For analysis  principle of IPA(Intelligent Parking Assist) and testing its performance,a IPA intelligent parking assist system based on embedded  was designed.T
he system detects the parking spaces with IR((Infrared) sensors and ultrasonic sensors.Then analyzes the feedback results of the sensors with LPC1114,and control the motor and servo to achieve the simulation of IPA system.The test result is safety and stability.

We use genetic algorithm to plan robots path in the polar coordinate.A new compositive fitness function based on multiple attribute decision theory is proposed.Using genetic algorithm with this fitness function can plan the optimal path.The path satisfies the constrained attributes of path,time,and energy dissipation optimal.Based on a new introduced perfect fitness function,a new mutation operator is proposed.The advantage of the mutation operator is that it can guarantee the outstanding individual with smaller variable rate,inferior individual with larger variable rate.The simulation results demonstrate the effectiveness and realtime of the proposed algorithm.

To address the shortcomings of the mere description of the shape of the contour can only describe a simple shape,a fusion of the smallest and statistical chain code and the entropy matrix singular value feature shape classification and retrieval methods,a combination of structure and statistical point of view based on the shape of the contour and regionalshape description,the same time,both the shape of the spatial distribution characteristics. Regional characteristics of the shape extends the spatial distribution characteristics of shape description with the robustness,the shape of the entropy matrix singular value characteristics of the noise stability to make up the chain code to describe the shape characteristics susceptible to noise limitations. Designed and implemented a shape retrieval based on MPEG7 shape database platform,and experimental results show that the algorithm has a better rotation,translation and scale invariance in shape retrieval and matching.

Considering the difficulty of real-time monitoring the field equipments interconnected with CAN(Controller Area Network) bus in the small scale industrial production workshop,we put forward a design scheme of embedded test system of CAN-bus based on wireless communication.The test system uses LPC2129 microprocessor as the central controller,uses μC/OSⅡ operating system as software platform,supplemented by nRF2401 modular and LCD（Liquid Crystal Display) monitor,etc.Software programming  completeed communication test program and wireless data transmitting program.Experimental results show that the system can realize CAN field bus network communications test and wireless data transmission.The test system solved the problem of realtime CANbus monitoring in a small space of wiring in difficult condition.

In order to enrich the product categories and function of the dynamic electrocardiogram,a new type of dynamic electrocardiogram product based on ARM(Advanced RISC Machines)Cortex-M3 is developed.The system hardware consists a processor minimum system,bioelectricity amplification module,storage module,LCD（Liquid Crstal Display)  and touch screen module,high speed USB interface and the power module.For the system software,the platform was build based on CooCox CoOS embedded real-time operating system, the file system and USB middleware.The man-machine interface is realized by transplanting uC/GUI.The experiment results showed that the system could be used to control ECG signal collection,great capacity data storage and high-speed upload.The graphical user interface and real time waveform display are the innovative points.

For the error problem of space spectrum estimation algorithm in the practical application,the background of the amplitude and phase error exists in the array is discuased,a method of MUSIC(Multiple Signal Classification) algorithm is realized in DSP(Digital Signal Processor).Through the setting position accurate auxiliary source of amplitude and phase error correction,the orientation of the auxiliary array information for error parameters provided the necessary information,and then the MUSIC algorithm of wave direction estimation,at the same time use high-speed DSP chip(TMS320C6713) of TI company to implement MUSIC algorithm under the background of the amplitude and phase error in the array.The simulation results prove the effectiveness of this method.

To achieve fast charging of lithium battery, based on MSP430 microprocessor, an intelligent li-ion battery charging system with voltage and current detection function was designed.By collecting the values of voltage and current,and making judgment on charging status of the battery,PWM（Pulse Width Modulation)signal was adjusted so as to realize high-precision charging control.The unit modules and their driving software flow chart were presented.The experiment result shows that the charging system takes only 1 hour for a lithium battery to be charged,comparing its previceusperformance.

To ensure the stable operation of the airspace stabilization loop and the locked airspace of  the airborne radar antenna do not change with changes of aircraft air attitude,a ground test system is designed to detect loop‘s steady operation state.Basic requirements are  based the airspace stable circuit function and performance testing,test system hardware and software implementations are provided.Computer control and automated testing techniques are used.It is possible to test automated and precisely locate the fault.The application shows that the test system with advanced technology,simple operation,easy maintenance,stable operation,made  a significant military and economic benefits.

For the urgent needs of indoor positioning technology and the platform,we proposed a based  ultrasonic indoor three-dimensional positioning system,and described its working principle and the analyzed  ultrasonic signals.Based on the character of radio frequency and ultrasonic sensors the system encodes the ultrasonic signal using CDMA（Code Division Multiple Access） technology,so that the destination node can distinguish each beacon signal sent to the ultrasound,and combines with the RF signal to achieve TDOA（Time Difference Of Arrival） location algorithm,and ultimately does three-dimensional positioning.Experimental  shown that a three-dimensio
nal coordinate system is built by a beacon for the origin and the other two beacons placed on the X axis and the Y axis,which can simplify the triangular positioning algorithm and achieve high precision three-dimensional positioning.

