bluuebunny/crossref_metadata_2025 huggingface dataset:
The Development of Embedded Electronic Jacquard Machine Controller Based on ARM7
Authors: Fang Yu , Wang Dong Yun , Hu Yan Na , Zhan Xiao Juan , Chen Wen Ya , Ma Huan Peng
Published: January 2014

Recently, the tufted carpet pattern are getting more and more complex. However jacquard machine equipment is relatively backward and it has low degree of automation, which has caused a lot of labor and low efficiency. To solve these problems, the pattern forming principle of the tufting jacquard machine was studied and the design of automatic control system was put forward. So an embedded electronic jacquard machine controller based on ARM7 was developed.
The Design and Implementation of MSINS/GPS Navigation Computer
Authors: Gao Yan Bin , Liu Hui Yu , Zhang Xing Zhi , Han Ji Tao
Published: January 2014

In order to meet the miniaturization, low power, low cost and increasingly high precision requires of Strapdown navigation system, the Strapdown Navigation Computer based on DSP and FPGA is researched in this paper. DSP is used to process the data. The FPGA has functions of data collected and I/O controlled etc, the dual-port RAM interface complete the data communication between DSP and FPGA. Two CPU give full play to their respective characteristics, the coordinated work, can complete the function of the navigation computer well.
Radiation Disturbance from AC Motors in Underground Coal Mines
Authors: Sun Ji Ping , Chen Hui , Tian Zi Jian
Published: January 2014

The radiated electromagnetic disturbances produced by operating electromotor equipments in coal mines have some effects on the electromagnetic environment in coal mines. Based on the analysis of the Chinese national EMC standard on rotating electrical machines and the operation characteristics of the electromotor equipments in coal mines, it can be concluded that frequency spectrum of the radiated disturbances resulting from AC motors ranges from 9kHz to 1GHz. The radiated electromagnetic disturbances in the pumping house underground mines have been measured. The results show that the radiated emissions above 30MHz produced by the normal running electromotor system are quite low, which are comparable to the radiated emission limits set in the Chinese national standard GB 755-2008;the maximum radiated field strength reaches about 0.56V/m under 30MHz. However, when motors start or stop, the radiated field strength can reach about 1.26V/m or higher. Therefore, some shielding measures for monitoring and communication equipments should be taken to reduce the radiation interference from AC motors.
Research the Stealth Technology of Ship Electric Field by Applying Magnetic Eliminate Strategy
Authors: Zhang Hai Peng , Chen Xin Gang , Ao Chen Yang
Published: January 2014

In order to enhancement the stealth capability of ship electric fields, the similar characters of ship electric and magnetic fields produce mechanism were studied. The similar effect characters to battle effectiveness of ship electric and magnetic fields were analyzed. The communicate theory of ship electric and magnetic fields were researched. The similar characters of analytical methods and stealth technology strategy of ship electric and magnetic fields were discussed. It is shown that the stealth technology between ship electric and magnetic fields is similar and the research can be developed by the same methods and the same experimentation.
Design of Ultracapacitor-Battery Composite Power System for Coal Mine Trackless Rubber Tyre Electric Vehicle
Authors: Zhang Chuan Wei , Wang Ming Yu , Wan Ying Ying
Published: January 2014

This paper introduces the characteristics of ultracapacitor, designs the ultracapacitor-battery composite power system of coal mine trackless rubber tyre electric vehicle. Then the composite power system’s structure and working principle are discussed. Moreover, the driving range of coal mine trackless rubber tyre electric vehicle is improved, and this provides the scientific basis and technical basis for coal mine trackless rubber tyre electric vehicle’s application has a certain value.
Parametric Identification for a Free-Floating Base Space Manipulator
Authors: Pereira William Takeshi , Pazelli Tatiana F.P.A.T.
Published: January 2014

In this paper parametric identification algorithms are applied to estimate dynamic parameters of a space manipulator, whose model is described through the Dynamically Equivalent Manipulator approach. Gradient and least-square methods are applied in order to evaluate capability of the schemes. A sufficiently rich input signal is applied as reference trajectory for joints position, while a simple model-based PID computed torque control scheme is responsible for keeping the trajectory tracking. Simulation results for a two degree-of-freedom space manipulator have shown the effectiveness of the proposal.
Mobile Robot Obstacle Avoidance Based on Multi-Sensor Information Fusion Technology
Authors: Cheng Yuan Hang , Zhang Chun Lan
Published: January 2014

It is important to research and develop the mobile robot control system for the mobile robot navigation in unknown environment control theory and method of study; and there are rich environment perception ability, independent dynamic decision-making and planning, behavior control and execution and other functions in one mobile robot. In order to achieve good results, the choice of methods for obstacle avoidance is vital for obstacle avoidance problem which is an important branch of robot technology. This paper base on visual sensor that has the characteristics of high sensitivity, wide dynamic range and infrared distance detection with high efficiency, accurate, and other advantages , and propose introduction two kinds of obstacle avoidance strategy of sensor fusion technology, And take the behavior control method to be added, on the basis of the robot's obstacle avoidance for the further research.
Room Temperature Atomic Layer Deposition of SiO2 on Flexible Plastic Materials
Authors: Hirose Fumihiko , Kanomata Kensaku , Kubota Shigeru , Ahmmad Bashir , Hirahara Kazuhiro
Published: January 2014

