Advanced Materials Research Vols. 466-467

Abstract: He development effect of steam soak well is influenced by the combination of the following parameters: injection speed, dryness fraction of steam, cyclic steam injection volume, soaking time and bottom hole flowing pressure. Take the advantage of annealed genetic algorithm which characterize with the traits of fast search and globally optimization. Based on the mathematical model of the output of the steam soak well, and optimize injection production parameter of the steam soak well which is aimed at the cycle average daily profit maximum, and make the field application.

Abstract: Phthalic anhydride switch condenser was imported, failure occurred many times after put in use. There are ellipsoidal winged tubes in them and the holes on tube sheet are ellipsoidal too, which is very difficult to manufacture. Established mathematics model, analyzed the mathematic relation, compiled NC program, realized the numerical controlled process of ellipsoidal hole on MITSUBISHI MCV-1700 machining center, and realized domestic manufacture of phthalic anhydride switch condenser. Analyzed the error of process and selected proper cutter too. Machining center was imported in 1990’s, which CPU is only on 80386 levels, when the NC program is complex, the velocity of calculate will lower than the feed of end mill. The program is compiled with EIA code, which is difficult for most of engineers, took a common PC as program editor to compile program with Quick BASIC, then more technicians can compile program. This improved the procession of process and enlarged the range of machining center.

Abstract: Chiral side-chain liquid-crystalline elastomers (LCEs) IP~IVP containig menthyl groups were synthesized by a one-step hydrosilylation reaction. The chemical structures and LC properties of the monomers and polymers were characterized by use of various experimental techniques. The effect of crosslinking mesogens on mesomorphic properties of the chiral LCEs was studied by swelling experiments. All the samples IP~IVP showed cholesteric mesophase when they were heated and cooled, proved by visual observation and X-ray measurements. The glass transition temperature (T_g) of elastomers increased slightly with increase of crosslinking mesogens in the polymer systems, but mesophase-isotropic phase transition temperature (T_i) decreased slightly, suggesting that the temperature range of mesophase became narrow with increase of crosslinking mesogens for all the elastomers. The maximum reflection bands shift slightly to long wavelength and become broad at the same temperature, indicating that the helical structure is partially disrupted because of both the constraint of chemical crosslinking agents and the different mesogenic units.

Abstract: The article aims at the problems such as the traditional contract nets model’s communication traffic is too heavy in the consultation process; task’s partition is fixed; evaluation index is not comprehensive, proposes a contract nets improvement method based on the bidding threshold and evaluation function by combining the response threshold model of the ant colony algorithm. This method introduce fuzzy synthetic computation, finding the potential cooperation relations between node agents, bottom-up decomposing the complex task, effectively reduce the negotiation time and communication flows, improve the efficiency of the system. The thesis combines wood drying application feature, and puts forward the improved model’s experimental simulation in wood drying kiln. The result shows that the improved method can effectively improve the performance of the Contract Net Protocol in large-scale multi-agent system. It provides technical basis for the realization of wood drying cluster control.

Abstract: Functionalized chitosan (CS) were widely used as drug delivery system in the chemotherapy of various disease. In this work, folate (FA) was conjugated into chitosan molecular as targeting ligand based on Schiff reaction between –NH₂ group of CS and –COOH group of FA. And nanoparticles were made by emulsion method with vanillin novel cross-linking agent. The FA modified CS and its nanoparticles were characterized by Fourier transform spectroscopy (FT-IR), scanning electron microscope (SEM) and Zeta potential. SEM results confirmed the nanoparticles made from FA-CS conjugate were spherical in shape and were about 100 nm in size. Zeta potential analysis revealed that the nanoparticles were negatively charged with charge density of -7.73mV.

Abstract: A new heterogeneous Fenton-like catalyst of Fe/S/GAC was prepared by granular activated carbon (GAC) soaked in solution of (NH₄)₂S₂O₈ and Fe(NO₃)₃. The effect of the concentration of (NH₄)₂S₂O₈ , Fe(NO₃)₃, drying temperature and different catalysts on the catalytic reactivity of catalyst was discussed. The removal rate of Orange IV was used to express the catalytic reactivity of the catalyst. The prepared catalysts were characterized by X-ray diffraction (XRD), specific surface area (BET) and scanning electron microscopy (SEM). The removal rate of Orange IV followed second-order kinetics. The catalyst of Fe/S/GAC has higher catalytic activity than that of Fe/GAC.

Abstract: Reactions of (R₃Sn)₂O (R=Ph, 2-ClC₆H₄CH₂, 2-FC₆H₄CH₂, 4-CNC₆H₄CH₂) with 5-chloro-6-hydroxynicotinic acid in 1/2 stoichiometry yielded eight triorganotin compounds. These compounds have been characterized by elemental analysis, IR and NMR spectroscopy. The crystal structures of triphenyltin esters of 5-chloro-6-hydroxynicotinic acid were determined by single crystal X-ray diffraction. In the compound, the tin atoms are rendered five-coordinated in a trigonal bipyramidal structure by coordinating though the three phenyl carbon atoms and two oxygen atoms one from carboxylate and other from the phenolic hydroxide. The resulting structure is one-dimensional linear polymers through an interaction between the O atoms of phenolic hydroxide and tin atoms of an adjacent molecule.

Abstract: This paper introduces the basic performances of the multi-agent system. And according to the wood drying kiln distributed characteristics and the actual requirements of the wood drying factory, apply Multi-Agent System to the control of the wood drying; establish a multi-agent control system with the hierarchical control method. The system efficiently achieves the distributed control environment of the wood drying. And discuss about the real-time agent’s hardware structure in detail. Meanwhile apply the fuzzy theory to real-time intelligent agent’s software algorithm. And use it on the simulation experiment. Experimental results show that this method can improve the overall efficiency of the system. Application with this method in wood drying control is advanced.

Abstract: In order to meet the requirements of electro-hydraulic proportional controller interface in embedded system, a GUI design method based on Qt Embedded is developed in this paper. Furthermore, the vital techniques, including installation, design, are analyzed in detail. This GUI system is employed in the embedded electro-hydraulic proportional controller. It shows the graphical user interface is friendly with stable performance.

Abstract: The U-shaped cracking of high-grade semi-rigid base asphalt pavement was studied. A finite element program (ABAQUS) was used to conduct a mechanical model to analyze the effects of the interlayer conditions and overloads on U-shaped cracking. The results show that the generation and development of U-shaped cracking is significantly influenced by interlayer conditions and overloads. Furthermore, the asphalt-to-asphalt pavement layer conditions provide for a more remarkable effect on U-shaped cracking than the asphalt–to-base pavement layer conditions. To reduce the development of U-shaped cracking, two aspects work must be reinforced: (1) the interface conditions should be improved to ensure the shear strength between layers of surface course and avoid slippage failure between layers of asphalt pavement, (2) over loading vehicles must be limited.