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Heat transfer prediction modeling method combining threedimensional high-precision and one-dimensional real-time dynamic simulations

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Science China Technological Sciences 2025年第3期68卷 86-100页

作者： xuanang ZHANG ping YUAN Gequn SHU xuan wANG Hua TIAN State Key Laboratory of Engines Tianjin University Department of Thermal Science and Energy Engineering University of Science and Technology of China

Heat exchangers are the core components of energy transfer and conversion and are widely used in the energy,chemical, and other fields. In an actual operational process, load changes lead to variations in the operating conditions of the heat exchanger. Evaluating the heat-transfer performance is crucial for the safe and efficient operation of the system. To realize high-precision heat transfer prediction through simulations, instead of using traditional solid equipment, this study proposed a heat transfer prediction modeling method that combines three-dimensional high-precision and one-dimensional real-time dynamic simulations. This method combines the high-precision advantage of three-dimensional simulation with the real-time advantage of one-dimensional simulation. To verify the feasibility of the modeling method, a heat transfer prediction model was constructed based on the heat transfer channel structure of a CO2mixture heat transfer characteristic experimental test *** steady-state and dynamic heat transfer characteristics of CO2/R32 mixtures were simulated and experimentally ***, the real-time operational capability of the heat transfer prediction model was verified using a real-time simulator. The results showed that the heat transfer prediction model modeling method proposed in this study could improve the accuracy by 1.75–4.64 times compared with the conventional one-dimensional dynamic model. The established heat transfer prediction model exhibited good accuracy for both dynamic and steady-state processes. The average relative errors with the experimental results were in the range of 0.91%–2.83% under six sets of experimental tests. Thus, the proposed heat transfer prediction model can predict the heat transfer process in real-time under all experimental heat source conditions.

关键词： heat transfer prediction model CO2 mixture heat exchanger real-time simulation

Investigating the p-Ω interactions and correlation functions

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Science China(Physics,Mechanics & Astronomy) 2025年

作者： Ye Yan Qi Huang Youchang Yang Hongxia Huang Jialun ping Department of Physics Nanjing Normal University School of Science Guizhou University of Engineering Science

Motivated by experimental measurements, we investigate the p-Ω correlation functions and interactions on the basis of a quark model. By solving the inverse scattering problem with channel coupling, we renormalize the coupling to other channels into an effective single-channel p-Ω potentials. The effects of Coulomb interaction and spin-averaging are also discussed. According to our results, the depletion of the p-Ω correlation functions, which is attributed to the JP= 2+bound state not observed in the ALICE Collaboration's measurements(Nature 588, 232（2020）), can be explained by the contribution of the attractive JP= 1+component in spin-averaging. So far, we have provided a consistent description of the p-Ω system from the perspective of the quark model, including the energy spectrum, scattering phase shifts, and correlation functions. The existence of the p-Ω bound state has been supported by all three aspects. Additionally, a sign of the p-Ω correlation function's subtle sub-unity part can be seen in experimental measurements, which warrants more precise verification in the future.

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A promising approach for quantifying focal stroke modeling and assessing stroke progression:optical resolution photoacoustic microscopy photothrombosis

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Neural Regeneration Research 2025年第7期20卷 2029-2037页

作者： Xiao Liang Xingping Quan Xiaorui Geng Yujing Huang Yonghua Zhao Lei Xi Zhen Yuan ping wang Bin Liu Faculty of Health Sciences University of MacaoMacao Special Administrative RegionChina Center for Cognitive and Brain Sciences University of MacaoMacao Special Administrative RegionChina Department of Biomedical Engineering Southern University of Science and TechnologyShenzhenGuangdong ProvinceChina State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical SciencesUniversity of MacaoTaipaMacao Special Administrative RegionChina Department of Emergency Zhujiang HospitalSouthern Medical UniversityGuangzhouGuangdong ProvinceChina

To investigate the mechanisms underlying the onset and progression of ischemic stroke,some methods have been proposed that can simultaneously monitor and create embolisms in the animal cerebral ***,these methods often require complex systems and the effect of age on cerebral embolism has not been adequately studied,although ischemic stroke is strongly *** this study,we propose an optical-resolution photoacoustic microscopy-based visualized photothrombosis methodology to create and monitor ischemic stroke in mice simultaneously using a 532 nm pulsed *** observed the molding process in mice of different ages and presented age-dependent vascular embolism ***,we integrated optical coherence tomography angiography to investigate age-associated trends in cerebrovascular variability following a *** imaging data and quantitative analyses underscore the differential cerebrovascular responses to stroke in mice of different ages,thereby highlighting the technique's potential for evaluating cerebrovascular health and unraveling age-related mechanisms involved in ischemic strokes.

