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Facility-Level Associations Between Use of a Digital Health Platform for Voluntary Counseling and Testing and HIV Testing Outcomes in the Urban Primary Health Care Centers of Guangzhou, China: Cross-Sectional Study. [PDF]
J Med Internet ResChen Y +16 more
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Privacy-preserving Cooperative Positioning
ION GNSS+, The International Technical Meeting of the Satellite Division of The Institute of Navigation, 2020We address the issue of user privacy in the context of “collaborative” positioning, wherein information is passed between and processed by multiple cooperative agents with the goal of achieving high levels of positioning accuracy. In particular, we evaluate the feasibility of applying a layer of encryption to a linear least squares (LS) algorithm for ...
Hernandez, Guillermo +2 more
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Positivity-Preserving Schemes in Multidimensions
SIAM Journal on Scientific Computing, 2000The performance of the MUSCL-Hancock upwind scheme is examined on problems of two-dimensional advection. It is found that when the advection direction is skewed relative to the mesh, most discrete total variation diminishing (TVD) limiters give rise to large spurious oscillations near discontinuities.
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Positivity Preservation Properties of the Rantzer Multipliers
IEEE Transactions on Automatic Control, 2011The Rantzer multipliers are known to preserve the positivity of certain aberrations of memoryless monotone positive nonlinearities. We show that if the nonlinearity input is constrained to be positive valued for all time instants, these multipliers are positivity preserving for a larger class of nonlinearities.
Vishwesh V. Kulkarni 0001 +2 more
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Positivity Preserving Semigroups and Positivity Preserving Coercive Forms
2018We recall the idea of Ma and Rockner (Canad. J. Math., 47:817–840, 1995, [13]) and report some further progress along the line of the research initiated by Ma and Rockner (Canad. J. Math., 47:817–840, 1995, [13]). The further progress includes the technique of \(h\hat{h}\)-transformations for positivity preserving semigroups, and includes our recent ...
Xian Chen, Zhi-Ming Ma, Xue Peng
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Positivity-preserving H∞ model reduction for positive systems.
Autom., 2011This paper is concerned with the model reduction of positive systems. For a given stable positive system, our attention is focused on the construction of a reduced-order model in such a way that the positivity of the original system is preserved and the error system is stable with a prescribed H ∞ performance. Based upon a system augmentation approach,
Ping Li 0004 +3 more
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