bluuebunny/crossref_metadata_2025 huggingface dataset:
Automatic Generation of Design Scheme Based on Improved Segmentation Genetic Algorithm
Authors: Chen Ji Wen , Huang Bo , Pang Bo , Li Li
Published: January 2015

Research on composition and quantitative representation of the function unit structural information, seeking the combination process effectively, is the key technology to generate product design schemes. Full life cycle assessment properties of structure is introduced into expression of design scheme. The gene model of life cycle assessment properties of structure is established, and the variable length coding is converted to equal length coding to realize the quantitative representation of structure information. The fitness function is established for life cycle assessment of structure with Analytic Hierarchy Process. The improved segmentation genetic algorithm is studied. The gene sequence of design scheme is segmented. Genetic operators such as across and mutate is designed for structure information the segmented gene fragment. Life cycle assessment gene of structure as attribute does not participate in the genetic operation. Design schemes automatic generation is achieved based on improved segmented genetic operators, reflecting life cycle assessment properties of design schemes.
Improved RSA Algorithm and Application in Digital Signature
Authors: Xiao Zhen Jiu , Jiang Zheng Tao , Wang Yong Bin , Chen Hong
Published: January 2015

In order to enhance the operation efficiency of RSA algorithm, a new improved algorithm was suggested in this paper which made some improvements in structure and operation, and it was applied to digital signature. The experiment made comparison between a combinatorial optimization algorithm which combined SMM with index of 2k hexadecimal algorithm and the new algorithm. It shows that the new algorithm reaches a high level in operation speed.
Research of Orange Quality Classification Technology Based on BP Neural Network Algorithm
Authors: Qian Chun Hua , Qiang He Qun , Gong Sheng Rong
Published: January 2015

BP algorithm is a classical neural network algorithm. We analyzed the deficiency of traditional BP neural network algorithm, designed new S function and momentum method strategy, optimized the algorithm parameters. We use the new algorithm in the classification of orange images, take color and shape features as input value, the experimental results proved that our algorithm is faster and the classification accuracy rate reaches to 90%
Research on Automatic Text Classification Algorithm Based on ITF-IDF and KNN
Authors: Chen Rong , Chen Feng , Sun Yi
Published: January 2015

We consider how to efficiently text classification on all pairs of documents. This information can be used to information retrieval, digital library, information filtering, and search engine, among others. This paper describes text classification model which based on KNN algorithm. The text feature extraction algorithm, TF-IDF, can loss related information between text features, an improved ITF-IDF algorithm has been presented in order to overcome it. Our experiments show that our algorithm is better than others.
Research on Gesture Speed Estimation Model in 3D Interactive Interface
Authors: Huang Zhong Zhu , Feng Zhi Quan , He Na Na , Yang Xue Wen
Published: January 2015

Gesture has different speed in the process of movement. To reflect the different speed of the user, this paper presents a gesture speed estimation method. Firstly, we use data glove and camera to establish the relation between the variation of gesture contour and that of gesture speed. Secondly, we build the gesture speed estimation model by stages. Finally, we get the real-time speed of hand motion through this model and complete interactive task. The main innovation of this paper is that we reveal the relation between the gesture contour and speed to lay the foundation for further capture the interaction of user intention. Experimental results indicate that the time cost of our method decreased by 31% compared with freehand tracking based on behavioral models and the 3D interactive system based on our model is of high the user experience.
Research on Polarization Image Fusion Using Tetrolet Transform
Authors: Zhang De Xiang , Yuan Bao Hong , Zhang Jing Jing
Published: January 2015

Tetrolets are Haar-type wavelets whose supports are tetrominoes which are shapes made by connecting four equal-sized squares. Firstly, the magnitude of polarization image and angle of polarization image can be decomposed into low-frequency coefficients and high-frequency coefficients with multi-scales and multi-directions using tetrolet transform. For the low-frequency coefficients, the average fusion method is used. For the each directional high frequency sub-band coefficients, the larger value of region energy information measurement is used to select the better coefficients for fusion. At last the fused image can be obtained by utilizing inverse transform for fused tetrolet coefficients. Experimental results show that the proposed method can detect image features more effectively and the fused image has better subjective visual effect.
Research on the Color Mixingand Embedding of Infrared Detectable Watermark Studies
Authors: Cong Dong Sheng , Feng Liu Ping , Lyu Hui Hui
Published: January 2015

In order to study and broaden theapplication ofinfrared watermark, use the methods of gray componentreplacementto replace some or all of the black ink, get another replacement color. So that make the two colors has same visual effectin the visible light.However,thepresence of differences colors on the content of black ink. UseInfrared detection equipment to analysis two colors findthey existed differences in gray space.Under Infrared can be distinguished.Experiments usingcolor space conversion to achieve GCRalgorithmsand two color using print presses achieve infrared watermark embedding, then get a watermark graphic by infrared detection devices.
Research on the Era Environment of Data Mining
Authors: Zhao Xin , Huangfu Yan Hong
Published: January 2015

