利用光致发光光谱（Photoluminescence。简称PL）、光扫描系统（PLMapping）、原子力显微镜（Atomic Force Microscope，简称AFM）等测试手段，研究碱性（Nil4）2s对n型GaSbSE4L表面的影响，发现与未处理的GaSb表面相比，其光学性质明...利用光致发光光谱（Photoluminescence。简称PL）、光扫描系统（PLMapping）、原子力显微镜（Atomic Force Microscope，简称AFM）等测试手段，研究碱性（Nil4）2s对n型GaSbSE4L表面的影响，发现与未处理的GaSb表面相比，其光学性质明显提高。当硫化时间为180s时，光学强度提高了10倍左右，发光均匀性和表面平整度也达到了最优。同时，分析了钝化效果的时效性，发现当钝化后的样品放置于空气中48h时，钝化效果基本消失。展开更多
There are few papers in the literature focusing on the issue of the optimal depletion of exhaustible resources in the framework of variable time preference. This paper attempts to analyze the pure consumption of exhau...There are few papers in the literature focusing on the issue of the optimal depletion of exhaustible resources in the framework of variable time preference. This paper attempts to analyze the pure consumption of exhaustible resource under hy- perbolic time preference, and to discuss the optimal depletion rate and the effect of the protection of the exhaustible resource under different commitment abilities. The results of model show that the case of the hyperbolic discount with the full commitment of the govemment is equivalent to the case of constant discount of the social planner problem. In that case, the optimal depletion rate and the initial consumption of exhaustible resource are the slowest. On the contrary, they are the highest and the myopic behaviors lead to excessive consumption of exhaustible resources inevitably without commitment. Otherwise, in the case of partial commit- ment, the results are between the cases of full commitment and of no commitment. Therefore, with the hyperbolic time preference, the optimal depletion rate of resource depends on the commitment ability. Higher commitment ability leads to lower effective rate of time preference, and consequently, lower depletion rate and lower initial depletion value. The improvement of commitment ability can decrease the impatience and myopia behaviors, and contribute to the protection of the exhaustible resources.展开更多
文摘利用光致发光光谱（Photoluminescence。简称PL）、光扫描系统（PLMapping）、原子力显微镜（Atomic Force Microscope，简称AFM）等测试手段，研究碱性（Nil4）2s对n型GaSbSE4L表面的影响，发现与未处理的GaSb表面相比，其光学性质明显提高。当硫化时间为180s时，光学强度提高了10倍左右，发光均匀性和表面平整度也达到了最优。同时，分析了钝化效果的时效性，发现当钝化后的样品放置于空气中48h时，钝化效果基本消失。
基金Funding of Humanities and Social Science Fundation of Education Ministry (Grant No.11YJC790308)
文摘There are few papers in the literature focusing on the issue of the optimal depletion of exhaustible resources in the framework of variable time preference. This paper attempts to analyze the pure consumption of exhaustible resource under hy- perbolic time preference, and to discuss the optimal depletion rate and the effect of the protection of the exhaustible resource under different commitment abilities. The results of model show that the case of the hyperbolic discount with the full commitment of the govemment is equivalent to the case of constant discount of the social planner problem. In that case, the optimal depletion rate and the initial consumption of exhaustible resource are the slowest. On the contrary, they are the highest and the myopic behaviors lead to excessive consumption of exhaustible resources inevitably without commitment. Otherwise, in the case of partial commit- ment, the results are between the cases of full commitment and of no commitment. Therefore, with the hyperbolic time preference, the optimal depletion rate of resource depends on the commitment ability. Higher commitment ability leads to lower effective rate of time preference, and consequently, lower depletion rate and lower initial depletion value. The improvement of commitment ability can decrease the impatience and myopia behaviors, and contribute to the protection of the exhaustible resources.
