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https://www.readbyqxmd.com/read/28430164/state-estimation-using-dependent-evidence-fusion-application-to-acoustic-resonance-based-liquid-level-measurement
#1
Xiaobin Xu, Zhenghui Li, Guo Li, Zhe Zhou
Estimating the state of a dynamic system via noisy sensor measurement is a common problem in sensor methods and applications. Most state estimation methods assume that measurement noise and state perturbations can be modeled as random variables with known statistical properties. However in some practical applications, engineers can only get the range of noises, instead of the precise statistical distributions. Hence, in the framework of Dempster-Shafer (DS) evidence theory, a novel state estimatation method by fusing dependent evidence generated from state equation, observation equation and the actual observations of the system states considering bounded noises is presented...
April 21, 2017: Sensors
https://www.readbyqxmd.com/read/28430156/zero-sum-matrix-game-with-payoffs-of-dempster-shafer-belief-structures-and-its-applications-on-sensors
#2
Xinyang Deng, Wen Jiang, Jiandong Zhang
The zero-sum matrix game is one of the most classic game models, and it is widely used in many scientific and engineering fields. In the real world, due to the complexity of the decision-making environment, sometimes the payoffs received by players may be inexact or uncertain, which requires that the model of matrix games has the ability to represent and deal with imprecise payoffs. To meet such a requirement, this paper develops a zero-sum matrix game model with Dempster-Shafer belief structure payoffs, which effectively represents the ambiguity involved in payoffs of a game...
April 21, 2017: Sensors
https://www.readbyqxmd.com/read/28430155/dynamic-construction-scheme-for-virtualization-security-service-in-software-defined-networks
#3
Zhaowen Lin, Dan Tao, Zhenji Wang
For a Software Defined Network (SDN), security is an important factor affecting its large-scale deployment. The existing security solutions for SDN mainly focus on the controller itself, which has to handle all the security protection tasks by using the programmability of the network. This will undoubtedly involve a heavy burden for the controller. More devastatingly, once the controller itself is attacked, the entire network will be paralyzed. Motivated by this, this paper proposes a novel security protection architecture for SDN...
April 21, 2017: Sensors
https://www.readbyqxmd.com/read/28430153/a-novel-method-of-localization-for-moving-objects-with-an-alternating-magnetic-field
#4
Xiang Gao, Shenggang Yan, Bin Li
Magnetic detection technology has wide applications in the fields of geological exploration, biomedical treatment, wreck removal and localization of unexploded ordinance. A large number of methods have been developed to locate targets with static magnetic fields, however, the relation between the problem of localization of moving objectives with alternating magnetic fields and the localization with a static magnetic field is rarely studied. A novel method of target localization based on coherent demodulation was proposed in this paper...
April 21, 2017: Sensors
https://www.readbyqxmd.com/read/28430147/suitability-of-strain-gage-sensors-for-integration-into-smart-sport-equipment-a-golf-club-example
#5
Anton Umek, Yuan Zhang, Sašo Tomažič, Anton Kos
Wearable devices and smart sport equipment are being increasingly used in amateur and professional sports. Smart sport equipment employs various sensors for detecting its state and actions. The correct choice of the most appropriate sensor(s) is of paramount importance for efficient and successful operation of sport equipment. When integrated into the sport equipment, ideal sensors are unobstructive, and do not change the functionality of the equipment. The article focuses on experiments for identification and selection of sensors that are suitable for the integration into a golf club with the final goal of their use in real time biofeedback applications...
April 21, 2017: Sensors
https://www.readbyqxmd.com/read/28430146/a-new-method-for-single-epoch-ambiguity-resolution-with-indoor-pseudolite-positioning
#6
Xin Li, Peng Zhang, Jiming Guo, Jinling Wang, Weining Qiu
Ambiguity resolution (AR) is crucial for high-precision indoor pseudolite positioning. Due to the existing characteristics of the pseudolite positioning system, such as the geometry structure of the stationary pseudolite which is consistently invariant, the indoor signal is easy to interrupt and the first order linear truncation error cannot be ignored, and a new AR method based on the idea of the ambiguity function method (AFM) is proposed in this paper. The proposed method is a single-epoch and nonlinear method that is especially well-suited for indoor pseudolite positioning...
