Electrospun Li2MnO3-Modified Li1.2NixCo0.1Mn0.9-xO2 Nanofibers: Synthesis and Enhanced Electrochemical Performance for Lithium-Ion Batteries

Jing Yao,Xinlu Wang,Xinru Zhao,Jinxian Wang,Hongbo Zhang,Wensheng Yu,Guixia Liu,Xiangting Dong 대한금속·재료학회 2016 ELECTRONIC MATERIALS LETTERS Vol.12 No.6

The Li2MnO3-modified Li1.2NixCo0.1Mn0.9-xO2 (x = 0.2, 0.45, 0.7)as cathode materials for lithium-ion batteries have beensuccessfully synthesized by a simple electrospinning process. Thestructure, morphology and electrochemical performances of theresulting products are studied systematically. The as-preparedLi2MnO3-modified Li1.2NixCo0.1Mn0.9-xO2 (x = 0.2, 0.45, 0.7) with adiameter of 200-300 nm has an initial discharge capacity of168.740 mAh·g−1, coulombic efficiency of 99.6% and a reversiblecapacity as high as 139.016 mAh·g−1 after 200 cycles at a currentrate of 0.2 C. The excellent electrochemical performances ofwhich are attributed to the stabilization of Li2MnO3 structure, therole of Li2MnO3 is contribute extra lithium to the reversiblecapacity and to facilitate Li+ transport through the structure.

Cross-coupled fuzzy PID control combined with full decoupling compensation method for double cylinder servo control system

Jing Yao,Xiaoming Cao,Yang Zhang,Yao Li 대한기계학회 2018 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.32 No.5

The purpose of this thesis is to develop a double cylinder synchronization control system to address the high precision control requirement of this system. First, the dual-input dual-output coupling mathematical model of the hydraulic press synchronization control system was built using mechanism modelling. Then, the mathematical model of compensating and decoupling links is established by the input and load disturbance decoupling control method based on feedback compensation. Next, a cross-coupled fuzzy PID controller is designed, which is then combined with full decoupling compensation method. Finally, the coupling characteristics of the synchronization control system and the synchronization control performance of the hydraulic cylinders under the cross-coupled fuzzy PID controller combined with the decoupling control algorithm were tested and evaluated in a principle experiment platform. The results indicate that the robustness and the ability to resist interference load are improved under the theory and control strategy outlined in this paper.

Displacement and dual-pressure compound control for fast forging hydraulic system

Jing Yao,Bin Liu,Xiangdong Kong,Fang Zhou 대한기계학회 2016 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.30 No.1

The poor energy efficiency is a big issue in the conventional electro-hydraulic proportional valve controlled fast forging system due tothe huge throttling losses and overflow losses. Aimed to address this problem, a new compound control strategy of displacement anddual-pressure was proposed in this study. Firstly, the mathematic model of the main components was built, and the compound controlstrategy was designed depending on the different working conditions. Then, the overall control system was integrated for both downstrokestage and return-stroke stage. The proposed control strategy was tested and evaluated in a 0.6 MN fast forging press. Results indicatedthat the input energy was reduced by 50% and energy loss decreased dramatically while control performance is good. Results alsoshow that control performance and energy saving is significantly affected by the variation of △p and pb. Overall, the proposed new controlstrategy could be used for the fast forging press with high energy efficiency.

Systolic blood pressure measurement algorithm with mmWave radar sensor

JingYao Shi,KangYoon Lee 한국인터넷정보학회 2022 KSII Transactions on Internet and Information Syst Vol.16 No.4

Blood pressure is one of the key physiological parameters for determining human health, and can prove whether human cardiovascular function is healthy or not. In general, what we call blood pressure refers to arterial blood pressure. Blood pressure fluctuates greatly and, due to the influence of various factors, even varies with each heartbeat. Therefore, achievement of continuous blood pressure measurement is particularly important for more accurate diagnosis. It is difficult to achieve long-term continuous blood pressure monitoring with traditional measurement methods due to the continuous wear of measuring instruments. On the other hand, radar technology is not easily affected by environmental factors and is capable of strong penetration. In this study, by using machine learning, tried to develop a linear blood pressure prediction model using data from a public database. The radar sensor evaluates the measured object, obtains the pulse waveform data, calculates the pulse transmission time, and obtains the blood pressure data through linear model regression analysis. Confirm its availability to facilitate follow-up research, such as integrating other sensors, collecting temperature, heartbeat, respiratory pulse and other data, and seeking medical treatment in time in case of abnormalities.

운동화 열풍에 대한 연구: 수집열풍에서 디지털아트로의 변천

한경요 ( Jingyao Han ),박경진 ( Kyungjin Park ) 인문사회 21 2023 인문사회 21 Vol.14 No.1

연구목적: 본 연구는 운동화가 어떻게 시장혁신을 통해 우리 사회에 영향을 끼치고 있는지, 왜 많은 사람들이 열광하는지에 대해 검토한다. 연구방법: 본 연구는 수집문화부터 디지털아트 형식의 유행에 이르는 운동화 열풍에 대해 분석하기 위해 문헌적 연구방법을 사용한다. 연구내용: 단순히 발 보호의 역할을 담당하던 운동화가 어떻게 그리고 언제부터 유행하게 되었는지, 또한 어떻게 NTF 등을 통해 디지털아트화 되었는지 알아보았다. 결론 및 제언: 운동화열풍은 사회정체성이론, 수요공급의 법칙, 잊히는 것에 대한 두려움인 포모증후군 등에 의해 설명될 수 있는 사회적 현상이다. This study aims to review the history of how sneakers create a massive impact in our society by revolutionizing the market and why lots of people go enthusiastic for them. It utilizes literature research approach to analyze sneaker fever in the culture of collection and even in the form of digital art boom. It explores how and when sneakers become a craze of more than just being a feet protection and how they become a form of digital art through NFT etc. In conclusion, it suggests that the sneaker fever can be explained by several social science theories like the social identity theory, the law of supply and demand, and the concept of the fear of missing (FOMO).

