Publications by authors named "Denghui Li"

Copper matrix composites (CMCs) synergistically reinforced with rare earth oxides (ReO) and TiC were prepared using a powder metallurgy process with vacuum hot-pressing and sintering technology, aiming to explore new ways to optimize the properties of composites. Through this innovative approach, we propose a new solution strategy and idea for the difficult problem of mutual constraints between electrical and mechanical properties faced by traditional dual-phase reinforced Cu-matrix composites. Meanwhile, the modulation mechanism of ReO in CMCs and the electrical and mechanical properties of the composites were investigated.

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Sediment plays a pivotal role in deep-sea ecosystems by providing habitats for a diverse range of microorganisms and facilitates the cycling processes of carbon, sulfur and nitrogen. Beyond the normal seafloor (NS), distinctive geographical features such as cold seeps (CS) and hydrothermal vent (HV) are recognized as life oases harboring highly diverse microbial communities. A global atlas of microorganisms can reveal the notable association between geological processes and microbial colonization.

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Article Synopsis
  • Bacterial wilt disease, caused by a soil-borne pathogen, significantly impacts crop economies globally.
  • The study isolated strain MLY102 from a diseased tobacco stalk and conducted a series of genomic analyses, revealing its ability to utilize certain carbon sources and details of its genomic structure.
  • MLY102's genome consists of 5.72 Mb and includes unique genes, indicating it has specific traits that could aid in developing strategies for managing bacterial wilt disease.
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A deep understanding of non-smooth dynamics of vehicle systems, particularly with dry friction damping offer valuable insights into the design and optimization of railway vehicle systems, ultimately enhancing the safety and reliability of railway operations. In this paper, the two-parameter dynamics of a non-smooth railway wheelset system incorporating dry friction damping are investigated. The effect of the crucial parameters on the complexity of the evolution process is comprehensively exposed by identifying different dynamic responses in the two-parameter plane.

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Antibiotics, prevalent in aquatic ecosystems, pose a grave threat to human health and the ecological well-being. This paper performed a case study on Dafeng River Basin in southern China. Specifically, techniques including positive matrix factorization (PFM) and Monte-Carlo simulation were employed to comprehensively investigate the spatial variations, possible sources, and ecological risks of antibiotics in four groups: sulfonamides (SAs), macrolides (MLs), quinolones (QNs), and tetracyclines (TCs).

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  • Scientists found a lot of tiny living things called microbes in the ocean, gathering over 43,000 genomes to study.
  • They discovered new tools that could help fight bacteria, like a special CRISPR system and some substances that kill germs.
  • This research shows how the variety of microbes in the ocean can help us create new technology and medicine that can benefit us in the future.
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Liver cancer ranks as the third leading cause of cancer-related mortality worldwide, predominantly in the form of hepatocellular carcinoma (HCC). Conventional detection and treatment approaches have proven inadequate for addressing the elevated incidence and mortality rates associated with HCC. However, a significant body of research suggests that combating HCC through the induction of ferroptosis is possible.

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  • Idiopathic scoliosis is a condition affecting children's physical and mental health, with a study conducted in Yunnan Province, China, to determine its prevalence and associated miRNA profiles.
  • The study screened 84,460 students from ages 7 to 19, finding an overall prevalence of 1.10%, with higher rates in females (1.32%) than in males (0.87%), peaking at age 13.
  • Genetic analysis revealed 56 upregulated and 153 downregulated exosome-derived miRNAs in patients with idiopathic scoliosis, which could help understand the condition better and potentially lead to new diagnostic methods.
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Among the various reinforcement phases available in Cu-based composites, the unique layered structure and easy diffusion of A-layer atoms make MAX phases more suitable for reinforcing a copper matrix than others. In this study, Cu-coated TiAlC particles (Cu@TiAlC) were prepared through electroless plating, and Cu@TiAlC/Cu composites were fabricated via vacuum hot-press sintering. The phase composition and microstructure of both Cu@TiAlC powder and composites were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM).

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Heme is the prosthetic group for cytochrome that exists in nearly all living organisms and serves as a vital component of human red blood cells (RBCs). Tunable optical nonlinearity in suspensions of RBCs has been demonstrated previously, however, the nonlinear optical response of a pure heme (without membrane structure) solution has not been studied to our knowledge. In this work, we show optical nonlinearity in two common kinds of heme (i.

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A significant amount of organic carbon is transported in dissolved form from soils to coastal oceans via inland water systems, bridging land and ocean carbon reservoirs. However, it has been discovered that the presence of terrigenous dissolved organic carbon (tDOC) in oceans is relatively limited. Therefore, understanding the fates of tDOC in coastal oceans is essential to account for carbon sequestration through land ecosystems and ensure accurate regional carbon budgeting.

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Lineage-wise physiological activities of plankton communities in the ocean are important but challenging to characterize. Here, we conducted whole-assemblage metatranscriptomic profiling at continental shelf and slope sites in the South China Sea to investigate carbon fixation potential in different lineages. expression, the proxy of Calvin carbon fixation (CCF) potential, was mainly contributed by Bacillariophyta, Chlorophyta, Cyanobacteria, and Haptophyta, which was differentially affected by environmental factors among lineages.

