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Design and Application of Turbine Cascade Partitioned Endwall Profiling

Journal of Thermal Science 2025年第1期34卷 110-128页

作者： ZENG Fei JIANG Ruiqi XUE Xingxu du Wei LUO Lei ZHOU Xun AECC Hunan Aviation Powerplant Research Institute Zhuzhou 412002China School of Energy Science and Technology Harbin Institute of TechnologyHarbin 150001China Science and Technology on Diesel Engine Turbocharging Laboratory China North Engine Research InstituteTianjin 300270China

The influence of partitioned profiling design based on a large-pitch highly loaded cascade is studied by numerical *** partitioned profile is mainly composed of a pressure-side convex structure near the leading edge and a suction-side convex structure at the midstream and downstream sides of the *** influence of the change in the vertex axial position and peak value of the B-line on the secondary flow control is *** this paper,air(ideal gas)is selected as the flow *** average static pressure at the outlet and the average total temperature at the inlet are kept *** γ-θ is used as the turbulence *** results show that the pressure-side convex structure suppresses the spanwise and pitchwise migration of the inlet flow by adjusting the static pressure distribution of the flow field,so the development of the pressure-side leg of the horseshoe vortex is effectively *** suction-side convex structure adjusts the static pressure distribution of the flow field and increases the included angle between the cross-flow and suction surface,so the accumulation of low-momentum fluid,the development of a corner vortex and the flow separation at the trailing edge of the suction-side surface are all suppressed near the endwall-suction ***,the energy loss coefficient of the large-pitch highly loaded cascade is decreased from 0.0564 to 0.0485,representing a 25% reduction in secondary flow losses.

关键词： large-pitch highly loaded cascade highly loaded design non-axisymmetrical endwall design secondary flow control partitioned endwall profiling

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Investigation of bubbles escape behavior from low basicity mold flux for high-Mn high-Al steels using 3D X-ray microscope

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 102-110页

作者： Qiang Liu Xiang Li Shen du Ming Gao Yanbin Yin Jiongming Zhang State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

during the continuous casting process of high-Mn high-Al steels,various types of gases such as Ar need to escape through the top of the *** which,the behavior of bubbles traversing the liquid slag serves as a restrictive link,closely associated with viscosity and the thickness of liquid *** contrast to two-dimensional surface observation,three-dimensional(3D)analysis method can offer a more intuitive,accurate,and comprehensive ***,this study employs a 3D X-ray microscope(3D-XRM)to obtained spatial distribution and 3D morphological characteristics of residual bubbles in mold flux under different basicity of liquid slag,different temperatures,and different holding *** results indicate that as basicity of slag increases from 0.52 to 1.03,temperature increases from 1423 to 1573 K,the viscosity of slag decreases,the floating rate of bubbles *** addition,when holding time increases from 10 to 30 s,the bubbles floating distance increases,and the volume fraction and average equivalent sphere diameter of the bubbles solidified in the mold flux gradually *** one word,increasing the basicity,temperature,and holding time leading to an increase in the removal rate of bubbles especially for the *** findings of bubbles escape behavior provide valuable insights into optimizing low basicity mold flux for high-Mn high-Al steels.

关键词： mold flux low basicity bubbles three-dimensional X-ray microscope viscosity

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Molecular characteristics of dissolved organic phosphorus in watershed runoff:Coupled influences of land use and precipitation

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Journal of Environmental Sciences 2025年第2期148卷 387-398页

作者： Zhanyao Shi Yao du Hongni Liu Yamin Deng Yiqun Gan Xianjun Xie State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic Pollution China University of GeosciencesWuhan 430078China Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science China University of GeosciencesWuhan 430078China School of Environmental Studies&State Key Laboratory of Biogeology and Environmental Geology China University of GeosciencesWuhan 430078China

Land use and precipitation are two major factors affecting phosphorus(P)pollution of watershed ***,molecular characterization of dissolved organic phosphorus(DOP)in runoff under the joint influences of land use and precipitation remains *** study used Fourier transform ion cyclotron resonance mass spectrometry(FT-ICR-MS)to study the molecular characteristics of DOP in a typical P-polluted watershed with spatially variable land use and *** results showed that low precipitation and intense human activity,including phosphate mining and associated industries,resulted in the accumulation of aliphatic DOP compounds in the upper reaches,characterized by low aromaticity and low biological *** precipitation and widespread agriculture in the middle and lower reaches resulted in highly unsaturated DOP compounds with high biological stability constituting a higher proportion,compared to in the upper ***,under similar precipitation,more aliphatic DOP compounds characterized by lower aromaticity and higher saturation were enriched in the lower reaches due to more influence from urban runoff relative to the middle *** and/or microbial processes did result in changes in the characteristics of DOP compounds during runoff processes due to the prevalence of low molecular weight and low O/C bioavailable aliphatic DOP molecules in the upper reaches,which were increasingly transformed into refractory compounds from the upper tomiddle *** results of this study can increase the understanding of the joint impacts of land use and precipitation on DOP compounds in watershed runoff.

