Showing papers in "Computer Knowledge and Technology in 2011"

On"Cloud Computing"

Abstract: Google,Amazon,VMware,Microsoft,Oracle,IBM and other international giants announced his" cloud security plan",cloud,cloud storage,internal,external,public cloud cloud cloud,private cloud......A bunch of people see things in a blur concept in the constant impact on people's nerves.The world of Internet enterprises and telecommunications companies in March Xiang Yun computing.What is cloud computing? This article from the service mode,the application features and development potential of cloud computing has thorough research.

Risk Assessment of Information System

Abstract: This article from standard,models,knowledge,and dynamic,and many other aspects of information systems risk assessment methods for parsing and pointed out that the method for quantitative and qualitative analysis of their respective advantages and disadvantages,finally on the development of risk assessment method of trend views are given

Phase-Locked Loop Circuit Design

Abstract: Aiming at the defects of the existing analog phase-locked loop,the idea of fabricating analog phase-locked loop with imported VCXO is introduced in this article.The article also puts forward the design and selection of elements of the circuit.Test with experiment shows that feasibility of such scheme and the possibility of circuit improvement.

Study on the Architecture and Key Technologies for Internet of Things

Abstract: Internet of Things(IoT) combines sensor technology,embedded computing,Internet and wireless communication technology,distributed information processing technology,and has broad application prospects.Therefore,the revolution of the Internet of Things(IoT) has attracted highly attention of domestic and foreign government,academia and industry.There are still many open issues in the definition,architecture and key technologies of IoT.In this paper,firstly,based on analysis of existing literatures of IoT,the basic concept of IoT is dis-cussed from the view point of the architecture and key technology.Five essential factors which the IoT should have are summarized.Sec-ondly,the architecture is further proposed.its structure and functions are described.Thirdly,the key technologies of IoT are analyzed,in-cluding recognition technology,sensing technology,network technology and smart technology.Finally,this paper gives some suggestions of IoT development.

An Improved Image Segmentation Algorithm

Abstract: In view of the problems of the precision of segmentation and that the speed of interactive segmentation algorithm is slow,we have made the improvement to original Live-wire algorithm.The improved algorithm uses the canny-operator to replace the laplace-operator,and uses the automatic segmentation algorithm in ITK to segment excess.It can enhance operating sp eed,at the same time,can enhance the precision greatly.

Study on The Internet of Things

Abstract: This article mainly introduces the concept of the Internet of things,present situation and prospect of the Internet of things devel-opment,focuses on the application of RFID technology and the advantages of the Internet of things technology,and pointed out that the current the Internet of things technology security,high reliability and cost issues.

Software Project Risk Assessment Model Based on Fuzzy Theory

Abstract: Many uncertainties always exist in the development and management process of software project,To handle with the complexity and uncertainty of software project,the paper proposes a software project risk assessment model based on Fuzzy theoryUsing the model,we can assess the consequences and the loss of the risk,besides,it can measure a combination of impact of a certain risk from a variety of risk and the combined effects of the overall consequences from individual riskPractice proves that the model can predict risks and identify the sources of riskIn a word,it provides a way to effectively reduce the risk probability and increase the rate of the success of software development

Survey on Clustering Routing Protocols for Wireless Sensor Network

Abstract: With introduction of the technology related to clustering routing protocol for wireless sensor network and merits of clusteting routing protocol,some representative clustering algorithms and main desgin principles are emphatically analyzed.Firstly,the related technology to clustering algorithms and it's merits are presented.Then a comprehensive survey with analysis is made to different methods and representative protocols.In the end,the related protocols are compared,moreover the open research problems and possible solution are pointed out.

Relational Database and NoSQL Database

Abstract: This paper introduces a database called NoSQL,thoughout the descriptions of the traditional relational database and its present problems,meanwhile,points out the characteristics of NoSQL datebase and the current application situations;finally,summarizes how to use in combination with NoSQL database and the traditional relational database in some scenes and illustrates with some examples.

Fault Management Architecture in Wireless Sensor Networks

Abstract: By considering the resource limited of wireless sensor networks,this paper study the fault management issue in wireless sensor networks.Focus on listing and comparing the general fault management architecture.The result we present is benefit to the application of wireless sensor networks.

