bluuebunny/crossref_metadata_2025 huggingface dataset:
Strength Finite Element Analysis and Test Research of Steel Package Rotation Table Beam and Tumbler
Authors: Liu Jun Qing , Liu Hong Yu
Published: December 2012

In order to research the work status of steel package rotation table beam and tumbler, Pro/ENGINEER Wildfire software was adopted on establishing the three dimensions model of steel package rotation table beam and tumbler. ANSYS software was adopted on strength finite element analysis of steel package rotation table beam and tumbler under carrying 370 tons liquid steel package. Relative displacement figure, stress figure and strain figure were obtained. Relative distribution rules of displacement, stress and strain were found. Strain and stress on key positions of steel package rotation table beam were tested and analyzed. The relative error between tested value and finite element numerical simulation results of strain and stress on steel package rotation table beam was computed and analyzed. The method of combining finite element numerical simulation and test research provides important reference basis on the improvement of steel package rotation table.
Test Research on the New Electromechanical Axial-Flow Pump with Advantages of Small Vibration and Noise
Authors: Fang Bing , Zhou Qi Dou , Xie Jian Bo , Qiao Ming Zhong
Published: December 2012

For the vibration and noise of conventional axial-flow pumps being oppressive, a new electromechanical axial-flow pump with advantages of small vibration and noise had been designed, which integrated the impeller into drive electromotor by combining the rotor of motor and the blade of impeller. The new electromechanical axial-flow pump not only had small size and high efficiency, but also can greatly reduce vibration and noise by taking off the drive axis of pump. Performance tests had been done for the pump and results showed that the efficiency and head were very close to design value. Vibration and noise tests had also been done, results showed that vibration acceleration levels on the feet of pump base could be less than 110dB and airborne noise levels could be less than 75dB, which would be smaller than conventional axial-flow pumps.
Application Study of the Virtual Tactile Design in Product Design
Authors: Suo Xin Yu , Hu Rui Bo , Xu Ren Ping
Published: December 2012

In order to make the design of modern complex software support the multi-disciplinary optimization，realize its solving function，and confirm its comprehensive optimum scheme，We put forward a modeling method，which is combining the Freeform with surface design. Considered the characteristics of modern software design，we analyzed the important role that modern software played in the modeling process，studied the application process of modeling that combining freeform with the surface design.，and did the application of virtual design，for example，combined the technology of “virtual clay”with “force feedback” into the virtual design. Put the above method into the design of Dongba sculpture，and we confirmed that this technology can add or reduce the soil in accordance with the different demands， and is an effective method to solve the complex problems in the modeling process.
Evaluation Model of Aircraft Maintenance Mode Based on Improved AHP
Authors: Chen Jiu Sheng , Liu Chen
Published: December 2012

By analyzing Maintenance Significant Item (MSI) standard procedures of Maintenance Steering Group-3(MSG-3), building optimal evaluation index of maintenance mode selection, an improved hierarchy model based on MSG-3 is established for evaluation of maintenance mode. Scale selection and layer weight confirmation is improved to solve the sort of index weight in evaluation. It makes maintenance mode selection more reasonable. The hierarchy model is implemented on .NET platform. The simulation result proves the validity of the method.
Design and Realization of Hand-Held Smart Electrothermal Umbrella Applied New Materials
Authors: Gao Peng , Ping Yan , Han Gu Jing
Published: December 2012

In this paper, a new type of hand-held smart eletrothermal umbrella has been designed and realized. Bionic lotus leaf polymer film, which is hydrophobic, is applied as umbrella fabric. Based on micro controller unit STC12C5A60S2, the system starts work with temperature sampling of outdoor environment by temperature sensor chip DS18B20, when the temperature is lower than 10°C, high current half bridge chip BTS7970 drives the carbon- nanofiber- electrothermal -heating- film to work. Also, the system is equipped with manual -heating module. A LED light of caution stands on the top of the umbrella that can flicker following a regular pattern controlled by MCU. A LED highlight is mounted at the bottom of the hand handle in order to illuminate the ground at night. Additionally, a USB interface, which can provide 5V output, is reserved to charge exterior electric device. The whole system is powered by eight 18650 lithium batteries, when fully charged, they can support the system working 8 hours constantly. With a synthesis of aesthetic, pragmatic function which can be expanded, and high performance, this new type of umbrella enjoys broad market and perspective.
Research on Individualized Requirement Modeling Oriented to the Dynamic Synchronization
Authors: Yang Qin , Wei Dao Zhu , Tang Wei , Zhu Yue Feng
Published: December 2012

To improve the dynamic synchronization of customer requirement expression, the multi-view product model is put forward, the mapping operator of model’s knots and the certainty factor are established. The division principle of requirement nodes and measurement manner which have been provided with strong cohesion and weak coupling are established, so the requirement model oriented to the dynamic synchronization is formed. Finally an example is given to check the validity of the requirement model.
Stability Analysis of Pumper and Finite Element Analysis of Ladder Structure for a Scaling Ladder Pumper
Authors: Yang Wei Min , Pan Li Jiao , Lv Jun , Deng Xiao Lei
Published: December 2012

