bluuebunny/crossref_metadata_2025 huggingface dataset:
Simulation of Pattern on Computerized Embroidery Based on Image Processing
Authors: Fan Xiu Juan , Hu Shao Lin
Published: December 2012

The simulation of the pattern has been an important part in embroidery, which can estimate the field of application of the stitches effectively and save the raw material before embroidery. This paper proposes a new simulated algorithm of contour extraction and image filled for embroidery patterns based on LOG(Laplace of Gaussian)operator. The experimental results show that the algorithm can achieve the expected effect.
Adaptive Resource Allocation for the Multi-Carrier GIS Networks
Authors: Yang Ying
Published: December 2012

This paper focuses on the problem of adaptive resource allocation for the web-based GIS. The paper considers the multi-user condition and provides an optimization problem for a general utility function such that it could be nonconcave and nondifferetiable. To solve this problem, the paper decomposes the original optimization problem into the dual optimization problem, which can be easily solved by a simple iterative bisection algorithm to adaptively allocate the network resource through the web-based GIS.
Study on Optimization of Software Regressive Testing Based on RBF Neural Networks
Authors: Bai Wen Le , Zhang Yong Mei , Song Bin
Published: December 2012

In order to reduce times of software regression testing, a new research idea and method is proposed based on RBFN (Radial Basis Function Network). Using the adaptive ability of network study, regression testing is optimized by its learning strategy. The simulation results demonstrate the new method can forecast regressive testing effectively, and implement very little error. It means an important meaning for developing new effective method of soft testing in the future.
Based on Texture Feature of Color Image Retrieval
Authors: Lin Jin Hui , Zhang Ji Xiang
Published: December 2012

Along with the development of multimedia technology, large capacity image library a wide range of applications, content-based image retrieval (CBIR) technology is management and retrieval effective means. Among the contend-based retrieval techno-logiest, feature extraction is most important. For instance, color, texture and shape feature etc. But each feature of image can only catch one aspect of the similarity of image, how to represent images better has become a important research field in content -based image retrieval. Introduced the use of image texture characteristics of image retrieval method, with gray symbiotic matrix algorithm, from the block of the texture characteristics, and gives the CBIR system is realized, and the experiment results are given.
Customer Demands Data Acquire Algorithm Research
Authors: Tan Jun
Published: December 2012

Customer demand is the driving force behind the development of enterprises. It is the core of mass customization production mode that access to customer demand information, analysis and management. Questionnaire is an important way to get customer demand. This paper presents a design of closed-end questionnaire about electric bicycle which has two characteristics: (1) highlighted the access to subject features of customer. (2)The numerical answers will be processed using fuzzy logic.
Hydrothermal Synthesis of Tungsten Oxide Nanoparticles
Authors: Yao Yang Rong , Ma Rong , Song Xu Chun
Published: December 2012

In the present paper, the tungsten oxide nanoparticles were fabricated via a hydrothermal treatment of the H2WO4 precursors. The H2WO4 precursors were prepared by method of precipitation reaction between aqueous Na2WO4 and HCl solution. The products are characterized in detail by multiform techniques: scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and energy-dispersive X-ray analysis. The results show that products are WO3 nanoparticles with diameter of about 100-150 nm.
Application of Wireless Location Technology in Advertising
Authors: Fang Zheng , Yang Yang , Ren Yan Dong , Cai Jing
Published: December 2012

Recently, more and more companies are using wireless location technology to improve advertising effectiveness, such as location-targeted advertising. Location-targeted advertising involves the provision of ad messages to cellular subscribers based on their geographic locations. Location-targeted advertising opens up an innovative conduit to deliver ads and coupons that are customized to an individual’s tastes, geographical location, and time of day. Although location-targeted advertising seemingly offers practitioners tremendous potential given the ubiquitous nature of mobile devices, we know very little about it. This paper summarizes up-to-date research findings of location-targeted advertising, and makes managerial implications of how to use this technology efficiently.
The Impact of Design Factors in Mobile Application Stores on Social Presence
Authors: Zhang Lu Fang , Gao Ling Ling , Zhang Jin Song
Published: December 2012

In this paper, we try to find the relationship between design factors and social presence in mobile application stores. Social presence in mobile app stores consists of intimacy, social atmosphere and interpersonal interaction and design factors including structure design, content design, visual design and interactive design. We used semantic differential scale method to test the effects of design factors on users’ social presence. The result shows that the interactive design has significant effects on social atmosphere. Structure design has significant effects on interpersonal interaction. The result shows that design factors have significant effects on social presence. Obviously, interactive design has significant effects on social atmosphere and structure design has significant effects on interpersonal interaction.
Random Number Generation with Entropy Sources in the Graphics Processing Units
Authors: Yeom Yong Jin
Published: December 2012

