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Weiwei CHEN, Jianpin QI, Wenzhen ZHU, Wenhua HUANG, Jinmei SONG
《医学前沿(英文)》 2009年 第3卷 第2期 页码 230-235 doi: 10.1007/s11684-009-0023-8
关键词: computed tomography angiography computed tomography perfusion
Zhonghua Sun
《医学前沿(英文)》 2011年 第5卷 第3期 页码 254-270 doi: 10.1007/s11684-011-0153-7
关键词: cardiovascular disease multislice computed tomography three-dimensional reconstruction diagnosis visualization
Toshifumi MUKUNOKI, Ta Thi HOAI, Daisuke FUKUSHIMA, Teppei KOMIYA, Takayuki SHIMAOKA
《结构与土木工程前沿(英文)》 2019年 第13卷 第3期 页码 640-652 doi: 10.1007/s11709-018-0502-6
关键词: mechanical property municipal solid waste incineration residues coal fly ash unconfined compression test image analysis X-Ray Computed Tomography scanners
Determining casting defects in near-net shape casting aluminum parts by computed tomography
Jiehua LI, Bernd OBERDORFER, Daniel HABE, Peter SCHUMACHER
《机械工程前沿(英文)》 2018年 第13卷 第1期 页码 48-52 doi: 10.1007/s11465-018-0493-y
Three types of near-net shape casting aluminum parts were investigated by computed tomography to determine casting defects and evaluate quality. The first, second, and third parts were produced by low-pressure die casting (Al-12Si-0.8Cu-0.5Fe-0.9Mg-0.7Ni-0.2Zn alloy), die casting (A356, Al-7Si-0.3Mg), and semi-solid casting (A356, Al-7Si-0.3Mg), respectively. Unlike die casting (second part), low-pressure die casting (first part) significantly reduced the formation of casting defects (i.e., porosity) due to its smooth filling and solidification under pressure. No significant casting defect was observed in the third part, and this absence of defects indicates that semi-solid casting could produce high-quality near-net shape casting aluminum parts. Moreover, casting defects were mostly distributed along the eutectic grain boundaries. This finding reveals that refinement of eutectic grains is necessary to optimize the distribution of casting defects and reduce their size. This investigation demonstrated that computed tomography is an efficient method to determine casting defects in near-net shape casting aluminum parts.
关键词: near-net shape casting aluminum parts casting defects low pressure die casting die casting semi-solid casting computed tomography
Eric N. LANDIS, Roman KRAVCHUK, Dmitry LOSHKOV
《结构与土木工程前沿(英文)》 2019年 第13卷 第1期 页码 190-200 doi: 10.1007/s11709-018-0487-1
关键词: ultra-high-performance concrete concrete fracture X-ray computed tomography acoustic emission
Early diagnosis and therapeutic choice of
Jing LI, Ying FU, Ji-Yao WANG, Chuan-Tao TU, Xi-Zhong SHEN, Lei LI, Wei JIANG
《医学前沿(英文)》 2010年 第4卷 第3期 页码 308-316 doi: 10.1007/s11684-010-0103-9
关键词:
liver abscess
Machine perfusion versus cold storage of livers: a meta-analysis
null
《医学前沿(英文)》 2016年 第10卷 第4期 页码 451-464 doi: 10.1007/s11684-016-0474-7
Different organ preservation methods are key factors influencing the results of liver transplantation. In this study, the outcomes of experimental models receiving donation after cardiac death (DCD) livers preserved through machine perfusion (MP) or static cold storage (CS) were compared by conducting a meta-analysis. Standardized mean difference (SMD) and 95% confidence interval (CI) were calculated to compare pooled data from two animal species. Twenty-four studies involving MP preservation were included in the meta-analysis. Compared with CS preservation, MP can reduce the levels of aspartate aminotransferase (AST), alanine aminotransferase (ALT), lactate dehydrogenase (LDH), and hyaluronic acid (HA) and the changes in liver weight. By contrast, MP can enhance bile production and portal vein flow (PVF). Alkaline phosphatase (ALP) levels and histological changes significantly differed between the two preservation methods. In conclusion, MP of DCD livers is superior to CS in experimental animals.