Scaling ladder pumper is one of the important fire-fighting equipment for high-rise buildings firefighting. Because of the complex terrain of the fire scene and the urgent requirement of fast rescue, it becomes very important to ensure the stability of pumper. This paper presents the stability analysis of 20m long scaling ladder pumper which is designed and developed by ourselves. According to the literature the paper lists five different kinds of loads affecting the stability analysis of pumper and discusses the verification methods and the principles of judgments. The finite element statics analysis of 3 section ladders assembly is carried out and it presents the stress and deformation of the scaling ladder under loads, which provides the basis for the structural design and improvement of the scaling ladder.
Research and Design of a Novel Mobile Police Station
Authors: Zhao Xiang Yang , Yuan Xia , Lou Yun
Published: December 2012

By studying the design theory of the mobile police station (MPS), the dynamic model of the MPS basic computing has been built then a novel MPS is designed. This kind of MPS, which consists of battery, chassis, body and electrical system, uses electric vehicle as the carrier and in combination with police needs is equipped with a variety of police equipment to meet the needs of establishing a modern police. The vehicle performance test has been done. The results prove that the performance of the MPS has reached the technical level of the Ministry of Science and Technology, showing the vehicle design is reasonable, and the matching calculation results of the electrical system parameters are basically the same as the experimental results.
The Conceptual Design of Table Jaw Based on Functional Principle Design
Authors: Zou Jun Yan
Published: December 2012

Mechanical product’s design can be divided into four stages that is task clarification, conceptual design, practical design and detailed design. The conceptual design is the most important and innovative stage of the four design stages. This paper deals with functional analysis and solutions of a table jaw and its conceptual design based on the theory of functional principle design. An innovative design method of a mechanical product is also discussed by means of functional principle design.
The Tolerance Optimization Design of Displacement Pump
Authors: Li Chun Yan , Ji Cong Dong , Ding Kai
Published: December 2012

The paper provided an overview of computer aided tolerance design and described the research methods of tolerance design. An example of a displacement pump was employed to analyze the angle and linear tolerance. With the application of tolerance optimization design of CAD assemblies combined with tolerance annotation and tolerance accumulation validation, the product design can be optimized and the cost can be reduced effectively.
DFSS of a Diagonal Impeller
Authors: Luo Xin Xing , Cai Xian Xin , Wang Guang Shen , Mi Dong
Published: December 2012

The diagonal impeller is a key component of the diagonal flow compressor which is a highly sophisticated system. A new DFSS methodology DAMV which has four phases, Define, Analysis, MDO and Verify, was utilized to the design of a diagonal impeller and high comprehensive performances were obtained.
Analyzing on the Principles of Intelligent Furniture Design
Authors: Zhang Guo Qiang , Zhang Ji Juan
Published: December 2012

By analyzing current China’s furniture industry, it is pointed out that the critical significance of developing intelligent furniture. In the article, it probes into the connotation, classifications, structural principles and design rules of intelligent furniture. Meanwhile, it systematically analyzes the problems of intelligent furniture design, and finally it gives corresponding development strategy and measures for leading intelligent furniture industry developing healthily and aiming to transforming China from one big manufacturing country into one powerful furniture-manufacturing country.
Analysis of Fabric Reconstruction Problem in the Apparel Production Design and Manufacture
Authors: Wu Chun Yan , Zhang Yu Jing , Qu Chang Feng , Xu Lan Bing
Published: December 2012

Nowadays， with the increasing demand of people in fashion design, the existing fabrics, structures, styles, colors and patterns can no longer meet the needs of the designers. It forces designers to make three-dimensional structural designs and reshape fabrics with various means based on the original ones, which may change the original fabrics largely in forms, textures and structures, and enrich the look of the original fabrics; meanwhile, it is also an extremely new way to interpret the fashion concept. What is more, it can broaden the range of employing materials and the innovative designs of structures, which has been an important method in modern fashion design.
Pilot Investigation on the Driving Posture Comfort among Malaysian Drivers
Authors: Hussin Mohamad Syafiq Aizat , Ghazilla Raja Ariffin Raja , Widia Mirta
Published: December 2012

The relationship between preferred driving postures, seat adjustment levels and the anthropometric characteristics of subjects were investigated in this paper. The study is a pilot investigation with the aim to understand comfortable driving postures for Malaysian drivers which will be a basis for further development of a comfort design model in the future. Wireless goniometer and photogrammetry method were used to measure the body’s joint angles. The goniometer was placed on the subject’s shoulders, elbows and knees to measure the shoulder displacement angles, elbow angles and knee angles, while foot-calf angles and trunk-thigh angles were measured using a photogrammetry technique due to the limited number of the goniometers. The seat positions, namely; the seat back angle, seat sliding distance and seat height were measured using a similar photogrammetry method. The subjects’ results show that stature affects their shoulder angles, elbow angles, knee angles, seat height and seat sliding distance. There was a positive correlation between the stature, elbow and seat sliding distance. However, there is no correlation between stature and seat back angles. Based on the results obtained, a taller subject preferred a driving posture that enables their arms to be outstretched; while a female subject preferred to sit closer to the steering wheel and a higher seat for visual demands.
Flexible Job-Shop Scheduling Problem under Uncertainty Based on QPSO Algorithm
Authors: Pan Feng Shan , Ye Chun Ming , Yang Jiao
Published: December 2012

