Search results

China is a large agricultural country and a great quantity of maize are produced every year, which is one of the China's three major varieties of grain production.
When the temperature is below 500 ˚C, with the increase of activation temperature, the activation reaction speed becomes faster, and then a large number of micropores are formed.
Table 3 Results of orthogonal experiments Number Activator concentration /％ Activation temperature /˚C Impregnation ratio Iodine value /mg·g-1 1 45 450 2.5:1 685.26 2 45 500 2.7:1 781.39 3 45 550 3:1 751.45 4 50 450 2.7:1 767.92 5 50 500 3:1 832.13 6 50 550 2.5:1 783.97 7 55 450 3:1 800.02 8 55 500 2.5:1 775.94 9 55 550 2.7:1 751.86 Table 4 Results of range analysis Level Activator concentration/％ Activation temperature /˚C Impregnation ratio K1 2 218.10 2 253.20 2 245.17 K2 2 384.02 2 389.47 2 301.17 K3 2 327.83 2 287.28 2 383.60 k1 739.37 751.07 748.39 k2 794.67 796.49 767.06 k3 775.94 762.43 794.53 R 55.31 45.42 46.14 In terms of the range analysis of test results listed in Table 4, it can be obtained that: the impact of activation temperature on the activation effect is the greatest, impregnation ratio takes the second place, and activator concentration the least; suitable parameters of activation process: activator concentration is 50%, activation temperature 500˚C, impregnation

In addition to that CuO material exhibits a number of favorable properties as low cost, nontoxic and easy formation.
Their properties are influenced by size, orientation of the crystallites and the grain boundary characteristics.
CuO and Si XRD results were matched by JCPDS reference card number (45-0937) and (27-1402) respectively.

The following is the descriptions of some major signals. clk is the clock signal that clocks all internal FFT engine components; reset_n is active low asynchronous reset signal; sink_eop is to indicate the end of the incoming FFT frame; sink_error is to indicate an error has occurred in an upstream module; sink_imag is imaginary input data, which represents a signed number of data precision bits; sink_ready is the signal asserted by the FFT engine when it can accept data; Sink_real is real input data, which represents a signed number of data precision bits; sink_sop is to indicate the start of the incoming FFT frame; Sink_valid is the signal asserted when data on the data bus is valid; Source_eop is the signal marks the end of the outgoing FFT frame; source_imag is imaginary output data; source_real is real output data; source_sop is the signal marks the start of the outgoing FFT frame. source_valid is the signal asserted by the FFT when there is valid data to output.
Rapidly Configurable Coarse-Grained FPGA Architecture for Digital Filtering Applications.

Area marked by frame with number 1 in Fig. 2 correspond with the composition of tungsten whiskers with small additions of Al, Cu and Fe.
Area marked by frame number 2 corresponds with the composition of ω-phase (Fig. 2, insert B), whereas chemical composition of area marked by frame 3 corresponds with β-phase.
Sozanska, Growth morphology of single-crystal grains obtained by directional crystallization of an Al-Cu-Fe alloy, Phil.

Great renewable wastes left after rice production have long been a concern for many researchers all over the world as the source of fibrous materials and a number of chemicals.
The main mineral component of rice production waste (husk, straw), as distinct from other grain crops, is amorphous silica.
IR-spectrum of amorphous silica from rice husk (numbers as per Table 1) Conclusion It was found out that from the black liquor produced from pulping of rice husk may be obtained amorphous silica dioxide of various quality.

Once you determine the size of the calculation model,a corresponding number of calculation grid is determined, In the program in order to reduce the error caused by meshing, length-width ratio of grid should not greater than 5, For the key research,the grid can be more intense.To sum up, in order to as far as possible consistent with the the geological condition at the same time, considering the modeling is convenient and reasonable.
The entire model from top to bottom in turn for sandy mudstone, fine sandstone, mudstone, coarse sandstone, mudstone, siltstone and fine sandstone, siltstone, sandstone, mudstone, fine sandstone, sandy mudstone, fine sandstone, sandy mudstone, fine-grained sandstone, mudstone, 1# coal, silty mudstone, fine sandstone, mudstone, sandy mudstone, sandstone, 2# coal, siltstone, silty mudstone, 3# coal, shale, siltstone, sandstone, fine sandstone and sandy mudstone, pedestrian roadway located in the 2# coal and sandstone layers.
Constitutive relation of rock and soil is defined by a number of experiments to test small amount of rock, soil elastic-plastic stress - strain curves, and then through the soil plasticity theory and the assumption with certain necessary supplementary conditions, and then promote the results of experiment to the complex stress and composite state to calculate the stress and strain of universal relations; The stress-strain relationship expressed in mathematical expressions, which is called constitutive relation of rock and soil.

Table 1 Experimental Formula Sample Number wt% D0 D1 D2 D3 Silica 5~3mm 8% 8% 8% 8% 3~1mm 30% 30% 30% 30% £ 1mm 50% 50% 50% 50% Nano SiO2 0 0.1% 0.2% 0.3% Silicon Powder 7% 7% 7% 7% Portland Cement 3% 3% 3% 3% Mineralizer 2% 2% 2% 2% Organic Fiber 0.1% 0.1% 0.1% 0.1% Fs10 0.3% 0.3% 0.3% 0.3% Results and Discussion Self-flow value.
With the further increased of nano SiO2 in the samples, the self-flow value decreased, a large number of air bubbles could not be excluded, resulting in the increase of the apparent porosity of the samples.
It is clear that the amount of Tridymite increased with addition of nano SiO2, but when the addition was 0.3wt%, the formation amount of Tridymite of the sample decreased to 30wt%.Because the small bubbles within the sample were too much that preventing the Tridymite grain growth.

Doug Hooton [2], the method involved preparation of thin sections of the concrete and point counting to obtain the number of unhydrated FA grains, then there are compared to a set of calibration standard sections.
The analytical results are examined by the application of a simultaneous equation mathematical approach to resolve the content of the individual components; this method has been successfully used by a number of UK laboratories and provides another possibility of resolving the composition of concrete, however, this method can only be used in situations where the chemical composition of original materials in concrete is known.

Sand Filling and Pouring Silica sand (SiO2) of grain fineness number (GFN) of 40 to 60 is used as mechanical support to the permeable mould [7].
Improper venting was due to the slurry coating thickness has increased when the number dipping process is repeated.

And the application of AWJ is based on the hypothesis such as time mean and special grain shape, their application is limited in studying the rule of gas-solid-liquid three-phase flow.
Re is the Reynolds number, CD is the drag coefficient, v r, s is the terminal velocity correlation for the solid phase.
In this model, 24 eDf C R= (5) where, f is the value of the drag function, C D is the drag coefficient, Re is the Reynolds number.� Model and Parameters Setting During the process of setting up the model inside and outside the abrasive water jet nozzle, the diameter of high pressure water inlet and abrasive inlet is initialized as 2mm, the diameter of three-phase flow outlet is set as 6mm, and the maximal diameter of mixing tube is 16mm., the exterior size of the nozzle is 50mm in diameter and 100mm in length.