bluuebunny/crossref_metadata_2025 huggingface dataset:
Layer Based Energy-Balanced Reliable Routing Protocol for Wireless Sensor Networks in Coal Mine
Authors: Zhang Chang Sen , Si Yong Jie
Published: November 2013

Synthetically considering the special environment underground, we combined the wireless sensor network with the existing cable mine monitoring system, forming a new monitoring system based on Ethernet and WSN, and then we put forward a layer based energy-balanced reliable routing (LBEBR) protocol for WSN to solve the spot problem in zonal area of coal mine and to ensure the reliability of data transmission. The working face was divided into several equal rectangular layers. According to the optimal cluster radius calculated before, different numbers of nodes constituted clusters of different sizes in each layer. In the stage of data transmission, using the reliability evaluation of nodes and considering three factors, the residual energy of nodes, the distance between nodes and the reliability of nodes, to select the best next-hop node. Simulation results show that the protocol can not only balance the energy of the network, but also elude problem nodes effectively to increase the reliability of data transmission.
QoS Access Points Placement with Fault Tolerance in Wireless Local Area Networks
Authors: Chen Xian Long , Liang Li Jiao
Published: November 2013

In this paper, we study the problem of enhancing the fault tolerance of IEEE 802.11 wireless local area networks in the design stage. We aim to settle proper number of access points (APs) and carefully locate them, such that the system can tolerate AP failures while guaranteeing QoS requirement. Given a set of clients (end-users), each client has a traffic demand for Internet access. The problem of our concern is to find out the minimal number of access points and proper location, such that the fault tolerance and QoS constraint are both satisfied. That is, when there is no AP failure, the actual traffic delivery ratio for each client shall exceed the threshold. When their happens that one AP failed, the clients it served can switch to other APs with reconfiguration of the system, while providing an acceptable bandwidth. We proposed a heuristic algorithm, firstly we place one AP in each candidate place and gradually decrease the APs until no more APs can be deleted, in each step we make fault tolerance checking. Our proposed method can effectively solve the problem of tolerating to access point failure in the design phase of wireless local area networks. Simulations are conducted to show the performance of our proposed method.
The Research of Topology Control in Wireless Sensor Network Based on the Monitoring of Transmission and Distribution Lines
Authors: Jia Hui Bin , Zhang Cai Xia
Published: November 2013

For the performance of wireless sensor network, topology control plays an important role. In order to save energy, prolong the lifetime of the network and reduce the interference between nodes, while ensuring the connectivity and reliability of data transmission, we propose a suitable scheme which is hierarchical topology control with distributed and a long-chain structure based on the monitoring of transmission and distribution lines. It is based on the study of the monitoring of transmission and distribution lines in wireless sensor network.This scheme will cluster with the deployed nodes, and fuse with data in the selected cluster head,in order to complete topology structure.To matlab optimization platform, using ant colony optimization algorithm to remove some redundant links, so that data transmit to the monitoring center reliably and complete real-time monitoring of the lines,thus prolong the lifetime of the network.
Design of Signal Generator Based on DDS Technology
Authors: Shao Yang Zhou , Zhang Hai , Ge Yue He
Published: November 2013

Traditional signal generators use analog oscillator circuit as the source, which often involve multiplication, integral and differential circuit. As this method required high electrical parameters of the system, and its complex circuit structure is vulnerable to outside interference. In this paper, a new technology named Direct Digital Synthesizer, DDS technology, was applied on a FPGA chip to design a waveform generator. It can generate periodic waveform, and its frequency, phase and amplitude were adjustable. Simultaneously, DDS technology has the function of frequency and phase adjustment, so no additional circuit was needed. During the amplitude modulation design, the characteristics of reference voltage of the D/A Converter are used. The theoretical and experimental results show that the combination of DDS technology and FPGA can well generate the periodic signal waveforms, while the hardware system fabricated has strong capability of anti-jamming.
Simulation of Temperature Compensation of Pressure Sensor Based on PCA and Improved BP Neural Network
Authors: Li Teng , Yang Shi Liang , Pan Hong Liang
Published: November 2013

Considering the effects of temperature on output of silicon pressure sensor, this paper proposed a novel method for analyzing temperature compensation of pressure sensor by using the combination of Principal Component Analysis (PCA) and improved BP neural networks. By using PCA to extract the prime information of temperature compensation, the multi-dimensional problem is simplified, the noise error data is eliminated, the neura1 network is improved and the fault-tolerance capability is enhanced. The results indicate that this method can restrain the effects of temperature on pressure sensors effectively and enhance their stability and accuracy.
The Temperature-Online-Measuring and Energy-Saving System for Drying Cylinder Based on Network Communication
Authors: Qian Chong , Wang Rong Rong , Wang Wei
Published: November 2013

