The process of urbanization in China has been accelerating. While the real estate industry continues to develop, it also puts higher demands on the building. At present, China's fabricated concrete structure building has been widely used due to various characteristics such as energy saving, short construction period and easy quality control. This book analyzes the structure of prefabricated building. Through the construction technology and safety risk assessment during the construction process, the construction safety management based on this is proposed to ensure the quality of the building. To adapt the construction industry to the needs of the market, it is necessary to use new building materials and new technology. Prefabricated building can realize the componentization and industrialization of the building, which will definitely guide the development trend of the construction industry. Buildings in China are usually made on site. As a new type of building, compared with traditional construction, prefabricated building has the advantages of shortening the construction period, ensuring the quality of the project, and saving energy and reducing emissions. This book first introduces the development of prefabricated building at home and abroad. Then, the basic characteristics of the concept, characteristics and advantages of prefabricated building are introduced. thirdly, the problems of prefabricated building in China at present are analyzed. Finally, the development of prefabricated building is prospected.

前言

随着我国城市化进程的不断加快，在房地产行业不断发展的同时，也对建筑提出了更高的要求。目前我国装配式混凝土结构建筑依靠节能、施工周期短、质量易控制等多种特点得到了广泛的应用。本书对装配式建筑的结构进行了分析，通过对施工过程中施工技术以及安全的风险评估，提出了在此基础上的施工安全管理，从而保证建筑的质量。要使建筑业适应市场的需要，就得采用新型建材，用新技术。装配式建筑可以实现建筑部件化、建筑工业化和产业化，装配式建筑必将引导建筑行业的发展趋势。国内建筑一般都采用现场制作的方式，而装配式建筑作为一种新型房屋建筑，与传统建造相比具有缩短工程工期、确保工程质量、节能减排等优势。本书先介绍了装配式建筑的国内外发展状况，然后介绍了装配式建筑的概念、特点、优势等基本特征，最后分析了装配式建筑在我国现阶段存在的问题，并对存在的问题进行了分析，最后对装配式建筑在我国的发展进行了展望。

In recent years, China's metallurgical industry has made considerable progress. Various steel and non-ferrous metal products have basically met the needs of economic construction and national defense modernization, which has driven the development of related industries and made great contributions to the rapid development of the national economy. However, with the development of the economy and the deepening of internationalization, the metallurgical industry is also facing new opportunities and challenges. Only by continuous summarization, integration and innovation can we make the metallurgical industry develop healthily and continuously; so that we can stand in an invincible position in the increasingly fierce competition.

In order to meet the needs of metallurgical engineering technicians in learning modern metallurgical science and technology and broadening their employment fields, this book not only summarizes the metallurgical industry and its materials, but also makes a thorough discussion on the smelting process and technology of iron, steel, copper, zinc and other non-ferrous metal materials, with a view to contributing to the flourishing development of China's metallurgical industry.

前言

近年来，我国冶金工业得到了长足的发展，各种钢铁及有色金属产品，基本满足了经济建设与国防现代化的需要，带动了相关产业的发展，为国民经济的快速发展做出了巨大贡献。然而，随着经济的发展，国际化的不断深入，冶金工业也面临着新的机遇与挑战。我们只有不断总结、集成、创新，才能使冶金工业健康、持续发展，才能在日益激烈的竞争中立于不败之地。

为了满足冶金工程技术人员学习现代冶金科学技术知识、拓宽就业领域的需求，本书不仅对冶金工业及其材料进行概括说明，更是分别对铁、钢、铜、锌以及其他有色金属材料的冶炼流程与工艺技术进行深入探讨，以期为我国的冶金事业蓬勃发展添砖加瓦。

Personnel archives management is an important work in the management of modern institutions and enterprises. It is a direct reflection of an employee's work experience, work attitude and work ability. The quality of personnel archives management in an enterprise is directly related to the development of employees and the construction and development of the enterprise. With the progress of society and the development of science and technology, personnel archives management also presents new changes. It has the great impact on informatization. Therefore, in the new situation, personnel archives management must also be informatized. In the 21st century, informatization and digitization have become the main trend of the society. Many industries in the society have implemented information management, which has brought great convenience to their development, including personnel archives management. The information construction of personnel archives management is to use computer technology to convert paper files into electronic files and finally realize the sharing of personnel archives information resources online. Therefore, in the current development and construction of science and technology, the information construction of personnel files has become an inevitable trend. Based on information construction, personnel archives management can keep pace with the times.

This book is divided into six chapters, which respectively elaborates the basic contents of personnel archives management and information construction, analyzes the existing problems at the current stage, and proposes corresponding solutions.

