Deformation Analysis of Brass in Micro Compression Test with Presence of Ultrasonic Vibration

Yang Bai,Ming Yang 한국정밀공학회 2015 International Journal of Precision Engineering and Vol. No.

The application of ultrasonic vibration in metal forming is attracting more attention due to the better performance of ultrasonicassistedprocess. By adding small vibration amplitude on tools, the plastic deformation behavior of metal material would differ fromthe static process. In this study, ultrasonic-assisted compression test was carried out to investigate the influences induced by ultrasonicsystematically. Ultrasonic influences on material flow stress, friction and temperature were analyzed. Acoustic softening effect wasfound size dependent and a new model on basis of surface grain model was proposed to explain it. Numerical simulations werecarried out to validate and compare with experimental results.

Word of Mouth and Rudderless Boat: Mediating Constance in The Man of Law’s Tale

Ming-Tsang Yang 한국고전중세르네상스영문학회 2020 중세근세영문학 Vol.30 No.2

Chaucer’s retelling of the Constance story in The Man of Law’s Tale not only presents intricate reflections on problems of mediality in cultural exchange, but is itself a vital medium invested with rich literary and cultural import. The Syrian merchants’ word of mouth, which sets Constance in motion and foregrounds her role as (m)other, attests to the crucial mediation and presence of the East in the tale; the rudderless boat, as a vessel carrying Constance to Northumbria and then back to Rome, dramatizes Providence’s immediate transmission and undergirds the crucial English mediation that transpires to supersede Roman dominance/domicile. In mediating Constance’s travel through the (im)mediacy of the East and the (m)otherland of England, Chaucer’s tale occasions a (re)medial transmutation of the logic of liminality and centrality that envisions a variegated relationship between England and Rome, East and West.

Meta-Cognitive Fuzzy Neural Network Control for Active Power Filter

Ming Yang,Jienan Han,Qianwen Xie 제어로봇시스템학회 2021 제어로봇시스템학회 국제학술대회 논문집 Vol.2021 No.10

In this paper, an adaptive robust meta-cognitive fuzzy-neural-network control using sliding mode control is proposed for active power filter (APF), whereby a meta-cognitive fuzzy-neural-network (MCFNN) is employed to approximate modeling uncertainties. To overcome the drawbacks of conventional sliding mode control, the control law is constructed based on MCFNN rather than the actual systems. Unlike the predefined structure approaches, MCFNN is able to adapt the structure and parameters of the networks using the input information. Moreover, only the parameters of the rule nearest to the current input are adjusted online to reduce redundant or inefficient computation. Subsequently the Lyapunov stability analysis is presented to guarantee tracking performance and stability of the closed-loop system. Simulation studies demonstrate that the proposed control methods exhibit excellent performance in both steady state and transient operation.

Band Gap Engineering of Paradigm MOF-5

Yang, Li-Ming,Fang, Guo-Yong,Ma, Jing,Ganz, Eric,Han, Sang Soo American Chemical Society 2014 Crystal Growth & Design Vol.14 No.5

<P>Recently, metal–organic frameworks (MOFs) have demonstrated great potential in photocatalysis and luminosity applications. However, most MOFs are dielectrics with substantial band gaps which limits applications of MOFs in the visible-light region. In this paper, we systematically tune the band gap of paradigm MOF-5 by substituting new atoms for the corner elements (X<SUB>4</SUB>Y), in computer simulations using density functional theory. The new proposed materials are labeled X<SUB>4</SUB>Y–MOF-5 (X = Zn, Cd, Be, Mg, Ca, Sr, Ba; Y = O, S, Se, Te). These new materials have band gaps ranging from 1.7 to 3.6 eV. The underlying mechanism of tunability of band gap can be ascribed to the electronic states of chalcogen atoms (O, S, Se, Te) in the X<SUB>4</SUB>Y nodes and carbon atoms in the BDC linkers. The substantial tunability of band gap leads to a large absorption range covering the visible spectrum. These proposed new materials may be useful for future applications in visible-light promoted photocatalysis or luminosity. The tunability of other properties such as bulk modulus, chemical bonding, and optical properties were also investigated. These novel materials may also be useful for devices in nanoelectronics or optoelectronics.</P><P>The band gap of paradigm MOF-5 is tuned by substituting new atoms for the corner elements (X<SUB>4</SUB>Y) using DFT calculations. The underlying mechanism of the tunability of band gap can be ascribed to the electronic states of chalcogen atoms in the X<SUB>4</SUB>Y nodes and carbon atoms in the BDC linkers, and leads to a large optical absorption range covering the visible spectrum.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/cgdefu/2014/cgdefu.2014.14.issue-5/cg500243s/production/images/medium/cg-2014-00243s_0011.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/cg500243s'>ACS Electronic Supporting Info</A></P>