Flexible Job-shop Scheduling Problem is the extending of the classical Job-shop Scheduling Problem, which has more practical significance than JSP. This paper firstly presents a solution for FJSP under uncertainty based on QPSO algorithm, mainly on uncertain operation time and uncertain delivery time, and then describes the mathematical model and solving process. Subsequent sections concentrate on the designed and conducted experiment simulation using instances, and analyze the experimental results on the QPSO performance compared with some results of other traditional algorithms from literature review. Finally, this paper illustrates QPSO has better performance and shows the promising for dealing with FJSP.
The Architecture for Solving the Cross-Domain Keywords During New Product Development
Authors: Tsao Yung Chung , Hsu Kevin Chihcheng , Tsai Yin Te
Published: December 2012

The team-members for the new product development (NPD) are recruited from different departments in the enterprises. So the team-members in the design teams range from novices to experts in NPD. The juniors developer in the design project team lack more successful product-design experiences as their seniority and skills. Therefore, those developers always query and search their problems with the limited terminology via the information systems or websites. So the results of the querying and searching always are limited to the similar domain-knowledge. The new product development (NPD) involves multidisciplinary knowledge such as accumulated experiences of knowledge-workers, and different technical and legal documents. The information systems (IS) facilitating the NPD processes often include document-based knowledge management system (KMS), Product Data Management (PDM), Product Lifecycle Management (PLM) systems etc. With these different systems, novices at various stages of NPD processes often have problems to use the exact and suitable keywords to query the problems from those information systems. The study proposes a case-based reasoning to construct a hierarchical knowledge model to record knowledge-workers’ experiences and to store the information of experiences and the recommendation of experts. The aim of the study is that the proposed architecture can query the information scattered in different information systems by using their individual-domain terminology and retrieve the better fitted results of the querying.
Application of Fractal Graphics in Fashion Design
Authors: Ge Qiu Ju , Sun Yun Tao , Liu Yan
Published: December 2012

This paper mainly discusses the characteristics of fractal graphics as well as theoretical basis, and the use of Maple and other mathematical software raw ingredients -shaped graphics, and thus will be fractal images to use to the fabric recycling, restructuring of fractal images, in order to create realistic visual effects, so that garment shape and fabric images pattern combination of organic, the final completion of the clothing creation. Fractal graphics of this new fashion element in fashion design is of great significance to design new and unique clothing, so that more practical significance to the study of fractal graphics.
Research on the Application of Operation Characteristic Curve in the Sampling Inspection for Foods in Prepackages with Fixed Content
Authors: Zhu Long Xian , Lu Pin , Wang Jing Hong , Yin Zhong , He Jian Xin
Published: December 2012

New enterprises for products in prepackages with fixed content always use sampling inspection to make sure the accuracy of the net quantity of their products according to JJF 1070-2005 “Rules of Metrological Testing for Net Quantity of Products in Prepackages with Fixed Content”, but this sampling inspection plan is expensive. The theoretical basis of the variable sampling plan in JJF 1070 was analyzed first. Then based on ISO 3951-1, the variable acceptance standard, a new sampling plan for products in prepackages with fixed content was developed, and it’s operation characteristic curve was drawn. Taking one company in Jinhua city of Zhejiang province of China as an example, a comparative analysis for the practical application of these two sampling plans was carried out. Under the premise that the sampling plan’s discrimination power was unchanged, the results showed that the acceptance effects of two sampling plans waere almost the same, while the reduction of sample size for the new one was 44%, the inspection time and cost were all reduced.
A Multi-Issue Negotiation Based Task Allocation in Virtual Enterprise
Authors: Hong Nian Song , Zhang Guang Yun
Published: December 2012

As to the task allocation in Virtual Enterprise(VE), a negotiation based task allocation model was constructed. According to this model, the calculation method of utility values for each dealer was given out and an equivalent utility based bidding strategy was put forward. At last, the process of muti-issue nogtiation based task allocation was discussed, and the alogrithm of generating equivalent utility was designed.
Introduction of IOT Technology in a Logistic System for High-End Wine Sales
Authors: Zhao Hua Dong , Liu Guo Ning , Guo Qian Qian , Ma Sheng Gang , Tie Ying , Li Cheng
Published: December 2012

