High quality, concentrated sugar syrup crystal is produced in a critical step in cane sugar production： the clarification process. It is characterized by two variables： the color of the produced sugar and its clarit...High quality, concentrated sugar syrup crystal is produced in a critical step in cane sugar production： the clarification process. It is characterized by two variables： the color of the produced sugar and its clarity degree. We show that the temporal variations of these variables follow power-law distributions and can be well modeled by multiplicative cascade multifractal processes. These interesting properties suggest that the degradation in color and clarity degree has a systemwide cause. In particular, the cascade multifractal model suggests that the degradation in color and clarity degree can be equivalently accounted for by the initial ＂impurities＂ in the sugarcane. Hence, more effective cleaning of the sugarcane before the clarification stage may lead to substantial improvement in the effect of clarification.展开更多
Due to high theoretical capacity and low lithium-storage potential,silicon(Si)-based anode materials are considered as one kind of the most promising options for lithium-ion batteries.However,their practical applicati...Due to high theoretical capacity and low lithium-storage potential,silicon(Si)-based anode materials are considered as one kind of the most promising options for lithium-ion batteries.However,their practical applications are still limited because of significant volume expansion and poor conductivity during cycling.In this study,we prepared a double core shell nanostructure through coating commercial Si nanoparticles with both amorphous titanium dioxide(a-TiO_(2))and amorphous carbon(a-C)via a facile sol gel method combined with chemical vapor deposition.Elastic behaviors of a-TiO_(2) shells allowed for the release of strain,maintaining the integrity of Si cores during charge discharge processes.Additionally,outer layers of a-C provided numerous pore channels facilitating the transport of both Lit ions and electrons.Using the distribution of relaxation time analysis,we provided a precise kinetic explanation for the observed electrochemical behaviors.Furthermore,the structural evolution of the anode was explored during cycling processes.The Si@a-TiO_(2)@a-C-6 anode was revealed to exhibit excellent electrochemical properties,achieving a capacity retention rate of 86.7%(877.1 mA·h·g^(-1) after 500 cycles at a 1 A·g^(-1)).This result offers valuable insights for the design of high-performance and cyclically stable Si-based anode materials.展开更多
文摘High quality, concentrated sugar syrup crystal is produced in a critical step in cane sugar production： the clarification process. It is characterized by two variables： the color of the produced sugar and its clarity degree. We show that the temporal variations of these variables follow power-law distributions and can be well modeled by multiplicative cascade multifractal processes. These interesting properties suggest that the degradation in color and clarity degree has a systemwide cause. In particular, the cascade multifractal model suggests that the degradation in color and clarity degree can be equivalently accounted for by the initial ＂impurities＂ in the sugarcane. Hence, more effective cleaning of the sugarcane before the clarification stage may lead to substantial improvement in the effect of clarification.
基金support from the National Natural Science Foundation of China(Grant Nos.22238012,22178384,22108301,and 22408398)the Science Foundation of China University of Petroleum,Beijing(Grant No.ZX20230242).
文摘Due to high theoretical capacity and low lithium-storage potential,silicon(Si)-based anode materials are considered as one kind of the most promising options for lithium-ion batteries.However,their practical applications are still limited because of significant volume expansion and poor conductivity during cycling.In this study,we prepared a double core shell nanostructure through coating commercial Si nanoparticles with both amorphous titanium dioxide(a-TiO_(2))and amorphous carbon(a-C)via a facile sol gel method combined with chemical vapor deposition.Elastic behaviors of a-TiO_(2) shells allowed for the release of strain,maintaining the integrity of Si cores during charge discharge processes.Additionally,outer layers of a-C provided numerous pore channels facilitating the transport of both Lit ions and electrons.Using the distribution of relaxation time analysis,we provided a precise kinetic explanation for the observed electrochemical behaviors.Furthermore,the structural evolution of the anode was explored during cycling processes.The Si@a-TiO_(2)@a-C-6 anode was revealed to exhibit excellent electrochemical properties,achieving a capacity retention rate of 86.7%(877.1 mA·h·g^(-1) after 500 cycles at a 1 A·g^(-1)).This result offers valuable insights for the design of high-performance and cyclically stable Si-based anode materials.
