bluuebunny/crossref_metadata_2025 huggingface dataset:
Data Reduction Based on Bi-Directional Point Cloud Slicing for Reverse Engineering
Authors: Chen Lei , Jiang Zhuang De , Li Bing , Ding Jian Jun , Zhang Fei
Published: June 2010

In reverse engineering, complex free-form shaped parts are usually digitized quickly and accurately using the newly arisen non-contact measuring methods. However, they produce extremely dense point data at great rate. Not all the point data are necessary for generating a surface CAD model. Moreover, owing to inefficiencies in storing and manipulating them it takes a long time to generate a surface CAD model from the measured data. Therefore, an important task is to reduce the large amount of data. After analyzing the existing methods developed by other researchers, a new data reduction method, which based on bi-directional point cloud slicing, is presented in this paper. Using the proposed method, point cloud can be reduced while considering geometric features in both two parametric directions. Finally, a face model is used to verify the effectiveness of the proposed method and experimental results are given.
Nanorelief Measurements Errors for a White-Light Interferometer with Chromatic Aberrations
Authors: Sysoev Evgeny V.
Published: June 2010

Chromatic aberrations in white-light interferometer can dramatically increase measurement nanorelief errors. It is shown that these errors can be more than 70 nm. They are result of changing effective wavelength within the measurement field. We have proposed the method for error calculation using measurement data and then their correction experimentally up to 10 nm.
Creativity and School Education: Subjects Vs Professional Identity in a Sample of Teachers in Italy
Authors: Licciardello Orazio , De Caroli Maria Elvira , Castiglione Claudia , Sagone Elisabetta
Published: June 2010

The aim of this empirical study was to investigate the relevance of social climate in the classroom for improving creativity in secondary school students. We hypothesized the existence of a relationship between the Professional Identity of the teachers (or Professional Self), their social representations of pupils, their affective investment in the future (in terms of Possible Selves) and the relevance they attribute to Creativity. The results seem to confirm our hypothesis.
Measures of Emotional and Motivational Processes Activated by Stress or Comfort Conditions
Authors: Biasi Valeria , Bonaiuto Paolo , Giannini Anna Maria
Published: June 2010

Under stress conditions, obtained in the field or experimentally induced, changes occur in the nature and intensity of affective processes (emotions, motivations). Symmetrical changes occur under opposite (comfort) conditions. One of the first procedures for determining temporary stress states consists of administering difficult logical tasks (15 minutes), with erroneous or ambiguous feedback and social pressure. For example, some very difficult Raven Matrices were individually assigned to participants. The first two authors later found another procedure equally effective and even more advantageous for certain aspects: the “drawing recollection” of personal stressful experiences. The corresponding comfort treatments are, firstly, a progressive relaxation session in penumbra; or, in the second case, the “drawing recollection” of personal pleasant and positive experiences. To assess the emotional changes, we prepared seven-point bipolar scales centering on the main opposing emotions. As regards motivations, we used a list of nine motivational systems [1]. The whole set of items made up the so-called Self-Appraisal Scales, administered before and after a specific treatment, thereby obtaining a measure through the differences between the two successive assessments. Factor analyses were conducted for selecting the main emotional and motivational factors. Affective reverberations on cognitive processes were also studied and measured.
Evaluation of Graphic-Pictorial Characteristics and Contents in the Representation of Legality
Authors: Baralla Francesca , Giannini Anna Maria , Sgalla Roberto
Published: June 2010

The present study examines how child drawers selectively use a set of potential expressive strategies in accordance with the nature of the topic being depicted. The phenomenological and psychodynamic method in the evaluation of drawing activity may thus be a particularly appropriate way to find interesting relationships between the variables considered. People leave in a world of signs and symbols that are verbal or gestural or, of a variety of other modalities, graphic. Through drawing, it is possible to represent memories, events, propositions, ideas, plans and also properties of the habitus or of the ethos. Several authors 1 2 3 have proposed that children’s drawings are often based on schemata, which seem to relate to the typical representation of the topic in question. This study lies within broader research into the perception of legality and into the relative effective communication modalities. Primary school pupils, aged 7-9 years, took part in the study to assess the graphic style, quality of shapes and colours, and the graphic accuracy of drawings focusing on the representation of legality.
Measurement of Electromagnetic Shielding Effectiveness of the Composite Carbon Fibers/Nickel Thin Film
Authors: Chang Ho , Yeh Yun Min , Jwo Ching Song , Chen Sih Li
Published: June 2010

This paper presents the development of a conductive composite film and the measurement of electromagnetic (EM) shielding effectiveness (SE) of the prepared film. A coaxial transmission-line technique based on ASTM D4935-99 Standard was used to measure the electromagnetic shielding effectiveness. A nickel nanofluid with an average particle size of 50 nm was prepared with a self-developed nanofluid synthesis system. By using a polymer blending method, carbon fiber and carbon fiber/nickel nanoparticles were blended with waterborne polyurethane (WPU) to prepare conductive composite films of 0.25 mm thick. Experimental results have shown that the electromagnetic shielding effectiveness value of the prepared conductive composite material can reach 26 dB within the range of 50 MHz ~ 1.5GHz.
Comparative Analysis versus Frequency of Inception Voltage of Partial Discharges Phenomena and Breakdown Strength, in Support of Quality Assessment of Insulating Materials
Authors: Ciobanu Romeo Cristian , Schreiner Cristina
Published: June 2010