Lithiation of an Iron Oxide-Based Anode for Stable, High-Capacity Lithium-Ion Batteries of Porous Carbon-Fe₃O₄/Li[Ni_0.59Co_0.16Mn_0.25]O₂

Ming, Jun,Kwak, Won Jin,Youn, Sung Jun,Ming, Hai,Hassoun, Jusef,Sun, Yang-Kook Wiley (John WileySons) 2014 Energy technology Vol.2 No.9

Surfactant-Assisted Synthesis of Fe₂O₃ Nanoparticles and F-Doped Carbon Modification toward an Improved Fe₃O₄@CF_<i>x</i>/LiNi_0.5Mn_1.5O₄ Battery

Ming, Hai,Ming, Jun,Oh, Seung-Min,Tian, Shu,Zhou, Qun,Huang, Hui,Sun, Yang-Kook,Zheng, Junwei American Chemical Society 2014 ACS APPLIED MATERIALS & INTERFACES Vol.6 No.17

<P>A simple surfactant-assisted reflux method was used in this study for the synthesis of cocklebur-shaped Fe<SUB>2</SUB>O<SUB>3</SUB> nanoparticles (NPs). With this strategy, a series of nanostructured Fe<SUB>2</SUB>O<SUB>3</SUB> NPs with a size distribution ranging from 20 to 120 nm and a tunable surface area were readily controlled by varying reflux temperature and the type of surfactant. Surfactants such as cetyltrimethylammonium bromide (CTAB), polyvinylpyrrolidone (PVP), poly(ethylene glycol)-<I>block</I>-poly(propylene glycol)-<I>block</I>-poly(ethylene glycol) (F127) and sodium dodecyl benzenesulfonate (SDBS) were used to achieve large-scale synthesis of uniform Fe<SUB>2</SUB>O<SUB>3</SUB> NPs with a relatively low cost. A new composite of Fe<SUB>3</SUB>O<SUB>4</SUB>@CF<SUB><I>x</I></SUB> was prepared by coating the primary Fe<SUB>2</SUB>O<SUB>3</SUB> NPs with a layer of F-doped carbon (CF<SUB><I>x</I></SUB>) with a one-step carbonization process. The Fe<SUB>3</SUB>O<SUB>4</SUB>@CF<SUB><I>x</I></SUB> composite was utilized as the anode in a lithium ion battery and exhibited a high reversible capacity of 900 mAh g<SUP>–1</SUP> at a current density of 100 mA g<SUP>–1</SUP> over 100 cycles with 95% capacity retention. In addition, a new Fe<SUB>3</SUB>O<SUB>4</SUB>@CF<SUB><I>x</I></SUB>/LiNi<SUB>0.5</SUB>Mn<SUB>1.5</SUB>O<SUB>4</SUB> battery with a high energy density of 371 Wh kg<SUP>–1</SUP> (vs cathode) was successfully assembled, and more than 300 cycles were easily completed with 66.8% capacity retention at 100 mA g<SUP>–1</SUP>. Even cycled at the high temperature of 45 °C, this full cell also exhibited a relatively high capacity of 91.6 mAh g<SUP>–1</SUP> (vs cathode) at 100 mA g<SUP>–1</SUP> and retained 54.6% of its reversible capacity over 50 cycles. Introducing CF<SUB><I>x</I></SUB> chemicals to modify metal oxide anodes and/or any other cathode is of great interest for advanced energy storage and conversion devices.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/aamick/2014/aamick.2014.6.issue-17/am504144d/production/images/medium/am-2014-04144d_0009.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/am504144d'>ACS Electronic Supporting Info</A></P>

