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High-temperature strength of gel casting silica-based ceramic core

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China Foundry 2025年

作者： Hai-tian Zhang Yan Liu Cheng-dong Wang Zhong-liang Lu Kai miao Sai Li Yu Han Di-chen Li State Key Laboratory of Manufacturing Systems Engineering School of Mechanical Engineering Xi'an Jiaotong University

Considering the fracture problem of the silica-based ceramic core in the integrated casting of hollow turbine blades during directional solidification, the influence of various whiskers, including silicon carbide whiskers,silicon nitride whiskers, and mullite whiskers, on the high-temperature strength of the silica-based ceramic core was investigated. Additionally, the formation of microstructure morphology and phase structure was *** results show that silicon carbide whiskers can reduce the microcracks caused by the shrinkage of cristobalite. During the sintering process, some of the silicon carbide whiskers oxidize and react with aluminum powder to form mullite, which can improve the high-temperature strength of the ceramic cores. When the content of silicon carbide whiskers is 3wt.%, the high-temperature bending strength of the cores reaches the maximum value of 21 MPa. Silicon nitride whiskers decompose in a high-temperature environment and react with aluminum powder in the matrix material to form mullite whiskers. When the content of silicon nitride whiskers is 5wt.%,the high-temperature bending strength of the cores reaches 20 MPa. By adding mullite whiskers, a structure of cristobalite wrapped mullite whiskers can be formed to achieve toughening. When the content of mullite whiskers is 4wt.%, the high-temperature bending strength can reach 17.2 MPa. By comparing the performance of silicon carbide whiskers, silicon nitride whiskers, and mullite whiskers, along with conducting slurry viscosity tests and casting experiments, it is determined that a ceramic slurry containing 4wt.% mullite whiskers is the most suitable for making the cores used in the integrated casting of hollow turbine blades.

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中华眼科杂志 2025年第1期61卷 71-76页

作者：金淼姜利斌首都医科大学附属北京同仁医院北京同仁眼科中心、北京市眼科研究所、北京市眼科学与视觉科学重点实验室北京100730

免疫检查点抑制剂(ICI)作为一种新型靶向治疗药物,在癌症治疗中展示出持久的疗效。然而,部分接受ICI治疗的患者可能会遭受免疫相关不良事件(irAE)的影响。相较于皮肤组织、胃肠道系统等的irAE,神经眼科传出系统的irAE则较为罕见。已报... 详细信息

免疫检查点抑制剂(ICI)作为一种新型靶向治疗药物,在癌症治疗中展示出持久的疗效。然而,部分接受ICI治疗的患者可能会遭受免疫相关不良事件(irAE)的影响。相较于皮肤组织、胃肠道系统等的irAE,神经眼科传出系统的irAE则较为罕见。已报道的神经眼科传出系统irAE主要包括重症肌无力、眼眶眼外肌炎、类甲状腺相关眼病、核间性眼肌麻痹、Miller-Fisher综合征、颅神经不良事件。探讨神经眼科传出系统irAE的可能机制及潜在干预措施对于预测患者irAE风险、制定预防措施以及实施更为有效的临床治疗至关重要。本综述旨在总结神经眼科传出系统irAE的发生机制、临床特征及防治措施,以助于眼科医生和肿瘤科医生早期诊断和管理此类病患。

关键词：免疫检查点抑制剂药物相关性副作用和不良反应眼肌麻痹米勒·费希尔综合征重症肌无力

Design and Performance Analysis of Bionic Blade Vein Structure for the Large Wind Turbine Blade

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Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering 2025年第4期45卷 1521-1531页

作者： Zhu, Haibo miao, Weipao Fan, Shijie Li, Chun Wang, Haisheng Yue, Minnan School of Energy and Power Engineering University of Shanghai for Science and Technology Yangpu District Shanghai200093 China

With reference to the characteristics of plant blade vein distribution, a new wind turbine blade layup design approach is developed by taking advantage of the similarity between plant leaf veins and blade structural functions in order to cope with the high structural performance demand given by the large-scale wind turbine blade. Using computational fluid dynamics and the finite element approach, the modal, structural strength and stability analyses of the bionic blade are carried out. The results show that: compared with the traditional blade, the intrinsic frequency of the bionic blade is increased and the torsional characteristics are stronger. The tip displacement of the bionic blade is greatly reduced, and the surface stress value is reduced, but the web stress is increased. The first six orders of flexion factors of the bionic blade are all increased compared to the conventional blade, suggesting that the plant leaf vein structure is beneficial for improving blade stability. ©2025 *** ***.

