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The paper reviews home and overseas research works on exhumation and use of nitrogen-fixing resource, genetics engineering of nitrogen fixation, and biochemistry of nitrogenase and chemical modeling of biological nitrogen fixation, and describe the prospect of biological nitrogen-fixing research.

本文从固氮资源的发掘和利用、固氮的遗传工程以及固氮酶生物化学和化学模拟生物固氮三方面对国内外的研究进展进行了全面的阐述，并对生物固氮研究的前景进行了展望。

The first chapter is exordium , it introduce the research background 、research meaning and the main work of our project.

本文第一章是绪论，介绍了本研究课题的研究背景，研究意义以及所作的主要工作。

The exordium expounds the origin of this research, the trends of thought, the methods, the object of research and its range.

绪论主要阐述研究的缘起、研究的思路与方法以及研究的范围与对象。

Naiman Station for Desertification Experiment and Research is one of the field statioos of the Chinese Ecosystem Research Network.

奈曼沙漠化试验研究站为中国生态系统研究网络站。

The Texas Agricultural Experiment Station is the agricultural and life sciences research agency of Texas, and conducts research to assure the highest quality food and fiber products, and a sustainable environment.

该站是德克萨斯州的农业科学和生命科学研究机构，从事研究以保证最高质量的食品和纤维产品，以及环境的可持续发展。

Research method, covers specific research methods, and introduces starting with experimental design to behavior science methods.

研究方法在介绍从实验设计到行为研究的特定研究方法。

It becomes a information exchange site,the exploration project,work area,research production,seismic datum,explainer datum,well datum can be organized into one system,which can share the research production in the exploration project;Through the datum expression of well decision,we can achieve the browsing of work area basemap,the seismic section"s remote display,the well position report"s display,the visual information of well"s wall.The system can lead to a right direction for those expert"s exploration decision .The system runs through all the process of well positon"s decision,deployment and management,which makes the exploration work becoming integrated.Now we can manage the well positon"s decision with computer,which improves work efficiency,condense whole exploration circle.

油田井位部署辅助决策系统以项目数据库的方式将分散在多个研究单位或个人手中的各类图档资料信息集中分类地保存起来，通过该系统使勘探项目、工区、研究成果、地震数据体、解释数据、井数据等有机地组织在一起，使勘探研究成果在勘探项目组内进行了充分共享；基于项目库，系统实现了井位部署决策所需的：工区底图浏览、地震剖面远程显示、井筒信息可视化，为论证专家提供了论证现场所需数据的展示；采用井位聚类分析和模糊数学综合评判决策方法，为井位论证决策提供了基本模型；利用井位部署流程子系统贯穿了井位论证、部署、管理业务的全过程中，使勘探业务有机的整合为一体，实现了井位论证工作的计算机管理。

The contributions of this dissertation are as follows.(1) It firstly applies the fife cycle theory to make typology and research for Chinese market system;(2) It finds the "Six curves constitute the throat" phenomena of Chinese household consumption structure macro-indicator, and thus contribute to structural theory literature;(3) It explanatorily forecasts Chinese household consumption trend by firstly using worst orbit forecasting method of reverse thinking;(4) It firstly proposes the concept of "educational urbanization development", and thus provide new angle to research urbanization in China;(5) It firstly proposes the hypothesis of "Deceleration Effect" of credit consumption on gini coefficient, i.e., income gaps can be filled by credit consumption.

本文创新之处在于：首次运用生命周期理论对中国市场经济体制进行划分和研究；发现了中国居民消费结构广义指标的"六线呈咽"现象，为结构理论研究增添了新的内容；首次逆向思维的运用最差运行轨迹预测方法，探索性的进行中国居民消费结构趋势预测；首次提出"教育型城市化发展的概念"，为研究中国城市化，提供了新的思路；首次提出信贷消费对基尼系数"熨平效用"的假设，即收入水平带来的差距可以用信贷消费的方式"熨平"。

The method of this research is case study, with depth interview to process this exploratory research.

本研究采用个案研究的方法，透过深入访谈的方式进行探索性研究。

Finally this paper has studied this research area extant question, and has forecasted this domain research development direction.

最后分析了本研究领域现存的问题，预测了本领域研究的发展方向。

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。