关键词： Watershed runoff DOP FT-ICR MS Land use Precipitation

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Application of FTIR two-dimensional correlation spectroscopy(2D-COS)analysis in characterizing environmental behaviors of microplastics:A systematic review

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Journal of Environmental Sciences 2025年第1期147卷 200-216页

作者： Shuang Peng Feipeng Wang Dongbin Wei Cuiping Wang Haijun Ma Yuguo du Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China North Minzu University Yinchuan 750001China

Microplastics(MPs)are ubiquitous in the environment,continuously undergo aging processes and release toxic chemical *** the environmental behaviors of MPs is critical to accurately evaluate their long-term ecological *** twodimensional correlation spectroscopy(2D-COS)is a powerful tool for MPs studies,which can dig more comprehensive information hiding in the conventional one-dimensional spectra,such as infrared(IR)and Raman *** recent applications of 2D-COS in analyzing the behaviors and fates of MPs in the environment,including their aging processes,and interactions with natural organicmatter(NOM)or other chemical substances,were summarized *** main requirements and limitations of current approaches for exploring these processes are discussed,and the corresponding strategies to address these limitations and drawbacks are proposed as ***,new trends of 2D-COS are prospected for analyzing the properties and behaviors of MPs in both natural and artificial environmental processes.

关键词： Microplastics(MPs) 2D-COS application Aging processes Interactions

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Preparation of FeCoNi medium entropy alloy from Fe^(3+)-Co^(2+)-Ni^(2+)solution system

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 92-101页

作者： Zongyou Cheng Qing Zhao Mengjie Tao Jijun du Xingxi Huang Chengjun Liu Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China Engineering Research Center of Frontier Technologies for Low-carbon Steelmaking(Ministry of Education) Shenyang 110819China

In recent years,medium entropy alloys have become a research hotspot due to their excellent physical and chemical *** controlling reasonable elemental composition and processing parameters,the medium entropy alloys can exhibit similar properties to high entropy alloys and have lower *** this paper,a FeCoNi medium entropy alloy precursor was prepared via sol-gel and coprecipitation methods,respectively,and FeCoNi medium entropy alloys were prepared by carbothermal and hydrogen *** phases and magnetic properties of FeCoNi medium entropy alloy were *** showed that FeCoNi medium entropy alloy was produced by carbothermal and hydrogen reduction at 1500℃.Some carbon was detected in the FeCoNi medium entropy alloy prepared by carbothermal *** alloy prepared by hydrogen reduction was uniform and showed a relatively high ***,the hydrogen reduction product exhibited better saturation magnetization and lower coercivity.

关键词： medium entropy alloy sol-gel co-precipitation carbothermal hydrogen reduction

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Highly Oxidized Molecules Make a Significant Contribution to Enhanced Aromatic-Derived Secondary Organic Aerosol under a Humid Environment

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Advances in Atmospheric Sciences 2025年第4期42卷 641-652页

作者： Zhaomin YANG Kun LI Lin du Environment Research Institute Shandong UniversityQingdao 266237China

Enhanced mass concentrations of aromatic-derived secondary organic aerosol(SOA)are frequently observed during humid-haze ***,the influencing mechanism of relative humidity(RH)in aromatic-derived SOA formation remains incompletely ***,the RH dependence of SOA formation in the presence of NOx was explored by a series of chamber experiments for toluene(TOL)and 1,3,5-trimethylbenzene(TMB)*** yield of TOL SOA and TMB SOA increased by 221%and 52%with increasing RH from~8%to~70%,*** results from a high-resolution mass spectrometer showed that SOA constituents with high oxygen content(O/C>0.6)were more abundant in SOA formed in the~70%RH *** elevated yields and O/C of SOA could be attributed to the promoted formation and particle-phase diffusivity of highly oxidized *** addition,in comparison with TMB,TOL could produce more unsaturated aldehydes,which are oxidized into carboxylic acids with high O/C,leading to a more sensitive response of TOL SOA formation to the change in *** work provides mechanistic insights into RH roles in aromatic SOA formation and is helpful for a better understanding of humid-haze events.

关键词： secondary organic aerosol aromatic hydrocarbons highly oxidized molecules relative humidity

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巴塘水电站主体工程开挖料作混凝土骨料研究

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四川水力发电 2021年第2期40卷 88-91,104页

作者：杜晓凡田应辉华电金沙江上游水电开发有限公司巴塘分公司四川巴塘627650

通过对巴塘水电站主体工程开挖料进行物理性能、碱活性、云母含量及混凝土配合比、力学性能等试验,得出主体工程开挖料弱风化以下黑云母石英片岩满足相关规范各项指标要求,可以作为混凝土骨料、大坝过渡料及反滤料的结论,并据此对料场... 详细信息