The random number generator (RNG) is indispensable to modern cryptography since cryptographic services make use of random numbers for deriving encryption keys or nonces in protocols for secure communication. Operating systems like Linux and Windows provide built-in random number generators which can be accessed by cryptographic modules and other processes. If the system fails to collect sufficient entropy from the operating environment, the output from the RNG is blocked or becomes less secure. In this paper, we propose a method providing sufficient entropy to RNGs using graphics processing units. By estimating run-time of the kernel function in GPU, we can gather noisy data with bias. After the distillation process, we obtain a binary sequence for entropy input to the deterministic part of RNG. Our scheme was implemented on the computing environments using NVIDIA’s GPU GTX 580 and GTX 610M.
An Adjustable Topology Control Algorithm for Three-Dimensional Wireless Sensor Networks
Authors: Chen Yan , Wu Wen Kang , Li Liang
Published: December 2012

In three-dimensional wireless sensor networks, a topology with higher node degrees usually has many routes that consume less energy, but it increases the traffic load of the whole network. Therefore, the trade-off is between the node degree and the energy efficiency. In view of this question, this paper presents the definition and property of 3D r-neighbourhood graph, and uses the graph to balance the node degree and the energy efficiency of the whole network. This algorithm named NGTC, and it can adjust the structure of the networks to be a perfect state. Finally, the simulation results prove the advantage of this algorithm.
Study on the Miniature Picking Device for Hickory Nuts
Authors: Xu Xiao Feng , Zhang Wei , Xu Jiu Hua , Wang Jue
Published: December 2012

Following the picking characteristics of Tianmu Mountain and aiming at the technique problem and safety problem existing in the picking task of hickory nuts, new scheme of efficient picking technology adapted to the hilly area site condition is proposed and the study of miniature motive power picking device is accomplished.
Development History, Status and Trends of Plot Seeder
Authors: Liu Shu Guang , Ma Yun Fei
Published: December 2012

Plot seeder is a special seeder for field experiment on developing new varieties, breeding high quality seed and holding comparison test of varieties. The three stages of plot seeder development (germination stage, development stage and improvement stage) in developed countries and the development over 30 years in China were introduced. Working principle, characteristic and common types of plot seeder at the present time are shown. The trends of plot seeder from 4 aspects, including structure and types, application, research, manufacturers, show development of plot seeder is benign and China will make important contribution in the application for plot seeder development.
Construction of Patent Infringement Litigation Early Warning Index System for the Pharmaceutical Enterprises
Authors: Wang Ying
Published: December 2012

Our objective is to establish the patent infringement litigation early warning model and early warning indicator system for pharmaceutical companies. Reversely generate the warning model based on incentives of patent infringement litigation. A combination of qualitative and quantitative methods were used to determine the specific early warning indicators. According to the hierarchical analytical process, the three-tier warning indicator was established system including the target layer and factors, and three stages of the early warning indicator system: were put forward: preliminary warning phase, target company judging phase, and accurate early warning stage. Quantified statement was given to all the warning indicators, to establish a mathematical model.
Research on Maintenance Force Location Model
Authors: Qu Chang Zheng , Gu Hong Qiang , Gao Lu
Published: December 2012

To optimize to allocation of maintenance force in warfare, this paper extended the application of the maximal covering location problem. As the priority function being defined, a maximal covering location model based on the priority of requirement nodes was set up and a lagrangean relaxation algorithm was applied to solve the problem. A case study was given at last, which verified the model.
Statistical Analysis of the Failure Modes and Causes of the Failure Blades of the Aviation Engine
Authors: Ma Nan Nan
Published: December 2012

Based on the failure analysis of Failure Analysis Center of Aviation Industry of China in recent years, the materials selection process in the blades of the aviation engine is illustrated, the common failure modes and causes of the failure blades of the aviation engine are discussed, we found that the 90% of the common failure mode in gas turbine blades and compressor blades is fatigue and these variations may be directly linked to the mechanism of failure. This paper focuses on the important meaning of failure analysis on the security and reliability of the blades of the aviation engine. It is discovered that the blades of the aviation engine designs and the procedures of the manufacturer are key points to the security and reliability of the blades in China. The further research of comprehensive failure analysis of the blades of the aviation engine can increase the reliability of the blades under the service conditions.
Treatment of Chroma from Tannery Effluent by Flocculant
Authors: Yang Qin Huan , Zhao Chang Qing
Published: December 2012

The chroma in tannery effluent was treated by prepared flocculant at different conditions. The results showed that the suitable reaction conditions were attained at a normal temperature, pH of 8, flocculant of 0.2 g/L when the shaking speed of 150 r/min and the reaction time was 15 min. Through testing the saccharide and protein in the flocculant, it was found that the flocculant contained saccharide and protein. These may contribute to the application of the flocculant to chroma removal in tannery effluent.
Ramie Fiber Modification Trials under Different Conditions
Authors: Wang Qi Rui , Fan Wei
Published: December 2012

