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Journal of Iron and Steel Research International 2023年第10期30卷 1939-1951页

作者： xue-feng bai Yan-hui Sun Hui-bin Wu Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing100083China

Submerged entry nozzle(SEN)clogging during continuous casting of Ti-stabilized ultra-pure ferritic stainless(Ti-UPFS)steels was systematically investigated via cross-sectional analysis and acid dissolution *** SEN deposit profile was characterized as occurring in three major layers:(1)an eroded refractory layer;(2)an initial adhesive layer comprised an Al_(2)O_(3)-ZrO_(2) composite sub-layer and a dense Al_(2)O_(3)-based deposit sub-layer;and(3)a porous multiphase deposit layer mainly consisting of MgO·Al_(2)O_(3),CaO-Al_(2)O_(3),and *** MgO·Al_(2)O_(3)-rich inclusions did not adhere directly to the eroded refractory but were entrapped during the deposit *** of inclusion characterization in the tundish revealed that the MgO·Al2O3-rich particles present in the tundish served as the primary source of clogging ***,a novel cavity-induced adhesion model by circular approximation was established to explain the effects of complex inclusion characteristics and refractory material type on adhesion force.A high number of small MgO·Al_(2)O_(3) inclusions were expected to accelerate the buildup of clogging *** the modification of MgO·Al_(2)O_(3)-rich inclusions in the size range of 2-4μm by Ca treatment was crucial to minimizing the risk of SEN clogging during the continuous casting of Ti-UPFS steels.

关键词： Ti-stabilized ultra-pure ferritic stainless steel Submerged entry nozzle clogging MgO·Al_(2)O_(3)-rich inclusion Adhesion Continuous casting

Metal–air batteries: A review on current status and future applications

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Progress in Natural Science:Materials International 2023年第2期33卷 151-171页

作者： Tao Li Meng Huang xue bai Yan-Xiang Wang Key Laboratory of Liquid-Solid Structural Evolution and Processing of Materials of Ministry of Education Shandong University School of Materials Science and Engineering Shandong University of Science and Technology

Metal–air batteries(MABs) have been paid much more attention owing to their greater energy density than the most advanced lithium-ion batteries(LIBs). Rechargeable MABs are considered as promising candidates for the next-generation of energy storage techniques for applications ranging from large-scale energy storage systems to electric vehicles and portable devices. However, there are still numerous scientific problems that must be overcome before their commercial application. With the aim of providing a comprehensive understanding of this new electrochemical system particularly Li–air batteries, this review paper provides an overview of the current status including corresponding strategies from the perspective of various battery components, including air cathode,metal anode and electrolyte. In addition, other promising MABs such as Zn–air, Mg–air and Al–air batteries are also introduced briefly for comparison. Finally, the applications and prospects of these four types of MABs are discussed and some perspectives for this research field are also provided.

关键词： Metal–air batteries Air cathode Metal anode Electrocatalyst Electrolyte

Protecting geometric quantum discord via partially collapsing measurements of two qubits in multiple bosonic reservoirs

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Chinese Physics B 2022年第4期31卷 163-169页

作者： xue-Yun bai Su-Ying Zhang Institute of Theoretical Physics and State Key Laboratory of Quantum Optics and Quantum Optics Devices Shanxi UniversityTaiyuan 030006China

We study the dynamics of geometric quantum discord(GQD) between two qubits,each qubit interacting at the same time with K independent multiple bosonic reservoirs at zero *** both weak and strong qubit-reservoirs coupling regimes,we find that the increase of the number K of reservoirs can induce the damped oscillation of GQD,and enhance the memory effects of the overall *** the Hilbert-Schmidt norm GQD(two-norm GQD) is always smaller than the trace norm geometric quantum discord(one-norm GQD).Therefore,the one-norm GQD is a better way to measure the quantum ***,we propose an effective strategy to improve GQD by using partially collapsing measurements,and we find that the protection effect is better with the increase of the weak measurement strength.

