In order to explore the influence of gradation and concentration on rheological parameters uncemented coal gangue-fly ash backfill (UCGFB) slurry, based fractal theory, particle size distribution mixture gangue fly under different mixing ratios are analyzed in this paper. On basis, UCGFB slurry studied a numerical simulation transportation is also carried out. The results show that (1) dimensio...

The research carried out by the authors of this paper is focused on technological process Inconel 625 welding with MAG–CMT (Metal Active Gas-Cold Metal Transfer) method. was welded to substrate material, which 16Mo3 steel. Both materials are used produce so-called bimetallic tubes, in practice serve as a part equipment intended for waste incineration. For reason, tubes must withstand extreme co...

OBJECTIVES A water pipe (hookah) is a tobacco smoking tool which is thought to be more harmless than a cigarette, and there are no adequate studies about its hazards to health. Water-pipe smoking is threatening health of the youth in the world today. The objective of this study has been to investigate the carbon monoxide (CO) levels in breath, examine the changes in pulmonary function tests (PF...

Sewer overflows may cause communities to be vulnerable to various health problems and other monetary losses. This puts a lot of burden on responsible to minimize end user complaints. Therefore, crack prediction would be helpful to facilitate decision makers to control sewer overflow problems and prioritize inspection and rehabilitation needs . The accurate prediction of current underground sewe...

Compacting orthogonal drawings is a challenging task. Usually algorithms try to compute drawings with small area or edge length while preserving the underlying orthogonal shape. We present a onedimensional compaction algorithm that alters the orthogonal shape of edges for better geometric results. An experimental evaluation shows that we were able to reduce the total edge length and the drawing...

A new structure is proposed for a DN25-type ultrasonic gas flow meter with V-shape double sound channel arrangement. The field characteristics are analyzed including velocity curves the four lines, profiles different cross-sections of meter, and streamlines transducer sections. metering flowmeter measured using Venturi nozzle device. When pipeline rate less than 2.26 m/s, pipe installation does...

An existing deteriorated or hydraulically undersized pipe can be replaced with a new pipe by static pipe bursting. Cavity expansion during pipe bursting induces ground movements, which may potentially damage nearby buried utilities if they are in close proximity to the pipe bursting operation. A large-scale pipe bursting experiment was performed in an 8 m long, 8 m wide, and 3 m deep test pit f...

Objectives: A water pipe (hookah) is a tobacco smoking tool which is thought to be more harmless than a cigarette, and there are no adequate studies about its hazards to health. Water-pipe smoking is threatening health of the youth in the world today. The objective of this study has been to investigate the carbon monoxide (CO) levels in breath, examine the changes in pulmonary function tests (P...

This paper discusses the calculation of bend minimal shapes for non-planar graphs with given topology. Based on the Simple-Kandinsky drawing standard – a simplification of the more complex Kandinsky standard – we show the disadvantage of using standard models for this task: We show that the minimal bend count is suboptimal, when these models are applied to non-planar graphs; it is therefore ben...