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Online since: May 2020
Authors: De Fu Li, Qi Fei Zheng, Qi Wang
They used an intermediate frequency induction furnace to melt the alloy, and each component was melted into an alloy, and then used air atomized and water cooled to obtain an alloy powder.
The main processes for preparing copper-steel bimetal composites by centrifugal casting are: pickling, caustic washing and water washing → preheating →hanging borax→ copper-based alloy melting, centrifugal casting → rapid cooling.
The liquid copper alloy is continuously cast on the stainless steel strip and immediately cooled to form a thin shell, which then enters between the two water-cooled rolls simultaneously with the steel strip, and the heat of the metal is continuously exported by the rolls.
The bimetal strip is cooled rapidly by the cooling chamber, and then cooled by water spray, and the oil stain on the surface of the steel strip is wiped off by a cleaning machine.
Materials Review, 2008, 22(3):40-43 [21] Foundry professional society of mechanical industry society.
Online since: March 2024
Authors: Michal Bačuvčík, Ivan Janotka, Lukáš Húlek, Jakub Gašpárek, Peter Paulík
For high-quality diagnostics, it is necessary to carry out a professional inspection of the structure, to study the related documentation, and based on initial findings to prepare a suitable scope and methodology of diagnostics before its actual implementation.
TSÚS performs the following tests on the taken concrete cylindrical cores according to the relevant test standards determining: · the density; · the compressive strength; · the strength in transverse tension; · the dynamic modulus of elasticity; · the secant modulus of elasticity; · the suction capacity; · the depth of penetration of water under pressure.
The mixtures with a very runny or dense consistency and with water separation were excluded from next experiment.
Two admixtures were used to eliminate cracking: modified cellulose ether for cement-based systems (0.6 % wt. of the cement) that retained water in the fresh PRC and thus reduced the crack propagation caused by drying the thin coat layer and the dry powder dispersion (1 % wt. substituting for the cement), thereby increasing the PRC´s adhesion to the base concrete and thus reducing the crack propagation.
Before the ACT, the base concrete was kept for seven days in 20 °C water and 21 days in 20 °C / 60 % R.H.- dry air.
Online since: May 2012
Authors: Rong Cheng Niu, Shu He Wei, Jie Zhan
China 2 College of Liaoning Professional Sanitation Technology, Shenyang 110101, P.R.
However, with the rapid economy development, many agricultural soils were contaminated by heavy metals as a result of industrial activities, over-fertilization and improper waste water irrigation.
Water makeup as tap water and fertilizer addition as (NH4)2SO4 during plant growth stages such as tilling, jointing and flowering were conducted according to local routine agricultural practices [2].
The pH was determined using a pH meter (PHS-3B), and the ratio of soil and water was 1: 2.5.
Online since: October 2016
Authors: Dong Yi Chen, Michael Lawo, Shi Ji Xia Hou, Yi Kang
However, because of the large number of sensors, the system is relatively large and expensive, and the preparation process is complex requiring professional support.
To analyze and judge the signal’s characteristics requires for SlimScarf a suitable signal recognition mechanism Signals acquired from experiment respectively are chewing signal (Chewing gum), liquid-food-swallowing signal (swallow water), solid-food-swallowing signal (swallow bread) and sound signal(read book).
Solid food may be accompanied by liquid such as water or saliva.
Table 1 Experiment requirements and conditions Target data Signal Source Conditions Voice Signal Reading Read 200 words slowly Chewing Signal Chewing Gum Chewing gum slowly and continuously Liquid Swallowing Signal Drinking water Drinking water slowly and time by time Solid Swallowing Signal Eating Bread Chewing bread and swallow it slowly.
Online since: October 2011
Authors: Yu Yang, Ya Qin Xu, Ze Yuan Yu, Sheng Xin Zhao
The anthocyanins are water-soluble pigments which facilitates their incorporation into numerous aqueous food systems.
The fruits were harvested at the fully mature stage, then were washed in running tap water and drained.
The prepared samples were incubated at 50°C in a water bath and treated by different extraction time(90–150 min).
As a result, extraction time (X1; min), ethanol concentration (X2; %, v/v ethanol/water) and solvent to solid ratio (X3; mL/g) were selected to be optimized for the extraction of blackcurrant anthocyanins and extraction yield (Y) was taken as the response of the design experiments.
Acknowledgements This work was financially supported by the Innovative Professional Project Foundation of Northeast Agricultural University (190205) and Scientific and Technological Research Project Foundation of Heilongjiang Provincial Education Department (11541017).
Online since: October 2014
Authors: František Kresta
These are always artificial aggregates produced within the ironmaking or steelmaking process, or in the production of nonferrous metals Such metallurgical by-products tend to be termed ‘slags’ not just by laymen but even by the professional public.
Granulated slag is blast furnace slag composed mainly of grains below 5 mm in size, with deep open pore, produced by rapid cooling of molten waste by quenching with pressure water; its use in roadbuilding is rare.