During the process of drying fabrics by drying cylinder dryer, the over-drying of fabrics leads to a waste of energy. A temperature-online-measuring and energy-saving system for drying cylinder dryer based on network communication was designed in the study. The temperature-measuring and steam-controlling part of the system set in the cylinder dryer communicates with the remote monitoring part using the W5100 network chip through Ethernet which helps to achieve a high-speed and long-distance communication between the two parts. The remote monitoring part of the system is based on Delphi. The real-time temperature of fabrics in each drying cylinder can be displayed on the screen of the remote computer, and the steam supply of drying cylinders can be manually or automatically adjusted according to the mutations of temperature of fabrics by system administrators or the remote computer. The application of this system helps to avoid the The evaporation of water due to over-drying by 5.3%-6.6% and result in a reduction of the waste of energy by about 10%.
Research on Neutral Point Potential Balancing Algorithm of NPC Inverter Based on Redundant Voltage Space Vector
Authors: Ma Wen Zhong , Sun Tian Tian , Chen Ke Cheng , Jiang Li Li , Li Lin Huan
Published: November 2013

The imbalanced neutral point potential issue of the NPC inverter is analyzed in this paper. Based on the redundant voltage space vector control algorithm, a novel strategy by adjusting the working situation of positive and negative small vectors is proposed, which can suppress the neutral point potential imbalances effectively. The method is simulated with SIMULINK, and the control algorithm is implemented with the DSP of TMS3202812 in the laboratory. The simulation and experiments showed that the strategy is effective.
The Research and Design of Overhead Transmission Line Temperature Monitoring Technology Based on ZigBee
Authors: Wang Hong Liang , Cao Min , Wang Da Da , Li Peng , Zhang Shao Quan
Published: November 2013

Overhead transmission line temperature monitoring system for the protection of the safe operation of the transmission line is important, this paper introduces the ZigBee protocol level and the network topology, using the existing hardware platform designed and implemented programming ZigBee protocol stack, and then studied and designed based on ZigBee technologies overhead Transmission Lines temperature wireless data collection, gives the overall system architecture and hardware circuits, software systems, and do the experiment. After the unified information platform and experiment, the method is proved to be effective and feasible. The technology has high reliability, scalability, and low operating costs, especially for remote areas of Yunnan, China's high-voltage transmission line temperature monitoring.
Research of Anti-Multipath Interference Capability in Direct Sequence Spread Spectrum Communication System by Simulation
Authors: Zhang Ping Hua , Huang Xiu Liang , He Zhong Yue
Published: November 2013

The effects of multipath fading with time delay longer or shorter than one chip interval on DSSS system are mathematically and experimentally researched. Simulation results indicate that DSSS system can efficiently overcome multipath fading in multipath Rayleigh Fading channels. And the spreading gain is not the higher the better, it must be chosen reasonably.
Electromagnetic Vibration Test of Reactor with Inverter Power Supply
Authors: Jiang Ya Peng , Dong Wang , Chen Jun Quan
Published: November 2013

With the development of power electronics technology, PWM devices have been widely used. Non-sinusoidal power brings us serious vibration problem. In this paper, vibration acceleration measuring system is applied for detecting the vibration of reactor under SPWM modulated wave.
Design of the Let-Off Mechanism of Carbon Fiber Multilayer Diagonal Loom Based on Virtual Prototype Technology
Authors: Qin Jian Feng , Jiang Xiu Ming , Yang Jian Cheng , Wang Hua Qing , Yang Kai , Bai Yu , Hu Shuang Hu
Published: November 2013

This paper presents a set of the let-off mechanism of carbon fiber multilayer diagonal loom, which can accomplish thirty layer fabric weaving. This mechanism can realize multi-layer positive warp let-off and negative warp tension control and can meet different fabric structure and different types of warp weaving requirements. According to the requirement of the multi-layer weaving and the characteristics of carbon fiber, 3 d virtual prototype model of carbon fiber multilayer diagonal loom is established by applying the 3 d design software Solidworks and using the mechanical analysis software ANSYS analyses the mechanical properties of the key parts in different working conditions. Virtual prototype design ensures the rationality and reliability of the design of the whole machine.
Study and Comparison on Temperature-Frequency Characteristic of Integrated Quartz Resonator
Authors: Lan Bai Yang , Tian Wen Jie , Zhao Qing Jiang , Lv Yi Su
Published: November 2013

Combining the energy limit theory and the ANSYS finite element simulation analysis, this paper has designed the new integrated quartz crystal resonator and has used oscillator circuits to carry on the experimental comparison on its temperature-frequency characteristic in high-low temperature chamber. The experimental results show that the curve of its temperature-frequency characteristic is cubic in the coordinate system, which is basically consistent with that of the single electrode resonator. The frequency change of each resonator on the same substrate is basically the same when they are in the same circumstance and stimulation. According these similarities, this paper can implement differential processing on output frequencies of different resonators on the same substrate, which can effectively restrain the influence that temperature imposes on frequency.
Energy-Efficient Power Allocation for OFDM-Based Cognitive Radio Networks with Imperfect Spectrum Sensing
Authors: Zhang Er Qing , Yin Si Xing , Yin Liang , Li Shu Fang
Published: November 2013

