摘要：Graphitic carbon nitride(g-C_(3)N_(4))has emerged as a remarkably promising photocatalyst for addressing environmental and energy issues;however,it exhibits only moderate photocatalytic activity because of its low specific surface area and high recombination of *** of crystalline g-C_(3)N_(4) by the molten salt method has proven to be an effective method to improve the photocatalytic ***,crystalline g-C_(3)N_(4) prepared by the conventional molten salt method exhibits a less regular ***,highly crystalline g-C_(3)N_(4) hollow spheres(CCNHS)were successfully prepared by the molten salt method using cyanuric acid-melamine as a *** higher crystallization of the CCNHS samples not only repaired the structural defects at the surface of the CCNHS samples but also established a built-in electric field between heptazine-based g-C_(3)N_(4) and triazine-based g-C_(3)N_(4).The hollow structure improved the level of light energy utilization and increased the number of active sites for photocatalytic *** of the above characteristics,the as-prepared CCNHS samples simultaneously realized photocatalytic hydrogen evolution with the degradation of the plasticizer bisphenol *** research offers a new perspective on the structural optimization of supramolecular self-assembly.

摘要：某型装甲保障车的车体结构在复杂组合载荷作用下,必须同时满足强度和刚度等技术要求,有限元仿真技术为快速经济地实现这样的设计目标提供了可能.首先建立车体的三维实体有限元模型,其中对车体各部件之间复杂的接触条件和部件形状进行简化处理,给出车体结构承受的外挂部件重力,弹药发射冲击力、发动机离心力和最大输出扭矩等载荷的等效静力学表达,确定车体结构的边界约束条件.仿真计算各种载荷作用下车体结构的变形和应力分布状况,指出车体结构强度和刚度的薄弱部位,分析导致计算的最大应力超过材料屈服强度的原因,提出并仿真验证车体主要承载部件的设计改进方案.