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But, laser generated Lamb waves had wide frequency bandwidth, low directivity, and low sensitivity, so that there has been great efforts to improve these properties.
Table 1 summarizes the design parameters and performance factors.
Slit design parameters and performance factors Fig. 4 shows the simulation results for focusing strength when the slit parameter is individually changed, where other slit parameters are fixed to the standard value shown in Table 1.
Simulations for other performance factors also have been carried out, however the results are not shown in this paper due to the limit of space.
Takemoto, "Non-contact estimation of thickness and elastic properties of matallinc foils by the wavelet transform of laser-generated lamb waves" NDT&E International, Vol. 32 (1999), p 21-27

Briggles [3-4] constructed an indicator of a new life cycle support standard with five factors: supply of raw materials (logistics), design, construction and the production process in perspective of data information.
Time span of life cycle of ship Ship has a certain time span from market demand to dismantling , the factors affected the span are : the transport distance of raw materials supply ,and time must stay - molded from raw materials to the hull until the trial.And therefore ship irregular trajectories resulted from uncertainty of subjective decision makers was not analysed,to identified time span with a comprehensive and qualitative angle.
Product and transport are analogy to ship and combined with its properties to explain connotation of its life cycle.
In the ship operation, ship maintenance because of working for a long time result in mechanical loss, so that mechanical equipment needed to make the necessary repairs and maintenance, which were a necessary part of the operation process.
To qualitatively analysis and evaluate the factors such as green performance and environmental pollution based on the theory of life cycle of ship and space-time network model.

As we known, carbonation and chloride ingress may make the coating disabled and lead to corrosion of steel bars, so the bond performance was affected and the service life of concrete structures depressed [8,9].
The results implied the bond properties between the coating and the steel bar may be affected at a certain extent by the action of carbonation and chloride ingress, while the failure modes of specimens had not change whether the coating subjected to environmental action or not.
Yongsheng, The effective factors of bond and anchorage performances of epoxy coated reinforcement(in Chinese),Industrial Construction,06(1999)45
Renchang, Experiment of anchorage properties for epoxy resin coated undeformed bars(in Chinese), Journal of Shandong Institute of Building Materials, 1(1999)56
Shanshan, The Influence Factors and the Mechanism of the Carbonation of Hardened Cement Pastes (in chinese), Chongqin University , 2014

Presumably, the needle-shaped microstructure affected the limitation of the slip system.
Introduction The r-value is one of the key mechanical properties of sheet steels for deep drawing and is basically dominated by the crystallographic texture, where the <111>//ND texture is favorable.
This result indicates the GBS does not play an essential role in the very high r-value main factor.
φ 1 Φ 0 90 90 0 The tensile properties of the electro-deposited pure iron are shown in Table 2 and its tensile strength is almost equivalent to commercial IF steel, although its r value, at over 7, far exceeds that of IF steel.
Such difference in continuity at the grain boundary is thought to be one factor of the limitation slip system.

In order to simulate the actual forming process of plate as much as possible and increase the prediction accuracy of residual stress, we improved the original finite element model of pressure head [9] by taking into consideration the smooth transition of the surface of square head , the screw hole in the center of pressure head and other factors.
However, due to that theoretical derivation process introduced too much hypothesis, and without considering some factors such as the inside displacement of neutral layer, the thinning of thickness, the contact friction between the plate and pressure heads, the differences between the two results are inevitable.
These factors are the reasons why the residual stress peak value is greater than the theoretical value of residual stress when the plate is under pure bending.
(3)The residual stress level of the forming piece is mainly affected by its mechanical properties, thickness, deformation and some other factors.
Vol.23 (2001), p.301 [6] Mingzhe Li, Zhongyi Cai and Chunguo Liu: Chinese Jouranl of Mechanical Engineering In Chinese.

The problems of stress corrosion or hydrogen blistering of gas pipelines are relevant and require careful study of the causes and factors that cause this type of corrosion-mechanical destruction of pipelines.
Fragile destruction of the structure is determined not only by the properties of the metal, but also by the load conditions, operating temperature [13], as well as the constructive solution of the structure or its individual elements and the technology of their production.
Mechanical properties of steels steel brand Mechanical characteristics СЕ, [%] Granularity σВ, [МПа] σ0.2, [МПа] Ψ, [%] δ, [%] 20А 545 287 50 20 0.328 ≥11…12 08 KhMChA 560 350 48 25 0.435 ≥11…12 09 G2S 497 349 48 23 0.441 ≥7…8 17 G1S 515 362 43 24 0.430 ≥7…8 Below (Fig. 8) are the results of measurements of the hydrogen content in the metal and the value of the microhardness of the 09G2S steel from the service life.
This process is carried out under the influence of activating factors (presence of chloride ions and tension).
The problems of stress corrosion or hydrogen blistering of gas pipelines are relevant and require a careful study of the causes and factors that cause this type of corrosion-mechanical destruction of pipelines.

However, the usefulness of this polymer is limited by its price and mechanical properties.
Blending is a commonly used technique in polymer technology that has successfully manipulated both price and properties of a range of commercial polymers [2,3].
Many researchers have tried to improve the mechanical properties of PLLA by developing techniques for blending PLLA with other polymers.
Our particular interest is in observing the detailed effects of polymer structure on these factors; Alpha 4, for example, is isomeric with polycaprolactone (PCL) which has been extensively studied in blends with PLLA [5,6].
This is a first step in the identification of compositional ranges for the necessary melt blending and fabrication work, together with extensive mechanical property and biodegradation studies in which both strong translucent crystalline materials and extensible optically clear materials will be important targets.

The damage of the printed wring assembly (PWA) was treated as one of the main factors of the failure of electronic equipment.
So, it’s clear that vibration is one of the important factors lead to failure of electronic equipment.
Also, random vibration and impact is one of the key factors for the reliability of packages [10].
The mechanical properties of the parts made up of the PWA were list in Table 2.
The contributeness of each mode in each direction maight be illustrated by the participation factors.

Moreover, the influences of the particle properties such as particle size and particle moisture content on the feeding rate are also investigated.
In analyzing the influence factors of feeding performance, the study in last twenty years has generally focused on the particle properties such as size, shape, surface structure, moisture content.
However, the flow behavior of particles is a complicated problem, as it is decided by particle physical properties, operation condition and the feeder [8-10].
, fill ratio and other factors.
In addition, screw parameters and particle properties should be considered for feeder designer.

In fact, most specifications forbid or limit the extensive re-use of recycled materials on grounds that they were contaminated and may affect the castings made from them.
Just as Alec Mitchell mentioned, nitrogen has a significant effect on superalloy mechanical properties, almost without exception in negative sense [6].
Actually Xuebing Huang had done some related researches in1990s on DZ417G alloy, in which Zr is removed, but more attention was paid to the effect of N on the properties of directionally solidified specimens [7].
And K417G alloy contained large amount of Ti, a strong nitride-forming element, so nitrogen existed mainly in the compound state which could affect the mechanical behavior in less direct ways [12].
But the atom radius of Ti and Mo is 0.1467, 0.1386 nm respectively[14], which would show favorable size factor for the assembly of Ti(C, N) and (Ti, Mo)C.