bluuebunny/crossref_metadata_2025 huggingface dataset:
Protecting User’s Privacy from Browser-Based Attacks
Authors: He Gao Feng , Zhang Tao , Ma Yuan Yuan , Fei Jia Xuan
Published: September 2014

Recently there has been a new kind of attacks, browser-based attacks, against anonymous communication systems, such as Tor. This kind of attacks exploits JavaScript in the browser or the HTML meta refresh to generate some predefined signals to correlate users and their visited websites. A novel and efficient defense against such attacks is proposed in this paper. Our main observation is that the attacker must generate enough signals from the client site (the browser) to correlate the user and the website while we can detect the attack at the client site. More specifically, when a user is browsing a specific website and a browser-based attack is in progress, the number of outgoing flows and the total byte counts generated by the browser should be much larger compared with the normal browsing behavior. So we can set up fingerprints (number of outgoing flows and total byte counts) for normal browsing of web pages for a period of time and utilize these fingerprints to detect browser-based attacks. We have also found that some JavaScript codes must be executed many times if the attacker uses JavaScript to communicate. We have modified the Mozilla Firefox JavaScript engine to audit execution times of JavaScript code to defend these attacks, including browser-based attacks.
Research on Digital Wu Cultural Corner Construction and its Teaching Application
Authors: Dai Min Li , Wang Min , Liu Chang , Li Hong Li
Published: September 2014

As culture exhibition research platform and culture transmitting education and teaching platform, Wu Culture Corner plays a very important role in handing down and developing Wu culture, accelerating school culture construction and human resources training. However, with the vapid development of scientific research and teaching, the existing condition can no longer meet the increasing needs of numerous teachers and students. Use digital media technology to digitalize Wu Culture Corner, and based on which digital Wu Culture Corner can be constructed, and put it in throughout the teaching process, so that it can provide better serve in protecting and studying, publicizing and educating, culture transmitting. The constructing of Digital Wu Culture Corner plays a very important role in exhibiting Wu culture kernel, meeting the demands of teachers and students in teaching and studying, following the pace of culture digitalization home and abroad.
Influence Analysis of Fluid-Solid Coupling to Sensor of Microwave Resonant Cavity System for Wetness Measurement
Authors: Zhang Jun Ke , Ge Tin , Liu Jing Yu , Li Ming , Yan Xiao Zhe
Published: September 2014

The microwave resonant cavity is the sensor of wetness measurement in medium perturbation method. Local eddy current and viscous dissipation of stream will cause the temperature difference of cavity, which led to the shift of resonant frequency affecting the stability of sensor. This paper calculates the temperature distribution of cavity under conditions that varieties of steam parameters and velocity of flow by flow-solid coupling method. The thermal deformation of different conditions of cavity is calculated. The influence of thermal deformation to the resonance frequency of resonant cavity is analyzed, according to the average value of node deformation of the cavity effective surface. The results show that the average temperature of cavity and thermal deformation increase with the steam parameter increase and the offset value of resonance frequency increases. The wetness measurement scheme of wet steam on the turbine exhaust needs to improve to reduce the effect of cavity body deformation.
The Uncertainty Analysis of Microwave Resonant Cavity System for Wetness Measurement
Authors: Zhang Jun Ke , Ge Tin , Liu Jing Yu , Li Ming , Yan Xiao Zhe
Published: September 2014

Steam pressure and resonant frequency of microwave cavity are important measure parameters of microwave wetness measurement system. The measuring precision of pressure and frequency directly affect the accuracy of wetness measurement. This paper takes different pressure and wetness of steam as example to analyze the parameter uncertainty of measurement relationship and deduces standard uncertainty of wetness measurement. The system comprehensive uncertainty is identified, when the parameters measurement, cavity heat expansion, sampling error, sedimentary water film and so on are considered. The result shows that the system uncertainty is less than 0.004%. The system uncertainty introduced by pressure measurement is small and can be neglected, but the system uncertainty from frequency measurement has a great effect. The precisely measurement of resonance frequency is key to ensure the accuracy of the system.
Signal Characteristic Study and Amplifier Design of Magnetic Senor Based on Proton Zeeman Effect
Authors: Chao Tan , Su Chao , Fang Li , Jiang Bing Hua
Published: September 2014

The paper analyzes the two kinds magnetic field sensor measuring principle based nuclear Zeeman effect, the signal characteristics are analyzed according to the formula of the sensor output signal, the curve of the sensor maximum output signal VS the earth magnetic field obtained by using the method of combination numerical and experimental. With constant output signal amplitude as a criterion, the amplifier which satisfies the characteristic of the sensor output was designed. To further improve the SNR, program controllable self-tracking band pass filter (PCSTBF) was designed based on the switch capacitor filter and the FFT. The results showed that: the SNR was increased by using the amplifier which contains the PCSTBF, and the bandwidth of the output signal was not reduced.
The Design of Intelligent Measurement System Based on Time-Triggered Embedded System
Authors: Huang Feng , Bian Xin , Cao Guo Rong
Published: September 2014

