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Therefore, the EL spectra of (Znq_2)_4 is wider than that of Znq_2. 4._2 was synthesized. The analysis of molecular spatial structure and the characterization of material performance of_2 and Liq showed that two Liq molecules and two Naq molecules were connected by Na-O-Na bond bridges to form_2. Compared with Liq,_2 exhibits stronger rigidity in planar molecular structure, larger steric hindrance and intermolecular distance, and much smaller molecular polarity, thus resulting in much longer fluorescence lifetime, much higher fluorescence quantum efficiency, wider energy bandgap and better film formability. When used as light-emitting layer in OLED,_2 shows lower formation probability of excited dimmer and exciplex formation than Liq, thus emits bluer light with higher current efficiency than Liq. When_2 ultrathin film is used as electron injection layer in OLED, it exhibits higher current density, higher luminance, lower turn-on voltage and higher current efficiency than Liq ultrathin film for the existence of sodium ions in_2 ultrathin film. 5. The summarization the relationship between molecular spatial structure and material performance of Alq_3,(Znq_2) and Liq, lead the conclusion that the molecular spatial structure of Mq_n affects its material performance in such aspects as the rigidity of planar molecular structure, intermolecular interaction, molecule stacking mode and intermolecular distance.

制备了_2，通过对_2和Liq的分子空间结构与性能进行分析与讨论，发现_2是通过两个Na-O-Na键桥将两个Liq和两个Naq连接构成的，其分子平面结构的刚性程度强于Liq，空间位阻大于Liq，分子之间的距离大于Liq，分子极性远远小于Liq；_2的荧光寿命长于Liq，荧光量子效率高于Liq，成膜性优于Liq；_2的禁带宽度比Liq大，光致发光光谱中_2的最大发射峰较Liq发生蓝移；当_2在OLED中作为发光层时，激发二聚体与激基复合物的生成几率远远小于Liq，发的光比Liq更蓝，电流效率大于Liq；_2超薄膜中有Na离子的存在，与Liq超薄膜相比，当其在OLED中作为电子注入层时，具有更大的电流密度，更高的发光强度，更低的阈值电压和更高的电流效率 5、对上述Alq_3、Znq_2和Liq的分子空间结构与材料性能之间的关系进行了归纳总结，认为Mq_n的分子空间结构主要在分子平面结构的刚性程度，相邻分子之间的相互作用，分子堆叠的方式和分子之间的距离这四个方面影响其性能。

Objective To investigate the Clinical characterization,diagnosis,preoperative localization and treatment of primary hyperparathyroidism.

目的 探讨原发性甲状旁腺功能亢进症的临床特征及术前定位诊断、治疗方法。

The analyticity of the propagators for higher order equations ina Banach space is studied,and a characterization is obtained.

研究Banach空间中高阶方程传播算子的解析性，获得一个特征刻划。

Given the well-established role of mitochondrial defects in human disease, functional characterization of these proteins may shed new light on disease mechanisms.

由于线粒体缺陷在人类疾病中起着重要的作用，因此，这些蛋白质的功能特性可能为疾病机制的研究带来新的启示。

Almost by itself this line justifies Frost's own characterization of the poem as being "about Revolutionary War," rather than, in a more general way, about the forming of a spiritual commitment to the land.

由於这一行本身几乎就已经证明这首诗是有关美国独立时的「革命战争」，而不是一般性地描述，对於土地的精神奉献。

Almost by itself this line justifies Frost's own characterization of the poem as being about Revolutionary War,rather than, in a more general way, about the forming of a spiritual commitment to the land.

由于这一行本身几乎就已经证明这首诗是有关美国独立时的「革命战争」，而不是一般性地描述，对于土地的精神奉献。

ABSTRACT The changes and characterization of endopeptidase isozymes and the degradation of Rubisco were studied during wheat (Triticum aestivum L. cv. Yanmai 158) leaf senescence.

为了了解植物叶片衰老过程中细胞内蛋白质降解和蛋白水解酶的变化行为，本论文对小麦（Triticum aestivum L.cv。

This paper analyses the characterization of Liu Bang in the ironic view: how the author employs skillfully verbal irony, situational irony and dramatic irony to depict an image of Liu Bang against the one in official history.

睢景臣一反以往作品观照历史人物的视角，改用俯视角度来看刘邦，巧妙利用言语反讽、情境反讽和戏剧反讽为读者塑造了一个悖离正史文本形象的刘邦。

The measurement space feature and the general characterization concept of single and double soft fault in linear circuits are presented.

提出了线性电路单一软故障和双重软故障所具有的电压增量空间特性和统一特征概念。

We try to understand the mechanism of inflorescence development in Lotus japonicus, the legume model system through the characterization of CEN homologues in it.

本研究选用豆科模式植物百脉根作为研究系统，从CEN的同源基因入手，对豆科植物的花序发育进行研究。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。