bluuebunny/crossref_metadata_2025 huggingface dataset:
On Realizing Emotional Memories
Authors: Singh Saurabh K. , Jha Shashi Shekhar , Nair Shivashankar B.
Published: May 2016

Emotion and memory have been two intermingled areas in psychological research. Although researchers are still fairly clueless on how human emotions or memory work, several attempts have been made to copy the dynamics of these two entities in the realm of robotics. This chapter describes one such attempt to capture the dynamics of human emotional memories and model the same for use in a real robot. Emotional memories are created at extreme emotional states, namely, very positive or happy events or very negative ones. The positive ones result in the formation of positive memories while the negative ones form the negative counterparts. The robotic system seeks the positive ones while it tries to avoid the negative ones. Such memories aid the system in making the right decisions, especially when situations similar to the one which caused their generation, repeat in the future. This chapter introduces the manner in which a multi-agent emotion engine churns out the emotions which in turn generate emotional memories. Results obtained from simulations and those from using a real situated robot described herein, validate the working of these memories.
Studying the Suitability of Discourse Analysis Methods for Emotion Detection and Interpretation in Computer-Mediated Educational Discourse
Authors: Daradoumis Thanasis , Lafuente Marta María Arguedas
Published: May 2016

Conversation analysis (CA) and discourse analysis (DA) methods have been widely used to analyse classroom interaction in conventional educational environments and to some extent in e-learning environments, paying more attention to the 'quality' and purposes the discourse serves to accomplish in its specific context. However, CA and DA methods seem to ignore emotion detection and interpretation when analysing learners' interaction in online environments. Effective regulation of emotion, motivation and cognition in social interaction has been shown to be crucial in achieving problem-solving goals. The aim of this chapter is to provide an in-depth study on the possibility of applying discourse analysis methods in e-learning contexts with implications for emotion detection, interpretation and regulation. The result of this study shows whether a comprehensive approach that includes DA methodological solutions and constructivist strategies (e.g., cognitive dissonance) for emotion detection and interpretation can be elaborated and applied.
Digital Mobilisation and Identity after Smart Turn
Authors: Fehér Katalin
Published: May 2016

Users have digital and digitally mobilised footprints. The online data sets are defined and identified within their different networks. These result in data sets and interactive markers via personal media such as digital/mobile/smart devices. The compass-devices support to manage everyday life and to define digitally mobilised identities in online networking society, culture, and business. This chapter studies the digitally mobilised identitiy in a multitasking context, digital trends that shape personal/organizational mobile identity, and emerging technologies, services, and cases that support these changes and challenges.
Designing a cMOOC for Lecturer Professional Development in the 21st Century
Authors: Cochrane Thomas , Narayan Vickel , Burcio-Martin Victorio
Published: May 2016

This chapter explores the design of a framework for up-scaling a lecturer professional development strategy based upon communities of practice from pockets of excellence to span across a university utilizing a cMOOC framework. The framework links global experts into an authentic professional development experience via the integration of a range of mobile social media learning technologies. The framework includes a series of triggering events designed to support the development of participants' personal eportfolios and pedagogical practice that can then be optionally validated by external CMALT accreditation. We believe the framework provides a transferable professional development model for other institutions to explore.
Introducing iPads into Primary Mathematics Classrooms
Authors: Attard Catherine
Published: May 2016

The fast pace of technology has meant that new technologies are often being introduced into classrooms without knowledge of how they can be used to enhance teaching and learning in mathematics. This chapter explores how a small group of teachers used a new technology, the iPad, to teach mathematics within the first six months of their implementation and without the support of professional development. Findings from two separate studies are presented to support the argument that care should be taken when introducing any new technology to teach mathematics in primary classrooms and appropriate professional development that addresses the combination of mathematical content, pedagogy and technology is critical for all teachers, regardless of teaching experience.
TAP (Teacher Learning and Application to Pedagogy) through Digital Video-Mediated Reflections
Authors: Arya Poonam , Christ Tanya , Chiu Ming Ming
Published: May 2016

This chapter presents relevant findings from research that explored literacy teachers' self-reflections and reflective discussions with peers that were mediated by digital video. Mixed methodological approaches were used, including statistical discourse analysis, which examines the relations between speech-turns in teachers' video discussions to provide a fine-grained view of digital video's mediating role. Findings showed that recursive viewing of videos, across different contexts or within a context facilitated shifts in purposes for discussing videos and broadened the foci of these discussions. Additionally, the situated context and multiple modes of information presented in digital videos supported literacy teachers' generation and application of ideas about reader processing and reader engagement. Teachers used certain conversation moves, such as critical thinking, hypothesizing, and challenging, as they transacted with the multimodal information in the video to support their generation of ideas for literacy instruction. Implications and future research directions are discussed.
Teacher Insight on RTI Implementation at the Middle and High School Levels
Authors: Epler Pam L.
Published: May 2016