An intelligent measurement system is introduced, which is based on time-triggered embedded system with the characteristics of multitask and multiparameter in the process of measuring parameters. The system is consist of MCU, USB and the time-triggered structure. The predictability makes the system avoid the interrupt loss. The stability and reliability of the system has been improved. The experimental results show that the system not only has the characteristics of flexible measurement control, data transmission, and data storage, but also can analysis the field parameters.
HP3 Automatic Measurement System
Authors: Xu Jing Bo , Zhang Jian Song , Yu Hong Tao
Published: September 2014

This paper introduce the thought of USB interface application, an automatic measurement system is as an example. The PC control system of automatic measurement by the Labview software programming, then control relay, and control the work state of the HP3. It shows that the design of USB interface application system is realized by using labview programming easy and high efficiency.
BIST-Based Method for Diagnosing Multiple Faulty CLBs in FPGAs
Authors: Wang Guo Hua , Sun Jing Lin
Published: September 2014

This paper presents a new built-in self-test (BIST) method to realize the fault detection and the fault diagnosis of configurable logic blocks (CLBs) in FPGAs. The proposed BIST adopts a circular comparison structure to overcome the phenomenon of fault masking in diagnosing multiple faulty CLBs and improve the diagnostic resolution. To test the memory block in every CLB, different TPG structures are proposed to obtain maximum stuck-at fault coverage. For the LUT mode of the memory block, the TPG based on the LFSR is designed to provide Pseudo-exhaustive testing patterns, and for the distributed RAM mode of the memory block, the TPG based on FSM is designed to provide March C-testing patterns. Besides, the comparator-based output response analyzer (ORA) and the cascaded ORA scan chain are used to locate the faulty CLB and propagate the comparison output in every row. Finally, fault-injection experiment results verify its ability to detect and diagnose multiple faulty CLBs in faulty FPGAs.
Research on Automatic Driving Control System for Coach Collision Test
Authors: Fang Qiu , Yu Jian Bin , Meng Meng , Yang Fu Qing
Published: September 2014

In order to reduce the cost of coach collision test in R & D process, coach collision test control system is designed by using automatic driving technology. The pseudo collision vehicles run along the longitudinal center line independently, till collide with fixed obstacles. In the coach, PID control theory is used to design and research the control on speed and turn, then install the controller and the corresponding sensors, which is in accordance with the requirements of impact test technology. The experiment results show that, maximum deviation of the test vehicle longitudinal center line coincidence degree is +125mm and-115mm respectively, the speed is still steady by driving straight to accelerate to the required speed of the collision, the design scheme is feasible.
The Detection of Marine Ship Target Based on GNSS-R of Stratosphere
Authors: Liu Long Fei , Zhang Qi Shan , Gu Jing Kun
Published: September 2014

Combining with the characteristics of stratosphere platform, this article introduces the marine ship target detection based on GNSS-R technology. The basic working principle is proposed for receiving the signals and detecting the marine targets, mainly from the relationship between geometry, the scattering signal characteristics, the signal reception technologies,subsequent data processing and other aspects of the possible implementation techniques. The detailed reflected signal power calculation is also given out, and calculation results show that the receiver placed on the stratosphere platform can achieve reliable target detection, and verify the feasibility of the stratosphere as a GNSS-R's receiver platform for marine target detection.
Weld Parameters Information Access Based on Laser Line Projected Image
Authors: Bi Qi Lin , Quan Yan Ming
Published: September 2014

In the guiding system for fillet welding of corrugated sheet based on laser line projection, the Laser Lines Projected on the Corrugated Sheet and Plane (abbreviated as LLP_CS_P) are interfered by the irregular width of Assemble Gap to be Welded (abbreviated as AG-W), the Scratches of the Metal Surface (abbreviated as S_MSS), the Laser Line Projected on the Welding Point (abbreviated as LLP_WP) an so on. As a solution of these problems, an algorithm and on-line processing system based on morphology are proposed to stably and accurately locate the endpoints of LLP_CS_P. First, the interferences are separated from the laser line projection. Second, the interferences are eliminated by morphology filter. Third, the locations of laser line projection at AG-W are obtained through connected component labeling and extreme theory. Image acquiring and processing on line indicate that this algorithm and system can perform stably and effectively under the condition of irregular width of fillet welding seam of corrugated sheet, scratches, welding points. The trajectory and width of welding seam are monitored on line to guide the torch to track the AG-W and adjust welding parameters adaptively.
The E-Derivative and Completeness on Circuit Error-Detection System of Differential Equations
Authors: Huang Jing Lian , Wang Zhuo , Li Juan
Published: September 2014

