bluuebunny/crossref_metadata_2025 huggingface dataset:
Analysis of Temperature Control Mode of Concrete Construction in Winter
Authors: Liu Yan Jie , Ding Lin , Zhao Yong Jiang , Hu Kun
Published: August 2013

Winter concrete construction is inevitable to cold winter in the north of China.Concrete antifreezing and frost are the emphasis and difficulty in winter construction.In the present work, the method of concrete construction in winter and the mixture ratio adjustment of concrete in storage method construction were introduced, expounds the concrete during transportation and pouring temperature control matters.
Effect of Cement-Based Permeable Crystallization Material on the Performance of Deterioration Concrete
Authors: Liu Jia Bin , Qin Hong Gen , Geng Fei , Guo Wei , Pang Chao Ming
Published: August 2013

During the long term service, concrete deterioration will occur due to erosion circumstance, load or unload condition, which will have negative effect on its security and durability. This article mainly discusses the effect of cement-based permeable crystallization material on compressive strength, rebound putative strength, carbonization performance, chloride permeability, and frost resistance of deterioration concrete. The result has shown that cement-based permeable crystallization material can effectively improve the strength, carbonization resistance performance and chloride resistance ability, but for the frost resistance is not obvious. We also analyze the function mechanism of the cement-based permeable crystallization material through ESEM observation.
Effects of Consumption of Cement in Mechanical Properties of Lightweight Concrete Containing Brazilian Expanded Clay
Authors: Angelin Andressa Fernanda , Ribeiro Lubienska Cristina L.J. , Pires Marta Siviero Guilherme , Jacintho Ana Elisabete P.G.A. , Lintz Rosa Cristina Cecche , Gachet-Barbosa Luísa Andréia
Published: August 2013

Concrete is one of the oldest building materials known to humankind. From 1824, with the advent of Portland cement, concrete assumed a prominent place among the construction materials, due to large amounts of strength, durability and versatility it offered compared to other products, allowing the molding of various forms architectural. Until the early 80s, the concrete remained only as a mixture of cement, aggregates and water, however, in recent decades, due to the development of new techniques and products, the concrete has been undergoing constant changes.
The concrete with lightweight aggregates have been used since the beginning of the last century, with low values of density (< 2000 kg/m3), demonstrating the great potential of using this material in several areas of construction [.
With the objective of analyzing the influence of the consumption of cement in conventional concrete and light, were molded, tested and compared body-of-evidence containing two different amounts of cement consumption: a) 350 kg/m3 and b) 450 kg / m3. The results were compared with those obtained by other researchers, as well as with [ and [.
Maturity of Prestressed Self-Consolidating Concrete
Authors: Long Wu Jian , Wang Wei Lun , Xing Feng , Li Man Tang
Published: August 2013

The maturity method applies the fundamental concept that concrete strength develops with time as the cement hydrates and releases heat. The rate of strength development at early ages is related to the rate of hydration of cement. In this investigation, 27 Self-consolidating concrete (SCC) mixtures made with various mixture proportioning parameters, including maximum size and type of aggregate, type and content of binder, and w/cm were evaluated. Based on this investigation, SCC proportioned with 0.33 w/cm exhibited lower maturity at the same strength level compared to that with 0.38 w/cm; and for the same 0.38 w/cm, SCC made with Type MS cement had higher maturity compared to those proportioned with Type HE + 20%FA and Type HE + 30%S, at the same strength level.
Properties of Environmental Friendly Concrete Containing Recycled Coarse Aggregate and Fly Ash
Authors: Shi Xiaoshuang , Wang Qingyuan , Li Lang , Long Tao
Published: August 2013

Six mixtures with different ratios (0%, 50% and 100%) were designed to investigate the compressive strength, elastic modulus and Poissons ratio of geopolymeric recycled concrete (GRC). The mechanical properties and failure mechanism of recycled concrete (RAC) and GRC were tested and discussed by scanning electron microscopy (SEM) coupled with energy dispersive X-ray spectroscopy (EDX). The results show that, GRC concretes are stronger than RAC concretes due to different reaction products and better microstructure in interfacial transition zones (ITZs). The EDX results show that the higher compressive strength with higher Si/Al ratio.
Study on the Properties of Straw Fiber Reinforced Cement-Based Composite
Authors: Li Chao Fei , Chen Guo Ping , Zhu Shui Wen
Published: August 2013

Plant fiber concrete in the cement base material (cement, mortar or concrete) to join the natural plant fiber, to form a new type of concrete, its advantages can improve the performance of concrete, concrete to reduce costs, save energy. Understanding straw fibers mixed with concrete, the variation in performance, with the same concrete than different content, physical and mechanical properties of the different shapes straw fiber concrete test analysis of the concrete compressive strength, splitting the variation of tensile strength, flexural strength, and economic aspects of performance, to provide a reference for further study of the straw fiber reinforced concrete and other performance and application.
Experimental Researches upon Changes of a Pipe's Roughness after Hydroformation
Authors: Vaceanu Bogdan Constantin , Nagit Gheorghe , Huian Vasile
Published: August 2013

