Advanced Materials Research Vols. 204-210

Abstract: A sea source adsorption heat pump system driven by steam was put forward in this paper. A mathematic model of the system was established with thermodynamic method by appropriate assumptions.Three parameters were chosen for analysis the system.The results shows that the lower heating temperature,higher sea water circulation temperature and steam pressure will improve the system parameters especially on the conditions of low te and high tc. It may be very useful for design and operation of the absorption heat pump system driven by steam.

Abstract: : It is estimated that more than 500,000 industrial boilers (mostly stoker-fired) in China consume over 400 million tons of coal per year. Because of low efficiency (only 60-65 percent) of industrial boilers, the energy consumption and pollution emissions from industrial boilers rank second place in China’s industry. On the other hand, China is rich in bamboo resource, and bamboo forest area is more than 5 million hectares, and occupies more than 1/4 of the world’s total. However, the common utilization rate of bamboo timber’s physical processing is below 40% in weight, over 60% of bamboo timber becomes left over when processed. Bamboo wastes, compared with coal fuel, are a very clean and renewable and sustainable energy. Therefore, there is the requirement that coal fired industrial boiler change its fuel into bamboo wastes in China, and some suggestions for bamboo fired boiler are presented in this paper. It is well economy of bamboo fired boiler in the region of China where an abundance of bamboo wastes disposed.

Abstract: With potassium acetate as an intercalation agent, kaolinite-potassium acetate(KAc) intercalation complexes was prepared. Afterwards, nano-kaolinite was successfully made through exfoliated intercalation complexes using power ultrasonic. The intermediate and final products were characterized by X-ray diffraction(XRD), infrared spectroscopy(IR), laser particle size analyzer, and scanning electron microscope (SEM). The results show that intercalation of KAc into kaolinite resulted in a crystal space expansion, from a basal spacing of 7.14Ǻ to 14.20 Ǻ, and the intercalation rate was about 80%. KAc intercalation causes the weakening of interlayer stability. It was shown that the particles of nano-kaolinite is very thin lamellar in shape, whose average thickness, average particle size, are 50 nm and 450 nm respectively.

Abstract: This study focuses on the power efficient localization by fingerprinted KNN algorithm in the indoor wireless local area network (WLAN) environment. To the best of our knowledge, although the fingerprint algorithm has been utilized to supply some special location based service (LBS) with high precision and accuracy, these associated location systems have resulted in significant energy consumption. Therefore, serious attention should be paid on the energy consumption because of the hundreds to thousands of access points (APs) with high-density deployed in our university campuses and corporate offices. In response to this compelling problem, we discuss the relationship between energy costs and radio map-based location performance for the Gaussian radio signal strength (RSS) distribution with different neighboring points in KNN. Furthermore, using our results, the guidelines on the power efficient fingerprint location algorithm is also provided.

Abstract: IN a Clifford Wireless Sensor Network, We aimed to extend network lifetime while maintaining a high quality of service. In this paper we researched the Geometric algebra capacity theorem of the connection map of the 3-D Clifford sensor network model on the basis of ref [1]. Then we proposed Clifford Sensor Network Connectivity-Coverage Energy Consumption Algorithm (CSNCCECA) under the principle of nearest direction. This algorithm can efficiently utilize energy by building an efficient connection map of the WSN. Finally we tested and verified the rationality of the algorithm. The experiment results show that SDECA based on Shortest-Distance is exceeded by CSNCCECA as demonstrated in fig. 4.

Abstract: This paper mainly analyses the force state for upper telescopie prop, down telescopie prop and cylinder of double-telescopie props for hydraulic supports. It builds up the mathematic model for accounting intensity of double-telescopie props, and presents the calculating method of accounting intensity for double-telescopie props.

Abstract: A lot of reinforced concrete (RC) frames have being collapsed during Si Chuan Earthquake (SCE) in western China May 12^th.2008, at the same time others have being injured on several levers. In recent years how to evaluate reliability and fragility of the buildings and search reasonable design practice of seismic strengthening of these buildings is urgent mission. One goal of fragility analysis is set up relation between vulnerability and seismic intensity. A set of stochastic earthquake waves compatible with the response spectrum of China seismic code selected to represent the variability in ground motion. Dynamic inelastic time history analysis was used to analyze the random sample of structures. In the end structural weak position also be pointed as valuable consultation for diagnose these buildings and fragility curves of typical middle-storey RC frames of China was obtained finally.

Abstract: Economically affordable housing (EAH) system is aimed to resolve the housing problem for people without housing or poorly-housed families. However, driven by the economic benefit, increasing homebuyers ineligible to purchase EAH provide fake materials to acquire EAH, which makes EAH system deviate from its original aim. In the paper, we put forth the critical value of surveillance intensity by the government through the game analysis on the government and the fraudulent purchasers and conclude that the fraudulent purchase can be effectively controlled as long as the critical value is satisfied. Based on this, punishment measures and intensities for the fraudulent purchase are surveyed and quantified, and thus come up with the various supervision and surveillance intensities needed by the government for each punishment measure. This provides a theoretical basis and quantitative standard for the government to formulate an effective management system.

Abstract: A promising adsorbent for CO₂ removal was prepared by introducing methyl-diethyl-amine (MDEA) into mesoporous silica SBA-15 using impregnation method. The MDEA modified adsorbents were characterized by X-ray powder diffraction (XRD) and nitrogen adsorption/desorption. Surface area, pore size and pore volume of MDEA-modified SBA-15 adsorbent decreased with the increasing of MDEA loading, while the loaded MDEA could not change the structure of the adsorbents. The adsorption performance of CO₂ on the adsorbents was conducted in a dynamic setup. Dynamic adsorption performance changed with change of the amount of loaded MDEA. In addition, not only the adsorbent was regenerable by purging with the purified gas, but also the adsorption performance is stable in adsorption cycles. The results indicated that the MDEA modified adsorbents were novel for removing CO₂ for biogas upgrading.

Abstract: Adsorption equilibrium data for CO₂ and N₂ on coal-based activated carbon were obtained at 323.15, 348.15, 363.15 K and at partial pressures from 100 Pa to 82425 Pa by a volumetric apparatus. Lower temperature is helpful for the adsorption. It was observed the saturation loadings at 323.15 K are 0.3 mmolg^-1, 0.057mmolg^-1 for CO₂ and N₂, respectively. The Langmuir and Sips equations were used to correlate the experimental data. It was found that the Sips equation is more accurate to describe the adsorption behavior of both gases on activated carbon. Henry’s constant was calculated, it proves that activated carbon has a high selectivity on CO₂ than N₂, the maximum separation index is 5.5.