• Title/Summary/Keyword: stacked

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Effect of Fiber Orientation on Failure Strength Properties of Natural Fiber Reinforced Composites including Adhesive Bonded Joint (접착제 접합된 자연섬유강화 복합재료의 파괴강도 특성에 미치는 섬유 방향의 영향)

  • Yoon, Ho-Chel
    • Journal of Welding and Joining
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    • v.24 no.5
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    • pp.43-48
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    • 2006
  • This paper is concerned with a fracture strength study of composite adhesive lap joints. The tests were carried out on specimen joints manufactured hybrid stacked composites such as the polyester and bamboo natural fiber layer. The main objective of the work was to test the fracture strength using hybrid stacked composites with a polyester and bamboo natural fiber layer. Tensile and peel strength of hybrid stacked composites are tested before appling adhesive bonding. From results, Natural fiber reinforced composites have lower tensile strength than the original polyester. and The load directional orientation and small amount and low thickness of bamboo natural fiber layer have a good effect on the tensile and peel strength of natural fiber reinforced composites. The failure strength of these materials applied adhesive bonding is also affected by fiber orientation and thickness of bamboo natural fiber layer. There for, Fiber orientation of bamboo natural fiber layer have a great effect on the tensile-shear strength of natural fiber reinforced composites including adhesive bonded joints.

Sentiment Analysis for Korean Product Review Using Stacked Bi-LSTM-CRF Model (Stacked Bi-LSTM-CRF 모델을 이용한 한국어 상품평 감성 분석)

  • Youn, Jun Young;Park, Jung Ju;Kim, Do Won;Min, Tae Hong;Lee, Jae Sung
    • Annual Conference on Human and Language Technology
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    • 2018.10a
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    • pp.633-635
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    • 2018
  • 최근 소셜 커머스 데이터를 이용하여 상품에 대한 소비자들의 수요와 선호도 등을 조사하는 등의 감성분석 연구가 활발히 진행되고 있다. 본 연구에서는 Stacked Bi-LSTM-CRF 모델을 이용하여 한국어의 복합적인 형태로 이루어지는 감성표현에 대하여 어휘단위로 감성분석을 진행하고, 상품의 세부주제(특징, 관심키워드 등)를 추출하여 세부주제별 감성 분석을 할 수 있는 방법을 제안한다.

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Failure Modes Classification and Countermeasures of Stacked IC Packages (적층 IC 패키지의 고장모드 분류와 대책)

  • Song, G.H.;Jang, J.S.
    • Journal of Applied Reliability
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    • v.16 no.4
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    • pp.347-355
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    • 2016
  • Purpose: With the advance of miniaturization of electronic products, stacked packages of high density semiconductors are commonly used. Potential failure modes and mechanisms of stacked packages are identified. Methods: Failure modes and mechanisms of thin chip stacked packages are determined through the categorization and failure analysis: delamination, non-wet, crack, ESD, EMI and the process related damages. Results: Those failure modes are not easy to find and require excessive amount time and effort for analysis and subsequent improvement. Conclusion: In this study, a method of estimating the failure rate based on the strength measurement is suggested.

Auxiliary Stacked Denoising Autoencoder based Collaborative Filtering Recommendation

  • Mu, Ruihui;Zeng, Xiaoqin
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.14 no.6
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    • pp.2310-2332
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    • 2020
  • In recent years, deep learning techniques have achieved tremendous successes in natural language processing, speech recognition and image processing. Collaborative filtering(CF) recommendation is one of widely used methods and has significant effects in implementing the new recommendation function, but it also has limitations in dealing with the problem of poor scalability, cold start and data sparsity, etc. Combining the traditional recommendation algorithm with the deep learning model has brought great opportunity for the construction of a new recommender system. In this paper, we propose a novel collaborative recommendation model based on auxiliary stacked denoising autoencoder(ASDAE), the model learns effective the preferences of users from auxiliary information. Firstly, we integrate auxiliary information with rating information. Then, we design a stacked denoising autoencoder based collaborative recommendation model to learn the preferences of users from auxiliary information and rating information. Finally, we conduct comprehensive experiments on three real datasets to compare our proposed model with state-of-the-art methods. Experimental results demonstrate that our proposed model is superior to other recommendation methods.