关键词： Computational fluid dynamics

Comparative transcriptome analysis identifies key regulators of nitrogen use efficiency in chrysanthemum

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Journal of Integrative Agriculture 2025年第1期24卷 176-195页

作者： Lijiao Ge Weihao miao Kuolin Duan Tong Sun Xinyan Fang Zhiyong Guan Jiafu Jiang Sumei Chen Weimin Fang Fadi Chen Shuang Zhao College of Horticulture Nanjing Agricultural UniversityNanjing 210095China Key Laboratory of Landscaping Ministry of Agriculture and Rural AffairsNanjing 210095China Jiangsu Yanjiang Institute of Agricultural Sciences Nantong 226012China

Nitrogen(N)is a limiting factor that determines the yield and quality of *** variation in N use efficiency(NUE)has been reported among chrysanthemum *** performed a transcriptome analysis of two chrysanthemum genotypes,'Nannonglihuang'(LH,N-efficient genotype)and'Nannongxuefeng"(XF,N-inefficient genotype),under low N(0.4 mmol L^(-1)N)and normal N(8 mmol L^(-1)N)treatments for 15 d and an N recovery treatment for 12 h(low N treatment for 15 d and then normal N treatment for 12 h)to understand the genetic factors impacting NUE in *** two genotypes exhibited contrasting responses to the different N *** N-efficient genotype LH had significant superiority in agronomic traits,N accumulation and glutamine synthase activity under both normal N and low N *** N treatment promoted root growth in LH,but inhibited root growth in *** analysis revealed that the low N treatment increased the expression of some N metabolism genes,genes related to auxin and abscisic acid signal transduction in the roots of both genotypes,as well as genes related to gibberellin signal transduction in roots of *** N recovery treatment just increased the expression of genes related to cytokinin signal transduction in roots of *** expression levels of the NRT2.1,AMT1.1,and Gln1 genes related to gibberellin and cytokinin signal transduction were higher in roots of LH than in XF under different N treatments,suggesting that the genes related to N metabolism and hormone(auxin,abscisic acid,gibberellin,and cytokinin)signal transduction in roots of LH are more sensitive to different N treatments than those of ***-expression network analysis(WGCNA)also identified hub genes like bZIP43,bHLH93,NPF6.3,IBR10,MYB62,PP2C,PP2C06 and NLP7,which may be the key regulators of N-mediated responses in chrysanthemum and play crucial roles in enhancing NUE and resistance to low N stress in the N-efficient chrysanthemum *** results r

关键词： chrysanthemum genotype NUE gene expression transcriptome analysis

Checking weak and strong optimality of the solution to interval convex quadratic program

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Applied Mathematics(A Journal of Chinese Universities) 2021年第2期36卷 172-186页

作者： xia Meng-xue LI miao-miao ZHANG Ben LI Hao-hao Department of Mathematics PLA Army Academy of Atillry and Air DefenseHefei 230031China Wuwei Second Middle School Wuwei 238300China School of Data Sciences Zhejiang University of Finance and EconomicsHangzhou 310018China

In this paper,we investigate three canonical forms of interval convex quadratic pro-gramming *** and suficient conditions for checking weak and strong optimality of given vector corresponding to various forms of feasible region,are established *** using the concept of feasible direction,these conditions are formulated in the form of linear systems with both equations and *** addition,we provide two specific examples to illustrate the efficiency of the conditions.

