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非对称型波纹通道流动与传热性能的数值模拟

哈尔滨工程大学学报 2020年第7期41卷 998-1004页

作者：韩怀志于瑞天廖文君四川大学化学工程学院四川成都610065 哈尔滨工程大学动力与能源工程学院黑龙江哈尔滨150001

为了探究波纹通道倒角连接处对流动和传热性能的影响,本文针对非对称波纹通道中大波谷半径(rl)位于来流侧和去流侧进行了数值模拟研究。比较了不同雷诺数下对称型与非对称型波纹通道壁表面平均及局部表面特征数的变化规律。结果表明:壁... 详细信息

为了探究波纹通道倒角连接处对流动和传热性能的影响,本文针对非对称波纹通道中大波谷半径(rl)位于来流侧和去流侧进行了数值模拟研究。比较了不同雷诺数下对称型与非对称型波纹通道壁表面平均及局部表面特征数的变化规律。结果表明:壁表面平均努塞尔数(Nu)与局部努塞尔数(Nux)皆随雷诺数(Re)的增大而增大,且对称型波纹通道壁面Nu的增长速率大于非对称型波纹通道;壁表面平均摩擦系数(f)与局部摩擦系数(fx)皆随Re的增大而减小,且非对称型波纹通道f下降速度相比对称型小。非对称型通道的Nu略小于对称型通道,但f却大幅度降低。2种非对称型比较时,大波谷半径位于来流侧时流速较小且涡旋范围较小,温度边界层略厚,压力梯度的转换较小,湍动能整体较小。鉴于上述研究,在换热器设计上建议选择rl位于去流侧通道以提高整体性能系数。

关键词：波纹通道板式换热器强化换热传热机理数值模拟非对称湍流流动流动特性

Oligomer-specific single chain variable fragment antibody attenuates memory deficits and brain amyloid burden in Alzheimer disease transgenic mice

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中国药理通讯 2013年第2期30卷 35-37页

作者： Min Zhao Shaowei Wang Yajing Su Weiwei Zhou Xiaolin yu ruitian Liu National Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences

内插松弛扭带波节管的流动与传热特性的数值模拟

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化工学报 2018年第4期69卷 1374-1384页

作者：韩怀志陈鑫胡怡然王坤芳崔运磊于瑞天哈尔滨工程大学动力与能源工程学院黑龙江哈尔滨150001 哈尔滨工业大学能源科学与工程学院黑龙江哈尔滨150001

采用RNG k-ε数值模拟方法研究一种新型内插松弛扭带波节管(CLT)的流动与传热特性。将数值模拟结果与自建实验台的实验结果进行了对比验证;比较了CLT和内插松弛扭带光管(SLT)的传热性能差异;考察了CLT中扭率和余隙比对流动和传热特性的... 详细信息

采用RNG k-ε数值模拟方法研究一种新型内插松弛扭带波节管(CLT)的流动与传热特性。将数值模拟结果与自建实验台的实验结果进行了对比验证;比较了CLT和内插松弛扭带光管(SLT)的传热性能差异;考察了CLT中扭率和余隙比对流动和传热特性的影响规律。研究结果表明CLT相比于传统的SLT,传热性能最多提高1.17倍,综合传热性能的绝对数值最多增加0.15。CLT的综合传热性能随着扭率的增加而增加,而增加的幅度却逐渐减小,高Reynolds数时减小的程度更加显著。同时,综合传热性能随着余隙比的增大而降低并且降低的幅度也逐渐减小,在低Reynolds数时明显降低,而在高Reynolds数时略微降低。综合考虑,低Reynolds数时应该选择余隙比低的扭带,而高Reynolds数时则应选择余隙比高的扭带。

关键词：内插松弛扭带波节管 RNGk-ε模型数值模拟流动和传热特性综合传热性能

分析超声内镜辅助下行黏膜下肿瘤内镜治疗的价值

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数理医药学杂志 2020年第7期33卷 982-983页

