System and method for on-line training of a non-linear model for use in electronic commerce

Abstract

A system and method for on-line training of a non-linear model for use in electronic commerce. The non-linear model is trained with training sets from a stream of process data. The system detects availability of new training data, and constructs a training set from the corresponding input data. Over time, many training sets are presented to the non-linear model. When multiple presentations are needed to effectively train the non-linear model, a buffer of training sets is filled and updated as new training data becomes available. Once the buffer is full, a new training set bumps the oldest training set from the buffer. The training sets are presented one or more times each time a new training set is constructed. An historical database may be used to construct training sets for the non-linear model. The non-linear model may be trained retrospectively by searching the historical database and constructing training sets.

Description

CONTINUATION DATA[0001] This application is a Continuation-in-Part of U.S. utility application Ser. No. 09 / 946,809 titled "SYSTEM AND METHOD FOR ON-LINE TRAIING OF A SUPPORT VECTOR MACHINE" filed Sep. 5, 2001, whose inventors are Eric Hartman, Bruce Ferguson, Doug Johnson, and Eric Hurley.[0002] 1. Field of the Invention[0003] The present invention relates generally to the field of non-linear models. More particularly, the present invention relates to an electronic commerce system for on-line training of a non-linear model.[0004] 2. Description of the Related Art[0005] Many predictive systems may be characterized by the use of an internal model which represents a process or system for which predictions are made. Predictive model types may be linear, non-linear, stochastic, or analytical, among others. However, for complex phenomena non-linear models may generally be preferred due to their ability to capture non-linear dependencies among various attributes of the phenomena. Examples ...

AI Technical Summary

Problems solved by technology

The resulting error is often used to adjust weights or coefficients in the model until the model generates the correct output (within some error margin) for each set of training input data.

Such measurements may sometimes be very difficult, if not impossible, to effectively perform in certain situations.

Typically, the measurement of such output properties 1904 is difficult and / or time consuming and / or expensive.

However, such measurements may be unreliable.

Furthermore, such measurements may also be slow.

But oftentimes process conditions 1906 make such easy measurements much more difficult to achieve.

For example, it may be difficult to determine the level of a foaming liquid in a vessel.

Moreover, a corrosive process may destroy measurement sensors, such as those used to measure pressure.

As stated above, the direct measurement of the process conditions 1906 and / or the output properties 1904 is often difficult, if not impossible, to do effectively.

Such conventional computer models, as explained below, have limitations.

Conventional computer findamental models have significant limitations, such as: (1) They may be difficult to create since the process 1212 may be described at the level of scientific understanding, which is usually very detailed; (2) Not all processes 1212 are understood in basic engineering and scientific principles in a way that may be computer modeled; (3) Some output properties 1904 may not be adequately described by the results of the computer fundamental models; and (4) The number of skilled computer model builders is limited, and the cost associated with building such models is thus quite high.

These problems result in computer fundamental models being practical only in some cases where measurement is difficult or impossible to achieve.

This is very difficult to measure directly, and takes considerable time to perform.

However, there may be significant problems associated with computer statistical models, which include the following: (1) Computer statistical models require a good design of the model relationships (i.e., the equations) or the predictions will be poor; (2) Statistical methods used to adjust the constants typically may be difficult to use; (3) Good adjustment of the constants may not always be achieved in such statistical models; and (4) As is the case with fundamental models, the number of skilled statistical model builders is limited, and thus the cost of creating and maintaining such statistical models is high.

Some of these deficiencies are as follows: (1) Output properties 1904 may often be difficult to measure; (2) Process conditions 1906 may often be difficult to measure; (3) Determining the initial value or settings of the process conditions 1906 when making a new output 1216 is often difficult; and (4) Conventional computer models work only in a small percentage of cases when used as substitutes for measurements.

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