bluuebunny/crossref_metadata_2025 huggingface dataset:
Realising the Potential of MOOCs in Developing Capacity for Tertiary Education Managers
Authors: Nguyen Chinh , Davis Heather , Sharrock Geoff , Hempsall Kay
Published: May 2016

MOOCs are a recent development, with little informed consensus on the extent of their future impact on tertiary education. In this paper the authors consider one application of open online courseware, as a platform for professional development within the tertiary sector, with an agreed pathway into award programs in tertiary education management. The case presented is a recently launched ‘emerging leaders and managers program (eLAMP)' for the Australian tertiary education sector. The pedagogical, resourcing and practical issues of designing and supporting this program are examined as a means of exploring the conceptual underpinnings of online technologies and pedagogies.
Embodying Difference on YouTube
Authors: Ho Helen K.
Published: May 2016

This chapter analyzes the content and responses of a popular video, “Shit Asian Dads Say,” produced by YouTube production company JustKiddingFilms. In analyzing video content in conjunction with themes emerging from comments left in response to the video, the chapter discusses the ways in which comedic/satirical, citizen-produced content on YouTube helps to shape, construct, and reflect the boundaries of group membership. As the video hinges on second-generation performances of immigrant parenthood, its content provides a prime site to investigate how age, gender and race are performed and become contested or reified in digital space. An analysis of the YouTube videos grounded in the responses, commentary and discussion that accompany the videos in the user comments, ultimately empowers viewers' interpretations of digital creative expression.
Public History and National Identity
Authors: Andriakaina Eleni
Published: May 2016

In 2011, while the causes of Greek “crisis” started becoming the subject of public controversy, a documentary series aired on Skai channel vowing to challenge nationalist and populist accounts of the 1821 Revolution. By popularizing the main arguments of modernization theory, the “1821” documentary approached the past through the lens of “Cultural dualism” – the clash between a ‘reformist' and an ‘underdog' culture – and operated as a metaphor for contemporary Greece. Via the study of the media spectacle and the ways the history of 1821 goes public, historical inquiry can reflect on the normative/descriptive complex of rival historical narratives, exercise itself in perspectival seeing and self-reflexivity and move towards a history of the present.
We All Scream for Ice Cream
Authors: McLaughlin Bryan , Hull Shawnika , Namkoong Kang , Shah Dhavan , Gustafson David H.
Published: May 2016

In the United States, women with breast cancer often find their identity confined by a sociocultural context that encourages them to adopt an overly optimistic outlook while hiding signs of their physical illness. Online social support groups offer a promising venue for breast cancer patients to take control of their self-definition and connect with individuals going through similar experiences. During the analysis of discussion board posts for an online breast cancer support group, ice cream unexpectedly emerged as a central component of group discussions. This included frequent sexual jokes about the deliverymen that brought the women ice cream. A grounded theory analysis revealed that ice cream symbolized the pursuit of everyday, physical desires, which allowed group members to construct a joyful, but forthright, shared identity. This paper demonstrates how online support groups can enable individuals facing a health crisis to use seemingly trivial symbols to take control over their self-definition.
Digital Money and Electronic Check Security
Authors: Balasubramanian Kannan
Published: May 2016

Digital money represents a new payment instrument for e-commerce. More than any other payment instrument, it demands development of a variety of new security techniques for both macro and micropayments. This chapter gives an overview of selected mechanisms for securing digital money transactions. This chapter deals with signature mechanisms using Cryptography. The reader is asked to refer to the Digital signature Standard (DSS) (nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.186-4.pdf) for an introduction to Digital Signatures.
Developing Security Enabled Applications for Web Commerce
Authors: Balasubramanian Kannan
Published: May 2016

As more and more applications find their way to the World Wide Web, security concerns have increased. Web applications are by nature somewhat public and therefore vulnerable to attack. Today it is the norm to visit Web sites where logins and passwords are required to navigate from one section of the site to another. This is much more so required in a Web application where data is being manipulated between secure internal networks and the Internet. Web applications, no matter what their functions are, should not exchange data over the Internet unless it is encrypted or at least digitally signed. Security should be extended to the private-public network borders to provide the same authentication, access control, and accounting services that local area network (LAN) based applications employ. The most widely used method of Web application security today is Private Key Infrastructure (PKI). Various examples of PKI implementations are examined.
Prevention of SQL Injection Attacks in Web Browsers
Authors: Balasubramanian Kannan
Published: May 2016

Applications that operate on the Web often interact with a database to persistently store data. For example, if an e-commerce application needs to store a user's credit card number, they typically retrieve the data from a Web form (filled out by the customer) and pass that data to some application or script running on the company's server. The dominant language that these database queries are written in is SQL, the Structured Query Language. Web applications can be vulnerable to a malicious user crafting input that gets executed on the server. One instance of this is an attacker entering Structured Query Language (SQL) commands into input fields, and then this data being used directly on the server by a Web application to construct a database query. The result could be an attacker's gaining control over the database and possibly the server. Care should be taken to validate user input on the server side before user data is used.
Quantum Cryptography
Authors: Abbas Ahmed Mahmoud
Published: May 2016