A Study on Dip-Moveout of Seismic Reflection Data (탄성파반자료자료의 경사보정 연구)

  • 양승진
    • Economic and Environmental Geology
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    • v.32 no.5
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    • pp.495-502
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    • 1999
  • Common-mid-point (CMP) seismic data on a dipping layer have have a stacking different from a horizontal layer velocity and the reflection points on data are dispersed to many positions. Therefore, the CMP data are not stacked well by the conventional stacking method using the horizontal layer velocity. The CMP gather can ideally stacked by applying dip-moveout(DMO) processing. Hence, modern seismic processing indludes DMO as an essential routine step. DMO processing techniques are broadly categorized by two, Fourier transform and integral methods, each of which has many different computational schemes. In this study, the dip-decomposition technique of the Fourier transform method is used to test the DMO effect on the synthetic scismic data generated for dipping structures. Each of constnat offset sections NMO corrected by using the layer velocity of the model and DMO processed. The resulting zero-offset sections for many offsets are stacked. The stacked sections with DMO processing show the structural boundaries of the models much better than those without DMO processing.

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Vibration Analysis of a Stacked beam Including Frictional Contact Force (마찰 접촉력을 고려한 다발 보(Stacked Beam)의 진동 해석)

  • 이기수;임철호
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.16 no.8
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    • pp.1513-1518
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    • 1992
  • Numerical solution technique is suggested to analyze the vibration of a spring composed of stacked beams fastened together. Bernoulli-Euler beam theory for small deflection is used, and incremental Coulomb friction law is adopted for the interface friction. The validity of the present solution technique is checked for the perfectly bonded case and the perfect sliding case.

Spatial Distribution of Localized Charge Carriers in SONOS Memory Cells

  • Kim Byung-Cheul
    • Journal of information and communication convergence engineering
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    • v.4 no.2
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    • pp.84-87
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    • 2006
  • Lateral distributions of locally injected electrons and holes in an oxide-nitride-oxide (ONO) dielectric stack of two different silicon-oxide-nitride-oxide-silicon (SONOS) memory cells are evaluated by single-junction charge pumping technique. Spatial distribution of electrons injected by channel hot electron (CHE) for programming is limited to length of the ONO region in a locally ONO stacked cell, while is spread widely along with channel in a fully ONO stacked cell. Hot-holes generated by band-to-band tunneling for erasing are trapped into the oxide as well as the ONO stack in the locally ONO stacked cell.

White OLED and Dual-plate OLED Display

  • Han, Chang-Wook;Pieh, Sung-Hoon;Sung, Chang-Jae;Kim, Hwa-Kyung;Pang, Hee-Suk;Choi, Hong-Seok;Lee, Nam-Yang;Ahn, Byung-Chul
    • 한국정보디스플레이학회:학술대회논문집
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    • 2009.10a
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    • pp.411-414
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    • 2009
  • We report single and two-stacked WOLED. Two-stacked WOLED structure adopts fluorescent blue EML and phosphorescent (red+green) EML. Current efficiency, EQE and color coordinate of two-stacked WOLED are 54.5cd/A, 28.8% and CIExy (0.322, 0.345), respectively. Those of single WOLED are also 20cd/A, 10% and CIExy (0.29, 0.37), respectively. Dual-plate OLED Display (DOD) employing the single WOLED shows high aperture ratio up to 67% in 2-inch panel of which pixel size is equivalent to that of 32 inch Full HD.

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Broadband Stacked Patch Antenna with Low VSWR and Low Cross-Polarization

  • Wang, Zhongbao;Fang, Shaojun;Fu, Shiqiang
    • ETRI Journal
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    • v.32 no.4
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    • pp.618-621
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    • 2010
  • A low cross-polarization broadband stacked patch antenna is proposed. By means of the stacked patch configuration and probe-fed strip feed technique, the VSWR 1.2:1 bandwidth of the patch antenna is enhanced to 22% from 804 MHz to 1,002 MHz, which outperforms the other available patch antennas (<10%). Furthermore, the antenna has a cross-polarization level of less than -20 dB and a gain level of about 9 dBi across the operating bandwidth. Simulation results are compared with the measurements, and a good agreement is observed.

Effects of the insulation thickness on the magnetization loss of the multi-stacked YBCO coated conductor (절연거리 변화에 따른 적층된 YBCO 도체의 자화손실 변화)

  • Lim, Hyoung-Woo;Lee, Hee-Joon;Cha, Guee-Soo;Lee, Ji-Kwang
    • Proceedings of the KIEE Conference
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    • 2005.10c
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    • pp.95-97
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    • 2005
  • Loss in the multi-stacked HTS wires are affected by a number of factor, such as, number of wires used in the stack, direction of external magnetic field and insulation thickness between the wire. This paper examines the effects of the insulation thickness on the magnetization loss of the multi-stacked YBCO coated conductor. Measurements of magnetization loss were performed using 4 different typo of multi-stacked wires and under various angle of external magnetic field. Test results show that loss density per unit volume increased for YBCO coated conductors when thickness of insulation increased. Loss density per unit volume decreased for YBCO coaled conductors when stacking number of tapes increased.

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