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Many factors influenced the release and degradation of the PLGA release systems.
These factors included polymer composition, molecular weight, the interaction of polymer and drugs, properties of drugs, plasticizer or additives [1,4,5].
Conclusion ASP could be effectively incorporated into PULG networks with shape-memory properties by swelling methods.
Okada, The effects of drug physico-chemical properties on release from copoly (lactic:glycolic acid) matrix, Int.
Lendlein, Biodegradable, amorphous copolyester-urethane networks having shape-memory properties, Angew.

Results which are obtained using the two – phase mixture model indicate that adding the nanoparticles causes changes in the properties of nanofluid and finally increases the temperature of the flow.
However, due to the fact that the effective properties of nanofluids are not known precisely, the numerical predictions of this approach are, in general, not in good agreement with experimental results.
Therefore, the concerns in single phase modeling consist in selecting the proper effective properties for nanofluids and taking into account the chaotic movement of ultra fine particles.
Due to several factors such as gravity, friction between the fluid and solid particles and Brownian forces, the phenomena of Brownian diffusion, sedimentation, and dispersion may coexist in the main flow of a nanofluid.
The physical properties of the fluid are assumed constant except for the density in the body force, which varies linearly with the temperature (Boussinesq’s hypothesis).

It is possible to solve the problem of obtaining effective fine-grained concretes by using the modifying additives [2-9], due to their concrete structure and properties regulating effect [10-17].
A special part is assigned to dispersion-reinforcing additives [18-20], belonging to the group that regulates the properties of concretes and mortars in accordance with GOST 24211 [21].
Halloysite nanotubes were introduced into the concrete mixture in the form of a stabilized suspension, obtained by ultrasonic dispersion in a bath-type mechanical activator at the ultrasound frequency of 35 kHz.
The selected variation factors affecting FGC properties were the content of cement (C= x1 from 200 to 600 kg per cubic meter of concrete), the content of brass plated fiber (BF= x2 from 0 to 20%) and the content of halloysite nanotubes additive (NA= х3 from 0 to 20%).
Mishina et al, Research of physical-mechanical and rheological properties of high-strength steel fiber concrete, Academia.

The factor limiting the further use of these alloys is their poor room temperature ductility.
Alloying Ni-Si alloys with transition metal elements such as Cr, Nb and Ti have resulted in significant improvement of the properties of the composites [1-7].
Alloying with Cr was demonstrated to have positive influence on mechanical properties of Ni3Si-based alloys especially on ductility and corrosive properties [3].
The improvement of corrosive properties in sulfuric acid solution was also investigated.
The microstructures of coatings are affected greatly by the addition amount of Cr.

f-the tension of each trunnion k-application factor, because of acceleration ,repeated use and some uncertain factors, it takes k=1.2.
When hardware work in the hot environment, creep properties will change the mechanical properties of material greatly.
Because the temperature of iron ladle wall is about 350℃ in working field, so the trunnion area of iron ladle can’t occur high temperature creep, and the mechanical properties of material are almost invariant.
The stand or fall of the grid classification directly affect the computation precision and speed.
So, the safety factor n=3; the allowable stress.

All above factors can promote the initiation of the fatigue cracks considerably.
Materials Properties (1) The properties of 247# super alloy The material of the sealing disk is 247# super alloy, the material properties are as follows:Density ρ=8320kg/m3; Poisson’s ratio μ=0.3.
Table 1 The Mechanical Properties of 247# Superalloy at Different Temperatures T [℃] 20 650 750 E [GPa] 201 179.5 171.9 б0.2 [MPa] 755 686 686 бb [MPa] 1205 1127 931 Table 2 The Linear Expansion Coefficient of 247# Superalloy at Different Temperatures T [℃] 20~100 20~200 20~300 20~400 20~500 20~600 α[10-6℃-1] 12.5 12.9 13.3 13.7 14.0 14.4 (2) The Mechanical Properties of 79# Powder Metallurgical Material The material of the sealing disk is 7No.9 powder metallurgical material, its properties are:Density ρ=8360kg/m3; Table 3 The Elastic Modulus and Poisson’s Ratio of 79# Powder Metallurgical Material at Different Temperatures T [℃] 20 300 500 650 700 E [GPa] 214.7 208.6 197.6 189.6 186.4 μ 0.307 0.317 0.328 0.337 0.340 Table 4 The Linear Expansion Coefficient of 79# Powder Metallurgical Material at Different Temperatures T [℃] 20~100 20~200 20~300 20~400 20~500 20~600 α [10-6℃-1] 11.1 11.6 12.1 12.7 13.0 13.2 It is specified in the material specification of 7No.9 material that, while
(2) Design structure According to the cyclic symmetry properties of the sealing disk model, a 45°fan-shaped segment is made to be the calculation model, see Fig.13.
Tian: The Basis of Failure Analysis (Mechanical Industry Press, 1989) [8] Donghan.