The test studied three ways of modification effect for ramie fiber, included PVC coated, MMA graft and silane coupling. Also the diverse factors for modification were explored under the situations of hydrophilicity, biodegradability and parasitotropism. The results showed that: All modified ways for KH-570 silane coupling, PVC coated, and MMA graft could reduce bibulous rate of ramie fiber effectively, which PVC coated was best (10.42 %), while bibulous rate of MMA graft was 10.56 %. Both of all were lower than the bibulous rate of unmodified (4-5 %). Then soaked in conditions of distilled water, anaerobic sludge and anaerobic sludge, the mass loss unmodified were largest, loss of minimum were MMA grafting, MMA grafting and KH-570 coupling, with the mass loss rate were 11.67 %,21.23 % and 22.73%,respectively. With the situation of high salt concentration, the modified fiber degraded significantly that all of the degradation rate were lower than 8%. The biological properties of ramie fiber were effectively enhanced by modification way of MMA grafted, in aspects of hydrophilicity, biodegradability. Under the condition of MMA grafting, microbial growth and purifying effect, the service life of the fiber was prolonged efficacious.
Microstructure Evolution and Property of Austenitic Stainless Steel after ECAP
Authors: Wang Li Min , Gong Zhi Hua , Yang Gang , Liu Zheng Dong , Bao Han Sheng
Published: December 2012

Ultrafine-grain or even nano-grain microstructure can be made by equal channel angular pressing (ECAP), mainly resulting from shear strain. The authors experimentally investigated 00Cr18Ni12 austenitic stainless steel and its mechanical properties during and after ECAP. The results showed that because of larger shear stress, many slipping bands occured inside grains, with the increase of pressing pass, the slipping bands may interact with each other to separate slipping bands into sub-grains, finally, the sub-grains transformed into new grains with large angular boundaries. The grain size was about 200nm after the 7th pass. After the 1st and 2nd pass, the tensile strength was higher 93% and 144% than that without ECAP, the yield strength was 5.3 and 6.6 times of that without ECAP respectively.
Isothermal Crystallization Behavior of Poly (L-lactic Acid)/ Surface-Grafted Silica Nanocomposites
Authors: Cai Yan Hua
Published: December 2012

The Poly(L-lactic acid)(PLLA)/surface-grafting silica(g-SiO2) nanocomposites were prepared by melt blending. The isothermal crystallization behavior of PLLA/g-SiO2 nanocomposites with different content of g-SiO2 was investigated by optical depolarizer. In isothermal crystallization from melt, the induction periods and half times for overall PLLA crystallization (95°C Tc 120°C) were affected by the crystallization temperature and the content of g-SiO2 in nanocomposites. The results showed that g-SiO2 as a kind of heterogeneous nucleating agent can reduce induction periods and half times for overall PLLA crystallization. The thermal properties of PLLA/g-SiO2 samples were also investigated by differential scanning calorimetry (DSC), The results showed that the crystalline degree of PLLA was improved as the presence of g-SiO2.
Influence of Different Damp-Heat Setting Techniques on Crimp-Hair Setting Effect
Authors: Wei Liang , Sun Run Jun , Dong Jie , Liu Cheng Kun
Published: December 2012

In order to investigate the persistence and stability of the human hair setting effect, different setting temperature, setting time, dry and damp conditions were designed to carry out damp-heat setting on real hair samples. Crimp recovery was used to evaluate elastic recovery of crimp hair. The tensile properties of human hair before and after setting were also tested. Results showed that crimp hair setted in the damp state presented a better elasticity than that in the dry state. With the increase of setting time, crimp elasticity increased. In the damp state, setting temperature of 114°C and setting time of 40 minutes were the best condition for the setting of crimp hair.
Process Optimization of Synchronizer Ring Gear Extrusion
Authors: Zhu Heng Yu , Lan Jian , Zhang Yong
Published: December 2012

Nowadays the immature of the precise synchronizer gear ring processing method have greatly impeded the development of the vehicle business in China. The extrusion process is a very important procedure in making precise synchronizer gear ring, but there is not any introductive and effective research yet to the issue of the optimal processing parameter in precise synchronizer gear ring procession. This research provides several processing parameters in precise synchronizer gear ring procession by means of simulating the processing in DEFORM-2D software and trying it in reality. The result shows that the whole three processing procedures have influence in the result of the gear ring. The second procedure is the most influential, followed by the fist procedure. Adjustment can be effectively conducted on the product of the first procedure by changing the fillet radius of the top die and the bottom die, R1, R2; adjustment can be effectively conducted on the product of the second procedure by changing the fillet radius of the top die and the bottom die and the angle of the upper inclination of the top die,α2. The result of this paper gives an instruction in precise synchronizer gear ring procession.
Study on the Forming Process Parameters of Sleeper Fixed Reinforcing Plate Using Orthogonal Experiment Method by Numerical Simulation Technology
Authors: Li Hai Peng , Wang Xue Xia , Wang Li Hui , Fan Jia Wei , Zhao Ju Yuan
Published: December 2012

This paper presents a methodology to design optimal forming process parameters of the sleeper fixed reinforcing plate based on the use of computer aided engineering (CAE) technology. The methodology uses Unigraphics software to establish the numerical model and DYNAFORM software to simulate its sheet forming process to determine the feasible process parameters affecting its manufacturability, including whether the mould requires the binder, binder force, friction coefficient, and die fillet radius. The forming limit diagram and the thickness distribution diagram are selected to appraise and analyze the forming results. The orthogonal experiment method is adopted to simulate the design parameters to find out the optimum values for mould design.
Prediction of a New Form of the Cutting Tool According to Achieve the Desired Surface Quality
Authors: Jurko Jozef , Panda Anton , Behún Marcel
Published: December 2012

