With the great changes in the internal and external environment of the development of enterprises, the ideology, morality and values of Party members, cadres and employees have become increasingly multi-level. Ideological and political work is an important and powerful guarantee for the survival and development of enterprises. A strong ideological and political work is the ideological basis and guarantee for uniting the people of the whole country to smoothly promote reform, ensure social stability and promote economic development. In the new era of reform and opening up and the development of socialist market economy, great changes have taken place in the environment, content, channels and objects of ideological and political work in China. The situation of ideological and political work is more complex, the task is more arduous, and the work is more arduous. The traditional ideological and political work has encountered unprecedented challenges. The new situation, new tasks and the current situation of ideological and political work require all kinds of social organizations, including enterprises, to strengthen and improve ideological and political work. We must analyze the objective environment and basic characteristics of the ideological activities of cadres and staff in enterprises under the new situation from the perspectives of international and domestic, history and reality, the present and the long-term, and correctly examine and solve those problems. Some important theoretical and practical problems that affect the ideological activities of cadres and staff in enterprises provide us with a more practical way to improve the ideological and political work in the new era.
      Only by deep thinking, can we give full play to the positive role of ideological and political work in promoting the reform, stability and development of enterprises; only by making efforts to innovate, can we open a new situation of ideological and political work in enterprises in the period of innovation. Due to the limited level, there are inevitably deficiencies and inadequacies in the book. Please give your valuable opinions in the use process.

前 言

伴随着企业发展内外部环境所发生的巨大变化，企业党员干部、职工的思想、道德和价值观念变得日益多层次化。思想政治工作是企业生存与发展重要而有力的保障。坚强有力的思想政治工作，是团结和凝聚全国人民顺利推进改革、保证社会稳定、促进经济发展的思想基础和保证。在改革开放和发展社会主义市场经济的新时期，我国思想政治工作的环境、内容、渠道和对象都发生了很大的变化，思想政治工作面临的形势更复杂、任务更繁重、工作更艰巨，传统的思想政治工作遇到了前所未有的挑战。新形势、新任务以及思想政治工作的现实状况，要求社会各种组织包括企业在内，都必须大力加强和改进思想政治工作，必须从国际和国内、历史和现实、眼前和长远的角度，深刻分析新形势下广大企业干部职工思想活动的客观
环境及基本特点，正确审视和解决那些影响企业干部职工思想活动的重大理论问题和现实问题，为我们改进新时期的思想政治工作，提供一个比较切合实际的思路。
      只有深入思考，才能更好地发挥思想政治工作在促进企业改革、稳定和发展中的积极作用；只有努力创新，才能开创新时期企业思想政治工作的新局面。由于水平有限，在书中不可避免地存在着不足、不妥之处，恳请读者在使用过程中提出宝贵的意见。

With the rapid development of China’s economy, the scale of construction projects is expanding day by day, showing the trend of vigorous development. From the perspective of construction industry, improving the technical level and professional skills of construction personnel can effectively improve product quality and social benefits. Improving their own technical level and professional skills, especially the operation level of some key technologies, can greatly improve labor productivity. At the same time of reducing labor intensity, it can speed up the project progress and reduce the occurrence of accidents. Therefore, the improvement of professional level of construction personnel is the key point in the construction industry. Due to the rapid development of the domestic construction market, new materials continue to emerge, and quality problems follow. As the saying goes, engineering quality is a hundred year plan, which is not only related to the healthy, sustainable and stable development of national economy, but also related to the safety of people’s life and property. Therefore, quality safety and equipment maintenance are our principles.
      The relevant national departments attach great importance to the construction engineering, and have revised and updated the relevant industry codes and standards. For this reason, we have compiled the monograph “Installation and Maintenance of HVAC Equipment” according to these codes and standards and combined with practical work experience. But in recent years, with the rapid development of the domestic construction market, new materials, new processes and new technologies continue to emerge. But behind the development and innovation, the quality problem is prominent. Quality problems are often developed due to small mistakes or mistakes in key technologies. As the saying goes, engineering quality has a long history. It is not only related to the healthy, sustainable and stable development of the national economy, but also related to the safety of people’s lives and property. Therefore, we must adhere to quality first.

