变宽

The results show that dynamic performance of catalyst is better than static performance and the selection window will be widen when the amplitude of A/F ratio fluctuation is enlarged.

结果表明催化剂在动态的性能好于静态；随空燃比波动幅值的增大，催化剂选择窗口变宽。

In this dissertation, we optimized the thinkness of each layer of TFEL devices using the layered optimization method to obtain ZnS: Ce〓 TFEL devices. Accoding to the energy level structure of Ce〓, two criteria for distinguishing the EL of Ce〓 were found out, from which it was conduded that the TFEL of ZnS: Ce〓 comes from 5d→4f transition of Ce〓. The measurement of brightness waveform showed that the TFEL of ZnS: Ce〓 was the luminescence from independent centers. and there were the field induced-delocalization in this process anf it〓s the cause of low TFEL efficiency of ZnS: Ce〓. In this dissertation, different influence factors on TFEL of ZnS: Ce〓 were sdudied. The influence of different host lattice is different: The blue/green ratio of ZnS: Ce〓 in hexagonal system of ZnS is larger than that in cubic system of ZnS, and the TFEL peaks in hexagonal system of ZnS moves toward longer wavelength compared with that in cubic system of ZnS. The adding buffer layer was used in this stage. The solubility of Ce〓 in ZnS was small and it was another limit to TFEL brightness of ZnS: Ce〓 device. The solubility of Ce〓 increased ten times when using Li ions as flux, so that the TFEL brightness of ZnS: Ce〓 was enhanced. It was found that the appearing of ZnO in active layer improves the TFEL of ZnS: Ce〓: the brightness and the wave range of ZnS: Ce〓TFEL were enhanced.

本文采用TFEL的分层优化方案，优化组合了各膜层厚度，选择最佳制备条件，得到了ZnS：Ce〓的TFEL；根据Ce〓的能级结构，找到了判别Ce〓的EL的两个简单依据，并据此断定ZnS：Ce〓的TFEL的两个发射峰分别属于Ce〓的〓和〓跃迁；亮度波形测量表明ZnS：Ce〓的TFEL属于分立中心发光，分析认为在此过程中存在着较严重的场致离化，这也是ZnS：Ce〓的TFEL效率较低的一个原因；本文考查了影响ZnS：Ce〓的TFEL的各种因素，发现：基质的晶体结构对ZnS：Ce〓的TFEL有所影响，在六角相ZnS中Ce〓的TFEL优于立方相ZnS中Ce〓的TFEL：发射峰的蓝-绿比相对较大，且光谱向短波方向移动，在此项研究中本文采用了在发光层前增镀过渡层的办法，过渡层为六角晶相的ZnO；限制ZnS：Ce〓的TFEL器件亮度的一个原因是Ce〓在ZnS中的溶解度低，本文用Li离子作助溶剂增大了Ce〓的溶解度，增大幅度为一个量级，并且ZnS：Ce〓的TFEL亮度明显提高；从ZnS：Ce〓的TFEL光谱来看ZnS：Ce〓的TFEL波长覆盖范围较小，亮度也不高，达不到做为白色TFEL材料的要求，需要寻找新的白色TFEL材料；在研究ZnS：Ce〓的TFEL中还发现：发光层中ZnO的出现有利于ZnS：Ce〓的TFEL：发射峰变宽、亮度增大。

The former is inpractical because it′s inefficient in computing and time consuming and the latter makes the failure probability bounds become wider.

前者因计算量大，耗时多不便实用，后者使结构体系失效率的上、下界限进一步变宽。

By performing an inverse Laplace transformation of the stretch exponential function a distribution curve of the diffusivity is obtained which is enables the molecular weight distribution to be extracted.The results show that the width of the molecular weight distribution increasing as the average molecular weight decreases during the degradation process.

结果发现，在降解过程中随着聚合物平均分子量的降低，体系中的分子量分布不断变宽，这一结果与GPC实验结果完全吻合，而且从PFG实验中得到的平均分子量变化趋势和随机断裂方式下的Monte Carlo模拟实验结果十分吻合，据此可以认为聚合物的降解是一个随机断裂的过程。

We has also probed into the effect of process stability by isocyanate index Ri in IPDI-N330 polyurethane reaction system.

发现Ri增大，分子内的作用力增大，乳液中分子趋于形成卷曲的团聚状，同时乳液的分子量分布变宽，散度增大。

Previous research indicated a drastic ontogenetic change in behavior, habitat, body shape, and recombination of tissue during metamorphosing from leptocephalus to juvenile stages. A maximum otolith increment width and sharp decreasing in otolith Sr/Ca ratios resulting from glycosaminoglycan broken–down were observed during metamorphosis.

研究指出，柳叶鱼仔鱼转换到稚鱼的变态过程，须经历行为、栖地转换与身体组织重组等个体发生的剧烈变化；在此过程将观察到耳石日周轮明显变宽、耳石Sr/Ca比因GAGs降解而急速下降等现象。

The paths, which are similar in shape, gradually widen and shift to more northerly latitudes.

这些外形相似的路径逐渐变宽并向北纬方向移动。

Pimelic acid is a weak β nucleator ,the β crystal form which induced is not stable and transforms to αcrystal form during heating,so the DSC peaks widen.

庚二酸是低活性β晶型成核剂，生成的β晶型不稳定，易在加热时转变为α晶型，造成DSC熔融峰变宽。

It was found that the RCM reaction taking place during the process of ROMP is the formed polymer.

发现在ROMP反应过程中进行RCM反应产生环己烯是聚合物分子量分布变宽的主要因素。

Successful tracheal intubation wasverified using the following criteria: 1 identification ofthe trachea and tracheal rings, 2 visualization of vocal cords,3 widening of glottis as the tracheal tube passes through,and 4 tracheal tube position above carina and demonstrationof movement of the chest wall visceroparietal pleural interface(i.e., sliding sign) after manual ventilation of the lungs.

成功的气管插管通过如下的标准证实：1）辨别气管和气管环，2）可见到声带，3）当气管导管置入时声门变宽，4）隆突上气管导管的位置以及手控通气时胸壁内脏壁胸膜界面的运动。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。