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One of them shows coarse block phase and a darker color morphology compared to other second phases, which can not be determined clearly by OM, and the other alloy shows a kind of dense lamellar eutectic structure.
X-ray diffraction (XRD) patterns of the alloy ZA92 (Fig. 2(a)) indicate that these alloys are mainly composed of α-Mg and a small amount of Mg51Zn20 phase, known as ε, which has a bct structure (space group Immm with lattice parameter a= 1.4083 nm, b= 1.4486 nm, c= 1.4025 nm[4, 5]).
Micro-compositional analyses carried out by EDS indicate that the elemental composition of block shaped precipitates and dense lamellar eutectic structure in ZA92 alloy corresponds to τ and ε phase, respectively.
On the basis of XRD patterns (Fig. 2(b)) and SEM analysis (Fig. 3(b)), the composition of the phase with lamellar eutectics morphology is approximately equal to that of the phase of f (Al2Mg5Zn2) with an orthorhombic crystal structure (space group Pbcm, a= 0.90 nm, b= 1.70 nm, c= 1.97 nm[6]) except for the remaining peaks of α-Mg matrix and τ phase.
Uda: Journal of Solid State Chemistry Vol. 36(1981), p. 225 [6] L.

Modern bioinformatics mainly includes 3 important contents, containing genomic bioinformatics, protein structure simulation and drug design.
And bioinformatics is such a new technology combined several fields of theoretical approaches, containing biology, mathematics, statistics, physics,chemistry, information science and computer science, which may be able to solve this problem, in this context.
So, it is no wonder that Min Wu, the academician of the Chinese Academy of Sciences (CAS), indicate: “It is urgent to develop genomics and bioinformatics.” 2.3 Drug design In recent years, with the development of structural biology, the tertiary structure of a considerable number of proteins,nucleic acids and polysaccharides have been measured precisely.
So, drug design based on macromolecular structures has become a hotspot.Except the spatial structure information of biological macromolecule, bioinformatics can also provide the electronic structure information (including energy level, surface charge distribution and molecular orbital interaction, etc.) and the dynamic information (including energy transformation, charge transfer and conformational change in biochemical reaction).And theoretical simulation can also study the quantum effect of biological molecules, which provide a guarantee of accurate and efficient drug design.

Mechanical properties of fumed silica / HDPE composites Jing Zhao1,2,a ,Di Wu2,b,Jinyu Han2, c ,Zheng Jin1,d* 1Key Laboratory of Chemical Engineering Process & Technology for High-efficiency Conversion , College of Heilongjiang Province, Heilongjiang University, Harbin, China 2School of Chemistry and Materials Sciences, Heilongjiang University, Harbin, Heilongjiang, China a836875732@qq.com, b813687930@qq.com, c1015519403@qq.com, d*jinzhengdvd@163.com, *corresponding author Keywords: High Density Polyethylene; Fumed Silica; Composite; Mechanical Properties; Enhance Abstract.
After silane coupling agents is used, hydroxy on the surface of fumed silica has chemical reaction with siloxane linkage, forming organic structure on the surface of fumed silica, which could decrease the surface energy of fumed silica, improve its compatibility and scatter with polymer.
As the large specific surface area of the inorganic particles of this size, it is easy to aggregate together to form aggregates in the structure of Fig. 1.
The nucleating agent also has an effect on both the crystal grain structure and the unit cellstructure.
At the level of the aggregation structure, crystallinity decreases and spherulite size tends to increase with increasing nucleating.

If we take advantage of this mechanism of defects produced by the mold structure, billets, process parameters, etc. to take measures to increase the metal flow imbalance, they can use materials in the pipe extrusion process in the asymmetry directly through the squeeze pressure to be pipe bending parts.
The study of this topics, the use of structural design of eccentric, through the eccentric compression achieved bending tube forming, blank as a single whole, in the extrusion pressure, because of eccentric design of the structure of an imbalance which makes the metal flow out of tube bending parts, mold structure diagram shown in Figure 1[5]: 1. bottom mold base 2. die fixed plate 3.die 4. upper mold base 5. punch 6. platen 7. punch fixed plate 8. briquette 9. blank Fig.1 Model of the die The advantages of this technique: （1） Through the eccentric structure design to achieve different export locations in the mold metal flow velocity (flow) control, in order to achieve control of the curvature of the pipe bend
In the geometric model the structure that unrelated to the simulation can be omitted.
Acknowledge: This work was supported by the National Natural Science Foundation of China, No.50975205, and Tianjin Key Subject for Materials Physics and Chemistry.

