bluuebunny/crossref_metadata_2025 huggingface dataset:
The Optimal Structural Design of Energy Conservation and Weight Reduction Sprung Parts of Unit Aluminum Plate Curtain Wall
Authors: Han Ze Guang , Li Zhi Wei , Hao Rui Qin , Han Tao , Yang Jian Fen
Published: January 2012

In this paper, the parameter and optimal model of the sprung parts of unit aluminum plate curtain wall has been proposed, and its analysis software has also been programmed based on the APDL Language of ANSYS. The optimal dimensions of the sprung parts of unit aluminum plate curtain-wall have been obtained under the most dangerous working conditions by using our software. The goals of the automation of design, small size and light weight for the sprung parts are easily realized, and the protection of weight reduction, lower cost and less material reserve has also been gotten in the curtain wall project. It is a real Green Design.
Research Progress on Rapid Curing of Cement-Bonded Particleboard
Authors: Chen Wei Min , Li Xin Gong , Ling Qi Fei
Published: January 2012

With lots of maintenance equipments needed and high energy consumption, the traditional cold pressing process for cement-bonded particleboard has long production cycle. For the recent years, Scholars at home and abroad have made great progress in the research on fast curing process for cement-bonded particleboard, this paper summarizes the process and research status of fast curing technology for cement-bonded particleboard and propose research direction in order to provide reference for fast curing process of cement-bonded particleboard.
Interfacial Dilational Properties of Novel Crosslinking Phenol-Amine Resin Block Polyether Demulsifiers at Decane-Water Interfaces
Authors: Xie Yan Jiao , Yan Feng , Li Jian Xin
Published: January 2012

Nine novel crosslinking phenol-amine resin block polyether (PARPEmn) as demulsifier were synthesized for Shengli Oil Field. And the dilational rheological properties of absorbed film of nine different structural demulsifiers were investigated by longitudinal wavesmethod (the Langmuir trough-Wilhelmy plate technique) at the decane-water interfaces. The results show that demulsifier concentration is an important factor in controlling the dilational properties of adsorption layer. The dilational elasticity for all demulsifiers appeared a maximum value with the increasing concentration. Most important of all, the relations between interface dilational properties and demulsifier structures have been studied. It demonstrates that the interfacial dilational modulus increase with the increase the HLB value of demulsifiers.
Effect of Minor Addition of Noble Elements on Microstructure and Mechanical Properties of Ti-Based Bulk Metallic Glasses
Authors: Qin Feng Xiang , Xie Guo Qiang , Dan Zhen Hua , Inoue Akihisa
Published: January 2012

Ti-based bulk metallic glasses with minor addition of Ag, Au or Pt elements were prepared by copper mold casting. The Microstructure of the as-cast samples was examined by TEM. Nanoparticles identified as cubic Pd3Ti with crystal planes of (111), (200), (220) and (311) are observed in all the alloys modified by the minor addition of Ag, Au or Pt. The results revealed that the glassy/nanoparticle composited alloys exhibited high strength about 2000 MPa and plastic strain between 1.5-10% due to the inhibition of propagation of shear band.
Locality Sensitive Semi-Supervised Dimensionality Reduction on Multimodal Data
Authors: Zhao Zhi Kai , Qian Jian Sheng
Published: January 2012

A special kind of data is considered in this paper called multimodal data. It has the property that samples in a class are from several separate clusters. Locality Preserving Projection (LPP) can work well with multimodal data due to its locality preserving property. However, the label information is not used to improve the learning performance due to the unsupervised character of LPP. In this paper, we propose a method called Locality Sensitive Semi-Supervised Dimensionality Reduction (semi-LSDR). It takes both the discriminant information and geometry structure into account. Specifically, we construct a between-class graph on labeled samples and a nearest neighbor graph both from the perspective of locality. A directly mapping can be achieved by solving a generalized eigenvalue problem. Effectiveness of the proposed method is showed through simulations with benchmark data sets.
Studies on Locational Variation of Shear Properties in Cortical Bone with Iosipescu Shear Test
Authors: Sharma N.K. , Sehgal D.K. , Pandey R.K.
Published: January 2012

Bone material is very complex in nature due to its anisotropic and hierarchical structure. Bone is weaker in shear as compared to tension and compression therefore shear properties of bone material are important to find out. Many researchers have applied different techniques to find out shear properties of bone material but these techniques either require such type of bone specimens which are difficult to prepare or provides limited information about the shear properties. Iosipescu shear test method has been applied in the present work to find out locational variation in shear properties of cortical bone. This technique seems to be very effective for the case of bone material and require less effort as compared to the other techniques applied by the other researchers in the previous reports.
The Simulation Analysis of Mobile Phone Back Cover Injection Molding Based on Moldflow
Authors: Liu Ling , Wang Liang
Published: January 2012

