219 research outputs found
Alteration Detection of Tensor Dependence Structure via Sparsity-Exploited Reranking Algorithm
Tensor-valued data arise frequently from a wide variety of scientific
applications, and many among them can be translated into an alteration
detection problem of tensor dependence structures. In this article, we
formulate the problem under the popularly adopted tensor-normal distributions
and aim at two-sample correlation/partial correlation comparisons of
tensor-valued observations. Through decorrelation and centralization, a
separable covariance structure is employed to pool sample information from
different tensor modes to enhance the power of the test. Additionally, we
propose a novel Sparsity-Exploited Reranking Algorithm (SERA) to further
improve the multiple testing efficiency. The algorithm is approached through
reranking of the p-values derived from the primary test statistics, by
incorporating a carefully constructed auxiliary tensor sequence. Besides the
tensor framework, SERA is also generally applicable to a wide range of
two-sample large-scale inference problems with sparsity structures, and is of
independent interest. The asymptotic properties of the proposed test are
derived and the algorithm is shown to control the false discovery at the
pre-specified level. We demonstrate the efficacy of the proposed method through
intensive simulations and two scientific applications
A temperature independent driver for Mach-Zehnder modulators
This paper describes a fully differential inductorlesstemperature independent laser driver for a Mach-Zehndermodulator (MZM). The laser driver in this work exhibits robustnessin bandwidth and gain across the temperature range27oC to 135oC. This driver (fabricated using a 130nm CMOSprocess) can achieve a differential output voltage swing of up to4Vpp when driving a 50 Ohm Load at speeds of up to 12.5Gb/sacross a temperature range 27oC to 135oC
Natural products target glycolysis in liver disease
Mitochondrial dysfunction plays an important role in the occurrence and development of different liver diseases. Oxidative phosphorylation (OXPHOS) dysfunction and production of reactive oxygen species are closely related to mitochondrial dysfunction, forcing glycolysis to become the main source of energy metabolism of liver cells. Moreover, glycolysis is also enhanced to varying degrees in different liver diseases, especially in liver cancer. Therefore, targeting the glycolytic signaling pathway provides a new strategy for the treatment of non-alcoholic fatty liver disease (NAFLD) and liver fibrosis associated with liver cancer. Natural products regulate many steps of glycolysis, and targeting glycolysis with natural products is a promising cancer treatment. In this review, we have mainly illustrated the relationship between glycolysis and liver disease, natural products can work by targeting key enzymes in glycolysis and their associated proteins, so understanding how natural products regulate glycolysis can help clarify the therapeutic mechanisms these drugs use to inhibit liver disease
Genipin-crosslinked decellularized annulus fibrosus matrix/chitosan scaffolds for the culture of annulus fibrous-derived stem cells
- …