Yubiao Zhang
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View article: Ethyl Cellulose/Titanium Dioxide Film-Coated Qcm Humidity Sensor and its Multifunctional Applications
Ethyl Cellulose/Titanium Dioxide Film-Coated Qcm Humidity Sensor and its Multifunctional Applications Open
View article: Sampling Observability for Heat Equations with Memory
Sampling Observability for Heat Equations with Memory Open
This paper studies the sampling observability for the heat equations with memory in the lower-order term, where the observation is conducted at a finite number of time instants and on a small open subset at each time instant. We present a …
View article: A novel method for predicting local plastic mechanical properties of metal structures by integrating microstructure and instrumented indentation technique
A novel method for predicting local plastic mechanical properties of metal structures by integrating microstructure and instrumented indentation technique Open
Most important mechanical structures produce complex variations in local material mechanical properties during molding and in-service processes. Accurate testing of material mechanical properties is fundamental to structural integrity asse…
View article: Cracking Driving Force at the Tip of SCC under Heterogeneous Material Mechanics Model of Safe-End Dissimilar Metal-Welded Joints in PWR
Cracking Driving Force at the Tip of SCC under Heterogeneous Material Mechanics Model of Safe-End Dissimilar Metal-Welded Joints in PWR Open
The complicated driving force at the stress corrosion cracking (SCC) tip of the safe-end dissimilar metal-welded joints (DMWJs) in the pressurized water reactor (PWR) is mainly caused by the heterogeneous material mechanical properties. In…
View article: Effect of Mechanical Heterogeneity on Strain and Stress Fields at Crack Tips of SCC in Dissimilar Metal Welded Joints
Effect of Mechanical Heterogeneity on Strain and Stress Fields at Crack Tips of SCC in Dissimilar Metal Welded Joints Open
The crack tip strain and stress condition are one of the main factors affecting stress corrosion cracking (SCC) behaviors in the dissimilar metal welded joint of the primary circuit in the pressurized water reactor. The mechanical property…
View article: The impact of leuprolide acetate-loaded calcium phosphate silicate cement to bone regeneration under osteoporotic conditions
The impact of leuprolide acetate-loaded calcium phosphate silicate cement to bone regeneration under osteoporotic conditions Open
Osteoporosis is detrimental to the health of skeletal structure and significantly increases the risks of bone fracture. Moreover, bone regeneration is adversely impaired by increased osteoclastic activities as a result of osteoporosis. In …
View article: Observability for heat equations with time-dependent analytic memory
Observability for heat equations with time-dependent analytic memory Open
This paper presents a complete analysis of the observability property of heat equations with time-dependent real analytic memory kernels. More precisely, we characterize the geometry of the space-time measurable observation sets ensuring s…
View article: Reachable subspaces, control regions and heat equations with memory
Reachable subspaces, control regions and heat equations with memory Open
We study the controlled heat equations with analytic memory from two perspectives: reachable subspaces and control regions. Due to the hybrid parabolic-hyperbolic phenomenon of the equations, the support of a control needs to move in time …
View article: Decomposition for the flow of the heat equation with memory
Decomposition for the flow of the heat equation with memory Open
We analyze the dynamics of the heat equation with a general memory kernel, through building up a decomposition for the flow generated by the equation. This decomposition not only reveals a hybrid parabolic-hyperbolic phenomenon of the flow…
View article: Flow decomposition for heat equations with memory
Flow decomposition for heat equations with memory Open
We build up a decomposition for the flow generated by the heat equation with a real analytic memory kernel. It consists of three components: The first one is of parabolic nature; the second one gathers the hyperbolic component of the dynam…
View article: Correction to: Comprehensive Analysis and Optimization of Dynamic Vibration-Absorbing Structures for Electric Vehicles Driven by In-Wheel Motors
Correction to: Comprehensive Analysis and Optimization of Dynamic Vibration-Absorbing Structures for Electric Vehicles Driven by In-Wheel Motors Open
View article: Comprehensive Analysis and Optimization of Dynamic Vibration-Absorbing Structures for Electric Vehicles Driven by In-Wheel Motors
Comprehensive Analysis and Optimization of Dynamic Vibration-Absorbing Structures for Electric Vehicles Driven by In-Wheel Motors Open
Distributed-drive electric vehicles (EVs) replace internal combustion engine with multiple motors, and the novel configuration results in new dynamic-related issues. This paper studies the coupling effects between the parameters and respon…
View article: Multi-axle Vehicle Modeling and Stability Control: A Reconfigurable Approach
