bluuebunny/crossref_metadata_2025 huggingface dataset:
Evaluating Sustainability and Democracy in the Development of Industrial Port Cities: Some Italian Cases
Authors: Attardi Raffaele , Bonifazi Alessandro , Torre Carmelo
Published: November 2012

Strategic Environmental Assessment (SEA) is a major policy evaluation tool, for institutional processes, when they need to cope with fundamental risks, give voice to non-human agents, manage commons, and address environmental justice. The interplay of SEA with planning, unravels key issues and criticalities in both urban governance and environmental democracy. How can evaluation be developed to support the process? Structured evaluation methods applied in environmental assessment are maybe not sufficient to solve complex social conflicts. We point out some key reflections with the aim of opening up the discussion, by taking the case study of the environmental assessment of pollutant activities in the main industrial port cities of Southern Italy. They represent, at the moment, the most significant social criticality in our country, related to the interplay between environmental assessment and risk for labor. The paper focuses on the case study by mentioning the evolution of some thoughts about the red stripe that links sustainability, environmental democracy, and social evaluation, and illustrates the issues of these aspects in the case study, with the aim of underlining the difficulty of environmental assessment tools as a major support for planning processes, when social conflicts arise.
Human Coronaviruses: Insights into Environmental Resistance and Its Influence on the Development of New Antiseptic Strategies
Authors: Geller Chloé , Varbanov Mihayl , Duval Raphaël E.
Published: November 2012

The Coronaviridae family, an enveloped RNA virus family, and, more particularly, human coronaviruses (HCoV), were historically known to be responsible for a large portion of common colds and other upper respiratory tract infections. HCoV are now known to be involved in more serious respiratory diseases, i.e. bronchitis, bronchiolitis or pneumonia, especially in young children and neonates, elderly people and immunosuppressed patients. They have also been involved in nosocomial viral infections. In 2002–2003, the outbreak of severe acute respiratory syndrome (SARS), due to a newly discovered coronavirus, the SARS-associated coronavirus (SARS-CoV); led to a new awareness of the medical importance of the Coronaviridae family. This pathogen, responsible for an emerging disease in humans, with high risk of fatal outcome; underline the pressing need for new approaches to the management of the infection, and primarily to its prevention. Another interesting feature of coronaviruses is their potential environmental resistance, despite the accepted fragility of enveloped viruses. Indeed, several studies have described the ability of HCoVs (i.e. HCoV 229E, HCoV OC43 (also known as betacoronavirus 1), NL63, HKU1 or SARS-CoV) to survive in different environmental conditions (e.g. temperature and humidity), on different supports found in hospital settings such as aluminum, sterile sponges or latex surgical gloves or in biological fluids. Finally, taking into account the persisting lack of specific antiviral treatments (there is, in fact, no specific treatment available to fight coronaviruses infections), the Coronaviridae specificities (i.e. pathogenicity, potential environmental resistance) make them a challenging model for the development of efficient means of prevention, as an adapted antisepsis-disinfection, to prevent the environmental spread of such infective agents. This review will summarize current knowledge on the capacity of human coronaviruses to survive in the environment and the efficacy of well-known antiseptic-disinfectants against them, with particular focus on the development of new methodologies to evaluate the activity of new antiseptic-disinfectants on viruses.
CLASSICAL SOLUTION OF THE CAUCHY PROBLEM FOR BIWAVE EQUATION: APPLICATION OF FOURIER TRANSFORM
Authors: Korzyuk Victor , Vinh Nguyen Van , Minh Nguyen Tuan
Published: November 2012

In this paper, we use some Fourier analysis techniques to find an exact solution to the Cauchy problem for the n-dimensional biwave equation in the upper half-space ℝ n × [0, +∞).
ON THE ACTION OF A SEMI-MARKOV PROCESS ON A SYSTEM OF DIFFERENTIAL EQUATIONS
Authors: Annunziato Mario
Published: November 2012

We deal with a model equation for stochastic processes that results from the action of a semi-Markov process on a system of ordinary differential equations. The resulting stochastic process is deterministic in pieces, with random changes of the motion at random time epochs. By using classical methods of probability calculus, we first build and discuss the fundamental equation for the statistical analysis, i.e. a Liouville Master Equation for the distribution functions, that is a system of hyperbolic PDE with non-local boundary conditions. Then, as the main contribute to this paper, by using the characteristics’ method we recast it to a system of Volterra integral equations with space fluxes, and prove existence and uniqueness of the solution. A numerical experiment for a case of practical application is performed.
PRECOMPACTNESS OF THE SET OF TRAJECTORIES OF THE CONTROLLABLE SYSTEM DESCRIBED BY A NONLINEAR VOLTERRA INTEGRAL EQUATION
Authors: Huseyin Anar , Huseyin Nesir
Published: November 2012