Room-temperature SiO2 atomic layer deposition (ALD) on soft, flexible materials of acrylic resin and polystyrene is developed using tris (dimethylamino) silane and plasma-excited water vapor. The growth rate is measured to be 0.13 nm/cycle at room temperature on the acrylic resin surface. The SiO2 coating on the soft materials was examined by X-ray photoelectron spectroscopy and an organic solvent resistant test. This process is applicable as a surface treatment for improving chemical resistivity of the soft materials.
A Comparison of Sandbox Technologies Used in Online Judge Systems
Authors: Yi Chao , Feng Su , Gong Zhi
Published: January 2014

In this paper, the security issues in online judge systems (OJ) will be discussed. The pros and cons in different sandbox approaches in open source OJs will be analyzed. After that, well explore other possibilities to build a more suitable sandbox for online judge purpose.
A LabVIEW Design for Frontal and Non-Frontal Human Face Detection System in Complex Background
Authors: Mariappan Muralindran , Nadarajan Manimehala , Porle Rosalyn R. , Ramu Vigneswaran , Thiam Brendan Khoo Teng
Published: January 2014

Biometric identification has advanced vastly since many decades ago. It became a blooming area for research as biometric technology has been used extensively in areas like robotics, surveillance, security and others. Face technology is more preferable due to its reliability and accuracy. By and large, face detection is the first processing stage that is performed before extending to face identification or tracking. The main challenge in face detection is the sensitiveness of the detection to pose, illumination, background and orientation. Thus, it is crucial to design a face detection system that can accommodate those problems. In this paper, a face detection algorithm is developed and designed in LabVIEW that is flexible to adapt changes in background and different face angle. Skin color detection method blending with edge and circle detection is used to improve the accuracy of face detected. The overall system designed in LabVIEW was tested in real time and it achieves accuracy about 97%.
Processing Top-N Queries Based on p-Norm Distances
Authors: Zhu Liang , Liu Fei Fei , Chen Wu , Ma Qing
Published: January 2014

Top-Nqueries are employed in a wide range of applications to obtain a ranked list of data objects that have the highest aggregate scores over certain attributes. The threshold algorithm (TA) is an important method in many scenarios. However, TA is effective only when the ranking function is monotone and the query point is fixed. In the paper, we propose an approach that alleviates the limitations of TA-like methods for processing top-Nqueries. Based onp-norm distances as ranking functions, our methods utilize the fundamental principle of Functional Analysis so that the candidate tuples of top-Nquery with ap-norm distance can be obtained by the Maximum distance. We conduct extensive experiments to prove the effectiveness and efficiency of our method for both low-dimensional (2, 3 and 4) and high-dimensional (25,50 and 104) data.
Research and Improvement on HMM-Based Face Recognition
Authors: Cheng Yan Fen , Tang Hao , Chen Xian Qiao
Published: January 2014

This paper is concerned with face recognition using the hidden Markov model with 2D-discrete cosine transformation observations. The first part of the paper mainly discusses the influence of sampling parameter selection on model training and recognition efficiency and proposes method to increases the model efficiency through selecting optimal combinations of input parameters. In the second part of the paper, we choose the optimal parameters as input data standard for image matching and extend Viterbi algorithm by setting thresholds, the recognition time is reduced by 12.4% on average.
P300 Feature Extraction of Visual and Auditory Evoked EEG Signal
Authors: Qiao Xiao Yan , Peng Jia Hui
Published: January 2014

It is a significant issue to accurately and quickly extract brain evoked potentials under strong noise in the research of brain-computer interface technology. Considering the non-stationary and nonlinearity of the electroencephalogram (EEG) signal, the method of wavelet transform is adopted to extract P300 feature from visual, auditory and visual-auditory evoked EEG signal. Firstly, the imperative pretreatment to EEG acquisition signals was performed. Secondly, respectivly obtained approximate and detail coefficients of each layer, by decomposing the pretreated signals for five layers using wavelet transform. Finally, the approximate coefficients of the fifth layer were reconstructed to extract P300 feature. The results have shown that the method can effectively extract the P300 feature under the different visual-auditory stimulation modes and lay a foundation for processing visual-auditory evoked EEG signals under the different mental tasks.
An Online Evaluation Method for Ride Comfort Based on Multivariate Physiological Indicators
Authors: Jia Dong Yao , Hu Po
Published: January 2014

Demand for objectivity, accuracy and online learning is becoming increasingly important to current evaluations for ride comfort. A data-based appraisal model of riding environmental comfort is proposed in this paper. Physiological indicators data is introduced into the improved supportvector regression(SVR), then, physiological indicators are used to learn online by correcting the parameters of the model. Excellent evaluation capacity is demonstrated through numerical examples, and rating accuracy is 95.6%.
The Research on the Ultrasonic Focusing and TR Thickness Test Technology
Authors: Yin Liang , Li Zhe , Chen Juan , Qi Xin
Published: January 2014