Along with the rapid development of electronic communication technology and the widely application of mobile phones, it is required to shorten the production period ,to lower production cost and to increase the competitive power. The traditional design method obviously cannot satisfy the requirement of production, but the application of Moldflow software can solve it ,which can analysis the product structure reasonably, to realize the optimization design of the parts; which can formulate rational production process parameters, such as the filling time and the holding time etc; which can analyze the warping ,bubble, lack of material common defects ,to optimize mold design; which can design the die structure, such as reasonable pouring system,to shorten the cycle of mold design ,to reduce production cost and enhance the competitiveness of enterprises.
Research on Periodic Motion Stability of Multi-DOF Rotor-Bearing System with Crack Fault
Authors: Li Chao Feng , Li Qin Liang , Liu Jie , Wen Bang Chun
Published: January 2012

Multi-DOF model of double-disc rotor-bearing system taking crack and oil film support into account is established, and the continuation shooting method combined with Newmark is also applied to stability analysis of continuous system. This paper mainly studied the variation law of five parameters domain in crack depth and location, then a number of conclusions are found: first, it’s feasible to study the stability of nonlinear rotor-bearing system with crack faults using FEM; secondly, the crack depth and location has a certain impact on instability speed, but the impact is not great and owns its certain law. As the crack depth and location is getting close to the middle position of rotor, due to its impact on the oil film support, the instability speed of system increases. This method and results in this paper provides a theoretical reference for stability analysis and vibration control in more complex relevant rotor-bearing system with crack fault.
Analysis on Bus Seat Size Design Based on Ride Comfort
Authors: Liu Xiao Bin , Wang Feng Yuan
Published: January 2012

The analysis on the physiological characteristics of the human body posture was carried out with the ergonomic principles from the perspective of human anatomy and physiology. The requirement for the structure and size of the passenger seat was discussed from the point of passenger comfort. Several design problems were analyzed with some recommendations for improvement.
Weathering of Light Metals in the Atmosphere
Authors: Dan Zhen Hua , Muto Izumi , Hara Nobuyoshi
Published: January 2012

High purity aluminium and magnesium were exposed in the field. The meteorological data showed that the dew point remained at a constant level in the short period. The time dependence of corrosion mass loss of aluminium followed a logarithmic law, and that of magnesium did a linear law. The constant dew point corrosion test (CDPCT) was employed to investigate the effect of chloride deposition rates and dew points. Aluminium was insensitive to the change of chloride deposition rates and dew point. Magnesium corroded more in higher chloride deposition rates and lower dew points. The corroded surface area of aluminium slightly changed with exposure time, and that of magnesium increased gradually.
Study on Fatigue Strength of Trimaran Cross-Deck Structure Based on Spectral Method
Authors: Zhen Chun Bo , Ren Hui Long , Feng Guo Qing , Li Chen Feng
Published: January 2012

The stress concentration of trimaran’s cross-deck structure is serious and the problem of its fatigue strength appears particularly important. In this paper, the responses of ship motion and hydrodynamic pressure on ship’s surface in regular waves are calculated using 3D linear potential flow theory, then the stress responses of the hot-spots in regular waves with different wave angles are evaluated by finite element analysis of the global trimaran structure. Based on linear cumulative damage theories, the fatigue damage is calculated according to the direct calculate method used spectral analysis. The result can offer the reference for the trimaran’s design and development.
RV Reducer Backlash Analysis Based on Robust Design
Authors: Li Yong Hua , Li Wei , He Wei Dong
Published: January 2012

The RV reducer backlash is well controlled by means of robust design. Some factors influencing backlash are analyzed and divided into controllable factors and uncontrollable (noise) factors. The requirements for experimental factors are met for robust design. The experiment analysis is proposed by using orthogonal experiment and G.Taguchi robust design for each of effecting backlash factors. The optimum parameters are obtained for maximum signal noise ratio (SNR). The contribution rate for each factor influencing backlash is presented. Finally, RV reducer’s backlash is well decreased and achieved ideal result.
A Maturity and WBS Based Working Mode of Aero-Engine
Authors: Zhao Jie , Jin Ye Tao , Zhang Ding Hua
Published: January 2012

For the purpose of improving the capability of multi-disciplinary collaborative design process of domestic aero-engine, a novel methodology of optimized work breakdown structure based on the concept of maturity is proposed on this paper. The definition of maturity and the key factors of maturity are given firstly, and then a working mode of breakdown structure based on maturity is detailed. A sample of compressor of aero-engine is demonstrated on a re-developed TeamCenter platform.
Applied Research on Natural Human-Computer Interaction in the Modern Design
Authors: Wang Yao Kun , Hu Wei Ping
Published: January 2012

In the area of modern product design, there is a tendency of adding increasing intelligent element, however, users may encounter problems in using products. Originally, designers may want to solve the problem better, but they just went to the opposite side. We need a very natural form of interaction, this interaction can be easily occurs in the subconscious. Natural interaction is the exchange of implicit, natural sound and time, a signal quiet but can be detected, and there are displays of products and layout to the real world with the corresponding natural. We follow this principle in product design, in order to make our products more emotional, more user-friendly, and it will also allow us to enjoy products’ greatest value.
Fuzzy Error-Tolerance Biometric Identity-Based Signature in the Standard Model
Authors: Zhang Le You , Wu Qing , Hu Yu Pu
Published: January 2012

