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Frequency-controlable sine signal based on PWM and its implementation on FPGA
Lianzhen HUANG, Jiangang LI, Dongjun ZHANG
《机械工程前沿(英文)》 2012年 第7卷 第3期 页码 322-328 doi: 10.1007/s11465-012-0312-9
A sine generation method that the different frequent sine signals can be generated by the different Pulse-Width Modulation (PWM) signals generated by Field-Programmable Gate Array (FPGA) through low-pass filter of fixed parameters was proposed. The method just takes a few FPGA resources and was proved feasible by the theory. The experiment results and theory analysis tally.
关键词: Pulse-Width Modulation (PWM) Field-Programmable Gate Array (FPGA) frequency controllable
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
Toward a nonlinear control of an AC-DC-PWM converter dedicated to induction heating
Amel HADRI-HAMIDA, S. ZEROUALI, A. ALLAG
《能源前沿(英文)》 2013年 第7卷 第2期 页码 140-145 doi: 10.1007/s11708-013-0243-0
关键词: DC-DC converter AC-DC-pulse width modulation (PWM) converter induction heating nonlinear control
Power quality investigation of a solar PV transformer-less grid- connected system fed DVR
Akhil GUPTA,Saurabh CHANANA,Tilak THAKUR
《能源前沿(英文)》 2014年 第8卷 第2期 页码 240-253 doi: 10.1007/s11708-014-0322-x
关键词: data-based maximum power point tracking (MPPT) total harmonic distortion (THD) proportional integral control voltage restorer pulse width modulation
Hicham SERHOUD, Djilani BENATTOUS
《能源前沿(英文)》 2013年 第7卷 第3期 页码 380-387 doi: 10.1007/s11708-013-0252-z
关键词: brushless doubly-fed generator (BDFG) modeling grid connection control back-to-back pulse-width modulation (PWM) converter wind power generation
Youcef BEKAKRA,Djilani BEN ATTOUS
《能源前沿(英文)》 2014年 第8卷 第3期 页码 345-354 doi: 10.1007/s11708-014-0330-x
关键词: doubly fed induction generator (DFIG) wind turbine back-to-back pulse width modulation (PWM) DC-link voltage sliding mode control
Tang-tang GUO,Xing-liang LIU,Shi-qiang HAO,Chi ZHANG,Xiang-ning HE
《信息与电子工程前沿(英文)》 2015年 第16卷 第3期 页码 249-258 doi: 10.1631/FITEE.1400185
关键词: Dielectric barrier discharge Rectifier-compensated first harmonic approximation Parasitic capacitance Power converter design
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
Jianmin ZHOU, Shuo CHEN, Yang CHEN
《结构与土木工程前沿(英文)》 2013年 第7卷 第3期 页码 316-324 doi: 10.1007/s11709-013-0211-0
关键词: concrete beam high-strength steel bar crack width deformation
Influence of nozzle height to width ratio on ignition and NO
Liutao SUN, Yonghong YAN, Rui SUN, Zhengkang PENG, Chunli XING, Jiangquan WU
《能源前沿(英文)》 2021年 第15卷 第2期 页码 431-448 doi: 10.1007/s11708-021-0726-3
关键词: rectangular jet burner nozzle height to width ratio ignition characteristics pyrolyzed semicoke (SC) and bituminous blend NOx formation
史小红
《中国工程科学》 2012年 第14卷 第3期 页码 108-112
提出了一种采用双正交复序列的高效扩频调制与解调方法(DoCS)。输入数据比特流被分割为长度为M的组,每组的M比特作为输入码字,从2M-2个长度为L的DoCS序列中选择一条序列进行发送,被选中的序列以QPSK方式调制在载波上,实现扩频通信。文中还提出了一种前向相位校正(FPC)方法来解决该系统中收发两端的载波同步问题。
频率脉宽实时独立调节的脉冲种子源 Research Articles
杨志伟1,2,吴旭1,2,欧阳德钦2,张恩诚2,孙慧斌1,阮双琛1,2
《信息与电子工程前沿(英文)》 2021年 第22卷 第10期 页码 1379-1389 doi: 10.1631/FITEE.2000294
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
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
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
标题 作者 时间 类型 操作
Frequency-controlable sine signal based on PWM and its implementation on FPGA
Lianzhen HUANG, Jiangang LI, Dongjun ZHANG
期刊论文
A driving pulse edge modulation technique and its complex programming logic devices implementation
Xiao CHEN,Dong-chang QU,Yong GUO,Guo-zhu CHEN
期刊论文
Toward a nonlinear control of an AC-DC-PWM converter dedicated to induction heating
Amel HADRI-HAMIDA, S. ZEROUALI, A. ALLAG
期刊论文
Power quality investigation of a solar PV transformer-less grid- connected system fed DVR
Akhil GUPTA,Saurabh CHANANA,Tilak THAKUR
期刊论文
Simulation of grid connection and maximum power point tracking control of brushless doubly-fed generator in wind power system
Hicham SERHOUD, Djilani BENATTOUS
期刊论文
DFIG sliding mode control fed by back-to-back PWM converter with DC-link voltage control for variable speed wind turbine
Youcef BEKAKRA,Djilani BEN ATTOUS
期刊论文
Analysis and design of pulse frequency modulation dielectric barrier discharge for low power applications
Tang-tang GUO,Xing-liang LIU,Shi-qiang HAO,Chi ZHANG,Xiang-ning HE
期刊论文
Esophageal pulse oximetry is more accurate and detects hypoxemia earlier than conventional pulse oximetry
null
期刊论文
Calculation methods of the crack width and deformation for concrete beams with high-strength steel bars
Jianmin ZHOU, Shuo CHEN, Yang CHEN
期刊论文
Influence of nozzle height to width ratio on ignition and NO
Liutao SUN, Yonghong YAN, Rui SUN, Zhengkang PENG, Chunli XING, Jiangquan WU
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
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