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A mathematical model of diesel engine The working process of the diesel engine cylinder is very complex, it includes physics, chemistry, flow, heat transfer and mass transfer.
But as a result of diesel engine overall structure is complex, fully in accordance with the physical modeling is very difficult, and in order to save computation time, under the premise that  does not affect the simulation results ,the entity structure is simplified handled: intake and exhaust stroke of the initial conditions, boundary conditions given by experimental test.
Fig. 1 Reducing combustion chamber model of the grid The calculation results According to the actual engine structure by establishing the model grid, eventually it can be able to get accurate results, such as NO, CO, the smoke particles quality as well as the pressure in cylinder and so on.

A Study on Linseed Oil Modified Waterborne Polyurethane Coatings CHEN Jianbing1,2,a, GUO Qiang*1,b, SUN Jinliang1,c, SHAO Xianli1,d, and NIE Zhijun1,e 1 School of Materials Science and Engineering, Shanghai University, Shanghai 201800, China; 2Department of Chemistry and Food Science, Chizhou College, Chizhou 247000, China *The corresponding author, aE-mail:chjb8008@163.com, bE-mail: guoq@shu.edu.cn cE-mail: aliang19386@163.com, dE-mail: shxl1986@163.com, eE-mail: niexg2010@163.com Keywords: coatings; waterborne polyurethane; linseed oil; ammonolysis.
The influence of reaction time and temperature of the linseed oil ammonolysis on structure and properties of the waterborne polyurethane coatings was investigated and discussed.
It has been shown in this work that the preferred ammonolysis temperature would be 102~118ºC, the reaction time could be about 80 min, and structure of the modified waterborne polyurethane was analysed by FTIR.

The calcined samples exhibited a hexagonal wurtzite structure.
In this study, the crystal structure of the samples was carried out by the X-ray diffraction (XRD) method (X’Pert MPD, Philips).
Results and Discussion Structural Study The effect of (PEO)128-(PPO)54-(PEO)128 concentrations on the crystal structure and crystallite size of the samples was studied by XRD method.
From Fig. 1 (a), it was observed that the diffraction peaks of all samples exhibited a hexagonal ZnO wurtzite structure according to the JCPDS card number of 36-1451.
The XRD patterns of all La-doped ZnO nanoparticles exhibited a hexagonal ZnO wurtzite structure corresponding to the JCPDS card number of 36-1451.

X-ray diffraction and TEM studies showed that boron nitride obtained from this system possess tetragonal structure.
Nonetheless, several renewed interest in its chemistry and processing, and demands have appeared for fibers, coatings, and foams that cannot be obtained by classical high-temperature powder preparation methods [1].
Regarding the structure of the boric acid-urea condensation product (polyborate ester), the details have not been clarified yet.
However, the following proposed structure is usually accepted.
From the IR and NMR spectra the above structure of the polyborate ester has been proposed.

The chemical structure of the product was identified by Fourier transform infrared spectroscopy (FTIR).
Chemical structure characterization.
FTIR was used to identify the chemical structure of the product.
Results and discussion Chemical structure of the product.
Development of fine chemicals from Chinese gum oleoresin, Chemistry and Industry of Forest Products, Vol.14, No.1(1994), p.68-73

Morphologies and structure.
This means that the MA process does not change the structure of MoS2.
This is due to the special layer structure of MoS2.
The structure of MoS2 does not change after MA.
Coordination Chemistry Reviews, 224(1) (2002),p87 [10] Du G, Guo Z, Wang S, et al.

The results show that due to the effect of supercritical CO2 on coal like physi-chemistry, the porosity of coal was changed, which markedly varied the permeability of coal samples before and after the effect of supercritical CO2; the permeability of the experimented coal samples was significantly higher than before, and average permeability increased by nearly an order of magnitude under the same volume-stress.
The structural principle diagram of super-critical CO2 effect on the coal samples are shown in Fig.2. 1: Gas collection device; 2: product separation device; 3: enclosed pressure gas bottle; 4: high-pressure CO2 gas bottle; 5: CO2 gas supplement bottle; 6: extraction experiment reactor; 7: CO2 preheating and insulation device; 8: gas accumulator flowmeter; 9: temperature sensor Fig.2 Supercritical CO2 extraction system structure of experiment The experimental equipments for the permeability of the coal samples are triaxial permeability testing system developed by ourselves.
When the volume stress was increased to a certain value, the solid skeleton of coal began to shrink, the porosity and gap structure formed from supercritical CO2 role gradually closed, and the effect of volume stress on coal permeability began to surface.

Fabrication of Organic/Inorganic Hybrids by Infiltration of Commercially-Available PLGA into Porous Hydroxyapatite Ceramics and Its Material Properties Naoki Osada1, Yusuke Shigemitsu1, Masashi Makita2, Kazuya Oribe2 and Mamoru Aizawa1,a 1Department of Applied Chemistry, Graduate school of Science and Technology, Meiji University, 1-1-1, Higashi-mita, Tama-ku, Kawasaki 214-8571, Japan 2Showa Ika Kohgyo co. ltd., 8-7, Hanei-nishi, Toyohashi, Aichi 441-8026, Japan amamorua@isc.meiji.ac.jp Keywords: Hydroxyapatite, PLGA, Porous ceramics, Organic/inorganic hybrids Abstract.
The porous HAp ceramics with bimodal pore structure have been fabricated from apatite fibers synthesized by homogeneous precipitation method.
This porous HAp ceramics have highly-interconnected pore structures.
Therefore, porous HAp ceramics have highly-interconnected pore structure with macro- and micropores.
This slightly-decreased total porosity suggests that the highly-interconnected pore structure of the porous HAp ceramics will be maintained still after infiltrating PLGA into porous HAp ceramics.

Preparation and Swelling Properties of Organoclay/Super-absorbent Resin Using Polyacrylonitrile Fiber Wastes Rufeng Cen a, Kunyan Wang b* and Wenwen Shu c Department of Materials Chemistry, Huzhou University, Huzhou, 313000, China acrf001@163.com, bwkyan01@163.com, cwws@163.com Keywords: polyacrylonitril, organoclay, super-absorbent resin Abstract.
The effects of OMMT content on the chemical structure and degradation of the super-absorbent resin were investigated.
The effects of OMMT loading on the molecular structure of the super-absorbent resin and the thermal degradation were confirmed by FTIR and TGA.
Results and Discussion Chemical structure of OMMT/Super-absorbent resin.The FTIR spectra of super-absorbent resin and OMMT/super-absorbent resin composite were shown in Fig.1.
FTIR was used to confirm the molecular structure of the OMMT/super-absorbent resin.

The perovskite structure CaCu3Ti4O12 (of CCTO) ceramics has giant permittivity, low dielectric loss, good thermal stability and dielectric constant in a wide temperature range has very broad application prospects in microelectronics.
It is the recent decades, developed a range of domestic and foreign capacitor and battery chemistry between the two new energy storage components.