大孔隙

The higher carbon content in dry, ash-free basis of coal shows more remarkable influence of particle size on specific surface area, porosity ratio and pore volume.

煤中无水无灰基元素碳含量越高则其比表面积、孔隙容积与空隙面积受颗粒粒度的影响也就越大。

For different materials,the macrostructure of damage sites are dissimilar.The microstructure of damage sites were indicated as follows:the damages of granite and marble after being particle impacted were made up of damage of cleavage surfaces and crystal faces and spread of cracks along phase interface and pore space,which is harmful to mechanical property;while the damages of concrete and mortar were made up of cracks of transition zone and aggregates and plastic flow of C-S-H,which may cause more hidden danger to perma nence than to mechanical properties.

对四种材料损伤形貌的微观分析表明：花岗岩、大理石受颗粒冲击后产生的损伤主要为拉应力导致的解理面、晶面的破坏以及裂纹沿相界面和孔隙的扩展，对其力学性能有较大的危害；混凝土和砂浆的损伤由过渡区开裂、骨料破裂和C-S-H的塑性滑移共同构成，对耐久性造成的隐患远大于对力学性能的影响。

Why? Because they inevitably lead to bad habits in beginners, such as closed teeth and open apertures.

为什么？因为它不可避免的导致初学者养成不好的习惯，像上下牙摒紧，嘴唇孔隙过大等等。

Based on the Darcys law, the theoretical model of permeability measurement was established. And the influence of different testing methods and major process parameters such as fabric structure, fiber volume fraction, injection pressure, flow rate and resin viscosity on preform permeability were investigated in details. It was found that the permeability of fibrous reinforcement mainly lied on the preform architecture.

文中首先根据达西定律建立了渗透率测量的理论模型，深入研究了不同的测试方法及主要工艺参数(纤维织物织构、纤维体积含量、充模压力、流动速度、树脂粘度)对渗透特性的影响规律，发现多孔介质增强材料的渗透率主要取决于纤维织物的结构形式，预成型体孔隙分布及其体积分数、压实性对渗透率有较大的影响，提高充模压力和流动速度可以缩短充模时间，在一定程度上可以提高渗透率。

Porosity evolution influenced by those diageneses is also analyzed. The dissolution and alteration of feldspars and unstable rock fragments are the main constructive diageneses, but the compaction, pressure solution and cementation are the main destructive diageneses which are unavoidable.

溶蚀作用与蚀变作用是形成砂岩储层的两大建设性成岩作用，云母类矿物的水解作用对孔隙的形成也起到一定的积极作用；但机械压实、压溶作用和胶结作用则是储层形成过程中不可避免的破坏性成岩作用。

In general, it is similar in pore assemblage type, the stage division and the type of diagenesis, but there are great differences existed in rock types, clastic granularity, the type of infillings, and the influence of reservoir, because the reservoir located in different deposition belts and the different degree of diagenesis.

总体上，它们具有相似的孔隙组合类型、成岩作用阶段及类型划分；但因其所处的沉积相带和成岩作用强度不同，在岩石类型、碎屑粒度、填隙物类型及其对储层的影响作用方面有着很大的区别。

On both the slopes maximum water holding capacity and porosity of surface soil and particle density at all soil depths were lower in orange orchard compared to those in forest.

与灌木林地比较，桔园地表层土壤最大持水量、孔隙度和3个不同深度的土壤密度均较低。

Features: I plant production of coconut shell activated carbon, activated carbon with pericarps pore structure developed, large surface area, the absorption speed, wear-resistant high strength, excellent performance, quality and stability, repeated use of renewable and other features, users can also be requested to Raw material processing and production of various specifications of the activated carbon.

产品特点：我厂生产的椰子壳活性炭、果壳活性炭具有孔隙结构发达、比表面积大、吸附速度快、耐磨强度高、性能优良、品质稳定，可反复再生使用等特点，也可按用户要求来料加工和生产各种不同规格的活性炭。

Pericarps activated carbon have large domestic manufacturers of activated carbon, production of non-stereotyped porosity developed a series of activated carbon, surface area, wear-resistant high strength, the use of long cycle, rinse the characteristics of the time is short, widely used in pure water, high water Purification, medicine, food, industrial water treatment, air purification, MSG purification and other fields.

活性炭有国内大型果壳活性炭生产厂家，生产的不定型系列活性炭具有孔隙发达，比表面积大，耐磨强度高，使用周期长，冲洗时间短等特点，广泛用于纯净水，高纯水净化，医药，食品，工业水处理，空气净化，味精提纯等各个领域。

In the present dissertation, a surfactant-templated mesoporous silica molecular sieve with high pore volume, high porosity and narrow bimodal mesopore size distribution was synthesized for the first time in a reaction system, which was used usually in the synthesis of mesoporous MCM-41 molecular sieves, by a judiciously controlled two-phase sol-gel processing under basic conditions.

在本论文中，我们通过对一个通常用于制备介孔MCM-41分子筛的反应体系中正硅酸乙酯水解与缩合反应相对速率的精确调控，首次在弱碱性体系中合成了一种具有高孔隙率、大孔体积和双介孔孔分布特征的新型二氧化硅分子筛材料，简记为BMS，并对BMS二氧化硅分子筛中双介孔结构形成的原因及各种可能对其结构和性质产生影响的合成因素如Ammonia／silica摩尔比、组分浓度的变化、表面活性剂烷基链长度的调节、辅助有机物均三甲苯的引入、催化剂的结构和性质、溶剂和助溶剂的极性和用量、老化和干燥条件的变化及合成后水热处理等，利用不同的测试手段如XRD，SEM，TEM，〓Si MAS NMR，TG-DTA，N〓吸附测试等进行了系统的表征研究。

I'm gonna go pack my regular, long bathing suit.

我要去打包我那不起眼的超长泳裤

Random number generators are used in many areas, with the improvement of the computational ability of the computer.

随着计算机计算能力的不断提高，随机数发生器在许多领域有了更加广泛的应用。