bluuebunny/crossref_metadata_2025 huggingface dataset:
Éducation à l'environnement, éducation au développement durable : la double rupture
Authors: Matagne Patrick
Published: December 2013

L'objectif de cet article est d'identifier et de caractériser une double rupture, sociétale et épistémologique, entre l'éducation à l'environnement (EE) et l'éducation au développement durable (EDD). Cette double rupture, ignorée par les instructions officielles de l'Education nationale, a pourtant des effets éducatifs non négligeables. Après avoir présenté dans une première partie la manière dont le système éducatif français tente de construire une forme de continuité officielle entre l'EE des années 1970 et l'EDD des années 2000, la double rupture sera contextualisée et analysée dans une deuxième et une troisième partie, pour enfin ouvrir la discussion sur les fondements épistémologiques, les fonctions sociales et les finalités de l'EE et de l'EDD. Ce texte s'appuie sur des recherches visant à expliciter les enjeux de l'environnement et du développement durable, les postures éducatives induites par l'introduction de l'EE et de l'EDD.
L’expertise pour les politiques nationales de biodiversité en France : quelles stratégies face aux mutations en cours ?
Authors: Coreau Audrey , Nowak Claire , Mermet Laurent
Published: December 2013

Le paysage français de l’expertise scientifique sur la biodiversité, mobilisée dans la construction des politiques publiques de protection de la nature, fait l’objet depuis une dizaine d’années d’une intense activité de réforme et de création institutionnelles. Cette étude exploratoire s’appuie sur des entretiens avec un panel d’acteurs agissant à l’interface entre les connaissances et l’action publique. Le champ de l’expertise, en biodiversité comme pour d’autres domaines, est le lieu d’une difficile rencontre entre science et politique. L’inconfort ressenti vis-à-vis du fonctionnement actuel des dispositifs d’expertise est souvent avancé comme argument pour justifier les différentes réformes engagées ces dernières années. Notre travail montre cependant qu’à l’inverse le foisonnement institutionnel récent est source de déstabilisation pour les acteurs, tant du côté des scientifiques que des décideurs politiques. Pour répondre malgré tout à la demande d’expertise, le positionnement des experts peut être décrit par trois figures archétypales - le « garant » de la qualité scientifique, le « gardien » des principes de protection de la nature et l’« agent » spécialisé dans l’expertise au plus près des politiques - dont la légitimité et le pouvoir ont évolué au cours du temps, au détriment des « gardiens ». Cette situation est analysée au regard des enjeux stratégiques de chacun des acteurs et des évolutions récentes du contexte académique et des modes d’élaboration des politiques publiques. Enfin, de nouvelles perspectives de recherche sont identifiées pour approfondir ces résultats.
Cooperation Patterns and Adaptation Patterns for Service-Based Inter-Organizational Workflows
Authors: Saida Boukhedouma , Mourad Oussalah , Zaia Alimazighi , Dalila Tamzalit
Published: December 2013

Modernization is an effective approach to making existing mainframe and distributed systems more responsive to business needs. SOA is an adequate paradigm that allows companies to tap into the business value in their current systems for rapid future changes to the business model. In their research works, the authors focus on the use of SOA to implement Inter-Organizational WorkFlows (IOWF). The goal is to take benefits from SOA advantages like interoperability, reusability, and flexibility to deal with process models flexibly enough. This chapter focuses on specific IOWF architectures: the “chained execution” and the “subcontracting.” First, the authors define Service-Based Cooperation Patterns (SBCP) suitable to these IOWF architectures; a SBCP is defined through three main dimensions: the distribution of services, the control of execution, and the structure of interaction. The second issue of the chapter consists of adaptation and evolution of IOWF process models obeying to the defined SBCP. Conformably to the three dimensions of SBCP, the authors define three classes of adaptation patterns: “service,” “control flow,” and “interaction.” Also, the authors particularly distinguish operations of evolution of process models based on two perspectives: the expansion of the global functionality of the process and the expansion of the cooperation. For implementation, the authors consider BPEL processes.
Reverse Innovation and the Bottom of the Pyramid Proposition
Authors: Radojević Nebojša , Peerally Jahan Ara
Published: December 2013

Analysing cases from India, this chapter reveals flaws in recent claims that reverse innovation can resolve some of the world's most urgent social problems. Reverse innovation implies the diffusion of innovations from developing to developed countries, and is therefore, per se, irrelevant for the social needs of the former. If understood more broadly, as a strategic approach, reverse innovation may reduce some dimensions of inequality. However, as an instrument of poverty reduction, reverse innovation equals the known and compelling but doubtful proposition that developed country multinational enterprises may induce large-scale prosperity simply by doing business with the world's poorest. In this chapter, the authors assess the social impact of reverse innovations and contrast previous wholesale claims on those impacts with an in-depth analysis. The authors’ analysis reveals that these social impacts are not as significant as currently believed. The chapter concludes by suggesting future research avenues on the bottom of the pyramid, which will be of key relevance to academics and managers alike.
Innovation in Learning and Rise of the Internet
Authors: Rahman Hakikur
Published: December 2013