Modern society has entered an era of information technology, computer communication and network technology is changing the entire human and social, blowing a lot of information to bring convenience, it also brings a lot of new questions, the first is information overload , it is difficult to digest: the second is difficult to identify true and false information; third is difficult to ensure information security; fourth is the information in the form of inconsistent, difficult to handle, "Faced with these challenges, data mining techniques have emerged, and have a higher frame model security and privacy protection according distributed heterogeneous environments of data mining features, integrated use of new technologies SOA, ontology, WEB services, follow the user-centric concept, data mining system framework proposed an open service oriented. binding domain knowledge of data mining applications, follow the user-centered design philosophy presented to the user for data mining center of the body, on the one hand based on data mining and mining objects to organize data mining algorithms, on the other hand provide effective data mining application solutions for the user based on the application domain knowledge to help different areas of multi-level users to easily select data mining services.
Virtual Combat System Evolution Model Realization
Authors: Qu Ning , Zhang Ning , Li Ying
Published: January 2015

This paper presents the connotation, research purpose and goals of virtual combat system evolution model, studies virtual combat system simulation principle and modeling process, and the evolution modeling method of virtual combat system, presents virtual combat system evolution modeling method based on main body, designs virtual combat system evolution model system structure, summarizes the portfolio level of virtual combat system model, and gives information control relations between virtual combat system models.
A Prototype Selection Method for Synthetic Object Recognition Based on Structural Graph Model
Authors: Zhang Wei , Wang Xiao Jie
Published: January 2015

At present, many popular methods for object recognition are based on regional visual feature vectors which ignore the global structure of the object, leading to the “semantic gap” between image content and its tag. Graph-based structural representation of an object can record regional visual features and global relationships between regions that compose the object. However, the computation complexity of graph comparing limits the application of graph model in object recognition. One method for improving the recognizing speed is to reduce the prototypes in concept space of specific object category. We presented a prototype selection method for sythetic object recognition based on structural graph model using greedy clustering and representative sample selection. Experiments are conducted on a 2-D CAD synthetic object database. And the results show that the prototype selection method reduces the time cost of object recognition greatly with an acceptable loss in accuracy.
A Discovery Technology Based on Distributed Resource Management Domain
Authors: Mao Jun Li , Luo Xiang , Wang Xiao Zhen , Yang Chao Hong
Published: January 2015

Resource discovery is the key of network resource management, which includes multiple aspects, such as resource description, resource organization, and resource discovery and resource selection. For a long time, communication network resourcehas been lack of unified and standardized description, causing users difficult to precisely find related resources in demand. This paper presents a distributed resource query methods based on management domain, including distributed resource query architecture, the basic process of resource discovery, update method,query methods and so on. The method of network resources makes use of collaborative queries to realize network resource discovery according to need.
Combine Trust Management Scheme for BitTorrent Networks
Authors: Li Song Jiang , Liu Yan Heng , Wang Ai Min
Published: January 2015

In BitTorrent network, how to avoid free-riders is an in inevitable problem of improving BitTorrent performance. Using trust management is a trend of P2P transmission. We propose a combine trust management scheme, combining local trust value and trust value from neighbors to calculate a combine trust value. The combine trust value represents the spread of reputation in the BitTorrent network. Through the combine trust value, peers could recognize the free-riders. Experiment results prove that compare combine trust management scheme with local trust management scheme, the combine trust management could avoid more free-riders, thus has better download performance.
Linking Multiple Identities in Online Social Networks Based on Co-Occurrence Analysis
Authors: Liu Dong , Wu Quan Yuan , Han Wei Hong
Published: January 2015

When tackling the problem of mining multiple fake identities which are controlled by the same individual in internet, traditional techniques used to analyze the posted comments using text-based methods. However, these texts are always in colloquial style which make the effect may not be as obvious as expected. In this paper a new multiple identities linking algorithm is proposed based on the fine-grained analysis of co-occurrence degree of user accounts using sliding window model. Finally, a series of experiments show the effectiveness of our proposed method.
Personalized Recommendation Based on Trust and Preference
Authors: Wu Li Hua , Chen Wen Feng
Published: January 2015

Collaborative filtering recommendation is a mainstream personalized recommendation method, which has some flaws in actual application. And there are some inaccurate recommendation results in some cases. Considering the relationship of trust and similarity of user preference, this paper introduces trust to recommendation model and considers multi-dimensional factors of user preference, proposes a personalized recommendation method based on trust and preference. The recommendation method can improve the accuracy of recommendation system. Finally, this paper proves effectiveness of this recommendation method through the experiments.
Reliability Assessment of Digital Protection Software under the Software Module Structure
Authors: Lu Li Fang
Published: January 2015