关键词： geometric quantum discord(GQD) the Hilbert-Schmidt norm GQD the trace norm GQD partially collapsing measurements

Greenhouse gas emissions from pig and poultry production sectors in China from 1960 to 2010

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Journal of Integrative Agriculture 2017年第1期16卷 221-228页

作者： WANG Li-zhi xue bai Tianhai Yan Animal Nutrition Institute Sichuan Agricultural University Ya'an 625014 P.R. China Agri-Food and Biosciences Institute Co. Down BT26 6DR United Kingdom

Pig and poultry production in China had experienced considerable changes from 1960 to 2010. The present study aimed to evaluate the effects of these changes on greenhouse gas emission inventeries （expressed as CO2 equivalent） from these two sectors. The inventories included methane emissions from enteric fermentation, methane and nitrous oxide production from manure management. The greenhouse gas emissions from these sources in 2010 in pig sector were 17, 62 and 21%, respectively, and that in poultry sector （including chicken, duck, goose and others） were 1, 18 and 81%, respectively. Total CO2 equivalent increased from 1960 to 2010 in both pig （11 582 to 55564 Gg yr-1） and poultry （1 497 to 14 873 Gg yr-1） sectors. Within poultry sector, emissions from chicken, duck, goose and others accounted for 74, 15, 11 and 0.01% in 2010, respectively. However, during the last 50 years, these emissions continuously reduced when related to production of I kg of pork （8.01 to 1.14 kg kg-1）, poultry meat （1.19 to 0.37 kg kg-1） and egg （0.47 to 0.33 kg kg-1）, which is mainly associated with the continuous improvement in production efficiency in all management systems. These results provide benchmark information for Chinese authorities to develop appropriate policies and mitigation strategies to reduce greenhouse gas emissions from pig and poultry sectors.

关键词： China greenhouse gas inventory pig poultry

Performance of HZSM-5 as Catalyst for Alkylation of Methyl-naphthalene with Methanol in Supercritical Phase

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Chemical Research in Chinese Universities 2005年第6期21卷 680-683页

作者： bai xue-feng WU Wei HU Hao-quan School of Chemical Engineering Dalian University of Technology Dalian 116012 P. R. China Heilongjiang Institute of Petrochemistry Harbin 150040 P. R. China School of Chemistry and Chemical Engineering Heilongjiang University Harbin 150001 P. R. China

The alkylation of methylnaphthalene（MN） with methanol in the presence of HZSM-5 is a promising route for producing 2,6-dimetylnaphthalene（2,6-DMN） with a high selectivity. However, the conversion of MN is very low and the catalyst will be deactivated rapidly with increasing time on stream. In this study, the effects of the reaction pressure on the reactivity, selectivity and life of the catalyst of alkylation of MN over HZSM-5 modified by BaO were investigated. It was observed that with the enhancement of pressure, the conversion of MN increased, but the selectivity of 2,6-DMN kept unchanged, which was about 40% -42%. When the alkylation was carried out under a supercritical condition, the conversion of MN was 3-6 times higher and the life of catalyst was 25-30 times longer than those at an ambient pressure. The thermogravimetric analyses of the deactivated catalysts at different reaction pressures indicate that the amount of coke deposited on the catalysts was about 10% to 12 %, and the coke-burning reactions mainly took place in a temperature range from 720 to 860 K, and the apparent activation energies of the coke-burning catalysts at 0. 1 MPa（ 10 h） and 7. 6 MPa（ 108 h） were, respectively, 65.90 and 84. 72 kJ/mol. It is concluded from tile results that the supercritical condition is advantageous to enhancing the conversion of alkylation and extraction in situ, and to transporting those high molecular-weight poly-aromatic compounds so as to extend the catalyst life successively.