The Review of Face Recognition

Abstract: This paper analyzes the main methods of automatic face recognition and elaborates the evolution history and the current situation of the relevant research.Several promising directions for future research are also proposed in this paper.

Application of Greedy Algorithm in the Arranging of Lock Chamber

Abstract: The arranging of lock chamber is a two-dimensional packing problem.Based on greedy algorithm,this paper studies on how to reduce two-dimensional packing problem to one-dimension,the mathematical model is constructed and then algorithm for the problem.Last,running in Visual C++ platform,optimum combination results is obtained and indicates the method can improve utilization of chamber area efficiently.

Vision-based Human Motion Analysis:a Review

Abstract: Human motion analysis is currently one of the most hot research topics in computer vision.This interesting issue is widely used in different areas such as virtual reality,video surveillance,human machine interface,etc.Vision-based human motion analysis concerns the detection,recognition,description and tracking of people.Furthermore,it also concerns the understanding of human behavior patterns.In the past years,various methods and applications for these issues are discussed.This paper provides a brief review of researches on vi sion-based human motion analysis recently.Finally,this paper gives some challenges and future directions of this topic.

Achieve and Comparison of Image Segmentation Thresholding Method

Abstract: Image segmentation is a key step for image analysis,Is also the basis for further understanding of the imageIn this paper,discusses several commonly used image segmentation algorithms and theory,and to study the aggregate asphalt mixture characteristics of the background,experimental results are shown to compare histogram threshold,Iteration method and the Otsu

A Parametric Design Research on the Parts of Automobile Chassis Applied Solidworks

Abstract: Based on the method of Solidworks and its application Programming interface function for further development,this paper gives the secondary development for Solidworks in Visual Basic and established a parametric system.Based on key parts library and the instance of chassis's product,this paper introduces the course of developing part and enhances the quality and efficiency.By the method of developing the key product for automobile chassis,it has been proved that the system can satisfy the market rapidly.

Design of Resistance Furnace Temperature Control System Based on Fuzzy-PID

Abstract: With SCM as the principal part,the resistance furnace temperature control system is designable which is able to process data and control function in this paper.The system features auto-measurement,gathering data real time,dealing with and control result display,and print.This thesis applies MCS-51 as the center unit to design the fuzzy controller.The fuzzy controlling arithmetic is used in software. Self-adaptive PID parameters are modified on line,fuzzy self-tuning is made.Combining the Fuzzy control quickness,very small over shoot,and classical PIC control,the system eliminates the stable error.

Internet of Things Technology and Application in Coal Mine Industry

Abstract: The internet of things(IoT) has been paid more and more attention by the government,academe and industry all over the worldWith the analysis of the development and conformation of IoT technology,this paper introduced the concept of IoT,the basic char acteristics and attributesIt also described the development phases,system structure and the key technologies of IoTAim at the safe status of domestic coal mine,analyse and prospect the application of IoT in coal mine industry,provides a new insight for the safety production

The Function Optimization Based on Cloud Genetic Algorithm

Abstract: Genetic algorithm is an optimization technology which is based on the theory of evolution,and using design method of the ge-netic combination,genetic mutation and natural selection.The selection of Genetic algorithm’s crossover probability and mutation proba-bility are the key which is influenced the behavior and performance of genetic algorithm,directly affects the convergence of the algorithm.This paper combines the normal cloud model cloud droplets of randomness and stable tendency,by X condition cloud generator to gener-ate adaptive crossover probability and mutation probability.Function optimization experiments show that,the cloud genetic algorithm con-vergence requires fewer generations,convergence rate is faster than the standard genetic algorithm.

Data Collection and Fault-tolerance Analysis about Cloud in the Calculation

Abstract: Computing clouds is a kind of when the Internet is center,with open standards and service is our foundation,provide safe and reliable calculation service computer technologyThis paper will be based on the special cloud environment,how to under this environment of data collection modes,and based on the data collection process of possible surprises,analyzed the data fault-tolerant aspects the cloud's approach

An Improved KNN Algorithm Based on Clustering

Abstract: By studying the KNN algorithm,I proposed the method a training set of text clustering results using KNN algorithm to im prove,first the training set using text DBSCAN algorithm to cluster together,the text is divided into a number of training set clusters,then using KNN algorithm test document for testing,and finally with the nearest cluster of n number of training set in the text text using KNN algorithm to classify the test.Experiments show that the improved algorithm reduces the amount of computation,improve efficiency,while a certain improvement of clustering results.

