bluuebunny/crossref_metadata_2025 huggingface dataset:
Air Compressor Piston Finite Element Analysis Based on ANSYS
Authors: Zhou Xin Xiang , Cong Tian Shu , Lei Xing Long , Yang Feng Zhen
Published: January 2015

The finite element analysis was carried out on the piston of WWD - 0.8/10 type air compressor under the action of mechanical load stress and deformation.Using three-dimensional modeling software Solidworks to establish a simplified geometric model of piston in air compressor ,Transform the model built in the three dimensional finite element analysis software into the finite element model for analysis,Determine the method of the piston by the mechanical load and boundary conditions,Completed the stress analysis and deformation analysis of the piston under the mechanical load ,The results of analysis of the piston design optimization has important reference value.
Crop Disease Leaf Image Segmentation Based on Genetic Algorithm and Maximum Entropy
Authors: Du Ming Gang , Zhang Shan Wen
Published: January 2015

Crop disease leaf image segmentation is a key step in crop disease recognition. In the paper, a segmentation method of crop disease leaf image is proposed to segment leaf image with non-uniform illumination based on maximum entropy and genetic algorithm (GA). The information entropy is regarded as the fitness function of GA, the maximum entropy as convergence criterion of GA. After genetic operation, the optimal threshold is obtained to segment the image of disease leaf. The experimental results of the maize disease leaf image show that the proposed method can select the threshold automatically and efficiently, and has an advantage over the other three algorithms, and also can reserve the main spot features of the original disease leaf image.
Experimental Study of Elastohydrodynamic Lubrication under Heavy Loaded and Variable Velocity Conditions
Authors: Miao Nai Ming
Published: January 2015

In order to reveal the elastohydrodynamic lubrication characteristics under heavy loaded and variable velocity conditions, We carried out the relevant experiments by the self-developed optical interference EHL experimental device. Improved apparatus substitute screw for the slider-crank, and driven by stepper motor. Velocity mutation experiment carried out to discuss features of the oil film while the stepper motor speed instantly changes from the velocity of 0.23mm/s, 0.38mm/s and 0.52mm/s. It shows that extrusion effect and oil film sag emerge in acceleration instantaneous similar to zero entrainment speed even it is not, and end of oil film has a necking phenomenon distinctly.
Numerical Simulation of the Fixed Assets
Authors: Li Zhong Ning , Chen Yan Li , Ma Dong Juan
Published: January 2015

With the modern economic and social development, economic research on fixed-asset investment has also become an important integral part. In this paper, Euler numerical approximation of the fixed assets model is given, and analysis proved the numerical solution of the model converges to its analytical solution.
Research on Data Mining in the Information Network Application
Authors: Zhao Xin , Huangfu Yan Hong
Published: January 2015

Turn of the century, with the rapid development of database and network technology, we produce and the ability to collect data has been rapidly increasing, a large amount of data stored in databases and data warehouses, we have been submerged in the vast ocean of data and information. People need to have a new, more effective means to a variety of large amounts of data mining in order to realize their potential, data mining is to generate and rapidly developed applications in such environments, it appears to automatically and intelligently put massive data transformation provides a means for useful information and knowledge. This article will combining data mining and e-commerce, introduced the data in e-commerce information platform mining methods, so as to provide reference for the information network of employees, in order to better analyze the hidden relationships between data and model, master user preferences, provide personalized marketing decisions for decision support network platform, to reduce the risk.
Study on the Differences in Grain Production Capacity of the Region in Jilin Province Based on Cluster Analysis
Authors: Xu Xing Mei , Cao Li Ying , Zhou Jing
Published: January 2015

According to the difference in grain production capacity of the region in Jilin province, to formulate the strategy of sustainable development of grain production in Jilin province, to provide scientific basis for related departments to establish food production decision. In this paper, cluster analysis of multivariate statistical method was used, analyzed the regional difference characteristics of grain production capacity of 25 regions of Jilin Province in 2012, and elaborated the reasons for the formation of regional differences. Through cluster analysis, the 25 area of Jilin province is divided into 4 categories. Several factors of regional location, quantity of cultivated land area and population, agricultural modernization is the difference in the main area of grain production capacity in Jilin Province.
CAE Analysis on the Precision Forging of Big Semimonocoque of Vehicle Axle
Authors: Li Ju Li , Wang Xiao Xi , He Rui , Qian Xin Xin
Published: January 2015

A CAE analysis on the precision forging of big semimonocoque of vehicle axle was conducted based on DEFORM-3D software. It discussed effects of forging billet size and shape on the forging property and effect of forging shape on the flow law of metal materials, and analyzed equivalent stress, strain distribution and load-stroke curve during the forging process. Research results are used to optimize mold structure and technological parameters. Precision forging of big semimonocoque was verified valid by practical production.
Dynamic Simulation Analysis on Slider-Crank Mechanism of the Mechatronics Fitness and Entertainment Machine Based on ADAMS
Authors: Tian Yu , Liu Min , Xu Xiao Xi
Published: January 2015

