The key issues that must be considered in developing "prestige" UV protection products are discussed, with particular emphasis on the importance of the active ingredients. A new development in TiO\-2 technol...The key issues that must be considered in developing "prestige" UV protection products are discussed, with particular emphasis on the importance of the active ingredients. A new development in TiO\-2 technology, leading to improved transparency on skin, is described.展开更多
Art students, as a whole, have a variety of learning style of sensory receivers. The Variety of learning styles requires the variety of teaching strategies. The analysis of learners＇ learning styles is one of the fac...Art students, as a whole, have a variety of learning style of sensory receivers. The Variety of learning styles requires the variety of teaching strategies. The analysis of learners＇ learning styles is one of the factors on which the design of learning strategies should be based. Matching teaching strategies and mismatching strategies are chosen intentionally according to the teaching contents, the teaching goals, and the learner＇s learning styles. Matching teaching strategies can reach the best result of teaching and learning. On the contrary, mismatching strategies can remedy the disadvantages caused by learning styles and be helpful for the development of learning styles.展开更多
Cognitive radio is being widely discussed,and resource allocation scheme is drawing a lot of attention.Although the existed resource allocation strategies have successfully enhanced spectrum efficiency,some critical c...Cognitive radio is being widely discussed,and resource allocation scheme is drawing a lot of attention.Although the existed resource allocation strategies have successfully enhanced spectrum efficiency,some critical challenges still remain unanswered such as the jointly consideration of the efficiency and fairness,the rational description of the spectrum resources,and the execution mode of the spectrum allocation.This paper presents a system level dynamic frequency spectrum allocation scheme based on a central heterogeneous network architecture,evaluates the matching degree of the spectrum demand and the available spectrum resources with corresponding matrices,jointly considers the efficiency and fairness of different cognitive radio systems.Simulation results and the application scenario are also presented and analyzed.展开更多
文摘The key issues that must be considered in developing "prestige" UV protection products are discussed, with particular emphasis on the importance of the active ingredients. A new development in TiO\-2 technology, leading to improved transparency on skin, is described.
文摘Art students, as a whole, have a variety of learning style of sensory receivers. The Variety of learning styles requires the variety of teaching strategies. The analysis of learners＇ learning styles is one of the factors on which the design of learning strategies should be based. Matching teaching strategies and mismatching strategies are chosen intentionally according to the teaching contents, the teaching goals, and the learner＇s learning styles. Matching teaching strategies can reach the best result of teaching and learning. On the contrary, mismatching strategies can remedy the disadvantages caused by learning styles and be helpful for the development of learning styles.
文摘Cognitive radio is being widely discussed,and resource allocation scheme is drawing a lot of attention.Although the existed resource allocation strategies have successfully enhanced spectrum efficiency,some critical challenges still remain unanswered such as the jointly consideration of the efficiency and fairness,the rational description of the spectrum resources,and the execution mode of the spectrum allocation.This paper presents a system level dynamic frequency spectrum allocation scheme based on a central heterogeneous network architecture,evaluates the matching degree of the spectrum demand and the available spectrum resources with corresponding matrices,jointly considers the efficiency and fairness of different cognitive radio systems.Simulation results and the application scenario are also presented and analyzed.