With the rapid development of wireless network technologies and proliferation of related services such as multimedia applications, demands for wireless spectrum resources keep rising. Cognitive radio (CR) is a novel approach for better utilization of the scarce, already packed but highly underutilized radio spectrum. Meanwhile, exclusive functionalities such as spectrum sensing make energy efficiency (EE) a crucial issue in Cognitive Radios (CRs). In this paper, we focus on the energy-efficient power allocation for OFDM-based CRs with imperfect spectrum sensing. The EE maximization for secondary users (SUs) is formulated as a nonlinear fractional programming problem taking into account imperfect spectrum sensing such as miss detection and false alarm. Then by transforming the original problem into a parameter programming, the optimal power allocation is derived with the bisection search (BS) method and dual decomposition method (DDM). Simulation results illustrate the significant performance improvement of our scheme compared to an existing one with objective of maximizing system throughput rather than EE.
Propagation Delay Difference Estimation for Initial Random Access in LTE Compatible Mobile Satellite Communications System
Authors: Li Cheng Mei , Wu Jian Jun , Zhang Xiao Ning , Luan Xi , Xing Hai Ge
Published: November 2013

In this paper, a two-step propagation delay difference estimation method is proposed for LTE compatible multi-beam satellite systems to ensure the initial random access (RA). For GEO satellite system, there exists a large propagation delay difference, we cannot directly apply the LTE delay estimation method. To deal with this issue, we first divide a satellite beam into some layered small sub-areas according to the different delay difference values. Then, two types of Physical Random Access Channel (PRACH) preamble burst format are given. The detailed PRACH parameters are provided. Finally, simulations are performed and the results verify the availability of our proposed design.
Phase Distribution Analysis of Radiation Pattern of Multi-Beam Satellite Antenna Based on Offset Parabolic Reflector
Authors: Li Bin , Luo Yong , Tan Xu , Zhang Xiao Ning , Wu Jian Jun
Published: November 2013

This paper focuses on GEO multi-beam satellite offset parabolic reflector antenna. In this paper, radiation fields generated by different feeds are derived, and phase radiation pattern is mainly discussed. It can be seen from the numerical results that when the feed is at the focal point of parabolic reflector, the beam has equal phase within beam service area. In addition, for offset feeds, phase changes slowly from beam center to beam boundary, and the variation is about 0.1 radian.
Multiple Serial Communication Design Based on ADSP-BF561
Authors: Zhan Hua Lin , Lai Xiao Chun
Published: November 2013

This paper introduces asynchronous serial design and communication implementation by TI Co.,Ltd TL16C554 based on dual core processorADSP-BF561 and uClinux. This paper has accomplished multiple serial accessing using share interrupt scheme which has already been used in a wireless sense network.
Design of Frequency Synthesizer Based on DDS + PLL Technology
Authors: Wu Qing Ping , Kai Shen
Published: November 2013

This paper presents a design plan for the frequency synthesizer base on DDS and PLL of the digital receiver, the main hardware selection is shown. Finally through the system test, the results show that the frequency accuracy of the frequency synthesizer reaches 3.72×10-8, the resolution is 1Hz, the phase noise is 103dBc/Hz@1 kHz the clutter rejection is 67dB and the frequency conversion time reaches 9.6ms. This frequency synthesizer can produce low phase noise, high resolution and high stability of the broadband signal. It has excellent technical performance, has been widely used in engineering.
Based on 3G Communication Network 66kv Transmission Line Fault Location System Area
Authors: Zhang Yun Shan , Pei Yu Jie , Wang Qing Hao , Zhang Hua , Liu Chuan Bo , Cao Hui Yan
Published: November 2013

Fushun regional transmission line fault location system design and implementation is introduced in this paper by power Supply Company applying. It is based on 3G communication transmission line fault online monitoring system. In a few minutes after a failure, the type of fault and the fault of the specific position can be given quickly on monitor screen at the control center while the short message information is sent to the relevant personnel on the phone, so that maintenance personnel accurately and quickly rushed to the scene, troubleshooting. The work efficiency is improved and the outage time is shortening by the application of the system.
Research on Topology and its Performance of Grid-Connected Inverter for Direct-Driven Wind Power
Authors: Chen Rong
Published: November 2013

It is necessary that the grid-connected inverter was set up in wind power, in order to convey energy generated in wind power to the grid. There are many sorts of inverters, but only two sorts of inverters suit wind power system, which are current-source inverter and voltage-source inverter, and only the later is being widely used. Their configuration, principle, control and characteristic were analyzed in this paper. Results have shown that, voltage-source grid-connected inverter has been the core of the commutation control configuration of direct-driven wind power, which is decided by the peculiarity of itself.
The Extraction of Fault Feature Vector in Inverter Open Base on Matlab/Simulink
Authors: Yang Zhan She , Ma Xian Min
Published: November 2013

Fault is classified when the thyristor open in three phase bridge rectifier circuit in this paper,Circuit simulation model is established based on Matlab/Simulink,and for a variety of open circuit fault is simulinked,extracted all kinds of fault feature vector, provided the theory of mathematical basis for intelligent fault diagnosis.
Analysis of Inverter Energy Storage Welding Waveform Control
Authors: Ni Lei , Cheng Dong Hai , Li Qi
Published: November 2013