前言

人事档案管理是现代事业单位和企业经营管理中的重要工作，人事档案是一个员工工作经历、工作态度以及工作能力的直接体现，一个企业的人事档案管理工作的质量，直接关系着企业员工的发展以及企业的建设和发展，随着我国社会的进步和科技的发展，人事档案管理工作也呈现出了新的变化，其中最主要的就是信息化对其的影响。所以在新的形势下，人事档案管理工作也必须要进行信息化建设。进入21世纪，信息化和数字化成为社会的主要趋势，社会上很多行业实行了信息化管理，信息化的管理给其发展带来了极大的便利，其中就包括了人事档案管理工作。人事档案管理工作的信息化建设就是利用计算机技术，将纸质档案转为电子档案，最终实现网上人事档案的信息资源共享。所以，在现在的科技发展和建设中，人事档案的信息化建设，已经成为了必然的趋势，要进行信息化建设，人事档案管理工作才能够与时俱进，获得发展。

本书主要分六章内容，分别对人事档案管理和信息化建设进行基础内容的阐述与分析，还就现阶段存在的问题进行分析，并提出相应的解决策略。

In modern history, the progress of information technology has a great impact on education. On the one hand, traditional education is facing severe challenges; on the other hand, it also creates good opportunities for the further development of education. With the arrival of the information age, countries all over the world have paid unprecedented attention to the application of information technology in education. The rapid development of technology has made it possible to achieve the previously unattainable means or more ideal teaching methods. However, the reality is not as optimistic as people think. This is because many teachers in classroom teaching cannot effectively use this new technology means and methods to achieve efficient classroom teaching. The reasons are quite complicated, but the main reason is that information technology and classroom teaching fail to form an organic whole. Therefore, to change this situation, some necessary measures must be taken to make information technology play an important role in classroom teaching. However, to make better use of computer teaching, network security must be guaranteed.

This book gives a brief overview of the computer system, introduces modern educational technology and computer aided teaching, and expounds the security management of the network.

前言

在近现代历史上，信息技术的每一项进步，都对教育产生巨大影响。一方面是传统教育面临着严峻的挑战，另一方面，也为教育进一步发展创造了良好的机遇。信息时代的到来，使世界各国对发展信息技术在教育中的应用，都给与了前所未有的关注，以其技术发展极快的特点，使原来可望而不可及的手段或比较理想的教学方式变得可能了。然而，现实的情况并非像人们想象的那么乐观，这是因为许多教师在课堂教学中不能有效地运用这一新技术的手段和方法来实现高效率的课堂教学，究其原因是相当复杂的，但其中最主要的原因是信息技术与课堂教学未能形成有机的整体。因此，要改变这一状况，必须采取一些必要的步骤，使信息技术在课堂教学中发挥重要作用。然而要想更好地使用计算机教学，必须保证网络的安全性。

本书先通过对计算机系统进行简要的概述，接着介绍了现代教育技术、计算机教学，并对网络的安全管理进行了阐述。

China is a big country producing fruit and vegetable, and its output ranks first in the world. The fruit and vegetable processing industry has become an important part of the scale of fruit and vegetable planting. With the development of the economy and the improvement of people's living standards, people are paying more and more attention to food nutrition and their health. Fruit and vegetable juice beverages are rich in carbohydrate, amino acid, vitamins and mineral substance and other nutrients that are easily absorbed by the body, which can meet people's daily physiological need. Similarly, with the continuous advancement of science and technology, the freezing and refrigeration technology of food is getting more and more popular. The low-cost, long-term and high-quality preservation of food can be achieved by freezing and refrigerating food, which is the most commonly used method of food storage. By inhibiting the activities of microorganisms and enzymes and reducing the activity of food substrates, food spoilage can be prevented and the freshness and nutritional value of food can be maintained. At present, most places of freezing and refrigerating food in the market are large-scale refrigerators and freezers; and most households are generally refrigerators. The efficient and high-quality connection between the market and users depends on the construction of the refrigeration chain.

Through a brief introduction, this book will discuss the postharvest physiology, harvesting and commercial processing of fruit and vegetable products, fruit and vegetable storage, canned fruit and vegetable, quick-frozen fruit and vegetable, fruit and vegetable juice-making, fruit and vegetable sugar-making, fruit and vegetable pickling, fruit wine brewing, fresh-cut fruits and vegetable processing, and comprehensive utilization of raw fruit and vegetable.

前言

我国是水果和蔬菜生产大国，产量均居世界第一位，果蔬加工业已成为果蔬种植业规模化的重要环节。随着经济的发展和人们生活水平的提高，人们越来越重视食品营养与自身健康。果蔬汁饮料含有丰富的碳水化合物、氨基酸、维生素和矿物质等多种易被人体吸收的营养物质，能够满足人们日常的机体生理需要。同样，随着科学技术的不断进步，食品的冷冻冷藏技术越来越得到大家的喜爱，而且对食品的冷冻冷藏可实现食品的低成本、长时间、高品质的保存，是目前最普遍采用的食品贮藏方法。通过抑制微生物及酶类的活动和降低食品基质中的活性，来防止食品腐败变质，保持食品的新鲜度和营养价值。目前对市场食品冷冻冷藏的场所多为大型冷藏库、冷冻库，一般家用多为冰箱，实现市场与用户的高效、高品质的联系有赖于冷藏链的建设。

本书将通过简单的介绍，对果蔬产品采后生理、采收与商品化处理、果蔬贮藏、果蔬罐藏、果蔬速冻、果蔬制汁、果蔬糖制、果蔬腌制、果酒酿造、鲜切果蔬加工、果蔬原料的综合利用等方面加以论述。