Search Results - Xin Song

By using the method of combinatorial group theory, the properties of primitives are found. By discussing different Jordan canonical forms and analyzing the properties of unipotent matrices, and by using computer software, the conditions that binary generated free groups which linear representation d...

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For the unipotent problem of binary-generated free groups, the new trace equations are obtained by intensive study of combinatorial properties of the primitive element of the binary-generated free groups. The resulting equations are resolved by using computer software, and the new determination cond...

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Aiming at the question whether the group generated by two unipotent matrices whose Jordan blocks are of order no more than five is a unipotent group, based on the fundamental definition of nilpotent matrix, we use the matrix logarithm tool to obtain some combinatorial properties of the generators of...

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The leaching process of copper in the polluted medium and the pollution risk to the underground environment under the conditions of acid rain (pH 5.02 ± 0.02), natural rain (pH 6.8 ± 0.02), and different rainfall (moderate rain, heavy rain, and rainstorm) were examined through simulated column exper...

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Different from the high gas and prominent mining areas in the middle east of China, the mining face of single thick and extra thick coal seam in the western mining area has a large amount of unloading gas and mainly originates from this coal seam, if the mining overburden unloading gas extraction dr...

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As power grids scale and aging assets edge toward obsolescence, grounding grid corrosion has become a critical vulnerability. Conventional diagnosis must fit high-dimensional electrical data to a physical model, typically yielding a nonlinear under-determined system fraught with computational burden...

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Colon adenocarcinoma is the third leading cause of cancer-related deaths across the world, developing novel and non-invasive diagnostic and prognostic biomarkers for the early-stage colon adenocarcinoma at molecular level is essential. In our study, RNA-sequencing was performed to identify the diffe...

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Farmers’ perceptions, beliefs, adaptive strategies, and barriers regarding climate change are critical to promoting sustainable ecosystems and societal stability. This paper is based on an extensive survey of 1 500 farmers and their households in Henan Province in China during 2013–2014. Henan is th...

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Summary: The nature of two-dimensional melting remains a matter of debate. Based on Langevin dynamics simulation, we present a surprising observation that the melting pathway of hard circular-particles/disks is relevant to the dynamical properties of particles. Using hard circular-particles/disks, w...

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ObjectiveTo investigate the relationship between tooth loss and the occurrence of esophageal cancer in a natural village in Wenfeng District, Anyang City, Henan Province. MethodsA prospective cohort study was conducted to observe the occurrence of tooth loss and esophageal cancer among the asymptoma...

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ObjectiveTo investigate the screening results and factors affecting abnormal detection rates among high-risk groups of esophageal cancer and to explore effective intervention measures. MethodsWe investigated and collected the information on gender, education level, age, marital status, symptoms of r...

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Summary: Background: Electronic patient-reported outcome (ePRO) systems have significant potential for providing individualized and continuous nutritional management for patients with cancer. However, adherence to ePRO-guided nutritional interventions varies significantly, and the key factors assoc...

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