bluuebunny/crossref_metadata_2025 huggingface dataset:
Significance of Metadata
Authors: Badhusha K. Nazeer
Published: November 2012

Metadata is structured data that describes the characteristics of a resource. It shares many similar characteristics to the cataloguing that takes place in libraries, museums, and archives. The term “meta” derives from the Greek word denoting a nature of a higher order or more fundamental kind. A metadata record consists of a number of predefined elements representing specific attributes of a resource, and each element can have one or more values. The emerging trend of ICT has actively engaged the metadata harvesting protocol of the open archives initiative. The metadata harvesting initiative targets information generally inaccessible through standard browser searches, such as information stored in databases or within library online public access catalogs. The authors present this topic as an information technology-based initiative with the potential to provide information about the usefulness of metadata: in particular the Dublin Core metadata standard, but also other metadata standards, as the protocol design supports community-specific schemas as well. This represents the developers, commercial information providers, funders, and members of the scholarly publishing community. Along with the interests and concerns of each of these stakeholders and about specific applications of the protocol, the authors identify potential questions that will ultimately need to be addressed.
Impact of ICT on the Changing Roles of the Librarian, Other Library and Information Science (LIS) Professionals, and Managerial Change
Authors: Kamila Kanchan
Published: November 2012

Fast-paced change in technology, particularly the origin of ICT and social, political, economical change forced to managerial change in Libraries and Information Centres (LICs) is necessary for LICs to survive in the twenty-first century. In this context, managerial change towards structure, technology, task, people, library policies, objectives, and functions of information systems and processes of managerial change in LICs are discussed, and the chapter concludes that “Change Management” is the only feasible solution to overcome all the difficulties and problems created in the ever-changing environment for the overall development and progress of LICs in the ICT era.
Learning in Networks of SMEs
Authors: Morandi Valentina , Sgobbi Francesca
Published: November 2012

This paper contributes to the debate on the participation of SMEs in voluntary business networks by framing the relationship between the different types of network-based learning. Learning about networking, which concerns the capability to set, manage, and terminate a strategic alliance, is opposed to learning by networking, which involves the sharing and the joint creation of technical knowledge. The proposed framework is tested in the case of a network of Italian SMEs in the ICT sector. Empirical evidence confirms that learning about networking enables learning by networking and helps to balance those tensions and conflicts that inevitably mark the existence of inter-firm networks. Learning about alliance management provides networked IT entrepreneurs with the capabilities to compete against larger competitors. As learning paths also drive the evolution of inter-firm alliances, networked entrepreneurs would benefit from choosing collective goals in line with their alliance management capabilities.
A Framework for the Quality Evaluation of MDWE Methodologies and Information Technology Infrastructures
Authors: Domínguez-Mayo Francisco José , Escalona María José , Mejías Manuel , Ramos Isabel , Fernández Luis
Published: November 2012

Diverse development web methodologies currently exist in the field of Model-Driven Web Engineering (MDWE), each of which covers different Levels of Abstraction on Model-Driven Architecture (MDA): Computation Independent Model (CIM), Platform Independent Model (PIM), Platform Specific Model (PSM), and Code. Given the high number of methodologies available, it has become necessary to define objective evaluation tools to enable development teams to improve their methodological environment and help designers of web methodologies design new effective and efficient tools, processes and techniques. Since proposals are constantly evolving, the need may arise not only to evaluate the quality but also to find out how it can be improved. This paper presents an approach named QuEF (Quality Evaluation Framework) oriented towards evaluating, through objectives measures, the quality of information technology infrastructure, mainly in MDWE methodology environments.
Success Factors and Motivators in SPI
Authors: Munk-Madsen Andreas , Nielsen Peter Axel
Published: November 2012

The authors report in this article from a survey of medium-sized and large software companies in Denmark where major variations were found in the practice of software process improvement (SPI). Many software companies intend to do SPI; but few companies invest the necessary effort in improvement, and few perform maturity assessments. In general, across the surveyed companies, the effects of SPI are very limited. The study also found that internal motivators are more frequent than external motivators. This article presents and discusses the survey and the results. It also discusses implications for IT organizations and professionals and recommends: (1) assessing the maturity level; (2) allocating sufficient resources to SPI; and (3) creating a positive feedback loop between SPI benefits and SPI efforts.
A Review of Service Frameworks Analyzing Strategic Repositioning
Authors: Tinnilä Markku
Published: November 2012

In manufacturing operations it is important to recognise the capabilities of the firm and established ways to position the current and expected manufacturing capabilities. The most recognised tool is the Product-Process matrix of Hayes and Wheelwright. Similarly, in service business there is a growing need to position the capabilities of firms. Many tools analysing services have also been proposed, but no generally accepted framework has so far emerged as a basis for service classification and strategic service positioning. This paper focuses on strategic positioning of services with special focus on analyzing and measuring the repositioning of services. Banking services are used as the main example, which have been analyzed in several studies of service repositioning. The author reviews the service classifications proposed and the dimensions used. Strategic repositioning and its dimensions are illustrated in banking services, and some trends in services are recognized and discussed. Some elements of a more generic service positioning framework are presented for the purpose of summarizing and consolidating the findings of reviewed frameworks.
Effects of Adaptivity and Other External Variables on Mobile Service Adoption
Authors: Polat Ebru , Basoglu Nuri , Daim Tugrul
Published: November 2012

