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Drawing engine universal performance characteristics map method based on MATLAB Zhipeng Zhang Jianzhen Zhang College of Mechanical and Electrical Engineering, Hainan University, Haikou, 570228 China 15120697945@163.com Keywords: MATLAB; Engine; Universal characteristics curve; fuel consumption Abstract: The changing tendency of engine performances in its operational range can be directly showed in the engine universal performance characteristics map.
But many real factors affect the engines operating conditions, such as road conditions, weather conditions and so on.
In additional, it provides dynamic property and economy characteristics research of engines, engines parameters calibration and matching of engines and drive line systems with more reliable basis

Introduction Dynamic recrystallization (DRX) is recognized as an important tool for microstructure refinement [1] and property control during hot deformation processes [2].
It is well known that deformation conditions (temperature and strain rate) as well as microstructural aspects (initial grain size and precipitates) in general affect the critical strain for DRX initiation.
The mechanical properties of Alloy 718 depend very much on grain size, which can be controlled by dynamic recrystallization taking place during hot deformation process.
It implies that the controlling factor for DRX nucleation is not the matrix precipitate (�”) or grain boundary phase (�), but the strain rate, i.e. the dislocation accumulation rate on grain boundaries.

Note that alloy 718 accounted for well over 50 percent of the total.[4] Many factors contributed to the evolution of today's alloys.
However, this tailoring causes a reduction in other mechanical and/or physical properties
These factors combined to make cobalt advantageous in static part applications that do not require high strength.
This was attributable to several factors.
The history of materials and process development for jet engines contains several prominent themes that will continue to be major factors

Process decision-making is the core of CAPP, and as the process is affected by the factors such as manufacturing resources, part structure, surface shape, etc. the processing sequences and methods possess indetermination.
In polychromatic sets, not only its elements, but also its entirety can be pigmented with different colors to represent the research object as well as the properties of its elements.
The concept of contour which is the abstraction and generalization of technical concepts such as nature, property, parameter, characteristic, indicator, etc. replaces the purely mathematical term "color" in the polychromatic sets and polychromatic graph.
Duan : Mechanical Science and Technology, Vol.17 (1998), p. 651-652, in Chinese

Weldline Fig. 1 Butt-weld finite element mesh After creation of the finite element mesh, it is necessary to specify the material properties as a function of temperature.
The properties of aluminum alloy 2014 are shown in Fig. 2, in which the Poisson ratio and density may influence very slightly the finite element calculation with the temperature variation, thus, their values are assumed to be constant and are 0.33 and 2.8×10-6kg/mm3, respectively.
Fig.2 Material properties of AA2014 Finally, the suitable heat source after checking, surface convection, radiation and boundary conditions can be loaded so as to carry out the finite element calculation.
Therefore, it can be considered that the molten zone may correspond to the temperature being more than 507℃ and the heat affected zone (HAZ) may correspond to the temperature being lower than 507℃.
Fig. 6 shows that the heating curves corresponding to the heating rates and the heating temperatures by applying three welding processes; the relation between the heating rate vH and the heating temperature can be in the linear function for the laser welding and the laser-TIG hybrid welding; the slope factors are -7.33 and -5.53 for the former and the later respectively.

The physical properties of materials from the different processing combinations were investigated.
The versatility of activated carbon is offered by its textural properties and the ability of tailoring the surface for chemistry based on the targeted application.
This study seeks into investigate the impacts of the various processing techniques on the chemophysical properties of Egyptian Peanut Shell (PSH) as a case study.
The aforementioned functional groups attached on the surface of the carbon gives it its unique properties to determine its applicability in the intended field such as adsorption, gas sensing or energy storage.
Trugilho, “Factors affecting the mechanics of carbonized wood: literature review,” Wood Sci.

Novel Straight Type Aortic Cannula with Spiral Flow Inducing Design NOFRIZALIDRIS DARLIS1,a, NADIA SHAIRA SHAFII2,b, JESWANT DILLON3,c, KAHAR OSMAN1,2,d, AHMAD ZAHRAN MD KHUDZARI2,e 1Faculty of Mechanical Engineering, 2IJN – UTM Cardiovascular Engineering Center, Faculty of Biosciences and Medical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, MALAYSIA 3Institut Jantung Negara (IJN), Kuala Lumpur, Malaysia anofrizalidris@yahoo.com, bnaddyshaira@yahoo.com, cjeswant@ijn.com.my, dkahar@fkm.utm.com.my ezahran@biomedical.utm.my Keywords: Spiral flow, aortic cannula design, arterial cannulation, cardiopulmonary bypass, computational fluid dynamics.
Aortic cannula is one of major factors leading to adverse events such as thrombosis and atherosclerosis development during open heart surgery, due to oxygenated blood outflow with high velocity jet from heart lung machine (HLM) when exiting the cannula tip into the ascending aorta.
Numerous study have been done to improve the aortic cannula and minimize flow complication on these design factors cannula length effect [4], cannula tip modification (multiple stream and dispersed stream [5,6]; and recently the design was directed to inducing spiral flow [7].
Blood is considered as a Newtonian and incompressible flow with constant hemodynamic properties (ρ = 1050 kg/m3, µ = 0.00345 N.s/m2) was employed and no-slip boundary condition were enforced at the vessel wall.
Pressure drop from cannula inlet centre point to outlet centre point, pressure contour, velocity streamlines and wall shear stress (WSS) were also used as results outputs to delineate the flow behaviour of each cannula designs affected by the number of groove.

(iii) How can the internal mechanical stresses and thermal disorder affect GB diffusion?
Then, the next task is to study properties of such defects in the boundary.
Within this model, we can anticipate that external stresses can largely affect the stability of point defects in GBs.
Although the incorporation of the interstitial flux along GBs is unlikely to change the basic expression for the creep rate, the factors characterizing the diffusion flux in that expression may need to be modified.
Further studies of the structure and high-temperature properties of twist GBs, particularly with respect to diffusion, are highly desirable.

The effects of Fe doping on the microstructure, dielectric and tunable properties of thin films were analyzed.
For PST, Yang et al. reported the improved significantly dielectric and ferroelectric properties of Mn doped Pb0.5Sr0.5TiO3 thin films [H13H].
The structural and dielectric properties of PST thin films were characterized by various techniques.
The microstructure is one of the key parameters determining the dielectric properties.
The structural, surface morphological and dielectric properties of PST thin films were investigated as a function of Fe concentration.

D113 weakly acidic ion exchange resin is cationic one with macroporous structure and carboxylic acid base (—COOH), and it has high mechanical strength [4-5].
Hydrogen ions on the carboxyl can exchange with metal ions or other cationic in the solution, at the same time oxygen atoms on the carboxyl and metal ion coordinate directly, so the resin and a variety of metal ions can form relatively stable coordination compound under a certain acidity, the macromolecule ligand retains various excellent properties of low molecular one, in addition due to macromolecule effect the resin has the advantages of convenient separation, reusable and so on, which can greatly reduce the cost[6-8].
During the precursor preparation the effects of some factors such as Zn/Al molar ratio, pH value, temperature, etc. on the performance of resin static adsorption were studied.
This reason was that under high pH value, although in Zn/Al solution the precipitate wasn’t obtained, there were Zn/Al hydroxide, clathrate , and so on, which affected the resin adsorption on Zn/Al, and then affected the microstructure of product after calcination.
Preparation and Gas-sensing Properties of Zn-Al Metal Oxide[D].