Entropy dimension of topological dynamical systems

Dou,Huang, Wen,Park, Kyewon Koh American Mathematical Society 2011 Transactions of the American Mathematical Society Vol.363 No.2

C²-LPC를 이용한 음성인식

이도순,김창석 明知大學校 産業技術硏究所 1995 産業技術硏究所論文集 Vol.14 No.-

This paper is proposed a voice recognition method according to varation of cepstrum LPC data. Generally a speech recognition is made by C-LPC data estimated the OFEC algorithm, but in this paper for the efficient necognition, C-LPC data is transformed to the C2-LPC data, and the C2-LPC data applied to the neural network. As the results that were carried out with the local name, it was formed that the recognition rate of 92.5 percent more than the method by using C-LPC.

PASS (polyamic acid alkylamine salts) LB막의 유전 특성

강도열,김태완,박준수 弘益大學校 科學技術硏究所 1994 科學技術硏究論文集 Vol.4 No.-

Dielectric properties of PAAS LB films were studies in a frequency range of 10 Hz to 13 MHz. Y-type films were made under a surface pressure of 30mN/m using Kuhn type apparatus. It was found that there is a dielectric dispersion of electric polarization near 105 Hz. The effect of electric polarization was also confirmed by charging and discharging current under an application of dc voltage.

효율적 초기해 설정에 의한 중복설계문제의 해법절차

이도경 金烏工科大學校 1991 論文集 Vol.12 No.-

This paper is concerned with redundancy allocation problem to maximize system reliability of multiconstraints mixed parallel-series system. The constraints need not be linear. This paper propose a modification of the Narasimhalu et al. model by introducing an initial solution which has a new criterion and is near to the optimal solution. This criterion accounts for the relative unreliability versus the relative resources for each subsystem. To show the efficiency of this method, numerical example and comparison with Narasimhalu et al. is illustrated in chaper 4.

接木에 關한 硏究 : 第1報 接木後 盛士에 代身한 Vinyl 被覆法에 關하여 Ⅰ. On methods of vinyl covering instead of covering with soil after grafting

朴道秉 진주농과대학 1970 진주농과대학 연구논문집 Vol.- No.9

Vinyl주머니 被覆法 및 Vinyl tunnel法이 在來式인 切接後 盛土法에 代替될 수 있는가를 알고자 本實驗을 하였다. 1. Vinyl주머니 被覆法은 95.5%, Vinyl tunnel 被覆法은 91.1%로 高率의 活着環을 보였고 Vinyl結縛盛土法은 84.4%, 짚 結縛盛土法은 77.7%의 活着率을 보였다. 2. 根頭接에는 Vinyl주머니 被覆法과 Vinyl tunnel法이 다 좋으나, 高接에는 Vinyl주머니 被覆法이 作業이 簡便하고 接穗 採取 貯藏에 制限이 적고 接의 有效時期가 길어 便利하므로 이 法은 利用할 價値가 있다고 생각된다. 3. 小形 Vinyl주머니 (直徑 4.45cm, 길이 20cm)속의 溫度는 外溫보다 若干(0~4˚) 높고 또 袋內의 濕氣는 近飽和狀態이어서 活着率을 높임에 有利한 것 같다. 4. Vinyl주머니 被覆法은 遮光하지 않아도 너무 高溫이 되지않고 5월5일에 當日 採取하여 잎을 除去한 接穗도 活着率(84.4%)이 높으므로 이 方法은 接의 可能時期가 매우 넓어 便利하다. These experiments were carried to discern whether the former method of soil covering after cut-grafting can be replaced by the methods of vinyl bag covering and vinyl tunnel covering. 1. percentages of union by callusing are as follows;95.5% in case of vinyl bag covering, 91.1% in vinyl tunnel covering, 84.4% in soil covering after tying with vinyl, and 77.7% in soil covering after tying with straw. 2. In crow-grafting, both vinyl bag covering and vinyl tunnel covering were satisfactory, but in top-grafting, vinyl bag covering was convenient when working, easy for collecting and preserving of scions, and the limited time of grafting was long. Therefore this method, I think, it very suitable for adopting. 3. The temperature in the small vinyl bag(diameter 4.45cm, length 20cm) is somewhat(0-4℃) higher than the atmospheric temperature and the moisture in the vinyl bag was near saturated condition, so this method is recommendable to increase the rate of graft-union. 4. The temperature in the vinyl bag was not so high, even though not adopting the shade method, and the scions, which were collected on 5th of May and taken off the leaves, were high in union percentage(84.2%), accordingly in this method the available period of grafting is very long.

