Search results

Fujian Province has built up 14 characteristics of agricultural production, such as grain, fruit, tea, vegetables, flowers, commercial timber, bamboo and bamboo shoots, mushroom, tobacco, herbs, poultry, aquatic products, seed breeding industry.
The total number of agro-products processing enterprises reached 7643 in 2011, which included 441 number of provincial level and 35 national key [4].
Fujian promotes clean production and forms a number of circular economy demonstration enterprises.
It has a number of provincial and municipal industry clusters.
Soft Science Plan Project of Fujian, Project Number: 2013R0087.

In order to reduce test number, homogeneous design dispose of the requirement of “orderliness comparable” , but test points shall be evenly distributed in the range of test.
But the number of sample obtained is much less at the same time, adverse effect may be occur to the training of neural network.
Largely exposed intrusive body of gneissic biotite granite () in Suliang period and less exposed Yanshan fine-grained potassium feldspar granite ( ) in early time.
With the limitation of calculation amount, the number of the sample is not too much, the analysis result is affected by this in some level.
If more level of each factor is selected and more calculation is made to increase the number of the sample, the degree of association of the calculation result would be improved.

A range-free, coarse-grained and simple localization algorithm has been vastly applied, i.e. centroid localization (CL) [5].
, (7) where, CMi denotes the degree of connectivity between Bi and M, and Nsent(i), the number of beacon information transmitted by Bi, and Nrecv(i), the number of beacon transmitted by Bi received at unknown node M.
Step3 When the number of beacon nodes received by M is equal the threshold N, M will establish three data sets as follow: Beacon_ID_set = {k1, k2,…, kN}; Coordination_set = {(X1, Y1), (X2, Y2),…, (XN, YN)}; RSSI_set = {R1, R2,…, RN}.
In first simulation, η was 4, and beacon node number varied from 10 up to 30 by step 2.
In second simulation, beacon node number was 20, and η varied from 2 up to 5.5 by step 0.5.

In addition, a number of key technologies were advanced that can be realized by the device, including recycling technologies, polymer ultra-fine filter technology, equipment and structural design, workflow design, etc.
Once, filter and washing equipment were vacuum suction filter cartridge, suction filter tank, etc. and because when filter cloth was as filter media, that penetrating filtering of fine powder was very serious, which led to loss of rare metals in large number; moreover, washing product had dead ends and effects was poor.
Currently, this technology won a number of national patents, at the same time has a project plan approval of SME Technology Innovation Fund of Ministry of Science and Technology with research fund of 0.6 million.
[6] Wenzhou Dong’ou Micropore Filtration Co., Ltd., Technology for fine-grain powder of preparation metal or non-metal’s filtration and washing: China, 200510056166.6 [P]. 2007-02-08

These nodules consisted of a number of sub-micro nodules which were resolved at higher magnification (Fig. 2).
The results indicated the presence of amorphous and some nano crystals with an approximate grain size of 3 to 5 nm before heat treatment which increased to 30 to 50 nm after heat treatment (HT) [ 68].
Previous qualitative observations indicated that finer grain sizes - on micro-scale - were obtained on steel surfaces in Ni-P deposits with increasing P content [69-70] or with adding W to the Ni-P deposit [49].
However, no quantitative measurements of the grain size were made.
However, no quantitative measurements of the grain size were given.

The aim of research is an exposure of features of electrochemical anodic behavior of pseudoalloy of WC-Co for development of effective method of his dissolution, receipt of tungsten oxides, and also electrosynthesis of tungsten powder with certain grain-size distribution.
The study of the morphology of tungsten powder samples allowed to determine the numerical grain sizes.
It was found that the main grain size is up to 20…30 μm (Fig. 6).
To increase the number of nuclei on a cathode surface followed by the formation of fine powders, the current density must be increased from 1.0 to 12.0 A∙cm-2.

On the other hand, the solidus temperature must not be overcome in order to avoid liquation of lowmelting constituents (eutectic, in particular) and grain boundary regions.
Moreover, it has to be considered that the Biot number concerning the problem of a massive cylinder cooled in water is large (simulating the extrusion heat treatment process) and does not allow for a lumped-capacity solution [18].
Elongated grains aligned along the extrusion direction (vertical direction in Figure 1a) are clearly visible in longitudinally sectioned samples together with stringers on Fe, Mn and Si rich intermetallics.
From transversal samples (Figure 1b), a transversal grain size ranging from about 50 to 100 m can be observed.