Surface roughness was studied in the tube hydroforming process, considering the quality of the material and the coefficient of friction between the work piece and die. Other researchers have studied the surface roughness to the front of an aluminum pipe [. The aim of this work was to analyze changes in a copper pipe roughness occurred after hydroforming process with fluid. Effects of changing roughness were studied, following the deformation of the material in the work area and roughness changes occurring in the material flow. After achieving hydroforming process, the surface roughness was measured by electron microscopy SEM in different areas of the hydro formed tube. After hydroforming process, an increase of surface roughness in connection areas of the mold to the curvature and the transverse direction of the pipe.
Functional Modeling of an Assembly Line Supplied in Synchronous
Authors: Rotaru Ana , Gavriluţă Alin Constantin , Nitu Eduard Laurentiu
Published: August 2013

The present paper is part of a broader study of the authors, consisting of modeling and simulating several production systems. Functional modeling of a workstation supplied by various methods was carried out and presented in the paper [. This paper presents the functional modeling of an assembly line composed of 4 workstations with manual activities, designed to make 4 types of products (multi-product line). The supply with parts of the line is made with kitting system. The novelty of this study is the use of IDEF0 functional modeling method to describe the functioning of the assembly line in which the supply method is synchronous. The functional model developed had allowed to identify and to design the kitting and picking circuits, as for the highlighting of the traces followed by the components to the workstations, depending on their type of supply. This model can be extended and used to other assembly lines supplied in synchronous.
Determination of Technological Forces in the Incremental Forming Process
Authors: Breaz Radu Eugen , Tera Melania , Bologa Octavian , Racz Sever Gabriel
Published: August 2013

The paper presents a joint theoretical and experimental approach to determine the technological forces within the asymmetric single point incremental forming ASPIF process, based upon a theoretical model, image processing and data acquisition. The first step of this approach was to develop a theoretical model of the forces within the process, based upon the model of a mechanical feed drive of a CNC milling machine. By means of this model, relationships between the resistant torque at the motor spindle level and the technological force on the movement axis could be determined. Using an image processing method, which allowed the user to extract information within the machines operator panel and analytical relationships, the technological forces were determined. The results were compared with the measured values, obtained by means of a data acquisition system.
Influence of the Clearances in the Stamping Device upon the Burrs Resulted on the Stamped Bearing Cages Windows
Authors: Ripanu Marius Ionuţ , Nagit Gheorghe , Merticaru Vasile , Mihalache Marius Andrei , Hurja Ionel Iulian
Published: August 2013

The sheet metal bearing cages quality obtained through punching is influenced by a variety of factors related to the punching mechanism construction, to its adjustment onto the press and also to the technological parameters of the punching process itself. This paper refers to an experimental research study applied to a real industrial environment, which analyzes the sheet metal bearing cages obtained through punching. The paper informs about the main results which were obtained during researches regarding the influence of clearances between the active parts of the punching mechanism upon the dimensions of the punched bearing cages windows burrs. The study presents also some information about results interpretation and several related conclusions.
Dimensional Analysis of Electro-Separation Kinetics of Particles from Dielectric Liquids
Authors: Sajin Tudor , Ostahie Constantin Narcis
Published: August 2013

This paper refers to the purging of particle-dielectric liquid suspensions. The method of treatment of dielectric liquids in electric fields and the physical quantities involved in the process is presented. In order to determine the dimensionless numbers involved in the electroseparation process a dimensional analysis is made with the purpose to obtain an equation that expresses the efficiency of the electroseparation process depending on the physical quantities involved in it. To simulate the dependence of particles relative concentration and the processing relative time on other similarity criteria was developed a calculation software program in Mathcad 14.
Specific Aspects on Modelling and Simulation of the Synchronized Ultrasonic Assistance of the Electro-Discharge Machining Process
Authors: Nanu Sergiu , Marinescu Niculae , Ghiculescu Daniel , Pirnău Claudiu
Published: August 2013

The context of our research is based on the conclusion that simulation is used to describe and analyse the behavior of an existing or conceptual system. Electro discharge machining aided by ultrasonics EDM+US (as well as micro) is a complicated process that requires a powerfull tool to simulate. In this study we considered COMSOL multiphysics FEA software, using our own developed parametric model based on literature survey knowledge and our own previuos researches on subject. Some preliminary simulations results and conclusions are also presented.
Industrial Parts for Investment Casting Built on the Rapid Prototyping Systems
Authors: Coman Adrian , Gebhardt Andreas , Patalita Carol , Leordean Dănuţ Vasile
Published: August 2013

Reduction of product development cycle time is a major concern in industries for achieving competitive advantage. The focus of industries has shifted from traditional product development methodology to accelerated or rapid fabrication techniques. Rapid Prototyping (RP) is the quickest, and can reproduce very complex shapes. With no up-front tooling costs, it can be inexpensive as long as only a few parts are needed. Despite its popularity, traditional Investment Casting (IC) suffers from high tooling investments for producing wax patterns. IC is prohibitively expensive for low-volume production typical in prototyping, customized or specialized component productions.
The Influence of the Lubrication Method and the Cutting Regime on the Surface Roughness when Milling 7175 Aluminum Alloy
Authors: Diciuc Vlad , Lobonțiu Mircea , Bran Gheorghe , Lazar Vasile
Published: August 2013

