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LIU Bin, SU Wanhua, WANG Hui, HUANG Haozhong
《能源前沿(英文)》 2007年 第1卷 第4期 页码 420-427 doi: 10.1007/s11708-007-0061-7
关键词: combustion compression homogenous in-cylinder modulated multi-pulse
Yang YU, Wanhua SU,
《能源前沿(英文)》 2010年 第4卷 第2期 页码 269-279 doi: 10.1007/s11708-009-0046-5
关键词: PCCI fuel stratification multi-pulse injection ignition
null
《医学前沿(英文)》 2012年 第6卷 第4期 页码 406-410 doi: 10.1007/s11684-012-0217-3
The esophagus is perfused directly by prominent arteries and may provide a more consistent tissue source for pulse oximetry. The goal of this study was to evaluate the sensitivity and accuracy of an esophageal pulse oximetry probe on patients during controlled hypoxemia in comparison to measurements obtained with conventional pulse oximetry (SpulseO2). Forty-five ASA I–II adult patients were included in this prospective observational study. Nellcor digital oximetric probes were placed on finger tips for SpulseO2 before anesthesia. After tracheal intubation, an esophageal probe was placed in the lower segment of the esophagus for esophageal oximetric monitoring (SoesO2). All patients were disconnected from the breathing circuit to establish a controlled hypoxemia, and were re-connected to the breathing circuit and ventilated with 100% oxygen immediately when SoesO2 dropped to 90%. Matched SoesO2 and SpulseO2 readings were recorded when SoesO2measurements were at 100%, 95%, 90% and the lowest reading. The time for SoesO2 and SpulseO2 to drop from 100% to 95%, 90% and return to 100% was recorded. Oxygen saturation from arterial blood samples (SartO2) was also measured at each time point respectively. The linear correlation coefficient of the regression analysis between SartO2 and SoesO2 was 0.954. The mean±2SD of the difference was 0.3%±4.3% for SoesO2vs. SartO2 and 6.8%±5.6% for SpulseO2vs. SartO2 (P<0.001). The 95% confidence interval for the absolute difference between SoesO2 and SartO2 was 0.3% to 0.7% and 6.2% to 7.4% between SpulseO2 and SartO2. The time to reach 90% saturation measured with SoesO2 was approximately 94 seconds earlier than the SpulseO2 (P<0.001). In conclusion, SoesO2 is more accurate and enables earlier detection of hypoxemia when compared to conventional pulse oximetry during hypoxemia for patients undergoing general anesthesia.
关键词: esophageal pulse oximetry conventional pulse oximetry hypoxemia
Hybrid genetic algorithm for bi-objective resource-constrained project scheduling
Fikri KUCUKSAYACIGIL, Gündüz ULUSOY
《工程管理前沿(英文)》 2020年 第7卷 第3期 页码 426-446 doi: 10.1007/s42524-020-0100-x
关键词: backward–forward scheduling hybrid bi-objective genetic algorithm injection procedure maximum cash balance multi-objective multi-project multi-mode resource-constrained project scheduling problem
Bin Xu, Toshiro Kaneko, Toshiaki Kato
《化学科学与工程前沿(英文)》 2019年 第13卷 第3期 页码 485-492 doi: 10.1007/s11705-019-1831-2
关键词: single-walled carbon nanotubes chirality-controlled synthesis pulse plasma chemical vapor deposition
Three-dimensional numerical simulation for plastic injection-compression molding
Yun ZHANG, Wenjie YU, Junjie LIANG, Jianlin LANG, Dequn LI
《机械工程前沿(英文)》 2018年 第13卷 第1期 页码 74-84 doi: 10.1007/s11465-018-0490-1
Compared with conventional injection molding, injection-compression molding can mold optical parts with higher precision and lower flow residual stress. However, the melt flow process in a closed cavity becomes more complex because of the moving cavity boundary during compression and the nonlinear problems caused by non-Newtonian polymer melt. In this study, a 3D simulation method was developed for injection-compression molding. In this method, arbitrary Lagrangian-Eulerian was introduced to model the moving-boundary flow problem in the compression stage. The non-Newtonian characteristics and compressibility of the polymer melt were considered. The melt flow and pressure distribution in the cavity were investigated by using the proposed simulation method and compared with those of injection molding. Results reveal that the fountain flow effect becomes significant when the cavity thickness increases during compression. The back flow also plays an important role in the flow pattern and redistribution of cavity pressure. The discrepancy in pressures at different points along the flow path is complicated rather than monotonically decreased in injection molding.
