bluuebunny/crossref_metadata_2025 huggingface dataset:
On Pumping Ultra-Early Strength Concrete of Artificial Sand
Authors: Lin Yue Zhong , Lin Dong Cai
Published: February 2012

With the gob-side entry retaining technology in coal mining project, the materials research of backfill for mine gateway side and development to become the focus of attention. This study is based on the need of Faer coal mine to adopt P42.5 portland cement, Tz-1 early strength agent, Tj-1 super plasticizer, prepared from 8 hours to form removal, 16 hours strength of up to 7.9MPa, 24 hours strength of 19MPa, 3 day strength to 37MPa, and the construction of super-excellent early strength pumping artificial sand concrete, and obtained satisfactory results through engineering.
The Research on the Monitoring System for Conveyor Belt Based on Pattern Recognition
Authors: Wang Chuan Qi , Zhang Jian
Published: February 2012

Currently, the measures for monitoring the conveyor belt from tearing are all in contact-type, therefore, the recognition would only be valid while the leakage of material occured or the belt dropt, since the belt has been torn with a certain length. Then, at that time, the economic losses would be caused. Furthermore, the related devices for monitoring belt would cause abrasion due to contact friction, which is harmful for belt. In this research, a contactless monitoring method based on image processing and pattern recognition would be discussed, which is able to provide an effecient way to monitor conveyor belt in real time and with non-blind area. While the tearing occurs, the system enables to generate the signal for shutting off, then to protect the belt maximumly.
Based on Cult3D of Virtual Reality Technology Applied Research
Authors: Jin Shi Wei , Zhao Ying Nan , Wu Zhi
Published: February 2012

Cult3D is a widely used Web3D implementation technology recently, which with high compression, strong interaction, cross-platform advantages.JAS is a set of java programs which has been compiled, combining with Cult3D, it can make three-dimensional development of the network in a more fast, convenient, efficient way. This paper introduces many Optimization Technique when making Cult3D development, especially introduce the optimization strategy on the Cult3D products which use the JAS technique.
Direct Torque Control System of Induction Motors with a Fuzzy Self-Adaptive Speed Controller
Authors: Liu Jing
Published: February 2012

Conventional direct torque control has some disadvantages. It has the property of hysteresis, which only takes two value controls regardless of how much the error is. A simulation model of fuzzy direct torque control system for induction motors is built. And a fuzzy direct torque control system with an adaptive PD-type fuzzy logic speed controller is designed. The simulation result proves that this method is reasonable and offers a new thought way for designing and debugging actual control system of induction motors.
Direct Torque Control of the Genetic Neural Network under the Low-Speed
Authors: Zhang Lian , Lai Wei , Li Jie
Published: February 2012

For the direct torque control of asynchronous motor rapid response and speed ripple, this article proposes the genetic neural network algorithm based on the model of stator flux, to achieve the selecting of switch state under the low-speed. Using the global optimization and search method of genetic algorithm obtains global optimal solution, while the connection weights and network structure learning improve the training effectiveness of neural network, so that the BP network has better adaptive characteristic. The effectiveness of the design is verified by the simulation, and it shows that the speed control system has good dynamic performance and steady state performance under the low-speed.
An Analysis on Electrical Conduction Spatial Characteristics in Saline-Alkali Soil
Authors: Zheng Xing Ming , Zhao Kai , Gu Ling Jia
Published: February 2012

This paper mainly analyzes the spatial distribution of electrical conduction (EC) in the five study areas using the measured data by EM38. The analysis on electrical conduction spatial variation is conducive to correctly understand the electrical conduction measurement results in saline-alkali soil. Based on the analysis of sampled electrical conduction data, the following conclusions are obtained. First, the spatial variation of electrical conduction is related to its mean. From a macro point of view, the greater the mean of electrical conduction is, the stronger spatial heterogeneity will be. This relationship may not be met when two study areas have the similar mean of electrical conduction. Second, the spatial autocorrelation length of electrical conduction distribution is the description of the spatial correlation relation changes with distance, while the sill of electrical conduction indicates the amplitude of electrical conduction spatial variation. Finally, the discrete Fourier transform results show that electrical conduction has different spatial period in the five study areas.
Research and Development of Software System for Differential-Pressure Leak Detector
Authors: Zheng Chun Jun , Zhang Yong Qiang
Published: February 2012

This paper suggests the system architecture of a differential-pressure leak detector and the design of its software functional modules. It also elaborates on the key technologies for system implementation, such as key input engine design, calculation of differential pressure sensor values and measurement result judgment criteria.
Optimization Analysis for Radial Support by Finite Elements Method
Authors: Li Cheng Ming , Wang Yi Fan
Published: February 2012

Primary mirror’ surface figure is affected by supporting structure obviously. Especially for large-aperture telescope, the surface figure is significant because of primary mirror’ self-weight. For the requirement of the usage, it’s necessary to minimize the surface figure from self-weight by reasonable supporting scheme. The text optimized support point and force of radial support to minimize the surface figure by finite-element software. At the same time, it studied the relationship between support point and counterweight to reduce the weight of support structure. At last, it gave the optimal solution.
Aluminum Semi-Solid Slurry Viscosity Measured Steady-State and Computer Simulation Compared
Authors: Guo Rui , Zhang Li Ming
Published: February 2012

