bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on HWSN Node Covering Algorithm
Authors: Yao Yu Xian
Published: October 2014

This paper first introduces the types and characteristics of HWSN, expounds its typical architecture, through comparing with homogeneous wireless sensor network, the performance of HWSN is quantitative calculated, analysis results show that HWSN can improve the reliability of data transmission, reduce the energy consumption of data transmission, reduce the delay of data transmission, and with the increase of network scale, highlight the advantages of heterogeneous networks. HWSN covering algorithm performance evaluation indexes are given finally.
A PVP-Based Quartz Crystal Microbalance Sensor for H2S Detection
Authors: Wu Mei , Xie Guang Zhong , Zhou Yong , Tai Hui Ling
Published: October 2014

Hydrogen sulfide is a typical toxic, inflammable gas. The detection of H2S is crucial in the areas of oil, natural gas and so on. However, studies on H2S gas sensors at room temperature were seldom reported. In this study, Quartz crystal microbalance (QCM) sensors have been utilized, and PVP film were prepared on the QCM by airbrush method with different airbrush volume for H2S detection. The results showed that the PVP film with airbrush volume 0.2ml exhibited a better sensing response to H2S gas. Besides, sensitive characteristics parameters, i.e. selectivity, stability, linearity and sensitivity of prepared sensors were studied for comparison. The relative sensing mechanism associated with SEM pictures was studied as well.
The Implementation of Information Sharing Method Based on XML
Authors: Gao Chen  Ping , Sun Xi An
Published: October 2014

With the development of information technology, people will be faced with a lot of difficult problems that how to implement information sharing between different management information systems. This article not only described about XML and SOAP technology theoretically, but took the example of the management system of university logistics service and warehouse management system. It also analyzed and implemented the principle of shared data communication method between heterogeneous systems.
The Key Technology Research of Spatial Data Crawl Based on Web
Authors: An De Zhi , Wu Guang Li , Lu Jun
Published: October 2014

With the rapid development of Web technology, provides abundant information for people, at the same time bring a lot of information redundancy. How to quickly locate the user requirements, is currently one of the common problems in the network retrieval, especially in the field of space information. Spatial data mining has caught more and more scholar's attention. With the rapid development of computer network technology, how to carry on the spatial data mining on the Internet or Intranet, namely how to make Web based spatial data mining is a new research field of SDM, is also one of related scholars increasingly focus on research topics. This paper mainly studies and summarizes the application prospect of the technology of spatial data crawl based web.
Effects of Fe and P Additions on Microstructures and Properties of Cu-Cr-Zr Resistance Spot Welding Electrode Alloy
Authors: Shuai Ge Wang , Fang Ping , Liu Ze Min
Published: October 2014

In this paper, the effects of contents of Fe and P on the microstructures and properties of Cu-Cr-Zr resistance spot welding electrode alloys have been studied by means of electrical conductivity and hardness measurements and optical microscopy. By the addition of 2.5%Fe and 0.03P%, after being aged for 6h, the Cu-Cr-Zr-Fe-P alloy has the highest hardness of 125HV. At this time, the electrical conductivity of alloy is 60%IACS. The addition of 0.1%Zn contributes very little to hardness and electrical changes.
Research on Multi Agent Data Acquisition and Processing Technology of Distributed Network
Authors: Gao Ming Jun , Zhang Guo Yi , Yang Hai Cheng
Published: October 2014

In this paper, it proposed the function structure of distributed network data acquisition and processing system; based on the analysis of Agent, Agent principle and functional module, according to the characteristic of the servo control system fault diagnosis which is the electro-hydraulic position of the electrical and mechanical equipment, it puts a data acquisition and diagnosis system of Agent network structure, the specific function of the dynamic monitoring control Agent and fault identification Agent, it establishes their models and discusses the multi Agent coordination mechanism, the task decomposition and the control strategy of fault diagnosis.
A Preliminary Discussion of Division Algorithm on Digital Matrix
Authors: Li Feng Xia
Published: October 2014

In this paper, it takes digital matrix on the integral ring as an example, to investigate that the division algorithm can work in the scalar matrix, row matrix, invertible matrix, the same type of matrix, and the general matrix. Secondly, the conclusions of division algorithm are extended to the general number field.
An Improve Firefly Algorithm and its Application in Permutation Flow Shop Scheduling Problem
Authors: Su Fu Lin , Li Yue Guang
Published: October 2014

In this paper, according to the characteristics of permutation flow shop scheduling problem. A Novel Firefly Algorithm was used to solve the permutation flow shop scheduling problem, the algorithm was experimented and the experimental results show that the new algorithm to be successful in locating multiple solutions and better accuracy. The experimental result demonstrates that the Improve firefly algorithm can get better solutions to permutation flow shop scheduling problem.
Digital Signals Processing in the Application of the Watermark
Authors: Feng Jun Ying , Liu Lei
Published: October 2014

