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A MODIFIED FAST ALGORITHM OF INDEPENDENT COMPONENT ANALYSIS
Jiaxuan Yang,Chuanying Jia,Xiwei Feng,Guoyou Shi 한국멀티미디어학회 2006 한국멀티미디어학회 국제학술대회 Vol.2006 No.-
Independent component analysis (ICA) is a statistical method for transforming an observed multidimensional random vector into components that are statistically as independent from each other as possible. In this paper we discuss the independent component analysis simply, then present a new algorithm for ICA based on FastICA algorithm, namely M-FastICA. The characteristic of M-FastICA algorithm is that only the Jacobian of first iteration is computed, which is used in latter iteration process. The M-FastICA reduces the number of iteration, improves the speed of convergence. Finally an illustration validated this method.
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Corrosion Behavior in Nitric Acid Solution and Tensile Properties of (CuFeNiMn)1−xCrx HEAs
Xu Chen,Jiaxuan Hu,Ye Liu,Feng Xiang 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.7
The empirical prediction on the phase formation in as-cast (CuFeMnNi)1−xCrx alloys was consistent with the previousexperimental results, which indicated that the BCC phase formed in the alloys was in the thermodynamically unstable state. The corrosion resistance of the alloys in 2 wt% HNO3 solution was increased with the increased Cr content which wasmainly related to the formation of large anode and small cathode, increasing total volume fraction of Cr-rich FCC1 and BCCphases, the more uniform distribution of Cu and decreasing relative Cu content. The (CuFeMnNi)0.75Cr0.25 alloy exhibitedan excellent corrosion resistance dominated by localized corrosion, while the CuFeMnNi alloy showed the worst corrosionresistance. Moreover, the strength of the investigated alloys increased while the ductility decreased with the increasing of Crcontent, revealing that the extrinsic features played a more important role in the fracture behavior than the intrinsic features.
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Design and implementation of smart bartender system based on Arduino UNO
Wang Junkai,Zhang Jiaxuan,Zhou Xuyun,Cui Shuyu,Huang Junru,Qiu Ziehen,Feng Zunhao,In Soo Lee 한국정보기술학회 2021 Proceedings of KIIT Conference Vol.2021 No.11
본 발명품은 Arduino UNO를 사용하여 설계한 바텐딩 제어 시스템을 채용한 것으로서 주요 기능은 전자밸브와 펌프의 공동 작동을 통해 모든 음료의 토핑 재료를 정확하게 추출하여 혼합하여 생산하며, 수출 상단에는 LED와 음향을 장착하여 시각 및 청각 효과를 더욱 좋게 하였으며, 바텐더의 도움 없이도 가정에서 사용할 수 있다. With the development of intelligent electronic technology, newly smart machine technology comes true. This paper mainly use Arduino UNO to design a control system of the current blender, the main function of the system is to accurately control the ingredient of each drink through the peristaltic pump control circuit and relay circuit, the wine is modulated by the mixing mechanism, For better visual and acoustic effects, LED and sound are added above the reclaiming port. Through the order system to select drinks without the intervention of the staff, the equipment is in the state of no sales.
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Zhou Jian,Ding Feng,Yang Jiaxuan,Pei Zhengqiang,Wang Chenxu,Zhang Anmin 대한조선학회 2021 International Journal of Naval Architecture and Oc Vol.13 No.1
This paper proposes a decision support model for USVs to improve the accuracy of collision avoidance decision-making. It is formed by Navigation Safety Domain (NSD) and domain-based Collision Risk Index (CRI), capable of determining the collision stage and risk between multiple ships. The NSD is composed of a warning domain and a forbidden domain, which is constructed under the constraints of COLREGs (International Regulations for Preventing Collisions at Sea). The proposed domain based CRI takes the radius of NSD in various encounter situations as threshold parameters. It is found that the value of collision risk in any directions can be calculated, including actual value and risk threshold. A catamaran USV and 6 given vessels are taken as study objects to validate the proposed model. It is found that the judgment of collision stage is accurate and the azimuth range of risk exists can be detected, hence the ships can take direct and effective collision avoidance measures. According to the relation between the actual value of CRI and risk threshold, the decision support rules are summarized, and the specific terms of COLREGs to be followed in each encounter situation are given.
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Qingxi Hu,Qi Wang,Suihong Liu,Ye Lu,Zhaoxiang Zeng,Jiaxuan Feng,Rui Feng,Haiguang Zhang 한국섬유공학회 2023 Fibers and polymers Vol.24 No.2
Nowadays, many studies focus on the preparation of small-diameter vascular scaffolds, but some issues still existed that needto be urgently solved, but there are still problems such as slow endothelialization and failure to keep the vessels open for a longtime that need to be solved. In this paper, a composite process of preparing triple-layer vascular scaffolds with microchannelstructure in the inner layer is proposed to guide cell growth and accelerate the endothelialization process. The PCL patternwas printed as the intermediate layer of the vascular scaffold by 3D printing method, and the width of the microchannel inthe inner layer of the scaffold was controlled by the printing spacing. The inner and outer layers were prepared by electrospinning. Heparin is often used as an anticoagulant in vascular tissue engineering to improve the problem of thrombosisand blockage of vascular scaffold after transplantation into the body. Here, the inner layer carries heparin immobilized withsilk fibroin by coaxial electrospinning, so that heparin can be released slowly. The addition of silk fibroin also improvedthe hydrophilicity of PCL electrospinning film by water contact angle test. The mechanical properties of vascular scaffoldswith double intermediate layers (DIL) are better than those with single intermediate layers (SIL) and also better than pureelectrospinning scaffolds. In vitro cell experiments showed that cells grow directionally on microchannel structures of innerlayer and randomly on electrospinning film without microchannel structure. The results showed that the microchannels weremore conducive to cell growth and proliferation at a diameter of 0.25 mm. The composite electrospinning films with silkfibroin and heparin facilitated cell adhesion and proliferation compared to the pure PCL films. All these results indicate thatthe vascular scaffolds have potential applications in clinic for vascular tissue regeneration.
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