bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of Sample Size of Needle Felt on its Strength Measurement
Authors: Mao Ning , Chang De Qiang , Liu Jing Xian , Sun Xi
Published: March 2013

Strength and elongation are two important parameters for evaluating the durability property of needle felt which is now widely used for the air pollution control. It is necessary to measure them as reasonable as possible. The paper researches on the effect of sample size on the strength measurement of needle felt. The results show that sample width of 5cm and sample length of 20cm are suitable value for strength measurement of needle felt and sample length has a bigger effect on strength measurement of needle felt than sample width.
Shaft Vibration Signal Denoising Based on Wavelet Analysis
Authors: Sun Tie Qiang , Liu Rong , Qiu Zhi Qi
Published: March 2013

In actual , there exist inevitably a lot of interference from neighbor machine and noise from surrondings in mechanical vibration signal measured by sensor ,which is disadvantageous for condition monitoring and fault diagnosis. In order to eliminate the axial vibration signal in the noise, using Wavelet packet denoising method in this article, Emulating experiment s were carried out under the MATLAB software ,original signals adopted vibration impulsion signal produced by vice position of faulty bear. Separation result s confirm this method successfully ext ract original source ,efficiently removes noise.
Accuracy of Stress Analysis Using Numerical Integration of Elastic Half-Space
Authors: Čajka Radim
Published: March 2013

In case of constructions placed on subsoil, it is necessary to create a rigidity matrix for the element subsoil. That rigidity matrix should be then added up in respective positions with the rigidity matrix of an element. To clarify the proposed model of the subsoil, a method is derived for determination of vertical subsoil stress analysis under any shape of a slab construction by means of numerical integration and theory of isoparametric elements using the Jacobian transformation. This approach is rather original and represents the key contribution of this work in interaction solutions. Using the proposed approach, the method can be employed for any shape of a finite element.
Influence of Passive Joint Damping on Modal Space Decoupling for a Class of Symmetric Spatial Parallel Mechanisms
Authors: Tian Ti Xian , Jiang Hong Zhou , He Jing Feng , Tong Zhi Zhong
Published: March 2013

In this study, we analyze the influence of passive joint viscous friction on modal space decoupling for a class of symmetric spatial parallel mechanisms. The Jacobian matrix relating the platform movements to each passive joint velocity is first gained by vector analysis and the passive joint damping matrix is then derived by applying the Kane method. Next, an analytic formula index measuring the damping non-proportionality is proposed using classical modal analysis of dynamic equations in task space. Based on the index, a new optimal design method is found which establishes the kinematics parameters for minimizing the non-proportional part of damping and achieves optimal fault tolerance for modal space decoupling. To illustrate the effectiveness of the theory, the new method was used to redesign two configurations of an actual group manipulator.
Research of Socket Welds Vibration Fatigue Resistance and Application of Wavelet Transform Method in Damage Detection
Authors: Lin Lei , Xu De Cheng , Xue Fei , Ti Wen Xin
Published: March 2013

Socket welds are widely used in nuclear power plants. According to industry experiences, vibration fatigue of socket welds is becoming one of the major ageing issues. It is very important for the operating engineers to monitor the vibration condition and detect the damage before leak occurs. This paper studies the damage identification technology applying wavelet transform method. Small bore pipes with socket welds are installed on the vibrating table and vibrate at the frequencies that near its first natural frequency. The acceleration response signal is acquired and decomposed by wavelet method. The energy of decomposition signal shows a suddenly variation when crack occurs. From this study, a parameter that is sensitive to vibration fatigue is defined and has the potential application value in the nuclear power plants to identify the vibration fatigue damage.
Reliability Study about the Approximation Methods of Censored Data in Fatigue
Authors: Hu Wei , Zhang Yi Liang , Li Xiao Hui , Li Jin Wei
Published: March 2013

For obtaining fatigue limit and dealing with censored data, the" pair- life -weighted” is proposed in this paper. According to the fatigue testing of TA15 electron beam welded specimens, conventional methods and two methods in this article are used separately to calculate the fatigue limit and lognormal distribution parameters of the lives at different stress levels, and C-P-S-N curves are obtained and their corresponding mathematical expressions of 12 groups under 2 Confidence and 6 reliability are expressed as a three-parameter model. The results show that the" pair- life -weighted method " is in good agreement with the traditional method, when the lives have a difference of 3 times at the same stress, the fatigue limit only have a difference of 0.5%, it is the further evidence of the practicability in engineering about the traditional method.
A Precision CNC Turn-Mill Machining Center with Gear Hobbing Capability
Authors: Chen Xian Shuai , Zhang Dai Lin , Yuan Song Mei , Zhang Xiao , Chen Jian Yu , Du Ru Xu
Published: March 2013

