查询词典 sparse

Statistical significance can not be found between 24hours and 48 hours.. Under an inverted microscope , we can observed the cells adherent, fullness, polygon in control group, the cells amout sparse, suspended, quasi-round, and no refractional nature in experiment groups, the highter the concentration is, the greater themorphological change of cells will become.

形态学分析，在倒置显微镜下可见，经药物作用后MCF-7细胞数目减少，细胞形态由原来的贴壁良好、饱满、多角形、梭形变为类圆形、悬浮、颜色变暗、无折光性，且随药物浓度的增加细胞形态变化越大。2。

If the step of the linear system question is not very high, direct solving method is better; if coefficient matrix of the linear system question is not regular and large-sparse matrix , direct solving method does not settle the storage question.

而在求解线性方程组的许多实际问题中，尤其在偏微分方程的差分方法与有限元方法求解问题之中，方程具有重要的特征，一是多为大型稀疏矩阵；二是满足一些条件如对称正定、对角占优等，这使迭代法得到广泛的应用。

The method includes the following steps: firstly, a spherical neighborhood of present sample points is established by using the geometric spherical-modelling theory and all the sample points contained in the spherical neighborhood are adopted as candidate neighbor points, thus not only preserving the effectivity of the dimension reduction capability when data sets are sparse but also getting the advantages of low-sensitivity to isolated points and good stability of the preserved topological structure; then a data relevance matrix more matching semantics can be obtained by relevance measurement based on route clusters to update the candidate neighbor points in the spherical neighborhood and optimize the regular neighborhood space of the present sample points, thus improving the phenomenon that the dimension reduction of sample sets provided with folded curved faces is apt to suffer the integrated-structure distortion in case of heterogeneous data distribution.

首先利用几何开球原理建立当前样本点的球状邻域，将包含在球状邻域内的所有样本点作为候选近邻点，不但能够保持在数据集稀疏情况下的降维性能的有效性，而且具有对孤立点敏感性不高、保留拓扑结构稳定性好的优点。然后利用基于路径聚类的相关性度量得到更符合语义的数据相关性矩阵，用来对球状邻域内的候选近邻点进行更新，优化当前样本点的规则邻域空间，改善了当数据不均匀分布时在带有折叠弯曲面的样本集上降维容易出现整体结构扭曲的现象。

Aerial image can be computed fairly fast by this method compared with the rigorous solution of the Hopkins equation, especially for the situation of many sparse aerial points which is often met in OPC application.

一个双线性光学系统分解成为一组空间域卷积核，并通过对版图的空间域卷积来计算空间光强。与采用Hopkins公式的SPLAT相比，这种方法能快速地计算空间光强。尤其对于大面积计算显得更为有效。

All measured heavy metal concentrations in roadside soils of Beiyan road,which had sparse protection forest,decreased exponentially with the increase of distance from the road; the maximum heavy metal value appeared within the distance of 15 m from Beiyan road.

公路防护林体系较差的北沿公路路侧土壤纵向剖面重金属含量随距路肩距离增加呈指数下降，土壤重金属重污染区在距路肩15 m范围内。

They had typical appearance features of Laron syndrome such as short stature and obesity, with protruding forehead, saddle nose, large eyes, sparse and thin silky hair and high-pitched voice.

他们出生体重和身长无特殊，自生后出现生长落后，身高明显落后于同龄正常儿童，并均呈现了典型Laron 综合征外貌特征：身材矮、肥胖、前额突出、大眼睛、塌鼻梁、头发稀软。

The sediment of flourish salt marsh was thinness than that of sparse salt marsh.

人类活动在改变盐沼植物特征的同时也会改变沉积物粒径的空间分异。

For the BM-rice,the sclerenchyma of leaves was shrunken,vascular bundle of leaves was reduced,the strumae of outer epidermis of stem was sparse and the link of phloem of root was loosed and dispersed.

2通过扫描电镜观察，脆性突变水稻的组织结构发生了较大变化：叶片薄壁组织扩张，厚壁组织收缩，维管束数目减少；茎杆外表皮硅质瘤状结构分布稀疏；根中柱韧皮部组织排列稀疏，连接松散。

Eigenvalue matrix for resolving sparse polynomial equations is constructed by deploying well arranged basis in semigroup algebra k.

本文利用半群代数k中良序基，构造了求稀疏多项式方程组解的特征值矩阵，并给出了可以构造方阵的条件。

Surface erosion occurs mainly in farmland, sparse grassland and woodland, is the rainfall and runoff erosion on the surface is relatively uniform, including the raindrop erosion, sheet erosion and rill erosion .

面蚀主要发生在坡耕地、稀疏牧草地和林地，是降水和径流对地表相对均匀的侵蚀方式，包括雨滴侵蚀、片蚀和细沟侵蚀。

Don not attempt to do something which you can not to do.

不要企图做那些办不到的事情。

The expression of CTGF and TNF-αweredetected by immunochemistry and the number of Clara Cells was calculated.

光镜下观察肺组织的病理变化，采用免疫组化染色观察肺组织中结缔组织生长因子和肿瘤坏死因子-α的表达和Clara细胞的数量。