Watermark technique is one of the technologies of digital product property rights protection. This article from the basic principle, implementation, application, the experimental results were introduced from the aspects such as watermark technology, and analyzes the digital water marking technology based on singular value decomposition.
Effects of Shape of Closed Space on Agent Motion
Authors: Liu Zhen Zhen , Wang Xing Yuan , Wang Mo Gei
Published: October 2014

The moving of a population of agents in a closed rectangular cell is emulated by adding the bouncing of the agents at boundaries and the remembering of end boundaries to a basic model, in which only the alignment rule is used. The agents herd in only a few clusters, which move asymmetrically along the long side of the cell. The effects of the end-boundary information holding time , noise strength and number of agents on the formation and turning of the cluster are investigated. The results show that, the formation time of the cluster decreases with , but increases with and ; the turning time of the cluster slightly increases with and , but nearly does not change with .
Biodegradation of Direct Red 28 and Direct Yellow 12 by a Novel Bacterial Consortium
Authors: Zhu Ling Yu , Xie Xue Hui , Liu Na , Jiang Hong , Yang Fang , Nguyen Thu Hien , Liu Jian She
Published: October 2014

Studies were carried out on the decolorization of Direct Red 28 (DR) and Direct Yellow 12 (DY) by developed bacterial consortium. Effects of pH, temperature, and NaCl concentrations on degradation were studied. GC-MS was used to detect the intermediates produced in the effluents of anaerobic step. The optimum pH and temperature for the degradation of DR and DY were pH 7 and 6, and 37°Cand 45°C, respectively. We observed the peak of benzenamine in GC-MS analysis. The products formed during the reduction of DY12 were benzenamine and 2-Amino-1-hydroxybenzene. The results showed a complete degradation of DY12 by the bacterial consortium.
Sufficient Conditions of H-Matrix
Authors: Zhang Ming Da
Published: October 2014

Generalized strictly diagonally dominant matrix is very important in computing mathematics and matrix theory, many articles are searching simple and practical identification of generalized strictly diagonally dominant matrix. In this paper, using the concept of diagonal dominance, some sufficient conditions for generalized strictly diagonally dominant matrices are given.
The Identity between the Real Number and Order one Matrix
Authors: Lu Yan Xia
Published: October 2014

In the calculation or certification of the matrix, it often thinks of order one matrix as a real number. However, there is no strict proof of that in the algebra textbooks.This paper gives the proof of the identity between order one matrix and the real number from the angle of the equivalence relationship.
The Image Fusion Algorithm Based on Rough Neural Network
Authors: Deng Ming Hui , Li Zhan Cheng , Li Yan Jun
Published: October 2014

This paper describes rough neural network which consists of a combination of rough neurons and conventional neurons. Rough neurons use pairs of upper and lower bounds as values for input and output. In some practical situations, it is preferable to develop prediction models that use ranges as values for input and/or output variables. Integrating rough set theory with neural network theory, a novel information fusion method based on rough neural network is proposed to fuse the different-source images in agricultural robot. It is used to fuse infrared and visible images in order to take full advantage of the complementary information between infrared and visible images. Experimental results show that the fusion effect and speed are both better than standard wavelet transform and the conventional neural network.
Using Sample and Multilayer Compressed Counting Bloom Filter Algorithm to Realize Elephant Flows Identification
Authors: Bai Lei , Li Dong Min
Published: October 2014

It is very important in developing effective and efficient traffic engineering schemes for identifying elephant flows. In this paper, according to the base idea of Sample and Hold, a new algorithm is proposed to realize elephant flows identification. Compare to the original sample and hold algorithm, our algorithm save storage space and reduce false positive by handling large flows firstly, using Scalable Bloom Filter to identify sampled flows and using Multilayer Compressed Counting Bloom Filter to count flows. The theoretical analysis and the simulation result indicate that under the condition of existing some tolerable measurement error about the length of flows, our algorithm can identify elephant flows accurately, which reduce the storage space and improve the processing speed efficiently.
An Improved TFIDF Algorithm in Text Classification
Authors: Xu Dong Dong , Wu Shao Bo
Published: October 2014

Term frequency/inverse document frequency (TF-IDF) is widely used in text classification at present, which is borrowed from Information Retrieval. Based on this conventional classical TF-IDF formula, we present a new TF-IDF weight schemes named CTF-IDF. The experiment shows that the improved method is feasible and effective. Furthermore, from the subsequent evaluations using 10-fold cross-validation, we can see the CTF-IDF greatly improves the accuracy of text classification.
Linear Feature Detectionin Images
Authors: Zeng Yu Ju , Chen Ming Hui
Published: October 2014

Linear feature detection in digital images is an important low-level operationin computer vision that has many applications. In remote sensing tasks, it can be usedto extract roads, railroads, and rivers from satellite or low-resolution aerialimages,which can be used for the capture or update of data for geographic information andnavigation systems. In addition, it is useful in medical imaging for the extraction ofblood vessels from an X-ray angiography or the bones in the skull from a CT or MRimage. It also can be applied in horticulture for underground plant root detection inminirhizotron images.
Numerical Simulation of the Basketball Flight Trajectory Based on FLUENT Fluid Solid Coupling Mechanics
Authors: Pan Yan Hong
Published: October 2014