Innovation includes almost all spheres of human life and society with the upsurge of technology. Ranging from basic human needs, societal requirements, capacity development, and knowledge management to advanced researches, all are dependent on technologies and invariably driven by innovation. Learning is an essential element of human development. From the very beginning of capacity development, learning has become an important aspect in terms of individual or collective knowledge acquisition. This chapter broadly focuses on human development through utilization of innovative approaches of Information and Communication Technologies (ICTs), especially the Internet. The specific research focus is to find out the trend of the Internet usage with respect to gender, age, and region, and deduct a relationship of the growth of the Internet user in adopting strategies like open innovation on introducing tools like interactive learning for the overall human development.
A Systemic Perspective for Supporting Production and Innovation in Brazilian Micro and Small Enterprises
Authors: Pessoa de Matos Marcelo , Arroio Ana , Borin Elaine
Published: December 2013

The objective of this study is to provide an overview and to discuss the recent Brazilian experience in formulating and implementing policies for promoting Micro and Small Enterprises (MSEs), especially considering the initiatives that depart from a systemic approach to promote production and innovation. The chapter emphasizes some crucial issues in the discussion of industrial and innovation policy, such as the adequacy of the instruments, the institutional set-up and the effective and potential convergence of different types of policies to support MSEs under the header of Local Innovation and Production Systems (LIPS). Data on the performance of MSEs in general and those inserted in LIPSs in the recent period suggest that the diversified set of initiatives had a considerably positive impact, especially in relation to formalization, access to credit, and incremental improvements and innovations. On the other side, the articulation of actors for enhancing interactive learning processes and technical training deserve more attention. Positive prospects for the promotion of MSEs, based on a systemic approach, are related to LIPS policies that articulate main policy vectors: science, technology and innovation, industry, and regional and social development.
Sources of Institutional Capability for Innovation in China’s Catching up Economy
Authors: Greeven Mark
Published: December 2013

What are the sources of institutional capability of innovating firms in China’s catching up economy? Firms may develop an institutional capability that offsets the risks of underinvestment in and inaccessibility of resources in the institutional context of a catching up economy. By combining insights from the resource-based view and institutional theory, the authors contribute to the institutional approach to innovation by suggesting that firms can take over certain institutional functions. In this explorative study of entrepreneurial software ventures in Zhejiang, China, the authors identify three sources of institutional capability: local knowledge sharing, legitimacy creation, and strategic flexibility. The findings suggest that the presence of these sources enhances the potential of a firm to create an institutional capability for innovation.
An Agile and Modular Approach for Developing Ontologies
Authors: Gobin Baby A.
Published: December 2013

Ontologies are used to represent human knowledge in a machine-understandable format. Knowledge exists in all domains and the proper capture and utilization of the knowledge is very important. Many ontology engineering methodologies are available for the development of ontologies. However, they suffer from their heavy weight nature and make the development process tedious. In addition, the resulting ontologies are monolithic ontologies and are not easy to reuse. Therefore, an agile and modular method is proposed to develop ontologies. The ease of use of the method is tested by a group of 68 inexperienced ontology engineers who compare it with Ontology 101 by developing ontologies in the e-Government domain using both methods.
Stages of E-Government Maturity Models
Authors: Rahman Hakikur , Ramos Isabel
Published: December 2013

E-Government and e-Governance are the two terms within the governance system that need to be attended through clarity, distinctness, and justification. No matter how the stages of the governance system evolve, where they have been applied, and in which stages they are at a present moment, these two prominently distinct elements of the governance systems are yet to be watched closely and minutely. After synthesizing existing e-Government maturity models and exploring relevant literature, this chapter proposes a new model that may guide e-Government implementation in a developing world context. It is expected that the proposed model would assist researchers, academics, and policy makers in establishing sustained e-Government model in emerging and developing economies.
Multi-Document Summarization by Extended Graph Text Representation and Importance Refinement
Authors: Mirchev Uri , Last Mark
Published: December 2013

Automatic multi-document summarization is aimed at recognizing important text content in a collection of topic-related documents and representing it in the form of a short abstract or extract. This chapter presents a novel approach to the multi-document summarization problem, focusing on the generic summarization task. The proposed SentRel (Sentence Relations) multi-document summarization algorithm assigns importance scores to documents and sentences in a collection based on two aspects: static and dynamic. In the static aspect, the significance score is recursively inferred from a novel, tripartite graph representation of the text corpus. In the dynamic aspect, the significance score is continuously refined with respect to the current summary content. The resulting summary is generated in the form of complete sentences exactly as they appear in the summarized documents, ensuring the summary's grammatical correctness. The proposed algorithm is evaluated on the TAC 2011 dataset using DUC 2001 for training and DUC 2004 for parameter tuning. The SentRel ROUGE-1 and ROUGE-2 scores are comparable to state-of-the-art summarization systems, which require a different set of textual entities.
Novel Text Summarization Techniques for Contextual Advertising
Authors: Armano Giuliano , Giuliani Alessandro
Published: December 2013