结合全变分最小化和稀疏字典学习后处理的低剂量CT重建 Article
Yong DING, Tuo HU
《信息与电子工程前沿(英文)》 2017年 第18卷 第12期 页码 2001-2008 doi: 10.1631/FITEE.1700287
Modelling and diagnostics of multiple cathodes plasma torch system for plasma spraying
Kirsten BOBZIN, Nazlim BAGCIVAN, Lidong ZHAO, Ivica PETKOVIC, Jochen SCHEIN, Karsten HARTZ-BEHREND, Stefan KIRNER, José-Luis MARQUéS, Günter FORSTER
《机械工程前沿(英文)》 2011年 第6卷 第3期 页码 324-331 doi: 10.1007/s11465-011-0125-2
Usage of a multiple-arcs system has significantly improved process stability and coating properties in air plasma spraying. However, there are still demands on understanding and controlling the physical process to determine process conditions for reproducible coating quality and homogeneity of coating microstructure. The main goal of this work is the application of numerical simulation for the prediction of the temperature profiles at the torch outlet for real process conditions. Behaviour of the gas flow and electric arcs were described in a three-dimensional numerical model. The calculated results showed the characteristic triangular temperature distribution at the torch nozzle outlet caused by three electric arcs. These results were compared with experimentally determined temperature distributions, which were obtained with specially developed computed tomography equipment for reconstructing the emissivity and temperature distribution of the plasma jet close to the torch exit. The calculated results related to temperature values and contours were verified for the most process parameters with experimental ones.
关键词: plasma spraying electric arc three-cathode plasma torch numerical simulation computed tomography
Hui YANG, Hairong FANG, Yuefa FANG, Xiangyun LI
《机械工程前沿(英文)》 2021年 第16卷 第1期 页码 46-60 doi: 10.1007/s11465-020-0606-2
关键词: 5-DOF hybrid manipulator reconfigurable base large workspace dimensional synthesis optimal design
“机械灌注+”应用于扩大标准供肝移植——肝尽其用 Review
王周城, Jack Martin, 余炯杰, 汪恺, Kourosh Saeb-Parsy, 徐骁
《工程(英文)》 2024年 第32卷 第1期 页码 30-41 doi: 10.1016/j.eng.2023.11.003
移植是终末期肝病最有效的治疗方法,但由于供体器官的短缺而受到限制。扩大标准供体(ECD)供肝在临床实践中越来越多地用于缓解这一挑战。然而,这些移植物耐受缺血的能力下降,危及冷保存期间器官的活力。机器灌注(MP)旨在改善器官保存并减少移植后并发症。然而,越来越明显的是,单独使用MP无法达到ECD供肝的最佳保存。因此,人们逐渐开始重视改良的 MP 策略,包括使用不同的灌注剂、改良的灌注方式并结合不同的治疗干预策略。本文中,我们提出了“机械灌注+”的新理念,代表这些旨在提升器官功能并可能实现ECD供肝体外再生的机械灌注新策略。为此,我们总结了现有和改良的MP策略,并阐述其在临床场景中修复不同ECD供肝的优势。
WANG Hong, HUANG Lan, JIN Jun, SONG Yaoming, GENG Zhaohua, YU Xuejun, QIN Jun, ZHAO Gang, GAO Yunhua, LIU Zheng
《医学前沿(英文)》 2007年 第1卷 第1期 页码 62-67 doi: 10.1007/s11684-007-0013-7
Bingxi He,Yu Guo,Yongbei Zhu,Lixia Tong,Boyu Kong,Kun Wang,Caixia Sun,Hailin Li,Feng Huang,Liwei Wu,Meng Wang,Fanyang Meng,Le Dou,Kai Sun,Tong Tong,Zhenyu Liu,Ziqi Wei,Wei Mu,Shuo Wang,Zhenchao Tang,
《工程(英文)》 doi: 10.1016/j.eng.2023.02.013
关键词: Computed tomography Diagnosis Deep learning Lung cancer Raw data
CHEN De-yun, YANG Cong-jing, ZHENG Gui-bin, YU Xiao-yang, SUN Li-juan
《机械工程前沿(英文)》 2006年 第1卷 第2期 页码 242-247 doi: 10.1007/s11465-006-0008-0
关键词: multiphase unequal interval capacitance tomography pattern sensitivity
珊瑚岛礁环境噪声成像 Article
夏少红, 张昌榕, 曹敬贺
《工程(英文)》 2023年 第25卷 第6期 页码 182-193 doi: 10.1016/j.eng.2021.09.022
As valuable land in the ocean, coral islands are not only important bases for making use of marine resources and protecting marine rights and interests, but also important for breakthrough research in many fields of earth science. Hence, the economical and efficient determination of the underground structure of coral islands has become significant in coral island engineering geology, but remains challenging for traditional marine geophysical prospecting and drilling methods. While ambient noise tomography with dense arrays has been widely used in continental regions, its