銀杏나무에 있어서의 車枝에 關한 調査硏究 : 1. Relationship Between the Number of Main Branches on Trunk and Diameter and Area of Small-end and Large-end of the Trunk 第1報 主幹에서 伸出된 主枝數에 따른 上口直徑과 下口直徑 및 上口面積과 下口面積과의 關係

朴道秉 慶尙大學校 1980 論文集 Vol.19 No.1

車枝일때 主幹의 가늘어지는 狀況을 알고자 主幹 30cm 사이에서 伸出된 主枝數別로 直徑과 面積을 計測算出하였던 바 그 結果는 다음과 같다. 1. 下口直徑 平均値 104.57∼149.85㎜ 上口直徑 平均値 83.99∼129.06㎜ 下口面積 平均値 8588∼17636㎟ 上口面積 平均値 5540∼13081㎟ 2. 下口直徑 100에 對한 上口直徑區別 指數 主枝 0枝區 92.47 主枝 1枝區 88.80 主枝 2枝區 87.60 主枝 3枝區 85.91 主枝 4枝區 83.83 主枝 5枝區 82.89 主枝 6枝區 79.61 3. 同回歸方程式 Yd=91.6738-1.9346X 4. 下口面積 100에 對한 上口面積의 區別指數 主枝 0枝區 85.65 主枝 1枝區 79.27 主枝 2枝區 77.09 主枝 3枝區 74.13 主枝 4枝區 70.72 主枝 5枝區 68.89 主枝 6枝區 63.98 5. 同 回歸方程式 Ya=84.1283-3.2961X 6. 以上에 의하여 計數的으로 明瞭한 바와 같이 主幹의 同一 높이 또는 가까운 距離內에서 2枝 以上의 主枝를 伸出시킴은 主幹을 急激히 가늘게 하므로 좋지 않으며 主枝의 數가 많은 車枝일수록 더욱 좋지 않음을 알 수 있다. This experiment was carried out to investigate the effect of main branches on the slenderness of trunks of Ginkgo tree(Ginkgo biloba). Sixty trunks were randomly selected and cut with 30 cm in length, which retained 0 to 6 main branches. Diameters and areas of small-end large-end of the trunks were measured. The results are summarized as follows: 1. Diameters of large-end of the trunks ranged from 104.57 to 149.85mm, and those of small-end, from 83.99 to 129.06mm. Areas of large-end of the trunks ranged from 8588 to 17636㎟, and those of small-end, from 5540 to 13081㎟. 2. Ratios of diameter of small-end to those of large-end were calculated 92.47, 88.80, 87.60, 85.91, 83.83, 82.89, and 79.61mm for trunks with 0, 1, 2, 3, 4, 5 and 6 main branches respectively. 3. Regression equation for the decrease of diameter in accordance with the increase of main branches was estimated as Yd=91.6738-1.9346 X. 4. Ratios of area of small=end to those of large-end were estimated 85.65, 79.27, 77.09, 74.13, 70.72, 67.89, and 63.98 ㎟ for trunks with 0, 1, 2, 3, 4, 5 and 6 main branches respectively. 5. Regression equation for the decrease of area due to the increase of main branches was found as Ya=84.1283-3.2961 X 6. Conclusively, more than two main branches positioned from the near distance caused a significant decrease of both small-end diameter and area in a practical point of view.