Through discuss the relations of e-derivative, derivative and logical functions, we propose e-derivative differential equations detective method of circuit error. We gives the theorems and proved theoretically that circuit error-detection system, which combines with e-derivative differential equations detective method and derivative differential equations detective method is having completeness, this system is able to detect all the circuit error. At the same time, we explain that the corresponding principles of the circuit error-detection system, and reveals the relationship between the circuit error and the function data (value). Finally, we give detection examples for all possible detected cases. For the present error-detection system only with derivative differential equations detective method, the circuit error-detection system which we proposed make up the deficiency and defect of the original system, which can not be detected for many circuit error and is do not know the reasons. We construct a complete circuit error-detection system.
Research on Industrial Design Materials with Effect of Symbol on Product Interface Design
Authors: Hu Zhong Yan , Cao Zai Hui , Shi Jin Fa
Published: September 2014

The semeiology’s effect on the design of the product interface is labored according to the origin of the semeiology. This paper research on Industrial Design Materials with Effect of Symbol on Product Interface Design. From lots of points of view, which are including graph, character, sound, material, color and so on, the semeiology’s effect on the design of the product interface is stated in the article.
Orthogonal Experimental Research in Milling Force of Damage-Tolerant Titanium Alloy TC21
Authors: Qin Lu Fang , Gong Xiao Nan
Published: September 2014

TC21 is a first high strength and damage-tolerant titanium alloy self-developed in China, which has independent intellectual property. As it is known to all, titanium alloy TC21 is widely used in aviation and aerospace fields. The experimental study of cutting force is a important content of machining mechanism about TC21. In this paper, the orthogonal experiment were carried out to study. The predictive model of milling force in milling TC21 was built by analysis of multivariable linear regression on the basis of experiment. Statistical test results indicated the established predictive model were in highly notable test status and had high reliability.
Internal Control Quality Evaluation Model for Information System Based on QFD and Risk Analysis
Authors: Zhang Dong Ling , Zhu Xiu Zhi , Hua Jie Qun
Published: September 2014

Internal control Quality evaluation of the information system based on the risk management is a more significant issue in the corporate governance. It presents a proposed method for the development of quality assessment and risk evaluation and early-warning for internal control of the information system, and shows the application of the ordinal logistic regression model and its advantages. It involved several steps: processing a quality design through QFD based on the customer need, building a quality evaluation index system of internal control based on risk analysis, building the ordinal logistic regression model, differentiating and analyzing the quality evaluation to reach the internal control quality evaluation result.
Analysis of Dynamic Characteristics of Automatic Transmission Shifting Control
Authors: Fu Yan Xiao , Cui Liang Yi , Xu Xiang Yang , Dong Peng
Published: September 2014

Basing on the fact that requirements for shift quality in automatic transmissions have been increasing rapidly necessitates the establishment of a suitable shifting control strategy in order to facilitate smoothness of different processes, this paper introduces a simulation model of an 8-speed automatic transmission for front-drive vehicles with respect to detailed shifting strategies and relative parameters. The transmitted torque of the oncoming shift elements before synchronization point can be reduced by an impact function in order to damp the impact and thus make the gear shifting process more smooth. This paper makes a systematic introduction of the structure of 8AT, theoretical basis of control strategy, the establishment of the simulation model and the comparison between test results and simulation results. The conclusion shows that with an accurate dynamic model, simulation results and test results are neighborhood data, the simulation model can be used to help realizing the ultimate goal of better shift quality with higher efficiency, lower shift loads and improved shifting comfort.
Cognitive Self-Optimization for Quality Control Loops – Potentials and Future Challenges in Research
Authors: Schmitt Robert H. , Permin Eike , Fuhrmann Marco
Published: September 2014

On all company levels, control loops are a proper way to control and optimize processes. As energy and resource efficiency come into focus and the increasing wish of the customer for individualized products adds even more complexity to the control task, standard control systems are unable to meet these increased demands. In the field of Self-Optimization, researchers try to enhance these control loops with more degrees of freedom by an adaption of the inner rules and objectives of the controller and the application of cognitive systems. This paper presents some promising developments that have been made in the field of self-optimization and shows which challenges research will have to face, like the missing standardization, the complexity of multi-parameter optimization, the problem of complex and conflicting goal systems and the technical risk management for non-deterministic system behavior.
Fatigue Evaluation of Autofrettaged Thick-Walled Cylinders with a Radial Cross-Bore
Authors: Li Hong Jun , Huang Xun , Liu Di , Ding Qiang
Published: September 2014

The fatigue life of autofrettaged thick-walled cylinders with a radial cross-bore is investigated by applying inelastic finite element analysis with cyclic pressure loading. A non-linear kinematic hardening model considering bauschinger effect is used for determining cyclic plastic strain ranges in fatigue evaluations. A macro is written in ANSYS to calculate the equivalent alternating stress intensity, based on the ASME Boiler and Pressure Vessel Code. For a specific cyclic load level, a distinct optimum autofrettage pressure is identified by plotting autofrettage pressure against the equivalent alternating stress intensity and the number of cycles from design fatigue data. The optimum autofrettage pressure was found in the range of 80.5%-92.5% of limit pressure. The hydrotest had little influence on the fatigue life when the thick-walled cylinder was autofrettaged with an optimum autofrettage pressure.
Structural Design and Improvement of Wind-Driven Generator Cooling System
Authors: Qian Xiao Hui , Jiang Yan Long , Cheng Dan Feng
Published: September 2014