An example of a processed area on 5083 cast aluminum alloy (8mm thick) is shown in Fig. 5. 8mm Fig. 5 Macroscopic aspect of the FSP processed area – 5083 cast aluminum alloy In addition to an obvious finishing of the grains in the processed areas (which was more evident in the cast alloys), there were obtained: - significant improvement of the degree of local deformability in the processed area (e.g. up to 100% at the AlSi12 alloy); - increasing the hardness of the material in the processed area (up to: 40% in aluminum 6082, 30-45% in aluminum 7075, 65-80% in CuSn10 bronze, 20-40% in AISI 304 -X5 CrNi 18 10 stainless steel) compared to the base material; - improvement of tensile strength compared to the base material (e.g. up to 30% in CuSn10 bronze).
FSW welding in protective gas environment and FSW welding underwater are of great interest worldwide, as these welding methods are intended to solve a number of technical and technological issues related to the joining of metallic materials with characteristics and properties which require that the joining process is carried out under special conditions (protective gas environment), or which are exploited under certain working conditions (under water).
The use of the SFSW underwater welding method aims to obtain advantages over FSW welding: avoiding overheating of tools and of materials to be joined during the welding process, with the scope to obtain a finer grained structure and thus better mechanical properties, reducing the development of the intermetallic compounds, of the residual stresses and deformations at welding, as well as reducing of welding defects.
Conclusions · The extraordinary qualities of the friction stir welding process FSW, allowed the development of new processes, based on the FSW process principle; · FSP processing can be applied to metallic materials (e.g. aluminum alloys, copper, steel) in order to produce local modifications of the materials microstructure and to improve some mechanical characteristics in the processed area; · Severe plastic deformations and solidifications occurred due to the thermal cycle during FSP processing, could have as a result the formation of a fine and homogeneous microstructure of the processed area; · As a result of FSP processing, the finishing of grains in the processed area can be obtained, the deformability degree of the processed material, the hardness, respectively its mechanical properties can be obviously locally improved, compared to base metal (depending on the characteristics of the base material approached)

The temperature of a cell can be calculated by means of heat balance equation: T'=i=0nqi∙tCv(T)∙m, (7) where n is the number of neighboring cells; qi is the heat flux from the cell; t is the time step; CV(T) is the heat capacity of the cell; m is the mass of the layer; T is the temperature of the cell before the heat transfer; T′ is the temperature of the cell after the heat transfer.
The average grain size of the mode 1 plate is ~3.5 – 4 μm, which is 1.5 – 1.6 times higher than that in the other modes.
The temperature stabilization range is also lower and the final average grain size is ~2,2 – 3 μm [21].
Amirov, Determination of the Grain Size on the Basis of the Developed Mathematical Model of the Laminar Cooling System of the Strip of the Hot Rolling Mill “2000”, Proceedings of the TSU.

%Bi) appears to be a good candidate, due to its high atomic number, low melting point (125 °C), fast heat removal from the target, good neutron yield and low vapour pressure.
This oxide layer, constituted of small equiaxe grains, is thick (14 µm after 7800 hours immersion in Pb-Bi) and seems dense without any voids and cracks (fig 3).
Table.1 Summary of Fe-9Cr oxidation results in water, steam and Pb-Bi environment - Comparison between results of oxidation tests in Pb-Bi and in others environments Material Environment Temperature (°C) Kp cm 2/s Structure and nature scale Oxidation mechanism proposed references Fe-9Cr1Mo steam 450 1.64x10 -13 Duplex, hFe-Cr spinel≈hmagnetite Oxidizer diffuses by nano-channels Iron diffuses by grain boundary [15] Fe-9Cr steam 500 7.4x10 -13 Duplex, hFe-Cr spinel≈hmagnetite [6] Fe-9Cr1Mo steam 500 9.3x10 -14 Duplex, porous Fe-Cr spinel, compact magnetite Available space model [7] Fe-Cr water 450 ∼10-13 Duplex scale Oxidizer diffuses by nano-channels Iron diffuses by grain boundary [9] T91 Pb-Bi 470 2.5x10 -13 Duplex, hFe-Cr spinel≈hmagnetite Available space model This study In the case of Pb-Bi, according to the parabolic oxidation kinetics and to the comparison with the oxidation kinetics