In this paper the controllable system whose behaviour is described by a nonlinear Volterra integral equation, is studied. The set of admissible control functions is the closed ball of the space L p (p > 1) with radius µ 0 and centered at the origin. It is shown that the set of trajectories of the system is a bounded and precompact subset of the space of continuous functions.
PERIODIC ORBITS NEAR EQUILIBRIA VIA AVERAGING THEORY OF SECOND ORDER
Authors: Barreira Luis , Llibre Jaume , Valls Claudia
Published: November 2012

Lyapunov, Weinstein and Moser obtained remarkable theorems giving sufficient conditions for the existence of periodic orbits emanating from an equilibrium point of a differential system with a first integral. Using averaging theory of first order we established in [1] a similar result for a differential system without assuming the existence of a first integral. Now, using averaging theory of the second order, we extend our result to the case when the first order average is identically zero. Our result can be interpreted as a kind of degenerated Hopf bifurcation.
Hybrid Representation
Authors: Greysen Katherine R. B.
Published: November 2012

This chapter discusses the design of embodied pedagogical interface agents. The ultimate aim of the discussion is to suggest categorical or thematic design guidelines for pedagogical agents. The intent of the guidelines is to encourage multimedia designers to go beyond the current “one size fits all” mentality and encompass issues of race and gender in a way that provides meaningful learning experiences for a greater number of persons. The discussion will consider 43 participants’ self-construction of embodied pedagogical interface agents to identify issues of race, gender, and other design characteristics. Grounded theory methodology was employed to provide additional insight into the design and creation of each participant’s pedagogical interface agent. Four agent designs are included as appendices for reference.
E-Commerce Training with Virtual Commerce Simulation
Authors: Özpinar Alper , Yavuz Erdem
Published: November 2012

Over the last decade, commerce has experienced several major revolutions in size, structure, and competition. The importance of small and medium enterprises (SMEs) has become more important within this market structure. Electronic Commerce, commonly known as electronic marketing or e-commerce that consists of the buying and selling of products or services over electronic systems, is more profitable and affordable than ever before. However, few SMEs have been taking advantage of e-commerce due to the lack of education and training in new technologies. This paper presents the case study of e-commerce training for SME’s with the aid of classical classroom training and “Virtual Commerce,” an online commerce game. In Virtual Commerce, every participant owns a company and a certain amount of digital money. They can act as a consumer that purchase from other participant sites and as a supplier for the others. Market conditions, discount rates, and requirements are set by the system operators. This methodology and training has applied to 30 SME’s from different sectors. The aim of the project is to lower the costs for the SME’s e-commerce training through e-learning and to improve participants’ abilities with online simulation.
Trust in E-Commerce
Authors: Unsal Fahri , Komaromi Kurt , Erickson G. Scott
Published: November 2012

E-Commerce’s virtuality poses questions concerning trust between buyer and seller. Web 2.0 formats have provided new complications for these questions. Companies are creating more social networking sites, experimenting with ways to use such networks for marketing purposes. This paper explores the issue of trust in social networking site transactions vs. those at more established e-commerce sites. The authors apply the Technology Acceptance Model (TAM) to assess the level of trust in different types of e-commerce sites. TAM measures trust along several dimensions and includes potential explanatory factors, such as ease of use, perceived usefulness, search and research capabilities, security, value of product recommendations, and value of customer reviews. The authors directed the respondents to assess amazon.com, Facebook, and eBay—sites with different levels of institutional credibility and social networking affiliations. The data suggest definite differences exist between the sites, perhaps explained by institutional credibility and social networking.
Future Developments of E-Modules
Authors: Christova Alina
Published: November 2012

E-learning tools can be found on an occasional basis in higher education, in particular regarding social sciences. This paper concentrates on envisaged future developments of E-Modules, the innovative e-learning platform on European Union matters created by the Institute for European Studies, which is an autonomous department of the Free University Brussels. First, it provides an overview of the strategy and the concept of E-Modules as well as content, structure and main features of the e-learning tool including best practices and current challenges. The author also explores in depth the role interactive tools and multimedia can play in enhancing the transfer of knowledge and skills to the users of the E-Modules.
A Study on the Role of Open Education Faculty, the Leader of Distance Learning in Turkey, in Higher Education and its Educational-Social Dynamics
Authors: Karatas Togan , Karatas Elif Kartal
Published: November 2012

The distance learning method has changed the conception of classical education and training. In Turkey the distance learning mission has been undertaken by Anadolu University Open Education Faculty (OEF). Therefore, the presence of OEF in higher education has been considered as the need and demand for higher education through “distance learning system”. However, studying the state’s OEF move “a demand” is not sufficient for an integral analysis. The economic and political structure in the period when OEF was integrated into the education system was critical. In this context, there are significant social dynamics underlying the foundation of OEF as well. In this study, the differences between the distance learning experience in Turkey and other countries are analyzed. Besides the role and share of the OEF in higher education in Turkey is discussed and the socioeconomic reasons of the foundation of the OEF, as specified above, are studied within the framework of the background of the state’s educational move. Finally, the positive and negative views of the individuals on the OEF are presented in the study and suggestions are made in this framework.
Fuzzy QoS Based OLSR Network
Authors: Maheswari G. Uma
Published: November 2012

