关于膜蛋白侧向限制扩散的讨论

讨论了膜骨架栅栏模型和系链模型解释膜蛋白侧向限制扩散时的困难。在蛋白质一维约束扩散实验现象的基础上，提出了膜蛋白的两维约束扩散模型，并用这个模型讨论了膜蛋白的多种运动模式。

PHC 桩的冲击应力及利用侧向限制改善桩的抗冲击性能

ＰＨＣ桩施打过程中，常出现打烂、裂、断桩等现象，本文通过现场实测施打冲击应力及ＰＨＣ桩的结构、构造情况，分析产生质量事故的原因，以及寻求解决问题的几种方法。

侧向限制法软土处理技术研究

结合工程实际,经分析和探索,采用了一种新的深层软土地基处理方法——侧向限制法软土处理技术,取得了较好效果。本文主要介绍侧向限制法软土处理技术的应用、施工及施工工艺、施工注意事项、观测结果等实施情况,以及在其他类似工程的应用结果。

3D stability analysis method of concave slope based on the Bishop method

In order to study the stability control mechanism of a concave slope with circular landslide, and remove the influence of differences in shape on slope stability, the limit analysis method of a simplified Bishop method was employed. The sliding body was divided into strips in a three-dimensional model, and the lateral earth pressure was put into mechanical analysis and the three-dimensional stability analysis methods applicable for circular sliding in concave slope were deduced. Based on geometric structure and the geological parameters of a concave slope, the influence rule of curvature radius and the top and bottom arch height on the concave slope stability were analyzed. The results show that the stability coefficient decreases after growth, first in the transition stage of slope shape from flat to concave, and it has been confirmed that there is a best size to make the slope stability factor reach a maximum. By contrast with average slope, the stability of a concave slope features a smaller range of ascension with slope height increase, which indicates that the enhancing effect of a concave slope is apparent only with lower slope heights.

大功率半导体激光器性能改善的研究

电流的侧向限制对半导体激光器具有重要意义,在半导体激光器有源区加入侧向限制结构一方面可以实现侧向限制,另一方面可以在一定范围内降低阈值电流密度。但是常规的侧向限制方法无论是侧向波导结构还是浅隔离槽结构都无法高效地抑制电流的侧向扩展。设计了新型的深隔离槽结构,利用Comsol软件仿真模拟侧向限制,发现深度超过外延层厚度的深隔离槽结构能更有效地提高电流的注入效率。在工艺中利用感应耦合等离子体刻蚀在距离脊型台两侧100μm的位置刻蚀深度为4μm的深隔离槽。实验结果表明,工作电流为5A时,腔长4mm具有深隔离槽结构的半导体激光器芯片输出功率为3.6 W,阈值电流为0.3 A,阈值电流密度为78.95A/cm2。结果表明新型深隔离槽结构可以有效抑制电流的侧向扩展。