Ultrasound diagnosis has the characteristics of no injury, no pain and various display methods to human body, especially for the exploration of human soft tissue and the measurement of hemodynamics of cardiovascular organs. It has the advantages that other methods can not compare, and has become one of the most widely used diagnostic means in modern medicine. Ultrasound medicine has been widely used in the prevention, diagnosis, treatment, rehabilitation, monitoring and general survey of human diseases. Also, with the improvement of people’s health needs, the depth and scope of its application are expanding.
    In recent years, with the rapid development of computer, information technology, electronic technology, new piezoelectric materials and other high-tech, as well as the increasing demand for clinical diagnosis and treatment, new technologies of ultrasonic medicine and imaging emerge in an endless stream, the system of ultrasonic medicine and imaging develops to a high level, and the quality of image becomes increasingly perfect.
    Combined with the current development of ultrasound medicine, this book will introduce the related theories and knowledge of ultrasound medicine in detail from many aspects, and elaborate the relevant contents of current technology of ultrasound medicine and imaging. The content is comprehensive, systematic and practical, which can be used as a reference for engineering and technical personnel engaged in ultrasonic instrument sales, application training and hospital equipment management. Due to the limitation of the author’s level, fallacies and omissions are inevitable. Readers are welcome to criticize and correct them.

前 言

超声诊断具有对人体无损伤、无痛苦、显示方法多样的特点，尤其是它对人体软组织的探查和心血管脏器的血流动力学测量有其他方法不能相比的优势，已成为现代医学中使用最为广泛的诊断手段之一。超声医学已经在预防、诊断、治疗、康复、监护和普查人体疾病中得到了广泛应用，并且随着人们健康需求的提高，其应用的深度和广度都在不断扩大。
    近年来，随着计算机、信息技术、电子技术、新型压电材料等高科技的迅速发展和临床诊断及治疗的需求增加，超声医学与影像新技术层出不穷，超声医学影像系统向高层次发展，图像品质日趋完美。
    本书结合当前超声医学发展现状，将从多个方面详细介绍超声医学相关理论与知识，阐述了目前超声医学影像技术的相关内容。内容全面、系统、实用，可供从事超声仪器销售、应用培训及医院设备管理的工程技术人员学习、参考。由于作者水平所限，谬误和疏漏之处在所难免，恳请广大读者朋友批评、指正。

Landscape construction is an important project in the process of urban construction. To some extent, the level of landscape construction reflects the level of urban construction and development. With the rapid development of urbanization, the urban ecological environment is getting worse and worse. In order to promote the sustainable development of the city, people pay more and more attention to the construction of landscaping. More and more people realize the importance of environmental protection. Many first-tier cities have begun to vigorously develop ecological construction, while some small towns have begun to pay attention to landscape planning and construction, and want to develop themselves into cities with characteristics through ecological protection and construction. At the same time of landscape planning and design, the original ecological protection is essential. The construction of ecological garden can provide a certain leisure area for people’s life and let people feel the natural flavor. Landscape planning and design has also laid a solid foundation for the development of urban environment, which can not only improve people’s quality of life, but also meet the development needs of modern society and move towards sustainable development. This book systematically summarizes the theoretical knowledge of landscape design, and provides reference guidance for relevant practitioners.

前 言

园林建设是城市建设过程中的重要工程项目，园林建设水平在一定程度上反映了城市建设及发展水平。随着城市化进程的不断加快，城市生态环境日益恶劣，为促进城市的可持续发展，人们越来越重视园林绿化建设工作，越来越多的人们认识到了环境保护的重要性，很多一线城市开始大力开发生态建设，而一些小城镇也开始注重园林规划建设，想要通过生态保护建设将自身发展成为具有特色的城市。同时越来越多的人们认识到了环境保护的重要性，而在园林规划设计的同时原生态保护是必不可少的。生态园林的建造能够为人们的生活提供一定的休闲区域，让人们感受到带自然的气息。园林规划设计也为城市环境发展奠定了坚实基础，不仅可以提高人们的生活质量，也能够符合现代化社会的发展需求，朝着可持续化发展方向
前进。本书系统归纳了园林设计理论知识，为相关从业者提供可参考的指导资料。

With the rapid development of China’s economy and urbanization construction, people’s environmental awareness is also constantly improving, and the requirement for the comfort of living space is higher and higher. Urban landscape construction has become an important factor affecting urban construction, urban appearance and environment construction and urban management level. At the same time of green construction in full swing, how to make the planning and construction of urban landscape play the largest ecological benefits and achieve sustainable development is more important.
      In recent years, in the planning and construction of modern cities in China, urban planning departments and all walks of life have realized the importance of landscape construction. One of the important ideas of landscape design is to build landscape and show its vitality. Relevant departments continue to increase capital investment in landscape construction, gradually put landscape planning on the height of urban ecological construction, and create a local environment with characteristics according to the differences of climate characteristics, natural features and regional cultural characteristics.
      Therefore, this book elaborates the landscape planning and design from eight chapters, hoping to have some help.