The Response to Intervention (RTI) service delivery model has been incorporated at the elementary school level with success but is still lagging behind within the secondary school environment. This chapter demonstrates how two secondary schools, one a middle school and the other a high school, implemented the RTI model efficiently and effectively. The chapter shows that the RTI model can be successfully executed in different ways depending on a school's needs, funding, and personnel. The chapter provides details on the diagnostic practices, data collection methods, intervention strategies, administrative support, and professional development of each implemented model and includes insight from actual teachers and school counselors who participated in the implementations. A reflection on lessons learned from each school site is included.
The Role of Early Learning Experience in Shaping Teacher Cognition and Technology Use
Authors: Attia Mariam
Published: May 2016

This chapter explores the role of teachers' early learning experiences in shaping their pedagogical beliefs and practice specifically in relation to technology use. Following a case study approach, the accounts of three in-service Arabic language teachers from a private institution of higher education in Cairo, Egypt, were examined. Practitioners with years of professional experience are not expected to have encountered elements of technology as we know today in their schooling. Nevertheless, findings suggest that conceptions formed early in life of what constitutes “good” or “bad” teaching act as filters through which new experiences, including the use of digital media, are internalized. As imprints of early learning experiences are manifested in teaching, it is the responsibility of teachers to look back on them for possible influences on their pedagogical theories. In complementary fashion, the study foregrounds the role of teacher education in mediating initial conceptualizations of teaching and learning and accentuates the value of reflective practice for continuing teacher development.
IFRS for SMEs
Authors: Iris de Morais Márcio , Macagnan Clea Beatriz
Published: May 2016

In this chapter examines the perception of accountants in the State of Mato Grosso, from Brazil, on continuing professional education on IFRS applied to small and medium enterprises - SMEs. After the introduction, where we present this chapter, we contextualize the theory of human resources, with theoretical assumptions. In the next item, we revise of Brazilian accounting standards for SMEs and their regulatory environment. The literature review is completed with the item that addresses content on continuing education. The next step we present the methodology and the date analysis. To collect the evidence, we used questionnaires to accountants responsible for active financial services companies in the State of Mato Grosso. With a sample of 302 responses from a population of 1597 organizations, a descriptive analysis using frequency distribution, measures of central tendency and variability was performed. It is concluded that the perception of accountants indicates that they recognize the possibility of improvement in job performance, as well as greater employability and income. They still set regular level of difficulty in the submission of financial statements in accordance with the new standard: IFRS for SMEs. The study indicates the need to offer continuing education, pointing the Regional Accounting Council and universities as important promoters in the process of qualification of accounting professionals.
The Relationship between Transformational Leadership Characteristics and Multicultural Education Practices in Teacher Educators
Authors: Greene-Clemons Cheresa
Published: May 2016

This study focuses on the relationship of transformational leadership characteristics in teacher educators and their multicultural education practices as an avenue to prepare and produce more teachers for the increasingly diverse P-12 student population in the 21st century. The more transformational leadership characteristics teacher educators possess, the more multicultural education practices are carried out by them towards producing and transforming teachers to carry out the same characteristics and practices in their classroom. Examples in this study illustrate the importance of the relationship in the teacher educator/teacher-student cycle. Overall, the research findings support that there is a relationship between teacher educators' transformational leadership characteristics and multicultural education practices. Finally, this study highlights the need to provide professional development for teacher educators to enhance their transformational leadership characteristics as well as their multicultural education practices.
The Roles of Age, Gender, and Ethnicity in Cyberbullying
Authors: Wright Michelle F.
Published: May 2016

Children and adolescents have become active users of electronic technologies, with many of them blogging, watching videos, and chatting via instant messenger and social networking sites. Many of these activities have become a typical part of their lives. Electronic technologies have brought many conveniences to the lives of children and adolescents. Along with the opportunities associated with these technologies, children and adolescents are also susceptible to risks, including cyberbullying. Therefore, many researchers have become concerned with identifying which factors might predict children's and adolescents' involvement in these behaviors. Some predictors that researchers have focused on include age, gender, and ethnicity, but the findings were mixed. This chapter draws on research to review studies on the relationship of age, gender, and ethnicity to children's and adolescents' cyberbullying involvement and concludes with solutions and recommendations as well as future directions for research focused on these predictors and cyberbullying.
The Electric Soul
Authors: Cline Benjamin J.
Published: May 2016

This chapter will use media ecology, and rhetorical theories of ideology construction and social intervention to look at the ways that contemporary digital media interact with religious and spiritual practices in order to inform and create identities. This chapter will examine the ideology construction that occurs in the Crosswire.org applications, specifically PocketSword designed for the iPhone/iPad and AndBible designed for Android devices. This chapter will also look at the ideology construction and identity creation in the English language section of onislam.net, a website designed to help English-speaking Muslims live out their faith. Finally the chapter will consider Osel Shen Phen Ling, a website designed for “Practicing Buddhadharma in the Tibetan Gelugpa Tradition”.
Attacks on Online Banking and Commerce
Authors: Balasubramanian Kannan
Published: May 2016