This article presents the results of experiments that concerned on the surface roughness quality by drilling of a new Extra Low Carbon (ELC) austenitic stainless steel X01Cr14Ni9TiN. This article presents conclusions of machinability tests on new austenitic stainless steels X01Cr14Ni9TiN. The results of cutting zone evaluation under cutting conditions (cutting speed in interval vc=40-60 m/min, depth of cut ap=2.5 mm and feed f=0.01-0.12 mm per rev.).
The Casting Process Optimization of the Impellor of 65KZL Slurry Pump
Authors: Yin Ying Jie , Yuan Xing Mao
Published: December 2012

The casting process design and simulation of the impellor of 65KZL slurry pump were presented in this paper. Three kinds of casting processes were designed and simulated using ProCAST. Practical production test of those casting processes was also carried out. The simulation results were consistent with the practical production test. The optimized cast process was selected, and the quality of the impellor was improved.
Influence of Initial Temperature of Chilling Treatment on Residual Stress State of TIG Dressing Zone for T-Joint Welded Toe
Authors: Shi Chun Yuan , Zhu Ping , Zhou Kun
Published: December 2012

Using finite element method, the residual stress distribution of TIG dressed welded toe followed by chilling treatment with different temperature of steel and aluminum alloy T-joint was calculated. And the residual stresses of welded toe were also measured by using the blind-hole method. The results indicate that with the increase of initial temperature of chilling treatment, the longitudinal residual stresses in welded toe of steel joint are gradually transited from tensile residual stresses to compressive ones, and there is no significant change for transverse residual stresses; and the longitudinal residual stresses in welded toe of aluminum alloy joint are compressive stress and gradually increased, no significant change for transverse residual stresses.
Preparation and Characterization of High-Substituted Cationic Starches in Aqueous Solutions
Authors: Wu Xiu Li , Guo Ya Cui , Wang Pi Xin
Published: December 2012

In the presence of alkaline catalyst NaOH,the cationic corn starches bearing quaternary amino group with high degree of substitution are prepared by the reaction of the starch with 2, 3- epoxy propyl trimethylammonium chloride (ETA) in aqueous solutions.Under the conditions of molar ratio anhydroglucose/ETA/alkali =1: 4.0: 0.2025, reaction temperature 60°C and reaction time 6h, degree of substitution of the product is 1.0959. Structure of the product is characterized by FTIR and 13C NMR spectroscopy.X-ray diffraction indicates that the crystal structure of the native starch is destroyed and disordered structure of cationic starch is formed.
Study on Modification of UFRA by Enzyme Hydrolysis Prepared Oxidized Starch
Authors: Lin Rui Hang , Wang Xiao Bo , Zhu Xiao Feng , Gao Zhen Zhong
Published: December 2012

In this work, we concentrate on the preparation of oxidized starch modification reagent by enzymatic hydrolysis pretreatment, preparation of the urea-formaldehyde resin with low toxicity. The performance of modified urea-formaldehyde resin depend on the oxidation degree of oxidized starch and whether using enzymatic hydrolysis pretreatment or not. 100-PH9-HOS(the starch enzymatic hydrolysis then oxidized in 100°C with pH 9) synthetized modified urea-formaldehyde resin (100-PH9-HOS-UF) only with a free formaldehyde content of 0.14%, the lowest formaldehyde emission of 0.6078mg/L. Infrared spectroscopy test results show that samples at 3350cm-1 p-hydroxyl hydrogen bonds of association half-peak width minimum hefeng, amino-hydroxy hydrogen bond of association that samples are the weakest and with maximum cross-linking degrees; The modified urea-formaldehyde resin by oxidized starch curing properties of impact factors show that: the deeper drgree of oxidation, the higher curing temperature and the lower enthalpy.
Preparation and Application of Carboxymethyl Starch
Authors: Huang Xiao Hua , Li Lin , Wang Jin Yu , Zhang Guang Zhi , Tao Xu Chen
Published: December 2012

Carboxymethyl starch (CMS) was used as printing thickener, it was synthesized by carboxymethylation reaction with acid-hydrolyzed maize starch and chloroacetic acid(MCA). The optimum conditions of synthesized CMS were as follows: the ratio of nNaOH/nAGU was 3, the ratio of nMCA/nAGU was 1.5:1, etherification temperature was 65°C. The highest degree of substitution(DS) was 0.45. The maximum value of printing viscosity index(PVI) was 0.513, the best water-retention property was 0.2cm and the solid containing rate was 8%. Compared the synthesized CMS with sodium alginate, the results on printing experiments showed the properties of the CMS were almost the same as sodium alginate. Form FT-IR, it was found carboxyl functional group were show at absorption peak of 1604cm-1,1425cm-1 and 1325cm-1, it indicated that the maize starch were substituted.
Flow Characteristics of DC Plasma Torch Controlled by Magnetic Field
Authors: Wei Jian Ping , Tang Da Pei
Published: December 2012