Constraints and a driving were imposed to the three-dimensional model of slider-crank mechanism of the Mechatronics Fitness and Entertainment Machine modeled and assembled by UniGraphics 6.0 for dynamic simulation analysis in order to get velocity-time curve and acceleration-time curve. Usability of model was verified by comparing to the result of theoretical analysis of slider-crank mechanism. Finally, it was achieved to design the virtual prototype.
A Comparative Study of Visual Salient Features Affect Object Recognition
Authors: Liu Jun Ling
Published: January 2015

The color, shape and texture are the basic intrinsic features of visual scene and important features for scene recognition and visual salient feature. The recognition of four targets of “bird”, “ball”, “butterfly” and “flower” under the color image, gray image, edge image and low-pass blurred image was completed in the paper through psychology experiment, and the experimental result showed that the speed to recognize the color image was quickest, it was a little slower to recognize the gray image with the same accuracy of the color image, the edge image had a great impact on the recognition of certain object, thus increasing the recognition time, the blurred image increased the time to recognize various objects while reduced the recognition accuracy. The cognitive research on the scene image’s visual feature is helpful to reveal the secrets of human information processing and explore the law for the formulation of human visual saliency.
Dynamic Characteristics Analysis of Large-Span Cable-Stayed Bridge
Authors: Shi Xiao Xing
Published: January 2015

The built-up large-span cable-stayed bridges are taken as the engineering background Integrated finite element analysis for whole bridge is applied to establish finite element model of calculative reference bridge . General finite element project is adopted to establish space finite element model for the full bridge, calculate its dynamic characteristics, combine other same types’ theoretical calculation, and analyze the dynamic characters of this kind of bridge, which provide references for the earthquake-resistant and wind-resistant design of this type of bridge.
Passenger Flow Analysis in Subway Using a Kind of Neural Network
Authors: Zhang Dai Yuan , Yang Hai Nan
Published: January 2015

This paper aims to analyze passenger flow in subway based on a kind of rational spline weight function neural network, in which the numerator of the spline is a cubic polynomial and the denominator of the spline is a quadratic polynomial, and this kind spline is denoted by 3/2 rational splines. There are many factors affecting the passenger flow. Combined the main influential factors with the self-learning method of neural network, we establish the neural network model of passenger flow in subway. This paper introduces the spline weight function neural network and the passenger flow model based on this neural network. Finally MATLAB simulation verifies that the 3/2 rational spline weight function neural network can be applied to analyze the passenger flow in subway with high accuracy.
The Research of Developing Virtual Jewelry Worn System Based on ARToolkit
Authors: Jiang Jie , Kuang Yang
Published: January 2015

This paper describes how to realize the virtual jewelry worn system based on ARToolkit technology. This technology can help consumers experience the jewelry worn on his body effect before receive the actual product, it can enrich people's online shopping experience. Augmented Reality technology lets online shoppers use the virtual goods to resolve the gap is larger between apparel goods and photos of them.
Efficient Data Mining Model Design for a Large Database in the Cloud Computing Environment
Authors: Zhao Zhan Kun
Published: January 2015

Efficient data mining model design for a large database in the cloud computing environment is studied. For large databases efficiently mining problem, an efficient data mining model in the cloud computing environment based on improved manifold learning algorithms is proposed. The use of nonlinear manifold learning algorithms is able to reduce dimensionality of data vector feature in cloud computing environments, through characteristic extraction module to preprocess data, improved classical manifold learning algorithm is adopted to increase the distance between the data of sample spread intensive area and shorten the distance between the data of sample spread sparse area, prompting even overall distribution of sample database under cloud computing environment, so as to achieve accurate mining for efficient data in cloud computing environment. The experimental results show that the proposed method can accurately mine target data under cloud computing environments, with high efficiency and precision.
Network Congestion Control Algorithm Simulation Research Based on NS2
Authors: Han Wen Zhi
Published: January 2015

Network congestion control problem is one of the most key problems in network study. This paper studies different versions of TCP source port algorithm such as Tahoe, Reno, NewReno, SACK and Vegas, and makes simulation research on linear network and dumbbell network environment algorithm by using NS2 network simulator, and finally it concludes that: when there is no competition in the network, it is better to choose Vegas algorithm; when there is competition, choose Reno, NewReno, or Sack algorithm is more advisable.
Technique for Intrusion Detection Based on NSST Domain Artificial Neural Networks
Authors: Lei Yang , Ma Jing
Published: January 2015

The issue of intrusion detection has been an active topic in both military and civilian areas, and a great many relevant algorithms and techniques have been developed accordingly. This paper addresses a novel technique based on non-subsampled shearlet transform (NSST) domain artificial neural networks (ANN) to solve the above problem, employing multi-scale geometry analysis (MGA) of NSST and the train characteristics of ANN together. Experimental results indicate that, compared with other existing conventional intrusion detection tools, the proposed one is superior to other current popular ones in both aspects of iteration numbers and convergence rates.
Theoretical Model of Suspended Floor under the Seismic Effect
Authors: Zhang Yu Xin , Zhang Wen Jin , Zhu Jin Ru
Published: January 2015