关键词： age-dependent cerebral cortex ischemic stroke mouse model optical coherence tomography angiography photoacoustic microscopy photothrombosis vascular imaging

A Machine Learning-Based Observational Constraint Correction Method for Seasonal Precipitation Prediction

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Advances in Atmospheric Sciences 2025年第1期42卷 36-52页

作者： Bofei ZHANG Haipeng YU Zeyong HU ping YUE Zunye TANG Hongyu LUO Guantian wANG Shanling CHENG Key Laboratory of Cryospheric Science and Frozen Soil Engineering Nagqu Plateau Climate and Environment Observation and Research Station of Tibet Autonomous RegionNorthwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China University of the Chinese Academy of Sciences Beijing 100049China Key Open Laboratory of Arid Climate Change and Disaster Reduction of CMA Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu ProvinceInstitute of Arid MeteorologyChina Meteorological AdministrationLanzhou 730000China School of Computer Science and Technology Faculty of Electronic and Information EngineeringXi’an Jiaotong UniversityXi’an 710049China

Seasonal precipitation has always been a key focus of climate *** a dynamic-statistical combined method,the existing observational constraint correction establishes a regression relationship between the numerical model outputs and historical observations,which can partly predict seasonal ***,solving a nonlinear problem through linear regression is significantly *** study implements a nonlinear optimization of an existing observational constrained correction model using a Light Gradient Boosting Machine(LightGBM)machine learning algorithm based on output from the Beijing National Climate Center Climate System Model(BCC-CSM)and station observations to improve the prediction of summer precipitation in *** model was trained using a rolling approach,and LightGBM outperformed Linear Regression(LR),Extreme Gradient Boosting(XGBoost),and Categorical Boosting(CatBoost).Using parameter tuning to optimize the machine learning model and predict future summer precipitation using eight different predictors in BCC-CSM,the mean Anomaly Correlation Coefficient(ACC)score in the 2019–22 summer precipitation predictions was 0.17,and the mean Prediction Score(PS)reached *** PS score was improved by 7.87%and 6.63%compared with the BCC-CSM and the linear observational constraint approach,*** observational constraint correction prediction strategy with LightGBM significantly and stably improved the prediction of summer precipitation in China compared to the previous linear observational constraint solution,providing a reference for flood control and drought relief during the flood season(summer)in China.

关键词： observational constraint LightGBM seasonal prediction summer precipitation machine learning

Endoscopic ultrasound-guided liver biopsy in liver transplant recipients: A preliminary experience

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Hepatobiliary & Pancreatic Diseases International 2025年第1期24卷 108-110页

作者： wei Rao Yue-ping Jiang Jin-Zhen Cai Man Xie Division of Hepatology Liver Disease Center the Affiliated Hospital of Qingdao University Department of Organ Transplantation the Affiliated Hospital of Qingdao University Department of Gastroenterology the Affiliated Hospital of Qingdao University

To the Editor:withthepopularityoflivertransplantation(LT)andtheinspirationforlong-timesurvival,issuesrelatedtoevaluatingthe liver allograft have increased in recent years [1–3]. Although there hasbeenrenewedinterestinnon-invasivemethodstoevaluate diffuseliverdisease,liverbiopsyisstillthegoldenstandardin clinical practice, particularly for liver transplant recipients (LTRs).TheliverbiopsyhasalwaysbeenperformedinLTRsasapart ofstandardprocedureincaseswhoseliverfunctionwasnormal, named as protocol liver biopsy, or to identify histological abnormalities for abnormal liver function and provide guidance for the adjustment of immunosuppressive regimen [4, 5]. Percutaneous liver biopsy (PLB) has been frequently conducted in LTRs; however,the clinical implementation of protocol liver biopsy by PLB in LTRs is challenging due to their suboptimal compliance, particularly in China [6]. Besides, the PLB procedure has been associated with discomfort and potentially life-threatening complications in the generalpopulation,asreportedintheliterature[7, 8].Recently,endoscopic ultrasound-guided liver biopsy (EUS-LB) has been widely carried out in clinical practice, with comparable safety profile, satisfactory tissue acquisition, and technical success [9–12]. To date,EUS-LB in LTRs has not been studied sufficiently, thus, our preliminary experience of EUS-LB among LTRs is presented in this study.