A magneto-hydrodynamic(MHD) model of magnetic controlled DC plasma torch is presented. The model includes the Navier-Stokes and the energy equations modified by the addition of some source terms, which reflect the Lorentz force due to the self-induced and the external magnetic fields, the radiative cooling and the Joule heating. In addition, the generalized Ohm's law, and the Maxwell's equations are also modeled. The MHD model is solved with the software FLUENT . The distribution of the velocity in the torch is obtained. The results show that the larger the current size of external current-carrying solenoid coil is , the greater the radial velocity and swirl velocity in the torch outlet are.
Magnetoelectric Effect of the Ba0.80Sr0.2TiO3-CoFe2O4 Ceramic Composites by Molten-Salt Synthesis Method
Authors: Rao Wei , Li Ding Guo , Yan Hong Chun
Published: December 2012

This paper presents the structural, ferroelectric, ferromagnetic, resonance and magnetoelectric (ME) properties of multilayered ME composites fabricated using molten-salt synthesis method. The compositions corresponding to CoFe2O4 (CFO) with particle size of ~ 150 nm and Ba0.8Sr0.2TiO3 (BST) with particle size of ~ 100 nm were chosen as ferromagnetic and ferroelectric phases. The largest direct magnetoelectric (DME) and converse magnetoelectric (CME) coefficients of the multilayered ME composite were, respectively, 36 μV/cm•Oe at a bias magnetic field of 2800 Oe and 1.16×10-3G/V at a frequency of 30 kHz. In addition, the corresponding interfacial coupling coefficient was calculated to be 3.2×10-5. For the multilayered ME composite, the resonance frequency of 4.97 MHz and bandwidth of 30 kHz were obtained using capacitance-frequency spectrum method.
Study on the Technique of Filling Paste into Mine Goaf with Building Waste
Authors: Liu Yin , Guo Wei Jia , Chen Jun Tao
Published: December 2012

Some hot environmental issues existed at present such as building waste dump, mine subsidence and unexploited coal under buildings, railways, and water were analyzed, discussing the research status of building waste, as recycled aggregate, and technology of paste filling into mine goaf, then, the feasibility of filling the building waste into goaf was proposed. Finally, the paste filling orientation, strength, pumpability, stability, filling process design of recycled aggregate and benefit evaluation were analyzed.
The Numerical Simulation and Optimization of the Pre-Splitting Crack’s Length in Underground Deep Hole Blasting
Authors: Jiang Fu Liang , Sheng Yu , Li Xiang Yang , Xia Mei Qiong , Zhan Jing
Published: December 2012

The length of the pre-splitting crack is an important parameter in underground mine deep-hole blasting, and experience and engineering analogy methods are used commonly, but they seldom have scientific and theoretical basis. In this paper, the mature numerical analysis software — ANSYS/LS-DYNA was adopted, the different lengths of pre-splitting crack were simulated. In the filling body, the corresponding maximum blasting vibration velocity and stress are obtained by numerical simulation when the maximum initiation section blasted. The corresponding regression formulas are obtained by using the least square method, and the optimal length of the pre-splitting crack is 12 m through the calculation. Proved by practice, this method to get the length of the pre-splitting crack is scientific and effective, can be extended in other similar blasting engineering.
Analytic and Numerical Solutions of Load and Stress of Casing and Cement in Cementing Section
Authors: Qu Zhan , Wang Xiao Zeng , Dou Yi Hua
Published: December 2012

With the prolonged production term and the stimulation of the oil well in oil-field, the load which results from the in-situ stress is one of the main reasons to the casing damage. Taking the casing in Cementing section, the cement and the rock surrounding the cement into consideration, a mechanical model is established, while analytical solutions of displacement and stress distribution is obtained. The finite element method is adopted to obtain the numerical solutions of the mechanics model. The result shows that analytical solutions and finite element solutions are approximate. Finite element model of casing/cement/formation which is established in the paper can be used to analyze the load and stress distribution of worn casing with non-uniform in-situ stress.
Analysis of Premium Connection of Connecting and Sealing Ability Loaded by Axial Tensile Loads
Authors: Yu Yang , Dou Yi Hua , Zhang Fu Xiang , Yang Xiang Tong
Published: December 2012

It is necessary to know the connecting and sealing ability of premium connection for appropriate choices of different working conditions. By finite element method, the finite element model of premium connection is established and the stresses of seal section, shoulder zone and thread surface of tubing by axial tensile loads are analyzed. The results show that shoulder zone is subject to most axial stresses at made-up state, which will make distribution of stresses on thread reasonable. With the increase of axial tensile loads, stresses of thread on both ends increase and on seal section and shoulder zone slightly change. The maximum stress on some thread exceed the yield limit of material when axial tensile loads exceed 400KN. Limited axial tensile loads sharply influence the contact pressures on shoulder zone while slightly on seal section. Although the maximum contact pressure on shoulder zone drop to 0 when the axial tensile load is 600KN, the maximum contact pressure on seal section will keep on a high level.
Experimental Study on PC Beams Dynamic Performance with the Itial Effective Prestress
Authors: Cheng Shou Yu , Yan Dong Jin , Li Yan Zhao , Zhai Jin Ming , Cai Qing Hua , Xu Guo Xing
Published: December 2012

