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学者姓名：郑荣业
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Abstract ：
Background: Anatomical variations of the circle of Willis (CoW) are closely associated with the occurrence of intracranial aneurysms (IAs). However, the impact of anatomical variations on the rupture risk of IAs remains unclear. The purpose of this study was to explore the effect of artery absence on the internal flow and rupture risk of IAs. Methods: A one-dimensional (1D) solver was combined with a 3-dimensional (3D) fluid-structure interaction (FSI) model to effectively quantify the hemodynamic characteristics inside IA under artery absence. Results: The 1D results showed that the absence of anterior cerebral artery A1 segment (ACA-A1) or posterior cerebral artery P1 segment (PCA-P1) will trigger a compensatory blood flow effect, leading to significant blood flow variations of the anterior communicating artery (ACoA) and internal carotid artery (ICA). By FSI calculation, in the absence of ACA-A1, the maximum wall shear stress (WSS) within the ACoA aneurysm increased by 103% or more compared to the complete CoW due to blood inflow jet. In addition, WSS increased by 45% and 12% in the contralateral ICA and posterior communicating artery (PCoA) aneurysm respectively, whereas it decreased by 33% and 35% in the ipsilateral ICA and PCoA aneurysm, respectively. The absence of PCA-P1 had a less significant impact on the global blood flow of the CoW compared to the absence of ACA-A1, but it still led to an increase in WSS within the ipsilateral ICA and PCoA aneurysms (25% and 22%, respectively). Conclusions: The absence of ACA-A1 or PCA-P1 may serve as an IA rupture risk factor. If ACA-A1 or PCA-P1 absence is identified clinically alongside an aneurysm, proactive treatment strategies are advised. © AME Publishing Company.
Keyword ：
anatomical variations anatomical variations circle of Willis (CoW) circle of Willis (CoW) fluid-structure interaction (FSI) fluid-structure interaction (FSI) Intracranial aneurysm (IA) Intracranial aneurysm (IA)
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| GB/T 7714 | Zheng, R. , Zhang, S. , Zhu, C. et al. Impact of anatomical variations of the circle of Willis on the blood flow within unruptured intracranial aneurysm [J]. | Quantitative Imaging in Medicine and Surgery , 2025 , 15 (8) : 6667-6681 . |
| MLA | Zheng, R. et al. "Impact of anatomical variations of the circle of Willis on the blood flow within unruptured intracranial aneurysm" . | Quantitative Imaging in Medicine and Surgery 15 . 8 (2025) : 6667-6681 . |
| APA | Zheng, R. , Zhang, S. , Zhu, C. , Zhang, C. , Hong, W. . Impact of anatomical variations of the circle of Willis on the blood flow within unruptured intracranial aneurysm . | Quantitative Imaging in Medicine and Surgery , 2025 , 15 (8) , 6667-6681 . |
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Individual Pitch Control (IPC) is a crucial mechanism for mitigating asymmetric loads in offshore floating wind turbines (OFWTs). Conventional IPC systems face significant limitations in wind speed estimation accuracy and control strategy robustness, leading to load fluctuations and power degradation. To address these challenges, this study proposes a novel IPC system incorporating an innovative effective wind speed estimation method and a fuzzy PID control strategy. The wind speed estimation is achieved using polynomial fitting of the tip speed ratio and pitch angle. The fuzzy PID control strategy for IPC employs variable control gains calculated based on wind speed, azimuth angle, and blade root loads. To verify the performance of the proposed control system, it is compared against the baseline control system implemented in the OpenFAST software v1.0.0 by a case study of the NREL 5MW OFWT. Results demonstrate that the proposed system has high accuracy in wind speed estimation and maintains rated power output while reducing blade flapwise and pitching moments. Notably, the proposed EWSE has a 53.1% improvement in median error and a 19.23% improvement in data error threshold compared with a reference EWSE. Under strong turbulent conditions (15% turbulence intensity), the proposed system achieves a reduction of 17.9% in flapwise moment and 12.9% in pitching moment compared with a baseline controller.
