• Title/Summary/Keyword: Cheng Yi

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Study on economic performances of multi-span suspension bridges part 2: parametric study

  • Zhang, Li-Wen;Xiao, Ru-Cheng;Sun, Bin;Jiang, Yang;Zhang, Xue-Yi;Zhuang, Dong-Li;Zhou, Yun-Gang;Tu, Xue
    • Structural Engineering and Mechanics
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    • v.47 no.2
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    • pp.287-305
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    • 2013
  • Economic performances of consecutive multi-span suspension bridges are studied. The material amount and cost estimation formulas of the bridges have been derived in the part 1 of the study. A parametric study is carried out based on the formulas for investigating the different factors' effect on the bridge cost. The factors include the bridge sag, the bridge span, the bridge foundation and the environment condition, etc. Then, an economical layout of the bridges is proposed for different conditions. Lastly, a selection of suspension bridge types is discussed based on the economy of bridges.

Effects of deck's width-to-depth ratios and turbulent flows on the aerodynamic behaviors of long-span bridges

  • Lin, Yuh-Yi;Cheng, Chii-Ming;Lan, Chao-Yuan
    • Wind and Structures
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    • v.6 no.4
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    • pp.263-278
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    • 2003
  • This study investigates the effects of a bridge deck's width-to-depth (B/H) ratio and turbulence on buffeting response and flutter critical wind speed of long-span bridges by conducting section model tests. A streamlined box section and a plate girder section, each with four B/H ratios, were tested in smooth and turbulent flows. The results show that for the box girders, the response increases with the B/H ratio, especially in the vertical direction. For the plate girders, the vertical response also increases with the B/H ratio. However, the torsional response decreases as the B/H ratio increases. Increasing the B/H ratio and intensity of turbulence tends to improve the bridge's aerodynamic stability. Experimental results obtained from the section model tests agree reasonably with the calculated results obtained from a numerical analysis.

Evaluation of Transglutaminase from Pig Plasma on the Quality of Milk Curd

  • Tseng, Tsai-Fuh;Liu, Deng-Cheng;Chen, Ming-Tsao
    • Asian-Australasian Journal of Animal Sciences
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    • v.15 no.1
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    • pp.106-110
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    • 2002
  • The purpose of this study was to examine the effect of different levels of crude pig plasma transglutaminase (TGase) on the quality of milk curd. Different levels (0, 0.1, 0.2, 0.4, 0.8 and 1.0%) of crude pig plasma TGase was added to fresh milk, individually, and then incubated at $35^{\circ}C$. The time of milk curdling was recorded. Simultaneously, rheological properties, L value and microstructure of the samples were measured and observed. The results showed that the time of milk curdling decreased and the curd strength of milk curd increased with increasing of TGase (p<0.05). The softness of milk curd had the highest value when 0.8% TGase was added (p<0.05). However, L value of milk curds was not significantly different among all treatments. The microstructure of milk curd observed by scanning electron microscopy (SEM) became more dense with TGase level increased.

Joining of the Sinter Hardening Pully by Sinter Brazing

  • Cheng, Chao-Hsu;Lin, Yi-Ching;Lin, Yan-Cherng;Hwang, Lih-Ren
    • Proceedings of the Korean Powder Metallurgy Institute Conference
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    • 2006.09b
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    • pp.1002-1003
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    • 2006
  • This research mainly focuses on the development of sinter brazing technology for improving the process related to belt pulley made by sinter hardening. As the machine process of belt pulley takes up more than half of the total manufacturing hours, we propose changing the process to pulley groove brazed and bonded with pulley disc by applying sinter brazing to belt pulley. With the new process, the belt pulley is expected to reduce manufacturing cost to 70% of the original process by applying the sinter brazing technology; and the belt pulley bound by sinter brazing only loses 10% bonding strength compared with the original process.

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Preparation of reflexite collimating film (RCF) by ink-jet technique with organic-inorganic hybrid precursor

  • Hu, Yi;Liu, Jiun-Shing;Lyu, Jhong-Ming;Liu, Tung-Cheng
    • 한국정보디스플레이학회:학술대회논문집
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    • 2009.10a
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    • pp.1459-1461
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    • 2009
  • In this study, we prepared the multi-refraction film thin by ink-jet technique with sol-gel precursor. The precursors were prepared by using some transition metal alk-oxide and the tetraethylorthosilicate (TEOS) mixed separately with n-Butyl Alcohol and PVB (Poly(vinyl butyral)).The structure and morphology of the resulting films were investigated by atomic force microscope (AFM). It is shown that the shape of the pattern of the films would affect the refraction proportion.

