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STRESS INTENsiTY FACTORS CALCULATION IN ANTI-PLANE FRACTURE PROBLEM BY ORTHOgONAL INTEgRAL EXTRACTION METHOD BASED ON FEMOL

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Acta Mechanica Solida sinica 2007年第1期20卷 87-94页

作者： Xu Yongjun Yuau si Institute of Mechanics Chinese Academy of Sciences Beifing 100080 China Department of Civil Engineering Tsinghua University Beijing 100084 China

For an anti-plane problem, the differential operator is self-adjoint and the corresponding eigenfunctions belong to the Hilbert space. The orthogonal property between eigenfunctions （or between the derivatives of eigenfunctions） of anti-plane problem is exploited. We developed for the first time two sets of radius-independent orthogonal integrals for extraction of stress intensity factors （siFs）, so any order siF can be extracted based on a certain known solution of displacement （an analytic result or a numerical result）. Many numerical examples based on the finite element method of lines （FEMOL） show that the present method is very powerful and efficient.

关键词： anti-plane problem Hilbert space eigenvalue eigenfunction orthogonal relationship stress intensity factor finite element method of lines

simplified Numerical Models of the Unsteady Tip Leakage Flow in Compressor

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Journal of Thermal Science 2023年第6期32卷 2386-2399页

作者： si Changxin WU Zihao LIU Xiaohua School of Aeronautics and Astronautics Shanghai Jiao Tong UniversityShanghai200240China China Three gorges Investment Management Co. Ltd.Shanghai200124China Key Laboratory of Aerodynamic Noise Control China Aerodynamics Research and Development CenterMianyang621000China

Tip leakage flow(TLF)in compressors,which can cause flow blockage in blade passage and induce efficiency loss,is also a potential threat to the unsteady flow stability of modern *** paper provides an overview of the significance of tip leakage flow research,and introduces relevant previous *** calculating by different methods,large eddy simulation(LES)is demonstrated again as a suitable compromise between accuracy and computational cost for the unsteady flow *** types of simplified tip leakage flow models using LES are adopted with a focus on the unsteady characteristics of shedding vortices in a cavity *** paper applies these models to study the unsteady tip leakage flow which triggers the onset of acoustic resonance in a multistage axial *** with the detected acoustic resonance frequency of 5.22 rotational frequency(RF)in the previous experiment,the computed combination frequency in the 2-D model is equal to 5.232RF,and the simplified 3-D unsteady tip leakage flow model results in a combination frequency of ***,based on the small relative error between model results and experimental results,the simplified numerical models are validated to be sufficiently accurate,and theoretically provide a useful basis for the subsequent research of unsteady tip leakage flow in turbomachinery.

关键词： turbomachinery compressor tip leakage flow unsteady flow

Structural Manipulation of Aminal-crosslinked Polybutadiene for Recyclable and Healable Elastomers

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Chinese Journal of Polymer Science 2021年第10期39卷 1337-1344,I0008页

作者： Zheng-Hai Tang Hui Zeng si-Qi Wei si-Wu Wu Bao-Chun guo Department of Polymer Materials and Engineering South China University of TechnologyGuangzhou 510640China

Recently,increasingly growing efforts have been devoted to incorporating dynamic covalent bonds into covalently crosslinked networks to address the persistent trade-offs between chemical crosslinking and ***,a series of dynamic aminal bond crosslinked polybutadiene rubbers(PAPB)are prepared by crosslinking aldehyde group-terminated polybutadiene rubber(APB)with *** varying the molecular weight of APB,the crosslinking density of PAPB is changed,which offers the platform to regulate the mechanical characteristics and dynamic ***,with the decrease of APB molecular weight,*** the increase of crosslinking density,the modulus of PAPB gradually increases while the elongation at break conversely decreases,and the activation energy for network rearrangement initially decreases and then *** resultant PAPB exhibit vitrimer-like behaviors that can alter the network topologies at elevated temperatures without the loss of structural integrity through dissociative aminal exchange reactions,while the protic source can accelerate aminal dissociation and result in network dissolution even at room *** to the aminal exchange,PAPB are thermally malleable and can almost restore the original mechanical characteristics after recycling;besides,they are capable of healing at a relatively low crosslinking density.