With ever increased demand for reduced sizes and increased complexity and accuracy, traditional machine tools have become ineffective for machining miniature components. Typical examples include dental implants, the parts used in mechanical watch movement, and the parts used in medical endoscope. With complex geometry and tight tolerance, few machine tools are capable of making them. This paper introduces our PC-based CNC Turn-Mill Machining Center. It has 5 axes, an automatic bar feeder, an automatic part collection tray, and a tool changer. In particularly, it has a special synchronization control algorithm that gives not only higher accuracy but also ease of use. In addition, to improve the accuracy, the software based volumetric error compensation system is implemented. Based on the experiment testing, the machining error is ± 3 µm in turning, ± 7 µm in milling and the maximum profile error is less than ± 7.5 µm in gear hobbing.
Improvement in Elastic Modulus of MWCNT/Epoxy Nanocomposites
Authors: Her Shiuh Chuan , Lai Chun Yu
Published: March 2013

The effect of multi-walled carbon nanotubes (MWCNT) on the elastic modulus of MWCNT/epoxy nanocomposites was investigated. Carboxylic acid-functionalized MWCNTS (MWCNT-COOH) were obtained by oxidation pristine MWCNTs via sonication in sulfuric-nitric acid. Epoxy-based nanocomposites reinforced with MWCNTs with and without functionalization were prepared. In this work, the elastic modulus of MWCNT reinforced nanocomposite was determined by free vibration test. Experimental results showed that functionalized MWCNTs improved the dispersion of MWCNTs in epoxy matrix leading to the enhancement of elastic modulus compared to those containing MWCNTs without functionalization. Nanocomposites prepared with 1 wt % of MWCNT-COOH exhibited 44 % increase in Young’s modulus.
Research on Friction and Wear Behavior of Rubber in the Mixture of Crude Oil with Water
Authors: Lv Xiao Ren , Huo Xu Yao , Qu Guang Zu , Wang Shi Jie
Published: March 2013

In order to choose the rubber material and improve the service life of Progressing Cavity Pump (PCP ) when exploiting offshore crude oil, it is important to analyze friction and wear behaviour of stator and rotor of PCP in the mixture of crude oil with different water content. The friction and wear test about Nitrile -Butadiene Rubber (NBR) and Fluorine Rubber (FKM) were carried on ring-on-block tester, the wear loss was observed by electron microscope, the wear mechanism was also discussed. The results show that: (1) FKM owns better wearing resistance than NBR in the mixture of crude oil with different water content; (2) when the content of water in the mixture is less than 26%, the frictional coefficient of sample is 0.05, due to the oil film between the friction pairs; (3) when the content of water in the mixture is more than 26%, the frictional coefficient increases to 0.4, because of the water film between the friction pairs.
The Analysis of the Experiment of Polarized Light in Uniaxial Dichroism Crystal
Authors: Ye Nan Yang , Han Da Hai
Published: March 2013

In the experiment of the polarization of light, circularly polarized light can’t be got though all instruments are carefully adjusted and the polarized light we get is generally regarded as elliptically polarized light. We analyzed the process and find the light we get isn’t circularly polarized light or elliptically polarized light as usually thought and deduced the light intensity distribution function and it can fit the experimental results with small errors.
Cloning and Expression of β-Glucosidase Gene from Bacillus pumilus
Authors: Li Lin , Ji Qing Long , Hao Jian Feng , Yuan Lin
Published: March 2013

Strain Bacillus pumilus AC-6 was separated from the soil, which can produce β-glucosidase. According to the β-glucosidase gene of strain SAFR-032, primers were designed to clone the β-glucosidase gene from AC-6. The sequence of β-glucosidase gene from AC-6 is 1437 bp and encode 478 amino acids. Compared with β-glucosidase gene reported in GenBank, the similarity of the gene sequence is 98%. We cloned β-glucosidase gene into the vector pGEX-4T-1 and transferred it into the competent E. coli DH5α and BL21（DE3）for expression.
Influence of Pattern Coating Thickness on Porosity and Mechanical Properties of Lost Foam Casting of Al-Si (LM6) Alloy
Authors: Sulaiman Shamsuddin , Ariffin M.K.A.M. , Tang S.H. , Saleh A.
Published: March 2013

The combination of Aluminum alloy with lost foam casting (LFC) process is best applied in automotive industry to replace steel components in order to achieve light weight components for reducing fuel consumption and to protect the environment. The LFC process involves process parameters such as the degree of vacuum, foam degradation, expanded polystyrene (EPS) foam density, permeability of foam pattern coatings, pouring temperature, filling velocity, cooling rate, and pressure. The effect of polystyrene foam pattern coating thickness on the porosity and mechanical properties of Aluminum Al-Si LM6 alloy were evaluated experimentally. The coating thickness was controlled by slurry viscosity at range between 18sec to 20sec using Zahn viscosity cup No.5 and the foam pattern was coated up to fifth layer. Aluminum Al-Si (LM6) molten metal was poured into expandable mould and castings were examined to determine porosity distribution, mechanical properties and microscopic observation. Results from X-ray testing reveal the porosity distribution on Aluminum Al-Si LM6 castings is greater at thicker foam pattern coating sample. Meanwhile, the tensile strength of casting decreases when foam pattern coating thickness increases. Microscope observation portray the present of porosity on the casting which shows more gas defects present at thicker foam pattern coating sample. The source of porosity in LFC process is due to air entrainment or the entraining gases from polystyrene foam decomposition during pouring of molten metal. As a conclusion, mechanical strength has inverse relationship with porosity.
Current Characteristics of AlGaN/AlN Ultraviolet Photodetector with Metal-Semiconductor-Metal Structure
Authors: Hsieh Li Zen , Chang Jun Yan
Published: March 2013