Biometric measurements are noisy and the existing techniques cannot be used directly to construct biometric-based scheme. Hence an error-tolerance property(Fuzzy) can be used to solve this problem. In this paper, a new biometric identity based signature scheme is proposed with the error-tolerance property. Our scheme is constructed in the standard model and achieves the selective identity security. In addition, the security of our scheme is reduced to a natural assumption-Computation Diffie-Hellman(CDH) assumption instead of other strong assumptions.
A Comparative Study on the Effectiveness of Lightweight Shipborne Underwater Vehicle Based on Certification Position
Authors: Xie Yong
Published: January 2012

For the operational effectiveness comparison of lightweight shipborne underwater vehicle,establish and implement anti-ship underwater vehicle’s and two types of lightweight shipborne underwater vehicle’s trajectory and hit probability model,proposed the method of certification position for lightweight shipborne underwater vehicle,given the operational effectiveness calculation model.Finally,through the practical example of two types of lightweight shipborne underwater vehicle’s operational effectiveness comparison.The calculation results testify that this method is feasibility and effectiveness.The research is of great reference value for the assess different types of lightweight shipborne underwater vehicle.
Analysis of Stagnant Non Condensable Gases Effects on Condensation Heat Transfer in a Vertical Tube
Authors: Zhang Jun Xia , Li Zeng Sheng , Gong Bin Yao , Zhao Hong Xing , Zhao Yu Huai
Published: January 2012

In a vertical condenser tube installed at the cold end of a non-vacuum separate type heat pipe, non condensable (NC) gases in the system is pushed by continuous vapor flowing from the hot end into the condenser tube at the cold end, gathering above condensate at the outlet of the condenser tube. Therefore, condensation heat transfer of vapor with the stagnant NC gases occurs in the condenser tube. It is necessary to comprehend the effects of stagnant NC gases on condensation heat transfer. A VOF method was adopted to analyze how stagnant NC gases affect condensation heat transfer, a mass fraction equation of NC gases was used to solve diffusion between NC gases and vapor, a Hertz-Knudsen-Schrage model was applied to deal with condensation rate of vapor on the surface of liquid film. Parameters, including volume fraction, velocity, pressure, mass fraction of NC gases and condensation heat transfer coefficients (HTC), were obtained. Results show that a lot of NC gases deposits in the condenser tube rear, leading a lot of vapor to condense at the condenser tube front. NC gases slightly affect condensation HTC of the tube front, and severely degrade condensation HTC of the tube rear. Furthermore, an increase in mass of NC gases causes a rise in pressure and velocity, improving condensation heat transfer.
Study on Properties of HVAS Waste-Oil Equipment Coating
Authors: Chen Bin , Liu Ge , Zhang Xian Ming
Published: January 2012

Takagi-Sugeno (T_S) fuzzy model of abrasion resistance of HVAS coating and technological parameters is proposed. The results of identification and simulation of the model show that the identified fuzzy model has relatively high precision and good generalization ability; the identification method is valid. By the use of the model, analyzed influence on properties of HVAS coating with technological parameters.
Research on Existences and Concept System of Rotation Symmetry in Mechanical Systems
Authors: Ma Zhi Yong
Published: January 2012

Rotation symmetry is a basic type of mechanical static structure symmetry, and plays an important role in mechanical systems. Based on collecting and analyzing rotation symmetric instances, the concept system of rotation symmetry classified by the directivity of symmetry components, the rotary type of symmetry components, the alternations of symmetry components, the distributing integrality of symmetry components and the type of symmetry benchmark was established, and was explained and verified by accurate instances. The concept system of rotation symmetry can offer the academic basis to the further research on the existent type, the application methods and the application laws of rotation symmetry in mechanical systems.
Nonlinear Initial Alignment of Strapdown Inertial Navigation System Using CSVM
Authors: Wang He Nian , Yi Guo Xing , Wang Chang Hong , Guan Yu
Published: January 2012

According to the situation that the statistical characteristics of noise in initial alignment of sins of UKF filter is not agree with actually, the filtering precision will severely reduce or even divergent, a combination of support vector machine method of initial alignment is proposed. In this paper, the test samples are split into four groups. Three groups are trained for the first layer and the last group is trained for the second layer of support vector machine. The first layer is a group of support vector machine in parallel computing, the second layer is an information fusion of the single support vector machine in the first layer, and combined support vector machines. In this method initial alignment of strapdown inertial navigation system is achieved. Finally through the UKF filter, SVM, CSVM simulation contrast, the results show that CSVM has an improvement than a single SVM, better real-time than UKF filter and generalization ability.
A Complex Product Machining Process Capability Performance Improvement Method
Authors: Zhu Fang , Huang Xiong Fei
Published: January 2012