Recently, there has been a renewed interest on automatic text summarization techniques. The Internet has caused a continuous growth of information overload, focusing the attention on retrieval and filtering needs. Since digitally stored information is more and more available, users need suitable tools able to select, filter, and extract only relevant information. This chapter concentrates on studying and developing techniques for summarizing Webpages. In particular, the focus is the field of contextual advertising, the task of automatically suggesting ads within the content of a generic Webpage. Several novel text summarization techniques are proposed, comparing them with state of the art techniques and assessing whether the proposed techniques can be successfully applied to contextual advertising. Comparative experimental results are also reported and discussed. Results highlight the improvements of the proposals with respect to well-known text summarization techniques.
Damage Identification Method for Irregular Continuous Box Girder Bridge Based on RBF Neural Network Optimized by PSO
Authors: Liu Han Bing , Sun Ping Yi , Tan Guo Jin , Wang Yan Hua
Published: December 2013

A damage identification method suitable for the characteristics of the irregular continuous box girder bridge is presented. The damage index structured by the ratio of mode shape and relative change in strain mode is represented as input data to identify the structure damage by means of PSO-RBF neural network. Finally, the numerical simulation calculation for the damage identification of an irregular continuous box girder bridge with the length of 4×30 meters verifies the feasibility and validity of the proposed method.
Research on Static Performance of Composite Shear Wall with Insulation Layer
Authors: Song Xiao Ruan , Niu Wei , Shan Wen Chao , Zhu Xiao , Wang Yong Meng
Published: December 2013

A new type of composite shear wall with insulation function is proposed, the inner layer of which is made of cement-base composite formworks produced by our research group in advance, and the outer layer of which is made of insulation formwork superposed with the cement formwork and insulation material. The space between the inner and the outer formwork is filled with concrete. Through the test of static loading in vertical and horizontal ways, bearing capacity, deformation properties, and failure modes of the composite shear wall, and cooperative work performance of the insulated formwork and concrete are studied. The static working performance of the composite shear wall with insulation is compared with that of the composite shear wall without insulation and the traditional shear wall, and some suggestions are put forward. The research results have proved that the sandwich-type composite shear wall with insulation is well-performed, which plays an important role in the future study and application.
Utilization of Pineapple Leaf Fiber as Technical Fibers
Authors: Yahya Siti Asia , Yusof Yusri
Published: December 2013

Nowadays, pineapple leaf fibre (PALF) is getting more attention in research area since its showed the enhanced properties to be utilized in few industries. From the previous studies, it has been proved that, PALF is mechanically sound as a composites reinforcement agent and its showed the good contribution in pulp and papermaking production. Due to its enhanced properties, PALF now is commercialized as an alternative textile fiber. PALF is silky, fine and textile grade. Apart from being used as an alternative fiber for home textile and apparel, PALF meet the basic requirement to be used as technical fibers. Instead of having a good strength, PALF also have a reasonable length as well as can be pliable. All of these are the main principle of rope making fibers hence make PALF have huge potential to be used as rope making fibers. This paper will present the possibility of converting PALF into textile yarns and then into rope yarns for cordage and rope making. The methodology involved is included PALF extraction, PALF spinning, and PALF twisting. Finally, this paper will present the expected approached for the upcoming work area.
Research on Fracture Behavior of a Cr Coating/Original Steel Substrate Material under Thermal Fatigue Loading
Authors: Yang Ban Quan , Chen Guang Nan , Du Jun , Chen Xue Jun , Sun Wei Hai , Chen Hong Qian , Pan Jing Wen , Chen Ying
Published: December 2013

The facture behavior of a chromium (Cr) coating/ original steel substrate material was investigated in this work. The results presented in this work show the crack density of the Cr coating on the substrate increases with the increase of the thermal fatigue times, and the failure process and modes of the Cr coating /original steel substrate system can be described as follows: Firstly, the micro-cracks of the coating grew and interconnected as the thermal fatigue time increased. Secondly, the pocket cracking at the coating and the substrate interface occurred, and the main cracks of the coating formed. Finally, the spallation or (and) collapse of the coating occurred.
Tribological Characteristics of Al 356 Alloy Reinforced with Red Mud
Authors: Geetha Baskaran , Ganeshan K.
Published: December 2013

