查询词典 vector basis

The properties of the basis functions, such as the weighting property, positivity, symmetry and endpoints' properties,are similar with those of the n degree Bernstein basis functions,and the generated curves are similar with the n degree Bézier curves.

基函数的权性、非负性、对称性、端点性质等均与n次Bernstein基函数类似；生成曲线也具有与n次Bézier曲线类似的几何性质。

First, a non-negative tensor factorization algorithm is improved by imposing sparseness constraints on it. Secondly, the bispectral images of mechanical signals are obtained and stacked to form a third-order tensor. Thirdly, the improved algorithm is used to extract features, which are represented by a series of basis images from this tensor. Finally, coefficients indicating these basis images' weights in constituting original bispectral images are calculated for fault classification.

首先，改进已有的非负张量分解算法，加入稀疏度控制策略；其次，将机械振动信号的双谱图像堆叠为一个三阶张量；然后利用改进后的分解算法对该张量进行二次故障特征提取，得到代表局部特征的"基图像"；最后，通过计算得出基图像在构成原双谱图像中所占的权重，并将得到的权重向量用于故障分类。

Next, we construct a group of unitary basis on, and form the unitary basis on by tensor product.

我们构造M_2上的酉基，并用张量积方法构造M_(2~n)上的酉基。

The 46 ears classify into three groups on the basis of hearing threshold level,and classified into four groups on the basis of different disorders.Results The amplitude and reproducilbiity decreased as the hearing loss increased.

选择经耳镜检查、纯音听阈及声导抗测试确诊为中耳病变，纯音气导听阈不超过30 dB HL的46只病变耳及对照组正常28耳进行TEOAE测试，病变46耳分别按不同听阈水平及不同病变分组，并对其结果进行分析比较。

Methods 38 cases with tibiofibula open fracture, with earlier debridement thoroughly, on the basis of the Gustilo typing of open fracture, the fixation procedure was Selected with reamed or undreamed intramedullary nailing; On the basis of the serious degree of soft tissue injury and wound tonus bulk, the time for closure of the wound was determined.

38例开放性骨折，早期彻底清创、按开放性骨折Custilo分组选择扩髓或非扩髓型交锁髓内钉固定方法，根据软组织损伤严重程度和创口张力大小确定是否延期闭合伤口。

A had given another new form of curve, which is constructed by a new totally positive basis (DP-NTP basis). This kind of curve shows obvious advantage in computing, for the reason that it has linear complexity. Meanwhile, it has good shape preserving property. But regretfully it is not locally adjustable as how B-spline curves do.

a提出了另一类用标准全正基构造的新曲线表示形式，这种曲线在求值运算中具有线性时间复杂度的明显优势，同时像B样条曲线那样具有模拟或保持控制多边形形状的保形性质，但没有形状局部可调性。

On the basis of this study, we can find that, concerning transitivity, the choice of main verbs of processes is the basis of translation and the best way to arrive at equivalence in meaning and function between the source text and target text.

本项研究发现，在处理及物性结构时，过程主要动词的选择是翻译的根基，是达到语义功能等效的最佳途径。

The following results are made from this research: Assessing data quality and band combination of different bands in line with geo-target features in desertification areas, and determining basic bands for desertification monitoring. And understanding and studying the spectral features and variation rules of geo-targets in the experimental area, raising that it is the basis of geo-targets information collection with imaging spectrometer data to understand spectral features and variation rules of geo-targets, realizing that in a great extent spectral-integrated-form-based classification method can remove the phenomenon of "different spectrum with same objects" resulted from reflection ratio curve translation because of the angle change among sensor, targets and observation direction, and the average and variance images can be introduced to solve the problem of two kinds of geo-target with similar spectral forms and much different values of whole reflectionratio. It is suggested that "red edge" range bands of vegetation, which has close relationship with vegetation cover and biomass, is the main characteristic bands and important basis for careful vegetation classification and quantitative retrieval, and pixel-based derivative spectral analysis is very useful for removing the effects of soil background values and quantitatively retrieving vegetation biomass and cover. The remote sense quantitative retrieval model is developed for main appraisable factors of desertification monitoring assessment with imaging spectrometer data and then the applicability of model is analyzed.

研究结果如下：首先针对荒漠化地区的地物特征，对高光谱数据不同波段的数据质量、波段组合进行了评价，提出了适用于荒漠化监测的基本波段选择集；初步了解和掌握了研究地区的地物光谱特性及变异规律，进一步明确了掌握地物光谱特征和变异规律是用成像光谱仪数据提取地物信息的基础；发现了基于光谱整体形状的分类方法在很大程度上能够消除由于传感器、地物目标观测方向之间的角度变化引起的反射率曲线整体平移的"同物异谱"现象，对于谱形相似而整体反射率的值相差较大的两类地物，通过引入均值和方差图像参与分类得到解决；研究还表明在植被"红边"范围内的波段是进行荒漠化监测的主要特征波段，这些波段与植被生物量和盖度都有密切的关系，是开展精细植被分类研究和植被定量反演的重要基础；像元的导数光谱分析可以消除土壤背景的影响，是进行植被生物量和盖度定量反演的有力工具；建立了荒漠化监测主要评价因子的定量反演模型，并分析了模型的适用性。

The traditional ways are to map on the basis of travelling wave reduction, i.e., on the basis of ordinary differential equations.

传统的方法是在行波约化的前提下，即在常微分方程下进行映射。

The operation condition of a series-resonant converter is equivalently analyzed under open-loop condition. OCC condition and selection basis of resonant parameter and switching frequency are determined. The relationships between LED number, transformer turns ratio and constant current error are also determined, which provide scientific basis for the selection of LED number and transformer turns ratio.

文中通过对串联谐振变换器开环工作状态的等效分析，确定开环恒流条件和谐振参数与开关频率的选择依据，以及LED数目、变压器变比与恒流误差之间的关系，为LED数目及变压器变比的优化选择奠定了理论基础。

The studies on the developing of new media are very important to the increasing of the area density of HDD and to the implementation of hybrid recoding technology.

光磁混合记录方法，是一种可以突破超顺磁极限的限制，并进一步提高硬盘记录密度和读写速率的一种新型超高密度信息存储方式。

In io, mTOR inhibition promotes T cell anergy under conditions that would normally induce priming.

体内研究中，在正常可激发免疫反应的条件下，抑制mTOR可促使T细胞无能。