The calculation of basketball trajectory involves the elastic-plastic mechanics and aerodynamics theory. Besides the deformation of basketball flight, the flight is a complex fluid solid coupling process. If wanting to simulate the flight trajectory of basketball accurately, it must consider the effect of flow field and solid fluid solid coupling field. In order to calculate the flight trajectory of basketball accurately and improve basketball shooting speed and posture training efficiency in the training process, this paper uses the FLUENT to simulate the basketball flight trajectory. Combined with the aerodynamic theory we established the mathematical model of basketball flight. Through the numerical simulation we calculate the velocity field and the monitoring point deformation curve of basketball flight, it provides a new method for computer technical training for basketball players.
Research on Infrared Imaging Modeling and Simulation of Armored Vehicles
Authors: Li Ni , Liu Qing Hua
Published: October 2014

Real-time infrared imaging technology with high fidelity is greatly desired in current simulation systems. An integrated infrared imaging simulation system including infrared radiation characteristics whose model was established by modeling different components of an armored vehicle respectively, atmospheric transmission effects and infrared sensor effects that mainly comprises frequency domain effects and spatial effects was established in this paper. The final infrared image can be generated by taking advantage of the simulation system. The simulation carried out in this paper has proved the validity and effectiveness of the established models, which could be of great significance in satisfying the requirements of dynamic infrared image generation in a photoelectric warfare simulation system.
Study on Global-Piecewise Fitting for Modal Parameter Identification
Authors: Wang Feng Li
Published: October 2014

Based on the global orthogonal polynomial algorithm, a global-piecewise fitting method for eliminating affections of modes outside of fitting bands is proposed. Both lower and higher modes outside of the fitting band are analyzed and processed. The frequency response data are revised by means of modes in two frequency bands close to the fitting band, and a curve fitting model is derived. Simulation results indicate that the proposed method possesses higher precision than the general rational fraction polynomial algorithm.
Design and Implementation of Teaching Management System Based on Short Message Service Platform
Authors: Du Dong Ju , Shao Hai Long
Published: October 2014

Based on the widespread application of the value-added service of Short Message Service (SMS) and demands of teaching management in universities, an SMS system platform for teaching management was designed and built. Software development for the system platform in .NET environment was realized. SMS service process, system architecture, function and characters of the system platform were described.
In Situ Pollen Germination and Artificial Pollination Compatibility in Cassava (Manihot esculenta Crantz)
Authors: Lai Hang Gui , Chen Xia , Chen Zheng , Zhou Ya Qiu , Ou Wen Jun , Li Kai Mian , Ye Jian Qiu , Chen Song Bi
Published: October 2014

Cassava cultivars are self-compatible, sufficient pollination and fertilization are important factors affecting the rate of fruit set and fruit quality, but the effects of compatible pollination relationships on cassava pollen development and fruit set are poorly understood. In the present study, in situ pollen germination and compatible relationship were investigated by using self-pollination and cross-pollination between two cassava cultivars (SC5 and SC7). The observation in situ pollen germination was carried out with toluidine blue staining method under the fluorescence microscope. The result shows that after self-pollination for 20 min, the pollens, released from SC5 anthers, started to produce pollen tubes and the maximum germination rate (GR) was 39.2%. It cost 60 min for the pollen tubes carrying sperm cells to penetrate through the pistil extracellular matrices of the transmitting tract to the ovary. However, after cross-pollination for 10 min, the pollens started to germinate and maximum GR was 66.8%. It took 30 min for the pollen tube trip to reach ovary. Additionally, the analysis of fruit set indicated that pollination compatibility in cross-pollination was significantly higher than that in self-pollination. This work provided cassava cross breeding a clue that foreign pollen may facilitate fertilization and increase fruit set.
Design of Online Teaching Management Platform Based on Android Internet APP Technology
Authors: Zhang Wen Rui
Published: October 2014

Using the Android Internet APP and JAVA technology to build a new teaching management platform, the platform has the basic function of the Web server, and students can easily real-time browsing and querying various teaching information from the mobile phone. The platform adopts B/S framework and MVC software as the development environment to layout technology platform by using the Android APP, so the platform has good information querying and resource sharing function. In order to verify the effectiveness and reliability of the platform, we the number of the platform’s data transmission, flow use and flow queries can be real-time counted, which can obtain the platform operation curve and statistical results under three kinds of conditions, so the results can be seen that the platform of data transfer and flow usage are more stable in different period of time, it is no big fluctuations and complies with the design requirements, to provide technical reference for the research of students mobile phone internet teaching.
Research on Problems and Countermeasures Existing in the Process of Autonomous Learning under the Network Environment
Authors: Li Yue
Published: October 2014

With the mature Internet technology gradually, the traditional education methods cannot meet the needs of people to learn, and independent learning based on the multimedia teaching resources and the network environment become important development trends. Starting with the concept of autonomous learning under the network environment, this paper expounds the problems existing in the process of autonomous learning under the network environment, and put forward the corresponding solution strategy to solve these problems.
The Design and Research of Electronic Schoolbag Learning Environment Take "Science of Eyes" of the Science of Primary School for Exam
Authors: Peng Pai , Zhong Yong Jiang , Zhang Yu Han
Published: October 2014