The phenomenal growth of the economy of China and dramatically improved living standards, together with a population of over 1.3 billion, have activated the domestic wine business greatly and also helped make the wine become a part of daily diet in some developed regions or cities in China. However, due to the notorious business ethics, the loose business management and relatively poor governance of related administrative agencies, the authenticity and the quality of the delivered wine is uncertain for most cases. The present situation of wine sales not only may put the customers’ health in jeopardy, but also causes the financial loss for customers. Here we develop a management system for wine sales using the IOT technology. The system aims at ensuring the authenticity of wines and helping streamline the wine sales. Through slight modification this management system can also be used for sales of other luxuries of which the authenticity is the key concern for customers.
Modeling Method and Application in Digital Mockup System towards Mechanical Product
Authors: Zhang Huai Yu , Li Jia
Published: December 2012

The method of modeling is the key technology for digital mockup (DMU). Based upon the developing for mechanical product DMU, the theory, method and approach for virtual environment (VE) and virtual object (VO) were studied. This paper has expounded the design goal and architecture of DMU system, analyzed the method of DMU application, and researched the general process of physics modeling and behavior modeling.
Calculation of Tilting Torque for Converter Based on Solidworks
Authors: Guan Hong , Ren Xue Ping
Published: December 2012

One 150 ton converter of an iron and steel group occurred nodded phenomenon in the production process, the dynamic characteristics is poor. Initially be suspected that the converter exist “negative” torque steel. In order to clarify the changes of tilting torque in the steel process. apply Solidworks software ,create 3D model of converter, then determine the Center of gravity position and calculate the tilting torque of the converter with the tilting angle changes. Solidworks software is parameterized 3D design software, can calculate quickly and accurately, has strong analytical processing capabilities. This paper made to calculate provide a simple method of calculation for converter equipment design and maintenance.
A Single-Phase Electric Harmonic Monitoring System Design Based on the LabVIEW
Authors: Zhang Zong Jiu
Published: December 2012

This is a single-phase electric harmonic monitoring device based on the LabVIEW. It includes the detection and conversion circuit, anti aliasing filter circuit, data acquisition card, and PC software monitoring section. With the simple structure and easy hardware upgrade maintenance utility software, it can be used to store the historical data on line, query and monitor the power quality on line with the single phase power. The simulation results show that the system has the features of easy using, high precision, and good reliability.
Static Analysis of Stator Housing of Screw Drilling Rig
Authors: Sun Xing Wei , Wang Jun , Wang Ke , Feng Xing
Published: December 2012

Screw drilling rig’s hard core is motor unit assemblage. Stator housing’s thread tool recess is a key component and a weak link of motor unit assemblage. The finite-element method was used to do some static analysis of the thread tool recesses which were in the same conditions and different shapes, in order to improve the screw drilling rig’s operating life and reduce the failure accident. According to the nephograms and curves about the tool recesses’ stress, the most dangerous position is thread root. Minimizing the sectional dimension’s changing and increasing the chamfering’s radius are effective way to reduce thread tool recess’ stress concentration.
Research on Reliability Qualification Test of Mechanical and Electric Equipment Onboard
Authors: Xie Zong Ren , Lv Jian Wei , Liu Zhong Hua
Published: December 2012

The general idea of the reliability qualification test is described firstly, with the analysis of the test principle, reliability indicators and pilot programs is developed, according to characteristics of mechanical and electric equipments onboard and its specific circumstances in the real production applications, a series of parameters in the program have been discussed and limited, the possible problems in the implementation of the program have been taken into account, in order to maximize the promotion of effective reliability test of mechanical and electric equipments onboard, to make sure that it will be carried out smoothly.
Research on Fault Diagnosis for Bearing of CNC Machine Tools
Authors: Zhang Bang Cheng , Yin Xiao Jing , Zhou Zhi Jie , Zhang Yu Ling
Published: December 2012

For the use of CNC machine tools is more and more extensive, its fault diagnosis research is becoming more and more important. Failure forms are diversified, and fault reasons are very complicated. Once bearing that is an important transmission part is in fault, the machining efficiency will decrease and affect process accuracy, even make the machine work abnormally. This paper presents a deep analysis of bearing failure mechanism using the wavelet analysis method identify its failure, specially the motor and transmission machine bearing, which provides reliable basis for fault diagnosis and forecast.
Field Test of Wellbore Anti-Collision Monitoring System
Authors: Liu Gang , Yang Quan Zhi , He Bao Sheng
Published: December 2012

Avoiding well collision has become an increasingly critical challenge for the drilling industry in recent years. The wellbore Anti-collision Monitoring system is developed because the vibrations caused by an approaching drill bit can be monitored from the existing well casing and used to pre-alarm the wellbore collision. By analyzing the time-domain signal collected by the system in different drilling conditions, the influences of the drilling parameters (RPM and WOB) on drill bit signal are identified; and by analyzing the frequency-domain signal, the characteristic frequency range (200-400Hz) of the drill bit signal is determined. When the drill bit is approaching to the adjacent well, the reconstruction bit signal after band-pass filter changes significantly and agrees well with the on-site situation. The field test results show that the monitoring system is effective and provides a new way to the anti-collision techniques.
The PHM Research of Vessels Equipment Based on Condition
Authors: Wang Chun Jian , Liu Yong Zhi , Fan Hong Jun
Published: December 2012