Quantum cryptography is known the most up-to-date in domain of realistic cryptography notably the menace of quantum cryptanalysis which threatens security firmness of public key cryptography. Quantum cryptography has a famous scheme known as Quantum Key Exchange (QKE), that administrates generation and distribution of a secured random key between legitimate channel users depicted as sender and receiver. Consequently, such key could be used as a key for one-time pad hybrid cryptosystems to encrypt and authenticate messages over a quantum channel. (QKE) is based on unifying quantum physics concepts and information theory with conventional cryptographic schemes that target to produce a short secret session key between any two legitimate parties. An important phase in key creation of BB84 protocol is Privacy Amplification phase where two interconnecting parties distill highly secret shared key from a larger body of shared key, which is only partially secret. The two legitimate parties publicly exchange information to create a compressed key free from biased bits known by an eavesdropper.
Real World Collaborative Projects Increasing Self-Directed Learning in Online Master's Programs
Authors: Courduff Jennifer , Cannaday Jessica
Published: May 2016

College students learn effectively when they engage in academic materials and make meaningful connections with faculty and peers, applying information as it is learned. Although there is much research on the undergraduate student experience, the experience of adult learners in graduate programs is sparse. Adult students are a growing presence on college campuses and it is expected that the number of adult learners will continue to increase. This chapter provides foundational information to teaching adult learners in the online format. Theoretical constructs of andragogy and self-directed learning are reviewed and applied to real-life examples of successful collaborative learning activities in the online environment. Discussion questions are provided to promote the application of chapter content to the instructional environment of the reader.
A Model of Designing Online Assignments Based on the Revision of Bloom's Taxonomy
Authors: Tao Congwu
Published: May 2016

Online assignments play an important role in online teaching and learning, and the revised Bloom's Taxonomy has been proved to be valuable for real teaching and learning. But few research efforts are put into combining online assignment design with the revised Bloom's Taxonomy. This chapter is to propose a model of designing online assignments based on the revised Bloom's Taxonomy, which can be used as a guide for online instructor to design a comprehensive online assignment with helping the students to master the four types of knowledge–factual knowledge, conceptual knowledge, procedural knowledge and metacognitive knowledge–and at the same time help the students develop the six-stage cognitive process.
An Energy-Related CityGML ADE and Its Application for Heating Demand Calculation
Authors: Bruse Marcel , Nouvel Romain , Wate Parag , Kraut Volker , Coors Volker
Published: May 2016

Different associated properties of city models like building geometries, building energy systems, building end uses, and building occupant behavior are usually saved in different data formats and are obtained from different data sources. Experience has shown that the integration of these data sets for the purpose of energy simulation on city scale is often cumbersome and error prone. A new application domain extension for CityGML has been developed in order to integrate energy-related figures of buildings, thermal volumes, and facades with their geometric descriptions. These energy-related figures can be parameters or results of energy simulations. The applicability of the new application domain extension has been demonstrated for heating energy demand calculation.
OPAC Usability Problems of Archives
Authors: Chung Ada Chi Wai , Chiu Dickson K. W.
Published: May 2016

This study aims to explore common pitfalls of design and functional issues of Open Public Access Catalogue (OPAC) systems for archives for the general public and suggest solutions to approach such problems. Other than general users, this study also suggests ways to enhance the OPAC system to make it more user-friendly to users with special needs, such as the elderly and children. This paper uses a case study approach to evaluate the usability of the OPAC system in the Hong Kong Film Archive (HKFA), which is a representative and important archive of its type. The paper provides practical insights on common pitfalls of design and functional issues of OPAC for archives under such context (such as searching user-friendliness) and suggests technical solutions (such as Web 2.0 and more user friendly input devices) to approach such problems. Although we carried out this usability study mainly based on observation without direct interaction with their target users, we already discover adequate and significant problems for the discussions and suggestions in this paper. The paper includes implications and suggestion for archives to improve the usability and functionality of their OPAC systems, which is a key to their public services. Recently, implementing public Web-based access to archives has become popular. However, there are just few usability studies on such OPAC systems, especially for archives facing the general public instead of just professionals.
Optimization of Construction Cost Using Industrial Wastes in Alternative Building Material for Walls
Authors: Madhusudanan Swetha , Amirtham Lilly Rose
Published: May 2016