User Interfaces act as the interaction layer between human and computer and have an important role in system adoption. According to technology acceptance model, acceptance of a system is explained as a function of perceived usefulness and perceived ease of use. Since there are several external variables that have an impact on those variables, the content and interface design of every single application should be addressed specifically to enhance users’ intention to use the system. Adding adaptive features into systems may be one of the approaches to address this phenomenon. This paper identifies external variables including adaptive behavior impacting acceptance of a mobile reservation system through implementation of two prototypes.
A Strategic Benchmarking Process for Identifying the Best Practice Collaborative Electronic Government Architecture
Authors: Zandi Faramak , Tavana Madjid
Published: November 2012

The rapid growth of the Internet has given rise to electronic government (e-government) which enhances communication, coordination, and collaboration between government, business partners, and citizens. An increasing number of national, state, and local government agencies are realizing the benefits of e-government. The transformation of policies, procedures, and people, which is the essence of e-government, cannot happen by accident. An e-government architecture is needed to structure the system, its functions, its processes, and the environment within which it will live. When confronted by the range of e-government architectures, government agencies struggle to identify the one most appropriate to their needs. This paper proposes a novel strategic benchmarking process utilizing the simple additive weighting method (SAW), real options analysis (ROA), and fuzzy sets to benchmark the best practice collaborative e-government architectures based on three perspectives: Government-to-Citizen (G2C), Government-to-Business (G2B), and Government-to-Government (G2G). The contribution of the proposed method is fourfold: (1) it addresses the gaps in the e-government literature on the effective and efficient assessment of the e-government architectures; (2) it provides a comprehensive and systematic framework that combines ROA with SAW; (3) it considers fuzzy logic and fuzzy sets to represent ambiguous, uncertain or imprecise information; and (4) it is applicable to international, national, Regional, state/provincial, and local e-government levels.
The Development of Parameters and Warning Algorithms for an Intersection Bus-Pedestrian Collision Warning System
Authors: Chang Chien-Yen , Chang Ting-Wei
Published: November 2012

This study presents the conceptual design of an intersection bus-pedestrian collision warning system for bus drivers approaching an intersection. The basic parameters of the proposed design concept include the bus drivers’ perception-reaction time, the emergency deceleration rate of the bus, and pedestrian walking speed. A bus driving simulation was designed and conducted to analyze bus drivers’ responses to unexpected pedestrians crossing unsignalized intersections or signalized intersections during a green light interval for parameter analysis. The timings of auditory warnings and visual warnings, the locations for vehicle detectors and pedestrian detectors, and the locations for visual warning devices were also developed after analyzing the experimental results. The experimental results also highlight some important characteristics of bus driving behavior at intersections. Moreover, bus drivers really pay attention to the warning messages. Finally, this study develops and discusses some warning algorithms.
Modeling Control Flow in WS-BPEL with Chu Spaces
Authors: Du Xutao , Xing Chunxiao , Zhou Lizhu , Han Ke
Published: November 2012

This paper presents a Chu spaces semantics of typical control flow of WS-BPEL including fault handling and link semantics. BPEL-CF is proposed as a simplification of this subset of WS-BPEL. For the compositional modeling of BPEL, the authors present a Chu spaces process algebra. This algebra allows faults to be thrown at any point of execution and take link-based synchronization into consideration. The paper gives the abstract syntax of BPEL-CF, the semantic algebra, and the valuation functions for computing the Chu spaces denotations of BPEL-CF programs.
Optimal Compensation for Hierarchical Web Services Compositions under Restricted Visibility
Authors: Biswas Debmalya , Vidyasankar Krishnamurthy
Published: November 2012

Over the years, the notion of transactions has become synonymous with providing fault-tolerance, reliability and robustness to database systems. To extend the same transactional guarantees to new and evolving paradigms, such as Web service, the transactional mechanisms must first be adapted to the distinguishing characteristics of Web services, mainly composability, long-running nature, and privacy and security concerns. Composability refers to the ability to form new composite services by combining the functionalities of existing services. Due to their long-running nature, compensation based mechanisms are usually preferred to provide transactional guarantees for Web services. Compensation requires access (visibility) over the execution details of the services in the composition. However, such visibility may not always be feasible in a compositional context where component services are provided by different providers across organizational boundaries, with very strong privacy and security constraints. This paper looks at compensation options for Web services in a hierarchical composition. Multiple compensation options may be available for a composite service both at the same level and at different levels of the hierarchy. This paper shows how to find an optimal compensation option under restricted visibility.
Service Platform Development
Authors: Daim Tugrul , Brand Marius , Lin Linda
Published: November 2012

