Heterodyne Optical Time Domain Reflectometer Combined With Active Loss Compensation: A Practical Tool for Investigating Fermi Pasta Ulam Recurrence Process and Breathers Dynamics in Optical Fibers

We report recent results obtained with a novel optical fiber experimental setup based on a heterodyne optical time-domain reflectometer in the context of FPU recurrence process. Moreover, we actively compensate the dissipation of the system. We show that we can observe several FPU recurrences by monitoring the power and relative phase evolutions of the main discrete frequency components involved in the process.

Aging bone

This review article deals with the topic of changes in bone tissue in the process of aging of the body. Adipogenesis and osteogenesis are affected at the molecular level, proteins and genes are described, in which somatic mutation can occur during the aging process, resulting in both minor changes and an active loss of bone mineral density. The factors that affect the change in bone mineral density mainly in the elderly, and existing drugs that can slow down osteoporosis are listed. Knowledge of the cellular and molecular mechanisms underlying the aging of bone tissue will contribute to the creation of targeted therapy for osteoporosis, which slows down bone aging and prevents falls and fractures in the elderly people.

Optimum Dispatching of Wind Farm Turbines Based on DFIGs

With the development of concentrated wind power areas, new energy’s dispatching problems are more prominent with its fast expansion. However, we can maximize the utilization of wind power under power curtailment conditions by optimal wind power dispatching. The paper studies on the basic theories of wind power turbines, and analyses the power’s control and output characteristics of wind turbine. By studying the unit commitment of wind turbines, this paper provides a strategy for optimal dispatch in wind power generation. The calculation results show that the total active and reactive power output of the wind farm match the request of dispatch center. And the total active loss and total reactive loss is the least in the meantime.