bluuebunny/crossref_metadata_2025 huggingface dataset:
An Improved Simulated Annealing Algorithm for Travelling Salesman Problem
Authors: Wang Y. , Tian D. , Li Y.H.
Published: September 2013

Traveling salesman problem (TSP) is one well-known NP-Complete problem. The basic simulated annealing algorithm is improved with the four vertices and three lines inequality to search the optimal Hamiltonian circuit (OHC) or approximate OHC. The four vertices and three lines inequality is taken as the heuristic information to convert the local Hamiltonian paths in the Hamiltonian circuit (HC) into the local optimal Hamiltonian paths and the HC become shorter. The HCs are generated with the basic simulated algorithm first. Then the local Hamiltonian paths are changed into the local optimal Hamiltonian paths with the four vertices and three lines inequality. The algorithm of the improved simulated annealing is designed and tested with twenty TSP instances. The experimental results show that the better approximate OHCs are found than those searched with the basic simulated annealing algorithm under the same preconditions.
Adaptive Resource Scheduling Algorithm with QoS Guarantee in WiMAX Mesh Mode
Authors: Xiao L.Y. , Wang R. , Wang Z. , Wang H.N.
Published: September 2013

WiMAX is a new wireless metropolitan area networks technology based on IEEE 802.16 standard. WiMAX can provide high-speed connection for Internet. IEEE 802.16 standard is an open broadband wireless access technology, which supports high data rate and multimedia communications. Scheduling plays an important role in providing quality of service (QoS) support to multimedia communications. IEEE 802.16e defined two topology architectures: point-to-multipoint and mesh. In this paper, an adaptive resource scheduling algorithm with QoS guarantees is proposed for WiMAX mesh mode. The scheduling order is determined according to the priority, QoS satisfaction and topology information of service flows in this algorithm. The system throughput, rtPS packet loss rate and nrtPS throughput of different algorithms are compared by simulation. Simulation results show that the proposed adaptive resource scheduling algorithm can meet various QoS requirements and increase the system throughput.
The Application of 3S Technology to the Tsukuba Bailin Landscape Project
Authors: Xu Hao
Published: September 2013

The purpose of this paper is to investigate the method and process of using 3S technology on a landscape engineering project. Through a case study on the Bailin landscape construction project in Tsukuba, Japan, this paper argues that strengthening the drafting capabilities of 3S technology (e.g., comprehensive database management, mapping, landscape simulation, and data updating) will create the type of integrated platform for engineering design and management needed to increase the efficiency of landscape engineering projects.
Simulation Investigation of Bis(pentaphospholyl) Metallocenes of Fe, Ru, and Os
Authors: Gong Liang Fa , Cao Qi Qun , Wen Jia , Rong Hua , Ge Ming Lan
Published: September 2013

The structures, stabilities, and bonding features of neutral M(η5-P5)2 (M = Fe, Ru, and Os) and cationic M(η5-P5)+ have been investigated using density functional theory (DFT) (hybrid B3LYP and pure BP86 methods). The eclipsed (D5h) structure has been predicted to be the global minimum for this triad bis(pentaphospholyl) metallocenes, and the staggered (D5d) structure to be the rotational transition state. The distances between the metal and cyclo-P5 center in bis(pentaphospholyl) metallocenes are longer than in the corresponding M(η5-P5)+ by 0.28-0.38 Å. The M(η5-P5)+ complexes may be tighter binding with the shorter metal-ring distances, the possible reason is that there being stronger metal-ring π interactions in M(η5-P5)+ than in M(η5-P5)2, even though latter satisfies the 18-electron rule. The electron densities are found to accumulate at the metal centers, this novel situation may have an impact on the mechanism of some potential catalysis reactions.
The Application of Functional Collagen Biomaterials and Tissue Engineering in Tissue Repair for Exercise-Induced Injury
Authors: Dang Xue , Li Xiao Jing
Published: September 2013

Function of biological material refers to the activity of biological materials affect biochemical or physiological process, which composed by the materials and the active components is carried by the materials. Collagen material is widely used as a biomaterial, and growth factor could promote cell proliferation, migration and differentiation, so often used activation collagen material. By means of gene engineering technology in growth factor on the collagen binding domain (CBD), growth factor binds to collagen materials prepare the specific growth factor, directional anchored to the formation of collagen biomaterials collagen materials.
Experimental Study on Biogas Production by Mesophilic Fermentation for Rabbit Dung
Authors: Li Ying Juan , Liu Li Chun , Yang Bin , Zhang Wu Di , Yin Fang , Xu Ling , Zhao Xing Ling , Liu Jing , Chen Yu Bao , Liu Shi Qing
Published: September 2013

In order to obtain the biogas fermentation potential of rabbit dung, the anaerobic batch fermentation experiments were performed at 30°C, the feed concentration of 6.09% and an initial pH of 7.0. The experiment was design of the control group (120mL seeding materials) and the experimental group (120mL inoculum+21.51g rabbit dung) to explore the potential of the anaerobic digestion of rabbit dung. The results show that biogas production of rabbit dung during total fermentation period of 36 days is 3084mL, TS biogas yield is 432mL/g, and gas yield is 508mL/g. The results indicated that rabbit dung can be used for biogas fermentation and the fermentation was good.
Slow Strain Rate Tension Stress Corrosion Cracking Test for L80 and C90 Steel
Authors: Qiu Zhi Chao , Zhang Na , Liu Xiang
Published: September 2013