The broadband Partial Discharge (PD) measurement technique may be considered more accurate than a simple breakdown test and admitted as a complementary method for characterizing the quality of porous/fibrous and composite insulating materials. It should be taken into account especially at higher frequencies, when the risk of breakdown occurrence becomes greater in time, due to the local thermal aspects.
Principle of Absorption Spectrum Measurement of the Layers Adsorbed on Transparent Substrates
Authors: Mikhailova Daria S. , Chesnokov Vladimir V. , Chesnokov Dimitry V.
Published: June 2010

The principle of measurement of spectrum absorptances nanolayers of the elementorganic compounds, based on use of the optical fibre measuring converter is described.
Design and Analysis of a 6-DOF Monolithic Nanopositioning Stage
Authors: Cheng Ling Li , Yu Jian Wei , Yu Xiao Fen
Published: June 2010

A 6-DOF monolithic nanopositioning stage is developed for three coordinate measuring machines (CMM) with nanometer resolution. The stage consists of a monolithic flexure hinge mechanism, six piezoelectric actuators and six fiber-optic displacement sensors. A mathematical model of the constraint optimization problem is presented. Based on the solution of the optimization problem, the final design of the 6-DOF stage is also presented. The numerical analysis on static and dynamic behavior of the stage is done by using the finite element method. The experimental results of the performance of the 6-DOF stage are presented.
Innovations in X-Ray Induced Electron Emission Spectrometry (XIEES)
Authors: Pogrebitsky Konstantin J. , Sharkov Michael D.
Published: June 2010

In modern sciences and technologies it is required to investigate local atomic and electron structure of matter independently on its aggregate state. There are advanced methods aimed at short order. These methods are based on the phenomena accompanied by interference of secondary electrons excited by primary X-ray radiation. Such methods are known as XAFS (X-ray absorption fine structure). These methods are based mainly on using of synchrotron radiation. It is realized in two modes: ‘transmission mode’ and registration of secondary effects that follow the primary X-ray absorption. One may announce only two such effects: X-ray induced fluorescence and X-ray induced electron emission (photoeffect). However, the access to synchrotron rings is problematic for the most users. This fact supposes the necessity to develop laboratory devices of direct urgent access. Since the power of laboratory X-ray sources is much less than the flux from synchrotrons, it is necessary to use secondary electron detectors of considerably higher efficiency. Moreover, it is attractive to possess energy in spatial resolution. Channeltrons and multi-channel plates do not have such abilities. That is why the advanced electron detector was developed and exposed to photoeffect under acceleration field. The work is performed within the frames of ISTC Project #3157.
Tests of Model of Absolute Measuring Instrument of Synchrotron Radiation Power
Authors: Khrebtov Igor A. , Malyarov Valeriy G. , Zerov Vladimir Y. , Nikolenko Anton D. , Pindyurin Valeriy F. , Legkodymov Aleksandr A. , Lyah Vladimir V.
Published: June 2010

A model of absolute measuring instrument of power of synchrotron radiation in soft X-ray range of wavelengths of 8 – 0.4 nm based on high-temperature superconductor bolometer with electrical substitution has been developed, fabricated and tested. Tests have been carried out at the synchrotron radiation (SR) station “Cosmos” on the VEPP-4 storage ring of Budker Institute of Nuclear Physics of the SB RAS. It was ascertained that sensitivity of the device allows carrying out measurements of an SR flux power in the given spectral range. The minimum measured power was 3.2 W. A predicted threshold sensitivity of bolometer ~10-10 W/Hz1/2 at modulation frequency of 10 Hz and analysis of other factors influencing the measurement accuracy prove it to be real to achieve a 1 % accuracy at measurement of SR flux power of about 1 W.
Development of Innovative Fringe Locking Strategies for Vibration-Resistant White Light Vertical Scanning Interferometry (VSI)
Authors: Chen Liang Chia , Tapilouw Abraham Mario , Yeh Sheng Lih , Lin Shyh Tsong , Chen Jin Liang , Huang Huan Chi
Published: June 2010

White light interferometry has become an important method for measuring micro surface profiles with a long vertical range and nano-scale resolution. However, environmental vibration encountered in in-field optical inspection is usually unavoidable and it affects measurement performance significantly. Isolating vibration sources from the measurement system sometimes is not completely effective, especially within complicated in-field fabrication environment. Therefore, in this research we aim to develop a novel method in achieving white-light fringe-locking condition during vertical scanning processes. The developed optical system consists of white light source, a Mirau objective, a PZT vertical scanner, an optical band-pass filter and two image sensing devices. The developed system generates a high and a low coherent interferograms, simultaneously captured by two charged coupled devices (CCDs). The high coherent interferogram is employed to detect high-speed nano-scale displacement and direction of the external vibration. An innovative real time fringe-locking operation is performed and a new vertical scanning technique is performed accordingly to isolate vertical scanning from environmental disturbances. The feasibility of the anti-vibration VSI system is verified by performing some of industrial in-field examples. Based on the experimental result, the fringe locking technique can improve the measurement result.
Compensation of Tilt Angles and Verification of Displacement Measurements with a Fabry-Perot Interferometer
Authors: Wang Yung Cheng , Shyu Lih Horng , Jywe Wen Yuh , Lee Bean Yin
Published: June 2010