By the method of plane charge on the tested beams, this paper studied 6 pieces of beams， dynamic performance by 4 time loadings, displayed the deflection waveform curves, measured the bearing ability of beams with different prestress degree, analyzed the effects of the deformed performance and the ductility of the test beams with the different prestress degree. The 6 pieces of PC（prestressed concrete）beams was divided into 2 groups.
The Coupled Effects of Thickness and Distance between Holes on Stress and Strain Concentrations of Uniaxially Loaded Tensile Plates
Authors: Yang Zheng
Published: December 2012

The elastic stress and strain fields of plates containing one central hole and two auxiliary holes subjected to uniaxial tension are examined using finite element method. The interaction between holes and the thickness effect on stress and strain concentration factors are investigated. It is shown that the distributions of strain concentration factor and stress concentration factor are different in the region of stress concentration and both of them depend on the hole radii and the distance between central hole and auxiliary hole. For the finite thickness plates, the distributions of stress and strain concentration factors through thickness are not uniform in stress concentration regions. There is a strong disturbed region near the plate surface in the vicinity of central hole and auxiliary hole. The maximum values of stress and strain concentration factors and the corresponding locations depend on the r/R ratio, d/R ratio, Poisson’s ratio and thickness of plate.
Hybrid Effects on Strength of Steel-Polypropylene Hybrid Fiber Reinforced Concrete under Uniaxial and Triaxial Compression
Authors: Mei Guo Dong , Xu Li Hua , Li Shu , Chi Yin
Published: December 2012

Three different volume ratio steel fiber and polypropylene fiber were mixed into concrete matrix to study the hybrid effect of fibers. Cube HFRC specimens were tested under uniaxial and triaxial load. Hybrid effects on compressive strength of the results were analyzed and compared. It was founded that there were positive and negative effects in HFRC under compression. Positive hybrid effects of HFRC could be found when volume ratios of fiber (no less than 1.0% for steel fiber and 0.1% for polypropylene fiber) were added into HFRC.
Effect of Dynamic Compaction on Red Sand Soil Filling Embankment
Authors: Chen Chong
Published: December 2012

Abstract: The scheme and implement of dynamic compaction on red sand soil embankment, Ying(tan)-Rui(jin) expressway, is introduced in this study. The settlement of the subgrade in the field was observed. The density and the water content of it were tested. Then bearing capacity of the subgrade was detected by PFWD. All the work done is to analyze the effect of dynamic compaction on the red sand soil roadbed. It shows that the water content decreases while the strength increases with compaction. That is, the embankment is compacted effectively by dynamic compaction.
Study on Cumulative Damage of Tunnel Shotcrete under Blasting
Authors: Ma Hai Peng , Li Xi Bing , Li Ke Bin , Qiu Ming Can
Published: December 2012

A prediction model of blasting vibration peak is put forward and analyzed combined with the tunnel blasting in Changxiang highway projection. The attenuation law of blasting seismic wave in tunnel and the evolution law of cumulative damage in concrete layer are discussed in the paper. Furthermore, a detailed analysis of the damage caused by blasting vibration for different bench is presented based on the increment formula of concrete cumulative damage coming from indoor experiment with the vibration monitoring data of Shizilong tunnel, which will play a guiding role for those large-span tunnel constructions in future.
Study the Axial Force-Time History of Reinforced Retaining Wall under Earthquake Loading
Authors: Liang Jia
Published: December 2012

In this analysis, 3-D nonlinear FEM model is built in consideration of the cooperation and interaction among backfill soil, panel and reinforcement strip; the backfill soil is simulated by nonlinear static and dynamic elastic-plastic model; the reinforcement is simulated by the dual-phase enhanced linear elastic-plastic model which can describe the intensified features of the reinforcement; the interaction of soil and retaining structures is simulated by the friction-element. By comparison of before and after earthquake, result is get of the axial force difference reinforcement layer. The increased maximum location is close to toe of the wall.
The Development and Application of Slug Test in Hydrogeology
Authors: Deng Xiao Qiong , Su Ji Dong
Published: December 2012

The slug test is a field-testing method to evaluate hydrogeological parameters by recording the instantaneous change of the underground water level. Basing on abroad development of slug test, this paper tried to measure some parameters of aquifer with middle and high permeability using high accuracy testing. According to field tests and existing pumping data, discussed difference of several theoretic model, analyzed and computed the hydrogeological parameters of a certain spot in Chang Chun, China by classical Cooper Model. At last, comparing with pumping test, the accuracy of the test was verified, which supplied the theory foundation for its application and generalization.
An Assembly Process Model Involved Resource for Complex Products
Authors: Sun Gang , Li Yuan , Yu Jian Feng , Zhang Jie , Dong Liang
Published: December 2012

Fixtures, tools, and other assembly resources have an important role in the assembly of complex products, so it is very necessary to consider the interactive relationship between the resources model and the product model for assembly order planning in 3D environment. Firstly, the features of assembly process planning involved resources are analyzed. Secondly, the concept of the assembly process intention（AsmPI） is introduced，and an assembly process can be divided into an AsmPI sequence. Thirdly, based on the graph theory, a resource-involved assembly process model is built up. At last, setting a typical structure as an example, the validity of this modeling method is verified.
Dynamic Analyses of the Structure of the Horizontal Broaching Machine Based on Software of ANSYS
Authors: Xu Hu Ming , Tang Jin Yuan , Tao Xuan
Published: December 2012

