Journal of Jilin University(Engineering and Technology Edition) ›› 2022, Vol. 52 ›› Issue (3): 633-639.doi: 10.13229/j.cnki.jdxbgxb20200871

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Validity classification of melting curve based on multi⁃scale fusion convolutional neural network

Xiang-jun LI1,2(),Jie-ying TU1,Zhi-bin ZHAO1()   

  1. 1.College of Software,Nanchang University,Nanchang 330047,China
    2.Department of Computer Science and Technology,Nanchang University,Nanchang 330031,China
  • Received:2020-11-11 Online:2022-03-01 Published:2022-03-08
  • Contact: Zhi-bin ZHAO E-mail:lxjun_alex@163.com;zhaozhibin@ncu.edu.cn

Abstract:

Aiming at the issue of peak classification in melting curve images, a convolutional neural network (CNN) classification model based on multi-scale fusion is proposed. First, the multi-scale context information obtained through dilated convolution is integrated with the feature information extracted from the residual module, which makes up for the shortcoming of the deep network that loses the global information. Then, different from traditional convolution with constant convolution kernel, a dynamic filter that changes with the input is used to make the network learning more accurate. In addition, in order to train the model, a dataset of melting curves is created, which includes a balanced dataset and an unbalanced dataset. This paper uses six classification-based evaluation indicators to compare with six classification methods based on deep learning. Experimental results show that the proposed method is significantly better than other methods in objective evaluation indicators.

Key words: image classification, convolutional neural networks, multi-scale fusion, melting curve, dynamic filter

CLC Number: 

  • TP391

Fig.1

Improved residual network structure"

Fig.2

Whole instruction of network"

Table 1

Experimental results of determining thenumber of dilated convolutional layers"

方法AccuracySpecificitySensitivity
ResNet-10.92310.86330.9425
ResNet-20.92530.86410.9434
ResNet-30.92720.86480.9421
ResNet-1_20.92920.87090.9503
ResNet-1_30.93010.87340.9527
ResNet-1_2_30.93250.87210.9532

Table 2

Experimental results of different layers of ResNet"

方法AccuracySpecificitySensitivity
ResNet-180.93250.87210.9532
ResNet-340.94050.87930.9576
ResNet-500.94180.88370.9583
ResNet-1010.94210.88430.9590
ResNet-1520.94250.88480.9595

Table 3

Experimental results on the balance dataset"

方法AccuracyPrecisionSpecificitySensitivityF1MCC
VGG0.90710.93650.84640.93210.93430.7758
SqueezeNet0.91420.93240.84590.94450.93840.7970
GoogLeNet0.91790.95280.87760.93320.94290.7978
MnasNet0.90750.94950.87200.92110.93500.7754
DenseNet0.91010.94570.86190.92860.93710.7797
MobileNetV30.91200.92210.83710.94880.93520.7986
本文0.94250.96230.88480.95950.96190.8454

Fig.3

Experimental results of different data sets"

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