With the arrival of the internet, cell phones, e-mail, instant messaging and social networking sites we can do many wonderful things electronically now that make our lives easier and more productive. We should get used to the idea that a good part of our social life can happen in cyberspace. You can keep up with your friends and meet new ones through a keyboard, microphone and a webcam. You can send a detailed e-mail, send a quick message or alert your circle of friends and followers about the latest details what's happening around you. At the same time, we should come to terms with the fact that the cyberspace is flooded with attacks from people who are unscrupulous in their intent to damage others in the cyberspace. The attacks date back to the time when telephone was invented, when the attackers found way to invade people's privacy. For most users, the web is just part of a well-rounded life that includes both a cyber world and a real world. The internet can be helpful, educational and fun. But It can also become an obsession leading to waste of time and money. Just because cyberspace is virtual, that does not mean that there are not real dangers out there. The same sort of bad people who can cause problems for people in the “real” world are also lurking on the internet. They spend their time looking for ways to steal your money, ruin your name or even cause you harm.
Threats and Attacks on E-Commerce Sites
Authors: Balasubramanian Kannan
Published: May 2016

In this chapter, a detailed knowledge of some of the most devastating attacks against Web applications and common tools in the attacker's arsenal is discussed. There are many ways of categorizing and classifying attacks: based on the complexity to mount them, the effect they have on the target system, the type of vulnerability that they exploit, the assets that they expose, the difficulty of detecting and fixing them, and so on. There are different methodologies for Vulnerability Assessment and Threat Analysis (VATA) and many sources to consult for assessing the risk of each attack. Among other sources, in this chapter we pay special attention to the methodology of Open Web Application Security Project (OWASP) because OWASP is one of the most active security communities on the Web. Other good resources to follow the attack and vulnerability trends are Common Vulnerabilities and Exposures (CVE), National Vulnerability Database (NVD), United States CERT Bulletins (US-CERT), and SANS.
A Framework for Developing Management Intelligent Systems
Authors: Sun Zhaohao
Published: May 2016

This paper proposes a framework for developing management intelligent systems (MiS). The proposed framework identifies the main management functions, intelligent systems and decision support systems (DSS) for planning, organizing, leading and controlling, and their corresponding applications as the core components of MiS. It integrates the main management functions with intelligent systems and DSS in a context of decision making by managers in organizations. This paper also examines intelligent systems for management and management decision making. The approach proposed in this paper might facilitate research and development of MiS, management, intelligent systems, and information systems.
Modelling of Formwork Pressure Using Self-Compacting Concrete by Numerical Methods for Attaining Environmental Sustainability
Authors: Shanmughan Shini , Kannan Ramesh
Published: May 2016

Self-Compacting Concrete does not require any kind of external vibration for its placing and compaction. It possesses the ability to flow under its own weight and to fill the formwork completely which will result in full compaction even in the case of congested reinforcement. The pore structure of the self-compacting concrete is different that of traditional concrete which results in changes in durability behavior. The pressure exerted by the concrete mix has its own significance in defining the durability aspects of the self-compacting concrete. This research includes a brief review how efficient modelling of SCC can be used to achieve sustainability. The prevision of the theoretical model are compared with the pressure value obtained at the end of casting carried out on a formwork along with the readings of the progression of probable yield stress of the cast concrete. After this the assumptions of the model during casting phase are compared to the results from the available literature and explain the validity of the proposed model to explain and forecast the experimental review.
Finite Element Simulation of the Cutting Process for Inconel 718 Alloy Using a New Material Constitutive Model
Authors: Wang Xiang Yu , Huang Chuan Zhen , Wang Jun , Zou Bin , Liu Guo Liang , Liu Han Lian
Published: May 2016

Inconel 718 alloy is a typical difficult-to-cut material and widely used in the aerospace industry. Finite element simulation is an efficient method to investigate the cutting process, whereby a work material constitutive model plays an important role. In this paper, finite element simulation of the cutting process for Inconel 718 alloy using a new material constitutive model for high strain rates is presented. The effect of tool cutting edge radius on the cutting forces and temperature is then investigated with a view to facilitate cutting tool design. It is found that as the cutting edge radius increases, the characteristics of tool-work friction and the material removal mechanisms change, resulting in variation in cutting forces and temperature. It is shown that a smaller cutting edge radius is preferred to reduce the cutting forces and cutting temperature.
Heat Conduction in Coated Tools during Cutting Based on Finite Element Simulation
Authors: Du Jin , Liu Zhan Qiang , Zhang Jing Jie , Xu Pei Li , Guan Yan Jin
Published: May 2016