Today, digital protection has been widely used in the power system.Its reliability directly affects the safety operation of the entire system.However, the current study focused primarily on hardware reliability, less digital protection software reliability study.The purpose of this article is to study digital protection software reliability assessment method based on software module structure. Through the existing digital protection software reliability, performance and agility make quantitative prediction and evaluation, we analye the reliable type of digital protection software.This paper uses a "gray box" approach, namely the use of I-M chain approach. Then we come true the reliability analysis of digital protection software.
Research and Improvement of LEACH Routing Protocol
Authors: Zhai Xue Ming , Yang Liang , Yang Lei
Published: January 2015

LEACH is a classic wireless network routing protocol, the large energy consumption of LEACH cluster heads leads to the load imbalance of network nodes in order to shorten the life of network, the paper proposed an improved LEACH-M protocol to solve the problem, so that the shortest path between cluster heads and base station is formed, finally the NS2 simulation results show that the load balance of network is improved, and the lifetime of network is extended.
Research of Equipment Precise Support System Based on Internet of Things
Authors: Lu Dong Lin , Chen Yu Long , Wang Xiao Long , Liang Hai Long
Published: January 2015

In this paper, conception, structure, key technologies of Internet of Things are described. According to the characteristics and trend of equipment support in informative war, equipment precise support system based on Internet of Things is put forward. Through layering research of precise support system, overall structure of the system is designed, main functions of the system is described in detail, a theoretical basis is laid for development of system.
Research on Thermal Effect Caused by Absorbing Inclusion in Dielectric Irradiated by Pulse Laser
Authors: Huang Cai Hua , Sun Xiao Hua , Sun Yi Hua , Zou Jun
Published: January 2015

The thermal effect caused by absorbing inclusion irradiated by pulse laser is affected by size of inclusions, pulse duration, repetition interval and number of pulse laser. The temperature both in the center of inclusion and the interface between inclusion and dielectric increases firstly with the increase of the size of inclusion, then trends to a constant value when the size is over the critical radius. Pulse duration and repetition interval of pulse change the energy acumulation in inclusion then have influence on the peak temperature in the center and interface. The temperature fluctuates periodically but the overall assumes the trend of increase.
Virtual Package Design and Realization Based on 3D Visualization Technology
Authors: Wang Zhi Qiang
Published: January 2015

It is 3D visualization technology that paves the way for the development of virtual package, making it more convenient, efficient, visually plausible and scientifically more viable for the design and realization of virtual package. In this paper, the author perfectly demonstrates the process to recreate the real-life package design on virtual platform, using 3D design software like 3DSMAX and VRP for the design and presentation of virtual package works.
Performance and Emissions of a Hydrogen-Gasoline SI Engine
Authors: Shi Wei Bo , Yu Xiu Min , Sun Ping
Published: January 2015

When hydrogen is added to a gasoline fueled spark ignition engine the lean limit of the engine can be extended. Lean burn engines are inherently more efficient and have the potential for significantly lower NOx emissions. Thus, the purpose of this paper is to investigate the effect of hydrogen addition to gasoline-air mixture on the performance and exhaust emission characteristics of a spark ignition engine. Six excess air ratios are used ranging from 0.8 to 1.5. The amount of hydrogen added is 18.5% and 30% by energy fraction. The test engine is operated at 1500 rpm. From the experimental observations, the effect of hydrogen addition on thermal efficiency, specific fuel consumption, cyclic variations of the indicated mean effective pressure (IMEP), and emissions of CO, unburned hydrocarbons and NOx are analyzed.
Cloud Storage Virtualization Technology and its Architecture
Authors: Hu Yuan Yuan , Wang Lu , Zhang Xiao Dong
Published: January 2015

Based on cloud computing and cloud storage, this paper discussed three kinds of typical virtualization technology in cloud computing, that is, storage virtualization based on host or server, storage virtualization based on storage devices, and storage virtualization based on Storage Area Network (SAN). In addition, application value of storage virtualization technology was discussed. What’s more, platform architecture model of cloud storage was proposed, and the characteristics of cloud backup were discussed as an example.
Dynamics of Behavior Spreading Driven by Opinion Evolution: Modeling and Simulation
Authors: Gao Ji Bin , Jia Zhen
Published: January 2015

People's opinion and behavior can influence each other and spread on social network through communication and sharing. In this paper, based on the consistency principle of attitude and behavior, we propose a discrete-time dynamical model of behavior spreading, which the individual's attitude towards a behavior is described by a variable called an opinion value. One’s behavior can be changed by the mutual influence and updated evolution of opinion value. We simulate the process of opinion evolution and behavior spreading on a real social network. The simulations suggest that the higher recognition of network group on the behavior, and the stronger individual’s ability on accepting them, the more widely the behaviors spread. Furthermore, the social resilience can inhibit behavior spread to some extent.
MCACM: A Cloud Storage Access Control Model for Multi-Clouds Environment Based on XACML
Authors: Yin Kai Ze , Wang Hai Hang
Published: January 2015

