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Search Results: 1 - 10 of 16079 matches for " Shanbin Su "
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Study and Application of Acoustic Emission Testing in Fault Diagnosis of Low-Speed Heavy-Duty Gears
Lixin Gao,Fenlou Zai,Shanbin Su,Huaqing Wang,Peng Chen,Limei Liu
Sensors , 2011, DOI: 10.3390/s110100599
Abstract: Most present studies on the acoustic emission signals of rotating machinery are experiment-oriented, while few of them involve on-spot applications. In this study, a method of redundant second generation wavelet transform based on the principle of interpolated subdivision was developed. With this method, subdivision was not needed during the decomposition. The lengths of approximation signals and detail signals were the same as those of original ones, so the data volume was twice that of original signals; besides, the data redundancy characteristic also guaranteed the excellent analysis effect of the method. The analysis of the acoustic emission data from the faults of on-spot low-speed heavy-duty gears validated the redundant second generation wavelet transform in the processing and denoising of acoustic emission signals. Furthermore, the analysis illustrated that the acoustic emission testing could be used in the fault diagnosis of on-spot low-speed heavy-duty gears and could be a significant supplement to vibration testing diagnosis.
Research on Extraction Process of Gallic Acid from Penthorum chinense Pursh by Aqueous Ethanol  [PDF]
Luping Kang, Shanbin Yang, Yan Peng, Jiao Dai, Xingchun Ying
Green and Sustainable Chemistry (GSC) , 2015, DOI: 10.4236/gsc.2015.52009
Abstract: Penthorum chinense Pursh is rich in gallic acid, which has antioxidant, anti-inflammatory, anti-fungal and antitumor activities. In order to optimize their extraction conditions, various extraction parameters were chosen to identify their effects on gallic acid extraction. With extraction amount of gallic acid as index, based on single factor analysis, influence of solid/liquid ratio, ethanol concentration, fetch time and extraction temperature on extraction technology were investigated by orthogonal test. The optimization conditions for gallic acid extraction were determined as follows: ethanol concentration 60%, extraction time 2.5 h, temperature 90°C and solid/liquid ratio 1:30. The corresponding gallic acid content was 4.85%. This optimized extraction process was stable and feasible.
New approach to stochastic stability and controller design for networked control systems