April 21, 2017: Sensors
https://www.readbyqxmd.com/read/28430132/celestial-object-imaging-model-and-parameter-optimization-for-an-optical-navigation-sensor-based-on-the-well-capacity-adjusting-scheme
#7
Hao Wang, Jie Jiang, Guangjun Zhang
The simultaneous extraction of optical navigation measurements from a target celestial body and star images is essential for autonomous optical navigation. Generally, a single optical navigation sensor cannot simultaneously image the target celestial body and stars well-exposed because their irradiance difference is generally large. Multi-sensor integration or complex image processing algorithms are commonly utilized to solve the said problem. This study analyzes and demonstrates the feasibility of simultaneously imaging the target celestial body and stars well-exposed within a single exposure through a single field of view (FOV) optical navigation sensor using the well capacity adjusting (WCA) scheme...
April 21, 2017: Sensors
https://www.readbyqxmd.com/read/28430127/image-guided-laparoscopic-surgical-tool-iglast-based-on-the-optical-frequency-domain-imaging-ofdi-to-prevent-bleeding
#8
Byung Jun Park, Seung Rag Lee, Hyun Jin Bang, Byung Yeon Kim, Jeong Hun Park, Dong Guk Kim, Sung Soo Park, Young Jae Won
We present an image-guided laparoscopic surgical tool (IGLaST) to prevent bleeding. By applying optical frequency domain imaging (OFDI) to a specially designed laparoscopic surgical tool, the inside of fatty tissue can be observed before a resection, and the presence and size of blood vessels can be recognized. The optical sensing module on the IGLaST head has a diameter of less than 390 µm and is moved back and forth by a linear servo actuator in the IGLaST body. We proved the feasibility of IGLaST by in vivo imaging inside the fatty tissue of a porcine model...
April 21, 2017: Sensors
https://www.readbyqxmd.com/read/28430126/accurate-ambient-noise-assessment-using-smartphones
#9
Willian Zamora, Carlos T Calafate, Juan-Carlos Cano, Pietro Manzoni
Nowadays, smartphones have become ubiquitous and one of the main communication resources for human beings. Their widespread adoption was due to the huge technological progress and to the development of multiple useful applications. Their characteristics have also experienced a substantial improvement as they now integrate multiple sensors able to convert the smartphone into a flexible and multi-purpose sensing unit. The combined use of multiple smartphones endowed with several types of sensors gives the possibility to monitor a certain area with fine spatial and temporal granularity, a procedure typically known as crowdsensing...
April 21, 2017: Sensors
https://www.readbyqxmd.com/read/28430121/synthesis-characterization-and-enhanced-sensing-properties-of-a-nio-zno-p-n-junctions-sensor-for-the-sf%C3%A2-decomposition-byproducts-so%C3%A2-so%C3%A2-f%C3%A2-and-sof%C3%A2
#10
Hongcheng Liu, Qu Zhou, Qingyan Zhang, Changxiang Hong, Lingna Xu, Lingfeng Jin, Weigen Chen
The detection of partial discharge and analysis of the composition and content of sulfur hexafluoride SF₆ gas components are important to evaluate the operating state and insulation level of gas-insulated switchgear (GIS) equipment. This paper reported a novel sensing material made of pure ZnO and NiO-decorated ZnO nanoflowers which were synthesized by a facile and environment friendly hydrothermal process for the detection of SF₆ decomposition byproducts. X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) were used to characterize the structural and morphological properties of the prepared gas-sensitive materials...