Cloud storage as a popular application in cloud services, are developing from single cloud service provider towards multiple cloud service providers. As a consequence, users need to manage their files from different sources and share in multi-clouds. While the conventional access control models are no longer suitable in multi-clouds environment. Therefore, a multi-clouds access control model based on XACML, named MCACM, is proposed here to implement access control in multi-clouds environment. In this model, cross-clouds access control is enabled through extending standard XACML framework. At last, we implemented a prototype of MCACM, and performance evaluation results show that our scheme is efficient.
The Method Creating UML Model about Heat Pipe Network Data
Authors: Wu Hai Feng , Li Lin Ping , Yang Jin Ming
Published: January 2015

The UML model of database is a frame foundation of developing a database, this paper recommends a way to build data model based on the urban heating pipe networks by using VISIO[1] modeling tools. There are two ways that Use Case Diagram and Static Structure Diagram. The article describes the function of database application system, data structure and relationship on the heating-pipe network. The data structure model makes it more clear and lower redundancy when the developers are developing an application system of database.
Analysis on the Development of 3D Printer
Authors: Yuan Li Mei
Published: January 2015

3D printer market has developed rapidly in recent years, and has been applied in the aerospace, bio-medical, education, food, mold making and other industries. 3D printer not only has its advantages in the aspects of meeting the needs of niche markets and reducing depending on labor etc, but also faces problems in the aspects of the printing material and price, etc. 3D printer will become an important manufacturing method in manufacturing industry in the future.
A Photo-Curing Method to Prepare Biomimetic Micro-Nano Structure of Butterfly Wing Scale
Authors: Wang Wei , Wang Gang , She Ping , Sun Hang , Liu Zhen Ning
Published: January 2015

It has been well-known that butterfly wings possess interesting optic properties. Recently, dendritic micro-nanostructure has been found in the wing scales of butterfly Trogonoptera brookiana, which shows excellent light-trapping effect, especially for the visible light. When light enters such a dendritic micro-nanostructure, it will be trapped and eventually absorbed by multiple reflections to generate heat. It is desirable to prepare a biomimetic structure resembling the micro-nanostructure of the butterfly wing scale, which may lead to a new material that can potentially improve the light utilization rate of solar thermal heater and other similar applications. However, a convenient method to make such a structure in large scale is still lacking. Herein, an easy and handy approach has been developed to prepare biomimetic dendritic structure. The starting material is negative photoresist, a chemical reagent which is widely used in photography. A simple device that can adjust the intensity and interval of ultraviolet illumination has been designed and set up. A periodic structure has been achieved via photo-curing with ultraviolet light and the ratio of illumination time has been optimized.
Adsorption Effect of Iron-Aluminum Binary Oxide on Copper Ions
Authors: Dong Yu Liang , Pang Xue , Ren Li Ying
Published: January 2015

As its highly adsorption ability, iron-aluminum binary oxide (Fe-Al binary oxides) can adsorb heavy metals in the environment. The objective of this study was to tese the adsorption effect of Fe-Al binary oxide on heavy metal copper in different conditions. Result showed that with the temperature increased, the adsorption amount of Cu by Fe-Al oxides also increased. The experimental results can fitted well with Freundlich equation; When pH < 7, the adsorption quantity increased with pH increasing, when pH > 7, adsorption quantity is close to a constant value. At the beginning of the reaction stage (0~120 min), adsorption of Cu increased rapidly, then adsorption quantity of Cu gradually become smaller, and eventually reached balance.
Numerical Analysis of Hot Stamping Mold Cooling System Based on FLUENT
Authors: Yan Li Jing
Published: January 2015

Cooling is very important in the process of hot stamping process of a link, directly affect the mechanical properties and service life of the forming parts. Mold cooling system is effective and reasonable, therefore, is the important indicators of the hot stamping process performance. This paper deeply analyzes the hot stamping process and heat transfer theory, summarizes the main factors affecting mold cooling system performance. At the same time, the fluid analysis software FLUENT is adopted to U artifacts a numerical simulation of the hot stamping process analysis of mold during the cooling process, the work piece temperature field change, for the hot stamping mold cooling system design to provide theoretical reference.
Characteristic Study on Parylene-C Film for Thermal Isolation on Chip
Authors: Ji Xu , Wang Wei , Song Xiang Bo , Li Hai Li , Luo Xi
Published: January 2015

This paper deposited parylene-C films as thermal isolation filling material on the micro-trenches. The stress characteristic and the conformal coating characteristic of the parylene-C films were analyzed. The small stress and the good conformal coating are helpful for film material to decrease their influences on the mechanical and electric performances of the devices. The thermal isolation performance experiment was performed. The results showed that the temperature in the inside part of the testing device with a heating resistance is obviously higher than that in the outside part, separated by the thermal isolation structures coating with parylene films.
Investigation on the Electronic Structure and Optical Properties of ZnO Nanofilms
Authors: Zhang Rui , Zhao Hong Sheng , Chen Huan Ming
Published: January 2015

