半导体激光对金葡菌耐药性能的影响

葡萄菌由于接触广谱抗菌素的结果,耐药性能愈益严重。金葡菌的耐药性能尤为突出,其所引致的各种感染成为临床治疗难题。我们应用半导体激光照射金葡菌,了解其对金葡菌耐药性能的影响,拟为治疗炎症提供依据。     

广义函数D－赋值意义下的多目标规划模型

提出一种具有应用前景的广义函数多目标规划模型。着重讨论了广义函数的Ｄ－赋值意义下的广义函数多目标规划模型并具体构造出一个双目标可计算的广义函数多目标模型，从而给出了较为完整充实的广义函数多目标规划模型。     

Interface conjunction factors of the second phase particles in alloys and their effects

The second phase in multi-phase alloys has connection with many important phenomena such as aging strengthening, dispersion strengthening, secondary hardening, crystal refinement. In this paper, the interface conjunction factors of the interface between MC(M = V, Nb, Ti) and austenite and martensite are calculate out. The relationship between these factors and the characteristics are analyzed . The reason for the second phases being fine and dispersing and their strengthening and toughening effect on the alloy is explained using the relationship. Based on the relationship, the valence electron structure of the interface between the second phase particles and the matrix can be optimized by changing the alloying elements, which make it possible to design the composition of alloys from the valence electron structure of the second phase particles.     

带有相变的三维温度场数值模拟

以激光熔凝表面强韧化处理为背景 ,应用空间的弹塑性有限单元和高精度的数值算法、同时考虑材料组织性能的变化来模拟材料的温度场。主要研究激光熔凝加工中瞬时温度场数值模拟 ,同时考虑相变潜热的影响 ,为第二步热应力场及残余应力的数值模拟做准备。最后用算例验证了模型的正确性 ,并给出了不同时刻温度场的分布。