For a long time, the monitor and maintain of navy Vessels equipment is based on the traditional maintain theories and plan maintain. But with the development of electronical and digitization, this kind of traditional mode is more and more hard to satisfy the maintaining need of Vessels equipment, and restrict the formation and exaltation of troops fighting strength. Currently the technologies of fault prognostics and integrated health management are becoming regarded, especially on many Vessels equipment systems. The information about abnormal situation of Vessels equipment was received and estimated by fault diagnosis and prognostic module. The diagnostic and prognostic results were supplied to the analysis and decision module to make the conclusion. The paper talks about the structure and function of the prognostic and health system, which is for certain kind of Vessels equipment.
Electromagnetic Nondestructive Testing in Cracked Defects of Oil-Gas Casing Based on Ant Colony Neural Network
Authors: Zhang Wei , Shi Yi Bing , Li Yan Jun
Published: December 2012

In this paper, a new method on quantitative analysis of magnetic flux leakage signal by ant colony neural network is proposed. Firstly, the parameters of the magnetic flux leakage signal which can reflect the various characteristics of cracked defects are determined by finite element method (FEM) simulation. Secondly, based on the study of the ant colony algorithm, the neural network model is established for the magnetic flux leakage signals processing. Finally, in the simulated working environment, the performance of the neural network is tested with the different signal features as input. The experimental results proved the feasibility of the ant colony neural network, verified the increases of the convergence rate and the accuracy of the neural network, and improved the efficiency as well as the quality of the quantitative analysis for the magnetic flux leakage signals.
The Research and Analysis on Valve Reliability of Reciprocating Compressor
Authors: Jin Jia Qi , Sui Guo Liang , Zhang Hong Tao
Published: December 2012

According to the working principle of reciprocating compressor valves, combined with the actual operation, analyze the reliability of the compressor valves and valve failure phenomenon, and raise ways to improve the reliability of the valve.
The Reliability Estimation of Double-Parameter Exponential Distribution on Zero-Failure Data
Authors: Zhong Jing Ming , Zheng Hai Ying
Published: December 2012

In the case of zero-failure data, we get the new estimation formula about the reliability of double-parameter distribution by using a new modified maximum likelihood estimation method and Bayesian estimation method.Finally calculation is performed concerning practical problem.
Sensitive Equipment Failure Assessment Caused by Voltage Sags Using Interval Probability
Authors: Li Hao , Xiao Xian Yong , Wang Ying
Published: December 2012

It is difficult to assess the impact of voltage sags on sensitive equipment because of the complex uncertainties involved in voltage tolerance capability. Determining the distribution regularity of voltage tolerance capability is an important step in voltage sag sensitivity assessment. Computers’ voltage tolerance capability are obtained through laboratory tests. The point-value distribution function of voltage tolerance capability is calculated by Maximum Entropy Principle and then the interval probability distribution function is derived based on confidence interval, so as to derive an interval probability of equipment failure probability. The proposed model is finally verified in the IEEE-30 bus system. The results are compared with that of stochastic estimation method, showing that the proposed method can reflect actual conditions better and obtain accurate result.
The Electronic Measuring System Design of Identifying Freshwater Fish Meat with Different Freshness
Authors: Yang Xiao Jing , Yan Zheng Hu
Published: December 2012

Freshwater fish has high nutritional value, in purpose of precisely detecting the freshness of freshwater fish meat, the system of identifying freshwater fish meat with different freshness which was based on multi-sensors fusion was designed. The system contained of two parts which were hardware and software, the hardware mainly included gas acquisition module, PH value acquisition module and conductivity acquisition module, and the software mainly included labVIEW and matLAB. The system which was designed was used for identifying freshwater fish meat samples with the BP artificial neural network method, and the results show that the recognition performance of designed system is very well.
A Low Frequency and High-Precision Microbarograph Monitoring System
Authors: Li Lei , Zhou Zhong Hai , Lv Cheng Xing , Liu Bo , Zang He Chao , Yao Pu Yu , Yuan Jian , Hua Zhi Li
Published: December 2012

A low frequency and high-precision microbarograph monitoring system is developed based on the Michelson interference of unequal-arm type, a method of signal modulation and compensation is presented, it improves the system’s anti-jamming capability and measurement accuracy. Experiments show that the monitoring system has a high accuracy and a wide dynamic range, especially for monitoring low-frequency signal.
Modeling and Simulation of the Dissolved Oxygen Monitoring System in Aquaculture
Authors: Huang Da Zhi
Published: December 2012

In aquaculture, the dissolved oxygen volume in water has a significant impact on fish growth and development, which should be monitored. In order to improve the monitoring results, the mathematical model of the dissolved oxygen monitoring system has been built. The PID controller has been designed with the Simulink software and its parameters have been optimized with the nonlinear control design module of the software. After the simulation analysis on the system, the system is stable. The optimized system has smaller overshoot and faster response, and gets a better control. The modeling and simulation of the dissolved oxygen monitoring system in aquaculture has laid an important basis on analysis of the system and has accumulated experiences for the practical application.
Research of a Variety of Fuel Injection Timing Control Experiment Station for Automotive Engine
Authors: Zhang Ji Hong , Shou Mao Feng , Shi Li
Published: December 2012