A TR and ultrasonic focusing wheel probe is designed for some special engineering testing item. Ultrasonic TR thickness testing and focusing detection can be carried out without coupling medium. With the testing system and the probe set on a control machine car, aligned and marginal testing for steel plates quality and the thickness testing of corroded pipe wall can be accomplished by dry couple method. The processing method of detection signal and the design of peripheral circuit are also introduced in this paper.
Beam Forming of Lamb Waves for Nondestructive Testing of Plates
Authors: Ma Qing Zeng , Jiao Jing Pin , Hu Ping , Yang Jing
Published: January 2014

For wide range defect detection in plate, acoustic beam optimization technique was investigated. The synthesis wave field obtained from the basic phased-addition is prone to be influenced by the noise and the resolution is low. To improve the performance of beam forming of array, the synthesis acoustic field is processed with amplitude weighting. The experimental data have been processed with phase shift and amplitude weighted optimization. It is shown that the proposed beam forming technique with transducer array can recognize the features in plate.
A Performance Testing Tool for Source Code
Authors: Luo Jun , Yang Wei
Published: January 2014

With the rapid development of the information age, computer software develops toward systematization and complication. In application areas such as commerce, finance and medical treatment,the performance of software is attracting more and more attention which even becomes one of the important factors to determine whether users are willing to use a piece of software. Currently, static checking tools are mostly designed to check the code errors but pay little attention to the performance problems. In order to detect the defects in source code that may cause performance problems, this paper designs and achieves a performance testing tool based on static analysis method. The experiments of detecting several open source projects using our testing tool demonstrate that it can quickly find the defects in source code with high accuracy rate. The result of defection removing shows that it can significantly reduce the memory consumption of software, and it can effectively improve software performance.
Study on Beneficiation of a Fe-Mn in Sinkiang
Authors: Zhang Zhi Guo , Liu Quan Jun , Ran Jin Cheng
Published: January 2014

In allusion to study of complex iron, manganese polymetallic ore,Fe has a grade of 14.28% while Mn 18.72% in the raw ore.According to process mineral research,condition tests research were carried on ,which got the the best grinding fineness of 85.7% -200mesh.The intensity of the weak magnetic field is 0.08T,while the strong is 0.6T.Based on the results of condition tests research and open line test,the flow sheet of low intensity magnetic separation-high intensity magnetic separation is recommended.We get the finally index through tests:the Fe grade of iron concentrate is 62.52% ,which has a recovery of 53.69%;the Mn grade of manganse concentrate is 32.25%,which has a recovery of 68.55%.
Synthesis and Properties of Barakol Tailored for Fluorescent Biodiesel Marker
Authors: Chimsook Thitiphan
Published: January 2014

This work reports the synthesis and evaluation of barakol tailored to become biodiesel fluorescent markers. Fluorescent markers for biodiesel fuels were synthesized from the reaction between barakol, which was obtained from the leaves and flowers ofCassia siameLamk., with acid chloride in the presence of triethylamine. These synthetic fluorescent markers were 7-lauroyloxy-5-acetonyl-2-methylchromone, 7-butyryloxy-5-acetonyl-2-methylchromone and 7-(2-ethyl)-hexanoyloxy-5-acetonyl-2-methylchromone. These synthetic fluorescent markers were invisible color in biodiesel fuels when they were added into biodiesel and quantitative measurement was carried out using spectrofluorometer. All compounds gave fluorescence at 612 nm when they were excited at 464 nm. The testing results of fuel properties using the ASTM test methods revealed that the physical properties of the marked biodiesel fuels were similar to those of the unmarked biodiesel fuels. Moreover, those synthetic fluorescent markers were found to be stable in diesel fuels for at least three months at a concentration of 4 ppm.
Translate the Stateflow Models into Alloy for Safety Analysis
Authors: Cui Chang Chang , Li Guo Qi
Published: January 2014

Safety analysis is widely appreciated for critical systems. Model-based safety analysis is emerged under the background of mode-based development. For automated model-based safety analysis, extended models should be translated into script of input of formal analyzer. Consequently, many translation systems are constructed. In this paper, we explore the translating method between Stateflow models and Alloy, which is a declarative specification language for expressing complex structural constraints and behavior in a software system. Concrete translation systems could be built based on the method.
Oil Supply Characteristic Test and Application of Fuel Injection Pump for Diesel Engine
Authors: Huang Jian
Published: January 2014

In the fuel injection pump on crude oil engine, the precise couple attrition will cause loss of oil supply pressure, oil consumption increase, under-power, emission pollution increase and other problems after the long-term usage. The traditional filed-strip is complicated and time-consuming. Through the summary of engine trouble regulation, we can find out fault diagnosis without disassemble has guiding significance for the modern vehicle maintenance and repair. This article realizes the test and application of fault diagnosis for diesel oil supply characteristic through testing oil supply pressure and oil supply diesel engine.
Microstructure and Mechanical Properties of Al/AlN Surface Composite Fabricated via Multi-Pass Friction Stir Processing
Authors: Yang Min , Song Chao Qun , Liu Xiu Zhong , Cai Cang Long
Published: January 2014

