Chi-Chang Chang

Prof. Dr. Chi-Chang Chang

Chung-Shan Medical University
orcid

Research Focus & Metrics

Academic Career Length

23Years (2004-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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14 February 2013 in Neural Computing and Applications
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CTChih-Jen Tseng
Chih-Jen Tseng
Chi-Jie LuChi-Jie Lu
Chi-Jie Lu
Chi-Chang ChangChi-Chang Chang
Chi-Chang Chang
GCGin-Den Chen
Gin-Den Chen

29 November 2018 in Molecules
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LXLei Xu
Lei Xu
GLGuangmin Liang
Guangmin Liang
Changrui LiaoChangrui Liao
Changrui Liao
GCGin-Den Chen
Gin-Den Chen
Chi-Chang ChangChi-Chang Chang
Chi-Chang Chang
Alzheimer’s disease (AD) is considered to one of 10 key diseases leading to death in humans. AD is considered the main cause of brain degeneration, and will lead to dementia. It is beneficial for affected patients to be diagnosed with the disease at an early stage so that efforts to manage the patient can begin as soon as possible. Most existing protocols diagnose AD by way of magnetic resonance imaging (MRI). However, because the size of the images produced is large, existing techniques that employ MRI technology are expensive and time-consuming to perform. With this in mind, in the current study, AD is predicted instead by the use of a support vector machine (SVM) method based on gene-coding protein sequence information. In our proposed method, the frequency of two consecutive amino acids is used to describe the sequence information. The accuracy of the proposed method for identifying AD is 85.7%, which is demonstrated by the obtained experimental results. The experimental results also show that the sequence information of gene-coding proteins can be used to predict AD.

1 May 2017 in Artificial Intelligence in Medicine
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Journal Article
Closed access
CTChih-Jen Tseng
Chih-Jen Tseng
Chi-Jie LuChi-Jie Lu
Chi-Jie Lu
Chi-Chang ChangChi-Chang Chang
Chi-Chang Chang
GCGin-Den Chen
Gin-Den Chen
Chalong CheewakriangkraiChalong Cheewakriangkrai
Chalong Cheewakriangkrai

12 February 2019 in Frontiers in Genetics
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LXLei Xu
Lei Xu
GLGuangmin Liang
Guangmin Liang
CLChangrui Liao
Changrui Liao
GCGin-Den Chen
Gin-Den Chen
Chi-Chang ChangChi-Chang Chang
Chi-Chang Chang
In this paper, a computational method based on machine learning technique for identifying Alzheimer's disease genes is proposed. Compared with most existing machine learning based methods, existing methods predict Alzheimer's disease genes by using structural magnetic resonance imaging (MRI) technique. Most methods have attained acceptable results, but the cost is expensive and time consuming. Thus, we proposed a computational method for identifying Alzheimer disease genes by use of the sequence information of proteins, and classify the feature vectors by random forest. In the proposed method, the gene protein information is extracted by adaptive k-skip-n-gram features. The proposed method can attain the accuracy to 85.5% on the selected UniProt dataset, which has been demonstrated by the experimental results.

CSChin-Chuan Shih
Chin-Chuan Shih
Chi-Jie LuChi-Jie Lu
Chi-Jie Lu
GCGin-Den Chen
Gin-Den Chen
Chi-Chang ChangChi-Chang Chang
Chi-Chang Chang
Developing effective risk prediction models is a cost-effective approach to predicting complications of chronic kidney disease (CKD) and mortality rates; however, there is inadequate evidence to support screening for CKD. In this study, four data mining algorithms, including a classification and regression tree, a C4.5 decision tree, a linear discriminant analysis, and an extreme learning machine, are used to predict early CKD. The study includes datasets from 19,270 patients, provided by an adult health examination program from 32 chain clinics and three special physical examination centers, between 2015 and 2019. There were 11 independent variables, and the glomerular filtration rate (GFR) was used as the predictive variable. The C4.5 decision tree algorithm outperformed the three comparison models for predicting early CKD based on accuracy, sensitivity, specificity, and area under the curve metrics. It is, therefore, a promising method for early CKD prediction. The experimental results showed that Urine protein and creatinine ratio (UPCR), Proteinuria (PRO), Red blood cells (RBC), Glucose Fasting (GLU), Triglycerides (TG), Total Cholesterol (T-CHO), age, and gender are important risk factors. CKD care is closely related to primary care level and is recognized as a healthcare priority in national strategy. The proposed risk prediction models can support the important influence of personality and health examination representations in predicting early CKD.

18 September 2019 in Frontiers in Genetics
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Chi-Chang ChangChi-Chang Chang
Chi-Chang Chang
Ssu-Han ChenSsu-Han Chen
Ssu-Han Chen
Due to the high effectiveness of cancer screening and therapies, the diagnosis of second primary cancers (SPCs) has increased in women with breast cancer. The present study was conducted to develop a novel machine learning–based classification scheme for predicting the risk factors of SPCs in breast cancer survivors. The proposed scheme was based on the XGBoost classifier with the following four comparable strategies: transformation, resampling, clustering, and ensemble learning, to improve the training balanced accuracy. Results suggested that the best prediction accuracy for an empirical case is the XGBoost associated with the strategies of resampling and clustering. The experimental results showed that age, sequence of radiotherapy and surgery, surgical margins of the primary site, human epidermal growth factor, high-dose clinical target volume, and estrogen receptors are relatively more important risk factors associated with SPCs in patients with breast cancer. These risk factors should be monitored for the early detection of breast cancer. In conclusion, the proposed scheme can support the important influence of personality and clinical symptom representations in all phases of the primary treatment trajectory. Our results further suggested that adaptive machine learning techniques require the incorporation of significant variables for optimal predictions.