关键词： biopsy preliminary comfort

Study on the diagnostic criteria of syndrome of dampness obstruction in idiopathic membranous nephropathy based on expert consensus

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Journal of Traditional Chinese Medicine 2025年第1期45卷 167-175页

作者： wANG Dan HUANG Xiaoyan LI ping HONG Xiaofan ZHANG Yumin wANG Rongrong BAO Kun LIANG Xing Nephrology Department Qianxinan Autonomous Prefecture Hospital of Traditional Chinese Medicine Nephrology Department Guangdong Provincial Hospital of Chinese Medicine Guangdong Provincial Key Laboratory of Chinese Medicine for Prevention and Treatment of Refractory Chronic Disease the Second Affiliated Hospital of Guangzhou University of Chinese Medicine State Key Laboratory of Dampness Syndrome of Chinese Medicine the Second Affiliated Hospital of Guangzhou University of Chinese Medicine State Key Laboratory of Dampness Syndrome of Chinese Medicine The Second Affiliated Hospital of Guangzhou University of Chinese Medicine Guangdong-Hong Kong-Macau Joint Lab on Chinese Medicine and Immune Disease Research

OBJECTIVE: To reach consensus on the diagnostic criteria of syndrome of dampness obstruction in idiopathic membranous nephropathy(IMN) patients by literature research and expert investigation(interviews and a Delphi method). METHODS: Our study was consistent with T/CACM 1336-2020. we searched the monographs and references published in the past 40 years(1983-2022), and established the diagnostic criteria pool of waterdampness syndrome and dampness-turbidity syndrome in Traditional Chinese Medicine(TCM) based on literature by using frequency statistics and correlation analysis. Expert investigation(interview method and two rounds of Delphi method) was used to form the diagnostic criteria of water-dampness syndrome and dampnessturbidity syndrome of idiopathic membranous nephropathy. Clinical diagnostic test research was carried out, and compared with “Diagnostic Criteria for dampness syndrome”(T/CACM 1454-2023) to evaluate the authenticity, reliability and clinical application value of the standard. RESULTS: A total of 122 relevant guides, standards, monographs and documents were included through searching books and Chinese databases. Four experts were interviewed and two rounds of delphi method(75 experts nationwide) were carried out. The experts' opinions are relatively concentrated and the differences are small. Based on the weight of each index, the diagnostic criteria indexes of water-dampness syndrome and dampness-turbidity syndrome were selected. After discussion by the core group members, the diagnostic model of "necessary symptoms and optional symptoms" was established, and the final diagnostic criteria of waterdampness syndrome and dampness-turbidity syndrome were established. One hundred and ninety-one inpatients and outpatients of Guangdong Provincial Hospital of Chinese Medicine from January 2021 to February 2023 were included in Diagnostic test study. There was no statistical difference in gender, age and course of disease(P > 0.05). The sensitivity and s

关键词： combination of disease and syndrome diagnostic tests, routine glomerulonephritis, membranous syndrome diagnostic criteria syndrome of dampness obstruction

From surgery to recovery:Measuring success through quality of life and functional improvements after cardiac surgery

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world Journal of Cardiology 2025年第2期17卷 1-8页

作者： Peng Li Hui-ping Zhang Department of Geriatric Beijing HospitalNational Center of GerontologyInstitute of Geriatric MedicineChinese Academy of Medical SciencesBeijing 100730China Department of Cardiology Beijing HospitalNational Center of GerontologyInstitute of Geriatric MedicineChinese Academy of Medical SciencesBeijing 100730China

Coronary artery disease and aortic valve stenosis are highly prevalent cardio-vascular diseases worldwide,resulting in substantial morbidity and *** interventions,such as coronary artery bypass grafting and surgical aortic valve replacement,offer significant therapeutic benefits,including enhanced postoperative quality of life(QoL)and functional capacity,which are key indi-cators of surgical *** editorial reviews recent studies on postoperative QoL and functional outcomes in patients undergoing cardiac *** such as preoperative health,age,intensive care unit stay duration,surgical risk,and perioperative complications could influence these *** rehabil-itation is pivotal in enhancing patient function,reducing frailty and improving long-term QoL.