Multi-axle Vehicle Modeling and Stability Control: A Reconfigurable Approach Open
Multi-axle vehicles, such as trucks and buses, have been playing a vital role in trucking industry, public transportation system, and long-distance transport services. However, at the same time, statistics suggest more than one million liv…
View article: Mixed local motion planning and tracking control framework for autonomous vehicles based on model predictive control
Mixed local motion planning and tracking control framework for autonomous vehicles based on model predictive control Open
This study proposes a novel mixed motion planning and tracking (MPT) control framework for autonomous vehicles (AVs) based on model predictive control (MPC), which is made up of an MPC‐based longitudinal motion planning module, a feed‐forw…
View article: Asymptotic observability identity for the heat equation in R^d
Asymptotic observability identity for the heat equation in R^d Open
We build up an asymptotic observability identity for the heat equation in the whole space. It says that one can approximately recover a solution, through observing it over some countable lattice points in the space and at one time. This as…
View article: Adaptive Yaw Control Of Three-Axle Road Vehicles Based On Mass, Yaw Inertia And Cg Position Identification
Adaptive Yaw Control Of Three-Axle Road Vehicles Based On Mass, Yaw Inertia And Cg Position Identification Open
This paper introduces an adaptive yaw control scheme based on the estimation of the vehicle mass, yaw inertia and center of gravity (CG) position. The control deigns for three-axle road vehicles, which can be trucks, buses, or even three-a…
View article: Observable set, observability, interpolation inequality and spectral inequality for the heat equation in R^n
Observable set, observability, interpolation inequality and spectral inequality for the heat equation in R^n Open
View article: Observable set, observability, interpolation inequality and spectral inequality for the heat equation in $\mathbb{R}^n$
Observable set, observability, interpolation inequality and spectral inequality for the heat equation in $\mathbb{R}^n$ Open
This paper studies connections among observable sets, the observability inequality, the Hölder-type interpolation inequality and the spectral inequality for the heat equation in $\mathbb R^n$. We present a characteristic of observable sets…
View article: Time optimal sampled-data controls for heat equations
Time optimal sampled-data controls for heat equations Open
In this paper, we first design a time optimal control problem for the heat equation with sampled-data controls, and then use it to approximate a time optimal control problem for the heat equation with distributed controls. Our design is re…
View article: Decompositions and bang-bang properties
Decompositions and bang-bang properties Open
We study the bang-bang properties of minimal time and minimal norm control problems (where the target set is the origin of the state space and the controlled system is linear and time-invariant) from a new perspective. More precisely, we s…
View article: Observability and unique continuation inequalities for the Schrödinger equation
Observability and unique continuation inequalities for the Schrödinger equation Open
In this paper, we present several observability and unique continuation inequalities for the free Schrödinger equation in the whole space. The observations in these inequalities are made either at two points in time or one point in time. T…
View article: Decompositions and bang-bang properties
Decompositions and bang-bang properties Open
In this paper, minimal time and minimal norm control problems are studied. The target sets considered are the origin of state spaces and controls are point-wisely bounded functions. The system stuided in this paper is assumed to have no th…
View article: Impulse and Sampled-Data Optimal Control of Heat Equations, and Error Estimates
Impulse and Sampled-Data Optimal Control of Heat Equations, and Error Estimates Open
We consider the optimal control problem of minimizing some quadratic\nfunctional over all possible solutions of an internally controlled\nmulti-dimensional heat equation with a periodic terminal state constraint. This\nproblem has a unique…
View article: Unique continuation estimates for the Kolmogorov equation in the whole space
Unique continuation estimates for the Kolmogorov equation in the whole space Open
We prove in this Note an observation estimate at one point in time for the Kolmogorov equation in the whole space. Such estimate implies the observability and the null controllability for the Kolmogorov equation with a control region which…
View article: Impulse and sampled-data optimal control of heat equations, and error estimates
Impulse and sampled-data optimal control of heat equations, and error estimates Open
We consider the optimal control problem of minimizing some quadratic functional over all possible solutions of an internally controlled multi-dimensional heat equation with a periodic terminal state constraint. This problem has a unique op…