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arXiv 2025年

作者： Chen, xuwen Shen, Shunlin zhang, Zhifei Department of Mathematics University of Rochester RochesterNY14627 United States School of Mathematical Sciences University of Science and Technology of China Hefei230026 China School of Mathematical Sciences Peking University Beijing100871 China

We broaden the application of the l2-decoupling theorem to the Boltzmann equation. We prove full-range Strichartz estimates for the linear problem in the Td setting. We establish space-time bilinear estimates, and hence the unconditional uniqueness of solutions to the Rd and Td Boltzmann equation for the Maxwellian particle and soft potential with an angular cutoff, adopting a unified hierarchy scheme originally developed for the nonlinear Schrödinger equation. Copyright © 2025, The Authors. All rights reserved.

关键词： Boltzmann equation

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Design and Implementation of Automatic Testing Software Based on Labview and TestStand 22

Design and Implementation of Automatic Testing Software Base...

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8th International Conference on Computing and Artificial Intelligence, ICCAI 2022

作者： zhang, Youquan Li, xuwen Wu, Qiang Liu, Jie Beijing University of Technology China

ISBN: (纸本)9781450396110

With the increasing complexity of circuit board function, both the performance index of circuit board and the number of circuit test points are increasing day by day. It is far from satisfying the test demand of large-scale board production manually. In order to realize automatic test of electrical signal on board, automatic configuration of test sequence and automatic generation of test report, this paper designed an automatic test software management platform based on Labview and TestStand, and proposed a solution of automatic generation of test report according to template. And this paper provides a method of parameter configuration and management of instrument and result threshold of automatic test sequence, which further improves the test efficiency of automatic test and realizes unified management of test parameters, compared with gradually configuring instrument parameters in each test step of test sequence. © 2022 ACM.

关键词： Software testing

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Preparation of Light-Colored Lignosulfonate Sunscreen Microcapsules with Strengthened UV-Blocking and Adhesion Performance

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ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2022年第29期10卷 9381-9388页

作者： zhang, Aicheng Wu, xuwen Ouyang, Xinping Lou, Hongming Yang, Dongjie Qian, Yong Qiu, Xueqing South China Univ Technol Sch Chem & Chem Engn State Key Lab Pulp & Paper Engn Guangdong Prov Key Lab Green Chem Prod Technol Guangzhou 510640 Peoples R China Guangdong Univ Technol Sch Chem Engn & Light Ind Guangzhou 510006 Peoples R China

Inspired by the UV-blocking of lignin in plants and the adhesion of catechol in mussel dopamine, light-colored lignin-based microcapsules ((OMC + BMDM)/LS-OH3-T) with strengthened UV-blocking and good bioadhesion were obtained by demethylation modification of sodium lignosulfonate (LS) and encapsulation of chemical sunscreen actives. The results show that the adhesion between LS and skin improved from 0.158 to 0.173 mN/m due to the formation of catechol groups. When (OMC + BMDM)/LS-OH3-T was used as the unique active ingredient in the sunscreen, the sun protection factor (SPF) reached 86.67, fully meeting the daily sunscreen requirement. In addition, the color of microcapsule-based sunscreen was close to pure white, which effectively solves the dark color problem of the existing lignin based sunscreens. As it demonstrates good biocompatibility, this new lightcolored lignin-based sunscreen agent has good application potential in the skincare field.

关键词： sodium lignosulfonate microcapsules UV-blocking bioadhesive white color

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Removal of viscous and clogging suspended solids in the wastewater from acrylonitrile-butadiene-styrene resin production by a new dissolved air release device

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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION 2021年 148卷 524-535页