텐세그리티 구조물 설계를 위한다목적 최적화 기법에 관한 연구

Makoto Ohsaki,Jingyao Zhang,김재열 한국공간구조학회 2008 한국공간구조학회지 Vol.8 No.1

A multiobjective optimization approach is presented for force design of tensegrity structures. The geometry of the structure is given a priori. The design variables are the member forces, and the objective functions are the lowest eigenvalue of the tangent stiffness matrix that is to be maximized, and the deviation of the member forces from the target values that is to be minimized. The multiobjective programming problem is converted to a series of single-objective programming problems by using the constraint approach. A set of Pareto optimal solutions are generated for a tensegrity grid to demonstrate the validity of the proposed method.

Preparation of catalytic particle electrodes from steel slag and its performance in a three-dimensional electrochemical oxidation system

Zhaoyang Wang,Jingyao Qi,Yan Feng,Ke Li,Xin Li 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.5

Catalytic particle electrodes (CPEs) were developed from steel slag waste, and were used to degrade Rhodamine B (RhB). To improve degradation efficiency, Mn-loaded CPEs with good reproductive performance were constructed through ultrasound impregnation–calcination strategy. The resulting samples were characterized by XRF, SEM, EDS, XPS and XRD. Degradation efficiency of the systems with Mn-loaded CPEs were 93.22% without air supply in 80 min. And degradation efficiency for Mn-loaded CPEs reached 100% with air supply in 50 min. Furthermore, the enhanced mechanism was proposed. The high degradation efficiency could be ascribed to the increase of hydroxyl radicals originated from electro-Fenton.

Cloning and functional analysis of two GmDeg genes in soybean [Glycine max (L.) Merr.]

Xing Kong,Jingyao Zhang,Deyue Yu,Jun-Yi Gai,Shouping Yang 한국식물학회 2017 Journal of Plant Biology Vol.60 No.1

Although light is the ultimate substrate in photosynthesis, strong light can also be harmful and lead to photoinhibition. The DEG proteases play important roles in the degradation of misfolded and damaged proteins. In this study, two photoinhibition-related genes from soybean [Glycine max (L.) Merr.], GmDeg1 and GmDeg2, were cloned. Bioinformatics analysis indicated that these two proteases both contain a PDZ domain and are serine proteases. The expression levels of GmDeg1 and GmDeg2 increased significantly after 12 h of photooxidation treatment, indicating that GmDeg1 and GmDeg2 might play protective roles under strong light conditions. In in vitro proteolytic degradation assays, recombinant GmDeg1 and GmDeg2 demonstrated biological activities at temperatures ranging from 20°C to 60°C and at pH 5.0 to 8.0. By contrast, the proteases showed no proteolytic effect in the presence of a serine protease inhibitor. Taken together, these results provided strong evidence that GmDeg1 and GmDeg2 are serine proteases that could degrade the model substrate in vitro, indicating that they might degrade damaged D1 protein and other mis-folded proteins in vivo. Furthermore, GmDeg1 and GmDeg2 were transformed into Arabidopsis thaliana to obtain transgenic plants. Leaves from the transgenic and wild-type plants were subjected to strong light conditions in vitro, and the PSII photochemical efficiency (Fv/Fm) was measured. The Fv/Fm of the transgenic plants was significantly higher than that of the wild-type plants at most time points. These results imply that GmDeg1 and GmDeg2 would have similar functions to Arabidopsis AtDeg1, thus accelerating the recovery of PSII photochemical efficiency.

수평으로 정렬된 탄소나노튜브를 이용한 고성능 바나듐 레독스 플로우 배터리용 분리판 설계

정재문(Jae-Moon Jeong),Jingyao Dai,Luiz Acauan,정광일(Kwang Il Jeong),홍현수,Brian L. Wardle,김성수(Seong Su Kim) 대한기계학회 2023 대한기계학회 춘추학술대회 Vol.2023 No.11

Fault-tolerant Model Predictive Current Control of Six-Phase Permanent Magnet Synchronous Motors with Pulse Width Modulation

Yao Ming,Peng Jingyao,Sun Xiaodong,Sun Yueping 대한전기학회 2023 Journal of Electrical Engineering & Technology Vol.18 No.3

A model predictive current control strategy with pulse width modulation is proposed for a single-phase open circuit fault. This method decomposes the change matrix based on the normal vector space to ensure that the decoupling matrix remains unchanged so that there is no need to reconfigure the controller topology. By analysing the fault phase voltage difference under normal and fault conditions, 24 synthetic virtual voltage vectors are used to compensate the voltage vector during a single-phase fault and eliminate the current coupling problem. In addition, a standard pulse width modulation switching sequence is implemented to achieve the purpose of unifying the switching frequency, which makes the method easy to implement. Finally, the effectiveness of the proposed method is verified by experiments.