With the development of information technology, electronic schoolbag has become a hot topic of the broad masses of teachers and students, however, its application in the teaching not widely carried out, it is just exploratory. The biggest obstacle is the lack of the software environment and resources environment of electronic schoolbag in the application of classroom. How to design electronic schoolbag, provide an ideal learning environment for students, is the primary problems of the application of electronic schoolbag in the learning environment. This article is based on the functions and characteristics of electronic schoolbag, aiming at the problems existing in the learning environment, propose the overall design model of electronic schoolbag learning environment, analyze its features are in detail and take primary school science for example, provied concrete application case and the actual application result. It has important practical significance for the construction of electronic schoolbag learning environment and the design of teaching activity in electronic schoolbag learning environment.
Prophylactic Effect of Dragon-Pearl Tea on HCl/Ethanol Induced Gastric Injury in ICR Mice
Authors: Wang Rui , Zhao Xin
Published: October 2014

Dragon-pearl tea is a traditional Chinese drink consumed in Southwest of China. In the present study, the preventive effect of Dragon-pearl tea on gastric injury was determined in ICR mice. High concentrations of Dragon-pearl tea were observed to reduce the levels of the serum proinflammatory cytokines, IL-6 and TNF-α, compared with low concentrations of Dragon-pearl tea. Gastric secretion volumes were highest in control mice and reduced in 500, 1,000 and 1,500 mg/kg Dragon-pearl tea treated mice. The pH levels of gastric juice samples obtained from each group revealed the opposite correlation. Gastric injury levels in mice treated with Dragon-pearl tea were identified to be significantly reduced, demonstrating its anti-inflammatory properties. Administration of 1,500 mg Dragon-pearl tea (79.4%) by gavage was demonstrated to induce the highest inhibitory effect on gastric injury. Results of the current study indicate that Dragon-pearl tea exhibits marked preventive effects on gastric injury.
Evaluating Goodness-of-Fit in Comparison of Different Expressions for Length-Weight Relationship in Fishery Resources
Authors: Xu Hai Long , Chen Yong , Gu De Xian , Qiao Xiu Ting
Published: October 2014

To find out the optimal length-weight relationship expression of fishery species, eight different expressions were used to fit the length-weight relationships in 18 fishery species (nine fish species, two shrimp species, three cephalopoda species, three crab species and one mantis shrimp species), including Linear Regression Function, Body Mass Index, Power Regression Function and Polynomial Function, and the goodness-of-fit of each expressions were compared by adjusted R-square, Residual Standard Deviation (RSD), and Fitting Optimization Index of Curve Regression which is proposed by Zhang. The results turned out that the polynomial equation W = a + b * L3 + c * L2 + d * L showed the best goodness-of-fit, while the linear equation W = a + b * L and BMI equation W = a * L2 showed the worst goodness-of-fit. Combined with prediction curve of regression function, there may be over-fitting in the model of polynomial function. In this research, the expressions W = a + b * Lc was proved to show the best goodness-of-fit in length-weight relationship at given simples or populations, and the constant term ‘a’ as an error may not be zero for samples.
Studies on the Bacteriostasis of Nano-Silver on the Pathogenic Fungus Botrytis cinerea from Illed Plants
Authors: Qiu Lu , Yang Hai Han , Lei Fang , Fan Shu Guo , Xie Mei Hua , Wang Zhen Ji
Published: October 2014

Obiective is studing the bacteriostasis of nanosilver on the pathogenic fungus Botryticinerea from illed plants. Five strains of Botrytis cinerea were used as the experimental materials. 0.3 % carbendazim and 0.3 % chlorothalonil were used as comparing chemistry bacteriostatic agents. The inhibitionand effects of bacteriostatic agents on the growth of mycelia, spore’s germination, size of the inhibitory zone, electrical conductivity, morphology and structure of Botrytis cinerea were studied. Results is that the bacteriostatic effects of nanosilver is significantly better than blank comparing experiment, and there are differentiation in strains. The bacteriostasis effece of carbendazim is better than chlorothalonil. The chlorothalonil is better than nanosilver. Conclusion is that There is better bacteriostasis against Botrytis cinerea for nanosilver. The The principle of bacteriostasis is that nanosilver disrupts permeation of cell mombrance of Botrytis cinerea.
Diagnosis of Ovarian Fibroma by Ultrasonography
Authors: Pan Yu Ping
Published: October 2014

The ultrasonic characteristics of 35 patients with ovarian fibroma confirmed with pathology were retrospectively analyzed. Ultrasonic characteristics of all the 35 patients was solid lesion beside uterus, there were 14 uniform low echo in it, nonuniform low echo 8, 2 nonuniform echo in it, 11 had been detected,8 accompanying obviously attenuation behind it.The ultrasonogram of ovarian fibroma has certain characteristics, but final diagnosis depends on pathology.
Advanced Sequence-Based Localization Algorithm in Wireless Sensor Networks
Authors: Zhou Fu Bin , Xue Shao Li
Published: October 2014