Building materials constitute about 60%-70% of the total cost of construction. Reduction in the use of conventional materials may not be possible; therefore, an alternative solution to use low cost materials would reduce the overall construction cost of a building. Industrial wastes, when recycled and reused as a building materials, not only aid in overcoming disposal problems, but also conserve natural resources, decrease energy use, and reduce pollution caused during manufacturing processes, and consequently reduce greenhouse gas emissions. Materials such as Copper slag, Phospogypsum and Fly ash, when used as supplements for sand and coarse aggregate in the manufacture of wall materials, reduce the cost of construction considerably. Additionally, construction of buildings using these materials leads to more energy efficient buildings and can gain additional weightage (points) in Green building certification.
The aim of this paper is to highlight the cost reduction in using alternative wall material for construction, through detailed analysis in an apartment building in Chennai, Tamil Nadu, India. A comparative study between the different materials used such as, bricks, fly ash blocks and Alternative blocks made of industrial waste (Madhusudanan 2015)) were taken into consideration to assess the unit cost of each material. Similarly, a study of the cost performance between a load bearing structure and a framed structure was made, and it was found that the overall construction cost has a greater impact for a load bearing building when compared to a framed structure.
A Comparative Study on Thermal Insulation Properties of Partial Replacement of Fine Aggregate by E-Waste Material (FR-4) in M30Grade with Conventional Concrete
Authors: Dhanraj A.A. , Selvamony C.
Published: May 2016

The purpose of this experiment is to analyze the steady state condition in a concrete slab. Temperature measurements were made for each scenario and were used along with physical dimensions to compute various heat transfer parameters. In this paper, the investigation was made by the partial replacement in the coarse aggregate with E-waste (PCB cutting waste) (FR-4) in the conventional concrete. The durability test such as compressive strength test, split tensile and flexure strength were made and the results analyzed. The investigation is made by casting slab panels of various thickness (1’ x 1’ x 0’-2”, 1’ x 1’ x 0’-4”, 1’ x 1’ x 0’-6”, 1’ x 1’ x 0’-8” & 1’ x 1’ x 0’-10”) with same area and different temperature. These panels were allowed for curing of 28 days and tested in a closed chamber. The heat was transferred from one part of chamber to another chamber through the slab element. Then the heat transformation and U-factor will be calculated and the insulation properties of the e-waste concrete with conventional concrete
Experimental Studies on Strengthening of Reinforced Concrete Beams Using Ferrocement Wraps for Energy Efficiency
Authors: Vijayalakshmi M.M. , Vijayalakshmi A.
Published: May 2016

Construction industry is a major consumer of energy and resources, which has an impact on the environment. Ferrocement construction technology is becoming popular throughout the world. Ferrocement is a thin element used for building construction and also for retrofitting, because it can be applied quickly on the surface of the damaged structural element without the requirement of any special bonding material. It requires less skilled labour when compared to other retrofitting solutions existing at present. This paper deals with the study of performance of ferrocement wrapping in strengthening of RC beams. The ferrocement construction has an edge over the conventional reinforced concrete material because of its lighter weight, ease of construction, low self-weight, thinner section and high tensile strength which makes it a favorable material for prefabrication also. Experimental work is carried out for beam having dimensions 250mm x 125mm x 3000mm, to investigate the behaviour of reinforced concrete beams retrofitted with ferrocement to increase the strength of beams in both shear and flexure. Three reinforced concrete beams are casted in order to study different parameters such as strength, stiffness, stability and ductility. M25 grade concrete and Fe 415 steel is used. Beam is designed as per IS : 456-2000 code of practice. The mix design is done as per code IS : 10262-2000. The experimental result concludes that ferrocement technology is the best solution in strengthening of Reinforced Concrete beams to meet the demand in an efficient and economical way for sustainable development.
Recycling of Fly Ash as an Energy Efficient Building Material: A Sustainable Approach
Authors: Arif Kamal Mohammad
Published: May 2016

Fly Ash, known for its proven stability for variety of applications as admixture in cement, concrete, mortar, lime pozzolan mixture (bricks. blocks) etc, is an industrial by-product from Thermal Power Plants with current annual generation of approximately 108 million tones. Fly Ash is not just environment friendly, but is known for its cost effectiveness as well. Its use as a building material helps increase buildings strength and stability. Fly Ash is believed to be a very promising alternative for the industry seeking to meet its development objectives. Fly Ash is being very effectively and economically used in building components such as bricks, doors, door-frames, etc. Fly Ash is also being used in construction of roads and embankments with some design changes. It is also used as raw material in agricultural and wasteland development programmes. The trend is clear, Fly Ash will soon be considered as a resource material and its potential will be fully exploited. Through development & application of technologies, Fly Ash has shifted from “Waste Material” category to “Resource Material” category. The purpose of this paper is to provide an overview of disposal and utilization of Fly Ash and its beneficial potential in application of civil engineering construction as well as others. The focus of this paper is to explore the properties of fly ash as building materials and also aims at the properties of geopolymer concrete, how these distinguish from general characteristics of ordinary Portland cement. It also lay emphasize on durability, properties of fly ash based geopolymer concrete and its advantage when used as a construction material as well.
Simulation of Various Wall and Window Glass Material for Energy Efficient Building Design
Authors: Gorantla Kiran Kumar , Shaik Saboor , Puttaranga Settee Ashok Babu Talanki
Published: May 2016