Quality-of-Service (QoS) routing protocol is developed for mobile Ad Hoc Networks. MANET is a self configuring network of mobile devices connected by wireless links. Each device in the MANET is free to move independently in any direction; therefore, it changes links to other devices frequently. The proposed QoS-based routing in the Optimized Link State Routing (OLSR) protocol relates bandwidth and delay using a fuzzy logic algorithm. The path computations are examined and the reason behind the selection of bandwidth and delay metrics is discussed. The performance of the protocol is investigated by simulation. The results in FQOLSR indicate an improvement in mobile wireless networks compared with the existing QOLSR system.
The Media Gatekeeping Model Updated by R and I in ICTs
Authors: Cossiavelou Vassiliki , Bantimaroudis Philemon , Kavakli Evangelia , Illia Laura
Published: November 2012

This paper explores the influence of digital technologies on media networks, in particular how they affect the traditional gatekeeping model. Wireless communications are the hot point of all digital technologies, and their application to the transmission of the Olympic Games is a milestone for the global creative industries every two/four years. The authors argue that the research and innovation (R&I) industries’ involvement with the media industries needs to be reconsidered within the framework of an updated media gatekeeping model. To investigate this research question, results are reported from a case study examining the gatekeeping processes in the 2008 Olympic Games in Beijing, and the subsequent Olympics up to 2016. Results show the need for a new gatekeeping model that takes into consideration the impact of digital technologies, especially wireless communications. Additionally, new decision models regarding innovation investment in the global media industry are suggested by the impact of R&I on the media gatekeeping model itself.
Digital Library Education
Authors: Kumar Naresh
Published: November 2012

This chapter talks about the meaning of digital library and covers the various features of digital libraries. A brief overview of digital library education through various mediums like online education and formal education is given in this chapter. The chapter provides a list of Indian universities that conduct PG Diploma in digital library with its duration and admission eligibility, etc. Some of the foreign universities that provide digital library education are discussed. The whole chapter revolves around digital library education. The chapter highlights the various course curriculums adopted in Indian as well as foreign universities. A list of projects carried out in digital libraries around the globe with all details such as purpose of project, funding agency, and period of project are represented in this chapter. It also covers the latest issues and challenges in digital library education.
Information Seeking Behavior in Digital Environments and Libraries in Enhancing the Use of Digital Information
Authors: Chauhan Kaushal , Mahapatra Rabindra Kumar
Published: November 2012

The authors discuss in this chapter the emergence of digital library environments of the modern world. The emerging field of digital libraries brings together participants from many existing areas of research. Currently, the field lacks a clear agenda independent of these other area. It is tempting for researchers to think that the field of digital libraries is a natural outgrowth of an already known field. From a database or information retrieval perspective, digital libraries may be seen as a form of federated databases. From a hypertext perspective, the field of digital libraries could seem like a particular application of hypertext technology. From a wide-area information service perspective, digital libraries could appear to be one use of the World Wide Web. From a library science perspective, digital libraries might be seen as continuing a trend toward library automation. New concepts and applications appear fast in the information world. Current exploitation of multimedia technology is changing our understanding of the interconnections of graphics, sound, and images, and the types of information they present. Thus, we need to understand both human psyche and available technologies in order to create and to interpret new expressions. The chapter highlights the benefits of digital information and how the libraries are helpful in enhancing the use of digital information. The chapter shows that libraries can provide Internet access, electronic contents, and training to the users. It explains the changing and changed attitude of information professionals in the present scenario.
Copyright Relevancy at Stake in Libraries of the Digital Era
Authors: Dubey Manju , Hirwade Mangala
Published: November 2012

Libraries are changing in every aspect to deal with the information dissemination process mainly pertaining to the form and format of “significant information,” which is the lifeblood of libraries. With copyrights restricting the uncontrolled and unbalanced use of information in the digital format, there is a need to understand that copyrights were brought to balance the synchronization of the creator, publisher, and the users at large. The chapter is an attempt to show the changing perspective of copyright in the digital era, its relevancy in the digital era, and how libraries can get the most out of the various exceptions and provisions provided for the libraries in copyright law, while at the same time striving to balance the copyright as well as solve various problems and issues cropping up from new digital perspectives.
IT Methods and Techniques Applied to Educational Quality Enhancement
Authors: Siakas Kerstin V. , Gevorgyan Rita , Georgiadou Elli
Published: November 2012

