Agricultural mechanization is an advanced mode of production, which can effectively improve the rural economy. Protective cultivation is an advanced farming method and a sustainable farming mode. Agricultural mechanization and protective cultivation are interdependent and inseparable. Accelerating both the agricultural mechanization and the development of protective cultivation is an important task in China’s agricultural development.
  Agricultural Mechanization means that the whole process of agricultural production is completed by machinery, which aims to improve labor productivity and land productivity. In recent years, the rapid development of Agricultural Mechanization in China has reduced the labor intensity of farmers, improved the efficiency of agricultural production, solved the problem of rural labor shortage and played a vital role in the rapid development of agriculture in China. However, the rapid development of agricultural mechanization has also brought some problems to the land environment. Agricultural machinery’s deep ploughing and wasteland reclamation have led to serious soil erosion and environmental deterioration. Therefore, it is necessary to popularize protective cultivation technology. Protective cultivation can achieve the goal of no tillage and less tillage by adopting mechanized cultivation. Protective cultivation and agricultural mechanization are interdependent and supplementary to each other. The combination of them can simplify the farming mode, reduce costs, increase economic benefits and achieve sustainable development. Protective cultivation and agricultural mechanization can also effectively reduce agricultural costs and improve food production, which needs to be vigorously promoted in rural areas of China.

前 言

农业机械化是一种先进的生产方式，能够有效的提升农村经济。保护性耕作是一种先进的耕作方式，是一种可持续发展的耕作模式。农业机械化和保护性耕作相互依赖，密不可分。加快农业机械化的同时大力开展保护性耕作是我国农业发展的重要任务。
      农业机械化是指农业生产的全过程都使用机械来完成，目的是提高劳动生产率和土地生产率。近年来，我国农业机械化的发展突飞猛进，减轻了农民的劳动强度，提高了农业生产效率，解决了农村劳动力短缺等问题，对我国农业的飞速发展起到了至关重要的作用。但农业机械化迅速发展的同时，也给土地环境带来了问题，机械化深耕深翻、开荒种地导致水土流失严重、环境恶化。为此，需要大力推广保护性耕作技术。保护性耕作通过采用机械化的耕作方式，从而达到免耕、少耕的目的。保护性耕作与农业机械化相符想成、互相依靠，可以简化耕作模式，降低成本，调高经济效益，同时能够起到可持续发展的效果。保护性耕作和农业机械化也能够有效的减低农业成本，提高粮食产量，需要在我国农村地区大力推广。

The rapid development of information technology has greatly promoted the management level of agricultural machinery. We have accelerated the pace of agricultural modernization and realize the optimization and upgrading of agricultural industry rapidly. The role of information technology in modern agricultural machinery management is increasingly prominent. It is of great practical significance to strengthen the application of electronic information technology in agricultural machinery.
  For the construction of modern agricultural society , It is of great strategic significance to accelerate agricultural mechanization. Especially after the 18th CPC National Congress , the strategic position of “agriculture, rural areas and farmer” has become the core development outline of the urban-rural integration of the four modernizations. This environment also puts forward higher requirements for the modernization of China’s agricultural mechanization. At the same time, it has become an important weapon to achieve the goal of advanced agricultural mechanization.

  Modern agriculture is based on the material technology of agricultural mechanization. The level of agricultural mechanization is an important symbol of the level of national agricultural industrialization and modernization. Agricultural mechanization, as the key carrier of effective implementation and promotion of agricultural biological high-tech research results, plays an important role in improving the comprehensive production capacity of grain, ensuring national food security, promoting the adjustment of agricultural industrial structure, speeding up the transfer of agricultural labor force, gradually developing agricultural scale operation, developing rural economy, increasing farmers’ income, speeding up the process of modern agricultural construction, and improving the market competitiveness of agricultural products.

前 言

信息技术的突飞猛进极大地带动了农业机械管理水平， 加快了农业现代化步伐,快速实现了农业产业的优化和升级。信息技术在现代农业机械管理中的作用日益凸显，加强对电子信息技术在农业机械中的应用研究具有重要的现实意义。
       对于建设现代化农业社会而言，加快推进农业机械化具有着重要的战略意义。特别是在党的“十八大”召开以后，“三农”工作的战略地位已经成为了四化同步的城乡一体化的核心发展纲要，这种环境下也为中国的农业机械化的现代化发展提出了更高要求，同时也成为了实现先进的农业机械化目标的重要武器。

 现代农业是以农业机械化为物质技术基础的农业。农业机械化水平的高低，是国家农业工业化和现代化水平的重要标志。农业机械化作为农业生物高新技术研究成果得以有效实施和推广的关键载体，对于提高粮食综合生产能力，保障国家粮食安全，促进农业产业结构调整，加快农业劳动力的转移，逐步发展农业规模经营，发展农村经济，增加农民收入，加快现代农业建设进程，提高农产品市场竞争力都具有重要的作用。

With the continuous improvement of medical science and technology, great progress has been made in basic theoretical research and clinical diagnosis and treatment. New theories, new technologies and new methods are constantly emerging. In order to facilitate the majority of clinicians systematically and comprehensively understand the clinical common diseases, multiple diseases diagnosis and treatment methods in a short time, this book is a new theory and technology in the field of medicine, covering all aspects of general medicine. The content system is comprehensive, the structure is clear, the language is concise, and the scientific and practical are integrated, the structure is smooth and reasonable, and the contents of each part are relatively independent, which have the function of connecting the past and the future, making the content smooth, effectively connected. The content is more but not disorder, the description is novel, flexible and diverse, and it is easier to master knowledge points.