In the current paper, some aspects regarding the quality of the surface machined under different lubrication conditions is being assessed: cutting under a jet of cutting fluid, minimum quantity lubrication cutting, dry cutting. The objective was to assess the results obtained after MQL cutting in comparison with dry cutting and cutting under a jet of cutting fluid. The variables of the cutting regime were the feed rate and the type of milling (climb and conventional). This study has an important ecological impact over the use of cutting fluids.
Workpiece Clamping at Laser Beam Machining
Authors: Nistoroschi Giorgiana , Bosoancă Gheorghe
Published: August 2013

The laser beam could be obtained by means of a laser diode. The amplification process develops inside the optical fiber. In the laboratory for nonconventional technologies from the Gheorghe Asachi Technical University of Iași, there is an ytterbium fiber laser equipment able to ensure conditions for obtaining a laser spot having a diameter of 30 μm diameter and a wavelength of 1070 nm. This paper purpose is to highlight the solutions that we may consider for a workpiece clamping device. On the bases of the general known information concerning the devices used in order to machine workpieces on machine tools, an ideas diagram was elaborated. Finally, a device practical solution was designed and materialized, this device was used in order to develop some experimental researches.
Spring-Back of Pre-Strained High Strength Steel Stripes
Authors: Chirita Bogdan
Published: August 2013

High strength steels are extensively used in industries like automotive or aviation due to their convenient strength-weight ratio. However, these materials have also a downside given the high strain hardening rate and reduced ductility. Therefore in order to achieve parts with a more complex geometry multiple steps forming is often necessary. Given the complex straining history that a material passes through, it is becoming very important to understand the influence that pre-straining has on the consequent forming processes. This paper aims to investigate the capability of predicting spring-back using appropriate material models.
Controlled Properties of the Thin Films of Ni0.5Zn0.5Fe2O4- BaTiO3 Ferrite-Ferroelectric Nanocomposites - Simulational Study
Authors: Ionescu Daniela , Kovaci Maria
Published: August 2013

A structural simulation strategy was developed for characterizing the thin films of ferromagnetic - ferroelectric nanocomposites consisting of a spinel and a perovskite. The (1-y) Ni0.5Zn0.5Fe2O4 - y BaTiO3 magnetoelectric ceramic, with (1-y) = 0.5 - 0.9 obtained by ferrite grains embedding into the BaTiO3 matrix has found multiple applications for magnetoelectric sensors, four-state memories, anti-electro-magnetic interference (EMI) devices, etc. The tunability of the electromagnetic properties, considered until now as a matter of chemistry, strictly depending on the synthesizing process of the nanocomposite, can be reached by the 3D simulation methods, which reproduce the structure and simulate the interactions between constituents and with external fields. The thin film samples were simulated in the field of a horn antenna (4 ÷ 18 GHz), above the ferromagnetic resonance of the pure ferrite. The effective permittivity, respectively permeability were determined and their evolutions with different internal and external parameters (relative volume fractions, substitution ion radii in the ferrite, polarizing fields) were linked on the intrinsic characteristics of the constituent phases. The obtained surface plots indicates us the sets of optimal control parameters which have to be correlated in practice in order to obtain the desired value of an effective parameter, in a considered frequency subdomain. It appears that the system behaves optimal at a frequency around 8.9 GHz, where the values of the correlated control parameters is convenient for applications at microwave devices. A ferromagnetic - ferroelectric system tunability ranging from 13 to 37% was achieved, depending upon each structure characteristics.
Research Concerning the Optimum Extrusion Temperature for Reinforced Polyamide
Authors: Popescu Adrian , Hancu Liana , Bere Paul
Published: August 2013

Polymeric material's extrusion is a very complex manufacturing process opened for new research. In this paper the authors use for extrusion polyamide 6.6 reinforced with 20% glass fibres. This material offers very good mechanical, thermal and frictional proprieties. The improvement of these proprieties can be realized through the optimization of the extrusion process. Temperature is a very important parameter for obtaining good quality products, so to choose the proper values of it, is an interesting challenge. It was proved that the main influence upon the product's quality have the temperatures from the metering zone and from the forming zone so the optimization of these is of maximum importance for the quality of the products. The Response Surface Method (RSM), based on ANOVA - Analysis of Variance model was used for optimization the temperatures from the metering zone and from the forming zone.
The Automatic Configuration Method of Modular Structures Composing Multi-Axis Heads
Authors: Babă Alexandru , Iordache Daniela Monica , Nitu Eduard Laurentiu , Costea Aurel , Iacomi Doina , Tonoiu Sergiu
Published: August 2013