An AlGaN/AlN ultraviolet photodetector with metal-semiconductor-metal structure is fabricated on n type 4H-SiC substrate, which is conventionally epitaxial by metal-organic chemical vapor deposition (MOCVD). The MSM structure is composed of two interdigitated fingers usually formed by Schottky contact which deposited metal with high work function metal by e-beam metallization and thermal evaporator on high resistance layers. This type of MSM has potential advantages, including ultra low dark current because of its rectifying contacts. The current Characteristics are revealed in this paper. A reference sample of AlGaN/GaN heterostructure with two-dimensional electron gas (2DEG) is also fabricated for comparision.
Study on Simulation of Ocean Wave Generation System Based on SIMULINK
Authors: Wang Shi Ming , He Jing
Published: March 2013

Designed a generation system by using ocean wave power for seabed-base detector. The system is mainly composed of an energy conversion device, hydraulic system, power generation system and automatic control system. This paper showed the composition of each subsystem, including the structure of axial flow turbine and the conversion equation of PID control system, hydraulic motor system. The simulation model is established by using SIMULINK block of MATLAB software, gave the results in two different conditions, one have the stability external input and the other don’t meanwhile the hydraulic system will turn to accumulator circuit. The simulation results show that this system can provide stable power output as the real system design reference.
Evaluation of Cadmium Contamination in the Sediments of Northern Kaohsiung Harbor, Taiwan
Authors: Chang Li Chen , Chen Chih Feng , Chen Chiu Wen , Dong Cheng Di
Published: March 2013

The distribution, enrichment, accumulation, and potential ecological risk of Cadmium (Cd) in the surface sediments of northern Kaohsiung Harbor, Taiwan were investigated. Sediment samples from 12 locations of Kaohsiung Harbor were collected and characterized for Cd, aluminum, water content, organic matter, total nitrogen, total phosphorous, total grease, and grain size. Results showed that the Cd concentrations varied from 0.25–2.28 mg/kg with an average of 0.58±0.58 mg/kg. The spatial distribution of Cd reveals that the Cd concentration is relatively high in the river mouth region, and gradually diminishes toward the harbor entrance region. This indicates that upstream industrial and municipal wastewater discharges along the river bank are major sources of Cd pollution. Results from the enrichment factor and geo-accumulation index analyses imply that the sediments collected from the river mouth can be characterized between moderate and severe degree enrichment and between moderate and moderate to strong accumulation of Cd, respectively. Results of potential ecological risk index indicate that the sediment has higher to high ecological potential risk. Therefore, a strategy for effective controlling and managing river upstream pollution needs to be immediately implemented in order to improve the sediment quality and alleviate the ecological risk.
Selective Glycine Polymorph Crystallization by Using Silver Nanoparticles
Authors: Lu Fei
Published: March 2013

In the present study, we demonstrate that silver colloid can serve as additive and induced the γ-form polymorph of glycine crystals in the netural solution. The silver colloid could quickly affect the packing arrangements of glycine molecules in aqueous solution leading to the competitive nucleation of the two polymorphs.
Experimental Study of Bamboo Fiber Cushion Packaging Materials for the Express Packaging
Authors: Liu Ye , Wang Shi Hang
Published: March 2013

Obtained a new material named foamed bamboo fiber cushion packaging materials for the express packaging . The producing technics processes as follows, bamboo fiber firstly be dug into the NaOH solutions for N hours, and then wash them into the neutrality. Then, combine them with the gelatinized starches and propane triol. Next add the foamed agents, cross linking agents and nucleator agents. Finally deliver the composites into the reaction container and the composites will be foamed under a high temperature. By adding different contents of photo starches and contrasting the results of the experiments, it could conclude that 20g photo starches could bond the bamboo fibers and adhesives more efficiently without to be excessive. By selecting different kinds of foamed reagents and researching the suitable ratio of them, Finally cut the foamed productions into small grains. Test the static buffer characteristics of the small grains, and then σ -ε、C-ε curves could be recorded.
Experimental Study on the Fatigue Properties and Reliability for the Steel of Elastic Oil Sump
Authors: Li Bin , Liu Zong De , Duan Peng
Published: March 2013

The elastic oil sump is commonly used as support parts in large-scale thrust bearing. It often operates under fluctuating load conditions during service. So, fatigue analysis of the material of the elastic oil sump is of great significance. In order to obtain the fatigue design data of the material of the elastic oil sump, the systematic tests on uniaxial tension-compression fatigue at room temperature are made. The fatigue limits and the fatigue life curves of the steel of the elastic oil sump are determined at different cyclic stress ratio. The P-S-N equations are calculated by the probabilistic methods. The test results provide a theoretical basis for the safety of life assessment of the elastic oil sump.
Evaluation of the Status of Copper Contamination of Surface Sediments of Jen-Gen River Estuary, Taiwan
Authors: Dong Cheng Di , Tu Yao Ting , Chen Chiu Wen , Kao Chih Ming , Chen Chih Feng
Published: March 2013

