Substituting Fe with Co in Fe-based alloys to adjust the composition and optimize properties is a hot topic. Amorphous Fe84-xCoxZr7B9 (x = 0, 7, 14, 21, 28, 35, 42) ribbons were prepared and annealed at their first exothermic peak temperature. The crystallization and magnetic properties of the alloys can be divided into two regions. The first region corresponds to the Fe84-xCoxZr7B9 (x = 0, 7, 14,21) alloys, and the second region corresponds to the Fe84-xCoxZr7B9 (x = 28, 35, 42) alloys. There are four exothermic peaks for Fe84-xCoxZr7B9 (x = 0, 7, 14, 21) alloys, and there are three crystallization exothermic peaks for Fe84-xCoxZr7B9 (x = 28, 35, 42) alloys during crystallization. Only a single phase precipitates from the amorphous matrix for all alloys after annealing. With the increase in Co content, the lattice constant first increases up to 21 at.% Co and then decreases. The crystallization volume fraction (Vcry) and the grain size (D) continue to decrease. When the Co content is 21 at.%, there is little change in Co concentration between the nanocrystal and the remaining amorphous matrix. When the Co content is 42 at.%, the Fe content in the remaining amorphous matrix is significantly less than that in the nanocrystal, and the Co content in the remaining amorphous matrix is slightly higher than that in the nanocrystal. The content of Fe in the nanocrystal is higher than that of Co in the nanocrystal. The specific saturation magnetization M3 of as-quenched alloys and annealed alloys increases sharply up to 28 at.% Co and then decreases with a further increase in the Co content. The M3 values of annealed alloys are greater than those of as-quenched alloys. The coercivity Hc values of annealed alloys are lower than those of as-quenched alloys. For Fe84-xCoxZr7B9 (x = 0, 7, 14, 21) alloys, the higher the Co content, the higher the difference between the Hc values of as-quenched and annealed alloys. For Fe84-xCoxZr7B9 (x = 28, 35, 42) alloys, the difference between the Hc values of as-quenched and annealed alloys is small.

耀变体是一种非常活跃的活动星系核，研究它的有效谱指数是认识其内部结构和辐射机制的有效方法。文中数据采用目前已公布出的SMARTS数据库数据,共682组具有B,V,R,J,K波段的准同时性的观测数据，用LombScargle Periodogram（LSP）方法研究了其有效谱指数的特性，结果得出3C 454.3光学和红外波段光变之间呈正相关；光学和红外波段光变存在2个主导周期，分别约为1.2yr，4.5yr；双黑洞结构模型中双黑洞质量比为2/1 。

Fe64Co16Zr10B10 amorphous alloy prepared by a single roller melt spinning was annealed under isothermal treatment at temperatures ranging from 550 to 650 degrees C in a vacuum. Phase evolution and magnetic characteristic of Fe64Co16Zr10B10 amorphous alloy were investigated in detail by combining X-ray diffraction, transmission electron microscopy, scanning transmission electron microscopy/energy dispersive spectroscopy, and vibrating sample magnetometer. At 550 degrees C, the metastable intermediate alpha-Mn type phase precipitates, as well as an alpha-Fe(Co) phase. At 575 degrees C, only metastable alpha-Mn type phase is observed. Scanning transmission electron microscopy/energy dispersive spectroscopy indicates that the alpha-Mn type nanocrystals contain Fe, Co, and Zr. More Zr is at the interface between the nanocrystals and the amorphous matrix. There is little change in Co concentration among the remaining amorphous matrix, the nanocrystals, and the interface between the nanocrystals and the amorphous matrix. With a further increase in annealing temperature, the crystallization volume fraction of the alpha-Mn type phase decreases, and the crystallization volume fraction of the alpha-Fe(Co) phase increases accordingly. Coercivity of Fe64Co16Zr10B10 alloy undergoes a sharp rise above 550 degrees C and a sharp decline above 600 degrees C.