Buildings consume huge amount of energy for forced ventilation and artificial day lighting. Use of appropriate material combinations for walls and window glass can help in reducing energy consumption for cooling and lighting. This paper presents the thermal properties of four building materials such as, laterite stone, dense concrete, burnt brick and mud brick. It also presents the experimentally measured optical properties of glass materials such as, clear glass, bronze glass, green glass and reflective. In this study building of size 5m X 5m X 3.2m with four wall materials and four glass materials were designed using design builder software. The thickness of the wall was considered as external wall with thickness 0.22m. All the walls covered with cement plaster on either side. Roof of the building is made of reinforced cement concrete and floor is dense concrete. Thermal analysis was carried out using by Energy plus software. Single sized glass windows were placed in south direction (Due to less heat gain in south direction) for Mangalore city (12.870N, 74.880E), Karnataka, India. Different window to wall ratios (20%, 40%, 60%, 80% and 100%) were maintained for buildings. Total eighty building models were investigated for heat gain into buildings. From the results, it is observed that irrespective of the window to wall ratio, mud brick walls with reflective window glass were observed to be energy efficient from the lower heat gain point of view, and laterite stone wall building with clear glass windows were observed to be the worst due to their higher heat gain values. At 60% window to wall ratio mud brick walls with reflective window glass have 24.93kWh heat gain and dense concrete walls with clear glass have 32.9 kWh heat gain. The results of the study help in establishing the best combination of wall and glass materials for minimum heat gain into buildings.
Experimental Optimization of Process Parameters for Turning TC11 Titanium Alloy Using Taguchi Methodology Design
Authors: Chen Su Lin , Shen Bin , Sun Fang Hong
Published: May 2016

This paper presents a study of the influence of cutting conditions (cutting velocity, feed, cutting depth and lubrication) on turning TC11 (Ti-6.5Al-3.5Mo-1.5Zr-0.3Si) titanium alloy. Taguchi methodology design was adopt for carrying out experiments. Turning process parameters such as cutting speed, feed rate and depth of cut were varied to study their effect on process responses such as cutting force (Ft), surface roughness (Ra) and temperature on cutting zones (T). Minimum quantity lubrication (MQL) technology was adopt to increase the lubricating and cooling effect. Meanwhile, CVD diamond coating was deposited on the cemented carbide insert to reduce its friction with workpiece and increase its wear resistance. From the analysis of orthogonal tests, depth of cut contributes the most for the main cutting force and cutting temperature, while feed rate had the most significant effect on surface roughness on the workpiece. MQL can reduce the cutting temperature at the cutting zones, especially for the uncoated cutting inserts whose temperature decreases by an average of 60~80°C. The cutting force, surface roughness and cutting temperature of CVD diamond coated inserts were all higher than those of uncoated tools, especially with MQL lubrication. Considering the cutting efficiency and cost, the optimal parameters in the turning process of TC11 for minimizing the cutting force, surface roughness and cutting temperature are obtained as Vc=115m/min, f=0.08mm, ap=0.5mm under MQL lubricating with uncoated cemented carbide as the cutting tool.
Modeling Material Removal Rate of Heavy Belt-Grinding in Manufacturing of U71Mn Material
Authors: Wang Rong Quan , Li Jian Yong , Liu Yue Ming , Wang Wen Xi
Published: May 2016

The heavy belt-grinding is a new machining method, which combined the characters of heavy-duty grinding and belt-grinding together, with high efficiency and low cost. In the present paper the removal rate model of heavy belt-grinding in manufacturing of U71Mn steel is established. It is assumed that the distribution of the abrasive particles protrusion height of the abrasive belt surface closes to Gaussian distribution. The model is presented by calculating the removal volumes of all abrasive grains contributing to cutting action based on the probability theory, elastic-plastic mechanics and abrasive cutting theory. It is analysis that the material removal rate depends essentially on the mechanical properties of the workpiece and the belt and the grinding conditions. It is proportional to the average pressure, belt velocity and the indentation depth and is inverse proportion to the grain size.
Research on Dental Ceramic Grinding: A Review
Authors: Zhao Dan Na , Wang Cheng Yong , Mao Xue Li
Published: May 2016

Dental ceramics has become dominant materials used in dental restorations. Dental ceramics have several advantages, such as stable performance, good bio-compatibility, little possibility to attach plaque, and similarity to the color of permanent tooth. However complex surface characteristics and hard and brittle properties of dental ceramic materials caused difficulties in the processing and subsequent grinding. The complicated craft and high failure rate of dental ceramics greatly limit its wide application in clinical. Thus, fully understanding the special cutting tools grinding performance and researching the material damage process caused by grinding temperature and grinding force are of great significance. Research on dental ceramic grinding was reviewed in this paper. The removal mechanism of dental ceramic materials and the influence of parameters settings on the grinding force, grinding temperature, and the surface quality have been studied. Besides the existing problems in dental ceramic grinding technology were pointed out.
Research on the Influence of Tool Wear on Cutting Performance in High-Speed Milling of Difficult-to-Cut Materials
Authors: Zhu Zhao Ju , Sun Jie , Lu Lai Xiao
Published: May 2016

