bluuebunny/crossref_metadata_2025 huggingface dataset:
The Manufacture and Nutritional Analysis of the Dioscorea batatas F.flablla.Makiro Jam with Material Properties
Authors: Hu Guo , Hu Shang Qin , Wang Han Chen
Published: March 2013

Dioscorea batatas F.flablla.Makiro, jam , nutrition , process, analysis Abstract: In the present study the Dioscorea batatas F.flablla.Makiro was used as the raw material to further exploitation and utilization and carry out the intensive processing of it. After cleaning and grinding into sauce and mixing with the supplementary material , and sterilizing the Dioscorea batatas F.flablla.Makiro jam was bottled and the nutritional of the ingredient of the jam was analysised by chemical and instrumental method. The results indicated that the Dioscorea batatas F.flablla.Makiro jam's color was bright and light red brown. Its flavor was tasty and the nutrition was rich. The protein content was 3.35%, including 17 kinds of amino acids and 8 kinds of essential amino acids needed by the human body. The fat was 1.81%, as well as the rich mineral substances and the vitamin. The Dioscorea batatas F.flablla.Makiro jam was one of the nutritional condiments for the old and the young. This study provided a theoretical and practical foundation for further exploitation and utilization of the Dioscorea batatas F.flablla.Makiro.
Methods of Errors Analysis in Assembly of Dicing Saw in Silicon Devices with Material Properties and Applied Mechanics
Authors: Ma Yan
Published: March 2013

Mainly introduce the work principle of Dicing Saw and the different kinds of errors in assembly ,analyze all errors which influence LCD glass ; draw the picture according to the measuring data ,from the picture estimate the errors how to come from and prove that the judgments is true through calculating the rigidity of liner bearing ;find the source of the main error ,appoint out how to take measures for the errors and what is the key point in the assemble. This errors analysis method of the applied mechanics play an important role in other Dicing Saw assemble and test .
Equivalent Stress Analysis of Piercing Process in Diescher’s Mill Using Finite Element Method
Authors: Lu Lu , Wang Zhao Xu
Published: March 2013

In this paper, the simulation of the piercing process is performed by the three dimensional finite element method in Diescher’s mill. After a short description of the problem the numerical model of the process is described. The simulated results visualize dynamic evolution of equivalent stress, especially inside the work-piece. The non-uniform distribution of stress on the internal and external surface of the work-piece is a distinct characteristic of processing tube piercing. And it is the basic data for improving tool and design, predicting, damage and controlling the micro-structural evolution of processing tube piercing.
Studies on Oxidation of Adrenaline Using Encaged FePc in Y Zeolite as Catalyst
Authors: Li Ming Tian , Yang Rui Song , Lin Li
Published: March 2013

The oxidation of adrenaline (AD) using iron phthalocyanine encaged in Y zeolite (FePc/Y) as catalyst was investigated by UV-Vis spectroscopic analysis. The influence factors of catalytic efficiency, such as catalytic time and temperature, the pH value of solution and the amount of FePc/Y, have been investigated. The results indicated that AD could be effectively catalyzed by FePc/Y.
Ground Source Heat Pump Application in Cold Areas for Energy Conservation
Authors: Ran Chun Yu , Yan Bo Jiao
Published: March 2013

This essay briefly introduces the heat pump technology, analyzes the characteristics of this technique in energy conservation and environmental protection, illustrates the feasibility and superiority of the application and popularization of the ground source heat pump in severe cold and cold areas, whose cold and heat sources are based on the Soil, finally points out problems which exist in the technology and puts forward the solution to it.
Waveform Acquisition and Playback System in Electrical Energy for Energy Saving Based on STM32 Design
Authors: Dong Chun Xia
Published: March 2013

The design of the use of meaning law semiconductor introduced 32 bit low power processor STM32, can effectively improve the data processing and transmitting velocity storag improving the stability of the system, and can reduce the power consumption, so as to achieve the purpose of saving energy. Also uses dual channel input, one channel is used for collecting the known frequency and amplitude of the waveform, the other channel is a collection of changes in the waveform, in practical application can be cut, thus solving the fixed waveform acquisition channels are relatively simple, and the variable waveforms that are relatively complex contradiction, make the system clean and stable.
Analysis on Heat Source Operation Scheduling of Coal Fired and Gas Fired Source Co-Heating System
Authors: Zhou Zhi Gang , Wang Peng , Zou Ping Hua
Published: March 2013

As a kind of clean energy, gas heat source will play more and more important role in the future heating system. However, the research for the heat source optimization and dispatch of coal fired and gas fired source co-heating system is quite few in china. In this paper, the characteristic of coal fired and gas fired source co-heating system is proposed, and formulas and parameter selection method for the typical heat source operation scheduling schemes were given. By taking an actually heating network as an example, procedure and method for some heat source dispatch schemes are provided, and the optimal operating scheme based on technical and economic analysis is given. The method provided in this paper may supply the theoretical basis for operation scheduling of realistic engineering heating network. It is very meaningful for saving energy and improving environment.
Comparison between Numerical Simulation and Analytical Calculation of Heat Loss and Temperature Profile of Buried Pipes
Authors: Wang Peng , Zhou Zhi Gang , Li Yang , Zou Ping Hua
Published: March 2013

