The petrochemical industry is an organic synthesis industry that uses petroleum (including natural gas) as a starting material, and is also an industry that comprehensively processes and utilizes petroleum. It came into being at the early 20th century and has developed rapidly since the 1960s, becoming an important area of the world economic system. Since the discovery of Daqing Oilfield of CNPC in the 1960s, a number of large-scale petroleum refining and petrochemical enterprises have been established successively. Now the petrochemical industry is in the ascendant and has become one of the pillar industries of our national economy. The developed degree of petrochemical industry is also an important symbol to measure a country’s economic strength and industrial level. 

Facing the fierce competition in domestic and foreign markets, the industry is increasingly dependent on science and technology, and scientific and technological progress is increasingly demanding the proper structure and specifications of talents. Therefore, engineers and technicians in the petrochemical industry, including university students in petrochemical universities, should have a comprehensive understanding of the petrochemical industry, whether they are currently or in the future engaged in the development of high-tech products or in industrial production, technological innovation, technological management and other work.

The book is divided into five chapters. The first chapter mainly describes the development of petrochemical industry and its role in the national economy, the second chapter mainly explains the nature and classification of petroleum and high-quality products, the third chapter mainly addresses the relevant knowledge of industrial sewage, the fourth chapter mainly discusses the methods of sewage treatment, and the fifth chapter mainly analyses the content of chemical safety. Due to the limited editorial level, the complexity of the content, the wide range of issues, the inadequacies and mistakes are inevitable. We sincerely hope that petrochemical experts and readers in the industry can give advice.

前言

石油化学工业是以石油（包括天然气）为起始原料的有机合成工业，也是对石油进行综合加工利用的工业。它于20世纪初问世，60年代以来发展迅猛，成为世界经济体系的一个重要领域。我国在60年代发现大庆油田以来，相继建成了一批大型石油炼制、石油化工企业。现在石油化学工业方兴未艾，已成为我国国民经济的支柱产业之一。石油化学工业的发达程度也是衡量一个国家经济实力和工业水平的重要标志。

面对激烈竞争的国内外市场，行业对科学技术的依赖程度日益加深，科技进步对人才的结构和规格要求也越来越高。因此，石化行业的工程技术人员，也包括石油化工院校的大学生们，不论是目前正在或将来要从事高新技术产品的研制，还是从事工业生产、技术革新、技术管理等工作，都应对石化工业有较全面的了解。

全书共分五章。第一章主要写石油化工的发展及与国民经济的作用，第二章主要写石油与优品的性质及分类，第三章主要写工业污水的相关知识，第四章主要写污水处理的方法，第五章主要写化工安全方面的内容。由于编者水平有限，加上内容庞杂、涉及面广，不妥和错误之处在所难免，诚望业内石油化工专家和广大读者指教。

“Being an adult is the first step to become a talent”. Teaching is for educating people, while managing is for profit. In the process of participating in or cooperating with teaching management,  and on the premise of doing well in teaching conventions and ensuring teaching order, teachers should combine their teaching work with specific subject characteristics, social needs, life practice and students’ personality and personal needs (including short-term goals and long-term ideals), and provide students with a practical promising and ideal education, helping them to clarify the purpose of learning, cultivating their interest in learning, so as to helping them develop healthily and comprehensively. Otherwise, “To Study for the Rise of China” would be an empty slogan. Mathematics is a natural science with strong theory, and its abundant content, rigorous logic and flexible thinking pattern can cultivate students’ interest in learning. Examination is a necessary strategy of mathematical management. In fact, quality education and exam-oriented education are contradictory and unified. It is this main contradiction that promotes the development of current education. As long as our teaching activities conform to the laws of educational psychology, the characteristics of students’ physical and mental development, the needs of the three orientations of education and the nation, and not only for the sake of examinations, we will not go to exam-oriented education.

This book will discuss the transformation of high school running system, the teaching mode of high school mathematics, the application of hierarchical teaching in high school mathematics teaching, the application of hierarchical interaction in high school mathematics teaching, and the mathematics teaching under the network environment to a certain extent.

前言

“要成才，先成人”。教书要育人，管理出效益。老师在参与或配合教学管理的过程中，在搞好教学常规，保证教学秩序的前提下，应结合其学科特点、社会需要、生活实践、学生个性特点及个人需要（包括近期目标和远期理想），对学生进行具有实质性内容的前途、理想教育，帮助学生明确学习目的，培养学习兴趣，从而健康、全面发展。否则，“为中华之崛起而读书”就成了一句空洞的口号。数学是一门理论性很强的自然科学，其本身内容的丰富性、逻辑的严密性及思维的灵活性均可培养学生的学习兴趣。考试是数学管理的一种必要手段。事实上，素质教育与应试教育是一对既对立又统一的矛盾，正是当前这一主要矛盾推动了现行教育的发展。只要我们的教学活动符合教育心理学的规律，符合学生的身心发育特征，符合教育三个面向及民族的需要，不是仅为了考试而教学，就不会走向应试教育。

本书将通过高中办学体制转型、高中数学教学模式、分层教学在高中数学教学中的应用、层次互动式在高中数学教学中的应用、网络环境下的数学教学等方面进行一定程度的论述。

Building construction technology management runs through the whole process of residential construction. It is the primary task of residential construction. The level of construction technology management directly affects the quality, progress, cost and other aspects of residential construction. At the same time, it will also have a serious impact on the benefits and reputation of enterprises. Therefore, as a residential construction enterprise under the background of the new period, it is necessary to strengthen the technical management in the construction process, focus on improving the level of construction technical management, and establish a sound management system, so as to lay a solid foundation for the smooth progress of the construction technical management of residential construction.

