查询词典 harmonic analysis

Installation, test and practical measurements of the whole system also have been implemented. Studied the various methods of digital monitoring dielectric loss for transformer bushes: harmonic analysis method. Sine-shape parameters method and integration method, states the principles of the three methods, its computational formula has been inferred and compared. Among them, harmonic analysis method was used to test practically both in lab and on site.

研究了变压器套管介质损耗的数字化监测方法：谐波分析法、正弦波参数法和积分法，论述了三种方法的监测原理，详细推导了各种方法的计算公式，比较了各种方法的优缺点，并采用谐波分析法在实验室和现场进行了测试，其结果表明该方法在介损测试中具有较高的稳定性和准确性。

With the progress of the harmonic arithmetic, the instruments for harmonic analysis have become more and more.

在谐波分析算法进步的同时，用于谐波分析的仪器也越来越多。

It has practical value for power system harmonic analysis and harmonic restraint.

对于电力系统谐波分析和抑制具有很大的实用价值。

However, harmonic analysis lays the foundation for power harmonic treatment. The paper discusses the development of a power harmonic analyzer hosed on DSP and LabVIEW, which is used to analyze and measure harmonic on real-time. The analyzer's hardware, harmonic analysis algorithm, LabVIEW software design and the implementation are alt brought forward in detail.

为了有效地检测电力谐波，并对其进行治理，本文将DSP与LabVIEW虚拟仪器技术相结合，提出了一个谐波实时测量分析仪的设计方案，同时给出了系统的硬件构成和谐波分析算法，以及LabVIEW子程序的详细设计及实现。

It has harmonic analysis function and power energy accumulation function. It can analyze voltage, 2-50 times harmonic capacity of current, total harmonic capacity.

具有谐波分析功能，能同时分析电压、电流2～40次谐波含量及总谐波含量；电能累计功能。

The main results are:(1) the L1 boundedness of the Cesaro means operator of the harmonic expansions on the unit sphere with reflection-invariant measures is proved, and the characterization of the convergence index is given; for the points not in the planes with singularities, the pointwise convergence is also proved; these results are the generalizations of those both for the classical spherical harmonic expansions and for the Jacobi expansions;(2) Using the differential-reflection operators of Dunkl type, the uncertainty principle of a class of Sturm-Liouville operators is established, and as consequences, the uncertainty principles of some well-known classical orthogonal expansions such as Jacobi, Hermite and Laguerre expansions are obtained;(3) by introducing the Cauchy-Riemann equations in terms of the differential-reflection operators of two variables, the harmonic analysis of the extended Jacobi expansions is studied; the results include the Lp boundedness and the weak-L1 boundedness of the conjugate extended Jacobi expansions; specially, for some indexes p smaller than 1, the basic theory of the related Hardy spaces is established.

主要成果有：（1）证明了带有反射不变测度的球面调和展开蔡沙罗平均算子的L1有界性，给出了收敛指标的特征刻划，对不在奇性平面上的点，还证明了点态收敛性，这些成果同时推广了经典球面调和展开和雅可比展开的结果；（2）利用Dunkl型的微分-反射算子建立了一类斯特姆-刘威尔算子的测不准原理，并由此得到一些著名的经典正交展开如雅克比展开、赫米特展开和拉盖尔展开的测不准原理；（3）利用由两个变量的微分-反射算子定义的柯西-黎曼方程组来研究扩展雅克比展开的调和分析，证明了共轭扩展雅克比展开的Lp有界性和弱L1有界性，特别是对小于1的一些指标p，建立了相应的哈代空间的基本理论。

The mathematical methods to calculate the theoretical models of satellite magnetic anomalies, spherical harmonic analysis, spherical cap harmonic analysis, rectangular harmonic analysis and equivalent source method, were introduced in this paper.

本文介绍了计算卫星磁异常理论模型的数学方法，即球谐分析方法、冠谐分析方法、矩谐分析方法和等效源方法。

By study, majority of the research productions and theoretical papers are about how to control harmonic, and the harmonic analysis methods that were introduced are generally applied in large power system, these harmonic analysis methods usually use harmonic network's mathematic model (the conductance and susceptance matrix of the node). But because of the dissymmetry of some elements in power system, the mathematic model is very complex, so it is very complicated to calculate by these methods, we commonly combine with computer and use them to analyze large power system.

通过学习和了解，现有的研究成果和理论文章多数是介绍谐波的治理方法，而介绍谐波分析方法的论文一般是针对大型电力系统进行分析和研究的，这些谐波分析方法通常利用谐波网络的数学模型（谐波网络的节点导纳矩阵）进行分析，由于电力系统中的某些元件的不对称性，使得数学模型复杂，计算起来极为繁琐，因此，一般结合计算机用于分析大型电力系统。

Second, Unexpectable situation such as bad weather or apparatus problems will cause some other cases, for example, tidal level data cant be measured completely or contains great errors. Aim at these cases, according to multiple harmonic analysis method, this paper presents a new method for the iterative harmonic analysis of tides based on the least square method of continuous function, as well as the condition when this method converges.

第二、针对恶劣天气或仪器等意外情况导致潮位数据缺测或者具有重大误差等情况发生时，根据多次调和分析方法的思想，给出了基于连续函数最小二乘法的潮汐迭代调和分析方法，给出了方法收敛的条件。

The static, modal and harmonic analysis was performed in ANSYS; static capacitance, natural frequencies for the short circuit case and the open circuit (anti-resonance) case, dynamic resistance, frequency at half-power point, dynamic inductance and mechanical quality factor were computed via static, modal analysis and harmonic analysis.

为了加速低频超声雾化栽培喷头的设计制造进程、降低研发成本，该文提出了其阻抗的测试原理电路图，建立了阻抗分析的有限元模型，在大型通用有限元分析软件ANSYS中进行了静态分析、模态分析和谐响应分析。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。