Slow strain rate tension stress corrosion cracking test was applied to test the SSC-resistant ability of L80 and C90 steel. The experimental result showed that: L80 steel occurred plastic fracture and had good resistance to SSC; C90 steel occurred plastic-brittle fracture and the ability of SSC-resistance was worse than that of L80.
Effect of Arc Current Ultrasonic-Frequency Pulsation on Underwater Wet Arc Welding Quality
Authors: Zhu Jie , Guo Jia Cheng , Wang Wei , Wang Jia You
Published: September 2013

A novel process of ultrasonic-assisted underwater wet arc welding was proposed to improve the joint properties, a number of ultrasonic-assisted underwater welding experiments were then carried out, and the effects of pulse frequency on weld formation, joint hardness and microstructure were investigated. Experimental results show that the ultrasonic frequency pulsation of arc can improve weld penetration while reducing effectively the hardness of joint HAZ in the arc axial direction and refining the grain of microstructure, and the effects of which are related closely to the pulse frequency.
Experimental Study on Preparing Ecological Building Mortar by Using Solid Waste
Authors: Yan Chao Yong , Li Zhi Hua , Deng Xiao Min
Published: September 2013

This paper presents a kind of ecological building mortar with a compressive strength of M5.0, M7.5 and M10 , which includes waste residue as cementitious materials, and waste brick powder, waste mortar powder reclaimed sand instead of natural sand as aggregate. The test results shows that (1) mortar water consumption increase when recycled sand volume increases, but its water-retaining capacity goes up;(2) when different types of recycled sand are used instead of natural sand for middle and low strength mortar, there is no significant adverse effect on its strength, and the 28d compressive strength can all meet the designed strength requirements; (3) Little difference exists among the influence of different recycled sand on properties of mortar.
Study on Wear Ratio Analysis of Materials by Computer Image Technology
Authors: Li Li , Li Tao , Liu Jin Jun , Tian Zheng Yu , Zhang Guo Zheng , Fu Zhen Yu
Published: September 2013

Wear particles in lubricating grease used in ball grooves of a heavy load tracked vehicle’s master clutch’s release mechanism were observed and its digital photos were taken by a ferroscope. Those images were analyzed quantitatively via computer image technology by analyzing the configuration, size, color, and area percentage of wear particles. Wear ratio of abrasion, adhesion, contact fatigue and corrosion wear are quantificationally analyzed.
Stamp Modeling, Analysis and Design of Defected Microstrip Structure for Lowpass Filters Based on Properties of Metamaterials
Authors: Cao Hai Lin , Luo Jin Tao , Luo Qing , Li Hao , Guan Wei
Published: September 2013

Defected microstrip structure (DMS) is one kind of metamaterials, which has many characteristics that bandgap and slow wave characteristic and so on. Three types of defected microstrip structure (DMS) units which are cross-shaped, round-head-shaped and square-head-shaped DMS are proposed and investigated. Further, three DMS units are used in the design of lowpass filters (LPFs) and the obtained performances are examined. Based on three DMS units, three lowpass filters using sixteen cascaded proposed DMS units are designed and fabricated. The designed LPFs exhibit sharp cutoff frequency response, low insertion loss, and excellent stopband performance.
Electrochemical Investigation of Cyproconazole as Corrosion Inhibitor for Copper in Synthetic Seawater
Authors: Liu Ji , Zheng Li , Gan Hai Bo , Liu Huan , Tao Zhi Hua , He Wei
Published: September 2013

This paper presents the investigation of cyproconazole,namely2-(4-chlorophenyl)-3-cyclopropyl-1-(1H-1,2,4-triazol-1-yl) butan-2-ol,ascorrosion inhibitor for copper in synthetic seawater (3.5% NaCl solution).The inhibition action of cyproconazole on the corrosion of copper was investigated by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization.The selective desorption of Cyproconazole from copper surface was also studied by the differential polarization curves.EIS indicates that the inhibition formed an adsorption film on copper surface.The inhibition efficiency increases with increasing concentration.Polarization curves show that Cyproconazole acts as mixed-up inhibitor.
Experimental Study of Mix Proportion on Masonry Mortar’s Common Strength Grade in Material Engineering and its Application
Authors: Huang Hong Liang , Zhang Hui Fang , Li Yan Fang , Ma Guo Qing , Li Min Feng
Published: September 2013

It based the common strength grade of masonry mortar in construction works on two mixing materials that include composite paste and fly ash paste and an admixture. It spent nearly a year's time on the trial distribution, mixing, forming, form removal, maintenance, measuring strength and adjusting the mix ratio. It’s aimed for seeking the optimum mix proportion of masonry mortar through the comparative analysis of strength of Various proportions of masonry mortar, Promotion and application to be in material engineering.
Properties Study of a New Perfluorocyclopentenes Bearing Fluorene
Authors: Ding Hai Chang , Zheng Chun Hong , Liu Gang
Published: September 2013

