查询词典 porous

In order to find out an accurate and practical soil water movement simulation method for infiltration irrigation management, in this paper, investigations of field subirrigation using a rubber-based porous pipe were carried out, and Green-Ampt Model and Philip Method for solving one-dimensional Richard Equation were used respectively to simulate the soil water movement in perpendicular and horizontal directions.

为了寻找一种准确实用的土壤水分运动模拟方法用于指导田间渗灌，该文对一种橡塑渗灌管田间渗灌过程进行监测，并采用Green-Ampt积水入渗模型和一维水平吸渗模型Philip解法分别对渗灌过程中土壤水分在垂直和水平方向的运动进行模拟，通过与田间实测值对比，检验模型的适用性。

The membrane provided by the invention has the more compact cortex structure without defection and porous sublayer structure.

该膜具有无缺陷、较致密的皮层结构和多孔的亚层结构。

Yellow River sullage porous brick can substitute for clay brick and be used as bearing wall material based on analysis of masonry compression strength,crack development and breakage feature.

从砌体抗压强度、裂缝开展以及破坏特征等方面分析，黄河淤泥多孔砖可以替代黏土砖用作承重墙材。

Test and application of active and porous agent in the production of single superphosphate were introduced.

介绍了在过磷酸钙中添加活化疏松剂的试验情况及运用效果。

Mathematically, the miscible displacement of one fluid by another in a porous media is governed by a nonlinear coupled system of two partial differential equations, one of elliptic form for the pressure and the other of parabolic form for the concentration of one of the fluids.

数学上，多孔介质中一种不可压流体对另一不可压流体的相溶驱动由两个耦合的非线性偏微分方程描述。其中一个是关于压力的椭圆方程，另一个是关于浓度的抛物方程。

Using Charent's pressure variable, two-phase, incompressible, immiscible flow in porous media is governed by a system of coupling nonlinear partial differential equations.

引入Charent压力变量，对于多孔介质中两相不可压缩流体的非混溶驱动问题，其模型表现为耦合的非线性偏微分方程组，一个是压力方程，另一个为饱和度方程。

The anion of tungstotantalate was synthesized for the first time as K_9TaW_(11)O_(40)·15H_2O by the reaction of soluble potassium tantalate and porous white tungstic acid in aqueous solution.

在五氧化二钽基体中加五氧化二铌配成标准溶液，与氟钽酸钾样品在相同条件下经系列处理后进行纸上色层分离，分离后与样品直接进行目视比色。

Uncooled infrared detector; Vanadium oxide films; temperature coefficient of resistance; the finite Element Method; porous silicon

信息科技，无线电电子学，光电子技术、激光技术非制冷红外探测器；氧化钒薄膜；电阻温度系数；有限元法；多孔硅

The porous SiO2 xerogels with controlled structure were obtained from TEOS in the presence of PEG by sol-gel method.

采用溶胶-凝胶法，以正硅酸乙酯为前驱体，以不同分子量的聚乙二醇为改性剂，制备结构可控的多孔SiO2干凝胶。

It has demonstrated that the template method could remarkably control the size of porous carbons by simply controlling the hydrolysis of TEOS.

表明通过控制正硅酸乙酯的水解条件能制备孔径集中的中孔炭材料。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。