Major objectives of this study are to evaluation the enrichment, accumulation, and potential biological effects of copper (Cu) in the surface sediments of Jen-Gen River estuary, Taiwan. Eleven sampling locations were installed near the mouth of Jen-Gen River to collect sediment samples for analyzing Cu. Results of laboratory analyses show that concentrations of Cu in the sediments are between 67 and 278 mg/kg with an average of 181±61 mg/kg. The spatial distribution of Cu reveals that the Cu concentration is relatively high in the boundary of the river estuary. This indicates that upstream industrial and municipal wastewater discharges along the river bank are major sources of pollution. Results from the enrichment factor (EF) analysis imply that the sediments can be characterized as minor to moderately severe degree of Cu enrichment. Results of geo-accumulation index (Igeo) analysis indicate that the sediments can be characterized as none to moderate degree of Cu accumulation. Base on the comparison with sediment quality guidelines (SQGs), the concentrations of Cu in Jen-Gen River mouth sediments may cause acute biological damage.
An Interpolation Algorithm Based on S-Curve Feedrate Profile and Look-Ahead Function
Authors: Sun Ke Zheng , Zhou Xue Feng , Zhang Gong , Chen Xian Shuai
Published: March 2013

In this paper, a novel interpolation algorithm for high speed machining is presented, which integrates S-curve acceleration/deceleration method in look-ahead function. A time division based speed planning method is used to implement discrete S-curve acceleration/deceleration method. The implementation of the proposed algorithm is given out. The proposed algorithm improves the processing efficiency and avoids the shock of machine tools caused by frequent acceleration and deceleration. The experiment shows that the proposed algorithm satisfies the requirements of interpolation accuracy and machining efficiency in high speed machining.
Adaptive Backstepping Stopping Control of Urban Rail Vehicle
Authors: Zhang Meng Nan , Xu Hong Ze
Published: March 2013

Stopping accuracy is an important index to measure the performance of Automatic Train Operation (ATO), as well as a significant guarantee of the safety of the train’s operation. However, during the process of braking, the stopping accuracy of the urban rail vehicle is affected by the line conditions, brake shoe friction coefficients and random noise. A braking model of the train reflecting these uncertain conditions and principle of braking system is derived in this paper. Based on this model, an adaptive backstepping control scheme is proposed to track ideal braking curve. Using Lyapunov stability theorem, the stability and the convergence of the adaptive algorithms are proved. Simulation results verify that this method not only overcomes the impact of uncertain parameters but also greatly improves the stopping accuracy of the train without loss of the comfort level of passengers.
Research on Hydraulic Pitch-Control System of Wind Turbine
Authors: Song Jin Chun , Ren Guan Gan , Ren Yu Jie
Published: March 2013

It is usually difficult to establish an accurate mathematical model for hydraulic servo system because of its complicated and non-linear properties. However, bond-graph method has its unique advantages in modeling such as processing multiple energy conversions. Furthermore, good results could be achieved by combining fuzzy control with normal PID control. As a result of air current load interfering with the system in changeable and complicated environment, process control is obviously important. Taking 1MW wind turbine pitch-control system as an example, a simulation research based on the above method is conducted.
Ship Cabin Layout Optimization Design Based on the Improved Genetic Algorithm Method
Authors: Wang Yun Long , Wang Chen , Lin Yan
Published: March 2013

Based on the improved genetic algorithm method, a kind of the optimization techniques to solve the problem about the ship cabin layout is presented. The problem about the ship cabin layout is a NP-hard problem. This article has used the genetic algorithm method to solve it .However, for the simple and easy procedure, the basic genetic algorithm is slow and easy to fall into a local optimal solution. Therefore, it must be improved. This article has made the following two improvements: on the one hand using the niche method to solve the multi- peak problem; on the other hand using the climbing method to solve the slow and premature convergence. The simulation tests show that this approach proposed by authors is feasible and valid and the result is satisfied.
Design on the Bearing Forging Spray Cooling Control Device
Authors: Huang Hong Bing , Wang Yong Ming , Sun Ying Qiu
Published: March 2013

At present the spray cooling method is used to the high carbon chrome bearing steel in the forging process. The traditional manual method of spray cooling controlling easily cause the slow cooling speed and uneven. Especially above 850 degrees Celsius, it is possible to produce reticular carbide which affects the bearing service life. According to the shortage of the existing technology, the paper design a kind of bearing forging controlled cooling device which can accurately control the spray cooling mainly consisted of delivery area, spray area, soak area and measuring temperature area. This device can complete spray cooling, soaking, measuring temperature, and other functions, effectively solves bearing forging spray cooling accurate controlling problem.
Design and Simulation of Fuzzy-PID Vector Control System Based on Mine Hoist
Authors: Wu Yan Xiang , Zhang Chao Jun , Liu Yu Qing
Published: March 2013

According to the requirement of smooth operation and accurate positioning for AC speed regulating system of mine hoist, a new control system that based on vector control of Fuzzy-PID was designed. The best control scheme for mine hoist was obtained, which was also validated by simulation comparison with conventional PID control system in the MATLAB/Simulink. The result showed that the proposal was feasible and had practical value.
Experiment Research and Model on Drilling Force of CFRP
Authors: Liu Shu Nuan , Gao Fei , Tian Xi Tian , Li Bo
Published: March 2013