A new unsymmetrical photochromic diarylethene 1-(2-methyl-benzothiophenyl) - 2-((5-(9, 9-dibutyl-fluorenyl)-2-methylthiophen-3-yl)) perfluoroncyclopentene (1o), was synthesized and its optoelectronic properties, such as photochromism in solution as well as in poly-methylmethacrylate (PMMA) amorphous films and fluorescence were investigated. The photochromic reaction kinetics indicated that the cyclization process of 1o belongs to the zeroth order reaction and the cycloreversion process belongs to the first order reaction. When the concentration at 5 × 10-5 mol/L the fluorescence peak have the maximum.
A Novel Unsymmetrical Diarylethene Material Bearing Double Thiophene Ring
Authors: Jing Shu Hong , Fan Cong Bin , Pu Shou Zhi
Published: September 2013

A new photochromic diarylethene compound, 1-[2-methyl-5-(3-thienyl)-3-thieny-2-[2-methyl-5-(3-benzaldehyde)-3-thieny perfluorocyclopentene (1a) was synthesized. Its properties, including photochromism and fluorescence were investigated in detail both in solution and PMMA amorphous film. It underwent reversible cyclization and cycloreversion reactions upon alternating irradiation with UV and visible light in hexane. The compound showed good phtochromism both in solution and in solid states. Diarylethene 1a changed the color from colorless to navy upon irradiation with 297 nm UV light, in which absorption maxima were observed at 577 nm in hexane and at 592 nm in PMMA film, respectively. Using diarylethene 1b/PMMA film as recording medium, optical recording was performed successfully.
Photochemistry Properties of a Novel Photochromic Diarylethene Derivative
Authors: Li Xiao Ting , Li Hui , Pu Shou Zhi
Published: September 2013

A new unsymmetrical photochromic diarylethene, 1-[2, 4-dimethyl-5-thiazoly-2-[2-methyl-5-(3-methylphenyl)-3-thienyperfluorocyclopentene (1o) were synthesized, and its properties, such as photochromism in solution as well as in poly-methylmethacrylate (PMMA) amorphous films, and fluorescence properties were investigated in detail. The results showed the compound exhibited good photochromism in hexane solution and in PMMA amorphous film, the maxima absorption of its closed-ring isomer 1c are 492 nm and 498 nm respectively. The open-ring isomer of the diarylethene 1 exhibited relatively strong fluorescence at 465 nm in hexane solution (5 × 10-5 mol/L) when excited at 289 nm. The fluorescence intensity decreased along with the photochromism upon irradiation with 297 nm light. The fluorescence intensity of diarylethene 1o also depended on the concentration. When the concentration of diarylethene 1o in hexane increase from 1 × 10-6 mol/L to 2 × 10-4 mol/L, the fluorescence intensity of the open-ring isomer become strong first, then become weak.
Photochromism and Optical Recording of a Novel Diarylethene Bearing Phenanthrene Unit
Authors: Li Xue , Fan Cong Bin , Liu Gang
Published: September 2013

Photochromic molecules are part of a large class of materials in which light stimulus not only induces a color variation but also affects other physicochemical properties. In the paper, an asymmetrical photochromic diarylethene, 1-(2,4-dimethyl-3-thiazole)-2-[2-methyl-5-(10-phenanthrenyl)-3-thienyPerfluorocyclopentene was synthesized and its photochromic and fluorescent properties were systematically investigated. The compound exhibited remarkable photochromic, changing from colorless to OrangeRed after irradiation with UV light both in solution and in PMMA film. In addition, its fluorescence property was also discussed. When irradiation with UV light, the fluorescence intensity declined remarkably. The results showed that the diarylethene exhibited a relatively strong fluorescence switch along with the photochromism from open-ring isomer to closed-ring isomer. Using this diarylethene 1a as optical storage was performed successfully.
Synthesis and Photochromism of a Novel Diarylethene Bearing Xylosyltriazolyl Groups
Authors: Zhang Qing , Tong Zhi Peng , Liu Gang
Published: September 2013

A new unsymmetrical photochromic diarylethene, 1-{2-methyl-5-[5-(2,3,5-trihydroxyl-β-D-xylosyl)-3-(1,2,3-triazolyl)] methylene-3-thienyl}-2-[2-methyl-5-(4-methoxylphenyl) methyl-3-thienyl] perfluorocyclopentene (1a), was synthesized, and its photochromic properties were investigated in detail. The compound exhibited good photochromism both in acetonitrile solution and in PMMA film with alternating irradiation by UV/vis light, and the maxima absorption of its closed-ring isomer 1b are 556 and 560 nm, respectively. There almost no fluorescence switches of 1a in acetonitrile solution and PMMA amorphous film. The diarylethene 1a has promising application for photo-switching, which can use for data storage.
The Control of Bearing Pre-Tightening Force on the Guide of High Speed Punch Press
Authors: Xiao Mao Hua , Sheng Juan , Xiao Zheng , Wang Tong Yue
Published: September 2013

