bluuebunny/crossref_metadata_2025 huggingface dataset:
Design and Assessment of a Flexure-Based 2-DOF Micromanipulator for Automatic Cell Micro-Injection
Authors: Tang Hui , Li Yang Min , Huang Ji Ming , Yang Qin Min
Published: February 2012

The design and assessment of a flexure-based parallel micromanipulator with two-degrees-of-freedom (2-DOF) for automatic cell injection is presented in this paper. The design and modeling of the micromanipulator are conducted by employing compliance matrix method. The dynamic modeling and analysis via Lagrange equation are conducted to improve the bandwidth of the mechanism. Both theoretical analysis and finite element analysis (FEA) results well validate the good performance of the micromanipulator which will be applied to practical cell manipulations.
Wavelet Ridge Analysis of Lamb Wave
Authors: Chen Xiao , Xu Kai
Published: February 2012

Lamb wave has important application value in material nondestructive testing. It is a kind of ultrasonic guided wave propagating in thin plate material. It has the dispersion characteristic, which greatly limits its wide application in material evaluation. After continuous wavelet transformation, we extract the feature of ridge of Lamb wave signals by adopting crazy climber algorithm. Experimental results show that Lamb wave after transmission of a certain distance has the characteristics like asymptotic signal. The ridge can reflect the dispersion characteristic of Lamb wave.
Innovative Design of GFRP Bars for Concrete Structures
Authors: Almerich-Chulia Ana , Martin-Concepcion Pedro , Molines-Cano Jose Miguel , Rovira-Soler Juan
Published: February 2012

This part analyzed GFRP rebar’s research situation, summarized its behaviuor as internal reinforcement for concrete structures. The research has been developed over recent years, however the rules and standard codes for design RC concrete structures with these rebars not consider that the internal reinforcement can work in compression. This paper presents the development of the research to get a new kind GFRP rebar for work as internal reinforcement of concrete structures, with an innovative design for work both in tension and compression, and their mechanical properties: strength, bond,…
Enhanced Electrochemical Hydrogen Storage Characteristics of the as-Spun Mg2Ni-Type Alloys by Substituting Ni with M (M=Cu, Co)
Authors: Zhang Yang Huan , Li Bao Wei , Ren Hui Ping , Pang Zai Guang , Hou Zhong Hui , Zhao Dong Liang
Published: February 2012

Mg2Ni-type Mg20Ni10-xMx (M=Cu, Co; x=0, 1, 2, 3, 4) electrode alloys with nanocrystalline and amorphous structure were synthesized by melt-spinning technique. The microstructures of the as-spun alloys were characterized by XRD, SEM and HRTEM. The electrochemical hydrogen storage properties of the experimental alloys were measured. The obtained results show that the as-spun (M=Cu) alloys hold an entire nanocrystalline structure, whereas the as-spun (M=Co) alloys display a nanocrystalline and amorphous structure, confirming that the substitution of Co for Ni facilitates the glass formation in the Mg2Ni-type alloy. Furthermore, such substitution results in the formation of secondary phases Mg2Cu and MgCo2 instead of changing the major phase of Mg2Ni. The substitution of M (M=Cu, Co) for Ni markedly improves the electrochemical performances of the alloys, involving the discharge capacity and the cycle stability as well as the high rate discharge ability.
Scheduling for the Flexible Job-Shop Problem Based on Genetic Algorithm (GA)
Authors: Fan Shun Cheng , Wang Jin Feng
Published: February 2012

In this paper, we analyze the characteristics of the flexible job-shop scheduling problem(FJSP). A novel genetic algorithm is elaborated to solve the FJSP. An improved chromosome representation is used to conveniently represent a solution of the FJSP. Initial population is generated randomly. The relevant selection, crossover and mutation operation is also designed. It jumped from the local optimal solution, and the search area of solution is improved. Finally, the algorithm is tested on instances of 4 jobs and 6 machines. Computational results prove the proposed genetic algorithm effective for solving the FJSP.
An Approach to Assembly Sequence Planning Using Simulated Annealing
Authors: Zhang Jing , Yang Yun Sheng , Feng Shao Wei
Published: February 2012