European Union countries aspire to create, through the implementation of the Bologna Process, an open European Higher Education Area, which increases the attractiveness of European higher education and the competitiveness of Europeans in the international labour market. This paper examines the importance of the Bologna Process in countries outside Europe and how effective implementation of a Quality Assurance action plan can enhance education quality. The authors apply Information Technology (IT) methods and techniques, such as Total Quality Management (TQM), Goal Question Metric (GQM) and Balanced ScoreCard (BSC), to Educational Management. The derivation of Key Performance Indicators (KPIs) is discussed, as well as their application to a case study at the Cybernetics Faculty of the State Engineering University of Armenia (SEUA), regarding the implementation of an education quality enhancement strategy. As a result of the effort to align to European Higher Education Standards and the Bologna Process, a degree of Business Process Re-engineering (PBR) was necessary. The results show that the main reason for university strategy development is better relocation of resources and determination of which programmes and services are efficient and consistent with the university’s mission.
Problem-Focused Higher Education for Shaping the Knowledge Society
Authors: Valtanen Juri , Berki Eleni , Georgiadou Elli , Ross Margaret , Staples Geoff
Published: November 2012

Higher education (HE) has not efficiently targeted a knowledge-shaped economy and has not kept up with the knowledge and IT skills demanded to resolve the problems from social- and work- exclusion. While recently unemployed knowledge workers are searching for new jobs, re-educating policies and career development options have not kept pace with work changes. There is an urgent need for a HE reform in order to address the current socio-economic and work-life crises. For this reform, the authors compare and contrast three promising learning approaches: problem-based learning PBL, work-based learning WBL and problem-focused education PFE. While in PBL and WBL work- and problem-related knowledge is transferred sufficiently, PFE seems to outperform. The paper points to an effective re-organisation of HE by (1) investing in PFE as the means to achieve quality in the learning process and its outcomes and (2) identifying ICT quality features for supporting the PFE learning process.
Collaborative Teaching Clusters at Carnegie Mellon University
Authors: Eaton Connie Deighan , Hennessey Kimberly A. , Koester Cheryl
Published: November 2012

Student and faculty needs for computer labs at Carnegie Mellon University have changed significantly in recent years to include collaborative workspace and support for multiple instructional activities during class times. The Collaborative Teaching Cluster (CTC) uses technology, furnishings, and a novel physical layout to meet these evolving needs. The CTC accommodates multiple kinds of instructional activities in one space and fosters interactions between faculty and students, group collaboration, and sharing student work.
Ranking Algorithm for Semantic Document Annotations
Authors: Rahayu Syarifah Bahiyah
Published: November 2012

Semantic annotation represents a metadata of the document based on domain ontology. The purpose of this paper is to develop a ranking algorithm for semantic document annotation and to evaluate its performance in the Semantic Web (SW) application. The evaluation is to compare the ranking algorithm against other algorithms. For the evaluation purpose, all the algorithms are applied into the SW application. The SW application is a research prototype retrieval engine, PicoDoc. The system framework of PicoDoc is based on OCAS2008 ontology. During the experimentation stage, a real-life dataset from news article corpus of ABC and BBC websites are selected. The experiment shows promising results in retrieving related information using the ranking algorithm.
Simulating Shop-Around Behavior
Authors: Kaneda Toshiyuki , Yoshida Takumi
Published: November 2012

Shop-around spatial behaviors of downtown visitors are characterized as MultiPurpose-MultiStop (MPMS). However, the authors’ investigations have revealed visitors frequently switch planned actions and generate improvised actions. By using an agent-based approach, especially with a medium-size specimen, simulating such spatial behaviors opens a rich vein of research, not only into such practical aspects as downtown revitalization but also several theoretical aspects. Based on data analysis, the authors have newly devised Agent Simulation of Shop-Around (ASSA). ASSA is a kind of activity-based model and each agent makes and remakes their schedule to visit shops based on time constraints and shop preferences, chooses alternative venues to visit when they fail in an errand, and makes impulse stops at shops and detour actions when time allows. A series of such activities carried out on one day will affect the next downtown visit schedule and so on. This paper refers to existing researches and briefly explains the features of ASSA, especially focusing on decomposition of the shop-around behaviors and the system components. The latest pilot ASSA ver.3 attempts a dynamic simulation of naturalistic and intelligent shopper behaviors. The authors then discuss the verifications by illustrating simulated performances in an actual shopping mall.
An Information Foraging Model of Knowledge Creation and Spillover Dynamics in Open Source Science
Authors: Özmen Özgür , Yilmaz Levent
Published: November 2012

Motivation and problem-domain preferences of scientists can affect aggregate level emergence and growth of problem domains in science. An agent-based model based on information foraging and expectancy theory is introduced to examine the impact of rationality and openness on the growth and evolution of scientific domains. To promote reproducibility of the simulation, a standard documentation protocol is used to specify the conceptual model. In the presented virtual socio-technical model, scientists with different preferences search for problem domains to contribute knowledge, while considering their motivational gains. Problem domains become mature and knowledge spills occur over time to facilitate creation of new problem domains. Experiments are conducted to demonstrate emergence and growth of clusters of domains based on local interactions and preferences of scientists. Based on findings, potential avenues of future research are delineated.
Correlations of Perceived Flow, Perceived System Quality, Perceived Information Quality, and Perceived User Trust on Mobile Social Networking Service (SNS) Users’ Loyalty
Authors: Suki Norazah Mohd
Published: November 2012