This article take the new AlSi6Mg2 alloy as the object of study, has carried on the analog computation in Fan and in the Chen microscopic model foundation to its half solid state pulp stable state viscosity.And with Zhou Zhihua et al. [8] the empirical data has carried on the comparison.The result indicates the theory predicted value and the empirical datum basic match case.
A New Backstepping Sliding Control Technique for Hybrid Vehicles Engine Idle Speed Control
Authors: Luo Dong Song , Zhao Hai Feng
Published: February 2012

In the paper, the idle speed control problem for hybrid vehicles engine is investigated. The mathematics equations about dynamic characteristic of engine’s primary subsystems are presented in the view of the physical characters of engine. A new back stepping sliding mode controller was designed based on the simplified model of engine, and the simulation results show the great improvement of engine control performance, especially to overcome the disturbance.
Influence of Filling Machine Pipe Orifice Outflow Characteristics on Setting-Off of Fluid
Authors: Yang Fu Xin , Ding Yong , Bao Jian Qiang
Published: February 2012

The characteristics of filling machine pipe orifice laminar flow, turbulent flow and the energy loss in fluid were studied in this paper. And, the influence of the characteristics on the forming droplet in pipe orifice and the setting-off for fluid were analyzed too.
Low Pass Filters Based on T-Shaped Defected Microstrip Structure
Authors: Li Tian Peng , Wang Guang Ming , Xu He Xiu , Lu Ke
Published: February 2012

In this paper, a T-shaped defected microstrip structure (DMS) which can provide rejection band and slow-wave is studied in detail, then two low pass filters based on T-shaped DMS are proposed, designed and manufactured. Consistent simulation and measurement results have confirmed the design concept and indicated that the proposed filters have a series of advantages such as simple in design, little in electromagnetic leak, and also compact in size which facilitates the integration to some degree.
Study on the Photocatalytic Properties of Nano-CdS Crack-Free Thin Films for Removal of Rhodamine B
Authors: Qin Ai Miao , Chen Hai Nian , Jiang Kun Peng , Liao Lei , Yu Wei Ping , Tang Ping
Published: February 2012

Nano-CdS crack-free thin films were deposited on the conductive glass substrate with a two-electrodes DC electrochemical deposited method at low temperature (<100°C). The structure and properties of thin film catalysts were characterized by X-ray diffraction (XRD), SEM and AFM. Photocatalytic reactivities of nano-CdS thin film were conducted for removal of Rhodamine B (RB) in aqueous solution under ultraviolet light irradiation. The effect of the concentration and pH of the RB solution, the ultraviolet light, the exposure time, the size and the reusability of thin films on the degradation of RB were studied. It was found out that the exposure time, the light wavelength, the pH of RB solution and thin film’s size have much influence on the degradation. Reusability experiments show that the catalyst has well recycle characterization.
The Mathematical Model and Simulation of Macrosegregation during Solidification Process of Super Heavy Steel Ingot
Authors: Liang Xiao Ping , Li Yu Gang , Zhao Bin , Wang Yu
Published: February 2012

Through establishing solidification-heat transfer mathematical model of the super heavy steel ingot, the temperature distribution at different moments in the solidification process of steel ingot has been simulated. Based on the simulated temperature field and the law of solute redistribution, the carbon macrosegregation in the solidification process has been calculated. The results show that, the complete solidification time of the 600T steel ingot is 68.34 hours, and positive segregation of carbon forms in the ingot head, and the concentration of carbon near the upper axis which is higher than 81 percent of the ingot’s height is over 2 times than the average value.
Study on the Regularity of the Natural Gamma-Rays Attenuation in the Slurry Water
Authors: Zhang Cheng Lian
Published: February 2012

Gamma-ray density meter has been widely used in coal preparation plant to detect the concentration of the slurry water, but it require annual inspection, approval, and the protection of the radioactive sources causes a lot of inconvenience to the coal preparation plant. In this paper a natural mineral sand beach has been chosen as radioactive sources, which contains thorium. An experimental device has been designed to detect the concentration of the slurry water, the natural gamma-rays attenuation rules were obtained after lots of experiments in the laboratory when it passing through the different concentration of the slurry water, and the rules were proved in theory and in tests. This provides reliable basis for design of slurry water concentration measurement device.
Super-Resolution Restoration for Image Based on Entropy Constraint and Projection onto Convex Set
Authors: Li Xiao Qin , Fang Kang Ling , Jin Can
Published: February 2012

Super-resolution reconstruction for image breaks through the resolution limit of imaging systems without hardware change. The algorithm of projection onto convex set (POCS) is a typical super-resolution reconstruction algorithm in spatial domain. The classical algorithm of POCS lacks the overall constraint for the image, and the convergence rate for iteration is incontrollable. A new super-resolution restoration algorithm for image based on entropy constraint and POCS is proposed in this paper, and experiments with optical and millimeter wave images demonstrate that the new algorithm is effective in improving the precision of super-resolution restoration.
Study on Performance of PP/POE In Situ Compatibilization
Authors: Yang Yun Feng , Hu Guo Sheng , Ren Xing Lin
Published: February 2012

