Advanced Materials Research Vols. 219-220

Abstract: In traditional dynamic principal component analysis (DPCA) for fault detection, there are some drawbacks such as an excess of the number of principal components (PCs), low computational efficiency, etc. For dealing with the problem, this paper develops a hybrid dynamic principal component analysis (HDPCA) technique, this method can remove spacial and serial correlation by divide-and-conquer algorithm instead of parallel processing strategy, which can detect individual fault accurately and efficiently. The strip breaking fault in steel rolling process is used to demonstrate the improved performance of developed technique in comparison with traditional DPCA fault detection methods. It can be perceived that HDPCA algorithm has the better performance of fault detection and computational efficiency.

Abstract: The paper studies transformer optimal design, establishes optimal transformer model based on total owning cost. It adopts penalty function to process objective function with weighted coefficients. For prematurity and low speed of convergence of Simple Genetic Algorithm, improved adaptive genetic algorithm is adopted. It increases crossover and mutation rates, and improves fitness function. It is adopted to search for minimum total owning cost of transformer. The result shows that the algorithm performs well, increases converging speed and betters solution.

Abstract: Spectrum is limited, in order to develop high efficient modem, Complex FastICA algorithm is studied about its potential use in UNB signal detection. First, principle of Complex FastICA is presented, kurtosis and cost function are analyzed, and realization of Complex FastICA is given; then, M-EBPSK modulation method is supposed as a kind of UNB modulation format, UNB-ICA model for UNB received signal with interference and noise is presented by analyzing the characteristics of M-EBPSK modulation; finally, computer simulation is done by using nosy UNB-ICA model based on Complex FastICA Algorithm, the experimental results show that Complex FastICA Algorithm can suppress the interference and improve detection BER in contrast to the traditional methods, it is hopeful that the method can be used in UNB communication technology.

Abstract: The Catalytic Divided Wall Column (CDWC) for hydrolysis of methyl acetate (MeAc) is designed and optimized. Distillate rate and side rate of CDWC are used to maintain the desired product purities, and the minimum reboiler duty is obtained by changing the reflux ratio and vapor split ratio. The result shows that the new process can save energy consumption by 20.1%.

Abstract: Community banks maintain advantages in providing personalized financial services. This mainly comes from these banks’ credit managers close communications with borrowers, which make them possible to effectively use the borrower’s information to customize corresponding financial products. The high interest rates and the huge financing gap related to small businesses show that the demand for the development of community banks in China is intense. To achieve “being integrated into the community”, China’s community banks should be set up independently from the grassroots by small businesses and households within communities.

Abstract: In former researches, the classification of the various indicators in the research of rural worker migration was pointed from the researchers’ subject views. This paper firstly investigated the available data of a series of application indexes related to the rural worker migration, using the method of principle component analysis (PCA), generally drew a conclusion on the affects of the migration dynamic factors divided into four main components, such as agricultural factor, demographic factor, economic factor, industry structure factor. Then we added 0-1 variables to the original target led by the method of logistic regression, finally obtained its results that agricultural factor and economic factor are the main dynamic factors of rural worker migration.

Abstract: This paper presents the experimental investigation carried out to study the behavior of polypropylene fiber reinforced concrete (PPFRC) under compression and flexure. Crimped polypropylene fibers and twisted polypropylene fiber were used with 0.0%, 0.2%, 0.4% and 0.6% volume fractions. The influence of the volume fraction of each shape of polypropylene fiber on the compressive strength and flexural strength is presented. Empirical equations to predict the effect of polypropylene fiber on compressive and flexural strength of concrete were proposed using linear regression analysis. An increase of 27% in flexural strength was obtained when 0.6% volume fraction of twisted polypropylene fiber was added. It was also found that the contribution of fiber in flexural strength is more effective when twisted fibers were used. The compressive strength was found to be less affected by polypropylene fiber addition.

Abstract: UHF RFID system has been mainly used in logistics,production and supply chain management. The implementation of UHF RFID reader with excellent performance is still challenging. This paper presents a UHF RFID reader implementation for EPC C1G2 protocol. EPC C1G2 physical layer architecture and some critical modules like encoder ,decoder, modulator and demodulator are described in details. All modules are verified in FPGA and the experiments demonstrate that the designed RFID reader baseband system could perform well.

Abstract: Framework in e-business platform based on VRT (Virtual Reality Technology) was discussed, and difficulties in the process were investigated, which was followed by corresponding solutions. Then solution was got as: (1) in allusion to exceptional situation in the server-side, the mechanism of cutoff and junction is wondrously effective by the way of using the language statements, “try” and “catch”; (2) packaging data enables server-side to receive a great deal of data, and to escape data pileup; (3) using the way of scene switchover can settle harmonization of the whole and the part; (4) problem of motion picture flicker can be commendably solved by using double buffer memory of technology with Java; (5) the key numeration algorithm of bitmap rotation can account for the problem of quick rotation of bitmap.

Abstract: Temperature is one of the most important parameters to evaluate the status of electric equipments. In this paper, a temperature monitor and query system based on virtual instruments and infrared temperature monitoring technical is introduced, including the hardware build-up and software realization. The system a multiple function system, including measurement and control parameter setting; data acquisition and processing; data, chart and graph displaying; signal processing and analyzing; data saving and so on. It can meet the need of the precision request in the temperature measurement of electrical equipment. Also it can be applied in other related experiments and developed further.