The important characteristic of modern technological engineering is the systemic approach through unification and typification of problems related to production processes and equipment. The multi-criterial analysis of solutions and connections is difficult under the conditions in which the accelerated generalization of technological innovation determines sometimes an exaggerated diversification of constructive variants. Our researches, presented in this paper, provide original solutions for the development and organisation of modular structures in a computerized data base, the elaboration and use of a new method to automatically configure and reconfigure them using a computer programme. In this way we obtained the optimal variant to construct and operate completely modularized adjustable multi-spindle ends.
Neck Design Solution Adopted in the Development of a New Social Robot
Authors: Adăscălitei Florentina , Doroftei Ioan , Vanderborght Bram
Published: August 2013

In the development of a new social robotic head, the mechanical solution of the robot neck has a major importance due to the fact that this one must support all the head components and must provide soft and natural movements of the robotic head. Hence, to choose the most suitable design, a systematic exploration of the neck mechanical solutions developed until now was conducted. Based on it and, also on the preliminary imposed criteria, the adopted solution was a serial mechanism with 3 degrees of freedom, actuated with high torque servomotors. Additionally, to reduce the motors torque and for gravity compensation, the neck was equipped with helical tension springs. In this paper, a mechanical solution of the neck adopted by the authors, and a mathematical model, will be presented.
Harmonic Gear Modeled in SolidWorks
Authors: Urdea Mihaela
Published: August 2013

This paper deals with significant aspects connected to what the specialized literature calls CAD and it refers to modeling harmonic gears, from a modern and personal point of view. The first part presents harmonic gears in several constructive variants. This is an analysis of the characteristics of this gear, studying the most important components. The second part studies Smart Fasteners PropertyManager and how can this insert fasteners and associated hardware into assemblies. In order to illustrate SolidWorkss ability to offers part and features library or to process databases and to develop new part library a harmonic gear was modeled.
Experimental Design Methodology in Ball End Milling of C45 Material by Using Tool Tilt Angle - Analysis and Estimation of Surface Roughness Variation
Authors: Pasca Ioan , Lobonțiu Mircea , Čep Róbert , Banica Mihai
Published: August 2013

Due to the expansion of milling process with ball end mill in various branches of industry it became necessary for this process to be optimized. For this purpose it is necessary to identify the parameters that influence the process and establish their value for witch the results obtained to be the maximum in terms of qualitative and quantitative. Roughness of the surface machined can be considered as an important element that reflects the degree of successful optimization of this process. In order to solve the problems relating to the analysis and estimation of the surface roughness variation in ball end milling of C45 material with tool tilt angle, in this paper it was designed an experimental methodology followed by analysis of experimental data and estimation of surface roughness variation. The experimental research methodology presented in this paper can be extrapolated and used in a large number of processes.
The Mathematical Model for Studying Bearing Reliability Unconventional Treated
Authors: Gheorghian Mirela , Simionescu Gheorghe
Published: August 2013

The reliability reprezents the main criterion, which imposes itself in the definition of the reliability and the competition of the bearins. The rotation precision and the functional role of the bearings are realized if is a good dimensional stability and proper mechanical properties during the running. To fulfill these conditions it is necessary to establish the technological parameters of the processes of primary heat treatment, hot or cold plastic deformation, intermediate heat treatment, mechanical processing, final heat treatment below 0°C or in ultrasonic field. The comparative evaluation of different variants of heat treatment classic or nonconventional (cryogenic or ultrasonic) which are applied on bearing steels from the point of view of reliability have revealed significant increases of the values of real and median reliability for non-conventional heat treated steels, [.
Vibration Analysis Methods in Bearing Damage Detection
Authors: Bujoreanu Carmen , Horga Vasile , Drăgan Barbu
Published: August 2013

The goal of vibration analysis is to extract features from the measurements x (t) or x (kT0), T0 sampling time, to be used for fault detection and diagnosis. The corresponding analysis methods operate in the time domain (autocorrelation functions, power cepstrum, crest and kurtosis factors), in the frequency domain (Fast Fourier Transform FFT, maximum entropy spectral estimation, envelope analysis) and recently in the time-frequency domain. Time-frequency analysis methods represent efficient alternatives to detect bearings damage due to non-stationary impact signals. In this case, the short-time Fourier transform (STFT) or the Wavelet transform are applied. The paper presents a comparative study of some methods used in bearing faults detection (the envelope spectrum and the wavelet transform). A monitoring tool acquires experimental data from a bearing vibration control test rig. An accelerometer captures the signal from the bearing outer ring then it is processed using PCI-4451 National Instruments data acquisition board and LabVIEW soft.
Electrical Elements in Reduction of Mechanical Vibrations
Authors: Białas Katarzyna
Published: August 2013

This work presents methods of reduction of the vibration of mechanical systems by means of active elements as well as examples of implementation of active reduction of vibration by means of electrical elements [. This work also describes a structural and parametric synthesis, which can be defined as the design of systems meeting specific requirements. These requirements refer to the frequency values of the systems vibration. The presented approach i.e. a non-classical synthetic method applied in designing mechanical systems, one (as early as at the design and construction stage) may verify future systems [1-. This work presents the description of vibration reduction methods. The most popular methods are passive, active and semi-active. An important aspect of this work is the presentation of several possibilities of the physical implementation of active subsystems. In examples active subsystems consisted of the following electric elements is coil with a movable core. In this work is presents influence of electrical subsystem to basic mechanical system. Designer should analyse the resultant systems and investigate the interaction between the subsystems and the basic system [4-.
Design and Manufacturing of a Low Head Banki Turbine
Authors: Popescu Constantin
Published: August 2013