By the in situ compatibilization, PP/POE blends were prepared with dicumyl peroxide (DCP) as initiator, Trimethylolpropane triacrylate (TMPTA) as co-during systems and the metallocene polyolef in elastomers ploy (ethylene-1-octene) (POE) as toughening rubber. The effects of additive amount for TMPTA、POE on the mechanical properties were studied. The results showed that the maximum value of the room-temperature and low-temperature impact strength for the composite was reached to 52.03KJ/m2 and 37.29KJ/m2, and the elongationfor was reached to 482.74%.
Wireless Real-Time Telemetry Automatic System for Monitoring the Settlement of Structure and its Application
Authors: Zhang Guo Liang , Zhang Xue Min , Li Jie , Wang Shu Ying
Published: February 2012

An intelligent system, which is real-time, remote, and automatic for monitoring the settlement of surface subsidence or building, was developed based on the principle of communicating vessels. The Hydrostatic leveling, displacement sensors, data acquisition and transmission, 3G wireless communications module, computer terminals, and data processing software were integrated in the system, which has the following functions: monitoring data real-time acquisition and transmission, automatic calculation and analysis of the settlement, and early warning by remote wireless mode. The system has been successfully applied in the Minzhi station project of Shenzhen Metro Line 5 to ensure the normal operation of existing railway. Meanwhile, the high accuracy and reliability of the system are also verified by the engineering applications. It can be applied to monitor the settlement of similar projects.
Two-Sensor Information Fusion with Out-of-Sequence Measurement
Authors: Zhang Xi Bin
Published: February 2012

In sensor tracking system, Out-Of-Sequence Measurement(OOSM) always occur due to communication delays. The system needs to update the OOSM in order to improve the precision. An optimal information fusion estimation weighted by scalars is presented for two-sensor information fusing with OOSM, which considers correlation between local errors, and avoid to compute the weighted matrix. It is easy to apply in real-time.
Study on Target Tracking Technology in Control of Robot Visual Servo
Authors: Sun Li Gong , Zhang Lei Ming , Xiang Fei
Published: February 2012

Robot visual servo system is an important field of robotics research. The paper regards CCD camera as the eye of robot, with the location information, using Kalman filter, predicts the tracking of moving target in the field of vision, achieves the target tracking and proves the effectiveness of this method by experiment.
The Effect of Heat Treatment on Corrosion Resistance of Ni-W-P-Al2O3 Composite Coating
Authors: Sun Wan Chang
Published: February 2012

Abstract. Ni-W-P-Al2O3 electroless composite coating was successfully co-deposited on 45 steel substrate using electroless plating. Optical microscope (OM), X-ray diffraction (XRD) and potentiodynamic polarization were used to analyze the morphology, microstructure and corrosion resistance of the composite coating. The results show that Al2O3 particles co-deposit homogeneously, and the structure of the composite coating as deposited is amorphous and crystallite. After heat treatment, the amorphous structure of the composite coating appears a precipitation transformation. When annealing at 400°C, because of the emergence of crystal defects brought out by the precipitation of crystal phases, the composite coating exhibits the lowest corrosion resistance. As the annealing temperature rising to 600°C, the crystalline structure continually grows up and the precipitation transformation tends to be completed. Then the crystal defects decreases which results in an improvement to the corrosion resistance of the composite coating.
The Study of Temperature Control Hydraulic Sensor
Authors: Zhang Yan Jun , Kou Zi Ming , Gao Gui Jun , Zhang Jun
Published: February 2012

Abstract. To improve the automation degree in special working environment which contains explosive gas. We develop a new type of temperature control hydraulic sensor basically on theory and lots of experiments. As the temperature reaches about 85°C，the motion part of the inductor will stretch to a certain length, and then it will push the adjusting rod. Simultaneously，the adjusting rod will overcome the elastic force of the spring and compel the spool valve to deform, and finally the control valve port will be open, it allows the control oil of the hydraulic system to pass. At last it reaches our destination that we can make the control of hydraulic circuit be realized.
Study on Preparation and Properties of Precipitated Silica
Authors: Liu Quan Xiao , Xu Wen Cai
Published: February 2012

In this paper silica are made in the production line and its properties are investigated. It shows that the content of SiO2 of BSZ1 is 90.24%, its specific surface area of BET is 204.70m2/g, its CTAB is 240m2/g, its oil absorption value of DBP is 2.82cm3/g, and its particle size of D50 is 5.71μm. The content of SiO2 of BSZ2 is 94.16%, its specific surface area of BET is 245.07m2/g, its CTAB is 212m2/g, its oil absorption value of DBP is 2.86cm3/g, and its particle size of D50 is 2.82μm. The content of SiO2 of BSZ3 is 92.43%, its specific surface area of BET is 355.90m2/g, its CTAB is 273m2/g, its oil absorption value of DBP is 2.70cm3/g, and its particle size D50 is 5.71μm. BSZ2 and BSZ3 are amorphous state with silanol groups on their surfaces, and they are the spherical particle with some irregular granules. BSZ1 and BSZ2 are good application in rubber as reinforcing agent.
Single Frame Infrared Image Targets Detection Based on Multi-Mixture Filters Model
Authors: Li Yang , Wang Jia Bao , Lu Jian Jiang , Miao Zhuang , Fang Peng Fei
Published: February 2012

