• 동력기계공학회지
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• 제8권2호
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• pp.31-38
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• 2004

The main purpose of this study is to investigate the characteristics of hybrid collection system combined with centrifugal force of cyclone and filtration of bag filter in one unit system. The experiment and numerical simulation are executed for the analysis of collection efficiency and pressure drop characteristics of hybrid system in comparison with those of a general fabric bag filter with the various experimental parameters such as inlet velocity(filtration velocity), dust concentration and dust type, etc.. In present system, dust particles tangentially coming into the system body are controlled by the centrifugal force effect, and the next collection is made out by the filtration mechanism in the fabric filter media. Therefore, the effective first collection causes the decrease of dust loading on the fabric filter, and it presents quite a lower pressure drop of fabric filter than that of a general fabric filter. At the inlet velocity, $21{\sim}27m/sec$ and inlet concentration(fly ash) $300mg/m^3$, pressure drops through the filter media of hybrid system are shown lower as $10{\sim}22mmH_2O$ comparing to those($17{\sim}33mmH_2O$) of a general fabric bag filter.

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2008년도 추계학술대회 논문집
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• pp.203-204
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• 2008

• 한국입자에어로졸학회지
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• 제12권4호
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• pp.115-126
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• 2016

Numerical analysis was done to evaluate the movement of the particles and the fluid inside of the cyclone-bag hybrid dust collector. Flow discharged from the cyclone in the hybrid particle collector has swirl pattern, and it results in the biased flow to the bag filters and deteriorates the collection performance of the bag filter. The current study is to evaluate the effect of the duct lengths and the baffle arrays in the connection duct by the computational methods. Main concerns of the analysis are how to improve the uniformity of the internal flow between the cyclone and the bag filter. Numerical analysis was done to check the particle removal efficiencies of the system with respect to the flow characteristics which is expressed in RMS values of the upward flow inside of the connection duct. The flow pattern inside of the connection duct is evaluated under different the duct lengths and the baffle arrays. In case of the reference geometry the RMS value of inside flow was 56.7%, and the value was decreased to 30.1% by controlling the lengths of duct. The effects of baffle was also evaluated, the RMS value of flow could be decreased 55.2% and so on. But the pressure drop across the baffles becomes high and the system efficiency becomes lower.

• 한국의상디자인학회지
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• 제23권2호
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• pp.29-42
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• 2021

This study is about the development of hybrid bag designs using folk paintings and the paintings of Pieter Brueghel. For the development of design, the study examined the periodical, ideological background, aesthetic characteristics, composition and themes of folk paintings, and Brueghel's paintings. Through a literature review, many similarities were found between folk paintings and Brueghel's paintings, such as symbolism and humor, which are aesthetic characteristics of folk paintings, and the use of stories, myths, folktales, or satire with a background of nature. In addition, hybrid fashions made by mixing conflicting elements, such as East and West, men and women, and rich and poor are attracting attention. However, the development of hybrid fashion designs of Korean folk paintings and Western paintings are rare. So, folktale characters were produced on Korean folktales. The deer expressed in the Bible Agatha, the tiger in from a Korean folktale, magpies are symbols of longevity. The folk painting characters described above, and the folk paintings of Peter Bruegel were fused and reconstructed. The bag designs were developed based on this fused and reconstructed work. The significance of this study is to expand folk paintings that reflect Korea's representative thoughts and lifestyles through the fusion of various motifs and Western paintings, and to present folk paintings as a medium that can inherit Korean beauty and inform the world.

• 공업화학
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• 제20권5호
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• pp.547-552
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• 2009

본 연구에서는 fiber reinforced plastics (FRP) 제품 가공시 발생하는 분진 및 악취 물질로 인한 작업현장의 악조건을 개선하기 위하여 activated carbon fiber (ACF) 장착 하이브리드 백필터를 개발하였다. FRP 제조업체 2개사에 ACF 백필터를 설치함에 있어 천장, 벽하단 부분에 덕트를 설치함은 물론 이동식 집진 덕트를 설치함으로써 집진효율을 높였다. 펄스젯트식 탈진방식을 채택하여 효과적인 시스템 운영을 유도함으로써 작업환경을 개선하고자 하였다. 하이브리드 백필터 시스템 운용시 이에 따르는 분진과 악취에 대한 제거동향을 고찰하였다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제14권4호
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• pp.1400-1418
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• 2020

