A one-shot multispectral imaging system using a multispectral filter array (MSFA) provides a practical solution for compact, low-cost, andreal-time multispectral imaging. However, multispectral demosaicking is a chal...
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A one-shot multispectral imaging system using a multispectral filter array (MSFA) provides a practical solution for compact, low-cost, andreal-time multispectral imaging. However, multispectral demosaicking is a challenging problem because each spectral band is significantly undersampled in the MSFA. In this paper, we propose a novel demosaicking algorithm for the MSFA proposed in [1, 2]. Main contributions of this paper are (i) we utilize multispectral correlations for generating a guide image, which is effectively used for interpolation preserving image structures, and (ii) we effectively use residual interpolation (rI) [3] for generating the guide image and interpolating each spectral band. Experimental results demonstrate that our proposed algorithm significantly outperforms existing state-of-the-art algorithms.
In this paper, we consider a turnability of the Braitenberg's vehicle-type odor tracking robot with the sensors of different characteristics anddifferent connections between sensors and actuators. We have propose...
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ISBN:
(纸本)9781479901609
In this paper, we consider a turnability of the Braitenberg's vehicle-type odor tracking robot with the sensors of different characteristics anddifferent connections between sensors and actuators. We have proposed the odor plume tracking robot based on the simple structure, called Braitenberg's vehicle, and the robot has two gas sensors on left andright sides of the top of the robot, which drive two dC motor actuators directly. The gas sensors output are converted to the input velocity to motors, and then the moving direction, that is, the behavior of the robot depends on the connection of the sensors and actuators. We prepare two commercially available sensors with different recovery response property under two types of sensor-actuator connections, which are cross- and inhibition-like connections. Then we show that the turnability of the robot using a gas sensor in odor plume tracking can be improved and capture the odor source by modifying the connection structure between sensors and actuators.
A large part of operational and configuration information in networks and clouds has graph structure, e.g., virtual network topologies, IP flows, communication links of distributed cloud applications. The final object...
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A large part of operational and configuration information in networks and clouds has graph structure, e.g., virtual network topologies, IP flows, communication links of distributed cloud applications. The final objective of this work is to develop a scalable management system that allows real-time management applications, such as network analytics and anomaly detection applications, to search for graph-structured operational information. The paper contains a step towards this objective. The key challenge is to devise an efficient and scalable search process on data that is volatile anddistributed across the network infrastructure. Approaches that are currently pursued fordistributed graph databases are not applicable in this context. This paper presents design options and possible solutions for engineering a scalable graph search system that supports management applications. It includes a simple information model based on property graphs and a search query language based on keyword search. The architecture of the system centers around a distributed search plane that performs query processing using a network of search nodes. Finally, the paper outlines the design of a search node, which contains a local database that maintains graph partitions.
In response to democratization of Imagery, a recent leading theme in the scientific community, we discuss a persistent imaging experiment dataset, which is being considered for public release in a foreseeable future, ...
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In response to democratization of Imagery, a recent leading theme in the scientific community, we discuss a persistent imaging experiment dataset, which is being considered for public release in a foreseeable future, and present our observations analyzing a subset of the dataset. The experiment is a long-term collaborative effort among the Army research Laboratory, Army Armament rdEC, and Air Force Institute of technology that focuses on the collection and exploitation of longwave infrared (LWIr) hyperspectral and polarimetric imagery. In this paper, we emphasize the inherent challenges associated with using remotely sensed LWIr hyperspectral imagery for material recognition, and argue that the idealizeddata assumptions often made by the state of the art methods are too restrictive forreal operational scenarios. We treat LWIr hyperspectral imagery for the first time as Longitudinal data and aim at proposing a more realistic framework for material recognition as a function of spectral evolution over time. The defining characteristic of a longitudinal study is that objects are measuredrepeatedly through time and, as a result, data are dependent. This is in contrast to cross-sectional studies in which the outcomes of a specific event are observed by randomly sampling from a large population of relevant objects, where data are assumed independent. The scientific community generally assumes the problem of object recognition to be cross-sectional. We argue that, as data evolve over a full diurnal cycle, pattern recognition problems are longitudinal in nature and that by applying this knowledge it may lead to better algorithms.
Vertically aligned TiO2nanorods arrays were successfully synthesized on FTO glass by wet-chemical *** on polystyrene sulfate(PSS)functionalized TiO2nanorods arrays,a sandwich-structured hybrid UV photodetector was ***...
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Vertically aligned TiO2nanorods arrays were successfully synthesized on FTO glass by wet-chemical *** on polystyrene sulfate(PSS)functionalized TiO2nanorods arrays,a sandwich-structured hybrid UV photodetector was *** photo-to-dark current ratio of the device increases by more than 3 orders of magnitude with typical case,while the dark current is about 10 nA at 1 V *** high photoresponse together with the low dark current could probably contribute a large photocurrent and low-power *** high performance of the hybrid material and facile low-cost fabrication of the UV detector make the devices promising for large-area UV photodetection applications.
Poly-SiGe is widely used in MEMS applications as structural films for it's similar to poly-Si and compatible with standard CMOS (Al interconnects) backend processing. However, with its large as-deposited stress, i...
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Poly-SiGe is widely used in MEMS applications as structural films for it's similar to poly-Si and compatible with standard CMOS (Al interconnects) backend processing. However, with its large as-deposited stress, it becomes more and more challenging and critical to control stress relaxation for sensitivity improvement of MEMS. In this paper, we demonstrate eliminating the stress in poly-SiGe films used in pressure sensor as membrane by excimer laser thermal annealing (LTA). First, the threshold melting laser energy density (Ed th ) of poly-SiGe, the correlation between melting depth to laser Ed and the thermal profile are study by simulation. Then the bare andreal device wafers are processed by LTA (308 nm, 150 ns). It is demonstrated that stress can be released to the target exactly by setting a proper Ed for the stress are increasing linearly with laser Ed. And there's no contact open concern for surface temperature of AL is lower than 400C. Furthermore, the laser annealing seems to reduce surface roughness. Significantly, LTA is promising technique for surface properties modification in MEMS applications.
A low power consumption tunable dFB laserdiode array, integrated with backside waveguides, is experimentally demonstrated. Fiber output power of 14 dBm was obtained in full L-band with module power consumption less t...
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A low power consumption tunable dFB laserdiode array, integrated with backside waveguides, is experimentally demonstrated. Fiber output power of 14 dBm was obtained in full L-band with module power consumption less than 3 W.
This work presents a new efficient multi-level intermediate frequency pulse width modulation (ML-IFPWM) power coding algorithm for switch-mode power amplifier. The merits of high power coding efficiency with distortio...
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This work presents a new efficient multi-level intermediate frequency pulse width modulation (ML-IFPWM) power coding algorithm for switch-mode power amplifier. The merits of high power coding efficiency with distortion correction function are demonstrated by a FPGA implementeddigital front end. Measurement results have shown power coding efficiency greater than 45%. To our knowledge, this is the firstly reported implementeddiscrete-time domain 3-level power encoding approach with 5-MHz LTE signal at rF carrier frequency around 2 GHz. This can be used to generate multi-level digital pulse-train for advanced class-S PA in cellulardigital base stations.
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