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学者姓名：郑荣业
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Abstract ：
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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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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Abstract ：
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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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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The effect of sample tilt in spherical indentation is studied by recourse to three-dimensional finite element simulation of the loading process. An elastic solid subjected to a rigid spherical indenter is considered under either frictionless or infinitely frictional contact condition. It is found the contact boundary is not parallel with the tilted surface, and the tilt angle of the contact boundary is smaller than the sample tilt angle. The side force is prominent for frictionless contact, and the ratio of side force to normal force increases with the sample tilt angle because of a larger unbalanced displacement field. Nevertheless, the ratio of side force to normal force is relatively small for infinitely frictional contact because the displacement distribution is controlled by the nonslip condition and almost balanced irrespective of sample tilt.
Keyword ：
correction factors correction factors elastic contact deformation elastic contact deformation finite element analysis finite element analysis spherical indentation spherical indentation tilted sample tilted sample
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| GB/T 7714 | Gao, Chenghui , Yao, Ligang , Zheng, Rongye et al. Effect of Sample Tilt on Spherical Indentation of an Elastic Solid [J]. | JOURNAL OF TESTING AND EVALUATION , 2019 , 47 (4) : 2596-2612 . |
| MLA | Gao, Chenghui et al. "Effect of Sample Tilt on Spherical Indentation of an Elastic Solid" . | JOURNAL OF TESTING AND EVALUATION 47 . 4 (2019) : 2596-2612 . |
| APA | Gao, Chenghui , Yao, Ligang , Zheng, Rongye , Liu, Ming . Effect of Sample Tilt on Spherical Indentation of an Elastic Solid . | JOURNAL OF TESTING AND EVALUATION , 2019 , 47 (4) , 2596-2612 . |
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Abstract ：
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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本实用新型涉及一种磁悬浮章动球轴承，磁悬浮章动球轴承包括轴承盖和位于轴承盖内的章动球，所述轴承盖包括轴承上盖、轴承下盖，轴承上盖和轴承下盖内均设置多个凹槽，凹槽内设永磁体二；章动球包括章动球体，章动球体固连多个章动输入轴，章动球体上设置多个凹槽，章动球体的凹槽内设永磁体一；轴承上盖和轴承下盖上的凹槽个数一致且位置相对，章动球体上的凹槽与轴承盖内的凹槽位置相对；永磁体一和永磁体二均径向充磁，永磁体一和永磁体二的相对面磁性相同。本实用新型球轴承采用永磁悬浮，具有无摩擦、无需润滑、噪音小、发热少及能效比高等优点，可实现章动传动，彻底解决了机械磨损的问题，极大程度上提高了球轴承的性能和寿命。
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| GB/T 7714 | 姚立纲 , 陈刚 , 郑荣业 et al. 磁悬浮章动球轴承 : CN201820444880.5[P]. | 2018/3/30 . |
| MLA | 姚立纲 et al. "磁悬浮章动球轴承" : CN201820444880.5. | 2018/3/30 . |
| APA | 姚立纲 , 陈刚 , 郑荣业 , 张隆 . 磁悬浮章动球轴承 : CN201820444880.5. | 2018/3/30 . |
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本发明涉及一种磁悬浮章动球轴承及其工作方法，磁悬浮章动球轴承包括轴承盖和位于轴承盖内的章动球，所述轴承盖包括轴承上盖、轴承下盖，轴承上盖和轴承下盖内均设置多个凹槽，凹槽内设永磁体二；章动球包括章动球体，章动球体固连多个章动输入轴，章动球体上设置多个凹槽，章动球体的凹槽内设永磁体一；轴承上盖和轴承下盖上的凹槽个数一致且位置相对，章动球体上的凹槽与轴承盖内的凹槽位置相对；永磁体一和永磁体二均径向充磁，永磁体一和永磁体二的相对面磁性相同。本发明球轴承采用永磁悬浮，具有无摩擦、无需润滑、噪音小、发热少及能效比高等优点，可实现章动传动，彻底解决了机械磨损的问题，极大程度上提高了球轴承的性能和寿命。
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| GB/T 7714 | 姚立纲 , 陈刚 , 郑荣业 et al. 磁悬浮章动球轴承及其工作方法 : CN201810276869.7[P]. | 2018/3/30 . |
| MLA | 姚立纲 et al. "磁悬浮章动球轴承及其工作方法" : CN201810276869.7. | 2018/3/30 . |
| APA | 姚立纲 , 陈刚 , 郑荣业 , 张隆 . 磁悬浮章动球轴承及其工作方法 : CN201810276869.7. | 2018/3/30 . |
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The ventricle assist device has emerged as an important therapeutic option in the treatment of both acute and chronic heart failure. The blood pumps, the major components of ventricle assist devices, have also progressed to the third generation. The magnetic levitation technologies have been applied into the third generation blood pumps. This paper proposes a novel miniscule maglev nutation pump with Magnetic bearing based on nutation principle. The calculation formula of magnetic force is established on the basis of the research for the operational principle of the magnetic bearing. Through establishing and solving the equations, the structural dimension and magnetization intensity of the magnetic bearing are obtained. Then, the three-dimensional model of the nutation pump is established. Furthermore, the structure design, manufacturing and assembling of the pump is completed. Finally, the simulation of the maglev nutation pump is carried out. And the effectiveness of the miniscule maglev nutation pump is verified.
Keyword ：
Maglev Maglev Manufacturing Manufacturing Nutation pump Nutation pump Simulation Simulation Ventricle assist device Ventricle assist device
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| GB/T 7714 | Lin, Fengxiang , Yao, Ligang , Zheng, Rongye et al. A Novel Ventricular Assist Miniscule Maglev Nutation Pump: Structure Design, 3D Modelling and Simulation [C] . 2017 : 443-453 . |
| MLA | Lin, Fengxiang et al. "A Novel Ventricular Assist Miniscule Maglev Nutation Pump: Structure Design, 3D Modelling and Simulation" . (2017) : 443-453 . |
| APA | Lin, Fengxiang , Yao, Ligang , Zheng, Rongye , Li, Wenjian , Fang, Changsheng . A Novel Ventricular Assist Miniscule Maglev Nutation Pump: Structure Design, 3D Modelling and Simulation . (2017) : 443-453 . |
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