A series of research on the interactions among tool wear, cutting force and cutting vibration were conducted through high speed milling experiment in this paper, which objected the titanium alloy as difficult-to-cut materials. The results showed that the increasing of tool wear led to enlarging the cutting force and cutting vibration; and vice versa, the increasing of cutting force and cutting vibration aggravated the tool wear in the process of machining. Besides, the variation trend of tool wear with cutting was similar to the trend of cutting force, while the variation trend between cutting vibration and tool wear was different. Especially in the sharply cutting tool wear stage, the influence of tool wear on cutting vibration became more complicated.
Self-Sharpening Failure Characteristic of a Si3N4 Ceramic Tool in High Speed Cutting of Inconel 718
Authors: Zheng Guang Ming , Zhao Jun , Cheng Xiang , Wang Min
Published: May 2016

A Si3N4 ceramic tool material with high mechanical properties was fabricated by hot-pressing sintering process. The high speed machining of Inconel 718 tests were carried out with round ceramic inserts. The failure surface and microstructure were analyzed by scanning electron microscopy (SEM) to reveal the ceramic tool failure mechanisms. The results showed that the main failure mechanisms of the Si3N4 ceramic tool were flaking, micro-chipping, abrasive wear and adhesive wear in the turning process. On the other hand, chipping, flaking and adhesive wear were the main failure reasons in the milling process. Meanwhile, some small flaking along the cutting edge and step-shaped flaking on the rake face closed to the cutting edge were found on the failure surfaces, which was a typical self-sharpening failure characteristic of the ceramic tool in the high-speed cutting process. This tool failure evolution characteristic of the ceramic tool can be attributed to its higher flexural strength and fracture toughness, which was beneficial to improve the tool life and was constrained by cutting conditions.
The Influence of Bionic Micro-Texture’s Surface on Tool’s Cutting Performance
Authors: Xie Feng , Lei Xiao Bao
Published: May 2016

Related researches of bionic tribology indicate that reasonable bionic micro-texture’s surface has a good effect on tool’s anti-friction property. In order to study bionic micro-texture effects on tools’ cutting performance further, in this paper groove and scallop micro-texture are made out on the surface of carbide tool with laser processing technology. Then orthogonal cutting tests are made to cut steel 45 in dry or wet cutting with different feedings. The results show that cutting forces can be effectively reduced by the cutting tool with micro-texture’s surface. Especially, the micro-texture’s tool has the best effect when the direction of grooves is vertical to the direction of chip’s motion, and the wear degree of its rake face is also slighter. All of those will be helpful to guide the design of cutting tool.
Wear Mechanisms of Hard-Brittle Material Tools in High-Speed Machining of Powder Metallurgy Material
Authors: Ding Zhi , Han Jiang , Yang Hai Dong
Published: May 2016

A series of experiments was conducted in high speed machining of powder metallurgy material with PCBN tools. The main tool wear mechanisms were discussed by observing tool wear morphology utilizing scanning electron microscopy (SEM) and detecting the element distribution of the worn tool surface using energy dispersive spectroscopy (EDS).The experimental results indicate that fragile breakage occurred before it reached its blunt standard in high-speed machining of powder metallurgy material with PCBN tools,and the tools wear mechanisms are synergistic interaction among mechanical wear,binder wear and chemical wear.
A Kind of Vibration Sensor and Testing System in Electromechanical Equipment Based on Fiber Bragg Grating
Authors: Jiang Qi , Guo Teng Yun
Published: May 2016

Mechanical vibration analysis is an important index to measure the running state of the electromechanical equipment. The vibration signals contain the information about the equipment running state. This paper studies and designs the vibration monitoring system based on fiber Bragg grating (FBG). Through the finite element analysis simulation, optimizes the sensor's structure, and uses the labview software to compile the corresponding vibration monitoring analysis software. Finally verifies the detection effect of the monitoring system, through the pulse signal and continuous signal dynamic experimental analysis. The result of the experimental analysis shows: this vibration monitoring system can monitor the vibration information and analyze vibration state effectively. It has the advantages of reducing the temperature interference and lateral disturbance, and detects the vibration of three direction at the same time. So it is feasible to monitor the electromechanical equipment.
A Structure of Cloud Test System for Signal Test
Authors: Ding Chao , Tang Li Wei , Deng Shi Jie
Published: May 2016

