Shou Qi Cao

Study on an Anti-Collision Algorithm of RFID Based on Binary Searching of Backtracking

The problem of anti-collision tag is a common problem of the radio frequency identification (RFID) system. ALOHA algorithm and binary search algorithm is the main algorithm to solve the collision problem. This paper analyzes the effectiveness of binary searching of backtracking algorithm in time slot number of shortening identification tags. Combining the theoretical analysis what needs to be improved in binary searching of backtracking algorithm.

Study on Prediction Model of Dissolved Oxygen about Water Quality Monitoring System Based on BP Neural Network

Eriocheir sinensis should cultivate in high water quality ponds, which is affected by many combined factors such as physics, chemistry, biology etc. Using the real-time water quality monitoring historical data to test one of the water quality indexes and predict this index in the next time has great significance. The dissolved oxygen is one of the most important indexes in aquaculture, such as in the Eriocheir sinensis pond. This paper established a dissolved oxygen prediction model of water quality monitoring system based on BP neural network. The forecast data which is predicted by the established model could fit the actual monitoring data very well.

The Architecture of IOT Smart Service System of Ocean Fishing Vessel and its Application Based on Petri Net

Founded on the requirements of ocean fishing vessel and its operating system, this paper discusses and structures the architecture model of open service components based on a new-type IOT (Internet of Things). Then, this paper disserts the dynamic representation method of service components relationship in the system based on the Petri net. Under the effect of this method, the users overall acquisition capability of the service component base has been enhanced, which contributes to discover the conflict and redundancy of solving among the service components and provide an intuitive illustration mechanism for the combination configuration of service components. The intelligence of the system and the advantage of SOA are evaluated as well. Meanwhile, the reliability of the method is proved by means of the experimental simulation in this paper.

The Application of Wireless Sensor Network in Ocean Fishing Vessel

A wireless sensor network (WSN) has important applications in many industries such as military, environment, healthy, home et al. This has been enables by the availability, of sensors that are smaller, cheaper, and intelligent particularly during the past few years. The design of a WSN depends significantly on the application, and it must consider factors such as the environments, the applications design objectives, cost, hardware, and system constrains. This paper constructs significantly the architecture of ocean fishing vessel WSN system, and briefly discusses existing problems of WSN technique and future research directions in application aspects.

Finite Element Method Simulation of Induction Heating for a Large Marine Crankshaft

Shrink fit is an important method used to connect mechanical parts but less studied by three-dimensional finite element method. Based on the theories of induction heating and thermal conductivity, we established a three-dimensional FEM. The model included the induction coil, crank throw and air. The pattern of temperature field distribution during the period of induction heating were numerically simulated with software ANSYS .The simulation showed that, crank throw can obtain a uniform temperature field around the hole after induction heating .As a result, the crankshaft reaches a highquality shrinkage fitting, manifesting the feasibility of the application of induction heating to the crankshaft shrinkage fitting.

Impaction of Travel Behavior and Degree of Business District Prosperity on Shopping

Three Media-Markets located in Shanghai have been studied the research in this area to quantitatively analysis how transportation factors such as travel time, transportation method, distance, cost and the degree of business districts prosperity affect store choice behavior.

Finite Element Method Analysis for Marine Semi-Built-Up Crankshaft Shrinkage Fitting

Based on the theories of induction heating and thermal conductivity, and by establishing a three-dimensional finite element analysis model including the induction coil, crank cheek and air, the pattern of temperatures field distribution and thermal deformation condition of the crank cheek during the period of induction heating were numerically simulated with software ANSYS. The simulation result showed that, by setting a circular coil inside the crank cheek, a uniform temperatures field around the hole would be obtained after a certain period of induction heating. As a result, the crankshaft would reach a high quality shrinkage fitting, manifesting the feasibility of the application of induction heating to the crankshaft shrinkage fitting.

Research on Prediction Model of Car Sales Based on Grey Neural Network

Nowadays, zero inventory and just in time production and management technology are got attention by more and more domestic and foreign automobile enterprises. Accurate prediction of car sales is the key technology for ensuring zero inventory and product planning of enterprises. In this paper, a prediction model about car sales based on grey neural network was researched. Combining the advantages of grey model in the way of dealing of small sample data, and BP neural network in finding regularity of weak correlation data, the accuracy of the prediction results was improved. Finally, the model was validated by practical application of automobile enterprise production data.

Analysis of Hydrodynamic Model of Wave Energy Converter of Inverse Pendulum

The efficiency analysis of wave energy collection and conversion is crucial for utility of wave energy of inverse pendulum. In the paper, we build the hydrodynamic model of interaction between pendulum and wave in wave energy converter of inverse pendulum. On the basis of this typical model, we choose the actual wave condition of some sea area in the east of China as the background, research the hydrodynamic property of pendulum by numerical simulation with fluent software, get the relation curve of between the rotation angle of pendulum and moment of wave force with time, and acquire energy conversion model from wave energy to mechanical energy in wave energy converter of inverse pendulum. It makes the beneficial exploration for optimal design of wave energy converter of inverse pendulum.

Measuring Free-Flow Speed Considering Water Depth

In this paper, we propose a method of measuring free flow speed according to different water depth in the ponding situation. With different water depth, changes of tire-road friction coefficient caused by reduction of the wheel load are different. This coefficient brings great effect to vehicles free flow speed. In order to reveal this phenomena, observations data obtained in the year 2009 at the number 202 state road in Japan, which runs through Fukuoka, Itosima. By measuring the recording data, we got the speed range corresponding to different water depth. The purpose of this study is to obtain variation of free flow speed according to different water depth and lay foundations for numerical modeling in the future.