To detect the targets in single frame infrared image, a target detection method based on multi-mixture filters model were proposed. The multi-mixture filters model involves four modules. Firstly, smooth filter is used to restrain and eliminate random noise. Secondly background Gaussian filter is used to construct a rough background model. Thirdly target Gaussian filter is used to construct an accurate target model. Finally morphologic filter is used to optimize the final target shape. Experiments show that this method can achieve a higher detection efficiency and accuracy.
Research on Space Robot Shared Control System Based Augmented Virtual Reality
Authors: Li Hua Zhong , Liang Yong Sheng , He Tao , Li Yi
Published: February 2012

Space Robot Shared Control System (SRSCS) and its virtual reality simulation technology have been mainly researched in this paper. First, Shared control system for space robot combined autonomous control with teleoperation has been put forward. Then, Simulation system architecture for SRSCS based on three dimension virtual model has been developed. Finally, computer graphics visualization simulation has been finished successfully.
The Numerical Research on the Scramjet Combustion with Different Structure Cavity
Authors: Gao Peng , Chang Xin Long , Luo Lei , Cao Yu Ji
Published: February 2012

In this paper, the detailed numerical simulations were performed in the hydrogen fuel combustion chamber with some different structure cavities. Through the analysis found that the effect of stabilized fire burning at supersonic flowing and mixed fuel and air are quite different. The research results will preferably represent the burning field in scramjet combustion so that the better performance flame stabilizer can be designed.
Study on the Nonlinear Vibration of Complex Rotor System under the Effect of Temperature Fields
Authors: Zhang Ju Wei , Sun Chun Yi , Zhu Xiang Zhe
Published: February 2012

In this paper, the flow and heat model of high pressure rotor (HPR) has been established in condition of nature convection at different parking times. The flow and temperature fields of the HPR were studied by using CFD. Moreover, the continuous finite element model with multiple nodes of the rotor system was established considering the asymmetric temperature effect. Comparison of different models between ignoring and considering temperature fields was employed in detail. The calculated results show that the vibration amplitudes are increased and the orbits become disordered when the parking temperature field is considered for the HPR. In the frequency spectrum, there are abundant frequent components caused by temperature and rubbing force and the vibration characteristics considering temperature effect are more complicated than ignoring it for the HPR.
The Fire Surveys Studies Based on the Fuzzy Clustering and the Neural Network
Authors: Zheng Yan Ling , Wang Zhan Kui , Ning Xin
Published: February 2012

Lowly accuracy in view of the present fire which exists, reporting mistakenly rate is high, as well as with difficulty giving alarm in time, this article has made the improvement and the analysis from many aspects. Regarding to the signal collected, based on the analysis of fire signal characteristic, I used FCM method to carry on the judgment, and used fuzzily clustering nerve network method to make the further improvement, unified the improvement effec of the method through the simulation and the experiment. In brief, through this article research, I surveyed the algorithm for the fire to carry on further inquired into that. It has the certain practical significance to the the development of the fire survey studies.
The Design of HTG Automatic Calibration System Based on Fuzzy Theory
Authors: Ren Qi , Ren Tian Fei
Published: February 2012

ABSTRACT：It introduces a kind of an Automatic Calibration System, especially for long-term drift of oil tank gauging system. long-term drift serious influence on measuring the accuracy and reliability of the system. With theory of Hydrostatic Tank Gauging[1]（HTG），as soon as the long-term drift occurring, the detection drift of oil pressure valueΔp will drift，and soon other the parameters of tank Gauging will be occurred. Because the value of Δp is difficult to directly determine, This paper puts forward a kind of automatic calibration method to obtain Δp according to the fuel level drift Δh) indirectly,By means of the HTG double level switches and fuzzy control theory. At last, by MATLAB simulation verify the correctness of the system design.
Legal Analysis of Dispute Settlement Mechanism on Medical Emergencies
Authors: Chen Jun , Yu Dong Wei
Published: February 2012

Emergency dispute settlement mechanism, an important part of the legal system dealing with unexpected events, is facing new challenges from the increasing medical emergencies in recent years. The existing litigation system is increasingly inadequate in dealing with current medical emergencies. This paper analyzes the deficiencies of current dispute resolution mechanism in dealing with medical emergencies. Combined with the legal attributes and importance of medical law, this paper proposes a plan to establish medical legal proceeding mechanisms and supporting programs, which is to utilize specialized medical court arbitration system to resolve legal issues involving medical emergencies.
Evaluating the Performance of Training Algorithms in Active Noise Control Using MLP Neural Network
Authors: Salmasi Mehrshad , Mahdavi-Nasab Homayoun
Published: February 2012

Passive methods are costly and ineffective in noise reduction at low frequencies. Active noise control has been suggested because of these problems. Active noise control (ANC) is based on the destructive interference between the noise source waves and a controlled secondary source. In this paper, various training algorithms are compared in active cancellation of modeled sound noise using MLP neural network. Colored noise signals are used as a model of sound noise instead of noise signals from databases. An MLP neural network with different architectures is used in simulation procedure. The effect of number of neurons on the convergence speed of various training algorithms is investigated in this paper. Levenberg-Marquardt (LM), scaled conjugate gradient (SCG), BFGS quasi-Newton (BFG), resilient back-propagation (RP) and variable learning rate back-propagation (GDX) are used for training the network. Simulation results show that Levenberg-Marquardt (LM) and scaled conjugate gradient (SCG) are the fastest training algorithms.
The Application of an SD Card in Debugging an Embedded System
Authors: Wei Chong Yu , Gu Zu Ping , Huang Shuai
Published: February 2012

