7,258 research outputs found
Metric adjusted skew information: Convexity and restricted forms of superadditivity
We give a truly elementary proof of the convexity of metric adjusted skew
information following an idea of Effros. We extend earlier results of weak
forms of superadditivity to general metric adjusted skew informations.
Recently, Luo and Zhang introduced the notion of semi-quantum states on a
bipartite system and proved superadditivity of the Wigner-Yanase-Dyson skew
informations for such states. We extend this result to general metric adjusted
skew informations. We finally show that a recently introduced extension to
parameter values of the WYD-information is a special case of
(unbounded) metric adjusted skew information.Comment: An error in the literature is pointed ou
Interval uncertain analysis of active hydraulically interconnected suspension system
© SAGE Publications Ltd. Uncertainty exists in many industry fields and needs to be dealt properly to avoid unexpected failure. This article proposes a new approach to deal with the uncertain problems encountered by the mathematical modeling of an active hydraulically interconnected suspension system. As the need for both riding comfort and the controllability is soaring nowadays, the traditional passive and semi-active suspension system could barely keep up with the pace, and the proposed active hydraulic system could be one of the solutions. In order to deal with the uncertain factors in the hydraulic system, an interval analysis method for the dynamic responses of nonlinear systems with uncertain-but-bounded parameters using Chebyshev polynomial series is introduced. The comparisons conducted in this article demonstrate the accuracy and computational efficiency of the proposed uncertain problem solver and reveal the influences of uncertain parameters in fluid and mechanical components on the dynamic responses of active hydraulically interconnected suspension
Spectral analysis of Gene co-expression network of Zebrafish
We analyze the gene expression data of Zebrafish under the combined framework
of complex networks and random matrix theory. The nearest neighbor spacing
distribution of the corresponding matrix spectra follows random matrix
predictions of Gaussian orthogonal statistics. Based on the eigenvector
analysis we can divide the spectra into two parts, first part for which the
eigenvector localization properties match with the random matrix theory
predictions, and the second part for which they show deviation from the theory
and hence are useful to understand the system dependent properties. Spectra
with the localized eigenvectors can be characterized into three groups based on
the eigenvalues. We explore the position of localized nodes from these
different categories. Using an overlap measure, we find that the top
contributing nodes in the different groups carry distinguished structural
features. Furthermore, the top contributing nodes of the different localized
eigenvectors corresponding to the lower eigenvalue regime form different
densely connected structure well separated from each other. Preliminary
biological interpretation of the genes, associated with the top contributing
nodes in the localized eigenvectors, suggests that the genes corresponding to
same vector share common features.Comment: 6 pages, four figures (accepted in EPL
Transverse Mode Multi-Resonant Single Crystal Transducer
A transducer is disclosed that includes a multiply resonant composite, the composite having a resonator bar of a piezoelectric single crystal configured in a d(sub 32) transverse length-extensional resonance mode having a crystallographic orientation set such that the thickness axis is in the (110) family and resonance direction is the (001) family
Identifying the orbital angular momentum of light based on atomic ensembles
We propose a scheme to distinguish the orbital angular momentum state of the
Laguerre-Gaussian (LG) beam based on the electromagnetically induced
transparency modulated by a microwave field in atomic ensembles. We show that
the transverse phase variation of a probe beam with the LG mode can be mapped
into the spatial intensity distribution due to the change of atomic coherence
caused by the microwave. The proposal may provide a useful tool for studying
higher-dimensional quantum information based on atomic ensembles.Comment: 4 pages, 4 figure
Can Chinese Medicine Be Used for Prevention of Corona Virus Disease 2019 (COVID-19)? A Review of Historical Classics, Research Evidence and Current Prevention Programs
Objective: Since December 2019, an outbreak of corona virus disease 2019 (COVID-19) occurred in
Wuhan, and rapidly spread to almost all parts of China. This was followed by prevention programs recommending
Chinese medicine (CM) for the prevention. In order to provide evidence for CM recommendations, we reviewed
ancient classics and human studies. Methods: Historical records on prevention and treatment of infections in
CM classics, clinical evidence of CM on the prevention of severe acute respiratory syndrome (SARS) and H1N1
influenza, and CM prevention programs issued by health authorities in China since the COVID-19 outbreak were
retrieved from different databases and websites till 12 February, 2020. Research evidence included data from
clinical trials, cohort or other population studies using CM for preventing contagious respiratory virus diseases.
Results: The use of CM to prevent epidemics of infectious diseases was traced back to ancient Chinese practice
cited in Huangdi's Internal Classic (Huang Di Nei Jing) where preventive effects were recorded. There were 3
studies using CM for prevention of SARS and 4 studies for H1N1 influenza. None of the participants who took CM
contracted SARS in the 3 studies. The infection rate of H1N1 influenza in the CM group was significantly lower than
the non-CM group (relative risk 0.36, 95% confidence interval 0.24–0.52; n=4). For prevention of COVID-19, 23
provinces in China issued CM programs. The main principles of CM use were to tonify qi to protect from external
pathogens, disperse wind and discharge heat, and resolve dampness. The most frequently used herbs included
Radix astragali (Huangqi), Radix glycyrrhizae (Gancao), Radix saposhnikoviae (Fangfeng), Rhizoma Atractylodis
Macrocephalae (Baizhu), Lonicerae Japonicae Flos (Jinyinhua), and Fructus forsythia (Lianqiao). Conclusions:
Based on historical records and human evidence of SARS and H1N1 influenza prevention, Chinese herbal
formula could be an alternative approach for prevention of COVID-19 in high-risk population. Prospective, rigorous
population studies are warranted to confirm the potential preventive effect of CM.
This is a post-peer-review, pre-copyedit version of an article published in Chinese Journal of Integrative Medicin
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