前 言

随着我国经济的飞速发展， 建设工程的规模日渐扩大， 呈现出蓬勃发展的趋势。从建设行业的角度来说，提高施工人员的技术水平和专业技能，可以有效的提高产品质量和社会效益。提高自身的技术水平和专业技能，特别是一些关键技术的操作水平，可以大大提升劳动生产率、在降低劳动强度的同时可以加快工程进度、减少事故的发生。因此，施工人员的专业水平提高是建设行业中的重点。由于国内建筑市场发展迅速，新型材料不断产生，质量问题随之而来。俗话说工程质量百年大计，它不仅关系着国民经济的健康、持续、稳定的发展，更关系着人民生命、财产的安全，因此，质量安全与设备维护是我们的坚持原则。
        国家相关部门对建筑工程十分重视，陆续修订并更新了相关的行业规范和标准。为此我们根据这些规范和标准，结合实际工作经验编写了《暖通空调设备安装与维护》这一专著。但是近几年来，国内建筑市场发展迅速，新材料、新工艺、新技术不断涌现。但是在发展与创新背后，质量问题凸显出来。质量问题往往都是由于细小差错或关键技术的失误发展而成，俗话说工程质量百年大计，它不仅关系着国民经济的健康、持续、稳定的发展，更关系着人民生命、财产的安全，所以我们必须坚持质量第一。

With the strong support of China, the air conditioning industry has gradually realized the automatic control of the central system. Through the central system of air conditioning, users can easily complete the shift, switch and other work of air conditioning, which not only makes the HVAC system safer, but also facilitates the management of the air conditioning industry.On the other hand, energy conservation and emission reduction is an important foundation for the development of our country. As an important energy consuming industry, air conditioning industry has a great relationship with the emission of carbon dioxide and other greenhouse gases. Through the automatic air conditioning system, air conditioning can realize self-operation and self-control, so as to effectively reduce the content of excess greenhouse gases in the environment.
     However, under the background of the development of air-conditioning industry in China, the popularity of automatic air-conditioning system is not high, and the price in the market is relatively high. In addition, among users, the use method of automatic air-conditioning system has not been popularized in place. Even if users purchase HVAC with automatic control system, in actual life, they do not have their own expectations for users effect. Therefore, the innovation of HVAC industry should not only stay in the technical level, but also in people’s ideological and cognitive views and propaganda efforts.
      Therefore, this book describes the installation and automatic control of HVAC from seven chapters, hoping to have some help.

前 言

空调行业通过我国的大力支持，已经逐渐实现了中央系统的自动化控制，通过空调中央系统，用户可以便捷地完成空调的换挡、开关等工作，不仅让暖通系统更加的安全，也方便了空调产业的管理工作。从另一个方面来说，节能减排是我国国家发展的重要基础，空调产业作为重要的耗能产业，和二氧化碳等温室气体的排放有很大的关系，通过空调自动系统，可以让空调实现自我操作，自我控制，从而有效降低环境内多余温室气体的含量。
      但是， 在现在我国空调产业发展的大背景下， 空调的自动系统普及程度并不高，在市场上的价格也相对较高，加上在用户中，空调自动系统地使用方法也没有普及到位，即使用户购置了含有自动控制系统的暖通空调，在实际的生活中，对用户也没有起到本身预期的效果。所以暖通行业的创新，不应该仅仅停留在技术层面，还应该在人们的思想认知观和宣传力度方面进行合理的创新。
      因此，本书对暖通空调安装与自动化控制的阐述从七章内容进行，希望有一定的帮助。

Forestry engineering project is a decision-making and implementation activity combining forestry investment behavior and forestry construction behavior. Affected by human, financial, material, time, technology, information and other resources, the project management is complex and needs to be completed by several units in cooperation. In order to learn from foreign advanced technology and management experience, in the process of implementing forestry projects with loans from international financial organizations, advanced technology and management concepts have been gradually introduced, especially the concept of environmental protection and management has been continuously strengthened, and now the environmental protection work of forestry projects has been improved, which has minimized the impact on biodiversity, water and soil loss. The impact of water and soil pollution has gradually achieved the goal of ecology and green, and provided more high-quality ecological products for the society. The implementation of environmental protection measures is essential to the implementation of the concepts of “harmonious coexistence of human and nature”, “respect for nature, conform to nature, and protect nature”, and is the key to the forestry construction in the way of production development, good ecology and environmental health.
   In recent decades, China’s forestry has experienced the stage of wood production, and then realized the transformation to ecological construction. Nowadays, with the deepening of forest understanding, it is also practicing to build the forest into a comprehensive function of a complete ecological system, a developed forestry industry system and an advanced forest culture system. This will push China’s forestry to a new stage of building modern forestry. Under the guidance of modern forestry theory, it will inevitably cause profound changes in all aspects of traditional forestry production, which requires forestry managers and forestry science and technology personnel not only to comprehensively grasp all kinds of basic knowledge of forestry science, but also to clearly understand all kinds of connections between forestry theory and production development, so as to better serve modern forestry. This book has done a more systematic carding and exposition of these problems.