Platform concepts have been around for about a decade now. While their focus was on the manufacturing industry in the beginnings, interest has shifted to services – and Internet-based services in particular. This paper provides an overview of popular product platform concepts, a new view upon services in the light of the Internet, and links platforms to Internet-based services. Two companies with a tremendous platform potential, Google and EBay, are introduced and analyzed with respect to their usage of the product platform concept. After a brief discussion of the results, two product offerings of both Google and EBay are compared to give a practical example.
Australia-China and Stern Hu
Authors: Mascitelli Bruno , Chung Mona
Published: November 2012

China’s economic growth over the last decade has been spectacular and Australia has been a beneficiary of this growth in terms of China’s demand for resources and the strength of Chinese exports. Pundits even suggest that Australia avoided the global recession as a result of this strong trade relationship. Trade relations between Australia and China resulted in China becoming Australia’s key trading partner. The arrest and charging in 2009/10 of four Rio Tinto executives (including Stern Hu the head of Rio’s operation in China) based in China raised fears of posing a strain on this vital economic relationship. Moreover China’s inability to takeover Rio Tinto and the significance and consequences of this incident are at the core of this paper. How do these events reflect the uncertainties of doing business in China or do these events demonstrate China’s sovereign right to enforce anti-corruption legislation? While China has embraced the international business community, to what extent has the arrest and imprisonment of Stern Hu changed the Australian-China trade relations including doing business in this thriving and buoyant market?
Social Loafing in Distributed Organization
Authors: Zhang Xi
Published: November 2012

This study investigates how social loafing indirectly influences the knowledge sharing behavior in the context of IT-enabled distributed organization. In this high social loafing environment, we found the individual favor benefits may negatively moderate the relationship between economic and social strategies and knowledge contribution. This study provides some suggestions for the management of virtual organizations in supporting strategies design, knowledge contribution encouragement and member selection.
Evaluating and Funding the Professional Development Program
Authors: Mark Christine L.
Published: November 2012

Professional development programs must have an organized process of evaluation, either formally or informally. The evaluation needs to be delivered in both micro and macro settings. In the micro setting, the evaluator monitors the overall atmosphere of the learning environment and the performance of the participants while training is taking place. In the macro setting, which consists of the teacher’s classroom, the evaluation needs to determine whether the teacher is actually using the knowledge gained during professional development to improve /impact student learning outcomes. In order for professional development to be effective, professional development programs should never be delivered and then forgotten. Further, locating funding and support are important due to the state of economic crisis and budget cuts. School districts have to look for creative ways to fund and support successful professional development programs. Some of these include developing technology resource centers, looking for federal and state funds, and looking toward individuals and corporations to help support and fund programs.
Leadership Issues Concerning Instructional Technology
Authors: Cui Guoqiang , Vowell Rebecca
Published: November 2012

The exponential development of technology has brought people boundless possibilities. But, at the same time, technology also imposes great pressure on people because they need to learn and remain updated about the various technologies in their lives. The field of instructional technology has always been exceptionally thrilled about novel technologies or the innovative use of traditional technologies. This enthusiasm places leaders of instructional technology in a very challenging position. Besides dealing with regular leadership issues, technology leaders also need to face technology-related roadblocks and issues. In this chapter, both general and technological issues of instructional technology leadership are introduced. Following these issues, the authors of this chapter also discuss strategies for dealing with these issues and offer suggestions for effective instructional technology leadership.
Bridging Boundaries
Authors: Wilhelmson Lena , Johansson Peter , Döös Marianne
Published: November 2012

The aim of this chapter is to describe interventions that middle managers make when they strive, as technology leaders, to bridge intra-organizational boundaries in order to support new agile ways of working. Another aim is to discuss how these interventions may be understood as pedagogic interventions. By using qualitative methods in a case study approach concerning the software communication industry, the findings reveal interventions that focused on alignment through collaboration, interdependency, flexibility, and communication. These kinds of interventions are regarded here as an example of pedagogic managerial leadership. Managers take on development and learning as main collective work tasks because they want to influence knowledge creation and are aware of the learning dimension of their work tasks.
Ethical Challenges for User-Generated Content Publishing
Authors: Sözeri Ceren
Published: November 2012

Mainstream online media is gradually encouraging user contributions to boost brand loyalty and to attract new users; however, former “passive” audience members who become users are not able to become true participants in the process of online content production. The adoption of user-generated content in media content results in new legal and ethical challenges within online media organizations. To deal with these challenges, media companies have restricted users through adhesion contracts and editorial strictures unlike anything encountered in the users’ past media consumption experiences. However, these contractual precautions are targeted to protect the media organizations’ editorial purposes or reputations rather than to engage ethical issues that can also ensure them credibility. It is expected that some public service media strive to play a vital role in deliberative culture; on the other hand, some commercial global media have noticed the importance of worthwhile user-generated content even though all of them are far from “read-write” media providers due to the lack of an established guiding ethos for publishing user-generated content.
Business Intelligence Tools for Social e-Enterprises
Authors: Bernardino Jorge
Published: November 2012