作者：余锐填关佩玲开平市中心医院消化内科开平529300

目的:探究并分析超声内镜辅助下行黏膜下肿瘤内镜治疗的应用价值。方法:随机选择某院2017年12月~2019年4月收治的110例疑似胃粘膜下肿瘤患者为研究对象,并根据患者病情采取合适的内镜微创治疗方式,手术结束后为患者进行病理切片以及免... 详细信息

目的:探究并分析超声内镜辅助下行黏膜下肿瘤内镜治疗的应用价值。方法:随机选择某院2017年12月~2019年4月收治的110例疑似胃粘膜下肿瘤患者为研究对象,并根据患者病情采取合适的内镜微创治疗方式,手术结束后为患者进行病理切片以及免疫组化的检查。结果:根据对患者进行的内镜检查结果,高频电刀治疗20例,黏膜剥离术10例,黏膜切除术20例,套扎治疗60例;术后通过超声内镜诊断,并与术后病理性质进行比较,其符合率为94.7%,来源层次符合率为95.8%。结论:根据结果显示,超声内镜辅助下行黏膜下肿瘤内镜微创治疗具有很高的临床效果,其安全性也具有极大的保障。

关键词：超声内镜黏膜下肿瘤内镜治疗

Silk damping in scalar-induced gravitational waves: a novel probe for new physics

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 79-85页

作者： Yan-Heng yu Sai Wang Theoretical Physics Division Institute of High Energy Physics Chinese Academy of Sciences School of Physics University of Chinese Academy of Sciences

Silk damping is well known in the study of cosmic microwave background（CMB） and accounts for suppression of the angular power spectrum of CMB on large angular multipoles. In this article, we study the effect of Silk damping on the scalar-induced gravitational waves（SIGWs）. Resulting from the dissipation of cosmic fluid, the Silk damping notably suppresses the energydensity spectrum of SIGWs on scales comparable to a diffusion scale at the decoupling time of weakly-interacting particles. The effect offers a novel observable for probing the underlying particle interaction, especially for those mediated by heavy gauge bosons beyond the standard model of particles. We anticipate that pulsar timing arrays are sensitive to gauge bosons with mass ～10～3-10～4 GeV, while space-and ground-based interferometers to those with mass ～10～7-1012GeV, leading to essential complements to on-going and future experiments of high-energy physics.

关键词： scalar-induced gravitational waves Silk damping new physics

Interconnections between diabetic corneal neuropathy and diabetic retinopathy:diagnostic and therapeutic implications

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Neural Regeneration Research 2025年第8期20卷 2169-2180页

作者： Mingyi yu Faith Teo En Ning Chang Liu yu-Chi Liu Tissue Engineering and Stem Cell Group Singapore Eye Research InstituteSingapore Yong Loo Lin School of Medicine National University of SingaporeSingapore Department of Cornea and External Eye Disease Singapore National Eye CenterSingapore Ophthalmology and Visual Sciences Academic Clinical Program Duke-NUS Medical SchoolSingapore

Diabetic corneal neuropathy and diabetic retinopathy are ocular complications occurring in the context of diabetes *** corneal neuropathy refers to the progressive damage of corneal *** retinopathy has traditionally been considered as damage to the retinal ***,growing evidence suggests that diabetic retinopathy is a complex neurovascular disorder resulting from dysfunction of the neurovascular unit,which includes both the retinal vascular structures and neural *** retinopathy is one of the leading causes of blindness and is frequently screened for as part of diabetic ocular ***,diabetic corneal neuropathy is commonly overlooked and underdiagnosed,leading to severe ocular surface *** studies have found that these two conditions tend to occur together,and they share similarities in their pathogenesis pathways,being triggered by a status of chronic *** review aims to discuss the interconnection between diabetic corneal neuropathy and diabetic retinopathy,whether diabetic corneal neuropathy precedes diabetic retinopathy,as well as the relation between the stage of diabetic retinopathy and the severity of corneal *** also endeavor to explore the relevance of a corneal screening in diabetic eyes and the possibility of using corneal nerve measurements to monitor the progression of diabetic retinopathy.

