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Modeling of Electric Field and Dielectrophoretic Force in a Parallel-Plate Cell Separation Device with an Electrode Lid and Analytical Formulation Using Fourier Series.
Sensors (Basel)
December 2024
Department of Applied Physics, National Defense Academy, Hashirimizu 1-10-20, Yokosuka 239-0802, Kanagawa, Japan.
Dielectrophoresis (DEP) cell separation technology is an effective means of separating target cells which are only marginally present in a wide variety of cells. To develop highly efficient cell separation devices, detailed analysis of the nonuniform electric field's intensity distribution within the device is needed, as it affects separation performance. Here we analytically expressed the distributions of the electric field and DEP force in a parallel-plate cell separation DEP device by employing electrostatic analysis through the Fourier series method.
View Article and Find Full Text PDFRobust Distributed Observers for Simultaneous State and Fault Estimation over Sensor Networks.
Sensors (Basel)
November 2024
Deep Space Exploration Laboratory, Beijing 100195, China.
This paper focuses on simultaneous estimation of states and faults for a linear time-invariant (LTI) system observed by sensor networks. Each sensor node is equipped with an observer, which uses only local measurements and local interaction with neighbors for monitoring. The observability of said observer is analyzed where non-local observability of a sensor node is required in terms of the system state and faults.
View Article and Find Full Text PDFA New Method for Joint Sparse DOA Estimation.
Sensors (Basel)
November 2024
National Key Laboratory of Electromagnetic Space Security, Jiaxing 314000, China.
To tackle the issue of poor accuracy in single-snapshot data processing for Direction of Arrival (DOA) estimation in passive radar systems, this paper introduces a method for judiciously leveraging multi-snapshot data. This approach effectively enhances the accuracy of DOA estimation and spatial angle resolution in passive radar systems. Additionally, in response to the non-convex nature of the mixed norm, we propose a hyperbolic tangent model as a replacement, transforming the problem into a directly solvable convex optimization problem.
View Article and Find Full Text PDFWhen can flexible weak polyelectrolytes be treated as effective rigid objects?
J Chem Phys
November 2024
Department of Chemistry, Physics and Environmental and Soil Sciences and Agrotecnio, University of Lleida, Lleida, Catalonia, Spain.
Conformational and ionization equilibria of flexible weak polyelectrolytes (PEs) are, in general, strongly coupled. In this article, we analyze the effect of averaging over (or "contracting") the conformational degrees of freedom so that the original flexible molecule is replaced by an effective rigid object with the same ionization properties. As a result, one obtains the so-called Site Binding (SB) model, much easier to treat both theoretically and computationally, and extensively used to characterize the ionization properties of PE.
View Article and Find Full Text PDFExact Hidden Markovian Dynamics in Quantum Circuits.
Phys Rev Lett
October 2024
Institute for Advanced Study, Tsinghua University, Beijing 100084, People's Republic of China.
Characterizing nonequilibrium dynamics in quantum many-body systems is a challenging frontier of physics. In this Letter, we systematically construct solvable nonintegrable quantum circuits that exhibit exact hidden Markovian subsystem dynamics. This feature thus enables accurately calculating local observables for arbitrary evolution time.
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