In this paper, the authors built the test device for CFRP drilling machining and drilling force detection system. An experimental research was conducted on the drilling force of CFRP drilling. Based on the multiple liner regression analysis through SPSS software, the empirical formula, considering the spindle speed and feed rate, is presented for predicting the drilling force. The results obtained were satisfactorily validated by comparing the experimental findings with the corresponding theoretical data and it is possible to conclude that the model affords a focused approach to the definition of the most appropriate drill geometry and cutting parameters in composite materials drilling.
Research on Improvement Algorithm of Model Free Learning Adaptive Controller
Authors: Ren Gang , Qin Pin Le , Lin Yan , Wang Yun Long
Published: March 2013

To improve the convergence rate of model-free learning adaptive controller (MFLAC) and decrease difficulty of parameters choice in control law, a new design method of MFLAC is presented. The controller proposed in this paper is designed based on pseudo gradient concept with solution by introducing multi-innovation method. In order to illustrate the effectiveness of the proposed method，we have given an example.
Application of DEA-DA Model and Method on Quality Control in Production Process
Authors: Yang Yin Sheng , Guo Chang Qing , Cheng Yun , Yang Jun
Published: March 2013

In this paper, we conducted intensive research on the application of DEA-DA model and method on quality control in production process, and put forward the applied train of thought and the measure. Otherwise we chose 10 kinds of equipment to verify the model. At last, we put forward the measure to distinguish the well quality product from newcome ones and determined a newcome sample’s quality well or not.
Hybrid Projective Synchronization for the Fractional-Order Chen-Lee System and its Circuit Realization
Authors: Lao Seng Kin , Chen Hsien Keng , Tam Lap Mou , Sheu Long Jye
Published: March 2013

The growing interest shows the importance of the control of chaos in fractional-order systems in recent years. This paper investigates in the hybrid projective synchronization of two chaotic systems with fractional-order, which were derived from Euler equations of rigid body motion. Theoretical analyses of the proposed methods are validated by numerical simulation in the time domain. Moreover, the synchronization system is realized using electronic circuits with fractance in the frequency domain.
New Planning of Pipe Cooling in Temperature Control for Mass Concrete
Authors: Tang Hao , Cai De Suo , Yang Li
Published: March 2013

Pipe cooling is a significant measure for temperature control in the construction of concrete dam. In the past, studies concerning pipe control are quite simple, most of which are confined to the theories. They only focus on the positive effect of pipe control in reducing thermal rise, while paying little attention to its negative effects in elevating temperature stress. This paper carries out example verification on programs such as cooling height, distance between pipes, cooling stage, cooling temperature control, etc on the basis of simulation calculation program of the temperature field and thermal stress in the whole process, so as to seek the optimal effect of pipe cooling thus reducing thermal stress and improving the anti-crack reliability of the concrete.
Iterative Adaptive Control of a Three Degrees-of-Freedom Aeroelastic Wing Model
Authors: Tar József Kázmér , Rudas Imre J. , Bitó János F. , Kósi Krisztián
Published: March 2013

The aeroelastic wing model is an underactuated 3 Degrees-of-Freedom (DoF) system in which only a single control signal can be applied. Its model-based control attracted much attention recently. In the present contribution the effects of 20% modeling error in two significant system parameters are investigated in PI and P-type controllers that can be made adaptive by the application of Robust Fixed Point Transformations (RFPT). It is shown that by the use of this simple adaptive technique operating with altogether 4 control parameters precise control of the trailing-edge surface deflection is possible. This statement is substantiated by simulation results.
LABTM Control System Based on FPGA
Authors: Li Xian Feng , Wang Xiao Peng , Qi Xin Da , Wang Yan , Yu Ping
Published: March 2013

This paper presents the digital PI control method for design and simulation of a high precision limited angle brushless torque motor control system in Field Programmable Gate Array device (FPGA). The direct drive structures which are widely applied in many servo control fields. Matlab Xilinx System Generator® toolbox based on Fixed-Point Arithmetic is used to design the digital PI controller using DSP architecture, plot the responses of the control system and generate the VHDL source code. The control system model consists of a digital PI, a real LABTM, and a real absolute Inductosyn, encoder to rpm and position blocks. Through loading generated codes in process of the simulation that built by the digital discrete model, it is verified that the rising time of current loop is only 1.2ms, and rate loop is 8ms, overshoot is rarely 4.2%. Finally, the comprehensive positioning accuracy of system can reach up to ±5 arc sec, and the rate jitter achieves 5% with the ±4 arc sec accuracy absolute Inductosyn.
The Research of Applying Parallel Streaming Technology on Developing Cloud Computing Platform for Delivering Medical Images
Authors: Tseng Hung Li , Chen Chin Hsing , Chang Yuan Jen , Tan Sun Yen , Huang Wen Tzeng
Published: March 2013