This research aims to examine the correlations of perceived flow, perceived system quality, perceived information quality and perceived user trust on mobile social networking service (SNS) users’ loyalty. Investigation of correlation between perceived user trust with perceived flow and user loyalty were also performed. Two hundred students were the subjects of a Malaysian university to answer survey questions on their currently chosen mobile social network system. The correlations between perceptual variables on mobile SNS were then analyzed and various causal relations deduced. Research findings indicate both perceived information quality and perceived system quality correlates with perceived flow and perceived users’ trust, which further correlate mobile SNS users’ loyalty. Perceived user trust correlates with perceived flow, and both factors correlates with user loyalty. Perceived flow is regarded as the strongest factor that correlates with users’ loyalty. The paper rounds off with conclusions and an agenda for future research in this area.
Study on Influence Factors of NMR T2 Spectrum Inversion
Authors: Li Peng Ju , Chen Hong An , Luan Zhao Yang , Gu Yu Feng
Published: November 2012

It is essential to investigate influence factors of inversion for improving inversion quality. Firstly to classify the influencing factors, then to make numerical experiment for each influence factor using the forward and inversion simulation technology. The results show that the collection parameters and quality of echoes have the great influence on the inversion quality, and the assigned parameters of T2 spectrum inversion have little influence. Hence, optimizing the parameter of echo collection can improve the T2 spectrum inversion quality and application effect of NMR. As for the assigned parameters, they could be selected flexibly according to the concrete conditions.
Influences of Heat Treatment on Spinning Process with Large Thinning Rate and Performance of 30CrMnSiA
Authors: Han Dong , Yang He , Zhan Mei , Yang Ming Yang , Mou Shao Zheng , Li Tian
Published: November 2012

In order to improve the limits of wall thickness reduction of 30CrMnSiA steel in process of spinning, realize multi-pass continuous spinning process, and furthermore improve the forming efficiency and shape accuracy of thin-walled shell of 30CrMnSiA steel in spinning process, the influence of traditional annealing and austenization plus spheroidal annealing on the structure performance of 30CrMnSiA steel and the spun performance of 30CrMnSiA steel are studied. Process parameters of traditional anneal and austenize plus spheroidal annealing are optimized to obtain higher plastic performance and lower ratio of yield strength to tensile strength. Spinning experiments of the workpieces that have been heattreated by the optimized traditional annealing process and austenization plus spheroidal process are completed. The result shows that the optimized austenization plus spheroidal annealing is beneficial to achieve a large thinning rate for flow spinning process, and can meet the demands of low cost and high efficiency of batch production.
Experiment System and Test Technology of Oil Fire and Explosion
Authors: Jiang Xin Sheng , Wang Bo , Liu Wen Hui , Ou Yi Hong , Wang Dong , Qian Hai Bing
Published: November 2012

To complete the experiment on occurrence, development, control and suppression of oil fire and explosion in the enclosed space, this paper developed a variety of simulation experiment platform and data test system of key parameters. This paper developed a series of simulation experiment bench, including simulation experiment bench of narrow enclosed space and volumetric enclosed space, see Fig. 1 to Fig. 2.this paper also developed data test system of key parameters, including the ultra-dynamic data acquisition and analysis system and the flame propagation speed test system, see Fig. 3 to Fig. 4. The experimental results show that these simulation experiment benches can provide comprehensive research conditions and support for oil fire and explosion simulation experiment under various conditions. Compared with the traditional fire sensor, the flame propagation speed test system has the characteristics of high sensitivity, zero false positives, and far detecting distance.
Power System with Wind Power Connection Anti-Peak Regulation Ability Analysis
Authors: Yang Dong Feng , Zhou Su Quan
Published: November 2012

In the condition of large scale wind power connection, the uncertain of the wind power output takes great challenge to the peak regulation. In this paper for some wind power connection system, the influence of wind power connection to the peak regulation was studied by analyzing the system load and the historical real data after the wind power connection. The computation model which evaluates the normal units’ anti- peak adjusting capability was built and the multiply integer program algorithm was used to solve this model. A real case was used to test the exactness and feasibility of the computation model.
Effect of Co Concentration on Composition and Electromagnetic Shielding Properties of Ni-Co-P
Authors: Wang Ming Qiu , Yan Jun , Cui Hai Ping , Du Shi Guo , Guo Yi , Li Hong Guang
Published: November 2012

