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Distally based peroneus brevis muscle flap: A single centre experience

Chinese Journal of Traumatology 2019年第2期22卷 108-112页

作者： subhash Sahu Amish Jayantilal Gohil Shweta Patil Shashank Lamba Kingsly Paul Ashish kumar Gupta Department of Plastic & Reconstructive Surgery Christian Medical College & Hospital Vellore Tamilnadu India

Purpose: Defects aro und the distal one third of the leg and ankle are difficult to man age by con servative measures or simple split thickness skin graft. Distally based peroneus brevis muscle flap is a well described flap for such defects. Methods: This is a retrospective analysis conducted on 25 patients with soft tissue and bony defects of distal third of lower leg and an kle, which were treated using distally based per on eus brevis muscle flap from January 2013 to January 2018. Information regarding patient demographics, etiology, size and location of defects and complications were collected. All patients were followed up for at least 3 months after surgery. Results: There were 21 males and 4 females with the mean age of 39 (5-76) years. The most comm on cause of injuries was road traffic accident, followed by complicated open injury. The average size of defects was 20 (4—50) cm^2. The mean operating time was 75 (60-90) min for flap harvest and inset. We had no patient with complete loss of the flap. Five patients (20%) had marginal necrosis of the flap and two patie nts have graft loss due to un derlyi ng hematoma and required sec on dary split thickness skin grafting. Conclusion: The distally based peroneus brevis muscle flap is a safe optio n w 让h reliable an atomy for small to moderate sized defects following low velocity injury around the ankle. The commonest complication encountered is skin graft loss which can be reduced by primary delayed grafting.

关键词： Peroneus brevis flap Reverse sural artery Tendoachilles Lower leg defects

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Parallel Fuzzy P+Fuzzy I+Fuzzy D Controller:Design and Performance Evaluation

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International Journal of Automation and computing 2010年第4期7卷 463-471页

作者： Vineet kumar A.P.Mittal Department of Instrumentation and Control Engineering Netaji Subhash Institute of TechnologySector-3

In this paper, a parallel fuzzy proportional plus fuzzy integral plus fuzzy derivative （FP＋FI＋FD） controller is proposed. It is derived from the conventional parallel proportional-integral-derivative （PID） controller. It preserves the linear structure of a conventional parallel PID controller, with analytical formulas. The final shape of the controller is a discrete-time fuzzy version of a conventional parallel PID controller. Computer simulations are performed to evaluate the performance of the FP＋FI＋FD controller for setpoint tracking and load-disturbance rejection for some complex processes, such as first- and second-order processes with delay, inverse response process with and without delay and higher order processes. Also, the performance of the proposed fuzzy controller is evaluated experimentally on highly nonlinear liquid-flow process with a hysteresis characteristic due to a pneumatic control valve. The simulation and real time control is done using National InstrumentTM hardware and software （LabVIEWTM）. The response of the FP＋FI＋FD controller is compared with the conventional parallel PID controller, tuned with the Ziegler-Nichols （Z-H） and /~strSm- H^gglund （A-H） tuning technique. It is observed that the FP＋FI＋FD controller performed much better than the conventional PI/PID controller. Simulation and experimental results demonstrate the effectiveness of the proposed parallel FP＋FI＋FD controller.

关键词： Proportional-integral-derivative (PID) fuzzy proportional plus fuzzy integral plus fuzzy derivative (FP+FI+FD) controller liquid-flow process inverse response process dead time.

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Development of a simple RPM measurement system

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Journal of Measurement Science and Instrumentation 2020年第2期11卷 193-196页

作者： Akash kumar Anindya Debnath Antar Banik Kabirul Islam Mondal Partha Pratim Biswas Rik Bhattacharyya T K Maiti Department of Applied Electronics&Instrumentation Engineering Netaji Subhash Engineering CollegeKolkata 700152West Bengal Department of Instrumentation Engineering Central Institute of Technology KokrajharAssam 783370India

The design and development of a timer based revolution per minute(RPM)measurement system were described in this *** rotating shaft of a dc motor was used to measure the RPM and timer integrated circuit(IC)555 was used in astable *** frequency of timer output waveform measured by a digital storage oscilloscope(DSO)is almost linearly proportional to the RPM of rotating shaft,and the RPM also linearly varies with the change of the external input voltage *** the linear relationship between the frequency of timer output waveform and the RPM can be *** main advantages of this developed system are linear input-output relationship,small size,easy to carry and cost effective.

关键词： IC 555 astable multivibrator RPM measurement

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