• Title/Summary/Keyword: modified

Search Result 26,536, Processing Time 0.049 seconds

A Document Classification System Using Modified ECCD and Category Weight for each Document (Modified ECCD 및 문서별 범주 가중치를 이용한 문서 분류 시스템)

  • Han, Chung-Seok;Park, Sang-Yong;Lee, Soo-Won
    • The KIPS Transactions:PartB
    • /
    • v.19B no.4
    • /
    • pp.237-242
    • /
    • 2012
  • Web information service needs a document classification system for efficient management and conveniently searches. Existing document classification systems have a problem of low accuracy in classification, if a few number of feature words is selected in documents or if the number of documents that belong to a specific category is excessively large. To solve this problem, we propose a document classification system using 'Modified ECCD' feature selection method and 'Category Weight for each Document'. Experimental results show that the 'Modified ECCD' feature selection method has higher accuracy in classification than ${\chi}^2$ and the ECCD method. Moreover, combining the 'Category Weight for each Document' feature value and 'Modified ECCD' feature selection method results better accuracy in classification.

Sequential Fault Detection and Isolation for Redundant Inertial Sensor Systems with Uncertain Factors

  • Kim, Jeong-Yong;Yang, Cheol-Kwan;Shim, Duk-Sun
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 2003.10a
    • /
    • pp.2594-2599
    • /
    • 2003
  • We consider some problems of the Modified SPRT(Sequential Probability Ratio Test) method for fault detection and isolation of inertial redundant sensor systems and propose an Advanced SPRT method to solve the problems of the Modified SPRT method. One problem of the Modified SPRT method to apply to inertial sensor system comes from the effect of inertial sensor errors such as misalignment, scale factor error and sensor bias in the parity vector, which make the Modified SPRT method hard to be applicable. The other problem is due to the correlation of parity vector components which may induce false alarm. We use a two-stage Kalman filter to remove effects of the inertial sensor errors and propose the modified parity vector and the controlled parity vector which removes the effect of correlation of parity vector components. The Advanced SPRT method is derived form the modified parity vector and the controlled parity vector. Some simulation results are presented to show the usefulness of the Advanced SPRT method to redundant inertial sensor systems.

  • PDF

The Effect of Modified CIMT Combined with Kinesio-Taping on Upper Limb Function in Hemiplegic Patients (테이핑을 이용한 건측 억제유도 운동이 만성 뇌졸중 환자의 상지기능에 미치는 영향)

  • Kim, Myung-Kwon;Ji, Sang-Ku;Jun, Hye-Jin;Lee, Chang-Ryeol;Lee, Moon-Hwan
    • Journal of the Korean Society of Physical Medicine
    • /
    • v.4 no.3
    • /
    • pp.183-192
    • /
    • 2009
  • Purpose:This study was conducted to investigate whether modified CIMT with Kinesio-Taping on paretic upper limb effects upper limb function in stroke patients in comparison to those receiving only modified CIMT. Methods:20 out-patients with hemiplegia were randomly assigned to either an experimental or a control group. Both groups received modified CIMT during a 10-week period. Additionally, an experimental group received modified CIMT with Kinesio-Taping on paretic upper limb and trunk. Results:In Manual function test, Grip strength, Jebsen-Taylor hand function test, MAL(Motor Activity Log) and Functional independence measure (FIM) were significantly different at all intervals of the study period(0, 3, 6, 10-week) in the experimental and control groups(p<.05). Exceptionally there was no significant difference in Jebsen-Taylor hand function test between the experimental and control groups. Conclusion:These results suggest that modified CIMT with Kinesio-taping improve the upper limb function. And also increase usage of affected upper limb and assist in daily living activity more than only modified CIMT.

  • PDF

A Clinical Study on the Modified RUCAM Application to Liver Injury Induced by Herbal Medicine (한약인성 간손상의 원인산정법으로 도입된 진단 척도(Modified RUCAM scale)에 대한 임상적 고찰)

  • Cheon, Jin-Hong;Min, Sang-Yeon;Kim, Jang-Hyun
    • The Journal of Pediatrics of Korean Medicine
    • /
    • v.22 no.3
    • /
    • pp.83-94
    • /
    • 2008
  • Objectives : The purpose of this study is to confirm severe problem caused by using a modified RUCAM scale than that officially recognized to diagnose liver injury induced by herbal medicine. Materials and Methods : Cases with liver injury induced by herbal medicine received to a related institute from January 2004 to December 2007 were collected and evaluated by the original scale and modified scale. Results : 1. Based on this study, we couldn't clinicaly confirm that the case was not excluded by the relieved first item basis of modified RUCAM scale which has to be excluded by the first item basis of orginal RUCAM scale. 2. By modified 6th item, one score was added to the total score. 3. By adding 8th item, it gaind one point to the whole the total score. Conclusions : In this study, we can clinically confirm that the modified RUCAM application to case with liver injury induced by herbal medicine is a severe problem.