关键词： Aminal Recyclability Healing Structural manipulation Dynamic covalent network

PP-gAN:Style Transfer from Korean Portraits to ID Photos Using Landmark Extractor with gAN

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Computers, Materials & Continua 2023年第12期77卷 3119-3138页

作者： Jongwook si Sungyoung Kim Department of Computer AI Convergence Engineering Kumoh National Institute of TechnologyGumi39177Korea Department of Computer Engineering Kumoh National Institute of TechnologyGumi39177Korea

The objective of style transfer is to maintain the content of an image while transferring the style of another ***,conventional methods face challenges in preserving facial features,especially in Korean portraits where elements like the“gat”(a traditional Korean hat)are *** paper proposes a deep learning network designed to perform style transfer that includes the“gat”while preserving the identity of the *** traditional style transfer techniques,the proposed method aims to preserve the texture,attire,and the“gat”in the style image by employing image sharpening and face landmark,with the *** color,texture,and intensity were extracted differently based on the characteristics of each block and layer of the pre-trained Vgg-16,and only the necessary elements during training were preserved using a facial landmark *** head area was presented using the eyebrow area to transfer the“gat”.Furthermore,the identity of the face was retained,and style correlation was considered based on the gram *** evaluate performance,we introduced a metric using PSNR and SsiM,with an emphasis on median values through new weightings for style transfer in Korean ***,we have conducted a survey that evaluated the content,style,and naturalness of the transferred results,and based on the assessment,we can confidently conclude that our method to maintain the integrity of content surpasses the previous *** approach,enriched by landmarks preservation and diverse loss functions,including those related to“gat”,outperformed previous researches in facial identity preservation.

关键词： Style transfer style synthesis generative adversarial network(gAN) landmark extractor ID photos Korean portrait

表面印迹微球在水相介质样品前处理中的应用研究进展

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分析测试学报 2025年第1期44卷 61-72页

作者：王思涛刘智敏许志刚昆明理工大学理学院云南昆明650500

氢键通常是分子印迹聚合物识别模板分子的主要机制,由于水分子等诸多影响因素带来的干扰,有效识别水环境中的分析物一直是分子印迹技术面临的一大挑战。表面印迹微球具有比表面积大和易于修饰等特性,能够被灵活运用以满足各种水相样品... 详细信息

氢键通常是分子印迹聚合物识别模板分子的主要机制,由于水分子等诸多影响因素带来的干扰,有效识别水环境中的分析物一直是分子印迹技术面临的一大挑战。表面印迹微球具有比表面积大和易于修饰等特性,能够被灵活运用以满足各种水相样品前处理的需求,是克服水相识别困难的有效方法之一。该文综述了近年来水相识别表面印迹微球的各种制备策略及其代表性应用,包括不同基底、亲水性识别、非氢键的协同识别和基于特殊组件的表面印迹微球;从作用力和识别机制层面讨论了在水相介质中识别分子时的干扰因素及其调控策略,并进一步介绍了表面印迹微球在水相样品前处理中的应用;最后探讨了表面印迹微球在水相样品前处理领域面临的挑战及未来研究趋势。

关键词：表面印迹微球水相识别样品前处理制备策略

Restoration of the JPEg Maximum Lossy Compressed Face Images with Hourglass Block-gAN

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Computers, Materials & Continua 2024年第3期78卷 2893-2908页

In the context of high compression rates applied to Joint Photographic Experts group(JPEg)images through lossy compression techniques,image-blocking artifacts may *** necessitates the restoration of the image to its original *** challenge lies in regenerating significantly compressed images into a state in which these become ***,this study focuses on the restoration of JPEg images subjected to substantial degradation caused by maximum lossy compression using generative Adversarial Networks(gAN).The generator in this network is based on theU-Net *** features a newhourglass structure that preserves the characteristics of the deep *** addition,the network incorporates two loss functions to generate natural and high-quality images:Low Frequency(LF)loss and High Frequency(HF)*** loss uses a pretrained Vgg-16 network and is configured using a specific layer that best represents *** can enhance the performance in the high-frequency *** contrast,LF loss is used to handle the low-frequency *** two loss functions facilitate the generation of images by the generator,which can mislead the discriminator while accurately generating high-and low-frequency ***,by removing the blocking effects frommaximum lossy compressed images,images inwhich identities could be recognized are *** study represents a significant improvement over previous research in terms of the image resolution performance.

