Search results

In order to approach a cyclic saturation level, number of cycles was established as 20.
(a) Dissipated energy as a function of number of cycles; (b) Cumulative residual strain as a function of number of cycles.
It can be seen in Fig. 3b that ԑr tends to accumulate in the extent that the number of cycles increases.
However, as the number of cycles increases a dislocation saturation level tends to be reached, so a roughly stable behavior can be seen after some cycles.
Eggeler, The influence of temperature on the evolution of functional properties during pseudoelastic cycling of ultra fine grained NiTi, Mater.

It is shown that it is possible to prevent loss of stability during the first operation of the technological process, as well as to reduce the number of operations by eliminating annealing between subsequent operations of drawing with thinning.
The work investigated the possibility of using an organofluorine coating to reduce the number of rejects in products made of refractory alloys.
Research Methods The main problem of the technology of manufacturing hollow axisymmetric parts from refractory alloys is the laboriousness of the process, due to the large number of drawing operations and the use of annealing (vacuum heat treatment) after them - for cold hardening removal.
The adsorption layer, lowering the surface energy of the material, facilitates plastic flow in the grains located in the surface layer.
However, in a number of cases, when processing fluorine-surfactant crystals with substances on the base, the effect of increasing the microhardness and strength of metals is observed [15-17].

Design of experiments is used to reduce the number of experiments and to analyse the results.
In a previous investigation [1], to ensure chemical compatibility and to limit the number of chemical elements, a WC-based hard material with a Fe-based binder was defined although cobalt is usually employed in cemented carbide [2].
Below 15 µm thickness (Fig. 2a), η-phase is always discontinuous and does not originate cracks; above 50 µm (Fig. 2c), η-phase forms a continuous layer with large pores; between 15 and 50 µm (Fig. 2b), the brittleness of the interface depends on connections between each grain.
Design of experiments (D.O.E) provides a simple and systematic approach to analyse the effect of these parameters on the densification of both layers and η-phase formation with a limited number of experiments.
D.O.E. by factorial designs requires minimal number of experiments and allows knowing effects of each parameter.

Group I consists of accession numbers 5 and 6 (Talaut Island) and accession numbers 7, 8, 13, 16 and 17 (South Minahasa Regency).
Group II consists of accessions numbered 1,2,3,4, 19, 20, and 21 (Tondano) and accession numbers 9, 10, 11, 12, 14, and 15 (Tomohon) and accession number 18 (South Minahasa).
Taro is high in carbohydrates, protein, minerals, vitamins, contains low starch grains and is easy to digest, so it is good for digestive health and safe for toddlers.
Accession numbers 9, 10, 11, 12, 14, and 15 taros from Tomohon, and accession number 18 from South Minahasa.
Whereas group II consist of accessions numbered 1,2,3,4, 19, 20, and 21 taro from Tondano, accession numbers 9, 10, 11, 12, 14, and 15 taro from Tomohon, and accession number 18 from South Minahasa.

Experiments were conducted indoor at five different Reynolds numbers (1447 ≤ Re ≤ 7237) and three different radiation intensities (430, 573, and 716 W/m2).
Furthermore, the heated air can directly be used for drying some farming product such as grain.
The corrugated channel gave higher Nusselt number than the straight channel and a higher channel height gave higher Nusselt number for the flow with the same Reynolds number [6].
The result of experimental study done in turbulent flow regime (Reynolds number of 5000 to 25,000) showed that multiple 60° V-baffle turbulator fitted on a channel provides the drastic increase in Nusselt number, friction factor, and the thermal enhancement factor values over the smooth wall channel [7].
The experiments were performed at five different air inlet velocities, i.e. 1.0 m/s, 2.0 m/s, 3.0 m/s, 4.0 m/s, and 5.0 m/s or at Reynolds number of 1447, 2895, 4342, 5790, and 7237, respectively.

The XRD results show that the addition of Nd3+ doping increases the number of SrNdFeO4 phases.
Whereas a new peak at 68.4965°, which matched with the ICDD number 01-072-0739, constitute the hexagonal crystalline system of SrFe12O19, which the dominant crystal phase as before.
XRD peaks at 32.7399°, 46.9959° and 62.6870° conform to tetragonal crystalline system of Sr3Fe2O6.64 (matched with the ICDD number 01-082-0427) with crystallographic parameters of a = b = 0.38704 nm, c=2.01763 nm, α = β = γ = 90°.
On the other hand, XRD peaks of 35.8377°, 49.6982°, and 58,4165°, which matched to ICDD number 01-076-1875, evidence a transform of the crystalline phase from hexagonal SrFe12O19 to tetragonal SrNdFeO4.
In SNF samples with higher Nd concentrations, the microstructure revealed the presence of strontium ferrite grains (dark colors) and also Nd-rich area (bright colors).

