Bo Zhang

Ribose phosphate isomerase R (RpiR) is a transcriptional regulatory protein involved in the pentose phosphate pathway. Inactivation of the TCA cycle increases carbon flow into the pentose phosphate pathway where the RpiR protein family may be involved. In S. aureus, mutations of intracellular ribose sensing regulators (members of the RpiR family) resulted in changes in the synthesis of virulence factors. The inducer for ribose phosphate isomerase A, B and the mechanism by which RpiRa regulates rpiA, rpiB gene expression remain to be elucidated. The C-terminal domain of RpiRa was predicted to be a sugar isomerase binding protein domain using homology modeling and it was overexpressed and purified using an E. coli pET overrexpression system as a first step towards the structural determination of this protein.

Application of Nuclear Magnetic Resonance Based Metabolomics to Study the Central Metabolism of Staphylococci

Dongyuan Qiu

Sneak Circuits of Power Electronic Converters Sneak Circuits of Power Electronic Converters Work on sneak circuits and related analysis methods for power converters contributes to the reliability of power electronic systems worldwide. Most books on the subject focus on electronic systems; this book is perhaps the first to examine power electronic systems. The authors describe sneak circuit phenomena in power converters, introduce SCA methods for power electronic systems, and propose how to eliminate and make use of sneak circuits. This book: highlights the advanced research works in sneak circuit analysis by a leading author in the field is original in its treatment of power electronics converters, going beyond the electronic system level is suitable for both introductory and advanced levels offers guidelines for industry professionals involved in the design of power electronic systems, enabling early detection of potential problems This book is geared for researchers and graduate students in electrical engineering, as well as engineers and researchers in power electronics. Researchers in power electronics reliability will also find it to be a helpful resource.

Sneak Circuits of Power Electronic Converters

Xujian Shu

This book presents a concise and insightful view of the knowledge on fractional-order electrical circuits, which belongs to the subject of Electric Engineering and involves mathematics of fractional calculus. It offers an overview of fractional calculus and then describes and analyzes the basic theories and properties of fractional-order elements and fractional-order electrical circuit composed of fractional-order elements. Therein, the fundamental theorems, time-domain analysis, steady-state analysis, complex frequency domain analysis and state variable analysis of fractional-order electrical circuit are included. The fractional-order two-port networks and generalized fractional-order linear electrical circuits are also mentioned. Therefore, this book provides readers with enough background and understanding to go deeper into the topic of fractional-order electrical circuit, so that it is useful as a textbook for courses related to fractional-order elements, fractional-order electrical circuits, etc. This book is intended for students without an extensive mathematical background and is suitable for advanced undergraduate and graduate students, engineers and researchers who focus on the fractional-order elements, electrical circuits and systems.

Fractional-Order Electrical Circuit Theory

Zhong Li

Guidong Zhang

Research and application of impedance network converters are very popular in recent years, but it still lacks of understanding of and guidelines of impedance networks application, therefore, there is quiet a large potential market about impedance networks converters. This book can serve as a teaching material for graduates and guidelines for engineers as designing an impedance source converter. The main purpose of this book is to understand impedance networks of nonlinear switch circuits and impedance networks matching, which will further put forward understanding of all power converters in view of impedance networks. Taking the impedance network matchings into account leads to a set of criteria for designing an impedance source converter, which is to replace the traditional tedious, manual and experience-dependent design methods.

Designing Impedance Networks Converters

A New Method to Determine the Size of RVE Based on Failure in RVE

Jinliang He

Rong Zeng

Grounding is the fundamental measures to ensure the safeoperation of power systems, including power apparatus andcontrol/monitoring systems, and guarantee the personal safety.Grounding technology is an interdiscipline involving electricalengineering, high voltage technology, electric safety,electromagnetics, numerical analysis, and geologicalexploration Methodology and Technology for Power SystemGrounding: Covers all topics related to power system grounding Presents fundaments and theories of grounding systems Well balances technology and methodology related to groundingsystem design Helps to understand the grounding analysis softwares Highlights the advanced research works in the field ofgrounding systems Comprehensively introduces numerical analysis methods Discovers impulse ionization phenomenon of soil around thegrounding conductors Touches on lightning impulse characteristics of groundingdevices for towers and buildings As a comprehensive treatment of the topic, Methodology andTechnology for Power System Grounding is ideal for engineersand researchers in power system, lightning protection, andgrounding. The book will also better equip postgraduates, seniorundergraduate students in electrical engineering.