The construction of Fabry-Perot interferometer is very simple and it has been already utilized in different measurement systems. The result of displacement measurement is obviously influenced by the tilt angles of measurement mirror, if a Fabry-Perot interferometer is utilized for displacement measurement. Hence, the measuring range of current systems is rather small (less than 1 mm). The goal of this investigation is to develop a Fabry-Perot interferometer for large travelling range (till 60 mm) by aid of compensation of tilt angles with an angular sensor, piezo translators, control mechanism and self-designed software. To verify the measuring characteristic of the self-developed Fabry-Perot interferometer, some comparison measurements have been performed. A commercial laser interferometer serves as reference standard and the differences between Fabry-Perot interferometer and the commercial Laser interferometer are measured. Through experimental tests, the differences are less than 0.3 m in the full measurement range. The results show that the Fabry-Perot interferometer can meet the measuring requirement with high accuracy of sub-micrometer order and large measurement range.
A Compact Signal Processing with Position Sensitive Detectors Utilized for Michelson Interferometer
Authors: Shyu Lih Horng , Wang Yung Cheng , Lin Jui Cheng
Published: June 2010

Interferometric signals of a homodyne Michelson interferometer appear in sinusoidal forms. In this investigation, new concepts for signal processing of Michelson interferometer are demonstrated. With the utilization of detection of position sensitive detector (PSD) and by the procedure of differential signals and the characteristic of symmetric waveform, a compact signal processing for homodyne Michelson interferometer has been developed. Its advantages include simplified procedure, fast processing and few electronic hardware. For experiment tests of the signal processing, a conventional homodyne Michelson interferometer has been constructed. Major components of the interferometer consist of laser light source, beam splitter, mirrors, PSD and piezo transducer for driving measurement mirror. To verify the performance of the signal processing, a commercial nanopositioning stage as reference standard has been utilized for comparison measurements. Through theoretical analysis and experiment tests, it can be proved that by the developed signal processing an interferometer possesses the optical resolution of 79 nm. With support of the developed signal processing, interferometers will possess the benefits of simply structure, few components and lower cost.
Cutting Edge Preparation by Means of Abrasive Brushing
Authors: Denkena Berend , de Leon Luis , Bassett E. , Rehe M.
Published: June 2010

The need for new cutting tool technologies is driven by the constantly increasing performance of machine tools and the rising market competition. Current research results show that an improved combination of the cutting edge macro- and microgeometry, together with an appropriate substrate and coating, leads to a significant enhancement of cutting tool performance. Furthermore, inappropriate cutting edge microgeometries cause, in addition to the higher production costs, a reduction of the tool life. Hence, it is essential to produce tailored cutting edge microgeometries with high precision and process reliability. This paper presents the influence of brushing process parameters on the size and the form of produced cutting edges of indexable inserts. This leads to a better understanding and higher quality of the cutting edge preparation process by means of abrasive brushes. Furthermore, the process reliability of 5-axes brushing is analyzed. An example of a tool life map presents the significantly enhanced tool performance through cutting edge preparation and its sensitivity towards varying the cutting edge microgeometry.
New Methods for Characterizing Coating Properties at Ambient and Elevated Temperatures
Authors: Bouzakis Konstantinos D. , Batsiolas M. , Malliaris G. , Pappa Maria , Bouzakis Emmanouil , Skordaris G.
Published: June 2010

In the paper, innovative methods for characterizing coatings’ properties at ambient and elevated temperatures are introduced based on various experimental procedures. Nanoindentation results, which were obtained at elevated temperatures, are evaluated by FEM algorithms, rendering possible the determination of temperature dependent coating mechanical properties. Impact tests conducted on coated specimens revealed a non-linear film impact resistance versus the temperature. The latter results were evaluated by appropriate FEM supported procedures, to predict the coating fatigue endurance stress versus the temperature. In these investigations, the impact load was induced electromagnetically for a duration of ca. 1ms, depending on the force amplitude. To change the impact load characteristics, such as frequency, impact duration etc., a new test device has been developed, employing a piezoelectric actuator. This device enables the investigation of the impact time effect on the dynamic response of coated surfaces and on the coating fatigue endurance stress. Finally, diffusion phenomena in coatings were examined by a developed convenient experimental setup. A specimen is pressed onto a coated surface at adjustable high temperature and pressure in an inert atmosphere. After this test, the diffusion of characteristic elements into the coating and vice versa is detected by EDX-microanalyses. These results contribute, among others, to the description of diffusion phenomena between coatings and various materials.
Self-Supporting Nanocrystalline Diamond Foils – A New Concept for Crystalline Diamond on any Technical Surface
Authors: Lodes Matthias A. , Rosiwal Stefan M. , Singer Robert F.
Published: June 2010

