WWDC26：2026 年 6 月 8 日至 12 日 (太平洋时间)

We show that thick spectral walls exist in antikink-kink collisions in the $φ^6$ model. In this model, they are triggered by the so-called $delocalized$ $modes$ which do not exist in the single-soliton sector but emerge in antikink-kink ($\bar{K}K$) collisions. Therefore, spectral walls are a rather common phenomenon that should occur in many solitonic collisions involving non-symmetric kinks as, e.g., in the $φ^8$ or higher power models.

备受业界人士关注的2006国际线路板及电子组装展览会于2006年12月6日至12月8日在中国东莞厚街广东现代国际展览中心隆重举行。随着12月6日的一声炮响，本届展览会顺利开幕，盛大的开幕仪式预示着展会的空前盛况与巨大成功，开幕式结束后，香港线路板协会主席与美国IPC协会主席以及展委会会长一行十余人一起参观并巡视了展览会。

We construct a pair of non-commutative rank 8 association schemes from a rank 3 non-symmetric association scheme. For the pair, two association schemes have the same character table but different Frobenius-Schur indicators. This situation is similar to the pair of the dihedral group and the quaternion group of order 8. We also determine the structures of adjacency algebras of them over the rational number field.

我厂于1990年8月、10月分别利用6~#炉,4~#炉大修的机会,将原宝塔型炉篦更换为资江氮肥厂产的均布型炉篦及锦西化机厂产的JM-1型炉篦。新炉篦在试烧过程中,4~#炉曾以土焦、宁夏大块煤为原料,6~#炉曾以晋城大块煤、宁夏大块煤为原料。在1990年12月12日至15日对4~#.6~#炉进行了全面测定。

We analyze the complex dynamics dynamics of a family of $\mathbb{Z}_{12}-$equivariant planar systems, by using their reduction to an Abel equation. We derive conditions in the parameter space that allow uniqueness and hyperbolicity of a limit cycle surrounding either $1,~13$ or $25$ equilibria.

对外汉语教学的定性、定位、定量问题座谈会侧记疏影由中国对外汉语教学学会、《世界汉语教学》编辑部、《语言教学与研究》编辑部联合举办的“对外汉语教学的定性、定位、定量问题座谈会”１９９４年１２月６日至８日在北京第二外国语学院召开。来自全国十几所院校和单位...

Liu and Piccirillo developed a combinatorial argument that employs the 10/8-theorem to demonstrate that certain manifolds cannot be obtained via Dehn surgery on a knot. We extend their approach by creating additional examples using chainmail links.