查询词典 theoretical

A theoretical understanding of the dynamics of flight was first defined in print by Sir George Cayley in 1809, the same year he built and flew a heavier-than-air model.

一个理论的认识，动态飞行首次界定的打印由主席先生乔治的Cayley在1809年，同年他建立了飞往加重了比空气模型。

The study of IE has important implications because it can provide valuable lessons and theoretical references for the current campaign d CEE reform.

研究历史上的科举考试制度，可为当今的高考改革提供参考和借鉴，因此，科举学研究具有很强的现实性。

The study was to provide a theoretical base to control the pollution of heavy metal in soil and celery.

［目的］为控制重金属在土壤和西芹的污染提供理论依据。

See [90]. The theoretical work by these mathematicians supplied many of the ideas and approaches that were later used in more applied situations in physics, celestial mechanics, chemistry, biology, and other fields.

这些数学家的理论工作提供了很多思想和方法，这些后来都被应用于物理、天体力学、化学、生物学和其它领域更为复杂的情形。

The second is to propose an "open-cell" concept and derive a model on better theoretical basis to overcome the defects of the cell theory.

用模型，以满足工程上的需要；其二是针对胞腔理论的缺点，提出"开放胞腔"的概念，建立了一个理论基础和精度更好的理论模型。

In this thesis, by using theoretical analysis and numerical simulation, we study the characteristics of phase transition of cellular automaton models and the application of traffic flow hydrodynamic model to solve the traffic jam problems.

本文针对交通拥堵问题，通过理论分析和数值模拟，对交通流元胞自动机模型的相变特性和交通流流体力学模型的应用进行了研究。

Theoretical combination between RSIM Theory and Geography Location Theory was discussed based on Land Cellular Automaton.

以土地单元自动机为基础，研究了遥感信息模型理论与地理区位论的结合。

The aim was to lay the theoretical basis for the further development and utilization of cellulase.

［目的］为纤维素的进一步开发利用奠定理论基础。

Therefore, researching on the influence of effluent for vibration property of the sucker rod string has important reference value for rational configuration interval design of sucker rod centralizer, and also has important significant theoretical actual meaning on the simulation of the dynamic parameters and optimizing the running of polymer holes.

因此，研究聚驱抽油机井产出液对抽油杆柱振动特性的影响，对于指导扶正器配置间距设计、完善聚驱抽油机井动态参数仿真与运行优化技术都具有重要的理论和实际意义。

Objective: To study the related factor about severe headache after subarachnoid hemorrhage and to search after pathogenesis of cephalalgia, the theoretical secundum and more therapeutics were provided for headache with SAH .

目的了解蛛网膜下腔出血后剧烈头痛的相关因素，探讨SAH后头痛的发病机理，为头痛的治疗提供理论依据和多种途径。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。