Search results

Synthesis of oil well cement fluid loss additive Using aqueous solution polymerization in atmospheric pressure with free radical polymerization, and the initiator types is oxidation-reduction initiator system.
The increase amount of initiator.Use K2S2O8—Na2SO3 oxidation reduction initiator system.
Comprehensive Performance Evaluation of slurry Temperature impact on the fluid loss performance of ZJK103.Dosage of ZJK103 is 1%,measured water loss at different temperatures, Observe the temperature impact on ZJK103 fluid loss additive, the experimental data are shown in Table 3-1.

The selection of calculation parameters combined with the geological exploration data and laboratory test results in this paper.
The settlement of the filling body decreases gradually with the reduction of the height of the filled soil.
The settlement of the filling body decreases gradually with the reduction of the height of the filled soil.

The mean particle size reduction in gaseous nitrogen was significantly more than that in liquid hexane.
Despite the fact that majority of the data in the literature indicate that NS materials have higher hardness than corresponding conventional materials, there are several studies pointing out that this hardness increase is not as high as that predicted by the classical Hall-Petch equation [9]. 3.3.3.
A significant reduction in the mean particle and crystallite size with increase in milling time was observed. 2.

For this purpose test data beyond the boundary conditions of the validated ranges is crucial for further improvements of the model.
A reduction of the soil initial stiffness K10 from 88000 to 5000 N/mm results in a reduction of the maximum impact force from about 8000 kN to 4337 kN with an impact duration of 39.7 ms

Diseases, such as epidemic disease, virus disease, bacterial wilt and damping off, can directly cause the reduction of hot pepper output, and its root cause is not only related to physical and chemical properties of soil[6], but also close with the species and quantity of rhizosphere microorganisms, which is one of the prime reasons for successive cropping obstacle.
After a fixed time of incubation, culture plates were taken out and used to calculate the mean number of bacterial colonies in three plates with the same dilution according to the following formula: CFU/ml=the mean number of bacterial colonies in three plates with the same dilution×dilution ratio×5 Data processing method.The mean square and standard deviation of every measured index were respectively calculated by DPS, and the significance of differences among fluid fertilizer treatments and the comparisons were tested by one-way ANOVA.
As a result, the proper application of fertilizer may perfect the microorganism proportion in the soil and improve the antagonistic effect of useful microorganisms on pathogenic bacteria, which is of significance to the promotion of the greenhouse production, the reduction of cost and the increase of the greenhouse vegetable yield and quality.

It was found that the 2-methylimidazole nitration using a mixture of highly concentrated acids at temperatures lower than 50 oC resulted in significant reduction in the product yield.
However, subsequent increase in the reaction mixture temperature leads to reduction of the product yield due to side oxidative ring opening reactions.
The synthesized compounds have been characterized by spectral analysis data.

Generally speaking, the surface of mesh after facet reduction is not smooth, unevenness will appear, and hence the further smooth processing is needed.
Laplace surface smooth processing can effectively eliminate the data distortion caused by the facet reduction, and draw the surface more actually and naturally.

Mechanical and physical properties of vermiculite-concretes №№ of compositions Cement: vermiculite by volume Cinder additive Mass specific gravity ρ, (kg/m3) Limit of the ultimate strength 28 days, (MPa) Compression breaking strength Bending strength 1 2 3 4 5 6 1 1:2 – 937 11.0 3.4 2 1:2 + 930 9.4 3.1 3 1:3 – 746 6.5 2.7 4 1:3 + 762 5.9 2.5 5 1:4 – 643 3.4 1.6 6 1:4 + 625 3.1 1.4 (Tab. 1) shows that up to 30% of portland cement can be replaced with volcanic cinder without significant reduction in the strength of the fireproof concrete.
The matrix of the experiment № Natural variables Matrix of the experiment 1 0.30 1444 -1 0 +1 0 0 2 0.9 1444 +1 0 -1 0 0 3 0.75 2221 +0.5 +0.87 +0.25 +0.75 +0.43 4 0.75 667 +0.5 -0.87 +0.25 +0.75 -0.43 5 0.45 2221 -0.5 +0.87 +0.25 +0.75 -0.43 6 0.45 667 -0.5 -0.87 +0.25 +0.75 +0.43 7 0.6 1444 0 0 0 0 0 After processing the experimental data, the following regression equations in coded form were obtained: By regression equations were constructed response surface.
A further increase of the percentage of reinforcement leads to the reduction in strength, because of the destruction of the structure of fiber-vermiculite-concrete composites.

Using the experimental data shown in Figure 3, we plotted the saturation and residual magnetizations against annealing temperature for the Cu–Ni–Co alloy.
Comparing Figures 2 and 4, we also found that the critical temperature in the reduction of magnetic properties coincides with that of the microstructural change from cubic to octahedral.
A more rapid reduction is seen in the range of 973 K to 1023 K.

In combination with the historical load, the data of historical electricity price and the on-grid electricity price present by generation side, the retail price is formulated by electricity suppliers based on the target of self-interest maximization, and the objective function is: (5) Ro is the income of supply side, Po, Qo and Qs represent the vector of 24-hour retail price, the electricity consumption of electric power users and the charging and discharging control strategy of BESS, respectively.
Seen from the perspective of electric power users, the incorporation of BESS is beneficial, resulting in the reduction of average electricity price but not the satisfaction of users.
The integration of BESS smooth the load curve of power generation and supply, and the cost of power generation and supply is reduced, which result in the reduction of electricity price on generation and supply sides.