At present, most of medical facilities are using PACS (Picture Archiving and Communication System) to manage various medical images. PACS is a medical image management system and the main purpose of PACS is to replace conventional film with digital images and to allow medical professionals to view digital photographs or images of diagnostic tests, interpretations and related data simultaneously from multiple sites. In the paper we further propose a Cloud image data platform which is suitable for managing medical images. This platform collaborates with PACS in medical facilities and it immediately delivers images captured by equipment via parallel connection to remote server in form of parallel streaming. Taking advantage of parallel streaming technology, we have solved the medical resources sharing problem and problem caused at delivering and storing consecutive high resolution image files. Patients who are to be transferred to other medical facilities will no longer re-do all examinations. This saves medical resources and physician’s precious time. Our experiments shows our parallel streaming delivering platform improves the transmission efficiency on LAN (Local Area Network), TANet (Taiwan Academic Network) and home-group network by 45.6％, 49.4％, and 8.1％ respectively in comparison with conventional single server system using FTP transmission.
Color Image Enhancement Methods Based on Matlab
Authors: Xie Xiao Min , Wang Chang Ming , Zhang Ai Jun
Published: March 2013

The aim of the paper is to provide three enhancement methods for processing color images, including: RGB Histogram equalization, the method based on HSI and Multi-scale Retinex with color restoration (MSRCR). Firstly, we shall briefly introduce color image enhancement and related concept. Then, emphasis is placed on the principle of the three methods. Afterwards, we make comparison among the three methods. Finally, we can get a conclusion that: MSRCR greatly not only strengthens the details but also keep the color of the original image and acts more consistent with characteristics of human vision. However, it takes longer time. Simulation results provide a guidance and reference for the choice of color image enhancement methods.
Realization of Car’s Frontal Projected Area Based on OpenCV
Authors: Dong Chun Bo , Hu Xing Jun , Wang Yan , Fu Li Min
Published: March 2013

Digital image processing technology applied to the field of automotive body development, especially the aerodynamic development of the external shape of automobile. This method and its corresponding software improve the efficiency compared with other traditional fluid software tools in processing the car’s front area, reduce artificial error, and have high accuracy. Digital image processing algorithms used in this article includes Image Gray, Median Filtering, Image Segmentation, Contour Extraction and so on.
Fault Tree Analysis of Vehicle Engine Lubricating Oil’s Failure
Authors: Han Qi Long , Gao Xin
Published: March 2013

Through a systematic analysis of various aspects during the process of vehicle engine lubricating oil storage, transportation and use, this paper set up vehicle engine lubricating oil failure fault tree which chose the failure of vehicle engine lubricating oil as the top event. Through the analysis of the fault tree, the minimal cut sets of fault trees were figured out based on the Boolean algebra method. Besides, the structure importance was analyzed, and thus the failure detection process was given and some preventive measures were recommended.
Research on the Simulation of Self-Synchronization of Dual Mass for Vibrating System with Two-Motor Drives
Authors: Yang Duo , Li Ye , Li He , Wen Bang Chun
Published: March 2013

The coupling dynamic characteristics of the vibrating system with dual mass are analyzed quantitatively. Through numerical computation, the effects of translation and rotation in the system regarding self-synchronization are discussed. The phase difference of two eccentric blocks is caused by the difference of the rated revolution of two motors. The stability of the synchronous operation is dependent on the structural parameters of the system. Simulation is carried out to verify that the system can be synchronized and the model can guarantee the stability of synchronization if the parameters of the system meet the conditions of synchronous implementation and stability. Simulations are also performed for the self-synchronization of two motors with different rated revolutions.
Current Situation of and Development Strategy for Non-Road Multi-Cylinder Diesel Engine with a Small Power
Authors: Liu Jin Long , Liu Sheng Ji , Wang Jian
Published: March 2013

This article introduces the development of domestic and foreign small power multi-cylinder diesel engines which are below 37kW. It analyzes the structural characteristics of foreign products and clarifies the status of domestic small power multi-cylinder diesel engines as well as the causes which limit their development. It also points out that with the tightening of the emission regulations of non-road diesel engines, We need to develop high-performance small power multi-cylinder diesel engines which are compact, energy saving and environmental friendly to meet market demands at home and abroad. Based on the status quo of the domestic industry, it illustrates the development problems of small power multi-cylinder diesel engines that deserve our attention and the corresponding technical countermeasures, and provides recommendations on the development of the domestic industry.
Optimization of Loss Models for Centrifugal Compressor Performance Prediction Based on Numerical Analysis Results
Authors: Qi Bin , Dong Su Jun , Wang Jun
Published: March 2013

An optimization of loss models for performance prediction of centrifugal compressors has been conducted in this paper. A centrifugal compressor with vaneless diffuser (VLD) and vaned diffuser (VD) is selected for the present study. The study begins with a numerical analysis, using commercial software ANSYS CFX. The numerical result is used to modify mean streamline analysis loss models. Matlab optimization toolbox is used for this purpose. Also, a matlab program is compiled to calculate the off-design performance of the centrifugal compressor. The results show that after optimizating the loss models, mean streamline analysis has a better accuracy than before.
The Evaluation for Technological Innovation Capability during Product Development of Auto Parts Enterprises
Authors: Chen Jun , Wu Ting , Huang He
Published: March 2013