  • PDF

A Novel LDPC Decoder with Adaptive Modified Min-Sum Algorithm Based on SNR Estimation (SNR 예측 정보 기반 적응형 Modified UMP-BP LDPC 복호기 설계)

  • Park, Joo-Yul;Cho, Keol;Chung, Ki-Seok
    • IEMEK Journal of Embedded Systems and Applications
    • /
    • v.4 no.4
    • /
    • pp.195-200
    • /
    • 2009
  • As 4G mobile communication systems require high transmission rates with reliability, the need for efficient error correcting code is increasing. In this paper, a novel LDPC (Low Density Parity Check) decoder is introduced. The LDPC code is one of the most popular error correcting codes. In order to improve performance of the LDPC decoder, we use SNR (Signal-to-Noise Ratio) estimation results to adjust coefficients of modified UMP-BP (Uniformly Most Probable Belief Propagation) algorithm which is one of widely-used LDPC decoding algorithms. An advantage of Modified UMP-BP is that it is amenable to implement in hardware. We generate the optimal values by simulation for various SNRs and coefficients, and the values are stored in a look-up table. The proposed decoder decides coefficients of the modified UMP-BP based on SNR information. The simulation results show that the BER (Bit Error Rate) performance of the proposed LDPC decoder is better than an LDPC decoder using a conventional modified UMP-BP.

  • PDF

(GaN MODFET Large Signal modeling using Modified Materka model) (Modified Materka model를 이용한 GaN MODFET 대신호 모델링)

  • 이수웅;범진욱
    • Proceedings of the IEEK Conference
    • /
    • 2001.06b
    • /
    • pp.217-220
    • /
    • 2001
  • CaN(gallium nitride) MODFET(modulation doped field effect transistor) large signal model was studied using Modified Materka-Kacprzak large signal MODFET model. using the Dambrine's method[3, at 45MHz-40㎓, Measured S-parameter and DC characteristics. based on measuring results, small signal parameter extraction was conducted. by the cold FET[4]method, measured parasitic elements were de-embedding. Extracted small signal parameters were modeled using modified Materka model, a sort of fitting function reproduce measuring results. to confirm conducted large signal modeling, modeled GaN MODFET's DC, S-parameter and Power characteristics were compared to measured results, respectively. by results were represented comparatively agreement, this paper showed that modified Materka model was useful in the GaN MODFET large signal modeling.

  • PDF

EMC/ERH of Rough Rice and Brown Rice (벼 및 현미의 평형함수율/평형상대습도)

  • Choi B. M.
    • Journal of Biosystems Engineering
    • /
    • v.30 no.2 s.109
    • /
    • pp.95-101
    • /
    • 2005
  • Adsorption and desorption experiments were carried out on rough rice and brown rice (Nampyung) at 5, 15, 25, 35, $45^{\circ}C$ for moisture contents between 8.7 and $25\%$ (db). The method employed was to measure the equilibrium relative humidity (ERH) of air in contact with the grain under static conditions, using an electronic hygrometer The effects of temperature and moisture contents were investigated, and the measured values were fitted to the modified Henderson, the modified Chung-Pfost, the modified Halsey and the modified Oswin model. The ERHs of rough rice and brown rice decreased with an decrease in moisture content and temperature, and the effects of temperature was no significant at moisture content of $25\%$ (db). Equilibrium moisture content (EMC) of brown rice was higher than rough rice at same temperature and relative humidity. Desorption EMC is higher than the adsorption, but there is no significant difference between desorption and adsorption EMC in moisture content near $25\%$ (db) at rough rice and near 9, 21 and $25\%$ (db) at brown rice. The modified Oswin model was the best in describing the adsorption EMC and the modified Chung-Pfost model was the best in describing the adsorption ERH of rough rice. The modified Oswin model was the best in describing the adsorption EMC/ERH of brown rice. The modified Chung-Pfost model was the best in describing the desorption EMC/ERH of rough rice and brown rice.