AFP, PIVKA-II, AFP-L3 alone and in combination for early detection of hepatocellular carcinoma in nonalcoholic fatty liver disease: A multicenter analysis

Ming-Cheng GUAN,Wei OUYANG,Si-Yu LIU,Li-Yang SUN,Wei-Yue CHEN,Xiang-Min TONG,Hong ZHU,Tian YANG 한국간담췌외과학회 2022 Annals of hepato-biliary-pancreatic surgery Vol.26 No.-

Study of the H2O/Al2O3 Interface and the Acting Mechanism of Water in the Working Electrolyte

Ming Jia,Qiang Li,Lixiang Li,Liang Cao,Juan Yang,Xiang-Yang Zhou,Liang Ai 대한금속·재료학회 2018 ELECTRONIC MATERIALS LETTERS Vol.14 No.5

Using a working electrolyte containing mixed solvents of ethylene glycol and N,N-dimethylformamide, this paper presentsa study of the reactions on the H2O/Al2O3 interface with sum frequency vibrational spectroscopy and the effects of differentwater content on the performance of the working electrolyte and an aluminum electrolytic capacitor and summarizes the rulesof the variations in the performance parameters of the working electrolyte and aluminum electrolytic capacitor with respect tothe water content. The results demonstrate that, when the water content is increased from 2.5 to 15%, the conductivity of theworking electrolyte increased by 930 μS/cm, and the sparking voltage decreased by 27 V. Also, the increased water contentcauses lower oxidation efficiency and lower thermal stability. The leakage current of the aluminum electrolytic capacitorafter high-temperature storage increases with an increase in the water content, and the attenuation rate of capacitor’s thelow-temperature capacitance decreases with an increase in the water content.

Fluorine-doped porous carbon-decorated Fe₃O₄-FeF₂ composite versus LiNi_0.5Mn_1.5O₄ towards a full battery with robust capability

Ming, Hai,Ming, Jun,Kwak, Won-Jin,Yang, Wenjing,Zhou, Qun,Zheng, Junwei,Sun, Yang-Kook Elsevier 2015 ELECTROCHIMICA ACTA Vol.169 No.-