The electronic structure and optical properties of wurtzite ZnO nanofilms with different thickness are investigated systematically by using the first-principles approach. The results indicate that the valence band properties of the ZnO nanofilms are mainly determined by the Zn: 3d state and O: 2p state. And its conduction band properties are determined by Zn: 4s state and Zn: 4p state. The band gap decreases with the thickness of nanofilms increasing in [0001] direction. It is also found that the interband transition absorption edge of ZnO nanofilms decreasing from 5.5 eV to 2.7 eV with the thickness of nanofilms increasing from single layer to five layers. The interband transition of reflection spectrum occurs mainly in the range of 10 eV to 18 eV, which is in line with the ionic bonding characteristic of wurtzite ZnO.
Design Assistant Decision Model for Parafoil Precise Airdrop
Authors: Feng Wang , Zhao Jun Feng , Ma Shi Yang
Published: January 2015

Decision capacity and command level is essential for accurate aerial delivery of parafoil. In this paper, we according to the system theory and the modular scheme, put forward the parafoil precision airdrop aided decision model consist ofaircraft flight route model,parafoil maneuvering performance model,high altitude wind field characteristic model, landing terrain environment model, the enemy threat situation model, complex electromagnetic environment simulation mode. Andwe focuses on the aircraft flight route model, landing terrain environment model and the simulation model of high altitude wind. The model can providecertain auxiliary decision information to airdrop commander; can also be used to other specific precision airdrop work.
Phosphorus and Iron Distribution in the Sediments of the Yellow River
Authors: Ma Xu Yang , Yang Xiao Hong , Wu Ya Li , Han Ming Mei , Yang Hong Wei
Published: January 2015

Sediment was important storeroom of pollutants and acted as the"source"and the"sink"role [1-2]. Phosphorus not only was a important biogenic elements but also a major limiting factor of water eutrophication.Primary productivity of water bodies was effected by phosphorus migration and circulation in interact of sea-land[3]. As we all known,crustal abundance of iron was 6.71% and ranked fourth, it was trace elements that played an important role in activities of human life, meanwhile ,growth of planktonic algae was limited by iron. Iron has a strong absorption features because of its oxide surface features .Circulation and transformation of phosphorus were effected by geochemical cycling of iron[4-6]. Studies have shown[7-8]that total of phosphorus and iron can be used as an important indicator what evaluated the degree of pollution. Released phosphorus of sediments was an important factor that effected nutritional status of water bodies. TP through physical,chemical,biological effected were combined with andiron and other minerals. So, determinating TP and TFe of sediment and analyzing its relevance were very important, it could further reveal the pollution status of water and analysis the pollution trends .
Research on the Piezoresistive Properties of Conductive Silicone Rubber under Water Pressure
Authors: Wang Peng Yu , Li Bin , Quan Wang Xian
Published: January 2015

The conductive silicon rubber samples have been prepared in different filler ingredients, the platform is builded for testing the piezoresistive characteristics of conductive silicon rubber when the material is under water pressure and the test methods are designed, the body piezoresistive properties and surface piezoresistive properties under the water pressure within a certain range are studied respectively. The results show that, the sample of 6% acetylene black/2% nanoSiO2 blends exhibit the best piezoresistive performance when the samples are under water pressure, the piezoresistive properties of the material can be improved with the increase of the thickness of the materials (2mm-4mm), and the conductive silicon rubber used for the pressure-sensitive materials of piezoresistive gauge is feasible.
Researches on Hydrogel Based on Environmental Minerals
Authors: Yang Fu Sheng , Lin Min Qun , Wei Ben Long , Zhang Ming , Zhou An Ning
Published: January 2015

Environmental minerals, such as bentonite, kaolin, talc, attapulgite and diatomite, have abundant micropores and surface active groups. Preparation of hydrogels based on the minerals have been drawing more and more attentions worldwide because of improved salt resistance, water absorption rate, gel strength, thermal stability, water holding capacity due to addition of the minerals. Current investigations mainly focus on water absorption performance of hydrogels, insufficient concerns about porous structure, cohesiveness, surface electrical characteristics, corrosion resistance and thermal stability were paid. Novel preparation techniques with aid of ultrasonic treatment and microwave irradiation, enhancing in-situ grafting and copolymerization of biomass cellulose in mineral structures, as well as further researches on absorption mechanism of environmental mineral based hydrogels are becoming meaningful trends.
The Adhesion and Antimicrobial Properties of Nano Silver/Chitosan Composite Membrane in Orthogonal Research
Authors: Qin Peng , Yu Gang , Chen Pi Mao , Qin Chuan Xin , Ou You Jun
Published: January 2015