In order to solve the problem of generating and optimizing the assembly sequences of a complex assembly, the oriented-mating graph model of the assembly and the related mating matrix are created. Then an improved simulated annealing algorithm is used to solve the ASP problem. This algorithm reflects the assembly cost to an energy function associated with the assembly sequence. The energy function is iteratively minimized and occasionally perturbed by a simulated annealing until no further change in the energy occurs. Finally, a living example is given to prove the validity of the method.
Factorial Experiment Study on Deposition Parameter Dependence of the Energy Bandgap of a-SiGe: H Thin Film Prepared by Plasma Enhanced Chemical Vapor Deposition
Authors: Zhao Lei , Yan Bao Jun , Zhao Ben Ding , Diao Hong Wei , Wang Wen Jing
Published: February 2012

The energy bandgap (Eg) of a-SiGe:H thin film prepared by plasma enhanced chemical vapor deposition (PECVD) is greatly dependent on the deposition conditions. By controlling the flow rates of the supplied gas sources, the total gas pressure, the plasma power, the substrate temperature and so on, Eg can be adjusted. Although the influence of the above deposition factors has been investigated individually, which factor is the most important is still not clear. Here, a 6-factor 5-level factorial experiment was designed to investigate the influence of the deposition factors comprehensively. By making the main effect analysis to Eg, not only the influence of each deposition factor was deduced, but also the most critical factors were selected out. It was found that the flow rates of SiH4 and GeH4, and the total gas pressure played the important roles for the Eg adjustment of a-SiGe:H thin film. So much attention can be only paid to optimize such critical factors with other factors as some default values according to the experience. Thus, the work load can be reduced greatly.
Detection Reliability and Throughput Analysis for Cooperative Spectrum Sensing in Cognitive Radio Networks
Authors: Du Hong , Wei Zai Xue , Wang Yu , Yang Da Cheng
Published: February 2012

In cognitive radio networks (CRNs), cooperative spectrum sensing technology could overcome the impact from shadow fading and noise uncertainty; however, cognitive radio users with different signal-to-noise ratios (SNRs) would cause the unreliable detection performance when making a decision in the information fusion center. Therefore, a novel cooperative spectrum sensing scheme which focus on the reliability of cognitive radio users is presented. The proposed approach does not select all of the cognitive radio users but the ones whose SNR is beyond the average SNR of the whole users for high reliability. Moreover, the detection and throughput performance is investigated. Simulation results illustrate this approach could enhances the detection probability by comparing to the conventional cooperative algorithm. Besides, it also could lead to higher throughput within a short spectrum sensing time.
Modeling and Predicting Total Electron Content by Semi-Parametric Autoregressive (AR) Model
Authors: Li Xiu Hai
Published: February 2012

Based on dynamic data system(DDS) modeling methodology, after transformed a seasonal time series for total electron content(TEC) of the ionosphere into a stationary time series by differencing technique, stationary TEC values are modeled by the autoregressive(AR) model. In order to correct model’s systematic errors, authors proposed that AR model is improved by non-parameters introduced to AR model and the ionospheric TEC is predicted using the improved AR model which is called semi-parametric AR model. Preliminary results show that the semi-parametric AR model has a good performance than one of the AR model for short-term TEC prediction while, for relatively long-term TEC prediction, the performance of the semi-parametric AR model is no less than one of AR model.
Performances of Localization Algorithms in a Prototype WSN System
Authors: Ye Jing Zhi , Zhao Ling , Luo Wen Feng
Published: February 2012

The proliferation of wireless sensor networks (WSNs) has fostered the demand of context aware applications, among which localization plays a significant role. Localization in WSN is facing the challenges of (1) error and noise; (2) dynamic environments; (3) data packet loss. However, most presented localization algorithms are verified just by simulation but practical systems. To validate the localization algorithms realistically, a prototype WSN system equipped with a group of sensor nodes is deployed in this paper. A trilateration based optimization approaches and the Extended Kalman Filter (EKF) with position-velocity (PV) model are proposed and tested in the system comparing with the traditional trilateration. The experiment result indicates that the two proposed localization algorithms have much better accuracy than the traditional trilateration and, in a certain aspect, EKF with PV model is the most suitable algorithm among the three algorithms for localization in the prototype system.
Study on Crack Tip Field of Mode I of Shape Memory Alloy in Plane Strain State
Authors: Zhou Bo , Hou Yan Yan , Lv Jun
Published: February 2012

This paper focuses on the thermo-mechanical behaviors of a shape memory alloy (SMA) plate with a crack of mode I. A phase transformation equation is supposed to express the phase transformation behaviors of SMA under complex stress state. The stress field near the crack tip is described based on linear elastic mechanics. The martensitic phase transformation zones near the crack tip at various temperatures are numerically determined.
Research of IPv6 Transition Technology and its Department on Campus Network
Authors: Wang Kui Fu , Chen Yan Ge , Xu Jing Tao
Published: February 2012