With the world’s energy crisis aggravation, the wind turbine technology is undergoing a rapid and continual development all over the world. At present, the increase of the single-system capacity is becoming a major trend of the development of the wind turbine technology, however, how to design a cooling system to keep the whole turbine working in a allowable temperature environment is a critical problem. In this paper, a cooling system of a 3MW wind-driven generator is given and numerical simulation is conducted at 100% load, and then an improvement structure is proposed according to the calculation results. The results show that the windings and stator teeth can be cooled down effectively by the improving method. The improving cooling system removes the over-temperature problem of high temperature zone and allows the temperature of the generator to be less than the limit of 120°C as required.
Medium Density Particleboard (MDF) Produced with Pinus caribaea Fibers and Castor Oil Based Polyurethane Resin
Authors: da Silva Sérgio Augusto Mello , Gonçalves Raquel , Christoforo André Luis , Rocco Lahr Francisco Antonio
Published: September 2014

This study aimed to investigate the possibility of using castor-oil based polyurethane resin (PU), formulated with 30 % solids and 70 % solvent, in production of Medium Density Fiberboards (MDF) with Pinus caribaea fibers and two percentages of adhesive (5 and 10%). Six panels were fabricated under 4MPa pressing pressure, 190°C temperature. Initial moisture content of fibers was 9%. Properties investigated were: density of the panels; modulus of elasticity (MOE) and modulus or rupture (MOR) in static bending; and internal adhesion. Requirements of European Code EMB/IS-2 were used for comparison of results. Panels made with 10% of resin presented problems due gases expansion, disrupting the plates. For 5% resin content, mechanical properties investigated were above the requirements of the European Coded values. However, an undesirable odor prevented handling of the resin, in conditions here considered, which motivates the suggestion of new research in order to investigate different ratios between of solids and solvent contents, to completely enable the use of castor-oil based polyurethane resin MDF manufacture.
Fatigue Evaluation of Trough Splice Joints in Orthotropic Steel Decks
Authors: Yun Huang , Zhang Qing Hua , Bu Yi Zhi , Liu He Liang , Yang Shao Lin
Published: September 2014

Fatigue tests for full-scale orthotropic steel decks were conducted to evaluate and validate the fatigue performance of welded and bolted splice joints of longitudinal ribs. The test results indicated that the fatigue properties of two splice joints met the design requirements. The bolted splice joints whose principal tensile stress was largely lower than welded splice joints under the same loading conditions appeared to have superior fatigue resistance to the welded one. No fatigue cracks were detected among all the specimens and the principal tensile stress of measuring points had few changes during the whole fatigue tests. Systematic analysis of test data showed that bolted splice joints appeared to be more reasonable for improving the fatigue performance of longitudinal ribs.
Tensile Properties during Solidification of Aluminium Die Casting Alloys Grade ADC5, ADC6 and ADC12
Authors: Pongsugitwat Suvanchai , Umeda Takateru , Sricharoenchai Prasonk
Published: September 2014

In-situ tensile properties during the solidification of three commercial aluminium die casting alloys, ADC5, ADC6 and ADC12, were investigated by utilizing a high temperature tensile testing machine. Mid-length portions of the tensile specimens were melted by electromagnetic induction heating. The in-situ data was recorded in the temperature range in which the melt zone was cooling down to the solidified state and immediately after solidification. The technique allows measurement and evaluation of tensile strength and elongation of the alloys at the temperature ranges critical to many manufacturing processes. The relationship between fraction of solid and temperature during the solidification of each alloy was predicted using the Gulliver-Scheil model applied with the thermodynamic database, i.e., Thermo-Calc. Zero Strength Temperature (ZST) and Zero Ductility Temperature (ZDT) of each alloy were determined from the experiments and were correlated to the calculated fractions of solid. The morphology of the specimens’ fractured surfaces was also investigated. The tensile behavior during solidification in this study was used for characterization of hot tearing behavior in each alloy.
Characterization of Mechanical and Thermal Properties of PP/Mineral Composites
Authors: Dulebová Ľudmila , Spišák Emil , Duleba Branislav , Greškovič František , Garbacz Tomasz
Published: September 2014

The paper presents the impact of the use of fillers on the mechanical properties of composites with polymeric matrix from polypropylene (PP). Two main types of mineral fillers - talc and calcium carbonate - were used for experiments. PP composites of different percentage filler in matrix PP were compounded with twin-screw extruder and then injection molding. Properties of composites were investigated by tensile test and thermal analysis. Tensile strength was performed to determine and compare the mechanical properties of the unfilled PP and filled PP with various percentages of fillers. Thermal analysis by thermogravimetric was performed on the tested materials - weight loss, glass transition temperature, thermal decomposition, melting temperature.
Size Effect of Recycled Material to Tensile Properties of PC
Authors: Senkerik Vojtech , Stanek Michal , Manas David , Manas Miroslav , Skrobak Adam , Navratil Jan
Published: September 2014

