done without reference signals. It can adjust convergence constant automatically, it can also be recurred with real gradient value. Thus the field to apply the adaptive filter is widened, the convergence speed of the adaptive filter is sped up, the weighted disadjustmend is decreased, so that the last error of mean square approaches its minimum value more.

这章研究的基于多传感器数据融合无参考信号的自适应数字滤波算法其在自适应滤波过程中具有不用参考信号与自动调整收敛因子及使用实际梯度值进行递推的特点，这样不仅可扩大自适应滤波的使用范围，而且还使自适应滤波的收敛速度加快有效地减小权失调，从而使最后的均方误差更接近于其最小值。

This paper studied a filtering high order numerical method for one dimension constant coefficient hy2 perbolic function. The stability and error analysis show the efficiency of this method. Numerical examples are also given to verify the analysis results.

摘 要 考虑一维常系数双曲型方程的高阶数值解法，引进了一种稳定性过滤算子FN ，最后从理论和数值实验上分析了该过滤算子对数值解稳定性和精度的影响。

Our main contribution of the thesis is in Chapter three, and a new kind of method to estimate the observational error variance, usually assumed a constant whose value can be evaluated ,was brought up for Univariate Bayesian Normal Dynamic Linear Model ,the most important and common one in practice.

在论文引言中，我们首先较为简要介绍了Box─Jenkins传统时间序列分析方法和它的研究现状，然后对贝叶斯动态线性模型及其预测进行了概述。

The paper makes Correction for the error in the calculation method of phase constant of Symmetrical transmission line often used at present, and gives the accurate calculation formula of β that is not only convenient to use but also suitable to program for computer.

1相移常数计算中存在的问题在对称传输线一次和二次传输参数的计算中，目前广泛采用开、短路测试法。利用这种方法获得的传输参数大多具有较高的准确性，其结果一般是令人满意的。

The technique made full use of the characteristic of PR controller which can realize zero steady-state error in AC input signal in stationary frame. In the method, the active and reactive current component in the vector control strategy were transformed in the stationary frame to achieve the objective of keeping the DC-link voltage constant, adjusting the power factor and decoupling the active and reactive power. Compared with conventional double close-loop proportional integral controller, the PR technique is better in harmonic compensation without the complex rotating frame transformation and the couple or feedback voltage which is easily influenced by temperature and circuit parameters. The control algorithm is easy to be realized while the robustness and power quality is improved.

该方法充分利用了PR控制器能够在静止坐标系下对交流输入信号无静差控制的优势，将矢量控制策略下的有功电流和无功电流分量转换到静止坐标系下进行调节，实现网侧变换器维持直流电压稳定和调节功率因数的控制任务和双馈电机有功、无功功率的解耦控制，与传统的双闭环PI控制相比，该策略无需繁琐的坐标旋转变换，不存在受温度及电路参数影响的耦合项和前馈补偿项，且易于实现对系统低次谐波电流的补偿，减小了控制算法实现难度，提高了控制系统的鲁棒性和电网电能质量。

This instrument used the parallel p late capacitor to measure relative dielectric constant of film, which equaled to the ratio of the capacity value full of film and the capacity value full of air. It app lied the equipotential ring technology to reduce the error caused by edge effect in the two p late edges, and greatly increased the measurement p recision and accuracy.

该仪器采用将平行板电容器充满薄膜的电容值与充满空气的电容值相比的方法得出薄膜的相对介电常数，并采用等位环技术，减小了两极板在边缘处产生边缘效应所带来的误差，大大提高了测量的精度和准确性。

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。