关键词： Methylnaphthalene Alkylation Shape-selective catalysis Supercritical phase Coke-burning

Carbon nanomaterial addition changes soil nematode community in a tall fescue mesocosm

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Pedosphere 2022年第5期32卷 777-784页

作者： Shulan ZHAO xue bai Mengdi MOU Lian DUO Tianjin Key Laboratory of Animal and Plant Resistance College of Life SciencesTianjin Normal UniversityTianjin 300387(China)

Carbon nanomaterials have been widely used in industry and inevitably enter the ***,there is little information about their influence on the abundance and diversity of soil nematode *** evaluated the impact of three kinds of carbon nanomaterials(graphene,graphene oxide,and carbon nanotubes)on the abundance and diversity of soil nematodes after growing tall fescue for 130 d using a laboratory pot experiment.A total of 29 genera of nematodes were identified in all the *** nanomaterials significantly increased the abundance of total nematodes and plant *** presence of graphene and graphene oxide increased the numbers of bacterivores,and graphene benefited *** total nematode abundance was1.9-2.9 times greater in the carbon nanomaterial treatments than in the control with no carbon nanomaterial ***,graphene oxide and carbon nanotubes decreased the values of nematode community parameters,e.g.,diversity,species richness,and structure *** with the control,the addition of graphene resulted in a community with a higher plant-parasitic index(i.e.,the maturity index of the plant-parasitic nematodes).Overall,our findings highlight that the addition of carbon nanomaterials has a negative influence on the composition and diversity of the nematode community,simplifying the community structure.

关键词： carbon nanotubes community diversity community structure graphene graphene oxide nematode abundance plant-parasitic index species richness

CYCLONIC RECIRCULATION ON THE LEFT SIDE OF THE KUROSHIO IN THE EAST CHINA SEA

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Journal of Hydrodynamics 2001年第3期13卷 133-137页

作者： bai, xue-Zhi bai, Hong Hu, Dun-Xin Wang, Fan Inst. of Ocean. Chinese Acad. of Sci. Qingdao 266071 China

Based on Princeton Ocean model, circulation in the Yellow Sea and East China Sea and its annual cycle are simulated. The model results show a weak countercurrent on the left side of the Kuroshio. The countercurrent separates from the main stream of the Kuroshio around 30°N, 128°E, where the Kuroshio turns right to the Tokara Strait it flows southwestward along isobaths, meets with the offshore branch of Taiwan Warm Current around 28°N. 124°E, then returns back and joins the main stream, so that a cyclonic circulation is formed. The center and strength of the countercurrent and cyclonic circulation exhibits seasonal variation. The lower layer cold water observed on PN section of the East China Sea in summer and autumn is considered to be associated with the modeled cyclonic circulation. According to Rossby's wake-stream theory, lateral friction may be the main mechanism of the countercurrent on the left side of the Kuroshio.

关键词： Computer simulation Flow interactions Salinity measurement Seawater Temperature distribution

Biomass-Derived Carbon Dots and Their Applications

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Energy & Environmental Materials 2019年第3期2卷 172-192页

作者： Weixue Meng xue bai Boyang Wang Zhongyi Liu Siyu Lu bai Yang College of Chemistry and Molecular Engineering Zhengzhou UniversityZhengzhou 450001China State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012P.R.China

Carbon dots(CDs) have received much attention due to their superior properties including water solubility, low toxicity, biocompatibility, small size,fluorescence, and ease of modification. The use of a more environmentally friendly method to prepare high-quality CDs is still an urgent question waiting for solve. The use of renewable, inexpensive, and green biomass resources not only meets the urgent need for large-scale synthesis biomass CDs(BCDs), but also promotes the development of sustainable *** this article, we summarize the representative methods for synthesizing BCDs in green and simple ways using biomass as a carbon source, including hydrothermal carbonization, and microwave, pyrolysis. The prepared BCDs have a uniform particle size distribution and a relatively high throughput,which provide a method to scale up industrial production. Moreover, the integration of specific optical properties, that is, tunable photoluminescence and up-photoluminescence, has led to remarkable use in bioimaging, sensing,and drug delivery. But the current review is not particularly comprehensive for BCDs. Therefore, we now provide a review focusing on the synthesis,properties, and recent advances in BCDs in biosensing, bioimaging,optoelectronics, and catalytic applications.

