类化

The main factors governing photoinduced toxicity of the anthraquinone are molecular polarity, the ability of electron transition and the largest negative net atomic charges.

影响蒽醌类化合物对大型溞光敏化毒性的主要因素是分子的极性、电子的跃迁能力和原子最负净电荷。

Additionally, the quantum chemical study on the isomeriaation mechanism of the enol ester of 2-acyl-l,3-cyclohexanedione was performed, which was discovered by Yang when he synthesized the derivate of 2-acyl-l,3-cyclohexanedione.

第三部分工作是对杨定亚在合成2-酰基-1，3-环己二酮类化合物的衍生物时意外发现的烯酯异构化反应机理进行了研究。

In face of contemporary society and the complex and changing film art, epical films no longer pursue only outward features but broad and profound inner meanings, to reveal the human spirit and historical significance of wars and great events by using vivid metaphors and symbolic tensions. We say such epical films are undergoing an introversal development.

面对当代社会乃至电影艺术复杂多变的格局，有些被公认为具有史诗性的电影作品并非追求外在的史诗特征，而是追求内在意义的博大精深，并借助于形象的隐喻和象征的巨大张力，以求揭示某些重大历史事件所蕴涵的人类精神和历史意义，我们将这类影片视为"史诗性"的内向化的发展。

In the first place, on the base of studies concept ascending and attribute dependency, we forward a method to select attribute value partition, which can effectively resolve the problem of minimum faith and minimum support, in order to induct potential knowledge from standard discrete symbolic data, the dissertation studies join operation for generating candidate set and delete operation for deleting redundant equivalence class, and propose an recursion algorithm to realize highly generalization of data.

首先在研究概念爬升方法和Rough集理论中属性隶属度原理的基础上提出了一个划分属性值区间的算法，该算法能够有效的解决最小支持度问题和最小信任度问题。进而为了从已离散化的数据中概括出潜在的规则，研究了生成侯选集的交运算方法和排除冗余等价类的删除方法，然后利用循环推进机制实现对数据的概括。

In this paper,a novel kernel based SOM algorithm is proposed.we replace the Euclidean norm in the SOM training procedure with kernels,which is equivalent to change the metric of distance in input space.

引言 Kohonen提出的自组织特征映射理论(Self OrganizingMaps，SOM) [1 ] 具有聚类、自组织、自学习以及可视化的功能，已广泛的应用于模式识别、数据挖掘、故障诊断等邻域。

In the low temperature these polymers usuallywill undergo a glassy transition from an ergodic state to a non-ergodic(or non-equilibrium)state.

这类材料在低温下一般会发生由各态历经态到非各态历经态的玻璃化相变。

Geochemical identification supporting with cluster analysis method yields the divisionof eruptive stages and 3 cycles including 6 times.

地化鉴定结合聚类分析方法得出该区火山喷发可划分为 3 期6 次。

Includes erythritol, hydrogenated starch hydrolysates, isomalt, lactitol, maltitol, mannitol, sorbitol, and xylitol

糖醇类包括赤藻糖醇、氢化淀粉水解物、异麦芽酮糖醇、乳糖醇、麦芽糖醇、甘露醇、山梨醇和木糖醇。

Their properties and active life as catalysts for esterification are also discussed.

探讨了这类固体超强酸的制备条件、表面结构及其用作酯化催化剂的性能和寿命等问题。

At present, the new museum which is being built will be a modern synthetical museum in geoscience in area of 15000 square meters, which has compositive functions of park, scientific popularation, teaching and exhibition, and modern exhibitory technology.

目前，新建博物馆是一座占地面积75亩，建筑面积15000平方米，集园林、科普与教学展览为一体，拥有现化技术展示的现代化地学类综合性博物馆。

Shop assistant: Please check at the door.

店员：请您到门口柜台交费。

In the end, transportation of PAHs in the environmental matrix was preliminarily investigated and discussed according to PAHs data of soils and sediments from a certain region in Shanghai. The result indicated that there are two or more pathways on PAHs transportation in the environmental matrix.

最后，对上海特定地区内PAHs在环境介质中的迁移径途进行了分析讨论，结果表明上海市土壤和沉积物等环境介质中PAHs的迁移存在多种途径。