Shanbin LI,Youxian SUN,

控制理论与应用 , 2005,
Abstract: This paper addresses the random time-delays and packet losses issues of networked control systems (NCS) within the framework of jump linear systems with mode-dependent time-delays.A new delay-dependent condition on the stochastic stability is proposed by a new stochastic Lyapunov-Krasovskii functional.The condition is formulated as a set of coupled linear matrix inequalities (LMIs).As an example to verify the proposed method,an inverted-pendulum system with network is considered.The simulation results demonstrate the effectiveness of the method.
Fault Isolation Filter for Networked Control System with Event-Triggered Sampling Scheme
Shanbin Li,Dominique Sauter,Bugong Xu
Sensors , 2011, DOI: 10.3390/s110100557
Abstract: In this paper, the sensor data is transmitted only when the absolute value of difference between the current sensor value and the previously transmitted one is greater than the given threshold value. Based on this send-on-delta scheme which is one of the event-triggered sampling strategies, a modified fault isolation filter for a discrete-time networked control system with multiple faults is then implemented by a particular form of the Kalman filter. The proposed fault isolation filter improves the resource utilization with graceful fault estimation performance degradation. An illustrative example is given to show the efficiency of the proposed method.
Stability Guaranteed Active Fault-Tolerant Control of Networked Control Systems
Shanbin Li,Dominique Sauter,Christophe Aubrun,Joseph Yamé
Journal of Control Science and Engineering , 2008, DOI: 10.1155/2008/189064
Abstract: The stability guaranteed active fault-tolerant control against actuators failures and plant uncertainties in networked control systems (NCSs) is addressed. A detailed design procedure is formulated as a convex optimization problem which can be efficiently solved by existing software. An illustrative example is given to show the efficiency of the proposed method for network-based control for uncertain systems.
Optimal Filters with Multiple Packet Losses and its Application in Wireless Sensor Networks
Yonggui Liu,Bugong Xu,Linfang Feng,Shanbin Li
Sensors , 2010, DOI: 10.3390/s100403330
Abstract: This paper is concerned with the filtering problem for both discrete-time stochastic linear (DTSL) systems and discrete-time stochastic nonlinear (DTSN) systems. In DTSL systems, an linear optimal filter with multiple packet losses is designed based on the orthogonal principle analysis approach over unreliable wireless sensor networks (WSNs), and the experience result verifies feasibility and effectiveness of the proposed linear filter; in DTSN systems, an extended minimum variance filter with multiple packet losses is derived, and the filter is extended to the nonlinear case by the first order Taylor series approximation, which is successfully applied to unreliable WSNs. An application example is given and the corresponding simulation results show that, compared with extended Kalman filter (EKF), the proposed extended minimum variance filter is feasible and effective in WSNs.
Using scores of amino acid topological descriptors for quantitative sequence-mobility modeling of peptides based on support vector machine
Guizhao Liang,Shanbin Yang,Yuan Zhou,Peng Zhou,Zhiliang Li
Chinese Science Bulletin , 2006, DOI: 10.1007/s11434-006-2138-5
Abstract: Scores of amino acid topological descriptors (SATD) derived from principle components analysis of a matrix of 1262 structural variables related to 23 amino acids were employed to express the structure of 125 peptides in different length. Quantitative sequence-mobility modelings (QSMMs) were constructed using partial least square (PLS) and support vector machine (SVM), respectively. As new amino acid scales, SATD including plentiful information related to biological activity were easily manipulated. Better results were obtained compared to those obtained with PLS, which indicated that SVM presented robust stability and excellent predictive ability for electrophoretic mobilities. These results show that there is a wide prospect for the applications of SATD and SVM regression in QSMMs.
Improvement of orbit determination for geostationary satellites with VLBI tracking
Yong Huang,XiaoGong Hu,XiuZhong Zhang,DongRong Jiang,Rui Guo,Hong Wang,ShanBin Shi
Chinese Science Bulletin , 2011, DOI: 10.1007/s11434-011-4647-0
Abstract: China’s COMPASS satellite navigation system consists of five or more geostationary (GEO) satellites. The roles of GEO satellites are to improve the regional user’s positioning accuracy and provide the continuous Radio Determination Satellite Service. The motion of GEO satellites relative to a ground tracking station is almost fixed, and regular orbit maneuvers are necessary to maintain the satellites’ allocated positions above the equator. These features present difficulties in precise orbit determination (POD). C-band ranging via onboard transponders and the L-band pseudo-ranging technique have been used in the COMPASS system. This paper introduces VLBI tracking, which has been successfully employed in the Chinese lunar exploration programs Chang’E-1 and Chang’E-2, to the POD of GEO satellites. In contrast to ranging, which measures distances between a GEO satellite and an observer, VLBI is an angular measurement technique that constrains the satellite’s position errors perpendicular to the satellite-to-observer direction. As a demonstration, the Chinese VLBI Network organized a tracking and orbit-determination experiment for a GEO navigation satellite lasting 24 h. This paper uses the VLBI delay and delay-rate data, in combination with C-band ranging data, to determine the GEO satellite’s orbit. The accuracies of the VLBI delay and delay rate data are about 3.6 ns and 0.4 ps/s, respectively. Data analysis shows that the VLBI data are able to calibrate systematic errors of the C-band ranging data, and the combination of the two observations improves orbit prediction accuracy with short-arc data, which is important for orbital recovery after maneuvers of GEO satellites. With the implementation of VLBI2010, it is possible for VLBI to be applied in the COMPASS satellite navigation system.
SURROUNDING ROCK STRESSES MEASUREMENT BY SLEEVE FRACTURING
巷道围岩应力及力学性质的套筒致裂试验研究

Chou Wanxi Wei Shanbin,
侴万禧
,魏善斌

岩石力学与工程学报 , 1992,
Abstract: Methods and results of measuring surrounding rock stresses andbehaviour are presented in this paper. It is found that these papameters can be measured in situ by a simple and practical technique with nonsophistieated and inexpensive instruments.Specifically, a drillhole dilation technique employing a hydraulic borehole device was used to determine both pre-mining ground pressure and the modulus of rigidity.These devices enable in situ measurement not only of elastic, but also post-elastic, yielding, and failure condition of rock masses, so as to benefit the establishishment of the stress control method on a scientific foundation.
Cancer Chemosensitivity Testing: Review  [PDF]
Yongzhuang Su
Journal of Cancer Therapy (JCT) , 2014, DOI: 10.4236/jct.2014.57076
Abstract:

Since chemotherapy started in 1940s, chemosensitivity testing has been both a very attractive field and one fraught with potential pitfalls. Many methods were developed and brought initial promises, yet later ending in disappointment and were eliminated. For example, in the 1970s clonogenic assay was generally believed to be the best testing method for predicting clinical outcome. However, technical problems including low evaluation rate limited its use. Currently, MTT, ATP, DISC and Kern’s assay hold better promises. Since the 90s, the study of molecular biology has been progressing rapidly. It accelerated the understanding of molecular mechanisms of drug response. Numerous papers were published, but only few techniques can be applied in clinical practice. This review summarizes the controversies and current progress of chemosensitivity assays based on available online information, and makes a suggestion about their future routine practice.

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