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现有的教育评估研究主要着眼于从院校整体水平上进行评估,对学校内部二级学院办学效益的研究较少.着眼于二级学院的现实状况、运行效率等客观情况,从资源投入、产出相配比的角度,研究二级学院办学经济效益、社会效益,进而提出解决方案,具有理论与实践价值. 相似文献
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In this paper, a novel approach for highly efficient purification of cadmium by vacuum distillation was reported. During the
cadmium vacuum distillation, a small quantity of cadmium oxide film, produced under lower vacuum, was intentionally induced into the
evaporator, and the presence of cadmium oxide changed the behavior of impurities. Meantime, a thermodynamic model of the process, which
described the phase composition in the evaporator and condenser during evaporation of cadmium, was established. The model was used to
classify the impurities according to their behavior in the purification process. On the base of the model, the purification of cadmium by
one-stage and two-stage distillation and the validity of the model were also discussed. 相似文献
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Micro-indention and finite element method (FEM) are used to study the stress at the interface between diamond-like carbon
(DLC) film and mercury cadmium telluride (MCT) substrate, with different coating thickness, deposition temperature and indention load.
The FEM simulation results show that when Young＇s modulus ratio of the coating to the substrate Ec/Es相似文献
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In的掺杂对化学水浴沉积SnS薄膜电阻率的影响 总被引：1，自引：0，他引：1
SnS and SnS：In films were deposited onto glass substrates by chemical bath technique. The structure and surface morphology of the SnS：In films were studied by X-ray diffraction （XRD） and scanning electron microscope （SEM） respectively. Energy dispersive spectroscopy （EDS） showed the existence of In in the films. The undoped SnS film exhibited a rather high resistivity and InCl3 could reduce the resistivity of these films by two orders approximately. The band gaps of the SnS and SnS：In films were evaluated from the optical transmission spectra. 相似文献
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