bluuebunny/crossref_metadata_2025 huggingface dataset:
Exergetic and Parametric Study of a Solar Aided Coal-Fired Power Plant
Authors: Zhai Rongrong , Zhu Yong , Yang Yongping , Tan Kaiyu , Hu Eric
Published: March 2013

A solar-aided coal-fired power plant realizes the integration of a fossil fuel (coal or gas) and clean energy (solar). In this paper, a conventional 600 MW coal-fired power plant and a 600 MW solar-aided coal-fired power plant have been taken as the study case to understand the merits of solar-aided power generation (SAPG) technology. The plants in the case study have been analyzed by using the First and Second Laws of Thermodynamics principles. The solar irradiation and load ratio have been considered in the analysis. We conclude that if the solar irradiation was 925 W/m2 and load ratio of the SAPG plant was 100%, the exergy efficiency would be 44.54% and the energy efficiency of the plant (46.35%). It was found that in the SAPG plant the largest exergy loss was from the boiler, which accounted for about 76.74% of the total loss. When the load ratio of the unit remains at 100%, and the solar irradiation varies from 500 W/m2 to 1,100 W/m2, the coal savings would be in the range of 8.6 g/kWh to 15.8 g/kWh. If the solar irradiation were kept at 925 W/m2 while the load ratio of the plant changed from 30% to 100%, the coal savings could be in the range of 11.99 g/kWh to 13.75 g/kWh.
A Novel Pumped Hydro Combined with Compressed Air Energy Storage System
Authors: Wang Huanran , Wang Liqin , Wang Xinbing , Yao Erren
Published: March 2013

A novel pumped hydro combined with compressed air energy storage (PHCA) system is proposed in this paper to resolve the problems of bulk energy storage in the wind power generation industry over an area in China, which is characterised by drought and water shortages. Thermodynamic analysis of the energy storage system, which focuses on the pre-set pressure, storage volume capacity, water air volume ratio, pump performance, and water turbine performance of the storage system, is also presented. This paper discovers how such parameters affect the performance of the whole system. The ideal performance of this novel system has the following advantages: a simple, highly effective and low cost structure, which is comparable to the efficiency of a traditional pumped hydro storage system. Research results show a great solution to the current storage constraints encountered in the development of the wind power industry in China, which have been widely recognised as a bottleneck in the wind energy storage industry.
Role of Thermal Process on Self-Assembled Structures of 4'-([2,2':6',2''-Terpyridin]-4'-Yl)-[1,1'-Biphenyl]-4-Carboxylic Acid on Au(III)
Authors: Liu Xiaoqing , Wang Yongli , Song Xin , Chen Feng , Ouyang Hongping , Zhang Xueao , Cai Yingxiang , Liu Xiaoming , Wang Li
Published: March 2013

The role of dynamic processes on self-assembled structures of 4'-([2,2':6', 2''-terpyridin]-4'-yl)-[1,1'-biphenyl]-4-carboxylic acid (l) molecules on Au(III) has been studied by scanning tunneling microscopy. The as-deposited monolayer is closed-packed and periodic in a short-range due to dipole forces. A thermal annealing process at 110 degrees drives such disordered monolayer into ordered chain-like structures, determined by the combination of the dipole forces and hydrogen bonding. Further annealing at 130 degrees turns the whole monolayer into a bowknot-like structure in which hydrogen bonding plays the dominant role in the formation of assembled structures. Such dependence of an assembled structure on the process demonstrates that an assembled structure can be regulated and controlled not only by the molecular structure but also by the thermal process to form the assembled structure.
The Toxicological Assessment of Cyclopentyl Methyl Ether (CPME) as a Green Solvent
Authors: Watanabe Kiyoshi
Published: March 2013

Cyclopentyl methyl ether (CPME) has been used in chemical synthesis as an alternative to hazardous solvents. According to some earlier investigation by others, CPME has low acute or subchronic toxicity with moderate irritation and negative mutagenicity and negative skin sensitization (Local Lymph Node Assay). Calculated Permitted Daily Exposure (PDE) value of CPME obtained by our 28-day oral toxicity test is 1.5 mg/day, and CPME is thus assumed to be a class 2 equivalent solvent in the ICH (International Conference on Harmonization) Harmonized Tripartite Guideline Q3C (R5). Wide synthetic utility and a detailed toxicity study suggest CPME as a green and sustainable solvent of choice for modern chemical transformations.
Noninvasive Vascular Displacement Estimation for Relative Elastic Modulus Reconstruction in Transversal Imaging Planes
Authors: Hansen Hendrik , Richards Michael , Doyley Marvin , Korte Chris
Published: March 2013