The inverter energy storage spot welding machine with wave control can weld initiating explosive device of aerospace system, and guarantee a stable and reliable welding quality by high frequency pulse current. Beginning with theoretical basis of inverter high frequency pulse current welding, the paper analyzes the given signal of inverter hardware, welding parameter and other experiment data to ensure the stability and safety of inverter energy storage spot waveform control.
Model Predictive Control of Circulating Fluidized Bed Coal Combustor
Authors: Li Shi , Hu Yan , Zong Xi Ju
Published: November 2013

This paper is concerns with the study of model predictive control of a circulating fluidized bed coal combustor. A nonlinear mechanical model is proposed based on a pilot plant and representative of the main combustion phenomena. The nonlinear model is linearized at the steady-state point, linear state-space model is obtained. Model predictive control (MPC) strategy is applied using linear model. Simulation results are presented and discussed.
Development of 1000V SiC JBS Diodes
Authors: Chen Gang , Wang Lin , Huang Run Hua , Liu Ao , Bai Song , Li Yun
Published: November 2013

High voltage 4H-SiC Ni Schottky junction barrier schottky (JBS) diode with breakdown voltage of 1000V and forward current of 1A has been fabricated. A low reverse leakage current below 4.7×10-6A/cm2 at the bias voltage of-1000V has been obtained. The forward on-state current was 1A at VF = 2.2V. The chip is 1.3mm×1.3mm. The turn-on voltage is about 1.4V. The on-state resistance is 14.5mΩ·cm2. The doping and thickness of the N-type drift layer and the device structure have been performed by numerical simulations. The SiC JBS devices have been fabricated and the processes were in detail. The die was assembled in a SMB package. The thickness of the N-epilayer is 10μm, and the doping concentration is 4×1015cm3. A floating guard rings edge termination have been used to improve the effectiveness of the edge termination technique. By using WTi/Au multilayer metal structure, the double side Au process of 4H-SiC JBS diode is formed. We use the PECVD SixNy/SiO2 as the passivation dielectric and a non photosensitive polyamide as the passivation in the end.
The Application of Capacitive Output Impedance of Inverter in Wind Farms
Authors: Guo Wei , Zhao Dong Mei
Published: November 2013

This paper studies about two parts :one is about principle and construction of the equivalent capacitive output impedance of inverter, the other is that through comparing different compensation strategy of the application of simulation experiment, and verify the effect of C-Inverter.1) In this paper we study the droop control characteristics of three types of inverters with inductive, resistive and capacitive equivalent output impedance respectively, and use the virtual impedance to get C-Inverter in wind power.2) This paper sets up SVC and STATCOM models and improved the converter which changes to capacitive inverter in DIgSLIENT, which are connected to wind power system, verifying the validity of SVC and STATCOM models and the effect of C-Inverter.
Modeling and Simulation of Smart Meters Based on Matlab/Simulink Software
Authors: Zhang Peng He , Xiao Cheng Dong , Xue Yang , Zhang Xin Lei
Published: November 2013

Nowadays, smart meters are widely used in power grid, which plays an important role in building the smart power grid and its stability is the key to stable operation of the grid. However, the reliability prediction of the smart meters is difficult to be performed due to its huge number and it cannot be tested one by one. In order to study the prediction method, according to the working principle of smart meters, this paper presents a simulation smart meter model based on Matlab/Simulink software. And related experiments are performed to measure the power consumption under different loads, through comparing the measured power consumption between the simulation model and power analyzer, the correctness of the presented model is verified.
Modeling and Simulation of Period Signal Generator Based on DDS Technology
Authors: Zhang Hai , Shao Yang Zhou , Ge Yue He
Published: November 2013

A new technology named Direct Digital Synthesizer, DDS technology, was applied on a FPGA chip to design a signal generator which can produce periodic waveforms, and its frequency, phase and amplitude were all adjustable. Since the DDS technology has the function of frequency and phase adjustment, no additional circuits are needed in design. The theoretical model was built and the programs for each module were well developed. Using Modelsim software, three signal waveforms were simulated corresponding to sine, triangle, and square signals. The theoretical and simulation results show that the combination of DDS technology and FPGA can generate arbitrary waveforms in theory, while the hardware system fabricated has strong capability of anti-jamming.
A Research on Stability Control for EMU Network Communication
Authors: Zhang Wei
Published: November 2013

Conventional communication control methods cannot solve the Doppler frequency shift problem in high-speed moving network communication of EMU. The shift phenomenon in signal propagation, the high error rate and the low transmission efficiency make it's unable to ensure the stability of the high-speed communication network. Therefore, the paper designs the control model accordance with fuzzy estimation and data communication error correction for stability control of EMU network communications. Experimental results show that under the method delay and bandwidth changes of EMU communication is relatively stable, which means that the method can achieve high efficiency, high precision control for EMU network communication, and with a high application value.
Simulation of Fault Detection in the Wireless Networked Control System
Authors: Guo Hong Liang , Kong Shao Ying
Published: November 2013

