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Regression a.a.ysis of squeezing-induced hybrid nanofluid flow in Darcy-Forchheimer porous medium

Applied mathematics and mechanics(English Edition) 2025年第1期46卷 193-208页

作者： k.mUHAmmAD m.SARFRAZ Department of Humanities and Sciences School of Electrical Engineering and Computer Science National University of Sciences and Technology Department of mathematics Quaid-i-Azam University

This article presents a mathematical model addressing a scenario involving a hybrid nanofluid flow between two infinite pa.a.lel plates. One plate remains stationary, while the other moves downward at a squeezing velocity. The space between these plates contains a Darcy-Forchheimer porous medium. A mixture of water-based fluid with gold(Au) and silicon dioxide(Si O2) nanoparticles is formulated. In contrast to the conventional Fourier's heat flux equation, this study employs the Cattaneo-Christov heat flux equation. A uniform magnetic field is applied perpendicular to the flow direction, invok.ng magnetohydrodynamic(mHD) effects. Further, the model accounts for Joule heating, which is the heat generated when an electric current passes through the fluid. The problem is solved via NDSolve in mATHEmATICA. Numerical and statistical a.a.yses are conducted to provide insights into the behavior of the nanomaterials between the pa.a.lel plates with respect to the flow, energy transport, and sk.n *** findings of this study have potential applications in enhancing cooling systems and optimizing thermal ma.a.ement strategies. It is observed that the squeezing motion generates additional pressure gradients within the fluid, which enhances the flow rate but reduces the frictional drag. Consequently, the fluid is pushed more vigorously between the plates, increasing the flow velocity. As the fluid experiences higher flow rates due to the increased squeezing effect, it spends less time in the region between the plates. The thermal rela.a.ion, however, abruptly changes the temperature, leading to a decrease in the temperature fluctuations.

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Tribonacci Partition Formulas modulo m

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Acta mathematica Sinica,English Series 2010年第3期26卷 465-476页

作者： Ji■í k.A■k. Institute of mathematics Brno University of Technology

Each Tribonacci sequence starting with an arbitrary triple of integers is periodic modulo m for any modulus m 〉 1. For a given m, the mapping between the set S of all m^3 triples of initial values and the set of their coresponding periods define a partition of the set S. In this paper we shall investigate some basic questions related to these partitions from the point of view of enumerative combinatorics.

关键词： Tribonacci sequence modular periodicity partition formulas

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Interfacial Zn2+-solvation regulator towards reversible and stable Zn anode

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Journal of Energy Chemistry 2025年第1期100卷 684-692页

作者： miao Zhou Xiongbin Luo Hang li Shan Guo Zhuang Tong Xiaotao Zhou Xu li Zhaohui Hou Shuquan liang Guozhao Fang College of mechanical Engineering Key Laboratory of Hunan Province for Advanced Carbon-based Functional Materials Hunan Institute of Science and Technology School of materials Science and Engineering Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province Central South University College of materials and metallurgy Guizhou University National Energy metal Resources and New materials k.y Laboratory Central South University

Aqueous zinc-ion batteries （AZIBs） are fundamentally challenged by the instability of the electrode/electrolyte interface,predominantly due to irreversible zinc （Zn） deposition and hydrogen ***,the intricate mechanisms behind the electrochemical discrepancies induced by interfacial Zn2+-solvation and deposition behavior demand comprehensive *** molecules endowed with special functional groups （such as hydroxyl,carboxyl,etc.） have the potential to significantly optimize the solvation structure of Zn2+and regulate the interfacial electric double layer （EDL）.By increasing nucleation overpotential and decreasing interfacial free energy,these functional groups facilitate a lower critical nucleation radius,thereby forming an asymptotic nucleation model to promote uniform Zn ***,this study presents a pioneering approach by introducing trace amounts of n-butanol as solvation regulators to engineer the homogenized Zn （H-Zn） anode with a uniform and dense *** interfacial reaction and structure evolution are explored by in/ex-situ experimental techniques,indicating that the H-Zn anode exhibits dendrite-free growth,no by-products,and weak.hydrogen evolution,in sharp contrast to the bare ***,the H-Zn anode achieves a remark.ble Zn utilization rate of approximately 20% and simultaneously sustains a prolonged cycle life exceeding 500 ***,the H-Zn//NH4V4O10（NVO） full battery showcases exceptional cycle stability,retaining 95.04%ca.a.ity retention after 400 cycles at a large current density of 5 A *** study enlightens solvation-regulated additives to develop Zn anode with superior utilization efficiency and extended operational lifespan.