The main idea of this paper is to calculate the entire process capability of the Complex Product Machining Process (CPMP) based on modified tradition process capability index and then further decide the improvement orientation and size to individual process parameter through sensitivity analysis. We illustrate the method by a three-stage machining process. The results have shown that the proposed method could significantly improve the process capability.
Study on Operation Monitoring System Used by Battery Electric Vehicle
Authors: Tang Li Hua , Gao Tie Jun
Published: January 2012

According to the management need of Battery Electric Vehicle, compose built to be based on GPS+GPRS Battery Electric Vehicle intelligent monitoring system. The system includes communication module, GPS+GPRS intelligent monitoring system software and monitoring vehicle. Based on the operation characteristics of pure electric vehicles and electric vehicle battery in performance analysis, put forward the pure electric bus operation monitoring system design, and through the Web Service technology combined with VB.NET, MapInfo, Mapx and Iocomp controls with GIS technology to achieve the monitoring software interface design, and the collection of data for real-time monitoring, for the development of Battery Electric Vehicle operation system to provide strong technical support.
Distributed Virtual Control and Simulation Based on VNC and RFB Protocols
Authors: Lu Xiao Lin
Published: January 2012

The distributed virtual control and simulation has been investigated collaborative compute environment. The VNC and RFB protocol is a thin-client computing model for setting up a cooperative environment. This paper proposed a WSRFB Protocol to construct a distributed virtual control and simulation environment with shared remote program. The distributed virtual control can simulate the window generated by the distributed virtual control and simulation software. The algorithm successfully applied it in the telecommunication network management system integration. The results and experiments demonstrated that the WSRFB protocol could offer a great flexibility simulation environment.
Research on Data Fusion Technology in WSN
Authors: Zhang Wen Chao , Liu Yu Zhen
Published: January 2012

Wireless Sensor Networks is a novel technology of information acquisition and processing. It integrates the technologies of sensor, wireless communication, and microelectronics. It can sense and collect environmental parameters in the range of the network, and then process the parameters cooperatively in real time. We discuss the design principle and performance evaluation method of the data fusion algorithm for wireless sensor networks in detail. We introduce the concept of fusion cost, and emphasize that the data fusion algorithm in wireless sensor networks must be combined with specific application background. Finally, we emphasize the proposed algorithm which combined reduced-rank filtering with adaptive weighted. The fact that it can effectively eliminate the effect of abnormal noise on fusion performance is illustrated through examples. The results showed that this algorithm occupies obviously the advantage in the aspect of fault-tolerant ability.
Experimental Research for Residual Strength of Composite π Joint
Authors: Fu Yue , Zhang Jian Yu , Zhao Li Bin
Published: January 2012

All composite π joints, which can minimize structure redundancy and pave the way for much reduced assembly time, have been developed as a great achievement of the integrated structure technique. To obtain knowledge about the mechanics behavior of composite π joints after cycle loadings, especially residual strength, cycle fatigue test and tensile test for the joints are conducted. From this study, some significative remarks can be made: the strength of composite π joint has reduced slightly by fatigue crack; the residual strength and the general rigidity of the joint exhibit large scatter; the filler zones and tip zones are those of potential weakness in the joints, and the sample in residual strength test has similar failure patterns with that in static tensile test.
Coverage Optimization Methods in Wireless Homo-Sensor Network Based on Guided Swarms
Authors: Zheng Huan Yang
Published: January 2012

An improved particle swarm optimization (PSO) algorithm is designed for the grid based wireless homo-sensor network position problem. The proposed method, called guided method, introduces the simulation of migration process to PSO and its mutation algorithm, using a previous designed sparse position plan to guide the swarm to the optimization solution, and accelerates the search process. Experiments show not only the feasibility and validity of the proposed method but also a marked improvement in performance over traditional PSO.
Study of the Crane Comprehensive Evaluation Index System
Authors: Huang Qi Lu , Wang Xin , Li Rui Jie , Gao Shun De
Published: January 2012

Scientific and practical crane evaluation index system is expected to obtain by screening of indices in this paper. The initial comprehensive evaluation indices are selected by stratification. Then the quantitative indices are screened by entropy method and Pearson correlation coefficient method, and the qualitative indices are screened by Delphi method and Spearman correlation coefficient method. The little effect indices on the evaluation result are deleted and the redundant information between the indices are got rid of. The index system simplified is comprehensiveness and representative, which is convenient to compare and evaluate cranes.
Copper Plating on the Carbon Fibers by Double Pulse
Authors: Gao Song , Fan Ming Jie , Wang Gui Ping
Published: January 2012

The effects of positive and reverse working time, electroplating time, current density, duty cycle on the weight-gain rate were investigated. The optimized technical parameters were as follows: room temperature, 300 ms of positive working time, 30 ms of reverse working time, 40% of duty cycle, 8.20 ×10-5 A/mm2 of current density, 6 min of electroplating time. The quality of copper coating was checked with SEM. The adhesion between the coating and carbon fibers was tested by the method of psychro-thermal cycles. Additionally, comparison to pulse plating and direct current plating was made. The obtained results showed that a flat, detailed and well-crystalloid copper coating on the carbon fiber surface was obtained with the present conditions. The adhesion between the coating and carbon fibers was 450kPa.
The Novel Heating Method for the Sample of Spectral Emissivity Measurement
Authors: Xing Li , Yuan Zun Dong , Guo Min Chen , Wei Dong , Cai Li Zhi , Wang Bo Ping
Published: January 2012