The fictitious thermal source (FTS) method has always been the popular analytical way to solve heat transfer of buried pipes. Aiming at complicated conditions, simplified model and procedure based on the FTS method often casts doubts upon the results. Therefore, a numerical simulation method with circle boundary condition is validated comparing to the accurate temperature profile of buried steel pipe without insulation calculated by the FTS method. Then, the simulation method is used to verify calculation error when solving insulated pipes by the FTS method. The comparison shows that it is difficult to obtain accurate temperature profile for buried insulated pipe by the FTS method. However, the average temperature and heat loss are more precise and can be used to solve complicated problems by the analytical method.
Study on the Practice of Electrical Controlling with Mechanical Properties and Engineering Properties
Authors: Shang Xiao Mei , Li Zheng , Sun Hui Qin
Published: March 2013

In this paper, we analyze the work principle and control principle of floating panel board type clutch and brake of mechanical press. We focus on analyzing the clutch and brake compatibility test and control. In addition to this, various production machinery drag in most of the motor as power. Motor is controlled through some automatic mode. The most common control mode is relay and contactor, also called electrical control. It is an important part of automatic control. The practitioners must be familiar with this part of knowledge and improve the practical ability. In the electrical control training, we should take positive and effective methods, design the task reasonably, make project and broaden the thinking, to reach the ideal experimental effect.
Shrew Attack on Internet Congestion Control Protocol in Control Engineering
Authors: Ma Jian Hong , Ji Li Xia
Published: March 2013

Low-rate Denial of Service(LDoS) attacks with their hidden,high efficiency features can significantly degrade service performance of large number of connection-oriented services,or even worse,thoroughly deny the services.Shrew attack is a typical LDoS attack.Firstly we studied the basic mechanism of the attack and congestion control.The source of adaptive congestion control mechanism in the security vulnerability was revealed according to the different levels of the intrinsic link between Internet congestion control at TCP layer and IP layer.Secondly,using the Network simulator NS2 software package,we set up attack model to simulate a large number of attack experiments with various congestion control mechanism and algorithms.Finally we draw the conclusions that continuous Shrew attack makes services nearly crash,while congestion control algorithms taking into account of fairness,such as Stochastic Fairness Queuing (SFQ) and Deficit Round Robin (DRR),can effectively suppress such kind of attack.
Design of Vehicle Taillight Circuit with Mechanical Properties in Mechanical Engineering
Authors: He Juan , Kang Shuai
Published: March 2013

The vehicle taillights control circuit with mechanical properties is composed of a clock pulse circuit, a switch control circuit, three hexadecimal circuit, decoding and display drive circuit, taillight display. The circuit is simulated with Multisim. The simulation results show that vehicle taillight display can make pedestrians and other vehicles understand clearly the occurrence of the vehicle’s dynamic change, thus which can prevent the occurrence of traffic accidents effectively.
Study on Electric Differential Control Scheme for Electric Vehicles
Authors: Song Hong , Huang Xiao Long
Published: March 2013

In order to improve control performance of the electric vehicles independent motor driven wheel steering , using the Ackerman angle relation to design electronic differential system of electric vehicles based on DSP2407 . This control strategy considering various pavement condition and slip rate, will be able to realize the electric vehicles in the complex road conditions, and have fast response requirements. Electronic differential controller of electric vehicles based on DSP2407 can deal with between speed of body and Angle of the nonlinear relationship effectively, when steering operation, is about to drive wheel with input different torque, realized the good adaptive differential, and has advantages of good real-time performance and strong robustness etc.
Influence of Bulk Concentration on the Discontinuous Transition in Surface Segregation
Authors: Li Xin Yi , Lin Min , Chen Xu , Huang Chi , Li Yan Xiu , Wang Jiang Yong
Published: March 2013

The discontinuous transition of surface concentration due to the change of bulk concentration in isosteric/isothermal surface segregation has been discussed quantitatively according to the modified Darken model. The criteria for observing the discontinuous transition in surface segregation has been derived on the basis of the Bragg-William expression.
Direct Current-Controlled Distribution Static Synchronous Compensator for Voltage Quality Improvement
Authors: Huang Lei , Yang Deng Xiang , Tang Jie , Zhu Qun Feng
Published: March 2013

This paper presents a direct current-controlled static reactive power compensator (DSTATCOM) for voltage quality improvement of low-medium distribution network. The main circuit of the DSTATCOM uses VSI-SPWM structure-based voltage source inverter (VSI), and both operation of reference current and control of compensation current are realized in synchronous reference frames. The function of DSTATCOM to mitigate voltage sag and flicker, two common voltage quality problems, is discussed in detail in this paper. According to the forming way of reactive reference current, operation mode of DSTACOM are classified into current control mode and voltage control mode. And under the two operation modes the function of DSTATCOM to mitigate voltage sag and flicker under different control modes is simulated with MATLAB. The simulation results show that the current control mode is suitable for mitigating voltage flicker, while the voltage control mode for voltage sag.
Study on Drought Resistance Engineering with Certain Engineering Materials and Improved Information Diffusion
Authors: Xiang Xiao Jun , Li Qiong
Published: March 2013

