摘要 :
This paper presents design and implementation of intelligent power management devices using user location, user motion detection and user living patterns in home networks. Our design integrates the device to be controlled, the int...
展开
This paper presents design and implementation of intelligent power management devices using user location, user motion detection and user living patterns in home networks. Our design integrates the device to be controlled, the intelligent Power Management Device (iPMD), and the adaptive light-weight middleware so that it can be used with minimal power consumption for a wide range of applications. iPMD which will be installed in every power outlet in a home, is made up of five blocks: the pyroelectric infrared (PIR) sensor circuit, the light sensor circuit, the microprocessor, the power meter with a LED display and the PLC module. iPMD detects if a human body enters the detection area or not. If there is no human body present, all controlled appliances are turned off and iPMDs help reduce standby power consumption. If there is, the iPMD detects the light intensity under the environment and maintains sufficient light by controlling the nearby lights. An iPMD transmits and receives the sensor data from nearby iPMDs so the IPG can control different lights and appliances in different regions. iPMDs also communicate with the lightweight middleware at an Intelligent Power Gateway (IPG) that adaptively reason the optimal power control by analyzing user living pattern from the sensing data from devices. The experimental results obtained from the real apartments show that the total power consumption can be reduced up to 7.5 %1.
收起
摘要 :
We consider regularized channel inversion (RI) precoding in the multiuser multiple input multiple output (Mu- MIMO) broadcast channels. To make the RI operate in quantized channel feedback condition, we analyze the quantization er...
展开
We consider regularized channel inversion (RI) precoding in the multiuser multiple input multiple output (Mu- MIMO) broadcast channels. To make the RI operate in quantized channel feedback condition, we analyze the quantization error variance and its effect on the signal to interference plus noise power ratio (SINR) of the user signals. The regularization parameter ;1; is optimized to balance the additive noise, the multiuser interference and the interference due to the quantization error and to maximize SINR. Analysis and simulations show that regularization enhances the performance of zero forcing beam forming (ZFBF) over the whole signal to noise power ratio (SNR) range. This is contrasting to the perfect channel status information (CSI) case, where the enhancement is observed in the low SNR region.
收起
摘要 :
Contour representations of binary images of handwritten words afford considerable reduction in storage requirements while providing lossless representation. On the other hand, the one-dimensional nature of contours presents intere...
展开
Contour representations of binary images of handwritten words afford considerable reduction in storage requirements while providing lossless representation. On the other hand, the one-dimensional nature of contours presents interesting challenges for processing images for handwritten word recognition. Our experiments indicate that significant gains are to be realized in both speed and recognition accuracy by using a contour representation in handwriting applications.
收起
摘要 :
The electronic structures of ${rm AgNi}_{1-{rm x}}{rm Co}_{rm x}{rm O}_{2}$ $(0leq{rm x}leq 1)$ delafossite oxides have been investigated by employing photoemission spectroscopy (PES) and X-ray absorption spectroscopy (XAS) in t...
展开
The electronic structures of ${rm AgNi}_{1-{rm x}}{rm Co}_{rm x}{rm O}_{2}$ $(0leq{rm x}leq 1)$ delafossite oxides have been investigated by employing photoemission spectroscopy (PES) and X-ray absorption spectroscopy (XAS) in the soft X-ray regime of synchrotron radiation. The Ag 3d core-level PES spectra shift toward the higher binding energy with increasing x, in agreement with the metallic nature for low values of x and the insulating nature for high values of x in ${rm AgNi}_{1-{rm x}}{rm Co}_{rm x}{rm O}_{2}$ . Further, the Ag 3d core-level PES spectra become more asymmetric with decreasing x, which reflects the larger number of electron-hole pairs in the Ni-rich regime. Valence-band PES spectra reveal that the band width of the occupied Ni 3d states is broader than that of the Co 3d states, implying the larger Ni 3d-O 2p hybridization than the Co 3d-O 2p hybridization. The Co and Ni 2p XAS spectra show that Co ions are in the low-spin ${rm Co}^{3+}$ states for all x, while Ni ions are in the ${rm Ni}^{2+}-{rm Ni}^{3+}$ mixed-valent states. The ${rm Ni}^{3+}$ component increases with x.
收起
摘要 :
The ringing mechanism of the high impedance output node was analysed. To reduce this ringing, a new compensation circuit was developed and implemented in a standard CMOS process. This circuit can be programmed to cover a range of ...
展开
The ringing mechanism of the high impedance output node was analysed. To reduce this ringing, a new compensation circuit was developed and implemented in a standard CMOS process. This circuit can be programmed to cover a range of parameters. It is effective in minimising the settling time of a DAC.
收起