IPv4 and IPv6 coexist in networks for a long time，however careful planning and choosing the right techniques actually make the transition to IPv6 smooth and easy. By introducing IPv4 and IPv6 communications solutions in this paper, we provide the particular deployment on IPv6 campus network, furthermore, we touch on the IPv6 network deployment plan. Researching the key technology of deployment and realizing IPv4 to IPv6 smooth transition.
The Design and Research of Telemedicine Consultation System Based in SIP
Authors: Sun Xiang Hua
Published: February 2012

In this essay ,introduce the design of Telemedicine Consultation System (TCS) ,then describe the chief functions and structure, analyse the key techique to realize the system. Namely with complete SIP protocol mechanisms to realize session and the establishment of termination, media part adopts JMF to realize the audio and video data acquisition, processing, sending and receiving, played, and other functions, graphical interface part adopts Java Swing realization, and image compression and audio, video processing technology.
A CPN Based Method for Aspect-Oriented Modeling and Analysis of Fault Tolerance
Authors: Sun Xiao Xing , Yu Hui Qun , Liang Hong Hao
Published: February 2012

Software fault tolerance makes system complicated by means of diverse fault-tolerant mechanisms. Aspect-oriented programming has been confirmed as a well suited candidate to ease the problem. However, most of the existing works only focus on implementation level. This paper proposes an AOFTM model for aspect-oriented fault tolerance modeling with Coloured Petri nets at design level. Moreover, the weaving mechanism formally defined conducts the way to derive a woven net from AOFTM. A case study presents how AOFTM works, and its properties are analyzed using the CPN Tools.
Effect of Thickness of Interlayer on Microstructures of PM TC4 and GCr15 Joints Prepared by HIP Diffusion Bonding
Authors: Lang Ze Bao , Wang Liang , Jia Wen Jun
Published: February 2012

Using different thickness of pure nickel as interlayer, hot isostatic pressing (HIP) diffusion bonding between TC4 prealloyed powders and GCr15 bearing steel have been performed at the temperature of 850 °C, under pressure of 150 MPa for 2 hrs. The diffusion bonding joints gained have been observed and analyzed by optical microscopy, electron microprobe and X-ray diffraction. The result of observation by optical microcopy indicates that, at the interface of TC4 and interlayer, many connecting arcs have been formed, and these arcs gradually disappear with thickness of pure nickel increasing. The result of observation by electron microprobe reveals that, during the process of HIP diffusion bonding, nickel atoms have a short diffusion distance in the zone of GCr15, whereas they diffuse a comparatively long distance in zone of TC4. The observation also find that the distributions of elements of titanium, iron and chrome vary in different area of zone of pure nickel, which results in the formation of different type of intermetallics. Thus, the contact of titanium atom and iron atom can be avoided with certain thickness of pure nickel as interlayer. When thickness of interlayer is large than 120 um in this test, the combination of titanium atom and iron atom will be avoided and intermetallics such as TiFe and TiFe2, are disappeared. These rules mentioned above also have been confirmed by the analysis of X-ray diffraction.
Key Technologies Study for Automobile Fault Diagnosis Expert System
Authors: Zhang Li Li , Chu Jiang Wei
Published: February 2012

Expert system for automobile fault diagnosis is an intelligent system, and its key technologies are knowledge acquisition, knowledge representation and inference strategy. Based on large collection of papers which on abroad or on home, some resolved methods have been presented in this paper, including improving of traditional method such as automotive acquisition of fault rules, combined knowledge representation and inference method diversification, applying of new theory or new technology such as case-base expert system, fuzzy-base expert system, neural network-base expert system and action-base expert system and so on. And then put forward to that intellectualization, cyberization and integration are the future development direction of automobile fault diagnosis expert system.
An EDM Multi-Agent Collaborative Manufacturing System Based on Petri Net
Authors: Zhao Jin Zhi , Liu Yuan Tao , Zhao Hui Ying
Published: February 2012