Drought is a most serious hazard to life and property. In arid and semi-arid region，we must make rational use of the short water resources , and use all sorts of drought resistant material to improve water use efficiency, so scientifically solve the water environment problem of the plant. This paper proposes the use of super absorbent polymers and drought resistant material to improve the arid region of environmental problems. And the traditional probability statistical method is acceptable in analyzing the drought risk but requires a large sample size of hydrological data. This paper also puts forward an improved method based on information diffusion method for drought analysis. Information diffusion theory helps to extract as much useful information as possible from the sample and thus improves the accuracy of system recognition. Furthermore, information diffusion theory helps to extract as much useful information as possible from the sample and thus improves the accuracy of system recognition. This technique contributes to a reasonable prediction of natural disasters risk.
Energy Conservation and Environmental Protection for Green Traffic in China with Development Strategies
Authors: Chen Lei
Published: March 2013

The world has faced to the double jeopardy of energy shortage and environmental deterioration because of the rapid growth of automobile usage and petroleum resources consumption and more and more urban population. China is also been dogged deeply by the problems such like traffic congestion, air pollution and energy shortage. So energy conservation and environmental protection for green traffic in China with development strategies is very important.
The Research on the Corrosion Inhibition Rate of CTAB Combined with Sodium Silicate on the Q235 and 316L Steel
Authors: Yang Rui Song , Li Ming Tian
Published: March 2013

In this paper the corrosion inhibition of cetyl trimethyl ammonium bromide (CTAB) combined with sodium silicate on the Q235 and 316L steel were investigated. The results showed that CTAB has a higher corrosion inhibition rate but the cost is higher also. In order to lower the cost, the sodium silicate was combined with CTAB to be corrosion inhibitor. The Results showed that once the CTAB was combined with sodium silicate, there would be a synergistic effect between sodium silicate and CTAB. The corrosion inhibition rate could be greater than 80%. Especially when the concentration ratio of CTAB to sodium silicate was 0.02g/L:2.00g/L, the corrosion inhibition rate for the 316L and Q235 could be up to 87.04% and 91.03% respectively.
A Study on the Activation Effect of Fluorgypsum by Physical and Chemical Modification
Authors: Pan Hong , Li Guo Zhong
Published: March 2013

This article used the grinding treatment as a physical modification method, and the effect of different grinding times on fluorgypsum was studied. Calcined alum, potassium sulfate, and sodium oxalate were selected as fluorgypsum chemical activators, and their effects on the fluorgypsum hydration process, strength, and hardened-body microscopic morphology were investigated, respectively. The results could be showed as follows: when the grinding time was 30min, the residue of fluorgypsum on 80 mesh sieve accounted for 6.8% and the water demand for normal consistency reached a minimum of 30%; three activators could accelerate fluorgypsum hydration process varying degrees.
The Performance Study of Light Foam Concrete
Authors: Zhao Huan Qi , Li Guo Zhong
Published: March 2013

Ordinary Portland cement is gelling agent. Fly ash was used to replace part of the cement. Light foamed concrete joining physical foaming was produce. The effects of foam dosage on bending strength, compressive strength and coefficient of thermal conductivity of foam concrete were investigated. The results indicate that the increase of the amount of foam can greatly reduce the dry density of foam concrete. When foam dosage is 1.5 L/kg, we can produce light foamed concrete having certain intensity. Its dry density is 424 kg/m3, and heat conduction coefficient is 0.095 W/mk.
Defects of Insulation Systems and their Negative Effect on the Accumulation and Energy Saving
Authors: Vlček Pavel , Kubečka Karel , Kubečková Darja , Vaculíková Hana
Published: March 2013

Defects in heat insulation systems caused by incompliance with the prescribed technological procedures and by human error in the course of their implementation negatively affect energy accumulation and saving. The result is thermal bridges and lower energy saving than expected in the stage of heat insulation project preparation.
Study of Behaviour of Advanced Silicate Materials for Thermal and Moisture Rehabilitation of Buildings
Authors: Zach Jiri , Korjenic Azra , Hroudová Jitka
Published: March 2013

The article describes the results of research work carried out in cooperation between the Faculty of Civil Engineering in Brno and the Faculty of Civil Engineering in Vienna concerning the development and study of the behaviour of heat-insulation plasters on a silicate basis, in particular in the area of the transfer of heat and moisture in their structures. The main objective was to determine the capillary activity of the thermal moisture behaviour of the developed materials which can be source material for the further part of the research solution addressing the simulation of the behaviour of these thermal-insulating plasters in real constructions.
Analysis of Environmental Impacts on Thermal Conductivity of Insulation Block from Secondary Raw Materials
Authors: Kalužová Alena , Pěnčík Jan , Matějka Libor
Published: March 2013

Due to tightening requirements for thermal protection of buildings, the development of new materials with good thermal insulation properties is supported. Correct design of structural details leads to the elimination of thermal bridges and to the improvement of the indoor environment. Thermal conductivity of materials is not constant, is influenced by many factors. In addition to density and bulk density, structure and composition of material, it depends mainly on the humidity and temperature of the material. In the framework of sustainable construction, emphasis is placed on reduction of natural resources consumption, saving of energy and minimization of the harmful effects resulting from the processing of primary raw materials. Also one of the greatest problems of today is waste disposal. The simplest option in terms of technology and economic costs is a landfill. Many materials - in particular waste polymers - subjects to chemical changes very slowly. Therefore there is a support of the efforts to extend the product life cycle through recycling. Thermal insulating blocks made from secondary raw materials, described in this paper, are one of the solutions to this problem.
Computer Simulations of Room Acoustics in Sporting Facilities
Authors: Kolářová Zuzana , Šteffek Libor , Vajkay František
Published: March 2013

