STUDY OF PERIPAPILLRY NERVE FIBER LAYER MEASUREMENT BY SCANNING LASER POLARIMETRY BETWEEN EYES OF GLAUCOMA SUSPECTS AND THOSE WITH GLAUCOMATOUS VISUAL FIELD DEFECT

Interpretation of quantitative results of nerve fiber layer (NFL) thickness based on scanning laser polarimetry (GDx-NFA) can be quite challenging especially in glaucoma suspects. Purpose: Authors studied NFL parameters obtained from GDx-NFA in glaucoma suspects and compared them with those of patients with glaucoma Methods: Eighty six glaucoma suspects based

COMPARISON OF THE FREQUENCY DOU-BLING PERIMETRY SCREENING ALGO-RITHM AND PERIPAPILLARY NERVE FIBER LAYER THICKNESS PARAMETERS AS MEASURED BY SCANNING LASER PO- LARIMETRY IN PATIENTS WITH HIGLY SUSPECTED GLAUCOMA

Frequency doubling perimetry (FDP) may idendtify glaucoma at a relatively early stage even before conventional perimetry does. Scanning laser polarimetry (GDx) has shown to differentiate nerve fiber layer thickness (NFLT) between glaucomatous

多孔介质水合物天然气开采分析模拟

由于在冻土层和海洋环境中存在着大量的天然气水合物，因此天然气水合物将成为未来的替代能源。但是，至今尚未对各种开采方法中来自水合物的天然气开采潜力进行充分调查研究。本项研究介绍了一个简单的分析模型，该模型通过减压方法从多孔介质中分解水合物，从而模拟天然气开采。我们认为分解带的热传递、水合物分解内动力学和气水两相流动是涉及多孔介质中水合物分解的三种主要机理。本项研究对涉及物理性质实际变化范围的三种机理的相对重要性进行了比较。实例研究表明，气水两相流动的影响比热传递和水合物分解内动力学的影响小得多。考虑到速度控制作用，开发出的分析模型可以预测在多孔介质中天然气水合物分解的动态特征。模型已用于进行敏感性研究，已便调查在水合物储层进行商业性天然气开采的可行性。研究结果表明，从天然气水合物储层中能够采出大量天然气，水合物叠加在含气带上方。在西伯利亚、阿拉斯加和加拿大的永久冻土区中已发现了这种天然气水合物储层。