前 言

随着我国经济和城市化建设的快速发展，人们的环境意识也在不断提高，对生存空间舒适度的要求也越来越高。城市园林景观建设已经成为影响城市建设、市容环境建设和城市管理水平的一个重要因素。在绿化建设如火如荼进行的同时，如何让规划建设的城市园林景观发挥最大的生态效益并实现可持续发展显得更加重要。
       近年来，在国内现代城市的规划与建设中，城市规划部门及社会各界已经认识到园林景观建设的重要性 ，建设园林景观，展现园林的生机和活力成为园林景观设计的重要理念之一。相关部门不断加大园林景观建设的资金投入力度，逐步将园林规划放在城市生态建设的高度上去思考，并根据气候特点、自然风貌以及地域文化特征等差异，营造出了富有地方特色的环境。
        因此，本书从八章内容对园林景观规划设计进行详细的阐述，希望能够有一定的帮助。

Water conservancy and hydropower is an important infrastructure and basic industry for social and economic development. With the deepening of the management system reform of construction industry in China, the management system of water conservancy and hydropower construction enterprises in China, with project management as the core, has also undergone great changes, which requires enterprises to carry out standardized and scientific management of construction projects.
This book is divided into nine chapters, including water conservancy and hydropower project construction, water conservancy and hydropower project management mode, water conservancy and hydropower project bidding management, water conservancy and hydropower project investment control and management, water conservancy and hydropower project quality management and control, water conservancy and hydropower project safety risk management, water conservancy and hydropower project construction progress management and integrity construction, water conservancy and hydropower project construction subcontract management as well as the application of value engineering in water conservancy and hydropower project management, the problems and solutions in the process of water conservancy and hydropower project management are analyzed in detail.This book can provide theoretical guidance for scientific and reasonable construction project management of water conservancy and hydropower construction enterprises in China. Due to the limited level of the author, there are still many shortcomings in this book. Readers are welcome to criticize and correct them.

前 言
水利水电是社会经济发展的重要基础设施和基础产业。随着我国建筑业管理体制改革的不断深化，以工程项目管理为核心的中国水利水电施工企业的经营管理体制也发生了很大的变化，这就要求企业必须对施工项目进行规范、科学的管理。
本书分为九个章节，包括水利水电工程建设、水利水电工程项目管理模式、水利水电工程招投标管理、水利水电工程投资控制与管理、水利水电工程质量管理与控制、水利水电工程安全风险管理、水利水电工程建设进度管理和诚信建设、水利水电工程施工分包管理以及价值工程在水利水电项目管理中的应用，详细地分析了水利水电工程项目管理过程中存在的问题及其解决措施。本书可以为我国水利水电施工企业科学合理地进行施工项目管理提供理论指导。由于作者水平有限，本书中仍然存在诸多缺点和不足，敬请广大读者批评指正。

With the rapid development of national economy, water resources are difficult to meet the needs of production and life of the whole society. In order to make full use of more water resources, we must rely on the construction of water conservancy and hydropower projects to meet our growing needs. Water resources are clean and renewable energy, and its utilization is the product of social progress to a certain stage. Furthermore, the rapid development of our country’s economy and society directly promotes the innovation and development of water conservancy and hydropower projects, and plays a very critical and important role in the construction technology innovation of water conservancy and hydropower projects.
Therefore, this book elaborates the construction and management of water conservancy and hydropower projects from eight chapters, hoping that engineers can deepen the construction project management while paying attention to its construction characteristics in daily work, so as to ensure the smooth development of the project.

前 言
随着国民经济的快速发展，水利资源难以满足全社会生产生活的需要，为了充分利用更多的水利资源，我们就要依靠水利水电工程建设来满足我们日益增长的需要。水利资源是清洁的可再生能源，它的利用是社会进步到一定阶段的产物。进一步说，我国经济社会的高速发展直接促进了水利水电工程的创新及发展，在水利水电工程建设过程中水利水电的施工技术的创新起到非常关键、非常重要的作用。
因此，本书从八章内容对水利水电工程建设和管理进行详细的阐述，希望工程师能够在日常工作中， 在注重其工程施工特点的同时能够将施工项目管理进行深化，以保证工程顺利的开展。