The bearing pre-tightening force on the guide of high speed punch press has immediately influenced the running accuracy of the slide, as well as the precision of the high speed punch press. So, the control of bearing pre-tightening force on the guide of high speed punch press was a very important issue in the study of high-speed presses. Through the research and analysis of the guidance system structure, the method of adjusting and controlling the guide rail bearing pre-tightening up force has been proposed in this article.
The Study of Biomass Briquetting Machine Die Hole's Effect on Stress State
Authors: Gu Zhi Xin , Xu Kai Hong
Published: September 2013

The key components of ringmatrixpress is a loop die, whose periphery clouds of die hole, which is easy to deformation to failure, need for frequent replacement of the mold. This improves the production costs of biomass briquetting technology. The study of stress state of die hole can provide a theoretical basis for the design of strength, long life die hole. By theoretical analysis of the stress of circumstances in the different locations of the die hole, we explore the stress distribution in the die hole and the influence on the strength of the die hole, determine the optimal parameters of biomass briquetting process.By analyzing the deformation produced by die hole under the effect of the pressure load, we seek the law of molding pressure on the die hole.
Dynamic Analysis of Belt Conveyor Based on ADAMS and PRO/E
Authors: Zhou Guang Lin , Han Rui Fei
Published: September 2013

This paper is about dynamic simulation of the belt conveyor based on ADAMS and PRO/E, and analyzes the influence of the transport distance of the conveyor start-up. As the transport distance of belt conveyor increases, the time of which start-up speed increases from rapidly to slowly prolongs, and the lateral vibration of the belt is more severe. It provides a basis for the selection of start-up time and idler spacing.
The Application of Image Recognition Based on BP Neural Networks in Automatic Steel Rolling
Authors: Jiang Wei
Published: September 2013

A BP neural networks is presented for billet character recognition. Firstly, by a series of image processing techniques, the character’feature in the billet character region of the video image gathered by frame grabber is abstracted. Secondly, the BP neural networks algorithm is employed for character recognition. Application results show that the image recognition based BP neural networks can performs well in billet character recognition, and the method presented is speedy, efficient and of high value in practice.
Analysis of Mechanophysical Properties of Fritillaria ussuriensis Maxim and Designing of Grade Sieve Machine
Authors: Song Jiang , Lu Song Zhuo , Liu Li Hua , Wang Ming , Liu Tian Xiang
Published: September 2013

Based on the field and lab measuerement in harvest time, Physical and mechanical properties of fritillaria ussuriensis maxim (FUM) are researched. Geometrical properties of FUM are analyzed using mathematical statistics method, and the variation sections of main index values of two kinds of FUM are obtained. Mechanical properties of FUM outsifting in screen penetrating process are tested by means of friction experiment, the friction coefficient and angle of repose of two kinds of FUM are obtained using mathematical statistics method. Grade sieve machine is designed based on the analysis of mechanophysical properties of FUM. The main parameters are: shape of sieve pore is rectangle, screen diameter is 20mm, sieve pore dimension of upper layer is 13×20mm2, middle layer is 9×18mm2, and under layer is 7×10mm2. By testing of friction coefficient and angle of repose and movement and dynamics analysis of grade sieve, outsifting velocity is 7<<9rad/s and acceleration is 4<a<13m/s2 in screening process.
User-Friendly Design of Modern Forest Fire Helmet
Authors: Li Bo , Yang Hong Ze , Wu Ya Nan , Li Bin
Published: September 2013

This article researches and discusses the current situation of the modern forest fire helmet. It focuses on the problems and difficulties in the modern forest fire helmet design and analyses them. With the concept of user-friendly design, this article advances the user-friendly design principles in modern forest fire helmet design.
Design of a Series of Cylindrical Helical Torsion Springs Based on Similar Design Theory
Authors: Li Xiao Ping
Published: September 2013

A series of cylindrical helical torsion springs has been designed with the help of the similar design theory and method. The values of maximum torque and stiffness of the series have been figure out.
Study about Formation Mechanism of Red Spark Discharge of Micro-Arc Oxidation
Authors: Pan Ming Qiang , Wang Yang Jun , Chen Tao , Liu Ji Zhu , Chen Li Guo , Di Shi Chun
Published: September 2013

Formation mechanism of the micro-arc oxidation spark discharge is always a research problem; so far there isnt a theoretical model for analyzing the spark discharge formation which is widely recognized. Based on analyzing the reaction phenomena and the coating feature in the different periods of the red spark discharge, the formation model of the red spark discharge was established. The spark discharge formation mechanism is shown that it causes the spark discharge formation that the electron bombards the gas layer wrapping the coating in the infancy of red spark discharge stage; at the later period the area of strong electric field generates the spark discharge where the coating of excessive polarization turns out easily.
Grinding Technology for Engineering Ceramics - A Review
Authors: Xue J.X. , An L.L. , Sun Q.P.
Published: September 2013

In the manufacture of ceramic components, it has been well documented that the grinding costs can be as high as 80% of the total cost. To reduce the grinding cost, massive research studies have been conducted and new types of high-performance machining techniques have been developed based on the fundamental understanding of the prevailing grinding mechanisms for engineering ceramics. The developments in grinding mechanisms and grinding processes are reviewed and summarized.
Microstructure and Properties of Laser Cladding Co-Based Alloy Layer
Authors: Zhao X.R. , Zuo Dun Wen , Cheng H. , Li Q.T. , Dai S. , Feng S.S.
Published: September 2013