<P><B>Abstract</B></P> <P>A new fluorine-doped porous carbon-decorated Fe<SUB>3</SUB>O<SUB>4</SUB>-FeF<SUB>2</SUB> composite, referred to as Fe<SUB>3</SUB>O<SUB>4</SUB>-FeF<SUB>2</SUB>@CF<SUB>x</SUB>, was prepared for the first time. The formation mechanism is discussed, and a new concept of introducing double layers of FeF<SUB>2</SUB> and CF<SUB>x</SUB> into the oxide-based anode is presented for lithium ion batteries. Varying the amount of fluorine precursor, derivatives of Fe<SUB>3</SUB>O<SUB>4</SUB>@CF<SUB>x</SUB> and FeF<SUB>2</SUB>@CF<SUB>x</SUB> were further obtained, allowing an original analysis of their electrochemical behaviors. As-prepared Fe<SUB>3</SUB>O<SUB>4</SUB>-FeF<SUB>2</SUB>@CF<SUB>x</SUB> can deliver a high capacity of 718mAhg<SUP>−1</SUP> at 50mAg<SUP>−1</SUP>. Under a hash rate of 1600mAg<SUP>−1</SUP>, the capacity of Fe<SUB>3</SUB>O<SUB>4</SUB>-FeF<SUB>2</SUB>@CF<SUB>x</SUB> (around 338mAhg<SUP>−1</SUP>) is higher than that (200mAhg<SUP>−1</SUP>) of FeF<SUB>2</SUB>@CF<SUB>x</SUB>. Further, its capacity retention of 97% over 100 cycles is much better than the 59.4% observed for Fe<SUB>3</SUB>O<SUB>4</SUB>@CF<SUB>x</SUB>. The positive effect of the CF<SUB>x</SUB> layer on the electronic conductivity and ionic diffusion ability was confirmed. The role of FeF<SUB>2</SUB> in the stabilization of the structure of CF<SUB>x</SUB> and Fe<SUB>3</SUB>O<SUB>4</SUB> is also discussed. Further, a new battery composed of Fe<SUB>3</SUB>O<SUB>4</SUB>-FeF<SUB>2</SUB>@CF<SUB>x</SUB>/LiNi<SUB>0.5</SUB>Mn<SUB>1.5</SUB>O<SUB>4</SUB> with a robust rate capability was assembled and delivered a reversible capacity of 565mAhg<SUP>−1</SUP> (<I>vs.</I> anode) at 100mAg<SUP>−1</SUP> with a high potential of 3.3V and a capacity retention of 81.5% over 50 cycles.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A new anode of fluorine-doped porous Fe<SUB>3</SUB>O<SUB>4</SUB>-FeF<SUB>2</SUB>@CF<SUB>x</SUB> composite is readily prepared. </LI> <LI> The CF<SUB>x</SUB> layer enhances the conductivity of Fe<SUB>3</SUB>O<SUB>4</SUB> and ensures a fast Li<SUP>+</SUP> diffusion. </LI> <LI> The FeF<SUB>2</SUB> can stabilize the structure of Fe<SUB>3</SUB>O<SUB>4</SUB> during the (dis) charge process. </LI> <LI> The Fe<SUB>3</SUB>O<SUB>4</SUB>-FeF<SUB>2</SUB>@CF<SUB>x</SUB> can deliver a high capacity with a robust rate capability. </LI> <LI> A full cell of Fe<SUB>3</SUB>O<SUB>4</SUB>-FeF<SUB>2</SUB>@CF<SUB>x</SUB>/LiNi<SUB>0.5</SUB>Mn<SUB>1.5</SUB>O<SUB>4</SUB> with high performance is assembled. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>A new anode of fluorine doped porous Fe<SUB>3</SUB>O<SUB>4</SUB>-FeF<SUB>2</SUB>@CF<SUB>x</SUB> composite with double layers of FeF<SUB>2</SUB> and CF<SUB>x</SUB> was presented for the first time, and a high rate capability was obtained in lithium ion battery. Besides, a new full battery of Fe<SUB>3</SUB>O<SUB>4</SUB>-FeF<SUB>2</SUB>@CF<SUB>x</SUB>/LiNi<SUB>0.5</SUB>Mn<SUB>1.5</SUB>O<SUB>4</SUB> with a high capacity of 565mAhg<SUP>−1</SUP> (<I>vs</I>. anode) at the current density of 100mAg<SUP>−1</SUP> was successfully introduced. It demonstrated a robust rate capability, high operating potential of 3.3V and fine cycle ability over 50 cycles with capacity retention of 81.5%.</P> <P>[DISPLAY OMISSION]</P>

Aloe-Emodin Induces Chondrogenic Differentiation of ATDC5 Cells via MAP Kinases and BMP-2 Signaling Pathways

( Ming Yang ),( Liang Li ),( Seok Mo Heo ),( Yunjo Soh ) 한국응용약물학회 2016 Biomolecules & Therapeutics(구 응용약물학회지) Vol.24 No.4

Endochondral bone formation is the process by which mesenchymal cells condense into chondrocytes, which are ultimately responsible for new bone formation. The processes of chondrogenic differentiation and hypertrophy are critical for bone formation and are therefore highly regulated. The present study was designed to investigate the effect of aloe-emodin on chondrogenic differentiation in clonal mouse chondrogenic ATDC5 cells. Aloe-emodin treatment stimulated the accumulation of cartilage nodules in a dose-dependent manner. ATDC5 cells were treated with aloe-emodin and stained with alcian blue. Compared with the control cells, the ATDC5 cells showed more intense alcian blue staining. This finding suggested that aloe-emodin induced the synthesis of matrix proteoglycans and increased the activity of alkaline phosphatase. Aloe-emodin also enhanced the expressions of chondrogenic marker genes such as collagen II, collagen X, BSP and RunX2 in a time-dependent manner. Furthermore, examination of the MAPK signaling pathway showed that aloe-emodin increased the activation of extracellular signal-regulated kinase (ERK), but had no effect on p38 and c-jun N-terminal kinase (JNK). Aloe-emodin also enhanced the protein expression of BMP-2 in a time-dependent manner. Thus, these results showed that aloe-emodin exhibited chodromodulating effects via the BMP-2 or ERK signaling pathway. Aloe-emodin may have potential future applications for the treatment of growth disorders.