发现

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 products amplified by primer 2 had polymorphism. The sequencing results indicated that there were two nucleotide mutations( C→A and C→T )at exon 1183bp and 336bp of hircine GDF9 gene, but the two mutations did not cause amino acid change. The products amplified by primer 3 had polymorphism.

所设计的6对引物扩增产物中共有3对发现了多态，引物1经SSCP分析虽然没有发现多态但经克隆测序却在外显子1编码区前-4bp处检测到A→C的突变。

The results of character evolution history reconstruction shows the SC in PT and AD clade might be a homoplasy character; also, the SC in PT clade might have multiple origins. SC in Pteridaceae has some special characteristics:(1) the cell long axes usually run parallel to the lateral veins;(2) Most of Pteris and Adianum species have VSC only in lower epidermis;(3) Species have ISC also have VSC.(4) Presence of spicular cells is highly correlated with the long veinal epidermal cells. Species have type III silica deposition type usually have longer and narrower veinal epidermal cell compared with ordinary epidermal cells; Species have type IV silica deposition type also have long epidermal cells, but not significantly different from ordinary epidermal cells.

本实验中亦发现凤尾蕨科之矽异形细胞具有几项特色：(1)矽异形细胞之长轴多与叶片侧脉方向平行(2)发现多数铁线蕨属以及凤尾蕨属植物仅下表皮具有脉上矽异形细胞；(3)具有脉间矽异形细胞的种类会同时具有脉上矽异形细胞；(4)长条形的侧脉上表皮细胞与矽异形细胞具有相关性，仅具脉上矽异形细胞的分类群之脉上表皮细胞均较一般表皮细胞细长；具有脉间矽异形细胞之物种之脉上表皮细胞亦为长条形但形态与一般表皮细胞常无明显形态差异。

On the fifth day, he was wandering the streets when he was spotted trying to turn on a hosepipe by Michael Bharath as the latter walked home from church.He and his wife made Mr Mootoo a sandwich and coffee, and, on finding the address of the lost man's step-mother in his pocket, drove him the five-minute journey to her home.

第5天，当达蒙在街头游荡时，一位名叫巴拉斯的男士发现了他，巴拉斯和妻子还为达蒙提供了三明治和咖啡，并在达蒙的口袋里发现了他继母家的地址，随后仅用了5分钟的车程就将达蒙送回了他继母家。

On the fifth day, he was wandering the streets when he was spotted trying to turn on a hosepipe by Michael Bharath as the latter walked home from church.He and his wife made Mr Mootoo a sandwich and coffee, and, on finding the address of the lost mans step-mother in his pocket, drove him the five-minute journey to her home.

第5天，当达蒙在街头游荡时，一位名叫巴拉斯的男士发现了他，巴拉斯和妻子还为达蒙提供了三明治和咖啡，并在达蒙的口袋里发现了他继母家的地址，随后仅用了5分钟的车程就将达蒙送回了他继母家。

On the fifth day, he was wandering the streets when he wasspottedtrying to turn on a hosepipe by Michael Bharath as thelatter walkedhome from church.He and his wife made Mr Mootoo a sandwich and coffee, and,onfinding the address of the lost mans step-mother in hispocket,drove him the five-minute journey to her home.

第5天，当达蒙在街头游荡时，一位名叫巴拉斯的男士发现了他，巴拉斯和妻子还为达蒙提供了三明治和咖啡，并在达蒙的口袋里发现了他继母家的地址，随后仅用了5分钟的车程就将达蒙送回了他继母家。

Using gene chips to screen an SSH library could efficiently identify those differentially expressed genes without the need to examine previously cloned genes, and increase the number of target genes by decreasing the examination of multiple'house-keeping'genes.

因此，基于SSH方法和基因芯片技术的特点，将两者联合应用将是有针对性地发现大量差异表达基因的有效方法，而且可以大大提高发现新基因的机率。

We have discovered many important objects and investigated the workmen's huts in the Valley, some of which were first discovered by Howard Carter.

我们已经发现了很多重要文物，调查了山谷中的工人木屋，其中一些是霍华德-卡特首次发现的。

Within the newfound temple complex is a pyramid-shaped tomb, called Huaca Norte, which was filled with the skeletons of 33 women.

在这座新发现的庙宇群内，考古学家发现了一个金字塔形坟墓，被称之为"Huaca Norte"，里面共有33具女性的尸骨。

They found that the cool stars, both the M-dwarf stars and browndwarfs, showed no hydrogen cyanide at all, while 30 percent of thesun-like stars did.

他们发现所有的寒冷恒星，无论是M型红矮星还是棕矮星，全都没有HCN分子踪迹，而类太阳恒星周围，只有30%左右的没有发现HCN。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。