Social enterprises can tackle a wide range of social and environmental issues and contribute to economic growth but they also benefit people and the planet. However, social enterprises face particular difficulties, in order to be financial sustainable and get their social mission accomplished in a global world. In recent time, technology applications in different fields, especially Business Intelligence (BI), have been developed rapidly and considered to be one of the most significant uses of information technology. BI is a broad category of applications and technologies for gathering, storing, analyzing, and providing access to data to help enterprise users make better business decisions. This represents a tremendous competitive advantage that allows achieving and exploring the collective intelligence of the organization, enabling contextual, agile, and simplified information exchange and collaboration among distributed stakeholders and networks of partners. Despite these advantages, the organizations applying such systems may also encounter problems in decision-making process because of the highly diversified interactions within the systems. Hence, the choice of a suitable BI platform for social enterprises is important to take the great advantage of using information technology in all organizational fields. This chapter aims at addressing the problems existed in the social e-enterprises, describing and evaluating the major open source BI tools that can have strong impact on social enterprise change and development.
ANOBIUM, SL
Authors: Díaz-Foncea Millán , Marcuello Carmen
Published: November 2012

The chapter presents the experience of the company Innovation in Information and Documentation Systems Ltd. (ANOBIUM). It is a nonprofit Special Employment Centre focused on the social integration through employment of physical, sensory, intellectual, and mentally disabled persons. Its activity is based on Information and Communication Technology (ICT), offering services such as the digitization, the destruction or the custody of documents, the dynamization of website and website positioning in search engines, as well as the consulting in both fields the documental archives, and the production and the spreading of analyses in specific fields as CSR and business policies for work integration. The ANOBIUM case shows that ICT can be used as a niche of employment in order to develop the activity of Social Enterprises, and that ICT incorporates multiple benefits that can be used to achieve the social objective pursued by Social Enterprises. Also, ANOBIUM uses ICT to increase the impact and the spreading of the activities of other Social Enterprises.
Research on Mechanical Wind Machine of Constant Velocity
Authors: Ding Ming Cheng , Ding Xue , Zhang Li
Published: November 2012

Primary technical parameters of centrifugal style speed controller were determined by Routh-Hurwitz criterion; the section gear variator could reach the standard of common gear driving of 9 grade precision indicators through design and calibration, especially suitable for low-rotate speed condition. The mechanical wind machine of constant velocity is novel in mode, briefness in structure, low in making cost and good for spreading and using.
Applied Mechanics-Based Devices in Mobile Human-Computer Interaction
Authors: Chang Yan Shuo , Hua Qing Yi
Published: November 2012

To provide some suggestions of hardware specifications to relevant people, such as developers and researchers, this paper proposes a “standard” smart phone by using the revised value of parameters, like mean and mode, which are based on the analysis of smart phone hardware parameter information database. It provides a good reference for the human-computer interaction designers at both the qualitative and quantitative level.
Application of Fracture Prediction and Modeling Technology in Tight Sandstone Gas Reservoir in Xinchang Gas Field of Sichuan Basin
Authors: Qu Liang Chao , Bian Chang Rong
Published: November 2012

To adopt new generation global optimization discrete scanning technology in 3D space, the seismic event occurrence can be scanned accurately. By means of anslysing the relationship between fracture density of wells and seismic geometry attributes scanned precisely, it is concluded that pixel imaging attribute is effective to predict large scale fracture and curvature for small scale fracture. Based on fracture analysis, making use of lithology and curvature as constraints and starting from the well data, the density of the large scale fracture with seismic level and small scale net fracture can be predicted. According to the structure and production condition of wells, the area with fractures developed and in structural high is the advantageous area for exploration and development.
Study on Organic Montmorillonite Modified Recycled Optical-Grade Polycarbonate Nanocomposite
Authors: Guo Fu Quan , Li Ying Ying , Guo Bin , Liang Hao
Published: November 2012

Optical–grade polycarbonate (PC) was separated from optical disks by a chemical approach and used to prepare nanocomposite to make full use of the wasted polymers. A quaternary ammonium-modified montmorillonite (organic montmorillonite, OMMT) was chosen as a modifier and an auxiliary functional resin (CBT160) was utilized to exfoliate the layers of montmorillonite. The characterization results of X-ray diffraction (XRD) and transmission electron microscopy (TEM) for PC/ OMMT (5wt %) revealed that an exfoliation structure of the nanocomposite was obtained. The mechanical measurements show a great increase in tensile strength and Izod impact strength of PC/ OMMT nanocomposite compared with the recycled optical–grade PC.
The Design and Preparation Process of Aluminum Silicate Fiber Paperboard Machine
Authors: Zhao Chuan Shan , Han Wen Jia , Yu Dong Mei , Pang Jin Jiang
Published: November 2012