The paper presents the design and the manufacturing plan of a new Banki turbine for very low heads, in the domain 0.6-0.9-1.2m. After analyzing the working parameters and the design conditions, a rotor having 24 blades was designed. The section of rotor blades is semicircular, which is very advantageous from the point of view of the manufacturer, because the blades can be constructed from pipes cut-off along the generating line. In order to strengthen the rotor, the blades of the turbine are inserted in the undercuts of four rotor disks. The main advantage of the proposed machine is the simplicity of the manufacturing solution.
System for the Management of Raw Materials Based on RFID Technology
Authors: Ionescu Octavian , Ionescu Gabriela Cristina
Published: August 2013

The system presented in this article has been developed in order to solve several problems occurred during uploading raw materials in the storage tanks of a dry mix mortars plant and to keep an accurate material balance of raw materials introduced in the production process. The proposed approach was to implement a UHF, RFID (Ultra High Frequency, Radio Frequency Identification Device) system consisting of tags on the intake of the uploading pipes and outlets of the transportation trucks and a UHF, RFID Writer/Reader with four antennas in the proximity of uploading and to create an associate database for tracking the uploaded materials. The newly developed system has been successfully operationally tested in a dry mix mortar plant nearby Ploiesti.
Improving the Company Performance by Using Energy Audit Method
Authors: Aciobanitei Andrei , Militaru Constantin , Khassawneh Nancy , Vladoi Crinel
Published: August 2013

This article approaches the technical means to generate savings for companies, and this is accomplished in an ecological manner, by reducing waste of energy. This implies performing deep technical analysis using specific methods and tools for energy auditing of a company building and technical installations. The most effective way for enhance process performance is tuning. The first step is energy audit, the way to determine where energy loses appears and what could be improved in order to eliminate them, thus being more efficient and ecological.
Broadening the Use of Product Development Ontology for One-Off Products
Authors: Petrovan Adrian , Lobonţiu Gabriela , Ravai Nagy Sándor
Published: August 2013

In the context of technical and economic challenges, the last decade stands out through a continuous preoccupation to develop integrated design models, based on ontological structures of information submission. Tracking the life cycle of a product by using PLM systems requires the analysis and integration of knowledge resulted from product development ontology creation and use.
A Conceptual Model of Product Design
Authors: Beju Livia Dana , Brîndaşu Paul Dan , Oniţă Gabriel Vasile
Published: August 2013

The paper presents a conceptual model that pursues the understanding of the activities, the phases and the mechanisms of product design. The purpose of this model is to aid the product conception phase, as well as to develop software products that can furthermore aid design. The model takes into account the entire mental potential of the human being. The paper uses Jung's model in order to describe the various aspects of the human psyche. The paper presents a number of design models from the scientific literature. The proposed model defines domains of the needs imposed by stakeholders and specialists, functions domains and product domains. It explains the mechanism through which information is passed from one domain to another. As the information travels between domains, it undergoes a series of modelling and objectivation processes. The model is explained in better detail for the first phase of product design; however, it is applicable in all phases of product lifecycle. In the space and time coordinates used by the model, the conception appears as a spiral.
Surface Modification and Characterization of Photodegradable Polystyrene-TiO2 Nanocomposites
Authors: Buasri Achanai , Loakhonka Pornpimon , Benjapolchai Tanaporn , Chusripet Nitchanan , Loryuenyong Vorrada
Published: August 2013

In this study, polystyrene (PS) nanocomposites with TiO2 and surface-modified TiO2 nanoparticles were prepared by compression molding method. TiO2 nanoparticles were modified by 3-(methacryloxy) propyl trimethoxysilane (MPS). The resulting nanocomposite thick films were compared with pure polystyrene. It was found that MPS-modified TiO2 nanoparticles were better dispersed in PS matrix due to their hydrophobic characteristics. The addition of small amount of TiO2 nanoparticles could greatly decrease the optical bandgap of PS from 4.0 eV in pure PS to less than 3.0 eV in PS-TiO2 nanocomposite. The effects of surface modification and UVC irradiation on the physical properties and the degradation of nanocomposites were investigated.
A Review and Prospect for Dynamic Load and Stability Check Method for Dual Derrick
Authors: Zhu Lin , Chen Yan
Published: August 2013

The article introduces the dynamic characteristics researches for dual derrick, they are wind load response analysis, the vibration characteristics analysis, seismic response analysis and wave load analysis. On the stability of the dual derrick check, the article recommends the nonlinear finite element method and the treatment of boundary conditions. Although these studies have a certain guiding significance for the practical engineering, but there is a relative lack of the study for the dual derrick on deep-water drilling rigs. To this end, the article points out research contents for the further study of dual derrick dynamic characteristics, proposes the idea that using the reliability analysis theory of large truss structure to research the reliability of the double derrick.
Study on the Improvement of Lamp Groups Production Line Based on IE
Authors: Zhao Ling
Published: August 2013