applicability to coral islands remains undetermined. In this study, based on the data recorded by a dense array on an isolated coral island in the South China Sea, we analyzed the ambient noise characteristics and obtained a 3D subsurface structure of the coral island using ambient noise tomography. We made the following findings: ① The ambient noise frequencies can be roughly categorized into three levels: < 1, 1–5, and > 5 Hz. The spectral characteristics of the noise below 5 Hz were consistent at different stations, but there were significant differences in the characteristics of the noise above 5 Hz. ② For ambient noise frequencies below 5 Hz, cross-correlation functions with high quality could be obtained with only 24 h of waveform data. However, it was difficult to extract meaningful cross-correlation functions for ambient noise frequencies above 5 Hz. ③ The S-wave velocity in the coral island was higher toward the sea and lower toward the lagoon, which was consistent with the high degree of cementation of the outer reef flat stratum on the seaward side. ④ There were two low-velocity horizons at 25–75 and 200–300 m, which were in good agreement with the high-porosity horizons that were revealed by drilling core samples, reflecting the weathering history of the reef. Our research demonstrates that ambient noise tomography is a potentially economical, efficient, and environmentally friendly method for the geological prospecting of coral reefs.
关键词: Coral island Ambient noise tomography Engineering geology South China Sea
标题 作者 时间 类型 操作
Simultaneous acquisition of CT angiography and whole brain CT perfusion images by using multiphase dynamic
Weiwei CHEN, Jianpin QI, Wenzhen ZHU, Wenhua HUANG, Jinmei SONG
期刊论文
Multislice computed tomography angiography in the diagnosis of cardiovascular disease: 3D visualizations
Zhonghua Sun
期刊论文
properties of municipal solid waste incineration residues with cement and coal fly ash using X-ray ComputedTomography scanners
Toshifumi MUKUNOKI, Ta Thi HOAI, Daisuke FUKUSHIMA, Teppei KOMIYA, Takayuki SHIMAOKA
期刊论文
Determining casting defects in near-net shape casting aluminum parts by computed tomography
Jiehua LI, Bernd OBERDORFER, Daniel HABE, Peter SCHUMACHER
期刊论文
Experimental investigations of internal energy dissipation during fracture of fiber-reinforced ultra-high-performance concrete
Eric N. LANDIS, Roman KRAVCHUK, Dmitry LOSHKOV
期刊论文
Early diagnosis and therapeutic choice of
Jing LI, Ying FU, Ji-Yao WANG, Chuan-Tao TU, Xi-Zhong SHEN, Lei LI, Wei JIANG
期刊论文
Modelling and diagnostics of multiple cathodes plasma torch system for plasma spraying
Kirsten BOBZIN, Nazlim BAGCIVAN, Lidong ZHAO, Ivica PETKOVIC, Jochen SCHEIN, Karsten HARTZ-BEHREND, Stefan KIRNER, José-Luis MARQUéS, Günter FORSTER
期刊论文
Dimensional synthesis of a novel 5-DOF reconfigurable hybrid perfusion manipulator for large-scale sphericalhoneycomb perfusion
Hui YANG, Hairong FANG, Yuefa FANG, Xiangyun LI
期刊论文
Evaluation of the effect of myocardial perfusion after percutaneous coronary intervention in coronary
WANG Hong, HUANG Lan, JIN Jun, SONG Yaoming, GENG Zhaohua, YU Xuejun, QIN Jun, ZHAO Gang, GAO Yunhua, LIU Zheng
期刊论文
From Signal to Knowledge: The Diagnostic Value of Raw Data in the Artificial Intelligence Prediction of Human Data for the First Time
Bingxi He,Yu Guo,Yongbei Zhu,Lixia Tong,Boyu Kong,Kun Wang,Caixia Sun,Hailin Li,Feng Huang,Liwei Wu,Meng Wang,Fanyang Meng,Le Dou,Kai Sun,Tong Tong,Zhenyu Liu,Ziqi Wei,Wei Mu,Shuo Wang,Zhenchao Tang,
期刊论文
of plotting sensor sensitivity field and image reconstruction algorithm for electrical capacitance tomography
CHEN De-yun, YANG Cong-jing, ZHENG Gui-bin, YU Xiao-yang, SUN Li-juan
期刊论文