Atherosclerotic plaque rupture can initiate stroke or myocardial infarction. Lipid-rich plaques with thin fibrous caps have a higher risk to rupture than fibrotic plaques. Elastic moduli differ for lipid-rich and fibrous tissue and can be reconstructed using tissue displacements estimated from intravascular ultrasound radiofrequency (RF) data acquisitions. This study investigated if modulus reconstruction is possible for noninvasive RF acquisitions of vessels in transverse imaging planes using an iterative 2D cross-correlation based displacement estimation algorithm. Furthermore, since it is known that displacements can be improved by compounding of displacements estimated at various beam steering angles, we compared the performance of the modulus reconstruction with and without compounding. For the comparison, simulated and experimental RF data were generated of various vessel-mimicking phantoms. Reconstruction errors were less than 10%, which seems adequate for distinguishing lipid-rich from fibrous tissue. Compounding outperformed single-angle reconstruction: the interquartile range of the reconstructed moduli for the various homogeneous phantom layers was approximately two times smaller. Additionally, the estimated lateral displacements were a factor of 2–3 better matched to the displacements corresponding to the reconstructed modulus distribution. Thus, noninvasive elastic modulus reconstruction is possible for transverse vessel cross sections using this cross-correlation method and is more accurate with compounding.
Fecal Coliform and E. coli Concentrations in Effluent-Dominated Streams of the Upper Santa Cruz Watershed
Authors: Sanders Emily , Yuan Yongping , Pitchford Ann
Published: March 2013

This study assesses the water quality of the Upper Santa Cruz Watershed in southern Arizona in terms of fecal coliform and Escherichia coli (E. coli) bacteria concentrations discharged as treated effluent and from nonpoint sources into the Santa Cruz River and surrounding tributaries. The objectives were to (1) assess the water quality in the Upper Santa Cruz Watershed in terms of fecal coliform and E. coli by comparing the available data to the water quality criteria established by Arizona, (2) to provide insights into fecal indicator bacteria (FIB) response to the hydrology of the watershed and (3) to identify if point sources or nonpoint sources are the major contributors of FIB in the stream. Assessment of the available wastewater treatment plant treated effluent data and in-stream sampling data indicate that water quality criteria for E. coli and fecal coliform in recreational waters are exceeded at all locations of the Santa Cruz River. For the wastewater discharge, 13%–15% of sample concentrations exceeded the 800 colony forming units (cfu) per 100 mL sample maximum for fecal coliform and 29% of samples exceeded the full body contact standard of 235 cfu/100 mL established for E. coli; while for the in-stream grab samples, 16%–34% of sample concentrations exceeded the 800 cfu/100 mL sample maximum for fecal coliforms and 34%–75% of samples exceeded the full body contact standard of 235 cfu/100 mL established for E. coli. Elevated fecal coliform and E. coli concentrations were positively correlated with periods of increased streamflow from rainfall. FIB concentrations observed in-stream are significantly greater (p-value < 0.0002) than wastewater treatment plants effluent concentrations; therefore, water quality managers should focus on nonpoint sources to reduce overall fecal indicator loads. Findings indicate that fecal coliform and E. coli concentrations are highly variable, especially along urban streams and generally increase with streamflow and precipitation events. Occurrences of peaks in FIB concentrations during baseflow conditions indicate that further assessment of ecological factors such as interaction with sediment, regrowth, and source tracking are important to watershed management.
Sport, race, et politique : Taboo et la réception du discours sur les aptitudes athlétiques des races aux États-Unis
Authors: Martin-Breteau Nicolas
Published: March 2013

Cet article entend explorer la réception et la controverse autour de la publication aux États-Unis de l’ouvrage de Jon Entine, Taboo . D’après ce livre, les races humaines seraient différentes du point de vue athlétique car elles seraient « naturellement » inégales en termes d’« aptitudes » physiques. L’étude de la réception très contrastée de l’ouvrage, allant du soutien enthousiaste au rejet total, permet de mettre en valeur la permanence de la question des différences raciales aux États-Unis et pose le problème de l’utilisation de la science pour la promotion de buts politiques et de la liberté d’expression dans le champ académique. Cette étude permet aussi d’appréhender l’intérêt plus que jamais vivace dans le grand public pour les implications sociales et politiques supposées des résultats de la recherche génétique. Elle permet enfin de prendre la mesure des défis posés aux sciences de la nature et aux sciences sociales, notamment dans la délimitation de leur champ d’expertise académique.
INTERNAL FIXATION OF RADIAL HEAD FRACTURES WITH AN INTRAMEDULLARY NAIL
Authors: Krkovic Matija , Brojan Miha , Bombac David , Hermann Dejan
Published: March 2013

Comminuted fractures of the radial head still present significant technical and surgical challenges. In this article, we describe a novel fixation of comminuted radial head fractures with the help of an intramedullary nail. Experiments with solid, conventionally machined intramedullary nails showed some major drawbacks in the fixation of radial head fractures. Several design and manufacturing procedures were proposed. The general idea behind the new design was the concept of a nail which would eliminate the need for prefabricated bores. Experiments with a selective laser sintered thin-walled nail, designed with the help of CT images, fulfilled expectations. This thin-walled proximal radius nail thus offers a stable fixation of the radial head fracture fragments, with the ability to preserve the existing vascular supply to the radial head fragments, and therefore not just use the reconstructed radial head as a bioprosthesis.
Use of Engine Waste Heat Energy Utilization Rate of Engine is Improved
Authors: Jun Feng Liang , Bin Feng Guo
Published: March 2013