The AlN particles reinforced composite was fabricated on the surface of aluminum 6061-T6 alloy rolled plate by five passes friction stir processing (FSP). Microstructure of FSPed sample was characterized by optical microscope and scanning electron microscope. AlN particles in composite were verified by EDS and XRD. Microhardness and resistance to wear were also investigated. Results show that grains in composite were refined by dynamic recrystallization and uniformly dispersed AlN particles. Composite region bonded with the Al substrate well. No reaction occurred at the interface between AlN and Al matrix. By comparison with base metal, the FSP-produced composite exhibited improved microhardness and substantial wear weight loss reduction.
Development of Surface Roughness Prediction by Utilizing Dynamic Cutting Force Ratio
Authors: Tangjitsitcharoen Somkiat , Samanmit Kanyakarn , Ratanakuakangwan Suthas
Published: January 2014

This paper presents the development of the in-process surface roughness prediction in the CNC turning process of the plain carbon steel with the coated carbide tool by utilizing the dynamic cutting force ratio. The dynamic cutting forces are measured to analyze the relation between the surface roughness and the cutting conditions. The proposed surface roughness model is developed based on the experimentally obtained results by employing the exponential function with six factors of the cutting speed, the feed rate, the tool nose radius, the depth of cut, the rake angle, and the dynamic cutting force ratio. The dynamic cutting force ratio can be calculated and obtained by taking the ratio of the corresponding time records of the area of the dynamic feed force to that of the dynamic main force. The relation between the dynamic cutting force ratio and the surface roughness can be proved by the obtained frequency of them in frequency domain which are the same frequency. The proposed model has been proved by the new cutting tests with the high accuracy of 91.04% by utilizing the dynamic cutting force ratio.
Investigation on Properties of Modified Asphalt Containing Antiaging Agent
Authors: Wang Xiao , Xie Sai Sai , Wu Qing Lin
Published: January 2014

The purpose of this work is to investigate the thermal aging and ultraviolet (UV) radiations aging of SBSMA. Antioxidants and UV absorbers were employed to improve the antiaging resistance of SBSMA in this study. The results indicated that the SBSMA with antioxidants has good heat aging resistance, and SBSMA with UV absorbers blends have good photostability. The compound antiaging agents containing antioxidants and UV absorbers are a best choice to prepare SBSMA with better physical and antiaging resistance. The experimental results also indicated that the effects of antiaging agents on the physical properties of SBSMA are little at low contents. Especially conventional physical properties of SBSMA with 1 wt% of ZDDP and 0.5 wt% of UV531 are close to that of SBSMA.
Dynamic Analysis on the Principle and General Research Situation of Band Conveyor
Authors: Wang Mei
Published: January 2014

The process of large belt conveyor operation must be more accurate by using dynamic analysis. Dynamic analysis and complex, not easy to grasp, needanalysis software -- conveyor dynamic analysis. Based on the status analysis of the domestic belt conveyor dynamic, about software overview of belt conveyor dynamic analysis, the design principle and the belt conveyor dynamic, analysis and applicationof dynamic analysis software.
Dynamic Modeling and Control of Flexible Hexapod Platform for Micro-Vibration Isolation and Precision Tracking
Authors: Wang Ping Ping , Liu Lei , Qian Qiu Ru
Published: January 2014

Micro vibrations, produced by reaction flywheels, coolers, driving motors and other moving parts in spacecrafts, will result in jitters and performance degradation of sensitive optical payloads, such as laser communication platforms, space telescopes and staring cameras. In this paper, one hexapod platform with flexible ball joints is employed to suppress vibrations and steer the payload in 6-degree-of-freedom (DOF). At first, dynamic modeling of the flexible hexapod platform with two-stage hybrid isolation struts is derived. Then, a composite control strategy is proposed for vibration isolation and precision tracking. Finally, the simulation study is presented to validate the proposed control strategy.
The Effect of VC on the Sintering Ability and Microstructure of WC-Al2O3 Composites
Authors: Dong Wei Wei , Zhu Shi Gen , Ouyang Chen Xin
Published: January 2014

The effects of doping with VC (grain growth inhibitors) on the microstructural characteristics and mechanical properties of WC-Al2O3 compacts prepared by hot-pressing sintering were investigated. VC suppressed the rate of densification during isothermal sintering, but eventually increased the sintered density with extended holding time. Microstructure observation results revealed that the grain growth of WC was significantly retarded with the addition of VC. Meanwhile, the activation energy for grain growth during isothermal sintering increased from 380.75 to 446.68 kJ/mol, which is consistent with the inhibition mechanism of VC.
Numerical Simulation for Residual Stress and Deformation of Surface Welding on Membrane Water-Wall
Authors: Meng Fan Ling , Liu Ai Guo
Published: January 2014

Automatic MIG was adopted to weld Inconel 625 alloy on 20 G Membrane Waterwall, which can improve the capacities of high temperature corrosion resistance and wear resistance. To study the influence of Membrane Waterwall surface welding sequences on residual stress and residual deformation, this paper utilized finite element software ABAQUS and segmented moving heat source model to simulate the sequence welding, balanced welding from the middle to sides, balanced welding from sides to the middle, balanced skip welding from middle to sides and balanced skip welding from sides to the middle and studied their residual stresses and deformations. The simulation results indicated that there was a great influence of welding sequences on the residual stress and deformation. The optimal welding sequence was balanced skip welding from middle to sides and balanced skip welding from sides to the middle, which could change the stress distribution, decrease the welding residual stress by 17%, realize the even deformation of the whole welding section and decrease the bending deformation by 50%.
An Optimal Consensus Control for Multiple Agents System with Time-Delay and Disturbances
Authors: Wang Dong Hao , Yuan Jian , Xu Juan , Zhou Zhong Hai
Published: January 2014

