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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
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
Multi-harmonic forced vibration and resonance of simple beams to moving vehicles
《结构与土木工程前沿(英文)》 页码 981-993 doi: 10.1007/s11709-023-0979-5
关键词: forced vibration linear Euler beam moving load harmonic structure frequency modulation end restraints
基于二维非周期相位调制的步进线性调频成像雷达干扰方法 Research Article
吴其华,赵锋,赵铁华,刘晓斌,王俊杰,肖顺平
《信息与电子工程前沿(英文)》 2023年 第24卷 第3期 页码 433-446 doi: 10.1631/FITEE.2200298
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。
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
《医学前沿(英文)》 2022年 第16卷 第2期 页码 227-239 doi: 10.1007/s11684-021-0896-8
关键词: cannabidiol depression radial neural stem cells neurogenesis
王玉兰, 王保红, 吴俊芳, 江向洋, 唐惠儒, Ole H. Nielsen
《工程(英文)》 2017年 第3卷 第1期 页码 83-89 doi: 10.1016/J.ENG.2017.01.013
人类微生态是寄居在人体中的微生物聚集体,且主要存在于胃肠道(GIT) 中。肠道微生态随着人体发育而演化,并在人类健康和疾病中起着重要作用。近年来,由于微生态会影响宿主代谢、生理学和免疫系统发育,而且微生态紊乱可能导致许多疾病,其越来越受到人们的关注。肠道微生态可能与恶性肿瘤有一定联系,如胃癌和结直肠癌;也可能与其他一些疾病有关,如非酒精性脂肪肝(NAFLD)、被称为工业化世界“生活方式疾病”的肥胖和糖尿病、冠心病以及中枢神经系统紊乱。虽然分子技术革命为我们更准确地研究肠道微生态提供了必要的工具,但是我们需要更精确地阐明其与某些人类疾病病理变化的关系,明确微生态在不同疾病中的作用是新的治疗策略发展的基础。本文概述了肠道微生态对人类健康的重要影响以及调整肠道菌群结构的潜在用途,如菌群移植用于治疗耐药艰难梭菌(C. difficile) 的感染。通过微生态干预调整肠道区域以改善人类健康的概念虽刚刚兴起,但其治疗意义显著。因此,抑制有害菌、促进有益菌可能会保护人类健康,并且这些努力将为探索发展更加合理的治疗方案打下基础。
A frequency error estimation for isogeometric analysis of Kirchhoff–Love cylindrical shells
《结构与土木工程前沿(英文)》 doi: 10.1007/s11709-023-0006-x
关键词: isogeometric analysis Kirchhoff–Love cylindrical shell free vibration frequency error convergence
Song ZHANG, Lelun WANG, Anze YI, Honggang GU, Xiuguo CHEN, Hao JIANG, Shiyuan LIU
《机械工程前沿(英文)》 2020年 第15卷 第2期 页码 256-264 doi: 10.1007/s11465-019-0573-7
关键词: ferroelectric liquid crystal polarization rotator (FLCPR) dual liquid crystal Mueller matrix polarizer design and optimization
Xiaowei LUO, Yannick BENICHOU, Suyuan YU
《能源前沿(英文)》 2013年 第7卷 第4期 页码 506-510 doi: 10.1007/s11708-013-0275-5
关键词: aerosol particles collision frequency function coagulation
Insight into the role of cholesterol in modulation of morphology and mechanical properties of CHO-K1
Lei Zhang, Lisha Zhao, Ping-Kai Ouyang, Pu Chen
《化学科学与工程前沿(英文)》 2019年 第13卷 第1期 页码 98-107 doi: 10.1007/s11705-018-1775-y
Cholesterol plays a significant role in the organization of lipids and modulation of membrane dynamics in mammalian cells. However, the effect of cholesterol depletion on the eukaryotic cell membranes seems controversial. In this study, the effects of cholesterol on the topography and mechanical behaviors of CHO-K1 cells with manipulated membrane cholesterol contents were investigated by atomic force microscopy (AFM) technique. Here, we found that the depletion of cholesterol in cell membranes could increase the membrane stiffness, reduce the cell height as well as promote cell retraction and detachment from the surface, whereas the cholesterol restoration could reverse the effect of cholesterol depletion on the membrane stiffness. Increased methyl-β-cyclodextrin levels and incubation time could significantly increase Young’s modulus and degree of stiffing on cell membrane and cytoskeleton. This research demonstratede importance of cholesterol in regulating the dynamics of cytoskeleton-mediated processes. AFM technique offers excellent advantages in the dynamic monitoring of the change in membranes mechanical properties and behaviors during the imaging process. This promising technology can be utilized in studying the membrane properties and elucidating the underlying mechanism of distinct cells in the near-native environment.
关键词: cholesterol methyl-β-cyclodextrin atomic force microscopy Young’s modulus CHO-K1 cell
Fuel variability effect on flickering frequency of diffusion flames
Jizhao LI, Yang ZHANG
《能源前沿(英文)》 2009年 第3卷 第2期 页码 134-140 doi: 10.1007/s11708-009-0034-9
关键词: fuel variability flickering frequency diffusion flames dynamics of combustion
Capacity limitation of nuclear units in grid based on analysis of frequency regulation
Yiping DAI, Pan JIANG, Lin GAO, Weimin KAN, Xiaoqing XIAO, Ge JIN
《能源前沿(英文)》 2012年 第6卷 第2期 页码 148-154 doi: 10.1007/s11708-012-0174-1
关键词: nuclear units capacity overspeed primary frequency control (PFC) second frequency control (SFC)
Oscillation frequency of simplified arterial tubes
Hui AN, Fan HE, Lingxia XING, Xiaoyang LI
《机械工程前沿(英文)》 2009年 第4卷 第3期 页码 300-304 doi: 10.1007/s11465-009-0038-5
关键词: spatial kinematics natural frequency finite element method
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
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
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
Cannabidiol prevents depressive-like behaviors through the modulation of neural stem cell differentiation
期刊论文
Dynamic modulation performance of ferroelectric liquid crystal polarization rotators and Mueller matrix
Song ZHANG, Lelun WANG, Anze YI, Honggang GU, Xiuguo CHEN, Hao JIANG, Shiyuan LIU
期刊论文
Calculation of collision frequency function for aerosol particles in free molecule regime in presence
Xiaowei LUO, Yannick BENICHOU, Suyuan YU
期刊论文
Insight into the role of cholesterol in modulation of morphology and mechanical properties of CHO-K1
Lei Zhang, Lisha Zhao, Ping-Kai Ouyang, Pu Chen
期刊论文
Capacity limitation of nuclear units in grid based on analysis of frequency regulation
Yiping DAI, Pan JIANG, Lin GAO, Weimin KAN, Xiaoqing XIAO, Ge JIN
期刊论文