This paper proposes a new idea about damping of suspended floor in huge frame constructions. By using mode-superposition response spectrum method, the inner force and displacement in theory was obtained. Suspended floor system has economical, theoretical, social and humanistic benefits, but is not mature technically. Thus in the end, the paper proposes subsequent researching directions about damping of suspended floor system based on the basic assumption in the program.
Design of Formulation and Performance Research of Water-Borne Epoxy Modefied by 3-(trimethoxysilyl)propyl Methacrylate Anti-Corrosion Coatings
Authors: Zhang Ai Li , Chang Cai Cai , Jia Yan Hong
Published: January 2015

A waterborne anticorrosive coatings was prepared with homemade organic silicone 3-(trimethoxysilyl) propyl methacrylate modified epoxy acrylate emulsion as basic material, glass flake as anticorrosive filter and titanium dioxide as pigment and other additives. The anti-acid alkali salt, AC impedance, polarization curve tests were done to evaluate the coatings’ anticorrosion properties and to optimal its formula and process. The results showed that the best formula was: glass flake 35%, particle size 80 meshes, titanium dioxide as anticorrosive pigment 18% and the emulsion with epoxy at 45% content as base material. In this case, the coatings’ anti-acid, alkali and salt’s properties is good, the impedance values was up to eight orders of magnitude, the corrosion current was 9.59 × 10-8A and every indicator met the requirements of the JB/T224-2007 "Building with Steel Structure Anticorrosion Coatings". The water-epoxy anti-corrosion coating has safe environmental protection, zero VOC, excellent anti-corrosion properties and other indexes meet national standards.
Discussion on Application of Biotic Ligand Model - The Tool to Predict Bioavailability of Metals
Authors: Yang Guang , Zhu Lin
Published: January 2015

Biotic ligand model (BLM) is a tool with the consideration of aquatic organism would have interaction with metals in different forms. Water chemical characteristics would also have some influence with bioavailability. In this study, BLM’s theoretical basis and realization process were discussed in detail, followed by the application status of the model. Finally, current challenges and future direction of BLM were pointed out. BLM assumes that the biological effect happens during the chemical equilibrium, which means that the model might only explain the acute toxicity results.
Engineering the Topological Phase of Half Heusler Compounds by Computer
Authors: Wang L.Y. , Gao S.
Published: January 2015

Band inversion mechanisms of half Heusler compouds XMBi (X=Sc, Y, Lu, La, M=Pd, Pt) is investigated under different conditions, based on first-principles calculations with generalized gradient approximation approach. The results shown that Spin-orbit coupling, however, is not the leading cause but an account can add further fuel to the band inversion. The present finding provides an effective scheme to search for topologically nontrivial materials.
Etched Stainless Steel Powder as Novel Sorbent Material for Solid-Phase Extraction Coupled with High-Performance Liquid Chromatography for Determination of Polycyclic Aromatic Hydrocarbons in Water
Authors: Yang Xiao , Li Bao Hui
Published: January 2015

The etched stainless steel powder was prepared and explored as sorbent material for solid-phase extraction coupled with high-performance liquid chromatography (HPLC) for determination of trace polycyclic aromatic hydrocarbons (PAHs) in environmental matrices. The etched stainless steel powder was shown to be promising for solid-phase extraction of PAHs in environmental samples with subsequent HPLC separation and UV detection. This paper explored different factors that affected the adsorption efficiency of etched stainless steel powder, including the etched time of stainless steel powder, the mass of sorbent, and the volume of water sample, and so on. In the optimum conditions, nine kinds of PAHs, including trace naphthalene, acenaphthylene, fluorene, phenanthrene, anthracene, fluoranthene, pyrene, benzanthracene and benzopyrene, were extracted by etched stainless powder and the extraction efficiency is satisfactory.
Preparation and Characterization of Activated Carbon/Viscose Fiber
Authors: Wang Lu Jing , Quan Feng Yu , Che Li Jia , Xia Yan Zhi
Published: January 2015

Viscose fibers (VF) are widely used because of its good bio-compatibility and the adsorbent performance. In this paper, adsorbent fibers were obtained via wet spinning method with the mixed solution of activated carbon dispersion and viscose. The characterization of activated carbon/viscose fibers (ACVF) were evaluated by infrared spectroscopy (IR) scanning electron microscope (SEM) and Thermo gravimetric (TG). The results showed that activated carbon had already doped to the viscose. Benzene adsorbent performance research indicates that the adsorbent capacity of ACVFis better than VF.
Simulation of Temperature Field in High Frequency Induction Welding Process of Composite Aluminum Alloy Thin-Walled Tube
Authors: Liu Xiao Dong , Wang Zhi Wei , Chen Hong , Pan Lian Lian
Published: January 2015

Welding temperature is the main factor that influences welding quality in high frequency induction welding process of composite aluminum alloy thin-walled tube. The finite element analysis software ANSYS is used to simulate temperature field. One complete penetration of thin-walled tube and boundary conditions of thermal calculation are taken into account. Then a linear thermal model is used to load and calculate to draw temperature distribution and thermal cycle curves of welding process. Research results provide corresponding theoretical basis for further analysis of welding stress and strain.
Reverse Design of the Card Buckle Based on Imageware
Authors: Wang Shi Gang , Meng Fan Song , Han Yue
Published: January 2015