关键词： cornea corneal nerves diabetes diabetic corneal neuropathy diabetic retinopathy retina

Attention Eraser and Quantitative Measures for Automated Bone Age Assessment

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Computers, Materials & Continua 2025年第1期82卷 627-644页

作者： Liuqiang Shu Lei yu College of Computer and Information Science Chongqing Normal UniversityChongqing401331China

Bone age assessment(BAA)aims to determine whether a child’s growth and development are normal concerning their chronological *** predict bone age more accurately based on radiographs,and for the left-hand X-ray images of different races model can have better adaptability,we propose a neural network in parallel with the quantitative features from the left-hand bone measurements for *** this study,a lightweight feature extractor(LFE)is designed to obtain the featuremaps fromradiographs,and amodule called attention erasermodule(AEM)is proposed to capture the fine-grained ***,the dimensional information of the metacarpal parts in the radiographs is measured to enhance the model’s generalization capability across images fromdifferent *** is trained and validated on the RSNA,RHPE,and digital hand atlas datasets,which include images from various racial *** model achieves a mean absolute error(MAE)of 4.42 months on the RSNA dataset and 15.98 months on the RHPE *** to ResNet50,InceptionV3,and several state-of-the-art methods,our proposed method shows statistically significant improvements(p<0.05),with a reduction in MAE by 0.2±0.02 years across different racial ***,t-tests on the features also confirm the statistical significance of our approach(p<0.05).

关键词： Bone age assessment attention eraser quantitative feature metacarpal bones

Tilting homeostatic and dyshomeostatic microglial balance in health and disease:transforming growth factor-beta1 as a critical protagonist

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Neural Regeneration Research 2025年第10期20卷 2895-2897页

作者： Nicolas Hugues yu Luo Department of Molecular and Cellular Biosciences University of CincinnatiCincinnatiOHUSA Neuroscience Graduate Program University of CincinnatiCincinnatiOHUSA Division of Immunobiology Cincinnati Children’s Hospital Medical CenterUniversity of Cincinnati College of MedicineCincinnatiOHUSA

Adult microglia,by continuously sensing changes in their environment and communicating with nearly all brain cell types,are considered to be the immune sentinels of the *** the healthy central nervous system(CNS),microglia display a unique molecular homeostatic signature(i.e.,Tmem119,P2ry12,Sall1,Siglech,Gpr34,and Hexb)(Figure 1A).

关键词： Figure signature critical

Conversion-type cathode materials for high energy density solid-state lithium batteries

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Journal of Energy Chemistry 2025年第1期100卷 409-425页

作者： yuhao Ma Shihong Qing Hongyu Liu Chuntao Ma yuan yu Chuang yu Liping Wang School of Materials and Energy University of Electronic Science and Technology of China Zhejiang Provincial Key Laboratory of Fiber Materials and Manufacturing Technology Zhejiang Sci-Tech University State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology

Solid-state lithium batteries （SSLBs） are regarded as an essential growth path in energy storage systems due to their excellent safety and high energy *** particular,SSLBs using conversion-type cathode materials have received widespread attention because of their high theoretical energy densities,low cost,and *** the great progress in research and development of SSLBs based on conversiontype cathodes,their practical applications still face challenges such as blocked ionic-electronic migration pathways,huge volume change,interfacial incompatibility,and expensive processing *** review focuses on the advantages and critical issues of coupling conversion-type cathodes with solid-state electrolytes （SSEs）,as well as state-of-the-art progress in various promising cathodes （e.g.,FeS2,CuS,FeF3,FeF2,and S） in ***,representative research on conversion-type solid-state full cells is discussed to offer enlightenment for their practical ***,the energy density exhibited by the S cathode stands out impressively,while sulfide SSEs and halide SSEs have demonstrated immense potential for coupling with conversion-type ***,perspectives on conversion-type cathodes are provided at the material,interface,composite electrode,and battery levels,with a view to accelerating the development of conversion-type cathodes for high-energy–density SSLBs.

关键词： Sulfur compounds