Highly luminous Cold Cathode Fluorescent Lamp (CCFL) is widely used in notebook computer, plasma display, digital camera, video camera, and it is used more and more widely. How to improve yield, reduce cost is paid more and more attention in the production. This paper,based on the Cold Cathode Fluorescent Lamp assembly production line as the research object, the application of industrial engineering methods, through detailed analysis and Research on the workshop layout, logistics control, plant layout, equipment and production line balance, proposed the improvement scheme of new. The production line more balance, improve productivity, and satisfactory results have been obtained.
Preparation and Characterizations of Ni Doped Mesoporous TiO2/SiO2
Authors: Min Liang , Yao Wen Hua
Published: August 2013

Ni doped amorphous mesoporous titaniasilica with Ti/Si mass ratio of 0.8 (NiTiO2SiO2) was synthesized, and this material was characterized by a combination of various physicochemical techniques, such as N2 physisorption, diffuse reflectance UVvis, X-ray diffraction, and FT-IR. Interestingly, and some of this material showed sphere shape.
Design and Analysis of Compliant Rotary Joint
Authors: Dao Thanh Phong , Huang Shyh Chour
Published: August 2013

Unlike rigid-body mechanisms, compliant mechanisms (CMs) gain some or all of their motion from relative flexibility of their joints. This paper presents a pseudo-rigid-body model (PRBM) method and virtual work to design and analyze kinematics and dynamics for compliant rotary joints or flexure hinges in the processing of compliant mechanisms. The stress at flexible pivot, the nonlinear-large deflection of flexure hinge, the relationship between displacement and force and/or torque, stress were taken into account in this work based on PRBM. A numerical software package, ANSYS, was exploited to illustrate schematic diagram of the stress versus to horizontal displacement of free end AB of flexure hinge. A mechanism with the desired structure is that one of the most popular aspects, which is needed to take into account in the design phase in advance. The results revealed that the proposed effective approach can be further easily applied in compliant mechanism structures. Future work will focus on multi-objective structural optimization of the flexure hinge.
Dissimilar Materials Joining between SSM 356-T6 and AA6061-T651 by Friction Stir Welding
Authors: Meengam Chaiyoot , Tehyo Muhamad , Muangjunburee Prapas , Wannasin Jessada
Published: August 2013

The aim of this research is to study the influence of welding parameters on the metallurgical and mechanical properties of friction stir welded butt joints of dissimilar aluminum alloy sheets between Semi-Solid Metal (SSM) 356-T6 and AA6061-T651 by Friction Stir Welding (FSW). The base materials of SSM 356-T6 and AA6061-T651 were located on the advancing side (AS) and on the retreating side (RS) respectively. The base materials were joined under different tool rotation speeds and welding speeds. The material flows from SSM 356 and AA6061-T651 were clearly visible in the weld nugget. In addition, the mixtures of fine equiaxed grain were observed in the stir zone. The increase in tool rotation speed results in the increase in tensile strength of the joints. As for welding speed associated with various tool rotation speeds, an increase in the welding speed affected lesser the base materials tensile strength up to an optimum value; after which its effect increased. Tensile elongation was generally greater at greater tool rotation speed. An averaged maximum tensile strength of 206.3 MPa was derived for a welded specimen produced at the tool rotation speed of 2,000 rpm associated with the welding speed of 80 mm/min. In the weld nugget, higher hardness was observed in the stir zone than in the thermo-mechanically affected zone. Away from the weld nugget, hardness levels increased back to the levels of the base materials.
Dry Machining of Brass Using Titanium Carbonitride (TiCN) Coated Tool
Authors: Ariff Tasnim Firdaus , Kamarudin Mohd Syahidan , Haron Mohd Amiruddin
Published: August 2013

Dry machining is environmentally friendly, clean and safe to be performed. Regardless of decreasing tool life due to lack of lubricants, choosing dry machining over wet machining may be a wiser choice since the cost of purchasing and disposing the cutting fluids can contribute to a higher cost. Wear rates, tool wear intensities and material removal rates (MRR) of TiCN coated tools using both dry and traditional wet machining on brass were studied with the aim in finding the optimum cutting condition from four different cutting speeds (207, 279, 372 and 498 m/min) with two sets of cutting parameters; depth of cut and feed rate (d = 0.1 mm, f = 0.2 mm/rev and d = 0.2 mm, f = 0.4 mm/rev). Temperatures at the tool-chip interface were measured to analyze the effects of temperature rise during dry machining. Cost analysis on machining cost per piece between dry and wet machining was performed. The optimum cutting condition for wet and dry machining of brass using TiCN coated cutting tool was found to be 498 m/min at d = 0.2 mm, f = 0.4 mm/rev. The tool tip temperature obtained from dry machining did not influence tool wear since the temperature rise is quite similar to the wet machining temperatures. The machining for the dry machining reduced to about 25-76% per piece when compared with wet machining.
Structure and Properties of A Dimer Complex: [Co2(Hdmg)2(dien)2](ClO4)24.5(H2O)
Authors: Liu Xuan Wen , Zhong Bing Wen , Zhang Yue Hong , Guo Rui
Published: August 2013