Wireless network control system is characterized by high uncertain delay time, thus the state of the system can not be fully observed. The fault characteristic is interfered by time delay so to be unstable, leading inaccurate fault detection. Traditional fault detection method of wireless network control system is usually based on the characteristics of the stability of the network status data. If the network has time delay fluctuations, it is unable to obtain accurate fault detection results. This paper presents a stochastic delay fault detection method. It builds a state space model of the system, analyzes the delay vector between the sensor end of the system and the controller end, depending on the delay residual signal of the system and the corresponding evaluation function to obtain the system failure detection result. The final simulation result shows that this method has high accuracy in the detection of Stability and randomness of the wireless network fault detection. Thus it is an effective wireless network control system fault detection method.
Application of Pressure Sensing System in Wastewater Treatment of Mining Industry
Authors: Liu Xiao Ye , Gong Wen Qi , Gui Guang , Liu Zhi Gang
Published: November 2013

Sensor technology is one of the most rapid development technologies in the world, we cant leave without it. The bioremediation of waste acidic water in mining industry are the hot topic in the world. It is our focus of this paper to measure the pressure in the reactor to obtain the growth status of sulfate reducing bacteria (SRB) using pressure sensor.
Application of Electromagnetic Shielding Technology in the Electronic System
Authors: Chen Guo Jun , Xu Jiang Min
Published: November 2013

With the wide application of electronic technology, electromagnetic interference has become one of the main factors to weaken electronic system performance. In communication technology and equipment, it is the development of light-duty design, low cost, high quality electronic components and electronic system that is the main object of this study. Radio frequency MEMS devices are low energy consumption, good stability. Therefore it has a strong competitiveness in the communications electronics. But EMI electromagnetic interference problem has increasingly become prominent, and based on this, this paper makes a further study on the main electromagnetic interference electromagnetic radiation of MEMS devices. In addition, this paper also establishes the mathematical model of electromagnetic radiation. Finally this paper makes an analysis and study on the shielding effect of MEMS antenna under certain magnetic materials. Through the simulation research, it is obtained that the electromagnetic effect of electronic system MEMS is good and its highest performance is more than 60 db. Whats more, shielding materials are within the range of 15 to 20 GHZ, whose shielding effects reach the maximum. The largest is close to 80 db.
Assessment Models and Rules of GNSS Interoperability
Authors: Wang Wei , Lv Cheng Cai , Li Xin
Published: November 2013

Global Navigation Satellite System (GNSS) interoperability could make use of the information from different navigation satellite systems. To estimate GNSS interoperability at the system level, an innovative assessment algorithm was presented in this paper. First of all, three assessment parameters, namely, Dilution Of Precision (DOP), Navigation Satellite System Precision (NSSP) and Navigation Satellite System Integrity (NSSI) were introduced. Secondly, availability and continuity of the assessment parameters were adopted to quantify the GNSS performance. A further step was then taken to focus on the assessment rule for GNSS performance by employing the weighted sum of availability and continuity. Simulation results demonstrate that GNSS performance could be improved significantly by interoperability.
A New Scheme of Designing Frequency Synthesizer with Low Output Stray
Authors: Ren Jie , Miao Jun Gang , Zhang Jin
Published: November 2013

In traditional frequency synthesizers, there is a frequency synthesis module for every output channel, so there is crosstalk between output channels. The more the output modules, the more is the crosstalk. Deeply researching shows that the crosstalk between output modules has most of the influence on output stray [2,. To improve the output stray, a new scheme of designing frequency synthesizer with low output stray is given in this paper. In the new scheme, there is only one frequency synthesis module for all outputs. The output of the module is divided into several outputs by the power divider. Then these outputs directly input to the output modules. In this way, the crosstalk between the frequency synthesis modules can be effectively avoided, and the output stray can be significantly reduced. On the other hand, the volume and the cost of the synthesizer is reduced. Simulation result shows that the new scheme can meet the requirements of low output stray.
Defect Imaging via Chirp Signal Excitation in Plate
Authors: Chen Hong Lei , Deng Fei , Zhang Xi
Published: November 2013

The chirp signal can bring some useful information for structural non-destructive evaluation (NDE) applications due to its broad frequency components with different sensitivity to defects that exist in test pieces. This paper introduces a defect imaging method based on the chirp signal. When a chirp signal is used as excitation in the guided wave detection system, tone burst results can be gotten from the response easily. Numerical simulation results show that this method simplifies the procedure to find the best exciting frequency and guided wave mode for the hole defect detection, and yields more accurate defect imaging results with arc imaging algorithm.
Research on Distribution Automation Technology Roadmap
Authors: Wang Peng , Lin Tao , Zhao Jiang He
Published: November 2013

Distribution automation, since the last century 90's in China, has accumulated a lot of technology and management experience. At present, distribution automation has been to the large-scale application stage. In order to ensure distribution automation economic and practical, this paper proposes distribution automation technical development route based on the analysis of several typical technologies, and supplies the specific technical principles. At the same time, this paper also points out the difficulties of distribution automation development, and puts forward some corresponding technical measures should be taken. This paper proposes the technology roadmap which has been taken by State Grid Corporation of China (SGCC), and has been used into the technology standard of SGCC.
Study of Coupling Factor for Wireless Power Link in Advanced Brain-Machine Interface
Authors: Wen Hua Xi , Gu Xian , Fang Dong , Ding De Dong , Yu Qiang , Wu Rong Xiang
Published: November 2013