The aim of this research paper is to study the effect of particle size of recycled polymeric material to mechanical tensile properties. During grinding particles are formed which have a different size, shape and surface, from larger pieces to dust particles. During processing these particles melt at different rates depending on their size. For example they can cause material degradation or lack of melt homogeneity. Several recycled mixtures were prepared that had differed particle size after crushing. The recycled material is always the same as is the original material. The studied material was a Polycarbonate. Testing was performed using a tensile test. When comparing a virgin polycarbonate with recycled mixtures, the particle size of the recycled material affects some of the material parameters quite substantially, but it had no effect on some other properties.
Particulate Composites with Wastes from Treated Wood and Tire Rubber
Authors: da Silva Bertolini Marília , Christoforo André Luis , Calil Neto Carlito , Rocco Lahr Francisco Antonio
Published: September 2014

The segment of wood preservation is responsible for considerable waste generation, typically consisting of products not approved by quality control or post-consumer. Another type of waste to be considered is tire rubber, which accumulate due to deficiencies in logistics and fiscalization. Although it has been classified as intractable, tire rubber enables to add properties in products that promote the use of materials in particulate form. This study aimed producing and characterization of particulate composites containing CCB-treated Pinus sp. with addition of tire rubber, and castor oil-based polyurethane resin. Properties of particleboards were obtained according to Brazilian Code NBR 14810:2006. The results were compared by statistical analysis. It was observed that addition of tire rubber waste resulted in higher densities, and rubber proportion of 50% showed greater internal bond. In some cases, strength in bending of panels was in accordance with standards requirements and commercial products destined for acoustic conditioning, enabling different applications.
The Influence of Cross-Section Shape Changing on Work of Cold Formed Beam
Authors: Tusnin Alexander , Selyantsev Ilya
Published: September 2014

The Necessity of taking into account the ability of cold-formed steel thin-walled profiles to gradually change its cross section shape proportionally to the load acting on it is considered. Free torsion constants Jt value for cold-formed profiles is justified. Underestimation of beam torsion due to ignoring of the cross-section contour deformation is assessed. The thin-walled Z and C-shaped cold formed steel sections recently are becoming more and more popular in the constructions of low-rise buildings. A characteristic feature of cold-formed thin-walled profiles in these structures is the need to consider not only the longitudinal and bending deformations, but also the deformations of torsion. Presently there are two approaches to analysis of structures of thin-walled cold-formed steel sections. One of them is based on the thin-walled beam theory designed by V.Z. Vlasov, another one is based on the super-critical load-carrying capacity theory. In the first approach the contour of the cross-section is non-deformable, in the second caseanalysis is carried out on the basis of a reduced cross-section, caused by local buckling of the compressed cross-section elements. Both approaches do not take into account the ability of cold-formed steel thin-walled profiles to change itscross section shape proportionally to the load acting on it. In this connection it is necessary to conduct theoretical and experimental studies of the cross-section deformation effect on behavior of cold-formed steel profiles.First of all,it is important to find out the range of section-length characteristics for cold-formed profiles in which the fact of not taking into account of contour deformation of the cross-section leads tothe significant, from an engineering point of view, error in the calculations. Also it is needed to estimatehowload types and connections applied on cross section influence on cross-section form changing.
Nanohardness of Electron Beam Irradiated HDPE
Authors: Manas David , Ovsik Martin , Manas Miroslav , Stanek Michal , Kocman Karel , Bednarik Martin , Senkerik Vojtech
Published: September 2014

Micromechanical changes in the surface layer of High-density polyethylene HDPE modified by beta radiation were measured by instrumented test of nanohardness. The specimens were prepared by injection technology and subjected to radiation doses of 0, 132, 165, 198 kGy. Measurements of nanohardness showed considerable changes of behavior of surface layer in middle as well as high radiation doses with higher values of indentation hardness and stiffness.
Effect of Beta Low Irradiation Doses on the Filled PA66 Measured by Micro-Indentation Test
Authors: Ovsik Martin , Manas David , Manas Miroslav , Stanek Michal , Reznicek Martin , Kratky Petr
Published: September 2014

The presented article deals with the research of micro-mechanical properties in the surface layer of modified Polyamide 66 filled by 30% of glass fibers. These micro-mechanical properties were measured by the Depth Sensing Indentation - DSI method on samples which were non-irradiated and irradiated by different doses of the β - radiation. Radiation doses used were 0, 15, 30 and 45 kGy for filled Polyamide 66 with the 6% cross-linking agent (triallyl isocyanurate). Individual radiation doses caused structural and micro-mechanical changes which have a significant effect on the final properties of the polyamide 66 tested. The highest values of micro-mechanical properties were reached at radiation dose of 30 kGy, when the micro-hardness values increased by about 64%. The aim of the article is to find out the influence of the radiation on the micro-hardness of the modified glass fiber-filled Polyamide 66 (PA66).
Effect of the Calcination Temperature on Ni2P/TiO2-Al2O3 Catalyst Structure and Catalytic Activity for Hydrodesulfurization
Authors: Li Feng , Jin Zai Shun , Song Hua Lin , Li Yong Sheng , Xu Jian Zhong
Published: September 2014