The optimal disturbance rejection control problem is considered for a kind of consensus with control time-delay affected by external persistent disturbances and noise. An transformation method is used to convert the consensus with control time-delay to the consensus system without time-delay. The optimal estimated values of the converted consensus system states are obtained by recursive filtering with Kalman filter. Then the feedforward-feedback optimal control law is deduced by solving the Riccati equations and matrix equations. Lastly, simulations show the result is effectiveness to the consensus system with time-delay with respect to external persistent disturbances and noise.
Study on Electronic Controlled Diesel Engine Calibration System Based on CAN-Bus
Authors: Li Jie Hui , Zhang Lu Yun , Huang Tie Nan , Yu Qing
Published: January 2014

To meet the requirement of electric control diesel engine operation optimization, an online calibration system of diesel engine is designed based on the principle and the way to communicate of CAN-Bus. This Calibration system found communication accurate and quick, which researching of software is based on Windows platform, VC++6.0 software and modularization designed [1]. At last electronic control system simulation platform experiments demonstrate that data transfer function is reliable and steady and bench tests testify that the calibration system can calibrate diesel engine practical.
Research on the Heat Transfer of High-Speed Railway Pantographs
Authors: Ruan Jie , Liu Zhi En , Yan Fu Wu , Li Hong Mei
Published: January 2014

In the pantograph-catenary system of electric railroads, there is friction heat between high-speed moving pantograph sliders and the contact wires, leading to a temperature increase on the contact surface. On the contact surface under the current collecting conditions, there are also contact resistance heat and arc heat produced by the current effect, leading to further temperature increase of the pantograph sliders. This paper applies finite element method to analyze the steady heat transfer and transient heat transfer of the pantograph sliders of high-speed train and studies the transient heat transfer of sliders and contact wires in actual movement. The computing results determined the temperature fluctuation range and temperature distribution when sliders and contact wires are in normal working condition.
Dynamic Mission Control Method for Multi-UAV System
Authors: Zhao Yan , Long Guo Qing , Dong Shi You
Published: January 2014

On the problem of mission control of the multi-UAV system in a dynamic environment, the method of Dynamic Task Allocation and Coordination (DTAC), based on the combination of market mechanism and alliance recruitment, is proposed. On the basis of the DTAC model of multi-UAV system, constructed with the application of market negotiation, the physical object of the market negotiation mechanism is substituted by that of alliance recruitment. Furthermore, the recruiter is empowered to coordinate within the alliance, which reduces the auction times and increases the efficiency of DTAC. The result of simulation shows that the method can effectively solve the problem of dynamic mission control of the Multi-UAV system.
Experimental Investigation of Performance and Emission Parameters Changes on Diesel Engines Using Anisole Additive
Authors: Baltacioğlu Mustafa Kaan , Aydin Kadi̇r , Yaşar Ergül , Arat Hüseyi̇n Turan , Conker Çağlar , Burgaç Alper
Published: January 2014

In this study, effect of anisole additive into the diesel fuel on performance and emission parameters of diesel engines was investigated. Instead of structural changes which are more difficult and expensive, development of fuel technologies is preferred to provide reduction on exhaust gas emissions which are harmful to environment and human health. Therefore, in this experimental study, anisole was used as additive into diesel fuel with the volumetric ratio of 1,5%, 3% and 5%. The performance characteristics and exhaust emissions of a four cylinder, four stroke, naturally aspirated, water cooled, direct injection compression ignition engine fueled with modified fuels were analyzed. Engine was subjected constant speed, full load conditions during tests. Engine power, torque, specific fuel consumption, carbon monoxide, nitrogen oxide and carbon dioxide emissions were measured and results were evaluated. Changes in performance parameters were negligible for all ratios of modified fuels except specific fuel consumption. Finally, while carbon monoxide gas emissions were increased with anisole additive, carbon dioxide and nitrogen oxide gas emissions were decreased.
3-D Framework {[Cu(L)nX][X] (H2O)2} L= bipy,n=2 Constructed through C-H….Cl Hydrogen Bondings and π-π Interactions
Authors: Li Yu Feng
Published: January 2014