In order to eliminate the temperature difference between center measurement points and surface temperature of the material samples with low thermal conductivity, this paper introduces a new hot airflow double-sided heating method for sample, and describes its principle, application, and the impact of the existing and novel methods on the measurement results of spectral emissivity. Also, we analyze and compare the results of two different samples obtained with these two heating methods. The new method for material samples with low thermal conductivity has outstanding advantages and potential applications.
Foreign Objects Damage on the Leading Edge of the Blade with Centrifugal Preload
Authors: Yin Dong Mei , Li Zhen Xiao
Published: January 2012

The influence of centrifugal prestress on the foreign object damage of engine blades was analyzed by numerical simulation. A nonlinear dynamic model for foreign object damage of blade with centrifugal prestress was established. And the dynamic relaxation method was used to obtain the initial stress and displacement field of blade in the beginning of the dynamic analysis of impact. Numerical simulations of foreign objects impacting on the leading edges of the blades under different centrifugal preloads were carried out. The results indicate that the local plastic deformation on the impact location of blade with centrifugal preload, which is produced at the moment of impact, is decreasing with the increase of the preload. The growth of crack produced on the lead edge of blade is accelerated with the preload increasing.
Electroless Plating Nickel Film on Surface of Epoxy Resin and Evaluation of its Electromagnetic Shielding Effectiveness
Authors: Jin Peng , Dong Shi Yun , Xu Bin Shi , Song Zhan Yong
Published: January 2012

Nickel coating was prepared on surface of Epoxy Resin plate by electroless plating process. Surface and section morphologies of the coatings were observed by scanning electron microscopy (SEM) and metallographic optic microscopy. Electromagnetic shielding effectiveness was evaluated via flanged coaxial electromagnetic shielding effectiveness tester. The results showed that the surface of the nickel coating prepared by electroless plating process was smooth, and its structure was fine and compact. The electroless deposition rate of the nickel coating reached at 12μm/h. In the frequency range of 300 kHz to 100MHz the electromagnetic shielding effectiveness of the nickel coating was above 60dB, and in the frequency range of 100MHz to 1.5GHz the electromagnetic shielding effectiveness of the nickel coating was above 44dB.
The Role of Dissolved CH4 in Soil Solution in the CH4 Emission from Water-Saving Irrigated Rice Fields
Authors: Li Dao Xi
Published: January 2012

To examine how the dissolved CH4 in soil solution would affect the CH4 emission from rice field, fluxes of CH4 emission were measured by using a manually closed static chamber-gas chromatography method, and the dissolved CH4 in soil solution was obtained through shaking soil solutions, which were extracted from different paddy soil layers by a soil solution sampler with suction and pressure. The results show that the CH4 fluxes from rice fields and the concentration of dissolved CH4 in soil solution are both reduced significantly under the water-saving irrigation as compared to the traditional flooded irrigation. Under the water-saving irrigation, naturally receding water-layer during the early stage leads to an earlier peak of CH4 flux, but dramatically reduces the concentration of dissolved CH4 in soil solution. The maximum concentration is shifted to about 20-cm depth soil layers, and the relationship between CH4 emissions and dissolved CH4 in soil solution can be estimated using an exponential function of dissolved CH4 in soil solution at the depth of about 20 cm (R2＝0.89, p4 in soil solution plays a more dominant role in CH4 emission under the water-saving irrigation than that under continuously flooded irrigation.
Comparison and Improvement for PWM Output Circuit
Authors: Guo Li , Wang Xi Ping , Li Wei , Yang Yu Min , Fan Man
Published: January 2012

The switch power amplifier is widely used in magnetic bearing system, the lab uses pulse width modulator TL494 which is produced by U.S. Texas instruments company to drive power tubes. It can generate PWM signal. In this paper, a three level half bridge switch power amplifier is designed based on TL494.The original design of the double op-amp circuit is analyzed and improved through analyzing positive input signal for the internal error amp of TL494. Removing the redundant circuit, the new signal input circuit can realize the same function as the double op-amp circuit and the circuit structure can be more compact.
Control System Design for AC-DC Three-Degree-of-Freedom Hybrid Magnetic Bearing
Authors: Zhang Wei Yu , Ruan Ying , Diao Xiao Yan , Zhu Huang Qiu
Published: January 2012

To fulfil the objective of high speed, high precision and intelligence in the modern equipment and advanced manufacturing industry, the magnetic bearing is requested to have small volume, low cost and low consumption. In this paper, an AC-DC three-degree-of-freedom hybrid magnetic bearing (AC-DC-3DOF-HMB) is studied, which integrates radial bearing and axial bearing in one of the magnetic bearing. The configuration and principle of AC-DC-3DOF-HMB are expounded, and the mathematical models of suspension forces are given. Then based on the function block diagram of AC-DC-3DOF-HMB control system, its hardware and software configuration are designed. The experiment results show that the rotor can be suspended stably with three degrees of freedom and has a good performance in anti- interference, and the feasibility of the control system design can be verified.
Research on Single Neuron Adaptive PID Control
Authors: Zhang Yan Hong , Zhao De An , Zhang Jian Sheng
Published: January 2012

