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조영광,박기숙 한국식생활문화학회 2002 韓國食生活文化學會誌 Vol.17 No.3
The history and culture of using Zhu to help take food in china is a focal question in contemporary Chinese academic circle and leads to various conflicting ideas. This article, based on original historical documents, archaeological findings, cultural relic authentication, field investigation and the author's long-term thinking, comes up with a series of new conclusions. Firstly, Zhu emerged and developed along with cooked food and granular food served in bowls; secondly, there had been a period of using single Zhu in China's history before two Zhus being used simultaneously; thirdly, the development of Zhu culture went through five historical periods, namely the former form, the interim form, the Jia form, the Zhu form and chopsticks form. In addition, the author gives out his unique viewpoints on some other relevant questions, including the Zhus which can be dated back to the Neolithic Age unearthed at Longqiuzhuang in Jiangsu province, Jiangzhai in Shanxi province etc, and the bronze utensils in the shape of Zhu unearthed in 1934 at Yin Dynasty ruins in Henan province.
A spline finite element method on mapping
Ding, Hanshan,Shao, Rongguang,Ding, Dajun Techno-Press 1996 Structural Engineering and Mechanics, An Int'l Jou Vol.4 No.4
This paper presents a newly suggested calculation method in which an arbitrary quadrilateral element with curved sides is transformed to a normal rectangular one by mapping of coordinates, then the two-dimensional spline is adopted to approach the displacement function of this element. Finally the solution can be obtained by the least-energy principle. Thereby, the application field of Spline Finite Element Method will be extended.
Chang Weon Song,Rongguang Jin,Nong Moon Hwang,Kwang Ho Kim 대한금속·재료학회 2019 ELECTRONIC MATERIALS LETTERS Vol.15 No.5
As a carbon source for hot filament chemical vapor deposition of boron-doped diamond (BDD), cost-effective acetone(C3H6O) was used instead of commonly used methane gas. In this case, tantalum filaments turned out to be more suitablethan tungsten filaments because tantalum is more oxidation-resistant and can be heated to much higher temperature withoutevaporation than tungsten. As the acetone flux was varied, the hydrogen flux was also varied so that the mixture of acetoneand hydrogen fluxes was fixed at 500 standard cubic centimeter per minute (sccm). Trimethyl borate (TMB) was used asa boron source. As the acetone flux was varied, the TMB flux was also varied so that the boron doping of 11,400 ppmwas maintained. As the flux of acetone was increased from 90 to 170 sccm, the grain size and the film thickness of BDDincreased. In this range of acetone fluxes, the films showed well-defined (111) facets, indicating that the high quality diamondwas deposited. When the acetone flux was increased to 210 sccm, the grain size decreased abruptly and the film thickness,which represents the deposition rate, decreased also. When the acetone flux was increased to 250 sccm, the grain size furtherdecreased, producing a cauliflower structure and the film thickness further decreased. The potential window, which is measuredas electrochemical properties of BDD, increased as the acetone flux increased from 90 to 170 sccm and did not changemuch between 170 and 250 sccm. From this experiment, it was confirmed that varying the flux of acetone could control themorphology, the growth rate and the electrochemical properties of the BDD film.