A framework for building EDM collaborative manufacturing system using multi-agent technology to support organizations characterized by physically distributed, enterprise-wide, heterogeneous intelligent manufacturing system over Internet is proposed. According to the characteristics of agile EDM collaborative manufacturing system(AEDMCMS), the agent technology is combined with Petri net in order to analyze the model. Based on the basic Petri Net, the definition is extended and the Agent-oriented Petri net (APN) is proposed. AEDMCM is turned into the model of Petri Net which is suitable to the analysis and optimization of manufacturing processes.
An Immune Intrusion Detection Model Based on One-Class Classification Technology
Authors: Zhang Yan , Liu Cai Ming , Chen Run , Qin Hong Ying , Li Bin
Published: February 2012

An intrusion detection model based on biological immune principle and one-class classification technology is proposed. The one-class classification technology named support vector domain description (SVDD) is applied to the proposed model. Simple multi-dimension feature vectors of network packets are mapped into high dimension feature space. The description models of the antibody and the self set are constructed. The evolution process of antibodies is described with math language. The theoretical analysis shows that the proposed model can detect network attack effectively, and unknown network attacks can be detected.
Visualization Study of CO2 Bubble Behavior in Passive Direct Methanol Fuel Cell
Authors: Cao Xian Qi , Han Ji Tian , Yu Ze Ting , Dou Peng Cheng , Chen Pei Pei
Published: February 2012

In this work, a transparent passive DMFC was constructed to investigate the CO2bubble behavior in perforated current-collector (PECC) and parallel current-collector (PACC) by using a digital camera. Experiments were carried out in a passive DMFC with active membrane area of 9 cm2, working at ambient temperature and pressure. Results showed that small discrete bubbles appeared in PECC at low current densities; while the PECC was predominated by big bubbles at high current densities, which led to deterioration of methanol mass transfer. On the contrary, the PACC was more efficient to remove CO2bubbles than the PECC did. Therefore, it gained a better performance at high current densities.
Temperature Field Simulation of TP2 Copper Strip during Reversible Universal Hot Rolling Using Finite Element Method
Authors: Li Hai Liang , Yang Hai Bo , Li Dong Fang
Published: February 2012

As universal hot-rolling cogging can not only make full use of the alloy’s high temperature plastic but also has the characteristic of little deformation resistance, it can provide large volumes of heavy strip. Besides，Universal hot-rolling can reduce the materias of trimming effectively and improve material utilization. At present more than 90 percent of copper and copper alloy strip are manufactured by hot-rolling. The paper presents details of simulation and analysis of 3500×980×200-size copper strip in hot rolling process by using finite element simulation technique. Particular attention is paid to predict the temperature distribution and temperature history in each pass during the process.
Analysis on Influence of the Position Error of Joint Points in the Fixed Platform of 3-UPS Parallel Machine Tool
Authors: Guo Jian Ye , Jin Yan , Sheng Zhong Qi , Zhao Liang
Published: February 2012

This paper took one kind of 3-TPT Parallel Machine Tool (PMT) as the object of research. It mainly analyzed the influences of the position error of joint points in the fixed platform to the position error of tool of this PMT. Firstly, on the basis of introducing the structure of PMT, the kinematics of this machine was analyzed, and the inverse kinematics equation of this PMT was obtained. Then the influence situation of the position error of joint points in the fixed platform to the position error of tool was studied based on the kinematics analysis results and the error independent function principle, and the corresponding mathematical expression of error influence was established. Thus the theoretical foundation was laid for the comprehensive establishment of error model and the error compensation of this PMT
Image De-Noising Method with Noise Control Materials Based on Wavelet Transform and Wiener Filter
Authors: Wang Yuan Mei , Li Tao
Published: February 2012

When image with Gaussian white noise being de-noised by wavelet threshold, there are some problems such as blurring and the loss of details of edges of image. To solve above problems, image de-noising method based on wavelet transform and Wiener filtering is proposed in the paper, first using wavelet threshold to de-noise, and then using Wiener filter to smooth the image so as to get high image quality. Experimental results show that this algorithm on de-noising proposed not only can effectively suppress Gaussian white noise, but also can well preserve the details of image edges
Evaluation Implementation for Accessibility of Urban Public Green Space Based on ArcGIS Engine
Authors: Li Pei Hong , Zhang Xiao Yu , Hu Fei Hui
Published: February 2012

According to the geographical characteristics of urban public green space, the paper analyzes the factors and indexes which influence accessibility evaluation. Combining analysis functions of GIS desktop software, the paper proposes the accessibility evaluation method of urban public green space (UPGS) based on the accessibility path analysis, and then implements the function of accessibility path analysis to UPGS using ArcGIS Engine technology. This method can not only evaluate the existing UPGS, but also help the unestablished park to determine the location, and plays a certain decision-making role
Fault Diagnosis of Gear Wear Based on Local Mean Decomposition
Authors: Li Hui
Published: February 2012

