Publications by authors named "Li-Xin Qi"

To explore the formation mechanism of the ozone (O) and emission reduction strategy in a northwestern city, an extensive field campaign was conducted in summertime in 2021 in Yining City, in which the 0-D box model incorporating the latest explicit chemical mechanism (MCMv3.3.1) was applied for the first time to quantify the O-NO-VOCs sensitivity and formulate a precise O control strategy in this city.

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  • Thin-layer chromatography (TLC) is crucial for quickly screening and identifying specific compounds, but its effectiveness is limited by the fixed properties of the stationary phase.
  • Researchers developed a new type of TLC using a photosensitive material called azo-PTES, which allows for changes in polarity when exposed to certain light wavelengths.
  • This innovation enables reversible separation based on light exposure, offering improved separation efficiency and the potential for multi-dimensional chromatography on a single plate.
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Soil microbial communities have resistance to environmental stresses and thus can maintain ecosystem functions such as decomposition, nutrient provisioning, and plant pathogen control. However, predominant factors driving community resistance of soil microbiome to heavy metal pollution stresses and ecosystem functional stability are still unclear, limiting our ability to forecast how soil pollution might affect ecosystem sustainability. Here, we conducted microcosm experiments to estimate the importance of soil microbiome in predicting community resistance to heavy metal mercury (Hg) stress in paired paddy and upland fields.

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To explore the characteristics and sources of PM in the core area of Ili River Valley in spring, a total of 140 PM samples were collected at six sampling sites during April 20-29, 2021, and 51 chemical components including inorganic elements, water-soluble ions, and carbon components were analyzed. The results showed that (PM) was at a low level during sampling, ranging from 9 μg·m to 35 μg·m. Si, Ca, Al, Na, Mg, Fe, and K were the most abundant elements, accounting for 12% of PM, indicating that PM was affected by the dust sources in spring.

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  • - The weak-value-amplification (WVA) scheme in precision metrology utilizes quantum destructive interference from pre- and post-selection states, while the joint WVA (JWVA) method offers even greater sensitivity, despite some technical challenges like misalignment errors.
  • - This work explores the difference-signal amplification (DSA) technique as a classical alternative to JWVA, demonstrating that comparable amplification effects can be achieved after erasing quantum coherence.
  • - A simplified expression for the amplified signal is developed along with a precision characterization, and the research discusses implementing post-selection in classical mixed states, suggesting practical applications for the DSA technique.
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The simultaneous observation and analysis of atmospheric particles on a regional scale is an important approach to developing control strategies for air pollution. To study the spatial distribution characteristics of particulate matter and water-soluble inorganic ions in the Ili Valley Urban agglomeration, PM and PM samples were synchronously collected from July 19 to July 29, 2021 in Yining City and the surrounding three counties, and then nine types of water-soluble inorganic ions (WSIIs) were analyzed. The spatial distribution characteristics, existence form of WSIIs, and influencing factors were discussed in depth.

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  • Soil pollution, particularly from heavy metals like mercury (Hg), significantly impacts biodiversity and ecosystem health, yet there's limited understanding of how soil microorganisms react to it.
  • Research in 47 pairs of paddy and upland fields revealed that protistan communities (a type of soil microorganism) showed more drastic changes in response to Hg pollution compared to bacteria and fungi, indicating their sensitivity to soil contaminants.
  • Findings suggest that soil protists can serve as effective bioindicators for Hg pollution, providing crucial insights for evaluating contaminated farmland and promoting sustainable agricultural practices.
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Graves' Ophthalmopathy (GO) is an organ-specific autoimmune disease that is often characterized by infiltration of orbital tissues and is considered as the most common extra-thyroid manifestation of Graves' disease (GD). Although genetic susceptibility has been found to be critical for the phenotype of GO, the associated risk alleles in a single gene are generally insufficient to cause the disease. Accruing evidence has shown that epigenetic disorders can act as the potentially missing link between genetic risk and clinically significant disease development.

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Regrettably, conventional chromatographic columns have immutable polarity, resulting in requirements of at least two columns with polarity difference and sophisticated mechanical switching valves, which hinders the development of "micro-smart" multidimensional tandem chromatography. In this work, light-driven polarity switching was realized in a single capillary column based on the reversible - isomerization of 4-[3-(triethoxysilyl)propoxy]azobenzene as the stationary phase under light irradiation, with the change in dipole moment. As a result, the stationary phase offers precise and dynamic control of polarity based on the - azobenzene ratio, which depends on irradiation wavelength and time.

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This study aimed to explore the mechanism of Xiaoyao San(XYS) in the treatment of three diseases of liver depression and spleen deficiency, ie, depression, breast hyperplasia, and functional dyspepsia, and to provide a theoretical basis for the interpretation of the scientific connotation of "treating different diseases with the same method" of traditional Chinese medicines. Traditional Chinese medicine systems pharmacology database and analysis platform(TCMSP) was used to screen the active components of XYS which underwent principal component analysis(PCA) with the available drugs for these three diseases to determine the corresponding biological activities. The targets of XYS on depression, breast hyperplasia, and functional dyspepsia were obtained from GeneCards, TTD, CTD, and DrugBank databases.

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We solve the quasi-bound state-energy spectra and wavefunctions of an NPN-type graphene quantum dot under a perpendicular magnetic field. The evolution of the quasi-bound state spectra under the magnetic field is investigated using a Wentzel-Kramers-Brillouin approximation. In numerical calculations, we also show that the twofold energy degeneracy of the opposite angular momenta breaks under a weak magnetic field.