The Automatic Test System (ATS) is being increasingly used in the business and professional test. However, there are some potential problems emerged in the application of the distributed test. So we intend to solve the problems by adopting the idea of the Cloud Computing to solve the two challenges: improve the efficient use of the limited and heterogeneous hardware test resources and shorten the test cycle which is defined as the whole time of the test. The paper proposes several structures of the Cloud Test System (CTS): the overall structure, the software and hardware architecture. Theoretically,the study overcomes the challenges of the existing test system, then the foundation of the further study is laid.
One Abstraction Method for Displacement Response in the Sweep-Frequency Testing of Rotating Spindle
Authors: Guo Yu Zhu , Chen Tian Ning , Wang Xiao Peng , Xu Yan Fei
Published: May 2016

ion Method for Displacement Response in the Sweep-Frequency Testing of Rotating Spindle
Guo Yuzhu1,a*, Chen Tianning1,b, Wang Xiaopeng1,c and Xu Yanfei11 State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, 710049 Xi’an, China
aguoyuzhu@126.com, btnchen@mail.xjtu.edu.cn, cxpwang@mail.xjtu.edu.cn
Keywords: Rotating spindle; Sweep-frequency measurement; Error separation.
Abstract. In the measurement of motorized spindle dynamic performance, the non-contact sweep-frequency excitation is adopted to obtain the displacement response of spindle rotor under high speed rotating. Due to the shape error at measurement section, eccentric error and random vibration, the illusory signals is introduced to the practical measured signal, which makes it difficult to analyze the displacement response. To effectively separate the error, a new method combining template signal and slip filtering is presented. After analyzing the characteristics of displacement response and illusory signals in time-frequency domain, the template signal constructed by the non-superposing portions between response and error is employed to eliminate the error in superposing portions. And a band-pass filter which can slip in time-frequency domain is employed to eliminate the other error. A spindle of CNC milling machine is tested at 7000 r/min, and the analysis result shows that the displacement response can be abstracted successfully from the original signal measured by rotating spindle.
Study on the Relation of Wheel Hub Bearing Preload and Natural Frequency by Dynamic Test
Authors: Wang Zhi Gang , Weng Ze Yu , Cao Qi Peng , Mei Jin Hu , Zhu Fu Hong
Published: May 2016

Preloads have an important influence on working performance and service life of wheel hub bearing. In order to study the action mechanism, carrying out the study on the effect of wheel hub bearing preload on the natural frequency is particularly important. Aiming at a certain type of car wheel hub bearing, the wheel hub bearing swept-sine vibration test system is built, and the conclusion is got after testing on wheel hub bearings with different preloads. The conclusion is that the natural frequency of wheel hub bearing increases with preload increasing, but increasing trend tends to slow.
Improved Design of Driller Based on the Variable Drilling Speed Damping Mechanism
Authors: Wang Dao Lin
Published: May 2016

To improve the driller design using the variable drilling speed technology, by attaching to the cam gear mechanism on the driller spindle, adding a mandatory axial vibration to the driller. The vibration of the drilling speed at a certain waveform and within the scope of a certain amplitude of periodic change, in order to achieve the purpose of reducing the radial drill cutting chatter, ensuring processing quality of hole. Based on variable ​​cutting speed technology and the use of vibration damping mechanism, a variable speed apparatus and a cam gear are attached to achieve a vibration damping, to improve hole drilling parts dimension, shape and position of the precision of the accuracy.
Technology of Online Inspection in CNC Machine Tool
Authors: Yu Zhi Qiang , Wang Tai Yong , Wang Yong , Li Hong Bin , Wang Yu Long , Chen Yang
Published: May 2016

In this paper, an online inspection system is developed based on TDNC-H8 open CNC system. The system includes motion control, program management, the preservation and processing of the result and other functions. To check the rationality of inspection route, optimize and modify the inspection program, avoid accidental collision, online inspection simulation function is developed with Visual C++ programming tool and OpenGL graphics library.
Analysis of the Milling Acoustic Signal Using Wavelet Decomposition
Authors: Wang Tong Yue , Sun Q.P.
Published: May 2016

Vibration has a great influence on the cutting process and it can be detected by many signals. In this work, a set of experiments are conducted on Mikron UCP810 DURO high speed milling center with Fraisa carbide end mill for milling 2A12 aluminum workpiece, an acoustic method is used to detect the milling signals. The captured sound signals are analyzed using Matlab Daubechies5 wavelets with six levels of decomposition, the detail and approximation of the sound signal components are obtained. The analysis results demonstrate the relationship between the signal and the vibration.
2-D Defect Profile Reconstruction from Ultrasonic Guided Wave Signals Based on Radial Wavelet Basis Function Neural Network with ELM
Authors: Liu Bing , Tang Li Wei , Yu Xin Feng , Wang Jian Bin , Li Ai Hua
Published: May 2016