Based on the fuel price rises ceaselessly, energy-saving technology has been paid more and more attention by people. In order to improve engine energy utilization ratio and save energy, this article research how to use the engine waste heat to generate electricity and warm oneself.
Study on Technology Innovation Process Integration Based on Technological Growth Curve
Authors: Wang Yan Qiu , Hu Nai Lian , Li Li Ping
Published: March 2013

To find the effective technological innovation management mode in the whole technological process of the enterprises, this paper made a comparative study on the concepts, models and characters of continuous and discontinuous innovation, and provided an important criterion to define continuous and discontinuous innovation whether the technological trajectory and technological paradigm are the same. According to the technological growth curve, the process of technological innovation is divided into the growth phase, plateau phase and transitional phase, then the paper proposed that the enterprises should adopt innovation combination, conduct continuous and discontinuous innovation management activities during technological growth and technology alternation, and the author built the manage model of the continuous and discontinuous innovation based on technological growth.
Analysis of Helicopter Main Reducer Planetary Gear Contact Strength
Authors: Liu Peng , Li Ying Ming , Huang Kang , Chen Qi
Published: March 2013

Theoretical method and the finite element method for a helicopter main reduction gear of the planetary gear train are done this article. The contrast drawn: the reliability and accuracy of the finite element simulation method used in the calculation of tooth surface contact stress. Provides an effective approach for accurate analysis of helicopter main reduction planetary gear contact stress.
Single Spur Gear Reducer Optimization Design Mathematical Modeling
Authors: Wang Yu Xia
Published: March 2013

In a given power P, number of teeth than u, input speed and other technical conditions and requirements, find out a set of used a economic and technical indexes reach the optimal design parameters, realize the optimization design of the reducer, This paper determined unipolar standard spur gear reducer design optimization of the design variables, and then determine the objective function, determining constraint function, so as to establish the mathematical model.
The Research of Balance Suspension Failure Form
Authors: Zhang Hong Bao
Published: March 2013

Each part of Balance suspension are likely to become invalid in actual using, the reason is in the process of actual use it often severs overloading phenomenon, to lead the balance suspension shaft fractured, bushing early wearing and failure forms etc. According to this phenomenon, this paper analysis each failure forms of parts, then create model of CAE to analysis, and compare with actual failure forms, at last put forward the corresponding measures.
The Application of Hybridized DC-DC Converters in the Power Supply System of Spacecraft
Authors: Qing Nan , Wang Wei Guo
Published: March 2013

DC-DC converters are widely used in the power supply system of spacecraft. This paper introduces the application of hybridized dc-dc converter and its advantages, and the radiation effects in space environment. The hybrid packaging technology is briefly presented. Finally, the future development is proposed.
Global Robust Terminal Sliding Mode Control for PMLSM Servo System
Authors: Han Hong Pei , Wang Wu , Bai Zheng Min
Published: March 2013

Permanent Magnet Linear Synchronous Motor (P MLSM was hard to control with traditional control strategy for parameters variation and external load disturbance, a global robust terminal sliding mode control (GRTSMC) was designed for PMLSM servo system, the sliding mode surface function was designed, the robust sliding mode control law was deduced and the stability was proved by Lyapunov theory. With the mathematical models of PMLSM, the simulation was taken with traditional PID control, SMC control and GRTSMC control proposed in this paper, the robust performance be found with GRTSMC control when motor parameters and external load changed, the efficiency and advantages of this robust control strategy was successfully demonstrated.
Design of Skid-Mounted LCNG Fueling Station for Vehicle
Authors: Yang Jin Xian , Li Xing Jie
Published: March 2013

More and more LCNG fueling stations being built in several cities of China, it brings some problems on safety ensuring, rapidly constructing, cost saving, stable controlling, convenient moving. According to the requirements of the technological process, a kind of skid-mounted LCNG (Liquefied Compressed Natural Gas-engines) fueling station is designed. The station integrates those main equipments, such as LNG cryogenic pump, LNG vaporizer, and electrical control cabinet. Using a touch screen with a PLC in the electrical control cabinet, and it is an easy and less cost way to discharging the field controlling. The control system structure and the software are also designed for stable controlling. Compared to traditional CNG fueling station, it can be less land consumption, low construction cost, easily moving, and the skid-mounted LCNG fueling station has very wide application foreground.
Medium Voltage Distribution Network Voltage Grade Sequence Comprehensive Evaluation Based on Gray/Ahp
Authors: Ma Xing He , Yan Bing Yao , Wang Yong Sheng
Published: March 2013

Analyze our country medium voltage distribution network voltage grade sequence current situation, consider technological factors, economic factors and equipment factors, establish voltage grade sequence analysis model, through the grey /ahp, evaluation analysis model. Finally, Given the typical regional network model, the grey/ahp analyses. Example showes, the method is helpful for regional power grid voltage grade the qualitative and quantitative evaluation.
Calculation of 3D Airgap Magnetic Field Distribution of an Axial Flux Permanent Magnet Motor
Authors: Shangguan Xuan Feng , Zhang Kai
Published: March 2013