Electroless Ni–Co–P alloys on PVC with sodium hypophosphite as a reducing agent in an alkaline bath was investigated. Silane coupling agent (KH560) was used during the pretreatment. The morphology, chemical composition, of the electroless plating film was characterized by scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS). The effect of Co concentration on its composition and electromagnetic shielding properties were examined. The results show that the plating rate decreased totally with increasing Co concentration. The structure of the as-plated Ni–Co–P alloys at all conditions is amorphous. When the concentration of cobalt sulfate concentration is 8g•L-1, electroless Ni–Co–P alloys exhibited better electromagnetic shielding properties, shielding effectiveness of which was 52 dB at 300 MHz. The Ni–Co–P deposits, therefore, are promising for applications in electromagnetic interference for plastics substrate.
Research of Flow Field and Temperature Field in 2D Annular Space of Air-Gap
Authors: Tang Lu , Lu Yi Ping , Deng Hai Yan , Wang Zuo Min
Published: November 2012

The flow in air-gap of turbo-generator was simplified to the rotating flow model in the 2D concentric cylinder annular space. According to the CFD principle, the rotating flow model equations of the laminar flow and the turbulent flow were solved with Finite Volume Method. After being compared with the analytical solution of the 2D concentric cylinder Couette shear flow, the 2D air-gap model, the boundary conditions and the calculation results were proved to be accurate. On the basis of the study of the velocity field, the energy equation and the radiation equation were added to study the temperature field in the annular space. The convection and the radiation heat transfer were considered under the first boundary conditions. The turbulent flow and temperature distribution of the annular space under the steady-state were analyzed
Simulation Environment for Dangerous Chemicals Transportation
Authors: Hu Hai Yan , Li Wei Da , Wang Peng Fei , Sun Li Ning
Published: November 2012

Aimed at the disadvantages of real test method for micro system, a simulation environment for dangerous chemicals transportation is developed. This simulation environment is based on the motion simulation platform, which is a kind of Hexaglide operation platform and has a total of 8 dof. With the motion simulation platform and the simulation environment, the motion parameters such as attitude, angular rate, velocity and acceleration and the environment parameters such as temperature, humidity, concentration of combustible gas, the inner pressure and liquid level of tank are measured by micro system and standard sensors simultaneously. With the comparison of test data, the micro system can be validated. In this paper, the structure of motion simulation platform is presented; the hardware structure and integration are described respectively; the software of simulation environment is introduced and some experiment results are shown.
Data Fusion of Ultrasonic Wave Sensor Static State Based on BP Neural Network
Authors: Wang Xue Song
Published: November 2012

Because Ultrasonic sensor is affected by temperature in the applications , the output of Ultrasonic sensor not only depends on objection parameter (distance) .The method of eliminating affection caused by non - object parameter based on BP neural network data fusion is adopted. The results show the method elimination affection based on neural network data fusion is feasible.
A Discrete Realization of Higher Resolution Phase Detection
Authors: Liao Ping Sung , Lee Chien Hua
Published: November 2012

To improve the resolution of optical meter in manufacturing machines, novel discrete higher resolution phase detection for optical grids in optical meter is proposed. It is well known that the output of optical grid is a pair of sinusoidal and co-sinusoidal signals. The way enriching the phase information roots upon three primitive elements: (1) the phase angle 2 per cycle can be encoded into eight /4 phase regions, (2) the chopping signal of each /4 region is either the replica or the mirror of the first phase region, and (3) amplitude-to-phase mapping is used to digitize the pair of sinusoidal and co-sinusoidal signals into a pulse sequence. The empirical result shows that the proposed diagram with an 8 bits A/D converter can digitize the resolution of a complete sinusoidal signal up to 800 pulses per cycle. When coupling to the manufacturing machines, the proposed phase splitter can promote their resolution to 1600 times.
Finite Element Simulation in the Dynamics Calculation of Bolted-Joint Interface
Authors: Ai Yan Ting , Bai Yan , Zhai Xue , Zhao Dan
Published: November 2012

Many components in modern mechanical structure are connected with bolts, and the behaviour of joints significantly affects the dynamic response of these structures. Based on the software of MSC. patran, firstly, a linear dynamic model for bolted joints and interface is developed. The joint interface is modeled using a technology of interface layer element(ILE) and multi-point constrains(MPC) technique. And then, using the MATLAB language, the properties of ILE material are optimized to simulate the bolted-joint interface stiffness. The material properties parameters are identified by using experimental data. This work takes aero-engine case model as an example, researching its model analysis under different pre-stress conditions to check the method and provide insight on how to model the joint interface in the dynamics calculation of bolted structure.
The Transmission System Dynamic Analysis Considering the Gear Installation Error of the Planet Gears for Ravigneaux Automatic Gearbox
Authors: Huang Kang , Zhang Juan , Chen Qi , Feng Guan Hua
Published: November 2012

At present, although the Planet Gears for Ravigneaux Automatic Gearbox is widely used, most studies focus on the automatic transmission shift rule, few for automatic transmission in the process of installation error to analyze their dynamic performance. This paper is mainly based on the blank area of the current research, focusing on analysis gear installation error to the influence of dynamic performance. This paper build 3D model by Solidworks, and use mechanical system dynamics analysis software (ADAMS) for establishing the virtual prototype of the Planet Gears for Ravigneaux Automatic Gearbox and run the dynamic simulation. Gain the speed, the gearing mesh force at various levels and the meshing frequency.
Stress Solutions of some Axisymmetric and Non-Axisymmetric Cases with the Principles of Elasticity: A Review
Authors: Ankalkhope Suhas , Jadhav Nilesh , Bhat Sunil
Published: November 2012

