• Journal of Information Processing Systems
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• v.18 no.6
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• pp.763-769
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• 2022

Transportation allocation requires information such as storage location and order information. In order to guarantee the safe transmission and real-time sharing of information in all links, an intelligent transportation control system based on blockchain technology is designed. Firstly, the technical architecture of intelligent transportation information traceability blockchain and the overall architecture of intelligent transportation control system were designed. Secondly, the transportation management demand module and storage demand management module were designed, and the control process of each module was given. Then, the type of intelligent transportation vehicle was defined, the objective function of intelligent transportation control was designed, and the objective function of intelligent transportation control was constructed. Finally, the intelligent transportation control was realized by genetic algorithm. It was found that when the transportation order volume was 50×103, and the CPU occupancy of the designed system was only 11.8%. The reliability attenuation of the code deletion scheme was lower, indicating better performance of the designed system.

• Journal of The Korean Society of Integrative Medicine
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• v.8 no.2
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• pp.211-220
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• 2020

Purpose : The purpose of the present study is to examine the effects of VR training with FES on improving the muscle strength, AROM, and function of the upper limb joints in patients with chronic stroke. Methods : The present study makes use of a pre-post control group design. Thirty patients with chronic stroke were randomly assigned to two groups according to treatment method - the VRFES group and the control group. The VRFES group received 15 minutes of VR training and 15 minutes of FES treatment. The control group received 15 minutes of conservative physical therapy and 15 minutes of VR training. All subjects received 30 minutes of treatment, three times a week, for eight weeks, which amounted to 24 sessions of training. The muscle strength, AROM, and function of the upper extremities were measured before the training and eight weeks after. Upper limb muscle strength was tested using the Digital Manual Muscle Tester while AROM was measured using the Digital Dual Inclinometer. The clinical assessment tools for upper extremity function included the use of the Manual Function Test and the Jebsen-Taylor Hand Function Test. Results : Both groups exhibited great improvements in muscle strength and upper extremity function during the intervention period. The VRFES group exhibited a significant difference in muscle strength, AROM, and function of the upper extremities in comparison with the control group(p<.05). Our results reveal that VRFES is more effective for the muscle strength, AROM, and function of the upper extremities in patients with chronic stroke. Conclusion : VRFES treatment will be used as an important intervention for improving the muscle strength, AROM, and function of the upper extremities in patients with chronic stroke and achieving the functional recovery of the upper extremities.

• Korean Journal of Adult Nursing
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• v.27 no.6
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• pp.707-717
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• 2015

Purpose: This study was to develop and verify the effects of the exercise-cognitive combined dual-task training program on cognitive function and depression of the elderly with mild cognitive impairment (MCI). Methods: A non-equivalent control group pretest-posttest design was used. The participants were assigned into two groups: an experimental group receiving an exercise-cognitive combined dual-task (n=20) and a control group receiving a simple-task (n=18). After 8 weeks of intervention (2 days per week), the change in depression and cognitive functions were compared between the groups. Results: General cognitive function (t=-2.81, p=.011), frontal cognitive function (Z=-3.50, p<.001), attention/working memory function (U=-2.91, p=.004), depression (t=4.96, p<.001) of the experimental group were significantly increased than those of the control group. Conclusion: The findings of the study showed that an exercise-cognitive combined dual-task program for MCI was effective in improving general cognitive function, frontal and executive function, attention/working memory function, and reducing depression.

• Journal of Institute of Control, Robotics and Systems
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• v.16 no.3
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• pp.249-255
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• 2010

The paper proposes a new type of robust speed control strategy for permanent magnet synchronous motor by using PD-sliding mode hybrid control. The PD control has a good performance in the transient region while the sliding mode controller provides the robustness against system uncertainties. Taking advantages of the two control strategies, the proposed control method utilizes the PD control in the approaching region to the sliding surface and the sliding mode control near at the sliding surfaces. The chattering problem of the sliding mode controller is eliminated by applying the saturation function for the switching function of the sliding mode control. The stability of the sliding mode control is verified by using Lyapunov function with the proper selection of variable gains. It is shown that with this simple switching algorithm, stability of the overall hybrid control system is ensured. Through the simulations, the PD-sliding mode algorithm is shown to have a good performance in the transient response as well as being robust against disturbances. The robustness of the PD-sliding mode algorithm is further demonstrated against various external disturbances in the real experiments of SPMSM motor control.