The manufacturing and application of self-supporting nanocrystalline diamond foils is introduced. The high temperature manufacturing of nanocrystalline diamond foils by hot-filament chemical vapour deposition (HFCVD) is separated from the low temperature application, allowing the coating of temperature sensitive materials, which cannot be coated by HFCVD conventionally. By coating appropriate template materials and stripping-off after the CVD-process, self-supporting, flexible nanocrystalline diamond foils with high hardness (> 70 GPa) and very low thermal conductivity (< 1 W/mK) with thicknesses of up to 100 µm can be produced. Lasercutting is an appropriate method for machining any desired geometry. Thus the possibility to use the extreme properties of diamond for protection against friction and wear on new substrate materials, e.g. steels, light metals and polymers, is generated.
Tribological Characterization of PVD-Coatings
Authors: Schrader Tobias , Engel Ulf , Merklein Marion
Published: June 2010

In cold forging processes the high tribological and mechanical loads often lead to early tool failure. If the cause of failure is wear, an extension of tool life could be achieved by the application of PVD coatings. In industrial tools there is a great variety of load cases that causes wear. Therefore a lot of coatings with different properties are necessary, which need to be adjusted to the various applications. In order to adapt the coatings appropriately to the different processes, a sufficient characterization of the coatings is required. In this paper three new types of PVD coatings based on TiC, AlCrN and TiAlN and two reference PVD coatings based on TiN and TiAlCN are investigated. Since friction plays an important role for the tribological conditions between workpiece and tool, the friction factor m of the coatings is determined for different lubricants in the so called Double Cup Extrusion (DCE) test. A major influence of the lubricants and a minor influence of the coatings can be seen in the conducted tests. Furthermore wear behavior of the coatings is investigated with a so called combined Punching-Forward Extrusion (CPFE) test. In this test it is possible to test simultaneously coated dies and punches under realistic conditions. For the new coating (TiAlN), characterized by monolayer structure, there is wear debris visible in some regions of the die shoulder. The early occurrence of wear might be caused by the ductility of the coating or adherence problems. The other new coatings (TiC and AlCrN), which have a multilayer structure, are revealing excellent wear behavior. The high wear resistance of these two coatings can be explained with their high hardness in combination with a special layer composition.
Evaluation of PVD Coated Tools’ Life in Milling Ti6Al4V, Based on Impact Tests at Ambient and Elevated Temperatures
Authors: Michailidis Nikolaos , Bouzakis Konstantinos D. , Klocke Fritz , Witty Martin , Lili Eleftheria , Gerardis Stefanos , Pappa Maria
Published: June 2010

A methodology based on FEM-calculations and experimental tests for predicting coated tool efficiency in milling Ti6Al4V by coated cemented carbide inserts is introduced. The used coatings were: (Ti,Al,Si)N and (Ti,Al)N films. The stress-strain curves and the fatigue critical loads of the coatings were determined by nanoindentations and impact tests respectively at various temperatures, employing FEM-supported procedures developed for results evaluation. The milling investigations were conducted at various cutting speeds. The stress and temperature fields in the cutting edge region were obtained by FEM calculations of the milling process. These results facilitated the explanation of the coated inserts’ cutting performance versus the cutting speed. The cutting tests at various cutting speeds and the impact tests at ambient and elevated temperatures revealed that the tool life and the film impact resistance versus the temperature are not linear. Moreover, a sufficient correlation of the coatings’ impact resistance at various temperatures with their cutting performance at corresponding cutting speeds was revealed. In this way, an adaption of the cutting conditions to the films’ temperature-dependent strength can lead to a considerable cutting performance improvement.
Influence of Substrate Nitriding on Adhesion, Friction and Wear Resistance of DLC (Diamond-Like Carbon)-Coatings
Authors: Tillmann Wolfgang , Vogli Evelina , Hoffmann Fabian , Kemdem Patrick
Published: June 2010

Since diamond like carbon layers feature excellent mechanical and tribological behavior under defined environmental circumstances, they are well established in a wide field of industrial and automotive applications in the last decade. However, the pretreatment of the substrate plays also an important role in supporting and enforcing the excellent properties of the coatings. This work analyses the effect of the plasma nitrided cold working steel substrate (80CrV2) on the adhesion, friction and wear resistance of DLC-coatings and compares it to the performance of DLC-coatings applied on a non-hardened substrate material. Therefore the grinded and polished specimens were nitrogen-hardened in an Arc-PVD (Physical Vapor Deposition)-device before the DLC-coating was applied in a Magnetron Sputter-PVD-process. In order to measure the hardness of the thin film coating, a nanoindenter was used. The adhesion was tested with a scratch tester and the wear resistance was measured by using a Ball-on-disc-tester. A 3D-profilometer and a SEM (Scanning Electron Microscope) were utilized to analyze the scratches and wear tracks on the samples. With these results correlations between the substrate nitriding and the mechanical and tribological performance of the DLC-coating were made.
Qualification of Coatings to Predict Wear Behavior of Micro Blasted Cutting Tools
Authors: Klocke Fritz , Gorgels Christof , Stuckenberg Arne , Bouzakis Emmanouil
Published: June 2010