Cutting tool temperature which mainly depended on the tool-chip interface temperature has crucial effect on the tool service performance and its life. It is essential to investigate the heat conduction in the cutting tool in order to define the temperature distribution on the cutting tool during machining. Advanced coating materials are adopted to deposit on the carbide substrate to enhance the tools’ cutting performance. Thus, the influence of coating layers on the heat transfer during the cutting process has been an important research topic. Advantage software was employed to simulate the cutting process in this paper. The influences of coating materials on the temperature distribution in the cutting tools were investigated. The study results show that KCU10 cutting tool with TiAlN/TiN coating layers shows good thermal properties than that of KT315 cutting tool with TiN/TiC/TiN coating layers. The cutting temperature along the tool-chip contact length shows increasing trend first with the distance from the tool tip point and then decreasing after the tool-chip separation point. Under the same coating thickness, TiAlN coating material presents better thermal properties than TiN coating material.
Empirical Research on Public Transport Type Escalator Riding Traffic Characteristics
Authors: Xu Jian Fang , Li Xiang Dong , Li Geng , Gao Zhu
Published: May 2016

Through China's major cities such as Beijing, Shanghai, Nanjing, Xi'an, Changzhou and other public transport of passengers riding the escalator traffic characteristics of the data field acquisition, processing and analysis, summed up the escalator at the entrance and the middle section and passenger traffic characteristics capacity, established the escalator traffic density corresponding graph density and velocity graphs. According to the above conclusion, this paper presents the design choices of application notes, study for public transport type escalator classification, management and peak evacuation design provides a theoretical basis.
Process Optimization of Lapping Sapphire Substrate with Fixed Diamond Abrasive Pad
Authors: Wang Jian Bin , Li Zhen , Gao Hong , Shu Da , Xiao Ping
Published: May 2016

The production cost of the sapphire substrate was restricted by the efficiency of processing and the surface quality. A proposed level orthogonal experiment was conducted to reveal the effect of workbench speed, lapping pressure, the Concentration of triethanolamine and abrasive pad types on the material removal rate and surface roughness and morphology of sapphire substrate when lapped with a diamond fixed-abrasive pad. The results showed that the average material removal rate of sapphire is about 24μm/min, and the surface roughness Ra achieves 0.36μm when the 200/230 mesh diamond fixed-abrasive pad was used. The material removal rate and the surface roughness as the optimization goal, the optimal lapping parameters were as follows: the lapping pad with raised, lapping pressure 0.075MPa, workbench speed 120rpm and the Concentration of triethanolamine 1%. Under these optimal machining parameters, the material removal rate reached 42μm /min and the surface roughness Ra reached 0.37μm.
Study on the Cutting Performance of Al2O3-TiC-TiN Ceramic Tool Materials
Authors: Fei Yu Huan , Huang Chuan Zhen , Liu Han Lian , Zou Bin
Published: May 2016

In this work, two kinds of Al2O3-TiC-TiN ceramic cutting tools (AC2U and AC2UN2) were developed by hot-pressing sintering techniques. The mechanical properties were measured and the cutting performance was investigated. The workpiece used in the cutting experiment was quenched carbon tool steel T10A, and the tool material for comparison was LT55. The wear resistance and the main wear patterns of the ceramic tools were analyzed at the high speed of 300m/min. The results indicated that the novel Al2O3-TiC-TiN ceramic cutting tools showed better cutting performance than LT55, and AC2UN2 was better suitable for machining quenched T10A. When the cutting condition was v=300m/min, f=0.1mm/r and ap=0.1mm, the adhesion wear and abrasive wear of the novel ceramic tools were slighter than those of LT55, the diffusion wear resistance of AC2U was better and the oxidation resistance of AC2UN2 was better.
Experimental on the Performance of Centrifugal Fan with Limited Size by Changing the Openness Distribution
Authors: Zhao J. , Wu C.J. , Xia C.F.
Published: May 2016

Openness is of great importance in centrifugal fan design. An experiment research has been designed to study how the openness distribution affects the performance of multi-blade centrifugal fan, which is designed with limited size. The results show that the openness adopted proper acceleration-deceleration distribution curve has a better performance.
Application of RS-SVM in Coal Mine Fire Warning System
Authors: Zhou Hua Ping , Xiong Bo Jie , Wang Cheng Jun
Published: May 2016

In order to reduce the false alarm rate in coal mine fire warning system, we apply information fusion technology to the system and propose a fire forecast algorithm based on Rough Set Support Vector Machine ( RS-SVM ). Firstly, we map the feature description of coal mine fires to the knowledge representation system described by rough set; Secondly, we discrete the continuous attributes and eliminate the redundant information for attribute reduction to form a rule set of this knowledge representation system; At last, we use the above rule set as the training sample to optimize the parameters for the fire warning support vector machine. The experimental results show that the accuracy of the algorithm is very high. It can make timely and accurate prediction of coal mine fire.
Fault Tree Analysis of Pantograph Type Current Collector Based on Ontology Modeling
Authors: Song Long Long , Wang Tai Yong , Xu Lei , Song Xiao Wen
Published: May 2016