前 言

随着医学科技水平的不断提高，基础理论研究、临床诊断和治疗均取得了巨大的进展，新理论、新技术、新方法不断涌现。为便于广大临床医师在较短时间内，系统、全面地了解掌握临床常见病、多发病的诊断及治疗方法，本书医学领域的全新理论与技术，涵盖全科医学领域的各方面的知识点。内容系统全面，条理清晰，语言简洁，融科学性和实用性为一体；结构顺畅合理，各部分内容相对独立成章的基础上，兼具了承前启后的作用，使内容流畅，有效衔接，内容多而不乱；叙述新颖，灵活多样，更易于知识点的掌握。

With the rapid development of China’s modernization, the gradual establishment and improvement of the market economic system, and the deepening of the reform of the construction management system, the engineering construction needs more and more professional talents with wide caliber and thick foundation.
  The book introduces the construction technology, network planning technology, construction organization design and general design of construction organization. Through learning, be familiar with the concept and steps of capital construction, the characteristics of construction engineering, the basic principles, methods and steps of construction
technology and network planning technology, master the content, methods and steps of unit project construction organization design, and master the compilation method of construction organization design of general civil buildings, high-rise buildings, single-layer industrial plants and highway projects. The content reflects adaptability and applicability.

前 言

随着我国现代化建设事业的飞速发展，市场经济体制的逐步建立与完善，以及建设管理体制改革的不断深化，工程建设越来越需要宽口径、厚基础的专业人才。
      书中介绍了建筑工程施工技术、网络计划技术、施工组织设计及建筑工程施工组织总设计等内容。通过学习，熟悉基本建设的概念、步骤以及建筑工程施工的特点，施工技术及网络计划技术的基本原理、方法和步骤，掌握单位工程施工组织设计的内容、方法和步骤，同时掌握一般民用建筑、高层建筑、单层工业厂房及公路工程的施工组织设计的编制方法。内容上体现适应性和可应用性。

Land resource management refers to the planning, organization, command, coordination and supervision of land development, utilization, management and protection in order to achieve the strategic goal of the sustainable development of national economy and society. Land is the most basic material basis for people's survival. The rational use and optimal allocation of land resources is an important issue to determine whether a region can develop sustainably, healthily and rapidly. It has important practical and guiding significance for the realization of the strategic goal of sustainable development and the effective improvement of the efficiency of land resources utilization.
  The rational use and optimal allocation of land resources is an important issue to determine whether a region can develop sustainably, healthily and rapidly. It has important practical and guiding significance for the realization of the strategic goal of sustainable development and the effective improvement of the efficiency of land resources utilization. In order to promote the virtuous circle of society, economy and ecosystem, we should take ecological stability, construction and development as the central task, resolutely implement the construction strategy of protection, consolidation and development, strengthen the water conservation, strengthen the scientific research of ecological environment protection, the popularization and application of new technologies and the scientific and technological support capacity of ecological environment protection. We should also control the land desertification caused by human factors, focus on controlling people’s irrational use of resources and follow the unified planning and unified layout in order to achieve the overall construction and coordinated development and promote the sustainable development of economy and society with the help of sustainable use of land resources. In addition, we should transform our goal from the maximization of economic benefits to the maximization of social, economic and ecological comprehensive benefits. The maximization of comprehensive benefits of oasis land resources is the guarantee of maintaining sustainable economic development, improving people's living quality and regional ecological environment stability.

前 言

土地资源管理是指为实现国家经济、社会可持续发展的战略目标，对土地的开发利用、治理、保护等进行计划、组织、指挥、协调和监督等活动的总称。土地是人们赖以生存的最基本的物质基础，土地资源的合理利用和优化配置是决定一个地区能否持续、健康、快速发展的重要问题，对实现可持续发展的战略目标，切实提高土地资源利用效益具有重要的现实和指导意义。
      土地资源的合理利用和优化配置是决定一个地区能否持续、健康、快速发展的重要问题，对实现可持续发展的战略目标，切实提高土地资源利用效益具有重要的现实和指导意义。为了促使社会、经济、生态系统的良性循环，将生态稳定、建设和发展作为中心任务，坚决实施保护、巩固、发展的建设策略，加强水士保持，加强生态环境保护的科学研究和新技术的推广应用以及生态环境保护的科技支持能力。控制人为因素所产生的土地荒漠化，重点控制人类不合理利用资源的行为，统一规划、统一布局、统筹建设、协调发展，以土地资源可持续利用促进经济社会的可持续发展，从经济效益最大化转变为社会、经济、生态综合效益最大化。绿洲土地资源的综台效益最大化是维系经济的可持续发展和提高人民生活质量及区域生态环境稳定性的保证。