In today’s production engineering nearly every cutting tool is coated. In the field of coating technology and tool treatment blasting is a common way to increase tool life or hold it on a constant level for several reconditioning steps. The latest innovation referring blasting are micro blasted coatings. For this technology a parameter variation was examined and the consequential tool life was compared with common testing method for tool systems in order to qualify the coating treatment. The investigations were carried out using an aluminum and zirconium oxide as blasting abrasive and by varying the blasting parameters pressure and duration. Finally, the treatment led to an optimized tool wear behavior due to micro blasting of the coating and the wear behavior could be referenced against the testing methods.
Coating Development for Gear Cutting Tools
Authors: Kohlscheen Jörn , Knoche Hans Joachim , Hipke Martin , Lümkemann Andreas
Published: June 2010

Pre-machining of gear wheels is often done by hobbing using a soft work-piece material. Today, almost all of the hobs are used with a hard coating to enhance their life-time considerably. This paper describes the results obtained with a tailored coating in a single tooth cutting test (fly cutting). We show that a nano-structured multi-layer coating based on AlCrN is able to protect a tool better than conventional single-layer coatings. The specific mechanical and structural properties of the coating are explained in detail.
Chip Length Effect on the Wear of Coated Cemented Carbide Inserts in Milling
Authors: Bouzakis Konstantinos D. , Gerardis Stefanos , Katirtzoglou G. , Makrimallakis S. , Skordaris G. , Efstathiou K.
Published: June 2010

The effect of the developed chip length on the coated tool’s cutting performance was investigated. Milling experiments at various cutting speeds and chip lengths were performed, which resulted to different tool wear developments. To explain these results, a FEM simulation of the cutting process was conducted and the related chip geometries were predicted and compared to the corresponding experimental ones. Based on these results, the Coulomb friction coefficient between chip and tool rake was appropriately adjusted to achieve a sufficient correlation between experimental and computational data. By additional FEM calculations, the mechanical and thermal loads of the cutting edge were estimated and insight was provided concerning the effect of chip length on coated tool stresses and film fatigue fracture. The obtained results revealed that the chip length reduction improves the cutting performance of coated tools and a significant increase of the removed material volume and material removal rate as well can be achieved.
Impact Behaviour of PtIr-Based Coatings with Different Interlayers for Glass Lens Moulding
Authors: Bobzin Kirsten , Klocke Fritz , Bagcivan Nazlim , Ewering Mara , Georgiadis Kyriakos , Münstermann Tobias
Published: June 2010

Over the last decades demands for optical systems and complex optical products made of glass increased steadily. Precision glass moulding has a great potential for the bulk production of complex lenses with high precision and low costs. To prevent sticking or reactions between hot glass and moulding, and to reduce abrasive wear of the die a protective coating is deposited on the tool. In this research two coating systems suitable for this application are compared by analysing their behaviour under an impact load. The PVD (Physical Vapor Deposition) coating PtIr with two different bond coatings Ni or Cr is analysed. During impact test number of impacts and loads are varied. Compared to industrially used coating system PtIr with a Ni interlayer the adhesion can be improved by using a Cr interlayer. The PtIr-based coating with Cr as bond coating shows an excellent endurance even at very high loads causing Hertzian stresses in the range of 10 14 GPa. An impact load of 600 N which corresponds to a contact pressure of app. 13.2 GPa generates almost no damage after 200,000 impacts.
Diamond Machinable Sol-Gel Silica Based Hybrid Coatings for High Precision Optical Molds
Authors: Mehner Andreas , Dong Ju An , Hoja Timo , Prenzel Torsten , Mutlugünes Yildirim , Brinksmeier Ekkard , Lucca Don , Klaiber Fritz
Published: June 2010

The demand for high precision optical elements as micro lens arrays for displays increases continually. Economic mass production of such optical elements is done by replication with high precision optical molds. A new approach for manufacturing such molds was realized by diamond machinable and wear resistant sol-gel coatings. Crack free silica based hybrid coatings from base catalyzed sols from tetraethylorthosilicate (TEOS: Si(OC2H5)4) and methyltriethoxysilane (MTES: Si(CH3)(OC2H5)3) precursors were deposited onto pre-machined steel molds by spin coating process followed by a heat treatment at temperatures up to 800°C. Crack-free multilayer coatings with a total thickness of up to 18 µm were achieved. Micro-machining of these coatings was accomplished by high precision fly cutting with diamond tools. Molds with micro-structured coatings were successfully tested for injection molding of PMMA optical components. The wear resistance of the coatings was successfully tested by injection molding of 1000 PMMA lenses. Hardness and elastic modulus of the coatings were measured by nano indentation. The chemical composition was measured by X-ray photo electron spectroscopy (XPS) as a function of the sol-gel processing parameters.
Physico-Chemical Aspects of Surface Activation during Fluxless Brazing in Shielding-Gas Furnaces
Authors: Bach Friedrich Wilhelm , Möhwald Kai , Holländer Ulrich
Published: June 2010