作者： zhang, Xiaohang zhang, Xuewei Liu, Yanping zhang, Qing Yang, Shipeng He, xuwen Chinese Acad Sci Ctr Agr Resources Res Inst Genet & Dev Biol Key Lab Agr Water Resources 286 Huaizhong Rd Shijiazhuang 050021 Hebei Peoples R China China Univ Min & Technol Beijing Sch Chem & Environm Engn Xueyuan Rd Beijing 100083 Peoples R China Handan Municipal Publ Util Investment Grp Co Ltd Dept Engn & Technol 58 Guoyuan Rd Handan City 056000 Hebei Peoples R China Tsinghua Univ State Key Joint Lab Environm Simulat & Pollut Con 30 Shuangqing Rd Beijing 100084 Peoples R China

The suspended solids in the acrylonitrile-butadiene-styrene(ABS) wastewater are in the form of viscouslatex, which strengthens the blocking phenomenon of the release device, increases the suspended solids in the return water and reduces the removal effect of the air flotation apparatus. Therefore, we designed a new release device. To achieve the goal of controlling the bubbles in the target diameter and enlarge the hole size as much as possible to reduce blockage, we studied the relationship between the geometry structure and performance of the new, which could be describeed by fixed polynomials. The best demulsification effect could be obtained by the hybrid of the polyferric sulfate and FO4440SSH, and the highest removal rate was 92.51 %. After a long-running in the ABS sewage treatment plant of the petrochemical industry, the removal rate of the new could maintain at a high level(>90 %), and the removal effect was stable. Compared with other release devices that reported in the literatures, the new one had advantages significant in both removal efficiency and operation cost. (C) 2020 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

关键词： Acrylonitrile-butadiene-styrene wastewater Dissolved air flotation The volume of gas release The flow rate Demulsification

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Fatty Infiltration of Multifidus Muscles: An Easily Overlooked Risk Factor for the Severity of Osteoporotic Vertebral Fractures

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ORTHOPAEDIC SURGERY 2024年第3期16卷 585-593页

作者： Xu, Wuyan Liu, Xiaowen Wu, Li Liang, Shaohua zhang, Ye Huang, Junbing Zeng, xuwen Li, Siming Xu, Fan Xiong, Yuchao Jinan Univ Dept Radiol Guangzhou Red Cross Hosp Guangzhou Peoples R China Jinan Univ Dept Orthoped Guangzhou Red Cross Hosp Guangzhou Peoples R China Jinan Univ Clin Med Coll 2 Shenzhen Peoples R China Jinan Univ Guangzhou Red Cross Hosp Dept Radiol Guangzhou 510220 Peoples R China

ObjectivesOsteoporotic vertebral fractures (OVFs) are a critical public health concern requiring urgent attention, and severe OVFs impose substantial health and economic burdens on patients and society. Analysis of the risk factors for severe OVF is imperative to actively prevent the occurrence of this degenerative disorder. This study aimed to investigate the risk factors associated with the severity of OVF, with a specific focus on changes in the paraspinal *** total of 281 patients with a first-time single-level acute OVF between January 2016 and January 2023 were enrolled in the study. Clinical and radiological data were collected and analyzed. The cross-sectional area (CSA) and degree of fatty infiltration (FI) of the paraspinal muscles, including the multifidus muscles (MFMs), erector spinae muscles (ESMs), and psoas major muscles (PSMs), were measured by magnetic resonance imaging (MRI) of the L4/5 intervertebral discs. According to the classification system of osteoporotic fractures (OF classification) and recommended treatment plan, OVFs were divided into a low-grade OF group and a high-grade OF group. Univariate and multivariate logistic regression analyse s were performed to identify risk factors associated with the severity of ***-eight patients were included in the low-grade OF group, and 183 patients were included in the high-grade OF group. Univariate analysis revealed a significantly higher incidence of a high degree of FI of MFMs (OR = 1.71, p = 0.002) and ESMs (OR = 1.56, p = 0.021) in the high-grade OF group. Further multivariate logistic regression analysis demonstrated that a high degree of FI of the MFMs (OR = 1.71, p = 0.002) is an independent risk factor for the severity of *** high degree of FI of the MFMs was identified as an independent risk factor for the severity of OVF. Decreasing the degree of FI in the MFMs might lower the incidence of the severity of OVF, potentially reducing the necessity for s