The reconstruction of defect profiles based on ultrasonic guided waves means the acquisition of defect profiles and parameters from ultrasonic guided wave signals. To achieve multi-resolution approximation, this paper proposed a reconstruction approach based on Radial Wavelet Basis Function Neural Network (RWBFNN), which combines wavelet analysis and neural network. Gaussian radial basis functions and Mexican hat wavelet frames are used as scaling functions and wavelet functions respectively. The training and testing samples contain simulation data and experimental data. The input data sets are defect echo signals, and the output data sets are 2-D profile parameters. To reduce the training time and simplify the profile reconstruction procedure without losing accuracy, Extreme Learning Machine (ELM) is adopted simultaneously. The results indicate that significant advantages can be obtained over other defect profile reconstruction schemes, and the accuracy of the predicted defect profile can be controlled by the resolution of the network with the lower computational complexity.
Design for New Gear Measuring Centers
Authors: Wang Xiao Sheng , Liu Xue Bin , Zhao Wei
Published: May 2016

For existing disadvantage in gear measuring instruments, such as single measure, complex operation, expensive, and so on, in the paper primary and secondary coordinate system are established based on the theoretic of positioning coordinates and gear, then the introduction of feedback measuring device can be integrated in the design of a manufacturing new gear during the measurement center.
Design and Implementation of DSP Based Cross-Platform Material Scratch Test Control System
Authors: Song Zhi Hui , Jing Lu Yang , Zhang Pan , Sun Jian , Liu Qiong
Published: May 2016

Scratch test is mainly used for quantitative measurement of mechanical properties of coating materials in the field of modern materials testing. Advanced materials research have higher accuracy and stability requirements for scratch device but the control system the device mainly use can’t achieve dynamic and fast scratch because of the slow feedback. This paper designed a cross-platform material scratch test control system based on DSP data transmission and multi-axes control technique. System integrates good dynamic response sensors and advanced piezoelectric ceramic feed system, implements multi-axis synchronous control through the motion controller and running state monitoring through the DSP module .Adopting the standard PCI interface and cross-platform software development, the system has good portability.
Research on a Type of Program-Controlled Three-Dimensional Vibration Platform
Authors: Tian Ying , Liu Qing Jian , Zhang Lei , Tian Song Ling , Li Peng Lin
Published: May 2016

Conventional mechanical vibration platform vibrates not only in the direction of back and forth but also in the direction of up and down. Vibrations in both directions are achieved by two mechanisms, respectively. Three-dimensional vibration cannot be realized. In this paper, the servo motor, the gear drive mechanism, and the parallel four-bar linkage mechanism are combined with the NC system. And a type of program-controlled three-dimensional vibration platform is designed. The platform can vibrate in three directions, such as the directions of up and down, left and right, back and forth. The parametric adjustment of amplitude and frequency in three directions can be realized. The vibration platform is suitable for high-speed and light-load three-dimensional vibration. Compared with the existing mechanical vibration platform, the designed vibration platform overcomes some deficiencies to realize three-dimensional vibration with variable frequency and amplitude.
Research on High-Speed Linking Algorithm of Continuous Small Blocks
Authors: Ye Bai Sheng , Zhang Li Qiang
Published: May 2016

Aiming at the corner connection speed of continuous small blocks caused by their angle influences, the speed of transition is low and easy to cause vibration of machine tool. Research on the mathematical model of constant-speed linking of multiple periods is established by using the arc to smooth continuous small blocks, combined with the transition’s geometrical constraint, motion constraint, parameter calculation, the theory is to realize the method of high-speed interpolation of constant-speed linking of multiple periods. The result reveals that the effectiveness and practicability of the proposed method.
Modeling and Simulation of Regenerative Braking Performance of Electric Vehicles Based on Decoupling Strategy
Authors: Xiao Ping , Lou Jie , Niu Li Min , Gao Hong
Published: May 2016

In order to enhance energy recovering efficiency of regenerative braking system of electric vehicles (EV), coupling mechanism and decoupling method between braking system and charging system were studied. First, coupling-relation mathematical model between braking system and charging system of EV were built. On this basis, decoupling method was studied and mathematical model of decoupling was built as well. Furthermore, simulation model of EV was built, based on redeveloping the simulation software of ADVISOR. Finally, simulation of regenerative brake of EV was carried out under different working conditions. The results indicated that energy-recovering efficiency of EV based on decoupling strategy was better.
NC Manufacturing System Based on Multi-Agent Programming
Authors: Pang Jun , Wang Xian Bing , Peng Jin
Published: May 2016

Numerical control (NC) programming is the critical part for the NC manufacturing system. The NC manufacturing programming is the concentrated reflection of design of component-processing, which reflect directly the productive efficiency of NC manufacturing and the quality of products. This paper suggests that the Multi-agent as the theoretical basis and development platform to research the NC programming based on agent, in order to reach the autonomy of programming unit, the NC programming unit based agent as its the processing object, and self-organization of system. The NC programming based on Multi-agent can achieve the autonomy and functional maturation of each programming sub-unit, and can also achieve the coordination and cooperation among all the dependent units, therefore, the system processes the self-organization ability. One standard process template is created relay on this technology, in order to templatize and intelligentize the process flow and process data of NC manufacturing.
The Research of Circular Interpolation Motion Control Based on Rectangular Coordinate Robot
Authors: Shi Xiu Min , Fei Wei Jie , Deng San Peng
Published: May 2016