The paper is focused on a solution with regards to acoustic problems inside of facilities for sporting activities. The evaluation of the acoustic parameters of the interior was done within a project called "Badminton Centre with Facilities", which was part of a master thesis at the Institute of Building Structures of the Faculty of Civil Engineering, BUT Brno. The given solution and design took into account not only the requirements given by the legislation dealing with building acoustics, but the aesthetical viewpoint of the individual acoustically absorbing surfaces also. The simulations were done in Odeon Auditorium software, which is specialized for the modelling of indoor spaces of buildings. The results of simulations are presented in octave bands with a frequency range of 250-2000 Hz, while the main emphasis is put onto the monitoring of the reverberation time.
Differences Ug - Values of Glazing Measured In Situ with the Influence Factors of the Internal Environment
Authors: Flimel Marián
Published: March 2013

This paper presented the results of experiments to determine Ug values of heat transfer coefficient on glazed window in the apartment block during heating period. For assessing the values of heat transfer coefficient of the window glazing was used heat flow measurements. Measurements are performed with optimal conditions (without the internal effects of environment) and the other hand with real conditions, when factors such as noise or artificial light affect on the construction of the glazing. Differences Ug - values is demonstrated by comparing the partial results due to transformation of noise and luminous energy from an internal environment to the heat flow in window glazing.
Envelope Structures of Low Energy Wooden Houses Considering Indoor Climate
Authors: Štefko Jozef , Bebej Daniel , Bednár Jozef
Published: March 2013

Present constructional systems and architecture designs of wood based buildings with extreme thermal insulations and compositions, which are different from those commonly used so far, bear positive as well as negative impacts on formation of internal environment from the winter and summer period point of view The paper describes methods of optimization (analysis of in-site measurements on reference objects, environmental computer simulation and modeling based on finite methods, thermovision analysis as well as standard calculating methods. On case study it demonstrates possibility of energy effective and optimized envelope construction.
Indoor Environment State of Classrooms Situated in the Loft Spaces of Civil Engineering Faculty TU in Kosice – Dynamic Analysis Using Design Builder
Authors: Kovac Martin , Knizova Katarina
Published: March 2013

A purpose of this submission is a dynamic analysis of indoor environment on the suitably chosen classrooms, which are situated in loft spaces of Civil Engineering Faculty TU of Kosice. The evaluation was doing by using energy simulation tool DesignBuilder. In this submission there are compared different modes of natural ventilation during a day, with or without night ventilation. The next subject of presented analysis is to consider the installation of the exterior shading elements and their influence on a modification of an operative temperature in classrooms. The purpose of the whole submission is to obtain a dynamic view of indoor environment changes that are determined by internal and external factors.
Synthesis of Silicon Thin Film by Electrodeposition from Ionic Liquid
Authors: Park Je Sik , Park Jae Jun , Kwon Kyung Jung , Kim Han Su , Lee Churl Kyoung
Published: March 2013

The synthesis of a silicon thin film by room-temperature electrodeposition was investigated in the ionic liquids 1-ethyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl)imide ([EMIM]Tf2N) and 1-butyl-3-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ([BMPy]Tf2N) with SiCl4. Cyclic voltammetry on a gold working electrode showed the possibility of the electrodeposition of elemental silicon. The reduction current of silicon in [EMIM]Tf2N was higher than in [BMPy]Tf2N. The elemental silicon thin film could be synthesized on the gold electrode under potentiostatic conditions, as confirmed by various analytical techniques including X-ray diffraction, X-ray photoelectron spectroscopy, and scanning electron microscopy with energy-dispersive spectroscopy. In the [EMIM]Tf2N electrolyte with dissolved SiCl4, the electrodeposited Si surface was more uniform than in [BMPy]Tf2N and no impurity was detected except trace oxygen caused by contamination during handling for analysis
Study and Characterization of TiC/Fe Alloys by Gel-Casting
Authors: Lin Tao , Lv Shao Yuan , Li Shi Lei , Shi Yong Liang , Shao Hui Ping
Published: March 2013

The TiC/Fe steel matrix composites were prepared by gelcasting technology of selecting the appropriate gel system and additives, the reasonable technological parameters. The toluene and 2-hydroxyethyl methacrylate (HEMA) were as gel system, oleic acid as dispersant. The rheological property, curing process and performance of the body were analyzed. The results show that the monomer (HEMA) content of 4.6wt% and oleic acid to 2wt% which increased the solid content from 50 to 54vol.%. The relative density of green body is 59.6%, the intensity is 28MPa. After sintering, the complicated shape was prepared.
The Effect of Sn on Microstructure and Mechanical Properties of Mg-Li-Zn-Sn Alloys
Authors: Jin Cheng Ji , Wu Rui Zhi , Zhang Jing Huai , Zhang Mi Lin
Published: March 2013