Continuous process brazing in shielding-gas furnaces is tailor-made for manufacturing mass production components by means of brazing technology. Which brazing tasks can actually be carried out by a shielding-gas furnace, depend on many ancillary conditions. In particular these are, besides the component size and joint geometry, the base materials and brazing filler metals as well as the material specific process parameters which are to be maintained in a continuous furnace in order that a process assured brazing can be guaranteed. In this context, the activation of the component's surfaces play a central role for wetting with the braze melt. Within the scope of this contribution, the variables and ancillary conditions concerning this matter are presented and discussed using the brazing process on stainless steels as an example.
Determination of Mechanical and Corrosion Properties of Boride Coating on P91 Steel
Authors: Omar Haidar , Michailidis Nikolaos , Skolianos Stefanos , Mavropoulos Azarias , Tsipas Sofia , Maragoudakis Nikiforos
Published: June 2010

In many applications, even high-performance alloys have to be covered with protective coatings, providing higher corrosion and oxidation resistance, as compared to the alloy itself. This study investigates the feasibility to apply boron coatings on P91 steel by pack cementation process, to increase the steel durability in oxidative and corrosive environments, as well as its mechanical strength.
Micro-indentation and the coating impact test were used to characterize the hardness and fatigue properties of the film respectively. The coating corrosion resistance versus the one of the uncoated P91 steel was tested in a salt spray chamber. The coating performance was characterized by optical and scanning electron microscopy to check the consistency of the coated and uncoated surfaces and the oxidation extend. The results show an increased film strength, good fatigue performance and adequate corrosion resistance.
Mechanical Vibration Analysis Using ANC and Morlet Wavelet
Authors: Sui Wen Tao , Lu Chang Hou
Published: June 2010

A method of vibration analysis for mechanical fault detection based on adaptive noise canceling(ANC) and envelope analysis was presented. The adaptive filtering was used for noise canceling and feature extraction from vibration signal measured for the detection. The envelope analysis based on analytic wavelet was also used for the fault detection. Experiment shows that the method proposed in this paper is very effective for reducing noise, and for vibration analysis to discriminating the fault types with a high accuracy.
A Kind of Integrated Modeling Method for Networked Manufacturing Platform
Authors: Song Yu Chuan , Wang Ze , Lei Qi
Published: June 2010

Aiming at the characteristics of complicated organization behavior, diversified business process and changeable functions in the construction of networked manufacturing platform, this paper proposed an integrated modeling method for networked manufacturing platform combined with DEMO(Dynamic Essential Modeling of Organization） and NAM (Norm Analysis Method), which making use of the two method’s characteristics sufficiently, to support system modeling with full consideration of organization behavior criterion, function subdivision and business process refinement. This integrated modeling method provides an effective tool to design and develop networked manufacturing platform and achieved good effect in application.
An Advanced Optimization Model of Emerging Energy Priority - Development Fields Based on PS-NN Algorithm
Authors: Liu Zhi Bin , Su Yanna , Zhang Zhi Gang
Published: June 2010

The scope of emerging energy is broad, and the development scale and stage of each kind of energy is also irregular. In order to choose the priority development fields of emerging energy, this paper introduces the particle swarm (PS) optimization algorithm into the neural network (NN) training based on an overall situation stochastic optimization thought, establishes the PS-BP neural network model, which optimizes the initial weight value of BP neural network using PS first, then uses the neural network to complete the study of given accuracy. The simulation results indicated that the improved PS-BP algorithm to be able to solve the slow convergence rate and easy to fall into local minimum of learning network weight and the threshold value of conventional BP algorithm effectively, has the quick convergence rate and the high evaluating precision.
A Novel Information Organization Method Based on Ontology for Unstructured Information
Authors: Ji Zhi Gang
Published: June 2010

The paper analyzes the mode and method for unstructured information, compares the similarities and differences between ontology and vocabulary and taxonomy, and discusses the position and the function of ontology for unstructured information from the two aspects of standard system of semantic net and the concept characteristic of ontology. Based on the ontologies DB, the annotation of unstructured information is obtained. Information retrieval which consists of concept-matched retrieval and rule-based reasoning retrieval is proposed with the help of information annotation. The experiment results show that rule-based retrieval has better recall and shorter retrieval time than fact-based retrieval and relationship-based retrieval.
Yunnan Dehong Pre-Warning Information System Based on GIS for Flood Damage on Roads
Authors: Lin Gang Yong , Chen Qin Yan , Meng Yi , Yao Qing Hua
Published: June 2010