Using reverse engineering technology software, Imageware and UG, and taking the card buckle as a prototype for the practical application of reverse engineering, this article discusses the method of combining reverse engineering with rapid technology. Using optical system to collect images, and then through the computer image processing technology to extract edge contour digital points, using the existing CAD software processing system for the reconstruction of 3D model, and taking a detail analysis of the critical technology of surface reconstruction, using rapid prototyping technology for processing molding, so as to improve the efficiency of product design, shorten the product development cycle. And at last, through the test, we get some usual problems and solve them one by one.
Research on the W/O Emulsion Stability Influenced by the Content of Salt and Surfactants
Authors: Wang Xiao Long , Liu Yong Hong , Zhang Yan Zhen
Published: January 2015

The water-in-oil emulsion has been of great importance in the oil industry. The stability of water-in-oil (W/O) emulsion has been investigated over a wide range of parameters. These parameters are salt concentration (0-8%), nonionic surfactant concentration (0-10%), and co-surfactant concentration (0-4%). The stability of water-in-oil emulsion was studied by recording the height of emulsion at 0, 6, 12, 24h. This investigation describes the coalescence process and shows that the presence of the surfactant is necessary for stable emulsion, and stability gradually decreases with salt concentration to some degree. Moreover, the co-surfactant combined with surfactant can increase the stability of emulsion effectively.
Design of Underwater Acoustic Vector Sensor and its Elastic Suspension Element
Authors: Liu Shuang , Lan Yu , Li Qi
Published: January 2015

Acoustic vector sensor is a kind of inertial sensors. Different from pressure-sensing sensor, it can sense the angle of target under the water. Now most suspension elements are installed on the acoustic vector sensor later. This paper outlines an acoustic vector sensor which is encased in silicon rubber. In this paper, a new structure of acoustic vector sensor is present. The radial stiffness of silicon rubber spring is analyzed by using theory and simulation calculation based on the finite element software ANSYS. At last, the acoustic vector sensor is measured. The results show that the new structural design of acoustic vector sensor could reduce the adverse impact of suspending elastic suspension elements repeatedly and improve the reliability of acoustic vector sensor.
Collapsing Strength Analysis of Bending Part Casing in Horizontal Wells under Three-Point Bending
Authors: Wang Jian Dong , Dou Yi Hua , Cao Yin Ping , Ren Hu Biao
Published: January 2015

According to the mechanical characteristics of bending part casing in horizontal well, established the three-point bending casing mechanical model. By analyzing the stress distribution of casing under three-point bending, considering the effects of shear, extrusion, and bending, using the fourth strength theory and Lame formula, collapsing strength formula of bending part casing in horizontal wells under the three-point bending are derived. Effect of built-up rate on the casing collapsing strength was investigated and evaluated using analytical approach as well as FEM. The results show that built-up rate has a significant impact on casing collapsing strength, and collapsing strength of casing decreases significantly as the increasing of the built-up rate. When built-up rate is large, collapsing strength of thick-walled, large diameter casing decreases faster as the increasing of built-up rate; the casing with bigger wall thickness has bigger collapsing strength under the same borehole curvature and steel grade.
Research of ADRC in Application to the Servo System of Self-Propelled Gun
Authors: Lei Peng , Liao Xue Bing , Huang Lin Hao , Gong Chang Hong
Published: January 2015

Aiming at the problems of disturbance, coupling and fluctuation of load existing in permanent magnet synchronous motor (PMSM),which is used in the servo system of self-propelled gun, the auto disturbance rejection control technique (ADRC) is introduced into in the servo system of self-propelled gun. It can play with the best effect of the servo control system. The simulation results show that ADRC makes the servo system of self-propelled gun has better accuracy and robust.
Introduce a Negative Pressure Wall-Climbing Robot with the ARM System
Authors: Teng Di , Li Fang Xing , Gao Xue Shan , Guan Wang
Published: January 2015

This paper introduces a small negative pressure wall-climbing robot with the ARM system. It can complete the task on the surface of vertical, steep. First of all, describes the basic system structure of robot and mechanical configuration. Secondly, the mechanic analyses of robot dynamics modeling to explain the principle of its operation. Finally, an experiment tests the all common functions of the robot.
Study on Control Model of Air-Conditioning System of Air-Conditioned Train in Qinghai-Tibet Railway
Authors: Li Ya Ning , Wang Ye
Published: January 2015

The outdoor environmental conditions have great effect on the indoor environment of the air-conditioned train in Qinghai-Tibet Railway. Based on the analysis on the air-conditioning control system of the running air-conditioned train in Qinghai-Tibet Railway, considering the fresh air quantity, oxygen concentration upper limit value, contaminant concentration limit and thermal comfort simultaneously, from viewpoint of thermal comfort, a new control scheme of air-conditioning and oxygen supply has been proposed. In the new control system, both the passengers’ effects and indoor environmental effects have been considered, but also, the outdoor oxygen concentration and the outdoor atmospheric pressure are also considered as the factors affecting the indoor thermal comfort, which combine the comfort and energy-saving into one part. The study of this paper is full of theoretical meaning for promoting the technical reform, improving the management level and bettering the indoor air quality of air-conditioned train in Qinghai-Tibet Railway.
Video Analysis of Conflict Situations at T-Intersection with Cranked Priority
Authors: Petru Jan , Krivda Vladislav , Mahdalova Ivana , Skvain Vaclav
Published: January 2015