In order to solve the problems that video image quality and transmission speed is low through mobile termination,combining the Android system development technology and H.264 video encoding method.At the base of extensive mobile internet technology,a new  video monitoring system is designed and implemented.Firstly,the method to transplant Android operating system to ARM（Advanced Risc Machines） platform and to collect video data based on ARM platform has been raised,then Android system architecture and start principle is analyzed,meanwhile,video encoding way of H.264 is baseline profile,the average PSNR(Peak Signal to Noise Ratio) reaches 38.210 dB,encoding frame rate reaches 136.66 frames/s,compared with main profile and high profile,the baseline profile has much higher encoding frame rate,realtime and stable video monitoring effect is implemented.

In order to overcome the defect that the decoding speech was unnatural caused by hard decision and crude judgment,5-dimensional voiced membership vector which was used to describe the information of excitation accurately,was brought forward on the basis of analyzing and comparing the algorithm which recently the mainstream vocoder used to extract and quantify the parameters of the excitation signal,and introducing the concept,membership,from fuzzy mathematics;described the extracting algorithm of voiced membership vector and brought forward the VQ(Vector Quantization) codebook of fuzzy clustering and the LBG cascade training algorithm;established the training sample set of voiced membership codebook by the means of using the extracting algorithm,and trained the codebook of voiced membership by the means of using F-LBG(Fuzzy LBG) algorithm.The results indicate that this algorithm,using voiced membership vector to describe and synthesize the excitation signal,has a very high accuracy and strong noise robustness when it was used to simulate the speech coding and decoding in the area of sinusoidal excitation vocoder,mixed-excitation vocoder and the homomorphic vocoder.

To solve the problem of lacking of global monitoring device and collision warning device for domestic bridge-detection vehicle,we design and implement an intelligent monitoring system based on Android.The system uses real-time 3D model to simulate robot arm posture in realtime from tilt sensor, achieving  global monitoring.The system can also  build virtual obstacles based on actual situation,to simulate the collision between robot arm and obstacles vividly.If collision was detected,the system will trigger the alarm.Result shows that the system has reliable performance as well as strong practicability, it not only solve the problems of the traditional video surveillance can not reach the global monitoring, and also provides a reliable reference for avoiding obstacles by labour.

In order to solve the one-dimensional chaotic encryption key space and the poor security,a composite based on the clock to transform the chaotic image encryption method. The algorithm uses piecewise linear chaotic maps,k-order Chebychev maps and onedimensional Logistic map phase composite way to generate the pixel position of scrambling matrix and the pixel value transformation matrix. Use of system clock change,random changes in the level of initial parameters of the hybrid chaotic system,thereby enhancing the security of the transmission of image information,and reached a similar “one secret” security thinking. The simulation realization MatLab7.0. The results show that the algorithm has good encryption key space.

In order to research the shock‘s contagion in a complex financial network,and to measure the systemic risk,the impact of operational event on the other participants and settlement efficiency of system under different scenarios are studied based on the mathematical modeling and simulation.The results show that the importance and position of risky bank in payment networks determine the scale and distribution of first order shocks.The distribution of first order shocks,the liquidity level and the robustness of participants determine the scale and distribution of second order shocks.Constructed systemic effect index can be a good-fitting tool for the measurement of systemic risk.

The pierer force performance impacts on the seamless steel tube quality and standards straightly.And the research of rolling force character is not sufficient at home or abroad.It is concluded that the FEM（Finite Element Method） which has better accuracy can be used in engineering calculation by comparing and analyzing the empirical formula and the FEM.The exact value of rolling pressure is applied to the practical production by the FEM.The forced state is analyzed and the law of mechanics parameter is summarized by the load distribution on the roll,the plug and the shoes in piercing process.And the error cause of the empirical formula is analyzed.

Focused on the monitoring and management problem of the password sharing, based on the method of SNA (Social Network Analysis)，researching the technology of monitoring method of customers password sharing,a method of finding the path of password sharing is improved. According to the related theory of directed graph and route in graph theory， the main arithmetic of the shortest path of password sharing  is described.Depended on scanning the shortest path of e-mail sending from system administrator e-mail box to outside e-mail box，the possible transmit path of password sharing may be found and the behavior of password sharing may be monitored. By this method，the status of password security can be evaluated and the private information leakage may be prevented.

In order to achieve instant messaging and  share  resources in LAN（Local Area Network),a tool for instant communication of voice was designed and implemented.The network communication of the software used TCP/IP（Transmission Control Protocol/Internet Protocol） protocol and its procedural framework used the mode combing C/S（Client-Server) and P2P(Point to Point).P2P architecture was used to build the communications among clients and C/S structure was ased to connect the clients and the server.Simulation results showed that the tool can be easily interconnected to LAN and it has good performance of voice communication.

Increased variability object collision detection in virtual reality technology efficiency and accuracy, an improved detection algorithm based on deformable objects collision, the algorithm uses ant colony algorithm to optimize the snake contour model, and the snakeshaped contour model is applied to a fixed direction hull bounding box update process. The experimental results show that:this algorithm greatly simplifies the reconstruction process of the fixed direction hull bounding box algorithm to improve the efficiency of collision detection, join Ant Algorithm to improve the accuracy of collision detection.

At present the majority of personnel archives management in colleges and universities is backward.Development and utilization is not enough.Level of modernization is not high.The development of the existing personnel archives management system function is not perfect.Portability is not strong.In order to solve these problems,using SAU teachers‘ archives management as a research background,this paper shows how to use SSH(Struts+Spring+Hibernate) framework and Java technology to achieve a fully functional and general management system for university teachers based on B/S mode.This AMS has been applied in the work of the personnel archives management in the university,through the system,we realized a high effective and secure management and  provide universities of all levels  strong technical support on transforming information timely and correctly.