物理实验
物理實驗
물리실험
PHYSICS EXPERIMENTATION
2015年
5期
1-6
,共6页
悬滴法%轮廓拟合%表面张力
懸滴法%輪廓擬閤%錶麵張力
현적법%륜곽의합%표면장력
pendent drop method%full-profile fitting%surface tension
研制了悬滴法表面张力实验系统，温度测量范围为283．15～323．15 K ，温度测量误差不超过±0．5 K ．采用轮廓拟合法对表面张力进行计算，在VC＋＋环境下分别用坐标轮换法和Nelder‐Mead单纯形法进行了编程实现．利用正庚烷和乙醇对实验系统进行校验，结果表明：2种物质的表面张力实验值与文献值偏差在±0．2mN·m －1以内，坐标轮换法和Nelder‐Mead单纯形法的计算结果一致．
研製瞭懸滴法錶麵張力實驗繫統，溫度測量範圍為283．15～323．15 K ，溫度測量誤差不超過±0．5 K ．採用輪廓擬閤法對錶麵張力進行計算，在VC＋＋環境下分彆用坐標輪換法和Nelder‐Mead單純形法進行瞭編程實現．利用正庚烷和乙醇對實驗繫統進行校驗，結果錶明：2種物質的錶麵張力實驗值與文獻值偏差在±0．2mN·m －1以內，坐標輪換法和Nelder‐Mead單純形法的計算結果一緻．
연제료현적법표면장력실험계통，온도측량범위위283．15～323．15 K ，온도측량오차불초과±0．5 K ．채용륜곽의합법대표면장력진행계산，재VC＋＋배경하분별용좌표륜환법화Nelder‐Mead단순형법진행료편정실현．이용정경완화을순대실험계통진행교험，결과표명：2충물질적표면장력실험치여문헌치편차재±0．2mN·m －1이내，좌표륜환법화Nelder‐Mead단순형법적계산결과일치．
A surface tension experiment system using full‐profile fitting pendent drop method was built .The system could work at temperatures ranging from 283 .15 to 323 .15 K and its uncertainty of temperature measurement was better than ± 0 .5 K .The full‐profile fitting was implemented with co‐ordinate alternation method and Nelder‐Mead simplex method with VC+ + .The surface tensions of n‐heptane and ethanol were measured with this system .The deviations between experimental data and literature data were less than 0 .2 mN · m -1 ,which proved the reliability and stability of the system . Besides ,the analysis of experimental data suggested that both coordinate alternation method and Nelder‐Mead simplex method had good convergence and the latter was more computationally efficient .
