The Nonlinear Equivalent Input Disturbance Coordinated Control for Enhancing the Stability of Hydraulic Generator System

Lan‑Mei Cong,Xiao‑Cong Li 대한전기학회 2020 Journal of Electrical Engineering & Technology Vol.15 No.2

Hydraulic generator plays more important roles as a renewable clean energy in improving stability. As hydraulic generator enjoys strong nonlinear properties, traditional linearized control method may holds worse adaptability for vary disturbances. In order to solve the problem, a Nonlinear Equivalent Input Disturbance Coordinated Control (NEIDCC) method is proposed in this paper. The objective functions related to system control performance are frstly determined. Then the multi-objective equations satisfying the Brunovsky normal form are derived, by which the nonlinear control problem is transformed to linear space to be solved. The nonlinear equivalent control law is obtained from the linear law by calculating the Γ derivative of the objective functions. When the system is subjected to diferent disturbances, the designed NEIDCC control law supports dynamic damping by observing the disturbance to stabilize the oscillations. As a result, the control system holds good performance. The simulation results of the designed hydraulic turbine generator control system demonstrate the efectiveness of the NEIDCC method.

A Note on Aspectual Properties of Korean Idioms

Lan Kim 한국생성문법학회 2018 생성문법연구 Vol.28 No.3

Kim, Lan. 2018. A Note on Aspectual Properties of Korean Idioms. Studies in Generative Grammar, 28-3, 433-447. This paper investigates aspectual properties of idiomatic expressions in Korean, the data that have not received much attention in the study of Korean idioms. Extending McGinnis’ (2002, 2005) observation concerning English, I examine aspectual behaviors of phrasal idioms in Korean and show that the meaning of phrasal idioms in Korean follows from the composition of their parts. If the current work is on the right track, it may offer support to the argument that has been made in generative grammar in which idioms are not just random units but may act as systematic and compositional phrases.

Talking about Kunqu Opera

An Lan 한국콘텐츠학회 2021 한국콘텐츠학회 ICCC 논문집 Vol.2021 No.12

Talking about Kunqu Opera

An Lan 한국콘텐츠학회 2021 ICCC International Digital Design Invitation Exhib Vol.2021 No.12

标准成本法与作业成本法融合的研究

徐香?(Xu, Xiang-Lan),金春洙(Kim, Chun-Soo) 한국국제회계학회 2017 국제회계연구 Vol.0 No.75

With the rapid development of science and technology and the popularization of information technology, the production environment and manufacturing processes have changed significantly, enterprises increasingly rely on machines and computer control program. The proportion of direct labor costs in the product cost structure has sharply declined, while the proportion of manufacturing cost has increased substantially. With the change of product cost structure, the focus of cost control is gradually shifted from direct material cost and direct labor cost to the manufacturing cost. In order to adapt to the new manufacturing environment, establishing a scientific cost management system has become an inevitable trend. Although the standard cost method provides a cost basis for cost control and performance evaluation, it is not easy to find out the specific link of the cost variance due to too single manufacturing cost distribution standard. Therefore, it is necessary to introduce the basic idea of activity-based costing in the process of setting product standard cost. Based on the activity, the manufacturing cost of the product is allocated by different allocation ratio to ensure the accuracy of product cost accounting. This paper which is based on the standard cost method and activity-based cost method discusses the necessity for the integration of both, and describes its application in Boiler Manufacturing X Co. Ltd. to seek a new cost management model to adapt to the manufacturing environment of modern enterprises. Through the integration of standard cost method and activitybased costing method, the enterprise management goal and the specific production operation are combined to achieve the effective control of product cost.

Verb Copying and Situation Delimiters in Chinese

박혜선,Zhang Lan 대한언어학회 2006 언어학 Vol.14 No.2

Park, Hyeson & Zhang, Lan. 2006. Verb Copying and Situation Delimiters in Chinese. The Linguistic Association of Korea Journal, 14(2), 115-131. Chinese has the verb copying construction, in which a verb is copied after a non-referential/non-specific object in the presence of adverbial elements such as duration and frequency phrases, or the complex stative construction. Several analyses have been proposed for this construction from both formal and functional perspectives. Among the formalists, Yi (1990) proposes that verb copying occurs to assign case to the adverbial, which is an NP in Chinese. In this paper, incorporating Yi's case approach and Wechsler and Lee's (1996) theory on 'situation delimiters', and in comparison with Korean accusative marked adverbials, we propose a new analysis of the verb copying construction. Wechsler and Lee (1996) propose that accusative marked adverbials in Korean are situation delimiters and they get accusative case due to the universal principle, Case Domain Generalization (CDG), which states that the domain of direct case for a predicate may be extended to include a situation delimiter. Contrary to Wechsler & Lee, however, we propose that CDG is not a universal principle; rather, it is parameterized depending on whether multiple accusative case checking is allowed or not in a language. Since Chinese does not allow multiple case checking, verb copying is utilized to license the situation delimiters.