With the slice tool in finite element software Magnet, 3D magnetic field distribution in airgap of an axial flux permanent magnet motor (AFPMM) is studied. Then analytical method, finite element method and average radius method are used to calculate the airgap magnetic flux of per pole respectively. The results which are gotten through these methods are approximate and can reflect per pole magnetic flux of AFPMM generally. The above research has achieved anticipated effect and provided a basis for the calculation of AFPMM airgap magnetic field.
Research on Multi-Segment and Multi-Class Seat Inventory Control with Overbooking
Authors: Wang Di , Liu Chang You
Published: March 2013

In order to achieve a real-time control method and technical support for airlines, the integrated modeling issue of airlines about seat inventory control and overbooking has been researched in this paper. And the integrated control static model has been established by the stochastic programming method, based on ticket sales process to be simulated as a queue process and profit maximization to be objective function. So the problem is decomposed into a plurality of single-segment and single-class seat inventory control problem. Furthermore, the optimal decision-making equation of limiting reservation for each class has been deduced from the model. Finally, the validity of model and calculation method are shown by the full analysis of practical application of the model.
Design and Simulation of the New Three-Phase Voltage Source PWM Rectifier
Authors: Zhang Yi Ming , Zeng Zhi Hui , Yu Fei , Feng Jin Lan
Published: March 2013

Based on the principle of the three phase voltage source PWM rectifier, firstly, describes the topology of the three-phase VSR, and establishes the three-phase VSR’s mathematical model based on the three-phase stationary symmetric coordinate system (a,b,c) and two-phase synchronous rotating coordinate system (d,q); then analysis the three-phase VSR’s control strategy, and discusses the feedforward decoupling control strategy of the inner current loop, the outter voltage loop control strategy and the Space Vector PWM (SVPWM) control strategy. Secondly, builds a simulation model, simulates it in Matlab\Simulink environment.The simulation results show that the system has good current waveform of AC side current, high system stability, fast dynamic response speed, and can realize two-way flow of energy, energy feedback, and unit power factor control.
Research on How to Send Ladder Derived by Linear Electric Motors
Authors: Luo Yu Feng , Liu Yong
Published: March 2013

It is expected to raise the elevator at the same time more service efficiency, shorten the passenger ladder time and reasonable deployment of the purpose of the elevator. It puts forward a linear motor driven elevator car assigning algorithm. Combining with the characteristics of the linear motor, it use ALtera company's Cyclone Ⅱ series of EP2C5 chip, through the VHDL programming, has formulated the new structure of the elevator control strategy. This control strategy combining make good avoid mechanism, can realize the new elevator group control the lateral movement, and to better solve car collision between provides new way.
Simulation Research on Multisim10-Based Microcontroller
Authors: Tang Heng Juan
Published: March 2013

Simulation soft wares of Multisim10 computers serve as significant tool for electronic technology designing as well as instructing. Among them, MCU module can realize microcontroller simulation. Lightening process of LED lights controlled by microcontroller 8051 as well as programming and simulation of KS0066 LCD is conducted by taking advantage of MCU module of Multisim. Fundamental operation and simulation approach of MCU module in Multisim10 are introduced. Expected requirements are realized through circuit designing and program simulation as well.
Fault Diagnosis of Motor Rotor Based on Fuzzy C-Means Clustering Analysis
Authors: Cao Yu Xiang , Li Xue Jun , Jiang Ling Li
Published: March 2013

For the fuzziness of the fault symptoms in motor rotor, this paper proposes a fault diagnostic method which based on the time-domain statistical features and the fuzzy c-means clustering analysis (FCM). This method is to extract the characteristic features of time-domain signal via time-domain statistics and to import the extracted characteristic vector to classifier. And then the fuzzy c-means realizes the classification by confirming the distance among samples, which is based on the degree of membership between the sample and the clustering center. The fault diagnostic cases of motor rotor show that the method which bases on the time-domain statistical features-FCM can detect the rotor fault effectively and distinguish the different types of fault correctly. Therefore, it can be used as an important means of rotor fault identification.
Research of Calibration Instrument of Multi-Site Single-Phase Energy Meter
Authors: Hou Tao , Guo Yan Hong
Published: March 2013

This design is a full-featured, high precision power meter on-site calibration device and integrated electrical parameter measuring device. The internal use of SCM control, you can not open the instrument case, through the keys with precision adjustment, thus increasing the reliability and stability. This study projects able to keep the case of electricity meters for a variety of electrical power meter, indicating a variety of instrumentation and electrical power transmitters to provide on-site instruments detection, but also to voltage, current, power, power factor, phase, frequency and other electrical parameters measurement.
Study on the Geological Conditions of Uranium Mineralization in Guojiaping
Authors: Huang Yong Gui
Published: March 2013