The article deals with a brief description of methodology for monitoring and evaluation road users behavior with usage of video – so-called video analysis of conflict situations, which is used for evaluation of road traffic quality in Czech Republic. There are also presented results of analysis of conflict situations at concrete T-intersection with cranked priority.
The Growth of Secondary Dendritic Arms in Directionally Solidified Al-Si-Cu Alloys: A Comparative Study with Binary Al-Si Alloys
Authors: Gomes Laércio G. , Moutinho Daniel J. , Ferreira Ivaldo L. , Rocha Otávio L. , Garcia Amauri
Published: January 2015

Experiments of vertical unsteady-state directional solidification were carried out in order to permit the influence of copper alloying to Al-Si alloys on the scale of secondary dendritic arm (λ2) to be investigated. The microstructures of Al-nSi-3wt%Cu alloys, with “n” equal to 5.5wt%Si and 9.0wt%Si, were characterized and correlated with solidification thermal parameters: the growth rate (VL), the tip cooling rate (Ṫ) and the local solidification time (tSL). A comparative analysis between the present results and those from the literature related to the secondary dendrite growth during directional solidification of Al-nSi alloys is also conducted. It is shown that the addition of Cu to both Al-nSi alloys decreases λ2, and experimental growth laws relating λ2 to VL and ṪL are proposed for the ternary alloys examined. The experimental scatter of λ2 is also compared with the only theoretical dendritic growth model from the literature for multicomponent alloys, and it is shown that the theoretical predictions overestimate the present experimental results.
A Research of Intra Prediction Coding with Variance of Prediction Mode Number
Authors: Zheng Wei , Ye Long , Wang Jing Ling , Zhang Qin
Published: January 2015

Intra prediction is a key step in H.264/AVC to improve the coding performance with the idea that removing the directional redundancy among neighboring blocks. In order to cover more directional information existed in the image frames, there are usually many prediction modes can be selected in the state-of-the-art coding frameworks, but more bits are also needed to encode the prediction mode index information, then how to achieve the maximum overall bit-rate reduction became a problem. In this paper, 16 kinds of prediction modes are adopted by considering the direction information for 8x8 image blocks. Through calculating the bit-rate both for the mode index and residual image under different number of prediction modes, we obtain the most suitable prediction mode number relatively from the graphs. Experimental results show that, with the increase of prediction mode number, the residual information decreases obviously, and the sum of residual information and prediction mode index information also decreases but levels off after reaching a certain mode number, even has an obviously rising trend.
Oxidation of TiAlCrSiN Thin Films at 1000°C in Air
Authors: Kim Min Jung , Lee Dong Bok
Published: January 2015

TiAlCrSiN thin films consisting of alternating TiCrN and AlSiN nanolayers were deposited by cathodic arc plasma deposition, and oxidized at 1000°C in air. When oxidized for 10 h, about 1 μm-thick oxide sale formed, and its surface was covered with numerous tiny oxide crystallites. When oxidized for 30 h, about 2.5 μm-thick oxide scale formed, and began to spall from the surface. When oxidized for 80 h, the oxide sale was about 12.2 μm-thick. The film had a reasonable oxidation resistance due mainly to Al, Cr, and Si, which formed protective oxides.
The Model of Evaluating Teaching Quality Based on BP Neural Network Algorithm
Authors: Bai Lei , Guo Xiao Xin
Published: January 2015

Teaching quality evaluation plays a key role for universities to improve its teaching quality and becomes a hot spot research field for related researchers. In this paper, we established the evaluation model of teaching quality based on BP neural network. Firstly an evaluation index system of teaching quality is designed. Then, according to the system we design the structure of BP neural network, determine the parameters and give the algorithm description. Finally, we program and verify the validity of the model in MATLAB environment. The experimental results show that the model can evaluate teaching quality practically by the evaluation index.
Passive House and Construction Standard: Example Design and Multi-Objective Optimization
Authors: Poyraz Kağan
Published: January 2015

Due to environmental and energy matters, importance of future construction trend-Passive House Design is increasing all over the world. In Europe, already recommended values ​​for passive buildings are included in thermal insulation standards and energy regulation directives. There is a wide range of construction materials nowadays. The key point is using proper techniques by harmonizing correct practice and materials. In this regard, smart optimization set-up approach is necessary in order to achieve the most suitable design which has the lowest CO2 and SO2 values and appears as the cheapest option. The sample given in this paper is an example of an exterior wall design for residential passive houses (heat transfer coefficient (U) value through the cross section is 0,108 W/m²K). Connected with the aim of the paper, which is showing an multi-objective optimization method for choosing the best thermal insulation design in the case of that more than one projection, results of given example design in the paper is used. Simultaneously, criteria of total thickness, heat transfer coefficient (U) through the cross section, global warming potential (GWP), acid produce (AP), primary energy content (PEI) non renewable and cost in 2013 per m2 are included in “Smart optimization set-up approach diagram”.
Characterization of Cement Pastes Containing Natural Zeolite as a Pozzolanic Admixture
Authors: Pavlík Zbyšek , Fořt Jan , Pavlíková Milena , Kulovaná Tereza , Černý Robert
Published: January 2015