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The influence of model surface roughness on wind loads of the RC chimney by comparing the full-scale measurements and wind tunnel simulations

  • Chen, Chern-Hwa;Chang, Cheng-Hsin;Lin, Yuh-Yi
    • Wind and Structures
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    • v.16 no.2
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    • pp.137-156
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    • 2013
  • A wind tunnel test of a scaled-down model and field measurement were effective methods for elucidating the aerodynamic behavior of a chimney under a wind load. Therefore, the relationship between the results of the wind tunnel test and the field measurement had to be determined. Accordingly, the set-up and testing method in the wind tunnel had to be modified from the field measurement to simulate the real behavior of a chimney under the wind flow with a larger Reynolds number. It enabled the results of the wind tunnel tests to be correlated with the field measurement. The model surface roughness and different turbulence intensity flows were added to the test. The simulated results of the wind tunnel test agreed with the full-scale measurements in the mean surface pressure distribution behavior.

A CASE STUDY OF TAIWAN'S FRAMEWORK TO EVALUATE UNSOLICITED PUBLIC/PRIVATE PARTNERSHIP PROPOSALS

  • Ying-Yi Chih;Yaw-Kuang Chen
    • International conference on construction engineering and project management
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    • 2007.03a
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    • pp.218-228
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    • 2007
  • The acceptance of unsolicited proposals (a private-initiated process) has been viewed by several governments as a means of encouraging innovative initiatives. However, the ramifications of this mechanism are still poorly understood. This paper analyzes a framework used by the Taiwanese government to evaluate unsolicited proposals. Taiwan's experience demonstrates the need for an improved framework in which key issues such as building consensus, maintaining a transparent procurement process, ensuring sufficient competition, and protecting intellectual property rights shall be addressed. In addition, the case study suggests that the roles of participants, the relationships and interfaces of activities, information flows, and decision making points should all be well defined. Some fundamental differences between solicited and unsolicited proposals are also discussed.

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USING MD CAD OBJECTS TO INTEGRATE INFORMATION FOR CONSTRUCTION PROJECTS

  • Chung-Wei Feng ;Yi-Jao Chen
    • International conference on construction engineering and project management
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    • 2005.10a
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    • pp.515-519
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    • 2005
  • Most information within a construction project roots in drawings and contract documents. Although several methodologies, such as A/E/C and 4D, have employed such a peculiarity to integrate project information, they failed to integrate information in terms of efficiency and consistency. In this research, a MD (Multi-Dimensional) CAD model is developed to improve the process of integrating information for construction projects. This research describes the processes of creating MD CAD objects and embedding information required throughout the project life cycle within MD CAD building components. In addition, a case study is presented to show the efficiency and effectiveness of using MDIIS (Multi-Dimensional Information Integration System) to integrate information for construction projects.

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A Study on Meaning of Mado(馬刀) (Terms of Surgery in Korean Medicine) (한의학(韓醫學) 외과(外科) 용어(用語) 마도(馬刀)의 의미에 관한 소고(小考))

  • Gu, Yin-Mo;Park, Chan-Young;Lee, Byung-Woo;Kim, Ki-Wook
    • Journal of Korean Medical classics
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    • v.27 no.2
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    • pp.153-162
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    • 2014
  • Objectives : We can discover 'Madohyeobyeong(馬刀挾癭)' and 'Madohyeobyeong(馬刀挾纓)' in LingShu(靈樞). But the meaning of them are not clear. Especially mean of 'Mado(馬刀)' is thoroughly confused. Someone had regarded 'Mado' as a neck region of human body, someone had regarded 'Mado' as a lump of neck region, the others had regarded that mean of 'Mado' is 'longish'. So we would like to find out clear mean of 'Maso'. Methods : We have found out examples of 'Mado' from ancient books and recent research. We have used books in the field of acupuncture, moxibustion and surgery(YangYiDaQuan(瘍醫大 全), WaiKeDaCheng(外科大成), HuangDiNeiJingLingShu(黃帝內經靈樞), ZhenJiuDaQuan(鍼灸大全), ZhenJiuDaCheng(鍼灸大成), WaiKeLiLi(外科理例), ZhenJiuWenDui(鍼灸問對), WaiKeQuanShengJi (外科 全生集), etc.). Results & Conclusions : Generally part of speech of 'Mado' is adjective. So 'Mado' plays the role of modifying shape of lump and abscess. In some cases, 'Mado' had used as abbreviation of longish shaped skin disease.