This book focuses on the topology theory of mechanisms developed by the authors and provides a systematic method for the topology design of robot mechanisms. The main original theoretical contributions of this book include: A. Three basic concepts · The “geometrical constraint type of axes” is introduced as the third element of the topological structure of a mechanism. When it is combined with the other two elements, the kinematic pair and the connection of links, the symbolic expression of the topological structure is independent of the motion positions (except for the singularity positions) and the fixed coordinate system (Chapter 2). · The position and orientation characteristic (POC) set is used to describe the POC of the relative motion between any two links. The POC set, derived from the unit vector set of the velocity of a link, is only depend on the topological structure of a mechanism. Therefore, it is also independent of the motion positions and the fixed coordinate system (Chapter 3). · The single open chain (SOC) unit is the base unit of the topological structure used to develop the four basic equations of the mechanism topology (Chapters 2, 4–6). B. The mechanism composition principle based on the SOC units This book proposes a mechanism composition principle, based on the SOC units, to establish a systematic theory for the unified modeling of the topology, kinematics, and dynamics of mechanisms based on the SOC units (Chapter 7). C. Four basic equations • The POC equation of serial mechanisms with 10 symbolic operation rules (Chapter 4). • The POC equation of parallel mechanisms with 14 symbolic operation rules (Chapter 5). • The general DOF formula for spatial mechanisms (Chapter 6). • The coupling degree formula for the Assur kinematic chain (Chapter 7). D. One systematic method for the topology design of robot mechanisms (Chapters 8–10) Based on the three basic concepts and the four basic equations addressed above, this book puts forward a systematic method for the topology design of parallel mechanisms, which is fundamentally different from all existing methods. Its main characteristics are as follows: • The design process includes two stages: the first is structure synthesis, which derives many structure types; the second involves the performance analysis, classification and optimization of structure types derived from the first stage. • The design operation is independent of the motion positions and the fixed coordinate system. Therefore, the proposed method is essentially a geometrical method, which ensures the full-cycle DOF and the generality of geometric conditions of mechanism existence. • Each individual design step follows an explicit formula or the guidelines for design criteria, making the operation simple, feasible and reproducible. In addition, the topology design of the SCARA PMs is studied in detail to demonstrate the proposed method (Chapter 10).
Nonlinear Evolution Equation presents state-of-the-art theories and results on nonlinear evolution equation, showing related mathematical methods and applications. The basic concepts and research methods of infinite dimensional dynamical systems are discussed in detail. The unique combination of mathematical rigor and physical background makes this work an essential reference for researchers and students in applied mathematics and physics.
Describes the major architectures, standards, and technologies of Passive Optical Networks (PONs) The ComSoc Guide to Passive Optical Networks provides readers with a concise explanation of the key features of Passive Optical Networks (PONs); the different types of PON architectures and standards; key issues of PON devices, management, and implementation; and the promising business opportunities in access networks. Written for a broad audience, ranging from developers to users, this indispensable book provides an understanding o the evolutionary path of PON access systems and their positioning with respect to the cable, copper, and wireless competitors for broadband access networks. In addition, The ComSoc Guide to Passive Optical Networks: Provides brief, high-level overviews of the architectures and applications of Fiber-to-the-Home (FTTH) or Fiber-to-the-Curb (FTTC) access networks and the alternative HFC, subscriber line, and WiMAX access systems Awards readers with a clear understanding of what BPON, GPON, WDM-PON and EPON are and how they work, together with an introduction to their respective standards Carefully defines all acronyms and technical terms, making the book accessible to those who may not be specialists in this area Gives readers an appreciation of the last mile problems in telecommunications access networks, and the opportunities in optical-wireless integration
We study the multi-period container leasing and load acceptance problem in intermodal freight transportation, where the container capacity could be replenished before allocated to load orders with different profit levels. The container leasing decision is exogenously determined by the initial container inventory left unused from last period and the returned containers in the current period. The load acceptance decision involves trade-offs between accepting the order now or reserve the container for potential high profit level order in the future. Our objective is to characterize the optimal policies in order to maximize the total profit. The two-stage sequential decision problem is formulated as a stochastic dynamic programming problem. We show the optimal leasing quantity follows a base-stock policy and the optimal allocation for different class of demand follows a rationing policy. We further study the impact of demand variability on the optimal policy. Given stochastically higher demand in the future, both total profit and marginal value increase. Such change in demand also results in a higher leasing threshold and a higher rationing level for each demand class.
Those who suffer from "Three Yin Meridians", as recorded in the history books, are not only unable to practice martial arts for the rest of their lives, but almost none of them are lucky enough to live past the age of thirteen. Fate had closed all the doors to fortune, but it had opened up a window, allowing him to travel in circles. When he climbed to the peak of the mountains of corpses and seas of blood, he was shocked to discover a heaven-shaking secret. Looking back, he was surprised to find that the world he was standing on was like a grain of sand on the Ganges, like a speck of dust. Where to go...
Drawing on first-hand materials collected from the Chinese and Japanese literature as well as interviews with more than twenty filmmakers and scholars Kinnia Shuk-ting Yau provides a solid historical account of the complex interactions between Japanese and Hong Kong film industries from the 1930s to 1970s. The author describes in detail how Japan’s efforts during the 1930s and 1940s to produce a "Greater East Asian cinema" led to many different kinds of collaborations between the filmmakers from China, Hong Kong and Japan, and how such development had laid the foundation for more exchanges between the cinemas in the post-war period. The period covered by the book is the least understood period of the East Asian film history. Filling the gaps surrounding one of the most important but least understood periods of Asian film history this books discusses facts and resources once obscured by controversial issues related to wartime affairs with new insights and perspectives. This book is an invaluable source of information for understanding how the current East Asian film networks came into existence by looking beyond conventional single-case studies and adopting a transnational perspective in tracing the connections between different film industries.
Starting from impromptu variety shows hosted by Red Army officers for their soldiers in the late 1920s, this study follows the long effort by the CPC cultural leaders to create revolutionary songs and stage revolutionary dramas.
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