April 21, 2017: Sensors
https://www.readbyqxmd.com/read/28430120/autonomous-multi-robot-search-for-a-hazardous-source-in-a-turbulent-environment
#11
Branko Ristic, Daniel Angley, Bill Moran, Jennifer L Palmer
Finding the source of an accidental or deliberate release of a toxic substance into the atmosphere is of great importance for national security. The paper presents a search algorithm for turbulent environments which falls into the class of cognitive (infotaxi) algorithms. Bayesian estimation of the source parameter vector is carried out using the Rao-Blackwell dimension-reduction method, while the robots are controlled autonomously to move in a scalable formation. Estimation and control are carried out in a centralised replicated fusion architecture assuming all-to-all communication...
April 21, 2017: Sensors
https://www.readbyqxmd.com/read/28430119/influence-of-wind-speed-on-rgb-d-images-in-tree-plantations
#12
Dionisio Andújar, José Dorado, José María Bengochea-Guevara, Jesús Conesa-Muñoz, César Fernández-Quintanilla, Ángela Ribeiro
Weather conditions can affect sensors' readings when sampling outdoors. Although sensors are usually set up covering a wide range of conditions, their operational range must be established. In recent years, depth cameras have been shown as a promising tool for plant phenotyping and other related uses. However, the use of these devices is still challenged by prevailing field conditions. Although the influence of lighting conditions on the performance of these cameras has already been established, the effect of wind is still unknown...
April 21, 2017: Sensors
https://www.readbyqxmd.com/read/28425964/enhancing-the-responsivity-of-uncooled-infrared-detectors-using-plasmonics-for-high-performance-infrared-spectroscopy
#13
Amr Shebl Ahmed, Hye Jin Kim, Jinsik Kim, Kyo Seon Hwang, Seonghwan Kim
A lead zirconate titanate (PZT;Pb(Zr0.52Ti0.48)O₃) layer embedded infrared (IR) detector decorated with wavelength-selective plasmonic crystals has been investigated for high-performance non-dispersive infrared (NDIR) spectroscopy. A plasmonic IR detector with an enhanced IR absorption band has been designed based on numerical simulations, fabricated by conventional microfabrication techniques, and characterized with a broadly tunable quantum cascade laser. The enhanced responsivity of the plasmonic IR detector at specific wavelength band has improved the performance of NDIR spectroscopy and pushed the limit of detection (LOD) by an order of magnitude...
April 20, 2017: Sensors
https://www.readbyqxmd.com/read/28425963/a-multi-platform-optical-sensor-for-in-vivo-and-in-vitro-algae-classification
#14
Chee-Loon Ng, Qing-Qing Chen, Jia-Jing Chua, Harold F Hemond
Differentiation among major algal groups is important for the ecological and biogeochemical characterization of water bodies, and for practical management of water resources. It helps to discern the taxonomic groups that are beneficial to aquatic life from the organisms causing harmful algal blooms. An LED-induced fluorescence (LEDIF) instrument capable of fluorescence, absorbance, and scattering measurements; is used for in vivo and in vitro identification and quantification of four algal groups found in freshwater and marine environments...
April 20, 2017: Sensors
https://www.readbyqxmd.com/read/28425961/rapid-texture-optimization-of-three-dimensional-urban-model-based-on-oblique-images
#15
Weilong Zhang, Ming Li, Bingxuan Guo, Deren Li, Ge Guo
Seamless texture mapping is one of the key technologies for photorealistic 3D texture reconstruction. In this paper, a method of rapid texture optimization of 3D urban reconstruction based on oblique images is proposed aiming at the existence of texture fragments, seams, and inconsistency of color in urban 3D texture mapping based on low-altitude oblique images. First, we explore implementing radiation correction on the experimental images with a radiation procession algorithm. Then, an efficient occlusion detection algorithm based on OpenGL is proposed according to the mapping relation between the terrain triangular mesh surface and the images to implement the occlusion detection of the visible texture on the triangular facets as well as create a list of visible images...
