扩散

In this paper, preliminary FDS fire chamber to simulate the flue gas generated through the corridor adjacent to the room near the migration laws, an analysis of indoor air flow field and the movement of smoke layer, and through the simulation of fire scenes, in a simple form of visual dynamic display of the entire process of fire, in the simulation process to obtain more accurate fire-related parameters such as temperature distribution, gas flow and heat radiation, and analysis of simulation results through the fire chamber of the flue gas migration characteristics, results showed that the chamber in the absence of fire smoke control measures, the process of the spread of smoke filled the first chamber is at the top, with the passage of time, the proliferation of slowly downward until the entire chamber is full, and then through the corridor smoke quickly spread to the nearby chamber.

本文运用FDS初步模拟了腔室火灾产生的烟气通过毗邻的走廊向附近房间迁移的规律，分析了室内空气流场和烟气层运动状况，并通过对火灾场景的模拟，以简单直观的形式动态显示出火灾发生的全过程，在模拟过程中获得较准确的火灾相关参数，如温度场分布，烟气流动及热辐射等，并通过模拟结果分析腔室火灾的烟气迁移特性，结果表明着火腔室在无防排烟措施的情况下，烟气扩散的过程是首先充满腔室顶部，随着时间的推移，慢慢向下扩散，直至将整个腔室充满，然后烟气通过走廊快速向附近腔室蔓延。

The practical operation shows that the system can realize the temperature control of multi workplats fritting furnaces and also the control of the fritting furnace′s supplementary functions,this system by this method has excellent quality and efficiency. PLC ; temperature control ; fuzzy control ; fritting furnace

系统操作简单、可靠性好，大大提高了温度控制精度及工艺过程自动化水平，具有很好的经济效益。1系统的工艺要求及功能要求1.1系统的工艺要求本控制系统的控制对象为多工位扩散炉，它是由多个扩散炉炉体和一个加热炉体

The calculation of parameter m_0,that is the amount of CO_2 absorbed by unit volume of concrete completely carbonated,was proposed by the analysis of concrete hydration process and carbonation mechanism,and the simplification formula of fly ash concrete applied in practice was suggested.The calculation of another important parameter D_e,that is the effective diffusion coefficient,was also proposed on the basis of the mechanism gas diffusion in concrete.

通过对混凝土水化过程、碳化机理的深入分析，提出了模型参数——完全碳化时单位体积混凝土吸收二氧化碳的量m_0的计算方法，并给出了工程中常用粉煤灰混凝土的简化实用公式；基于气体在混凝土中扩散机理的分析，给出了另一个重要的模型参数——二氧化碳在混凝土中有效扩散系数D_e的计算公式。

A new kind of gas diffusion electrode- flaky and vertical gas diffusion electrode was introduced in this paper.

介绍了一种新型气体扩散电极———片状立式气体扩散电极三相界面的工作原理和优点，这种片状电极可用于气体参与反应的金属-空气电池和燃料电池。

The study focuses on transport phenomena of cathode gas diffusion layer of PEM fuel cell by using two-phase flow model. Liquid water saturation and oxygen concentration profile in gas diffusion layer and polarization curve are investigated by numerical simulations.

本研究主要探讨质子交换膜燃料电池阴极气体扩散层内的两相流传输现象，利用数值方法求解出燃料电池阴极气体扩散层内液态水饱和度分布、氧气浓度分布以及性能曲线。

It is well known that the gettering dwell time of rapid thermal phosphorous gettering is too shorter to dissolved impurities and precipitate of transitional metals in the silicon matrix and diffused to the gettering sites.

恒温磷扩散对于在中、低温(低于900℃以下)时铁的沾污有明显的吸杂作用，可以很好的恢复和提高材料的电学性能，特别在磷扩散吸杂后再结合进行氢钝化处理可大大的改善材料性能。

It was deduced that haemocyte played an important role in WSSV infection.

从而说明在WSSV侵染扩散过程中，血细胞首先识别病毒并进行抵御，但正是在血细胞的协助下，病毒扩散到了全身各组织。

A pair of redox peak of Eu~(3+) of the concentration of 1×10~(-4) mol/L appeared on both bare pyrolytic graphite electrode and bare glassy carbon electrode in HAc-NaAc 0.2 mol/L pH 6.0 buffer, and controlled by the diffusion current. There was also a good reversible redox peak of Eu~(3+) of the concentration of 1×10~(-3) mol/L on bare pyrolytic graphite electrode in Heps 0.01 mol/L pH7.4 and in the charge of diffusion current.

当底液为0.2mol/L pH6.0的HAc-NaAc缓冲溶液、Eu~(3+)浓度为1.0×10~(-4)mol/L时，在裸热解石墨电极与裸玻碳电极上均有一对氧化还原峰，且受扩散电流控制；当底液为0.01mol/L pH7.4 Hepes缓冲溶液、Eu~(3+)浓度为1.0×10~(-3)mol/L时，在裸热解石墨电极上出现一对可逆性非常好的氧化还原峰，同样受扩散电流控制。

The conclusion is that there is enough diffusion reaction between base material and interlays, vacuum diffusion bonding weldability of TiAl and 42CrMo is good.

研究发现，母材与中间层发生了扩散反应，采用加入中间层的真空扩散连接TiAl金属间化合物与 4 2CrMo钢具有良好的可焊性。

These microlites and richer amorphous region will benefit the polycondensation reaction of PET, the diffusion of volatile by-products, and the approach of the end-groups of PET molecular chains by forming more routeways, which may result in the higher rate of SSP.

作者认为这些更多数量的微晶体有利于固相缩聚过程中副产物小分子的扩散去除及PET大分子链端基的扩散接近，从而在宏观上表现为PET／MMT的固相缩聚速率大大提高。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。