A Photonic Bandgap Filter Using Metallic Hilbert Curves

We theoretically suggest that a metallic plate with Hilbert curves can possesses multiple resonances in a linear scale, leading to multiple stop bands and pass bands for electromagnetic waves over a wide frequency range.The forward transmission from a line source nearby a small plate covered by four cells with Hilbert curves is checked by a probe at the far field, the results agree well with the multiple resonance frequencies calculated by the plane wave incidence under a periodic boundary condition, the return loss spectra show that radiations of a line antenna working at 4.5 GHz can be greatly enhanced, which results from the interaction of the antenna and the subwavelength metallic plate. This kind of metallic pattern is very practical in multi-frequency functioned wave devices with sub-wavelength sizes.     

对高职“技能型”教学的探讨

职业教育的根本任务是传授专业技能,注重＂技能型＂教学是高职培养目标的需要,加强＂技能型＂教学必须通过构造全新的教学体系来实现,在高职教育中,教师的素质是决定教学质量及办学特色的关键因素,是实现＂技能型＂教学的根本。     

浅议中非地区混凝土小型空心砌块墙体裂缝防治

本文在简要总结分析国内外砌体裂缝的性质和裂缝控制措施的基础上，结合非洲中部尤其是大西洋沿海一带地区状况，针对性地提出了混凝土砌体结构裂缝控制的解决办法。     

以铁路春运暑运为平台做实轨道交通运营管理专业顶岗实习

近年来,轨道交通飞速发展,企业对运营管理专业人才的需求不断上升,为了保证运营管理专业学生社会实践的有序进行和培养该专业学生必备的职业素养,惟有找到一个＂真实的工作环境＂,顶岗实习才能收到预期的效果,本文根据多年来学生参加铁路春运暑运的实践情况,针对顶岗实习一事谈些个人的看法。     

浅议中非地区混凝土型空心砌块墙体裂缝防治

本文在简要总结分析国内外砌体裂缝的性质和裂缝控制措施的基础上,结合非洲中部尤其是大西洋沿海一带地区状况,针对性地提出了混凝土砌体结构裂缝控制的解决办法.