As a branch of the intelligent control, neural networks is applied in control more and more widely, the single neuron adaptive PID control algorithm is studied in this paper, and the program is written by MATLAB, the common object of single neuron adaptive PID is simulated, and the effect of single neuron adaptive PID control parameters on control effect is analyzed, experimental results show that the single neuron PID control has more obvious advantages than general PID control.
Study on Applying Component Methodology in Developing Computerized Adaptive Test System for College English
Authors: Zheng Ying , Zheng Shi Liang
Published: January 2012

In the context of software reusing, component-based Software development is an emerging paradigm of development methodology. This paper studies how to apply this methodology in developing a Computerized Adaptive Test (CAT) system for college English. It describes the whole system architecture and gives some detail of Components Modeling Procedure and component repository design. The whole development process can provide valuable reference for CAT system for other disciplines.
Study on Numerical Control Machining Technology of Toy Car Cover
Authors: Wan Jin Gui , Wang Xi Ping , Ding Wei , Li Wei
Published: January 2012

Based on UG II CAD/CAM system, the CNC machining process and technology of a toy car cover is studied in this paper. It includes three-dimension (3D) modeling, machining programming, fixture design and manufacturing, process parameter setting, tool path planning and editing, NC code generation (post processing), simulation processing, and practical machining. The part is manufactured successfully in a 3-axis CNC milling machine. It has a desirable shape and high accuracy. The result shows that, with the powerful CAD/CAM capabilities of UG, the integrated design and manufacturing of complex curved surface shell part is easy to implement, the process is reasonable and efficient, and the NC program is reliable. This exmple fully reflects the advantages of UG CAD/CAM integration technology. The method and technology introduced in this paper can provide valuable reference for processing of similar parts.
A Study on the Relations between Chinese Commercial Chambers and the Government
Authors: Peng Fu Qi
Published: January 2012

The less-ideal statement between Chinese commercial chambers and Chinese government holds back more/deeper development in commercial chambers. Based on a few basic theories such as public management, non-profit organizations and entrusted agent, this article draws lessons from the practice in developed countries and analyses the relations between commercial chambers and the government in China. It also puts forward some suggestions of corresponding measures in perfecting and creating the relations between the two sides.
Influence of Suspension Mass Variation on Dynamic Characteristic of Magnetic Suspension System
Authors: Wang Xiao Guang , Mei Bin , Sha Feng , Zhou Xin
Published: January 2012

Magnetic suspension system is nonlinear and unstable essentially. It is according to the principle of nonlinear system having same topological structure near the operation point with the linear system that linear control arithmetic for a nonlinear system is adopted. The system is easy to lose stabilize and diverge when subjected to interference or system parameters variation. Suspension mass is a key parameter of a magnetic suspension system and suspension mass variation has great influence on the dynamic characteristic of a magnetic suspension system. The influence of suspension mass variation on the dynamic characteristic of a magnetic suspension system under the PID control condition is discussed. The relationship between dynamic characteristic and structure as well as control parameters of the magnetic suspension system is reached by means of experimental method.
Investigation of Tool Failure Modes and Machining Disturbances Using Monitoring Signals
Authors: Popa Andrei , Dessein Gilles , Baili Maher , Dutilh Vincent
Published: January 2012

The ACCENT Project (FP7-AAT-2007-RTD-1) will allow the European Aero Engine manufacturers to improve their competitiveness by applying adaptive control techniques to the manufacturing of their components. For the critical rotating parts of aircraft engines, the surface integrity generated after machining is a key factor on the life cycle. In this context, one particular attention has to be carried out on tool condition. The aim of this paper is to define a monitoring approach able to detect the tool condition and machining disturbances. The main failure modes characterizing this particular Nickel base drilling and the apparition of embedded chips over the machined surface were identified. By experimental techniques, cartography of failure modes was performed. The results show that flank wear and notch are the main failure modes limiting the tool life. For some cutting conditions, the tool failure occurs after the first hole due to the important cutting forces. Some interesting combinations are made between the spindle current/accelerometers/ thrust force and flank wear, tool breakage and notch. Before these correlations, a detailed signal analysis was performed, considering different disturbing phenomena, such as chips evacuation problem. Finally, a “synopsis” for process monitoring is proposed, considering the analyzed phenomena.
Performance Evaluation of Multiple Regression Method for Identification Models: Application to the Sheet Metal Forming Formability
Authors: Nasri Mohamed Toumi , Faouzi Slimani , Ayadi A. , Cherouat Abel , Rezgui Mohamed Ali , Zghal Ali
Published: January 2012