In this paper, a new method using a Secure Digital Card in debugging an embedded system based on Android and its implementation are introduced. In debugging an embedded system, downloading image files to a RAM on a printed circuit board generally uses a net interface module and a server based on Trivial File Transfer Protocol (TFTP). Here a new method using an SD card is introduced. Compared with downloading by a TFTP server, the method is simple and inexpensive. In the paper, an SD card and its controller are introduced first. Then the designed circuit is presented. Third, two operation modes of the SD card, card identification and data transferring are analyzed in detail. Fourth, the structure of the FAT32 file system and the process for downloading image files into a RAM on board are shown.
Evaluation of Silicate Iron Slag as a Potential Methane Mitigating Method
Authors: Wang Wei Qi , Li Peng Fei , Zeng Cong Sheng , Tong Chuan
Published: February 2012

Application of electron acceptors to mitigate CH4 emissions form paddy fields deserves special attention, especially for ferric iron oxides as its dominant role over all other redox species. Silicate iron slag is a by-product of the steel industry.We added it in the experiemental sites of paddy fields in the Fuzhou Plain, a subtropical coastal plain region.. After the addition of the silicate iron slag, the soil showed a lower soil Eh and higher pH, especially at the early period of cultivation(about one week). CH4 emission during the cultivation period significantly decreased, about 26.4%, 43.3% and 48.9% for 2 Mg ha-1, 4 Mg ha-1and 8 Mg ha-1 silicate iron slag treaments, respectively. In conclusion, silicate iron slag could be considered as an effective method to mitigate CH4 emissions from subtropical paddy fields.
Effect of Ultra-High Pressure Treatment on Tenderness of Sea Bass
Authors: Shang Xiao Lan , Zheng Jie , Liu An Jun
Published: February 2012

The myofibrillar fragmentation degree (MFI), value of pH and the degradation degree of sea bass with high pressure treatment were studied. The results showed that the degradation degree of protein, MFI and pH of sea bass increased as the pressure increasing, indicating that ultra high pressure treatment could change the tenderness of sea bass muscle, which has a certain practical significance in the food industry.
Flow Field Analysis of Pulse Converter Exhaust Manifold of Diesel Engines
Authors: Zhong Wen Jun , He Zhi Xia , Jiang Zhao Chen , Huang Yun Long
Published: February 2012

A three-dimensional unsteady flow for the pulse converter exhaust manifold of 8-cylinder diesel engine was numerical simulated to get the flow characteristics of the exhaust manifold. Simulation results show that there are strong eddy flows, low pressure closed recirculation flow region in the exhaust manifold. Afterwards the structure optimization of the exhaust manifold with baffle was put forward and then the unsteady flow in the normal exhaust manifold, the exhaust manifold with baffle of 30 degrees and the exhaust manifold of 15 degrees were simulated and analyzed. It is concluded that the exhaust manifold with baffle is better than that without baffle, the recirculation flow region and the pressure loss in the exhaust manifold with baffle of 30 degrees is smaller than in it with baffle of 15 degree and the flow in the former exhaust manifold is much smoother.
Fuzzy Neural Network Hybrid Learning Control on AUV
Authors: Zhao Jing , Han Zhao Lin , Fang Yuan Yuan
Published: February 2012

A novel controller based on the fuzzy B-spline neural network is presented, which combines the advantages of qualitative defining capability of fuzzy logic, quantitative learning ability of neural networks and excellent local controlling ability of B-spline basis functions, which are being used as fuzzy functions. A hybrid learning algorithm of the controller is proposed as well. The results show that it is feasible to design the fuzzy neural network control of autonomous underwater vehicle by the hybrid learning algorithm.
Fatigue Crack Growth of Ti-15V-3Cr-3Sn-3Al Alloy
Authors: Chang S. T. , Li W. J. , Tsay L.W.
Published: February 2012

In this study, the fatigue crack growth rates (FCGRs) of Ti-15V-3Cr-3Al-3Sn alloy aged in the temperature ranges from 426 to 593 oC for 8 hrs was determined at stress ration of 0.1 or 0.5. The results of fatigue crack growth tests revealed the FCGRs decreased with increasing aging temperature. Generally, the 426oC aged specimen had the highest FCGRs among the specimens being tested, regardless of stress ratio. It was noted obvious increase in FCGRs occurred for the 482oC aged specimen at stress ratio of 0.5. Fatigue fracture appearance of various specimens tested in air exhibited predominantly transgranular fatigue fracture with coarse stripes for the specimens aged at/above 538oC. Intergranular fracture was more likely to be found in the 426oC aged specimen, and for the A482 specimen tested at high stress ratio.
DCC Analysis of the Two Stock Market Returns by a Threshold Model: Empirical Study of the Stock Markets in Japan and Canada
Authors: Horng Wann Jyi , Hu Tien Chung , Huang Ming Chi
Published: February 2012