Aimed at the characteristics in development of auto parts enterprises' production, the evaluation index system is built from design flexibility, patent strategy ability and project management capacity during production development, the evaluation methodology of BP neural network technology for technology innovation capability during development of auto parts enterprises’ production is used. The evaluation methodology is verified by taking the Automobile steering device company for example.
Vertical Tail Topology Optimization Design Based on the Variable Density Method with Constraint Factor
Authors: Qiu Fu Sheng , Ji Wu Qiang , Xu Hou Chao
Published: March 2013

The topology optimization design problem with multiple constraints for the complex vertical tail structure is studied in this paper. The variable density structural topology optimization method is improved by introducing a constraint factor. According to the different structural constraints and design requirements, variable factors and element pseudo density are initialized via finite element method. This method is controlled by the constraint factors, and the improved method combining with Rational Approximation of Material Properties (RAMP) density-stiffness interpolation model with optimality criteria methods (OC), the vertical tail’s stiffness optimization has been finished. The density-stiffness interpolation model, the mathematical model of variable density method with constraint factor, the structural optimization model, the solution model of the OC method, the design variables iterative format, are given in this paper and the algorithm with Matlab program is realized. Lastly, a sample vertical tail case is introduced to validate the feasibility of the algorithm by operating the results and analyzing the data.
Simulation of Microbubbles Drag Reduction on Nonsmooth Surface with Hydrophobic Property
Authors: Hu Ya Lun , Li Zheng , Xu Zhong
Published: March 2013

The friction resistance accounts for a large proportion of the total resistance, during the navigation of ships and underwater vehicles. Drag reduction techniques can significantly reduce the friction resistance of the wall and improve the speed of navigation. This paper combine microbubbles drag reduction technology and nonsmooth and hydrophobic surface technology. Building different analysis models, considering the dimples size of nonsmooth surface , the contact angle of surface and wall roughness, study the law between drag reduction and parameters of the wall by gas-liquid two-phase flow model. Under the same conditions, analysis results show that the performance of drag reduction is mainly determined by the dimple size of nonsmooth surface. The lager dimples cause stronger turbulence and loss more energy. The drag reduction effect is declined. There is a linear relationship between the drag reduction and the contact angle of hydrophobic surface. The drag reduction is enhanced by increasing the contact angle. But the principle is complicated between drag reduction and the roughness of the wall. There are different roughness to achieve the best effect under different flow velocities.
Variant Design Method of Series Products Based on Skeleton
Authors: Yang Bao Zhan , Li Chong Ning
Published: March 2013

Customers’ individual and rapid product customization demands for 2K-V series reducers are taken as the study background. The rapid modeling method of the product skeleton and the parametric design method of the product level are studied. Products’ assembly models and templates of products’ skeleton models for series products are created on the basis of analyzing the structure similarity. Through changing parameters’ values of the skeleton template the product’s assembly model can be updated automatically and this template is rapidly transformed to the product instance so as to realize the rapid variant design. The above method not only is effective to 2K-V series reducers but also has reference value to others series products’ design.
Construction of the Information Model of Ancient Architecture Components Based on BIM - A Case Study of Bracket Sets
Authors: Wang Ru , Sun Wei Xin , Zhang Xiang
Published: March 2013

Taking Bracket sets as an example, we have discussed the construction methods of BIM-based Information model of the ancient architecture components. First, to build the three-dimensional model of the bracket sets with the method of CSG, and then write the information in the model with the technology of extended data and data dictionary, and to built Information model of the ancient architecture's components, at last we have given the key code to achieve it. The information model meet the rule about the ancient buildings’ modulus, it can be used for the measurement of existing ancient buildings, the repair and reconstruction of the ancient architecture, the design of antique architecture.
The Research on Traction Simulation for a New Hybrid Power Train
Authors: Wang Guo Liang , Zhang Ji Ye , Xu Xiao Hui , Li Ming
Published: March 2013

A new hybrid power system with the “power grid-battery-ultracapacitor” was presented. The coupling relationship between the new hybrid power system and train driving was studied on the basis of considering the coupling relationship between train dynamics and the new hybrid power system. A traction simulation system was established. It could be used for traction simulation calculation on hybrid power train. It provided support for dynamics analysis of the new hybrid power train, design and optimization of the new hybrid power system and optimization of the train operation. In the end, traction simulation calculation for hybrid power train was done with actual line. The calculation results provided strong support for the development of the hybrid power train.
The Design and Implementation of Hexa-Rotor Aerial Robot
Authors: Zou Jie Tong , Huang Guan Wei , Hsu Chieh Yueh
Published: March 2013