关键词： JPEg lossy compression restoration image generation gAN

Yttrium-90 transarterial radioembolization versus conventional transarterial chemoembolization for patients with hepatocellular carcinoma：a systematic review and meta-analysis

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Cancer Biology & Medicine 2018年第3期15卷 299-310页

作者： Yi Yang Tongguo si School of Medical Imaging Tianjin Medical University Tianjin 300203 China Department of Interventional Therapy Tianjin Medical University Cancer Institute and Hospital National Clinical Research Center for CancerKey Laboratory of Cancer Prevention and TherapyTianjin Tianjin's Clinical Research Center for Cancer Tianjin 300060 China

Objective: To compare the effects and safety of conventional transarterial chemoembolization(c TACE) and yttrium-90 transarterial radioembolization [TARE(90 Y)] for hepatocellular carcinoma(HCC)Methods: Nine high-quality observational studies, one low bias-risk randomized controlled trial(RCT), and one moderate biasrisk RCT included 1,652 patients [c TACE, 1,124; TARE(90 Y), 528], from whom data were extracted for this systematic review and ***: The extracted study outcomes included 1-year and 2-year overall survival(OS) rates, objective responses(ORs), and serious adverse events(AEs). 1-year OS rates: OR = 0.939, 95 % CI: 0.705-1.251, P = 0.66. 2-year OS rates: overall pooled OR =0.641, 95% CI: 0.382-1.075, P = 0.092; observational study subgroup OR = 0.575, 95% CI: 0.336-0.984, P = 0.043; RCT subgroup OR* = 0.641, 95% CI: 0.382-1.075, P = 0.346. OR: overall pooled OR = 0.781, 95% CI: 0.454-1.343, P = 0.371; m RECIST subgroup OR = 0.584, 95 % CI: 0.349-0.976, P = 0.040; WHO subgroup OR = 1.065; 95% CI: 0.500-2.268, P = 0.870. Serious AEs: overall pooled RR = 1.477, 95% CI: 0.864-2.526, P = 0.154; RCT subgroup RR = 0.680, 95% CI: 0.325-1.423, P = 0.306; observational study subgroup RR = 1.925; 95 % CI: 0.978-3.788, P = ***: TARE(90 Y) increased 2-year OS rates in the observational subgroup and resulted in better OR rates, according to m RECIST criteria, in comparison with c TACE. Furthermore, a lower risk of AEs was observed for TARE(90 Y) than for c TACE.

关键词： Hepatocellular carcinoma conventional transarterial chemoembolization transarterial radioembolization yttrium-90

Decoupling SERT-nNOS Interaction to generate Fast-Onset Antidepressants

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Neuroscience Bulletin 2023年第8期39卷 1327-1329页

作者： Qing Ye si‑si Lin Henning Ulrich Yong Tang International Joint Research Centre on Purinergic signalling/School of Acupuncture and Tuina Chengdu University of Traditional Chinese MedicineChengdu 610075China Department of Biochemistry Institute of ChemistryUniversity of São PauloSão Paulo 05508Brazil Acupuncture and Chronobiology Key Laboratory of sichuan Province/School of Health and Rehabilitation Chengdu University of Traditional Chinese MedicineChengdu 610075China

Major depressive disorder(MDD)is one of the most common psychiatric disorders,and~4.7%of the world's population has an onset of depression in any one-year *** causes constant distress,impairs social function and physiological health,and even leads to suicide[1].Numerous studies support the classic monoamine hypothesis of depressive *** majority of clinical antidepressants have been developed on the basis of this hypothesis to increase 5-hydroxytryptamine(5-HT).

关键词： distress hypothesis clinical

Microstructures and mechanical properties of DZ125 directional solidified superalloy repaired by HIP technology

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Rare Metals 2023年第12期42卷 4264-4270页

作者： si-Yu Lu Zheng Zhang School of Materials Science and Engineering Beihang UniversityBeijing 100191China

DZ125 directional solidified superalloys show excellent bearing temperature ability and creep resistance and have been widely used to manufacture the advanced aviation engine blades ***,the high temperatures and stresses for longtime service would cause a loss of mechanical properties and service *** this paper,the damaged alloys were repaired using hot isostatic pressing combined with rejuvenation heat treatment technology,where the irregularγ'phases in damaged alloys are recovered to be cubic particles like original state and the creep cavities and casting porosities also reduce obviously compared with those in damaged *** restorable alloys exhibit apparently higher tensile properties and hardness than the alloys in damaged state,which is close or even more than those of original alloy,and their elongation and rupture life can satisfy criterion *** method can be easily extent to repair other damaged superalloys.

关键词： Directional solidified superalloy Hot isostatic pressing Microstructures Mechanical properties