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Bian, Z.G.,Chen, W.Q.,Zhao, J. Techno-Press 2010 Structural Engineering and Mechanics, An Int'l Jou Vol.34 No.4
A smart hollow cylinder consisting of a host functionally graded elastic core layer and two surface homogeneous piezoelectric layers is presented in this paper. The bonding between the layers can be perfect or imperfect, depending on the parameters taken in the general linear spring-layer interface model. The effect of such weak interfaces on free vibration and steady-state response is then investigated. Piezoelectric layers at inner and outer surfaces are polarized axially or radially and act as a sensor and an actuator respectively. For a simply supported condition, the state equations with non-constant coefficients are obtained directly from the formulations of elasticity/piezoelasticity. An approximate laminated model is then introduced for the sake of solving the state equations conveniently. It is further assumed that the hollow cylinder is embedded in an elastic medium and is simultaneously filled with compressible fluid. The interaction between the structure and its surrounding media is taken into account. Numerical examples are finally given with discussions on the effect of some related parameters.
Flavor and CP-violating Higgs sector in two Higgs doublet models with U(1)'
Bian Ligong,Lee Hyun Min,Park Chan Beom 한국물리학회 2021 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.79 No.2
We investigate the role of a local U(1)' symmetry for the problem of CP violation in the effective theory for two Higgs doublet models and its microscopic counterparts. First, in the two Higgs doublet models with U(1)' , we show that the higherdimensional operators in the scalar potential violate the CP symmetry with an interplay with the mixing mass parameter, giving rise to small mixings between CP-even and CP-odd scalars. Motivated by the B-meson anomalies in recent years, we take the flavored U(1)' to be a benchmark model for specifying the flavor structure. Then, we calculate the electric dipole moment of the electron (eEDM) at two loops due to the CP-violating higher-dimensional operators and identify the correlation between the masses of heavy Higgs bosons and the cutoff scale from the bound on the eEDM. We also comment on the possibility of making an independent test of the CP violation in collider searches for heavy Higgs bosons. Finally, we show how the obtained eEDM results in the effective theory can be used to constrain microscopic models with an explicit CP violation in partially decoupled or dark sectors.
A Design Method for Cascades Consisting of Circular Arc Blades with Constant Thickness
Bian, Tao,Han, Qianpeng,Bohle, Martin Korean Society for Fluid machinery 2017 International journal of fluid machinery and syste Vol.10 No.1
Many axial fans have circular arc blades with constant thickness. It is still a challenging task to calculate their performance, i.e. to predict how large their pressure rise and pressure losses are. For this task a need for cascade data exists. Therefore, the designer needs a method which works quickly for design purposes. In the present contribution a design method for such cascades consisting of circular arc blades with constant thickness is described. It is based on a singularity method which is combined with a CFD-data-based flow loss model. The flow loss model uses CFD-data to predict the total pressure losses. An interpolation method for the CFD-data are applied and described in detail. Data of measurements are used to validate the CFD-data and parameter variations are conducted. The parameter variations include the variation of the camber angle, pitch chord ratio and the Reynolds number. Additionally, flow patterns of two dimensional cascades consisting of circular arc blades with constant thickness are shown.
Speed Sensorless Control of a Bearingless Induction Motor Based on Modified Robust Kalman Filter
Bian Yifan,Yang Zebin,Sun Xiaodong,Wang Xiang 대한전기학회 2024 Journal of Electrical Engineering & Technology Vol.19 No.3
To enhance the speed identifcation accuracy in speed sensorless control of a bearingless induction motor (BIM), a speed sensorless control strategy based on modifed robust Kalman flter is proposed. Firstly, the suboptimal principle of the H∞ control method is introduced into the extended Kalman flter to construct the robust Kalman flter. Secondly, the rotor fux linkage of the BIM in the α-β coordinate system is discretized, which is used as a reference model and adjustable model in the model reference adaptive system. At the same time, the modifed robust Kalman flter is obtained by combining the robust Kalman flter with the model reference adaptive system. Finally, the simulation and experimental results show that the proposed BIM speed sensorless control system based on modifed robust Kalman flter has higher accuracy of speed identifcation than the extended Kalman flter control under diferent operation conditions of no-load, sudden load, speed change, and motor parameter mismatch. The motor also has a good suspension performance.
Bian, Yiying,An, Gwang-Jin,Kim, Keunyoung,Ngo, Thien,Shin, Sue,Bae, Ok-Nam,Lim, Kyung-Min,Chung, Jin-Ho Pergamon 2019 Food and Chemical Toxicology Vol. No.
<P><B>Abstract</B></P> <P>Ginseng and its active gradient, ginsenoside Rg3 (Rg3), are widely used for a variety of health benefits, but concerns over their misuses are increasing. Previously, it has been reported that Rg3 can cause hemolysis, but its health outcome remains unknown. Here, we demonstrated that Rg3 could promote the procoagulant activity of erythrocytes through the process of hemolysis, ultimately leading to increased thrombosis. In freshly isolated human erythrocytes, Rg3 caused pore formation and fragmentation of the erythrocyte membrane. Confocal microscopy observation and flow cytometric analysis revealed that remnant erythrocyte fragments after the exposure to Rg3 expressed phosphatidylserine (PS), which can promote blood coagulation through providing assembly sites for coagulation complexes. Rat <I>in vivo</I> experiments further confirmed that intravenous administration of Rg3 produced PS-bearing erythrocyte debris and increased thrombosis. Collectively, we demonstrated that Rg3 could induce the procoagulant activity of erythrocytes by generating PS-bearing erythrocyte debris through hemolysis, which might provoke thrombosis.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Ginsenoside Rg3, an active ingredient of ginseng, can induce PS bearing erythrocyte fragments through hemolysis. </LI> <LI> PS-bearing erythrocyte fragments resulting from Rg3 exposure can accelerate thrombin generation and increase adherence of erythrocytes to endothelial cells. </LI> <LI> Rg3 administration potentiated thrombus formation rat <I>in vivo.</I> </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>