Resultaten voor 'ma jian'

1. Gexiang , Zhang
2. Sergey , Verlan
3. Tingfang , Wu

Spiking Neural P Systems

Spiking neural P systems represent a significant advancement in the field of membrane computing, drawing inspiration from the communication patterns observed in neurons. Since their inception in 2006, these distributed and parallel neural-like computing models have gained popularity and emerged as important tools within the membrane computing area. As a key branch of the third generation of artificial neural networks, a fascinating research area of artificial intelligence, spiking neural P systems offer a captivating blend of theoretical elegance and practical utility. Their efficiency, Turing completeness, and real-life application characteristics, including interpretability and suitability for large-scale problems, have positioned them at the forefront of contemporary research in membrane computing and artificial intelligence. This state-of-the-art reference work is organized into three parts comprising twelve chapters. It thoroughly investigates the theoretical foundations, real-life applications, and implementations of spiking neural P systems. From fundamental principles to computational power and complexity, the theoretical aspects are explored, laying the groundwork for understanding their practical applications. Real-life applications span a diverse range of domains, including complex optimization, classification, fault diagnosis, medical image processing, information fusion, cryptography, and robot control. Additionally, the book discusses several software and hardware implementations that provide valuable insights into the practical deployment of spiking neural P systems. As the rapid development of spiking neural P systems continues to unfold, there is an increasing demand for a systematic and comprehensive summary of their capabilities and applications. This work serves as an invaluable resource for researchers, scholars, and practitioners interested in the theoretical underpinnings, algorithms, and practical implementation of artificial intelligence and membrane computing.

Spiral of Silence in the Social Media Era

This book is the first of its kind to apply a global perspective to Elisabeth Noelle-Neumann’s Spiral of Silence theory within the context of the social media era. Drawing on contributions from scholars across six countries, it offers a comparative analysis of how cultural norms and sociopolitical environments influence individuals' willingness to express their views online and offline. By contextualizing opinion expression through a cross-cultural lens, the volume addresses a significant gap in the literature—namely, the lack of holistic, internationally comparative research on public opinion dynamics in digital spaces. Contributors present the most current observations on factors shaping the "climate of opinion" in their respective national contexts. This approach enables a nuanced exploration of how users engage in or withdraw from public discussions, particularly around sensitive or politically charged issues. In doing so, the book rethinks assumptions about the universal applicability of the Spiral of Silence theory, emphasizing the importance of cultural variation in shaping communication behaviors and decisions. Importantly, the volume also interrogates the role of social media algorithms and emerging AI-driven systems in reinforcing or disrupting these dynamics. Algorithmic curation, recommendation engines, and content moderation tools shape the visibility of viewpoints, subtly influencing users’ perceptions of dominant opinion climates. These technological infrastructures can amplify majority opinions, suppress minority voices, and exacerbate the psychological mechanisms behind the spiral of silence—often without users being aware of their impact. The interplay of these digital systems with cultural and psychological factors forms a critical new dimension in understanding opinion formation in the 21st century. The book’s findings are globally relevant, particularly for societies experiencing high levels of migration and cultural diversity. It offers crucial insights into how migrants and culturally diverse communities participate in online public discourse, and whether their contributions are acknowledged or marginalized—an essential consideration for achieving inclusive social cohesion. By unpacking how, when, and why people across different cultural contexts engage in public expression, this book deepens our understanding of the true scope and shape of ‘public opinion’ in both digital and physical arenas.