Research the nanosilver and other composite materials with the chitosan in the best composition with orthogonal test method. According to the best use concentration of nanosilver and composite materials carry out the orthogonal experiment. By using the ultrasonic method test the adhesion strength between chitosan membrane and the breeding net through calculating the loss of the membrane. With bacteriostatic circle method to determine the bacteriostatic effect of membrane. The results show that the main factors influence the adhesion of membrane and the effectiveness of bacteriostatic is adhesives and nanosilver. The orthogonal experiment results show that the optimum conditions of film forming as follows: the adhesion agent A3% , adhesion reagent B3% ,nanosilver solution 2% nanoantibacterial powder 3% ,tea saponin solution 60 mg/L. Under these conditions, the loss of the membranewas14.6%, the inhibition zone was 2.35cm. Orthogonal test was applied to the ratio of composite materials can get the best composite columns. Creating a better performance of target product and has a promising prospect for practical application.
The Development of Fiber Reinforced Thermoplastic Composite Materials from German, Japan and United States Based on Information Processing Technology
Authors: Wang Wen Huan , Zhao Qi Cheng , Chang Hui Yun , Wang Jing Chang
Published: January 2015

This paper compared three representative traditional industrial countries, the United States, Japan and Germany, the research and development and usage of thermoplastic composite. At the same time discusses the future research and application of the thermoplastic materials.
The Experimental of the Physical Properties of Inorganic Materials
Authors: Zhang Feng Qing
Published: January 2015

s. The theory teaching of the physical properties of inorganic materials in classroom has the characteristics of strong theoretical and boring content, so students prone to boredom. This course covers the mechanical deformation, brittle fracture, intensity, thermal and electrical performance of inorganic materials. Furthermore, the environmental teaching is just verification tests, lacking of the phenomenon of creativity. As a result, it’s of great significance to reform the curriculum.
Critical Soldering Interconnect Technology in SMT
Authors: Hu Xiao Ming
Published: January 2015

this paper introduced the important soldering interconnect technology in SMT. In electric product manufacturing process, sometime we must place components in through-hole ways , then we use wave soldering. Wave soldering is used for both through-hole printed circuit assemblies, and surface mount. As technology changing very soon, the through-hole components have been largely replaced by surface mount components, this time ,Reflow soldering is the most common method of attaching surface mount components to a circuit board,but not wave soldering also reflowing, we must focus on wetting , It quantifies the wettability of a solid surface by a liquid .wetting angle is a the important quantity (also called contact angle).it can judge the quality of solder joints.
Transformer Region Customer Information Detection System
Authors: Wu Zhao Ping , Yang Jun Jie , Lou Zhi Bin , Yao Jin Ming , Fan Ru Sen
Published: January 2015

Aim at solving the electricity customer unclear ownership problems in some old city area, the transformer region customer information detection system was designed, using low voltage power line carrier (PLC) technology to detect transformer of the connectivity of concentrator and the collector within their respective jurisdictions, and further determined the dependencies of the electric power customer and concentrator, displayed results in the information management server. The system consists of the customer information detection terminal and the customer information management software. The experimental results show that the system can actually solve the issues of mixed customer information under the complex line loss problem.
Underwater Target Detection Based on Electric-Field Sensor Line Array
Authors: Wang Xiang Jun , Liu De Hong , Zhu Wu Bing , Ji Dou
Published: January 2015

The electric-field, caused by corrosion and prevention of corrosion method was used to overcome the deficiency for acoustic detection system in underwater target detection. The research on electric-field detection was based on electric-field sensor linear array and digital signal processing technology. Firstly, the electric-field distribution feature was simulated by electric-dipole model in shallow sea. The electric-field sensor vertical line arrays were laid regularly to obtain electric-field signal. Then, the generalized likelihood ratio (GLRT) method was used to process target detection and parameter estimation. Finally, the simulation experiment was done and indicated that the method could accurately realize parameter estimation on target initial position, velocity and direction, etc all when the signal-to-noise ratio (SNR) was greater than 0dB. The error became larger as the SNR reduced. The GLRT still could detect target when the SNR reduced to-10dB and partial parameter estimation error became larger.
Application of Single Chip Microcomputer Technology in the Measurement of the Motion of the Rod Body
Authors: Jiang Jun Hai , Wang Xian Wei
Published: January 2015

Introduce a kind of STC89C52 to control the core motion rod body measurement system, the system can be measured the movement of the length of the bar body, a number were detected, calculate the cumulative length of the rod body of the. The system comprises a data acquisition unit, a calculation processing unit, voice broadcast unit, LCD display and keyboard operation unit etc. The system has achieved good results in actual measurement, after the actual test device, this system can realize forward, fast, accurate measurement, it has very good practicality.
Hair Detection in Mushroom Based on Image Processing
Authors: Deng Zhan Si , Li Tong Qiang
Published: January 2015

