查询词典 sparsity

Traditional morphological studies have resulted in few solid conclusions regarding the monophyly and systematic position of Myriapoda within Arthropoda; the origin and evolutionary history of Myriapoda are also veiled by the sparsity of the group's fossil record.

基于表型性状的系统学研究中，多足动物亚门在节肢动物门中的系统分类和单系性等问题一直存在争议；化石记录的稀少又使多足动物的起源及演化历史变得迷雾重重。

Sparse eigenvalue analysis technique, which makes full use of sparsity of augmented state matrix during small disturbance stability analysis for large scale power system, can compute out concerned eigenvalue subset from all eigenvalues and can analysis power systems that have arbitrary scales.

论文的主要研究工作和创新性成果如下：1针对传统特征值分析方法仅适用于中小规模电力系统的局限性，结合Prony和稀疏特征值算法，提出了一种大规模互联电网区间低频振荡分析的实用方法。

Considering his England prospects, Beattie admits he is frustrated by the sparsity of his opportunities.

谈及他的英格兰国家队前途问题，比蒂吐露他在国家队鲜有表现的机会。

Discussions of the sparsity and condition number of the expansion matrix are presented.

本文还对一般线性积分算子在正交小波基下的展开进行了讨论。

Data set size, dimensionality and sparsity have been identified as aspects that make cluster more difficult.

数据集合的大小，数据的维数和数据的稀疏性都是制约聚类的不同方面。

Thereby, sparsity of the Hessian matrix of the objective function is maintained by the approximate updated matrix sequence.

此算法的另一个重要性质是：算法产生的逼近目标函数Hessian阵的矩阵序列保持对称正定性。

For the sparsity of small cell carcinoma of the hypopharynx, this case herein is stated.

因下咽部小细胞癌之病例实属罕见，特提出此报告。

However, the sparsity of the observational points used in the refraction method due to the restrictions imposed by the surface hypsography of the area-- one point per kilometre-- makes it possible only to give relatively accurate data for base rock velocities, but not for morphologic structure configurations.

但是，小折射方法受地表的地形起伏因素影响比较大，且观测密度也不够，每公里只有一个点，所以在该区只能较准确地给出基岩的速度信息，而无法准确地获得基岩的形态起伏数据。

The forth algorithm is the same as the third one with an addition of finite termination criteria. Although the latter two algorithms have only linear rate of convergence, they are especially suitable for large-scale and sparse problems, with features of simple formula, small storage, sparsity preservation and easy implementation.

前者借助NCP函数把互补问题转化为等价的非光滑方程组，再用带参数的光滑方程组近似这些非光滑方程组，最后用牛顿型方法求解所得到的光滑方程组，希望通过光滑参数趋于零得到原来互补问题的解；后者基于等价不动点格式，构造了一个光滑迭代算法和一个具有有限终止性质的算法，虽然这种迭代算法仅有线性收敛速度，但由于其格式简单、存储量小、保稀疏性、非常易于计算机实现等特点，故较适用于求解大规模稀疏问题。

The sparsity is a law of the human social development, the promotion of the theory of labor value needs to reflect the sparsity.

稀少性是人类社会发展的一条规律，劳动价值论的深化认识需要反映稀少性。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。