Free lime converts to portlandite Ca(OH)2 in the presence of water (Fig. 1).
The volume changes of water saturated samples tested at the temperature of 75°C amounted to 27.4% after 122 days for the samples compacted by 100% Proctor Standard energy, and 43.1% after 188 days for the sample compacted by Proctor Modified energy.
Fig. 3 Progression with time of the increment of vertical deformation of steelworks waste samples soaked with water at the temperature of 75°C High porosity and thus, high specific surface area of the materials increase their hydration activity.
Online since: December 2013
Authors: Khairur Rijal Jamaludin, Dzuraidah Abdul Wahab, Mohd Yazid Abu, Amiril Sahab Abdul Sani, Tajul Ariffin Abdullah
Communication failures in surgery are often underpinned by the inherent differences in professional practice across disciplines.
A high pressure water jet cleaner was used to remove any residual paint and to neutralize the carbon on the surface area of the cylinder head.
worker; Structure worker specialization 6 Less profit 7 Many rejected cylinder heads 4 196 294 Management Inadequate training or education Proper handling of dipping process; Awareness on Personal Protective Equipment 9 Understand the SOP; Report to supervisor weekly 2 Negligence on personal protective equipment; Exposed to hazardous condition 9 Improper handling of cleaning process; Not wearing any PPE 5 405 162 5 Management Not responsible on given schedule process Other facilities not transferring their engine parts after cleaning process 7 Supervisor on particular facility should monitor their worker performing task 5 Double cleaning; Misunderstood 6 Crankshaft, cam shaft, engine block scattered in cleaning area 5 210 210 Environment Waste management problem Paint removal; Carburizer and chemical waste flow directly into the ditch 6 Provide a waste filtration system; Neutralise chemical substances system is required 7 Flow clogged; Adverse effects to living being 8 Accumulated water
A single crane is used for transferring in all the processes: cylinder heads to the press valve machines, to the final cleaning machines, dipping into the decarburizer, cleaning with high pressure water jet cleaners, and bringing to Teijo C-2600 machines for removing grease and carbon powder.
This contamination can be easily monitored by observing the drain water accumulated with the generated waste from any of the released outlets.
Online since: May 2012
Authors: Shou Qi Yuan, Jian Ping Yuan, Jun Yang, Chuan Wang, Qiao Rui Si
First of all, it is to talk about submersible pump in which both of the media of the volute inside and outside are water.
Critical situation of total reflection exists in the water-volute plate interface.
(3) pi is incident sound pressure; pt is sound pressure of transmitted waves; f is the frequency of sound waves; D is volute thickness; Z is the impedance. ρ1 and ρ2 are density of water and volute plate respectively, ρ1 = 1000kg/m3, ρ2 = 7850kg/m3.
About onshore pumps: c1=1440 m/s, c2=6.0×103 m/s, c3=340 m/s,The sound intensity transmission coefficient tI changes into: (4) (5) (6) among them: f is the frequency of sound waves; ρ1, ρ2 and ρ3 are density of water, volute plate and air respectively that ρ1=1000kg/m3, ρ2=7850kg/m3, ρ3=1.293kg/m3.
Fig.7 Flowchart of acoustic simulation The flow field at five flow conditions was simulated by professional computing software ANSYS CFX, using finite volume method based on the finite element to discrete N-S equations.
Online since: October 2025
Authors: Lia Nicoleta Boțilă, Gabriela Victoria Mnerie, Branko Savić, Raluca Faur, Attila Akac
Aurel Păunescu Podeanu, Postal Code 307200, Timișoara, Romania 3Higher Education Technical School of Professional Studies in Novi Sad, Address: 1, Str.
How SFSP works and what makes it unique [2]: - Submersion Environment: In SFSP, the material and the rotating tool are submerged in water or another cooling medium.
Key Features of the OMA Maxiem 1530 Abrasive Waterjet Cutter: - Cutting Precision and Accuracy: The Maxiem 1530 uses a high-pressure jet of water mixed with abrasive particles (usually garnet) to cut through materials with high accuracy, producing clean edges with minimal finishing required
Images of chemical elements in the 3D printed specimen in layers powder (a) 13A-T, (b) 14A-T1 Conclusions Following the research conducted on the EN AW 5754 aluminium alloy through SFSP, experiments were carried out to evaluate the microstructure, mechanical strength, and structural integrity of the processed material, resulting in the following findings: Process temperature reduction: SFSP, conducted in a water medium, reduced the processing temperature, preventing excessive grain growth and thermal stress.
[7] Water jet cutting system OMAX MAXIEM 1530.
Online since: October 2025
Authors: Nopriadi Norpiadi, Ihsan Nur Hakim, Sentagi Sesotya Utami, Tri Lestari
Cavuoto, Barriers to the adoption of wearable sensors in the workplace: A survey of occupational safety and health professionals, Hum.
Waters, National occupational research agenda (NORA) future directions in occupational musculoskeletal disorder health research, Appl.
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