According to the requirements of the automotive professional teaching, design and development of the automobile engine to a variety of fuel injection experiment station. The structure and working principle of the Experiment Station has been introduced, the bench control with microcontroller program and can test on a variety of model engine fuel injection process by simulating a variety of engine fuel injection law.
Monitoring and Research of Power Ultrasonic Honing Vibration Frequency
Authors: Xing Xiu Qin , Gao Chun Qiang , Zhu Xi Jing
Published: December 2012

Aiming at amplitude decay with the change of the varying conditions problems in ultrasonic honing processing, this paper puts forward to the frequency of ultrasonic machining testing solutions. By measuring the change of the input current transducer, adjust the ultrasonic generator power output, and ensure that the ultrasonic generator adjust the output power according to load. Finally, stable amplitude, make the whole system in a resonant state, the amplitude of the oil-stone keep near biggest amplitude. This paper designed circuit measuring the current which can feedback current changes effectively, to provide the safeguard for adjusting the ultrasonic generator output power.
Principle Error Analysis of Three-Point Supporting Type Barycenter Measurement System
Authors: Hao Yong Xing , Liu Ya Hui , Yang Song Wei , Cheng Hai Tao
Published: December 2012

Taking elastic deformations of the platform and sensors into consideration, a simplified model of three-point supporting type barycenter measurement system was built. The tilt-angle calculation formula of the measured object caused by elastic deformations was obtained through the physical and geometrical analysis. Then the principle error of barycenter eccentricity was calculated in measurement process. On study of the principle error expression, it was concluded that measurement value of barycenter eccentricity is greater than the actual; the value of the principle error is proportional to the weight, the barycenter height and the actual barycenter eccentricity of the measured object, and is inversely proportional to the square of the distributing radius of sensors, the synthetic stiffness of the stacking part of platform and sensor. But the principle error has nothing to do with the phase angle of barycenter. Finally, simulation experiments were done using Adams. The experimental results agree well with the conclusions of theoretical analysis.
Design of Data Acquisition and Storage System for Digital and Analog Signal Based on FPGA
Authors: Wang Hong Liang , Wang Hai Rui , Ding Hai Fei
Published: December 2012

This paper mainly introduces a FPGA-based data acquisition system which is designed to acquire multi-channel analog signal and one channel digital signal. Analog data and digital data are stored into a FLASH memory in a mixed frame format. When the acquisition finished, the data in the FLASH was read out via the LVDS communication interface to a data-read device, and the host computer receives the data through the USB bus, so the subsequent data processing and analysis can be accomplished and the information we needed can be got. The design is applied successfully to a remote measurement system, and the data acquired is reliable and precise.
Study on the Attenuation Behavior of Acoustic Wave in ER Fluid
Authors: Yu Nan Hui , Fan Ji Jun
Published: December 2012

The attenuation behavior of acoustic wave in ER fluid which was made by mixing starch in silicon oil was studied through experiments. The results demonstrate that the particle concentration of fluid and the intensity of extra electric field have certain influences on the attenuation behavior of acoustic wave passing through ER fluid. When othe conditions are fixed, the amplitude of acoustic wave passing through ER fluid increases along with the increasing of particle concentration or field intensity; meanwhile, the acoustic wave presents attenuation with the increasing of distance measured, and its trend slows down when the concentration or field intensity increases. The analysis indicates that the solidification effect of ER fluid caused by extra electric field may be the reason for these phenomena.
An Measuring and Evaluation Method of Coaxiality Error for Large-Scale Holes
Authors: Xie Wen Juan
Published: December 2012

Abstract:One measurement system of coaxiality error aimd at large-scale holes is introduced in this paper, laser probe is used in the equipment to sample surface of the holes and realize non-contact measurement , actual surface profile signal of every cross section is obtained . The threshold de-noising approach based on wavelet transform is proposed for original signals to improve the measurement accuracy . After computing centre coordinates of every cross section based on least square principle, the reference axis is matched , so the evaluation rule of coaxiality error is deduced and the mathematical model is estabished. Experiment show that the method is accurate and reliable , simple and practical , so it can meet the requirements of high accurate measuring for large-scale holes at the industrial scene completely.
Vehicle Braking Efficiency On-Line Monitoring and Evaluation with MFDD
Authors: Li Wen Liang , Zhou Wei , Gao Li
Published: December 2012