In this paper，we designed a new kind of aluminum silicate fiber paperboard machine basing on the characteristic of aluminum silicate fiber and papermaking technology while some related process was studied in this paper. The aluminosilicate fiber board was prepared by the process of wet forming vacuum filter and microwave drying. The well strength performance was obtained by adding the high temperature resistant inorganic and organic adhesives. Considering these properties, we designed the aluminum silicate fiber paperboard machine with the pulp consistency of 1～2%, the paper machine speed of 1.5m/min, the width of 2m, the apparent density of 200～350Kg/m3 and the thickness of 20mm～50mm. The insulation board can be resistant up to 1200°C.
Diagnostic Strategy Optimization Based on Particle Swarm Algorithm
Authors: Zhang Yan Sheng , Qiao Zhong Tao , Jing Jian Hui
Published: November 2012

Fault diagnostic strategy profoundly influences diagnostic efficiency and cost. Diagnostic strategy optimization is a Non-Polynomial optimizing problem, which is a hard one. Applying conventional methods to resolving it, there are some difficulties: more complex to implementing algorithm, more time to diagnosing and more difficult to attaining global optimum. Particle swarm algorithm (PSA) is a new intelligent optimization algorithm, and applied to optimizing diagnostic strategy. Function of all-in cost is constructed by state probability, isolating matrix and test cost, serving as objective function. Test sequences are directly put into particle codes. Particle speeds are transformed to learning probability towards the best one in the swarm. Given proper parameters in PSA, the method can search the global optimum in a little time. At last, an example shows the approach is feasible and effective.
Rapid Prototyping Design of 3D Models by Reverse Engineering
Authors: Wang Dong Sheng , Wang Xin Feng
Published: November 2012

The digital measurements of the back cover of a telephone receiver were carried out by a three dimensional measuring machine and the data point clouds of the contours were got. Using reverse engineering software, Imageware, the data point clouds were processed, including of data smoothing, data reducing, data point clouds resample, feature lines extracting and curve fitting. Based on the shape features of the research object, the 3D model of the back cover of the telephone receiver were reconstructed with the boundary curves and the scanning data point groups successfully. Precision evaluation was carried out to the 3D model and the error controlled within 0.2mm.
Vibration Analysis of Needle-Punching Machine Slider-Crank Mechanism
Authors: Xie Jun Hui , Yuan Jian Chang
Published: November 2012

After analysis of the movement characteristics of needle-punching machine slider-crank mechanism in theory, a slider-crank mechanism acceleration curve had been rendered by MATLAB software and acceleration movement curve had been drawn after the measurement of acceleration of slider-crank mechanism by ADAMS simulation software. Through the comparison between the two results, a conclusion had been drawn. Finally, 3 advice of minishing vibration had been given according to the conclusion of calculation of acceleration by Quality Substitution Method,the first advice is the quality and site of the balance block are chose appropriately,the second advice is the weight of the slider and the connecting rod need to be reduced by choosing appropriate material.
Research on the Influence of N2 Partial Pressure on the Performance of Ti/Al/N Composite Film
Authors: Zhang Hui Xia , Zhan Hong Wei
Published: November 2012

After ion nitriding, prepare composite film on surface coating processing by multi-arc ion plating. Experimentally analyses the properties of surface pattern, adhesion strength and vickers hardness in different nitrogen partial pressure. It is found that an optimum value is existed in the nitrogen partial pressure parameter designing range for obtaining optimal performance of TiAlN composite film.
The Analysis of a Frame Structure with Additional Shear-Bending Bars under Horizontal Earthquake Action
Authors: Wang Zhong Xin
Published: November 2012

The analytical result of the model under horizontal earthquake action is discussed in this paper, According to the analysis, this structure can effectively reduce stress and deformation. The structural potential behavior and failure principle are presented. Some advices are given in this paper for deeply studying such frame structures.
The Research of the Bending Crack Resistance Ability of Reinforced Concrete Beam Mixed with Emulsified Asphalt
Authors: Ning Bao Kuan , Liu Guo Qing , Ren Yi Nan , Xu Feng Lin
Published: November 2012

By four-point bending tests on the reinforced concrete beams with emulsified asphalt of different parameters, cracks, deformation and bearing capacity were observed and recorded during destructive process, and then a comparison were made between the experiment results and those of ordinary reinforced concrete beams. The results prove that lower emulsified asphalt dosage (1% to 3%) can significantly improve the overall deformation of reinforced concrete beams; while higher asphalt emulsion parameters (5% to 7%) reduce the beam intensity and do not improve the toughness and overall deformation capacity.
Visible Light Photocatalytic Degradation of Reactive Deep Blue K-R by BiOI and BiOCl0.2Br0.1I0.7
Authors: Huang Kai Jin , Nie Yu Yao , Liu Yun
Published: November 2012