A new complex crystal [Co2(Hdmg)2(dien)2](ClO4)24.5(H2O) (H2dmg= dimethylglyoxime, dien = diethylenetriamine) had been synthesised in aqueous solution and was characterized by X-ray diffraction and IR spectrum. The complex crystallizes in monoclinic space groupC2/cwith cell constants =20.868(7)Å, =11.408(4)Å, =15.816(4)Å, =90.00°, =116.97(2)°, =90.00°, =3355.8(17)Å3, =4, (000)=1732. The cobalt atom lies in a distorted octahedron environment and coordinates with one oxygen atom from neighbour Hdmg and five nitrogen atoms from bidentate chelate Hdmg and tridentate chelate dien. The two Hdmgs bridge two cobalt atoms to form a six-number Co2O2N2ring.
Renewable Sugars Hydrolyzed from Banana Pseudo-Stem Using Different Chemical Pretreatments
Authors: Aisah Mohammad , Siti Norasmah Surip , Wan Asma Ibrahim
Published: August 2013

Cellulose and hemicelluloses are the main building block of plant cell wall and are known as a natural polymer that usually used in the industries. Cellulose and hemicelluloses could be used as a feedstock for second generation biofuel production where it is subjected to hydrolysis into sugar after which it can be converted into bioethanol through fermentation process. In this study, the matured banana pseudo-stem is used as the source of hydrolyzing sugar from natural material. The objective of this research is to study the effects of different chemical pretreatments (sodium hydroxide, mixture of sodium hydroxide and hydrogen peroxide, sulphuric acid, mixture of sulphuric acid and hydrogen peroxide) and hydrolysis time (1-5 hours) on the sugar yield from banana pseudo-stem. Results showed that, after 3 hours hydrolysis most of the sugars from all chemical pretreatments reduced gradually. Analysis of sugar contents from acid hydrolysis process using High Pressure Liquid Chromatography (HPLC) showed that all the samples contained glucose, xylose, and arabinose where the highest glucose (16.02 mg/L) obtained from fiber treated with mixture of 1.0 M sulphuric acid and hydrogen peroxide. In addition, both highest xylose (64.23 mg/L) and arabinose (45.78 mg/L) are obtained from fiber treated with 0.5 M sodium hydroxide.
Architecture Description Method of Simulation Training System Based on Multiple Views
Authors: Jia Rui Feng , Li Gui Yan , Dong Yan Hong
Published: August 2013

Establishing architecture is the premise of system development. It is necessary for establishment architecture of simulation training system to meet the needs of scientific hierarchy, Reasonable composition division, Technical feasibility and Integrity, Consistence and Traceability of content design. on this basis, puts forward five views is used to describe the simulation training system, and has carried on the detailed elaboration on the relationship between the various products in the view, with operation and reference.
Algorithm of Frequent Item Sets Mining Based on Index Table
Authors: Zhang Lin , Yao Nan Zhen , Zhang Jian Li
Published: August 2013

The paper gave a new frequent item sets mining algorithm based on index table at multiple times for the Apriori algorithm scans the database which causes the I/O load is too large, and the costly problem with the Apriori algorithm which want to have a big candidate sets. The algorithm first generated a one-dimensional index table by scan the database once, and then generates a two-dimensional index table based on the one-dimensional index table. After the two-dimension index table had been generated, we can use the method similar with Floyd algorithm, which inserts the single index entry individually into the two-dimensional index table. If the count of new index value is greater than or equal to Minsuppor after the single index item had been inserted, the new index entrys Item will be a frequently item sets. After all single index entry had been inserted into the two-dimensional index table, all the index entry in the table will be the maximum frequently item sets. After analysis we can see that this algorithm has low cost and with the high accuracy than Apriori algorithm and can provide some reference for related rules.
Application of Business Intelligence in Hospital Information Management
Authors: Cao Xiao Jun , Yang Xiu Feng
Published: August 2013

With the fast development of the hospital information system, the hospital database has accumulated vast amounts of management and clinical medical data. Therefore, we establish the hospital information platform to integrate the various resource of information in hospital and make the effective development and utilization, so that we can construct a data analysis platform which focuses on the patients clinical diagnosis information and the management information for hospital. In this respect, this paper introduces the business intelligence technology into the hospital information statistical field, and sets up the business intelligence system which focusing on the integration of business data and assistant decision support analysis.
Robust PID Parameters Optimization Design Based on Improved Particle Swarm Optimization
Authors: Fan Jin Wei , Mei Qin , Wang Xiao Feng
Published: August 2013