According to the vehicle braking efficiency road test rules in GB7258, the braking efficiency on-line monitoring index, parameter, method and threshold are studied. Mean fully developed deceleration (MFDD) is selected as the evaluation index. Pitch angle which is used to monitor the road slope(less than 1%) is collected by gyroscope. Vehicle maximum deceleration is collected at the period of ABS working, which is to make sure that the road adhesion coefficient is more than 0.7. Vehicle maximum braking deceleration is analyzed, and it is used to exclude driving on pit, decelerating band, road step, even crash and so on. The rapid stop is identified with brake pedal travel senor. MFDD is calculated with braking deceleration and wheel speed, and wheel speed is collected from ABS with can bus. MFDD threshold is determined with passenger capacity monitoring with card reader. Finally, the method of vehicle braking efficiency on-line monitoring and evaluation with MFDD is given.
Structural Damage Detection of the Simple Beam Based on Responses Phase Space
Authors: Cheng Cheng , Nie Zhen Hua , Ma Hong Wei
Published: December 2012

In this paper, the technology of attractor phase space in chaotic theory is introduced and applied in the structural damage detection. Firstly the phase plane is constructed with the displacement and acceleration responses. Using the changes of phase plane topology of intact and damaged responses, a new damage index is extracted, and the structural damage existence and severity are identified successfully. Since some of the state variables can not be measured, a method of phase space reconstruction is proposed using single dynamic response. The dynamic responses are directly displayed into phase space, realizing transforming the signals from time domain to space domain. Then using the reconstructed phase space, the damage is diagnosed. The results indicate that the phase space reconstruction method has good robustness to noise, and higher sensitivity compared with traditional modal-based methods. The phase space reconstruction method can calculate the value of the damage index using single dynamic response, so that a single sensor can monitor structural damage existence and severity.
Design and Implementation of Distributed Battery Management System
Authors: Zhu Hong Lei , Wu Zheng Bin , Wang Da Long , Sun Jia Yao
Published: December 2012

Based on the characteristics of power Li-ion battery, a distributed battery management system (BMS) is designed and implemented for electric vehicle (EV), which is composed of a master system and several measurement modules. The measurement modules are embedded into various numbers of cells and detect the status information of the battery. The system structure is highly flexible and reliable. The testing results of this BMS with a battery charge and discharge test equipment show that it can measure and display the status information of the battery precisely and reliably with a flexible structure, which supports EVs running safely and reliably.
Energy-Saving Analysis for Power System Reactive Power Compensation
Authors: Yuan Xiao Hua , Dai Xian Bin
Published: December 2012

The alternator output power in the power system can be divided into active and reactive power. The active power (in kW) is that part of the electrical energy for doing work and heat loss, such as the conversion of mechanical energy, heat, light. The reactive power (in kVar) is that part of the electrical energy for the exchange of electric and magnetic fields in the circuit, such as transformers, motors, through the magnetic field can be passed to convert electrical energy; transmission lines in cable systems and a variety of load reactance (inductance and capacitance), and consumption of reactive power. With the rapid development of power system to study how to reduce energy loss in the power system is a very meaningful. In this paper, The Shizuishan plant desulfurization project as an example, illustrates the shunt capacitor reactive power compensation of the power system energy saving.
Energy Efficiency Analysis of Beijing Using the DEA-Tobit Two Stage Method
Authors: Wang Yi , Li Ying , Kong Fan Yu
Published: December 2012

After stepping into the later period of heavy chemical industry, China faces a serious problem on imbalance between energy supply and energy demand. Improving energy efficiency is a positive fact in settlement of this predicament. Therefore, it is imperative for decision makers to know the influencing factors on energy efficiency. This paper uses DEA-Tobit analysis, a two-stage procedure, to research the impacts on energy efficiency of Beijing in China based on the data from 2000 to 2006. In the stage 1 DEA, total-factor energy efficiency is calculated by DEA-Malmquist method. In the stage 2 DEA, the efficiency scores obtained from the stage 1 DEA are as dependent variables, and then we estimate the Tobit regression model. The empirical study demonstrates that industrial structure optimization contributes to improving energy efficiency, and the Beijing’s working emphasis in the future is to improve energy use efficiency for other energy categories.
Prediction of Airport Energy Consumption Using a Hybrid Grey Neural Network Model
Authors: Chen Jing Jie , Xiao Chen , Qian Wen Gao
Published: December 2012

Prediction and control of airport energy consumption plays an important role in promoting energy saving and emission reduction in the civil aviation industry. In view of the complexity and nonlinearity of energy consumption system, as well as a small number of airport energy consumption data, this study develops a hybrid grey neural network model, which organically combines GM (1, 1) model and BP neural network in parallel and series connections, on the basis of analysis of main prediction methods. With energy consumption data from one Chinese airport for the whole year 2010, this study analyzes and compares different prediction results using different models through matlab. It shows that the hybrid model has a better accurate prediction, and its prediction accuracy can be controlled within 7%.
Experimental Investigation on Ignition of Low-Volatile Pulverized Coal in a Tiny-Oil Burner in Oxygen-Enriched Conditions
Authors: Xu Dang Qi , Fang Fan , Zhou Hong Guang , Wang Hua Jian , Min Hong Bin , Yan Xiang Lin
Published: December 2012

