Development of an optical probe to measure the flattened area of ocular cornea

The optical probe in tonometers is a key component in measuring the flattened diameter or area of the ocular cornea. A new kind of optical probe for the direct measurement of the flattened area of the ocular cornea is presented. The optical probe uses the cone prism with a modulating flake of light intensity as its measuring body. The test results on simulated eyeballs with different radii of curvature of the ocular cornea show that there is a linear relation between the flattened area of the ocular cornea and the normalized current. The optical probe, which is more compact compared with existing optical probes and easily configured with its coaxiality of optical parts, may be an excellent probe for constructing a low-cost, miniaturized applanation tonometer.     

含盐乙腈水溶液的T-P-X关系

本文采用CPⅡ型沸点仪测定了富水端乙腈-水-(KCl,CaCl₂,KI)体系在26.66～93.33kPa压力下及盐质量摩尔浓度从0.1～0.7mol·kg^-1范围内的T-P-X关系.由热力学基本原理导出含盐二元系Clausius-Clapeyron方程类型的具体形式.该方程在特定条件下可退化为各种类型的现有方程,实验结果验证了理论推导的正确性.     

计算多环苯型芳烃共振能的新方法—苯环计数(BRC)法

本文提出一个计算多环苯型烃共振能的新方法:简称BRC法。应用BRC法计算了48个稠环芳烃的的共振能。REBRC与SRT、HS—HMO、A—Ⅱ、SCF—MO等法计算的共振能之间都有良好的线性关系,相关系数分别为0.9961,0.9955,0.9940,0.9874。良好的线性关系也存在于REPEERC与UV吸收中的P带能