期刊文献+
共找到5篇文章
< 1 >
每页显示 20 50 100
H_-/H_∞ fault detection filter design for interval time-varying delays switched systems 被引量:2
1
作者 Jiawei Wang Yi Shen Zhenhua Wang 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2016年第4期878-886,共9页
The problem of the robust fault detection filter design for time-varying delays switched systems is considered in the framework of mixed H-/H∞. Firstly, the weighted H∞ performance index is utilized as the robustnes... The problem of the robust fault detection filter design for time-varying delays switched systems is considered in the framework of mixed H-/H∞. Firstly, the weighted H∞ performance index is utilized as the robustness performance, and the H- index is used as the sensitivity performance for obtaining the robust fault detection filter. Then a novel multiple Lyapunov-Krasovskii function is proposed for deriving sufficient existence conditions of the robust fault detection filter based on the average dwell time technique. By introducing slack matrix variable, the coupling between the Lyapunov matrix and system matrix is removed, and the conservatism of results is reduced. Based on the robust fault detection filter, residual is generated and evaluated for detecting faults. In addition, the results of this paper are dependent on time delays,and represented in the form of linear matrix inequalities. Finally,the simulation example verifies the effectiveness of the proposed method. 展开更多
关键词 switched system average dwell time mixed H-/H∞ robust fault detection filter time-varying delay
下载PDF
Toward real-time digital pulse process algorithms for CsI(Tl)detector array at external target facility in HIRFL-CSR 被引量:1
2
作者 Tao Liu Hai-Sheng Song +13 位作者 Yu-Hong Yu Duo Yan Zhi-Yu Sun Shu-Wen Tang Fen-Hua Lu Shi-Tao Wang Xue-Heng Zhang Xian-Qin Li Hai-Bo Yang Fang Fang Yong-Jie Zhang Shao-Bo Ma Hooi-Jin Ong Cheng-Xin Zhao 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2023年第9期8-20,共13页
A fully digital data acquisition system based on a field-programmable gate array(FPGA) was developed for a CsI(Tl) array at the external target facility(ETF) in the Heavy Ion Research Facility in Lanzhou(HIRFL). To pr... A fully digital data acquisition system based on a field-programmable gate array(FPGA) was developed for a CsI(Tl) array at the external target facility(ETF) in the Heavy Ion Research Facility in Lanzhou(HIRFL). To process the CsI(Tl) signals generated by γ-rays and light-charged ions, a scheme for digital pulse processing algorithms is proposed. Every step in the algorithms was benchmarked using standard γ and α sources. The scheme, which included a moving average filter, baseline restoration, leading-edge discrimination, moving window deconvolution, and digital charge comparison, was subsequently implemented on the FPGA. A good energy resolution of 5.7% for 1.33-MeV γ-rays and excellent α-γ identification using the digital charge comparison method were achieved, which satisfies CsI(Tl) array performance requirements. 展开更多
关键词 CsI(Tl)array On-line digital algorithms Moving average filter Moving window deconvolution On-line particle identification algorithms
下载PDF
Comparative analysis of interdecadal precipitation variability over central North China and sub Saharan Africa
3
作者 OGOU Faustin Katchele YANG Qing +1 位作者 DUAN Yawen MA Zhuguo 《Atmospheric and Oceanic Science Letters》 CSCD 2019年第3期201-207,共7页
The interdecadal variability of precipitation over sub-Saharan Africa (SSA) and central North China (CNC) is examined and compared in this study. Previous studies have found that the two regions have similar interdeca... The interdecadal variability of precipitation over sub-Saharan Africa (SSA) and central North China (CNC) is examined and compared in this study. Previous studies have found that the two regions have similar interdecadal dry–wet evolution in the past 100 years. The results show obvious decadal precipitation fluctuations in the two regions. In CNC, a persistent negative precipitation anomaly is detected from the early 1970s to the 2000s. In SSA, a negative precipitation anomaly is apparent since the late 1970s, while a distinct upward trend is found since the 1990s although the precipitation anomaly is still negative. Significant correlation is found between the decadal precipitation anomalies in SSA and the SST modes (Atlantic Multidecadal Oscillation (AMO) and Pacific Decadal Oscillation (PDO)), as well as the North Atlantic Oscillation (NAO), while in CNC the decadal precipitation is influenced by the NAO and PDO. The EOF results show that the total explained variance of the first four EOFs in SSA is smaller than that of CNC. The fourth and third modes in SSA are significantly associated with the AMO and PDO respectively, while the first, third, and fourth modes are significantly associated with the NAO. The first mode in CNC is significantly associated with the NAO. The first mode of the precipitation anomaly in SSA fluctuates out of phase with that in CNC, while in-phase changes are apparent among the third and the fourth modes. 展开更多
关键词 Decadal variability moving average filter empirical orthogonal function cumulative sum chart sub- Saharan Africa central North China
下载PDF
Removal of baseline wander from ECG signal based on a statistical weighted moving average filter 被引量:3
4
作者 Xiao HU Zhong XIAO NiZHANG 《Journal of Zhejiang University-Science C(Computers and Electronics)》 SCIE EI 2011年第5期397-403,共7页
Baseline wander is a common noise in electrocardiogram (ECG) results.To effectively correct the baseline and to preserve more underlying components of an ECG signal,we propose a simple and novel filtering method based... Baseline wander is a common noise in electrocardiogram (ECG) results.To effectively correct the baseline and to preserve more underlying components of an ECG signal,we propose a simple and novel filtering method based on a statistical weighted moving average filter.Supposed a and b are theminimum and maximum of all sample values within a moving window,respectively.First,the whole region [a,b] is divided into M equal sub-regions without overlap.Second,three sub-regions with the largest sample distribution probabilities are chosen (except M<3) and incorporated into one region,denoted as [a 0,b 0 ] for simplicity.Third,for every sample point in the moving window,its weight is set to 1 if its value falls in [a 0,b 0 ];otherwise,its weight is 0.Last,all sample points with weight 1 are averaged to estimate the baseline.The algorithm was tested by simulated ECG signal and real ECG signal from www.physionet.org.The results showed that the proposed filter could more effectively extract baseline wander from ECG signal and affect the morphological feature of ECG signal considerably less than both the traditional moving average filter and wavelet package translation did. 展开更多
关键词 ECG signal Baseline wander Morphological feature Moving average filter Wavelet package translation
原文传递
Improved Scheme of Internet Congestion Control under Moving Average Filter 被引量:1
5
作者 刘玉良 朱杰 +1 位作者 詹振球 任尹飞 《Journal of Shanghai Jiaotong university(Science)》 EI 2009年第6期641-644,共4页
An important task of Internet congestion control is inhibiting sporadic data flow to maintain a suitable window size or route queue length. Such a requirement is just consistent with the basic idea and function of a m... An important task of Internet congestion control is inhibiting sporadic data flow to maintain a suitable window size or route queue length. Such a requirement is just consistent with the basic idea and function of a moving average filter. In this paper one prior Internet congestion control model, named transmission control protocol (TCP)/random early detection (RED) stroboscopic model, is studied, and then one new scheme is proposed to enlarge its stable domain, where a simple moving average filter is introduced to inhibit sporadic data flow as possible. In the novel scheme the bifurcation phenomenon is postponed without any extra controller. The effectiveness of the new scheme is verified by theoretical analyses and numerical simulations. 展开更多
关键词 moving average filter INTERNET congestion control BIFURCATION
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部