关键词： interval convex quadratic program weakly optimal solution strongly optimal solution feasible directions

不同供应链结构下基于微分博弈的线上线下渠道竞争策略

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控制与决策 2025年第03期40卷 736-744页

作者：徒君朱淼雨黄敏辽宁工程技术大学理学院无锡学院数字经济与管理学院东北大学信息科学与工程学院

线上渠道与线下渠道在产品价格和服务等方面存在竞争,并受到供应链结构的显著影响.利用微分博弈方法在3类供应链结构下研究线上线下渠道竞争,包括集中式结构、分散式结构和收益共享结构.通过对微分博弈模型的求解获得不同供应链结构下... 详细信息

线上渠道与线下渠道在产品价格和服务等方面存在竞争,并受到供应链结构的显著影响.利用微分博弈方法在3类供应链结构下研究线上线下渠道竞争,包括集中式结构、分散式结构和收益共享结构.通过对微分博弈模型的求解获得不同供应链结构下线上线下零售价格、促销努力和物流努力策略.研究发现:分散式结构提高了线下零售价格、促销努力和线上零售价格,并降低了线上促销努力和物流努力;收益共享结构提高了线下零售价格、促销努力和线上零售价格、物流努力,并降低了线上促销努力;分散式结构和收益共享结构使得电商作出了比线下零售商更小的促销努力并制定更高的零售价格.当物流努力边际贡献充分大时,物流努力的存在总是使得线上产品商誉高于线下.数值实验表明:收益共享结构对线下渠道最有利而集中式结构对线上渠道最有利,物流努力对线上渠道是否有利依赖于其对线上产品商誉的边际贡献.

关键词：渠道竞争微分博弈供应链结构产品商誉促销努力物流努力

Direct Z-scheme CdFe_(2)O_(4)/g-C3N4 hybrid photocatalysts for highly efficient ceftiofur sodium photodegradation

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Journal of Materials Science & Technology 2020年第21期56卷 133-142页

作者： miao-miao Fang Jun-xia Shao xiang-Gang Huang Jin-Yi Wang Wei Chen School of Pharmaceutical and Materials Engineering Taizhou UniversityTaizhou 318000China

A direct Z-scheme CdFe_(2)O_(4)/g-C3N4 hybrid systems with different weight ratios of CdFe2O4 nanoparticles were successfully designed and constructed for ceftiofur sodium *** as-obtained CdFe_(2)O_(4)/g-C_(3)N_(4) hybrid samples composed of CdFe_(2)O_(4) nanoparticles and g-C3N4 nanosheets were systematically characterized by different techniques including X-ray diffraction,scanning electron microscope,transmission electron microscope,Fourier transform infrared spectroscopy,X-ray photoelectron spectroscopy,UV–vis DRS,chemical oxygen demand,inductively coupled plasma mass spectrometer,photochemical test and electron spin resonance spectrometer *** optimal photocatalytic activity for ceftiofur sodium photodegradation was achieved by modulating the weight ration between CdFe_(2)O_(4) nanoparticles and g-C_(3)N_(4) *** result from photocatalytic tests indicate that Cd Fe_(2)O_(4)/g-C_(3)N_(4)-2 hybrid sample exhibit highly efficient photocatalytic activity towards ceftiofur sodium removal in comparison with pristine CdFe_(2)O_(4) nanoparticles and pure g-C_(3)N_(4) *** the excellent photocatalytic stability of CdFe_(2)O_(4)/g-C_(3)N_(4)-2 hybrid sample was also verified during recycling runs towards photocatalytic ceftiofur sodium *** significant enhancement of photocatalytic activity was attributed to the Z-scheme charge separation and transfer based on the construction of tight heterogeneous interface and well-matched band *** expect this research to provide a new insight into the design and preparation of direct Z-scheme hybrid photocatalysts for environmental remediation.