A new approach to fault diagnosis of gear wear based on Local mean decomposition (LMD) is proposed. Local mean decomposition can adaptively decomposes the vibration signal into a series of product functions (PFs), which is the product of an envelope signal and a frequency modulated signal. LMD is capable of revealing interesting feature embedded in the signal. The experimental examples are conducted to evaluate the effectiveness of the proposed approach. The experimental results provide strong evidence that the performance of the approach based on local mean decomposition is better to extract the fault characteristics of the faulty gear and can effectively diagnose the gear wear fault.
Technology to Drill Micro-Holes without Recast Layer by Laser on Nickel-Based Alloy
Authors: Wang Ke Dian , Duan Wen Qiang , Mei Xue Song , Wang Wen Jun
Published: February 2012

The technology to produce micro-holes without recast layer on nickel-based alloy is studied in this work. The holes are firstly drilled with Nd: YAG laser, a millisecond pulsed laser of high power and efficiency. For the reason of thermal effect, however, holes drilled by this laser always have the defect of recast layer, which is a serious problem, especially in the application as aviation and aerospace engine. In order to remove the recast layer, laser parameters are optimized to produce micro-holes with the least recast layer, and then a kind of chemical etching is used to clear the residual recast layer completely.
Discharge Speed Control of In-Pipe Detector in Gas Pipeline
Authors: Yang Li Jian , Zhao Yang , Gao Song Wei
Published: February 2012

The in-pipe detector with magnetic flux leakage runs along the pipeline under the effect of gas flow field, completing the pipeline wall excitation, magnetic flux leakage testing, etc. Excitation within the detector on the wall and the adequacy of magnetic flux leakage signal acquisition is complete are decided by speed of in-pipe detector. In this paper, mathematical model simulation is established and the actual experiment is proposed. Simulation and experiment results show that after a long time running, in-pipe detector with different discharge area have respective upper speed limit. According to references and experiment results, the in-pipe detector with 40% discharge area is meet the detection accuracy and have the maximum detection efficiency under work conditions described in this paper
Image Segmentation Based on Facet Model Fitting
Authors: Li Wen Guo , Duan Shao Jun , Yin Zhi Hong
Published: February 2012

The image segmentation algorithm based on facet model fitting is proposed, we firstly employ the facet model to fit the image intensity, and then calculate the fitting error. After acquiring seed segmentation region from the fitting error distribution, the region growing algorithm is implemented to enlarge the seed region to some region boundary. Finally, a new region merging algorithm is implemented to merge adjacent regipons into some large regions. Experiment results intestify the correctness of our proposed segmentation algorithm
Analysis on the Factors Influencing the Kinematic Viscosity of Petroleum Products
Authors: Zhou Shan Dan , Zheng Fa Zheng , Li Tao
Published: February 2012

Kinematic viscosity is one of the important indexes for the fluid petroleum products, and the determination of which has important and practical significance for the petroleum produces. This article gives a brief introduction for the instruments and reagents to determine the petroleum products. During the process to determine the kinematic viscosity of petroleum products; the choosing, using and setting position of capillary viscometer and the mercury thermometer will greatly influence the determination of the kinematic viscosity. And the article analyzes these effects and stressed the matters of attention.
NX-Based Cell Phone Injection Mould Design
Authors: Zhou Lin Zhen , Tao Jie
Published: February 2012

In cell phone injection mould design process, abundant knowledge is reused. To improve product design efficiency, a NX-based cell phone injection mould was proposed in this paper. The key techniques such as product initialization, setting mould coordinate system, defining blank of mould core, and layout of multi-cavity mould are described in detail. As choosing suitable parting surface is very important for injection mould design, the paper explained the choosing method and process of parting surface very clearly, which effectively cut short the period of product design
Basic Study on Improving Power of Wireless Power Transfer via Magnetic Resonance Coupling
Authors: Li Yang , Yang Qing Xin , Chen Hai Yan , Zhang Xian , Jin Liang
Published: February 2012

