搜索结果: 1-15 共查到“知识库 工学 RF-1”相关记录63条 . 查询时间(0.06 秒)
针对人体关节点序列的连续行为识别问题，提出了一种基于BSCPs-RF（B-spline control points-random forest）的人体关节点信息行为识别与预测方法.首先采用局部线性回归与单帧关节点归一化法预处理关节点序列，以此消除抖动噪声、位移和尺度的影响；然后以B样条曲线控制点作为速度无关的关节点序列特征，并采用同步语音提示词法标注实时行为序列以提高样本采集效率；最后采用基于随...
A SEMI-RIGOROUS SENSOR MODEL FOR PRECISION GEOMETRIC PROCESSING OF MINI-RF BISTATIC RADAR IMAGES OF THE MOON
SAR bistatic sensor models extraterrestrial Moon
2016/11/8
The spaceborne synthetic aperture radar (SAR) instruments known as Mini-RF were designed to image shadowed areas of the lunar poles and assay the presence of ice deposits by quantitative polarimetry. ...
Regular analog/RF IC design using optimization with recourse including ellipsoidal uncertainty
Design cycle radio frequency integrated circuits nanoscale integrated circuit technology the rf analog circuit
2015/8/10
Long design cycles due to the inability to predict silicon realities are a well-known problem that plagues analog/RF integrated circuit product development. As this problem worsens for nanoscale IC te...
Simultaneous Generation and Transmission of 60-GHz RF and Baseband Signals Employing Only a Simple Single Electrode MZM
Simultaneous Generation Transmission Baseband Signals Employing Only Simple Single Electrode MZM
2015/7/15
Employing only a simple single electrode MZM, a novel hybrid access network, which is capable of generating and transmitting RF-vector (2.5-Gb/s QPSK at 60GHz) and baseband signals (1.25-Gb/s OOK) sim...
The Impact of Uninformed RF Interference on GBAS and Potential Mitigations
Uninformed RF Interference GBAS Potential Mitigations
2015/6/24
RF interference (RFI) has been and will continue to be a significant worry for GNSS users. This paper introduces several different types of RFI, categorizes them based upon the intent (if any) of the ...
Optimal Basis For Ultrasound RF Apertures: Applications to Real-Time Compression and Beamforming
ultrasound rf compression beamforming Karhunen-Loeve Transform 2D FFT
2014/12/8
Modern medical ultrasound machines produce enormous amounts of data, as much as several gigabytes/sec in some systems. The challenges of generating, storing, processing and reproducing such voluminous...
RF/AP纳米复合材料的制备与表征
材料科学 溶胶凝胶法 RF/AP纳米复合材料 热分解
2014/3/4
采用溶胶-凝胶法经冷冻干燥制备了不同AP含量的RF/AP纳米复合材料。用FTIR、XRD、SEM、BET比表面积分析仪及TG/DSC对RF/AP纳米复合材料进行了表征。结果表明，溶胶凝胶制备过程对AP结构及晶型未造成破坏。当AP质量分数小于60%，随着AP含量的增加，RF/AP纳米复合材料的比表面积由11.23m2·g-1下降至0.29m2·g-1。且RF/AP纳米复合材料的放热峰温逐渐延后，放...
The correlation of deposition parameters,microstructure,and stability of rf-diode sputtered magneto-optical thin films has been studied by using transmission electron microscopy and a magneto-optical ...
RF MEMS电容式开关结构层释放技术
RF MEMS 电容式开关 聚酰亚胺 释放
2014/4/23
研究了RF MEMS开关的制造工艺流程和聚酰亚胺牺牲层的去除工艺。在开关的设计和加工中采用在信号线两侧的地线上生长一层绝缘介质层，直流偏置线生成在绝缘介质层之上，与桥的锚点相连接，实现了交直流隔离。讨论了干法刻蚀和湿法刻蚀牺牲层技术。干法刻蚀容易造成绝缘介质层的刻蚀和损伤。采用湿法刻蚀结合临界点干燥技术，可以获得理想的微梁结构。通过测试，开关样品的下拉电压为34-40V，下拉距离为1.7μm±0....
Using Dispersion in a Fiber-Optic Loop to Perform Time Domain Analogue RF Signal Auto-Correlation
Using Dispersion Fiber-Optic Perform Time Domain Analogue RF Signal Auto-Correlation
2015/5/22
We present an RF-photonic time-domain auto-correlator using a dispersion-induced stepped-time-delay of the modulation sidebands produced by a fiber optic recirculation loop circuit. This allows spectr...
Fully Reconfigurable Compact RF Photonic Filters Using High-Q Silicon Microdisk Resonators
Integrated optics devices Wavelength filtering devices.
2015/5/21
We present a fully reconfigurable fourth-order SOI RF-photonic filter with a tunable bandwidth of 0.9–5 GHz, FSR > 600 GHz, out-of-band rejection > 38 dB, and compact size (0.15 mm 2 ) using high-Q re...
On the efficiency of RF-Pilot-based nonlinearity compensation for CO-OFDM
efficiency RF-Pilot-based nonlinearity compensation CO-OFDM
2015/5/21
We investigate the efficiency of RF-pilot based phase noise compensation for mitigation of nonlinear impairments in CO-OFDM transmission. We show that the efficiency scales with the effective dispersi...
Impact of RF Noise on Transmission Performance of Multiband OFDM UWB over Fiber Systems
RF Noise Multiband OFDM UWB over Fiber Systems Transmission Performance
2015/5/15
We investigate the performance of multiband OFDM ultra wideband (UWB) signal over fiber system considering the impact of RF noise. A compensation technique is proposed to reduce RF noise impact.
在复杂的RF(Radio Frequency)电子系统中,采用传统的数值或实验方法,很难得到与电磁耦合相关问题的实用结果.因此,提出了采用电磁拓扑(EMT)来分析复杂电磁环境中的电磁兼容(EMC)问题.首先考虑到RF电路中有源器件的非线性特性,采用了SPICE二极管模型.然后对一个实际的功率检测电路进行了仿真分析和试验.结果表明,基于EMT的EMC分析方法是有效的,而且能够对系统的预测做出反应,可...
A Programmable Optical Filter Unit Cell Element for High Resolution RF Signal Processing in Silicon Photonics
Radio frequency photonics Analog Optical Signal Processing Integrated Optics
2015/6/10
We demonstrate the first reconfigurable, cascadable silicon photonics unit cell fabricated in commercial wafer-scale processes using a single 500ps delay line and allowing independent FIR and IIR resp...