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However, there are salient parameters that affecting the compressive strength of geopolymer.
Introduction Fly ash has been used to replace cement in the concrete industry for several years because it contributes beneficial properties to concrete [1], especially with respect to its high compressive strength compared to cement.
Another factors that influence the compressive strength of geopolymer are the fly ash/alkaline activator ratio and Na2SiO3/NaOH ratio.
In this manner, the properties of the geopolymers produced under several different conditions were studied.
Davidovits, in: Properties of Geopolymer Cements, First International Conference on Alkaline Cements and Concretes (1994), p. 131-149

Introduction Commercial real estate, also known as business real estate, refers to those real estate investment goods that can generate benefits in the form of property appreciation via reasonable operation.
First, according to construction drawings and technical information on technical measures, construction procedures, work organization, mechanical equipment selection, and allocation of human resources, careful analysis and study, to optimize the construction program, the rational allocation of production factors, reasonable and feasible for the preparation of scientific responsibility to create conditions for the budget.
Meanwhile, after repeated comparisons to develop materials, mechanical unit control table, combined with on-site construction conditions were calculated for each sub-project of the responsibility of the budget.
If a lack of project cost control plans, no pre-development cost targets, how can we inspect the implementation of the target and adjust them, only to strengthen the post-control; Cost control system, is the work content of the relevant factors that affect the cost of the system to manage and regulate, and to ensure the implementation of the concept of cost control to the relevant departments, in one aspect or part is not a loophole, and will not like such a project would be left to the last question, by the Ministry of sticking to a hard budget buckle to reduce costs, especially when some of the other departments, due to strict cost impact, such as the content is not enough to confirm the completion of the real, the budget department shall not re-verification and correction to the scene, not only affects the work efficiency, but also prone to misunderstanding, leading to poor coordination between departments.
Horizontally, the building will be located in the settlement, the relevant departments of the cost impact factors and systems to manage them, through the establishment of standardized work systems and processes, strengthen collaboration, the cost of the whole process to achieve all-round control.

The chemical compositions and mechanical properties of these alloys are given in Tables 1 and 2, respectively.
Mechanical Properties Yield Strength, MPa Tensile Strength,MPa % Elongation Al 6061-T6 287 315 16.4 JIS S25C 269 520 31.0 Previous Test Results [6] A.
Then, the crack opening stress intensity factors Kops, Kopi and the values of a were determined for those materials.
Therefore, it is important to understand that both the work-hardening coefficient and Young’s modulus are key factors, determining the crack closure characteristics.
(4) Both the Young’s modulus and work-hardening coefficient are key factors for determining the crack closure characteristics.

Introduction Fabrication of ultra-fine grained (UFG) metallic materials by applying severe plastic deformation (SPD) is currently of a great scientific interest due to their unusual mechanical properties [1].
Therefore, in order to understand better the essential details of deformation, the effectiveness and influencing factors on grain refinement of GP, and distinguish between CGP and UGP, the authors here try to study systematically the deformation behavior, microstructure evolution and mechanical properties of a 5052 Al alloy deformed in CGP and UGP by adopting three-dimensional finite element simulation (3D FES) combined with experimental investigations.
The properties of 5052 Al alloy were described by , where σ was the flow stress, ε the strain, the strain rate and T the temperature.
Consequently, there might be instabilities in microstructures and properties within these zones.
Conclusions The deformation behavior, microstructure and mechanical properties of a 5052 Al alloy deformed in CGP and UGP were investigated by adopting a 3D FES combined with experiments in this paper.

Specifically to casing damage, there are two factors: geological factors and engineering factors.
Geological factors can be divided into formation heterogeneity, rock properties, fault revival, sand production, earthquakes and crustal movement, etc.
When the geological factors are combined with engineering factors, and the force goes beyond the casing bearing capacity, casing damage occurs, as described in the following: Casual factors and mechanism of casing damage The force over the casing bearing capacity Cementing well quality Perforation problem Casing material corrosion Acid fraturing etc.stimulation measures施 Water injection with high stress factost Sand Production Crustal mmovement Fault activation Rock Property Formation heterogeneity Casing damag Geological factors Engineering factors Fig. 4 Casing damage factors and mechanism of schematic diagram Geological hazard factors.
According to the characteristics of formations, geological hazard factors are divided into several major aspects: rock properties and fault revival.
Rock properties. (1) Mudstone bibulous creep.Bibulous mudstones are widely distributed with ever changing mechanical properties and the stress state.

This intelligent BP network model can forecast the condition of actual production precisely by setting the input properties of the material and the integration of products in order to fit the requirements of the wood-plastic composited production more successfully.
When the network was trained in any input samples, the output of the kth node can be affected by G input sample in the interface layer, and the output can be displayed as: (1) Where Vki was the Kth linked weight between input and interface layer; XiG was the ith input value in the input layer. θiG was the ith node output for output sample; Zk is the kth node threshold in the interface layer, separately
When established the model, flow condition and properties of WPC have been taken full into consideration.
However, in the actual production, the factors of costs, screw’s material, pressure and using environment should take into account to build a more consummate intelligent neural system.
Mechanical design, 2005.22 ( 4 ) :57 -59

Box 919-987, Mian Yang, 621900, Si Chuan, China afjhsunwind@sina.com, bwanzhenyu@126.com, cwjhu@vip.sina.com Keywords: diamond-like carbon films; graphitization; computational chemistry; frictional properties Abstract.
Introduction The diamond-like carbon (DLC) films present unique mechanical properties because of their low friction coefficient and self-lubricate characteristic [1, 2].
Friction Models and results Three dimensional structure of DLC films is important in determining their mechanical properties.
The results show that the prove graphite transformation is a key factor of the low friction coefficient for DLC film.
Graphitization of Nanodiamond and Properties of Nanodiamond/Cu Composite [D].Dissertation Submitted to Tian Jin University for Doctor Degree, 2007.6. ( in Chinese)

As Cu and W have a huge difference in melting point along with poor wettability, the bond between W and Cu is seriously affected, thus lowering its properties.
For WCu composite materials, the properties mainly depend on the porosity and grain size.
All these factors contribute to the enhancement of the hardness.
Cu phase can wrap W phase continuously along the grain boundary of W. 3) An appropriate Ce addition into W skeleton can improve the combination of properties of WCu composite materials.
Chen, “Microstructure and mechanical properties of tungsten composites co-strengthened by dispersed TiC and La2O3 particles,” Int.

Explosive Air Blast Loading Blast wave pressure-time history The observed characteristics of air blast waves are found to be affected by the physical properties of the explosion source.
Higher shape factors indicate less uniformity in the fragment shape and hence larger surface area.
Dynamic Analysis and RC Structural Response to Blast Loading Dynamic increase factors The mechanical properties of concrete and steel under dynamic loading conditions can be quite different from that under static loading.
Strength magnification factors as high as 4 in compression and up to 6 in tension have been reported.
The pressure-time history from a conventional explosion is primarily dependent on two critical factors, the charge weight and standoff distance.

However, it is well known that the presence of grain boundaries affects and degrades the energy conversion of polysilicon.
Fortunately in the last two decades, more basic and systematic investigations of structure-dependent electric and mechanical properties have been made for semiconductors [2,3] and electroceramics [4], as discussed later.
For this purpose, basic knowledge of structure-dependent grain boundary properties is indispensable.
This paper reports some new results from experimental work on the control of grain boundary microstructure and bulk electric properties by unidirectional and rotational solidification from the melt.
Accordingly the grain boundary character distribution (GBCD) and the geometrical configuration of low-energy and high-energy boundaries are key factors controlling the performance of polysilicon