Bücher von Bo Li

The book presents a broad and in-depth overview of recent achievements and the current state of research in magnetohydrodynamic (MHD) oscillatory and wave phenomena in the coronae of the Sun and stars. Major progress in coronal wave studies has been achieved thanks to the combination of high-precision multi-wavelength observations with spaceborne and ground-based facilities, elaborated theory of the interaction of MHD waves with plasma non-uniformities, state-of-the-art numerical simulations, and novel data analysis techniques. It has allowed the research community to reach a new look at the role played by MHD wave processes in the enigmatic phenomena of coronal plasma heating and wind acceleration as well as powerful energy releases such as flares and coronal mass ejections. In addition, the waves are intensively used as natural probes in the remote diagnostics of the coronal plasma parameters and physical processes operating in solar and stellar coronae via the method of MHD seismology. Individual chapters cover recent cutting-edge results obtained on the analysis and theoretical modelling of several most intensively studied coronal MHD wave phenomena, namely, kink and sausage oscillations of coronal loops and other field-aligned plasma structures, plus running and standing slow magnetoacoustic waves. A dedicated chapter assesses the reliability of proposed theoretical mechanisms for heating of the coronal plasma by MHD waves. Another chapter summarizes the current state of our understanding of the physical mechanisms and observational properties of quasi-periodic pulsations in solar flares, considers their analogy with similar processes detected in stellar flares, and thus establishes solid ground for the further exploitation of the solar-stellar analogy. An important discussion of novel data analysis techniques designed recently for MHD seismology applications is presented in a devoted chapter. The direction of future advances in the designated research areas are discussed.The book is a spin-off from the Topical Collection "Oscillatory Processes in Solar and Stellar Coronae" of the journal Space Science Reviews.

The volume comprises proceedings of the 10th International Conference on Recent Advances in Civil Aviation. The contents focus on air traffic control and management, quality control and reliability improvement of radio equipment and avionics, designing and testing aircraft assemblies and mechanisms, reliability improvement of aircraft management systems, aviation enterprise management, etc. There is also emphasis on the current problems and prospects for development of unmanned aircraft systems. This volume will be beneficial to researchers, practitioners, and policy-makers alike.

This book explores the problem of parsing long sentences, and Chinese is the target language. The result shows that the best performance is achieved by the algorithm using Chinese comma (algorithm 1) as the boundary of sub-sentence. It improves the overall accuracy and the accuracy on long distance dependency of the baseline parser by around 1.5% and 6.0% separately. According to the design of the parsing method, if a better baseline parser is adopted, the accuracy can be further improved according to the design of the parsing method.

The whole supply chain of natural gas, from the gas well through several kinds of elements to final customers, creates an integrated and complex network system. Such complex systems in Europe are owned and operated by different companies. The legal framework of liberalization of the energy markets requires gas network operators to publish flow capacities at their entry and exit stations. In combination with publicly available knowledge about the gas transportation infrastructures, an overall hydraulic simulation of the gas flows over Germany and Europe becomes possible. Considering the logistics and integrity of the natural gas supply system, it is obvious that such models are significant to present the overall gas flow, assess detailed infrastructures and analyze emergency situations based on national or European levels and from a technical point of view. In this thesis, the author depicts the workflow and methodologies of modeling such large scale and complex gas grids, using the German H-gas system as an example. The established model is able to simulate the major gas transmission systems in Germany, with consideration of the storage facilities. The modeling work is described in this thesis from three major aspects: the creation of network topology, the definition of simulation scenarios and the methodologies for capacity calculations. The author further explains in detail the integration of available databases and some simplification and assumption approaches developed for the modeling work. By investigating on German gas consumption sectors and gas demand behaviors over years, various scenarios are defined and simulated. Through the simulations, the technical potentials for both individual entry / exit points and the nationwide grid can be analyzed. The investigation in this thesis also illustrates several case studies to technically evaluate new infrastructures and German ¿energy transformation¿ technologies (e.g. synthetic methane from ¿Power¿töGas¿ projects and ¿Nuclear Moratorium¿). Some bottleneck areas in the existing gas transmission system under such newly developed conditions are presented in the model, which could provide good reference information for future pipeline grid extension and facilities enhancement.

electro/magnetic field aided laser process and supersonic laser deposition technology, are introduced in the book, to solve the common problems in quality control and low efficiency of the laser-only surface modification technology, high contamination and high consumption of the traditional surface modification technology.

This book introduces the engineering application of the discrete element method (DEM), especially the simulation analysis of the typical equipment (scraper conveyor, coal silos, subsoiler) in the coal and agricultural machinery.