The empirical results show that the dynamic conditional correlation (DCC) and the bivariate asymmetric-IGARCH (1, 2) model is appropriate in evaluating the relationship of the Japan’s and the Canada’s stock markets. The empirical result also indicates that the Japan and the Canada’s stock markets is a positive relation. The average estimation value of correlation coefficient equals to 0.2514, which implies that the two stock markets is synchronized influence. Besides, the empirical result also shows that the Japan’s and the Canada’s stock markets have an asymmetrical effect, and the variation risks of the Japan’s and the Canada’s stock market returns also receives the influence of the good and bad news, respectively.
Mechanical Properties of 5052 Al Alloy Processed by Groove Pressing
Authors: Yang Kai Huai , Lin Na , Zeng Shao Feng , Chen Wen Zhe
Published: February 2012

Three groups of commercial 5052 Al alloy sheets were subjected to groove pressing (GP) at room temperature using parallel GP, 180° cross GP and 90° cross GP, respectively. Mechanical properties and fracture modes of as-annealed and GPed samples were investigated. The microhardness of the samples processed by parallel GP increases by a factor of about 1.6 compared to the as-annealed state, and that of the samples processed by cross GP is higher. The ultimate tensile strength (UTS) increases significantly after GP, while the elongation decreases. But they are strongly dependence on the number of GP passes and the pressing modes. Besides, fracture surface morphology demonstrates that the fracture mode is ductile even after four passes. With increasing the number of GP pass, the amount of small dimples increases, and the dimples become shallow and more uniform.
Mechanism and Confirmation in Compact Spinning with Suction Groove
Authors: Ma Hong Cai , Lu Shi Lin , Cheng Long Di , Xu Shi Ping
Published: February 2012

Compact spinning eliminated the harmful effects of spinning triangle, as the edge fibers are incorporated into the yarn due to the elimination of the spinning triangle. The compact yarns possess less hairiness, higher breaking strength and breaking elongation compared with the conventional ring-spun yarns. In this article, we study the mechanism of compact spinning with suction groove and analyze the compact action in twisting fiber strip. Some quality parameters of wool compact spinning with suction groove are compared with those of wool conventional ring-spun yarns. The changes of hairiness are analyzed in the different spinning conditions. This provides related data for improving compact spinning system with suction groove.
Integration of close Range Photogrammetry and Structured Light Scanner for Cultural Heritage Documentation
Authors: Liu Jian Wei , Jiang Zhi Qiang , Sun Xin , Hu Hao
Published: February 2012

This paper proposes an integrated three-dimensional(3D) shape acquiring and digitizing method for cultural heritage documentation by combining industrial close range photogrammetry and structured light scan techniques. The operation principle is introduced, the process of raw data acquisition and data post-processing are presented . A 2.5m high ancient Buddha sculpture of over 1500 years old located in Qingyang, China was measured and modeled to test the availability and reliability of the proposed system. Compare to conventional 3D digitizing methods, the proposed system can potentially meet a number of specific needs in the field of cultural heritage documentation, it is more flexible, low cost, less field work, capable of grabbing the 3D shape of large objects, meanwhile recording accurate detail information of local area, without physically contacting with object surface.
Study on Plate Convex Contour Measurement System
Authors: Xie Dong , Wang Feng , Zhu Jian Qu
Published: February 2012

This paper presents a measurement method for plate convex contour measurement by contact force. During the measured mechanical part rotation, the stylus slides forward or backward by servo motor and ball screw movement. The contact force is detected by sensors according to distance between the measured part and the stylus. The servo motor displacement has been used to calculate the radial value from the center of rotation to the tip of the stylus, and the contour points coordinates can be measured in sequence continuous measurement. By mechanical transmission gap compensation and force compensation, the better profile accuracy and effectiveness can be gotten.
A New Life Detection System: Integration of Ultra-Wide Band Sensor into Wireless Sensor Networks
Authors: Tian Ying , Zhang Yang , Wang Jian Qi
Published: February 2012

Ultra-wide band (UWB) radar has received an increasingly concern for its unique ability in medical application. Much effort has been made to explore the feasibility of UWB radar to serve as a medical instrument. However, previous work hardly considered the issue of using UWB radar as a sensor node in wireless sensor networks (WSN). To implement the integration of life detection sensor and WSN, we designed the interface circuit to connect our UWB sensor with the ZigBee module and defined the interface communication protocol. The results showed that the UWB sensor node can communicate with the other nodes in WSN. The integration is of great significance in that, at earthquake-stricken area, we can use the system to quickly establish the WSN and carry out the rescue without depending on the surrounding environment.
Intelligent Control of Congestion Based on Multi-SoftMan
Authors: Zhao Yu Hong , Zheng Xue Feng , Tu Xu Yan
Published: February 2012

Low performance and unfairness existed in current congestion control, meanwhile network is growing rapidly. It needs a new effective congestion control to meet expanded demands and improve actual state. As a new technique framework, SoftMan is proposed with its intelligence, autonomy and initiative to bring a new idea for information system. The paper looks not only at the benefits derived from intelligence, but also at those associated with Multi-SoftMan alliance in general. After exploring these benefits, an intelligent control model of congestion control based on multi-SoftMan is proposed. At the same time, the paper visualizes the architecture and system behaviors of Multi-SoftMan intelligent congestion control system (MSMICC).
Investigation of Thermal Conductivity of Nanofluids Using Different Experimental Methodologies
Authors: Gu Bang Ming , Wang Zheng Liang , Lu Zhang Xian , Chen Shan Fei
Published: February 2012

