Hybrid Evaluation Method for Dispatching Control Level of Smart Distribution Network

Yu‑Qian Wang,Leijiao Ge,Na Zhang 대한전기학회 2019 Journal of Electrical Engineering & Technology Vol.14 No.6

Smart distribution network (SDN) is an important part of smart grid (SG), and its dispatching control level is closely related to the safety and reliability of power system. In order to comprehensively and systematically evaluate the dispatching and control level of smart distribution network, this paper constructs an evaluation index system based on the considerations of reliability, economy, efectiveness, adaptability and cleanness. Taking into account the disadvantages of subjective weighting methods and the objective weighting methods, this paper puts forward a kind of subjective and objective mixed evaluation method for dispatching control level of SDN. In view of the great infuence of expert opinions of subjective weighting method and the high data dependence of objective weighting method, the binomial coefcient method of subjective weighting is combined with the multi-objective programming method of objective weighting to give weight to each index in the comprehensive evaluation index system of dispatching control level of SDN. Case studies verify the proposed method has great signifcance to the evaluation of the dispatching control level of SDN. It can efectively evaluate the dispatching level of SDN and provide a reference for the improvement of the dispatching control level of SDN.

Two New Species of Placolecis (Lichenized Ascomycota) from China

( An Cheng Yin ),( Xin Yu Wang ),( Dong Liu ),( Yan Yun Zhang ),( Mei Xia Yang ),( Li Juan Li ),( Li Song Wang ) 한국균학회 2019 Mycobiology Vol.47 No.4

Two new species of the lichen genus Placolecis are discovered in China, namely P. kunmingensis An. C. Yin & Li S. Wang and P. sublaevis An. C. Yin & Li S. Wang. The new combination P. loekoesiana (S.Y. Kondr., Farkas, J.J. Woo & Hur) An. C. Yin is proposed. Placolecis kunmingensis is characterized by having simple, spherical or ellipsoid, hyaline spores, and pear-shaped pycnidia; while P. sublaevis can be distinguished by its thallus forming larger aggregations with slightly flattened lobes at the thallus margin, and urn-shaped pycnidia. Descriptions, a phylogenetic tree and a key are provided for all the known Placolecis species in China.

Inhibition of Microcystis aeruginosa by the Extracellular Substances from an Aeromonas sp

( Yu Mei Liu ),( Ming Jun Chen ),( Meng Hui Wang1 ),( Rui Bao Jia ),( Li Li ) 한국미생물 · 생명공학회 2013 Journal of microbiology and biotechnology Vol.23 No.9

Growth of Microcystis aeruginosa could be inhibited significantly within 24 h by the extracellular substances prepared from Aeromonas sp. strain FM. During the treatment, the concentration of extracellular soluble carbohydrates increased significantly in algal culture. Morphological and ultrastructural changes in M. aeruginosa cells, including breakage of the cell surface, secretion of mucilage, and intracellular disorganization of thylakoids, were observed. HPLC-MS analysis showed that the extracellular substances of Aeromonas sp. strain FM were a mixture of free amino acids, tripeptides, and clavulanate. Among these, the algaelysis effects of lysine and clavulanate were confirmed.

近 100年來의 甲骨學 연구

王宇信 연세대학교 인문과학연구소 1996 人文科學 Vol.75 No.-

M2M-MIB를 이용한 분산구조 CNM

이유경,김장형,송왕철 濟州大學校 工科大學 産業技術硏究所 1997 尖端技術硏究所論文集 Vol.8 No.2

Recently, Virtual Private Network(VPN) services are widely used to establish enterprise networks. The enterprise networks may be distributed locally and have been used to be in the form of leased lines of the public networks. However. VPN provides more efficient ways of establishing enterprise networks than ever. VPN services are provided depending upon contracts between the VPN provider and the customer, and the tariff can be asked only on the basis of usage. In addition. to meet various demands of customer, the VPN provider supplies the management information and supports the limited managing rights for the related public network resources. The coustomers be able to manage their own VPNs. Nowadays, trends toward implementing asynchronous transfer mode (ATM) technologies for public and/or private networks have been increasing and CNM has been also considered in the ATM network environment. ATM Forum provides M3 Specifications for the CNM, but VPN services across the several public networks are not considered. Therefore, in this paper, a distributed architecture of CNM using M2M-MIB is proposed and implemented using the UT-SNMP, package of University of Twente.