The inductive wireless power transfer efficiency is determined by the coupling factor and coil quality factors. This paper studies the coupling factor of an inductive power link (IPL) for wireless power transfer in advanced brain-machine interface applications. By comparison to the experimental results, the various design tools including Maxwell simulation and two analytical models are evaluated for prediction of the coupling factor. The coupling factors of IPLs with different design parameters are also analyzed. The results show that for specific wireless power transfer distances, the coupling factor of an IPL is mainly related to the size and fill ratio of the coils, while is almost independent of the coil track pitch, coil width/pitch ratio, and track thickness.
Blind Images Separation Based on Sparse Independent Component Analysis
Authors: Wang Jing Hui , Zhao Yuan Chao , Chen Dong Sheng
Published: November 2013

In this paper, a novel sparse component multi-resolution independent component analysis is presented. This method separates mixed images based on quadratic function of sparse component coefficient. The quadratic function can be interpreted as the time-frequency function or time-scale function. The performance of the algorithm is evaluated by using noisy mixed images data. Experimental results show that the method is feasible.
Research on the Signal Encrypted by Unary Polynomial Transformation Chaos
Authors: Wu Ling , Chen Hong , Gu Shu Bin , Lin Lian Dong , Lan Guo Qiang
Published: November 2013

In terms of the chaotic signal needed by encryption, it is the more complicate the better. In addition, the frequency range of chaos should be wider than that of signal to be encrypted. However, chaotic spectrum usually is a narrow area in the low frequency region, and the complexity is not high enough. The signals encryption effects are affected. In order to solve this problem, this paper used the chaos transformed by unary polynomial to encrypt signals. Under the Matlab simulation environment, it is confirmed from time-domain and frequency-domain perspectives that the encryption effect of transformed chaos is better. Even the higher frequency signal can also be covered up completely. At the same time, the difficulty of decoding the encrypted signals is greatly increased, and the anti-attacking capability is strengthened.
Signal Acquisition and Processing in Hydraulic Components Test System
Authors: Zeng Xiao Teng
Published: November 2013

The key to the performance test system for hydraulic components is to realize real, fast and accurate signal acquisition and processing. By analysis the analog and digital signal processing during hydraulic components Performance testing, a new signal flow scheme is proposed. It described in detail the acquisition and processing method of serial signals and PLC signals, thus solving the lag and distortion during signal processing and realizing the real-time display of data and the automatic report of performance parameters during hydraulic components testing process.
Design of Laser Processing System of Five-Axis Motion Controller Based on DSP and FPGA
Authors: Huang Fu Qing , Lin Wei Peng , Liang Jia Chang
Published: November 2013

According to the characteristics and requests of laser-processing system, DSP chip TMS320F28335, as main control chip, is used to compute processing data and to realize interpolation algorithm. In order to meet the real-time requirements of laser-processing system, FIFO in FPGA chip EP2C8Q208C8N, as assistance, is used to buffer the processing information. At last, we have completed the design of a controller with five-axis coordinated motion and realized the real-time status monitoring of this system.
Application Research of Data Mining Technology on Growth Management of Forestry
Authors: Zhang Wen Qing
Published: November 2013

A large number of data have been accumulated in our country during the long-term investigation and statistics of forestry resources, and it has become key problem to find out the relationship of the environment and forest growth from the large number of existing forestry resources data. In this paper, the data mining technology is used in planning and design of forestry resource, and the process of data mining is studied, considering data mining and design process of forestry resource decision, we firstly study data mining technology, then collect the data and perform data processing, select the algorithm of data mining, and establish Bayesian evaluation model, then explain and analyze the decision analysis of forestry results. Practice has proved that data mining methods have improved the accuracy and reliability of decision making of forestry management, and provided new theory, methods and technology for research of growth management of forestry.
Effect of Silane Treated and Untreated Talc on the Properties of Thermoplastic Polyurethane/Polypropylene Blends
Authors: Bajsić Emi Govorčin , Veljko Filipan , Bulatović Vesna Ocelić
Published: November 2013

The effect of the silane treated talc on the mechanical and thermal properties of talc filled thermoplastic polyurethane/polypropylene blends (TPU/PP blends) was investigated. Thermoplastic polyurethane and polypropylene are partially miscible due to the lack of interfacial interaction between the nonpolar crystalline PP and polar TPU. Blends of TPU and PP with silane treated and untreated-talc were prepared using melt blending in a laboratory twin-screw extruder. Organosilane (3-glycidoxypropyl-trimetoxy silane coupling agent) was used to treat talc in order to improve the affinity between the filler and the TPU/PP blends. Dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC) and mechanical (tensile test) measurements were used to characterize the talc filled and silane treated talc filled composites and TPU/PP/talc blends. The addition of silane treated and untreated talc in TPU/PP blends improved miscibility in all investigated TPU/PP/talc blends. The silane treatment increases the storage modulus in all investigated TPU/PP/talc blends in comparison with that of the untreated TPU/PP/talc blends. The obtained DSC results show that the addition of silane treated talc increases the degree of crystallinity (χc) of TPU/PP/talc blends because of the improved adhesion between the polymer and the treated talc. Addition of silane treated talc improved the mechanical properties as compared to TPU/PP/talc blends without chemical modification of talc. The results of strength correlate to the values of the storage modulus and crystallinity of the investigated TPU/PP/talc blends.
Influence Factors of Landfill Leachate Treatment with CWAO Method
Authors: Wang Qing Yu , Chen Wei Li , Lin Jin Bing
Published: November 2013