Therefore, this book elaborates and analyzes the construction technology and management of residential construction in detail from ten chapters, and narrate the current situation, technology and development of China's residential construction. It hopes to provide a reference for the residential construction.

前言

房屋建筑施工技术管理贯穿于房屋建筑施工全过程，是房屋建筑施工的首要任务，且施工技术管理水平的高低直接影响着房屋建筑施工质量、进度、成本等方面，同时亦会对企业的效益与声誉产生严重影响，其重要性不言而喻。因此，作为新时期背景下的房建企业，必须加强施工过程中的技术管理，并着力提升施工技术管理水平，建立健全完善的管理体制，从而为房屋建筑施工技术管理工作的顺利进行奠定坚实的基础。

因此，本书从十章内容对房屋建设施工技术与管理进行详细的阐述与分析，对我国房屋建设施工现状、技术与发展进行叙述，希望能够为我国房屋建设事业提供一份帮助。

Archives are the records of the historical truth, and also the centralized place of various information resources. The modernization of archives management is the urgent need for its information products to serve the social and economic development and market. It is an important guarantee for the effective protection and utilization of archives to serve the social modernization. The archives resources themselves have high value and real guarantee rate, multi-level talents and their unique advantages, which are the superior conditions for archives to move towards market economy. Therefore, informationization and modernization of archives management are the goals we should actively promote.

This book introduces the history, current situation and development trend of China’s archives management, further explains the concept of archives and archives work, and focuses on the management of archives entities, the management of specialized archives, the construction of digital archives in China, and the diversity of archives management，meanwhile it also systematically explains the contents related to file management and information collection, organization, custody and statistics. This book contributes to the construction of China’s advanced archive management informatization.

前言

档案是再现历史真实的记录，又是各种信息资源的集中地，档案管理的现代化是其信息产品服务于社会经济发展走向市场的急需，是有效地保护和利用档案为社会现代化服务的重要保证。而档案资源本身又具有较高的价值和真实的保障率，多层次的人才及其得天独厚的自身优势，这是档案在迈向市场经济的优越条件，正因为如此，信息化与档案管理现代化才是我们要积极推进的目标。

本书首先介绍了我国档案管理历史、现状以及发展趋势，对档案与档案工作的概念作出进一步的阐释与说明，又重点探讨了档案实体管理、专门档案管理、我国数字档案室建设以及档案管理多元主体的协同治理，对当前涉及档案管理及其信息收集、整理、保管与统计的相关内容进行了科学系统的阐述研究，为我国先进的档案管理信息化建设添砖加瓦。

With the continuous development of China's economy, the speed and scale of urban construction have grown rapidly, and people's requirements for urban planning have become higher. The location of urban planning and design in the overall construction of the city is extremely important. Urban planning and design are directly related to the overall layout and functional division of the city. Once the plan is implemented and built, it is difficult to make large-scale changes. Therefore, in recent years, more and more attention has been paid to urban planning and design, and a certain development trend and direction has been formed.

Urban Planning and Design, a total of eight chapters, respectively expounds the urban planning, urban planning and public participation, integrating cultural planning, overall planning and zoning, urban design, city landscape planning and design, the ecological sustainability in the new town planning and design as well as the collaborative management of related theory and practice of urban planning and design strategies. In particular, it focuses on the analysis of the relevant theories of planning and design of ecological, civilized cities and sustainable modern cities and their laws and regulations. The purpose of this book is to provide a practical textbook and reference book for the participants in the construction of buildings, gardens and other urban construction.

As the book contains more content, involves more cumbersome knowledge, and has more compilers, the format, depth and breadth of the contents of each chapter may not be inconsistent; and the fallacies are inevitable. Readers are invited to criticize and correct. Suggestions for improvement will be gratefully received.

前言

随着我国经济的不断发展，城市建设的速度和规模随之飞速增长，人们对城市规划的要求也越来越高，而城市规划设计在城市整体建设中的位置又是极其重要的，城市规划设计直接关系到城市的整体布局和功能区域划分，一旦规划方案得以落实和建设，就难以进行大规模的改动，所以近年来对城市的规划和设计越来越重视，并形成一定的发展趋势和发展方向。

这本《城市规划设计》共八个章节，分别阐述了城市规划、城市规划法及其公众参与、整合文化规划、总体规划与分区规划、城市设计、城市景观规划设计、海生态新城可持续性规划设计以及城市规划设计协同管理的相关理论与实践方法策略，其中尤其对生态、文明城市与可持续发展的现代城市的规划设计相关理论及其法律法规进行重点阐述分析。我们编写《城市规划》设计这本书的意图是为广大建筑、园林等城市建设参与者提供一本实用的教材与参考书。

由于本书包罗内容较广，涉及知识较烦琐，编写人员较多，各章节内容的格式、深度和广度可能并不一致。且谬误无可避免，敬请读者批评指正。