The microstructure and tensile properties of the as-cast and as-extruded Mg-12Li-1Zn-xSn (x=1, 3, 5, 8, wt.%) alloys were investigated. The alloys are mainly composed of β-Li phase, Mg2Sn phase. With the increase of Sn content, the microstructure of as-cast alloys is refined. After extrusion processing, grain size is obviously refined, and the Mg2Sn phase is broken into tiny particles. The elevated-temperature tensile behavior of the alloy was investigated at 373~523k under the strain rate of 1×10-2~1.7×10-4s-1. The results indicate addition of Sn can improve the strength and plasticity, when the content of Sn is 5.0 wt.%, the as-extruded alloy possesses good superplasticity, which obtains the maximum elongation of 134.4% under a low strain rate of 1.0×10-3s-1at 523K.
Effect of Isothermal Aging 2000 Hours on Intermetallics Formed between Ni-Pd-Au with Sn-4Ag-0.5Cu Solders
Authors: Hanim M.A. Azmah , Ourdjini A. , Aisha I. Siti Rabiatul , Azlina O. Saliza
Published: March 2013

The present study investigated the effect of isothermal aging up to 2000 hours on the intermetallics formed between Sn-4Ag-0.5Cu lead free solder on electroless nickel electroless palladium immersion gold surface finish (Ni-Pd-Au). For all parameters, aging have an effect of changing the intermetallic morphology to coarser and dense structure. The intermetallic compound formed for the interconnection of the lead free solder changes with increased aging time from (Cu,Ni)6Sn5 compound to (Ni,Cu)3Sn4. At the end of the 2000 hours aging time, it changes to Ni3Sn4. This is the effect of Cu element availability during the intermetallics growth process. Starting from as reflow process, (Pd, Ni)Sn4 intermetallics formed near the interface of the solder joint. The formation of the (Pd, Ni)Sn4 intermetallics act like a diffusion barrier to slow down the growth of interface intermetallics. Lastly, Au element was detected in the Pd-Sn based intermetallic after aging more than 1000 hours.
Synthesis, Structural and Photoelectrical Properties of Self-Assembled Gold-Poly(3,4-Ethylenedioxythiophene) Nanowires and Nanocables
Authors: Sun Bin , Long Yun Ze , Li Meng Meng , Hu Xiu Jie , Qi Ying Qun , Zhou Shu Yun , Chen Ping
Published: March 2013

Gold-poly (3,4-ethylenedioxythiophene) (Au-PEDOT) nanowires with Au nanoparticles embedded in the polymer matrix and polyvinylpyrrolidone (PVP) modified Au-PEDOT coaxial nanocables with a core-shell structure have been synthesized by a new and facile self-assembly method. The morphology and structure features of the composites were characterized by transmission electron microscopy, selected-area electron diffraction, and energy-dispersive x-ray spectrometry. The room-temperature electrical conductivity of the casted composite films was about 0.21 S/cm. Photoresponse of the films were also investigated with respect to wide potential applications of the multifunctional composites. Clear photocurrent switching characteristic during switching on/off of a xenon lamp was observed.
Preparation and Characterization Glass Fiber Reinforced BMI/DABA/KH550 Composite
Authors: Ali Nazakat , Wu Yin , Zhang Qiu Yu , Chen Ying
Published: March 2013

BMI composite is important class of material use in aerospace industry. In this paper we have fabricate glass fiber reinforced composite using DABA/BMI/KH550 matrix, And characterize the mechanical and thermal properties accordingly, Mechanical and thermal properties results shows that newly developed composite has better properties than that composite made from DABA/BMI matrix.
Fabrication and Characterization of Ag Nanoparticles Loading pH Sensitive Polymer Composite Microspheres
Authors: Wang Xiu Qing , Liu Xiao Yun , Zha Liu Sheng
Published: March 2013

The silver nanoparticles (Ag NPs) were loaded into pH sensitive polymer microspheres by in-situ reduction method, which are composed of linear poly(acrylic acid) (PAA) and cross-linked poly(N-isopropylacrylamide) (PNIPAM). The morphological structure of the formed composite microspheres and the particle diameter of the embeded Ag NPs were characterized by field emission transmission electron microscopy, their weight content by thermogravimetric analysis, and the pH sensitivity of the microspheres by dynamic light scattering. The absorbance spectra of the composite microspheres dispersed in the aqueous media with different pH values were measured by ultraviolet-visible spectrometry, and the obtained results show that the remarkable dependence relationship exists between the optical property of localized surface plasmon resonance (LSPR) of the loaded Ag NPs and the pH value, indicating that their LSPR property can be tuned by environmental pH value.
Experimental Study on Adsorption Mechanism of U(VI) by Modified CMC
Authors: Zhou Shu Kui , Zeng Guang Ming , Liu Ying Jiu , Jiang Hai Yang
Published: March 2013