Keyword ：
effective wind speed estimation effective wind speed estimation fuzzy PID control strategy fuzzy PID control strategy individual pitch control individual pitch control offshore floating wind turbine offshore floating wind turbine OpenFAST simulation OpenFAST simulation
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| GB/T 7714 | Lin, Jiahuan , Yuan, Weijia , Hu, Zhipeng et al. Fuzzy PID Individual Pitch Control with Effective Wind Speed Estimation for Offshore Floating Wind Turbines [J]. | ENERGIES , 2025 , 18 (18) . |
| MLA | Lin, Jiahuan et al. "Fuzzy PID Individual Pitch Control with Effective Wind Speed Estimation for Offshore Floating Wind Turbines" . | ENERGIES 18 . 18 (2025) . |
| APA | Lin, Jiahuan , Yuan, Weijia , Hu, Zhipeng , Huang, Zijun , Yan, Zining , Huang, Hengju et al. Fuzzy PID Individual Pitch Control with Effective Wind Speed Estimation for Offshore Floating Wind Turbines . | ENERGIES , 2025 , 18 (18) . |
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OBJECTIVE: Multiple intracranial aneurysms (MIA) are prevalent. This study conducted hemodynamic calculations on MIA to analyze the effects of occlusion of the internal carotid artery (ICA) and middle cerebral artery (MCA) aneurysms on the hemodynamics of other arteries, as well as the issue of the treatment order for these aneurysms. METHODS: The models of 9 patients with MIA were selected for the study. A computational fluid dynamics model combining 1-dimension and 3-dimension was used to obtain the vascular flow pattern and wall pressure. RESULTS: There was increased pressure at the MCA and anterior cerebral artery (ACA) after occlusion of the aneurysm at the ICA. However, the pressure at the ICA has hardly changed after the aneurysm occlusion at the MCA. Occlusion of the aneurysm of different sizes at the MCA had almost no impact on the pressure at the ICA and ACA. For small aneurysm, the pressure of the ACA and MCA increases with decreasing size of the aneurysm at the ICA. After occlusion of a large aneurysm at the ICA, the impact on the pressure of the ACA and MCA is almost the same as after occlusion of a medium-sized aneurysm. CONCLUSIONS: If the treatment order of ICA and MCA aneurysms cannot be determined based on patient factors and aneurysm characteristics, the MCA aneurysm should be treated as a priority.
Keyword ：
Computational fluid dynamics Computational fluid dynamics Intracranial Intracranial Multiple intracranial aneurysms Multiple intracranial aneurysms Occlusion Occlusion
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| GB/T 7714 | Yi, Xu , Zhang, Shuhua , Han, Qicheng et al. Quantitative Evaluation of Hemodynamic Changes After Multiple Intracranial Aneurysms Occlusion Using Computational Fluid Dynamics [J]. | WORLD NEUROSURGERY , 2024 , 181 : e918-e924 . |
| MLA | Yi, Xu et al. "Quantitative Evaluation of Hemodynamic Changes After Multiple Intracranial Aneurysms Occlusion Using Computational Fluid Dynamics" . | WORLD NEUROSURGERY 181 (2024) : e918-e924 . |
| APA | Yi, Xu , Zhang, Shuhua , Han, Qicheng , Hong, Wenyao , He, Bingwei , Liu, Yuqing et al. Quantitative Evaluation of Hemodynamic Changes After Multiple Intracranial Aneurysms Occlusion Using Computational Fluid Dynamics . | WORLD NEUROSURGERY , 2024 , 181 , e918-e924 . |
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To reduce the levelized cost of energy (LCOE) for offshore wind turbines, a novel wind-wave energy converter (WWEC) with a mass-adjustable buoy is designed. To analyze the impact of buoy mass variations on the system, a coupled comprehensive numerical model is established to simulate the aerodynamics of the turbine and the hydrodynamics of the platform and buoy. It is found that the occurrence of the buoy out of water significantly reduces the output power. Adjusting the buoy's mass with suitable strategy can prevent the impact of slamming loads and improve the power output. The mass adjustment strategy is determined based on the output power of the wave energy converter under regular wave conditions. It is found that the mass adjustment strategy can significantly enhance the output power of combined system. The buoy does not move out of the water under the extreme conditions, which avoids the impact of slamming loads on system stability. Moreover, mass-adjustable buoys can reduce the risk of mooring line failure compare to a wind turbine without a buoy.