A possible use of natural zeolite originating from a mining area in South Slovakia as a pozzolanic material suitable for the partial cement replacement in composite production is studied. Measurement of chemical composition of natural zeolite is performed using XRF analysis. The particle size distribution of zeolite and dry paste mixtures is accessed on laser diffraction principle. For the tested pastes, basic physical properties and mechanical properties are determined. The obtained results indicate a good potential for the application of natural zeolite in the composite mix design.
Antibacterial Properties of Rose Bengal Immobilized in Polymer Supports
Authors: Valkov Anton , Nakonechny Faina , Nisnevitch Marina
Published: January 2015

Photosensitizers immobilized in polymers can serve as antibacterial surfaces or coatings and can be applied for disinfection of water or medical instruments. The antibacterial activity of the immobilized photosensitizers is based on their excitation by visible light followed by energy transfer from the photosensitizers to oxygen dissolved in an aqueous phase which produces reactive oxygen species that cause irreversible damage to bacterial cells. The photosensitizer Rose Bengal immobilized in polystyrene, polycarbonate and poly (methyl methacrylate) was shown to eradicate Gram-positive Staphylococcus aureus bacteria under moderate illumination.
Durability of Calcium Sulphoaluminate (CSA) Composite Cement-Based Materials Made from Municipal Solid Waste Incineration (MSWI) Fly Ash
Authors: Guo Xiao Lu , Shi Hui Sheng , Hu Wen Pei , Wu Kai
Published: January 2015

Municipal solid waste incineration (MSWI) fly ash was successfully used as a main raw material in sintering and preparing calcium sulphoaluminate (CSA) cement in laboratory. This work focused on effects of cement additives of MSWI fly ash, lime powder (LI), fly ash (FA), and slag powder (SL) on the durability of CSA cement-based materials. Compared with the hardened cement containing 10% MSWI fly ash alone, compressive strengths of samples containing 20% combined additives was improved significantly. When 20% combined additives were added the resistance to shrinkage, carbonation and sulfate attack was strengthened while the combined additives had negative effects on the resistance to water permeability.
Thermal Analysis of Sisal/Epoxy Composite Processed by RTM
Authors: Milanese Andressa Cecília , de Carvalho Benini Kelly Cristina Coelho , Cioffi Maria Odila Hilário , Voorwald Herman Jacobus Cornelis
Published: January 2015

Nowadays, polymeric composites reinforced with natural fibers are being considered in the civil engineering area. The use of polymeric composites to reinforce degraded timber structures can improve its behavior. Fibers with larger structural applications are glass and carbon but the use of natural fibers is an economical alternative and posses many advantages such as biodegradability, low cost and is derived from natural and renewable sources. Epoxy composite reinforced with sisal fabric was processed by resin transfer molding (RTM) at room temperature and this work studies thermal behavior and its respective mechanism of thermal decomposition. Samples of sisal fiber, epoxy resin and sisal/epoxy composite were characterized by Thermogravimetric Analysis (TGA) and Differential Scanning Calorimetry (DSC). Thermogravimetric curves showed that sisal fibers can be used in manufacturing process where the processing temperature does not exceed 177°C and shown that the epoxy resin has the greatest stability material followed by sisal/epoxy composite.
An Energy-Awareness and Congestion-Avoidance Routing Protocol for Mobile Ad Hoc Networks
Authors: Xu Jian
Published: January 2015

An energy-aware and congestion-avoidance routing protocol for mobile Ad Hoc network is proposed in this paper. The protocol modifies RREQ of AODV by adding some fields including energy and load information. When nodes forward RREQ they also rewrite these fields with their own situation. So the destination node can find a shortest route without low-power nodes and high-load nodes to avoid instable route most probably. On the other hand, the protocol can protect low-level energy nodes and avoid congestion.
Preparation and Characterization of Palygorskite/PAM Composited Thickener
Authors: Lu Jia , Wang Jia Jia , Tian Xiao Xiao , Jin Ye Ling , Chen Jing , Ding Shi Jie
Published: January 2015

Palygorskite/polyacrylamide (PAM) composited thickeners were prepared via in-situ polymerization. To optimize the preparation, the dependence of the viscosity, rheological properties and electrolyte resistance of the composited thickeners on the initiator concentrations, sodium hydroxide concentrations and palygorskite contents was investigated. By measuring their dynamic rheological properties, thickening mechanism of composited thickeners was explored. The composited thickeners showed excellent electrolyte resistance which represented good synergistic effect of inorganic/organic composited thickener.
Research and Implementation of LXI Auto Discovery Mechanism
Authors: Zhang Xi Jun , Liu Hao
Published: January 2015

