Advanced Materials Research Vols. 424-425

Abstract: In urban wetland ecological system plants are important components, and plant landscape is one of the themes of landscape in the urban wetland and it is even the basic support of wetland ecosystem. The paper takes China Yangzhou Sanwan Wetland Park as a case, starting from maintaining wetland system ecological balance to protecting wetland functions and biodiversity, and realizing the sustainable use of the resources. Based on excavating the culture resources in Yangzhou, it also comprehensively utilizes natural wetland resources, surrounding natural and humanity resources to make a cultural and green plants group. So that we can build an urban wetland ecological system with “rhyme” and “green field”.

Abstract: CARB bearing is a kind of compact aligning roller bearing with internal contact and slightly curved surface, which is the most important breakthrough of bearing technology in rencent 50 years. CARB bearing’s special structural design make it has unique advantages, for example, reducing the mechanical structure size, reducing cost, extending bearing life, reducing noise, improving radial load capacity and high temperature stability, etc, so it is widely used in the manufacturing industry. CARB bearing’s roller is cylinder with arc, this unique structure is suitable for adopting cold rolling technology

Abstract: This paper introduces that the designing of the solar energy - ground source heat pump integrated system aim at the ground source heat pump can not supply enough heat for cold regions at winter. The system performance analysis, application advantages and economic environmental benefits analysis indicate that the integrated application systems have significant energy-saving and environmental benefits.

Abstract: The experiment on adding rare earth elements doped in diamond matrix composites is made. Based on the doping of rare earth in metal powders including tungsten carbide, iron and nickel, Co is entirely replaced by Fe with rare earth in diamond matrix composites, and the process route of rare earth doping is indicated. The related performance of is measured, and the results obtained show that the bending strength, the hardness and the impact ductility of Fe matrix composites with rare earth are improved. The practical service performance of Fe matrix composites with rare earth has reached up to the practical service performance of Co matrix, and bearing good practical service performance, low price, have made corresponding diamond tools.

Abstract: In building, the energy consumption of heating, ventilation and air conditioning (HVAC) is the largest, which accounts for forty to sixty percent of the total building consumption. So it is a key research to reduce the energy consumption of the HVAC system for saving building energy. This article describes a variety of energy conservation equipment of HVAC, and describes in detail the principles of each type of equipment. This article also analyzes the growing advanced control technologies for the HVAC system. In conclusion, HVAC equipment is developing in the direction of clean energy and energy efficient; intelligent control technology is more applicable to the varying parameters of complex system such as air conditioning, is more energy conservation and will become the leading direction of research and application

Abstract: The external and internal wind pressure distribution characteristics on the roof surface of a low-rise gable-roofed building with wall openings are studied by means of the numerical simulation technique. The validity and accuracy of the numerical simulation is first demonstrated by comparison with the existing full-scale experimental results. In order to investigate the effect of wall opening locations on the pressure distribution, a parametric analysis is carried out to a typical gable-roofed building with different wall opening conditions. The analysis results indicate that wall opening locations have no significant effect on the external wind pressure but have considerable influence on the internal wind pressure. The cases of two opposite wall openings appear to be more favorable than those of single front wall openging for wind resistance of the building roof, if the angle of approaching wind flow from the inner normal line of the front wall is smaller than 90°.

Abstract: The paper derived and gave the mean square deviation formula relating to the internal variable (chemical reaction progression variable) fluctuating of the linear non–equilibrium local system, and also rendered the condition of the stability. Furthermore, It discussed the related relations among the corresponding mean square deviation, the detailed equilibrium equation, the relax time and other thermal mechanics variables

Abstract: It is more difficult and sophisticated to analyze the humanoid kinematics than the common industrial serial manipulator’s because of its high number of DOF, complex model, and balance constraints. Taking the advantages of the characteristics in the configuration of leg’s joints of humanoid, based on the screw theory, according to the trajectory planning of the center of mass and the feet, a method is proposed to solve the kinematics of humanoid’s legs using Paden-Kahan sub-problems approach. The solving process indicates that the mathematical modeling is of simpleness and briefness, while it is of convenience to solve the inverse kinematics

Abstract: Effect of the natural non-ionic surfactant Tea Saponin on hydrolysis of furfural residues by cellulases from Trichoderma pseudokoningii and Trichoderma koningii was assayed. Glucose concentrations released by T. cellulases were 4.16 g/L and 1.92 g/L, respectively. The contents increased to 13.77 g/L and 6.23 g/L in the corresponding digests with addition of surfactant (12 g/L). Glucose yields were enhanced to 52.54% and 34.16% with the surfactant concentrations of 10.5 g/L and 12 g/L, respectively. The results indicated that Tea Saponin was beneficial for hydrolysis of furfural residues. Tea Saponin could maintain surface tension in a low level even it was hydrolyzed by cellulases, suggesting that the surfactant was suitable for lignocellulose saccharification industry.

Abstract: Research focused mainly on Fe-based matrix composite (the wrapped diamond), used Fe powder to replace the expensive cobalt powder (Co-based matrix composite), and add the rare earth (RE) elements to reinforce the related physical properties of this Fe-based matrix composite for diamond tools. Conducted on the related matrix composite differential thermal analysis (DTA), in particular Fe-based matrix composite containing 35% iron powder (with RE or without RE) Were discussed for DTA and the package insert forces. DTA and the analysis is consistent with the empirical formula. By hot pressing the composite with diamond as the research object, having researched the relationship among the heat capacity (CP) at constant pressure and other related physical parameters （the package inserts force and E etc.）. Take 35%Fe-based powder composite materials for diamond tools (with RE or without RE) as the research objiect, combining analysis of the problem for the porosity, and the densification, and the package inserts force, and the DTA tests, which the addition manner of rare earth, add form , and quantity are determined, so that the changes laws of DTA curve and heat capacity (CP) of Fe-based composite containing 35% iron powder( with the RE) are similar to the that of pure Co composites. Apply these laws to improve the hot pressing technology and mechanical properties of the diamond tools (bending strength, impact toughness, hardness and porosity) and so on