Wireless power transfer via magnetic resonance coupling is a new technology which energy can be transferred in the non-radiative near-field. In order to improve its power, We presented a new analysis that yielded critical insight into the design of practical system . The basic study on coils design and impedance matching network for hundreds of watts was presented. Based on these analysis, The wireless power transfer experimental device was designed. Experimental results shows that the power can be transmitted is up to 300W in the distance of 2.3 m, the efficiency is 60%.
The Multi-Body Dynamic Systems Cloud Computing and Simulation Based on Modelica
Authors: Li Yao Hui , Dong Yong Qiang , Wu Yi Zhong , Wang Shu Ting
Published: February 2012

It difficult to achieve consistency and sharing storage of model library and data resources, realize modeling and functional classification and improve low efficiency based on multi-body simulation and optimization. Cloud computing concept and method are introduced in order to solve these problems. In addition, a multi-body dynamics system modeling and simulation platform for the cloud computing is established and the basic solution process of the platform is explained, which can realize security sharing, optimization and reuse of model resources of system, computing resources and data resources. Finally, feasibility analysis is to be made.
Emotion Detection System Based on Speech and Facial Signals
Authors: Zhao Hui , Wang Yu Tai , Yang Xing Hai
Published: February 2012

This paper introduces the present status of speech emotion detection. In order to improve the emotion recognition rate of single mode, the bimodal fusion method based on speech and facial expression is proposed. First, we establishes emotional database include speech and facial expression. For different emotions, calm, happy, surprise, anger, sad, we extract ten speech parameters and use the PCA method to detect the speech emotion. Then we analyze the bimodal emotion detection of fusing facial expression information. The experiment results show that the emotion recognition rate with bimodal fusion is about 6 percent points higher than the recognition rate with only speech prosodic features
Acoustic Feature-Based Clustering Analysis for Phonetic Degree of Chinese Phonogram
Authors: Ma Min
Published: February 2012

A significant portion of the Chinese characters is phonogram, whose phonetic part can be used for overall sound inference. Phonetic degree is an inherent problem in the inference because low phonetic degree implies little phonetic dependence between the phonogram and its phonetic components. Solving the phonetic degree problem requires association each phonogram with the acoustic features. This paper introduces acoustic feature-based clustering, a classifying model that divides the common phonogram by defining new similarity of the sounds. This allows phonetic degree to be evaluated more reasonable. We demonstrate the clustering outperformed the traditional empirical estimation by having more accurate and real expressiveness. Acoustic feature-based clustering output 48.6% as phonetic degree, less than the empirical claim which is around 75%. As a clustering classifier, our model is competitive with a much clearer boundary on the phonogram dataset
Design and Implementation of Human-Computer Interaction Terminal Shockproof Device Based on LPC2478
Authors: Ge Qian Qian
Published: February 2012

With the extensive use of embedded mobile terminal in everyday life, embedded terminals are getting more and more powerful,but there is no significant improvement in shock proof and use protection.The paper introduces an implementation method of embedded mobile terminal shockproof device based on LPC2478. The device has wifi communication,multi-channel sampling, real-time measurement for temperature, humidity, horizontal and vertical conditions.It measures the device distances with other objects and triaxial acceleration to achieve parametric statistical analysis and diagnostics. Its characteristics of multipoint direction identification shock proof, wireless self-synchronous firmware upgrade and power management based on users’ action mode identification provide good protection for mobile terminal products, achieving the target of shockproof.
Establishing Evaluation Model of Competition Power for the Development of Gold Mine Enterprises of Jilin Province
Authors: Lei Wei
Published: February 2012

The paper conducts a deep research on the factors that influence the competition power of the gold mine enterprises in our Province with the method of actual investigation and data query. All kinds of index influencing enterprise competition power are confirmed and the competition power is evaluated objectively. Evaluation model of competition power for gold mine enterprises in Jilin Province is established. Through a lot of actual data, the influence of each index on the sustainable development of enterprises is analyzed and the weight of each index is measured. Standard value of each index is confirmed by the new set value statistics in probability and statistics. The evaluation model of competition power suitable for the gold mine enterprises of Jilin Province is established. 3 gold mine enterprises in Jilin Province are confirmed. Their competition power is evaluated and their development trend is predicted. Determination factors influencing their development are found and measurement for the healthy development of enterprises is proposed. The paper is of great practical significance for the development of gold mine enterprises in Jilin Province, northeast area and the whole country.
New Approach for the Continuing Dynamic Programming
Authors: Zhang Peng , Meng Xiang Huan
Published: February 2012

