查询词典 least squares

The contents are: measure and tuning of accelerating cavities, coupling cavities, measure of quality, field distribution, dispersion curve . and the way of measuring and eliminating the stop band, etc. At the same time, utilizing the test data and the dispersion equation of cavity chain, we make a fit dispersion curve by way of least squares fit, and we work out the width of stop band and the intercavernous coupling coefficient.

内容包括：加速腔频率韵测量和调谐、耦合腔频率的测量和调谐、品质因素的测量、场分布的测量、色散曲线的测量、禁带的测量和消除等，同时，论文还从腔链色散方程和测得的实验数据出发，利用最小二乘法进行拟合得到拟合色散曲线，并计算出禁带的大小和腔间耦合系数。

Full vibrational energy spectra {E} and molecular dissociation energies D are studied using conventional least-squares fitting and an algebraic method proposed for some diatomic electronic states of NaK molecules.

应用传统的最小二乘法和作者基于微扰理论建立的代数方法，本文研究并比较了双原子分于NaK的部分电子态的振动能谱和离解能。

Unitary linear regression is done between w~e、 w~ρ、 e~ρ、w_L~w_P. For α_v 、 C_ c between w、ρ、 e、 w_P in eastern China, unitary linear regression is done to silty clay as well as multivariant regression with coefficient iteration method and least-squares procedure are done to all kinds of soil, and the two results are compared. Unitary linear regression and multivariant regression are done to c_q、φ、 c_d、φ_d between e and I_P. Unitary linear regression and multivariant linear regression are done to napierian logarithm of q_u between e 、 I_L、 w_P and w_L, then the equations of regression are checked with other parameters.

对物理指标含水量～孔隙比、含水量～湿密度、孔隙比～湿密度、液限～塑限作了一元线性回归；对华东地区粉质粘土的压缩系数、压缩指数和含水量、湿密度、孔隙比及塑性指数作了一元线性回归；对华东地区所有土类的压缩系数、压缩指数和物理性质参数用系数迭代法和最小二乘法作了多元线性和非线性回归，并对两种方法得到的回归结果作了比较；作了快剪强度指标和固结快剪强度指标关于孔隙比和塑性指数的一元线性回归和多元线性及非线性回归；对无侧限抗压强度的自然对数值和孔隙比、液性指数、液限及塑限作了一元和多元线性回归，并用其它工程的参数对回归方程进行了检验。

A new chemometrics method, which is based on the combination of wavelet transform and Partial Least Squares, is applied to simultaneous determination of Pb2 + and Tl+ mixtures by oscillographic chronopotentiometry.

提出了基于小波分析和偏最小二乘(Partial Least Squares，PLS)基础上的化学计量学方法用于示波计时电位同时测定铅和铊的研究。

The results showed that the 16S rDNA copies of Bacteroides spp. decreased in rotavirus-infected children by 2 orders of magnitudes. 665 clones in Group H and 284 clones in Group R were sequenced and 34 OTUs were obtained according to 98% sequence homology. Partial least squares discriminant analysis of the clone library profiling data revealed significant structural shifts of gut microbiota.

利用偏最小二乘判别法(Partial least squares discriminant analysis，PLS-DA)对这34个OTU进行分析，结果表明轮状病毒感染导致肠道内拟杆菌组成结构发生了变化，通过拟杆菌的组成可以将健康个体与轮状病毒感染个体分开，而对于区分两组个体起关键作用的OTU分别与Bacteroides vulgatus ，Bacteroides stercoris和Bacteroides fragilis有很高的同源性。

Partial least squares prediction model for palmitic acid,palmitoleic acid,stearic acid,oleic acid,linoleic acid in pork had been established with good veracity.

利用偏最小二乘将瘦肉的近红外光谱数据分别与其棕榈酸、棕榈油酸、硬脂酸、油酸、亚油酸含量建立校正模型，并用交互校验和外部检验来考查模型的可靠性。

Digital image process technique is used in pantographic faults monitoring, and a new algorithm named window-edge tracking is proposed in this paper. Based on the binary image of edges which is detected by Canny operator, a window in proper size is set to track the discontinuous edges to estimate the position of the lost edges. With this method continuous edges will be obtained, and continuous and smooth edges will be got after least-squares curve-fitting.

