• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2011년도 추계학술대회
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• pp.535-549
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• 2011

Control chart is most widely used in SPC(Statistical Process Control), Recently it is a critical issue that the standard control chart is not suitable to non-normal process with very small percent defective. Especially, this problem causes serious errors in the reliability procurement, such as semiconductor, high-precision machining and chemical process etc. Procuring process control technique for non-normal process with very small percent defective and perturbation is becoming urgent. Control chart technique in non-normal distribution become very important issue. In this paper, we investigate on research trend of control charts under non-normal distribution with very small percent defective and perturbation, and propose some variable-transformation methods applicable to CUSUM control charts in non-normal process.

• 한방안이비인후피부과학회지
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• 제19권2호
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• pp.59-70
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• 2006

Objective : This study was performed to investigate the Anti-Inflammatory Effects of WooBangHaeGiTang on the Allergic Contact dermatitis. Method : Contact hypersensitivity assay, video microscope, WBC count, RBU count, neutrophil ratio, lymphpcyte ratio and GOT & GPT were measurd. Result : 1. At Contact hypersensitivity Aasay, at 24 hours after Control group & Sample group showed appreciably more ear swelling than Normal group, at 48 hours after Control group showed more ear swelling than Normal group & Sample group, at 72 hours after Control group & Sample group showed more ear swelling than Normal group 2. Regarding the number of WBC, at 24 or 48 hours after There are no significant difference among Normal group, Control group. Sample group, at 72 hours after Sample group showed more WBC than Control group. 3. Regarding the number of RBC, at 24 hours after Control group showed more RBC than Normal group, at 48 hours after Control group & Sample group showed more RBC than Normal group. at 72 hours after Control group showed more RBC than Normal group. 4. Regarding the percentage of neutrophil in WBC, at 24 & 48 hours after Control group & Sample group showed higher percentage than Normal group. 5. Regarding the percentage of Lymphocyte in WBC, at 24 hours after Sample group showed lower percentage than Normal group, at 48 hours after Sample group & Control group showed lower percentage than Normal group. 6. Regarding the GOT & GPT in blood, the GOT & GPT are in Normal scale, so there are no Hepatotoxicity in Normal group, Control group, Sample group. Conclusions : According to above experiments, WooBangHaeGiTang have some anti allergy effects on allergic contact dermatitis.

• 한방안이비인후피부과학회지
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• 제18권1호
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• pp.13-26
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• 2005

Experimental drug was applied to a white male mouse taken ill with allergic contact dermatitis to investigate the effects of Yanghyulsamultanggamibang. 1. In case of skin moisture, when it was checked 72 hours later, there showed up meaningful differences among the normal, control, and sample groups. Especially, the moisture increased more noticeably in the sample group than in the control group. 2. With regards to RBC count in blood, it increased more in the control and sample groups than in the normal group when it was checked both in 24 hours and 72 hours. When it was checked in 48 hours, the number of RBC in the sample group increased the most, and the count in the control group increased more than in the normal group. 3. About the neutrophil rate in WBC count, it increased meaningfully more both on the control and sample groups than in the normal group in 24 hours. When the rate was checked in 48 hours, it increased the most in the sample group, and it increased more in the control group than in the normal group. When in checked72 hours later, it increased substantially more in the control group than both the sample and normal group. 4. As of the lymphocyte rate in WBC count, when measured in 24 hours, it increased in the normal group than in the control and sample groups. In 48 hours, it increased the most in the normal group, and it increased meaningfully more in the control group than in the sample group. 5. Regarding the total IgE, when measured 24 hours later, it increased noticeably more in the normal group than in the control and sample groups. In 48 hours, there showed up substantial differences among the normal, control and sample groups. In particular, it increased meaningfully more in the control group than in the sample group. 6. When the sample of skin tissue was examined, the corneal layer restoration increased more in the sample group than in the normal group. The above-mentioned results prove that Yanghyulsamultanggamibang can be taken when allergic contact dermatitis develops on the skin. Long-term observation afterward is also advised.

• 산업경영시스템학회지
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• 제29권2호
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• pp.97-103
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• 2006

Recently, the control chart is developed for monitoring processes with normal short production runs by the coefficient of variation(CV) characteristic for a normal distribution. This control chart does not work well in non-normal short production runs. And most of industrial processes are known to follow the non-normal distribution. Therefore, the control chart is required to be developed for monitoring the processes with non-normal short production runs by the CV characteristics for a non-normal distribution. In this paper, we suggest the control chart for monitoring the processes with a gamma short runs by the CV characteristics for a gamma distribution. This control chart is denoted by the gamma CV control chart. Futhermore evaluated the performance of the gamma CV control chart by average run length(ARL).

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2013년 춘계학술대회
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• pp.547-556
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• 2013

Control chart is most widely used in SPC(Statistical Process Control), Recently it is a critical issue that the standard control chart is not suitable to non-normal process with very small percent defective. Especially, this problem causes serious errors in the reliability procurement, such as semiconductor, high-precision machining and chemical process etc. Procuring process control technique for non-normal process with very small percent defective and perturbation is becoming urgent. Control chart technique in non-normal distribution become very important issue. In this paper, we investigate on research trend of control charts under non-normal distribution.