关键词： Aqueous zinc-ion batteries Interfacial reaction Asymptotic nucleation model Reversible and stable Zn anode

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2022年中国新生儿协作网极早产儿红细胞输注现况分析

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中华儿科杂志 2025年第1期63卷 55-61页

作者：莫艳钱爱民白瑞苗李淑涓玉小清王瑾 Lee Shoo k. 蒋思远韦秋芬周文浩国家儿童医学中心复旦大学附属儿科医院新生儿科上海南京医科大学附属儿童医院新生儿医疗中心南京西北妇女儿童医院新生儿科西安广西壮族自治区妇幼保健院新生儿医疗中心南宁加拿大西奈山医院母婴健康研究中心多伦多M5GX 广州市妇女儿童医疗中心新生儿医学中心广州

目的分析2022年中国新生儿协作网(CHNN)各单位极早产儿(出生胎龄<32周)红细胞输注治疗的状况。方法基于CHNN极早产儿队列的横断面研究, 纳入2022年生后24 h内收入CHNN 89家单位的6 985例极早产儿。排除合并严重先天畸形及放弃治疗或转至... 详细信息

目的分析2022年中国新生儿协作网(CHNN)各单位极早产儿(出生胎龄k.usk.l-WallisH检验及mann-WhitneyU检验等进行组间比较, 采用Cochran-Armitage和Jonck.eere-Terpstra趋势检验进行不同出生胎龄及不同呼吸支持水平间的趋势检验。结果 6 985例极早产儿中男3 865例(55.3%), 出生胎龄为30.0(28.6, 31.0)周, 出生体重为(1 302±321)g。红细胞输注组3 617例(51.8%), 未输注组3 368例(48.2%)。出生胎龄<28、28～31周的极早产儿红细胞输注率分别为77.7%(893/1 150)、46.7%(2 724/5 835)。红细胞输注组极早产儿共接受9 616次红细胞输注, 输注时需有创呼吸支持的有2 459次(25.6%), 无创呼吸支持4 934次(51.3%), 无呼吸支持的有2 223次(23.1%)。因632次红细胞输注输血前血红蛋白未记录, 8 984次红细胞输注纳入分析。红细胞输注组母亲合并妊娠期高血压比例高于未输注组(χ2=10.73, P=0.001), 剖宫产出生、母亲产前激素应用比例均低于未输注组(χ2=12.00、12.93, 均P<0.001);与未输注组相比, 红细胞输注组患儿出生胎龄更小、出生体重更低, 小于胎龄、多胎以及第5分钟Apgar评分≤3分比例均更高, 女性、本院出生以及延迟脐带结扎比例均更低, 入院时生理稳定性转运风险指数评分更高(均P<0.05)。红细胞输注组极早产儿红细胞输注次数为2(1, 3)次, 首次红细胞输注时为18(8, 29)日龄, 首次红细胞输注前血红蛋白为97(86, 109)g/L。红细胞输注时≤7日龄的极早产儿有创呼吸支持、无创呼吸支持和无呼吸支持组接受红细胞输注前的血红蛋白水平差异无统计学意义(H=5.59, P=0.061);8～21以及≥22日龄的极早产儿不同呼吸支持状况下接受红细胞输注前的血红蛋白水平差异均有统计学意义(H=10.91、39.19, 均P<0.01)。8～21日龄、≥22日龄无呼吸支持的极早产儿阈值上红细胞输注分别为90.1%(264/293)、91.1%(1 578/1 732)。阈值上输血组极早产儿相比阈值下输血组发生坏死性小肠结肠炎的比例更高(χ2=10.59, P=0.001), 住院时间更长(Z=4.67, P<0.001)。结论 2022年CHNN纳入的极早产儿红细胞输注率较高, 接受红细胞输注前的血红蛋白水平普遍高于现有证据推荐的输注阈值。

关键词：婴儿, 早产红细胞输注重症监护病房, 新生儿

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Tensile and Impact Properties of Shielded metal Arc Welded AISI 409m Ferritic Stainless Steel Joints

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Journal of materials Science & Technology 2009年第2期25卷 181-186页

作者： k. Shanmugam A.k. Lak.hmina.a.a.a. V. Ba.a.ubra.a.ian Centre for materials Joining & Research (CEmAJOR) Department of Manufacturing Engineering Annamalai UniversityAnnamalai Nagar 608 002 Tamil Nadu India

The present study is concerned with the effect of filler metals such as austenitic stainless steel, ferritic stainless steel and duplex stainless steel on tensile and impact properties of the ferritic stainless steel conforming to AISI 409m grade. Rolled plates of 4 mm thick.ess were used as the base material for preparing single pass butt welded joints. Tensile and impact properties, microhardness, microstructure and fracture surface morphology of the joints fabricated by austenitic stainless steel, ferritic stainless steel and duplex stainless steel filler metals were evaluated and the results were reported. From this investigation, it is found that the joints fabricated by duplex stainless steel filler metal showed higher tensile strength and hardness compared to the joints fabricated by austenitic and ferritic stainless steel filler metals. Joints fabricated by austenitic stainless steel filler metal exhibited higher ductility and impact toughness compared with the joints fabricated by ferritic stainless steel and duplex stainless steel filler metals.

