The electromagnetic properties of high temperature superconductors(HTS)are characterized with the explicit intent to improve their integration in electric power systems.A tape and a coil made of Bismuth Strontium Calc...The electromagnetic properties of high temperature superconductors(HTS)are characterized with the explicit intent to improve their integration in electric power systems.A tape and a coil made of Bismuth Strontium Calcium Copper Oxide(BSCCO)are considered in the presence of electromagnetically active materials in order to mimic properly the electromagnetic environment typical of electrical machines.The characterization consists of the determining the critical current and the AC losses at different values of the frequency and the transport current.The effects induced by the proximity of the active materials are studied and some related experimental issues are analyzedc.展开更多
Calcium alginate gel（CAG） has been shown to successfully model aneurysm embolization within a short period of time.However,gradually degrading CAG potentially results in aneurysm recanaliza-tion.In the present study...Calcium alginate gel（CAG） has been shown to successfully model aneurysm embolization within a short period of time.However,gradually degrading CAG potentially results in aneurysm recanaliza-tion.In the present study,a regenerative embolic material was designed by seeding rat fibroblasts in a CAG.The study investigated the feasibility of constructing a 3-dimensional culture system.The fibroblasts grew well and firmly attached to the CAG.CAG was conducive for fibroblast growth,and resulted in a 3-dimensional culture system.Results show that CAG can be used theoretically as a vascular,regenerative,embolic material.展开更多
A topology optimization method based on the solid isotropic material with penalization interpolation scheme is utilized for designing gradient coils for use in magnetic resonance microscopy.Unlike the popular stream f...A topology optimization method based on the solid isotropic material with penalization interpolation scheme is utilized for designing gradient coils for use in magnetic resonance microscopy.Unlike the popular stream function method,the proposed method has design variables that are the distribution of conductive material.A voltage-driven transverse gradient coil is proposed to be used as micro-scale magnetic resonance imaging(MRI)gradient coils,thus avoiding introducing a coil-winding pattern and simplifying the coil configuration.The proposed method avoids post-processing errors that occur when the continuous current density is approximated by discrete wires in the stream function approach.The feasibility and accuracy of the method are verified through designing the z-gradient and y-gradient coils on a cylindrical surface.Numerical design results show that the proposed method can provide a new coil layout in a compact design space.展开更多
文摘The electromagnetic properties of high temperature superconductors(HTS)are characterized with the explicit intent to improve their integration in electric power systems.A tape and a coil made of Bismuth Strontium Calcium Copper Oxide(BSCCO)are considered in the presence of electromagnetically active materials in order to mimic properly the electromagnetic environment typical of electrical machines.The characterization consists of the determining the critical current and the AC losses at different values of the frequency and the transport current.The effects induced by the proximity of the active materials are studied and some related experimental issues are analyzedc.
文摘Calcium alginate gel（CAG） has been shown to successfully model aneurysm embolization within a short period of time.However,gradually degrading CAG potentially results in aneurysm recanaliza-tion.In the present study,a regenerative embolic material was designed by seeding rat fibroblasts in a CAG.The study investigated the feasibility of constructing a 3-dimensional culture system.The fibroblasts grew well and firmly attached to the CAG.CAG was conducive for fibroblast growth,and resulted in a 3-dimensional culture system.Results show that CAG can be used theoretically as a vascular,regenerative,embolic material.
基金Project supported by the National Natural Science Foundation of China(Grant Nos.51675506 and 51275504)the German Research Foundation(DFG)(Grant Nos.#ZA 422/5-1 and#ZA 422/6-1)
文摘A topology optimization method based on the solid isotropic material with penalization interpolation scheme is utilized for designing gradient coils for use in magnetic resonance microscopy.Unlike the popular stream function method,the proposed method has design variables that are the distribution of conductive material.A voltage-driven transverse gradient coil is proposed to be used as micro-scale magnetic resonance imaging(MRI)gradient coils,thus avoiding introducing a coil-winding pattern and simplifying the coil configuration.The proposed method avoids post-processing errors that occur when the continuous current density is approximated by discrete wires in the stream function approach.The feasibility and accuracy of the method are verified through designing the z-gradient and y-gradient coils on a cylindrical surface.Numerical design results show that the proposed method can provide a new coil layout in a compact design space.
