Changhui Song

  • Citations Per Year
Learn More
A high-performance liquid chromatography method was developed for determination of five nucleotides in Bulbus Fritillariae. The five nucleotides were uridine, adenine, guanosine, thymidine, adenosine, respectively. A Welch materials XB-C18 column (4.6 mm x 250 mm, 5 microm) was used and the chromatographic separation was achieved using 5 mmoL x L(-1)(More)
In order to meet the clinical requirements of spine surgery, this paper proposes the fabrication of the customized template for spine surgery through computer-aided design. A 3D metal printing-selective laser melting (SLM) technique was employed to directly fabricate the 316L stainless steel template, and the metal template with tiny locating holes was used(More)
In this paper, a memoryless H<sub>infin</sub> controller for a class of linear systems with state delay and input delay is presented using linear matrix inequality (LMI) technique. Several sufficient conditions which guarantee the robust asymptotical stability of the closed-loop system are given. All solutions including controller gain can be obtained(More)
In pelvic fracture operations, bone plate shaping is challenging and the operation time is long. To address this issue, a customized bone plate was designed and produced using selective laser melting (SLM) technology. The key steps of this study included designing the customized bone plate, metal 3D printing, vacuum heat treatment, surface post-processing,(More)
A design of the state-feedback controller is given for a tele-operated unmanned underwater vehicle system in this paper. The proposed system with unmanned underwater vehicle, mother-ship, and remote platform can be tele-operated through the radio communication systems. However, time delay on the radio communication systems may make the proposed system(More)
This paper investigates the stability problem of a class of linear control systems with time delay. The analysis result of controller design for this time-delayed system is obtained by using matrix theory technique and two sufficient conditions which guarantee the asymptotical stability of the closed-loop system are given. At last, a numerical example is(More)
This paper deals with the problem of the asymptotical stability for a class of linear systems with multiple time-delays. Using Lyapunov-Razumikhin theorem and the concept of matrix norm, the sufficient conditions of delay-independent stability and delay-dependent stability are derived to ensure that the linear systems with multiple time-delays are(More)
This paper drives the asymptotical stability conditions for a class of linear systems with time delay. First, a series of integral inequalities based on quadratic term are formulated by combining Leibniz-Newton formula. Next, based on Lyapunov-Krasovskii functional method and linear matrix inequality(LMI), the sufficient conditions of delay-dependent(More)
This paper addresses the robust H<sub>infin</sub> control problem of a class of linear systems with state delay. The analysis result of robust H<sub>infin</sub> control for this system is obtained by using linear matrix inequality (LMI) technique and three sufficient conditions which guarantee the robust stability of the closed-loop system are given. All of(More)
  • 1