As the number of different types of materials has grown, so has their range of applications, many of which would not have been possible using clay-based products, since they require better or perhaps more specific properties.
Fine grained polycrystalline materials, produced by a controlled crystallisation of glasses, also called glass [5].
They can be defined as a group of inorganic non-metallic materials which are almost always crystalline and which have a number of industrial applications [7].
Silicon carbide is covalently bonded and exists in a number of forms with various stacking arrangements of the planes of atoms.
However, when using them for technical applications both designer and user are constrained by a number of limitations relating to reproducible quality, mechanical properties, predicting operational life, joining, non-destructive testing and approval, finishing and post-finishing [10].

Computer simulations, and different numerical methods have to play and can treat an imposing number of atoms, but conceptual understanding of how to reason from small to the large will play an equally important role.
ΘΘΘ (1) In general, depending on the number of gears we obtain a system n of differential equation of second order, which, in our algorithm is solved by the conventional method of Runge Kutta.
The precision of the prediction will be linked to the consideration of the maximum number of interactions.
The value of the factor Z is related to propagation of the plastic zone, deformation and orientation of grain in case of short cracks and stress intensity factors in case of long cracks.
By integrating the Eq. 13 we obtain the distribution of the crack size for a great number of cracks initiated at any possible moment between 0 and τ with density corresponding to fT (t).

New nodes join and root nodes fail handing New nodes join handing: The new node, its level number is 2 by default.
Broadcast request information, all nodes which received the message return a reply message which contains level number.
The cluster head of new join nodes is the first node which received 1 as level number.
The relationship between nodes time deviation and hops The figure showed that as the number of hops increased, the time deviation of nodes would increase and the time accuracy reduce.
Girod，and D.Estrin, Fine-Grained Network Time Synchronization using Reference Broadcasts.

Chinese scholars have carried out a number of studies on construction vibration effects on buildings and the environment [1,2], Such as: Zhu Weidong and others [1] through the testing and analysis on underground vibration characteristics caused by pile foundation construction, proposing underground particle vibration velocity measurement, calculation theory and evaluation methods, providing a basis for safety performance of the construction process affect on surrounding buildings; Xu Xichang and others[2] did some test on construction site in grain depot hammer vibration, combined with existing relevant norms at home and abroad, after a comprehensive analysis, given the value of the security threshold vibration 5mm/s, then assist in damping ditch excavation, construction of multiple pile spacing and other measures to control the vibration; Ma Dejiang [3] and others studied test methods for vibration effects of building pile foundation construction; Zeng Yongsheng [4] analyzed the mechanism
Table 1 Impact Bored vibration source parameters and site construction work profiles Vibration source Hammer weight /ton Max drop /m Pile hole diameter /mm Drilling test site The number one source (pile hole no.26 #) 7 4.3 2100 Test period begin at 2 meters underground, end up at 3 meters underground, the generally stroke is 2 meters, formation is given priority to with Qal+pl soil bastard.
The number two source (pile hole no.27 #) 5.5 3 1800 Test period begin at 11 meters underground, end up at 13 meters underground, the generally stroke is 2 meters, formation is given priority to with J2l mudstone.
The number tree source (pile hole no.24 #) 5.5 3 1800 Test period begin at 5 meters underground, end up at 2 meters underground, the generally stroke is 2 meters, formation is given priority to with J2l mudstone.
Table 2 Records the points table vibration parameters Station number horizontaldistance （m） Peak parameters Radial（Y） Section （X） Vertical（Z） Acceleration Speed Frequency Acceleration Speed Frequency Acceleration Speed Frequency cm/s2 cm/s Hz cm/s2 cm/s Hz cm/s2 cm/s Hz C1 6.5 26.1 0.19 67.0 48.7 0.34 67.1 166.1 1.13 18.8 C2 9.9 76.7 0.43 16.6 65.1 0.60 17.9 69.6 0.60 14.8 C3 24.7 41.5 0.17 59.6 48.6 0.15 76.4 10.9 0.04 17.1 C4 40.1 9.2 0.04 67.7 12.5 0.05 76.4 5.4 0.02 18.4 C5 88.2 3.9 0.01 35.1 6.1 0.02 61.2 2.2 0.01 25.2 C1 6.5 33.4 0.25 67.0 58.2 0.37 10.3 168.2 1.14 19.2 C2 9.9 66.5 0.41 16.5 69.1 0.68 17.7 76.8 0.71 14.6 C3 24.7 59.8 0.26 52.9 54.1 0.23 68.7 10.5 0.08 18.6 C4 40.1 12.2 0.07 10.7 15.7 0.05 14.5 6.1 0.02 14.5 C5 88.2 7.6 0.02 78.0 5.7 0.02 60.8 8.3 0.02 62.4 C1 6.5 28.4 0.22 66.9 49.9 0.32 23.5 123.2 0.92 19.4 C2 9.9 60.7 0.25 37.9 38.4 0.14 36.6 28.9 0.14 33.6 C3 24.7 42.0 0.17 57.5 48.4 0.18 75.3 11.6 0.05 75.9 C4 40.1 7.5 0.03 31.9 12.6 0.05 75.6 5.8 0.02 44.2