Publications by authors named "Fan Shi"

Data from multimodalities bring complementary information for deep learning-based medical image classification models. However, data fusion methods simply concatenating features or images barely consider the correlations or complementarities among different modalities and easily suffer from exponential growth in dimensions and computational complexity when the modality increases. Consequently, this article proposes a subspace fusion network with tensor decomposition (TD) to heighten multimodal medical image classification.

View Article and Find Full Text PDF

While recent debiasing methods for Scene Graph Generation (SGG) have shown impressive performance, these efforts often attribute model bias solely to the long-tail distribution of relationships, overlooking the more profound causes stemming from skewed object and object pair distributions. In this paper, we employ causal inference techniques to model the causality among these observed skewed distributions. Our insight lies in the ability of causal inference to capture the unobservable causal effects between complex distributions, which is crucial for tracing the roots of model bias.

View Article and Find Full Text PDF

Anoectochilus roxburghii is a high-value plant resource for nutraceutical efficacy and medicinal applications, among which kinsenoside is recognized as the main bioactive glycoside. However, the anti-aging and anti-Alzheimer's disease (AD) activities of kinsenoside have long been neglected. The objective of this study was to investigate the influences of kinsenoside on aging and amyloid-β (Aβ) proteotoxicity and underlying molecular mechanisms in Caenorhabditis elegans (C.

View Article and Find Full Text PDF

Mitochondrial heat shock proteins and co-chaperones play crucial roles in maintaining proteostasis by regulating unfolded proteins, usually without specific target preferences. In this study, we identify a DNAJC-type co-chaperone: T cell activation inhibitor, mitochondria (TCAIM), and demonstrate its specific binding to α-ketoglutarate dehydrogenase (OGDH), a key rate-limiting enzyme in mitochondrial metabolism. This interaction suppresses OGDH function and subsequently reduces carbohydrate catabolism in both cultured cells and murine models.

View Article and Find Full Text PDF

The DNA-sensing protein cGAS plays a pivotal role in the innate immune response and pathogenesis of various diseases. DNA triggers liquid-liquid phase separation (LLPS) and enhances the enzymatic activity of cGAS. However, the regulatory mechanisms of the disordered N terminus remain unclear.

View Article and Find Full Text PDF

This study aimed to investigate the expression of glucagon-like peptide 1 receptor (GLP-1R) in the lacrimal gland and explore the effects of topical application of GLP-1R agonist on lacrimal gland function in a murine model of type 1 diabetes. Tear secretion was evaluated using phenol red threads, RNA sequencing was used to explore gene expression profiles associated with hyperglycemia-induced lacrimal gland injuries, and histologic analysis was conducted to evaluate the degree of damage. The expression of GLP-1R in the lacrimal gland was first identified, and a down-regulation trend associated with diabetes was observed.

View Article and Find Full Text PDF

Fe single-atom and Fe cluster-coupled N, S co-doped carbon nanomaterials (Fe-FeO-NSC) were prepared through a two-step high-temperature pyrolysis process using Gelidium corneum enriched with C, Fe, O, N, and S as precursors. The analysis by aberration-corrected scanning transmission electron microscopy and X-ray absorption spectroscopy revealed the presence of single-atom Fe in Fe-N coordination structures, along with small clusters as Fe-O-coordinated FeO. Single-atom Fe in the form of Fe/Fe provides more electrocatalytic active sites, which synergistically accelerates the charge migration process in the assembly of Fe-FeO-NSC with FeO clusters.

View Article and Find Full Text PDF

The discrepancy in the photoresponse characteristics between photodetectors (PDs) and photosynapses is posing a challenge for integrating the two functions into a single device. In this work, a photodetector integrated with neuromorphic capabilities is demonstrated. Under the joint action of the photovoltaic effect and photoconductive effect, the proposed device can switch between the photodetector and photosynapse by simply altering the polarity of bias voltage.

View Article and Find Full Text PDF
Article Synopsis
  • This paper examines how well a 100 Gb/s coherent passive optical network (PON) can handle laser phase noise using distributed feedback (DFB) lasers as local oscillators.
  • The study employs digitally subcarrier-multiplexed (DSCM) signals generated with Alamouti encoding, showing strong performance with power budgets of 34.2 dB and 33.9 dB over a 25 km fiber link, depending on the type of laser used.
  • Advanced digital signal processing techniques are utilized for phase noise compensation and frequency offset estimation, highlighting the importance of low-pass filter settings and pre-equalization for optimal system performance.
View Article and Find Full Text PDF

Background: Associations between exposure to single metals and cognitive impairment or related outcomes have been reported in many previous studies. However, co-exposure to more than one metal is common situation. In recent years, studies on the effects of exposure to multiple metals on cognitive impairment or related outcomes have increased, but remain very limited, with a focus on populations with occupational exposure to metals, children, and adolescents.

View Article and Find Full Text PDF
Article Synopsis
  • The study focuses on the trace amine-associated receptor 1 (TAAR1), which recognizes trace amines like β-phenylethylamine and methamphetamine in the brain and is linked to disorders such as schizophrenia and substance abuse.
  • Researchers determined the structure of the human TAAR1-G protein complex with methamphetamine and explored how TAAR1 selectively binds to different ligands through functional studies and molecular dynamics simulations.
  • The findings highlight a hydrophobic core in the receptor's transmembrane helices that activates TAAR1, providing insights for developing new treatments for substance abuse and various neurological disorders.
View Article and Find Full Text PDF

Sedimentation solid-state NMR is a novel method for sample preparation in solid-state NMR (ssNMR) studies. It involves the sedimentation of soluble macromolecules such as large protein complexes. By utilizing ultra-high centrifugal forces, the molecules in solution are driven into a high-concentrated hydrogel, resulting in a sample suitable for solid-state NMR.

