The paper presents an innovative renewable energy-load management technology, which is currently being developed as a prototype, in preparation for potential large-scale implementation in power systems. The new techno...The paper presents an innovative renewable energy-load management technology, which is currently being developed as a prototype, in preparation for potential large-scale implementation in power systems. The new technology employs controlled motion of large weights, which are being maneuvered （up and down） through the system peak/off-peak demand pattern. The load management scheme is similar to the pumping storage systems, but uses large weights instead of water and, therefore, is more suited to the operating environment in Saudi Arabia, in which water is relatively scarce. A portion of the off-peak valley-filling energy is supplied from wind-driven generators, which adds to the green energy component of the scheme. The controlled motion aspect of the new technology is based on partial implementation of previously published ideas by the authors as well as a registered patent. The paper describes the theoretical and analytical features of the introduced renewable energy-load management technology, and dwells on its practical implementation features.展开更多
Against the backdrop of Chinese culture, this paper offers a localized explanation of the Western concept of ＂archetypal criticism.＂ It proposes that four ＂thematic archetypes＂ can be observed in the relations bet...Against the backdrop of Chinese culture, this paper offers a localized explanation of the Western concept of ＂archetypal criticism.＂ It proposes that four ＂thematic archetypes＂ can be observed in the relations between folklore, legends and the novel in the new era （since reform and opening up） in China. The first is the coexistence of man and nature; the second, enduring suffering and realizing one＇s poterltial; the third, discontent with reality expressed in writing about imaginary worlds; and the last, criticism of the materialistic personality which places material gain above justice and lusts after gain. The presentation, dynamics of change, practical and cultural meanings and aesthetic values of these ＂thematic archetypes＂ in the novels of the new era reveal writers＇ reflections on ＂modernity＂ and the awakening of aesthetic consciousness in relation to their own land. This paper also argues that the world outlook that pursues harmony between man and nature, the view of life that prefers justice to material gain, and the values that affirm morality, life and human dignity contained in traditional Chinese folk culture and literature may supply us with important spiritual resources for responding to contemporary life, rebuilding the poetry of life and raising the quality of culture.展开更多
Oxide heterointerface is a platform to create unprecedented two-dimensional electron gas, superconductivity and ferromagnetism, arising from a polar discontinuity at the interface. In particular, the ability to tune t...Oxide heterointerface is a platform to create unprecedented two-dimensional electron gas, superconductivity and ferromagnetism, arising from a polar discontinuity at the interface. In particular, the ability to tune these intriguing effects paves a way to elucidate their fundamental physics and to develop novel electronic/magnetic devices. In this work, we report for the first time that a ferroelectric polarization screening at SrTiO_(3)/PbTiO_(3) interface is able to drive an electronic construction of Ti atom, giving rise to room-temperature ferromagnetism. Surprisingly, such ferromagnetism can be switched to antiferromagnetism by applying a magnetic field, which is reversible. A coupling of itinerant electrons with local moments at interfacial Ti3d orbital was proposed to explain the magnetism. The localization of the itinerant electrons under a magnetic field is responsible for the suppression of magnetism. These findings provide new insights into interfacial magnetism and their control by magnetic field relevant interfacial electrons promising for device applications.展开更多
文摘The paper presents an innovative renewable energy-load management technology, which is currently being developed as a prototype, in preparation for potential large-scale implementation in power systems. The new technology employs controlled motion of large weights, which are being maneuvered （up and down） through the system peak/off-peak demand pattern. The load management scheme is similar to the pumping storage systems, but uses large weights instead of water and, therefore, is more suited to the operating environment in Saudi Arabia, in which water is relatively scarce. A portion of the off-peak valley-filling energy is supplied from wind-driven generators, which adds to the green energy component of the scheme. The controlled motion aspect of the new technology is based on partial implementation of previously published ideas by the authors as well as a registered patent. The paper describes the theoretical and analytical features of the introduced renewable energy-load management technology, and dwells on its practical implementation features.
文摘Against the backdrop of Chinese culture, this paper offers a localized explanation of the Western concept of ＂archetypal criticism.＂ It proposes that four ＂thematic archetypes＂ can be observed in the relations between folklore, legends and the novel in the new era （since reform and opening up） in China. The first is the coexistence of man and nature; the second, enduring suffering and realizing one＇s poterltial; the third, discontent with reality expressed in writing about imaginary worlds; and the last, criticism of the materialistic personality which places material gain above justice and lusts after gain. The presentation, dynamics of change, practical and cultural meanings and aesthetic values of these ＂thematic archetypes＂ in the novels of the new era reveal writers＇ reflections on ＂modernity＂ and the awakening of aesthetic consciousness in relation to their own land. This paper also argues that the world outlook that pursues harmony between man and nature, the view of life that prefers justice to material gain, and the values that affirm morality, life and human dignity contained in traditional Chinese folk culture and literature may supply us with important spiritual resources for responding to contemporary life, rebuilding the poetry of life and raising the quality of culture.
基金supported by the National Natural Science Foundation of China (U1909212, U1809217, and 11474249)supported by the U.S. Department of Energy, Office of Basic Energy Science, Division of Materials Sciences and Engineering (Ames Laboratory is operated for the U.S. Department of Energy by Iowa State University under Contract No. DE-AC02-07CH11358)。
文摘Oxide heterointerface is a platform to create unprecedented two-dimensional electron gas, superconductivity and ferromagnetism, arising from a polar discontinuity at the interface. In particular, the ability to tune these intriguing effects paves a way to elucidate their fundamental physics and to develop novel electronic/magnetic devices. In this work, we report for the first time that a ferroelectric polarization screening at SrTiO_(3)/PbTiO_(3) interface is able to drive an electronic construction of Ti atom, giving rise to room-temperature ferromagnetism. Surprisingly, such ferromagnetism can be switched to antiferromagnetism by applying a magnetic field, which is reversible. A coupling of itinerant electrons with local moments at interfacial Ti3d orbital was proposed to explain the magnetism. The localization of the itinerant electrons under a magnetic field is responsible for the suppression of magnetism. These findings provide new insights into interfacial magnetism and their control by magnetic field relevant interfacial electrons promising for device applications.