The 3D model of a horizontal broaching machine is built in inventor, and the first ten natural frequencies and mode of vibration are obtained by the software of ANSYS. Dynamic response of the whole machine is also calculated in ANSYS, the weak link of the dynamic performance of the whole machine is found combined with the result of modal analyses, consequently, settings of the cutting speed and the improvement for the structure are provided.
Study the Thermal Impact of Massive Waste Material to Building Construction
Authors: Abu Eusuf Muhammad , Al Hasan Abdullah , Sidek Sharonee
Published: December 2012

This study focuses on the recycling of massive waste materials and their thermal impact to buildings, which then adapt the indoor thermal environment. It is observed that the role of construction materials modify the building interior and consequently regulates the indoor thermal environment and focus on the reduction of energy consumption at large. The rapid growth of energy consumption has raised concerns in worldwide. This has caused mainly the exhaustion of energy resources. Efficient employs of energy play a vital role in minimizing the energy usage. Having in mind the aim to seek for contextual alternative building material from waste to obtain continuing improvement in building energy performance, then this study has been designed to do experiments on locally available massive waste material (end-of-life tires, or ELTs) and investigate its thermal impact on indoor energy management strategy. For that reason, it is needed to set up an experiment to observe the role of ELT for thermal comfort in a tropical climate as compared to conventional construction materials and other waste. This contribution mainly focuses on the literature and a proposed methodology.
Design and Analysis of the Structure of the Fan Blade Maintenance Platform
Authors: Zhang Ke , Yu Chun Mao , Chen Shi Zhong , Wu Yu Hou
Published: December 2012

Abstract. This article completed the design of fan blade maintenance platform structure through the determination of fan blade maintenance platform design scheme and parameters, and then introduced the basic function, structure and working principle of maintenance platform, completed the fan blade maintenance platform from 3D viewing using solidworks. And did static analysis under 3 different working conditions on the platform through the ANSYS12.0, and calculated the intensity of structural stress and specific deformation under different working conditions. And get the results that the maximum stress and maximum deformation of the platform under 3 different conditions are 115.68MPa and 2.246mm, and it's destructive to counterweight balance guide rail and connection location of hoist installation frame and hoist. Results of analysis shows that the platform satisfies the mechanical property requirements and provides effective scheme for further optimizes choice of structural members.
Kinetics Analysis on 2PPRR-ST-2PPRR Mechanism
Authors: Luo Jian Guo , He Mao Yan
Published: December 2012

New type of 2PPRR-ST-2PPRR mechanism in singular configuration,kinetics equations and Euler’s equations constructed,complete analysis of each jointed points of the moving platform carried out,inverse kinetics solution can be obtained with the given parameters,which include the position and orientation of the manipulator,applied force on the output shaft,parameters of motion of output shaft and connecting bar and sliding block,Newton-Euler method adopted to analysis its kinetics,program used to get the intuitionistic graph result of analysis,conclusion deduced from the result,difference exist in the changing rule of force of joints on upper layer platform and under layer platform,the changing rule of force of joints on the same platform is the same,sensitive exist in direction of axis x,y,z of force of joints on under layer platform,while sensitive exist in direction of axis z of force of joints on upper layer platform only.
Mechanics Analysis of Omni-Directional Mecanum-Wheel Based on FEM
Authors: Kang Shao Hua , Zhang Xue Ling , Xie Ya
Published: December 2012

The Mechanics property is important for Mecanum-wheel structure. According to function and capacity of wheel, the structure of omni-directional Mecanum-wheel is designed and mechanical boundary condition is analyzed on different working status. On the basis of mechanical analysis, the finite element model is established and loads are applied. Strength and fatigue failure life of every parts are calculated respectively under different working conditions. The result shows that the structure and size of Mecanum-wheel is correct and meet the demand of mechanical property.
Nonlinear Dynamic Behaviors of Rotor System with Misaligned Journal Bearings
Authors: Li Ming , Li Zi Gang , Xue Ping
Published: December 2012

The dynamic modeling of a rotor system on misaligned journal bearings is discussed and its nonlinear dynamic behaviors are considered in this paper. Firstly, a dynamic model of six degrees of freedom system is established under the conditions of the long bearings, small bearing misalignment and mass unbalance. Then, the nonlinear dynamics of the rotor-bearing system, such as the displacement response and its frequency spectrum, rotor orbit and its Poincare map are analyzed by the Runge-Kutta method. The results show that at low speed the steady-state responses of the rotor system in lateral direction is synchronous, as the speed increases a serious of bifurcation phenomena and chaotic oscillations occur. In many cases, there exist the integer multiples components of the rotating speed except the synchronous one in displacement responses.
Numerical Modeling of Elastic Modulus and Bucking Load of Honeycombs
Authors: Li Ji Ne , Wang Bao Lin
Published: December 2012

In this paper, both equivalent Young’s modulus and bucking load of the honeycombs are calculated using the finite element method. Honeycombs consisting of either regular hexagonal, equilateral triangular or square cells are considered. Numerical results are systematically compared with theoretical results from other literature. It is found that honeycombs display orthotropic properties. Such a fact is different from that reported in open literature. Moreover, the buckling modes are discussed, and the modified expressions of the equivalent modulus and bucking load are given.
Numerical Simulation of Flow Field Dynamics Characteristics for One Novel Twin-Screw Kneader
Authors: Wei Jing , Liang Xin Long , Sun Wei , Wang Li Cun
Published: December 2012

