Advanced Materials Research Vols. 201-203

Abstract: Fluorescence optical-fiber temperature sensor based on Planck’s law is studied in this paper. Sapphire fiber is adopted as thermal probe. With steady physical chemistry performance, higher melting point, low loss in the waveband of 0.3~0.4 μm , sapphire fiber is very attractive for temperature optical fiber sensing and near infrared energy delivery. Making use of the method of FFT transformation to carry on measurement of fluorescence life time, the measured fluorescence life time can be obtained by tangent value of first non-zero phase angle. This method has virtues such as fast speed, small error and no background interference. Among the detection range from 0 to 450 , the thermometer has an average temperature resolution of 0.4°C .The experimental results show that the temperature measuring system can effectively decrease the influence of instability of light source and intensity variation in measuring channel on measurement results. This system also has advantages of high accuracy, very high temperature resolution, good dynamic response and immunity to the electro-magnetic interference.

Abstract: Digital simulation of stochastic wind velocity field is prerequisite to flutter or buffeting analysis of long-span bridges in time-domain. Wavelet method was applied to the simulation of the stochastic wind field, performing the effective simulation of spatial stochastic wind field. According to the idea of multi-resolution analysis and orthonormal wavelets, relationship between wavelet coefficients and PSD(power spectral density)function is deduced , then the wavelet coefficients on each and every scale are obtained from the given PSD function, the intermittency was introduced into wavelet coefficients while at the same time preserves the target spectral characters. As a result, the inverse wavelet transform is applied to generate stationary wind velocity history through the given wavelet coefficients. A numerical example to illustrate the application of the proposed method for the simulation of a bridge wind velocity field is provided.

Abstract: This paper proposed some improvement measures of Genetic Programming (GP) in data fitting, including developed new ways of crossover and mutation, improved the calculation efficiency greatly, and avoided the problem of parse tree expansion. The new adopted mutation method improved the problem of constant modification to some extent. Numerical simulation obtained a considerable good fitting and prediction precision.

Abstract: We took the surface sediments of the Yellow River as the objects to study the adsorption characteristics of Cu and Pb in coastal sediments. The results indicated that: the smaller the granularity is, the bigger the saturated adsorption capacity is; The adsorption equilibrium time of Cu²⁺, Pb²⁺ is different, but all can achieve adsorption equilibrium in 1.5h; The adsorption capacity increases gradually along with pH, which increases rapidly for Cu²⁺, but increaseing slowly for Pb²⁺. The adsorption capacity of Cu²⁺ assumes a linear relation with initial concentration of absorbent basically; which increases rapidly under lower initial concentration of absorbent for Pb²⁺, but then becomes lower. The adsorption capacity of Cu²⁺, Pb²⁺ increases along with the equilibrium concentration, which increases rapidly for Cu²⁺, but increases rapidly for Pb²⁺ when the equilibrium concentration is relatively lower, then tends to slow down along with the concentration.

Abstract: This paper introduces the working principle and components structure of a new kind rotary refrigeration compressor which receives the merits of some existing rotary refrigeration compressors and discards some application limitation. The new type refrigeration compressor has the characteristics of fewer parts as well as simple structure, easy manufacturing, smooth operation and wide application capacity. In this paper the author puts emphasis on the discharge structure, capacity regulation mechanism, piston flexibleness and seal body.

Abstract: Used seven different aldehyde besides salicylaldehyde, respectively, reacted with the amino acid in the ethanol ratio of 1:1 has prepared seven Schiff base;then used 2(2(4-chlorobenzeneyl) methyl)tin and 2(4-on cyanoacrylate benzylidene)2 chloride tin reacted with above seven Schiff base in anhydrous ethanol, has prepared a series of new organo tin (IV) Schiff base complexes . The synthesis process was used the new technology of microwave and all the compounds were characterized.

Abstract: The bore core method has used extensively in the field of asphalt pavement detection, maintains and final acceptance. Using the core’s evaluation index systems, the structural thickness, the disease range and the material grade of the road can be known and analyzed, as well as the attenuation of the key index of bitumen. The disease intensity of road surface and development trend in depth can be found out; the reason of the disease can be ascertained, through the compression strength, resisting and shearing mechanics indexes such as bonding strength, etc. Facts show that features in-depth analysis of bore core will help to identify causes of disease, and then adopt measures for improvement.

Abstract: The formula of surfactant(QY-3、SHSA-HN6、SS) and polymer compound system, and the interfacial characteristics between oil and water of Henan oil field were evaluated, the binary composite system formula adapt to the field was explored. The results show that the binary composite system (surfactant QY-3 and polymer 1630S) and oil-water in Henan can achieve ultra-low interfacial tension(＜10^-3mN/m); If the addition agent NaCl was added to the composite system (Surfactant Ss and polymer ZL-Ⅱ or Surfactant Ss and polymer KYPAM) that the interfacial tension between oil and water can be reduced effectively.

Abstract: In the reservoir condition of Liaohe oil field, the indoor physical simulation experiments of polymer / surfactant binary combination flooding and polymer / surfactant / alkali (ASP) flooding in the artificial cores have been conducted. The results show that enhanced oil recovery of polymer flooding is about 24.4%, by utilizing experiment project that polymer molecular weight is 19 million, main slug concentration is 1500mg/L. Binary flooding system that molecular weight of polymer is 19 million, main slug concentration is 1500mg/L, 0.3% surfactant YR has improved the oil recovery by 30.1%. The ASP flooding system (19 million 1500mg/L polymer +0.3% surfactant SS+ 1.2%Na₂CO₃) has improved the oil recovery by 28.4%. It can be seen that the binary flooding system is best.

Abstract: The draping and buckling of knitted fabric is simulated based on the micro-mechanical constitutive model with full Lagrange finite element method under gravity load. The micro-constitutive model reveals the mechanical properties of fabric more elaborately, especially fabric has its own properties owing to its micro-knitted structure. In the finite element analysis, the knitted fabric sheet is discretized with 8-node shell elements and reduced-integration method is used. The simulated results are in good agreement with the experimental observations. The work provides a theoretical and technical basis for the development of the virtual trial system of garments.