As an important application of Internet of Things , Wireless Sensor Networks utilized in surveillance and other case.Localization of nodes in wireless sensor networks is the prerequisite and base of target tracking in some surveillance applications, so localization error of sensor nodes is a key. However, due to limited energy, unreliable link and limited communication ranges of sensor nodes, high accurate positioning is difficult to achieve, which made it hot and full of challenging for wireless sensor nodes to localize without any auxiliary facilities. Range-based localization algorithm , could achieve good accuracy but require measuring devices, thus it is not appropriate for large-scale wireless sensor networks.So range-free localization algorithms are more popular.This paper analyses the algorithms in range-free localization,and proposed Advanced Sequence-Based Localization algorithm to improve the performance of positioning algorithm in wireless sensor network.
Grain Structure Development of C2Cl6-Refined Magnesium Alloy AM60
Authors: Zou Yan Da , Hu Henry , Zhang Xue Zhi
Published: October 2014

The demand for weight reduction in automotive industry has generated great interest in research and development of magnesium applications, especially for powertrain components. Recently, the squeeze casting process is increasingly used on magnesium alloys mainly because of their great ability of eliminating the porosity in the castings. In this study, the effect of hexachloroethane (C2Cl6) as a grain refiner added into the squeeze casting AM60 magnesium alloys was investigated. The results of thermal analysis and microstructural analysis indicate the occurrence of heterogeneous nucleation of primary magnesium during solidification. The microstructural analysis suggests that the nucleation behavior of C2Cl6-treated AM60 alloy may be attributed to the increase in nuclei and nucleation rate during the solidification of the magnesium alloy.
Design and Implementation of the Power Watch Circuit of Groundwater Monitoring System
Authors: Zhang Jian Wei , Yang Zhuo Jing , Zhang Lei , Yuan Ai Jun
Published: October 2014

According to the characteristics of groundwater monitoring system,such as the field work unattended, replace the battery problem,the sampling time is short and standby time is long,the method is used to extend the power of life that using the watchcircuit control system under different power state automatic switching.Considering the characteristics of the system that parameter configuration commands are complex,field sampling is diverse and the communication time is not stable,thepaper puts forward the measuresthatmulti trigger source of hardware and status word of software collaborative work together to realize the system logic control.The overall power consumption of groundwater monitoring system which introduceswatch circuit is greatly reduced. Experimental results verify the feasibility of the watch circuit and show that the watch mode will become the development direction of field monitoring industry.
Measuring the Elastic Modulus and Poisson's Ratio of Corncob by Electrical Method
Authors: Li Xin Ping , Ma Yi Dong , Du Zhe , Gao Chun Yan , Ma Fu Li
Published: October 2014

The Elastic Modulus and Poisson's ratio of corncob were Measured by electrical method.The sensor was electric-resistance strain gauge.When the corncob was applied by force,the strain of corncob transformed into resistance changing of the sensor.Then,measure the resistance by SINOCERA YE253 programmable static strain gauge and transmit the resistance into the strain.It was found that the Elastic Modulus of corncob under the moisture content of 10.5% is 1.208×109 Pa and the Poisson's ratio is 0.33.
Research on Low-Voltage Arc Fault Detection Based on BP Neural Network
Authors: Zhang Ren Cheng , Yang Kai , Wu Qi Yong , Yang Jian Hong
Published: October 2014

In electrical fires, arc fault is one of the important reasons. In virtue of cross talk, randomness and weakness of arc faults in low-voltage circuits, very few of techniques have been well used to protect loads from all arc faults. Thus, a novel detection method based on BP neural network was developed in this paper. When arc faults occur in circuits, current integrations of cycles were variable and erratic. However, current integrations of cycles would also vary while the working conditions of circuits change. To better discriminate the current integrations, four characteristics were extracted to represent their differences through chain code. Based on these characteristics, BP neural network was used to distinguish arc faults from normal operations. The validity of the developed method was verified via an experimental platform set up. The results show that arc faults are well detected based on the developed method.
Research on Measurement for Branching Fraction of ψ(2S) → ωπ0
Authors: Liu Hui Hui , Li Yong , Li Li Ben
Published: October 2014

The method to measure the branching fraction of decayed from in experiment has been studied. Based on the data sample collected on the BEPCII and the optimized criteria for event selection, the result can be obtained.
Sewage Detection System Design Based on Large-Scale Embedded Microcontroller
Authors: Xia Xiao Ling
Published: October 2014