Methodology and Technology for Power System Grounding

Yanfeng Chen

This book focuses on the applications of Equivalent-Small-Parameter Method (ESPM) in solving the steady-state periodic solutions, as well as stability analysis, of kinds of open-loop or closed-loop operated DC/DC converters, such as PWM, quasi-resonant and resonant ones. The analytical expressions of DC components and harmonics of state variables (inductor current and capacitor voltage) with DC/DC converters can be obtained by ESPM, which can be helpful to understand the nonlinear operating mechanism of switched-mode converters. It can also be useful for stability analysis and design for practical converters. Modeling and analysis on all kinds of DC/DC converters are introduced in detail in this book, along with a large amount of simulation or experimental waveforms to verify the correctness of the theoretical analysis based on ESPM.

Equivalent-Small-Parameter Analysis of DC/DC Switched-Mode Converter

An all-in-one guide to high-voltage, multi-terminal converters, this book brings together the state of the art and cutting-edge techniques in the various stages of designing and constructing a high-voltage converter. The book includes 9 chapters, and can be classified into three aspects. First, all existing high-voltage converters are introduced, including the conventional two-level converter, and the multi-level converters, such as the modular multi-level converter (MMC). Second, different kinds of multi-terminal high-voltage converters are presented in detail, including the topology, operation principle, control scheme and simulation verification. Third, some common issues of the proposed multi-terminal high-voltage converters are discussed, and different industrial applications of the proposed multi-terminal high-voltage converters are provided. Systematically proposes, for the first time, the design methodology for high-voltage converters in use of MTDC grids; also applicable to constructing novel power electronics converters, and driving the development of HVDC, which is one of the most important technology areas Presents the latest research on multi-terminal high-voltage converters and its application in MTDC transmission systems and other industrially important applications Offers an overview of existing technology and future trends of the high-voltage converter, with extensive discussion and analysis of different types of high-voltage converters and relevant control techniques (including DC-AC, AC-DC, DC-DC, and AC-AC converters) Provides readers with sufficient context to delve into the more specialized topics covered in the book Featuring a series of novel multi-terminal high-voltage converters proposed and patented by the authors, Multi-terminal High Voltage Converters is written for researchers, engineers, and advanced students specializing in power electronics, power system engineering and electrical engineering.

Multi-Terminal High Voltage Converter

Xuemei Wang

Introduces chaos theory, its analytical methods and themeans to apply chaos to the switching power supplydesign DC-DC converters are typical switching systems which have plentyof nonlinear behaviors, such as bifurcation and chaos. Thenonlinear behaviors of DC-DC converters have been studied heavilyover the past 20 years, yet researchers are still unsure of thepractical application of bifurcations and chaos in switchingconverters. The electromagnetic interference (EMI), which resultedfrom the high rates of changes of voltage and current, has become amajor design criterion in DC-DC converters due to wide applicationsof various electronic devices in industry and daily life, and thequestion of how to reduce the annoying, harmful EMI has attractedmuch research interest. This book focuses on the analysis andapplication of chaos to reduce harmful EMI of DC-DC converters. After a review of the fundamentals of chaos behaviors of DC-DCconverters, the authors present some recent findings such asSymbolic Entropy, Complexity and Chaos Point Process, to analyzethe characters of chaotic DC-DC converters. Using these methods,the statistic characters of chaotic DC-DC converters are extractedand the foundations for the following researches of chaotic EMIsuppression are reinforced. The focus then transfers to estimatingthe power spectral density of chaotic PWM converters behind anintroduction of basic principles of spectrum analysis and chaoticPWM technique. Invariant Density, and Prony and Wavelet analysismethods are suggested for estimating the power spectral density ofchaotic PWM converters. Finally, some design-orientedapplications provide a good example of applying chaos theory inengineering practice, and illustrate the effectiveness onsuppressing EMI of the proposed chaotic PWM. Introduces chaos theory, its analytical methods and the meansto apply chaos to the switching power supply design Approaches the subject in a systematic manner from analyzingmethod, chaotic phenomenon and EMI characteristics, analyticalmethods for chaos, and applying chaos to reduce EMI(electromagnetic interference) Highlights advanced research work in the fields of statisticcharacters of nonlinear behaviors and chaotic PWM technology tosuppress EMI of switching converters Bridges the gap between numerical theory and real-worldapplications, enabling power electronics designers to both analyzethe effects of chaos and leverage these effects to reduce EMI

Bo Zhang

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