Establish the simulation model, and its performance is analyzed[7].The structure of BP neural network PID control is shown in Fig. 1, the network is constituted of input layer, hidden layer and output layer nodes, nodes of Layers connect through the right, these constitute the relation matrix between input and output.
Fig. 1 Structure of BP neural network PID control Use incremental digital PID control algorithm: (1) (2) For BP neural network part, superscript (1), (2), (3) represent the input layer, hidden layer and output layer.
When determine the number of input layer nodesand the hidden layer nodes, given initial value,, and choose the appropriate learning rate and inertia coefficient, the controller structure is determinated.
Fig. 2 Structure of BP neural network PID controller Simulation block diagram of BP neural network PID controller is shown in Fig. 3, it adds oscilloscope to convenient for tracking, acquisition and comparison.
Natural Gas Chemistry 17(2008), 409-414

They are tube body made up of grapheme slices seamlessly and mid-hollowly, each tubular layer is made up of carbon hexagon structure, similarly with graphite structure.
Special structure of carbon nanotubes attracted great concern from experts of physics, chemistry, materials, electronics, and other fields, and then a lot of research work followed up.
Carbon nanotubes have hydrophobic surface, larger specific surface area, strong reaction activity and abundant pore structure, so they have good adsorption capacity to heavy metal ions[2-3].
Further study showed that the adsorption performance mainly depends on their surface functional group [4] or complex, and through a change of their surface structure, and then the adsorption capacity can be improved.

Restoration Of Historic Concrete Structures With Modern Materials - A Case Study - Dipl.
Finger Institute for Building Material Engineering (FIB), Chair of Building Chemistry and Polymer Materials, Coudraystraße 11A, 99423 Weimar, Germany aalexander.gypser@uni-weimar.de, balexander.flohr@uni-weimar.de, c andrea.osburg@uni-weimar.de Keywords: concrete repair, concrete restoration, fair-faced concrete, PSCC, SPCC Abstract.
Today the requirements for concrete restoration are not only focus on the retrofitting or restoration of bearing capacity but increasingly also focus on preservation of historic structures, such as industrial monuments, civil engineering structures and buildings of the 60s.
Because of the demands on the concrete such as a structured and colored surface but also a high frost resistance and high impermeability the PSCC seemed well suited.
In spite of the positive results, this PSCC has the potential also for applications in a larger scale and with more structured formwork matrices.

The parameters of early structure forming process (including normal density and setting time) are studied.
Such phase is formed in the material during manufacturing process as a result of trapping the air, and also during structure formation process (contraction phenomena).
Obviously, the reactive additives are advantageous because they can interact with the hydration products of portland cement, resulting compaction of the final composite structure.
Inherent features of structure formation influence the compressive strength of the final structure of composite binder.
Yarusova, Synthesis and properties of calcium hydrosilicates in multi-component systems, Chemistry Institute of FEBRAS, Vladivostok (in Russian), 2010

The initial structure is relaxed up to 10,000 steps by the molecular dynamics calculation.
The normal stress is an average value for 1,500 steps of the structure relaxation of 3,000 steps.
The structure analysis is conducted by common neighbor analysis [7].
Criterion of Dislocation Emission Figure 5 shows the snapshots during the structure relaxation of ε = 0.032.
Andersen, Molecular Dynamics Study of Melting and Freezing of Small Lennard-Jones Clusters, Journal of Physical Chemistry, 91, pp. 4950-4963, (1987)

In this work investigation was carried out to find out optimum chemistry to have melting temperature of the alloy in the range of 1100-1200 °C without compromising the requisite mechanical and corrosion properties.
Beryllium addition also increases hardness of the NiCrMo alloy as it forms Ni-Be eutectic phase in the structure.