Instrument discovery as defined by the LXI standard implements the VXI-11 instrument discovery protocol. This mechanism allows the user to quickly discover instruments on a local subnet. The paper describes how to implement the auto-discovery RPC server compatible with LXI standard. For better understanding auto discovery process, it starts by introducing the VXI-11 protocol stack and follows with the deep analysis of auto discovery process. Finally, it discusses how to implement the RPC server. The RPC server supports both windows XP and windows CE operating system. The auto-discovery RPC server passes the tests on the Elgar LXI Browser, Agilent IO Library Suite and NI Measurement and Automation Explorer.
A New Type of Joint and its Numerical Analysis
Authors: Li Chuan Jun , Huang Wan Wan , Wang Zhi Qiang , Li Kai , Han Bin
Published: January 2015

In order to intelligently switch the working status of production string between oil production and testing in the heavy oil thermal recovery, as well as to improve oil exploit efficiency and reduce the exploitation cost, a new transformation joint was designed. Based on the hydraulic fluid controlling principle, caused by the one-way valve opening and closing, the positive and reverse pressure pushed the sealing cylinder to the left or the right. And the transformation between the two states could be achieved. The K-ε model of CFX software was used to simulate the internal flow field of the device under four different opening status of the one-way valve. By analyzing the distributions of pressure and velocity, the energy loss of the device in the oil state was gotten, and the method were found to optimize the design of the flowing channel for reducing the energy consumption. The results show that the design of the device satisfies the operation requirements of thermal recovery, the means to further improve the device is obtained, and it significantly improves the efficiency of measuring oil reservoir parameters.
Numerical Analysis on the Behavior of Autoclaved Aerated Concrete Block Infilled Wall Subjected to Gas Explosion
Authors: Xu Wen Xuan , Bao Qi , Li Zhan , Fan Jun Yu
Published: January 2015

As a common threat to the public safety, gas explosion and its damage on structures have drawn more and more attention in the academic fields. In this paper, a series of numerical simulations are conducted to study the behavior of autoclaved aerated concrete block infilled walls under gas explosion loading. Firstly, considering the difference between the blocks and the mortar, a refined numerical model is established, and the constitutive model of Brittle Damage in LS-DYNA is hired to describe the material behaviours of both materials. Based on the laboratory material test data, the parameter of the material model are selected reasonably. Then, massive numerical calculation is carried out and the dynamic response of autoclaved aerated concrete block infilled walls is captured and discussed. At last, the anti-blast ability of block infilled walls is compared with that of clay infilled wall of the same thickness. It is found that the anti-blast ability of block infilled walls is weaker than the clay infilled walls for the difference of material density and boundary conditions.
Non-Linear Numerical Simulation on Hysteretic Behavior of SRC Columns
Authors: Li Kai Wen , Li Zhi Yang , Wan Xin , Liu Fei
Published: January 2015

In order to study the mechanics properties to of concrete columns with embedded steel, two groups contrasting analysis models referring to SRC column and RC column are established by using finite element software ABAQUS. Both Static and cycle force are conducted. Analytical results show that bearing capacity and deformation ability of steel embedded reinforced concrete columns (SRC) under static loading are obviously higher than those of the reinforced concrete column (RC). Under the cycle force, the hysteresis circles of the SRC columns are fuller than RC column. The capability of energy consumption of the SRC columns is almost 1.4 times more than the RC columns. Further axial pressure coefficient and stirrup ratio are considered as parameters to study hysteresis characteristics, energy dissipation and the influence of the skeleton curve of SRC columns. The analytical results demonstrate that the hysteresis characteristics and energy dissipationare different with the changes of axial pressure coefficient. Meanwhile, the stirrup ratio of SRC column has little effect on energy dissipation. The study results have some value on the design and application of the SRC columns.
Comparison of Removal Efficiency of Formaldehyde by Chlorine Dioxide, Photocatalyst and Active Carbon
Authors: Wu Ming Song , Xu Xin Yang , Xu Xun , Wang Xue Ting , Zhao Xia Ting , Pei Miao , Ma Xiao Hui , Wang Ming Ze , Wang Fei , Li Jia Xi
Published: January 2015

In order to find out the real treatment efficacy of common used formaldehyde-removal product. Comparison study was conducted at different reaction time and dosages in 5L glass-made device using photocatalyst, active carbon and chlorine dioxide, respectively. The results showed that all the three methods can remove formaldehyde effectively. Photocatalyst and chlorine dioxide react with formaldehyde more quickly. As to 1.0 mg/m3formaldehyde, using more than 0.3mL photocatalyst or 30mg/L chlorine dioxide for 30min is suitable, while 2mg/L and 18h is needed by active carbon.
A New Kind of Material for HPLC – Dioscin-Bonded Silica Gel Stationary Phase
Authors: Li Xin Yi , Gu Xiao Juan , Shen Bao Chun
Published: January 2015