The paper proposes the discrete approximate iteration method to solve single-dimensional continuing dynamic programming model. The paper also presents a comparison of the discrete approximate iteration method and bi- convergent method to solve multi-dimensional continuing dynamic programming model. The algorithm is the following: Firstly, let state value of one of state equations be unknown and the others be known. Secondly, use discrete approximate iteration method to find the optimal value of the unknown state values, continue iterating until all state equations have found optimal values. If the objective function is convex, the algorithm is proved linear convergent. If the objective function is non-concave and non-convex, the algorithm is proved convergent.
Tracking Moving Target on Airport Surface Based on Variable-Structure IMM Algorithm
Authors: Gong Shu Li , Wang Xu Hui , Huang Sheng Guo
Published: February 2012

In order to track the moving target precisely on the airport surface, the Variable Structure Interacting Multiple Model Algorithm (VS-IMM) is applied to realize the Surface Movement Radar (SMR) tracking of target. Firstly, according to the actual movement of aircraft, the paper establishes a constant acceleration motion model, constant turn motion model and constant velocity motion model. Then, the VS-IMM algorithm is applied to the airport surface movement target tracking. Finally, VS-IMM is compared with IMM. Simulation results show that VS-IMM algorithm is more reliable than IMM algorithm on tracking of moving target on airport surface
Application of Support Vector Machines to the Tracking Control of Piezoelectric Actuators
Authors: Yang Shu Yan , Wang Hai Feng
Published: February 2012

In this paper, a hybrid approach associated the Preisach concept with support vector machines (SVM) is brought forward to identify and predict the nonlinear behavior of piezoelectric actuators (PA). Preisach concept is used to construct mesh nodes in the Preisach plane and determine the final output displacement of PA. SVM is trained based on the mesh nodes and provides favorable generalization ability in the Preisach plane. Experimental results validate the proposed method.
Study on Refractive-Diffractive Logarithm Axicons in mm/submm Range
Authors: Yu Yan Zhong , Dou Wen Bin
Published: February 2012

Large depth of field and uniform axial intensity distributions are important in many practical applications. Lots of optical elements have been proposed for this end, such as full-aperture logarithmic axicons (LAs), annular-aperture LAs and apodized annular-aperture LAs. In millimeter/submillimeter (mm/submm) range, the refractive-diffractive behaviors (including transverse and longitudinal intensity distributions) behind these axicons illuminated by a plane wave are calculated by rigorous electromagnetic analysis method in our paper. Many important features of these axicons are concluded by comparing their refractive-diffractive field distributions
Tracking Control of Piezoelectric Actuators with Waveshaping Technique
Authors: Yang Shu Yan , Wang Hai Feng
Published: February 2012

There are many inherent nonlinear characteristics in piezoceramics material, which result in roll off, phase lag and deteriorate the tracking accuracy in dynamic applications. To improve dynamics, a waveshaping technique is put forth, which is based on fast Fourier transform algorithm, and software to shape the control signals. Using information gathered from frequency response and harmonic analysis with the original control signal applied, new track is calculated to compensate for the system nonlinearity. Experimental results indicate that the proposed waveshaping technique is more effective than the traditional control methods.
Fault Diagnosis Analysis of Rotor System Based on RBF Neural Network and Dynamic Systems
Authors: Zhang Song He , Luo Yue Gang , Wu Bin , Wang Bing Cheng
Published: February 2012

The RBF network was applied in the rotor system to realize the fault diagnosis aiming the mapping complexity between fault symptoms and fault patterns. It can overcome the problems of low learning rates of convergence and falling easily into part minimums in BP algorithm, and improve the precision of diagnosis. The normalized values of seven frequency ranges in amplitude spectrum were used as the fault characteristic quantity, the RBF network was trained to diagnose the faults of rotor system. The results show that RBF neural network is a valid method of diagnosis of mechanical failure.
Preparation and Photocatalytic Preoperty of BaV2O6 Photocatalyst by Liquid-Phase Deposition Method
Authors: Wang Min , Liu Qiong , Luan Hai Yan
Published: February 2012

BaV2O6 photocatalyst was prepared by liquid-phase deposition method in paper and different calcination temperature effecting photocatalytic activity were investigated. X-ray diffraction (XRD) has been employed to characterize the as-synthesized materials. The photocatalytic activity was evaluated by degradation of Methy lorange(MO) under the UV-light.It was found that as-prepared BaV2O6 with molar ratio of V5+ to Ba3+ be 2:1, pH=7 and calcinated under 500°C for 4h exhibits higher activity than any other calcination temperature. The highest degragation rate was about 65% or so in 100min.
Tensile Damage in Carbon Fabric/Epoxy-Matrix Composites Monitored by Electrical Resistance Measurement Combined with AE Technology
Authors: Xie Xiao Lin , Hong Zhen , Fan Hong Qing , Quan Hong Ying , Li Zhi Peng
Published: February 2012

