A Novel WSN-Oriented Locating Approach Based on Density

Zhang, T.; Zhang, D. G.; Liu, X. H.; Gong, Canfeng

doi:10.32604/iasc.2020.013919

Cited by 3 publications

(5 citation statements)

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“…The surface temperature under the action of a nanosecond laser pulse varies with time and processing depth and can be expressed as [22]:

\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr T\left(z,t\right)={T}_{0}+{{2AI}\over{K}}\sqrt{Dt}\times terfc\left({{z}\over{2\sqrt{Dt}}}\right),{\rm \ }t\le \tau \hfill\cr}}

\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr T\left( {z,t} \right) = \hfill\cr T_0 + {{2AI} \over k}\left[ {\begin{matrix} {\sqrt {Dt} \times terfc\left( {{z \over {2\sqrt {Dt} }}} \right) - } \\ {\sqrt {D\left( {t - \tau } \right)} \times terfc\left( {{z \over {2\sqrt {D\left( {t - \tau } \right)} }}} \right)} \\ \end{matrix} } \right],\;t \char62 \tau \hfill\cr}}

…”

Section: Resultsmentioning

confidence: 99%

Nanosecond laser micromachining of graphene nanoplatelets reinforced ZK60 matrix composites

Wu,

Li,

Zhang

et al. 2024

Materialwissenschaft Werkst

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In this paper, a nanosecond laser was used to etch the surface of graphene nanoplatelets reinforced ZK60 (GNPs/ZK60) matrix composites, and the effects of different scanning speeds, pulse repetition frequency and laser power on the etched morphology of the machined surface were investigated. The experimental results show that the etched groove width and heat affected zone width of GNPs/ZK60 composites are significantly increased compared with ZK60 material due to the influence of graphene, and the growth rate of the difference in heat affected zone width between GNPs/ZK60 composites and ZK60 materials is most significantly affected by the pulse repetition frequency. In addition, the dross height increases with the increase of laser power, while the scaly dross structure becomes increasingly clear.

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“…The surface temperature under the action of a nanosecond laser pulse varies with time and processing depth and can be expressed as [22]:

\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr T\left(z,t\right)={T}_{0}+{{2AI}\over{K}}\sqrt{Dt}\times terfc\left({{z}\over{2\sqrt{Dt}}}\right),{\rm \ }t\le \tau \hfill\cr}}

\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr T\left( {z,t} \right) = \hfill\cr T_0 + {{2AI} \over k}\left[ {\begin{matrix} {\sqrt {Dt} \times terfc\left( {{z \over {2\sqrt {Dt} }}} \right) - } \\ {\sqrt {D\left( {t - \tau } \right)} \times terfc\left( {{z \over {2\sqrt {D\left( {t - \tau } \right)} }}} \right)} \\ \end{matrix} } \right],\;t \char62 \tau \hfill\cr}}

…”

Section: Resultsmentioning

confidence: 99%

Nanosecond laser micromachining of graphene nanoplatelets reinforced ZK60 matrix composites

Wu,

Li,

Zhang

et al. 2024

Materialwissenschaft Werkst

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“…1d), which are well correlated with previous reports. [49][50][51] Interestingly, in ANT/GR, two broad peaks in the range of 398 eV to 402 eV were obtained, which were further deconvoluted into four peaks at 399.5 eV, 400.5 eV, 402.2 eV, and 402.8 eV, suggesting the presence of four types of N (as illustrated in Fig. 1b), pyridinic N, pyrolytic N, graphitic N, and N-N, respectively, but they were absent in bare GR, supporting the presence of nitrogencomprising ANT layers on the GR surface (Fig.…”

Section: †) Continuous Binding Ofmentioning

confidence: 99%

Metal-free platforms for molecular thin films as high-performance supercapacitors

Gupta,

Malik,

Kumari

et al. 2024

Chem. Sci.

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“…Equation ( 9) deals with m beacons and is expressed in a simple form as in equation (10). The user location can be obtained by applying the least square (LS) method to equation (10). ,…”

Section: Positioning Without Singularity Problemmentioning

confidence: 99%

“…Equation ( 19) can be obtained by a similar method used in equation (10), where u yz = ½yz T is the location of the node and ρ yz is a ðm − 1Þ × 1 measurement vector with…”

Section: Algorithm Application Stagementioning

confidence: 99%

“…In many cases, small-capacity sensor data is transmitted by multihop. Also, depending on the service, there may be cases in which a person directly installs sensor nodes in an appropriate location, such as healthcare, and an airplane sprays sensor nodes on the ground, such as a surveillance and reconnaissance sensor network [10]. When many sensor nodes are randomly distributed, the WSN is organized into a hierarchical network, and clustering is used to effectively manage the sensor nodes.…”

Section: Introductionmentioning

confidence: 99%

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3D Localization for Mobile Node in Wireless Sensor Network

Javed

Tang

Saleem

et al. 2022

Wireless Communications and Mobile Computing

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Wireless sensor network (WSN) is an emerging technology that can detect, collect, and transmit information in a specific unknown area in an unknown environment. It is currently playing an increasingly important role in the fields of national defense, medical and health, and daily life. WSN node location information is extremely important in many WSN applications. The data information collected by WSN is developed based on known node location information. The node location is one of the important issues in WSNs. Location information is very important for wireless sensors. A WSN without sensor node location information is meaningless because almost all WSN applications need to know node location information, such as animal populations, tracking research, early warning of building fires, management of goods in warehouses, and traffic monitoring systems. Several research works are underway to expand the 2D positioning algorithm in WSN to 3D regardless of the deployment structure of sensor nodes. This paper proposes an improved Savarese algorithm to the problem of singularity in WSN node localization. The proposed algorithm is a modified version of the conventional Savarese algorithm, and it solves the singularity problem and improved the positioning accuracy. Simulation results show that the proposed algorithm effectively improved system performance, and the accuracy is improved over 2.83% and 2.96% than the existing algorithms. The proposed scheme is effective for indoor environments while it can be deployed outdoor for small-scale.

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A Novel WSN-Oriented Locating Approach Based on Density

Cited by 3 publications

References 0 publications

Nanosecond laser micromachining of graphene nanoplatelets reinforced ZK60 matrix composites

Nanosecond laser micromachining of graphene nanoplatelets reinforced ZK60 matrix composites

Metal-free platforms for molecular thin films as high-performance supercapacitors

3D Localization for Mobile Node in Wireless Sensor Network

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