The studies on the development and profitability of forming processes of thin structures, plastic deformation, continue to grow. Their goals are the prediction and assessment of default risks incurred by parts manufacturing phase. The quality of numerical predictions depends on the accuracy and reliability of the models selected. This justifies the development of different techniques for the identification of skills forming sheets and tubes. This study fits within this frame work, a method of identifying the coefficients characterizing the elastoplastic damage behavior of sheet metal based on the analysis of variance (ANOVA) was developed. Performance evaluation of the ANOVA analysis has been conducted through a confrontation of results with those identified by the inverse method.
Strain Hardening Law Coupled to Damage and Remeshing Procedure Application to Sheet Hydroforming Processes
Authors: Faouzi Slimani , Cherouat Abel , Ayadi A. , Rezgui Mohammed Ali
Published: January 2012

In this study, we present an experimental/numerical methodology which aims to improve 3D thin sheet hydroforming considering coupled constitutive equations formulated in the framework of irreversible processes accounting for isotropic hardening as well as isotropic ductile damage. The experimental study is dedicated to the identification of stress-strain flow from the global measure of pole displacement, thickness evolution and internal pressure expansion. Indeed, Hill48 yield surface anisotropy parameters and coefficients of the Swift law coupled to ductile damage allowing to locate plastic instability zones of hydroformed sheets are identified with three dies cavities shapes. Or during the hydroforming processes severe mesh distortion of element occur after a few incremental steps. Hence an automatic mesh generation with remeshing capabilities is essential to carry out the FEA. The proposed technique based on geometrical criteria includes adaptive refinement and coarsening procedure is integrated in a computational environment.
Research of the Measurement Technique for the DC Motor Sensorless Control
Authors: Peng Er Bao , Zhang Hong Ge , Wang Hong Ying
Published: January 2012

Back-EMF zero-crossing detection can detect motor rotor position. The motor start-up problem of sensorless detection technique motor is researched. A novel three-stage start-up method is proposed to solve the problem. And it can ensure Security and reliability of motor start-up and controllability of motor rotation. There is actual theoretical basis for implementing measurement control system for the DC motor sensorless control.
Non-Isolated High Step-up DC-DC Converter with a Coupled Inductor
Authors: Do Hyun Lark
Published: January 2012

A non-isolated high step-up DC-DC converter with a coupled inductor is proposed in this paper. The proposed converter provides high voltage gain and soft-switching operation of all semiconductor devices. A voltage doubler and a coupled inductor increase the voltage gain. Zero-voltage-switching (ZVS) of all switches and zero-current-switching (ZCS) of all diodes are achieved. Also, the voltages across the semiconductor devices are effectively clamped. Due to the soft-switching operation of all switching devices, the switching loss is significantly reduced and the high efficiency is obtained. The feasibility and performance of the proposed converter were verified on an experimental prototype
Optical Navigation Satellite Constellation Design
Authors: Ao Jun , Wu Yi , Ma Chun Bo
Published: January 2012

Satellite constellation has incomparable superiority compared to the single satellite, and can provide effective global intermittent or continuous coverage. This paper designs a laser navigation satellite constellation by simulating the coverage properties of single satellite. The running track of the satellite constellation covers the specified area and provides intermittent navigation information for mobile platforms.
Optical Character Recognition of Postmark Date Based on Machine Vision
Authors: You Fu Cheng , Liu Ying Jie
Published: January 2012

For the purpose of information management on postmark according to the date, the paper put forward a method of postmark date recognition based on machine vision, which could meet the demands of personal postmark collectors. On the basis of the relative theories of machine vision, image processing and pattern recognition, the overall process is introduced in the paper from postmark image acquisition to date recognition. Firstly, threshold method is used to generate binary image from smoothed postmark image. So region of date numbers could be extracted from binary image according to different region features. Then regions of date numbers which are connected or broken could be processed through mathematical morphology of binary image. Individual regions of date numbers are obtained for recognition. Finally, classification and pattern recognition based on support vector machine make date numbers classified and date recognition is implemented correctly
Detection Technology and Application of SpO2 Based on Dual Wavelength System
Authors: Zhao Qing Xin , Zhang Dong Xia , Ji Xiu , Zhao Liang , Wang Hui
Published: January 2012

With the development and progress of the society, people's physical health is getting higher and higher. Enjoy superior in material life and all kinds of disease of heart head blood-vessel also shows high trend. To solve these problems are involved in one of the important parameters- the blood oxygen saturation of body. For application object and environment, The author used fixed double wavelengths red light infrared collection principle. On the premise of not traumas continuous real-time detection.The research, with AT89S52 SCM as cybernetics core, analyses each unit of the structure function and the realization methods and completes commissioning of hardware system .The research,with AT89S52 SCM as cybernetics core, analyses each unit of the structure function and the realization methods and completes commissioning of hardware system. The way can erasure reliability and anti-interference, but also reduce the cost of instrument, in order to fulfill the demand of public. tests show that: this device has speedily test, high sensitivity and accuracy to the requirements of experiment calibration
Research on the Design of Windshield Inspection Gauge Based on WAVE Technology
Authors: Zhou Lin Zhen , Ji Cong Dong , Jiang Qiang , Tao Jie
Published: January 2012