Stress solutions are reviewed for some typical cases of axisymmetric and non-axisymmetric loads over a structural member with the principles of elasticity. A curved bar is chosen for the analysis. Tangential, radial and shear stress are determined analytically using Airy’s stress function. The curved bar is also modelled by finite element method to obtain numerical values of stress. Analytical and numerical results are in excellent agreement with each other.
The Mechanism Analysis of Horizontal Vibrated Conveyor with Inclination
Authors: Song Chao Sheng , Huang Qi Ming , Xu Jie , Gao Zhan
Published: November 2012

Considering the transition effect of static friction to dynamic friction, a two degree-of- freedoms vibration model of a new type of horizontal vibrated conveyor with inclination which can be used for continuous charging of electric arc furnace is formulated using d'Alembert principle. Based on the proposed vibration model, a program is wrote and the transmit mechanism is investigated. Computational results reveal numerous interesting conveying characteristics which can be used to forecast and control the vibration of the scrap and the conveyor.
Application of ANSYS Program in Ductility Analysis of Reinforced Concrete Frame Structure with Specially-Shaped Columns
Authors: Wang Kai Bin , You Chun An , Xin Li Min
Published: November 2012

In this paper, the writer analyzed a three-ply reinforced concrete frame structure with specially shaped columns through compiling a program by finite elements program of ANSYS. The results of simulated approached to experimental dates by comparison them. Which mean that use ANSYS program simulated ductility performance of reinforced concrete frame structure with specially shaped columns under reversed cyclic load is feasible. The simulation reflected the ductility of reinforced concrete frame structure, in which from load-on till destruction is perfectly.
Describing NC Smooth Path Based on the Adjustable Form of the Cubic Spline Interpolation Function
Authors: Song Ai Ping , Huang Jian , Tao Jian Ming , Yi Dan Ping
Published: November 2012

In order to describe the NC processing path better, and easy to realize path in a smooth transition of inflection point, this paper puts forward a kind of adjustable form of the cubic spline interpolation function; using the function can describe line, arc and freecurve, and realize smooth transition of inflection point through the control points which near the inflexion point. The spline function is of cubic polynomial, which calculation is simple, and it is easy to realize the operation of fast interpolation; it not only can describe various of NC paths, but also can be easy to realize the high speed of smooth processing between the NC orbit segments, which meets the needs of modern numerical control system for high speed, stability and flexible.
Computer Aided and Reversed Design of Auto Fans
Authors: Zheng Xin Jian
Published: November 2012

A 3D coordinate measuring method was determined on the basis of the analysis about structure of the auto fan; plan of the key point data collection was stated; Pointed out the whole process of computer aided and reversed design which includes from choice of key point, curved fitting, curved surface to 3D design.
Design and Simulating Analysis of Compressed Garbage Transport Truck Lifting Mechanism Based on ADAMS
Authors: Xu Wan Hong , Zhang Cheng Shuang , Wang Shou Yan
Published: November 2012

The different lifting mechanisms of compressed garbage transport trunks are analyzed and compared, and the impact of characters and parameters on the functions of the machines is also analyzed. Finally, a kind of lifting mechanism on the basis of the principle of double docking bars is put forward. Creating 3D models of lifting mechanism based on the Pro/E, and using ADAMS to simulating analysis about motion process of mechanism, then the dynamic curve about acceleration of waste bin, press of hydraulic cylinder and other parameters can be gotten, which is valided of optimality of the mechanism and provided reference for a more comprehensive analysis and optimization of similar institutions later.
A Connecting Method for Offset Contour of Planar Polygon
Authors: Wang Hua Bing , Liu Wei Jun , Bian Hong You
Published: November 2012

Triangular mesh is a digital representation mode widely used in CAD and CAM. And the connection of the offset vertexes is an important step in the edge isometry based polygon offset operation in path planning of layer milling complicated surfaces represented by triangular mesh. A vertex classification based connectiong method was presented. It avoids the vertex reflection, shortens the length of the contour and improves the performance of edge isometry based offset algorithm.
Design of Turning Area for LNG Terminal Base on Computer Simulation
Authors: Fan Yao Tian
Published: November 2012

Design of turning area for sea port is generally done according to the outcome of theoretical calculation or real-ship trial. However, these methods only take into account some limited respects for planning a port or are not so cost-effective. In this paper, computer simulator is used for optimizing the size of turning area for Yangshan LNG terminal. The outcome indicates that the major axis and minor axis of the turning area can meet the requirement of Q-Max LNG carrier berthing operation and it is suggested to do such maneuvering in some given conditions related to wind, current, tide, visibility and wave.
The Design and Analysis of Closed-Coupled Exhaust Manifold
Authors: Xu Rang Shu , Yan Xiang Feng , Niu Ling , Dong Zhi Wei
Published: November 2012