Guojiaping is located in the middle of China's carbonaceous-siliceous-argillite uranium mineralization belt, and its areal position, lithofacies paleogeographic environment and mineralization geological conditions can give a good reflection to its better geological background of uranium mineralization. In this paper, through analysis and comparison on previous prospecting data used in Guojiaping as well as neighboring areas, the characteristics and geological conditions of the uranium mineralization are seriously studied with theory, new technology and new methods. Guojiaping owns an upper Sinian-lower Cambrian stratum, and thus contains rich uranium source, and especially lithological combination favorable for uranium mineralization exists in upper Sinian stratum. In the study area, it is found that a group of approximately parallel NE---NNE fracture structures with equal intervals develops, and also the output of industrial uranium ores is spatially controlled by it.
Based on Base Station Control Management Protocol in Heterogeneous Sensor Network
Authors: Liu Zhi Ping
Published: March 2013

Based on the characteristics of WSNs different from traditional networks, this thesis analyzes the heterogeneous sensor network. Based on state of the cluster head, the base station (BS) adjusts the routing table and transmission power of the cluster head to balance the node energy consumption. Extensive simulation experiments are performed and the results show that the proposed scheme has advantage in network lifetime and energy consumption.
High Security Design of 2.4GHz Remote Controller in Car Anti-Theft
Authors: Zhang Wen Yi , Niu Quan Ying , Shang Ming Zhe
Published: March 2013

The effectiveness of car anti-theft relies upon the security of signal from its remote control. However, the signal is easily captured and decrypted for common remote controller. In this paper, the dynamic encryption technology is adopted to enhance the security of signal transmission in the theft-against system. Two random numbers were invoked in the encryption technology. The data was double encrypted according to the two algorithms which were obtained by the two random numbers, respectively. So a same data corresponding to an instruction can be encrypted into a different data. The encrypted data were emitted by NRF24L01. The corresponding instruction was not implemented until the encrypted data were double decrypted by the alarm. The encryption technology can avoid the signal decrypted and coped by the special wireless equipment
Modeling of In-Body Propagation Characterization for 2.5/3.5 GHz Implantable Devices Applications
Authors: Wei Bao Lin , Yue Hong Wei , Zhou Qian , Xu Wei Lin , Wei Xue Ming , Duan Ji Hai
Published: March 2013

To investigate the propagate channel for implantable devices deep inside of a human body to receiver on-body or outside body, a 3D electromagnetic model of human body which including 85 kinds of different human tissues and organs, based on CT and MRI slices data take from living human males, was built. The in-body channel path gain in different distance for 2.5/3.5 GHz biomedical implants was investigated using electromagnetic (EM) simulator and its numerical sta-tistical model was presented. EM simulation and numerical computational results show that the dis-tance dependent path gain for inside body can be modeled by a modificatory classical power law function with root-mean-square error (RMSE) of 2.6 and 3.9 for 2.5 GHz and 3.5 GHz, respectively
Early Warning System of Power Grid’s Running Risk of Hebi Power Supply
Authors: Liu Si Qing
Published: March 2013

According to the searching inquiry of the grid of Hebi and other power supply units, analysis for the running of the “Regulations” management and grid safety is still in the manual judgment and analysis phase, including the percentage of users of power transmission equipment. Considering its long artificial combing cycle and low efficiency, it cannot achieve the prevention and early warning of electrical safety incidents, basically in the subsequent statistical analysis part. Through the investigation of the above analysis, in order to improve the power grid’s run the risk of the forecast and early warning capacity, it is necessary to be assisted by an automated technical means to increase grid security and the level of operational management.
Analysis in the Mercedes-Benz Automotive Fault Diagnosis
Authors: Wang Jin Ping
Published: March 2013

The analysis is a method to use the intrinsic link between things to reasonably infer the results of the unknown things, we can use Benz internal structure and the intrinsic link to analyze failure step by step to get an accurate diagnosis purpose, and the purpose of the paper is connecting the Mercedes-Benz automotive fault diagnostic to interpret the fault tree analysis and waveform analysis.
Application Study of Metal Magnetic Memory Testing in the Q345E Steel Weld Inspection
Authors: Zhang Peng Lin , Wang Wen Ke , Wang Yan Ping , Cao Li
Published: March 2013

Metal magnetic memory testing is a new nondestructive testing method and used to diagnose ferromagnetic components stress concentration. Welding defects and stress concentration has the close relation. This paper used metal magnetic memory in the weld inspection to study an effective weld magnetic memory testing method, at the same time to verify the results by X-ray inspection.
The Research of Effects on the Performance Parameters of the Quadrupole Mass Filter
Authors: Ma Ru Ping , Sun Chuan Qioang
Published: March 2013

As the main body of the inductively coupled plasma mass spectrometer (ICP-MS), quadrupole mass filter’s performance will largely affect the overall performance of the instrument. Its main performance parameters include the range of mass analysis resolution and the abundance sensitivity. In this article, we have analyzed simulated and then studied its several main performance parameters which affects the instrument.
Study on Robust Control Technology of Opto-Electronic Tracking System
Authors: Li Ming Qiu , Sun Rong Chun
Published: March 2013