Nowadays,artificial recognition is widely used in the mushroom inspection system, however, it depends on subjective judgment of inspectors.Therefore,the testing personnel's experience, technology and other factors will affect the objectivity and accuracy of test results.Commodity inspection system need a high-speed, objective and accurate method for the on-line hair detection in the mushroom.On the basis of summary of domestic and foreign research, this paper studies the target identification and feature extraction techniques based on computer vision, conducts a feasibility study for the real-time hair detection system.
A Collision Detection Algorithm in Virtual Assembly Technology
Authors: Qiang He Qun , Qian Chun Hua
Published: January 2015

The collision detection problem is a classical problem in computer graphics research field. It has become a hot topic in recent years with the development of virtual assembly technology. And accurate collision detection is crucial to improve the reliability and authenticity of virtual assembly. In this paper, we designed a collision detection algorithm with a pre-segment strategy based on OBB-Tree algorithm, took advantage of the shape characteristics of component model, used a smaller bounding box for operation. Experimental results showed that the efficiency of the algorithm is about 10% higher than that of traditional OBB-Tree algorithm.
Realization of an Execution System of Distributed Performance Testing Based on TTCN-3
Authors: Liu Shuang Mei , Liu Xue Mei , Liu Yong Po
Published: January 2015

An execution system of distributed performance testing is designed in this paper, which provides a mechanism of node communication, test script deployment, test scheduling, execution-driving and test result collection in distributed environment. A workload model is established, by which testers can describe the performance testing requirement. A performance testing framework is given, which simulates user behaviors in real environment based on virtual users so as to generate workload from the system under test (SUT). It can control the execution of virtual users by TTCN-3 standard interface. After executing the performance testing, test report is generated by extracting log. A method of generating performance test-case is studied by reusing functional test scripts. By executing performance testing on an online bookstore, this paper demonstrates the availability of the method of reusing TTCN-3 functional test scripts and the capability of distributed performance testing system established.
Research on the Carrier Aggregation Application in the Blind Detection of PDCCH
Authors: Li Zeng , Li Xiao Wen , Xu Li
Published: January 2015

This article expounds the latest developments of key technology about carrier aggregation of LTE-A, and introduces cross carrier scheduling. Then it mainly studies the control signaling, reconfiguration message sent from upper layers defined by 3GPP protocol, and Physical Downlink Control Channel (PDCCH) blind decoding method which supports cross carrier scheduling. Finally, with correct simulation results, it shows that the method meets the requirement of 3GPP, and provides a theoretical basis for realizing detection of PDCCH in LTE-A system.
Mechanical Seal End Faces Friction Condition Monitoring Based on Particle Filter
Authors: Zhang Jun Kai , Zhang Er Qing , Ge Zhen Di , Fu Pan
Published: January 2015

The non-contact mechanical seal end faces opening friction condition detection and the measurement of film thickness when the end faces is just-lift-off, which are always key problems for scholars engaged in sealing industry for many years, but there is no effective solution. Acoustic emission (AE) signal generated in the running process of mechanical seal end faces has a plenty of information about the faces contact state. According to this, the thickness measurement of mechanical seal and opening condition monitoring technology by using particle filter are put forward based on the acoustic emission signal. Acoustic emission sensor is installed in the stationary ring seat, used for the indirect outer detection of the dynamic and stationary rings opening condition. The acoustic emission signals are processed by particle filter technology, and then the signal features are extracted in time domain, frequency domain and wavelet packet energy. A BP neural network model is established, the features of signal characteristic used as input of the model. It is finally realized that the mechanical seal end faces opening condition was recognized and the film thickness was measured. Eddy current sensor is installed inside the stationary ring and used for direct measurement of film thickness and verify the results got from the BP neural network. Through the experiment, this method is practical and effective, and which can be used in the monitoring of mechanical seal end faces working condition in industrial field.
An Indoor Multi-Function Environment Detector Model
Authors: Luo Heng , Jin Ning Jie , Ye Xiao Yan , Li Jun Chen , Gao Lu
Published: January 2015

Modern people spend more than 90% of their life indoors and therefore the indoor environment quality has great impact on the body health and working efficiency of human beings. A series of detectors thus been developed to evaluate the indoor environment quality. Nevertheless, these devices are either expensive or too simple. In this paper, a portable detector model, basing on the Lego Blocks Principle, is proposed. Users are able to select sensing modules according to their preference based on the precision requirements, price constraints and size limitations before piling them together like blocks to realize the multi-parameter detection. The measuring results are sent to the terminal mobile phones or remote server for future procession.
Reliability Analysis of CNC Machine Tools Based on Fuzzy Theory
Authors: Tao Li
Published: January 2015

There are many factors influencing the reliability allocation of CNC machine tools and some are difficult to analyze quantitatively, a comprehensive reliability allocation method is proposed using interval analysis, fuzzy comprehensive evaluation and analytic hierarchy process. Many influence factors were considered and endowed with different weight respectively according to the influence degree. In this paper, a reliability allocation model is proposed for CNC machine tools, which used interval number instead of real number to express uncertain information. It could make use of the field test information and experts’ experience comprehensively. Finally, the application of this method is illustrated with an example, and the results showed that the allocation method is feasible and effective for the reliability allocation of CNC machine tools.
Fuzzy Tuning PID Control of the Rolling Mill Main Drive System
Authors: Fan Li Ping , Liu Yi
Published: January 2015