The modified carboxymethyl cellulose(CMC) was prepared and explored to adsorb uranium(Ⅵ) ions from aqueous solution in a batch system. The experimental results showed that on the condition of reaction temperature 70~80°C, CMC 30%-35% (w/w), CMC to AA (w/w) of 10:2.5 and reaction time 3.5-4 h, the modification effect was the best. High removal efficient of U(Ⅵ) was obtained 97.1% at temperature of 25°C, pH value of 5.0, dosage of modified CMC 0.1 g/L and contact time of 60 min. It was found that the adsorption process was best described by Freundlich model and pseudo-first-order kinetic model (R2=0.9618), indicating that the adsorption is mainly on the surface of the modified CMC. Thermodynamics parameters of negative value of ΔG0 and positive value of ΔH0 revealed the spontaneity and endothermic nature of the adsorption. The adsorption is primarily due to physical adsorption.
Mo Content on Wood Colored Electro-Less Plating Ni Color Influence
Authors: Pan Yan Fei , Huang Jin Tian
Published: March 2013

In order to change the single color of wood surface after chemical plating, this study conducts the surface chemical plating Ni, then in the containing ammonium molybdate solution for staining. The content of Mo is 4.09% when the wood surface displays purple; the content of Mo is 8.65% when the wood surface displays yellow; the content of Mo is 25.26% when the wood surface shows rainbow; the content of Mo is 40.92% when the wood surface shows pink; the content of Mo is more than Ni when the wood surface displays black; besides, after different time, there are purple, yellow, rainbow, pink, black, which can be seen. Mo, Ni, P form multilayer film thickness, which has an effect on the optical transmittance.
Study of Adaptability of the Compound of Sulfonate Acid Water Reducing Agent with Ceramic Slurry Blank
Authors: Ye Chang , Shi Cheng Xing , Liu Qi Cheng , Xia Qing
Published: March 2013

In this study, we investigate the effect of four types of water reducing agen on fluidity, suspensibility, thixotropy and the particle size of ceramic slurry and analyze the corresponding mechanism. Those water reducing agen include Lignin sulfonate water reducing agent, Sodium metasilicate, naphthalene sulfonate formaldehyde condensate, and the inorganic compound reducing agent. Experiment results shows that the relative molecular mass, the structure of water reducer, the content, and the moisture content of ceramic blank particle can play an important role in the adaptability of both water reducing agen and ceramic slurry. We make a mixed water reducer with lignin sulfonate, sodium metasilicate, and naphthalene sulfonate formaldehyde condensate by the corresponding appropriate mass ratio: 3:2:1. Then we add the mixed water reducing agen by the total dosage of 0.6% into the designed ceramic castable. We find that the performance of the slurry is considerably better improved by the mixed water reducing agen than by either a single one or by the currently commercial inorganic compound reducing agent, such as better improvements in liquidity, the slurry particle size, the mechanical strength of dry body, and the damage strength of porcelain body.
Green’s Function for Piezoelectricity with an Elliptical Inclusion in Multi-Field Circumstance
Authors: Dai Long Chao , Gong Jun Jie
Published: March 2013

The two-dimensional problem of an elliptic inclusion embedded into an anisotropic magneto-electro-elastic solid is studied. Based on the Stroh formalism combined with the technique of conformal mapping and the method of analytical continuation, general solutions for the stress and deformations in the entire domain are obtained when a generalized line force and a generalized line dislocation is located at a point outside, inside, or on the interface of an elliptical inclusion. Comparisons with some related solutions show that the present solutions are valid and general.
Dynamics Analysis and Modeling of a Hexapod Robot with Single Drive
Authors: Xie Hong , Wang Xu Hong , Wang Tao , Zhao Yi Ming , Zhang Ling Bo
Published: March 2013

According to the modular parallel mechanism and characteristics of a hexapod robot with single drive and tripod gait, we set up a dynamics model and study the relationship between the crank shaft angle and drive torque, which is based on the motion theory of modular parallel mechanism, Lagrange theorem, motion equations, etc. After that, a virtual prototyping model of robot is established based on ADAMS simulation software. The rationality of the analytical method is validated, which provides important theory insight for the control system of robot movement.
Influence of Particle Size of TiO2 Powder on the Energy Conversion Efficiency of a Dye-Sensitized Solar Cell
Authors: Bilgin Nursev , Park Jongee , Ozturk Abdullah
Published: March 2013

Dye-sensitized solar cells (DSSCs) have been fabricated using a TiO2 paste composed of mixtures of 25 nm and 250 nm TiO2 particles at various ratios. A maximum energy conversion efficiency of 6.7% has been achieved using the DSSC, based on a TiO2 layer composed of 40 wt% 25 nm and 60 wt% 250 nm TiO2 particles. The short-circuit current density, open-circuit voltage, and filling factor of the cell were 12.95 mA, 0.82 V, and 0.63, respectively. The overall performance of the DSSCs based on TiO2 layers composed using a mixture of two different sized particles is much better than that of either only 25 nm or only 250 nm TiO2 particles. It is recognized that adding the larger particles to the small particles in the TiO2 paste increases the dye absorption and light scattering effects of DSSC, resulting in a higher short-circuit current density and improved energy conversion efficiency.
A Study on Double Plus Chain Mechanism for Li-Ion Power Battery Formation Equipment
Authors: Han Liang , Xiao Feng , Zhou Lu
Published: March 2013