The visible-light photocatalytic degradation of an azo dye Reactive Deep Blue K-R by BiOI and BiOCl0.2Br0.1I0.7 photocatalysts was investigated. When the reaction proceeded for 1 h under the conditions of 15mg/l Reactive Deep Blue K-R solution and PH=3, the visible-light degradation degrees of Reactive Deep Blue K-R were 93% and 52% for BiOCl0.2Br0.1I0.7 and BiOI, respectively.Moreover, the photodegradation of Reactive Deep Blue K-R by BiOI and BiOCl0.2Br0.1I0.7 followed a first-order reaction kinetic and the values of k for BiOI and BiOCl0.2Br0.1I0.7 are 0.911h-1 and 1.981h-1, respectively. BiOCl0.2Br0.1I0.7 exhibits better visible-light-responsive photocatalytic performance for photodegradation of Reactive Deep Blue K-R than BiOI due to the smaller particle size, the larger specific surface area and the stronger redox potential of BiOCl0.2Br0.1I0.7.
Synthesize Boron Doped Diamond Films on Porous Ti Substrates by DC-PCVD
Authors: Yin Long Cheng , Zhao Lin Xin , Zheng You Jin , Zuo Gui Hong , Huang Hai Liang , Wang Dan , Jiang Hong Wei , Wu Chun Lei
Published: November 2012

Boron doped diamond (BDD) films were deposited on porous Ti substrates by direct current plasma chemical vapor deposition (DC-PCVD) system. For improve adhesion between diamond and porous Ti, and shorten diamond nucleation period, appropriate pretreatments were carried out. Micro diamond particles were mechanical embedded in the holes of porous Ti substrates and then nanodiamond powders were seeded on substrates by ultrasound sonication prior to deposition. The samples were examined by scanning electron microscopy (SEM), micro-Raman spectroscopy, and cyclic voltammetry. It was found that BDD films covered the whole porous Ti substrate surface, and exhibited the good electrochemical property.
Use of Finite Element Method in Study of Air Conditioning Clothes
Authors: Yang Shu
Published: November 2012

Finite element method is useful in research of nonlinear problems, and this method has been an obbligato tool in scientific research, engineering design, and product optimization. This paper aims to use finite element method in the study of air-conditioning clothes, for simulating the thermal flux in the microenvironment of body-clothes- macroclimate. Phase change materials are put on clothes to realize the air conditioning effect. NX nastran is adopted to do the simulation and analysis, and proved to be effective.
Features of Workpiece and Orificed Cathodes in Triple-Cathode Plasma Surface Alloying System
Authors: Rong Xing Fu , Rong Shuo , Qin Zhi Yu
Published: November 2012

The performing features of workpiece cathode (W electrode) and the orificed hollow cathode (P electrode) in the triple-cathode plasma surface alloying system are studied. Current densities of the W cathode and the P cathode are obtained under the conditions of the different voltages and the different chamber pressures, based on which current transmitting densities of the orifice of the P cathode are obtained and the conditions of plasma plume flow occurrences are, combined with the observe records of experiments, discussed and analyzed.
Research on the Tribological Properties of Ni-W Alloy Electric Brush Plating Coatings at Elevated Temperatures
Authors: Cai Bin , Tan Ye Fa , He Long , Tan Hua , Zhou Chun Hua , Jing Qi Feng
Published: November 2012

In order to improve the anti-wear and anti-corrosion properties of mechanical parts used in high temperature friction conditions, the Ni-W alloy brush plating coatings were prepared and their tribological properties at elevated environment temperatures were investigated. The results show that the friction coefficients of Ni-W/GCr15 tribo-couples are in the range of 0.168～1.048, which take on the decreasing trend as the increase of environment temperatures. The wear losses of the coatings increase at elevated temperatures, and the critical temperature in which the coatings produce serious wear from slight wear is 250°C. The wear mechanism of the coatings are micro-cutting at room temperature, then it changes into adhesive wear accompanied by a certain of delamination when temperature is high than 250°C. When temperature is higher than 400°C, the main wear mechanism of the coatings is adhesive wear and delamination.
Study on TiAl(CN) Particle Reinforce Composites Coating Prepared by Reaction Nitrogen Arc Welding Cladding Process
Authors: Ma Lu Ping , Li Jin Song , Zhang Li , Li Jian Chang , Hao Jian Jun
Published: November 2012

Particle reinforce composites coating of TiAl(CN) was made on the surface of Q235B steel substrate by reaction nitrogen arc welding cladding process, which take the titanium powder, aluminum powder and the graphite powder as original material. The microstructures, structure and the phase of the coatings were investigated by scanning electronic microscope, X-ray diffract instrument, micro-hardness, reciprocating friction testing machine. The result indicated that the TiAl(CN) coating has a metallurgy union with the substrate, the phase of the coatings are mainly composed of TiAl(C 0.51 N 0.12), AlFe3 and FeC. The microhardness and anti-abrasive performance of the TiAl(CN) coating is better than the Ti(CN) coating processed by tungsten nitrogen arc surfacing welding process.
Research on Transfer Coater with High Precision for Electrodes
Authors: Wu Shang Sheng , Liu Xiao Li , Lin Xiao Meng , Xu Jun Hong
Published: November 2012