M2M-MIB를 이용한 분산구조 CNM

이유경,김장형,송왕철 濟州大學校 産業技術硏究所 1997 산업기술연구소논문집 Vol.8 No.2

Recently, Virtual Private Network(VPN) services are Lvidely used to establish enterprise networks. The enterprise networks may be distributed locally and have been used to be in the form of leased lines of the public networks. However. VPN provides more efficient ways of establishing enterprise networks than ever. VPN services are provided depending upon contracts betlveen the VPN provider and the customer. and the tariff can be asked only on the basis of usage. In addition, to meet various demands of customer. the VPN provider supplies the management information and supports the limited managing rights for the related public network resources. The customers be able to manage their own VPNs. Nowadays. trends toward implementing asynchronous transfer mode (ATM) technologies for public and/or private netLvorks have been increasing and CNM has been also considered in the ATN network environment, ATM Forum provides M3 Specifications for the CNM. but VPN services across the seireral public networks are not considered. Therefore. in this paper, a distributed architecture of CNM using M2M-MIB is proposed and implemented using the UT-SNMP. package of University lof Twente.

학령전기 아동의 글씨 쓰기에 영향을 미치는 요인에 관한 연구

김원진,왕군철,김두리,최인영,허진아,최유정,장문영 대한감각통합치료학회 2011 대한감각통합치료학회지 Vol.9 No.1

목적 : 학령전기 아동의 글씨 쓰기 명료도 및 속도와 지각-운동 기술의 상관관계를 확인하고, 글씨 쓰기에 가장 영 향을 주는 요인을 알아보고자 하였다. 연구방법 : 덴버 발달 선별 검사를 통하여 정상 발달로 선별된 23명의 학령 전기 아동(평균 연령=68.61개월, SD=2.04)을 대상으로 글씨 쓰기 명료도 및 속도 측정을 위하여 한글 자모 쓰기 검사지를 사용하여 자음과 모음을 쓰도록 하였다. 시지각과 시각-운동 통합 수행 능력 측정을 위하여 시지각 발달 검사를 사용하였고, 소운동 협응 수행 능력 측정을 위하여 Grooved pegboard test를 사용하였다. 결과 : 글씨 쓰기 명료도와 전반적인 시지각, 비운동성 시지각, 시각-운동 통합, 우세손 소동작 협응의 상관관계는 없었으며, 글씨 쓰기의 속도는 전반적 시지각과 우세손 소동작 협응 항목에서 유의한 상관관계를 보였다. 회귀 분 석 결과 글씨 쓰기 속도에 가장 큰 영향을 주는 요인은 전반적 시지각 항목이었다. 결론 : 만 5~6세 학령 전기 아동의 전반적 시지각 능력의 발달을 향상시키기 위한 중재를 제공하는 것이 글씨 쓰기 의 속도 능력을 향상 시킬 수 있다는 것을 알 수 있다. Objective : This study investigated the relationships of handwriting legibility and perceptual-motor skills, and handwriting speed and perceptual-motor skills. And identified the predictors that most affect the handwriting of preschool children. Methods : Twenty-three typically developing preschool aged children (mean age: 68.61 months, SD=2.04) were selected through the Korean-Denver Developmental Screening Test-2(K-DDST-2). The children were tested with regard to handwriting legibility, visual perception, visual-motor integration and fine-motor coordination. Results : First, a significant relationship was not found among handwriting legibility, visual perception, visualmotor integration and fine-motor coordination. Second, a significant relationship was found among handwriting speed, visual perception and fine-motor coordination. Third, stepwise multiple regression analyses showed that general visual perception were significant predictors for handwriting speed. Conclusion : Occupational therapists should evaluate children's visual perception levels utilizing a standardized test, and focus on general visual perception in order to improve handwriting skill(speed). Also, occupational therapists are expected to play an important role in the management and treatment of children's handwriting skills.