Complex mass faults diagnosis of the pantograph type current collector was difficult. Based on the analysis of the structure, working principle and failure mode of the pantograph type current collector, fault tree of the pantograph was established. A lot of expert knowledge has been collected to support this diagnose process. Some serious problems such as ambiguity, uncertainty and inconsistency exist in the knowledge. Focused on the deficiencies, ontology modeling was proposed in this paper. StrOnto, FaultOnto and FTOnto were established to standardize the knowledge and to improve the efficiency of fault diagnosing. Finally, combined with the example of the pantograph type current collector of CRH2 EMU-train, the proposed algorithms proposed in this paper were proved reasonable and effective.
Frequency Characteristics Analysis of Micro-Displacement Structure with Parallel Flexure Hinges
Authors: Lin Jie Qiong , Lu Ming Ming , Zhou Xiao Qin , Liu Qiang
Published: May 2016

Flexure hinges based micro-displacement structure has been widely used for micro-precision machinery, and the natural frequency characteristics analysis is one of the most important elements in the structure design. In this paper, natural frequency characteristics analysis of a micro-displacement structure with parallel flexible hinges is presented. The effects of each structure parameter to the natural frequency of the micro-displacement structure are simulation by dynamics modeling. The parameters can be divided into three categories, namely, parallel flexure hinges parameter, micro-displacement structure parameter and material parameter. Two micro-displacement structures using common materials are machined for frequency test. The test results of two micro-displacement structure verified the modeling analysis, and the natural frequency characteristics analysis in this paper can be referenced in micro-displacement structure design.
A Reliability Research on Internet of Objects Monitoring System of Facility Agriculture
Authors: Wang Hong Xiang , Xu H.B.
Published: May 2016

To solve the low transmission reliability in Internet of Objects monitoring system of facility agriculture, this study discussed the influences of transmission reliability in Internet of Objects. Meanwhile, the factors influencing transmission reliability of Internet of Objects were analyzed. Then, based on the results obtained, corresponding solutions were proposed. This research plays a guidance role in further improvement of reliability and function management level in Internet of Objects monitoring system.
Luggage Impact and Structure Optimization for Rear Seat Frame of Automobile
Authors: Wang Zhi Ping , Ni Jin Ting , Zhang Xin
Published: May 2016

It is essential that the back seat of a vehicle has to be designed safely and reliably and at the same time meet the ECE R17, as to reduce the back seat casualties in accidents caused by luggage impact. This paper studies a sample of back seat frame and establishes its precise CAD model. It adopts nonlinear finite element methodology to simulate the object under the ECE R17. The results reflect two problems. One is the force absorption and anti-deformation of the split seat frame is too weak; the other is the fixed connections linking the frame to the holder is not tight enough causing easy fall-off if being shocked. The test and simulation results suggest the following alterations, respectively to substitute the previous split seat frame for a one-piece seat frame as to improve the overall stiffness and anti-deformation, to adopt one-piece structure on the center support bracket and increases its thickness by 0.5mm, keep the remaining mounting bracket structure unchanged. The analyses of the improved program demonstrate its superior anti-deformation under the regulations.
Fault Diagnosis of the Foundation Brake Rigging System Based on Fault Tree and Bayesian Network
Authors: Wang Dan , Tian Ying , Wang Tai Yong , Ye Shi Feng , Liu Qiong
Published: May 2016

Based on the analysis of the advantages and limits of the traditional fault tree and Bayesian network in fault diagnosis, the method that building the fault Bayesian network based on fault tree is proposed in this paper. The paper introduces the correspondences between elements of the fault tree and the fault Bayesian network, also describes the inference process of the junction tree algorithm in the fault Bayesian network. Then with the foundation brake rigging system of CRH380AL EMU as an example, we build up the fault tree, complete its transmission to the fault Bayesian network, proving the superiority of the fault Bayesian tree in fault analysis of the complex system at last.
Research on Nonlinear Commutating Characteristics of Valve-Controlled Motor System Based on Hammerstein Model
Authors: Feng Yi , Qian Zhi Yuan , Lu Bao Chun , Zhang Deng Feng
Published: May 2016

Aiming at the low accuracy problem of linear model of Valve-controlled motor system in conditions of frequent start-stop and commutation, the nonlinear characteristics of the main components of valve-controlled motor system are analyzed, and non-linear mathematical models and simulation models are established to study the impact on the system of each nonlinear characteristic separately. Hammerstein model consists of a static nonlinear part and dynamic linear part connected in series is adopted, and the non-linear characteristics are introduced to the system. The multi-frequency sinusoidal input signal of test is used as the input of Hammerstein simulation model. And the simulation results are compared with test results and other model output, the results proved that the nonlinear characteristic impacts of the motor valve controlled system really exist, and Hammerstein model can describe nonlinear characteristics of the system accurately.
The Research of CAD Technique in Transformation of Education
Authors: Zhang Wo Bo , Zhang Rui Shan , Feng Zhan Ying , Shi Jian Guo , Liu Wen Guang , Chen Heng Chao
Published: May 2016