Classic control algorithm can improve dynamic performance of opto-electronic tracking system, but the tracking system often has little robust performance. From the standpoint of inproving robust performance, modern robust control technology was adopted to design the controller of opto-electronic tracking system in this paper. On the basis of considering the system tracking precision requirement and main disturbance, the mathematical model of the system augmented objict was established. By repeatly testing, the suitable weighted functions were selected. Finally, the robust controller of opto-electronic tracking system was designed by synthesis method of modern robust control theory. The simulation result shows that the adjusting time of the system is 0.3S, and it can satisfy the requirements of the tracking speed. Robust controller has improved the system dynamic response characteristics and makes the system fast and no overshoot, and the opto-electronic tracking system has stronger robust stability and robust performance.
Parking Guidance Control System Based on Internet of Things
Authors: Sun Rong Chun , Piao Yan , Wang Yu , Wang Han
Published: March 2013

To help drivers to quickly find a spare parking, a parking guidance control system was proposed. The principle of ultrasonic ranging was used to detect the state of a parking space, and through the internet of things the parking detector transmits the real-time information to the control center. The control center mainly is an industrial computer and is responsible for dealing with the real-time information and sending the control command by internet of things. The guidance signs at each crossroad receive the wireless commands and execute them, by which the guidance function is performed. The internet of things was realized by ZigBee star network, in which the control center is a coordinator and other parts are routers or terminal equipments. The simulation experiment results show that the parking guidance system works well, and has the value of application and promotion to some extent.
Design of Three-Tank Liquid Level PID Control System Based on Virtual Instrument
Authors: Yu Yan Xin , Li Ming Qiu , Zhao Zeng Yang
Published: March 2013

On the basis of three-tank liquid level control system structure and the corresponding mathematical model, the simulation model of PID control system is established based on the Simulink environment. The control procedures are designed based on the platform of virtual instrument. Through the different setting parameters, we can achieve real-time monitoring and dynamic simulation of the entire control process. The test results are very close to the simulation results. The system can achieve the ideal control, and has the advantages of convenient operation, high intelligence, high precision and so on.
Design of Direct-Control Hydraulic Cylinder Speed Control System Base on High-Speed On-Off Valve
Authors: Gao Qin He , Liu Zhi Hao , Shao Ya Jun , Dong Ting Qiong
Published: March 2013

Application of high-speed on-off valve in the hydraulic speed control system was researched in this paper. The direct-control circuit application of high speed on-off valve is proposed to control the speed of hydraulic cylinder. The duty cycle of pulse control signal was changed according to the displacement of hydraulic cylinder to control the speed and weak the impact. The speed and accelerated speed curves of hydraulic cylinder were achieved by the means of simulation with Simulink and experiment with FESTO is obtained, and research result shows that the applied scheme can effectively control the speed of hydraulic cylinder effectively.
Model Validation Method for Simulation Experiment System of Complex Electromagnetic Environment
Authors: Huang Xing Dong , Shen Gong Xun , Wang Ke Dong
Published: March 2013

It is a challenging task to control an unmanned aerial vehicle (UAV) in complex electromagnetic environment. The effective anti-jamming simulation is an economical and efficient method to test and verify the control effect of an UAV. This paper introduces a method to construct an anti-jamming simulation system for an UAV firstly. Then, the procedure to validate the anti-jamming performance of an UAV is proposed. In the following, the evaluation methods in signal level and function level are described in detail for the model validation. The model effectiveness is evaluated both qualitatively and quantitatively. The simulation test results agree with the flight results very well.
Design of Parameter Adaptive Fuzzy Controller for the Planar Double Inverted Pendulum
Authors: Zhang Wei , Zhang Jiao Long
Published: March 2013

In this paper, The mathematical model is established using analytical dynamics method for planar double inverted pendulum, based on optimal control theory, parameter adaptive fuzzy controller is designed by use of variable fusion technology, thereby it can reduce the dimension of the input variables of the fuzzy controller, greatly decrease the number of the fuzzy rules, and the impact of the quantization factor on the control effectiveness is studied. The designed controller for system is applied in simulation experiments, the results show that the fuzzy controller can guarantee good control precision, fast response, control planar inverted pendulum stability.
Adaptive Error Concealment Technology Based on H.264 for Digital Satellite Set-Top Boxes
Authors: Tao Xiao Juan , Wang Ling
Published: March 2013

In order to improve the decoding performance of digital satellite set-top boxes, this paper proposed a directional boundary matching algorithm on temporal domain for H.264, it considers using the spatial smoothing of video images and the movement consistency in neighbor macro-blocks to restore the damaged macro-block, with pixels matching in three directions on the boundary. On this basis, a adaptive error concealment algorithm of multi-mode is proposed, which avoids the judgment of the partition mode of damaged macro-block. Experimental results show that when in the same case of packet loss, compared with the traditional concealment algorithms, the algorithm proposed in this paper has better performance in the improvement of PSNR and visual effect.
Research and Development of Fuel-Saving Technology of Automobile Gasoline Engine
Authors: Liu Bing Guo
Published: March 2013

Abstract: With the car into the family, for such a big developing country, how to effectively use and conserve resources, better adapt to the needs of the sustained, rapid and healthy development of the national economy, has become China’s key strategic issues. Currently, fuel-saving technologies in the use of vehicles have been a wide range of applications, and develop towards the trend of diversification.
Research on Filtered-XLMS Algorithm Based Adaptive Active Noise Control
Authors: Du Shuai , Lu Sen Lin
Published: March 2013