前 言

林业工程项目是一种林业投资行为和林业建设行为相结合的决策与实施活动，受人力、财力、物力、时间、技术、信息等多种资源的影响；项目在管理上具有复杂性，需要由若干单位共同协作完成。为借鉴国外先进的技术和管理经验，在利用国际金融组织贷款实施林业项目的过程中，先进的技术与管理理念逐渐被引入，特别是环境保护与管理的理念得到不断强化，现在实施的林业项目的环境保护工作得到了提高，最大限度地降低了对生物多样性、水土流失、水土资源污染的影响，逐步实现了生态、绿色的目标，给社会提供了更多的优质生态产品。环保措施的落实对贯彻实施“人与自然和谐共生”“尊重自然、顺应自然，保护自然”等理念至关重要，是林业建设步入生产发展、生态良好、环境健康之途的关键所在。
       近几十年来，我国林业经历了以木材生产为主的阶段之后，又实现了向以生态建设为主的转变。如今，随着对森林认识的深化，又正在实践着将森林建设成完备的生态体系、发达的林业产业体系和先进的森林文化体系的综合功能体。这就将我国的林业推进到了建设现代林业的新阶段。以现代林业理论为指导，必然会引起传统林业生产中各个环节的深刻变化，这就要求林业管理人员和林业科技人员不仅要全面地掌握林业科学的各种基础知识，还要清楚地了解林业理论和生产发展之间的各种联系，这样才能更好地为现代林业服务。本书对这些问题做了较为系统的梳理与阐述。

With the economic development and social progress, people’s living standards have been greatly improved. With the rapid growth of population and the increase of demand, the natural forest resources of materials become increasingly scarce. More and more people begin to pay attention to the protection of ecological resources such as forestry. The harmony between human and natural society has always been the common topic that people pursue. In order to speed up the pace of forestry ecological construction, we need to further protect the forestry ecological environment, maintain the forestry ecological security, and improve the level of forestry ecological construction.
     This paper mainly introduces the protection of forest ecological resources and the prevention and control of related diseases and insect pests in China. Through the analysis of the history and trend of forestry development, the importance of ecological environment construction is recognized; through the introduction of the measures of ecological environment construction and the application of related technologies, we can further understand the forestry ecosystem. For the biodiversity in the forest ecosystem, we should strengthen its protection and monitoring efforts, at the same time, we should use scientific and reasonable ways to deal with the problem of diseases and insect pests. For the prevention and control of harmful organisms, the state should increase management efforts, and use drugs safely for prevention and control. The policy basis of modern forestry protection should take the protection of forest ecosystem into account and strive to achieve a balance between forest ecological development and forestry economic development, so as to promote the harmonious development of society and nature.

前 言

随着经济的发展，社会的进步，人们的生活水平有了极大的改善。人口的快速增长，需求的增长导致了材料的天然林资源愈加匮乏。更多地人们开始关注到林业等生态资源的保护问题。人类与自然社会的和谐相处一直是人们追求的共同话题。为加快林业生态建设步伐， 我们需要进一步保护林业生态环境， 维护林业生态安全，提高林业生态建设的水平。
      本文主要介绍了中国林业的生态资源保护和相关病虫害的防治问题。通过对林业发展的历史和趋势的分析，认识到了生态环境建设的重要性；通过对生态环境建设的措施和相关技术运用的介绍，来对林业生态系统进行进一步的了解。对于林业生态系统中的生物多样性，我们要加强其保护与监测的力度，同时，应当运用科学合理的方式处理病虫害问题，对于有害生物的防治，国家应当加大管理力度，安全使用药品进行防治。现代林业保护的政策基础，应考虑到保护森林生态系统并努力在森林生态发展与林业经济发展之间取得平衡，从而促进社会和自然和谐发展。