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A Reuse-Oriented Redesign Method of used Machine Tool based on Matter-Element Theory
Huajun Cao,Xiang Chen,Lei Xu,Enxu Ma 한국정밀공학회 2014 International Journal of Precision Engineering and Vol. No.
Aiming at the remanufacturing of used machine tool, a reuse-oriented redesign method was presented. The function tree of machinetool was established on the basis of machine tool’s characteristics of the function and structure in the method. The matter-elementmodel of sub-function was built with the matter-element theory, and then the redesign alternatives of sub-functions were made byfinding and removing the differences between the corresponding matter-element of sub-functions. The redesign alternatives of machinetool were built by combining the redesign alternatives of every sub-function together organically. For obtaining the best alternative,a comprehensive evaluation method was proposed based on the correlation function, the Analytic Hierarchy Process (AHP) and theremanufacturing knowledge of used machine tool. The evaluation method includes four indexes, such as the cost (C), the time (T),the rate of reuse (R) and the overall performance (P). Finally, this reuse-oriented redesign method was applied in one floor-typemilling & boring machine’s remanufacturing in an enterprise, and its effectiveness was verified.
( Huajun Li ),( Jya Wei Cheng ),( Hui Yuan Yu ),( Yi Xin ),( Li Tang ),( Yufang Ma ) 한국미생물 · 생명공학회 2013 Journal of microbiology and biotechnology Vol.23 No.8
Streptococcus mutans is the primary etiological agent of dental caries. The antimicrobial peptide D-Nal-Pac-525 was designed by replacing the tryptophans of the Trp-rich peptide Pac-525 with D-β-naphthyalanines. To assess the effect of D-Nal-Pac-525 on cariogenic bacteria, the activity of D-Nal-Pac-525 on the growth of S. mutans and its biofilm formation were examined. D-Nal- Pac-525 showed robust antimicrobial activity against S. mutans (minimum inhibitory concentration of 4 μg/ml). Using scanning electron microscopy and transmission electron microscopy, it was shown that D-Nal-Pac-525 caused morphological changes and damaged the cell membrane of S. mutans. D-Nal-Pac-525 inhibited biofilm formation of S. mutans at 2 μg/ml. The results of this study suggest that D-Nal-Pac-525 has great potential for clinical application as a dental caries-preventing agent.
Huajun Yuan,Dong-Hoon Shin,Bawl Kim,Cheol-Jin Lee 한국탄소학회 2011 Carbon Letters Vol.12 No.4
Well-aligned multi-walled carbon nanotubes (MWCNTs) were successfully synthesized by catalytic chemical vapor deposition using a hydrogen sulfide (H2S) additive onto Al/Fe thin film deposited on Si wafers. Transmission electron microscopy images indicated that the as-grown carbon products were thin MWCNTs with small outer diameters of less than 10 nm. H2S plays a key role in synthesizing thin MWCNTs with a large inside hollow core. The well-aligned thin MWCNTs showed a low turn-on voltage of about 1.1 V/μm at a current density of 0.1 μA/cm2 and a high emission current of about 1.0 mA/cm2 at a bias field of 2.3 V/μm. We suggest a possible growth mechanism for the well-aligned thin MWCNTs with a large inside hollow core.
Sparse Constrained Motion Synthesis Using Local Regression Models
Huajun Liu,Fuxi Zhu (사)한국CDE학회 2013 한국CAD/CAM학회 국제학술발표 논문집 Vol.2010 No.8
Based on sparse control constraints, one difficulty of synthesizing natural human motions is that low-dimensional control information can not be directly used to reconstruct high-dimensional human poses. This paper introduces a novel and powerful local dimensionality reduction approach for synthesizing accurate and natural full-body human motion using sparse control constraints. Our approach is to construct a group of online local dynamic regression models from a pre-captured motion database as a prior to support the sparse constraints for reconstructing full-body human actions. By synthesizing a variety of human motions from as possible as few sparse constraints provided by users, the paper verifies the effectiveness of the proposed approach. Compared with previous statistical models, our model can be used to synthesize more accurate human motions.
Cloning and Characterization of 6-Phosphogluconolactonase Gene in Silkworm Bombyx mori
Yang, HuaJun,Chen, KePing,Yao, Qin,Guo, ZhongJian Korean Society of Sericultural Science 2007 International Journal of Industrial Entomology Vol.14 No.2
As the genome of B. mori is available in GenBank and the EST database of B. mori is expanding, identification of novel genes of B. mori was conceivable by datamining techniques and bioinformatics tools. In this study, we used the in silico cloning method to get the 6-Phosphogluconolactonase (6PGL) gene of B. mori and analysed with bioinformatics tools. The result was confirmed by RT-PCR and prokaryotic expression. The 6PGL cDNA comtains a 702 bp ORF. The deduced protein has 233 amino acid residues, with the predicted molecular weight of 25946. 72 Da, isoelectric point of 5.41, and contains conserved NagB domains. This gene has been registered in GenBank under the accession number EF198104.
