Advanced Materials Research Vols. 204-210

Abstract: In order to explore the method to realize spatial information sharing and integration, in this article we choose REST as spatial information share framework and foundations of software architecture, focus on spatial information service characteristic, construct a REST style framework spatial information sharing model, and evaluate it. And then base on open source software, build up demo system, test the framework’s feasibility. Result turn out to be effective-spatial information sharing base on the REST style can realize spatial information sharing to a certain extent.

Abstract: The recent advances of ubiquitous wireless infrastructures and requirements for high speed context-aware computing have created the opportunities to supply the high efficient location based service (LBS) in indoor wireless local area network (WLAN) environment. Because of the serious multi-path effect, unpredictable co-channel interference and inherent equipment noise, the measured signal strengths vary a lot in the real-world indoor environment. And this strength variation will also result in the performance deterioration of radio map-based neighboring matching algorithm. In response to this compelling problem, we propose the adoption of adaptive autocorrelation-based signal preprocessing method as a specific solution by effectively eliminating the singular strength from the original fingerprint set. Finally, the feasibility and effectiveness of autocorrelation-based preprocessing are also verified by decreasing about 33.4% and 32.9% of errors in k nearest neighbor (KNN) and weighted KNN (WKNN).

Abstract: This paper aims to construct new operation of approximation operators, and explore its calculation. First it proposes logical difference operation of variable precision lower approximation operator and grade upper approximation operator. Then regular algorithm and structural algorithm are proposed and analyzed, and furthermore, a conclusion is drawn that structural algorithm has advantages in time complexity and space complexity. Finally a practical example is given to illustrate the new operation and its algorithms.

Abstract: To help the logistics industry to reduce the high costs of facilities and resources, the research, based on SOA architecture, treating OGC specifications as its service standards, is to build the third party logistics spatial location information services platform. This platform is going to achieve resource sharing and service integration for the different user roles of logistics industry, and reduce resources excessively construction and idle waste. As most resources are provided by private transporters or private warehouse operators in China, sources sharing set high demand on the design of platform architecture. This experimental verification platform implements the expected functionality and validates the feasibility of the system design.

Abstract: A novel porous micro heat sink system was presented for dissipating high heat fluxes of electronic device. The flow and heat transfer of porous micro heat sink was investigated by experiment at the condition of high heat fluxes, and the results showed that the heat load of up to 280W was removed by the heat sink, and the heater junction temperature was 63.8°C at the coolant flow rate of 5.1cm³/s. The whole heat transfer coefficient of heat sink increased with the increases of coolant flow rate and heat load, and the maximal heat transfer coefficient was 33kW(m².°C)^-1 in the experiment. The minimum value of 0.19°C/W for whole thermal resistance of heat sink was achieved at flow rate of 5.1cm³/s, and increasing of coolant flow rate and heat fluxes could decrease the thermal resistance.

Abstract: The purpose of this research is to solve stress calculation problem of the composite pipe of multihole steel pipe and polyethylene of raised temperature (PE-RT). The formulas, used to calculate the burst pressure of the composite pipe, were established separately based on three kinds of different strength theories, and also the formula, used to calculate axial stress was developed based on the deviator strain energy theory. The calculation results were compared with the measured values. It shows that the calculation results of formula based on the deviator strain energy theory are very close to the measured values. This conclusion has important meaning to the heating directly buried installation of the composite pipe.

Abstract: A rational exchange protocol is a useful protocol in which two (or more) strange parties exchange their items successfully in a way that every rational party has enough reasons to follow the protocol faithfully rather than deviate from it. This means neither parties of the protocol can gain an advantage by deviating from the protocol, but he may bring a disadvantage to the other party even if who is correctly behaving party. We introduce game theory as a formal framework in this paper. We give a formal definition for the rational exchange related to the concept of the subgame perfect equilibrium of an extensive game. We use our model to analyze the Syverson protocol by the game tree and show the relationship with Buttyan's Model.

Abstract: A new frequency-tracking control method to catch the optimal working frequency for the high power ultrasonic welding system is proposed. In a high power ultrasonic resonant system, the induced high temperature will change the working frequency. Therefore, the proposed control method to track the optimal working frequency becomes very attractive and important. This control method is practically implemented by a FPGA chip which basically includes two logic circuits. One logic circuit is to find the optimal working frequency automatically and the other one is to adjust the working frequency by detecting the working current simultaneously. Experimental results exhibit the new method can effectively control and track frequency for high power ultrasonic welding system.

Abstract: Colloidal gold immunochromatographic strip is a simple and convenient method for detecting harmful substances, such as Morphine and CLB. For the purpose of reducing sterically hinder and enhancing the measurement sensitivity, 20nm colloidal gold was choosed. Therefor, in this paper, the microwave heating method was improved to synthesize the 20nm collidal gold, the addtion of reductantan and the heating time were explored. We use transmission electron microscope and UV-vis spectroscope to character the size of series particles. The result showed that when 1ml reduces was added and the heating time was more than 2min, the gold particles were close to 20nm and much more uniform. In conclusion, the improved microwave method was more suitable for preparation of small diameter gold particles.

Abstract: Online shopping has become a new shopping style. There is little research about online impulsive buying (OIB). We develop the questionnaire of the reasons for OIB by open and structured questionnaires. There are all about 327 participants took part in our survey, of which 102 participated in the open questionnaire and another225 participated in the structured questionnaire. Based on content analysis, we found that the reason for OIB includes four factors: perceived usefulness, price, entertainment and interpersonal interaction. Internal consistency analyses and CFA (Confirmatory Factor Analysis) showed the questionnaire had high reliability and validity.