查询词典 method of difference

New method for detecting and tracking of moving target based on difference and invariant.

基于差分和特征不变量的运动目标检测与跟踪

Thereby the stable temperature field is analyzed by using the finite element method, and the mean temperature, temperature difference between the inwall and outer wall of the tube sheet and cylinder are worked out, which is taken as the heat load for an analysis of the stress field.

为此， 运用有限元法对稳态温度场作了计算，求得管板、筒体等部件的平均温度、内外壁温差，并将这些参数作为应力场分析的热载荷；将废热锅炉离散为由板壳元和杆单元组成的空间结构，对自重、压力、温度组合的4 种工况进行计算，得到管板、筒体等部件的应力场分布规律。

Numerical analysis was made on magnetic field distribution in working area of magnetic abrasive finishing by the finite difference method,and a kind of arithmetic to calculate the isodynamic was put forward.

利用有限差分的方法对磁极开槽情况下磁力研磨加工区域中的磁场分布进行了数值分析，提出了一种等磁位线的计算绘制算法，得到了加工区域磁场分布的等磁位线图。

The main difference between the proposed method and the existing methods is that the new one embeds objects into the parametric space of the base surface by isometric or locally isometric mapping using the planar development of the base surface as the intermediate medium, thus the object to be deformed can follow the shape of the base surface homogeneously.

新方法中，变形控制曲面首先以等距或局部等距的方式展开为平面，然后经由平面的线性映射，将待变形物体嵌入控制曲面的参数空间中，从而产生符合控制曲面形状的局部均匀变形。

This research concentrates on the optimal factor selection of this modification with Kolmogorov test. The factor is a constant for all tolerance. This optimization method can bring a significant reduction of the difference between variation analysis and tolerance analysis. The thesis presents a framework to model and evaluate assemblies and their assembly process for autobody structure concept design. This framework makes the autobody structure concept design more science-based than experience based, and will significantly enhance the dimensional quality of autobody assemblies.

本文的研究以理论推导、数值模拟为主，结合生产实际数据的对比分析，在前人研究的基础上提出了并行车身结构概念设计方法，将依据经验的车身结构概念设计上升为依据严密数学推理和运算的过程，为进一步提高车身的尺寸质量提供了新的思路，同时对飞机、家电等薄板装配机械产品的设计和质量控制也具有重要的借鉴意义。

In order to decrease the measuring error of signal processing in laser Doppler velocimeter, frequency spectrum correction methods for lacer Doppler signal were proposed. Basic principles of energy centrobaric correction, ratio correction and phase difference correction were expounded. The three methods processing ideal sinusoidal signals was simulated with different signal frequencies, and so was the ratio method processing sinusoidal signals with different noises and signal to noise ratios.

在激光多普勒测速仪中，为了减小由信号处理算法带来的测量误差，提出运用频谱校正算法对多普勒信号的频谱进行校正，详细阐述了能量重心法、比值法和相位差法3种离散频谱校正算法的基本原理，运用这3种算法对理想正弦信号进行仿真，并运用比值法对信号施加不同频率和信噪比的噪音下的正弦信号和实测的多普勒信号进行仿真及实验研究。

In this paper, a kind of SAR image segmentation method based on the criterion of likelihood difference function is proposed.

国防科技大学自动控制系长沙410073中文摘要：提出一种以似然差函数作为相似性衡量标准的SAR图像分割方法。

The exponential method, optimal model, two order linear difference equation model were utilized, and the appraisal and forecast to the water quality of Yangtze River were carried out.

江河之中的污染物在水环境中通过物理降解、化学降解、生物降解等方式可使自身浓度降低，这种能力称为自然净化lj，反映这种能力的指标

A simultaneous dual-wavelength continuous wave, quasi-cw or linearly polarized wave diode-end-pumped Nd:YAG laser operating at 1319nm and 1338nm is demonstrated. To the best of our knowledge, our experimental results achieve the highest level in the domestic domain. The simultaneous dual-wavelength laser provides an experimental basis for generating highly coherent THz wave radiation of 3.23THz by nonlinear optical difference frequency method.2. A diode-end-pumped Nd:YAG crystal, type-I critical phase matching LBO crystal intra-cavity frequency doubled, simultaneous multi-wavelength red laser at 659.5nm, 664nm and 669nm is firstly realized.

本论文主要围绕用于差频产生THz辐射源的多波长激光器及THz光子晶体的带隙特性分析而展开，论文的主要内容包括：一、从LD端面泵浦固体激光器的激光阈值公式出发，理论计算了腔镜对于两个波长的透过率关系，实现了LD端面泵浦Nd：YAG 1319nm/1338nm双波长激光连续、准连续及线偏振稳定输出。

An fluorescence spectral method is proposed to analyze liverish, nephrotic and diabetic sera. The aim is to find difference between serum of healthy human and liver diseases patients in polarization fluorescence spectra.

本论文应用激光光谱技术，对肝病、肾病及糖尿病患者的血清进行光谱分析，试图探讨正常人与病变患者的血清中的代谢产物在光谱上的差异，从分子水平研究细胞病变的可能机制。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。