日帝時의 家族倫理 意識

申蘭植 순천대학교 사회과학연구소 1990 社會科學硏究 Vol.3 No.-

This thesis is an attempt to examine the sense of family morals in the period of the Japanese rule through analusis of the family morals in the primary and middle school textbooks of moral cultivation and to illuminate it from the contemporary point of view. 1. The members of a family were subject to the family and should do their best for continuation and development of the family. The sense of family put a great value on the family, based on exclusion on the western individualism and sacrifice of the family menbers. 2. The relationship of parents and children was regarded as relation of surbordination ; the filial duty emphasizes children's obedience to parents more than the obligations as parents. 3. The conjugal relation was based on that of domination and obedience like master and servant rather than on that of equal comradeship. 4. Since the idea of ancestor worship and family concore was emphasized based on continuation of and respect for the family, it is attended by many evils. In the sense of family morals in the period of the Japanese rule was preserved the traditional sense of family morals valued highly in Sodang and Hyanggyo of our country. Even though the school system itself was the western style, the family morals taught there was not the western modern family morals, but the purely traditional family moals.

감자의 수침조건에 따른 전분의 이화학적 특성

정난희,김경애 全南大學校家政科學硏究所 1999 生活科學硏究 Vol.9 No.-

Physicochemical properties of potato starches which were prepared by steeping at 10 ±1℃ and 25 ±1℃ for 11days were investigated. The pH of steeped water were increased during steeping. Shapes of all starch granules were round and polygonal, but size was decreased and some part of starch granule had porous surface by steeping. X-ray diffraction pattern was all B-type. Relative crystallinity was increased until 9 days at 10, 7 days at 25℃ of steeping and decreased thereafter. Protein, lipid and phosphorus in starch were decreased, but ash was increased by increasing steeping time. Amylose content and density were decreased, but water binding capacity was increased by steeping. Swelling power and solubility were decreased with increasing steeping. The intrinsic viscosity of potato starch was decreased by steeping.

'사과배' 원 조성사업의 경제적 타당성분석 : 중국 연변지역을 중심으로

조란화,임재환 충남대학교 농업과학연구소 2002 농업과학연구 Vol.29 No.1

The most representative fruit in Yanbian area is Applepear(Ping Guo Li). It has been a important resource of farm income. According to the economic growth and income increase of individual consumers, food consumption pattern will be changed from grain to high value cash crops such as Applepear and vegetables. The globalization and adaption of free market oriented economic policy of China government have led to change the collective farming system to individual farm management system. The institutional transformation have brought about high productivity of farm products and incomes of farmers. Therefore the plantation area of Applepear and requirement of investment cost for establishment of Applepear farms have increased rapidly since the 1980's, the time of perestroika and glasnost in Chinese economy. In prosperity of Chinese agriculture, individual farmer's decision making as free selection of farmland use, selection of high pay-off crops, free sale of the products in free market and credit support for the project might be the most important factors. In case of Applepear farm development, net present value of the project net benefit was estimated at 55,518won per hectare and financial rate of return was 21%. The benefit/cost ratio of the project was 2.11. Considering 10% of discounting rate or the opportunity cost of capital in China the Applepear farm development project showed us economically feasible in the light of the above efficiency indices. The Chinese government has to support Applepear farm development project financially and institutionally considering the high-pay off benefit of the fruit and farmer's income increase in the future.

순천대학교 사범대학 발전 및 특성화 방안 연구

신란식,신향근,이화자 순천대학교 1996 大學發展硏究論文集 Vol.2 No.-

The purpose of this study was to present development plans and to draw up measures to specialize the College of Education (COE) as a teacher training institute after analyzing the problems with which COE in confronted. The plans and measures are primarily to aim attracting many students with better qualities and to assist them to have teaching jobs under the current system of Examination for Teacher Appointment. This study involved multiple data sources obtained from literature review questinnaire survey, and personal contact with the faculty of COE, Questions in the questionnaire were addressed to ask the faculty´s opinions on a curriculum, a school system in university, a practicum for teacher training, a middle and a high school attached to COE, establishing an in-service teacher training institute in COE, and other measures related to the specialization of COE. The findings of the study indicated that the following suggestions should be realized if COE is to be developed and specialized ; 1. A special selection procedure should be applied to attract students with high qualities, 2. Education for the teaching of subject matters should be reinforced and a new curriculum be developed to meet the needs of COE, 3. Appropriate measures should be devised to carry out substantial teacher training for student teachers, 4. A curriculum committe should be formed and asked to work for the management of the curriculum suitable for the specialization of COE, 5. A multi-major or a minor system should be introduced across the student´s specialization fields, 6. A department needed in COE can be established as a major area under the school system in university, 7. The establishment of a middle and a high school attached to COE should be proposed to the Ministry of Education, 8. An educational research center should be established to investigate into issue related to pro-service and in-service education continually, 9. An institute for in-service teacher training and a community education center should be established to render services to the local community, and 10. A second building of COE should be constructed to be equipped with sufficient educational facilities.