Novel Data Compression Algorithm for Transmission Line Condition Monitoring

For the problem of data accumulation caused by massive sensor data in transmission line condition monitoring system, this paper analyzes the type and amount of data in the transmission line sensor network, compares the compression algorithms of wireless sensor network data at home and abroad, and proposes an efficient lossless compression algorithm suitable for sensor data in transmission line linear heterogeneous networks. The algorithm combines the wavelet compression algorithm and the neighborhood index sequence algorithm. It displays a fast operation speed and requires a small amount of calculation. It is suitable for battery powered wireless sensor network nodes. By combining wavelet correlation analysis and neighborhood index sequence coding, the compression algorithm proposed in this paper can achieve a high compression rate, has strong robustness to packet loss, has high compression performance, and can help to reduce network load and the packet loss rate. Simulation results show that the proposed method achieves a high compression rate in the compression of the transmission line parameter dataset, is superior to the existing data compression algorithms, and is suitable for the compression and transmission of transmission line condition monitoring data.

Adults' Health-Related Problem Solving Is Facilitated by Number Lines, But Not Risk Ladders and Icon Arrays

Visual displays, such as icon arrays and risk ladders, are often used to communicate numerical health information. Number lines improve reasoning with rational numbers but are seldom used in health contexts. College students compared rates for information related to COVID-19 (e.g., number of deaths and number of cases) in one of four randomly-assigned conditions: icon arrays, risk ladders, number lines, or no accompanying visual display. As predicted, number lines facilitated performance on these problems – the number line condition outperformed the other visual display conditions, which did not perform any better than the no visual display condition. In addition, higher performance on the health-related math problems was associated with higher COVID-19 worry for oneself and others, higher perceptions of COVID-19 severity, and higher endorsement of intentions to engage in preventive health behaviors, even when controlling for baseline math skills. These findings have important implications for effectively presenting health statistics.

Thermal performance of exterior roof level amenity space in a cold climate - a quantitative guidance tool for landscape design

There are no known studies to quantify the effects of amenity space landscape structures located over habitable space as related to thermal performance. There are three main objectives for investigation in this MRP; Objective 1 – Thermal analysis of on-slab wall types, Objective 2 (O2) – Thermal analysis of example amenity space using results from O1, and Objective 3 (O3) – Recommended details that ‘work’ thermally and functionally. A quantitative methodology was utilized using 1D manual calculation (Glaser method) and 2D computer simulation (THERM) to study three CIP concrete wall conditions and variations which include; 1.0) base line condition, 2.0) modified condition, and 3.0) ultimate condition. Simulation results of O1 indicated that design of landscape walls could improve thermal performance by 55%, O2 found that there was an improvement of 60.5% between the worst and best performing conditions, and O3 recommended two wall variations to be utilized in landscape design which perform thermally and functionally. Keywords Thermal bridges, condominiums, MURBS, amenity space, landscape design, green roof, THERM

Thermal performance of exterior roof level amenity space in a cold climate - a quantitative guidance tool for landscape design

There are no known studies to quantify the effects of amenity space landscape structures located over habitable space as related to thermal performance. There are three main objectives for investigation in this MRP; Objective 1 – Thermal analysis of on-slab wall types, Objective 2 (O2) – Thermal analysis of example amenity space using results from O1, and Objective 3 (O3) – Recommended details that ‘work’ thermally and functionally. A quantitative methodology was utilized using 1D manual calculation (Glaser method) and 2D computer simulation (THERM) to study three CIP concrete wall conditions and variations which include; 1.0) base line condition, 2.0) modified condition, and 3.0) ultimate condition. Simulation results of O1 indicated that design of landscape walls could improve thermal performance by 55%, O2 found that there was an improvement of 60.5% between the worst and best performing conditions, and O3 recommended two wall variations to be utilized in landscape design which perform thermally and functionally. Keywords Thermal bridges, condominiums, MURBS, amenity space, landscape design, green roof, THERM

A method of data transmission technology for line condition monitoring in smart transmission grid

In order to make the operation of the line more safe and reliable, the state monitoring is needed and the remote transmission of data is realized on this basis. This paper proposes a variety of communication modes suitable for transmission line condition monitoring data transmission. The corresponding communication system design is given for different application conditions. The development and application of data transmission technology for condition monitoring of transmission lines are discussed in combination with two different schemes of typical design and distributed intelligent fault diagnosis system.

The Effect of Cornering on the Aerodynamics of a Multi-Element Wing in Ground Effect

This research investigates the effects of cornering on a multi-element wing in ground effect with the aim to improve the understanding of such in the effort to improve the performance of open-wheel race cars. A numerical validation study was performed to confirm the validity of the Detached Eddy Simulation CFD methodology used. This involved comparing numerical data with wind tunnel experimental data using a force balance and PIV for the velocity field to reveal the trajectory of the trailing vortex system. Once validated, the CFD was used to test the wing within a cornering condition as well as fixed yaw condition and its aerodynamic performance relative to the straight-line condition was analysed. Asymmetry was the general theme concerning the on-surface pressure distribution with this most prominent under the cornering condition. Ultimately, minimal change was observed regarding the downforce generated whilst drag was found to increase in the cornering condition and decrease slightly in the fixed yaw condition. Asymmetry was also observed in the wake of the wing where alterations to the relative strengths of the vortices was observed as well as their downstream paths which was generally governed by the direction of the freestream flow.