Electronic nose (FOX) recording of 20 chemicals

the data was produced to investigate the feature selection problem for the application of all-against-all classification of a set of 20 chemicals using two types of sensors, classical doped tin\noxide and zeolite-coated chromium titanium oxide sensors.\nLineage: The measurements were performed with a FOX 3000 Enose\n(Alpha M.O.S., Toulouse, France). Originally, the instrument was\nequipped with a modified array of 12 semiconducting sensors comprising an array of six standard, doped tin dioxide (SnO2) and six\nchromium titanium oxide (CTO) and tungsten oxide (WO3) sensors.\nWe removed the CTO and WO3 sensors and replaced them\nwith an array of six novel CTO based sensors, five of these being\nzeolite-coated and one an uncoated CTO sensor. \nDue to the physical characteristics of the sensors, the two arrays\nwere housed in different chambers. The set of chemical compounds\nanalysed consisted of five chemicals each from four chemical\ngroups: alcohols, aldehydes, esters and ketones.

本数据集旨在研究使用两类传感器对20种化学品开展全对全分类任务时的特征选择问题，所用传感器分别为经典掺杂二氧化锡（tin dioxide, SnO₂）与沸石涂层铬钛氧化物（chromium titanium oxide, CTO）传感器。
数据集溯源：本次测量采用FOX 3000 Enose电子鼻（法国图卢兹Alpha M.O.S.公司生产）完成。该仪器原始配置为12只半导体传感器组成的改装阵列，包含6只标准掺杂氧化锡（SnO₂）传感器，以及6只铬钛氧化物（CTO）与氧化钨（WO₃）传感器。研究人员移除了原有的CTO与WO₃传感器，替换为6只基于CTO的新型传感器阵列，其中5只为沸石涂层型，1只为未涂层CTO传感器。
受传感器物理特性限制，两套传感器阵列被分别安置于不同的测试腔体内。本次分析的化学品共涵盖4类化学基团，每类基团包含5种化合物，分别为醇类、醛类、酯类与酮类。