The paper states the components of transfer roll coater for lithium-ion electrodes and the working principles of it.The high-precision coater with a unwinding unit, a coating unit, a drying unit, a leading unit and a rewinding unit has been developed. The methods which are focused on the manufacture precision, installation precision and control precision of the coating head to achieve higher coating accuracy were explored.
Effects of C6H8O7 and C3H8O3 in the Na2SiO3 Electrolyte on Characteristics of Coating Formed on ZAlSi12Cu2Mg1 by Micro-Arc Oxidation
Authors: Lu Kai , Liu Xiang Dong , Zhang Ya Ping , Gao Wan Zhong
Published: November 2012

Micro-arc oxidation coating on ZAlSi12Cu2Mg1 alloy were prepared in Na2SiO3 electrolyte, effects of C6H8O7 and C3H8O3 as additive on resistances of micro-arc oxidation coatings were investigated. Results show that coatings containing completest ceramic particles were obtained on alloys surface processed in electrolyte solution including 2.0 g/L C6H8O7 additive, the size of micro-arc wholes becomes larger with more C6H8O7, and it has improved with 1ml/L C3H8O3 in the solution. The results of XRD analysis indicates that the coatings are mainly composed of alumina and mullite. EDS analysis showed the element contains sodium, oxygen, silicon and aluminum. Wear resistance of coating were increased by adding C3H8O3.
Microstructure and Wear Resistance of Laser Cladding Nano-Al2O3/MCrAlY Composite Graded Coating on TiAl Alloy
Authors: Wang Dong Sheng , Tian Zong Jun , Wang Song Lin , Shen Li Da
Published: November 2012

In this paper, the pure MCrAlY coating and nano-Al2O3 particles reinforced MCrAlY graded coating were prepared on TiAl base intermetallic alloy substrates by laser cladding process. Furthermore, the microstructure characterization, microhardness and wear resistance of the two kinds of MCrAlY coating were comparatively investigated with scanning electron microscope (SEM), HXD-1000TC hardness tester and MM-200 block-on-ring dry sliding wear tester. The results show that the laser-clad pure MCrAlY coating has a dendrite crystals characteristic. However, the graded composite MCrAlY coating consists of fine equiaxed grains because of addition of nanometer ceramic particles. Moreover, the grain size becomes small with increasing the nano-Al2O3 content in the coating. The microhardness and wear resistance of the composite coating is higher than that of the pure coating. The mainly wear mechanism of the pure MCrAlY coating is abrasive and delamination, while the mainly wear mechanism of the composites graded MCrAlY coating is abrasive.
Springback Prediction Using the Split-Ring Test Based on a Combined Anisotropic Hardening Model
Authors: Niu Chao , Zang Shun Lai , Zhang Yang
Published: November 2012

Material model which could describe the Bauschinger effect is essential to accurately predict springback since strain path reverse is quite common in sheet metal forming. In this paper, a combined isotropic-kinematic hardening law which can capture the Bauschinger effect, transient behavior and permanent softening was used to model the hardening behavior. Also, the non-quadratic anisotropic yield function, Yld2000-2d, was chosen to describe the anisotropy. An inverse identificat- ion method was carried out to calibrate the material parameters by using uni-axial tension and Bauschinger simple shear tests. Experiments of cylindrical cup drawing and following split-ring tests were performed. Similar processes were carried out by numerical simulation, and springback predicted by present model was compared with experiments and that of vonMises model. The result shows that the current model significantly improves the accuracy of springback prediction.
Finite Element Simulation Analysis of Hydraulic Support Based on Virtual Prototype Technology
Authors: Zhang Y.K. , Xiao Lin Jing , Yang Jun Ru
Published: November 2012

Stress analysis and theoretical calculation of hydraulic support is studied and 3D modeling is built with Pro/E. The strength and displacement distribution of the hydraulic supports are obtained by means of finite element software ANSYS. The result can be applied to amend the design and to improve the hydraulic support’s reliability. It supplies the bases for the structure optimization of the shield hydraulic support.
Influence of Charges Shape on a Closely Air Blast Loading
Authors: Cai Jing Tao , Tang Ting , Ma Jin Bo
Published: November 2012

The purpose of the present paper is to investigate the influence of charge shape on the air blast loading near the explosive. By using MSC. DYTRAN, the air blast loading of spherical charge, cubical charge and cylindrical charge with the same weight were simulated. After the characters of shock wave, peak pressure and impulse of such three charges were compared, it can be seen that there are different decay law for peak pressure of cylindrical charge, cubical charge, spherical and experiment formula. There are also different magnitude relation for the impulse at different scaling distance.
Preparation of Nickel/Poly(m-Toluidine) Composites and its Magnetic Properties
Authors: Wang Hong , Jin Yong Zhong , Wang Tao , Liu Di , Li Xue Fei
Published: November 2012