Physicochemical Properties of Enzymatically Modified Maize Starch Using 4-${\alpha}$-Glucanotransferase

  • Park, Jin-Hee;Park, Kwan-Hwa;Jane, Jay-Iin
    • Food Science and Biotechnology
    • /
    • v.16 no.6
    • /
    • pp.902-909
    • /
    • 2007
  • Granular maize starch was treated with Thermus scotoductus 4-${\alpha}$-glucanotransferase (${\alpha}$-GTase), and its physicochemical properties were determined. The gelatinization and pasting temperatures of ${\alpha}$-GTase-modified starch were decreased by higher enzyme concentrations. ${\alpha}$-GTase treatment lowered the peak, setback, and [mal viscosity of the starch. At a higher level of enzyme treatment, the melting peak of the amylose-lipid complex was undetectable on the DSC thermogram. Also, ${\alpha}$-GTase-modified starch showed a slower retrogradation rate. The enzyme treatment changed the dynamic rheological properties of the starch, leading to decreases in its elastic (G') and viscous (G") moduli. ${\alpha}$-GTase-modified starch showed more liquid-like characteristics, whereas normal maize starch was more elastic and solid-like. Gel permeation chromatography of modified starch showed that amylose was degraded, and a low molecular-weight fraction with $M_w$ of $1.1{\times}10^5$ was produced. Branch chain-length (BCL) distribution of modified starch showed increases in BCL (DP>20), which could result from the glucans degraded from amylose molecules transferred to the branch chains of amylopectin by inter-/intra-molecular transglycosylation of ${\alpha}$-GTase. These new physicochemical functionalities of the modified starch produced by ${\alpha}$-GTase treatment are applicable to starch-based products in various industries.

Emulsification of Asphalt Modified with Styrene Butadiene Rubber (SBR) and Styrene Butadiene Styrene (SBS); 1) Phase Stability Behavior and 2) Physical Properties

  • Lee, Eun-Kyoung
    • Elastomers and Composites
    • /
    • v.54 no.4
    • /
    • pp.335-344
    • /
    • 2019
  • In this work, styrene butadiene rubber (SBR) and styrene butadiene styrene (SBS) were used to modify asphalt, resulting in SBR- and SBS-modified asphalt, respectively. The two modified asphalts were emulsified with a nonionic emulsifier (Span 60) and cationic emulsifiers (ID, DDA) and their phase stabilization was investigated via particle size, Zeta potential, and flow behavior analysis. With increasing amount of the mixed emulsifier, the particle size decreased, leading to an increase in viscosity. The shear thinning behaviors and Zeta potential values ranging from 35-65 mV were determined and remained considerably stable. In addition, the adhesion strength and compression strength of the SBR-and SBS-modified asphalt emulsion were evaluated via surface free energy examination. The remarkable adhesion and compression strengths were estimated when 5 phr ID and 6 phr DDA were added to the emulsified asphalt modified with SBR and SBS. Therefore ID and DDA, the two cationic surfactants, played significant roles in improving the dispersion and interfacial adhesion strength, resulting in the improved adhesion and compression strength of the emulsified asphalts modified with SBR and SBS.

Analysis of Mahjor Flavor Compounds in Takju Mash Brewed with a Modified Nuruk (개량누룩으로 제조한 탁주의 중요 향미성분 분석)

  • 이영숙
    • The Korean Journal of Food And Nutrition
    • /
    • v.12 no.4
    • /
    • pp.421-426
    • /
    • 1999
  • The major flavor compounds of Takju mash which was brewed with a modified Nuruk made by inocu-lation and cultivation of Rhizopus japonicus T2, Aspergillus oryzae L2 and Hansenula sp. BC26 isolated from Nuruk, were analyzed, as compared with those with current fermenting agents such as commerical Nur-uk and rice koji of Aspergillus kawachii. The contents of isoamyl alcohol isobutyl alcohol and ethyl acet-ate which were known as aroma compounds in Takju were much higher in mash of modified Nuruk than in that of commercial Nuruk or ricd koji. The major organic acids were lactic fumalic and succinic acid in mash of modified and lactic and acetic acid in mash of commercial Nuruk and citric lactic and suc-cinic acid in mash of rice koji. The contents of total organic acids were 5,146mg/L, 1,706mg/L and 1, 388 mg/L in mash of commercial Nuruk rice koji and modified Nuruk respectively. The major free amino acids were glutamic acid alanine proline and histidine in mash of modified Nuruk and glutamic acid proline leucine and histidine in mash of commercial Nuruk and arginine proline and glutamic acid in mash of rice koji. The contents of total free amino acids were 14,090mg/L 12,202mg/L and 7,152 mg/L in mash of modified Nuruk commercial Nurcuk and rice koji respectively. Therefore it seemed that the Takju mash of modified Nuruk was better than that of commercial Nuruk or rice koji.

  • PDF