The CAD technique is an important way for training students with professional competence in vocational school course teaching. This article presents a way of education with the carrier of enterprise project through the combination and classroom teaching, which realizes the project teaching. In the innovative practice of vocational technology of CAD, we train applied talents according to the combination of engineering and learning. The general plans of learning content of students were made by the design ideas, where it realizes four-zero-docking and five-in-one idea .And then, the skilled talents were emerged. Furthermore, they also adapt to modern enterprises. In this article, we use gear oil pump, a teaching carrier of enterprise project, as an educational case to imply the scientificalness and innovativeness of the presented teaching methods.
Study on Torsional Excitation of Vibration Stress Relief Based on Lateral and Torsional Coupling
Authors: Huang Yuan Xing , Cai Gan Wei , Zhang Yong Wen
Published: May 2016

According to the engineering application of vibration stress relief (VSR) based on lateral and torsional coupling, the controlled single-phase series motor is used to create alternating electromagnetic torque, which excites the torsional vibration of the shaft. After adding the expression of the electromagnetic torque to the multi-dof dynamic equation of the lateral and torsional coupling, the dynamic response of lateral and torsional coupling can be calculated. The result has value in the application of VSR based on lateral and torsional coupling.
The Structural Design and Analysis of the New Type of Gripper
Authors: Shi X.H. , Wang Shou Cheng
Published: May 2016

The reason of lacking of a suitable front-end actuator when excavators moving massive objects, a new type of hydraulic engineering gripper was designed. Its design theory was showed. The use of SimulationXpress in the Solidworks to optimize the design, made the structure of cured rod more reasonable.
Dynamics Modeling and Simulation of Deployable Mechanism with Double Clearance
Authors: Huang Hong Zhou , Li Jun Lan , Yang Yun Qiang , Yan Shao Ze
Published: May 2016

Space deployable mechanisms have been widely employed in aeronautic industry, and the dynamic performance of the space deployable mechanisms become increasingly important. In this paper, the model of space deployable mechanism with double clearances is established by the multi-body program ADAMS. The deployable mechanism with ideal joint, single clearance joint and double clearance joints are simulated to investigate the effects of double clearance on the dynamic performance of the deployable mechanism. The results reveal that the coupler of double joint clearance has significant influence on dynamic performance of deployable mechanism. The results of simulation could help to predict the joint vibration in space deployable mechanisms.
Numerical Analysis for an Novel Hooke Hinge Based on ANSYS
Authors: Qi Xiao Qian , Hong Xue Wu , Zhao Jian , Xie Qing Sen
Published: May 2016

This paper utilizes SolidWorks to establish accurate Hooke hinge model and imports it into ANSYS using the data switching interface between SolidWorks and ANSYS. The stress-strain behavior of the Hooke hinge is analyzed using finite element method, and the reliability and stability of the structure is evaluated, which provides some theoretical guidance for the design of Hooke hinge.
Analysis of Vibrational Energy on the Pendulum Based on Finite Element
Authors: Luo Xin
Published: May 2016

Charpy impact test is very sensitive to mechanical processing technologies and product defects. Charpy impact test can give quantitative test data and improve the product quality of advanced manufacturing industry and the safety of the application of new materials. The Charpy impact test machine has elastic deformation. The center of percussion is different from the designed center of strike and this difference can affect the vibration energy on the pendulum. In this article, by using the finite element analysis method, we simulate experimental processes having different distance to the center of percussion and obtain the numerical quantity related effects. In the end, we verify the accuracy of the finite element analysis by using different energy level impact test.
The Vibration Features Analysis on Special Computer
Authors: Li Shi Jie , Wang Wei , Bi Hai Xia , Ma Yu Qiong
Published: May 2016

A certain type of special computer was studied as the institute in this paper. Through researching on the structure of the special computer box, use the Pro/E software to create the simplified model of the case, including computer cabinet, PCB, power and fan etc. Model analysis is conducted in the FEA environment ANSYS, attains ten order natural frequency and vibration mode. Dynamic load in the model is applied with half sine impact acceleration, and the resistance performance of the PCB which is the important components of the model is researched by the acceleration, speed and displacement response results obtained. Verify the installation method of vibration isolator can effectively improve the shock resistance of special computer.
Microstructure Prediction of 316LN Stainless Steel for Dynamic Recrystallization Based on Cellular Automata
Authors: Ji Hai Peng , Zhang Li Ge , Liu Jing , Wang Tai Yong
Published: May 2016

The established cellular automata model of dynamic recrystallization for 316LN simulated microstructure evolution of recrystallization nucleation and grain growth under different conditions. And on the basis of cellular automata model, the influence of strain, strain rate, deformation temperature on dynamic recrystallization behavior was analyzed. Though the hot compress experiment done on the Gleeble-3500 thermo mechanical simulator, combined with metallographic experiment, the microstructure at deformation temperature of 950 oC, 1050 oC and 1150 oC with strain rate of 0.001 s-1, 0.01 s-1, 0.1 s-1 and 1 s-1 was obtained. Simulation results are compared with metallographic microstructure, the error is small.
Research on Drilling of Ni-Based Powder Metallurgy Superalloys
Authors: Hui Wang , Guo Pei Quan , Qiao Yang , Niu Jin Tao
Published: May 2016

