Source identification and apportiontment of PAHs was processed by both ratio method and CMB receptor model for the inhalable particulates (PM_(10((.

This paper analyzes the cause of poor shows basing on the oil-bearing characteristics of Indonesia block and the time delay property of operation, illustrates the theory of identifying this type of reservoirs using hydrocarbon ratio method, and proposes ratio method and profile.

Taking into account the efficiency of the rough set in incomplete information processing, the intuitiveness of querying and matching by case-based reasoning and the convenience of the ratio method, an approach based on multi-artificial intelligence methods for diagnosing transformer faults is proposed.

Application of difference ratio of equivalent elastic modulus in identifying low resistivity hydrocarbon layers;

This new diagnosis method expand coding bound of original IEC three-ratio.

This paper deals with using DGA for fault diagnosis of transformer devices, introduces the basic theories of characteristic gas method, three-ratio method and Duval s triangle method, and further points out the indispersability of building DGA data base through practical examples.

Based on analyzing oil chromatogram data,using the ultrasonic method to test the position of partial discharge ,the electrification monitoring technology and three-ratio method,the fault reason of a light gas pressure protection actuation on the main transformer are analyzed.

Fuzzy C-means clustering(FCM) algorithm,BP neural network,rough set theory diagnosis algorithm and IEC 60599 recommended three-ratio method are adopted as monomial methods to diagnose fault independently in the new diagnosis model.