Advanced Materials Research Vol. 981

Abstract: Polyphosphazenes containing carbazole grafted by azo nitrobenzene is synthesized by microwave method in this paper. Its structure is characterized by infrared (IR) spectroscopy and UV-visible spectroscopy. This new polymer, with both electro-optic(EO) property and photoconductive property, has unique stability and can be easily processed. Terahertz(THz) wave can be detected using the device which is made with our new polymer. The time domain waveform and frequency spectrum of the THz wave are obtained.

Abstract: In this paper, the device of VDMOS packaged in a TO-220C power is acted as research object. ANSYS finite element software simulation is used to build the three dimension model, the software is also used to imitate the stress distribution under the frequency of 220Hz ~ 400Hz. The simulation result shows that the stress of the chip of corresponding to the empty space is bigger than the others as the increasing frequency on the boundary of bonding layer and the chip, which easily leads to micro deformation of the bonding layer and the micro crack of the chip. The value of stress effects by changing the bonding layer material and layer thickness, the simulation results show that the bigger heat conductivity coefficient and the thinner thickness of bonding layer is the smaller stress, Which the design of the bonding layer can be optimized. The results of the study provide the theoretical basis for the structural design of the device, founding the weakness of structure design, having guiding significance for improving the reliability of the device.

Abstract: In order to solve the problem of non-uniform electric field distribution in converter transformer barrier system caused by conductivity difference between the transformer oil and pressboard, the SiC(silicon carbide) modified pressboard was developed by nano doping method. The conductivity of modified pressboard was measured. The measuring results show that the conductivity of modified pressboard increases exponentially with the increase of nano SiC doping ratio. The electric field strength has obvious influence on conductivity at high nano doping ratio, which shows great nonlinear characteristic. Based on the nonlinear conductivity characteristic of modified pressboard, the homogenizing effect of the nano modified pressboard on electric field distribution was verified by simulation. The simulation results show that the electric field distribution under DC and polarity reversal voltage in barrier system can be well homogenized by using the nonlinear characteristic of nano modified pressboard.

Abstract: In this paper, alkyl polyglucoside (APG) and fatty alcohol polyoxyethylene ether (AEO₃) were prepared to obtain a new type of soluble viscosity reducer which can change the rheological behavior of the crude oil and reduce its viscosity using method of emulsification viscosity reduction. The typical sample of heavy oil produced in Jilin oilfield was analyzed to figure out the key factors of influencing the viscosity of this heavy oil and the static evaluation experiments were carried out to investigate the reducing performance of the viscosity breaker. The viscosity breaker can lower the interfacial tension between oil and water to some extent, and the stability of emulsion between the oil and water is relatively good, in addition, it can provide high viscosity reduction rate and detergent factor of oil to produce a good viscosity reduction performance.

Abstract: By using organic semiconductor CuPc as photosensitive materials, we prepared an organic thin film transistor with the vertical structure consisted of metal Cu/ organic semiconductor CuPc/ Al/ organic semiconductor CuPc/ indium tin oxide ITO. CuPc semiconductor material has good photosensitive properties in the 700 nm light. When the light signal irradiates organic semiconductor photosensitive material, the electron-hole exciton is separated into photocurrent in built-in electric field produced by organic semiconductor material/ metal schottky contact. It transforms into the driving current of organic photoelectric triode. By using its current amplification effect, the output current increase obviously. The test result shows that the I-V characteristics of the transistor are obvious unsaturated triode characteristics. When using 700 nm light to irradiate the device, the working current of the device increases obviously.

Abstract: Warehouse shelves were quantified and partitioned based on activity based classification storage. In the warehouse, order batching method based on activity based classification storage was adept to batch orders. After finished batching, goods mainly concentrated on A, B and C area. Traversal strategy, return strategy, midpoint strategy and largest gap strategy was compared with each other according to the orders belong to different areas. Mid-point strategy and traversal strategy would make picking easy and efficient on the basis of order bathing result.

Abstract: Financial agglomeration is the transfer and concentration of financial resources in space , this transfer and concentration can make the zone enterprises obtain financing at lower cost, particularly financial agglomeration can reduce the enterprise financing cost, time cost, and unstable financial risk cost ; then this paper uses the listing Corporation and the various provinces and cities in 2011 which issued A shares of the financial as the sample data, starting from the financial agglomeration effect on the enterprises' financing behavior as the point of empirical analysis, the results show that: the financial agglomeration degree and the enterprise financing cost is negatively related, namely the financial agglomeration reduces the financing cost.

Abstract: The railway passenger flow is greatly impacted by different months and weeks of the season, and the impact is periodic. Accurate evaluation of the seasonal index for predicting the railway passenger flow is of key importance. Based on this background, the paper proposes an algorithm for calculating the seasonal index which is impacted by both months and weeks. The railway passenger flow between different OD(Origination Destination) is affected by months and weeks quite different. Therefore the paper focuses on the method for effective calculation of the month index and week index on the basis of time series clustering. When adopting hierarchical cluster, general Euclidean distance and its expansion used as a similarity metric is widely applied in time series comparison, however, this distance measurement is not robust enough for the processed data. Dynamic time warping is a pattern matching algorithm based on nonlinear dynamic programming technique. It is applied to calculate month and week index to get seasonal index that defined in this paper, which has good application value for predicting the passenger flow.

Abstract: In this paper, we analyzed the characteristics of the agri-food supply chain network, described the reasons of the network hierarchy generated. Based on the analysis we proposed a layered agri-food supply chains weighted complex network model. This model possess topological characteristics of the real network, and effectively depicted the mechanism of formation and evolution of the agri-food supply chain network. This has important practical and theoretical significance for the rational design of agri-food supply chain network.

Abstract: Under the background of economic globalization and cross-cultural management, this paper proposes hypothesis and model of affective identification motivation mechanism in Sino-Japanese bi-cultural teleworking (BCT) teams, based on ample resources of literature and system rational analysis thinking. This paper firstly studies the working process of Sino-Japanese BCT teams by management experimental methods. And then the experiment data and proposed hypothesis are analyzed and verified statically. Finally, a conclusion is obtained that in Sino-Japanese BCT teams, team's affective support, work attitude identification, cultural affective identification can enhance team identification, moderated by team members’ perception level.