The reaction of copper 2,2-dichloroacetic acid, heterocyclic diimine (bipy) ligands under mildconditions affords one novel supramolecular complexes, [Cu (bipy)2[[H22 (bipy=2,2-bipyridine X=dichloroacetic acid). The compounds were constituted through hydrogen bonding and ππ interactions between the heterocyclic rings.
The Impact on the Polypropylene Matrix Composites by the Cutting Size of the Automotive Interior Decoration Scrap
Authors: Jin Huan Lin , Yu Jin Ping , Cao Zhen Dong , Tong Wei , Yan Chang Hao , Zhang Ming
Published: January 2014

in this paper, the automotive interior decoration scrap (FRTPP) have been successfully cut in to certain size tiny lumps via self-designed fully enclosed mechanical shred device. Then this lumps were filled in to the PP with additives by the double screw extrusion. The influences of the lumps sizes on the micro-structures , thermal stability,processing fluidity and mechanical properties of the as-fabricated composites have been systematically investigated. Otherwise the morphology changes of polyester fabric attached to the surface of leftover materials have been investigated at different temperature. The results shows that: the different size lumps were homogenously dispersed in the polymer; The thermal stability and fluidity of composite made by 10mm×10mm lumps is the best. The tensile strength of the product by 15mm×15mm increased by 10% while notched impact strength increased by 22%; The polyester fabric remains fiber structure at the processing temperature (190°C-210°C) and can be used as reinforcements for pp.
Microstructure and Hardness Distribution of Ductile Iron by PTA Cr-Ni-Mo-Cu Alloying
Authors: Cao Hua Tang , Dong Xuan Pu , Huang Qi Wen , Pan Zhang , Li Jian Jun , Fan Zi Tian
Published: January 2014

The mixture powder of Cr, Ni, Mo and Cu were deposited evenly on a ductile iron with ferrite matrix and treated by plasma transferred arc (PTA). The microstructure and hardness distribution of the PTA-alloyed layers were investigated by using scanning electron microscope (SEM) equipped with energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and microhardness tester, respectively. Results show that the cross-section consists of four regions: alloyed zone, melted zone, heat affected zone and unaffected substrate. The maximum microhardness of PTA-alloyed sample is measured to be as high as 1077 HV0.2, which is approximately 4.4 times higher than that of substrate. The improvement is attributed to the formation of mixed hard-phases such as Cr7C3, C23C6, martensite, cementite under nonequilibrium solidification, and the solution strengthening by the alloying elements as well as grain refining via the rapid cooling.
Effect of Wall Thickness of the Billet on 1Cr18Ni9 Stainless Steel Tube Stagger Spinning Process
Authors: Yang Shu Heng , Wang Xue Li
Published: January 2014

The stagger spinning process of 1Cr18Ni9 tube was investigated by using finite element method. The metal flow rule around the roller during the tube stagger spinning was analyzed. The influences of wall thickness of the billet on effective stress and spinning force were studied using software Deform. The simulated results indicate that the proper wall thickness of the billet should be 8~15 mm, for the billet with length of 100mm and inner diameter of 200mm.
Flavonoids and Cytotoxic Activity of Gentiana algida Pall
Authors: Yang Ai Mei , Shi Xiao Long , Han Han , Men Yun , Wu Rui
Published: January 2014

Four flavonoids were isolated from the EtOAc extract ofGentiana algidaPall. The structures of these compounds were elucidated as: patulitrin (1), Isoscoparin (2), swertisin (3), swertiajaponin (4). These compounds were identified on the basis of comparing their NMR datas with those of corresponding compounds in the literature. The cytotoxic activity of all these compounds were investigated on the growth of HepG-2 cells, the result showed that compound 2 have high cytotoxic activity, the IC50value is 47.25g/ml.
The Design of Speed Acquisition and Prompt System Based on STC89C52
Authors: Guo Ke You , Chen Xue Ji , Ji Bin
Published: January 2014

It mainly introduces a speed acquisition and prompt system based on STC89C52 in this paper.In the system,STC89C52 is used as the master chip to control the system and the speed is collected by the Hall sensor.The prompt system mainly consists of two parts:the display and broadcast modules.The collected speed is displayed on the LCD and the function of broadcasting is achieved by adopting SYN6288 Chinese speech synthesis chip.The chip will synthesize the speed into speech.Meanwhile,the use of the power amplifier circuit can amplify the speech,and then the speaker output the speech.The system is used on the laboratory’s testing vehicles and can achieve the capability of real-time broadcasting the speed.
Study on Micro-Deformation Monitoring Technology of Contacts for Electric Connectors
Authors: Luo Yan Yan , Zhang Xiao Jun , Ma Li Jing , Wang Li Xin , Li Ke , Lei Ming Ming , Yao Fang , Li Xiao Ning , Ren Yong Long
Published: January 2014

Using optical fiber sensing technology to monitor the micro-deformation of the contacts for electric connectors. In this paper, the test scheme on the micro-deformation of the contacts of electric connectors is established; the micro-deformation test circuit is designed; and micro-deformation detecting test of the contacts for the electrical connectors is conducted under different temperature stresses conditions. Finally, the feature of the deformation affected by high temperature is analyzed.
Design and Implementation of Gas Stove and Range Hood Integrated Intelligent Control System
Authors: Zhu Qi , Gao Ming Yu , Xie Jian Jing , He Zhi Wei
Published: January 2014

In this paper, a gas stove and range hood integrated intelligent control system based on wireless communication is introduced. This system enables range hood running through wireless communication without human intervention, and gas stove can directly and automatically control the opening, the wind speed and closed of range hood. Compared to traditional gas stove and range hood, it implements the gas stove and range hood work together to make the operation more safe, convenient and fast. Through experimental test, the proposed design is feasible to achieve the gas stove and range hood integrated intelligent control system design requirements.
Variable Frequency and Multi-Pressure Water Supply Control System Based on STM32 Processor
Authors: Lou Jia Xiang , Zhang Hong Fang , Gao Ming Yu , He Zhi Wei
Published: January 2014