The Co-base alloy laser cladding layer was coated on the 2738 mold steel surface by using the TJ-HL-5000 transverse-flow CO2 continuous laser. The morphology and hardness were investigated by metallography microscope, scanning electron microscopy (SEM), X-ray diffraction (XRD) and microhardness tester. The metallography microscope and SEM investigations show that from interface to surface along the cross section direction, the cladding layers consist of plane crystal layer, columnar crystal layer, dendrites layer and surface cellular crystal layer, respectively. XRD results indicate that the cladding layer is made of γ-Co, Cr23C6, MoC, FeCr and Co3Mo2Si phases. The micro-hardness of the laser cladding coating was about 900-1100HV1, 3 times or more of the steel substrate. And the mechanisms of microstructure formation and strengthening are investigated.
Study on Friction and Wear of Several Metal Materials under Oil Lubrication
Authors: Guo Zhan Bin , Gao Song Lin
Published: September 2013

The friction and wear properties of several common metal materials (45#, 25CrMn, and 40CrNiMo) friction pair under oil lubrication was investigated on M-200 Type wear tester, and studied the friction under the condition of differ sliding speed and pressure. The results show that: the 25CrMn/45# steel pair has better tribological and wear performance; the load is the main factor which influences the friction of the material at the low sliding speed; the main wear form is adhesive wear, but the wear mechanism is gradually became from adhesive wear to abrasive wear and flaking wear with the contact pressure and sliding speed increased.
A New Technology of Aircraft Structural Health Monitoring
Authors: Lu Xiao Hua , Zuo Hong Fu
Published: September 2013

A new technique of aircraft structural health monitoring so-called Comparative Vacuum Monitoring (CVM) is introduced in this paper. Compared with the traditional and some novel Non-Destructive Testing (NDT) techniques, it is capable of real-time crack initiation and growth detection reliably and accurately, and especially suitable to monitor the interior locations with hard accessibility. With the advantages of this technique, the aircraft manufacturers (such as Boeing, Airbus, Bombardier, Embraer, ect.) are much interested in applying it into aircraft structural health monitoring and have carried out verification tests on aircrafts or technology ready for the future usage. Through the use of CVM technique, it is possible to quickly, routinely and remotely monitor the integrity of a structure in service.
Preliminary Study on the Effect of Mass-Induced Damping on Machining Delicate Workpiece Geometry
Authors: Kamaruddin A. , Pan W.C. , Ding S.L. , Mo J.
Published: September 2013

Study of predicting chatter has been around for many years. These studies are crucial for our understanding of machining processes and to enhance efficiency in manufacturing. This paper presents a new mechanism affecting the stability of machining process called mass induced damping. This effect is simulated numerically with tested values of initial parameters taken for impact tests of a thin-walled workpiece. Results from the simulation shows minor increment in allowable depth of cut by numerically calculated using stability lobe theory. This effect will open a new understanding how certain mechanical factors would affect the value of damping of a system.
Non-Destructive Testing of Polycrystalline Silicon Solar Panel by Scan Acoustic Microscopy
Authors: Xu Zhen Ying , Gao Shu Yuan , Huang Jun , Wang Yun
Published: September 2013

The inner structure and defects of the silicon panel will influence the transfer efficiency and the stability of the polycrystalline solar cells, thus the non-destructive testing of the silicon panel is very important. In this paper, a Scan Acoustic Microscopy is applied to test the inner structure of polycrystalline silicon solar panel. From the grey image of C-Scan by the microscopy, the amplitude distribution of the bottom wave generated by the interaction between the inner grains of the polycrystalline silicon and the acoustic beam can be seen clearly. Furthermore, the defects as well as their size and position can also be tested by A-Scan, B-Scan and C-Scan with high resolution and high accuracy. The experiment results show that it is a good non-destructive method to test and evaluate the quality of the inner structure of polycrystalline silicon solar panel.
Research on the Process of Numerical Control Electrochemical Turning Based on Finite Element Method
Authors: Fu Xiu Qing , Xian Jie Yu , Kang Min , Xiao Mao Hua
Published: September 2013

The processing simulation method of numerical control electrochemical turning (NC-ECT) was presented based on the finite element method (FEM) in this paper. The three-dimensional analysis model of the electric field built in ANSYS software was solved. The current density distribution and the theoretical values of material removed depth per revolution (MRDPR) in different time on the anode were obtained. The experiments were carried out on the NC-ECT lathe, and the measured values of MRDPR were measured, which were compared with the theoretical values. It is indicated that the maximum percentage error between the theoretical values and the measured values is smaller and the simulation method meets the accuracy of the engineering calculations.
An EDNS0 Extension for IP-Based DNS Resolution
Authors: Wang Zheng , Wang Rui , Xiao Li Yuan
Published: September 2013

The popular IP-based resolution service is subject to the source address confusion especially for the remote recursive resolver. Moreover, the current practice does not provide the IP-based resolution as an optional service. The paper proposes a scheme extends the EDNS0 flags field to introduce the non-soliciting indicator and uses an EDNS0 option to include client IP information in DNS messages. This extension helps to enhance the user experience as well as the overall performance.
Building Quotient Cube with MapReduce in Hadoop
Authors: Zhang Juan , Zhang Jiong Min
Published: September 2013

