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Torlerance design is one of the most important part in product development, which can affect the quality of product.
Steady quality design goal is to decide the level of the control factors set, make quality characteristics to achieve the ideal of function, not by the interference factors including the changes that have big quality characteristics variation, in other words, quality characteristics of interference factors for sensitivity to a minimum, or quality characteristics for interference factor is steady.
Steady quality design principle is to use the existence and the product or manufacturing system of two properties: (1) using quality characteristics and control factor of the nonlinear relationship to reduce the influence of internal interference factors. (2) using interference factor and the interaction between the control factors to reduce external disturbances or measuring interference factors.
Beijing: mechanical industry press, 1999.11.
Mechanical design and manufacturing, 2000.4.

The use of theory of limit equilibrium of forces and moments to compute the FOS (Factor Of Safety) against failure.
Result and Discussion Soil Properties The disturbed and undisturbed soil samples were collected from near the ground surface up to 1.5 m depth of the study area.
A series of laboratory testing were conducted to determined soil properties, which can determine the soil type and geotechnical properties.
The main physical index property of the soils investigated in this study was soil classification, which depends on several factors such as the Atterberg limits, specific gravity and particle size distribution.
Quantifying the mechanical and hydrologic effects of Riparian vegetation on stream- bank stability.

The slag content, the creation of the early hydrated products, pore structures of OPC mortars introduced with BFS are considered as the main factors.
Physical and chemical properties of BFS are believed as the reason.
“Mechanical activation of granulated blast furnace slag and its effect on the properties and structure of portland slag cement”, Cement and Concrete Composite, 30, 679-685
“Hydration, structure, and properties of blast furnace slag cements, mortars and concrete”.
C., and Wellington R., Mechanical properties, drying and autogenous shrinkage of blast furnace slag activated with hydrated lime and gypsum, Cement & Concrete Composites, 32 (2010) 312–318

Assessment of physical-mechanical and technological properties of the materials was performed according to standard procedures.
The results of testing samples of the material demonstrate a low value of water absorption (30 days - 0.85 %), which positively affects its mechanical properties.
The poor quality of the impregnation of the filler with a highly viscous binder melt leads to a decrease in the mechanical properties of PCM.
By the level of physical and mechanical characteristics, fire hazard properties and heat resistance, these materials fully comply with the requirements for modern thermoplastic PCMs and are not inferior to foreign analogues.
Gu, Factors affecting thermal conductivities of the polymers and polymer composites: A review, Composites Science and Technology. 193 (2020) 108-134

Graphene has particularly interesting chemical and physical properties, including high chemical and mechanical resistance, excellent thermal and electric transport, high transparency.
With regard to mechanical properties, a graphene sheet behaves similarly to a sheet of paper: when we try to pull it along the plane, it offers considerable resistance, but a small force is enough to bend it on itself.
- Composite materials with polymers, light and with high mechanical properties for aerospace uses
A purpose of the controlled surface oxidation is the realization of anchor points for extra surface groups aimed at the union of biomolecules (peptides, DNA, growth factors) by means of carboxylic groups [16-18]
Another parameter that strongly affects the applicability range of a sensor is its mechanical, thermal, chemical robustness.

In the report presented by Haliyo et al [1], the mechanical vibration was used as an active release technique to overcome adhesion force.
The attraction is related to the inverse powers of the separation and is affected by material properties [14].
These two kinds of VDW force is related to the Hamaker constant, which is a function of the dielectric and optical properties.
The objective here is to find the Pull_in voltage and the maximum beam deflection before snapping and to show how the electrostatic force and van der Waals force affect on the gripping in nano scale.
[10] Gupta RK, "Electrostatic pull-in test structure design for in-situ mechanical property measurements of microelectromechanical systems", PhD thesis, MIT, Cambridge, 1997

In the complete exploitation of coal plough equipment is mainly application three types by the geological conditions, physical and mechanical properties of coal conditions, drag hook-type coal plough, skidding-type coal plough, compact skidding-type coal plough.The author application gray connection decision method, it carries on decompose to multi-ranks forthere ways, and it carries on multi-layer decomposition to each rank, it used the entropy value law to determined that each rank weight value, it calculates total membership function for different way, it has established the gray connection decision model for coal plough equipment way, The model reduced subjective factor influence, and the coal plough equipment plan be provided powerful theory support.
Fuzzy judgment strategy based on grey theory The fuzzy judgment is total appraisal of phenomenon which involves fuzzy factors .The factor dynamic development momentum similar degree with the interrelatedness.
Consider the influence of all factors, it descried the i line of R from the factor judgment， the each degree of select element ith depend on the influence judgment object of factor and the j line of R ， the degree of prepare selects element of the jth depend on the object of influence judgment of all factor, therefore can used the sum of available each row element： Reflecting the synthesis influence of all factor, but did not consider the important degree of each factor，If also consider the weight number of each corresponding factor, then can reflect the synthesis influence of all factor reasonably.
The fuzzy synthesis judgment of mining equipment of affect was appointed 2-level in this article.
(2) To affects The coal plough equipment 5 aspects, 18 factors carryed on division, used entropy value law to calculate degree of membership, it has established multi-level fuzzy gray connection decision model.

However, there are critical limitations in applying the HA to real systems because of its poor mechanical properties [3].
On the other hand, zirconia (ZrO2) possesses excellent mechanical properties.
We studied the structural, mechanical properties, and phases of the scaffolds prepared under various processing conditions.
It can be seen, as the HA-ZrO2 concentration was increased, the pores became interconnected with more dense and thicker pore walls, which are important factors that improve the mechanical properties of the porous materials.
Clearly, the mechanical properties of porous HA-ZrO2 scaffolds are significantly affected by the concentration of the ceramic powder in the slurry and doped with 20% ZrO2.

Introduction All-ceramic materials are recommended as a restorative materials for natural teeth for its good aesthetic properties and stable physical and chemical properties, satisfactory results can be achieved for all-ceramic restorations in patients with high aesthetic requirements, metal allergy, and worrying about metal affects MRI[1].
The all-ceramic restorations have the advantages of stable physical and chemical properties, good mechanical property and excellent aesthetic performance, so the application of all-ceramic restorations is increasing in clinical.
The factors affecting the relative translucency of all-ceramic restorations include crystal type, size, content and refractive index, thickness of venner, color and internal porosity, and light wave length and so on[7-10].
The process of vennering will affect above factors ineluctable thus led to the difference of relative translucency.
The influence of colored zirconia on the optical properties of all-ceramic restorations, J.

Depending on operating conditions they must have specific electrical properties or defined mechanical properties.
The insulating properties remain.
In previous studies it has been found that many factors influence the formation of the composite [7,8].
Furthermore, the plurality of the parameters during the manufacturing affecting the composite properties.
For the suspension preparation particularly the kind and amount of additives are influencing factors.