In this paper, a kind of variable frequency and multi-pressure water supply control system based on STM32 processor is designed. It can adjust the water pressure dynamically, according to the changes of water flow. Therefore, it can economize the energy consumption significantly. In order to improve real-time performance, the system adopts STs STM32F407 series processor which is based on ARM® CortexTM-M4 32-bit RISC core. It is used to collect the water flow, pressure and other data in real time, and automatically adjust the output frequency to control the motor speed, according to the set pressure value, and ultimately control the flow and pressure of the water supply system. According to the test, this variable frequency and multi-pressure water supply control system based on STM32 processor can meet the design requirements.
The Study on the Compensation for Displacement of Multi-Way Valve Main Spool
Authors: Liu Jin Gang , Kuang Shui Zhang , Zhu Jian Ren , Chen Jian Wen
Published: January 2014

A compensation algorithm, based on the steady-state fluid force of spool, was proposed to reduce the error between the actual and theoretical spool displacement obtained from indirect measurement method and equilibrium of the pilot pressure and spring force, respectively. The steady-state fluid force of spool was calculated and the force analysis was carried out on the spool. Study on the influence of the steady-state fluid force on spool displacement during the spool movement. Finally, the relationship curve between the compensated flow area of valve port and the spool displacement was established. The error of spool displacement was effectively reduced and the accuracy of the test was improved by the proposed compensation method, thus it can provide certain reference value for the design of multi-way valves.
The Factors Sensitivity Analysis of Drift Ice Impact Force on the Pier
Authors: Zhang Su Feng , Yu Tian Lai
Published: January 2014

This paper base on the actual form and structure of the original bridge piers actual data, according to the exposure collision theory and nonlinear finite element analysis theory, using LS-DYNA software, research the realationship of drift ice strength, modulus of elasticity, thickness factors with affecting convection ice impact force, while the drift ice impact force impact of the bridge was tested and simulated contrast. Simulation results show that the impact force with the flow of ice floe strength, elastic modulus, the increase of the thickness of the ice sheet was an increasing trend.
The Numerical Control Turning Processing Fixture Design U-Shaped Thin-Wall Parts
Authors: Sun De Ying
Published: January 2014

This paper mainly studies through improving the structure of fixture ensure u-shaped thin-wall workpiece shape accuracy of the numerical control turning processing technology. Mechanical processing technology in the form of case analysis theory understanding and application in practical production, and provides a method for machining similar workpiece.
Performance Analysis of Chaotic Spread Spectrum Sequences
Authors: Liao Chun Guang , Liu Ping
Published: January 2014

The properties of chaotic maps based on Logistic map, Tent map, Improved Logistic map and Chebyshev map are analyzed in this paper .Then we discuss the performance of correlation, balance and run-length of the chaotic binary sequences . Simulation results show that the characteristics of chaotic sequences are similar to the traditional pseudo-random sequences, and chaotic sequence is suitable for direct sequence spread spectrum systems as spreading sequence.
Optimal Planning of Distributed Generation Using Self-Organizing Optimization Algorithm
Authors: Song Wen , Li Qi Qiang
Published: January 2014

Recently, distributed generation (DG) has gained lots of attention due to a variety of benefits it can bring to the traditional power produce and distribution system. Identify the optimal location and size of DG in the distribution network is one of the crucial problems of DG integration, because a non-optimal planning might cause some adverse effects. In this paper, an optimization model with the consideration of minimizing energy losses is formulated first, and then an optimization methodology based on the Self-organizing Optimization Algorithm (SOA) is proposed. Finally, a case study is carried out to demonstrate the effectiveness of the proposed procedure.
The Application Base on Frame Optimization Method in the Rectangular Hole Group Position Error
Authors: Zhang Rong
Published: January 2014

This paper focuses on the frame optimization method for evaluation of the hole group position error principle, a detailed description of the hole group position error the importance of theory in practical applications, mathematical model established the assessment hole group position error, and the preparation for solving the hole group position error C language program, computer measurement data processing and optimization.The proposed method to solve the quantitative measurement and evaluation of the position error, should be widely applied.
Bath Central Heating and Air Conditioning Systems Economic Analysis
Authors: Yang Jin Gang
Published: January 2014

According to the building to its own characteristics, functions, and local circumstances existing cold source author believes that the heating and air conditioning system to determine which technology lies cold and heat source and system solutions optimize indoor hot and cold source program will directly greatly affect the project's initial investment and operation costs and system management service effectiveness.
Numerical Simulation of Heat Transfer from Hot Dry Rock to Water Flowing through a Circulation Fracture
Authors: Dou Bin , Gao Hui , Zhou Gang , Ren Lei
Published: January 2014

