在Mum ford-Shah模型和Yoon Mo Jung等提出的分割模型的基础上,利用分段常数水平集方法,提出了一个新的多相位分割模型。新模型输出一个多相位的分布图象,并可以容易地提取每个单独的相位,有一定的抗噪音能力。利用最速下降算法求解总...在Mum ford-Shah模型和Yoon Mo Jung等提出的分割模型的基础上,利用分段常数水平集方法,提出了一个新的多相位分割模型。新模型输出一个多相位的分布图象,并可以容易地提取每个单独的相位,有一定的抗噪音能力。利用最速下降算法求解总变差最小化问题。引进了一个函数确定模型中的参数值,加速了算法的收敛速度。数值试验表明新模型有很好的分割效果且能准确地处理含T-交汇的图象。展开更多
The isothermal section of Ag-Ti-Zr ternary system at 1023 K was determined by diffusion triple and electron probe microanalysis. The results indicate that four binary intermetallic phases of AgTi, AgTi2, AgZr and AgZr...The isothermal section of Ag-Ti-Zr ternary system at 1023 K was determined by diffusion triple and electron probe microanalysis. The results indicate that four binary intermetallic phases of AgTi, AgTi2, AgZr and AgZr2 are found in Ag-Ti-Zr ternary system at 1 023 K. AgZr2 and AgTi2 form a continuous solid solution, namely Ag(Ti,Zr)2. Four three-phase regions: AgTi +AgZr + Ag, AgTi +AgZr + Ag (Ti, Zr)2, α-Zr +β(Ti, Zr) + Ag (Ti, Zr) 2 and α-Ti +β(Ti, Zr) + Ag (Ti, Zr)2 exist in the isothermal section. No ternary compound is observed.展开更多
文摘在Mum ford-Shah模型和Yoon Mo Jung等提出的分割模型的基础上,利用分段常数水平集方法,提出了一个新的多相位分割模型。新模型输出一个多相位的分布图象,并可以容易地提取每个单独的相位,有一定的抗噪音能力。利用最速下降算法求解总变差最小化问题。引进了一个函数确定模型中的参数值,加速了算法的收敛速度。数值试验表明新模型有很好的分割效果且能准确地处理含T-交汇的图象。
基金Projects(50371104 50401011) supported by the National Natural Science Foundation of China
文摘The isothermal section of Ag-Ti-Zr ternary system at 1023 K was determined by diffusion triple and electron probe microanalysis. The results indicate that four binary intermetallic phases of AgTi, AgTi2, AgZr and AgZr2 are found in Ag-Ti-Zr ternary system at 1 023 K. AgZr2 and AgTi2 form a continuous solid solution, namely Ag(Ti,Zr)2. Four three-phase regions: AgTi +AgZr + Ag, AgTi +AgZr + Ag (Ti, Zr)2, α-Zr +β(Ti, Zr) + Ag (Ti, Zr) 2 and α-Ti +β(Ti, Zr) + Ag (Ti, Zr)2 exist in the isothermal section. No ternary compound is observed.