Keyword ：
conceptual design conceptual design mass-adjustable buoy mass-adjustable buoy power optimization power optimization wind-wave energy converter wind-wave energy converter
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| GB/T 7714 | Shi, Yifeng , Lin, Jiahuan , Zhuge, Zexin et al. Conceptual Design and Dynamic Analysis of a Wind-Wave Energy Converter with a Mass-Adjustable Buoy [J]. | JOURNAL OF MARINE SCIENCE AND ENGINEERING , 2024 , 12 (8) . |
| MLA | Shi, Yifeng et al. "Conceptual Design and Dynamic Analysis of a Wind-Wave Energy Converter with a Mass-Adjustable Buoy" . | JOURNAL OF MARINE SCIENCE AND ENGINEERING 12 . 8 (2024) . |
| APA | Shi, Yifeng , Lin, Jiahuan , Zhuge, Zexin , Zheng, Rongye , Zhang, Jun . Conceptual Design and Dynamic Analysis of a Wind-Wave Energy Converter with a Mass-Adjustable Buoy . | JOURNAL OF MARINE SCIENCE AND ENGINEERING , 2024 , 12 (8) . |
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Clinically, circle of Willis (CoW) is prone to anomaly and is also the predominant incidence site of intracranial aneurysms (IAs). This study aims to investigate the hemodynamic characteristics of CoW anomaly, and ascertain the mechanism of IAs initiation from the perspective of hemodynamics. Thus, the flow of IAs and pre-IAs were analyzed for one type of cerebral artery anomaly, that is, anterior cerebral artery A1 segment (ACA-A1) unilateral absence. Three patient geometrical models with IAs were selected from Emory University Open Source Data Center. IAs were virtually removed from the geometrical models to simulate the pre-IAs geometry. For calculation methods, a one-dimensional (1-D) solver and a three-dimensional (3-D) solver were combined to obtain the hemodynamic characteristics. The numerical simulation revealed that the average flow of Anterior Communicating Artery (ACoA) is almost zero when CoW is complete. In contrast, ACoA flow increases significantly in the case of ACA-A1 unilateral absence. For per-IAs geometry, the jet flow is found at the bifurcation between contralateral ACA-A1 and ACoA, which exhibits characteristics of high Wall Shear Stress (WSS) and high wall pressure in the impact region. It triggers the initiation of IAs from the perspective of hemodynamics. The vascular anomaly that leads to jet flow should be considered as a risk factor for IAs initiation.