Landfill Leachate is a kind of organic wastewater with high concentration and non-biochemical character, and Catalytic Wet Air Oxidation (CWAO) is suitable for this kind of wastewater treatment. In this study, Landfill leachate was treated with Catalytic Wet Air Oxidation (CWAO) method. The monitoring indicators consist of CODCr, absorbance, pH and chroma. The results show that: CODCr removal rate and decolorization rate of landfill leachate reduce with the reduction of the influent pH, the increment of water concentration and the extension of the reaction time; Under the optimized operating conditions: the influent pH of 8.10, the influent CODCr of 16611 mg/L, the reaction time of 90 min, the CODCr removal rate and decolorization rate of landfill leachate reach 56.8% and 83.7%, respectively. The effluent pH is 8.33 and chroma is 1600 times.
Characterization and Process Optimization of Transition Metal Compound Catalyst in CWAO Applications
Authors: Li Ping , Zhang Yong Li , Lin Jin Bing
Published: November 2013

On simulated organic wastewater treatment by catalytic wet oxidation (CWAO) experiments, the transition metal compound Cu-Fe-La/FSC catalysts were characterized by SEM, TEM and FT-IR, and its application in CWAO reaction process conditions were optimized. Catalyst characterization experiments show that the active components on the surface of the Cu-Fe-La/FSC uniformly distribute, and the particle size is 10 to 50 nm; the chemical composition of-OH-and-Al-O-key are remarkable. To optimize the operation process with the orthogonal experiments of catalytic wet air oxidation (CWAO), the results show that in the five factors of influencing CODCr removal rates of wastewater, they are arranged according to the influences on water treatment from high to low: catalyst dose, system total pressure, influent concentration, reaction temperature, reaction time. The optimized operating conditions: catalyst dose of 8 g/L, total system pressure of 2.0 MPa, influent concentration of 3000 mg/L, reaction temperature of 180 °C¡æ, reaction time of 60 min. Under the optimized operating conditions, the CODCr removal rate of simulated wastewater reached 77.9%.
Reduction of Hexavalent Chromium in Water Using Iron-Aluminum Bimetallic Particles
Authors: Chen Shin Shian , Huang Yi Chu , Chen Tai Yu
Published: November 2013

Metal finishing wastewater containing chromium was conventionally treated by chemical precipitation and ion exchange techniques. Zero-valent metals such as iron, aluminum, zinc that possess high reduction potentials are frequently employed to remediate and process the contaminated groundwater. Iron-aluminum bimetallic metal (Fe-Al) is developed to improve the reduction capacity of Fe, Al is regarded as the electron supplier to prevent the precipitates formed on the surface of Fe. The aim of this research is to study the performance of Fe-Al on the reduction of hexavalent chromium ion (Cr6+) in water under several operation parameters including initial pH value, dosage of Fe-Al to Cr6+ ratio (Fe-Al/Cr+6), and Fe contents of Fe-Al particles. The results indicated that the sizes and specific surface area of Fe-Al particles increased with higher Fe content. The metal species on the surface of Fe-Al particles were identified by an x-ray diffraction spectrometer (XRD). Reduction of Cr6+ with Fe-Al particles consumes the H+ in water resulting in the increase of pH value with the reaction time. The study showed that the reduction potentials of Fe-Al on Cr6+ are promoted under acidic state and with higher dosage of Fe-Al/Cr+6.
Physical Properties of Woven Fabric from Paper Mulberry Yarn
Authors: Chonsakorn Sakorn , Piromthamsiri Kajijarus , Sirikasemlert Chanchai
Published: November 2013

This research were examined the characteristics chemical and physicalof paper mulberry fiber and also developed the spinning processes of paper mulberry yarn to make the fabric by weaving and knitting. The chemical composition of paper mulberry fiber was approximately 72.5% cellulose, while hemi-cellulose, lignin, pectin, and water-soluble were 17, 2.6, 2.3, and 5.6%, respectively. The characteristics and physical properties of paper mulberry fabric were also investigated.
Current State of Gas Resource Utilization and Countermeasures of Energy Saving for Integrated Iron and Steel Works in China
Authors: Qiao Zhe , She Xue Feng , Wang Jing Song , Xue Qing Guo
Published: November 2013

