Based on this paper's objective and meaning, the water price system simulation model that is based on the system engineering, water price theory, input-output analysis is presented.
根据本文研究的目的和意义，建立了以系统工程、水价的基本定价理论和投入产出分析为基础的水价系统仿真数学模型。
The fourth part constructs the model of problem-solving based learning of chemistry, and discusses its meaning, its modeling, its characters, and its teaching and learning strategies.
第四部分是对基于问题解决的化学学习模式的构建，从基于问题解决的化学学习的涵义、模型构建、学科特点、教学策略和学习策略五个方面进行了论述。
Then the author offers a synthetical model based on sample evaluation combination efficiency and discusses the meaning of this model according to produce function theory.
在此基础上提出了基于样本评价组合有效性的综合模型，并根据生产函数理论讨论了这一模型的意义。
Based on the 3d modeling of plants, specific purpose, meaning characteristic and limitations of each model are discussed.
在植物三维建模的背景下，讨论了植物建模过程中不同模型的目的、内涵特点以及局限性。
Based on model comparison between the semi-infinite earth and the circular tunnel with peripheral infinite earth, the conception of long and large tunnel in the electrical meaning is put forward.
在比较半无限平面大地模型和四周无限大地圆形隧道模型基础上，提出电气上的长大隧道概念。
The characteristics of task itself and the information processing model of language learning underlie the rational of jointing task-based instruction with the process of meaning negotiation.
因为任务本身的特性及语言的信息处理模式构成了将任务教学和意义协商连接的基础。
Based on the concept of relation and sub-relation, this paper investigates the inherent meaning of traditional set operations for the nested relational data model.
本文提出的一个嵌套关系模型支持文本存储和文本检索操作，其中特征文件索引为文本检索提供了技术支持。
Based on the concept of relation and sub-relation, this paper investigates the inherent meaning of traditional set operations for the nested relational data model.
本文提出的一个嵌套关系模型支持文本存储和文本检索操作，其中特征文件索引为文本检索提供了技术支持。
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