Advanced Materials Research Vols. 919-921

Abstract: An high performance two-component structural anchor adhesive based on vinyl ester resin is synthesized by adding the toughener to improve the material brittleness and bringing in chemical heat source to reduce the affection of the environment on chemical reaction and it can be cured in the damp or in the environment with water by adding the water-absorbable filler.Compound stabilizer consisted of inhibitor and oxalic acid improve the stability of the pro-accelerated vinyl ester resin.The adhesive exhibites high-early-strength developing, excellent bong strength with “can’t dry”substrate and can cure rapid in lower temperature.it allows construction crews to install threaded rod or rebar in concrete that is too damp or soaked to bond with other adhesives.

Abstract: This experiment synthesize ​​a rare-SO₄^2-/ZrO₂ solid acid catalyst, and investigate the optimal reaction conditions for the catalytic reaction of the catering waste oil and methanol reaction which is preparation for biodiesel. Under a condition of alcohol oil molar ratio of 9:1, a catalyst amount of 4 %, reaction time of 8 h, and reaction temperature of 240°C, more than65% of biodiesel yield was obtained. Each performance index of the Biodiesel can reach the standard of similar foreign products, and the prepared catalyst has good reusability.

Abstract: Ag₂Se nanocrystal was successfully prepared by ultrasonic synthesis in water and ethanol systems at an ambient pressure. The powder of selenium was used as the selenium ion source. The size of the nanocrystals is in the scope of 10-20nm. The products were characterized by some means including X-ray Powder Diffraction (XRD) and Transmission Electron Microscopy (TEM) which was used to study the thermostability of the product. The result of the experiments indicated that the concentration of the reactant, the pH of the solution, the react temperature and the surfactant had some important influence on the formation and the size of the Ag₂Se nanoparticles. The method we reported here is proved to be a new and an easy way to prepare the nanocrystals of metal chalcogenide.

Abstract: Now, the way to access the database in most still uses a simple keyword query method, it is generally based on semantic matching, rather than based on semantic matching. So it can't make full use of the semantic relationship between the data, and unable to obtain accurate results. This paper proposes a keyword query method based on digital type, it can largely improve the efficiency of user queries. We propose two query algorithm namely multi-table query and single table query in the database query time of uncertainty. Through experimental analysis, we can see that our algorithm is more effective than simple type keyword queries.

Abstract: It is common method that using landform key points and lines of landform to draw contours of large scale relief maps. In this paper ,It is discussed that using lamella analogue to draw contour of large scale relief maps is an another simple utility high effective method.

Abstract: To meet the demands of high precision and real-time navigation calculating of some tiny volume projectiles in engineering, a kind of FPGA + DSP architecture hardware calculating system is designed. It transmits motion and attitude information through the wireless transmission and displays the messages on upper computer. In the system, FPGA is the kernel controller, which is used to control all timing logic, start the DSP calculating and transmit the wireless data of navigation information and data acquisition of micro inertial measurement unit (MIMU). DSP as a processor for navigation algorithm, calculates the navigation parameters and transmits the result to FPGA. This design system has the characteristics of low power consumption, small volume and high flexibility. It can collect MIMU data, transmit wireless data and display navigation information on upper computer. The experiment proved that the method is feasible

Abstract: The paper presents a method to build MMG model of ship motion for a oil supply vessel (OSV) with dynamic positioning system. It is assumed that the ship motion exposed to environment disturbances like wind, wave & currents, The simulation results show that the model of the vessel and environment disturbances are suitable, and the method is practicable .

Abstract: Visual image, as a kind of rich content and performance of multimedia information, has been tremendously popular for a long time. Using text-based Image Retrieval TBIR (Text-based Image Retrieval, TBIR) during retrieval will provide keywords and description of the image text matching, operation simple and quick. The defects of TBIR also, however, there are the following: (1) image library image all the need for manual annotation, time-consuming and laborious with subjective factors; (2) image semantics is rich, simple key words cannot fully express its meaning and accurate. Image Retrieval Based on regional RBIR (Region-based Image Retrieval, RBIR) first of all, by using image segmentation method, divides an image into several different regions. At last image matching is converted to match between the regions. We just need to user submits a retrieval image, greatly reducing the user's retrieval burden.

Abstract: Soil mechanics is based on mechanics, researching characteristics of soil. It include the calculation of deformation and stability of soil. The consolidation experiment is an important method for the determination of resistance to deformation and strength of foundation soil. We can know the compressibility and compression modulus of the soil by the experiment. In order to ensure the economy and safe of the structure, we calculate the final settlement using the elastic theory method and foundation specification method. Base on the experimental teaching platform of geotechnical experiment microcomputer data acquisition system, student can master steps of consolidation experiment. Besides, it can mobilize students’ seeking knowledge desire and profound understanding value of course.

Abstract: The paper presents the results of research aimed at understanding the deep removal of phosphates from household wastewater. Provides a method for deep cleaning of waste water using reinforced material. The most complete removal of phosphate is achieved when using the technology without a return activated sludge. Displaying activating effect of reinforced material to the biological treatment process of organic pollution. Were obtained coefficients of the activation of the biological process with reinforced material.