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So the research should start with the man's common property and the interrelated special property of product.
The knowledge and experience influence directly or indirectly has relation with the system that is used by client, so the designing of product must consider these factors completely. 2 Ergonomic analysis of numerical control machine 2.1 Ergonomic analysis of machine door Machine door is an important part of the machine shape, and it has more frequent contact with the machine operator.
There’re many factors to consider when designing the handle, as a grasping part, its diameter and length should be suit with man’s hand size to make it comfortable to grasp and easy to operate.
However, there are still many tools with short handles, which considers how the length of the handle affects man’s grip.
Human design in the appearance is the main point of machine design, so man-machine performance of the appearance will directly affect people's evaluation of the machine.

The mechanical behaviour of this material was assessed by carrying out a flexural testing.
The material stiffness was affected by the high modulus of GFRP skin and the core thickness.
This is due to the unidirectional fiber orientation factor loads.
Other factors that influence the decrease of the bending stress is due to the dimensions of the composite sandwich ever greater.
When the core demageThen the ability of the sandwich composite materials to receive the bending stress will be reduced so that the voltage will be suffered by the skin. ability to withstand loads on the skin quite well is due to the nature of the skin tend to be hard and brittle. while the polyurethane elastic properties.

The hydration mechanism of the cementitious material, however, could directly affect the microstructure of its hydration and hardening and the development of each kind of physical and mechanical properties of the concrete and could afterwards influence the cracking resistance property and durability etc. of the concrete.
In the early stage of hydration, NG is the governing factor.
With the advance of hydration, I and D gradually become the governing factors.

Three controllable variables, electrode force, wielding current and welding time were selected as factors (A, B and C), and each factor at three levels.
No interaction among these factors is assumed.
Larger the mean square (V) of the factors was, more significant influence was on the tensile shear load and diameter of nugget.
The data of mean square in Table 4 indicated that the order of the three factors effects was B>A>C.
Welding current was the most dominant factor that affects the tensile shear load and diameter of nugget for 201 stainless steel.

It discusses ways of finishing the texture of the surface to obtain proper anti-skidding properties.
One of the basic factors that influence the durability of all roads including concrete ones is fast and effective drainage of rainwater and meltwater from the body of the road, especially from the roadway surface.
One of the most important operations in building concrete surfaces is texturing fresh concrete – giving the concrete surface a properly coarse macrotexture that will improve the anti-skidding properties of the concrete surface.
A characteristic parameter that anti-skidding properties depend on is the roughness index Rn [1] defined as (1) where W1 … W5 – ordinates of 5 highest points of the surface in the measured section where D1 … D5 – ordinates of 5 lowest points of the surface in the measured section On the basis of Rn a finished surface can be ascribed to a particular roughness class [2] which is a condition for meeting the requirements that concern the anti-skidding properties of the concrete surface (table 1).
Brushing is mainly done manually, perpendicularly to the axis of the road, but mechanical brushing in the longitudinal direction is also possible.

The difference in optical properties shows that the morphology of the material affects the optical properties of the material.
Optical properties of composite rGO/ZnO Nanorods Characteristics of rGO/ZnO Nanorods Composite as DSSC Photoanodes I-V characterization shows the electrical properties of rGO/ZnO nanorods composite as DSSC photoanode.
The results show that the addition of GO to the rGO/ZnO nanorods composite affects the Voc and Isc values of the DSSC, thus affecting the efficiency value.
I-V curves Summary GO addition to ZnO to obtain composite rGO/ZnO nanorods can affect the structure, morphology, and optical properties of the material as shown by testing XRD, FTIR, SEM, and Uv-Vis spectrophotometer.
O’Brien, “Understanding the factors that govern the deposition and morphology of thin films of ZnO from aqueous solution?

Introduction In recent years, aluminum nitride (AlN) has been concerned extensively as its the excellent physical, chemical and mechanical properties.
Substrate temperature affect the growth of the film likely with the sputtering power so without this retelling.
Ar flow ratio affect magnetron sputtering glow, the results show that the glow has little effect on the film surface morphology.
[3] Wright.A.F,Nelson.J.S:Consistent structural properties of AIN and Physical Review,1995,51: 7866—7869
[5] Jian.L.F, Shen W.Z: Temperature dependence of the optical properties in hexagonal A1N [J].Journal of Applied Physics2003,94(9):5704—5709.

Young’s modulus of the wire affected the force vs. elongation curve most effectively.
From these properties it can be used for actuators or control devices.
To analyze and design structural components such as hybrid composites involving shape memory alloys it is necessary to account for their unique mechanical behavior properly.
Young’s modulus of the SMA was the most influential factor and Young’s modulus of the CFRP matrix did not affect the force-displacement result as much as Young’s modulus of the SMA wire.
Kim, Mechanical Behavior of Shape Memory Alloy Composites, Key Eng.

Many factors affect the economic efficiency of an ACC system; the most important factor is the ambient dry-bulb temperature, which directly affects the air cooling system's condensation effects.
Secondly, its excellent thermophysical properties; in standard atmospheric pressure (101.325kPa), the fusion point is -77.7oC and the freezing point is -33.4oC.
A turbine relative internal efficiency of 0.9, a mechanical efficiency of 0.98, a generator efficiency of 0.98 and a estimated gross to net conversion factor of 0.9 have been used.
The freeze problem of ammonia could not been considered when it used as cooling medium due to its physical properties.
So the most important factors for LEC are the total investment of the plant and the annual net electricity delivered to the grid.

To the best of the authors’ knowledge, however, no systematic study has reported the characteristic of gas generation from IBA and investigated factors affecting the degree of this reaction.
The physical and the mechanical properties of the resulting IBA lightweight mortars are reported and discussed.
The physical and the mechanical properties of the resulting IBA-AACs were experimentally determined and the microstructure of IBA-AACs was studied.
Evidence of Al–Cr interactions affecting Cr-leaching from waste incineration ashes.Waste Manage 2003; 23(1): 89-95
Effect of alkali on hydration process and properties of cement.