Keyword ：
circle of Willis anomaly circle of Willis anomaly computational fluid dynamics computational fluid dynamics Intracranial aneurysm Intracranial aneurysm jet flow jet flow
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| GB/T 7714 | Rongye Zheng , Qicheng Han , Wenyao Hong et al. Hemodynamic characteristics and mechanism for intracranial aneurysms initiation with the circle of Willis anomaly [J]. | Computer Methods in Biomechanics and Biomedical Engineering , 2024 , 27 (6) : 727-735 . |
| MLA | Rongye Zheng et al. "Hemodynamic characteristics and mechanism for intracranial aneurysms initiation with the circle of Willis anomaly" . | Computer Methods in Biomechanics and Biomedical Engineering 27 . 6 (2024) : 727-735 . |
| APA | Rongye Zheng , Qicheng Han , Wenyao Hong , Xu Yi , Bingwei He , Yuqing Liu . Hemodynamic characteristics and mechanism for intracranial aneurysms initiation with the circle of Willis anomaly . | Computer Methods in Biomechanics and Biomedical Engineering , 2024 , 27 (6) , 727-735 . |
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Abstract ：
Clinically, circle of Willis (CoW) is prone to anomaly and is also the predominant incidence site of intracranial aneurysms (IAs). This study aims to investigate the hemodynamic characteristics of CoW anomaly, and ascertain the mechanism of IAs initiation from the perspective of hemodynamics. Thus, the flow of IAs and pre-IAs were analyzed for one type of cerebral artery anomaly, that is, anterior cerebral artery A1 segment (ACA-A1) unilateral absence. Three patient geometrical models with IAs were selected from Emory University Open Source Data Center. IAs were virtually removed from the geometrical models to simulate the pre-IAs geometry. For calculation methods, a one-dimensional (1-D) solver and a three-dimensional (3-D) solver were combined to obtain the hemodynamic characteristics. The numerical simulation revealed that the average flow of Anterior Communicating Artery (ACoA) is almost zero when CoW is complete. In contrast, ACoA flow increases significantly in the case of ACA-A1 unilateral absence. For per-IAs geometry, the jet flow is found at the bifurcation between contralateral ACA-A1 and ACoA, which exhibits characteristics of high Wall Shear Stress (WSS) and high wall pressure in the impact region. It triggers the initiation of IAs from the perspective of hemodynamics. The vascular anomaly that leads to jet flow should be considered as a risk factor for IAs initiation.
Keyword ：
circle of Willis anomaly circle of Willis anomaly computational fluid dynamics computational fluid dynamics Intracranial aneurysm Intracranial aneurysm jet flow jet flow
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| GB/T 7714 | Zheng, Rongye , Han, Qicheng , Hong, Wenyao et al. Hemodynamic characteristics and mechanism for intracranial aneurysms initiation with the circle of Willis anomaly [J]. | COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING , 2023 , 27 (6) : 727-735 . |
| MLA | Zheng, Rongye et al. "Hemodynamic characteristics and mechanism for intracranial aneurysms initiation with the circle of Willis anomaly" . | COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING 27 . 6 (2023) : 727-735 . |
| APA | Zheng, Rongye , Han, Qicheng , Hong, Wenyao , Yi, Xu , He, Bingwei , Liu, Yuqing . Hemodynamic characteristics and mechanism for intracranial aneurysms initiation with the circle of Willis anomaly . | COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING , 2023 , 27 (6) , 727-735 . |
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一种带散热叶片的铁观音茶叶揉捻机，包括工作台，所述工作台上设置有揉捻桶，所述揉捻桶内设置有搅拌散热装置，所述揉捻桶上方设置有压缩装置。本实新结构紧凑，使用方便，利用压缩揉捻和打散散热交替进行的方式，解决当前铁观音茶叶包揉过程的机械化程度低，人工参与较多的缺陷；采用搅拌散热装置在茶叶内部进行散热，加快散热和固定茶叶的品质。
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| GB/T 7714 | 郑荣业 , 韩骐丞 , 陈爱华 . 一种带散热叶片的铁观音茶叶揉捻机 : CN202120300061.5[P]. | 2021-02-03 . |
| MLA | 郑荣业 et al. "一种带散热叶片的铁观音茶叶揉捻机" : CN202120300061.5. | 2021-02-03 . |
| APA | 郑荣业 , 韩骐丞 , 陈爱华 . 一种带散热叶片的铁观音茶叶揉捻机 : CN202120300061.5. | 2021-02-03 . |
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教学方法改革是提高教学质量的重要途径。本文针对《机械设计基础》的课程特点以及教学过程中的一些问题,分析了适用于该课程的多种教学方法,研究了纲要框图法在课程教学中的应用和实践,提高了课堂教学质量,取得了较好的教学效果。
Keyword ：
教学方法 教学方法 机械设计基础 机械设计基础 纲要框图法 纲要框图法
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| GB/T 7714 | 陈爱华 , 黄健萌 , 郑荣业 . 《机械设计基础》课程教学方法的研究与实践 [J]. | 科教导刊:电子版 , 2020 , (31) : 156-157 . |
| MLA | 陈爱华 et al. "《机械设计基础》课程教学方法的研究与实践" . | 科教导刊:电子版 31 (2020) : 156-157 . |
| APA | 陈爱华 , 黄健萌 , 郑荣业 . 《机械设计基础》课程教学方法的研究与实践 . | 科教导刊:电子版 , 2020 , (31) , 156-157 . |
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血液在高转速下可能出现溶血的现象,利用章动原理设计了一款新型的心室辅助泵,有效地降低了设计转速.首先对微型章动心室辅助泵进行三维建模,之后对泵体内部流场开展实时仿真,获得心室辅助泵内部的流动特性,最后对微型章动心室辅助泵进行实物加工,开展水介质的性能实验,验证了微型心室辅助泵的可行性.