Thermal conductivity (k) of nanofluids has been a hot area of interest. However, controversy exists in majority of the reported results make the thermophysical property of nanofluids remains vague. Dose this disagreement come from different methodologies used by different groups or any other factors? Results on k of the nanofluids, prepared by dispersing 22nm-diameter spherical Fe3O4in Polymeric α-olefin (PAO), were presented using transient-hot-wire method and 3ω method to determine the consistency of two experimental methodologies. Within the uncertainty of both methods, the obtained data showed good agreement, which confirmed that the experiment technique was not the chief factor causing the discrepancy of reported results. Thermal conductivity of Fe3O4 nanofluids can not be predicted by existing model.
Observation of Dislocations Configuration of TiAl Alloy during Fatigue Tests at Elevated Temperatures
Authors: Xiang Hong Fu , Dai An Lun , Li Hui , Li S.X. , Cui Yu You , Rang Rui
Published: February 2012

Isothermal fatigue (IF) tests were carried out on the gamma-TiAl alloy in the temperature of 500°C, 650°C and 800°C under mechanical strain control in order to evaluate its cyclic deformation behaviors at elevated temperature. Cyclic deformation curves, stress-strain hysteresis loops under different temperature-strain cycles were analyzed and dislocations configurations were also observed by TEM. The mechanism of cyclic hardening or softening during IF tests was also discussed. Results show that during the IF tests, The hysteresis loops were almost symmetrical above 600 °C, such as 650 °C and 800 °C; The hysteresis loops at the temperature of 500 °C generated two apparent asymmetry, one was zero asymmetry, the other was tensile and compressive asymmetry; Dislocation configuration and slip behaviors are contributed to cyclic hardening or cyclic softening.
Research on the Application of DPSK Technology in OFDM Doppler Receiver
Authors: Fu Yao , Chen Xue Yan , Ma Yu Feng , Wang Hong Yuan
Published: February 2012

A Doppler diversity receiver for OFDM is proposed by Kim B C[1], which requires channel estimation at the receiver, so its structure is complicated, what’s more, the receiver needs a large amount of calculation. Different from it, we use the differential phase modulation technology in the OFDM Doppler receiver, so the receiver can recover the original data without channel estimation, and the implement is simple, the computational complexity is low. However, experiment results show that the BER of the new receiver is higher than the conventional, and it can not get performance gains by diversity either.
Numerical Simulation Research on the Shape of Top Coal Drawn-Body in Gently Inclined Seam
Authors: Li Qiang , Bu Wan Kui , Xu Hui , Song Xiao Bo
Published: February 2012

The numerical model of top coal drawing in gently inclined seam is built based on PFC2d software. By comparing with the theory of drawn-body movement law, it can be obtained that the shape of top coal drawn-body accords with the theory of random medium movement. The research results show that the form of the shape equation of top coal drawn-body is uniform while the top coal caving angle is different. On the other hand, with the difference of top coal caving angle and drawing height, the shape of top coal drawn-body is differential at the meso scale, which depends on the parameters of the shape equation of top coal drawn-body.
Accurately Counting Algorithm of Incremental Rotary Encoder
Authors: Yan Dai , Wang Jing Shu , Xu Ming San , Lian Guo Fu
Published: February 2012

Base on the structure of the mechanical rotary encoder, the characteristics of the glitches and the effective waveform are analyzed. A new algorithm for removing the glitches and accurately counting is introduced. The core idea of the algorithm is to check the output of the phase-lag part when the output of the phase-advance port changes. This algorithm can accurately remove the glitches form the signal and count exactly. This method for glitches removing is very convenient, without additional cost and efficient for rapid rotation.
Non-Oscillation in Linear Delay Differential Systems
Authors: Yan Xin Zhou
Published: February 2012

In this paper, we consider the non-oscillatory problems of linear delay differential systems of odd-dimension. Based upon the corresponding characteristic equations, we get some criteria for non-oscillation by utilizing the matrix measures.
Numerical Solution on Flow Property of a Shear-Thinning Gel Propellant in a 900 Pipe Bend
Authors: Xia Xue Li , Qiang Hong Fu
Published: February 2012

To evaluate an influence of the various bend diameter ratio Rc/R and velocity on the flow property of gel propellant in a 900pipe bend, the 3D governing equations of the steady, incompressible, isothermal, laminar flow of a power-law, shear-thinning gel propellant in pipe bend were formulated, discretized and solved, a SIMPLEC numerical algorithm was applied for the solution of the flow field, which on a series of sharp 900curved pipelines with nine kinds of bend diameter ratio and the inner diameters of 8mm were used on condition of seven kinds of Reynolds numbers. The pressure and velocity distributions were obtained, the empirical equation of local resistance coefficient from numerical experiments was conducted, providing the interrelations between the best bend diameter ratio and flow velocity in engineering design. The results indicate that the pressure and velocity distributions were non-linear, and which become tremendous with increasing Reynolds numbers. The results suggest that the dot of maximum velocity occurs the wall outside of a pipe bend, and which is more near to the wall outside of a pipe bend along the flowing direction and increasing the velocity. The phenomena of particle sedimentation should be took into account to investigate the flowing behavior of gel propellant in curved pipes on condition of lower Reynolds numbers.
Zircon Geochronology of Granodiorite Porphyry in Yaojialing Mine, Anhui Province, and its Geological Implications
Authors: Liu Shao Feng , Du Yang Song , Cao Yi , Pang Zhen Shan
Published: February 2012