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  • - Danggui Buxue Decoction (DBD) is a traditional Chinese medicine used to treat anemia, but its exact mechanism of action was previously unclear; research showed DBD improved anemia in mice induced by certain treatments.
  • - By using advanced metabolomics and lipidomics techniques, researchers identified 26 metabolites linked to DBD's effects, with 17 of them being reversed by DBD and associated with important metabolic pathways like pyrimidine and glycerophospholipid metabolism.
  • - The study identified three metabolites—cytosine, uracil, and a specific phospholipid—as potential biomarkers for DBD's effectiveness, offering insights into the mechanisms behind traditional Chinese medicine treatments.
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Erectile dysfunction (ED) is a major complication of diabetes mellitus. is used as a traditional medicine for male impotence, but no systematic study has examined its effect on diabetes-associated ED. In this study, we investigated the effects of leaf extract (EULE) on restoring erectile function in streptozotocin (STZ)-induced diabetic rats model.

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  • The proposed scheme focuses on measuring the quantum state of photons in a cavity using quantum weak values, applicable to both solid-state circuits and atomic cavity QED systems.
  • This approach allows for direct access to superposition components in the Fock state basis, rather than relying on the traditional Wigner function in phase space.
  • Unlike conventional quantum state tomography, the method enables separate access to quantum states without needing global reconstruction, offering a significant advantage.
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  • The study explores how counting the spontaneous emissions of atoms in a non-Markovian environment (where past events influence future outcomes) reveals complex statistics that change with the time interval of detections.
  • It highlights that these emissions can lead to significant phenomena, like dynamical phase transitions, challenging the notion that they occur independently of detection.
  • The paper also briefly mentions potential experiments utilizing advanced optical cavity setups to investigate these behaviors further.
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Within the framework of Boltzmann equation, we present a k · p theory based study for the low-field mobilities of InSb nanowires (InSb NWs) with relatively large cross sectional sizes (with diameters up to 51.8 nm). For such type of large size nanowires, the intersubband electron-phonon scattering is of crucial importance to affect the scattering rate and then the mobility.

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  • * Shows that this supercurrent behaves unexpectedly, significantly differing from what’s observed in standard superconducting junctions with quantum dots.
  • * The findings could have important implications for future developments in Majorana-nanowire circuits and their potential applications.
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Owing to the high throughput and low cost, next generation sequencing has attracted much attention for SNP genotyping application for researchers. Here, we introduce a new method based on three-round multiplex PCR to precisely genotype SNPs with next generation sequencing. This method can as much as possible consume the equivalent amount of each pair of specific primers to largely eliminate the amplification discrepancy between different loci.

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Developing efficient framework for quantum measurements is of essential importance to quantum science and technology. In this work, for the important superconducting circuit-QED setup, we present a rigorous and analytic solution for the effective quantum trajectory equation (QTE) after polaron transformation and converted to the form of Stratonovich calculus. We find that the solution is a generalization of the elegant quantum Bayesian approach developed in arXiv:1111.

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In this work we revisit the important and controversial concept of quantum weak values, aiming to provide a simplified understanding to its associated physics and the origin of anomaly. Taking the Stern-Gerlach setup as a working system, we base our analysis on an exact treatment in terms of quantum Bayesian approach. We also make particular connection with a very recent work, where the anomaly of the weak values was claimed from the pure statistics in association with "disturbance" and "post-selection", rather than the unique quantum nature.

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In this work, the recently introduced quantum trajectory mean-field (QTMF) approach is implemented and employed to explore photodissociation dynamics of diazirinone (N2CO), which are based on the high-level ab initio calculation. For comparison, the photodissociation process has been simulated as well with the fewest-switches surface hopping (FSSH) and the ab initio multiple spawning (AIMS) methods. Overall, the dynamical behavior predicted by the three methods is consistent.

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  • The study revisits the concept of the spin-injected field effect transistor (spin-FET) using a lattice model and the recursive lattice Green's function approach to analyze its behavior.
  • Results from one-dimensional simulations show significant differences from the traditional Datta-Das model, leading to an enhanced understanding of spin-FET functioning.
  • The research also explores the impacts of inelastic scattering and lateral confinement on spin control, highlighting their importance for the performance of spin-FET devices.
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  • The text presents an improved method for quantum transport analysis that moves beyond traditional approximation techniques, specifically the second-order Born approximation.
  • By using an effective reduced propagator instead of the free Green's function in the self-energy diagram, this approach yields exact results for quantum transport in noninteracting systems across a range of voltage conditions.
  • Additionally, it effectively captures complex phenomena like the nonequilibrium Kondo effect and offers more comprehensive dynamic insights compared to the standard nonequilibrium Green's function method, making it useful for studying shot noise and counting statistics.
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We investigate the dynamic quantum tunneling between two attractors of a mesoscopic driven Duffing oscillator. We find that, in addition to inducing a remarkable quantum shift of the bifurcation point, the mesoscopic nature also results in a perfect linear scaling behavior for the tunneling rate with the driving distance to the shifted bifurcation point.

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  • - Quantum measurement affects the system being measured, leading to dephasing and relaxation effects.
  • - The paper discusses solid-state qubit measurement using a mesoscopic detector and highlights an alternative backaction called renormalization.
  • - Renormalization is often ignored in quantum measurement theory, but this paper suggests it may be significant in certain situations.
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