중국 국유기업 지배구조를 통한 사회적 책임 수행의 입법경험
( Wu-huajun ),( Nan-xuemei ) 연세법학회 2023 연세법학 Vol.41 No.-
기업 사회적 책임의 입법규정은 경제발전 방식에 부합하여야 할 뿐만 아니라 지배구조에 의하여 현실화 될 수 있다. 중국 회사법 개정안에서 기업 사회적 책임에 대한 규정을 살펴보면, 기존의 합법적 경영 이념을 강조하는 사회적 책임 규정으로부터 점차적으로 사회이익과 환경이익 및 근로자 이익을 함께 추구하는 사회적 책임의 입법 규정으로 전환되었다. 본 문은 중국의 경제에서 국유기 업발전이 차지하는 특수성을 감안하여, 현재 중국에서 일어나고 있는 국유기업의 지배구조를 통한 기업 사회적 책임을 부각하려는 입법적인 움직임을 토대로, 기업 사회적 책임에 대한 지배구조 차원의 입법 경험과 중국 회사법 개정안의 내용을 살펴보았다. The content of corporate social responsibility must not only conform to the mode of economic development, but also can be realized by the corporate governance structure. Looking at the provisions on social responsibility in the revision of China's company law, the existing social responsibility provisions that emphasize legal management ideology are gradually revised to the corporate social responsibility provisions that pursue the interests of society, environment, and worker. Considering the peculiarity of China enterprises’ development in China’s economy, this paper examined the contents of corporate social responsibility in the revision of China’s company law on the basis of the legislative initiatives that highlight corporate social responsibility through the governance structure of state-owned companies in China.
저전력 비동기식 시스템 설계를 위한 혼합형 dual-rail data encoding 방식 제안 및 검증
지화준(Huajun Chi),김상만(Sangman Kim),박주성(Jusung Park) 대한전자공학회 2014 전자공학회논문지 Vol.51 No.7
본 논문에서는 dual-rail data encoding방식을 적용하여 비동기식시스템을 설계할 때, 신호천이를 줄이고 소비전력을 줄이기위하여 4-phase handshaking 프로토콜과 2-phase handshaking 프로토콜을 혼합한 dual-rail data encoding방식을 제안한다. 기존의 dual-rail data encoding 4-phase handshaking 프로토콜은 space state가 존재함으로 말미암아 신호 천이가 많이 발생하게 되고 많은 전력소비를 발생한다. 이론적으로 dual-rail data encoding 2-phase handshaking 프로토콜은 dual-rail data encoding 4-phase handshaking 프로토콜보다 빠르고 신호천이도 적지만 표준 라이브러리를 사용하여 설계할 수 없다. 제안하는 혼합형 dual-rail data encoding 방식의 성능을 평가하기 위하여 Adder블록, Multiplier블록, Latch를 포함한 benchmark회로를 설계를 설계하였다. Benchmark회로를 이용하여 시뮬레이션해본 결과, 제안하는 혼합형 dual-rail data encoding방식은 기존의 dual-rail data encoding 4-phase handshaking 프로토콜에 비해 35%이상 전력소비가 감소되는 결과를 얻었다. In this paper, we proposed new dual-rail data encoding that mixed 4-phase handshaking protocol and 2-phase handshaking protocol for asynchronous system design to reduce signal activities and power consumption. The dual-rail data encoding 4-phase handshaking protocol should leat to much signal activities and power consumption by return to space state. Ideally, the dual-rail data encoding 2-phase handshaking protocol should lead to faster circuits and lower power consumption than the dual-rail 4-phase handshaking protocol, but can not designed using standard library. We use a benchmark circuit that contains a multiplier block, an adder block, and latches to evaluate the proposed dual-rail data encoding. The benchmark circuit using the proposed dual-rail data encoding shows an over 35% reduction in power consumption with 4-phase dual-rail data encoding.
Liu, Huajun,Dong, Yongqi,Cherukara, Mathew J.,Sasikumar, Kiran,Narayanan, Badri,Cai, Zhonghou,Lai, Barry,Stan, Liliana,Hong, Seungbum,Chan, Maria K. Y.,Sankaranarayanan, Subramanian K. R. S.,Zhou, Hua American Chemical Society 2018 ACS NANO Vol.12 No.5
<P>Memristive devices are an emerging technology that enables both rich interdisciplinary science and novel device functionalities, such as nonvolatile memories and nanoionics-based synaptic electronics. Recent work has shown that the reproducibility and variability of the devices depend sensitively on the defect structures created during electroforming as well as their continued evolution under dynamic electric fields. However, a fundamental principle guiding the material design of defect structures is still lacking due to the difficulty in understanding dynamic defect behavior under different resistance states. Here, we unravel the existence of threshold behavior by studying model, single-crystal devices: resistive switching requires that the pristine oxygen vacancy concentration reside near a critical value. Theoretical calculations show that the threshold oxygen vacancy concentration lies at the boundary for both electronic and atomic phase transitions. Through <I>operando</I>, multimodal X-ray imaging, we show that field tuning of the local oxygen vacancy concentration below or above the threshold value is responsible for switching between different electrical states. These results provide a general strategy for designing functional defect structures around threshold concentrations to create dynamic, field-controlled phases for memristive devices.</P> [FIG OMISSION]</BR>