中文摘要：将数字图像处理技术应用于受电弓故障监测，提出一种新型的窗口边缘跟踪算法，在采用Canny算子计算出边缘二值图的基础上，设置适当大小的窗口对初始不连续边缘进行遍历，估计断点处边缘点位置获得连续边缘，并采用最小二乘法拟和出连续平滑的曲线函数。

In general, the main contents and achievements of this paper consist of the following aspects:(1) Based on the characteristics of the transportation and the classic flow-occupancy inverse "V" model, implement polynomial fitting using least-squares algorithm and statistics method on flow curves to detect outliers which are proved to be not accord with practice through the actual implement, then use the moving average model to recorrect the outliers and absent.

本文根据交通领域的流量—时间占有率的倒&V&字型曲线模型，提出了一种基于曲线拟合的交通流异常检测方法，利用三次多项式的最小二乘法拟合流量/时间占有率曲线，并且利用分箱的思想对拟合好曲线上下部分分别采用基于统计的方法划分上下界，有效的识别异常交通流数据。

The major achievement of this paper is: Based on characteristics of the traffic data distribution, execute pattern recognition operations on traffic condition on two dimensions by clustering, then use BP neural network to describe and forecast traffic flow aiming at each pattern. Making use of classic flow-occupancy inverse "V" model, implement polynomial fitting using least-squares algorithm and statistics method on flow curves to detect outliers which are proved to be not accord with practice through the actual implement, then use the moving average model to recorrect the outliers and absent. Make correlation analysis on muti-direction flow queues of the intersection and ones of upriver intersections, choose flow queue with high correlation as assistant one to improve the error tolerance of the prediction system, at the same time we can use the method to give an estimation of flow in intersection with out sensors. We design and implement an SOA(Service-Oriented Architecture)-based UTDD(urban traffic data mining development) with high expansibility and performance, which implement unified management and call of the data-mining application though defining a XML-based description of data-mining process and a common interface to call data-mining process, finally we build traffic flow prediction application model on UTDD.

根据交通流量数据分布的特征，提出基于k-means的二次聚类方法，对交通流量在流量大小和时间上进行模式划分，进而对各个交通流模式进行基于BP神经网络的描述和预测，从而提高模型对流量预测的精度； 2）根据流量/时间占有率倒&V&字形曲线分布模型，提出基于最小二乘法的三次多项式曲线拟合和统计方法的异常检测方法，实际应用表明该方法能够有效识别异常数据，然后根据移动平均算法对异常数据进行修正； 3）基于序列相关性分析，分别对预测方向的交通流量数据序列、上游路口相关序列以及预测路口其它各个方向上的交通流量序列进行分析，选择相似性流量序列，作为辅助序列提供其他没有检测器路口的流量估计； 4）设计和实现了基于SOA（Service-Oriented Achitecture）的高性能、可扩展的智能交通数据挖掘系统UTDD，该系统通过定义基于XML的数据挖掘过程描述和通用的过程模型接口，实现数据挖掘应用的统一管理和调用，最后在UTDD上建立了基于路口流量预测的应用模型。

In the following figures , shade the least number of squares to construct figures with reflectional symmetry .

在以下各图中，把作出反射对称图所需最少数目的正方形涂上阴影，并绘画各对称轴。

In contrast to the ubiquitous rising-sun-with-rays military flag of the Japanese, Chinese banners and ensigns feature a range of designs.

与遍地都是的太阳军旗不同，中国人的旗帜和徽章设计得各式各样。

From their small corner of Feng's Guangzhou headquarters -- a jumble of pink leashes, squeezable rubber steaks, and plastic doggy Santas for Fido's stocking -- Soleil's designers come up with at least five new products a month.

从Feng 设在广州总部的产品展示柜台上可以看到，Soleil的设计师每月至少设计出5件新产品。