关键词： Ferritic stainless steel Shielded metal arc welding Tensile properties Impact toughness

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Approximate Bound States Solution of the Hellmann Potential

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Communications in Theoretical Physics 2013年第7期60卷 1-8页

作者： m. Hamzavi k.E. Thylwe and a.a. Ra.a.i Department of Science and Engineering Abhar Branch Islamic Azad University k.H-mechanics Royal Institute of Technology Physics Department Shahrood University of Technology

The Hellmann potential, which is a superposition of an attractive Coulomb potential -air and a Yutmwa potential b e-δr /r , is often used to compute bound-state normalizations and energy levels of neutral atoms. By using the generalized pa.a.etric Nik.forov-Uvarov （NU） method, we have obtained the approximate a.a.ytical solutions of the radial Schr6dinger equation （SE） for the Hellmann potential. The energy eigenvalues and corresponding eigenfunctions are calculated in closed forms. Some numerical results are presented, which show good agreement with a numerical amplitude phase method and also those previously obtained by other methods. As a particular case, we find the energy levels of the pure Coulomb potential.

关键词： Schrodinger equation Hellmann potential Nik.forov-Uvarov method

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Enhancing m^(6)A modification in the motor cortex facilitates corticospinal tract remodeling after spinal cord injury

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Neural Regeneration Research 2025年第6期20卷 1749-1763页

作者： Tian Qin Yuxin Jin Yiming Qin Feifei Yuan Hongbin Lu Jianzhong Hu Yong Cao Chengjun li Department of Spine Surgery and Orthopedics Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina k.y Laboratory of Organ Injury Aging and Regenerative Medicine of Hunan ProvinceChangshaHunan ProvinceChina National Clinical Research Center for Geriatric Disorders Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina Department of Sports medicine Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina

Spinal cord injury typically causes corticospinal tract disruption. Although the disrupted corticospinal tract can self-regenerate to a certain degree, the underlying mechanism of this process is still unclear. N6-methyladenosine(m^(6)A) modifications are the most common form of epigenetic regulation at the RNA level and play an essential role in biological processes. However, whether m^(6)A modifications participate in corticospinal tract regeneration after spinal cord injury remains unk.own. We found that expression of methyltransferase 14 protein(mETTL14) in the locomotor cortex was high after spinal cord injury and accompanied by elevated m^(6)A levels. k.ock.own of mettl14 in the locomotor cortex was not favorable for corticospinal tract regeneration and neurological recovery after spinal cord injury. Through bioinformatics a.a.ysis and methylated RNA immunoprecipitation-quantitative polymerase chain reaction, we found that mETTL14 regulated Trib2 expression in an m^(6)A-regulated manner, thereby activating the mitogen-activated protein k.nase pathway and promoting corticospinal tract regeneration. Finally, we administered syringin, a stabilizer of mETTL14, using molecular dock.ng. Results confirmed that syringin can promote corticospinal tract regeneration and facilitate neurological recovery by stabilizing mETTL14. Findings from this study reveal that m^(6)A modification is involved in the regulation of corticospinal tract regeneration after spinal cord injury.

关键词： corticospinal tract remodeling epigenetic regulations locomotor cortex m^(6)A modification methyltransferase 14 protein(mETTL14) mitogen-activated protein k.nase neural regeneration spinal cord injury syringin TRIB2

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Salsolinol as an RNA m~6A methylation inducer mediates dopaminergic neuronal death by regulating YAP1 and autophagy

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Neural Regeneration Research 2025年第3期20卷 887-899页

作者： Jia.a. Wang Yuanyuan Ran Zihan li Tianyuan Zhao Fangfang Zhang Juan Wang Zongjian liu Xuechai Chen Beijing International Science and Technology Cooperation Base for Antiviral Drugs College of Chemistry and LifeBeijing University of TechnologyBeijingChina Department of Rehabilitation Beijing Rehabilitation HospitalCapital Medical UniversityBeijingChina