• Journal of Power Electronics
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• 제19권4호
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• pp.989-999
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• 2019

This paper proposes a fault-tolerant control strategy with finite control set model predictive control (FCS-MPC) based on hierarchical optimization for five-level H-bridge neutral-point-clamped (5L-HNPC) inverter-fed induction motor drives. Fault-tolerant operation is analyzed, and the fault-tolerant control algorithm is improved. Adopting FCS-MPC based on hierarchical optimization, where the voltage is used as the controlled objective, called model predictive voltage control (MPVC), the postfault controller is simplified as a two layer control. The first layer is the voltage jump limit, and the second layer is the voltage following control, which adopts the optimal control strategy to ensure the current following performance and uniqueness of the optimal solution. Finally, simulation and experimental results verify that 5L-HNPC inverter-fed induction motor drives have strong fault tolerant capability and that the FCS-MPVC based on hierarchical optimization is feasible.

• 품질경영학회지
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• 제44권1호
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• pp.167-180
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• 2016

Purpose: The problem for the traditional control chart is that it is unable to monitor the very small fraction of nonconforming and the underlying distribution is the normal distribution. $Z_p$ control chart is useful where it controls the vert small fraction on nonconforming. In this study, we will design the $Z_p$ control chart in order to use under non-normal process. Methods: $Z_p$ is calculated not by failure rate based on attribute data but using variable data. Control limit for non-normal $Z_p$ control chart is designed based on ${\alpha}$-risk calculated by cumulative distribution function of Burr distribution. ${\beta}$-risk, which is for performance evaluation, obtains in the Burr distribution's cumulative distribution function and control limit. Results: The control limit for non-normal $Z_p$ control chart is designed based on Burr distribution. The sensitivity can be checked through ARL table and OC curve. Conclusion: Non-normal $Z_p$ control chart is able to control not only the very small fraction of nonconforming, but it is also useful when $Z_p$ distribution is non-normal distribution.

• Nuclear Engineering and Technology
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• 제39권1호
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• pp.63-74
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• 2007

In this paper, a reconfigurable controller consisting of a normal controller and a standby controller is designed to control the thermoelectric (TE) power in the SP-100 space reactor. The normal controller uses a model predictive control (MPC) method where the future TE power is predicted by using support vector regression. A genetic algorithm that can effectively accomplish multiple objectives is used to optimize the normal controller. The performance of the normal controller depends on the capability of predicting the future TE power. Therefore, if the prediction performance is degraded, the proportional-integral (PI) controller of the standby controller begins to work instead of the normal controller. Performance deterioration is detected by a sequential probability ratio test (SPRT). A lumped parameter simulation model of the SP-100 nuclear space reactor is used to verify the proposed reconfigurable controller. The results of numerical simulations to assess the performance of the proposed controller show that the TE generator power level controlled by the proposed reconfigurable controller could track the target power level effectively, satisfying all control constraints. Furthermore, the normal controller is automatically switched to the standby controller when the performance of the normal controller degrades.

• 대한한방내과학회지
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• 제19권2호
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• pp.278-299
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• 1998

This study was aimed to evaluate the anti-stress effect of danchisoyosan on the rats stressed by immobilization. The experimental animals were immobilized in the stress box($5{\times}5{\times}20cm$) for 12 hours in a day during 3 days, and administered $500mg/5m{\ell}/g$ of Danchisoyosan extract for 14 days before stress. There were measured the change of body weight and organ weight under immobilized-stress. The norepinephrine, epinephrine, dopamine, serotonine contents were measured by HPLC method in rat brain. There were measured the GOT, GPT contents in serum and tissue lipid peroxidation in the brain, liver, spleen, adrenalgland, pancreas, testes, thymus, heart. The following results were obtained: 1. The change of organ weight was significantly lower in control than normal group. Sample group inhibited decreased weight from stress comparing to control group. 2. Lipid peroxidation in the liver was significantly higher in control than normal group. Sample group shows significant decrease comparing to control group. 3. Lipid peroxidation in the kidney was significantly higher in control than normal group. Sample group shows significant decrease comparing to control group. 4. GPT contents in serum was significantly higher in control than normal group. Sample up shows significant decrease comparing to control group. 5. Dopamine contents in the brain was significantly higher in control than normal group. Sample group shows significant decrease comparing to control group. 6. Serotonine contents in the brain was significantly higher in control than normal group. Sample group shows significant decrease comparing to control group.

• 정신신체의학
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• 제5권2호
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• pp.158-167
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• 1997

Objectives: This study was aimed to investigate the emotional state and personality characteristics of alopecia aerata patient and to determine whether these characteristics are similar with those of neurotic patient. Methods : 20 alopecia aerata patients, 20 neurotic patients, and 20 normal healthy controls were studied. Beck Depression Inventory(BDI), State and Trait Anxiety Inventory(STAI) and Korean standardized edition of Catell's 16 Personality factors Questionnaire(16PF) were used for assessment. Results: 1) Total score of BDI was higher in neurosis group than alopecia aerata group and normal control group(p<0.05). Inspire of statistical non-significance, total score of in alopecia aerata group was higher than normal control group. 2) Total scores of state anxiety and trait anxiety in alopecia aerata and neurosis group were significantly higher than normal control group(p<0.001). 3) In first-stratum source traits of 16PF, normal control group was significantly higher than alopecia aerata group and neurosis group in B-factor(intelligence) and C-factor(ego-strength)(p<0.05). Alopecia aerata group and neurosis group were significantly higher than normal control group in O-factor(guilt-proneness) and $Q_4-factor(tension,\;anxiety)$(p<0.001). 4) In second-stratum source traits of 16PF, alopecia aerata group and neurosis group were significantly higher than normal control group in ANX-factor(anxiety)(p<0.05). Conclusions : These results suggest that emotional state and personality characterstics of patients with alopecia aerata are a distinguishable different to compare with normal control, and are very similar with those of neurotic patients. The authors propose that psychiatric management in patient with alopecia aerata will be more benificial.