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It was established that inverter power supplies (as they reduce peak loading) provide better quality of welds (more stable process, lower amount of spatter) and this reduces the fabrication cost due to the reduction of deseaming operations, lower welding material consumption as well as improving the service reliability of the welding constructions.
Analysis of the experimental data allowed describing the obtained dependence (within the welding current range 80-120 A) by the following mathematical equation: Y = аI2 + bI + c, (4) where a, b, c - empirical coefficients (presented in Table 1) Table 1 Empirical coefficients of the equation (1) Make the electrode Diode rectifier Inverter a b c a b c LB-52U 0.0007 –0.115 8.86 0.003 –0.677 30.67 Stability of the welding process also influences the distribution of microhardness in the various areas of weld joints.
Summary The results of the study demonstrate that inverter power supplies provide high quality of welding (more stable process, lower spatter amount) and this reduces the production cost of the product due to reduction of deseaming operations, economizing on the welding material.
Sokolov, The methods of spatter reduction when welding in СО2, Engineering technology, 5 (2005) 24 – 30
Sapozhkov, Spatter when manual arc welding with coated electrodes and ways of its reduction, Welding production, 12 (2007) 28–31

A single pit on slender compression element can cause a significant reduction in the buckling capacity of the member.
For modeling the pinned ends boundary conditions of the tubular member, the end portions of the member were represented by a dome with relatively larger thickness and elastic modulus data to Table 1 Typical diagonal element of jacket platform* L [m] OD [mm] ID [mm] t [mm] A [mm2] L/r D/t 19 457 419 19 26222 126 24 * L = length, OD = outer diameter, ID = inner diameter, t = thickness, A = cross-sectional area, r = radius of gyration eliminate deformation effects at those portions.
For modeling the pinned ends boundary conditions of the tubular member, the end portions of the member were represented by a dome with relatively larger thickness and elastic modulus data.
The reduction was ranging from 3% to 10% depending on the hole positions. 3.
The maximum reduction occurred when the hole position was in the middle of the member length. 4.

For CrNiMo steel, a wear reduction of as high as 160 times was obtained besides a significant reduction of the coefficient of friction.
Fig.2 shows the data on atomic concentration of the sample of H13 treated at the same condition as above, for the 9h case.
We can see that the concentration of nitrogen is about 50% lower at the surface compared to the GDOS data, but it is still quite high even at 1.2µm.
The reduction of wear was about 1/3 for the treated sample.
Fig.4(a) Wear track profile of untreated H13 sample Fig.4(b) Wear track profile of the PIII treated Sample (6h, 380°C) The measured profiles of wear track showed a reduction in wear of about 8 times and 160 times for CrCoMo and CrNiMo, respectively.

The cone data reported here are obtained by burning samples in the horizontal position with an exposed surface of 100×100 mm2 and are the average of two or three replicated samples.
The peak heat release rate is reproducible to within ±10% and the time to ignition data is reproducible to within ±15% [6].
This reduction in the degradation temperature was not expected because Mg(OH)2 is thermally stable up to 330-340ºC [7], and will be explored by further experiments.
Comparing all the nanocomposites with pure epoxy resin, it is possible to see that there are important reductions in HRR for the whole amounts of nano-Mg(OH)2 used.
The reductions in PHRR were about 33% for 10% nano-Mg(OH)2, 22% for 5% nano-Mg(OH)2 and 23% for 1% nano-Mg(OH)2.

Noise reduction coefficient (NRC) was computed to compare the performance of the palm date fiber samples for the different densities.
In this research the experiment was conducted using two impedance tubes of 28 mm and 100 mm diameters, noise generator, two channel data acquisition system 01 dB, two ¼ in microphones type GRAS-40BP in each tube, software package SCS8100.
Noise reduction coefficient (NRC) was computed to compare the performance of the palm date fiber samples for the date palm fiber panel of different densities.
Table 1 shows the data for the noise reduction coefficient for the samples.
Noise reduction coefficient was computed to compare the performance of the palm date fiber samples for the date palm fiber panel of different densities.