关键词： CdFe2O4 g-C3N4 Z-scheme Photodegradation

Facile formation of Mg-containing interphase on nanosilicon from Agar/MgCO3 precursor for lithium-ion battery anodes

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Progress in Natural Science:Materials International 2025年第01期 177-186页

作者： Ke Zhang Jianhua Zhou Haoran Liu xiaoyang Wang Jie Gao Jun-Liang Chen Haiqing Qin Wenping Liu xiaoxu Lei Lei miao Guangxi Key Laboratory of Information Materials Guangxi Collaborative Innovation Center of Structure and Property for New Energy Materials School of Material Science and Engineering Guilin University of Electronic Technology Novel Battery Materials Research Center of Engineering Technology State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite StructuresSchool of Physical Science and Technology Guangxi University Guangxi Key Laboratory of Superhard Material Guangxi Technology Innovation Center for Special Mineral Material China Nonferrous Metal (Guilin) Geology and Mining Co. Ltd.

The ultra-high theoretical capacity(4200 mAh g-1) of Silicon anode materials for lithium-ion batteries while which is one of the ideal replacement materials for graphite anodes. However, the poor electrical conductivity and greatly reduces the cycle life of the battery of Silicon material, which suffers from severe volume expansion during charge/discharge cycling leading to electrode pulverization. In this work, Agar/magnesium carbonate-coated silicon nanocomposites were synthesized by utilizing the "self-solidifying" property of agar. The magnesium oxide formed by the decomposition of magnesium carbonate at high temperatures mitigates the volume expansion of nanosilicon together with the derived carbon layer. Moreover, the lithium-magnesium alloy electronconducting interface layer generated by the reaction between lithium ions and magnesium oxide, which greatly shortens the diffusion length of lithium ions and electrons inside the electrode during the charge-discharge cycle. The first discharge specific capacity was 2060.2 mAh g-1, the Coulombic efficiency as high as 86.28 %, and still possesses a reversible specific capacity of 801.5 mAh g-1after cycling 200 cycles at a high current of 500 mA g-1of Agar/magnesium@Si with optimal ratio composite. The composite material used in this work largely suppresses the volume expansion of the silicon anode and contributes to the design of low-cost and high Coulombic efficiency lithium-ion batteries.

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Nonreciprocal single-photon scattering mediated by a drivenΛ-type three-level giant atom

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Communications in Theoretical Physics 2024年第11期76卷 113-122页

作者： xiaopei Zhang Haozhen Li ran Zeng miao Hu Mengmeng Xu Xuefang Zhou Yang Lan Xiuwen xia Jingping Xu Yaping Yang School of Communication Engineering Hangzhou Dianzi UniversityHangzhou 310018China Zhejiang Province Key Laboratory of Quantum Technology and Device Zhejiang UniversityHangzhou 310027China Institute of Atomic and Molecular Physics and Functional Materials School of Mathematics and PhysicsJinggangshan UnivsersityJi'an 343009China Key Laboratory of Advanced Micro-Structured Materials of Ministry of Education School of Physics Science and EngineeringTongji UniversityShanghai 200092China

A waveguide-QED with giant atoms,which is capable of accessing various limits of a small one,provides a new paradigm to study photon ***,how to achieve nonreciprocal photon transmissions via such a giant atom setup is highly *** this study,the nonreciprocal single-photon scattering characteristics of a double-drivenΛ-type three-level giant atom,where one of the transition couples to a 1D waveguide at two separate points,and the other is driven by two coherent driving fields,are *** is found that a frequency-tunable single-photon diode with an ideal contrast ratio can be achieved by properly manipulating the local coupling phases between the giant atom and the waveguide,the accumulation phase between the two waveguide coupling points,the Rabi frequencies and phase difference of the two driven *** to the previous single driving schemes,on the one hand,the presence of the second driving field can provide more tunable parameters to manipulate the nonreciprocal single-photon scattering *** the other hand,here perfect nonreciprocal transmission for photons with arbitrary frequencies is achievable by tuning the driving phases while the two driving fields keep on turning,which provides an alternative way to control the nonreciprocal single-photon ***,the results reveal that both the location and width of each optimal nonreciprocal transmission window is also sensitive to the driving detuning,and a single-photon diode with wide or narrow bandwidth can be realized based on *** results may be beneficial for designing nonreciprocal single-photon devices based on a double-driven giant atom setup.

关键词： giant atom nonreciprocal single-photon scattering waveguide-QED