Journal article in 2012 and before
            
                A combination method of improved impulse rejection filter and template matching for identification of anomalous intervals in electrocardiographic RR sequences
            
        
        
            Chengyu Liu*, Liping Li, Lina Zhao, Dingchang Zheng, Peng Li & Changchun Liu*
        
        
            Journal of Medical and Biological Engineering, 2012, 32(4): 245-250.
        
        
            
        
            
                Comparison of different threshold values r for approximate entropy: Application to investigate the heart rate variability between heart failure and healthy control groups
            
        
        
            Chengyu Liu, Changchun Liu*, Peng Shao, Liping Li, Xin Sun, Xinpei Wang & Feng Liu
        
        
            Physiological Measurement, 2011, 32(2): 167-180.
        
        
            
        
            
                Five-class density histogram and its application in short-term heart rate variability
            
        
        
            Liping Li, Ke Li, Shanguang Cheng, Chengyu Liu & Changchun Liu*
        
        
            Journal of Medical and Biological Engineering, 2012, 32(4): 287-291.
        
        
            
        
            
                Dynamic nodes partition algorithm for Ad Hoc network
            
        
        
            Chengyu Liu*, Lina Zhao, Changchun Liu & Shoushui Wei
        
        
            China Communications, 2011, 8(8): 44-48.
        
        
            
        
            
                A new method in short-term heart rate variability---five-class density histogram
            
        
        
            Liping Li, Ke Li, Changchun Liu*, Chengyu Liu & Yuanyang Li
        
        
            World Academy of Science, Engineering and Technology, 2011, 81: 716-719
        
        
[pdf]        
            
        
            
                Comparison of detrending methods in spectral analysis of heart rate variability
            
        
        
            Liping Li, Ke Li, Changchun Liu* & Chengyu Liu
        
        
            Research Journal of Applied Sciences, Engineering and Technology, 2011, 3(11): 292-295
        
        
[pdf]        
            
        
            
                The significance of short-time quantitative analysis of the histogram in patients with congestive heart failure
            
        
        
            Liping Li, Chengyu Liu, Qingguang Zhang, Bin Li & ChangchunLiu*
        
        
            Circulation, 2010, 122(2): 230-231. 
        
        
[pdf]