This paper presents an advanced computational modeling of natural fracture networks in hot dry rock (HDR) reservoirs. A mathematical model is developed for describing the heat energy extracted from a HDR in a multi-well system. The model stochastically simulates discrete properties of natural fractures, utilizing multi-set orientation and fractal mathematics. The simulated fracture networks are essential for further stimulation and fluid flow studies. The results show that the heat extraction effectiveness is affected significantly by the well spacing, well radius, reservoir thickness, and pumped flow rate in a multi-well system. The water temperature decreases with increasing pumping rate and increases with the well spacing, well radius, and reservoir thickness. This paper also examines the detrimental effects of the simulated natural fracture network on the stimulated fluid flow capacity. The effective permeability enhancement (due to hydraulic stimulation) is found almost proportional to the density of the reservoir natural fractures.
Experiment-Calculated Investigation of the Forced Convection of Nanofluids Using Single Fluid Approach
Authors: Minakov Andrey V. , Lobasov Alexander S. , Pryazhnikov M.I. , Guzei D.V.
Published: January 2014

An experiment-calculated investigation of forced convection of nanofluids based on Al2O3 nanoparticles was carried out. The hydrodynamic description and a model of homogeneous nanofluids were used. The homogeneous nanofluids model assumes that the hydrodynamics and heat transfer can be described by conventional Navier-Stokes and heat transfer equations with the physical parameters corresponding to nanofluids. The results showed that this model very well described the experimental data in some cases. However, in some other cases, there are discrepancies between experiment and theory that can be explained by the real heterogeneity of nanofluids and the errors in the experimental determination of thermal conductivity and viscosity of nanofluids.
Experimental Study of Internal Forced Convection of Ferrofluid Flow in Porous Media
Authors: Sehat Ashkan , Sadrhosseini Hani , Shafii M. Behshad
Published: January 2014

This work presents an experimental study of the effect of a magnetic field on laminar forced convection of a ferrofluid flowing in a tube filled with permeable material. The walls of the tube are subjected to a uniform heat flux and the permeable bed consists of uniform spheres of 3-mm diameter. The ferrofluid synthesis is based on reacting iron (II) and iron (III) in an aqueous ammonia solution to form magnetite, Fe3O4. The magnetite is mixed with aqueous tetra methyl ammonium hydroxide, (CH3)4NOH, solution. The dependency of the pressure drop on the volume fraction, and comparison of the pressure drop and the temperature distribution of the tube wall is studied. Also comparison of the wall temperature distribution, convection heat transfer coefficient and the Nusselt numbers of ferrofluids with different volume fractions is investigated for various Reynolds numbers (147 < Re < 205 ). It is observed that the heat transfer is enhanced by using a porous media, increasing the volume fraction had a similar effect. The pressure coefficient decreases for higher Reynolds number. The effect of magnetic field in four strategies, named modes, on ferrofluid flow through the porous media is presented.
Flow Structures behind Cylinders of Different Diameters Arranged Side-by-Side at Small Gap Ratios
Authors: Kuo Cheng Hsiung , Tseng Sen Yun , Hsu Sun Wen
Published: January 2014

The flow structures and their interactions behind side-by-side cylinders of unequal diameters at small gap ratios are studied by dye-flow visualization and particle image velocimetry at Reynolds number 1000. The whole-field mean and fluctuating velocity distributions and evolutions in the wakes are studied by the particle image velocimetry. As the gap ratio decreases, the mutual interaction of the wakes behind side-by-side cylinders pushes the recirculation region behind the large cylinder farther downstream at the expense of deterioration of the wake behind small cylinder. This change is important and may be relevant to the applications of passive flow control strategy.
Numerical Investigation of the Viscous Dissipation Term on 2D Heat Transfer
Authors: de Campos M.D. , Romão E.C. , Mendes de Moura L.F.
Published: January 2014

In this paper are analyzed, using high-order finite difference method, applications in which the viscous dissipation term can be neglected or not in the heat transfer equation. Some examples using various numerical values for the velocity field show that the viscous dissipation does not affect significantly the temperature field. Using the L2 norm, the numerical solution is compared with some examples that have an analytical solution.
Oily Water Treatment Using Ceramic Membrane in Presence of Swirling Flow Induced by a Tangential Inlet via CFD
Authors: Mota Tássia Vieira , Alves Helton Gomes , Neto Severino Rodrigues Farias , de Lima Antônio Gilson Barbosa
Published: January 2014

In recent years, attention has been given to the processes controlling the emission of oily effluents and their environmental impact. Many industrial processes generate large volumes of water contaminated with oil, called oily waters. The oily water must be treated before its discard in order to meet the criteria established by environmental agencies (for example in Brazil, 20 mg/L). In present days, the process of separating oil/water with ceramic membranes has attracted the attention of many researchers [1,2]. In this sense, the aim of this study is to evaluate the influence of the tangential inlet shape in the oil/water separation via ceramic membranes. We use a mathematical multiphase flow model to describe the oil-water separation, based on the particle model. Here oil is the dispersed phase while water the continuous phase. To model the turbulence effect we use the RNG k-ε model. All simulations were carried out using the Ansys CFX ® commercial code. Results of streamlines and velocity, pressure and volume fraction of phase fields are present and analyzed. The numerical results indicate that no significant difference when using a circular or rectangular pipe with the same cross-sectional area.