Wei Li

This open access book serves as a comprehensive exploration of Alternating Current Field Measurement (ACFM), encompassing the foundational theory crucial for subsequent chapters, as well as the design and testing of ACFM probes, instruments, and software. Providing guidance and serving as a reference for ACFM instrument development, the text delves into visualization research in ACFM, offering valuable insights for technical engineering applications. Nondestructive testing (NDT) emerges as a pivotal method for detecting and assessing defects, offering support for safety pre-warning and maintenance decisions in industrial structures. Originating from the 1980s, the demand for an NDT technique arose to inspect fatigue cracks at welded intersections in offshore underwater structures in the North Sea. Conventional NDT methods proved impractical in this distinct underwater environment with quantitative evaluation requirements, prompting the development of the ACFM technique by researchers in the mechanical engineering department at University College London. Over the past four decades, ACFM's theory model, inspection methods, and equipment have undergone rapid advancements, gaining widespread utilization in ocean engineering, the power industry, rail traffic, and special equipment fields. This book encompasses diverse facets, including the global development history of alternating current field measurement technology, core basic theory, signal processing methods, probe instrument development, standardization construction, and engineering applications. Serving as a valuable learning reference for students and offering fundamental theoretical guidance for scientific researchers, it also provides case introductions for engineering applications. The book aims to propel both theoretical research and practical applications of alternating current field measurement technology, contributing significantly to its popularization and widespread application.

This open access book can be divided into three parts. In part 1, three articles are employed to introduce the RACFM technology. In part 2, two articles are introduced to explain the Multifrequency ACFM. In part 3, three articles are introduced to explain the visualization research in ACFM. With the development of ACFM detection technology, traditional single excitation frequency and single direction excitation structures cannot meet the requirements of multiple types of defect detection (such as cracks at different angles, and buried defects). New types of excitation structures and methods have been proposed, mainly including rotating electromagnetic field detection, multi-frequency detection, and defects visual algorithm. The changes in the excitation structure and signal mentioned above have expanded the scope of application of ACFM detection and provided opportunities for the cross-integration and innovation of ACFM detection technology with other advanced detection methods. This book mainly focuses on the study of the rotating alternating current field measurement (RACFM), the multifrequency ACFM, and the visualization method in ACFM.

Mixed-flow Pumps Modeling, Simulation, and Measurements Learn to improve and optimize the design and operation of mixed-flow pumps Mixed-flow pumps have a huge range of applications in agriculture, hydroelectric power, and other industries that incorporate fluid transport. They are centrifugal pumps incorporating the characteristics of both axial and radial pumps to increase the flow rate and discharge pressure. Though essential in a variety of industries, they pose serious challenges to numerical simulation methods, challenges which are starting to be met by the application of computational fluid dynamics using high-performance computing. Mixed-flow Pumps introduces engineers and researchers to this subject and its important applications. Incorporating all major varieties of mixed-flow pumps used in industrial applications, it employs methods from advanced computational fluid dynamics and high-precision flow field experimentation to characterize and analyze these crucial technologies. Moving from the fundamentals of the technology to its most advanced applications, it’s an essential resource for engineers and industry practitioners looking to develop their understanding of fluid transport. Mixed-flow Pumps readers will also find: Detailed information on how to design and optimize mixed-flow pumps to meet the increasingly stringent industry demands Detailed information on energy performance tests and experiments, methods for data analysis, entropy production theory, CFD solutions using Reynolds-Averaged Navier-Stokes (RANS) equations, and more An authoritative team with immense global experience in flow pumps and broader industrial experience Mixed-flow Pumps is a useful reference for mixed-flow pump design by academic researchers, including graduate students, industry practitioners, and test engineers.

Congenital heart disease is gaining importance as a condition that effects not only the pediatric population but also the adult population, as many congenital cardiac conditions remain silent for years until accidentally discovered on routine check up. Echocardiography in Adult Congenital Heart Disease provides cardiologists with access to the wealth of imaging from the Royal Brompton Hospital and National Heart and Lung Institute in London to enable them to improve on their own skills and refine their imaging technique. The authors correlate this echocardiography experience with the pathological and surgical aspects of congenital heart defects.

Congenital heart disease is gaining importance as a condition that effects not only the pediatric population but also the adult population, as many congenital cardiac conditions remain silent for years until accidentally discovered on routine check up. Echocardiography in Adult Congenital Heart Disease provides cardiologists with access to the wealth of imaging from the Royal Brompton Hospital and National Heart and Lung Institute in London to enable them to improve on their own skills and refine their imaging technique. The authors correlate this echocardiography experience with the pathological and surgical aspects of congenital heart defects.

This book explores metonymic patterns in Li Bai’s poetry from a cognitive poetic perspective and offers new insights into the use of metonymies in poetry more widely. Focusing more specifically on Annotations to the Annals of the Complete Collection of Li Bai compiled by A Qi, it sheds light on the poetic style of one of the most celebrated poets of China’s Tang Dynasty (610-907 AD). Adopting corpus-based and introspection methods, this book builds a metonymy identification procedure that takes into account the social and cultural context and the stylistic characteristics of Tang poetry, classifies the metonymies into different categories, and examines their roles and functions. The author reveals how Li Bai’s metonymies reflect the poet’s evolution as his style shifts from romanticism to realism. She also reflects on how they act as a lens through which readers can learn about hierarchical structures, wine, dress and agriculture in the Tang Dynasty. Approaching Li Bai’s poetry from a fresh angle, this volume contributes to the study of classical Chinese literature and offers implications for the appreciation, translation and teaching of Li Bai’s poetry.