Nickel phosphide Ni2P catalysts supported on TiO2-Al2O3 support were prepared by co-impregnation. The catalysts were characterized by XRD, BET, and XPS. The effects of calcination temperature on catalyst structure and HDS activity were studied. The results indicated that the catalyst prepared with calcination temperature of 773 K exhibited the best performance. At a reaction temperature of 606 K, a pressure of 3.0 MPa, a hydrogen/oil ratio of 500 (V/V), and a weight hourly space velocity (WHSV) of 2.0 h-1, the conversion of DBT HDS was 96.0%.
Physical Characterization of Particleboard Produced with Waste from Ethanol and Sugar Mill
Authors: Batistelle Rosane A.G. , Valarelli Ivaldo D. , Christoforo André Luis , Rocco Lahr Francisco Antonio , Chahud Eduardo , Branco Luiz A. Melgaço N. , Bezerra Barbara Stolte
Published: September 2014

The problem of proper disposal of solid waste generated in different industrial processes is one of worldwide environmental concerns nowadays. Thus, this study aimed to establish a new alternative for the disposal of two agro-industrial residues employing them to produce particleboard for different purposes in building construction. The focus was given to the reuse of the sugarcane bagasse (SB) originated during the processing of Saccharum officinarum for sugar and ethanol production, and bamboo stem leaves of Dendrocalamus giganteus(BB). For this, six particleboards were produced in the following compositions: with 100% SB, 75% SB + 25% BB, 50% SB+50% BB, 40% SB +60 BB, 25% SB+ 75% BB and 100% BB in the total mass of the composites. The particleboards physical characterization followed Brazilian Standard ABNT NBR 14810-3 to density, moisture content and water absorption. Results showed these raw materials are compatible to particleboard production.
Physical and Mechanical Properties of Dipteryx odorata (Aublet) Willd
Authors: de Almeida Diego Henrique , Chahud Eduardo , Ferro Fabiane Salles , Poleto Sabrina Fernanda Sartório , de Almeida Tiago Hendrigo , Christoforo André Luis , Rocco Lahr Francisco Antonio
Published: September 2014

The aim of this work is to determine the main mechanical properties, related to timber structures design, of the Brazilian tropical wood specie: Dipteryxodorata (Aublet) Willd. Tests were conducted according to the guidelines of the Brazilian Code ABNT NBR 7190: 1997 "Design of Timber Structures". Specimens were obtained from a so-called homogeneous clear wood lot, with moisture content around 12% . Mean values ​​of strength and stiffness properties confirmed Dipteryxodorata (Aublet) Willd as a good alternative for structural uses.
Life Cycle CO2 Emission Assessment for Non-Steam Curing Precast Concrete
Authors: Kim Taeh Young , Tae Sung Ho , Yang Keun Hyeok
Published: September 2014

Researches on development of technology to reduce CO2 emission while satisfying physical properties during production of precast concrete, which is mainly applied to building structures, are necessary. Accordingly, a high early strength type mixture for which removal of precast concrete form can be done by curing at room temperature instead of steam curing in the production process of precast concrete was developed. The developed high early strength type mixture was mixed with concrete to conduct coagulation, slump, and compressive strength property tests. In addition, CO2 emission and reduction performance of non-steam curing precast concrete were assessed.
Ionizing Radiation Effect of HDPE Measured by Nano-Hardness
Authors: Ovsik Martin , Manas David , Manas Miroslav , Stanek Michal , Skrobak Adam , Kratky Petr
Published: September 2014

This article deals with the influence of different doses of Beta radiation on nanomechanical properties of High-density polyethylene (HDPE). These nanomechanical properties were measured by the Depth Sensing Indentation - DSI method on samples which were non-irradiated and irradiated by different doses of the β - radiation. The highest values of nanomechanical properties were reached at radiation dose of 99 kGy, when the nanohardness values increased by about 23%. The purpose of the article is to consider to what extent the irradiation process influences the resulting nanomechanical properties measured by the Depth Sensing Indentation method.
Preparation of Iron Catalysts Generated from Fe-Coagulated Sludge Produced by Ferric Chloride Coagulation of Wastewater
Authors: Foowut Supranee , Palothaisit Tawanrat , Boonlor Natthadabhorn , Prompinit Panida , Viravathana Pinsuda
Published: September 2014