Image Segmentation Based on Improved Watershed Algorithm

Abstract: With regard to the over-segmentation of traditional watershed algorithm,an improved watershed algorithm based on pre-processing is proposed aiming to human brain MRI image.Noise is considered as direct factor of over-segmentation in this paper.Firstly,morphological opening operation and closing operation are used to denoise.Then,calculate the gradient image for the denoised image.Subsequencely,amend the gradient image according to inside and outside marks.Finally,implement watershed transformation on the amended gradient image.The results show that this method can effectively restrain the over-segmentation of traditional watershed algorithm.

Key Management Scheme for Wireless Sensor Network

Abstract: Wireless sensor networks used for military target tracking,environmental monitoring,tracking and other aspects of patient condition,when its deployment in a hostile environment,subject to different types of malicious attacks,protect their safety is extremely important.Strictly limited resources of sensor nodes,traditional network security mechanisms do not apply to wireless sensor networks.Protect the security of wireless sensor network is used to encrypt the transmission of data,the article presents and analyzes the type of network for a typical key management scheme.

Computer Network Security and Prevention

Abstract: With the rapid development of computer network technology,the network has not only brought unprecedented convenience,but also more security issues.This article analyzes computer network security risks and introduces a list of guard measures for computer network security.

The Image Enhancement Based on Histogram

Abstract: Image enhancement which is also called image pre-processing,can improve the visual quality of the whole and partial image,by transforming the image's data according to some special methods.The image enchancement based on histogram equalization and specification can improve the contrast details and the dynamic range of gray level of the image.The MATLAB experiments demonstrate that the image enchancement based on histogram equalization and specification actually make the image better in vision.

Computer Network Security and Prevention Strategy

Abstract: Twenty-first Century is a new era of global information,and the Internet technology will play an important role in it,it is wide ly used in the fields of economy,politics,culture,education and military and other fields,it brings great convenience for people at the same time,are also subject to increasingly serious security threat from the networkThis paper briefly analyses the computer network in the pres ence of several potential safety hazard,and for security hidden danger to the security strategy

Application of the Internet of Things in the Intelligent Parking Management System

Abstract: Based on RFID,wireless sensor networks,ultrasonic sensors and other technologies of the internet of things proposes intelligent parking management system mode.By the whole process description of the vehicle's entry and exit from the parking.The paper introduces the practical application of parking reservations,parking guidance,parking monitoring and control.

Fuzzy Clustering Method and Application

Abstract: Fuzzy clustering method are using fuzzy pattern recognition of the basic theory,the basic ideas is the need to identify the templates,with a vague to be the classas a model identification using fuzzy mathematics of the basic concepts,principles of settling the classification identification of problemsthis article,it focus on two types of pattern recognition of the problem of research,under some kind of a stock method,and discussed the vague and class methods of traditional mode of the application recognize

Research of Hadoop Performance Tuning Technology

Abstract: Hadoop technology had been wildly used and research around the internet and academics.The article introduce the reminded problems of Hadoop data processing platform and Illustra Configuration parameters imization the hadoop performace to increase the system performace and efficiency.

The Design and Implementation of Online Player Based on Android Platform

Abstract: This paper introduces a system architecture of a new generation of smart phone software development platform named android.For the current situation of the streaming media on android platform is underdeveloped,multimedia and caching technology are studied to design a music-playing software and achieve it in the mobile client simulator.This software can not only download music on the website,but also support the music playing while downloading more importantly,and eventually meet the needs of the client user.

Applied Researching of Ant Colony Optimization

Abstract: The Ant Colony Optimization(ACO) is a new evolution algorithm with a widely application for solving the discrete or continual optimization problems.This paper briefly summarizes the research state of this algorithm,and introduces the basic theory,the construction of the model,and some kinds of improved algorithm forms of ACO.