The core of adaptive active noise control system is the adaptive filter and the corresponding adaptive algorithm, the article described the principle of adaptive filtering for active noise control, focus on derivation of Filtered-XLMS algorithm, using MATLAB simulated and implemented Filtered-XLMS algorithm based adaptive active noise control system, and analyzed the filter length and the convergence factor on system performance.
A Study on Contractual Relationship Handle and Control in Constructional Engineering Disputes
Authors: Sheng Qing Jie
Published: March 2013

If the contracts signed by the construction enterprises with the relationship of affiliating operation under the name of themselves or titular enterprises, affiliating operators and titular units are usually co litigants to prosecute or response. It’s stipulated in Article of Supreme Court “Suggestions on Civil Procedure Law” that “if individual businesses, individual partnership or private enterprises affiliate themselves with collective enterprises and operate under the name of collective enterprises, the individual businesses, individual partnership or private enterprises and the titular collective enterprises shall be the co litigants.”Constructors are affiliated to other construction enterprises and sign construction contracts under the name of titular construction enterprises, but the titular construction enterprises don’t want to prosecute, the constructors can be plaintiffs, titular construction enterprises are not necessary to be regarded as co-plaintiffs.
Real-Time Prediction of Seepage Field during Tunnel Excavation
Authors: Wang Yuan , Jin Hua , Ouyang Li Jie
Published: March 2013

Selecting accurate hydraulic conductivity is critical to calculating correctly seepage field. Because of geotechnical hydraulic conductivity with spatial randomness and its errors in measurement and computation, the extended Kalman filter (EKF) is proposed to its back analysis. In conjunction with the finite element method (FEM) of seepage, details of the EKF are introduced in this paper. With FORTRAN programs, the hydraulic conductivity is revised according to the real-time monitoring data during tunnel excavation, and illustrates the EKF merits of considerable convergence and tolerable accuracy.
Temperature Field of Hydrostatic Supporting Disk in Different Viscosity and Rotational Speed
Authors: Zhang Yan Qin , Li Rui , Dai Chun Xi , Shao Jun Peng , Yang Xiao Dong , Sun Gui Tao
Published: March 2013

With heavy hydrostatic bearing as the research object, establish oil film viscosity-temperature equation. Adopt finite volume method, respectively calculates the oil film temperature field under different rotate velocity in Invariant viscosity and variable viscosity, revealing the oil film temperature arise influence rule of hydrostatic bearing on the viscosity and rotate velocity. The results show that the viscosity and rotate velocity have a great influence on the hydrostatic bearing oil film temperature rise, but the effect regularity varied. The calculated results that provide a theoretical basis for the hydrostatic bearing structure design and bearing deformation calculation, and have very important significance on improve the reliability and precision of the whole machine tools.
The Cutting Test Research of Cemented Carbide Face Milling Cutter
Authors: Hu Chun Ying , Ge Jiang Hua , Sui Xiu Lin , Zhang Ji Jun
Published: March 2013

According to the requirements of the machined workpiece and the actual cutting conditions, the four cemented carbide face milling cutters with equal pitch are selected, using orthogonal test method, the four factors are studyed ,including spindle speed ,feed per tooth ,axial depth of cutting,radial cutting width, and determining the optimal cutting parameters of the milling tool under the condition of different cutting parameters, to improve processing efficiency and surface quality.
Automobile Active Collision and Early Warning System Based on DSP
Authors: Li Mao Yue , Yang Liang Liang , Gao Biao , Yuan Zhi Jian
Published: March 2013

To solve the problem of automobile rear end collision, an early warning system is designed, which is based on DSP chip control. Ultrasonic ranging is selected in the system. By providing pulse trigger signals, internal modules will send out eight periodic levels with forty kHz, and detect echoes at the same time. Once the echo signal is detected, the reverberation signal will be output. Then the reverberation signal can be changed into actual distance in real time by interrupt mode. The result stands for the distance between the car and the obstacles, then corresponding braking measures and early warning will be decided according to the minimum safety distance. When it is dangerous, the car status can be controlled according to the setting logic state.
CFD Simulation of Installation Angle for Axial Flow Fan of a Motor
Authors: Tang Jia Dong , Lu Yi Ping , Sun Xue Mei , Zhang Wan Quan
Published: March 2013

To analyze the effect of the installation angle on the performance of axial flow fan, single blade model and whole model was established, steady flow in the axial flow fan of the 7500KW air-cooled motor was simulated by software FLUENT. Volume flow rate and hydraulic efficiency of the fan with different installation angle under specific outlet pressures were analyzed, the effect of different turbulence model on the numerical simulation results was discussed, and the effect of the single blade model, the whole model and lengthened flow passage model on the numerical calculation results was compared. The results show that the fan volume flow rate and hydraulic efficiency is higher with the installation angle of 30°, the results simulated by standard k-ε model are close to the results simulated by k-ω-SST model, calculation results of these three methods have a good agreement with each other, and the result coincides well with experimental measured values.
Gearbox Fault Diagnosis Research Based on Wavelet Transform
Authors: Yu G.B. , Zhao Y. , Nie J.F. , Dai B. , Song X.W.
Published: March 2013