The article, based on satisfying robustness of the system and put forward the objective function of time-domain performance and dynamic characteristics, introduced genetic operators into Particle Swarm Optimization. The algorithm improve the diversity of particles by selection and hybridization operations and strengthen the excellent characteristics of particles in the swarm by introducing crossover and mutation genes, which can avoid bog down into local optima and premature convergence and enhance searching efficiency. The simulation results indicate that when the algorithm is applied to the optimization of PID controller parameters of servo system of grinding wheel rack of MKS8332A CNC camshaft grinder, its performance is better than the single Genetic Algorithms or Particle Swarm Optimization, and it can also satisfy the demand of rapidity, stability and robustness.
Particle Swarm Optimization with Crossover Operator for Global Optimization Problems
Authors: Qian Wei Yi , Liu Guang Lei
Published: August 2013

We propose a modified particle swarm optimization (PSO) algorithm named SPSO for the global optimization problems. In SPSO, we introduce the crossover operator in order to increase the diversity of the swarm. The crossover operator is contracted by forming a simplex. The crossover operator is used if the diversity of the swarm is below a threshold (denoted hlow) and continues until the diversity reaches the required value (hhigh). The six test problems are used for numerical study. Numerical results indicate that the proposed algorithm is better than some existing PSO.
Framework for Emergency Decision Exercise System of Urban Crisis Based on Wargaming
Authors: Li Xiao Lei , Li Huan , Cheng Min Gang , Fan Zhong Qi
Published: August 2013

Urban crises bring enormous threat to peoples life and property. Emergency exercises are the efficient way of anti-crisis training. However, the existing emergency exercises are lack of flexibility and costly. We put forward a novel emergency exercise system framework based on wargaming. First, the framework of wargaming system is introduced. Then, the application of wargaming on emergency decision exercise of urban crisis is described in detail. The advantage of wargaming exercise system is noticeable. It can simulate crisis affairs with low cost, can practice the decision-making abilities, and can help to find weak points of current anti-crisis plans, etc.
Genetic Algorithm Based Aircraft Spotting Allocation Optimal Scheduling Approach on Carrier Flight Deck
Authors: Li Yao Yu , Li Zhi Fei , Zhu Yi Fan
Published: August 2013

To improve the ability of aircraft sortie generation, we propose a genetic method to model the aircraft spotting allocation optimal problem, and transform it to a constrained optimal problem. Sortie path and time from parking spot to catapult are calculated by pseudospectral method, and then the genetic algorithm is given in detail. Finally, an aircraft sortie scenario is given to prove our method. Simulation results testify our method satisfies the requirement of scheduling optimal and can help commanders on flight deck to control aircraft spot allocation.
The Active Front Steering Control Strategy Based on Driver Behavior
Authors: Zhao Jian , Su Yun Fu , Zhu Bing , Wang Peng Fei
Published: August 2013

Active Front Steering (AFS) is an important application to improve the stability of the vehicle, and the driver characteristic is also an important factor for the vehicle stability. In this article, a driver-behavior-based prediction control algorithm for AFS is proposed. According to the informed road trajectory, the ideal preview driver model is introduced to predict the future steering wheel angle. Based on this, a two-degree-of-freedom (2DOF) reference vehicle model and a PID controller are used to generate active steering control. The algorithm is verified by Carsim and Matlab/Simulink co-simulation, and the results show that trajectory tracking of the vehicle can be guarantee and driver manipulation duty can be reduced.
Reduced-Order H∞ Controller Design Using the μ-Synthesis Applied to Lateral Control of Highly Flexible Aircraft
Authors: Zhang Li , Tang Shuai , Zheng Zhi Qiang
Published: August 2013

A lateral flight reduced-order controller for a flexible aircraft is presented. It is based on the reduced-order model of the flexible aircraft and theμ-analysis and synthesis toolbox. The first step deals with the order reduction of the full-model by using the balanced-truncation model reduction method. Then the reduced-orderHcontroller is achieved by using theμ-analysis and synthesis theory and applied to the reduced-order model and full-order model of the flexible aircraft. Finally, numerical results are presented and discussed. The simulation results show the efficiency of the reduced-order controller based on the reduced-order model since the close-loop system of the full-order model meets a set of realistic specifications in the frequency and time domains.
Study on Relay Protection Setting Calculation Fast Algorithm
Authors: Wang Xiao Bo , Li Chong Zhan , Song Wei , Liu Gao Ming
Published: August 2013

As the scale of modern smart grid gets larger and larger, fast analysis and calculation of power grid is an important research topic now. Starting with analyzing and comparing the traditional power system block methods, a partition strategy is proposed which contains buffer subsystem in each partition. Mutual impedance element in the node impedance matrix could describe the strength of electrical contact between nodes. The buffer subsystem is obtained which has a greater impact on the internal network setting calculation based on electrical contact. Further more, the general rules of buffer subsystem which is suitable for setting calculation have been put forward. At last, it can widely improve the adaptability of setting calculation block computing.
Dynamic Modeling and Review of Control Methods for the Quadrotor
Authors: Qiao Zhi Jie , Zhang Cheng
Published: August 2013

Four-rotor micro aerial robots, also called Quadrotor UAVs, have received much attention not only in academic research world but in military as well as commercial applications. In this paper, the quadrotor model is built and its dynamics character is analyzed by making a comparison with the missiles one. Furthermore, various modern strategies used for quadrotor control are presented.