Recent attention is focused on issues of utilization of industrial wastes. The paper deals with the Tribological characteristics of Al356 alloy reinforced with red mud of different volume fractions. Red mud is a gangue produced during the extraction of alumina, disposal of which has become a major issue. In recent years, the utilization of red mud as a filler material has increased due to its chemical composition, which includes metals like Fe2O3, Al2O3, Na2O and TiO2, etc. These metals exhibit good wear characteristics. The red mud collected from Malco, TamilNadu, India, is preheated in the furnace up to 500o C and 53 micron sized particles are mixed with Al356 alloy. Al MMC disc is manufactured by stir casting technique using Al356 alloy reinforced with different volume percentage (5%, 10%, 15% and 20%) of red mud. Pins of 10 mm diameter are machined from the brake shoe liner of commercial passenger car. The wear tests are then carried out on a pin-on-disc machine.. Wear rate is calculated for different percentage of reinforcement under different test conditions. The wear grooves formed on the Al MMC disc for all percentage of red mud are analyzed using optical micrograph. The results show that applied load and sliding velocity have significant influence on wear rate of composite. The co-efficient of friction decreases when the load increases. Experimental analysis is carried using Taguchis Design of Experiment method with various parameters like sliding velocities, applied load and composite volume fraction to identify the key factors that influence the wear rate. The Taguchi experiments results confirm the actual results obtained from the numerical calculation.
Finite Element Simulation Analysis of Multi-Stands Three-Roller Cold Rolling Process for Double Metal Composite Seamless Steel Tube
Authors: Wang Xian Kang , Ye Jin Duo , Ma Xu , Tian Qian Qian , Li Xue , Bao Yan
Published: December 2013

The numerical simulation of the Y-type three-roller two stands cold rolling stainless steel/carbon steel double metal composite seamless steel tube process was conducted through the finite element analysis of the elastic-plastic by applying the MSC.MARC software. Based on the numerical simulation, the character of stress and strain distribution parameters during the Y-type three-roller two stands cold rolling were obtained by the finite element analysis, and acquired the section pass deformation figure. The distribution of the axial stress, circle stress and radial stress were drawn below the Y-type mill along the circle. The mechanism of the tube cold rolling process and the effect of the forming steel tube both the diameter and wall thickness accuracy were explained according to the stress distribution. The results of the research can be applied to the design of the technical parameters in the forming process.
Numerical Simulation Analysis on Stability of Coal Pillar of Empty Mine Goaf in North of Shanxi Province
Authors: Tang Hao , He Zi Guang , Lian Hai Bo
Published: December 2013

The analysis model of coal pillar of a empty mine goaf in north of Shanxi province was constructed and the process of coal pillar from formation to weathering was simulated through the application of software of FLAC3D in this article. The stressstrain and the law of plasticity transformation of coal pillar from formation to weathering were analyzed and the long-term stability of coal pillar was forecasted. The result showed that the stability of coal pillar was bad for excessive excavated and weathering and the coal pillar will be broken easier for pressure and shear.
Nonlinear Finite Element Analysis for Galloping of Iced Quad-Bundled Conductor
Authors: Qin Li , Li Ya Nan , Wei Xiao Guang
Published: December 2013

Based on the differences aerodynamic characteristics between each sub-conductor of iced bundled conductors, a two-node cable element with three translational and one torsional degrees of freedom at each node is utilized to imitate the bundled conductor and the two-node space beam elements are used to simulated the spacers. Established nonlinear finite element equations of bundled conductors based on the principle of virtual work and solved these equations using Newmark-β method. Numerical example was employed to demonstrate the reliable and efficient of the presented method and program.
Effect of TiB2 on Damping Capacity and Dynamic Young's Modulus of 2219 Alloy
Authors: Chen Dong , Zhou Cong , Li Xian Feng , Zhang Yi Jie , Ma Nai Heng
Published: December 2013

2219 aluminum alloy reinforced with 10wt. % TiB2 particulate was fabricated through mixed-salts method. The damping capacity and dynamic Yongs modulus was investigated. The damping capacity and dynamic Yongs modulus of 10wt. % TiB2/2219 is higher than that of the matrix alloy.The improved damping capacity is due to dislocation damping at low temperature, and grain boundary damping and interface damping at high temperature.
Study on a Structure of 2,6-Pyridine Dicarboxylic Acid Gallium, (NH4)Ga(C7H3NO4)2
Authors: Liu Hai Xing , Liu Qing , Sun Xiao Ri , Wang Lin Tong , Zhang Yun Chen , Ye Kai Qi , Yue Hui Juan
Published: December 2013

A novel Ga complex (NH4)Ga(C7H3NO4)2 has been synthesized from a solution reaction and the crystal structure has been determined by means of single-crystal X-ray diffraction. The Ga atom is six-coordinated by two N atoms and four O atoms from two 2,6-pyridine dicarboxylic acid anions. The crystal packing is stabilized by O-H...N hydrogen bonding interactions.
Study of the Effects of Transient Load on Envelope Structure
Authors: Mynarzova Lucie , Mynarz Miroslav
Published: December 2013

The contribution compares the response of envelope of chosen structure to the effects of transient load. The load was caused by air blast wave due to deflagration of methane-air mixture. The paper deals with interaction of incident blast wave and envelope structure. Considering blast courses obtained from experiments, two simplified models of load were developed. Load, defined by both load functions, was applied to 3D numerical model of the structure. Calculated result values of deflections of wall elements were compared to experimentally obtained deflections.
Study on the Full State Function of Structural Parameters for Materials
Authors: Wei Zhai Hai , Wang Meng Shu , Zhang Ding Li
Published: December 2013