• 한국기계연구소 소보
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• s.15
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• pp.105-115
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• 1985

For the application of factory automation, a 3-axis numerical control system with personal computer and KM3701 function generator LSI chip, which has liner, circular, parabolic, logarithmic, and exponential interpolations, is developed. The developed system also has 2 control function to stabilize tooling speed and 1/1000mm step sizes.

• Journal of Institute of Control, Robotics and Systems
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• v.15 no.11
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• pp.1071-1075
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• 2009

This article describes a robust control method by using peak control of a sensitivity function in the state-feedback control systems. This method apparently reduces the peak, and as a result makes closed loop systems more stable. The designed closed loop systems also make the response to an external step disturbance more fast with a lower undershoot. At the conclusion, it is verified that the proposed method enhances robust stability and robust performance to parametric uncertainties through $\mu$-plot.

• 제어로봇시스템학회:학술대회논문집
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• 1991.10a
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• pp.12-17
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• 1991

In this paper, a variable structure system control method is proposed to the trajectory control of robot arm. A proposed method uses nonlinear switching function and saturation function. Furthermore, learning control method uses to decrease of the following error. The computer simulation results show that the chattering and the following error decrease and is improved the control the performance by a proposed method.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2000.10a
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• pp.135-139
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• 2000

This research proposes a nonlinear sliding mode control. The sliding mode control is designed according to Lyapunov function. The equivalent control term is estimated by neural network. To estimate the unknown part in the control law in on-line fashion, A recurrent neural network is given as on-line estimator. The stability of the control system is guaranteed owing to the on-line learning ability of the recurrent neural network. It is certificated through simulation results to be applied to nonlinear system that the function approximation and the proposed control scheme is very effective.

• Journal of the Korean Society of Physical Medicine
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• v.6 no.4
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• pp.381-389
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• 2011

Purpose : The purpose of this study was to compare the respiratory function in the different body position of the stroke patients. Methods : Twenty patients with stroke patients group(M:12, F:8) and twenty control group(M:12, F:8) were participated in experiment. Strokes patients group and control group were assessed according to position changes(supine position, $45^{\circ}$ sitting position, $90^{\circ}$ sitting position) using pulmonary function(vital capacity, inspiratory capacity, tidal volume, expiratory reserve volume, inspiratory reserve volume). Results : These findings suggest that supine position in stroke group and control group were significant difference in IC, VC, IRV, ERV(p<.05). $45^{\circ}$ lean sitting position in stroke group and control group were significant difference in IC, VC, ERV(p<.05). 90 sitting position in stroke group and control group were significant difference in VC, IRV, ERV(p<.05). In comparison of two groups, strokes group was more low pulmonary function than normal group. Conclusion : This study showed pulmonary function was more high normal groups than stroke groups. And $90^{\circ}$ sitting position was high pulmonary function than supine position, $45^{\circ}$ lean sitting position. Thus it indicates that the functions will be suggest the objective data of patients with strokes for respiratory function.

• The Korean Journal of Rehabilitation Nursing
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• v.4 no.1
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• pp.84-93
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• 2001

The effects of brisk walking & muscle strengthening exercise on pain, fatigue, physical function & disease activity were examined in 28 patients with rheumatoid arthritis. Research design was a quasi-experimental study of non-equivalent control group pretest-posttest design. 14 for the experimental group and 14 for the control group were selected from the out patients on rheumatoid arthritis clinic of Dong-A University Hospital. The experimental group underwent 16 weeks of brisk walking and muscle strengthening exercise using Thera-Band. Pain, fatigue, physical function & disease activity was measured before and after 16 weeks of exercise. At baseline test, Fatigue & physical function score between groups were significantly different. So differences with in experimental group(baseline versus follow up) were compared with differences within the control group by Mann-Whitney test. There were significant differences between groups in the difference score on pain (U=6.50 p<.001) and fatigue (U=26.5 p<.01). For the experimental group, the score on the pain & fatigue was significantly decreased but no changed for the control group. Also there was a significant differences between groups in the difference score of the physical function (U=22.5 p<.001). For the experimental group, the score of the physical function has been significantly in creased. However, for the control group, it has been no changed. But there were no significant differences between groups in the ESR (erythrocyte sedimentation rate) and the CRP (C-reactive protein)level. In summary, brisk walking & muscle strengthening exercise led to significant improvements in pain, fatigue, and physical function without exacerbating disease activity in patients with rheumatoid arthritis.