In order to solve the problem that how to improve the efficiency of query and calculation in massive data, a method of building quotient cubes in Hadoop plateform which combined the advantage of the quotient cube and MapReduce model is proposed in this paper. At first, all cubes will be established and their aggregate value will be calculated in the Mapping stage. All the key/value pair formed in Mapping stage will be passed to Reducing stage. Equivalence partitioning will be carried out In this stage, and the minimum aggregation cube of each equivalence partitioning will be the key with its aggregate value. According to the minimum aggregation cubes, we can get the quotient cubes. In order to improve the speed of parallel computing and reduce network traffic, equivalence class division will be executed locally after the Map stage, it is named as combiner stage. In this paper, MapReduce model is used to improve the efficiency of building quotient cube because of its ability of parallel computing in a large amount of data. In addition, the experiment proved that, under certain circumstances, increasing the number of Mapper/Reducer task can reduce the building time effectively, and improve the construction efficiency.
Performance Optimization Method on Smart Grid Information Platform
Authors: Qian Lin , Li Dong Hui , Wu Xiao Zhi , Zhu Guang Xin , Liu Jiang Hui
Published: September 2013

In recent years, with the development of economics, Chinese government feels obliged to build a strong smart grid, state grid company starts the construction process of SG-ERP system comprehensively. However, system performance bottleneck gradually has been spotted due to expanding of IT systems. So it has important theoretical value and strong practical significance to do research on smart grid information platform. This paper proposed a framework of performance tuning for large transaction database used in smart grid based on state grid information platform construction, this method will break system performance bottlenecks, improving the service quality of the platform. The results show that the proposed method can greatly increase the quality of system running, and provide a reliable guarantee for the running in strong smart grid.
Anti-Missile Network Edge Importance Research
Authors: Xia Yu , Chen Ming Yuan
Published: September 2013

The problem about cooperation anti-missile network of warship fleet has been the research hotspot. In order to evaluate the edges for the warship fleet cooperation anti-missile network, a new approach for evaluating the critical edges is proposed by considering the influence of endpoint nodes. The method that edge betweenness is used as the index of evaluating critical edge is incomplete. Aimed at the built operation network, the method is used in the case. The result indicates that the method is reasonable and effective.
Research of Composite Ontology Mapping Strategy on the Parsing Graph
Authors: Ling Shi Yong , Gong Jin Hong
Published: September 2013

According to complex context relation of ontology, considering different input schema, ontology graph is created with general environment. Based on ontology structure, the paper constructs multiple level graph representation, By introducing similarity propagation of structural and instance level on context relation and rapid mapping with a rapid matching algorithm, a composite ontology mapping strategy is proposed, which iteratively achieves ontology mapping result with reused idea. Finally feasibility and effectiveness of the strategy is proved by complexity analysis to algorithm and some contrast test.
Implementation of a Double Sequence Encryption Scheme Based on Chaotic Map
Authors: Zhao Fu Xiang
Published: September 2013

this paper presents a new scheme for enhancing the security of full disk encryption relying on the double sequence encryption based on chaotic map in order to improve the performance of its practical implementation. The aims of the proposed scheme are to design a keystream generator for the tweakable enciphering mode in space or time sequence using the real-time embedded device through sequential change detection on the disk read-and-write request. This design of the scheme is based on re-keying principle and derived from information-theoretical evaluation. Analyses show that the scheme is provably secure and can prevent inner and outer attackers from attacking. To the best of our knowledge, the scheme offers the first comprehensive solution to the watermarking attack in the same sector.
Improvements on the Cairngorm Framework of the Service Invocation Mechanism
Authors: Gao Lu , Zhou Li Yong
Published: September 2013

in recent years, the gradual expansion of the scope of application of RIAs Flex technology. Adobe launched the Cairngorm application development framework. The Cairngorm framework is the mainstream framework for Flex application development, the framework is based on the MVC design pattern, it simplifies the application development model. The author, after a careful study of the entire framework, has made some improvements on the Cairngorm framework of service call mechanism, which proposed the Cairngorm framework of improved. The Cairngorm framework improved more suitable for small and medium-sized Web applications development and maintenance.
Development of Adjustment and Durability Test Machine Based on Automobile Steering Column
Authors: Wang Zhi Ming , Li Wei
Published: September 2013

The adjustment and durability test of steering column is an important parameter for automobiles safety, but the unified standard and test method is not yet formed. To solve the shortcomings of the traditional testers, such as less-automated, few test item, low universalness and weak ability of data report generation, this paper design a new test machine for the adjustment and durability of automobiles steering column on the basis of advanced foreign standards and test method. The test result indicated that this test machine embodies the characteristic of easy operation, stable function, and wide suitability, which improves the measurement accuracy and efficiency.
Labelling Properties of Models Related with Complex Networks Based on Constructible Structures
Authors: Wang Hong Yu , Yao Bing , Yang Chao , Yang Si Hua , Chen Xiang En
Published: September 2013

