透气率

织物的面密度和厚度减小，透气率增大，单层和多层TPP值也减小。

The areal density and thickness decreased , while the air permeability increased .

并对该敷料的外观、表面结构、单位体积质量、透气率、吸水能力、抗撕强度、pH值、炽灼残渣测定等理化性能进行了检测和分析。

The appearance , surface structure , mass per unit volume , air permeability , water absorptivity , tensile strength , pH value and remains after burn were measured .

对基于干法MPL和湿法MPL的气体扩散层（GDL）分别进行了表征，包括扫描电子显微镜法（SEM）、透气率以及表面接触角。

The surface morphology , hydrophobic characteristic of the surface and gas permeability of the GDLs with dry-layer MPL and wet-layer MPL were characterized .

拉伸工艺对膜的结构和性能也有很大的影响，随着拉伸速率和拉伸比率的增加，PE中空纤维膜的透气率和孔隙率均增加。

Stretching process also had great effects on the microporous structure of PE hollow fiber membranes , it was indicated that the N2 permeation and porosity of the membranes both increased with the increases of stretching rate and ratio .

采用亲水性的聚乙二醇为添加剂，可以有效改善涂层织物的透湿性，随着PEG分子量的增加，涂层织物的滤尘性呈下降趋势，但透湿量和透气率增加。

When hydrophilic additives such as polyethylene glycol ( PEG ) was used , the moisture permeability of coated fabrics is improved . With the increase of PEG molecular weight , dust filtration of coated fabrics turned to lower , while moisture permeability and air permeability were increased .

采用动态平衡模型方程，通过研究不同温度（5℃、25℃）、包装内不同氧浓度（0%-21%）条件下的番茄呼吸速率、LDPE膜透气率，预测了包装量。

Based on the dynamic equilibrium equations , packaging weights were predicted by studying the respiration rates of fresh tomato fruits and the permeability of LDPE film under the conditions of different temperatures ( 5 ℃ , 25 ℃) and different oxygen concentrations ( 0 % - 21 % ) .

基于激波管实验的空气袋织物透气率的测试研究

Measurement of the Permeability of Airbag Fabrics Based on Shock Tube Experiment

组培封口材料透气率的测定与计算

Calculation and measurement of aerated rate of seal materials for plant tissue culture

木片料床透气率与含水率和密度的关系

The relationship among the air permeability moisture content and density of chip bed

高透气率的填埋场有较高的气体消散速率。

The landfill with a high permeability has a high rate of pore gas pressure dispersing .

提出一种基于激波管实验和理论的空气袋织物透气率的测试方法。

A method based on the shock tube experiment is proposed for measuring the permeability of airbag fabrics .

组培容器封口材料的透气率对组培微环境和组培苗具有重要影响。

The aerated rate of seal materials makes an important effect on the micro-environment and plantlets of tissue culture .

根据安全气囊织物需求的增长及其发展动向，设计研制了非涂层、缝制型和全成形型新型安全气囊织物，通过囊身两层织物的不同结构，达到织物透气率不同的目的。

New type fully fashioned safety gas cell fabric free from coating is developed by sewing in order to meet its ever growing market demands .

通过实验，对杨木、桦木、椴木和榆木四种树种的木片散堆料床，在不同含水率及堆密度条件下的透气率作了研究。

Air permeabilities of four kinds of wood chip aggregates of different species such as poplar , birch , basswood and elm were experimentally studied .

运用差分法求解的结果表明，填埋场垃圾体内孔隙气压与深度、时间和透气率等因素有关。

The result of the finite difference solution represented that the pore gas pressure in the landfill was influenced by the depth , time and permeability .

为有效地提高包装膜的透气率，基于原包装膜而进行后加工制孔是近年来采用的主要技术手段之一。

For effectively enhancing the gas permeability rate of the packaging film , one of main technical methods is to make holes on the original package film .

概括了影响土壤气体抽排净化技术净化时间的主要因素，包括土壤透气率、含水率、有机污染物气体饱和蒸气压、抽排流速、环境温度；

Major factors that influence remediation time of SVE , including air permeability , water saturation , vapor pressure , air flow rates and environmental temperature were described .

针对国内塑料薄膜透气率测定仪器依赖进口的现状，设计本系统。

Aiming at the actuality that the instrument used to mensurate the permeability of plastic film depends on import , this paper introduces the design of the mensurate system .

此产品具有防静电功能好、抽真空效果佳、透明度高、透气率低、防潮性能好、抗拉强度与耐穿刺强度高、易热封、密封性好、不易老化等特点。

It could be firmly hot sealed and strongly laminated between different layers of material ; four cornered solid construction make it also has good function of resistance of the water and oxygen .

经过正交优化试验及直观分析，对于结构疏密程度不同的滤料，分别得出可以使其透气率最小、拒水等级和拒油等级最高的最优工艺参数。

By orthogonal tests and intuitive analysis , the optimum processes , which can give the optimum ventilation property , water-repellent and oil-repellent for filter materials with different structures , are concluded respectively .

湿型砂三性能快速测定仪，可在1分30秒内完成紧实率，湿压强度和透气率的测定，适用于湿型砂的在线快速检测。

The rapid tester was described for measuring three properties of green molding sand such as compactibility , green compression strength and permeability within 90s , it is suitable fo rapid determination of green molding sand in production line .

同时还得出了温度对薄膜透气率以及青菜呼吸速度的影响规律，并建立了青菜的呼吸速度与O2浓度之间的数学模型。

The influence disciplinarian of surrounding temperature on the permeability rates of film and respiration rate of Pak-choi has been discovered . The mathematical model describing the relationship between respiration rate of Pak-choi and oxygen concentration in the package was established .

测定其性能，包括表现密度、孔隙率、显气孔率、透气率、弯曲强度和杨氏模量等，结果表明该材料对气体和液体有非常优良的浮透性。

The properties , including density , total porosity , open porosity , permeability , bending strength and Young 's modulus , were determined . The results show that the carbon CM material has very good permeability for gases and liquids .

结果表明：封接前对金属进行适当的预氧化处理，能提高绝缘端子的透气率和抗拉强度，当金属表面生成的过渡氧化膜厚度约为3μm时，封接质量最好。

The results show that the pre-oxidation treatment of house and pin before sealing can improve the permeability and tensile strength of insulation terminal , and that the sealing quality is best when the thickness of the transition oxide film at the metal surface reaches 3 μ m.

透气性、紧实率及铸型紧实度是湿型粘土砂及砂型的重要性能指标。

Permeability , compactibility and mould compaction are important performance characteristics of green sand and mould .

湿型砂透气性、紧实率及铸型紧实度快速测定方法与装置研究

Research on the Method and Device for Fast Testing Permeability and Compactability of Green Sand and Compaction of Mould

在铸造生产现场快速方便地测定湿型砂透气性、紧实率和铸型紧实度，对提高铸件质量、评价实砂方法优劣以及降低生产成本都具有重要意义。

It has great meaning for improving casing quality , evaluating compact method and reducing produce cost that green sand permeability , compactibility and mould compaction can be measured conveniently on the foundry workshop .

防水透气层中PTFE的含量为60%最佳，采用无水乙醇为造孔剂，防水透气层的厚度为0.8mm时可保证有良好的透气率和较长的使用寿命。

The electrodes will have better permeability and longer work life , when the optimal PTFE content in waterproof layer is 60 % , thickness of waterproof layer is at about 0.8mm and the pore former is ethanol .