The structural problem of materials, belonging to the field of material mechanics, is one of the most challenging problems for geotechnical materials. The theory of full state function for materials is a feasible method to describe the structural property of materials. Based on the analysis of structural parameters and its number in the geometric - mechanical material model, the concept of full state function for materials was introduced in this study. The full state function of structural parameters for the materials was obtained. It was found that, in the specific material analysis model, the number of the structural parameters of materials was known. The physical meaning of the corresponding material parameters was essentially the reflection of the degree of mutual influence among the directions of the structure of the material. The number of independent structural parameters represented the number of combinations which could produce influence independently among the direction of structured materials. The magnitude of the structural parameter reflected the degree of mutual influence among the structured directions. It could also be thought that the inconsistency of geometric - mechanical properties along the direction of the structured materials was reflected by the number of structural parameters, while the inconsistency degree was reflected by the magnitude of the structural parameters.
Visual Design and Computational Analysis of the Hydraulic Support Based on MATLAB
Authors: Niu Yan Qi , Li Ming Zhong , Ding Fei , Liu Wei
Published: December 2013

In the fully mechanized coalmining face, all the main hydraulic supports have the four-bar connecting rod. The design of the four-link mechanism is an important part of the modern hydraulic support design. This paper has analyzed the hydraulic supports four-bar connecting rod design process according to the deflective mount of the top beam. Simplified support model has written kinematic and mechanical equations of the four-bar type hydraulic support. This paper has proposed a method which can design the four connecting rod of hydraulic support based on matlab and solve nonlinear equations of kinematics, and has compiled into a visual computing program. Gives an example of the design requirements, applying this procedure design and calculation parameters of the hydraulic support, and using the AutoCAD drawing to verify results, calculation results are correct. The program improves efficiency of the hydraulic support design. The application of this procedure can be repeated, variables are modified until getting a satisfactory design results.
A Micro Analysis about the Application Problems of "Six Sigma" in Discrete Military Manufacturing Industry
Authors: Bai Fang , Jin Wen Li , Ji Yun
Published: December 2013

Discrete military manufacturing industry is analyzed about the characteristics of the product design, processing, manufacturing in this paper, it also discusses the application problem of process management in discrete military manufacturing industry,and has a discussion contrapose on the small sample ,discrete data analysis,the multi-target fusion analysis and processing,the qualitative problems processing method,in order to improve the feasibility and adaptability of "six sigma" in discrete military manufacturing industry.
Design on Cleaning Device for Slag of Narrow Gap Submerged Arc Welding
Authors: Zhang Wen Ming , Li Xiao Xu , Wang Bin
Published: December 2013

At present, the Narrow Gap Submerged Arc Welding is an advanced welding technology. As the weld is very deep and narrow, the slag is difficult to clean and will have impact on the quality of welding seam. Therefore, a new kind of narrow gap submerged arc welding slag cleaning device is designed to clean the welding slag. It is consisted of welding walking tractor, height adjuster, slag masher, slag cleaner and slag collector. The narrow gap submerged arc welding slag removal device used for the welding process can realize the cleaning that manpower cannot finish. It is a kind of time-saving, energy-saving and high efficient welding cleaning method.
Evaluation of Roundness Error Based on the Position of the Centers
Authors: Zhao Shi Zhen , Li Xiu Ming
Published: December 2013

This paper presents a simple algorithm for determining the minimum circumscribed circle which can select the control points accurately and efficiently from the entire data set. The first candidate point is selected based on the least square center, and then the second and third candidate points are determined based on the position of the centers. The control points for the minimum circumscribed circle were determined with the three candidate points easily, Extensive examples have been carried out to validate the effectiveness of the proposed algorithm.
Luminescence Mechanism of ZnWO4 Nanopowder Synthesized by Microwave-Assisted Heating
Authors: Tsai Ming Kwen , Lee Yueh Chien , Huang Chia Chih , Hu Sheng Yao , Tiong Kwong Kau , Hong Bo Yao
Published: December 2013

The luminescence investigations on the calcinated zinc tungstate nanopowder (ZnWO4 NP) synthesized by microwave-assisted synthesis are presented using photoluminescence (PL) and time-resolved photoluminescence (TRPL) analyses. The X-ray diffraction (XRD) patterns exhibit that the significant wolframite structure of ZnWO4 NP can be detected at calcination temperatures above 300 °C. The 12 K PL and TRPL results demonstrated that the deformation of WO6 octahedra is responsible for the low-energy side of PL spectra and dominate the red-shifted PL spectra with increasing calcination temperatures.
Simulative and Experimental Study on Electromagnetic Pump Supplying Liquid Alloys during Casting: Modeling and Effects of Design Parameters on Pump Height
Authors: Dong Xi Xi , He Liang Ju , Mi Guang Bao , Li Pei Jie
Published: December 2013