A sewage detection system based on large-scale embedded microcontroller was designed. With the increasing national environmental control requirements, the existing detection methods have been unable to meet the emissions compliance requirements. It is necessary to adopt new detection technologies for faster, more stable and reliable sewage discharge test results. This paper uses an embedded microcontroller technology for chemical plant wastewater discharge testing, which can effectively control the quality of effluent discharge, meet environmental requirements, and achieve stable production, energy saving purposes. Practice has proved that, sewage detection system based on large-scale embedded microcontroller has a strong monitoring capabilities.
Volleyball Movement Trajectory Analysis Based on Three-Dimensional Visual Tracking
Authors: Li Yue Jun
Published: October 2014

in volleyball movement process, there is greater uncertainty in velocity and position of movement. Using traditional algorithms for volleyball movement trajectory analysis, it cannot get changes situation of volleyball movement trajectory, resulting in that there is a big deviation in volleyball movement trajectory analysis, and the accuracy of analysis is decreased. To this end, this paper proposes a volleyball movement trajectory analysis method based on scale dynamic transform analysis algorithm. According to the related theory of attenuation memory, the key frame image in the process of volleyball movement is extracted, thus providing a basis for volleyball movement trajectory analysis. Utilizing scale dynamic transform method, the background of volleyball key frame image is separated, to obtain the volleyball movement trajectory in current frame image, so as to achieve volleyball movement trajectory analysis. Experimental results show that using the proposed algorithm for volleyball movement trajectory analysis can effectively increase the accuracy of volleyball movement trajectory analysis, and achieve satisfactory results.
Analysis on the Setting of Modeling and Detecting Parameters of GEO Orbit Satellite Camera
Authors: Dong Yu Cui
Published: October 2014

Analysis on the detecting parameters of GEO orbit satellite camera is of great significance in the design process of satellite camera, to some extent; it determines the parameters required for achieving the expected performance. This article introduced the parameter setting methods of GEO orbit satellite under different working conditions, which are commonly used in engineering; and it analyzed the influence of the setting of GEO orbit satellite camera’s detecting parameter on the performance of the final image under different solar illumination angles, times and seasons. And it also performed simulated analysis on the imaging process under the aerosol model using MODTRAN and MATLAB in different seasons at daytime without clouds in rural area of middle latitude, so as to calculate and simulate the signal-to-noise ratio change of the energy received by the camera in different regions, seasons and time frames, which has a guiding significance on the camera design process.
Feature Extraction of Vibration Signal Based on an Improved Local Wave Analysis
Authors: Wang Feng Li , Xing Hui , Duan Shu Lin
Published: October 2014

In order to reduce the random noise influence on local wave decomposition (LWD), the original data is adaptively denoised by lifting wavelet transform to strain mode aliasing in LWD, avoid the pseudo mode functions in LWD and improve the quality of LWD. Local wave marginal spectrum is employed to analyze vibration signal for extracting the characteristics information. Intrinsic mode functions obtained by LWD, the instantaneous frequency and amplitude can be calculated by the Hilbert transform. The improved local wave analysis can offer a measure of the energy distribution of vibration signal from its instantaneous frequency. Analysis and experimental result demonstrate the validity of the proposed method.
Analysis of Tee Pipe Hydroforming Process Parameters
Authors: Wang Shi Gang , Wang Dan , Gao Fu Sheng
Published: October 2014

By using the finite element software Dynaform, the process of tee pipe hydroforming is obtained with the analysis of forming force, the extrusion speed, die radius, friction conditions and the initial length of tube rounds, which are key process parameters on the influence of tee pipe. Obtained by analyzing the tee pipe hydroforming law, to the actual production of tee pipe hydroforming process design provides the reference data and related guidance.
Application of MasterCAM in the Processing of Avoiding Valve Pits of Piston
Authors: Zhao Chang Long
Published: October 2014

This paper selects two kinds of different avoiding valve pits of piston as the processing object, establish manufacturing process and complete the simulation of NC machining to generate NC code for machining avoiding valve pits in the Mastercam software, try to machine avoiding valve pits with two kinds of surface programming method in the Mastercam software, discuss and analysis the effect in programming and NC machining of avoiding valve pits in two kinds of different surface finishing method , to choose an appropriate kind of processing method for avoiding valve pits of piston.
Correct Use and Maintenance of Nc Machine Tools
Authors: Sun Quan Fang , Zhang Jun Ling
Published: October 2014

A country's level of Nc machine tool and ownership, is to measure the level of manufacturing and industrial modernization level of important indicators, is also an important index to measure national comprehensive competitiveness. Therefore, how to better use and maintenance of Nc machine tool is an important issue. This paper introduced how to reasonable use of Nc machine tools, as well as the use of the numerical control system and inspection.
Crack Damage and Facture Analysis of Airship Envelope Material
Authors: Xiao Hou Di , Liu Long Bin , Lv Ming Yun
Published: October 2014

Original defects in the envelope material easily torn damage under overpressure, when the stratospheric airship in use. This paper based on linear elastic theory studied the tear strength of envelope material containing initial center crack and proposed theoretical model for this problem. Choose Vectran fiber as a reinforcing layer of stratospheric airship envelope material, Combined with digital speckle method measuring tear strength of envelope materials containing different initial center crack length. Comparative analysis found that the theoretical model applicable to estimate the tear strength of envelope material, that center initial crack width ratio is less than 50%.It estimation error within 5% .It satisfies the requirement of engineering application accuracy.
Design of Parts Processing and Control System Based on PLC
Authors: Kuang Xing Hong , Yao Zhe Yi , Wang Shi Ming
Published: October 2014