The application of Ni-based powder metallurgy superalloys materials was limited for its' difficult-to-machine, such as excessive tool wear, frequent tool change, short tool life, low productivity, and large amount of power consumption etc. So the studying of Ni-based powder metallurgy superalloys drilling process becomes extremely important. This paper mainly introduces the research status of drilling of Ni-based powder metallurgy superalloys materials and through synthesize considering cutting force and cost effective, we determined the optimal of cutting tool materials is carbide YG8 twist drill. The optimal parameters of drilling of Ni-based powder metallurgy superalloys: cutting speed of 15m/min, feed per tooth of 0.02mm/r. When the superalloys material is machined by standard twist drill, it is always appearing the failure modes of drilling.
A Numeric Investigation of Rectangular Groove Cutting with Different Lateral Micro Textured Tools
Authors: Wang Bin , Zhang Jia Yang , Wu Chun Ling , Deng Wen Jun
Published: May 2016

Micro textures on the tool rake face facilitate to improve friction conditions at the tool-chip interface, and therefore contribute to decreasing cutting force and cutting temperature. Literature has shown that lateral textures (perpendicular to chip flow direction) on tool rake face have better performance than other texture patterns. In this present study, the effect of different lateral micro textures on cutting force, cutting temperature and chip formation were analyzed via an advanced finite element analysis code in rectangular groove cutting processes. Three cutting tools with different lateral micro textures on tool rake face, one is parallel textured (MT1) and two are non-parallel textured (MT2, MT3), were employed in this study. The results indicate that lateral textured tools have significant advantages in terms of controlling chip curl, reducing cutting forces and decreasing cutting temperature. Synthetically, asymmetrical lateral textured tool MT2 show best performance in chip breakability control, decreasing cutting forces, and lower mean cutting temperature along the main cutting edge.
Analysis on the Friction and Wear Properties of Friction Stir Jointing for 7022 Aluminum Alloy Joining Region
Authors: Wang H.F. , Wang J.L. , Song W.W. , Zuo Dun Wen , Shao D.L. , Zhu Q.Q.
Published: May 2016

The friction and wear properties of the friction stir jointing 7022 aluminum alloy joining region were tested in this paper. The friction coefficients and wearing capacities of the joining regions under different joining process parameters were obtained. The experiment results showed that the friction coefficients and wearing capacities of the joining regions had a certain relationship with the hardness, but not became direct ratio relation. The friction coefficient of the joining region was smaller than that of the base metal. This main reason was base metal was lath-shaped grain, and the joining region was isometric crystal. The wear volume under 400/30 parameters was minimum. The wear volume was greatly influenced by the hardness of the joining region, but was not direct proportion relationship. Due to the random factors influence in friction process, the law of the friction coefficient reflecting friction and wear was not the same with the law of wear volume reflecting friction and wear. The friction form was abrasive wear and adhesive wear.
Experimental Study on Machinability of 2.25Cr-1Mo-0.25V Steel and Heavy Cutting Tool Life
Authors: Cheng Yao Nan , Qian Jun , Liu L. , Gong Ya Nan , Han Y. , Yan F.G.
Published: May 2016

2.25Cr-1Mo-0.25V steel is the material of key parts of major equipment in petroleum and chemical field. Aiming at its unworkability and low heavy cutting tool life, at first, the tool life comparative experiment of cutting 42CrMo steel, 2.25Cr-1Mo-0.25Vsteel and 45 steel was carried out. It was found that process ability of 2.25Cr-1Mo-0.25Vsteel was the worst, the second was 42CrMo steel. And the tool life of cutting 45 steel was 2 times more than that of 2.25Cr-1Mo-0.25Vsteel. Then the comparative experiment of different tool life of cutting 2.25Cr-1Mo-0.25Vsteel was made under the condition of heavy cutting. The service life of heavy cutting tool XF8 was significantly higher than that of YT15. At last, the factors affecting the service life of heavy cutting tool were analyzed, in order to provide basis for improving heavy cutting tool life of 2.25Cr-1Mo-0.25V steel.
Research on Cutting Force of Corner Milling of Inclined Plane
Authors: Wu Shi Xiong , Li Bin , Ma Wei
Published: May 2016

When milling corners in high speed, it will lead the mutation of cutting force that affects the processing quality and processing efficiency. In order to study the influence of milling parameters on milling force in the corner. Firstly, an orthogonal experimental of corner is designed to study the influence of various cutting parameters on cutting force. Axial cutting depth, radial depth, spindle speed and feed speed, as the major influence factors, impact on cutting force in corner milling. Then, a cutting force model of corner is established based on a method of orthogonal experiment linear regression. The significance test of regression equation and regression coefficient shows that cutting force model is accurate. The cutting force model is used to predict the cutting force, and then select the appropriate cutting parameters.
Simulation and Experimental Verification of W9Mo3Cr4V HSS Temperature Field in Cryogenic Treatment
Authors: Li Jun Ji , Yan Xian Guo , Zhang Hai Zhen , Li Dong Yang
Published: May 2016