Today, when the robot technology is booming, various sensors and intelligent functions that applied in robots can be transferred and applied to the unmanned aerial robot. It will make the unmanned aerial robot not an ordinary UAV any longer, but an intelligent robot that can fly. Conventional UAVs are not well suited for use in confined spaces, such as small passageways or indoor halls, e.t.c. The multi-rotor copters have the vertical take-off and landing (VTOL) ability for indoor flight. The most popular research topics for multi-rotor copters are Quad- copter and Hexa-copter. The objective of this research is to design and build a hexa-rotor aerial robot. We used AVR microcontroller as the flight control system, and use three-axis gyroscope and three-axis accelerometer for attitude sensing of the aerial robot; the flight altitude is estimated with barometric altimeter; the closed loop control of the aerial robot is carried out with PID control to meet the requirements, such as self-balancing, hovering and etc. Multi-sensors had been applied to the hexa-rotor aerial robot, and verified the feasibility with experiments. A universal test platform was designed to test the stability and balance of the Hexa-rotor aerial robot. An external force was applied on the aerial robot from pitch, roll and yaw direction, the aerial robot can return to self-balancing flight quickly. Finally, the hexa-rotor aerial robot can make a stable hovering during the outdoor test fly.
Development of the Escaping Programming System for Fire Environment
Authors: Su Kuo Lan , Li Bo Yi , Fong Jian Da
Published: March 2013

We present the path planning techniques of the fire escaping system using multiple mobile robots for intelligent building. The controller of the mobile robot is MCS-51 microchip, and acquires the detection signal from flame sensor through I/O pins, and receives the command from the supervised compute via wireless RF interface. The mobile robot transmits ID code, detection signal, location and orientation of the mobile robots to the supervised computer via wireless RF interface. We proposed A* searching algorithm to program escaping motion paths to guard peoples moving to the safety area using mobile robots, and develop user interface on the supervised computer for the fire escaping system. In the experimental results, the supervised computer locates the positions of fire sources by mobile robots, and programs the escaping paths on the user interface, and transmits the motion command to the mobile robots. The mobile robot guards peoples leaving the fire sources.
Design and Implementation Based on ADXL213 of the Digital Inclinometer
Authors: Bao Hong Ping , Hu Yue Xiang , Lv Ming , Zhang Jie
Published: March 2013

This paper used the ADXL213 dual-axis tilt sensor produced by Analog Device and NXP company's LPC1114/301 series microcontroller to make a digital inclinometer. The inclinometer has the advantages of reliable work and high measurement precision as well as the advantage of low cost. The paper mainly discussed the system hardware circuit design, software flow and the factors affecting the accuracy of the analysis, also proposed and implemented feasible compensation approaches, designed and manufactured a digital inclinometer in kind.
Adaptive Interacting Multiple Model Unscented Particle Filter for Dynamic Acoustic Array
Authors: Liu Ya Lei , Gu Xiao Hui
Published: March 2013

Abstract. In order to improve the tracking accuracy of 3D dynamic acoustic array to 2D maneuvering target in colored noise environment, the adaptive interacting multiple model unscented particle filter algorithm based on measured residual is proposed. The 3D motion acoustic array tracking system dynamic model is established, and initialized probability density function also is defined based on unscented transformation, after that, the measured covariance and state covariance are online adjusted by measured residual and adaptive factor, then the self-adapting capability of filter gain and the real-time capability of posterior probability density function are improved. Finally, the simulation results between different algorithms show the validity and superiority of the presented algorithm in tracking accuracy, stability and real-time capability.
Three-Dimensional Structure Trajectory Guiding Scan and Points Cloud Registration
Authors: Cai Yong
Published: March 2013

Three-dimensional visual scanning is an advanced non-contact measurement approach that can obtain a complete surface model of object. But, in the method, the local raster point cloud sets calculated must be registered to a whole. To reduce fluctuating errors and increase efficiency, we propose a new method that scanner can be moved around object guided by pre-planning trajectory of the robot. First, considering the structural parameters of the robot, the Inverse Kinematics Problem of each joint rotating function is derived, and the moving trajectory is simulated. Then, the relationship between the distances of controlled motion and data gotten by scanner is analyzed, a transform matrix which registered the local point cloud sets is deduced, the raster data can be normalized to the world coordinate by it. The experimental results show that error of registration is less than 0.09mm. The method is suited to measuring different targets in robot workspace. It can improve the efficiency and flexibility of visual measurement system.
Dynamic Analysis of Eyeball Mechanism on Android Robots
Authors: Wang Ching Kuo
Published: March 2013

Pneumatic power source has become increasingly delicate and effective in the application of tiny mechanical devices in the past few years. Advanced eyeball expression contributes much more impressions than any other facial organ on the robot skull. This paper is dedicated to self-handcraft an incentive, inexpensive, and animated eyeball mechanism on the spherical space instead of Cartesian space. The proposed biomimic eyeball module will be developed by the series-connected, pneumatically driven AI-servo actuators on the viewpoint of topology. In this paper, emotional simulations and the experiments with the data acquisition are also examined and successfully justified the advantages of the proposed innovation.
Motion Planning of Lineclimber, a Robot for Inspection of Transmission Lines
Authors: Fang Li Jin , Tao Guang Hong , Wei Yong Le
Published: March 2013

This paper presents a new dual-arms robot called LineClimber, an inspection robot for transmission lines. This robot has a kind of new-type serial-parallel combination driven joint that combine parallel flexible-wire driven mode. The work mechanism of this robot is analyzed. Based on the procedure of crossing obstacles, five elemental work modes are planned. It provides new ideas for simplifying the design of robot control system.