저밀도 폴리에틸렌에서 불순물 혼합량에 따른 트리진전과 방전펄스와의 관계 연구

姜道烈,朴懷俊,金正洙 弘益大學校 1982 弘大論叢 Vol.14 No.2

It is well known that, when enough high voltage is applied to a high-voltage cable with an insulator, treeing phenomenon can occur due to void or impurities such as dust, metal powder, etc. inside the insulator. Also,it is known that this treeing phenomenon drastically shortens the life of the insulator. In this paper, we investigate the effects of the mixture ratio of impurities to the Low-Density Polyethylene used as an insulator on the treeing phenomenon based on the electrical characteristics. As impurity samples, Al₂O₃ and SiO₂with the particle diameter of 44μm have been used for different weight mixture ratios of 1%, 5%, and 10%, respectively. Since the treeing phenomenon occurring in the sample, based material of Low-Density Polye thylene mixed with 1% impurity can easily be observed with an optical microscope, we have first investigated the relationship between the result measured from electrical characteristics and the one obtained from observation with an optical microscope. Specifically, it has been found that the total number of pulses measured from the eletrical waveform of the treeing phenomenon is closely related with the growth length of the tree observed with an optical microscope. Based on these results, the growth length of the tree for the other sample materials with 5% and 10% impurities could be estimated from the total number of the electrical tree pulses for these sample materials, respectively. As a result, it has been found that the effect of the treeing phenomenon decreases as the mixture ratio increases. Also, it is shown that the total number of the electrical tree pulses makes it possible to predict the effect of the treeing phenomenon without observing with an optical microscope.

揷木에 關한 硏究 : 第Ⅰ報 사철나무의 揷穗斷面이 發根에 미치는 影響 Ⅰ. Effects on rooting of Euonymus japonicus cuttings by the cutting treatment of the basal surface

朴道秉,朴重春 진주농과대학 1968 진주농과대학 연구논문집 Vol.- No.7

揷木時 揷穗의 基部 斷面 處理가 發根에 어떻게 影響을 미치는가를 알고자 本實驗을 하였다. 아울러 當年技와 前年技間의 發根狀況도 測定 調査하였다. 1. 사철나무 夏揷은 어떤 경우나 100% 發根하였다. 2. 總根數에 있어서는 水平切과 斜切間에는 有意差가 없었고, 當年技揷穗의 경우는 前年技揷穗에 比하여 高度의 有意差가 있었다. 3. 總根長에 있어서도 水平切과 斜切間에는 有意差가 없었고, 當年技揷穗의 경우는 前年技揷穗에 比하여 高度의 有意差가 있었다. Experiments were carried out to observe the effects on rooting by the treatment of basal cut surface. At the same time the differences of rooting between the new shoots and the shoots of past year were studied. 1. The Euonymus japonicus rooted 100% at any case in summer cutting. 2. As for total number of roots, there was no significant difference between horizontal cut surface and oblique cut surface, and there were greater differences in the case of new shoots than in the case of old shoots of past year. 3. As for total length of roots, there was no significant difference between horizontal cut surface, and oblique cut surface, and there were greater differences in the case of new shoots than in the case of old shoots of past year.

이온성 공간전하가 흡수전류에 미치는 영향

姜道烈,李元宰 弘益大學校 1985 弘大論叢 Vol.17 No.2

The effect of ion space function on charging and conduction current was observed using thermally stimulated method. At the temperature the influence of discharging current became negligible for it disappeared instantaneously due to relaxation of the dipole polarization, it was observed that the conduction current was limited and decreased due to the increase of the ion space charge with time. Application of thermally stimulated method to the study of the current characteristics in insulators could be useful to analyze the motion of charged particles.

低密度 폴리에틸렌에서 微粉 SiO₂의 混合比에 따른 Tee進展緩和現象

姜道烈,閔泰雄,柳根敏 弘益大學校 1981 弘大論叢 Vol.13 No.-

In order to investigate the effect of powder SiO₂contained in Low Density Polyethylene (LDPE) for treeing, a comparative study for the developmene of the tree has been carried out between the pure LDPE and the mixed LDPE with a constant weight percent 1, 5 and 10% of the powder SiO₂. According to the result, it has been observed that the development of the tree shows to be relaxed, as increasing the rate of the powder SiO₂contained in LDPE. These phenomena are considered of the reason that the local intensity of electric field, around surfaces of particale SiO₂in LDPE, can be relaxed. 1. 서 론 2. 실험방법 2-1 시편제작 2-2 측정방법 3. 실험결과 및 고찰 3-1 실험결과 3-2 결과고찰 4. 결 론 In order to investigate the effect of powder SiO₂contained in Low Density Polyethylene (LDPE) for treeing, a comparative study for the developmene of the tree has been carried out between the pure LDPE and the mixed LDPE with a constant weight percent 1, 5 and 10% of the powder SiO₂. According to the result, it has been observed that the development of the tree shows to be relaxed, as increasing the rate of the powder SiO₂contained in LDPE. These phenomena are considered of the reason that the local intensity of electric field, around surfaces of particale SiO₂in LDPE, can be relaxed.