The main drive system using for four-high mill is usually a double closed loop DC motor speed regulating system. Generally, the speed controller and current controller are PID controllers, and the parameters of controllers are determined by the engineering design method. Once disturbance occur, the control effects are often just passable. In this paper, fuzzy logic is used to set the parameters of the speed PID controller, so as to improve the disturbance rejection ability. Simulation results show that the fuzzy tuning PID controller can give better control effect than the regular control.
Vibration Characteristics for Planetary Geared Systems with Plastic Gears
Authors: Li Jian Ying , Hu Qing Chun , Duan Fu Hai
Published: January 2015

A torsional dynamic model and testing model for planetary geared systems are established to study the effects on its vibration characteristics as substituting plastic gears for steel ones successively. The dynamic model is solved by using variable step Runge-Kutta method and the vibration testing experiments for four kinds of combined planetary geared systems are carried out under different rotation speed and load torque. The numerical and experimental results show that the high frequency spectra are suppressed effectively as substituting plastic gears for steel ones. The gear mesh dynamic load and vibration intensity caused by the meshing fundamental frequency and side-frequency reduce markedly when the plastic ring and planet gear substitute for steel ones together. The numerical simulations have a better consistency with the experimental results, which verifies the correctness of the conclusions.
Fuzzy PID Parameters Self-Tuning in the Application of the Furnace Temperature Control System
Authors: Guan Zheng Qiang , Luo Xiao Ming , Song Le Peng
Published: January 2015

According to the set temperature, the parameter self-tuning fuzzy PID control algorithm is used furnace temperature automatic control and fuzzy PID control process to make use of the MATLAB simulation. Simulation results show that compared with conventional PID control, the parameter self-tuning fuzzy PID control algorithm improves the system response, shorten the adjusting time, enhances the disruptive, demonstrate the superiority of the fuzzy PID.
Modeling and Simulation of Kollmorgen Motor Movement Control System Based on SimScape
Authors: Sun Jun , Qian Bin Bin , Qin Xian Jun , Huang Yuan
Published: January 2015

To verify and analyze the dynamics model of servomotor and improve the efficiency of modeling and analysis, we research system of modeling and simulation on kollmorgen AKM41H servomotor in SimScape. According to the driving principle and mathematical model of DC servomotor, Simulink combined with SimScape and Solidworks part will conduct Control system simulation and analysis. By analyzing the frequency curve, we know that dynamics model of Kollmorgen servomotor is accurate. Semi-physical simulation based on SimScape, the angle of motor shaft can be fast and accurate to get the prespecified value. Parameters of feedback control system are selected reasonably, adjust the motor shaft’s speed so that it reduces to zero band. Research shows that SimScape combined with Solidworks take semi-physical simulation experiment. It can support simulation that is different complex engineering project. Compared with the traditional simulation model is more practical and analysis and modeling is more efficiency.
Design of the Independent Rescue System Based on the Passive Sound Source Localization and Machine Vision
Authors: Dong Sheng , Zhao Ai Guo , Xing Li Yun , Wang Fei , Song Fang Lei , Hao Lian Xue
Published: January 2015

The purpose of this paper is to design a family or battlefield independent rescue system which is based on passive sound source localization and machine vision, The system consists of five modules: the sound acquisition and processing module based on FPGA, image acquisition and processing module based on TMS320DM6437, video capture and communication control module based on TMS320DM355, motion control module based on MSP430F149, PC server and smart handheld mobile client. It can track target person who need help automatically by recognizing his voice and image, to provide emergency medicines, communication tools, and transmit real-time video information to a server on PC and a mobile client on Andriod platform by wireless network, and be controlled remotely.
Design of Intelligent Wagon which Can Automatically Enter into Garage Based on STC89C52
Authors: Wang Ting
Published: January 2015

STC89S52 single-chip microcomputer is the control core of intelligent wagon which can automatically enter into garage, which can control direction and speed of the wagon through collection and processing of signals from various sensors on the route in the forward direction, and thus can realize some functions including rapid and stable running through automatic recognition of black guiding line as well as entering into garage through recognition of light source. In addition, voice and light prompting device is used to prompt the action of entering into garage and the exact heading direction of the wagon, namely due west. Moving and turning of the wagon is driven by DC motor, and motor should be driven by L298N driving chip, which has high control accuracy and flexibility in turning. LCD1602 screen is used to display time of running and angle of turning. In addition, design, programming and program debugging for the entire control software are carried out, and the final integration of software and hardware can be realized, based on which intended functions of the wagon can thus be realized.