In this work, the FexOy catalysts were prepared by the co-precipitation method. The catalysts were characterized by X-ray diffraction (XRD), X-ray absorption spectroscopy (XAS), and Brunauer-Emmett-Teller (BET) surface analysis. From XRD results, the FexOy with the wastewater to coagulant ratio of 1:2 catalyst (FexOy-1:2) calcined at 600 °C for 6 h showed the presence of the wustite (FeO) form. XANES analysis showed the phase of FeO in FexOy-1:2 calcined at 600 °C for 6 h which corresponded to the result from XRD. The FexOy 1:1 catalyst had higher specific surface area and larger total pore volume compared to the FexOy 1:2 catalyst.
A Fundamental Study on the Processing of Heavy Metals Contained in Underground Water by Composite Modulation Electromagnetic Field Processing
Authors: Ha Sang An , Kim Dong Kyun , Lee Dong Won , Jung Byong Ho , Lee Jong Moon , Wang Jei Pil
Published: September 2014

The present study is aimed at deriving study factors appropriate for removal of heavy metals in a region with combined contamination of non-biodegradable organics or heavy metal ions in soil or underground water contamination or a region with underground water contamination using a composite alternating current electromagnetic field with combined modulation of an electric and a magnetic field. In addition, it is directed at deriving fundamental experiment, design factors that can be utilized in removing organic contaminants or metal-organic complexes having polarity of an electric charge. The continuous-type apparatus for fusion process in a composite alternating current electric field employed in the present study was designed to process a maximum of 260 L. Each configuration is provided with electrolytic decomposition apparatus, Magnetic Equipment, Power supply and Electrode plates with an adjustable distance between electrodes. By measuring oxidation and reduction processes of ions appearing in chemical reaction processes, electric potentials produced by injection of a negative reactivity electrode into an aqueous solution in a reversible redox equilibrium condition were measured.
Buckling Behavior of Catheter Reinforced with Braids under Combined Loading of Axial Compression and Torsion: Effect of Displacement Speed on Buckling Region under Proportional Deformation Path
Authors: Kato Yasuyuki
Published: September 2014

The purpose of this research is to investigate the mechanical property of catheter, which is made of soft nylon resin and is reinforced with thin stainless wires called braid. In this paper, the relation between the deformation speed and the buckling phenomenon is examined by using the catheters which have a viscoelastic property. If we image the actual usage, the different types of several loads such as torsion and bending are applied simultaneously to the catheter. Thus, it is expected that the buckling phenomenon of the catheter will be more complicated. In this study, as the initial step to reveal the buckling behavior under combined loading state, the buckling tests under combined loading of compression and torsion are carried out under the proportional deformation path by changing the speed of axial displacement and the torsional angle. And then, the effect of the stress relaxation on the occurrence region of buckling under combined loading state is revealed in this paper.
Vibration and Load Suppression of Offshore Floating Wind Turbine
Authors: He Er Ming , Hu Ya Qi , Zhang Yang , Yin Ge Liang
Published: September 2014

The application of tuned mass dampers (TMDs) to offshore wind turbines has a huge potential to suppress the large vibration responses of these systems. Control module of TMDs is added into the wind turbine structural dynamics simulation code FAST and fully coupled aero-hydro-TMD-structural dynamics model of the 5MW Barge-type floating wind turbine by National Renewable Energy Laboratory (NREL) is established. A multi-parameter optimization study is performed to determine the optimal parameters of a fore-aft TMD system in the Barge-type model. The wind turbine model equipped with the optimal TMD is then simulated under five typical load conditions and the performance of the new system is evaluated. The results show that longitudinal loads at tower base and deflections at tower top reductions of up to 50% and longitudinal loads at blade root and deflections at blade tip reductions of up to 40% are achieved, which indicates that the optimal TMD can be used to suppress the vibration response of offshore wind turbines and also demonstrates the potential for TMD structural control approaches.
Simulation of Interference Characteristics of the Model Supporting Beams with Different Forms of Section in Wind Tunnel Test
Authors: Hu Xing Jun , Miao Yue Xing
Published: September 2014

In order to study the effects of the supporting beams with different forms of section on the aerodynamic characteristics of car models. Model supporting beams with three different forms of section were designed based on standard MIRA model. The commercial CFD software - Ansys Fluent was used to simulate the three-dimensional flow field around the standard MIRA model installed with three different kinds of supporting beams. With comparisons between the drag coefficients, pressure distributions and velocity distributions around the wheels with the different supporting beams, the reasons for the differences in aerodynamics are analyzed and advices were given for helping choosing the supporting beam with minimal disturbance to reduce the correction error.
Eigenvector Centrality Measurement Using Patent Information of Wind Power Energy
Authors: Kwon Young Il , Jeong Dae Hyun
Published: September 2014