The automation level has a great influence on the consistency of batteries. By now, an improvement of formation process has proposed new requirements for the formation equipment. This paper brings forward the application of double plus chain mechanism to formation equipment. The chain running at a low speed, the batteries on it move quickly and smoothly. The stopper can stop them for some specific operations without blocking other battery packs. PLC cooperating with signal input and receiving units makes it easy to meet the control requirements. If process changes, we only need to adjust the location of detection devices and execution units. Thus, the control system is very flexible and adaptive.
An Autonomous Navigation Algorithm Using Geomagnetic Sensor and Star Sensor
Authors: Chen Cai Min , Li Bao Hua , Wang Chang Hong , Liu Rui
Published: March 2013

Aiming at the limitations of the orbital dynamic equations based star sensor navigation method, a star sensor /geomagnetic information utilized aircraft autonomous navigation method is proposed. Dynamic equations applicable to general aircrafts are established. System observation equations are deduced. The angle between geomagnetic and starlight vector is used as observation in the algorithm. Extended Kalman filter is used to estimate position and velocity of aircraft in the algorithm. Singular value decomposition method is used to analyze observability of the system. Simulation results show that the algorithm has many advantages including high precision, good filtering convergence and stability, and non-accumulated error. The algorithm can be used as aided navigation of inertial navigation or in occasions, which only require a general navigation precision.
The Research of Real-Time Trajectory Interpolation Based on Open Numerical Control System
Authors: Li Juan , Wang Mao Li , Hao Hui Juan
Published: March 2013

This paper researches on Open Numerical Control System based on the PC platform, in which the motion controller works as the control core, can realize the multiaxis motion control in real time and the sequential logic control. This paper sets out from the hardware structure, use the Real-time trajectory interpolation algorithm, and choose the proper motion-control function. it can realize fast, stable and continuous movement with multistage path, and ensure that the system is open, real-time and reconfigurable.
Highway Traffic Incident Detection and Optimal Sensor Placement Layout
Authors: Bai Lan , Wu Qi Sheng , Yang Mei , Wei Lan Xin , Li Bo , Gao Rong
Published: March 2013

Traffic incident detection is critical to the core of the traffic incident management process. In order to study the highway traffic incident detection algorithm and the layout spacing of the fixed detector, under the assumptions of the linear traffic flow, to detect traffic incidents as the goal, using TransModeler traffic simulation software to simulate the highway traffic conditions from Xian to Hanzhong, getting the changes in the macroscopic traffic parameters before and after the traffic incident, and analysis of the data, finally puts forward the optimal layout of spacing of basic road traffic incident detection.
A Hybrid Authentication Protocol with ID-Based Signcryption for Vehicular Ad Hoc Networks
Authors: Zhang Jian
Published: March 2013

In order to resolve the message safety problem in vehicular ad hoc networks (VANET) and improve traffic efficiency, a privacy-preserving and scalable scheme was proposed for VANET messages authentication, in which identity (ID)-based signcryption was used to help vehicles to secretly receive a secret member key from an RSU, and then the vehicles can anonymously send messages on behalf of the group. The efficiency of the proposal is at least 33% higher better than other existed scheme.
Composite Grinding Machine Asynchronous Electric Spindle Direct Torque Closed-Loop Servo Control Research
Authors: Lan Tian , Han Qiu Shi , Peng Bao Ying , Hu Shi Wei
Published: March 2013

Composite grinding machine for non-circular shaft parts, on the workpiece servo spindle high requirements.In order to overcome the vector control coordinate calculation of complex, slow response speed and other defects, this paper adopts the direct torque control scheme of asynchronous motor spindle servo control research.Using the Matlab/Simulink module library provides the basic module, built asynchronous electric spindle direct torque control system model.Coordinate transformation process were established, flux adjust step, flux observation, link and loop PID position control module, and the use of subsystem package technology package.The current loop, speed loop, ring in position and torque simulation test, the results show that, the method of direct torque control of asynchronous motor spindle control drive control system can obtain good static and dynamic response characteristics and the closed-loop response performance.
VME Bus-Based Multiprocessor Parallel Data Acquisition System
Authors: Zhou Rou Gang , Zhou Yun Fei , Chen Xing
Published: March 2013

Synchronization data acquistition system with multiple processors is the trend of the modern manufacturing equipment development. Complex high-precision equipment even has hundreds of sensors and they are acquiring data at the same time, the sensors are distributed in dozens of data acquisition cards. The key technology is the acquisition system enable to synchro-gather data from data acquisition cards which base on data bus between them and then sent the gather data to arithmetic system. In order to synchronic data integration, it is required a high-speed and low-latency data channels and a suitable data protocol between data acquisition cards and main control card. This paper introduce a new type of synchronous data acquisition system, through the self-defined data bus and a specific memory allocation mechanism, the data acquisition system can sent the integrate data to arithmetic system through main control card after it get the data from acquisition cards, the transfer delay of data exchange is nanoseconds.
Gaze Recognition and Application
Authors: Yu Fang Ming , Li Tsai Cheng
Published: March 2013