This study reports the petrological characteristics and zircon geochronology based on laser ablation ICP mass spectrometry. Zircons extracted from granodiorite porphyry display oscillatory zoning that suggests magmatic crystallization with the ratios of Th/U (0.34~1.20). The zircons yield early cretaceous 206Pb/238U age of (141.0±1.7) Ma that constrains the approximate timing of formation of the granodiorite porphyry. Inherited zircons yield 206Pb/238U age of (490±24) Ma and (556±27) Ma, and 207Pb/206Pb age of (2444±21) Ma implying that the granodiorite porphyry was sourced from middle and lower crust possibly.
The Integrated Testing System for Performance Parameters of the Hydraulic Excavator
Authors: Zhu Qing Yuan , Xie Wen Yi , Hou Liang , Gao Ge , Liu Xiao Hui , Guan Ming Jie
Published: February 2012

This paper designed and developed an integrated testing system for performance parameters of the Hydraulic excavator. Combined with sensing technology, computer technology and virtual instrument technology this system can detect six key parameters of the excavator including motor speed, hydraulic system pressure, attachment action time, swing speed, walking speed, current characteristics, so as to evaluate the performance of the excavator. The testing system takes full consideration of the interaction between the tester and driver, meanwhile, can automatically detect all parameters by using the parallel test method in order to make sure the whole test completed in one hour. As the testing system is designed base on the idea of modularization, it can add new modules to meet the functional requirements alone with the development of research in the future. This testing system can not only improve the test efficiency, but also be used as analysis tools for the research and optimization of performance parameters of excavators.
Patent Management in China’s Electronic Information Industry: Comments and Suggestions
Authors: Ji Yi Cheng , Liu Yun Hua , Hu Zhuo Juan
Published: February 2012

With the continuous integration of computer, networking and wireless communications industry in technique and management, information technology has entered the era of rapid replacement, as well as competition among electronic information industry is becoming more and more intense. Owning the patent is a major element to win in the current competition of electronic information industry. Therefore, it is more important to establish and improve patent management system, and implement patent strategy in the industry.
A Study on RFID Anti-Collision Algorithm
Authors: Miao Bin
Published: February 2012

Anti-collision technology is a key technology on RFID. This paper investigates some different anti-collision algorithm of RFID. And we establish a simulation platform to achieve the simulation of the anti-collision algorithm. This paper presents an improved algorithm on the DFSA anti-collision , which is based on analysis and comparisons of the simulation results. The improved DFSA algorithm can enhance the efficiency, according to the simulation results.
Study on the Performance Simulation of a Kind of Height-Adjusting Shock Absorber
Authors: Liu Qiang , Chang Zhi Bin , Sun Guo Xing
Published: February 2012

Structure characteristics and operational principle of height-adjusting shock absorber are introduced and mathematical model is also established. According to the model, simulation program is organized. There comes the damping curve of height-adjusting shock absorber.
The Design to Achieve the Data Breakpoint Survivor by Using FPGA
Authors: Li Jin Ming , Song Nan , Tan Qiu Lin
Published: February 2012

Recording data for the increasingly diverse needs, the design is using FPGA to achieve the data breakpoint deposit. Choosing NAND Flash K9KAG08U0M as data storage media , the data according to an external command realize erasing ,storage and read-back operation under the control of the FLASH-based FPGA (A3P125). The design of data breakpoints deposit can achieved interruption of data collection, and by reading the data back before the FLASH chip erase operation to comply the repeated use of data acquisition system.
Study on the Effect of Rice-Frog System on Controlling Agricultural Non-Point Source Pollution
Authors: Qiu Mu Qing , Yao Xiao Bo , Yang Li
Published: February 2012

China's agricultural production in the course of a wide range of point source pollution, large and difficult to control. Symbiotic system rice-frog as a good traditional agricultural production, with outstanding ecological, economic and other values, has been identified as globally important agricultural heritage and the first to be protected. Summary of agricultural non-point source pollution in the status quo to explain the symbiotic system rice-frog to reduce agricultural nonpoint source pollution in the role, made on the basis of frog in rice paddy planting to optimize the structure, development of ecological agriculture is the agricultural non-point source pollution prevention and control an effective way.
Tension and Shearing Characteristics of Magneto Rheological Fluid under Magnetic Fields
Authors: Wang Xiao , Wang Hong Yun
Published: February 2012

The mechanical properties of a magneto rheological (MR) fluid in tension and shearing have been studied in the magnetic field which is generated by a coil carrying different magnitudes of DC electrical current. An experiment setup was designed and fabricated to perform this operation. The magnetic behavior of the equipment was analyzed using software of ANSYS/Multiphysics. The shear yield stress represents the effect of the interaction force along the shear direction (perpendicular to the direction of the magnetic field). The tensile yield stress of MR fluids represents the effect of the interaction force between the polarized particles along the direction of the applied magnetic field. The shearing tests showed that the shear yield stress is proportional to the external magnetic flux density with an exponent of 1.19. The tensile yield stress is about four times of shear yield stress.