Network structure is irregular, complex and dynamically evolving in time. In the Internet of Things, we are Things. Labelled graphs are used in researching areas of many networks, cryptography, computer science, biology, information etc. For simulating real networks we construct compound split-graphs and compound split-trees having particular labellings almost in arbitrary manners by our methods. We have several algorithms in polynomial time.
Cloud Computing: A Novel Approach for Improving Service Capability of Wireless Mesh Networks
Authors: Li Ran , Lu Zi Yi , Wang Xiao Bo , Kan Bao Qiang
Published: September 2013

With the number of applications increased in wireless mesh networks (WMNs), insufficient service capability is becoming a main obstacle. Meanwhile, cloud computing is an effective approach for organizing computing resource which can improve service capability remarkably. In this paper, framework of WMNs with cloud computing is proposed. Service capability of WMNs with cloud computing is judged and scored from 6 dimensions to make a composite comparison, which is shown cloud computing will be a promising approach for improving service capability in WMNs.
Based on Mathematical Modeling in Matlab Web Mode Virtual Practice Teaching Platform and Implementation
Authors: Yang Ou
Published: September 2013

Matlab is a kind of internationally recognized and outstanding computing software. Its powerful data processing capability has been widely applied in the field of mathematical modeling. Starting from the perspective of practice teaching, there are some statements about the design of the mathematical modeling and virtual practice teaching platform about Matlab based on Web mode. Clarifying the composition and method of the system is also involved in this article.
The Study of Logistics Distribution Routing Optimization Problem Based on B2C E-Commerce
Authors: Yu Xiu Xia , Dong Ying Hong , Yue Li
Published: September 2013

This essay aims at the intelligence of logistics and distribution and uses the ideas of the systematic engineering to analyze the vehicle route optimization problem based on the characteristics of B2C e-commerce and has already established path optimization model of constraint three-dimensional distribution. According to the nearest distribution method it has transferred the multiple distribution centers VRP problem into a single distribution center problem and has designed the method of tabooing search for the initial algorithm. Ultimately it made the exchange generated method in the neighborhood search algorithm come true, and used examples to demonstrate the effectiveness of this kind of algorithm.
User Behavior Analysis Based on Gn Interface of GPRS Network
Authors: Chen Yong , Zhou Wen Li
Published: September 2013

The General Packet Radio Service (GPRS) has become a standard to extend the services provided by the Global System for Mobile Communications (GSM). Through the introduction of packet switching technology, GPRS supports the use of packet data transmission, allowing a more efficient usage of the radio resources with a consequent improvement in the quality of service of subscribers. This paper presents some observations of the real operational GPRS network in a certain city by analyzing the characteristics of the data which was captured by monitoring system deployed in the Gn interface of GPRS core network. The distributions of the activated users and on-offline users were analyzed in this paper, as well as the online duration characteristic of mobile users. At last, the distribution of users and sessions was discussed, and finally some valuable conclusions were concluded for the mobile network operators.
A Modified Method for User Authority Ranking in Chinese Microblog
Authors: Xin Jing
Published: September 2013

Nowadays, microblog has emerged as the most promising social networking service in the Web2.0 age with diverse features for information dissemination, interpersonal communication and many other aspects. Chinese microblog shows great potential owing to the rich marketing source and powerful media influence brought by the huge user population. As the microblog community is largely influenced by some authoritative users, identifying these users and understanding the information dissemination pattern are theoretically and practically significant for us to promote user services, develop further applications and seek commerce opportunities. In this paper, we proposed a modified method for user authority ranking. A user-message graph modified according to Chinese microblog was applied to our study, and an algorithm based on ObjectRank was used to calculate ueser authority scores. We analyzed Sina microblog, as it was the most widely adopted Chinese microblog and more resources for research was accessible.
Design and Implementation of a Safety Statistics Administration System
Authors: Hou Jin Kui
Published: September 2013

Using of advanced network technology and information technology, a construction scheme for unified statistical information management platform is proposed in this paper. In the scheme, the business of municipal statistics bureau is used as the center, and the scientific statistical system is used as the core. The scheme can be used as the internal service system for the subordinate enterprises and the branch of statistics bureau, which can provide business of online direct report, online surveys, propaganda, consulting, announcements and other statistical information services. The efficiency and accuracy of statistical data reporting are improved, and the labor intensity of statistical work is reduced. This approach can be used to develop a standardized management system covering the whole field of statistical business.
Asymmetric Binary Frequency Shift Keying and its Frequency Attribute
Authors: Zhang Shi Kai , Jin Jian Li
Published: September 2013

An innovative asymmetric binary frequency shift keying (ABFSK) modulation format is presented and studied both in the time domain and frequency domain. First, the modulation function is demonstrated, it shows a quasi-continuous phase attribute and an ability of high speed data modulation. Second, the domain attribute is studied; it has a high degree of energy centralization. Thus, a narrow occupied bandwidth can be achieved after a proper filtering. Then, the finite spectrum can be conserved to improve spectrum efficiency.
Network Attack Characteristics of Automatic Data Extraction Technology
Authors: Yin Pu Tian , Chan Rao Zheng , Zheng Qin
Published: September 2013

attack automatic feature extraction technology is an important research of network security technology. From the network present situation research proceed with, to attack the automatic feature extraction technology for definition and classifycation, and for each category of technology are introduced in detail, and presents several attacks of automatic feature extraction technology, finally to present these technical deficiencies and the possible development trend are discussed.
A Modeling Study of Sensor Data
Authors: Liu Feng , Wang Jian Yong , Liu Ming
Published: September 2013