The design, manufacturing and inspection quality of windshield inspection gauge is of great importance that greatly affects the competitiveness of the product. This paper proposed a WAVE-based windshield inspection gauge design technology and the characteristics of WAVE technology was explained in detail. The key techniques of WAVE application was described on the base of the analysis of the implementing steps of technology. Finally, under the framework of WAVE-based product design, a design case of clip board was employed to demonstrate the feasibility and effectiveness of WAVE-based windshield inspection gauge development.
DNA Addition Algorithm Based on Molecular Beacon
Authors: Huang You Rui , Wang Jing , Tian Xiao Min
Published: January 2012

A new DNA computing model to realize binary integer additions based on molecular beacon is described in this paper. The binary 0 and 1 are represented by two different fluorescent states of a molecular beacon since its two different structures. By designing sequences of molecular beacons skillfully, and using the relationship between each two corresponding bits and their result and carry bit of two operational numbers, the computing process to compute each two corresponding bits of the binary numbers is simulated in the test tube. Finally, the results can be read only by detecting whether the fluorescence in tube emits. The result of the experiment shows that the algorithm is simple and convenient, and the algorithm provides a new idea for DNA computing to realize arithmetic operations
The Implementation of PCIE Image Transmission Board
Authors: Li Dong Yang , Wu Qiang , Liu Qing Shan
Published: January 2012

This article discusses the Image Transmission Board which based on Virtex-5 FPGA, it achieved PC transmission data through PCIE Bus. This system refers to the example of DMA transmission which provided by XILINX company, it use DDR2 memory to cache data. This board could provide Windows system use WDM driver to interact with hardware resources. The data transmission rate of FPGA is 1.5Gbit/s
The Study on Combustion Mechanism of Methanol and Diesel Micro-Emulsion in Engine
Authors: Zhou Qing Hui , Li Qing Bo , Ji Wei
Published: January 2012

Based on S195 diesel engine, the cylinder pressure of different methanol and diesel micro-emulsion were mea sured, and Chemical Kinetic was analyzed. The result showed that the max combustion pressure was added and the heat release was reduced by the methanol increase. The reason was that the different methanol content could effect the combustion process product such as CH2O，H2O2，O，OH，H, and effect ignition delay period and combustion duration period, and accordingly effect power and emission.
Digital Single-Phase Thyristor AC Voltage Regulator Research Based on Fuzzy PID and APF Control
Authors: Li Feng Xiang , Chuan Gu
Published: January 2012

In the APF system, PWM control plays an important role in improvement of power quality and harmonic compensation. Given the current PWM control method assumes DC voltage as constant. So the APF operating loss and energy exchange among system components cause the DC voltage the certain fluctuation which deteriorates the effect of harmonic compensation. This paper presents an improved PWM method which uses the designed fuzzy PID controller to control the deviation between the calculated voltage and the set one, adjust the size of the duty cycle to modify PWM waves, and make the output stability in the new set-point. Finally, it shows the simulation results in this paper. This improved PWM approach makes the AV output to avoid the influence from the DC fluctuation, and obtains the ideal harmonic compensation effect
New Construction Technique Applied in Super High Rise Concrete Structure - Wanxin Building in Shenyang, China
Authors: Dong Ying Na , Yin Su Hua
Published: January 2012

The current development of concrete structure tends to mass concrete structure and superhigh concrete structure. But construction quality for ultrahigh concrete structure is difficult to be controlled due to its disadvantages such as large volume, high strength, complicated structure and difficult construction etc. This paper elaborates the key construction technique of concrete filled steel tube composite column and concrete structure applied in ultrahigh concrete structure—Wanxin Building in Shenyang, China, which can provide a useful reference for construction quality control of relevant concrete projects.
Study on a Practical Case of Cleaner Production Audit
Authors: Su Rong Jun
Published: January 2012

Through the extensive research and deep analysis of existing problems in cleaner production, four middle/high expense plans were set forth, demonstrated and implemented. These four implement plans included high efficient steam traps, energy saving system of steam boiler, improved sewage treatment facilities and vacuum raw material feeder. The total investment was 330 thousand Yuan RMB. The annual discharge of waste water was reduced by about 30 thousand tons and annual economic profit was 680 thousand Yuan RMB. Moreover, better environmental and social benefit was created. More importantly, a sustainable cleaner production mechanism was established for the factory.
Simulation and Research of Heating Load about Residential Construction Based on Zhengzhou
Authors: Zheng Hui Fan , Wu Jian Bo , Huang Lan Yu
Published: January 2012

With a typical residential construction in Zhengzhou, basing on the DEST software, a residential building load calculation program has been established. The hourly heating load has been simulation calculated about the residential construction, and the load distribution characteristics has been analyzed basing on calculation, it is found that daily maximum heating load is mainly concentrated on between 6:00 to 8:00. Through the load distribution that the proportion of part-load operation can reach to 75% or more, and the study provided technical support for the controlled program about the winter air-conditioning system