Ni/poly(m-toluidine)(PMT) nanocomposites were prepared by in situ chemical oxidative polymerization of m-toluidine (MT) monomer in the presence of Ni powder, with ammonium persulfate (APS) as oxidant and citric acid (C6H8O7) as dopant. The resultant products were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC) and superconducting quantum interference device magnetometer (SQUID). The results exhibited that Ni/PMT nanocomposites show a ferromagnetic behavior with saturation magnetization strength (Ms) and coercivity of 28.4emu/g and 105.8Oe at room temperature. The prepared Ni/PMT composites were soft and ferromagnetic materials. Moreover, thermal Stability of nanocomposites was also investigated.
The Model and Simulation of SMT Production
Authors: Du Yi , Chen Qing Xin
Published: November 2012

Because of product variety of small electronic products enterprises,Their equipment is in condition of half stop production, resulting in the waste of equipment and personnel. Canon cell production from mixed line production mode innovation out of a new way of production, applicable to the production equipment is not too big, need manual operation of the production. This paper tells small batch orders and the premise, split mixed line composed of Canon cell production to improve production efficiency, reduce the cost. It gives the mathematical model and the simulation results.
Optimisation of Manufacturing Process Models via Intelligent Water Drop Algorithm
Authors: Luangpaiboon Pongchanun
Published: November 2012

In this paper, an intelligent water drop algorithm or IWD has been developed to optimise machining parameters in turning operation including a spring force model. Firstly, machining conditions are to minimise the production cost in conventional manufacturing processes. Several passes of rough machining are started on the turning operation with a final pass of a finishing. Various constraints are considered in each non-linear and non-convex model. The machining parameters in the turning consist of the depth of cut, cutting speed and feed. Finally, in a specialised manufacturing application on the spring force problem, an achievement of a specific goal may be the primary objective subject to some process parameter ranges. The computational results clearly showed that the proposed sequential procedures of the IWD have considerably improved the objective functions.
A Prediction Model of Deflection of Fixing Thin Parts
Authors: Liu Yu Mei , Liu Wen Ping , Jiang Zhao Liang , Li Zhi
Published: November 2012

A prediction model of deflection is presented. The Artificial Neural Network (ANN) is adopted, and ANN establishes the mapping relation between the clamping forces and the position of fixing and the value of deflection. The results of simulation of Abaqus software is used for Training and querying an ANN. The predicted values are in agreement with simulated data and experimental data.
Research Progress of Methods to Improve Fatigue Strength of Welded Structures
Authors: Fang Zong Tao
Published: November 2012

Fatigue fracture is the main failure form of welded structures. Fatigue strength of welded joints is far below that of base metal under the combined effect of stress concentration, molten slag defects in weld toe and residual tensile stress. Fatigue damage mechanism and main factors that affect fatigue strength of welded structures are analysis and summarized respectively. This paper emphasizes on introducing the research progress of various measures to improve the fatigue properties, including weld toe grinding, TIG dressing, local-heating and local extrusion method, hammering and shot blasting and ultrasonic peening treatment.
Study on Physical and Dynamic Properties of BR Based Composites Filled with Different Particle Size of Magnesia
Authors: Ding Nai Xiu , Hao Fu Lan , Li Lei , Sun Wen , Liu Liang
Published: November 2012

BR/MgO composites were prepared with seven kinds of particle sizes of MgO filled respectively. Effects of particle sizes on dynamic mechanical properties, vulcanization characteristics and physical properties of BR/MgO composites were studied. The results showed that the tensile strength of composites filled nanoscale of MgO was nine times of pure BR, and the vulcanization time was significantly shorter than that of composites filled with micron grade filler. The RPA experiments proved that the composites filled with MgO of 20nm and 50nm have greatly higher G＇, and that the G＇of the composites increase markedly while the value of tanδ decrease sharply with given temperature above 90 °C increasing. the higher value of tanδ at the frequency mode, and the obvious Payne effect compared with the composites filled micron grade of MgO
Study on Microstructure Evolution in GH4169 Alloy Blade during Finish Forging
Authors: Qi Guang Xia , Mei Rui Bin , Cao Na
Published: November 2012

Constitutive equations and dynamic recrystallization (DRX) model of GH4169 alloy were investigated using compression tests with temperature 940(°C)-1060(°C) and strain rate 0.001(s-1)-0.1(s-1). A coupled numerical simulation between thermal-mechanical and microstructure evolution was realized through embedding the developed user subroutines into the FEM software DEFORM-3D system. The simulated results show that higher speed of upper die is useful to the DRX but much higher and lower speed of upper die go against improving the finer and uniform of grain size in the blade. Furthermore, the grains are finer and uniform in the blade body compared with those of blade rabbet and damper platform. The experimental results of microstructure under the same forging condition were studied and the average grain degrees in the blade are over 9. The calculated results of microstructure have a good agreement with the measured value from experimental data and the prediction error is less than 7.0%. Therefore, the DRX model and developed program is reliable to optimize and improve the parameters in the blade finish forging.