Advanced Materials Research Vols. 287-290

Abstract: This article mainly introduces the design thought of Siemens PLC applying for the production of traditional Chinese medicine. In addition, the design and investigation on constant temperature and pressure of a new automatic traditional Chinese medicine dripping machine is introduced in this paper also. The automatic traditional Chinese medicine dripping machine is wholly controlled by the Siemens PLC. Recent application on spots shows: this PLC controlling system works reliably, operates conveniently. 【 Key words 】 traditional Chinese medicine; Siemens PLC; constant pressure; constant temperature

Abstract: Results are summarized of feasibility of using model for description of exfoliation corrosion (EC) in modeling of structural degradation of AlCu4Mg1 (Al2024) on extruded stringer type specimens in EXCO solution for different times of exposure. The effect of time for time development of this localized form of corrosion was assessed by using the approach of Robinson. Briefly, this approach makes possible description of intergrannular penetration observed under blisters formed by voluminous corrosion products. However, intergrannular stress supposed to be resulting from the expansion of corrosion products along dissolved grain boundaries is not taken into account in this model. Possible application of concept of intergrannular stress incorporation into EC model is discussed for modeling of structural degradation of Al2024 in EXCO tests.

Abstract: Gas quenching steel slag (GQSS), which was prepared by gas quenching equipment under inert atmosphere, possessed some advantages for pollutants removal from wastewater. Static state experiment has been carried on to investigate Cr(III) removal from wastewater by GQSS. The results indicated that solid-liquid ratio, Cr(VI) original concentration, libration time and dissolved oxygen have significant influence on Cr(III) removal percentage. Take economic cost into account, the ratio between the mass of GQSS and the volume of Cr(III)-bearing solution should be controlled at 3:100. Because Cr(III) removal from wastewater by GQSS went through absorption and precipitation, the removal percentage of Cr(III) increased gradually with the reaction time. Moreover, Cr(III) removal percentage declined with the increasing of Cr(III) original concentration. Along with the declining of dissolved oxygen under sealed with lid, the redox potential in the solution decreased, and then the removal percentage of Cr(III) increased.

Abstract: Azo dyes have strong hydrophilic and good adhesion to solid surface. In this study, 23 kinds of typical azo compounds were tested as depressant of sulfide minerals. Absorption of azo compound on mineral surfaces was detected by UV. The result shows that some of them can be good depressants of single sulfide minerals. With the number of azo group increasing from 1 to 3, depression performances are improved. On the other hand, depression performances of azo dye are related to the type of group and the location of phenyls，the results of adsorption and the frontier molecular orbital energy calculation may be used to explain depression performances of azo dyes.

Abstract: A new strategy of preparing the efficient CO₂ adsorbent without further molding is reported in this article. This novel shaped CO₂ capturer is obtained by coating amine on the SBA-15 monolith with a specific 3D net-linked morphology that favors the accessibility of amine guest in the channel. The resulting composites are characterized with XRD, N₂ adsorption, SEM and TEM techniques, and their adsorptive ability is assessed with CO₂-TPD test, offering a high adsorption capacity of 144 mg g^-1and stable cyclic adsorption-desorption performance for potential application.

Abstract: Electroplating was employed to prepare Cu films and Ni films on Ag substrates. The average internal stresses in Cu film and Ni film were measured in situ by cantilever beam test. The values of experimental internal stresses were compared with theoretical internal stresses. The results showed that the internal stresses of Cu film and Ni film decreased with the increase of the film thickness. The reduced gradient was faster. The values of experimental and theoretical internal stresses had the same variation trend with film thickness and the same characteristics (tensile stress). Theoretical calculation model of internal stress was of accuracy. The internal stress for the same substrate was in relation to the film material.

Abstract: The properties of offset paper and art paper including smoothness, gloss and absorbability, dot percentage and the tri-stimulus values of every dot areas and solid areas of the printed paper samples were measured. Dot gain curve and chromatic diagram were drawn after dot gain values and chromatic coordinates (x, y) were calculated. The results showed that smaller dot gain value and greater color gamut occur on the art paper due to its higher smoothness, gloss and lower absorbability when the printing conditions were the same, so the printing dot reproduction quality on the surface of art paper is better. However because offset paper has lower smoothness and gloss, higher absorbability compared with art paper, therefore the dot reproduction quality on offset paper is not as good as art paper.

Abstract: Un-promoted and promoted Co/SiO₂ catalysts with ZrO₂ and Ru were prepared and the catalytic performances for Fischer-Tropsch synthesis were investigated. The prepared catalysts were characterized by XRD, N₂ adsorption/desorption, and X-ray absorption techniques. XRD suggested that the cobalt species presence in all prepared catalysts was Co₃O₄. Promoted catalyst with ZrO₂ and Ru showed high distribution of cobalt on silica surface resulted in smaller Co₃O₄ crystalline size than un-promoted ones. From the reaction testing, the obtained products of C₁ to C₉ from un-promoted and promoted Co/SiO₂ were studied.

Abstract: The microstructure and properties of brazing weld of 3003 Aluminum Alloy has been studied by using the methods of microstructure observation(SEM), and mechanical-ability was tested. The results showed that the tensile strength reaches 146.2MPa which is close to that of the parent metal. The metallographic structure is α(Al) and α(Al)+Si eutectic structure. The metallographic structure affect the tensile strength and rigidity of the weld joint.

Abstract: The anti-swing problem of the bridge cranes is discussed. The position and anti-swing control strategy based on BVP arithmetic is presented. The position and anti-swing control programming of bridge cranes can be transformed into the two-point boundary value problem (BVP) of nonlinear systems. According to the boundary conditions, the tractive force function of Fourier series form with free parameters is constructed. The BVP is solved with the bvp4c function in Matlab toolbox, and the tractive force sequence is obtained. The presented position and anti-swing control strategy for bridge cranes belongs to open-loop feedforward control essentially. The simulation of anti-swing and position control process illustrates the effectivity of the control strategy.