A new dioscin-bonded silica gel stationary phase with natural active ingredient for high performance liquid chromatography was prepared by one-pot reaction method, using 1,6-diisocyanate as the spacer arm. The structure of new stationary phase was characterized by solid-state NMR techniques, infrared spectroscopy, elemental analysis, thermogravimetric analysis and scanning electron microscope. These results show that the dioscin has been bonded to the silicia gel. The resulting stationary phase containes 127.6 μmol/g dioscin ligand. The chromatographic performance of this new stationary phase was evaluated by different kinds of solute probes. The results illustrate that the new stationary phase has a typical reversed phase chromatographic property, meanwhile it could present various interactions with solutes. The HPLC fingerprint of PNS(Panax Notoginseng saponins) API(active pharmaceutical ingredient) on the dioscin-bonded silica gel stationary phase was established. The mobile phase was consisted of gradient acetonitrile and water. The detection wavelength was 203 nm, the column temperature was maintained at 35 degrees Celsius, the flow rate was 0.8ml/min and the injection volumn was 15 μL. The contents of the 5 co-possessing components were determined simultaneously. A new material for HPLC was made by natural product. The using of dioscin-bonded silica gel stationary phase provides a new idea in natural products research.
IR Spectra and Discharge Performance of Fluorinated Bamboo Charcoals
Authors: Huang Ping , Lu Jia Chun , Jiang Sheng Bo , Liu Zhi Chao
Published: January 2015

Li/graphite fluoride (GFx) cells have been widely noticed during the past decades due to its highest theoretical capacity, high energy density, long shelf life, safety and a wide operating temperature range in primary lithium batteries. Bamboo charcoal is cheap and widely used carbon with high specific surface area and large layer spacing, which is suitable to be fluorinated to form carbon fluoride. Five products with varied fluorine and color were obtained by fluorinating bamboo charcoal under varied reaction conditions. FT-IR spectra of these FBCs were studied. The absorbance peak related to C-F band was involved into five Gaussian peaks, and the area of each peak was calculated. The specific discharge capacity of each product was measured by galvanostatic discharging at 0.01C rate. It is turned out that there is a positive linear relationship between the specific capacity and the percentage of the peak area related to semi-covalent covalent C-F, if the carbon in the products was removed. The discharge curves showed that the discharge process could be divided into three parts. The pure compound corresponding to the first part of the discharge is the target material we actually want.
The Collision Behavior of Droplets Splitted from a Droplet that Rebounded on Super-Hydrophobic Surface
Authors: Huang Zheng Yong , Li Jian , Wang Fei Peng , Xia Huan Huan , Li Mao Chang
Published: January 2015

Droplet rebounding on super-hydrophobic surfaces is critical to suppress pollution flashover (i.e. enhancement of pollution flashover-voltage) and to reduce ice accumulation on insulators. This paper presents a novel way to reduce water accumulation on surface via the elastic collision between droplets splitted from a droplet that has rebounded from super-hydrophobic surface. The water-mass that contacted with surface will be reduced resultantly. The influence of hydrophobicity of the surface on contact time and spreading time of water droplets are discussed. The collision behavior between the splitted droplets is indicated by the surface charge that was induced by the rebounding droplets on super-hydrophobic surface. Experimental results show that the super-hydrophobic surface endows water droplets with shorter contact time, spreading time than those values obtained on a bare glass. Specific Web and Reynolds numbers can lead to the elastic rebounding between water droplets, delaying the water contact with the super-hydrophobic surface. The contact electrification between the rebounded droplet and the super-hydrophobic surface renders the droplet charged, thus determines the collision behavior of the splitted droplets that born from the rebounded droplet.
Analysis of the Mechanical Properties of TC4-6061 Composite Plate Based on Classical Laminate Theory
Authors: Wang Qiang , Liang Li Lin , Peng Chao Nan
Published: January 2015

The calculation formula for the mechanical properties of TC4-6061 composite plate was deduced based on classical laminate theory. The stiffness, the strength, the specific stiffness and the specific strength for the plates was calculated by using the formula. The results show that with increasing of the relative thickness of titanium alloy layer, the tensile stiffness, the bending stiffness, the tensile strength and the bending strength increase rapidly, the tensile stiffness and tensile strength change little, the bending stiffness and specific bending strength first increase and then decrease.
Story-Based Stability Analysis for Evaluating Story Buckling Load of Frames
Authors: Jiao Fei Xiang , Gu Xiao Qin , Li Zuo Wei
Published: January 2015

This paper presents a kind of optimum modeling method for evaluating system buckling load of plane sway frames, based on the research of the different correction coefficientβ. The buckling load of plane sway frames was calculated by using the optimized method, and the results were compared with those of the ANSYS. It is verified that the simplicity, accuracy and applicability of the method.
The Influencing Factors’ Identification and Analysis of Rockfill Dam Slope’s Stability in Tailing Pond Based on RS and PCA
Authors: Jiang Fu Liang , Yang Zeng Guang , Li Guo Hui , Feng Sheng Yang , Lei Bo
Published: January 2015

In order to intensively study the stability influencing factors of rockfill dam slope in tailing pond, it was simplified to the common rock slope. And the data of 45 groups of circular failure slope was collected, based on the discrete normalization, the condition attributes of influencing stability were reduced by Rough Set theory (RS), at the same time, the stability influencing factors were simplified by Principal Component Analysis (PCA). Combining the two results through the above two methods, the main affecting factors of the rockfill dam slope’s stability are: rock density, slope angle and the angle of internal friction. The study conclusion can provide the decision-making basis for the rockfill dam design and safety management, and also be used as the foundation for other intelligent algorithm to predict the dam safety coefficient.