The high-speed pulse outputs of PLC can control motion of stepper motor or servo motor. So PLC can complete interpolation function which CNC can do using a kind of simple algorithm. What’s more, the PLC can be developed to be a controller of economical CNC machine tools.
Based on the experiment platform of modern robot industrial, the paper introduced how to control the motion of servo system by PLC in detail, and completed the two-dimensional interpolation program through PLC using the direct target tracking as interpolation algorithm. The direct target tracking algorithm could form a series of micro straight line segments approach the desired interpolation trajectory through directly calculating a series of minimum interval points on the interpolation line and connecting these points end to end. Compared to the single pulse interpolation, the direct target tracking algorithm simplified interpolation algorithm and adapted to the PLC program, so it is suitable to economical CNC system. By programming and running in the experimental platform, it can achieve better results using the direct target tracking method as interpolation procedures.
The Development of the Synchronous Control Technology on Four-Channel Lifting Device
Authors: Yu Ai Wu , Zhu Chuan Min
Published: May 2016

Motor synchronous control technology has been widely used in lifting device. The effect of Synchronous control technology to improve the precision is becoming more and more attention both at home and abroad. Based on the four channels winding ascension, we design a deviation coupling based on principle of displacement compensation control system, and use Matlab/Simulink for simulation, and research the influence law of different parameters on synchronization control accuracy. The simulation results confirmed that the strategy can satisfy the control precision. Finally, we set up the experimental system to verify the feasibility and practicability of the synchronous control system.
Research of Mass Redundant Data Deleting Algorithm for Intelligent Manufacturing Process
Authors: Song Long Long , Zhang Pan , Wang Tai Yong , Xu Lei , Song Xiao Wen
Published: May 2016

Information management systems become more common and more important in all walks of life. Many serious problems such as multi-source information heterogeneity, mass redundant data, and data security occur in the systems as the explosive increment of data. A novel redundant data deleting algorithm based on the cloud storage platform was proposed in this paper to deal with the problem of mess data storing. Storage space division algorithm and different users were divided in an appropriate way to improve the efficiency of reading and writing. A typical information management system was used to verify the feasibility and effectiveness of the algorithms proposed in this paper.
Research on PLM-Oriented Product Design Evaluation Based on User Experience
Authors: Li Xiao Na , Liu Heng Li
Published: May 2016

With the rapid development of experience economy, manufacturing should provide products and services which can satisfy the users. The product design evaluation methods and the relationships with PLM were studied. The research actuality and deficiency of product user experience were analyzed. To solve the problems which product design evaluation cannot be implemented throughout the whole product life cycle and user experience cannot guide design evaluation, product development process was divided into four stages based on the product lifecycle management. The design evaluation requirements for every stage were researched, the evaluation contents were analyzed with user experience methods, and the evaluation targets and missions were summarized. So the model of PLM-oriented product design evaluation system based on user experience was established. It proposed the direction of future research, and wished to guide the development of PLM-oriented product design.
Research on the Coaxial Connection between Gas Flowmeter and Critical Flow Venturi Nozzle Gas Flow Standard Device
Authors: Zhen Yang
Published: May 2016

As an important measurement instruments of trade metering, gas flowmeter has been more and more widely used, and the quantity value transfer of the flow meter is becoming increasingly significant. In order to realize the accurate measurement, the method of the coaxial connection between gas flowmeter and critical flow Venturi nozzle gas flow standard device is studied in this paper, and the coaxial error between this gas flowmeter and standard device within ±1mm is achieved.
Study on the Relative Model of Engineering Enterprise Career Planning
Authors: Guo Yan Zheng
Published: May 2016

Career planning and ideological and political education is an important part of college education. Career planning education embodies the "people-oriented" scientific development concept, career planning education for college students is beneficial to strengthen college students' ideological and political education work, enhance the actual effect, affinity and appeal of ideological and political education work, From analyzing the relevance of college students' career planning with ideological and political education, the concrete countermeasures of ideological and political education to strengthen college students' career planning is discussed.
Research and Application on Green Manufacturing in Industrial Design
Authors: Li Xiao Dong , Liu Heng Li
Published: May 2016

Since entering 90’s, environmental strategy experienced a new turning point. The adjustment of worldwide industrial structure showing a new trend of green strategy, which is the trend of rational resource utilization, a small amount of waste production, none environmental pollution, and less pollution. Under the impact of green wave, the green manufacturing of industrial design gradually rise, becoming the target of the future development of industrial design. Putting the idea of sustainable development into the industrial design process. So that resources and energy can be used efficiently, and make the pollution to the minimum.