In this presentation, a new class of polymer, polysulfone-poly(ethylene oxide) block copolymers (PSF-b-PEOs) has been chosen as a candidate for its good mechanical properties and biocompatibility.
In vitro drug delivery properties of the stents are also described.
Many factors such as drug loading level, the viscosity of PSF-b-PEO/drug solution which is determined by PSF-b-PEO/drug concentration, the feed rate of solution and the number of spraying layers greatly affected the quality of the coatings.
The coating layer displayed good mechanical properties which prevent any cracks or peels when the stents were expanded.
In vitro study of drug-eluting stent coatings based on poly(L-lactide) incorporating cyclosporine A - drug release, polymer degradation and mechanical integrity.

Noted tendencies can be considered in further researches of phytotoxic and phytostimulating MWCNTs properties.
Among all nanomaterials, carbon-based materials (particularly, MWCNTs) have attracted much interest due to their unique mechanical and chemical properties, they are produced in large amounts and can be used for developing effective products for agricultural and environmental applications [2].
Difference in outputs can depend on several factors, such as species dependent effects, plant age and development stage, nanomaterial concentration and surface area, and many more.
Noted tendencies can be considered in further researches of phytotoxic and phytostimulating MWCNTs properties.
Biris, Carbon nanotubes are able to penetrate plant seed coat and dramatically affect seed germination and plant growth, ACS Nano. 3 (2009) 3221-3227

The variation in the mechanical, chemical, and physical properties of AM parts are not shortened only in parts produced on different machines but also can be obtained across parts produced by using the same 3D printer and maybe in the same singular part itself when comparing these properties along the build direction.
Some applications may include aerospace industry require consistent mechanical and physical properties, i.e., the surface profile is important for aerodynamic and drag forces performance.
The achieved melt-pool temperature is based on these factors and many other parameters like the metal type, absorption of the laser irradiation, the laser type and wavelength.
This temperature variation can negatively affect the produced part properties and imposes the need for post processing.
Effect of heat treatment on microstructure and mechanical properties of 316L steel synthesized by selective laser melting.

By introducing the deviation factors such as seal strip reaction force and door’s dynamic deformation, the closed-loop relationship of size of the sliding-door system when it is in closed state is further established.
Multidisciplinary optimization (MDO) method was used in their study to establish the intersected feasible region for different constraints, and the sensitivity and the contribution of each respective feasible region have also been analyzed Fukumara et. al [2] used the finite element method to analyze and simulate the deformation defects of the car door panels, and obtained the explicit solution of the outer plate deformations simulation; Wagner [3] analyzed the three important performance factors in the study and design of the seal strip performance of car doors: mechanical and deformation characteristics, contact pressure distribution, and pressure difference; Zou et. al [4] developed an effective method for door system reliability analysis by using doors deviation characterization, and the higher efficiency and accuracy of this method were proved by numerical examples.
The dynamic performance of a sliding door system in closed state is affected by the characteristic of the seal strip itself and also the installation deviation.
With the aim to resolve this issue and find the factors that affect the overall dynamic performance of the sliding door in closed state, a flexible deviation model of the sliding doors is proposed in this paper on the basis of influence coefficient method, and the closed-loop size relationship of the door system in closed state is also established.
With "N-2-1" positioning program, the influence of complex assembly factors can be considered.