The reversible adsorption and desorption of water molecules in the porous films depend on water vapor, which would shift the reflected minimum wavelength of the F-P filter.
与湿度相关的多层膜堆可逆的水分吸附和解吸附将引起最小反射波长的漂移，这样多层膜的中心波长的变化就和湿度产生了有机的关联。
Methods Crosssectional seroepidemiologic survey was conducted through IFAT in Anopheles sinensis area and A. anthropophagus plus A. sinensis area respectively in 2006 and 2007. The blood-filter papers collected from residents were tested by IFAT to calculate malaria antibody positive rate and positive GMRT in different age groups. The predictive infection probability was evaluated by reversible catalytic model based on antibody positive rate in the group of less than 20 year-old and compared to the annual parasite incidence.
2006和2007年选择沿黄淮流域单一中华按蚊为媒介的安徽省宿州、怀远和砀山县、河南省永城县，嗜人按蚊与中华按蚊复合媒介地区的河南省桐柏县和湖北省广水县，每县分别选择2个自然村，采用重复横向调查方法，连续两年于疟疾流行季节末期对调查点居民（≥1.5岁）采制滤纸干血滴，用IFAT检测人群疟疾抗体水平，计算人群疟疾抗体阳性率与阳性几何平均滴度倒数；分别以20岁以下年龄组的抗体阳性率通过可逆催化模型估算这些地区的疟疾感染概率，并与当年疟疾发病率进行比较。
The principle is based on the reversibility of a photochemical reaction accompanied by a change of coloration. colour reversible electrochemical filter
其原理是根据光化反应的可逆性伴随的染色变化。彩色可逆电化学滤光器