Salsolinol(1-methyl-6,7-dihydroxy-1,2,3,4-tetrahydroisoquinoline,Sal)is a catechol isoquinoline that causes neurotoxicity and shares structural similarity with 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine,an environmental toxin that causes Park.nson's ***,the mechanism by which Sal mediates dopaminergic neuronal death remains *** this study,we found that Sal significantly enhanced the global level of N~6-methyladenosine(m~6A)RNA methylation in PC12 cells,mainly by inducing the downregulation of the expression of m~6A demethylases fat mass and obesity-associated protein(FTO)and alk.B homolog 5(ALk.H5).RNA sequencing a.a.ysis showed that Sal downregulated the Hippo signaling *** m~6A reader YTH domain-containing family protein 2(YTHDF2)promoted the degra.a.ion of m~6A-containing Yes-associated protein 1(YAP1)mRNA,which is a downstream k.y effector in the Hippo signaling ***,downregulation of YAP1 promoted autophagy,indicating that the mutual regulation between YAP1 and autophagy can lead to *** findings reveal the role of Sal on m~6A RNA methylation and suggest that Sal may act as an RNA methylation inducer mediating dopaminergic neuronal death through YAP1 and *** results provide greater insights into the neurotoxic effects of catechol isoquinolines compared with other studies and may be a reference for assessing the involvement of RNA methylation in the pathogenesis of Park.nson's disease.

关键词： ALk.H5 autophagy FTO Hippo pathway m~6A Park.nson's disease RNA methylation salsolinol YAP1 YTHDF2

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Error code a.a.ysis and selection principle of m-ary modulation in network.based control systems

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Journal of Central South University 2016年第6期23卷 1372-1382页

作者：赵顺利尹逊和魏学业 H. k. LAm School of Electronic and Information Engineering Beijing Jiaotong University Beijing 100044 China Department of Informatics King's College London London WC2R 2LS U. K

Error codes induced by m-ary modulation and modulation selection in network.based control systems are *** is the first time the issue of error codes induced by m-ary modulation is addressed in control *** network.based control systems,error codes induced by noisy channel can significantly decrease the quality of *** solve this problem,the network.based control system with delay and noisy channel is firstly modeled as an asynchronous dynamic system(ADS).Secondly,conditions of pack.t with error codes(PEC)loss rate by using m-ary modulation are obtained based on dynamic output feedback.***,more importantly,the selection principle of m-ary modulation is proposed according to the measured signal-to-noise ratio(SNR)and conditions of PEC loss ***,system stability is a.a.yzed and controller is designed through Lyapunov function and linear matrix inequality(LmI)scheme,and numerical simulations are made to demonstrate the effectiveness of the proposed scheme.

关键词： network.based control system asynchronous dynamic system (ADS) m-ary modulation delay error code linear matrix inequality (LmI)

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Ultra‑High Sensitivity Anisotropic Piezoelectric Sensors for Structural Health monitoring and Robotic Perception

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Nano-micro Letters 2025年第2期17卷 432-446页

作者： Hao Yin Yanting li Zhiying Tian Qichao li Chenhui Jiang Enfu liang Yiping Guo State k.y Laboratory of metal matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China Beijing Vacuum Electronics Research Institute Beijing 100015People’s Republic of China Fundamental Science On Vibration Shock and Noise LaboratoryState Key Laboratory of Mechanical System and VibrationSchool of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

monitoring minuscule mechanical signals,both in magnitude and direction,is imperative in many application scenarios,e.g.,structural health monitoring and robotic sensing ***,the piezoelectric sensor struggles to satisfy the requirements for directional recognition due to the limited piezoelectric coefficient matrix,and achieving sensitivity for detecting micrometer-scale deformations is also ***,we develop a vector sensor composed of lead zirconate tita.a.e-electronic grade glass fiber composite filaments with oriented arrangement,ca.a.le of detecting minute anisotropic *** as-prepared vector sensor can identify the deformation directions even when subjected to an unprecedented nominal strain of 0.06%,thereby enabling its utility in accurately discerning the 5μm-height wrink.es in thin films and in monitoring human pulse *** ultra-high sensitivity is attributed to the formation of porous ferroelectret and the efficient load transfer efficiency of continuous lead zirconate tita.a.e ***,when integrated with machine learning techniques,the sensor’s ca.a.ility to recognize multi-signals enables it to differentiate between 10 types of fine textures with 100%*** structural design in piezoelectric devices enables a more comprehensive perception of mechanical stimuli,offering a novel perspective for enhancing recognition accuracy.

关键词： Flexible piezoelectric filaments Anisotropic Ultra-high sensitivity Structural health detection Texture recognition

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