The pump height (ΔH) of liquid A356 alloy by the plane induction electromagnetic pump supplying liquid aluminum alloys during casting was measured, and the experimental values agreed with 3D simulation results. It was found that the relationship between ΔH and frequency was relevant with structural design parameters, and the increase of ΔH versus frequency started to deviate from linearity when the width of the pump ditch (b) was higher than that of the iron core (W). ΔH was found to be always proportional to the square of the current and irrelevant with frequency and structural design parameters. It was also found that ΔH decreased significantly with the magnetic gap and increased with W and the thickness of the iron core, while ΔH was not affected by the polar distance. In addition, ΔH increased first rapidly and later slowly with b till the maximum was reached, after which ΔH started to decrease slowly with b.
Study on Concurrent Maintainability Design Based on Pro/INTRALINK
Authors: Liu Tie Lin , Zhang Cheng
Published: December 2013

In order to make product maintainable, maintainability engineering encourages sufficient focus on product maintenance at early development stage, and systematic maintainability design throughout product development and design. Maintainability and other life cycle aspects should be concurrently design into product. Integrated maintainability information model is established. Based on product assembly information model, the components of integrated maintainability information model, and how to integrate this model with design process model are discussed respectively. With Pro/INTRALINK as product data management platform, an integrated environment which supports concurrent maintainability design and its establishment steps are explored, including configuring basic environment, establishing master information model, defining and managing design flow, which provide and effective methods for concurrent maintainability design.
Aerodynamic Force of a Cantilevered Cylinder in Uniform Flow and Turbulent Boundary Layer
Authors: Wang Qi Wen , Zou Chao , Wang Han Feng
Published: December 2013

The aerodynamic force and pressure distribution on a cantilevered cylinder with aspect ratio of 5 mounted in smooth uniform oncoming flow and turbulent boundary layer have been experimentally investigated. The tested Reynolds number ranges from 0.64×105to 5.81×105, covering subcritical, critical and supercritical regimes. The results indicate that the aerodynamic drag of a cantilevered cylinder is smaller that that of 2D cylinder. The drag differs significantly along cylinder span because of the three dimensionality of the flow. The presence of turbulent boundary layer makes cylinder back pressure more uniform along cylinder span relative to that in uniform flow. Transition from subcritical to critical regime occurs earlier near cylinder free end in uniform flow, while this behavior disappears with the presence of turbulent boundary layer.
Experimental Investigation of Influence of Normal Pressure on Rotational Friction Behavior
Authors: Park Jin Young , Han Sang Whan , Moon Ki Hoon , Lee Kang Seok , Kim Hyung Joon
Published: December 2013

From various previousexperimental researches, the stable hysteresis of brake liningpads-to-stainless steel sheet friction interfaces has been verified.However, most of previous researches concentrated on the linear frictionbehavior of the brake lining pads-to-stainless steel sheet interfaces andresearches on rotational friction behavior are very limited. Therefore, thisstudy experimentally investigates the rotational friction behavior of theinterfaces and the influence of normal pressure applied by torque ofhigh-strength bolts. Cyclic loading tests were carried out with changing normalpressures.
Numerical Investigation of Static Strength for Tubular Joints Reinforced by Inner Plate
Authors: Yang Dong Ping , Shao Yong Bo , Long Feng Le , Niu Geng Qi , Zhang Lu , Zhi Jing Bo
Published: December 2013

Welded tubular joints are widely used in long-span, space and offshore structures. In a welded tubular joint, the chord is generally subjected to loads in radius direction which are transmitted from the brace members in axial direction. As the strength of the chord in radius direction is generally much weaker than that of the brace in axial direction, failure occurs easily at the weld toe on the chord surface. To improve the bearing capacity of the joint structure, reinforcement is necessary. Several reinforcing methods were reported in the literature, such as doubler or collar plate reinforcement, internal stiffened ring reinforcement and bracket reinforcement etc. This paper presents the strengthening method by inner plate. From finite element analysis of many inner plated reinforced tubular joint models, the efficiency of reinforcement by inner plate is analyzed by comparing the static strength of reinforced models with that of unreinforced models. Based on a parametric study of the static strength of tubular joints reinforced by inner plate, the design considerations on inner plate strengthening tubular joints are also proposed.
A Algorithm of Path Planning Based on Multiple Mobile Robots
Authors: Tan Xiao Dong , Wang Xu , Song Pi Wei
Published: December 2013

The environment of automated warehouse is complex. Path collision exists conflict between intelligent robot with unknown obstacles and intelligent mobile-robot, increasing the difficulty in multiple mobile robots path planning.To solve the problem, firstly working environmental model is established with traffic rules method and the grid method. Then the whole system adopts the idea of hierarchical cooperation for dynamic local and global path planning.By simulation this method is suitable for dynamic environment with known and unknown obstacles and effectively solve the problem of path planning for multiple mobile robots in automated warehouse.
Fiber-Optic Extrinsic Fabry-Perot Interferometer Sensors with Multi-Wavelength Intensity Demodulation
Authors: Song Ning Fang , Cui Rui Qi , Yang Yu Jie , Xu Xiao Liang
Published: December 2013