The layout of closed-couple catalyst converter in internal combustion engine exhaust system is one of important way to reduce vehicle emission. CFD method based on finite volume method is adopted to numerical simulate flow distribution in the entrance of closed-coupled catalytic converter and applying business software of FLUENT to clarity the flow uniformity of inlet to ensure catalytic converter work efficiently and meet regulations. The flow field uniformity of entrance were studied and analyzed. Research finds that the shape of manifold has effect on dispersion of velocity in entrance and dispersion of velocity has a relatively strong correlation with pulsation flow. The flow reverse in junction deflect the air flow that flow into the entrance of closed-couple catalyst converter. Calculation results indicate that the uneven rate coefficient is 0.266 and volatility is 0.515 in the entrance of closed-couple catalyst.
A Study on Parameter Design of Powertrain for Extended-Range Electric Vehicle
Authors: Xu Chun Hua
Published: November 2012

The motivation for this development is to establish a new method of powertrain structural analysis and parameters matching of extended-range electric vehicle. For the main drawback of pure electric vehicle, which driving distance is short, the new powertrain will achieve efficient operation of range extender and extend the driving range effectually. The innovative technique is based on a co-simulation platform of AVL-Cruise and Simulink. A thermostat energy management strategy is adopted to verify the parameters of powertrain. Finally, the simulation results demonstrate that the system design and parameters matching of the whole vehicle powertrain are reasonable.
Optimization Design of Trusses Based on Covariance Matrix Adaptation Evolution Strategy Algorithm
Authors: Su Guo Shao , Zhang Yan , Wu Zhen Xing , Yan Liu Bin
Published: November 2012

Covariance matrix adaptation evolution strategy algorithm (CMA-ES) is a newly evolution algorithm. It has become a powerful tool for solving highly nonlinear multi-peak optimization problems. In many real-world optimization problems, the location of multiple optima is often required in a search space. In order to evaluate the solution, thousands of fitness function evaluations are involved that is a time consuming or expensive processes. Therefore, conventional stochastic optimization methods meet a special challenge for a very large number of problem function evaluations. Aiming to overcome the shortcoming of stochastic optimization methods in the high calculation cost, a truss optimal method based on CMA-ES algorithm is proposed and applied to solve the section and shape optimization problems of trusses. The study results show that the method is feasible and has the advantages of high accuracy, high efficiency and easy implementation.
Finite Element Analysis of Portable Exoskeleton Based on Ergonomics Parameters Model
Authors: Liu Fang , Cheng Wen Ming , He Lan
Published: November 2012

Improvement of Weight capacity and weight-bearing exercise endurance in human are the main purpose of Portable Exoskeleton. The object of study is the Exoskeletons mechanical structure and through it to improve the structure bearing capacity. Firstly, this study takes the data of Chinese adult body size as the related parameters in ergonomics of Exoskeleton. Also the ergonomics parameters of pivotal bearing parts such as hip, thighs and legs will be confirmed according to the 50 percentage data of the data of Chinese adult body size. Based on it, 3D model of Portable Exoskeleton have been established by using Solidworks software and fast assembly of Exoskeleton’s parts have been accomplished. At the same time 3D Model have been conversed the x_t format and to be guided into the ANSYS software. A finite element based strength analysis of the mechanical structure of the external skeletal is then achieved with the load being 800N and the operating condition being one-leg standing. The numerical results show that key parts of the external skeletal meet the requirements. The maximum stress value is 127Mpa by ignoring the stress concentration phenomenon, confirming the reasonability of the structure design. Nevertheless, stress value on exoskeleton joints exceeds the material strength, some suggestions are then proposed on joint design.
Minimizing Surplus Parts in Selective Assembly Using GA
Authors: Fei Jun Feng , Lu Cong , Wang Song Ling
Published: November 2012

Selective assembly is a method of obtaining high-precision assemblies from relatively low-precision components. In selective assembly, the mating parts are manufactured with wide tolerances. It is impossible that the number of components in the selective group will be the same, and a large number of surplus parts exist according to the difference in the standard deviations of the mating parts. A method with new grouping method and chromosome structure is proposed to minimize surplus parts by using genetic algorithm.
Simulation Analysis and Optimization Study on Automotive Air Suspension
Authors: Ding Yi , Zhang Bin
Published: November 2012

A virtual prototype model has been established by using ADAMS and based on which the simulation of the main alignment parameters of vehicles with air suspension system has been analyzed. Focus on the unreasonable parameters that are off design, after confirming the design variable, the optimization has been done. According to the simulation and structure optimization, compared with un-optimized air suspension, the sideslip offset has reduced by 60.6%, which effectively achieve the target for structure optimization.