April 20, 2017: Sensors
https://www.readbyqxmd.com/read/28425957/investigating-surface-and-near-surface-bushfire-fuel-attributes-a-comparison-between-visual-assessments-and-image-based-point-clouds
#16
Christine Spits, Luke Wallace, Karin Reinke
Visual assessment, following guides such as the Overall Fuel Hazard Assessment Guide (OFHAG), is a common approach for assessing the structure and hazard of varying bushfire fuel layers. Visual assessments can be vulnerable to imprecision due to subjectivity between assessors, while emerging techniques such as image-based point clouds can offer land managers potentially more repeatable descriptions of fuel structure. This study compared the variability of estimates of surface and near-surface fuel attributes generated by eight assessment teams using the OFHAG and Fuels3D, a smartphone method utilising image-based point clouds, within three assessment plots in an Australian lowland forest...
April 20, 2017: Sensors
https://www.readbyqxmd.com/read/28425955/homomorphic-filtering-for-improving-time-synchronization-in-wireless-networks
#17
José María Castillo-Secilla, José Manuel Palomares, Fernando León, Joaquín Olivares
Wireless sensor networks are used to sample the environment in a distributed way. Therefore, it is mandatory for all of the measurements to be tightly synchronized in order to guarantee that every sensor is sampling the environment at the exact same instant of time. The synchronization drift gets bigger in environments suffering from temperature variations. Thus, this work is focused on improving time synchronization under deployments with temperature variations. The working hypothesis demonstrated in this work is that the clock skew of two nodes (the ratio of the real frequencies of the oscillators) is composed of a multiplicative combination of two main components: the clock skew due to the variations between the cut of the crystal of each oscillator and the clock skew due to the different temperatures affecting the nodes...
April 20, 2017: Sensors
https://www.readbyqxmd.com/read/28425949/an-efficient-distributed-compressed-sensing-algorithm-for-decentralized-sensor-network
#18
Jing Liu, Kaiyu Huang, Guoxian Zhang
We consider the joint sparsity Model 1 (JSM-1) in a decentralized scenario, where a number of sensors are connected through a network and there is no fusion center. A novel algorithm, named distributed compact sensing matrix pursuit (DCSMP), is proposed to exploit the computational and communication capabilities of the sensor nodes. In contrast to the conventional distributed compressed sensing algorithms adopting a random sensing matrix, the proposed algorithm focuses on the deterministic sensing matrices built directly on the real acquisition systems...
April 20, 2017: Sensors
https://www.readbyqxmd.com/read/28425948/characterization-of-n-acyl-homoserine-lactones-in-vibrio-tasmaniensis-lgp32-by-a-biosensor-based-uhplc-hrms-ms-method
#19
Léa Girard, Élodie Blanchet, Laurent Intertaglia, Julia Baudart, Didier Stien, Marcelino Suzuki, Philippe Lebaron, Raphaël Lami
Since the discovery of quorum sensing (QS) in the 1970s, many studies have demonstrated that Vibrio species coordinate activities such as biofilm formation, virulence, pathogenesis, and bioluminescence, through a large group of molecules called N-acyl homoserine lactones (AHLs). However, despite the extensive knowledge on the involved molecules and the biological processes controlled by QS in a few selected Vibrio strains, less is known about the overall diversity of AHLs produced by a broader range of environmental strains...
April 20, 2017: Sensors
https://www.readbyqxmd.com/read/28425947/deep-count-fruit-counting-based-on-deep-simulated-learning
#20
Maryam Rahnemoonfar, Clay Sheppard
Recent years have witnessed significant advancement in computer vision research based on deep learning. Success of these tasks largely depends on the availability of a large amount of training samples. Labeling the training samples is an expensive process. In this paper, we present a simulated deep convolutional neural network for yield estimation. Knowing the exact number of fruits, flowers, and trees helps farmers to make better decisions on cultivation practices, plant disease prevention, and the size of harvest labor force...
April 20, 2017: Sensors
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