In the development of commercial promotion, chatbot is known as one of significant skill by application of natural language processing (NLP). Conventional design methods are using bag-of-words model (BOW) alone based on Google database and other online corpus. For one thing, in the bag-of-words model, the vectors are Irrelevant to one another. Even though this method is friendly to discrete features, it is not conducive to the machine to understand continuous statements due to the loss of the connection between words in the encoded word vector. For other thing, existing methods are used to test in state-of-the-art online corpus but it is hard to apply in real applications such as telemarketing data. In this paper, we propose an improved chatbot design way using hybrid bag-of-words model and skip-gram model based on the real telemarketing data. Specifically, we first collect the real data in the telemarketing field and perform data cleaning and data classification on the constructed corpus. Second, the word representation is adopted hybrid bag-of-words model and skip-gram model. The skip-gram model maps synonyms in the vicinity of vector space. The correlation between words is expressed, so the amount of information contained in the word vector is increased, making up for the shortcomings caused by using bag-of-words model alone. Third, we use the term frequency-inverse document frequency (TF-IDF) weighting method to improve the weight of key words, then output the final word expression. At last, the answer is produced using hybrid retrieval model and generate model. The retrieval model can accurately answer questions in the field. The generate model can supplement the question of answering the open domain, in which the answer to the final reply is completed by long-short term memory (LSTM) training and prediction. Experimental results show which the hybrid word vector expression model can improve the accuracy of the response and the whole system can communicate with humans.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권7호
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• pp.2952-2971
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• 2016

Outsourcing jobs to a public cloud is a cost-effective way to address the problem of satisfying the peak resource demand when the local cloud has insufficient resources. In this paper, we studied the management of deadline-constrained bag-of-tasks jobs on hybrid clouds. We presented a binary nonlinear programming (BNP) problem to model the hybrid cloud management which minimizes rent cost from the public cloud while completes the jobs within their respective deadlines. To solve this BNP problem in polynomial time, we proposed a heuristic algorithm. The main idea is assigning the task closest to its deadline to current core until the core cannot finish any task within its deadline. When there is no available core, the algorithm adds an available physical machine (PM) with most capacity or rents a new virtual machine (VM) with highest cost-performance ratio. As there may be a workload imbalance between/among cores on a PM/VM after task assigning, we propose a task reassigning algorithm to balance them. Extensive experimental results show that our heuristic algorithm saves 16.2%-76% rent cost and improves 47.3%-182.8% resource utilizations satisfying deadline constraints, compared with first fit decreasing algorithm, and that our task reassigning algorithm improves the makespan of tasks up to 47.6%.

• 공업화학
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• 제20권2호
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• pp.218-222
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• 2009

국 내외 관련기술현황에서 파악한 바와 같이, 종래의 악취 및 먼지제거 기술은 처리방법이나 경제성 면에 있어서 만족스럽지 못한 측면이 있고, 먼지와 악취가 동시에 발생하는 작업장의 경우 이 두 시설을 별도로 설치해야 하는 것이 큰 문제점이었다. 기존의 Bag Filter와 ACF (활성탄섬유)의 이중필터 형식인, ACF장착 Bag Filter를 적용하여 하나의 시설로 분진 및 악취 동시제거용 복합 Bag Filter 시스템을 개발을 위한 기초자료를 검토하였다.

• 한국컴퓨터그래픽스학회논문지
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• 제18권4호
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• pp.17-23
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• 2012

IT를 접목한 스포츠 의류, M-드레스(Mobile Phone Dress), 웨어러블 컴퓨팅(Wearable Computing) 등 패션이 IT와 결합하면서 활발한 움직임을 보이고 있다. 하지만 지속적인 연구를 통하여 많은 발전을 이루고 있음에도 불구하고 패션에 사용된 IT 기술의 활용은 전원, 착용감, 세탁, 휴대성 등이 문제점으로 나타나고 있다. 따라서 본 논문에서는 착용가능 기술이 효과적으로 가방에 적용되어 개발된 제품을 제시한다. 사람의 감성을 극대화할 수 있는 레저 및 여행을 위한 패밀리 룩(Family Look) 성격의 가방과 20~30대 여성들의 감성을 디자인으로 자극할 수 있는 오띠 꾸뜨르(Haute Couture) 패션에 맞는 싱글 리미티드 가방 그리고 가족이 대상이 되는 패밀리 가방을 토대로 착용가능기술이 적용된 제품디자인을 제작하여 제시하며, 이로 말미암아 앞으로 변화될 패션의 변화를 제안한다.

• 교육녹색환경연구
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• 제9권3호
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• pp.34-40
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• 2010

In this study, vibration characteristics of reinforced concrete slab in large span educational facilities were evaluated. A 21.75m X 14.4m full scale reinforced concrete slab specimen was constructed with pre-flex hybrid beams. Vibrations were generated by three different methods such as free falling method of a 6kg sand bag, a 70kg person walking method and impact method by impulse hammer. Vibrations were generated more than 3 times at single location. Vibration characteristic data were collected by SA390 signal analyzer machine at 5 different locations.