关键词： Quality of Life Functional capacity Cardiac surgery Coronary artery bypass grafting Surgical aortic valve replacement Cardiac rehabilitation

强度空间非均质性与各向异性特征下边坡稳定性极限平衡滑面应力法

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岩土力学 2025年第1期46卷 55-72页

作者：邓东平徐润冬彭一航文莎莎中南大学土木工程学院湖南长沙400075

实际工程中,土体强度存在空间非均质性与各向异性特征,忽视这些特性将难以可靠地评估边坡稳定性。为此,对强度空间非均质性与各向异性特征下边坡稳定性开展深入研究。首先,改进现有空间非均质性模型和原始Casagrande各向异性模型,拓展... 详细信息

实际工程中,土体强度存在空间非均质性与各向异性特征,忽视这些特性将难以可靠地评估边坡稳定性。为此,对强度空间非均质性与各向异性特征下边坡稳定性开展深入研究。首先,改进现有空间非均质性模型和原始Casagrande各向异性模型,拓展其通用性与实用性。其次,对土体强度空间非均质性与各向异性进行耦合,并将其嵌入至拉剪改进模式下Mohr-Coulomb(简称M-C)强度准则当中。然后,在极限平衡理论的框架内,采用滑面应力计算模式代替传统条间力假设模式,并通过构建滑面应力函数以及引入滑面局部安全系数概念和滑面端部应力约束条件,实现边坡拉-剪与压-剪共同作用机制和边坡渐进破坏方式的融入。最后,基于滑体所满足的整体力学平衡条件,建立强度空间非均质性与各向异性特征下边坡稳定性极限平衡严格解答。经后续算例对比分析,提出的方法的可行性与有效性得以验证。此外,研究成果将可用于全面揭示强度空间非均质性与各向异性特征下边坡破坏机制。

关键词：边坡稳定性非均质各向异性极限平衡滑面应力渐进破坏模式

Multi-frequency formation mechanism and modulation strategy of self-priming enhanced submerged pulsed waterjet

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International Journal of Mining Science and Technology 2025年第2期35卷 175-189页

作者： Liu, Yanwei Jia, Haojie Zuo, weiqin Han, Hongkai Chang, ping Ali Asad, Mohammad waqar Hu, Guozhong Miao, Jian Mitri, Hani S. College of Safety Science and Engineering Henan Polytechnic University Jiaozuo454003 China Henan International Joint Laboratory of Coal Mine Safety and Occupational Hazards Prevention and Control JiaoZuo454003 China Zhengzhou Institute for Advanced Research of Henan Polytechnic University Zhengzhou451464 China wA School of Mines: Minerals Energy and Chemical Engineering Curtin University KalgoorlieWA6430 Australia School of Mines China University of Mining and Technology Xuzhou221116 China School of Intelligent Engineering Shandong Management University Jinan250357 China Department of Mining and Materials Engineering McGill University MontrealH3A0E8 Canada

Under submerged conditions, compared with traditional self-excited oscillating pulsed waterjets (SOPws), annular fluid-enhanced self-excited oscillating pulsed waterjets (AFESOPws) exhibit a higher surge pressure through self-priming. However, their pressure frequency and cavitation characteristics remain unclear, resulting in an inability to fully utilize resonance and cavitation erosion to break coal and rock. In this study, high-frequency pressure testing, high-speed photography, and large eddy simulation (LES) are used to investigate the distribution of the pressure frequency band, evolution law of the cavitation cloud, and its regulation mechanism of a continuous waterjet, SOPw, and AFESOPw. The results indicated that the excitation of the plunger pump, shearing layer vortex, and bubble collapse corresponded to the three high-amplitude frequency bands of the waterjet pressure. AFESOPws have an additional self-priming frequency that can produce a larger amplitude under a synergistic effect with the second high-amplitude frequency band. A better cavitation effect was produced after self-priming the annulus fluid, and the shedding frequency of the cavitation clouds of the three types of waterjets was linearly related to the cavitation number. The peak pressure of the waterjet and cavitation erosion effect can be improved by modulating the waterjet pressure oscillation frequency and cavitation shedding frequency. © 2025

关键词： Cavitation