To build a real-time alerting system of road damages caused by flood in Dehong autonomous prefecture, Yunnan Province. Base on the Yunnan Traffic system network, to grab data from WebPages and collect information related to road damage in Dehong autonomous prefecture, and then combine with the expert analyzing system with the function of artificial data modifying and self- learning, so as to predict more than 70% of the road damages from floods and save time for rescuing.
A Case Study on the Distributed Databases Using a Hybrid Rough Sets Method
Authors: Dai Sheng Hui , Zhou Hua Qing , Na Shuang
Published: June 2010

With the developing of Distributed Database technology, fuzzy query of Distributed Database has been playing an important role in the information query. Raising query speed and precision ratio is always the main topic of information query. In this paper, a new type of information query system--Distributed Database system is designed with rough set theory and fuzzy set knowledge. A new information query method is advanced and the architecture of the system and its key algorithms are given. Main characteristic of the research achievement is that query algorithm’s time complexity decreases with the increase of amount of information and relates to the only amount of index words. Results show that it is an effective method with which a system for fuzzy query is implemented.
A Novel Image Fusion Approach Based on Rough Set and Wavelet Analysis
Authors: Zhu Zhi Yong
Published: June 2010

The goal of image fusion is to combine a high-quality image from multi-image about the same object. The paper presents an image fusion scheme based on wavelet transform and rough set. Firstly, the two images are decomposed by orthogonal wavelet; the image’s wavelet coefficients are got. Comparing with the two image’s wavelet coefficients, wavelet coefficients’ matrix is composed of maximum absolute value, the fused image is obtained by the inverse wavelet transform. The last section of the paper verifies the method by experiment and gets the good experimental results.
A Customized IPv6 Header for Packet Transmission over a LAN
Authors: Zhou Hua Qing , Dai Sheng Hui
Published: June 2010

Header compression can effectively improve transmission efficiency, but existing header compression algorithm reduces the performance when operating over wireless links, because the differencing coding that the algorithm used does not adapt to packet over LAN. A new method for IPv6 header compression named is proposed, the compression is based on substitution and is not affected by packet loss. The method can significant improve the transmission performance over LAN.
Environmental Risk Assessment of Handan Chenguang Bio-Technology Group Protein Project
Authors: Zhou Ji Hong , Zhao Shu Kai
Published: June 2010

The risk assessment is a very important aspect in the process of plant construction and operation. The risk factors of Bio-technology Group, Handan Chenguang protein plant are analyzed in this paper. Meantime propose preventive measures and contingency plans. Thus offer technical assurance for the possible risk of the environment when the project launch smoothly .
The Characterization of a Pair of Canonical Frames Generated by Several Compactly Supported Functions
Authors: Wang Jun Qiu , Wang Jian Guo
Published: June 2010

Wavelet analysis has become a popular subject in scientific research during the past twenty years. We show that there exist wavelet frame generated by two functions which have good dual wavelet frames, but for which the canonical dual wavelet frame does not consist of wavelets, according to scaling functions. That is to say, the canonical dual wavelet frame cannot be generated by the translations and dilations of a single function.
A Study on Characteristics of Biorthogonal Two-Dimensional Wavelet Packets
Authors: Song De Yao , Wang Xiao Feng
Published: June 2010

Wavelet analysis is a popular subject in science research. The notion of univariate orthog- onal wavelet packets is generalized. The definition of biorthogonal nonseparable two-dimensional wavelet packets is presented and a procedure for constructing them is proposed. The biorthogonality property of bivariate wavelet packets is investigated. Two biorthogonality formulas regarding these wavelet packets are established.
The Scheduling Algorithm of Grid Task Based on Cloud Model
Authors: Gao Shu Tao
Published: June 2010

In this paper, a kind of grid task scheduling optimization algorithm based on cloud model is proposed with the characteristics of cloud model. With the target being the cloud droplets of the cloud model, this algorithm gets three characteristic values of cloud through the reverse cloud: expectations, entropy and excess entropy, and then obtains cloud droplets using the forward cloud algorithm by adjusting the values of entropy and excess entropy. After several iterations, it achieves the optimal solution of task scheduling. Theoretical analysis and results of simulation experiments show that this scheduling algorithm effectively achieves load balancing of resources and avoids such problems as the local optimal solution of genetic algorithms and premature convergence caused by too much selection pressure with higher accuracy and faster convergence.
Equipment Integrated Information Acquisition System for Production Operation in Modern Job Shop
Authors: He Yan , Liu Fei , Wang Qi Feng
Published: June 2010

Information acquisition plays an important role on the production operation of modern job shop to achieve the goals of high efficiency, good quality, low cost, little resource consumption and low environmental impacts. This paper proposes the equipment integrated information acquisition system, the objective of which is to sense or collect the on-site information related with production operation in order to support managers’ decision-making or other application systems as basic data. The system architecture is constructed with five layer components. Furthermore, the two supporting technologies of the system are presented including the adapter definition in the adapter level and the establishment of template repository in the service level. Finally, the case study of the system is demonstrated by the application of acquiring production progress information in machining job shop.
Study on Augmented Reality as a Teaching Aid for Handicapped Children
Authors: Lin Chien Yu , Hung Pi Hsia , Lin Jia Yi , Lun Hsu Chia
Published: June 2010