This article focuses on the design of parts processing and control system based on Siemens S7-200 PLC. The purpose of this study is to learn and become familiar with the Siemens S7-200PLC hardware parameters and the use of programming software STEP 7 Micro/WIN SP9, and design a rational and effective parts processing and control system. This paper firstly describes the development history and development status of the PLC, so that readers can understand the PLC briefly. Secondly, the article shows some important technical parameters such as Siemens S7-200PLC CPU model, hardware configuration and so on. It is to clarify the basic component of parts processing and control system and its working principle, and the role of Siemens PLC in the system. Finally, according to specific design requirements, programming software STEP 7 Micro/WIN SP9 is used to program for the system so that the system can operate effectively and reasonably. The study successfully achieved the desired goals, through reasonable programming made PLC take the full control of parts processing in this system..
Design, Modeling and Simulation for Obstacle Crossing Robot Based on In-Wheel Motor
Authors: Meng Guan Jun , Zhang Zu Tao , Xu Hong
Published: October 2014

This paper presents a novel Omni-directional obstacle crossing robot with a combination of passive and active obstacle crossing mode which uses binocular cameras to detect obstacles. The Omni-directional movements can enhance the ability of the robot working in small space and improve the efficiency of steering. The combination of passive and active mode can not only guarantee the adaptability to complex terrain but also enhance the obstacle-crossing ability of the robot. This system was tested in simulation environment, and the last performance evaluation demonstrates the validity of the proposed obstacle crossing robot.
Electrical Erosion Failure Analysis of Speed Increasing Gearbox Gear
Authors: Bian Xin Xiao , Lu Jin Xing
Published: October 2014

This article mainly discusses the mechanism of electrical erosion and the macro and micro appearance of electrical erosion failure tooth surface. By observing the similarity of the two groups of tooth surface morphology, we can determine the possibility of gear electrical erosion failure. Through the calculation of gear contact strength and anti scuffing ability, we can rule out the possibility of tooth scuffing and pitting. So we can identify that the failure form of gear is electrical erosion .Finally, according to the calculation of the content, we get some conclusions.
Research on Depth Evaluation of Surface Crack in Laser Cladding Coating with Metal Magnetic Memory Technology
Authors: Liu Bin , Shao Zhu Jing , Dong Shi Yun
Published: October 2014

Depth of evaluation method of surface crack in laser cladding coating with metal magnetic memory was introduced in this paper. Laser cladding coating specimen were degaussed, placement direction of specimen and detection direction unchanged, detection speed and lift off value of probe were the constant. Results show that gradient value ofHp(y) signal corresponding to surface crack increases as tensile load increases under the same depth of surface crack, gradient value ofHp(y) signal corresponding to surface crack increases as depth of surface crack increases under the same tensile load. Orientation of internal magnetic domain changes as tensile load changes and magnetic leakage field caused by surface crack are seen as two main reasons for above results. Using fitting method with quadratic polynomial, depth of surface crack in laser cladding coating can be evaluated nondestructively in this paper.
Research of Halbach Array’s Influence on Permanent Magnet Synchronous Motor’s Performance
Authors: Zhang Hao Ming , Li Hong , Peh Lian Soon
Published: October 2014

The present motors are required to high speed, high efficiency, high power density but low pulsating torque. Traditonal rare-earth permanent magnet motor shows its defect; Halbach Array is a new type of permanent magnet structure: magnet field presents unilateral with the sinusoidal distribution. The structure makes the magnetic density of motor’s air gap larger relatively while the magnetic density of rotor’s yoke smaller. And it can help to reduce the motor’s pulsating torque and its size, as well as to raise the power density of motor. The result of finite element analysis based on ANSYS shows that the above structure is able to decrease the mass of motor, to widen the width of air gap and obviously to improve the multi properties of motors.
Study of Pilot Injection for the Improvement of Combustion and Emissions Characteristics in a Heavy-Duty Diesel Engine
Authors: Chen Liang , Zeng Hong , Cheng Xiao Bei
Published: October 2014

A 6-cylinder, turbocharged, common rail heavy-duty diesel engine was used in this study. The effect of pilot injection strategies on diesel fuel combustion process, heat release rate, emission and economy of diesel engine is studied. The pilot injection strategies include pilot injection timing and pilot injection mass to achieve the homogeneous compression ignition and lower temperature combustion of diesel engine. The two-color method was applied to take the flame images in the engine cylinder and obtain soot concentration distribution. The results demonstrate that with the advance of pilot injection timing, the peak in-cylinder pressure becomes lower, the ignition delay of the main combustion is shortened, the NOXand soot emissions are reduced, but the HC and CO emissions are increased. With the increase of pilot injection fuel mass, the heat release rate of the pilot injection combustion and the maximum rate of pressure rise increase, NOXand HC emissions are higher, and PM and CO emissions are reduced. The pilot combustion flame is non-luminous.
The Application of Cascade Control Based on DMC in Stripping Section Temperature Control System
Authors: Xiao Jian Ping , Song Tong
Published: October 2014