View Article and Find Full Text PDF

Time-of-flight diffraction (ToFD) is a widely used ultrasonic nondestructive evaluation (NDE) method for locating and characterizing rough defects, with high accuracy in sizing smooth cracks. However, naturally grown defects often have irregular surfaces, complicating the received tip diffraction waves and affecting the accuracy of defect characterization. This article proposes a self-attention (SA) deep learning method to interpret the ToFD A-scan signals for sizing rough defects.

View Article and Find Full Text PDF

Circular bacteriocins are known for their structural stability and effective antimicrobial properties, positioning them as potential natural food preservatives. However, their widespread application is impeded by restricted availability. This research developed a total biosynthesis platform for circular bacteriocins, with a focus on AS-48 by involving recombinant production of the linear precursor in , followed by enzymatic cyclization of the precursor into cyclic AS-48 using the ligase butelase-1 .

View Article and Find Full Text PDF

Glucagon receptor (GCGR) is a class B1 G-protein-coupled receptor that plays a crucial role in maintaining human blood glucose homeostasis and is a significant target for the treatment of type 2 diabetes mellitus (T2DM). Currently, six small molecules (Bay 27-9955, MK-0893, MK-3577, LY2409021, PF-06291874, and LGD-6972) have been tested or are undergoing clinical trials, but only the binding site of MK-0893 has been resolved. To predict binding sites for other small molecules, we utilized both the crystal structure of the GCGR and MK-0893 complex and dynamic conformations.

View Article and Find Full Text PDF

Intrahepatic cholangiocarcinoma (ICC) is the second most common primary liver cancer and its prognosis remains poor. Although growing numbers of studies have verified the involvement of circular RNAs (circRNAs) in various cancer types, their specific functions in ICC remain elusive. Herein, a circRNA, circUGP2 is identified by circRNA sequencing, which is downregulated in ICC tissues and correlated with patients' prognosis.

View Article and Find Full Text PDF

Free-living amoebae (FLA) are prevalent in nature and man-made environments, and they can survive in harsh conditions by forming cysts. Studies have discovered that some FLA species are able to show pathogenicity to human health, leading to severe infections of central nervous systems, eyes, etc. with an extremely low rate of recovery.

View Article and Find Full Text PDF

Purpose: Lupus-like chronic graft-versus-host disease (cGVHD) has been previously described, but the ocular findings have not been elucidated. Recipient mice in a lupus-like cGVHD model manifested notable and persistent ocular surface phenotypes. Herein, we further explored immunopathogenic mechanisms underlying these ocular phenotypes.

View Article and Find Full Text PDF

In this paper, a new method for rotational angle and speed measurements is proposed by integrating a GaN optoelectronic chip with a stepped disc. The optoelectronic chip that integrates a light-emitting diode (LED) and a photodiode (PD) is fabricated by wafer-level microfabrication. The disc is designed with a spiral staircase shape, and has increasing thickness distribution along the circumferential direction.

View Article and Find Full Text PDF

Integrating optoelectronic devices with various functions into a monolithic chip is a popular research frontier. The top-down integration scheme on silicon-based III-nitride wafers has unique advantages. A monolithic III-nitride on-chip system with lighting source, electrical absorption modulator, waveguide and photodetector with the same structure were designed and fabricated to discover the asymmetry of photon emission and absorption in quantum well diode.

View Article and Find Full Text PDF

The gallium nitride (GaN) integrated optical transceiver chip based on multiple quantum wells (MQW) structure exhibits great promise in the fields of communication and sensing. In this Letter, the effect of ambient temperature on the performance of GaN-integrated optical transceiver chips including a blue MQW light-emitting diode (LED) and a MQW photodiode (PD) is comprehensively studied. Temperature-dependent light-emitting and current-voltage characteristics of the blue MQW LEDs are measured with the ambient temperature ranging from -70°C to 120°C.

View Article and Find Full Text PDF
Article Synopsis
  • Ultrasonic bulk wave inspection is difficult for complex-shaped safety-critical components like turbine blades, as traditional phased array probes struggle to attach to irregular surfaces for imaging.
  • A new method utilizing elastic diffuse waves generated by active piezoelectric actuators and captured by a laser vibrometer is proposed for internal defect imaging.
  • The method involves a full matrix capture of array signals analyzed through numerical simulations and further tested with experiments using a turbine blade-like structure to assess its effectiveness.
View Article and Find Full Text PDF

DNA topoisomerase II alpha (TOP2A) expression, gene alterations, and enzyme activity have been studied in various malignant tumors. Abnormal elevation of TOP2A expression is considered to be related to the development of non-small cell lung cancer (NSCLC). However, its association with tumor metastasis and its mode of action remains unclear.

View Article and Find Full Text PDF

Background: PD-L1 overexpression is commonly observed in various malignancies and is strongly correlated with poor prognoses for cancer patients. Moreover, PD-L1 has been shown to play a significant role in promoting angiogenesis and epithelial-mesenchymal transition (EMT) processes across different cancer types.

Methods: The relationship between PD-L1 and vasculogenic mimicry as well as epithelial-mesenchymal transition (EMT) was explored by bioinformatics approach and immunohistochemistry.

View Article and Find Full Text PDF

A PHP Error was encountered

Severity: Warning

Message: fopen(/var/lib/php/sessions/ci_sessiont01k488pmnacequnrgi6hsube8p6jd8d): Failed to open stream: No space left on device

Filename: drivers/Session_files_driver.php

Line Number: 177

Backtrace:

File: /var/www/html/index.php
Line: 316
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: session_start(): Failed to read session data: user (path: /var/lib/php/sessions)

Filename: Session/Session.php

Line Number: 137

Backtrace:

File: /var/www/html/index.php
Line: 316
Function: require_once