The concept of communicative competence has been rendered as context-abstracted code-bound knowledge for language teaching and assessment. This Element offers a different perspective on 'communication' and 'competence'. Part I offers the rationale for this re-orientation. Part II examines the conceptual and pedagogic affordances and delimitations of the prevailing approach to communicative competence; Part III describes a conceptual re-framing of language use as ecological languaging in terms of embodied, situation-sensitive action through which people coordinate with others, artefacts, and environments; Part IV explores assessment approaches built on Bayesian principles for tracking learner development and progress by taking account of prior accomplishment, expert opinion, and emerging performance to create probabilistic trajectories; Part V focusses on professional developments related to conceptual refinement, curriculum design, teaching materials, and teacher education. Part VI considers some key future challenges. This title is also available as Open Access on Cambridge Core.

The concept of communicative competence has been rendered as context-abstracted code-bound knowledge for language teaching and assessment. This Element offers a different perspective on 'communication' and 'competence'. Part I offers the rationale for this re-orientation. Part II examines the conceptual and pedagogic affordances and delimitations of the prevailing approach to communicative competence; Part III describes a conceptual re-framing of language use as ecological languaging in terms of embodied, situation-sensitive action through which people coordinate with others, artefacts, and environments; Part IV explores assessment approaches built on Bayesian principles for tracking learner development and progress by taking account of prior accomplishment, expert opinion, and emerging performance to create probabilistic trajectories; Part V focusses on professional developments related to conceptual refinement, curriculum design, teaching materials, and teacher education. Part VI considers some key future challenges. This title is also available as Open Access on Cambridge Core.

Intelligent railway alignment design offers a comprehensive exploration of intelligent railway alignment optimization It considers a a variety of critical topics, starting with the optimal selection of key technical standards for railway design, and then introduces the comprehensive geographic information model. The methods for evaluating the suitability of the railway alignment based on the comprehensive geographic information model are discussed, together with economic optimization models aimed at cost-effective railway alignment design. In addition, the book considers optimization models for managing risks related to typical geological hazards and minimizing environmental impacts. Intelligent search algorithms for solving the railway alignment optimization models are explained in detail, including corridor searching algorithms and 3D alignment searching algorithms. Additionally, the book explores concurrent optimization strategies for coordinating railway alignments with stations and large temporary engineering projects. Finally, it introduces intelligent models and methods for reconstructing and optimizing existing railway alignments, ensuring that both new and updated railways operate efficiently and sustainably.

Etsitkö jännitystä, uusia näkökulmia tai rentouttavaa lukuelämystä? Tutustu kirjakategorioihimme ja löydä seuraava suosikkikirjasi.

This book series consists of two parts, decidable description logics and undecidable description logics. It gives the R-calculi for description logics. This book offers a rich blend of theory and practice. It is suitable for students, researchers and practitioners in the field of logic.

Die in der buddhistischen Welt ausserst populare Heiligenlegende von der Schwanfrau Manohara und dem Prinzen Sudhana, das sogenannte Sudhanavadana, ist in zahlreichen Versionen uberliefert. Li Weis Studie konzentriert sich auf den altesten Textzeugen der sogenannten Divyavadana-Rezension, die chinesische Ubersetzung des Yijing, und hat zum Ziel, die von Yijing als Quelle benutzte, aber nicht erhaltene Sanskritvorlage zu rekonstruieren. Zu diesem Zweck wird Yijing's chinesische Fassung mit dem heute vorliegenden Sanskrittext, wie er im Bhaisajyavastu des Mula-sar-vas-tivada-Vi-na-ya-va-stu der Gilgit Manuscripts und im Sudhanavadana des Divyavada-na greifbar wird, verglichen. Li Weis Rekonstruktion der Sanskritvorlage gliedert sich in drei Teile: Die textkritische Einleitung erarbeitet ein Stemma, das Yijing's Standort innerhalb der Mulasarvastivada-Tradition bestimmt. Es folgt, im zweiten Teil, die Synopse. Diese enthalt jeweils das chinesische Original, das sowohl in chinesischen Zeichen als auch in Pinyin-Transkription dargeboten wird, zusammen mit der deutschen Ubersetzung. Yijing's chinesischer Text ist hier zum ersten Mal in eine westliche Sprache ubersetzt. Dem chinesischen Text wird der uberlieferte Sanskrittext synoptisch gegenubergestellt. Der dritte Teil liefert ein vollstandiges Glossar Chinesisch-Deutsch-Sanskrit. Hier wird Yijing's Sprache, die bislang nur sehr unzureichend in Worterbuchern und Glossaren des buddhistischen Chinesisch erfasst ist, lexikographisch aufgeschlusselt. Die vollstandigen Stellenangaben ermoglichen u.a. die genauere sprachliche Analyse schwieriger Textstellen im jeweiligen Textvergleich.