Such variations are found that due to applied magnetic field from the substrate . the aspect and brightness of the glow and the self-bias voltage for the target changes significantly . further measurements for the deposited films indicate that the appearance and the deposition rate of the films also vary 一方面,国债的发行促进了我国经济的发展,为经济建设做出了巨大贡献,这方面国债所起的作用是积极的;另方面,国债规模的迅速增加,使政府还本付息的压力越来越大,国债投资对私人投资的“挤出效用”越来越明显。