The key techniques in indoor positioning based on visible light communication and the state of art this research were surveyed. First, significance from two aspects limitations current technology advantages was discussed; And then, main four summarized triangulation RSS method principle image introduced detail; Next, performance characteristics various typical algorithms compared analyzed; In end, several suggestions future given.

The adoption of mobile energy equipment to replenish the in wireless sensor networks is gaining increasing attention. However, pioneering work on charging neglects location and time-varied feature node, leading a high frequency long path. In this work, we aim reduce improve its efficiency. temporal-spatial combined strategy (TSCCS) developed, which can guarantee that network runs for time. First, an aware K-means (ELAK-means) clustering algorithm proposed group nodes into clusters construct...

The limited battery capacity of sensor nodes restricts the widespread application wireless networks (WSNs). Wireless power transfer enables prompt recharging in WSNs, which are called rechargeable (WRSNs). However, mainly due to underestimating combined influence spatial and residual energy constraints by charging requests, traditional scheduling strategies for on-demand WRSNs achieve low throughput or success rate, posing a major bottleneck further improvements. In this paper, an instant...

With the deepening of concept sustainable development, wind power as a renewable energy has been rapid developed. The simulation generation system in analysis, analysis and grid both played very important role. In this paper, by using MATLAB software, electronic mathematical model related to speed, wheel, driving mechanism, generator, is established research carried out, which are used for results. This paper introduces control technology turbine, mainly about variable pitch generator speed...

Abstract We study a twisted generalization of Lie superalgebras, called Hom-Lie superalgebras. It is obtained by twisting the graded Jacobi identity an even linear map. give complete classification complex multiplicative superalgebras low dimensions.

A current-mode general nth-order filter configuration using current mirrors is proposed in the paper. The uses n basic and unloss integrators, can realize low pass, high band reject all pass filtering responses by changing input signal forms. As a design example, fourth-order related CMOS circuit presented. computer simulation of transistor carried out PSPICE results show that valid. has several advantages, such as voltage, power dissipation, wide frequency very sensitivities, which will...

With the development of smart grid, substation assumes an increasingly important role. Compared with deficiency traditional substation, concept key technical characteristics relay protection and three typical configuration types are described in this paper. The techniques were developed that is inevitable trend for future power grids development.

In the Visible Light Communication (VLC) system, LED light source has dual functions of lighting and communication. Different layouts will inevitably lead to different power distributions in room. Therefore, layout must be reasonably designed make received optical tends uniform. This paper establishes a direct link transmission model for indoor visible Under optimal number LEDs this model, relationship between design distribution is analyzed simulated, which provides an solution layout. more...

A new mixed mode filter based on MDDCC (Modify Differential Difference Current Conveyor) is proposed, the structure of simple, circuit consist only three active MDDCCs, five resistors and grounded capacitors. The can realize current voltage mode, which function low pass biquad, band biquad high simultaneously. computer simulation PSPICE uses 0.18μm TSMC CMOS theoretical results are validated proposed circuit.

In marine environments, the durability of reinforced concrete structures such as bridges, which suffer from coupled effects corrosion and fatigue damage, is significantly reduced. Fatigue loading can result in severe deterioration bonds between reinforcing steel bars surrounding concrete, particularly when are corroded. Uniaxial tension testing was conducted under static conditions to investigate bonding characteristics corroded concrete. An electrolyte technique used accelerate corrosion....

The purity of output spectrum high power microwave vacuum electronic devices is very important for the system. stray outputs with frequency in or near operating band have been observed some Multi-Beam Klystron (MBK). exits serious influence on normal operation systems. variation different an S MBK was described, and reasons generating were analyzed by using 1D klystron code this paper. reflecting electrons secondary caused interception electron beam gap head cavity are responsible outputs....

This paper constructs a series of modules from modular Lie superalgebras<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M4"><mml:mi>W</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>0</mml:mn><mml:mrow><mml:mo>∣</mml:mo></mml:mrow><mml:mi>n</mml:mi><mml:mo stretchy="false">)</mml:mo></mml:math>,<mml:math id="M5"><mml:mi>S</mml:mi><mml:mo stretchy="false">)</mml:mo></mml:math>, and<mml:math id="M6"><mml:mi>K</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mi>n</mml:mi><mml:mo...

Abstract The sensor placement is an important research issue for monitoring water distribution networks (WDN). Due to the natural graphical structure of WDN, it advantageous use graph sampling theory selecting nodes in WDN. But existing only applied processing band-limited signal, and pressure data WDN a non-band-limited signal. This paper devoted solving this problem. proposes approximate conversion method from signal gives optimal spectrum threshold formula. formula perform spectral...