Advanced Materials Research Vols. 179-180

Abstract: Fast-paced city life, people have no time to make friends by traditional methods. Appreciated when we encountered a stranger in the public place, but do not know each other, we have no effective way to understand each other.The study survey on making friends behavior,research on the 3G mobile application development technology, put forward a more immediate and more private mode to making friends. Propose out a mobile instant messaging software using Bluetooth technology blueprint. The study opened up a more direct and open innovational making friends mode compared with the other online instant messaging software. The study is innovative and has significant commercial value. The obtained theory and experience can be a meaningful reference to other studies in relevant fields.

Abstract: Regenerated cellulose/polyvinyl alcohol (PVA) blend membranes were prepared from a solution of cellulose and PVA in an ionic liquid of 1-allyl-3-methyimidazolium chloride (AMImCl). SEM images showed that the phase separation on the mixture was severely formed when the content of PVA was higher than 10% by volume. However, when the content of PVA in the mixture was lower than 6%, the cellulose and PVA were well-distributed. The regenerated blend membranes using the AMImCl presenting reasonable crystallinity were superior to those of regenerated pure cellulose membrane. In conclusion, the compatible properties of blend membranes from regenerated cellulose/PVA (6%) were improved and the blend membranes kept original biodegradability.

Abstract: In order to resolve automatic measurement, automatic monitoring and control of heat energy, a new type IC Card heat energy meter with automatic monitoring and control is designed. Software and hardware design of the heat instrument is introduced. Solutions of these problems are proposed throng analysis of engineering design problems. Lower power consumption and high precision requirements of heat measurement are met by collecting lower consumption components and intelligence design manners. Automatic measurement, monitoring and control functions are realized through gathering heat parameters of end-users on time, and analysis, comparing on the gathered data and data from standard meter by microcomputer. Preliminary tests show that the heat energy meter has functions of high precision, lower power consumption, strong intelligence and can achieve automatic Measurement, automatic monitoring and automatic control.

Abstract: Many defects relative to stress occur during the complicate casting process, such as hot tearing, residual stress concentration and distortion. Modeling of casting thermal stress during casting solidification process is of great significance to predict and analyze casting stress defects. Involving too many complex influencing factors, the stress simulation is very difficult and retains a hot spot of macro simulation in foundry engineering. Currently most researchers adopt integrated FDM/FEM method, i.e. using finite difference method (FDM) to calculate solidification and heat transferring, while finite element method (FEM) to simulate stress. Some universal commercial FEA packages are usually adopted. This study has tried two kinds of approaches to simulate casting thermal stress. One is based on ANSYS, a well-known powerful FEA analysis software. Another is to develop an independent own copyrighted casting stress simulation system based on FDM. The routes of these two methods were given respectively. To calibrate the simulation system, a stress frame sample and a real practical casting were simulated and pouring experiment was also carried on. The results of simulation were in agreement with the experiment results and practical cases. It indicates that these two approaches can all meet demands. When adopting FDM method, thermal analysis and stress analysis can use the same FD model, which can avoid the nodes matching between different models and reduce the errors of thermal load transferring. It makes the simulation of fluid-flow field, temperature field and stress field unify into one model. This system takes full advantages of mature FDM technology and can be used to simulate the forming of residual stress and predict the occurrence of hot tearing.

Abstract: At home and abroad the process of refined cotton mainly used pressing for washing and dehydration. The refined cotton with high water content, drying energy consumption is high. In this paper, base on the application of centrifugal dewatering process nitrocellulose, combined the characteristics of refining cotton with centrifugal dewatering process principles, the key technology of overflow limit and Pusher resistance were analyzed and discussed. Centrifuge dewatering replaced pressing dewatering, can improve product quality, and achieve energy saving with good socio-economic benefits.

Abstract: Data of LAI(Leaf Area Index) are needed to study characteristics of photosynthesis and evaporation by canopy of plant community. The indirect method—Imaging Digital Canopy, based on “gap-fraction” process, was described in this paper. By study in various communities about 9 measuring spots, it showed characteristics of community such as LAI, radiation transmission, extinction coefficient. LAI of Vatica hainanensis forest was measured according to height of community in different developing stage. The technique to minimize error about the Digital Plant Canopy Imager CI110 was mentioned. It was discussed that LAI of Vatica hainanensis forest was lower than that of typical rainforest. It also certified that LAI of seashore rain forest was lower than that of typical mountain rainforest. And LAI correlation of various vegetations was also mentioned. The result should supply scientific basis to study on air environmental effects of tropical seashore vegetation, especially in O2/CO2exchange, water recycle and water-lose, solar energy utilization efficiency.

Abstract: Urban cluster is a urbanized process, in the specific areas, city of different heterogeneity, type and the rank of scale forms urban network community which based on the relation of regional economic development and the market link. With the development of central China, various provinces in middle of China are constructing the provincial capital city as the centre of their urban cluster, and try their best to make the urban cluster in middle of China become the pole of regional growth and the core of economic zone. The economic development condition of urban cluster makes a key function on the development in the middle area of China. For impetus the development of urban clusters in middle of China fast and healthy, speeds up the development speeds of these six big urban clusters, expansions the economic impact scopes of these six big urban clusters and enhances the economic potentialities of these six big urban clusters are the development key point of those urban clusters. So, we must firstly thorough understanding the present social development situation of these six big urban clusters in middle of China, then we could target-oriented promote economic society's coordinated development of each urban cluster. This paper has illustrated present social development situation of six big urban clusters in middle of China thoroughly, has analyzed the existing financial circumstances emphatically of these six big urban clusters in middle of China by consult massive correlation data, has calculated economic development level and the equalization of these urban clusters in middle of China by mathematical models, by done those things, we mean to provide more actual guiding senses on economic development of those urban clusters in the future.

Abstract: Multivariable non-square system with time delays often arises in the chemical production process. Owing to the matrix that is adopted to describe non-square system is not square, many classical multivariable control methods can be hardly applied in such system. In this paper, based on Non-square effective relative gain (NERGA) a novel decentralized PID control method is proposed. The input and output loops of the non-square system are paired though NERGA firstly, and then strong robust decentralized multivariable proportional-integral-differential (PID) controllers are designed individually based on the squared models. Finally, Simulation study was carried out for three inputs and two outputs system, the simulation results can demonstrate the effectiveness of the proposed method.

Abstract: This paper describes the wear characteristics of impregnated diamond bits when drilling in Al2O3 armor ceramic. With different bits being developed, drilling experiments and scanning electron microscope (SEM) examinations were conducted, and the results show that diamond wear types consist of complete crystal shape, micro fragmentation, whole fragmentation, wearing flat and falling off of diamond; abrasive wear, impact abrasion and erosion exist in the wear of diamond and bond; diamond grain size and concentration have their optimal value under fixed machining conditions; diamonds of high quality could increase bit drilling efficiency and serving life; the bit whose abrasion rate of bond matches that of diamonds presents the best comprehensive properties.

Abstract: This article focuses on modeling and intelligent control of car following behavior. The car following behavior has been modeled by nonlinear equations, and this model has been validated by measured data of different drivers and cars and has been simulated in MATLAB software. An ANFIS controller for car following behavior has been designed and simulated in this paper. The simulated relative distance between the LV and the FV and relative speed measured by the radar sensor are sent into the ANFIS controller to simulate the car following performance. The simulation results show that the ANFIS controller has better effect than the real drivers to obtain objective of setting the least relative speed and safe distance. The presented controller can be used in analyzing and correcting driver’s behaviors, developing cooperative systems and safety systems of driving, intelligent car and traffic flow.