One of the possible ways of iron mineral formation is an extracellular reduction of amorphous Fe (III) oxides and hydroxides by dissimilatory iron-reducing bacteria.
The investigations of biogeochemical transformations accompanying microbial iron reductions have been increasing in last years [1-3].
According to the X-ray diffraction data, the initial SF is an X-ray amorphous material.
The data were obtained with applied field of 5 kOe and 10 kOe for N1 and N9 respectively.
The reductions process lead to an appearance of Fe2+ atoms in B-positions.

Based on the extensive collection, the full analysis of existing survey data and survey results, there are many factors beyond our control.
The mainly water environment issues in Feng Zi Jian water environment branch system are: the destruction depth of the groundwater recharge, runoff, drainage system, reduction of surface water, surface water pollution, reduction of groundwater reserves, decline of groundwater level, groundwater pollution and so on.
According to the relative importance, it gives criterion layer the corresponding weights [6]. 1.Water environmental problem: (1).Select the reduction of surface water, destruction depth of the groundwater recharge, runoff, drainage system, groundwater pollution, reduction of groundwater reserves, surface water pollution as the water environment evaluation factors in valley, and construct the judgment matrix A1
(2).Select destruction depth of the groundwater recharge, runoff, drainage system, reduction of groundwater reserves, reduction of surface water,groundwater pollution, as the water environment evaluation factors in steep (cliffs), and construct the judgment matrix A2
Conclusion Based on the task 《the assessment of Coal Spontaneous Combustion influence on terrain in Shanxi province》,with AHP, combining with remote sensing interpretation technology, According to the collection of existing data in exploration area and the validation of the actual field data, make evaluation on the quality of water environment in Feng Zi Jian mining , and the evaluation can respect the actual situation of local water environmental quality , get the best evaluation results.

In addition to basic characterization, aluminium thus processed is studied in terms of fracture toughness, in order to obtain data relevant to crashworthiness that can be readily compared with alternative materials.
These advantages have resulted in Aluminium sheet already finding its way into weight reduction for automotive applications.
Weight reduction in structural or crash resistant applications requires the use of high-strength aluminium alloys: 6000 and 7000 series can reach strength/density ratios more favorable than that of steel, with a weight reduction potential of up to 20-30 % [2].
The specific essential work of fracture was determined from extrapolation of wf vs l0 data to zero ligament length (Fig. 2 right).
The good linear fitting of the wf vs l0 data (R2=0.93) confirms the reliability of the measured we and validates the applicability of the EWF method to assess the plane stress fracture toughness of thin 6061-T6 aluminium sheets.

Turn on power supply of the laser device and the measuring system, and record measured data of the instrument.
Start calculating the measuring result 5 minutes after turning on the instrument, and save measured data every 30 seconds.
-0.1345 -0.1345 111-120 -0.1345 -0.1345 -0.1345 -0.1345 -0.1345 -0.1345 -0.1345 -0.1345 -0.1345 -0.1345 From Table 2, we can see that the system data becomes stable after 84 times.
Please refer to Table 3 for experimental result. 12:00 pm 10:00 pm (measure the system raising by 0.04mm) N result N result 1-5 0.0945-0.0872-0.1107-0.1000.102327 1-5 0.1013-0.0999-0.1013-0.1012-0.0949 6-10 0.0975-0.1008-0.1012-0.1015-0.0989 6-10 0.0956-0.1075-0.1009-0.0981-0.1041 Table 3 Repeatability experiment data Unit (mm) From the experimental data, we can see that there is slight difference as to standard deviation of repeatability experiment data in the daytime and at night.
Make real-time recording of the accumulated height difference for each measurement by system software, save the measured data, and display the accumulated height difference curve on the user interface.

The former model, by treating magnitude of grain-scaled stresses as a fitting parameter, provides better correspondence to experimental data.
In the present work the model predictions are compared with the experimental data obtained on pearlitic steel wires [6].
The results of calculations together with experimental data for four reflections are presented in Fig. 3.
Experimental ε211 vs. sin 2ψ data [6] for specimen with dia. 0.12 mm (circles) and model predictions: thin line - full-constraint model [5], thick line - full-constraint after reduction, dashed line - simplified model [3].
Nevertheless, the difference between the predicted grain-scaled stress and the one which provides agreement with experiment data is even larger.