Search

In situations when the precise position of a machine is unknown, localization becomes crucial. This research focuses on improving the position prediction accuracy over long-range (LoRa) network using an optimized machine learning-based technique. In order to increase the prediction accuracy of the reference point position on the data collected using the fingerprinting method over LoRa technology, this study proposed an optimized machine learning (ML) based algorithm. Received signal strength indicator (RSSI) data from the sensors at different positions was first gathered via an experiment through the LoRa network in a multistory round layout building. The noise factor is also taken into account, and the signal-to-noise ratio (SNR) value is recorded for every RSSI measurement. This study concludes the examination of reference point accuracy with the modified KNN method (MKNN). MKNN was created to more precisely anticipate the position of the reference point. The findings showed that MKNN outperformed other algorithms in terms of accuracy and complexity. [ABSTRACT FROM AUTHOR]

High-density brines have been recognized beneficial for oilfield applications, with various key areas such as drilling, completion and formation evaluation. High-density brines can play a critical role in the development and production of oil and gas reservoirs during the primary, secondary, and tertiary recovery phases. High-density brines can enhance the mobility and recovery of the oil in the reservoir by controlling the density and viscosity. However, a less attention has been given to the application of highdensity brine in the area of reservoir development. This review is shedding light on a concise overview of reservoir development stages in association with the recovery mechanisms. In addition, most possible applications of high-density fluids have also been reviewed in the field of the reservoir development. In summary, this review state that high-density brines can be used to stimulate reservoirs by hydraulic fracturing during the primary recovery phase. However, the risk of increased interfacial tension, which relies on the density difference of two fluids, can trap more residual oil relative to conventional water flooding. In addition, high-density brines are effective in decreasing the mobility ratio and facilitating favorable displacement during polymer flooding. However, they can be least effective in alkaline flooding due to the high IFT related to large density differences. Thus, it is suggested to consider the utilization of sustainable high-density brines by taking into account effective factors in petroleum engineering aspects such as stimulation, secondary recovery and polymer flooding. [ABSTRACT FROM AUTHOR]

Stock markets augment industries by raising and circulating capital in the economic system. This article examines the relationship between economic policy uncertainty (EPU) shocks and stock market development (SMD) in China. To this end, we utilize a novel EPU index the Nonlinear Autoregressive Distributed Lag (NARDL), and the Breitung-Candelon spectral causality approaches. The empirical outcomes suggest that positive (negative) shocks of EPU significantly decrease (increase) China's SMD. The spectral causality approach confirms the lead-lag relationships among EPU shocks, stock market liquidity, banking sector development, savings, and trade openness. To propel the size of China's stock market, the concerned authorities should strive to appease high EPU and ensure stability in macroeconomic and financial dynamics. JEL Classification: G11, G12, G15. [ABSTRACT FROM AUTHOR]

Purpose: This study aims to examine the extent to which change for the good and beautiful could be considered a description fit for explanation to measure all that is novel in this issue. Methodology: The researcher relies on the comparative inductive, analytical and critical methodology to accomplish the objectives of the study and answer its problem. Findings: The study reaches several conclusions, the most important of which: that adornment and beautification are habits and social transactions, in which meanings, explanation and measurement are turned to. There is nothing that refers to that issue explicitly or implicitly in the explanation of "changing God's creation". Neither is there any consensus. This is not fit also to be a reason on which Fiqhi opinion of aesthetic cosmetic operations could be based. It is then necessary to search for another reason suitable for building the opinion on. Originality: This study is characterized by its handling of the issue of reasoning by using the description of “changing God's creation” from a fundamental perspective. The study also tests this description and looks in to it where the modes of reasoning is concerned to determine the extent to which it could be considered as a reason in the first place, before studying its controls and defining its meaning.