The numerical simulation for dynamic characteristics of the flow field of a novel twin-screw kneader is carried out. The flow field model of the twin-screw kneader is established, and the three-dimensional, isothermal and steady numerical analysis of non-Newtonian fluid is presented based on computational fluid dynamics (CFD) theory, and the characteristics under the conditions of different speeds and center distances such as the distribution of pressure and velocity field, the maximum shear stress, the mass flow rate and so on, are studied. The research results show that: with increasing speed, the maximum flow pressure, the mass flow rate, the maximum shear stress will increase; the maximum shear stress increases first and then decreases with increasing of center distance of the screw rotors, while the mass flow rate increases with increasing of center distance; but when the center distance reaches a certain degree, the mass flow rate will be negative and the material will appear serious reflux which can lead the kneader to stopping working.
Quantum Genetic Optimization of Spindle Speed Ratio in Numerical Control Lathe with Automatic Transmission
Authors: Lin Yu Pei , Wang Yong
Published: December 2012

Determination of spindle rotate speed of lathe is an important issue when machine tools with changeable spindle gear ratio cutting metal parts, especially in heavy load cutting. Genetic optimization is used to automate design in engineering application for minimizing volume or weight. A quantum genetic optimization method was applied to calculate rotate speed and ratio of spindle transmission for gain maximum motor efficiency in numerical control lathe. Quantum bit code way was applied to simplify calculation and improve compatibility. Rotate angle strategy gate were introduced to Quantum gate for realizing evolution operation. The results were compared with a trial and error procedure usually applied. Quantum genetic arithmetic produced quite well results promptly supplying economic cutting parameters of numerical control (NC) lathe.
The Design of Gaussian Matching Model in the Optical Axis Alignment
Authors: Zhu Yi Feng , Yu Lin Tao , Shi Lei , Shang Rui Rui
Published: December 2012

In the space laser communications, Information transmission by atmospheric turbulence and background light and other atmospheric interference of the random channel. Resulting in the optical axis alignment accuracy decreased. In order to improve the alignment accuracy of the optical axis, Proposing the Gaussian fitting matching algorithm. Outdoor experiments confirmed the Gaussian fitting matching algorithm to ensure a stable spot image.
The Simulation Study on Degree of Protection/Damage under Blast Loads
Authors: Chen Yun , Wang Hua , Feng Shun Shan
Published: December 2012

The degree of protection/damage of the target is an important basis for the target structure design. In the military field, the target can be equivalent to a target metal plate with the certain thickness. The degree of protection can be divided through the effect of target plate under blast loads. Considering the reflected parameters, the reflected pressure-impulse criterion can be used to assess the damage caused by the blast. Through the combination of theoretical analysis and numerical simulation, the target plate’s pressure-impulse diagrams of different degrees are obtained. The results of the experiments and simulations are found in good agreement, which validates the numerical model.
The Finite Element Design of Air Compressors Floating Raft Impact Vibration Isolation System on Ships
Authors: Wu Gang , Jiang Guo He
Published: December 2012

A finite element model of floating raft vibration isolation system are established in this paper. The stress cloud and the natural frequencies are given based on the analysis of the static response and modes of this floating raft vibration isolation system. The calculation and analysis above may be helpful for preventing the floating raft system from working on resonant area and for keeping the oversize dynamic deformation. On this basis, vibration isolation effect has been assessed by vibration level difference
The Transmission Performances of Traction Infinitely Variable Transmission Used in Electric Vehicle Power Train
Authors: Ji Fen Zhu , Du Hao Hua
Published: December 2012

The traction infinitely variable transmission (TIVT) used in the power train of electric vehicles (EVS) was designed. Firstly, based on the analysis of basic structure and working principle, the mathematic models were established on the transmission ratio, slipping ratio, transferring torsion and transmission efficiency; Secondly, Transmission characteristics of the TIVT were analyzed and calculated using ADAMS software. The calculation results show that: the export torsion varies with sway angle of steer ring as the import torsion is fixed. The transmission efficiency of TIVT is large when the motion of driving parts is pure-rolling or the slipping ratio is less. The efficiency could be reached more than 99% by rational designing. Theoretically, the driving distance of EVS matched with TIVT could be increased.
Study on the Influence of Temperature and Stress Field to PCB’s Modal
Authors: Luo Qin , Zhang Su Juan , Zhang Xiao
Published: December 2012

With the increasing integration of electronic products, the heat flux density is increasing. Research on the heat dissipation of the PCB attracts more attention. Temperature field of the electronic products always changes a lot, usually leading to a transient stress field in the PCB. Due to the transient temperature field and transient stress field, the PCB’s modal changed. In this paper, the temperature field and the stress field are obtained to explain the reason of the change. The influence on PCB’s modal caused by the temperature field and the stress field are analyzed, on the basis of PCB’s thermal modal analysis, which provide a reference for the PCB design and modal analysis in the future.