In this paper, a novel method used for Fabry-Perot cavity length's demodulation in high-speed and large scope measurement was proposed. Principle of the method is based on uniqueness of intensity of multiple wavelengths in the scope of Fabry-Perot vibration. This technique offers flexibility of selecting incident wave length and enhances the scope of demodulation of cavity length, compared with that popular triple wave length demodulation. In experiment, multi-wavelength demodulation is demonstrated for measurement of cavity length varying from 110um to 115um and the strain resolution was higher than 0.1um.
Forward Kinematics of Parallel Robot Based on Neuro-Fuzzy System
Authors: Wu Xiang , Zhou Zu De , Ai Qing Song , Meng Wei
Published: December 2013

As the structure of parallel robot is special in general mechanical and electrical systems, its forward kinematics needs to be solved by nonlinear equations. In this paper, for the issue that numerical iterative method requires complex mathematical derivation and programming, and is sensitive to the initial value, a Neuro-fuzzy system is proposed for solving forward kinematics model of parallel robot. Meanwhile, inverse kinematics is used for training database, knowledge representation ability of fuzzy theory and self-learning ability of neural network are combined to overcome the shortcomings that neural network cannot express human language and fuzzy system do not have self-learning ability. In addition, training and generation efficiency of the model can also be improved by reducing the input dimension reasonably. Simulation results have been showed that, in the premise of efficiency, accuracy of forward kinematics model using Neuro-fuzzy system is better than Newton-Raphson iterative method, and has better versatility.
Improvement of Production Index for Cell Production by Mobile Robots
Authors: Matsuda Keishi
Published: December 2013

These days, research of multiple robots, which has distributed function and maximize their total ability have been frequently observed in the field of rescue robots or soccer robots tournament called ROBOCUP[- [. This shows the rapidly growing need of more sophisticated multiple robots which are more dependable compared to function-integrated single robot.
Time Optimal Path Planning of Palletizing Robot
Authors: Xu Yong Pan , Hong Ying
Published: December 2013

In order to improve the efficiency and reduce the vibration of Palletizing Robot, a new optimal trajectory planning algorithm is proposed. This algorithm is applied to the trajectory planning of Palletizing manipulators. The S-shape acceleration and deceleration curve is adopted to interpolate joint position sequences. Considering constraints of joint velocities, accelerations and jerks, the traveling time of the manipulator is minimized. The joint interpolation confined by deviation is used to approximate the straight path, and the deviation is decreased significantly by adding only small number of knots. Traveling time is solved by using quintic polynomial programming strategy between the knots, and then time-jerk optimal trajectories which satisfy constraints are planned. The results show that the method can avoid the problem of manipulator singular points and improve the palletize efficiency.
Study on RBF Neural Network PID Control for Hydro-Viscous Drive System
Authors: Meng Qing Rui , Wang Kai , Wang Dao Ming , Wang Jian , Song Bao Cheng , Luo Cheng Ming , Jiang Hong Xiang , Yuan Bo Yu
Published: December 2013

To verify the applicability of RBF neural network PID control on speed regulating start control for hydro-viscous drive system, analyze the principle of RBF neural network PID control, the simulation model is established based on SIMULINK and the control characteristics are analyzed based on the AMESim/MATLAB co-simulation. The results show that RBF neural network PID control has a good self-correcting effect on speed regulating start of hydro-viscous; it can make right judgments according to the error and error rate and adjust the output speed towards opposite direction of error; meanwhile, it ensures the smoothness of output curve and avoids excessive mechanical impact. The results play a guiding role for control strategy selection of speed regulating start.
A Study on Wear Properties of GCV Material with DLC Coating
Authors: Nam Ki Woo , Lee Soo Chul
Published: December 2013

Compacted vermicular (CV) graphitization cast iron is the name given to graphitization cast iron where the shape of the graphite looks like a vermicular. Castability and the thermal conductivity of CV graphitization cast iron is similar to those of Grey iron, while the strength of CV graphitization cast iron is similar to that of ductile iron. The thin film of diamond-like carbon (DLC) is one of the amorphous carbon thin films. It has various characteristics which are similar to those of diamond, such as high hardness, lubricity, abrasion resistance, chemical stability, electrical insulating properties and optical transparency. In this study, wear characteristics of Graphite Compacted Vermicular (GCV) material were investigated in accordance with changes in DLC coating time. The obtained results are as follows: the microstructure of GCV340 showed complex tissue with eccentric graphite and spherical graphite. The friction coefficient shows under 0.2 in all specimens. After enduring the wear test until 2000 m, the coating layer of the DLC coating specimen of 90 minute hardly showed any damage. It had only partial damage after taking the wear test until 2000 m. The friction coefficient was also the lowest.
Vibration Measurements of Steel Foot-Bridges Using Mobile-Phone
Authors: Yoon Sung Won , Do Ki Young , Ryu Jae Ho , Ju Young Kyu
Published: December 2013