The principle and application of wavelet analysis and gearbox fault diagnosis are described in the paper. To the experimental measurement of gearbox vibration signal, the time-domain and frequency-domain signals are got by wavelet transform. Then it get a clearly gearbox vibration signal by wavelet de-noising. The residual signal processing and three-dimensional wavelet analysis, it get the failure frequency and determine the fault characteristics. By the experimental signal wavelet transform, it reflects that the wavelet analysis method is better than traditional Fourier transform, so it is an effective method of fault diagnosis.
The Application of Universal Design in the Elderly Electric Scooters Design
Authors: Song Duan Shu
Published: March 2013

This paper investigated the status of the elderly population as well as the elderly market potential in china, and analyzed the importance of universal design on elderly electric scooters. We designed an elderly electric scooter under the guidance of universal design concept and ergonomics. Its wheelchair styling is a breakthrough which distinguishes it from the traditional electric scooter. The new scooter is safer, more fashionable and space-saving. We expect that the universal electric scooter can benefit the elderly and make the whole society concentrate on the old group.
Design of Deployment Mechanim of Steel Ball and Surface Defects Recognition
Authors: Zhao Yan Ling , Che Wan Bo , Zhou Kai , Xuan Jia Ping
Published: March 2013

At present, the steel ball surface defects are usually detected by manual work, but it has low efficiency and low reliability. For the current situation, in this paper, we design the steel ball deployment mechanism based on image processing technology, establish the mathematical model of the shooting point trajectory and determine the amount and location of the shooting points by the steel ball motion analysis. By the simulation based on Mathematica and Java, verify the effectiveness of the steel ball deployment mechanism in steel ball unfolding and defects recognition. Thus, the steel ball surface can be completely detected.
Maintenance Scheduling of Composite Generation and Transmission Systems Using Multi-Objective Evolutionary Optimization
Authors: Sang Hai Tao , Wang Guo Quan , Wu Yu Qu
Published: March 2013

Reducing the overall cost and improving the reliability are two primary but often conflicting objectives for composite generation and transmission system . Scheduling of appropriate preventive maintenance requires optimization among multiple objectives. In this paper, a systematic and integrated methodology with three functional blocks is proposed. In the first block, the stochastic deterioration process of individual components is formulated as a continuous-time Markov model, in which transition rates incorporate the influences of the aging of components and two (minor and major) maintenance extents. Reliability of a composite generation and transmission system is dependent upon its topology as well as its load and generation profiles, and is evaluated in the second block. In the third block, Pareto-based multi-objective evolutionary algorithm is proposed because of its proven ability to search towards the optimum among a large number of potential solutions for providing a holistic view of conflicting relationships among multiple objectives. The proposed approach is applied to the IEEE reliability test system (IEEE-RTS), and the reliability, maintenance and failure costs of the entire IEEE-RTS are optimized. The successful application to IEEE-RTS demonstrates its potential of handling complex systems.
Study on Fuzzy Control in Permanent Magnet Linear Synchronous Motor System
Authors: Zhang Chao , Zou Ying Yong , Wei Wei
Published: March 2013

The design introduces fuzzy control logic to improve the static and dynamic performance of permanent magnet linear synchronous motor direct thrust control system and carries out reasonable fuzzy classification to the three variables of flux linkage error of primary promoter, electromagnetic thrust output error and flux linkage angle in combination with human control experience to improve the system performance and enable good robustness.
Lane Model and Calculation of Lane Geometric Structure and Vehicle Deviation Angle and Position in Lane for Intelligent Vehicle
Authors: Chen Y. , He M.Y.
Published: March 2013

Lane model, lane geometric structure calculation, and vehicle deviation angle and position calculation is a crucial part in automatic drive of intelligent vehicle. In this paper, we introduce a lane model and calculation equations of lane geometric structure and vehicle deviation angle and position in lane. Firstly, we establish the world coordinate system and derive the lane boundary equation based on the actual lane alignment. Secondly, we derive the lane boundary equation in the camera coordinate system through the coordinate transformation. Then we build up the image coordinate system and the pixel coordinate system and derive the lane projective parameter model. Finally, we derive the calculation equations of lane geometric structure and vehicle deviation angle and position in lane. For we introduce the camera roll angle, the lane curvature change rate, and the reasonable assumption in the derivation, the lane model and the calculation are more general and accurate.
Research of Direct Drive Technology for Gear Measuring Center Based on Turbo PMAC2
Authors: Yang Ling , Chen Lei , Tang Hai Jun , Zhao Pei
Published: March 2013

With the rapid development of gear, gear measurement accuracy must meet the actual demand. For this problem, through the analysis of the characteristics of gear measuring center and the accuracy requirements, using direct drive technology, a direct drive control system of gear measuring center based on Turbo PMAC2 motion controller is proposed. After testing this system, the experiment shows that direct drive technology for gear measuring center can realize good positioning accuracy, and the measurement accuracy is improved.