Favorable Impact Toughness of High Heat Input Coarse-Grained HAZ in an Ultra-Low Carbon High-Strength Microalloyed Steel

Fuhui Cui,Junjie Wang1,Xiangdong Gan,Dawei Yu,Ilya Vladimirovich Okulov,Qinghua Tian,Xueyi Guo 대한금속ᆞ재료학회 2023 METALS AND MATERIALS International Vol.29 No.2

Liquid Mg is capable of quickly eroding the refractory Ni-based superalloy and selectively dissolve Ni, which opens up anew avenue for the recycling of superalloy scraps for comprehensive metal reclamation. This study aims at investigating theunderlining mechanism and kinetics of the selective dissolution of Ni from Inconel 718 (one type of Ni-based superalloy)with liquid Mg, by experimenting at 750, 800, and 850 °C for various amounts of time in an inert atmosphere. This selectivedissolution process is also known as liquid metal dealloying. Results show that a permeable dealloyed layer was formedresulting from the preferential dissolution of Ni over other metallic elements (e.g., Fe, Cr, Nb, Mo, and Ti). At the dealloyingforefront, the grain boundaries of the matrix γ phase were preferentially eroded by liquid Mg. The opposite concentrationgradients of Ni (4–9 wt%) and Mg (12–18 wt%) cross the dealloyed layer suggested their counter diffusion. A higher heatingtemperature substantially increased the dealloying rate.

양지면 전원주택단지 프로젝트 계획

김신원,정유홍,노희곤,도의성,최기왕 경희대학교 디자인연구원 2006 예술· 디자인학연구 Vol.9 No.2

This plan of rural housing-development is to present a new orientation for the residential culture that can meet the shifting demands of modern people as their attitudes toward naturalistic life. In this plan, sites of possible, a new housing complex is designed to supplement the site partition problem of existing housing complex by using attractiveness that the site has as a residence environment in housing planning. The conclusion can be summarized as follows. 1. Currently, most residential developments on slopes are planned with excessive slope cutting or filling on existing natural slopes rather than utilizing existing contours. In consideration of this, this proposed plan uses the existing contours of the slope to the maximum capacity in site planning. 2. The majority of the home site buyers are between the ages 30's to 50's of middle to high level incomes. Reflecting the financial needs of these families, home construction was planned by using building methods that require lower costs. 3. Reflected open-space furtherance maximum at design of community equipment for party's offer to sale in lots persons, from site purchase recognition of construction to in package sale in lots way select. 4. Considered to preserve existing natural-food life in way financial world stroke maximum, and accomplish creation with existing vegetation. Also, did planting considering privacy, and considered vegetation's environment adaptation degree because using midland style vegetation. 5. Garden wished to offer an opportunity that can make by oneself directly depending on each fondness and character to tenants. If is this intuition, wished to design, and maintained spur of housing development because housing development uses maximum natural history style comparing with other power jars all. Also, because considering people who move in housing-development, designed, and tried to make housing-development that want to live most offering the convenience.

A novel design method for improving collapse resistances of multi-story steel frames with unequal spans using steel braces

Zheng Tan,Wei-hui Zhong,Bao Meng,Shi-chao Duan,Hong-chen Wang3,Xing-You Yao,Yu-hui Zheng 국제구조공학회 2023 Steel and Composite Structures, An International J Vol.47 No.2

The bearing capacities resisted by the two-bay beams of multi-story planar frames with unequal spans under column removal scenarios differ considerably owing to the asymmetric stress on the left and right beams connected to the failed column and cause the potential for beams with larger span-to-depth ratios to be unable to exert effectively, which is disadvantageous for resisting the vertical load in unequal-span frame structures. To address this problem, the structural measure of adding braces to the weak bays of multi-story unequal-span frames was proposed, with the objective of achieving a coordinated stress state in two-bay beams with unequal spans, thereby improving the collapse resistance of unequal-span frame structures. Before conducting the numerical simulation, the modeling methods were verified by previous experimental results of two multi-story planar frames with and without steel braces. Thereafter, the effects of the tensile and compressive braces on the collapse behavior of the frame structures were elucidated. Then, based on the mechanical action laws of the braces throughout the collapse process, a detailed design method for improving the collapse resistance of unequal-span frame structures was proposed. Finally, the proposed design method was verified by using sufficient example models, and the results demonstrated that the design method has good application prospects and high practical value.