1. Deshang , Sha
2. Peisong , Ma
3. Jiankun , Zhang

High Frequency Isolated Semi Dual Active Bridge DC-DC and AC-DC Converter

This book focus on the high frequency power conversion especially on high-frequency isolated DC-DC and single-stage AC-DC converters. Base on dual active bridge DC-DC conveters, two swiches are replaced by two diodes and this makes the DAB suit for unidirectional power flow applications. The shoot through issue can be avoided, the design can be simplified and the cost can be reduced. Compared with widely used high frequency isolated DC-DC converters operating under unidirectional power flow applications, semi DAB based DC-DC converters can achieve full load operating range ZVS for all switches with relying on auxiliary circuits and ZCS off for diodes. Besides, conversion efficiency can improved and optimized with different working conditions. The Semi DAB can be used for AC-DC power conversion. Although without mandatory inner current tracking loops, natural PFC can be obtained. With the proposed control strategies, ZVS for switches even for no load working condition in facing the variation of instantaneous AC grid voltage can be guaranteed. It presents new high frequency isolated unidirectional DC-DC and single-stage AC-DC topologies, advanced modulation and multimode power control methods to improve the performance of converters.The book provides valuable insights, advanced methods and practical design guides on the DC-DC and AC-DC conversion that can be considered in applications such as EV chargers, energy storage, emicrogrid and solid state transformers, it is a valuable resource for researchers, scientists and engineers in the field of high frequency isolated DC-DC and AC-DC converters.

1. Gexiang , Zhang
2. Sergey , Verlan
3. Tingfang , Wu

Spiking Neural P Systems

Spiking neural P systems represent a significant advancement in the field of membrane computing, drawing inspiration from the communication patterns observed in neurons. Since their inception in 2006, these distributed and parallel neural-like computing models have gained popularity and emerged as important tools within the membrane computing area. As a key branch of the third generation of artificial neural networks, a fascinating research area of artificial intelligence, spiking neural P systems offer a captivating blend of theoretical elegance and practical utility. Their efficiency, Turing completeness, and real-life application characteristics, including interpretability and suitability for large-scale problems, have positioned them at the forefront of contemporary research in membrane computing and artificial intelligence. This state-of-the-art reference work is organized into three parts comprising twelve chapters. It thoroughly investigates the theoretical foundations, real-life applications, and implementations of spiking neural P systems. From fundamental principles to computational power and complexity, the theoretical aspects are explored, laying the groundwork for understanding their practical applications. Real-life applications span a diverse range of domains, including complex optimization, classification, fault diagnosis, medical image processing, information fusion, cryptography, and robot control. Additionally, the book discusses several software and hardware implementations that provide valuable insights into the practical deployment of spiking neural P systems. As the rapid development of spiking neural P systems continues to unfold, there is an increasing demand for a systematic and comprehensive summary of their capabilities and applications. This work serves as an invaluable resource for researchers, scholars, and practitioners interested in the theoretical underpinnings, algorithms, and practical implementation of artificial intelligence and membrane computing.

1. Hongwei , Ma
2. Jianyun , Chai
3. Lie , Xu

The Control Principle of Wind Power Generation System

The book focuses on wind power generation systems. The control strategies have been addressed not only on ideal grid conditions but also on non-ideal grid conditions, which are more common in practice, such as kinds of asymmetrical grid conditions and weak grid conditions. This is achieved by providing in-depth study on a number of major topics such as mathematical models, modeling methods, dynamic characteristics on ideal grid condition and non-ideal grid conditions, advanced control strategies, and novel topologies. The comprehensive and systematic elaboration of wind power systems by a large number of original simulations and experimental results from the authors¿ research group is one of the major features of the book, which is particularly suited for readers who are interested in learning practical solutions to wind power systems. The book benefits researchers, engineers, graduate students, and senior undergraduate students in fields of electrical engineering, power electronics, wind power generation, etc.

1. Xiaozhen , Jiang
2. Mingtang , Lei
3. Wanfang , Zhou

Monitoring and Early Warning Technologies on Karst Lands

This book compiles a broad range of monitoring and early warning technologies focused on high-resolution in-situ water quality parameters at springs and monitoring wells. The surface collapses often cause severe damage to infrastructures, properties, and loss of lives, whereas contaminated groundwater poses risks to human health and the environment. Collapses are critical in karst systems, sparsing a seventh of Earth¿s land surface. Karsts are also very relevant for drinking water, yet karst represents a fourth of global drinking water. Mitigating collapses and contaminated groundwater in karst aquifers can be complicated and costly.These parameters detect hydrodynamics, internal soil erosion, and ground deformation changes as karst collapse and pollution proxies. This book represents the most comprehensive overview of decades of research on karst collapse and groundwater contamination.This book is of interest to researchers and policymakers.