关键词: injection-compression molding simulation injection molding melt flow cavity pressure
density measurement for plastic injection molding via ultrasonic technology
《机械工程前沿(英文)》 2022年 第17卷 第4期 doi: 10.1007/s11465-022-0714-2
关键词: ultrasonic measurement melt density in-situ measurement injection molding
A modified pulse charging method for lithium-ion batteries by considering stress evolution, charging
Yanfei ZHAO, Bo LU, Yicheng SONG, Junqian ZHANG
《结构与土木工程前沿(英文)》 2019年 第13卷 第2期 页码 294-302 doi: 10.1007/s11709-018-0460-z
关键词: fast charging method pulse charging stress evolution charging time capacity utilization
混合多端直流输电系统保护方法研究 Article
郑玉平, 何佳伟, 李斌, 吴通华, 戴魏, 李晔
《工程(英文)》 2021年 第7卷 第8期 页码 1064-1075 doi: 10.1016/j.eng.2021.05.002
近年来,混合多端直流输电系统快速发展。但是,在混合直流系统中应用的电压源换流器(voltage-source converter, VSC)出口不再需要直流滤波器。此外,考虑到其直流故障电流可被换流器自身有效抑制,直流线路两端也不再需要安装限流电抗器。这意味着线路两端边界缺失,导致应用于常规高压直流输电(line commutated converter based high-voltage direct current, LCC-HVDC)系统和柔性直流(VSC-HVDC)电网的单端量保护均无法适用于混合多端直流输电系统。为此,本文提出了一种适用于混合多端直流输电系统的单端量保护新原理,该方法主要基于暂态信息和主动注入思想实现故障辨识。与应用于LCCHVDC和VSC-HVDC系统的单端量保护相比,所提方法无需依赖线路两端的边界元件,因此更加适用于混合多端直流系统。大量的仿真算例充分验证了所提方法的可行性和优越性。
关键词: 混合多端直流输电系统 单端量保护 暂态量信息 主动注入
Trend prediction technology of condition maintenance for large water injection units
Xiaoli XU, Sanpeng DENG
《机械工程前沿(英文)》 2010年 第5卷 第2期 页码 171-175 doi: 10.1007/s11465-009-0091-0
关键词: water injection units condition-based maintenance trend prediction
High frequency group pulse electrochemical machining
WU Gaoyang, ZHANG Zhijing, ZHANG Weimin, TANG Xinglun
《机械工程前沿(英文)》 2007年 第2卷 第3期 页码 293-296 doi: 10.1007/s11465-007-0051-5
关键词: HGPECM process machining quality passivation inter-electrode
《结构与土木工程前沿(英文)》 页码 855-869 doi: 10.1007/s11709-023-0972-z
关键词: masonry arch bridges seismic behavior modal properties pulse-like records nonlinear time history analysis
Intelligent methods for the process parameter determination of plastic injection molding
Huang GAO, Yun ZHANG, Xundao ZHOU, Dequn LI
《机械工程前沿(英文)》 2018年 第13卷 第1期 页码 85-95 doi: 10.1007/s11465-018-0491-0
Injection molding is one of the most widely used material processing methods in producing plastic products with complex geometries and high precision. The determination of process parameters is important in obtaining qualified products and maintaining product quality. This article reviews the recent studies and developments of the intelligent methods applied in the process parameter determination of injection molding. These intelligent methods are classified into three categories: Case-based reasoning methods, expert system-based methods, and data fitting and optimization methods. A framework of process parameter determination is proposed after comprehensive discussions. Finally, the conclusions and future research topics are discussed.
关键词: injection molding intelligent methods process parameters optimization
A driving pulse edge modulation technique and its complex programming logic devices implementation
Xiao CHEN,Dong-chang QU,Yong GUO,Guo-zhu CHEN
《信息与电子工程前沿(英文)》 2015年 第16卷 第12期 页码 1088-1098 doi: 10.1631/FITEE.1500111
关键词: Driving pulse edge modulation Switching voltage spike Complex programmable logic device (CPLD) Active gate drive
标题 作者 时间 类型 操作
Characteristics and energy distribution of modulated multi-pulse injection modes based diesel HCCI combustion
LIU Bin, SU Wanhua, WANG Hui, HUANG Haozhong
期刊论文
Effect of distributions of fuel concentration and temperature on ignition processes in a diesel PCCI combustion
Yang YU, Wanhua SU,
期刊论文
Esophageal pulse oximetry is more accurate and detects hypoxemia earlier than conventional pulse oximetry
null
期刊论文
Hybrid genetic algorithm for bi-objective resource-constrained project scheduling
Fikri KUCUKSAYACIGIL, Gündüz ULUSOY
期刊论文
Improvement in growth yield of single-walled carbon nanotubes with narrow chirality distribution by pulse
Bin Xu, Toshiro Kaneko, Toshiaki Kato
期刊论文
Three-dimensional numerical simulation for plastic injection-compression molding
Yun ZHANG, Wenjie YU, Junjie LIANG, Jianlin LANG, Dequn LI
期刊论文
A modified pulse charging method for lithium-ion batteries by considering stress evolution, charging
Yanfei ZHAO, Bo LU, Yicheng SONG, Junqian ZHANG
期刊论文
Trend prediction technology of condition maintenance for large water injection units
Xiaoli XU, Sanpeng DENG
期刊论文
High frequency group pulse electrochemical machining
WU Gaoyang, ZHANG Zhijing, ZHANG Weimin, TANG Xinglun
期刊论文
Performance-based seismic assessment of a historical masonry arch bridge: Effect of pulse-like excitations
期刊论文
Intelligent methods for the process parameter determination of plastic injection molding
Huang GAO, Yun ZHANG, Xundao ZHOU, Dequn LI
期刊论文