This study looked at the use of augmented reality to combine real scenery with virtual sound to improve the interactivity of teaching aid and provide handicapped children with a more intuitive learning method. The focus is on the development of augmented reality applications for special education. The key components are identifying tags for augmented reality, web-cam device and image processing device. The study was divided into preparation phase and experiment phase. The preparation phase was used to train teacher involved in this study while the experiment phase generated feedback from the actual use of this system by handicapped children who were the subjects of the study. The system was used for children from 4th grade to 8th grade. The design of the teaching materials offered both the teachers and the handicapped children a novel learning method.
An ANP Approach to Talent Management Evaluation Indices System
Authors: Sun Chun Ling , Bi Ran
Published: June 2010

Talent management has been regarded as a key component to organizations’ success recently. With the scope of this paper, talent management performance evaluation indices system was constructed. Analytic network process (ANP) has been adopted to model a multi-criteria talent management performance evaluation feedback system. Theoretical foundations and application processes of ANP were discussed and dependence and feedback among indices were analyzed. The result of ANP model for the indices system was obtained with Super Decisions software solution. ANP can solve problems with dependent indices effectively rather than analytic hierarchy process (AHP).
Efficient Blind Signature Scheme Based on Modified Generalized Bilinear Inversion
Authors: Zhang Jian Hong , Chen Hua , Yang Yi Xian
Published: June 2010

As a special anonymous signature, the blindness of blind signatures makes it play an important role in electronic commerce. In this paper we first propose a novel blind signature scheme from bilinear pairings. Furthermore, we also give a formal proof of security for the proposed schemes in the random oracle model. And we show that the scheme satisfies the two properties of blind signature: blindness and unforgeability. As for efficiency of the scheme, the size of our blind signature is 320 bits, and no pairings operator are required in the blind signing phas and two pairing operators are needed I the verification phase.
Multi-Objective Scheduling for Parallel Jobs on Grid
Authors: Liu Peng Fei , Dong Shou Bin
Published: June 2010

Focused on the complexity of the parallel job scheduling on heterogeneous Grid, the paper proposes a multi-objective optimization based scheduling algorithm. The algorithm first splits the parallel job up into a series of independent processes with constraints, and then adopts particles to represent the mapping of job-resource. Multi-objective PSO is employed to simultaneously optimize the scheduling objectives of throughput and average turnaround time. Experimental result indicates that the proposed approach is effective while dealing with large scale parallel jobs scheduling on heterogeneous Grid and outperforms other conventional algorithms.
The Application of Bayesian Neural Network in Rainfall Forecasting
Authors: Jiang Chuan Jin
Published: June 2010

The process of Rainfall Forecasting very complex and highly nonlinear and exhibits both temporal and spatial variability’s, In this article, a Rainfall Forecasting model using the Bayesian neural networks (BNN) is proposed for Rainfall Forecasting. The study uses the data from a coastal forest catchment. This article studies the accuracy of the short-term rainfall forecast obtained by BNN time-series analysis techniques and using antecedent rainfall depths and stream flow as the input information. The verification results from the proposed model indicate that the approach of BNN Rainfall Forecasting model presented in this paper shows a reasonable agreement in Rainfall Forecasting modeling with high accuracy.
Research on NMF Based Hierarchical Clustering Methods
Authors: Li Fang , Zhu Qun Xiong
Published: June 2010

LSI based hierarchical agglomerative clustering algorithm is studied. Aiming to the problems of LSI based hierarchical agglomerative clustering method, NMF based hierarchical clustering method is proposed and analyzed. Two ways of implementing NMF based method are introduced. Finally the result of two groups of experiment based on the TanCorp document corpora show that the method proposed is effective.
A New Privacy Preserving Approach Used in Cloud Computing
Authors: Wang Jian , Zhao Yan , Le Jia Jin
Published: June 2010

Cloud computing seems to offer some incredible benefits for communicators: the availability of an incredible array of software applications, access to lightning-quick processing power, unlimited storage, and the ability to easily share and process information. All of this is available through your browser any time you can access the Internet. While this might all appear enticing, there remain issues of reliability, portability, privacy, and security. When our private data are out-sourced in cloud computing, we should guarantee the confidentiality and searchability of the private data. Our paper provides a new approach to avoid the disclosure of the sensitive attributes of users when user ask for service from the Service Provider (SP) in cloud computing.
Performance Evaluation of Knowledgeable Employees in Knowledge-Based Enterprises
Authors: Zhang Qing Hua
Published: June 2010

As the principal body of technology innovation and the core value-creator, the high performance of knowledgeable employees in knowledge-based enterprises is the foundation of the enterprise improvement. While how to appraise and raise their performance is a difficult problem, the paper studies performance evaluation of knowledgeable employees in knowledge-based enterprises based on knowledge-based enterprises and knowledgeable employees' own characteristics, aim to set up a performance evaluation process to identify, appraise and improve the employee performance effectively. The paper also proposes several advices to appraise the knowledgeable employees.