To ignite a boiler, fuel oil is primarily used to pre-heat the combustion chamber of a furnace to its operating temperature, which consumes a large amount of oil, especially for igniting low-volatile coal. To save the oil, the plasma-chemical preparation and tiny-oil ignition technology are developed to ignite pulverized-coal. However, it is difficult to apply them to anthracite and lean coal. Therefore, this paper theoretically focused on the experiment of igniting low-volatile coal in a tiny- oil burner in oxygen-enriched conditions for developing an ignition technology to save fuel oil. The experimental results indicated that the ignition of low-volatile coal was achieved in a tiny- oil burner in oxygen-enriched conditions, and appropriate amounts of pure oxygen feeding into the burner could promote the burning-out of fuel oil and pulverized coal, which was beneficial to reducing black smoke from oil and saving fuel oil in ignition process.
Energy Saving Methods by Using Ground Source Heat Pump in Buildings
Authors: Liu Jian Tao , Ren Jian Xing , Ma Xiao Cheng , You Kun Kun , Li Fang Qin , Yang Yong Wen
Published: December 2012

This paper analyzes the low-carbon society research background of ground source heat pump (GSHP) and presents the principles of GSHP system. It describes two kinds applications of GSHP system, and reveals the development trend of the GSHP system.
A Significant Impact Parameter Extraction Method Based on Rough Set Attribution for Reduction Fuel Consumption Estimation
Authors: Chen Jing Jie , Zou Ying Huan
Published: December 2012

QAR recorded a large number of the real operation of flight fuel consumption process parameters. How accurate expression of the aircraft fuel consumption using a limited number of parameters to ,And then guide the fuel installation of Both theory and engineering value, In this paper, the method based on rough set attribute reduction, In order to quickly capture the QAR parameter populations for fuel consumption is estimated to significantly affect parameters. This method is more time-consuming short flight mechanics analysis methods, Subjective impact of low, And universal. In addition, the method also integrated into the continuous attribute discrimination algorithm based on information entropy. Further improve the reliability of the results of data analysis. Finally, the algorithm implementation steps and simulation results verify the effectiveness of the algorithm.
Luminescent Layer by Layer Thin Films Based on Polyoxometalate and Poly(amidoamine) Dendrimer
Authors: Zhang Xiao Feng , He Xiao Lei , Huang Qiu Feng , Lin Shen
Published: December 2012

Ultrathin multilayer films containing polyoxometalate (POM) K11[Eu(PW11O39)2] (Eu(PW11)2) and poly(amidoamine) (PAMAM) dendrimer were prepared using layer-by-layer (LBL) assembly method in the present work. The stable multilayer films were assembled by alternate adsorption of negatively charged POM and positively charged PAMAM from their aqueous dispersions. The growth of the muhilayer films is regular．The proposed novel immobilized method exhibited good stability and the photoluminescent behavior of films at room temperature was investigated to show the Eu3+ charaeteristic emission pattern，which is important for practical application.
Effects of Annealing in N2 and Air after CdCl2 Treatment on the Properties of CdS Thin Films
Authors: Zhu Yan Yan , Xu Run , Fang Ze Bo
Published: December 2012

The influence of annealing under different conditions on CdS films after CdCl2 post-growth treatments was investigated. The crystalline quality of CdS films was improved after the treatment with CdCl2 at 400°C in N2.
Offshore Adaptability of the CO2 Pre-Cooling Dual Nitrogen Expander Natural Gas Liquefaction Process
Authors: Zhu Jian Lu , Li Yu Xing , Wang Wu Chang , Sheng Huan Huan , Liu Yong Hao , Xie Bin , Yu Xi Chong
Published: December 2012

CO2 pre-cooling dual nitrogen expander liquefaction process was proposed for the LNG-FPSO unit and compared with propane pre-cooling dual nitrogen expander process and mixed refrigerant pre-cooling nitrogen expander process by simulation. Gas property sensitivity of the process was analyzed from the thermodynamic point of view. And offshore adaptability of the process was evaluated. The results show that the process will be suitable for mid to large-scale LNG production in severe sea condition. And it will be not sensitive to the changes of gas temperature, pressure and composition.
Simulation of Fluidized Bed Oxygen Permeable Membrane Reactors for Hydrogen Production from Natural Gas
Authors: Ye Jian Wen , Xie Dong Lai , Yang Zhen Hua , Cao Zhi Yu
Published: December 2012

Hydrogen is an important chemical commodity. Fluidized bed oxygen permeable membrane reactor is a novel technology for hydrogen production from natural gas reforming. An Aspen model is built for this novel reactor. Influences of reaction pressure, oxygen to carbon ratio, and steam to carbon ratio on the hydrogen concentration in syn-gas, hydrogen yield, and reaction temperature and methane conversion are studied. The results are compared with the ordinary fluidized bed reactor. It shows that the fluidized bed oxygen permeable membrane reactor has a higher methane conversion and a hydrogen yield and a higher hydrogen concentration in the syngas, due to its in-situ oxygen separation from air.