Nowadays, Internet of Things (IoT) has been becoming a hot research topic. Being an important part of Internet of Things, the wireless sensor networks collect various types of environmental data and construct the fundamental structure of the IoT applications. In order to find out the characteristics of the environmental data, in this paper, we focus on four types of these sensor data: temperature, humidity, light and voltage, and employ statistical methods to analyze and model these sensor data. The results of our research can be used to solve the missing sensor data estimation problem which is inevitable in the wireless sensor networks.
Design of SSL VPN System Based on RBAC Access
Authors: Fan Ya Qin , Zhang Ge , Li Fei Fei , Zhang Xin
Published: September 2013

Abstract: in order to solve the access control system loopholes, can appear the problem of chaotic management, security failure and conflict of competence, this paper studies the access control model, on the basis of the design of a SSL VPN oriented access control system, the authentication module, access control module, role access module and security detection module design. The realization technology of system user identity. This has practical reference significance to the personnel security technology research network.
Research on Gap Analysis and Compensation of Rollers in Printing Machine
Authors: Gao Zhen Qing , Sun Han Xu
Published: September 2013

Aiming to the disadvantages of traditional gap adjustment between rollers of printing machine, a method for gaps analysis and Compensation automatically was proposed. In this research, firstly the relationship between gap of rollers and the printing density is analyzed, established a theoretical model on the influence of the printing of the printing press, and a quantitative experimental. Secondly, constructs the analysis and compensation of process printing machine roller gap, and the actual cases are described. Finally, the method of automatic adjustment for gap can simplify the operations and has practical significance.
Video Call Traffic Identification Based on Bayesian Model
Authors: Hou Ying , Huang Hai , Wang Kai , Zhu Yu Hang
Published: September 2013

This paper proposes Bayesian statistical method to identify the video traffic by the symmetrical features and coding statistical characteristics of video calls. According to the problem of high computational complexity of the non-parametric probability density estimate method in the condition of large samples, we propose grid probability density estimation method of gird division to reduce the computational complexity. We present identification results. The experimental results indicate that that this method can effectively detect video call traffic.
3DR-Tree Model Improvement Based on Enhance of Index Performance
Authors: Zhang Zhi Tong
Published: September 2013

3DR-tree is an index method using the traditional R-tree to index moving objects. Its defect is that a cube generates when an object remains still for a period of time. For those objects that remain still for a long period of time, many strip cubes will generate. MBR will be overlong or overlarge, thus increasing a great deal of overlap and reducing index performance greatly. This paper is to improve the 3DR-tree model to enhance index performance. On the basis of 3DR-tree, this paper will put forward improving historical data index performance of 3DR-tree through node splitting. 3DR-tree is provided with the online data index function by means of tree splitting.
Analyzing of Dynamic Characteristics for Discrete S-PCNN
Authors: Nie Ren Can , Yao Shao Wen , Zhou Dong Ming , Deng Hai Ying
Published: September 2013

Pulse Coupled Neutral Network (PCNN) is a new artificial neural network with biological mechanism, and has been widely applied in many areas such as image processing and so on, but its dynamic characteristics have not been analyzed effectively. In this paper, the dynamic characteristics about pulse period, refractory period and capture period in a simplified PCNN are discussed by mathematical analysis. Simulation results verify the correctness of the analysis conclusions.
Application of the CNC System Based on PMAC in Laser Forming Machine
Authors: Chun Shang , Guo Peng Fei , Yang Guang , Bian Hong You
Published: September 2013

With the research of the main structure of the CNC System, the design philosophy of the CNC System based on PMAC in Laser Forming Machine was put forward. This system takes PMAC as control model of CNC and PC as system supporting units, which is a double CPU CNC systemthe CNC system model of "PC+PMAC". A lot of experiments have proved that this system can work steadily and it can meet the demand of laser forming machine.
GSM Information Collection Design of Logistics Information System Based on Internet of Things
Authors: Lin Xing Zhi
Published: September 2013

On the analysis of logistics information collecting techniques (including the Unified Information System, The Internet Of Things, Global System for Mobile Communication ), the paper puts forward solutions and innovative ways to operate the system based on Unified Information System (UIS) in The Internet Of Things (IOT). GSM information collection, which is based on the UIS, has integrated the technologies of Radio Frequency Identification (RFID), GSM, and Computer Telecommunication Integration (CTI). With the unique characteristics of business processes of UIS and IOT, the systematic design has carried out the technical construction and interactive system design on the brandboard adjustment program of GSM information collection model, the anti-collision technique as well as Network Communication Program of GMS model controlled by AT command. This design has realized the exchange between the logistics information collection and processing and GSM network by the way of adopting the TC35i Single Chip Processor Control System, as a result, it has formed the distributed link for the logistics information system, and identified the feasibility of GSM information collecting system applied in this system.