关键词： Fatty Infiltration Osteoporosis Multifidus Muscles Osteoporotic Vertebral Fracture

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THE SECOND ORDER 2D BEHAVIORS OF A 3D BOSE GASES IN THE GROSS-PITAEVSKII REGIME

arXiv

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arXiv 2024年

作者： Chen, xuwen Wu, Jiahao zhang, Zhifei Department of Mathematics University of Rochester RochesterNY14627 United States School of Mathematical Sciences Peking University Beijing100871 China

We consider a system of N bosons interacting in a three-dimensional box endowed with periodic boundary condition that is strongly confined in one direction such that the normalized thickness of the box d 1. We assume particles to interact through a repulsive, radially symmetric and short-range interaction potential with scattering length scale a d. We present a comprehensive study of such system in the Gross-Pitaevskii regime, up to the second order ground state energy, starting from proving optimal Bose-Einstein condensation results which were not previously available. The fine interplay between the parameters N, a and d generates three regions. Our result in one region on the one hand, is compatible with the classical three-dimensional Lee-Huang-Yang formula. On the other hand, it reveals a new mechanism exhibiting how the second order correction compensates and modifies the first order energy, which was previously thought of as containing a jump, and thus explains how a three-dimensional Bose gas system smoothly transits into two-dimensional system. Moreover, delving into the analysis of this new mechanism exclusive to the second order, we discover a dimensional coupling correlation effect, deeply buried away from the expected 3D and quasi-2D renormalizations, and calculate a new second order correction to the ground state energy. Copyright © 2024, The Authors. All rights reserved.

关键词： Bose-Einstein condensation

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Identification of circadian rhythm-related gene classification patterns and immune infiltration analysis in heart failure based on machine learning

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HELIYON 2024年第6期10卷 e27049页

作者： Wang, Xuefu Rao, Jin zhang, Li Liu, xuwen zhang, Yufeng Univ Shanghai Sci & Technol Sch Hlth Sci & Engn Shanghai Peoples R China Naval Med Univ Shanghai Changzheng Hosp Dept Cardiothorac Surg Shanghai Peoples R China Guangxi Univ Nanning Peoples R China

Background: Circadian rhythms play a key role in the failing heart, but the exact molecular mechanisms linking changes in the expression of circadian rhythm-related genes to heart failure (HF) remain unclear. Methods: By intersecting differentially expressed genes (DEGs) between normal and HF samples in the Gene Expression Omnibus (GEO) database with circadian rhythm-related genes (CRGs), differentially expressed circadian rhythm-related genes (DE-CRGs) were obtained. Machine learning algorithms were used to screen for feature genes, and diagnostic models were constructed based on these feature genes. Subsequently, consensus clustering algorithms and nonnegative matrix factorization (NMF) algorithms were used for clustering analysis of HF samples. On this basis, immune infiltration analysis was used to score the immune infiltration status between HF and normal samples as well as among different subclusters. Gene Set Variation Analysis (GSVA) evaluated the biological functional differences among subclusters. Results: 13 CRGs showed differential expression between HF patients and normal samples. Nine feature genes were obtained through cross-referencing results from four distinct machine learning algorithms. Multivariate LASSO regression and external dataset validation were performed to select five key genes with diagnostic value, including NAMPT, SERPINA3, MAPK10, NPPA, and SLC2A1. Moreover, consensus clustering analysis could divide HF patients into two distinct clusters, which exhibited different biological functions and immune characteristics. Additionally, two subgroups were distinguished using the NMF algorithm based on circadian rhythm associated differentially expressed genes. Studies on immune infiltration showed marked variances in levels of immune infiltration between these subgroups. Subgroup A had higher immune scores and more widespread immune infiltration. Finally, the Weighted Gene Co -expression Network Analysis (WGCNA) method was utilized to discern

关键词： Heart failure Circadian rhythm Machine learning Immune infiltration Unsupervised clustering Bioinformatics

