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Effects of Ga-doping on the microstructure and magnetic properties of MnBi alloys
Yang, Yang,Kim, Jong-Woo,Si, Ping-Zhan,Qian, Hui-Dong,Shin, Yongho,Wang, Xinyou,Park, Jihoon,Li, Oi Lun,Wu, Qiong,Ge, Hongliang,Choi, Chul-Jin Elsevier 2018 JOURNAL OF ALLOYS AND COMPOUNDS Vol.769 No.-
<P><B>Abstract</B></P> <P>The low temperature phase Mn<SUB>55</SUB>Bi<SUB>45-<I>x</I> </SUB>Ga<SUB> <I>x</I> </SUB> (<I>x</I> = 0, 1, 3, 5, and 10) alloys were prepared by induction melting process with subsequent low temperature annealing. The effects of Ga-doping on the crystal structure and magnetic properties of the alloys were systematically studied. The room temperature coercivities of Mn<SUB>55</SUB>Bi<SUB>45-<I>x</I> </SUB>Ga<SUB> <I>x</I> </SUB> after ball milling increased from 1.43 T for <I>x</I> = 0 to 1.66 T for <I>x</I> = 5, while the saturation magnetization decreased from 60.7 Am<SUP>2</SUP>/kg (<I>x</I> = 0) to 45.1 Am<SUP>2</SUP>/kg (<I>x</I> = 5). The maximum energy product (<I>BH</I>)<SUB>max</SUB> of Mn<SUB>55</SUB>Bi<SUB>44</SUB>Ga powders reached 7.87 MGOe. The Curie temperature of the Mn<SUB>55</SUB>Bi<SUB>45-<I>x</I> </SUB>Ga<SUB> <I>x</I> </SUB> alloys increased from 633 K to 658 K with increasing Ga concentration in the range of 0 ≤ <I>x</I> ≤ 5.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Effects of doping Ga on the microstructural and magnetic properties of MnBi alloy. </LI> <LI> The MnBi-Ga powders are achieved by surfactant assisted high energy ball milling. </LI> <LI> The maximum energy produce (<I>BH</I>)<SUB>max</SUB> shows 7.87 MGOe for Mn<SUB>55</SUB>Bi<SUB>44</SUB>Ga sample. </LI> <LI> The coercivity of Mn<SUB>55</SUB>Bi<SUB>40</SUB>Ga<SUB>5</SUB> after ball milling reached 1.66 T at room temperature. </LI> <LI> The elevated curie temperature (<I>T</I> <SUB>c</SUB>) by doping Ga makes it a possible candidate for high temperature applications. </LI> </UL> </P>
Yang, Hai Qiong(양해경),Hong, Chan Seok(홍찬석) 한국전시산업융합연구원 2021 한국과학예술융합학회 Vol.39 No.3
With the outbreak of COVID-19, international exchanges have become more frequent, and cross-cultural exchanges have also begun to become more frequent, prompting the internationalization and cross-cultural features of design to become increasingly prominent. This article starts with this exploration of design trends and analyzes the design activities in the Guangdong-Hong Kong-Macao Greater Bay Area. The purpose of this research is to design a theoretical system of innovation methods in the process of cross-cultural knowledge fusion of consistency modeling, similarity clustering, reorganization, and fusion innovation. Therefore, this thesis was able to study the components of innovative design methods. First, using design cases, cross-cultural knowledge fusion procedures and design trends, an analysis framework is designed. Secondly, under this framework, four design categories are studied: visual design, industrial design, fashion design, and space design. Finally, it is analyzed that innovative design has different degrees of development in regions, ecology, technology, times and human nature. Based on these research results, we look forward to enhancing consumers" personalized experience of the product.
Yang, Hai Qiong(양해경),Hong, Chan Seok(홍찬석) 한국전시산업융합연구원 2021 한국과학예술융합학회 Vol.39 No.5
Due to the rapid development of network media and the popularity of mobile social media, the form of fused media development has been vigorously developed. The new “short-time” video format for real-time sharing and seamless docking on short video social platforms meets people’s need for relaxation of “fragmented” time. Based on the characteristics of the TikTok, this article analyzes the overseas communication strategies of Guangdong culture short videos from influencing factors and case studies. The purpose of this article is to establish an overseas communication strategy based on the ELM. Therefore, this article can study the factors that affect the effect of overseas communication through SPSS analysis. First, using the ELM, four model hypotheses are proposed under the center path and the edge path. Second, through designing questionnaires and data collection, SPSS data analysis shows that the H1, H2, and H3 hypotheses are established, and three main factors affecting overseas communication are explored: high-quality content, user attitudes-participation, and media popularity. H4 hypothesis does not hold, delete the creators. Third, through case studies, analyze the specific advantages of overseas communication. Finally, propose some strategies. Based on these research results, we look forward to the combination of Guangdong culture and commercial products to enhance the influence of overseas communication.