Wind power generator produces electric energy using wind. Since fuel for operating a wind power generator costs almost nothing, it is receiving attention as a power generator for the next generation. A wind power generator consists of a device that absorbs and converts the energy of wind power, power train, and control device. Each element is connected as a whole while it performs its function. In this study, we used the patent IPC information related to segmented technologies of this wind power generator to establish a two-mode network, measure eigenvector centrality value and identify the field with the highest influence among the fields of wind power energy. In the result, the field of generator was found to have the highest influence, followed by operation system and blade. It was analyzed that the field of generator had the highest influence since H02K and H02P, the IPC codes in the field, were the important technologies that influenced on other fields. In addition, H02N and H02N, which are main IPC codes in the field of solar cell, were analyzed to have connection with the field of generator.
Pre-Stressed Modal Analysis of the Shaft Based on ANSYS Workbench
Authors: Song Xin Wang , Wu Yan , He Yu An , Chen Fu Yang
Published: September 2014

This paper is based on the research on the drive shaft of the toothpaste tube conveyor, using Solidworks to create the three dimensional model of the frame of the soft tube conveyor and the drive shaft. And natural frequencies and vibration modes of preceding 6 modalities of pre-stress modal analysis are calculated with ANSYS Workbench. By analyzing the natural frequencies of the drive shaft and the resonance range of stepper motors, the reasonable speed range of the stepper motor can be acquired, in order to avoid the resonance between the drive shaft and stepper motor. At the same time, the reasonable installation location of synchronous belt wheels can be attained by analyzing each vibration mode.
Stability Analysis of Rectangular Thin Walled Structure under Nonlinear Distributed Stress
Authors: Yu De Hui , Hou Yong Fa , Sun Jing
Published: September 2014

The stability of rectangular thin wall with 3 simple supported sides and 1 free side, subjected to nonlinear distributed stress, is analyzed. Galerkin method is applied in order to study the internal relationship between the critical thickness and nonlinear stress. Under the same stress circumstance, as the a/b ratio gets larger, the critical thickness for the thin wall structure getting buckled grows too. The influence of different material properties on the critical thickness is also researched. The method proposed in this paper is applicable for more complicated distributed stress and also can provide some reference criterion for design of thin wall structure.
Age-Hardening Behavior of Pd-Ag-Sn-In-Zn Alloy
Authors: Wu Hai Jun , Zuo Xiao Qing , Wang Ying Wu , Zhang Kun Hua , Chen Yu Zeng
Published: September 2014

Pd-Ag-Sn-In-Zn alloy was subjected to isothermal aging treatments at 400°C, 500°C, and 650°C. Age-hardening behaviour and related microstructure changes of the aged alloy were studied by means of hardness test, X-ray diffraction (XRD), scanning electron microscopic (SEM) and energy dispersive spectrometer (EDS). The results indicate that the hardness of the alloy reaches a highest value of 348Hv after aging at 650°C for 20min. Further increasing the aging time leads to softening. The hardening of the alloy at early stage of the age-hardening at 650°C is ascribed to the formation of lamellar (α1+ β) precipitates along the grain boundaries of α matrix. The softening of the alloy occurred by further increasing aging time is caused by the coarsening of the precipitates.
The Research on the Error Correcting Method for Acoustic Measurement the Missing Distance of Moving Areal Target
Authors: Qi Xiao Wei , Liu Hong Yi , Gao Hong Ju , Dong Jia Xin
Published: September 2014

In this paper, the effects on measurement missing distance due to the movement of target are analyzed, and the new method for missing distance measurement error correcting based on space coordinates correction is studied. With the optimal one-dimensional search algorithm in the miss distance calculation obviously increase the processing speed. The simulation results show that this kind of error correction method can effectively reduce the miss distance measurement error.
Research on Automatic Checking of Protection Functions for Smart Substation
Authors: Lu Yan , Zhang Yan Peng , Tian Ye
Published: September 2014

The considerable variability of architecture and function realization of smart substation, which differ from traditional substations, makes the range of protection function check no longer restricted to one device, so it is necessary to carry out thorough monitoring and testing for various inks of functional implementation [1-2]. For this purpose, the automatic checking of protection functions for smart substation is researched, and a scheme for the implementation of the automatic checking is designed [3-4]. By means of adding various checking manners to application software implementation of the devices of protection system for smart substation, the checking and detection of various function implementation links of the protection system are performed, and by use of the expert system based on Dempster-Shafer theory a real-time virtual checking scheme is configured and through real-time analysis on checking information the conclusion of the checking is obtained. The proposed scheme enhances the self-diagnosis and self-monitoring ability of protection system for smart substation and gives full play to the superiority in digital information acquisition and information interaction of digital substation, so it can be used to the checking during on-site commissioning, besides, partial functions can be also used to perform on-line monitoring of protections being operated [5-9].
Advanced Applied Research of Smart Substation Based on Multi-Element Data
Authors: Zhang Wu Yang , Wang Cheng Gang , Yang Fei , Yu Tong Wei , Lu Yan
Published: September 2014

The real time synchronous sampling of large basic data information and the networking information sharing have laid necessary foundation for smart substation advanced application. The advanced application of smart substation is the multi-index optimization analysis and control strategy research which based on digitization of information transmission and networking of information sampling. This paper aimed at health state analysis and control strategy research of substation equipment and network environment, which based on the theory of multi-element data analysis and double network and double measuring and control.