关键词： bioimaging biomass carbon dots catalysis syntheses

鉴定ATP结合盒转运蛋白家族中ABCB1作为动脉粥样硬化诊断生物标志物的研究

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医学理论与实践 2025年第1期38卷 1-7,13页

作者：白雪王启彤吴宇碟程乐大理大学基础医学院云南省大理市671013

目的:ATP结合盒(ABC)转运蛋白基因家族影响动脉粥样硬化疾病的发展,通过基因表达综合数据库(GEO)数据挖掘,研究ABC转运蛋白基因家族中与动脉粥样硬化(AS)诊断相关的基因,以探索潜在的AS标志物。方法:共纳入4个备选数据集(GSE43292、GSE4... 详细信息

目的:ATP结合盒(ABC)转运蛋白基因家族影响动脉粥样硬化疾病的发展,通过基因表达综合数据库(GEO)数据挖掘,研究ABC转运蛋白基因家族中与动脉粥样硬化(AS)诊断相关的基因,以探索潜在的AS标志物。方法:共纳入4个备选数据集(GSE43292、GSE40231、GSE100927和GSE_(2)1545),共包含267例AS患者和204例对照进行分析。为了鉴定ABC家族基因,本研究采用ROC分析、t检验和Mann-Whitney U检验等统计学分析方法。利用检索相互作用基因/蛋白质数据库(STRING)通过注释、可视化和集成发现数据库(DAVID)进行蛋白质—蛋白质相互作用(PPI)网络创建和通路分析。并采用加权基因共表达网络分析(WGCNA)和基因集合富集分析(GSEA)进行功能分析。最后,对核心基因进行免疫浸润分析。结果:经过多轮筛选和确认,在48个基因中只有ABCB1(P0.85)基因被保留。在STRING数据库中获得了21个与ABCB1直接相互作用的基因,利用Cytoscape 3.9.1软件构建PPI网络。对这21个基因进行了GO和KEGG富集分析,发现这些基因主要在各种代谢途径发挥作用。GSEA分析结果显示,ABCB1共在112条通路富集,其中40条与ABCB1高表达相关,72条与ABCB1低表达相关。WGCNA分析识别AS中与ABCB1表达相关的基因模块共有14个(β=3),其中绿松石模块与ABCB1相关性最强(Cor=0.98,P<0.001),该模块共包含了4517个基因。对该模块基因进行GO和KEGG富集分析,ABCB1在细胞黏附、血管生成、病灶黏附、ECM受体相互作用和PI3K-Akt信号通路相关。免疫浸润分析结果显示,在AS组中,活化的肥大细胞和M0、M1、M2巨噬细胞明显增加,而T淋巴细胞、灭活的NK细胞和单核细胞明显减少。结论:本研究发现ABCB1在AS患者中具有良好的诊断价值,且在AS患者中有显著表达。这些发现可能为未来AS的管理和治疗提供方向。

关键词：动脉粥样硬化 ABCB1 基因集富集分析加权共表达网络分析免疫浸润分析

Free-moving-state microscopic imaging of cerebral oxygenation and hemodynamics with a photoacoustic fiberscope

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Light(Science & Applications) 2024年第1期13卷 33-46页

作者： Xiaoxuan Zhong Yizhi Liang Xiaoyu Wang Haoying Lan xue bai Long Jin bai-Ou Guan Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Institute of Photonics TechnologyJinan UniversityGuangzhou510632China

We report the development of a head-mounted photoacoustic fiberscope for cerebral imaging in a freely behaving *** 4.5-gram imaging probe has a 9-µm lateral resolution and 0.2-Hz frame rate over a 1.2-mm wide *** probe can continuously monitor cerebral oxygenation and hemodynamic responses at single-vessel resolution,showing significantly different cerebrovascular responses to external stimuli under anesthesia and in the freely moving *** example,when subjected to high-concentration CO_(2) respiration,enhanced oxygenation to compensate for hypercapnia can be visualized due to cerebral regulation in the freely moving *** studies exhibit significantly weakened compensation capabilities in obese *** new imaging modality can be used for investigating both normal and pathological cerebrovascular functions and shows great promise for studying cerebral activity,disorders and their treatments.

关键词： cerebral anesthesia moving