( Jing Liu ),( Guilian Yang ),( Xing Gao ),( Zan Zhang ),( Yang Liu ),( Xin Yang ),( Chunwei Shi ),( Qiong Liu ),( Yanlong Jiang ),( Chunfeng Wang ) 한국미생물 · 생명공학회 2019 Journal of microbiology and biotechnology Vol.29 No.1
The lactic acid bacteria species Lactobacillus plantarum (L. plantarum) has been used extensively for vaccine delivery. Considering to the critical role of dendritic cells in stimulating host immune response, in this study, we constructed a novel CD11c-targeting L. plantarum strain with surface-displayed variable fragments of anti-CD11c, single-chain antibody (scFv-CD11c). The newly designed L. plantarum strain, named 409-aCD11c, could adhere and invade more efficiently to bone marrow-derived DCs (BMDCs) in vitro due to the specific interaction between scFv-CD11c and CD11c located on the surface of BMDCs. After incubation with BMDCs, the 409-aCD11c strain harboring a eukaryotic vector pValac-GFP could lead to more efficient expression of GFP compared with wild-type strains shown by flow cytometry analysis, indicating the enhanced translocation of pValac-GFP from L. plantarum to BMDCs. Similar results were also observed in an in vivo study, which showed that oral administration resulted in efficient expression of GFP in both Peyer’s patches (PP) and mesenteric lymph nodes (MLNs) within 7 days after the last administration. In addition, the CD11c-targeting strain significantly promoted the differentiation and maturation of DCs, the differentiation of IL-4+ and IL-17A+ T helper (Th) cells in MLNs, as well as production of B220+ IgA+ B cells in the PP. In conclusion, this study developed a novel DC-targeting L. plantarum strain which could increase the ability to deliver eukaryotic expression plasmid to host cells, indicating a promising approach for vaccine study.
Voice Activity Detection Algorithm based on Improved Radial Basis Function Neural Network
Bao-yuan Chen,Ya-qiong Lan,Jing-yang Liu,Zi-he Li,Xiao-yang Yu 보안공학연구지원센터 2014 International Journal of Signal Processing, Image Vol.7 No.5
Voice activity detection (VAD) is the key of voice recognition, voice synthesis and speech-sound enhancement.For the sake of improve the accuracy and robustness of speech endpoint detection system. Combining the advantages of adaptive genetic algorithm (AGA) and improved radial basis function network (RBF) defects in existing learning methods. This paper presents a comprehensive detection method-- Adaptive genetic algorithm radial basis function network. This method uses adaptive genetic algorithm to simultaneously optimize the center, the width and the structure of RBF network. The method using wavelet analysis to extract the characteristics of the speech signal, use them as an input amount to the radial basis function networks. Establish voice detection system model, this method enhance the accuracy of the detection system and has better robustness.
Bone Morphogenetic Protein 9 Overexpression Reduces Osteosarcoma Cell Migration and Invasion
Zilan Lv,Ya-guang Weng,Dandan Yang,Jie Li,Min Hu,Min Luo,Xiaoqin Zhan,Peipei Song,Chen Liu,Huili Bai,Baolin Li,Yang Yang,Yingying Chen,Qiong Shi 한국분자세포생물학회 2013 Molecules and cells Vol.36 No.2
Transforming growth factor- (TGF-) is known to pro-mote tumor migration and invasion. Bone morphogenetic proteins (BMPs) are members of the TGF- family expressed in a variety of human carcinoma cell lines. The role of bone morphogenetic protein 9 (BMP9), the most powerful osteogenic factor, in osteosarcoma (OS) progression has not been fully clarified. The expression of BMP9 and its receptors in OS cell lines was analyzed by RT-PCR. We found that BMP9 and its receptors were expressed in OS cell lines. We further investigated the influence of BMP9 on the biological behaviors of OS cells. BMP9 overexpression in the OS cell lines 143B and MG63 inhibited in vitro cell migration and invasion. We further investigated the ex-pression of a panel of cancer-related genes and found that BMP9 overexpression increased the phosphorylation of Smad1/5/8 proteins, increased the expression of ID1, and reduced the expression and activity of matrix metalloproteinase 9 (MMP9) in OS cells. BMP9 silencing induced the opposite effects. We also found that BMP9 may not affect the chemokine (C-X-C motif) ligand 12 (CXCL12)/C-X-C chemokine receptor type 4 (CXCR4) axis to regulate the invasiveness and metastatic capacity of OS cells. Interestingly, CXCR4 was expressed in both 143B and MG63 cells, while CXCL12 was only detected in MG63 cells. Taken together, we hypothesize that BMP9 inhibits the migration and invasiveness of OS cells through a Smad-dependent pathway by downregulating the expression and activity of MMP9.
Research Motion Blurred Image Restoration Algorithms
Qiong Li,Junhui Rao,Xiaofeng Yang 보안공학연구지원센터 2015 International Journal of Signal Processing, Image Vol.8 No.9
Subject in the process of image acquisition and the relative games between the camera or camera image fuzzy, it seriously affected the further image feature extraction, target recognition and image analysis. In order to meet the needs of reality, get high quality image, we must be used image restoration techniques for fuzzy image restoration. Based on the detailed study on the basis of the theory of wavelet transform, we confirmed by experiments in motion blurred image of wavelet and decomposition level .The method to identify the fuzzy parameters, under the condition of without noise and with noise on the four classic image restoration algorithm, the simulation experiment using the peak signal-to-noise ratio, mean square error, average gray level gradient method and Laplace operator method of four kinds of image quality evaluation index to evaluate the healing effect and recovery result diagram and its quality evaluation. Through the scene shooting motion blurred image point spread function of parameter identification and image restoration, it demonstrates that the proposed point spread function’s parameters identification method is sound and effective.
Reliability analysis of degradation with a new independent increment process
Qiong Wu,Jianzhong Yang,Jingyan Wang,Li Xue 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.10
Degradation test is an important method to assess the reliability of complex systems and highly reliable products. The effectiveness ofa degradation model depends strongly on the suitability of the model to describe the process. This paper proposes a new degradationmodel in which the characteristics of the widely used stochastic process and degradation path models are considered simultaneously. According to the proposed model, closed-form expressions of the performance distribution, failure time distribution and their percentiles,as well as reliability, can be obtained easily. A one-stage procedure is then developed to estimate the model parameters, based on which,estimations of the performance distribution, failure time distribution, and reliability are also presented in the paper. Finally, simulationstudies are conducted to validate the proposed method. Results suggest that the method provides precise estimates even for zero-failurecases or an extremely small sample size of approximately five.