1.257 hasil untuk "LU Ping"
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Theory of Fractional-Polynomial Powered Descent Guidance
The notion and the theory of constructing planetary powered descent guidance laws based on fractional polynomials are introduced. Along the way a new perspective to the classical Apollo powered descent guidance designs is gained. As a foundation of this work, a theory is first developed on how to…
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Structural Characteristics of the Evolution of a Stable Low-motion Southwest Vortex and Its Relationship with Heavy Rainfall
This paper is mainly about the typical stable, low-motion, long-life warm southwest vortex rainstorm process on July 26-27, 2023.Based on the analytical field data of the Southwest Regional Model (SWC) and the precipitation data of weather stations, the paper studies the evolution of the horizontal…
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Research progress on collagenous gastritis
Collagenous gastritis （CG） is a rare disease characterized by a zone of collagen deposits of > 10 μm in thickness under the gastric mucosal epithelium with inflammatory cell infiltration in the lamina propria. The pathogenesis of CG is still unclear， which may be related to many factors， such as…
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Evaluation of Urban Vitality in Shandong Based on Multi-source Data
This paper focuses on the new problem of urban vitality development, and designs 32 link indicators from 6 dimensions, including economy, talent, innovation, industry, people’s livelihood and international, to measure urban vitality by using comprehensive evaluation method. The results of the study…
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Fault prediction method of distributed sensor networks system
It is difficult to use a general method to implement fault prediction of distributed sensor networks, a kind of fault prediction method based on knowledge discovery was put forward. Firstly, the method establishes mathematical description system of time information, in order to realize the…
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Maneuvering the Internal Porosity and Surface Morphology of Electrospun Polystyrene Yarns by Controlling the Solvent and Relative Humidity
This article presents a simple and reliable method for generating polystyrene (PS) yarns composed of bundles of nanofibrils by using a proper combination of solvent and relative humidity. We elucidated the mechanism responsible for the formation of this new morphology by systematically…
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Novel Nanostructures of Rutile Fabricated by Templating against Yarns of Polystyrene Nanofibrils and Their Catalytic Applications
This article describes a facile approach to the synthesis of rutile nanostructures in the form of porous fibers or bundles of nanotubes by maneuvering the surface wettability of yarns made of polystyrene nanofibrils. Specifically, hierarchically porous fibers were obtained by hydrolyzing titanium…
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Transcriptome Profiles of Alternaria oxytropis Provides Insights into Swainsonine Biosynthesis
Swainsonine (SW) is a toxic alkaloid biosynthesized by the endophytic fungus Alternaria oxytropis in Oxytropis glabra. The biosynthetic pathway of SW is poorly understood. Saccharopine reductase/dehydrogenase of fungus plays an important role in this pathway. The gene knocked out mutant M1 in A…
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The Sampling Design of the China Family Panel Studies (CFPS)
The China Family Panel Studies (CFPS) is an on-going, nearly nationwide, comprehensive, longitudinal social survey that is intended to serve research needs on a large variety of social phenomena in contemporary China. In this paper, we describe the sampling design of the CFPS sample for its 2010…
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Electrospun Nanofibers: Shaping the Future of Controlled and Responsive Drug Delivery
Electrospun nanofibers for drug delivery systems (DDS) introduce a revolutionary means of administering pharmaceuticals, holding promise for both improved drug efficacy and reduced side effects. These biopolymer nanofiber membranes, distinguished by their high surface area-to-volume ratio…
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Dietary caffeine and its negative link to serum Klotho concentrations: evidence from the National Health and Nutrition Examination Survey
BACKGROUND: This is the initial investigation assessing the association between caffeine consumption through diet and circulating Klotho concentrations, with Klotho being recognized as a key biomarker of healthspan and aging. METHODS: This cross-sectional analysis utilized data from 11,169 adults…
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Engineering pH and Temperature-Triggered Drug Release with Metal-Organic Frameworks and Fatty Acids
This study reports the successful synthesis of core-shell microparticles utilizing coaxial electrospray techniques, with zeolitic imidazolate framework-8 (ZIF-8) encapsulating rhodamine B (RhB) in the core and a phase change material (PCM) shell composed of a eutectic mixture of lauric acid (LA)…
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Designing Dual-Responsive Drug Delivery Systems: The Role of Phase Change Materials and Metal–Organic Frameworks
Stimuli-responsive drug delivery systems (DDSs) offer precise control over drug release, enhancing therapeutic efficacy and minimizing side effects. This review focuses on DDSs that leverage the unique capabilities of phase change materials (PCMs) and metal–organic frameworks (MOFs) to achieve…
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Enantioselective [3+2]-cycloaddition of 2,3-disubstituted cyclobutenones: vicinal quaternary stereocenters construction and skeletal functionalization
Cycloaddition is a fundamental transformation, featuring the assembly of complex cyclic molecules with multiple stereocenters. We report here a silver-catalyzed [3+2]-cycloaddition of 2,3-disubstituted cyclobutenones with an array of azomethine ylide precursors iminoesters, furnishing azabicycles…
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Survey on Spiking Neural P Systems with Rules on Synapses
Membrane systems are a class of bio-inspired computing models,inspired by the structure and function of cells,tissue,organ and bio-systems.Spiking neural P systems with rules on synapses(SNPRS) are a type of membrane systems,inspired by the way that neurons communicate information.In SNPRS,each…
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Research progress on neural mechanisms of primary insomnia by MRI
In recent years, more and more researches focused on the neural mechanism of primary insomnia (PI), especially with the development and application of MRI, and researches of brain structure and function related with primary insomnia were more and more in-depth. According to the hyperarousal…
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(E)-Methyl 3-(3,5-dibromo-2-hydroxybenzylidene)carbazate
The title compound, C9H8Br2N2O3, crystallizes with two very similar independent molecules in the asymmetric unit, each of which adopts a trans configuration with respect to the C=N bond. Intramolecular O—H...N hydrogen bonds are observed in each independent molecule. In the crystal structure…
Juga tersedia di: PubMed Central
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The SWI/SNF tumor suppressor complex
Nucleosomes, octamers of histones wrapped in 147 bp of DNA, are the basic unit of chromatin. In eukaryotic cells, the placement of nucleosomes along the genome is highly organized, and modulation of this ordered arrangement contributes to regulation of gene expression. The SWI/SNF complex utilizes…
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Misdiagnosis of primary intimal sarcoma of the pulmonary artery as chronic pulmonary embolism: A case report
BACKGROUND: Primary intimal sarcoma of the pulmonary artery is a rare malignant tumor originating from the pulmonary artery, which has a low incidence rate and is easily misdiagnosed as pulmonary embolism. There is no standard protocol for the treatment of primary intimal sarcoma of the pulmonary…
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