This paper asserts a method of controlling the cursor based on the Fisher linear discriminant (FLD) analysis to recognize six classifications of human face movements, which are face movements upwards, downwards, leftwards, rightwards, blinking of the right eye and blinking of the left eye. These classifications represent cursor movements upward, downwards, leftwards, rightwards, and the right or left button on the mouse respectively. This method can be separated into two areas: face detection and gaze recognition. Face detection is to convert the RGB color space into YCbCr in order to segment skin tone areas, where the human face area is located by using the connect component labeling method. Gaze recognition is accomplished by building a gaze recognition training model parameter through FLD algorithm. Then, by using the Euclidean distance as the rule of decision, match the detected facial image to the parameters of this model to find the shortest Euclidean distance and its corresponding classification to control cursor movements.
Remote Control System Design for Domestic Wall-Mounted Gas Boiler Based on GSM Modem
Authors: Xu Jun Peng , Ma Xiao Qin , Shen Hong
Published: March 2013

In allusion to the traditional temperature control method for domestic wall-mounted gas boiler, this paper designed a temperature control system with a wireless temperature sensing circuit to transmit the real-time indoor temperature to the controller, effectively solved the problem that the detection temperature is always lower than the indoor temperature, and guaranteed the temperature control effect of the wall-mounted gas boiler. Furthermore this temperature control system can set the temperature at home, while users can remotely start and stop the heating of the gas boiler by mobile phone.
NDE Inspections and Simulation of Defects in Composite-Sintered Bushes
Authors: Im Kwang Hee , Kim Ki Youl , Shin Ki Taek , Lee Han Hee , Kang To , Cho Hyun Joon , Jung Jong An
Published: March 2013

Bush is one of machine and automobile parts like brake used in drums and hubs in particular. Such bush parts are used for bearings of heavy-duty, large cars requiring wear resistance and high load carrying capacity. High temperature diffusion bonding has been applied for holding the both materials of the bushing together, which are outer steel materials and inner composite-sintered bushings. Therefore, it is very important evaluate the bonding integrity in manufacturing process. A simulation has been performed in order to evaluate the maximum defect sizes. Also, ultrasonic C-scan tests were performed for finding the defect in the composite-sintered bushings with the size of inherent flaws.
The Experimental Investigation of WEDM for Surface Roughness of Hardened Tool Steel: SKD 61
Authors: Kosit Khanchai , Jirapattarasilp Komson
Published: March 2013

SKD 61 is tool steel that recommended using for hot working as mold and die. . In order to making mold and die, Wire Electrode Discharged Machining (WEDM) has been most operation. The objective of this research was to study factors, which were affected on surface roughness and optimal parameters in WEDM of hardened tool steel. Material used in the experiment was tool steel JIS SKD 61 that was hardening by heat treatment process. Taguchi’s experimental design was conducted on 5 factors and 3 levels that L27 of Taguchi standard orthogonal array was chosen for the design of experiments. Power setting, off time off, wire feeding, wire tension and wire offset were chosen as factor for evaluation surface roughness. The importance level of the machining parameters was determined by analysis of variance (ANOVA). The optimum factors combination was obtained by using the analysis of signal- to-noise (S/N) ratios. Finally, experimentation was carried out an optimal solution of machining parameters for quality of surface roughness in WEDM process.
The Focus of Beam Using Optical Transformation
Authors: Yu G.X. , Yu Xin Ye , Xia L.J.
Published: March 2013

A novel scheme is proposed to achieve beam focus by applying the method of embedded coordinate transformation[1] in this paper. The focus degree of electromagnetic waves is determined by the structure parameters in the transformation region. Theoretical analysis and simulating results are given to demonstrate that our design is feasible and practical, and might have some potential applications in solar cell plate. Moreover, full-wave numerical simulations do further work to confirm the theoretical analysis.
Differents Methods to Estimate the Mean Radiant Temperature in an Urban Canyon
Authors: de Lieto Vollaro R. , Vallati A. , Bottillo S.
Published: March 2013

The mean radiant temperature is one of the meteorological key parameters governing human energy balance and the thermal comfort of human body. This variable can be considered as the sum of all direct and reflected radiation fluxes to which the human body is exposed. After the basics of the Tmrt calculation a comparison between two methods suitable for obtaining Tmrt in a street canyon will be presented. One of the discussed methods of obtaining Tmrt is based on the utilization of a globe thermometer. The other method is the radiation environment simulation through three PC software (RayMan, ENVI-met and SOLWEIG).
Quality Evaluation of Jajrood River (IRAN) by Quality Indices Methods
Authors: Mirzaei Mohammad , Hasanian Hamed
Published: March 2013

This Regular evaluation and analysis of river quality helps accurate management to reach acceptable quality. In this study, water quality indices (WQI) method applied to evaluate quality of Jajrood River which is one of the main sources of Tehran drinking water. It helps to subsidize management actions in Jajrood watershed. Sampling carried out for 9 years during 2001-2010 in 10 stations along the river in wet and dry stations to identify water quality and the main source of pollution. Results show water quality in all stations classifies as medium according to National Sanitation Foundation (NSF) and water quality index in wet season is better than the corresponding value in dry seasons. Entrance of pollution during the upstream of Latian Dam (especially in populated centers) has negative effect on the water quality, however river has a good natural attenuation capacity, therefore quality index of river in the main inlet of Latian dam (Lashkarak Bridge) classifies as medium. Collecting wastewater at the populated centers and developing soil conservation and controlling erosion at the upstream of watershed can effectively improve the water quality of river.