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  • A new bacterium strain QS115 was discovered in deep-sea sediment from the South China Sea, showing strong genetic similarities to another strain, W43, but enough differences to classify it as a new species.
  • Strain QS115 is characterized as a Gram-negative, rod-shaped bacterium that thrives at low temperatures (10°C) and specific conditions (pH 7.5, 2% NaCl).
  • Key components of QS115 include unique fatty acids, a specific respiratory quinone, and distinct polar lipids, leading to its classification as a novel species in its genus with the proposed name sp. nov.
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  • Tepidibacter sp. SWIR-1 is a newly identified anaerobic bacterium from a deep-sea hydrothermal vent on the Southwest Indian Ridge, showing traits like being mesophilic and endospore-forming.
  • The complete genome sequence of SWIR-1 includes a circular chromosome of over 4 million nucleotides and a plasmid, with a total of 3,861 protein-coding genes identified.
  • This genome reveals that SWIR-1 possesses unique adaptations, including more genes for spore germination and chemotaxis compared to other known Tepidibacter species, highlighting its ability to thrive in extreme environments.
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  • Research on spinal cord stimulation (SCS) and deep brain stimulation (DBS) for disorders of consciousness (DoC) is growing, but evidence on their effectiveness and safety is still limited due to various study flaws.
  • A systematic review analyzed 20 studies involving a total of 608 patients, revealing that SCS has an overall effectiveness rate of 37% for DoC, while DBS has a higher rate of 40%.
  • Adverse event rates were found to be 8.1% for SCS and 18.2% for DBS, indicating that while both treatments show potential benefits, safety concerns exist.
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In this paper, the stability and Bautin bifurcation of a four-wheel-steering (4WS) vehicle system, by considering driver steering control, are investigated. By using the central manifold theory and projection method, the first and second Lyapunov coefficients are calculated to predict the type of Hopf bifurcation of the vehicle system. The topological structure of Bautin bifurcation, a degenerate Hopf bifurcation of the 4WS vehicle system, is presented in parameter space, and it reveals the dynamics of the vehicle system of different choices of control parameters.

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  • Bioluminescence in deep-sea bacteria plays a key role in protecting against oxidative and UV stresses, but its impact on adaptation to high hydrostatic pressure (HHP) is not well understood.
  • A study compared a non-luminescent mutant strain of the bacterium ANT-2200 with its luminescent counterpart to assess pressure tolerance and oxidative stress response.
  • Findings indicated that bioluminescence acts as a crucial antioxidant system, helping bacteria adapt to the extreme deep-sea environment by managing oxidative stress from HHP.
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Objective: Personalized stimulation is key to optimizing the outcomes of deep brain stimulation (DBS) for refractory obsessive-compulsive disorder (OCD). However, the contacts in a single conventional electrode cannot be programmed independently, which may affect the therapeutic efficacy of DBS for OCD. Therefore, a novel designed electrode and implantable pulse generator (IPG) that could achieve differential stimulation parameters for different contacts was implanted into the nucleus accumbens (NAc) and anterior limb of the internal capsule (ALIC) of a cohort of patients with OCD.

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Intrusion detection systems can detect potential attacks and raise alerts on time. However, dimensionality curses and zero-day attacks pose challenges to intrusion detection systems. From a data perspective, the dimensionality curse leads to the low efficiency of intrusion detection systems.

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Longan yield estimation is an important practice before longan harvests. Statistical longan yield data can provide an important reference for market pricing and improving harvest efficiency and can directly determine the economic benefits of longan orchards. At present, the statistical work concerning longan yields requires high labor costs.

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Background: Bivalves have independently evolved a variety of symbiotic relationships with chemosynthetic bacteria. These relationships range from endo- to extracellular interactions, making them ideal for studies on symbiosis-related evolution. It is still unclear whether there are universal patterns to symbiosis across bivalves.

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Nonsmooth systems are widely encountered in engineering fields. They have abundant dynamical phenomena, including some results on the complex dynamics in such systems under quasiperiodically forced excitations. In this work, we consider a quasiperiodically forced piecewise linear oscillator and show that strange nonchaotic attractors (SNAs) do exist in such nonsmooth systems.

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Litchi flowering management is an important link in litchi orchard management. Statistical litchi flowering rate data can provide an important reference for regulating the number of litchi flowers and directly determining the quality and yield of litchi fruit. At present, the statistical work regarding litchi flowering rates requires considerable labour costs.

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With the increasing global aging population, the health of the elderly has become a global concern. Accidental falls, as one of the major causes of health and safety issues affecting the elderly, can cause serious hazards. In this paper, a fall detection system is proposed to be able to deliver timely information after a fall.

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The magnetic nanochain-like material has been regards as one of the most promising electromagnetic (EM) absorbing material but remains a challenging. Herein, magnetic chain-like ferrite (included FeO CoFeO and NiFeO) are successfully produced through a general solvothermal method, using PVP as the structural-liking agent. Experimental results confirm the ultimate sample possess a 3-dimensional chain-like structure which are constructed by numerous ferrite's nanoparticles with ~60 nm in diameter.

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