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Investigation of the Induration Mechanism of Red Mud Pellets with Tartaric Acid Additions

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MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW 2023年第8期44卷 554-564页

作者： Qin, Yihe Yuan, Run Yue, Pu Li, Chunquan zhang, Xuewei Li, Na Bai, Lu Wang, Zichen Xia, Yu He, xuwen China Univ Min & Technol Sch Chem & Environm Engn Beijing Peoples R China

Herein, tartaric acid (TA) was used as a binder to prepare red mud pellets. The effect of TA on the compressive strength and induration mechanism of the pellets containing TA was analyzed via the changes in crystal structure, functional groups, and valence states of the constituent elements. The induration mechanism of TAPE is likely the chemical reaction between TA and partial calcite along with complexation of TA with minerals containing Ca(II), Al(III), and Fe(III). The density functional theory calculation results revealed that the TA-Ca(II) complexation products in red mud were more stable than those of Al(III) and Fe(III).

关键词： Tartaric acid compression strength density functional theory calculation pellet

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THE SECOND ORDER HUANG-YANG FORMULA TO THE 3D FERMI GAS: THE GROSS-PITAEVSKII REGIME

arXiv

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arXiv 2024年

作者： Chen, xuwen Wu, Jiahao zhang, Zhifei Department of Mathematics University of Rochester RochesterNY14627 United States School of Mathematical Sciences Peking University Beijing100871 China

For a system of N Fermions of spin 1/2, with its interaction potential of scattering length a, the classical Huang-Yang formula [29] states that the energy density e(ρ) is of the form e(ρ) = 3/5 (3π2) 2/3 ρ 3/5 + 2πaρ2 + 12/35 (11 − 2 ln 2)3 1/3 π 2/3 a2ρ 7/3 + o(ρ 3). 7 We consider a general system of N Fermions of spin 1/q with the scattering length of the interaction potential at the scale a ∝ N−1, that is, in the Gross-Pitaevskii regime. We prove the 2nd order ground state energy approximation corresponding to the Huang-Yang formula. The thermodynamic limit case shares a similar logic, and could be dealt with in a separate paper. Copyright © 2024, The Authors. All rights reserved.

关键词： Fermions

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Comparing Electrochemical Passivation and Surface Film Chemistry of 654SMO Stainless Steel and C276 Alloy in Simulated Flue Gas Desulfurization Condensates

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MATERIALS 2024年第8期17卷 1827页

作者： Liao, Luhai Cheng, Yifan zhang, He Yuan, xuwen Li, Fengguang Wuhan Univ Sci & Technol Key Lab Ferrous Met & Resources Utilizat Minist Educ Wuhan 430081 Peoples R China Wuhan Univ Sci & Technol Hubei Prov Key Lab New Proc Ironmaking & Steel Mak Wuhan 430081 Peoples R China Hubei Univ Automot Technol Sch Mat Sci & Engn Shiyan 442002 Peoples R China

This research examines the behavior of electrochemical passivation and the chemistry of surface films on 654SMO super austenitic stainless steel and C276 nickel-based alloy in simulated condensates from flue gas desulfurization in power plant chimneys. The findings indicate that the resistance to polarization of the protective film on both materials initially rises and then falls with either time spent in the solution or the potential of anodic polarization. Comparatively, 654SMO exhibits greater polarization resistance than C276, indicating its potential suitability as a chimney lining material. Mott-Schottky analysis demonstrates that the density of donors in the passive film formed on 654SMO exceeds that on C276, potentially due to the abundance of Fe oxide in the passive film, which exhibits the characteristics of an n-type semiconductor. The primary components of the passive films on both materials are Fe oxides and Cr oxides. The formation of a thin passive film on C276 in the simulated condensates is a result of the low Gibbs free energy of nickel oxide and low Cr content. The slower diffusion coefficient of point defects leads to the development of a thicker and more compact passive film on the surface of 654SMO.

关键词： super austenitic stainless steel nickel-based alloy electrochemical passivation behavior flue gas desulfurization passive film

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