In the cryogenic treatments process, the temperature distribution in a work-piece of high speed steel (HSS) is crucial to the effectiveness of the treatment. However, determination of temperature field during the cryogenic process is difficult. In this study, the temperature distribution in W9Mo3Cr4V HSS bars with a diameter of 24mm during cryogenic treatment was investigated using thermocouples so that obtained the optimization of process parameters and improve the high speed steel tool life. Temperatures at different nodes and their variations with time were measured and numerically studied using Pro/E, Workbench and Fluent software. Results from both the simulation study and experimental measurement are in good agreement, indicating that the temperature distribution inside a work-piece during cryogenic treatment can be determined using a combination of simple tests and numerical simulation, and finally provided a theoretical guidance for making the reasonable cryogenic treatment procedure.
Study on CNC Milling Heat and Residual Stress Relationship Model
Authors: Song W.W. , Wang J.L. , Wang H.F. , Zuo Dun Wen
Published: May 2016

In this paper, the effect of the cutting heat on the workpiece in the processing was studied. Its essence is to study relationship between the workpiece temperature variation and internal residual stress distribution. In the specific problem-solving process, the metal cutting theory, finite element related knowledge and metal elastoplastic deformation theory were combined, and established a mathematical model which was suitable for the model of the milling temperature and residual stress in the milling process. It would provide theoretical support for future study on milling deformation mechanism.
The Optimization of Process Parameters by Fixed Abrasive Pad for Lapping Magnesium Aluminate Spinel
Authors: Wang Zhan Kui , Zheng Yan Ling , Yao Jian Guo , Su Jian Xiu
Published: May 2016

The process parameters affect the lapping efficiency and the surface quality of work pieces. The fixed abrasive pad of w3-5 diamond abrasive was used for lapping magnesium aluminate spinel wafers in orthogonal experiment. The affection of lapping pressure, plate speed and slurry type on material removal rate (MRR) and surface roughness Ra were investigated. Finally, the process parameters were optimized. The results showed that lapping efficiencies were higher and the surface quality was better on the conditions of Zhongjing slurry, lapping pressure 10.37Kpa and plate speed 100rpm.
The Study of the Influence of Tool Wear on Cutting Temperature in Diamond Ultra-Precision Cutting of Aluminum Alloy Mirror
Authors: Zhang Yuan Jing , Dong Guo Jun , Zhou Ming
Published: May 2016

This paper performed a series of finite element method (FEM) simulation to investigate the influence of the tool wear on the cutting temperature in the diamond ultra-precision cutting of the aluminum alloy mirror. The two-dimensional FEM model including the diamond tool with the different average width of wear land on flank face was established. A series of ultra-precision cutting experiments using different cutting distance was performed. The tool wear was detected by scanning electron microscopy (SEM), and the cutting temperature was detected by infrared thermal imager. The comparison of the simulation investigations and the experimental investigations was done. The results revealed that the cutting temperature increases with an increase of the average width of wear land on flank face in the FEM simulation. And in the ultra-precision cutting experiments the diamond tool wear becomes severe as the cutting distance increases, meanwhile the severe tool wear results in the higher cutting temperature. Consequently the FEM simulations prove to be right.
Synthesis of Silicon Carbide Nanowhiskers from Graphite and Silica of Different Ratio by Microwave Irradiation Assisted Synthesis
Authors: Kahar Suhaimi Mat , Voon Chun Hong , Lee Chang Chuan , Lim Bee Ying , Md Arshad Mohd Khairuddin , Foo Kai Loong , Liu Wei Wen , Ruslinda A. Rahim , Hashim Uda , Adelyn Puah Ying Phing , Huda Abdul Rahman Nurul , Lee Hon Cheun , Rahman W.
Published: May 2016

In this paper, the effect of ratio of silicon dioxide and graphite for the synthesis of silicon carbide nanowhiskers by microwaves heating was reported. The mixtures of SiO2 and graphite with different ratio were prepared by ultrasonic mixing using ethanol as medium. The mixtures were dried on hotplate and cold pressed by using hydraulic hand press uniaxially into a pellet die. The mixture in the form of pellet were heated up to 1400 °C at heating rate of 20 °C/min and soaked for 30 minutes. Scanning electron microscopy was used to study the morphology of sample of each different ratio of mixture. It was found that almost complete conversion of graphite and silica to silicon carbide nanowhiskers was observed for sample of mixture SiO2 and graphite in the ratio of 1:3. Result from x-ray diffraction analysis also indicated that single β-SiC phase was present in the diffractogram of silicon carbide nanowhiskers synthesized from mixture SiO2 and graphite in the ratio of 1:3.