Predictive control is one of the robust control algorithms that suitable for computerized implementation, and requests lower accuracy of the model. It has been widely used in process control recently. Considering the features of distillation column stripping section, such as complex internal mechanism, time-varying parameters and large time delay, the DMC-PID cascade control strategy is adopted. The simulation results show that this strategy combined the advantages of predictive control and cascade control, can make distillation column stripping section have good dynamic and static characteristic in the presence of external disturbance and time delay. The performances are better than DMC and conventional PID control.
The Integrated Display System in Aircraft Cockpit Based on FPGA
Authors: Gao Jing , Jia Yin Liang , Li Bing Yang
Published: October 2014

The main research object is the graphics generation and display system based on FPGA, the system is mainly used for the integrated display of aircraft cockpit. The display system has the characteristics of large amount of data, real-time processing in the graphics generation. According to the characters, the paper uses programmable logic device due to FPGA has the advantages of high speed, real time. In order to further improve the efficiency of the system, the paper also designs the ping-pong operation of double SSRAM(Synchronous Static Random Access Memory) at the same time. Through the experiment, the system can run well and achieve the desired objectives.
The Simulation Research of Dynamic Flow Based on the Bypass Method
Authors: Zhang Jun , Wang Xue Xue , Tang Hong Mei , Guo Bang Zeng , Li Xian Hua
Published: October 2014

The flow rate in high pressure hydraulic system is greatly affected when flow meter is inserted in the system. A method was proposed that was by measuring the lateral pipe flow instead of directly measuring system of main flow. According to this method, simulation model was set up based on software. And the influence of the flow distribution relationship between main and side oil-way by the change of relief valve. Theoretical studies show that the measurement method is feasible.
The Stability Analysis and Controllers Design with Packet Dropouts for Discrete-Time NCSs Based on Augmented Switched System
Authors: Wen Dan Li , Deng Huai Yong
Published: October 2014

This paper was concerned with stability analysis and controlers design with packet dropouts for discrete-time NCSs. Stability controllers via state feedback is constructed for the switched system by using an LMI-based method.
Seismic Analysis of Hoist Using ANSYS Workbench
Authors: Liu Liang , Wang Zhan Jun
Published: October 2014

In order to verify that the +20m platform hoist for Qinshan Nuclear Power Plant can withstand safe shutdown earthquake (SSE) without any damage, that is during or after SSE, completeness of structure and operation can be ensured, finite element analysis software, ANSYS Workbench is applied to analysis on model building and seismic analysis for the platform hoist (including hoisting mechanism, base plate,drum).
Exergy Analysis of Coal-Fired Power Plants in Two Cooling Condition
Authors: Wu Dian Fa , Wang Ning Ling , Fu Peng , Huang Sheng Wei
Published: October 2014

The distribution of exergy destruction is different in power plant systems with water cooled condenser and air cooled condenser. A detailed comparison based on a conventional Rankine cycle with two different cooling configurations is carried out in this paper in an exergy perspective. The inefficiency of the overall systems is analyzed in the same amount of heat transfer capacity condition, it shows that the distribution of exergy destruction among components is similar in both conditions. And this study of energy consumption is benefit for realization of auto-efficient-working power plants in future.
Multi-Factors Analysis of Condenser Vacuum under Overall Working Conditions
Authors: Wang Ning Ling , Chu Feng Ming , Fu Peng , Yang Zhi Ping , Yang Yong Ping
Published: October 2014

It is of great significance to determine an optimal condenser vacuum for energy-saving diagnosis, for the vacuum means a lot to the safe and economic operation of thermal power units. The key parameters were calculated by the practical data, such as the cleanliness factor. The condenser heat transfer coefficient is affected by both the dirty of condenser water side and other factors on the basis of the method of adjusting the circulating-water flow unilaterally to get the optimal vacuum of condenser in this paper. The impacts of the exhausting steam resistance, the oxygen content of condensate caused by the change of the circulating-water flow were considered in this paper. The practical operation data was analysed with the results from HEI. The simulations were examined in the comparison of heat transfer coefficient. The impacts of unit energy consumption characteristics under overall working conditions caused by condenser vacuum were obtained in the approach based on the theory of energy specific fuel consumption (ESFC). The variation of auxiliary specific consumption as the temperature of circulating-water changing was obtained. The results indicated that the optimal condenser vacuum determined by the method aiming at maximum output power and many factors under overall working conditions accounted for played an important role in the energy saving diagnosis of thermal power units.
A Research and Analysis on Equivalent Circuit Model of Lead-Acid Batteries of Armored Vehicles
Authors: Li Kuang Cheng , Liu Yan , Liu Zheng , Yang Huai Bin
Published: October 2014

To analyze the operation of the lead-acid battery of armored vehicles and facilitate the measurement of the state parameters, we need to see the lead-acid battery as a plurality of ideal components and establish the corresponding equivalent circuit model and characterize it. This paper describes several equivalent circuit models of commonly used lead-acid batteries, on this basis, we give the equivalent circuit model of lead-acid batteries of armored vehicles, and to analyze the variables of equivalent circuits.