Keyword ：
微型心室辅助泵 微型心室辅助泵 数值分析 数值分析 章动运动 章动运动
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| GB/T 7714 | 郑荣业 , 张隆 , 姚立纲 et al. 微型章动心室辅助泵的流体动力学仿真与实验 [J]. | 机械制造与自动化 , 2019 , 48 (6) : 82-85 . |
| MLA | 郑荣业 et al. "微型章动心室辅助泵的流体动力学仿真与实验" . | 机械制造与自动化 48 . 6 (2019) : 82-85 . |
| APA | 郑荣业 , 张隆 , 姚立纲 , 陈刚 . 微型章动心室辅助泵的流体动力学仿真与实验 . | 机械制造与自动化 , 2019 , 48 (6) , 82-85 . |
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Considering the wear in mechanical bearings and the requirement for sensors or electrical power in active magnetic bearings, a novel nutation blood pump using a passive magnetic spherical bearing was developed in this paper. A mathematical model was derived to calculate the magnetic forces of the bearing between two pairs of magnetic sleeves in the nutation process. The calculation results demonstrate that the fluctuations of magnetic forces enlarge with the increase in the nutation angle; the magnetic forces obviously increase with the decrease in the air gap, especially along the z-axis. The dynamic magnetic finite element simulation was carried out to validate the mathematical model. The simulation and calculation results of the magnetic forces show consistent trends and provide a theoretical basis for the parameter design. To validate the performance of the pump, computational fluid dynamics (CFD) analyses and in vitro experiments were conducted. The predicted values of the flow velocity vector through the pump, and the wall shear stress, demonstrate that the pump has an antithrombotic property and would not cause serious blood damage. The hydraulic experiment shows that a pressure rise can be achieved in the range of 60140 mmHg, at a rotational speed of 6001600 rpm and a flow rate of 0.46.7 L/min. The normalized index of hemolysis (NIH) of the nutation pump was 0.0043 0.0008 g/100L. The in vitro tests indicate the feasibility of a magnetically levitated ventricular-assist nutation blood pump for further suspension stability and animal trials.
Keyword ：
bearing capacity bearing capacity Blood Blood Heart Heart Magnetic confinement Magnetic confinement Magnetic forces Magnetic forces Magnetic levitation Magnetic levitation numerical simulation numerical simulation Nutation blood pump Nutation blood pump passive magnetic levitation passive magnetic levitation Permanent magnets Permanent magnets Pumps Pumps ventricular assist device ventricular assist device
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| GB/T 7714 | Chen, Gang , Yao, Ligang , Zheng, Rongye et al. Design and Implementation of a Novel Passive Magnetically Levitated Nutation Blood Pump for the Ventricular-Assist Device [J]. | IEEE ACCESS , 2019 , 7 : 169327-169337 . |
| MLA | Chen, Gang et al. "Design and Implementation of a Novel Passive Magnetically Levitated Nutation Blood Pump for the Ventricular-Assist Device" . | IEEE ACCESS 7 (2019) : 169327-169337 . |
| APA | Chen, Gang , Yao, Ligang , Zheng, Rongye , Zhang, Long , Ding, Jiaxin . Design and Implementation of a Novel Passive Magnetically Levitated Nutation Blood Pump for the Ventricular-Assist Device . | IEEE ACCESS , 2019 , 7 , 169327-169337 . |
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