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Model parameter adjustment method and device

A technology of model parameters and adjustment methods, which is applied in data processing applications, computing, resources, etc., and can solve problems such as adaptive adjustment of model parameters.

Inactive Publication Date: 2016-10-05
ALIBABA GRP HLDG LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0011] The present application provides a method and device for adjusting model parameters, which can solve the problem in the prior art that the adaptive adjustment of model parameters cannot be performed quickly, accurately and flexibly on the basis of low cost

Method used

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  • Model parameter adjustment method and device
  • Model parameter adjustment method and device

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Embodiment Construction

[0065] As mentioned in the background technology, the model reconstruction proposed by Method 1 is a relatively common existing processing method, which can solve the problem of model performance degradation. However, in mature industries, such as CRM (Customer Relationship Management, customer Relationship management) system and commercial bank decision-making system, the process of rebuilding the model requires a lot of resources and takes a long time; in addition, it takes a certain amount of time from the rebuilding to the redeployment of the model, resulting in a certain lag in model updating. Especially in the field of risk control, due to the rapid changes in user behavior characteristics, the model needs to be able to adjust the response quickly and efficiently, and the method of model reconstruction obviously cannot meet this requirement. The other approach proposed in Method 2 is to remodel only the original model scores and readjust the original model scores. This ap...

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Abstract

The invention discloses a model parameter adjustment method and a device. Through applying a technical scheme disclosed by the embodiment of the invention, a risk control decision-making device monitors the performance of a current model, the risk control decision-making device takes model parameters of the current model when the performance reaches an adjustment threshold and acquires preprocessed training data in recent training period, and the risk control decision-making device carries out adjustment on the model parameters of the current model according to the training data and updates the current model according to the adjusted model parameters, so that the risk control decision-making device is enabled to adjust and update the model automatically without changing the model structure and variable on the basis of monitoring for the model performance, the accuracy of the model applied at present is increased, and thus model improvement and optimization are realized with a low cost.

Description

technical field [0001] The present application relates to the field of system testing, in particular to a method and device for adjusting model parameters. Background technique [0002] The risk model is an important part of the risk control system, and the risk model is often used directly to judge whether the user's environment or the user's transaction is risky. For example, whether there is a risk of theft of accounts involving personal assets or information security such as online banking, whether each fund transaction in online banking is operated by the account owner himself, and so on. The risk model is trained based on historical information. As time goes by, samples will change and migrate, resulting in a decline in the accuracy of the model. [0003] One of the manifestations of decreased accuracy is that the point estimate is too high or too low. Point estimation is also called fixed value estimation. A high point estimate means that the model overestimates the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06
Inventor 陈露佳
Owner ALIBABA GRP HLDG LTD
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