查询词典 falling gradient

This minimum is computed with the calculus of variations and the gradient descent method, which provide a system of evolution equations solved with the well-known level set method.

能量泛函的极小值由变分法求解，利用梯度下降法和水平集方法推倒演化方程。

Result: Rhesus BMSC can be got in mass by density gradient centrifugation.; Rhesus BMSC can adhere to PLGA fiber quickly after plant and its growth , division ,proliferration is good; Some cells arrange like rosary on PLGA fiber surface, some cells still form the catenate or flaky cell bridge joined among PLGA fiber.

结果：采用密度梯度离心的方法可得到大量增殖能力强的猕猴骨髓基质干细胞；接种后的骨髓基质干细胞很快粘附于PLGA纤维上，生长、分裂、增殖良好，在PLGA纤维表面形成串珠样排列，部分细胞还形成连接在PLGA纤维间的链状或片状细胞桥。

7 A porous medium has a permeability of one darcy when a single phase fluid of one centipoise viscosity that completely fills the voids of the medium, will flow through it under conditions of viscous flow at a rate of one cubic centimeter per second per square centimeter cross sectional area under a pressure or equivalent hydraulic gradient of one atmosphere per centimeter.

答案：当粘度为 1 厘泊的单相流体被完全充满-多孔介质的孔隙时，在粘滞性流体以 1 立方厘米每秒或每平方厘米的相当于每厘米一个大气压的水力梯度通过时，该介质的渗透率为 1 达西。

Compared with the density gradient centrifugation method, this protocol was time-saving and low cost and high efficiency.

本研究建立的方法与通常采用的密度梯度离心法相比，具有耗时短、对离心机的要求不高，且所提取的mtDNA产率高、结构完整等特点。

Among them,CsCl density gradient centrifugation is often used,because product purity is good by this method.

在纯化病毒的方法中，氯化铯密度梯度离心法是较为常用的方法之一，方法简便易行，获得的病毒样品较纯。

Methods: Mononuclear cells were obtained from human peripheral blood by the method of Ficoll-Hypaque density gradient centrifugation.

目的：观察白藜芦醇对人外周血单核/巨噬细胞CC型趋化因子受体5(CCR5)表达的调节作用。

RESULTS: Higher purity of human BMSCs could be achieved by the density gradient centrifugation.

结果：密度梯度离心结合贴壁法能分离培养出纯度较高的人骨髓间充质干细胞。

Results 96% cells were alive after density gradient centrifugation.

结果 经密度梯度离心后，活细胞比例在96%以上。

BACKGROUND: There are many in vitro selection method of sperm, and swim-up and density gradient centrifugation are commonly used.

摘要背景：精子体外优选方法很多，最常见的是上游法和密度梯度离心法。

Methods The hMSC were obtained from bone marrow specimens by gradient centrifugation method.

目的研究人骨髓基质细胞体外培养及向成骨细胞诱导分化的实验方法。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？