通过对巴塘水电站主体工程开挖料进行物理性能、碱活性、云母含量及混凝土配合比、力学性能等试验,得出主体工程开挖料弱风化以下黑云母石英片岩满足相关规范各项指标要求,可以作为混凝土骨料、大坝过渡料及反滤料的结论,并据此对料场、渣场、砂石混凝土加工系统布置进行调整,大大降低了工程投资,提高了巴塘水电站的经济性。

关键词：巴塘水电站人工骨料力学试验成果应用

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Stability switches mechanism and PID control in reaction-diffusion network-organized neural systems with transmission delays

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Science China(Technological Sciences) 2025年第2期68卷 199-215页

作者： Xiangyu du Min XIAO Wenwu YU Jiajin HE College of Automation&College of Artificial Intelligence Nanjing University of Posts and TelecommunicationsNanjing 210023China College of Mathematics Southeast UniversityNanjing 211189China

Traditionally,the spatiotemporal dynamics of neural networks have been analyzed in the locally continuous *** this modeling approach is straightforward and practical,it fails to encapsulate real-world networks’intricate topological structures and ***,the mechanisms of stability switches induced by time delays and diffusion effects in networkorganized systems are still ***,effective dynamic optimization strategies for network-organized models remain to be *** this study,we develop a delayed reaction-diffusion neural network model on complex *** system incorporates the effects of inter-nodal diffusion coupling and exhibits profound architectural *** then pioneer the proportional-integral-derivative(PID)feedback control into the network-organized model to modulate dynamic *** linear stability analysis is conducted firstly,demonstrating that Turing patterns and Hopf bifurcation can be induced in the controlled neural network by varying diffusion coefficients and time ***,the bifurcation direction is deduced via the center manifold ***,a series of simulations are performed to validate the theoretical analysis and substantiate the efficacy of the PID control *** results exhibit that the PID feedback controller can flexibly regulate the dynamics of the network-organized systems and possesses excellent disturbance rejection capabilities.

关键词： complex network neural networks PID control turing instability hopf bifurcation time delays turing pattern

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脑白质疏松症患者脑血流自动调节研究

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潍坊医学院学报 2019年第2期41卷 123-125页

作者：都晓帆张爱娟潍坊医学院神经病学教研室山东潍坊261053 潍坊市人民医院神经内科

目的探讨脑白质疏松(LA)与脑血流自动调节有无相关性以及脑白质疏松症的危险因素。方法选择181例神经内科住院患者,根据患者入院后颅脑MRI分析,以Fazekas量表将入组患者按照LA的严重程度进行分级分组(LA0级组、LA1级组、LA2级组、LA3级... 详细信息

目的探讨脑白质疏松(LA)与脑血流自动调节有无相关性以及脑白质疏松症的危险因素。方法选择181例神经内科住院患者,根据患者入院后颅脑MRI分析,以Fazekas量表将入组患者按照LA的严重程度进行分级分组(LA0级组、LA1级组、LA2级组、LA3级组),并用经颅多普勒行卧立位脑血流检测。搜集每位患者的年龄、性别、高血压病、糖尿病、冠心病、吸烟、饮酒、血脂、血小板、空腹血糖、白蛋白、球蛋白、颈动脉狭窄及内中膜厚度等指标进行调查评估,用SPSS17.0统计分析软件进行分析。结果 Spearman检验可知,脑白质疏松与脑血流自动调节呈明显正相关关系(P<0.05)。年龄、高血压、脑血流调节功能受损、颈动脉狭窄及内中膜厚度是脑白质疏松发病的影响因素(P<0.05),Logistic回归分析可知,年龄、高血压、颈动脉狭窄、脑血流调节功能受损是脑白质疏松发病的独立危险因素(P<0.05)。结论脑白质疏松症与脑血流调节功能呈正相关,年龄、高血压、颈动脉狭窄、脑血流调节功能受损是脑白质疏松发病的独立危险因素。临床可通过对上述危险因素进行积极干预防治脑白质疏松。

关键词：脑白质疏松脑血流调节经颅多普勒危险因素分析

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Targeting novel sites represents an effective strategy for combating drug resistance

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Chinese Chemical Letters 2025年第1期36卷 3-5页

作者： Shaoqing du Xinyong Liu Xueping Hu Peng Zhan Department of Medicinal Chemistry Key Laboratory of Chemical Biology(Ministry of Education)School of Pharmaceutical SciencesCheeloo College of MedicineShandong UniversityJi’nan 250012China Institute of Frontier Chemistry School of Chemistry and Chemical EngineeringShandong UniversityQingdao 266237China

Drug resistance poses an escalating global challenge in the battle against *** effectiveness of conventional antibiotics and other anti-infective drugs is waning as microbes develop heightened resistance to existing *** resistance poses a formidable challenge to global health and development,ranking among the top 10 public health threats to humanity as declared by the World Health *** indicate that if left unaddressed,antimicrobial resistance could inflict an annual economic burden on the global GDP ranging from$1trillion to$3.4 trillion by ***,the management of common infections becomes increasingly arduous,while the likelihood of disease transmission,severe illness,and mortality escalates.

关键词： resistance drugs humanity

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