Porosity test in carbon composites based on a new ultrasonic attenuation method;
碳纤维复合材料孔隙率超声衰减测试研究
Quantitative measurement of ceramic uranium dioxide porosity and pore distribution;
陶瓷UO_2孔隙率与孔隙分布的定量测量
An experimental study on the porosity measurement of medium and high consistency pulp;
中高浓纸浆孔隙率测定的研究
A new method based on pulse echo method was proposed for nondestructive testing of void content of carbon fibre reinforced composite material.
用超声反射法对碳纤维复合材料试块进行孔隙含量检测,探讨基于超声反射波频谱分析理论建模与实验标定的碳纤维复合材料孔隙率测试方法。
Aiming at the test of void content of carbon-fiber reinforced composite used in aeronautic industry, developed a portable ultrasonic non-destructive test system.
针对航空工业碳纤维复合材料板材的孔隙率检测,研制了便携式超声无损检测系统。
The attenuation coefficient shows approximately linear behaviour with frequency over the frequency range used,and the attenuation slope increases with the void content.
结果表明:超声衰减系数与频率之间存在线性关系,而且其斜率随孔隙率的增大而增大。
A mix proportion design method of pervious concrete is provided,of which total void ratio is the first design parameter and compressive strength is the second one.
根据透水混凝土的结构特征,对其配制参数和配合比计算方法进行了研究,提出了以总孔隙率为第一设计参数,抗压强度为第二参数的配合比设计方法。
The methods for testing density of asphalt macadam with large void ratio are analyzed,the defect of wax sealing method and volume method are also discussed,these two methods were just the ones recommended by specifications for testing bulk density of asphalt macadam,and the method of wax sealing is modified.
分析结果表明,蜡封法计算的孔隙率平均值为5。
The influences of the void ratio, the bulk modulus, the permeability coefficient to the longitudinal and transverse wave velocity are studied.
基于饱和多孔介质波动理论平面波解,分析了频率对纵、横波速度和衰减的影响以及孔隙率、体积模量、渗透系数等参数对纵、横波速度的影响,得出了波速、衰减具有频散的特性及孔隙率是影响冻土波速的主要因素等结论,据此分析了冻土超声波测试中存在的动力学特性规律不明显的原因,并提出了改进建议。
The relationships between foam porosities and the processing parameters are studied.
采用粉末致密化发泡(PCF)工艺制备泡沫铁,研究了各工艺参数对泡沫铁制备及其孔隙率的影响规律,得出了实验条件下的优化工艺参数配置,对制备过程及影响孔隙率的因素进行了分析,获得了泡沫铁的优化制备工艺及各工艺参数对孔隙率的影响规律,对泡沫铁的研究与开发具有显著意义。
It analyzes influencing of fly-ash to durability of concrete from alkali aggregate effect、pore ratio、free shrinkage、crack-resistant under constraint condition,it indicates it is important influencing factor that delay service life of concrete when ensure durability of concrete.
从碱集料反应、孔隙率、自由收缩、约束条件下抵抗开裂、混凝土强度等方面系统地分析了粉煤灰对混凝土耐久性的影响,表明了保证混凝土的耐久性是延长混凝土寿命的重要因素之一。
The compressive modulus,which characterizes the deformation behaviors of loose rock blocks under confining constraint,is related with many factors,such as the pore ratio,rock strength and so on.
通过对松散岩块进一步的压实试验研究,得出了松散岩块的侧限压缩模量与孔隙率及岩块抗压强度之间的关系。
Preparation of porous Al with high porosity by infiltration method;
渗流法制备高孔隙率多孔铝
The porous ceramic filtration materials with high porosity were fabricated by using floating beads as the aggregate and millet/polystyrene pellet and carbon powder as the pore-forming agent.
43 %的高孔隙率多孔陶瓷滤料。
Research on accurate measurement method of porosity of macropore sample
公路工程大孔隙试件孔隙率精确测定方法研究
Investigations on CFRP Porosity Using Ultrasonic Testing Based on Random Pores Model
基于随机孔隙模型的CFRP孔隙率超声检测研究
Internal friction behaviors of porous NiTi alloys with variable porosities
可变孔隙率多孔NiTi合金的内耗行为
The ratio of the volume of all the pores in a material to the volume of the whole.
孔隙率一材料中孔隙的总体积与整个材料的体积之间的比率
It is the porosity due to interconnected pores that can be filled with and emptied of water.
这种孔隙率是水可流出和流入的连通空隙。
Metallic coatings--Review of porosity tests
GB/T17720-1999金属覆盖层孔隙率试验评述
Seismic velocity can occasionally be affected by porosity and temperature.
孔隙率和温度有时也能影响地震波速。
The study result was verified by porosity testing.
分析结论通过孔隙率检验得以证实。
Research on Ultrasonic Methods for Porosity Measurement
复合材料孔隙率的超声检测方法探讨
Influence of Adscititious Materials on the Porosity of Cement Concrete
外加材料对水泥混凝土孔隙率的影响
PRELIMINARY RESULTS ON RELATIONSHIP BETWEEN THERMAL DIFFUSIVITY AND POROSITY OF SEA ICE IN THE ANTARCTIC
南极海冰导温系数与孔隙率关系初探
Comparison of Porosity Detection Method of the Composites
复合材料孔隙率检测方法的比较研究
Theoretical Research and Verification of the Porosity of Semi-fixed Abrasive Tools
半固着磨具孔隙率的理论分析及验证
EFFECT OF POROUS PREFORMS ON POROSITY OF PREPARED TiC/Ni_3Al COMPOSITES
多孔预制件对TiC/Ni_3Al复合材料孔隙率的影响
Rising temperature of casting solution will increase the water flux, porosity and average pore size of PVDF membrane.
制膜液温度升高，得到微孔膜的孔隙率、通量及平均孔径都增大。
The electrographic test method of plating porosity for printed boards
GB/T4677.9-1984印制板镀层孔隙率电图象测试方法
Metallic coatings--Porosity tests--Ferroxyl test
GB/T17721-1999金属覆盖层孔隙率试验铁试剂试验
Metallic foams are new engineering marerials with high porosity.
金属泡津材料是一种高孔隙率的新的工程材料。