Equipment control functions that were once hardwired are being implemented with software and very large scale integrated (VLSI) devices. Often this transition has resulted in increased flexibility, improved quality, and decreased costs. At the same time, it has created new concerns and challenges concerning worker safety. The visible and welldefined ladder diagram for relay-logic has been repla...

Purpose. Development of a methodology for assessing the occurrence sudden fractures in soil on example development seam d6 Karaganda coal basin. Methodology. Theoretical and experimental studies gas content seam, analysis technologies its development. Findings. Studies have shown that overworked massif with without breakthrough methane are same nature. A necessary condition formation (SFSS) min...

During the coal mining process, underground water is generated from longwall face. In meantime, cutting process would produce particles. Coal slurry in working site, especially for abundant mines. The treated to prevent pollution. Due extensively existing of suspended solid, traditional method often introduce new problems. this study, laboratory testing was conducted investigate characteristics...

Accurate and effective voice activity detection (VAD) is a fundamental step for robust speech or speaker recognition. In this study, we proposed a hierarchical framework approach for VAD and speech enhancement. The modified Wiener filter (MWF) approach is utilized for noise reduction in the speech enhancement block. For the feature selection and voting block, several discriminating features wer...

This paper introduces the topic of " Collaborative Distance " within Distributed Collaboration as being an introduction to this Special Issue on Collaborative Working Environments 1 (CWE). It starts in discussing various related concepts, identified during an extensive literature review, on both proximity and distance in distributed collaboration. Then, a Collaborative Distance Framework (CDF) ...

We propose a new approach to commutative watermarkingencryption (CWE). A permutation cipher is used to encrypt the multimedia data, which leaves the global statistics of the multimedia data intact. Therefore, any non-localized watermarking scheme that depends only on global statistics of the multimedia data can be combined with the permutation cipher to form a CWE scheme. We demonstrate this ap...

Longwall shearers operating in the underground mine workings move along longwall face conveyor troughs. The haulage system, which is made up of two kinematic pairs form track wheels installed shearer movers, cooperating with toothed route built conveyor’s throughs, responsible for moving shearer. currently used solutions shearers’ systems do not ensure proper cooperation segments, results failu...

Longwall backfill mining effectively mitigates the height of water-conductive fractured zone (HWCFZ), preventing it from reaching overlying aquifer and thus preserving groundwater. However, has disadvantages insufficient filling time space as well mutual constraints between mining. A novel continuous extraction partial (CEPB) water-preserving method was therefore proposed. The analytic hierarch...

Surface subsidence caused by underground coal mining has received wide attention due to its impact on the ecological environment. To obtain first-hand data subsidence, we arranged line measurement stations in area of Weiqiang coalfield and implemented surface movement observation at first working face obtained dynamic curve. The curves reflected initial, active declining stages each point a bas...