Results 91 to 100 of about 836 (213)

Research on Three-Dimensional Shape Curve Reconstruction Technology for a Scraper Conveyor on an Intelligent Working Face. [PDF]

Sensors (Basel), 2023
Qiao F, Fang X, Chen N, Liang M, Wu G, Zhang F.   +5 more
europepmc   +1 more source

The Patient, the Provider, and the TikTok Creator: Qualitative Analysis of the Content and Quality of Videos on Prenatal Genetic Screening

Journal of Midwifery &Women's Health, EarlyView.
Introduction Although providers may view the use of the noninvasive prenatal testing (NIPT) screen as an opportunity for patients to learn more about potential chromosomal variants of a fetus, research suggests that patients may view the genetic screening test primarily as an opportunity to learn about their fetus's sex chromosomes and may not ...
Erin P. Johnson, Naomi O. Riches, Stephanie Arceneaux, Emma Murdock, Caitlin Quade, Susanna R. Cohen, Robin E. Jensen   +6 more
wiley   +1 more source

A Big Coal Block Alarm Detection Method for Scraper Conveyor Based on YOLO-BS. [PDF]

Sensors (Basel), 2022
Wang Y, Guo W, Zhao S, Xue B, Zhang W, Xing Z.   +5 more
europepmc   +1 more source

Uninformative news, limited attention and institutional investors

Journal of Risk and Insurance, EarlyView.
Abstract Using the universe of transaction‐level data in the U.S. corporate bond market around uninformative downgrades, we find an abnormal increase in trading volume, abnormal bond returns, and a subsequent reversal. On the contrary, we do not find a reversal for abnormal bond returns associated with informative rating actions.
Maria Efthymiou, Pingyi Lou, Andreas Milidonis   +2 more
wiley   +1 more source

Modeling and simulation of longwall scraper conveyor considering operational faults

, 2016
The paper provides a description of analytical model of a longwall scraper conveyor, including its electrical, mechanical, measurement and control actuating systems, as well as presentation of its implementation in the form of computer simulator in the ...
Katunin Andrzej, Cenacewicz Krzysztof
core   +2 more sources

A Study on a Speed Regulation Method for Mining Scraper Conveyors and a Control Strategy for Permanent Magnet Drive Systems

Actuators
To address the mismatch between materials and operational speed in mine scraper conveyors under time-varying load conditions, this paper proposes a methodology for the regulation of speed based on the quantity of coal transported by the scraper conveyor.
Xi Zhang, Mingming Ren, Hongju Wang, Hongyu Xu, Bin Shi, Miaomiao Gao   +5 more
doaj   +1 more source

Intelligent Fault Diagnosis Method Based on VMD-Hilbert Spectrum and ShuffleNet-V2: Application to the Gears in a Mine Scraper Conveyor Gearbox. [PDF]

Sensors (Basel), 2023
Wang W, Guo S, Zhao S, Lu Z, Xing Z, Jing Z, Wei Z, Wang Y.   +7 more
europepmc   +1 more source

Scraper Face Conveyors Dynamic Load Control

Journal of Mining Institute, 2019
The task of controlling the dynamic loading of scraper face conveyors (SC) is considered and the unsatisfactory state of loading of mechanical and electrical components of the SC is recorded. The possibility of the appearance of a self-oscillatory nature of the entire system load due to the peculiarities of the movement of the traction chain along  the
openaire   +3 more sources

The Uneven Effect of Airbnb on the Housing Market: Evidence Across and Within Italian Cities

Journal of Regional Science, Volume 65, Issue 2, Page 339-377, March 2025.
ABSTRACT We investigate if Airbnb diffusion affects residential property values differently across and within cities leveraging the heterogeneity of five Italian cities in terms of tourist attractiveness, local housing markets, and socioeconomic conditions. We find that Airbnb density growth leads to increases in house prices in all cities. Within‐city,
Raffaele Congiu, Flavio Pino, Laura Rondi   +2 more
wiley   +1 more source

A Joint Positioning and Attitude Solving Method for Shearer and Scraper Conveyor under Complex Conditions [PDF]

, 2017
In a fully mechanized coal-mining face, the positioning and attitude of the shearer and scraper conveyor are inaccurate. To overcome this problem, a joint positioning and attitude solving method that considers the effect of an uneven floor is proposed ...
Zhaojian Yang, Jiacheng Xie, Xuewen Wang, Shuping Wang, Qing Zhang   +4 more
core   +1 more source