查询词典 least squares approximation

The squares and young bolls of cotton were rather sen-sitive to ethylene, the percentage of squares and bolls abscised being higher withhigher concentration and longer duration of fumigation while cotton bolls of ageslonger than 16 days were resist...

棉花的蕾及幼铃对乙烯比较敏感，脱落率随乙烯浓度的增大及熏气时间的延长而增长，日令16天以上的棉铃对乙烯抗性强。

From meditating the design status of our country'S large-scale square and neatening,analyzing and summarizing large amount of examples and investigated data,this paper introspects on urban squares in contemporary China mainly from three aspects.Firstly,it analyses the develop process and the present state;secondlv.it pays attention to the questions of urban squares as public space;thirdly,it gives a preliminary discussion on its premise and trends in the future.

本文即从反思我国当代城市广场的设计现状出发，通过对大量实例、调研资料的整理、剖析与理论总结，从三个方面对我国当代城市广场建设进行了深入思考：一是分析当代城市广场发展脉络及当下状况；二是在这样的脉络下探讨近年来中国这些新兴的广场作为公共空间所呈现出的问题；三是试图提出突破困境的可能，进一步探讨未来城市广场的发展前提与趋势。

There are more than 50 public squares scattered all over Dalian city, which has most squares in China.

大连现有较大的广场50多个，是中国广场最多的城市。

Based on the theory of environment behavior and psychology, considering user"s behavior and psychological need, the investigation scope including 2 representative urban recreation-squares and 3 pleasances, this thesis studied different users, user"s behavior, and usage quantity at different times. The results showed that there are many problems in recreation-squares of Taiyuan city, and region location, space subarea, edge effect and participation effect are main effect factors. On this basis, some optimizing design and strategy are put forward.

本文主要以环境行为学和环境心理学为理论基础，以城市公共空间使用者的行为特点和心理需求为出发点，以太原市为研究范围，通过详细调查太原市具有代表性和典型性的2个广场、3个小游园，对其使用人群、使用者行为活动、不同时间使用者数量等方面进行研究，总结出太原市公共空间中普通存在的问题，提出区位位置、空间场地分区、边界效应、可参与性效应等是影响公共空间的主要因素，并针对发现的问题，提出了改进和优化设计的建议和对策。

Like the central nave, the north was apparently decorated with one continuous panel. To the east, this gave way to a small design of crosses and squares. Enclosed in rectilinear edges, the panel showed a design of interlocked octagons, which, in turn. formed squares. hexagons and triangles. At some unknown date, this panel of white, black and red cubes was damaged by a crack which was repaired with white cubes.

像中殿一样，北边的长廊是由一个连续的窗格所装饰，直到东面才变为一个小的十字和方形的设计，并逐渐在边缘被密封，窗格由一连串的八角形设计，形成了方形、六角形和三角形，不知道在什麼时候，这些窗格的白色、黑色和红色的镶嵌块被损坏，这个裂缝被一个白色的镶块的修复。

Four thin-layer drying models were investigated for the description of FIR-assisted freeze-drying characteristics. The models were exponential model, Page model, diffusion model, and approximation of the diffusion model. Tests were conducted using a three-level, three-factor (drying temperature, distance between sample and FIR heater, and sample thickness) design, and quadratic polynomial analyses were performed to relate the drying parameters of thin-layer drying model. The performance of these thin-layer drying models was evaluated by comparing the coefficient of correlation (R2), the sum of squares, and the RMSE amongst four models. Drying parameter K of the Page model gave the best results in describing freeze-drying with FIR of Tylose and sweet potato.

运用四种薄层乾燥模型（指数、Page、渗透模型及近似渗透模型）研究远红外线冷冻乾燥之乾燥特性，实验采用三阶层、三因子（远红外线加热器设定温度、远红外线加热器至样品表面之距离及样品之厚度）的实验设计，对於薄层乾燥模型的乾燥参数以二次多项式函数表示之，乾燥参数之二次多项式函数的最适性判断主要是藉由决定系数、模式缺乏适合性及均方根误差等值的比较而加以评估，以Tylose及甘薯样品而言，其中四种薄层乾燥模型的乾燥参数以Page模型之K值的结果为最佳。

This paper presents a method of iteration for least absolute deviation regression,which uses weighted least squares methods.

利用加权最小二乘法，提出最小一乘的一种迭代算法，这种方法使最小一乘法在计算上变得简单、直

Based on Hankel's matrix method and augmented least square recursive algorithm,the paper features the recursive least squares method of nonlinear parameter estimation with forgetting factor by introducing the constraint indicator of ...

依据Hankel矩阵法，在参数估计准则函数中加入待估参数的增量约束项和遗忘因子，并结合增广最小二乘递推算法，提出一种具有遗忘因子的非线性参数估计的递推最小二乘法。

By means of analyzing the noise error, it is proposed to use an algorithm of singular value decomposition total least squares to conduct the interharmonics estimation, namely taking the noise interference at both sides of the matrix equation into account simultaneously and solving the minimum norm problem by least square method under such condition. In the proposed algorithm by means of singular value decomposition of a new augmented matrix and by use of a simple and practical method to determine the number of principal singular value related to signal to noise ratio, the storage calculation of right singular matrix is performed, thus a more accurate frequency estimation of interharmonics can be obtained.

通过分析噪声误差，提出采用奇异值总体最小二乘(singular value decomposition total least squares，SVDTLS)算法进行间谐波频率估计，即同时考虑矩阵方程两边的噪声干扰，采用SVDTLS算法求解该情况下的最小范数解，通过对增广矩阵进行奇异值分解(singular value decomposition，SVD)，采用简单实用的与信噪比相关的主奇异值个数确定方法对分解的右奇异矩阵进行存储计算，得到了较精确的间谐波频率估计结果。

The algorithm consists of a least-squares part providing an analytica l initial solution,and a projection part that projects the initial least-square s solution successively onto each equality constraint.

该算法有两个显著特点：一是目标函数的Hessian矩阵不要求正定；二是由于采用平方根因子分解来计算增广Hessian矩阵及投影算子矩阵，算法具有很好的数字稳定性。

Diabetes is a social disease that affects several million people worldwide.

糖尿病是一个社会性疾病，全世界有数百万人罹患此病。

I'll call you on Friday to see if we can reschedule our luncheon meeting at your convenience.

我星期五会给您打电话在您方便的时候我们重新安排我们的午餐约会。