Gas is an important secondary energy in integrated iron and steel works. In this paper we proposed the reasons for low gas utilization by analyzing the characteristics and recycling situation of gas resource. One is the relatively backward idea, the other is that the ways and means of optimizing gas utilization are also backward, then we come up with the countermeasures to improve gas resource utilization. First of all we should promote energy conservation of enterprise system, optimize comprehensive utilization of gas and improve the energy structure. Second is putting more investment in new technology development and take active use of new technology and new process, such as high temperature air combustion technology, combined cycle power plant technology, enriched technology of blast furnace gas and so on. Last is developing gas deep processing to promote co-products of steel and chemical industry. The high added-value chemical products can be obtained by technologies such as production of hydrogen and methyl alcohol with coke oven gas, synthesis of methanol and dimethyl ether with converter gas and so on.
Direct Smelting of Chromite and Laterite Ores with Carbon under Argon Atmosphere
Authors: Yape Erlinda O. , Anacleto Nathaniel M.
Published: November 2013

Chromite and laterite ores from local sources were smelted in a vertical tube furnace with activated carbon as reducing agent at 1400°C to 1550°C using graphite crucible under argon atmosphere. It is shown that the grade and composition of the ore are the main factors determining the feasibility of smelting a mixture of chromite and laterite ores to produce a Fe-Ni-Cr crude alloy. The high recovery of iron and nickel in the alloy indicates the highly reducing condition prevailing in the smelting reduction experiments. It is also shown that the solubility of Ni in the slag increases with Ni concentration in the alloy and the FeO concentration in the slag. The chromium content of the slag increases with increasing iron content of the slag.
Materials for Extension Low-Income Housing: The Case of Bang Bua Community in Bangkok, Thailand
Authors: Tonmitr Nayatat
Published: November 2013

Housing for the poor in Thailand in a period of a decade, Baan Mankong Programme (BMP) has been largely focused. This paper focuses on an architectural engineering point of view to explore the housing phenomena with its conversion as well as the usage of extension materials. Extension materials are clarified and made categorizations to unveil the trends of practical urban poor housing case, Bang Bua community in Bangkok, Thailand. Two types of extension were apparent which roof and wall extensions are. The imperative factors to be determined for the extension materials consist of easiness of affordability, easiness of installation, materials cost, durability of usage as well as social situation; safety for instance.
Simulation and Numerical Homogenization of Magneto - Rheological Fluids Using the Molecular Dynamic Technique
Authors: Barski Marek , Pająk Piotr
Published: November 2013

The present paper is devoted to computational simulations of magneto - rheological fluids behavior subjected to external magnetic fields. In order to perform these simulations the modified molecular dynamic algorithm is adopted. The theoretical model of the magneto - rheological fluid in micro scale as well as the basic interactions between the ferromagnetic particles is discussed. Moreover, the classical molecular dynamic algorithm and its necessary modifications are also described. The proposed approach makes possible to study the process of the internal structure (constructed from the ferromagnetic particles) formation under external magnetic field. The obtained results in the form of the particle distribution in the representative volume can be further used in order to evaluate the mechanical or physical properties of the fluid in macro scale, for example magnetic permeability, heat conduction, etc.
EDS (Energy Sipersive Spectrometer) Analysis of Sintered Construction Material
Authors: Zhang Hai Ying , Li Shu Zhen
Published: November 2013

This study aims to analyze elementary variation of fly ash from one Shanghai municipal solid waste incineration (MSWI) plant using EDS (Energy Sipersive Spectrometer) as a function of sintering temperature. MSWI fly ash was firstly sintered at 700°C, 800°C, 900°C, 1,000°C and 1,100°C respectively for 30 minutes, and then underwent EDS analysis. It was found that element content follows the decreasing sequence of Cl > Ca > O > K > Na > S > Fe > Cu > Si > Al > Zn >Mg. Content of Ca and O rose with increase of temperature, while Cl has a relatively reverse trend. Fly ash sintered at temperatures over 1000°C sees a sharp decrease of Cl, K, Na and S, and a considerable increase of Ca and O. Therefore, sintering temperatures over 1000°C is recommended for treatment of municipal solid waste fly ash.
Study on Thermal Stability and Aging Resistance of High Hardness Polyurethane Elastomer via Thermal Analysis
Authors: Ma Rong Yao , Yi Yu Hua
Published: November 2013

In this study, the role of chemical soft segment (SS) constructions in thermal and mechanical properties of the elastomers has been investigated by choosing two types of polyol, a polyester and a polyether. Also the effect of the hard segment (HS) chemical construction has been studied. The result showed that compared with polyether based PUs, polyester based PUs have better thermal stability under nitrogen atmosphere. However, the difference for the aging resistance performance of PUs based on polyester and polyether is not obvious without oxidation impact.
Characterization of Microstructure of FA Ceramic Brick Using SEM
Authors: Zhang Hai Ying , He Hui Hong
Published: November 2013

In this work, MSWI (municipal solid waste incineration) fly ash is used to make FA ceramic brick, together with clay, fried clay and limestone. Microstructure of the product as a function of sintering temperature was studied using SEM (Scanning Electron Microscope). It was found that microstructure is strengthened with the increase of temperature, and porosity reduced. In addition, content of glass phases increase and particles are more closely cemented together as sintering temperature increases from 900 to 1050°C, which is conducive to solidification of heavy metals in the body.