膜层

Electrochemical properties of electrodeposited Cu/Co multilayers were investigated by potentiodynamic curve and electrochemical impedance spectroscope. X-ray diffraction and scanning electron microscopy were used to study the sample structure and morphology.

中文摘要本研究利用准稳态动电位扫瞄法、电化学交流阻抗法研究电镀铜钴多层膜的电化学特性，并利用X光绕射仪和扫瞄式电子显微镜研究镀层的结晶结构和形态。

The invention relates to a gaseous diffusion layer for a polymer electrolyte membrane fuel battery and a preparation method thereof, relating to a gaseous diffusion layer for a fuel battery and a preparation method thereof.

用于聚合物电解质膜燃料电池的气体扩散层及其制备方法，它涉及一种用于燃料电池的气体扩散层及其制备方法。

Results: 1 The analysis revealed that GAP-43 immunopositive neurons in rats were localized in all the layers of lateral geniculate nucleus and the layers II -VI of visual cortex area 17,and GAP-43 is stained by a ring and dot figure and brown-yellow colour in cytomembrane ; 2, In the critical period, gene expression concentration and number of GAP-43 immunopositive neurons, in both the lateral geniculate nucleus and the visual cortex area 17, received from the deprived eyes, are reduced.

结果：1、GAP-43在正常大鼠视觉系统表达主要见于外侧膝状体全层和视皮质17区Ⅱ—Ⅵ层神经元胞膜中，呈环状或点状棕黄色免疫阳性反应；2、在敏感期内剥夺眼对侧外侧膝状体和视皮质17区GAP-43表达的免疫阳性神经元染色变淡(P＜0.05)，且免疫阳性神经元数目减少(P＜0.05)。

Caliche on gravel, as an indicator of variation of sedimentary environment, records relatively complete information on environment and climate.

砾石钙膜作为一种反映环境变化的沉积物标志，记录了比较完整的环境和气候信息，其实物的直接表现形式就是沉积了明暗相间的纹层，而形成明暗纹层的主要原因是受沉积时碳酸盐的纯度和结晶物的粒度以及杂质等的影响。

In the BPW,a brazing filler metal,which has high melting point and is able to dissolve the base metal significantly,is placed between the faying surface to be joined,the assembly is heated with high frequency induction heating,and a high uniaxial pressure is applied to discharge the molten interlayer ...

BPW新工艺以熔点较高并能显著溶解母材的钎料为中间层，利用感应电源加热并施加较大的压力，挤出液态中间层及氧化膜等形成的夹杂物，最终在焊接面周边形成圆滑过渡的钎角，同时，在界面处实现洁净母材之间直接接触的固相压力焊接合。

Fourthly, the concentration processes for liquid membrane separation are studied. The feed tank levels are difficult to be tracked efficiently in the random-rinsing and continuous-discharging nanofiltration process.The tracking control of feed tank levels is improved by the selective control and the transparent predictive functional control.

针对液体膜分离浓缩过程采用纳滤随机清洗连续排料操作方式时原料罐液位的不能有效跟踪控制问题，提出了原料罐液位的选择性控制及以预测函数控制PFC为监督层、常规PID为控制层的透明控制结构，实现了以常规PID为基础控制、PFC为设定值给定的原料罐液位的跟踪控制。

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。

In chapter five, the structure of La0.7Ca0.3MnO3 /Cu trilayer films on different substrates have been studied.

第五章，研究了在不同基片上的La0.7Ca0.3MnO3 /Cu复合体系的多层膜的电输运性质，并讨论了不同厚度的Cu层对样品性质的影响。

The composite coating followed by laser remelting and then aluminizing displays the best cyclic oxidation behavior, and scale spalls least; the composite coating followed by diffusion in 1200℃ for 6h does the next best.

激光重熔处理后再渗铝的复合镀层抗循环氧化性能最好，氧化膜剥落少。高温扩散处理后再渗铝的复合镀层次之。循环氧化200小时后，所有涂层内侧退化较轻。

The difference of the characteristics of HHQ monolayer is dependent on the difference of radii,nuclear charges and the structures of valence shell of metal ions.

金属离子的半径、电荷及核外价电子层结构不同是影响HHQLang－muir单分子层膜性能的本质原因。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。