The design of foot-bridge is often influenced by natural frequency. Consequently, vibration frequency becomes important. The empirical expressions used to quantify this parameter at the design phase have not been developed enough to give guideline to Korea foot-bridge. This paper is concerned with the frequency of steel foot-bridges. It describes the vibration measurement methods employed for testing structures and presents reliable methods of assessing natural frequency from jumping vibration tests. Data from measurements on 30 structures in Seoul are given. Regression formulas of natural frequency for steel-framed foot-bridges are suggested. Finally, obtained formula is compared with empirical expressions of Seoul Citys guideline and Bachmanns curve.
Mechanical Properties of Fiber Reinforced Self-Compacting Concrete
Authors: Long Wu Jian , Lin Han Xin , Chen Zhen Rong , Zhang Kai Long , Wang Wei Lun
Published: December 2013

The mechanical strengths of self-compacting concrete (SCC) with different strengths and different fibers were investigated. By mechanics performance testing on concrete samples, it shows that the fiber can significantly reduce strength of the self-compacting concrete during curing period. The 28d tensile strength of self-compacting concrete can be improved when steel fiber, polypropylene fiber, or polyethylene fiber were used. Moreover, steel fiber can improve the 28d compressive strength; contrarily, polypropylene fiber and polyethylene fiber can reduce the 28d compressive strength.
Separation Test of Oxide Copper Ore in Yunnan
Authors: Ran Jin Cheng , Liu Quan Jun , Zhang Zhi Guo
Published: December 2013

A task of a refractory oxide copper ore in Yunnan has been studied, the grade of copper is 2.76% in crude ore. This ore has high oxidation and deep combination, the oxidation ratio is 42.32% and the combination ratio is 33.01%, so it is difficult oxide copper. Because the sulfide copper in crude ore containing 21.27%, so by experimental research, we decided to adopt the process of floating copper sulfides, and then sulfide oxide copper. In the flotation of oxidized copper minerals, we take the process of desliming, the copper minerals have recycled efficiently, while making a small precious metal--silver has been associated enrichment. Through closed-circuit test, we obtained the final concentrate, which the grade of copper is 20.38%, the recovery of copper is 65.44% and the grade of silver is 80.15g/t.
Research on the Mechanical Properties and Micro-Morphology of the Cement Stabilized Gravel with Rubber Particles
Authors: Yang Ruo Chong , Li Kai , Zhu Ji Peng , Zhu Teng Kuo , Zhu Hong Lei , Han He Jie
Published: December 2013

The primary objective of this paper was to study the mechanical properties of the cement stabilized gravel by different compact method which added rubber particles by using macroscopic and microscopic test. Through test of compression, relationships of mechanical properties of samples were studied. Pore structure and fractal characteristic of mixture was analyzed quantitatively using mercury intrusion porosimetry (MIP), scanning electron microscope (SEM) was applied to analyze the micro-morphology of samples. The tests results showed that the compressive strength of samples which prepared by using vibrating method was greater than that by static pressure method. Compressive strength of samples from vibrating method or static pressure method decreased with the rubber particles volume fraction increase. MIP tests showed that the mean pore diameter and porosity of mixture increased from about 70nm to 250nm and 9% to 24% with the rubber particles content increasing, respectively. SEM tests showed that the interface bonding between sand and hardened cement paste was better than that of between rubber particles and hardened cement paste.
Structural Formability of ABO3-Type Perovskite Compounds: Bond Valence Analysis
Authors: Zhang Huan , Zhang Xu , Ma Jun Guo
Published: December 2013

On the basis of a total of 382 ABO3-type compounds, the structural formability of ABO3-type perovskite compounds is investigated by using the bond valence model method. A new two-dimensional structural map approach for predicting the formability of ABO3-type perovskite compounds that relies on the ideal bond distances with the combination of bond valence parameter, coordination number and oxidation state is proposed. The sample points representing compounds of forming perovskite and non-perovskite are distributed in distinctively different regions. Some misclassified compounds are analyzed and some new compounds are tested within the new structure map. The developed approach can be used to search for new perovskite and perovskite-related compounds by screening all possible elemental combinations.
The Performance Evaluation of New Low Temperature early Strength Agent ZL-1
Authors: Wang Ji Gang , Tong An Qi , Fan Zhen Zhong , Liu Qing Wang
Published: December 2013

Low temperature early strength cement slurry is a slurry in order to meet the well cementation in low-temperature conditions. Daqing weather is characterized by the silica fume, solid alcohols, amines and anionic polymers prepared a certain proportion, got a new low temperature early strength agent, It can greatly accelerate the hydration rate of cement and promote the formation of the cement paste early strength; and no chlorine ions, able to overcome the problem caused by traditional chlorine early strength agent casing corrosion.