The influence of tensile load on electrical resistance and acoustic emission (AE) energy of carbon fabric/epoxy-matrix composites were investigated in this study. The experiment results showed that both electrical resistance and AE energy of carbon fabric/epoxy-matrix composites increased with the increase of tensile load. When tensile damage in composites was brought about, the growth rate of AE energy and electrical resistance increased significantly, and the growth rate of AE energy and electrical resistance can be used as the basis of monitoring tensile damage in composites. In addition, compared with AE technology, the electrical resistance measurement by monitoring tensile damage in composites was simpler, and the results were more reliable too.
Numerical Simulation of Pile-Bucket Foundation under Horizontal Load
Authors: Liu Wen Bai , Yang Liang , Zhu Chen Xia
Published: February 2012

The pile-bucket foundation is a new kind of foundation. In this paper, the ABAQUS software was used to analyze the soil displacement field and the soil stress field surrounding of the pile-bucket foundation under the multi-cycle horizontal loading. Under the horizontal load, the active area of soil separated from the basics; the passive region takes the shape of a parabolic ring of soil wedge rotate failure surface. The maximum displacement was in the direction of horizontal load line on the surface of soil near the bucket. Horizontal and vertical soil pressure changes are concentrated under the surface of the soil near the bucket, and the maximum horizontal soil stress was in the deep soil around the bucket. There is a point of inflection between 1/3 and 1/2 of the pile into soil , and the soil pressure that upper and lower the point increased in the opposite direction. The horizontal forced resistance of the foundation mainly distributed under the bucket and 1/2 of the pile into soil .The conclusion could provide a reference basis for the analysis of bearing mechanism and destruction characters of pile-bucket foundation
Fully Nonparametric Probability Density Function Estimation Based on Empirical Mode Decomposition
Authors: Hu Hong Ying , Kan Chun Ming
Published: February 2012

Empirical Mode Decomposition (EMD) is a non-stationary signal processing method developed recently. It has been applied in many engineering fields. EMD has many similarities with wavelet decomposition. But EMD Decomposition has its own characteristics, especially in accurate rend extracting. Therefore the paper firstly proposes an algorithm of extracting slow-varying trend based on EMD. Then, according to wavelet probability density function estimation method, a new density estimation method based on EMD is presented. The simulations of Gaussian single and mixture model density estimation prove the advantages of the approach with easy computation and more accurate result
Design and Implementation of Valve Failure Signal Multi-Channel Acquisition System Based on Acoustic Emission and Pipeline
Authors: Feng Ting , Wu Jian De , Yuan Xu Yi , Fan Yu Gang , Wang Xiao Dong
Published: February 2012

Designed and implemented acoustic emission signal acquisition system core with microprocessor STM32F103RB. Acquisition system included high sensitivity acoustic emission sensors: PXR20; signal conditioning for acoustic emission, used high-speed ADC AD9225 for A/D conversion; used FIFO module for data buffer; used USB to serial port technology for data communications and transmissions. Central control unit design included gain control of amplifier circuit, clock control of external AD-chip and data cache chip, data acquisition port control, data output port control. Experimental results show that the system implements a multi-channel, parallel, high-precision acquisition and transmission for acoustic emission data.
Measurement of Solid Materials’ Young’s Modulus by Piezoelectric Resonance and ANSYS Simulation Method
Authors: He Liang Guo , Zhang Lian Sheng , Ju Bin
Published: February 2012

This paper proposes a new measuring method of solid materials' Young's modulus. By supporting and exciting a sample on the nodes, the first resonant frequency can be measured from the experiment. The errors caused by numerical fitting of the resonant frequency in previous method are eliminated. The proposed method uses the FEA software ANSYS simulation to calculate Young's modulus, allowing the tested object to be variously shaped and obtaining more accurate results. Objects with titanium alloy, aluminum alloy and stainless steel materials are tested and analyzed. Also for the same material titanium alloy, which is divided into different lengths to measure, we had very good measurement values. The maximum error is 0.3% which is much lower compared with traditional error 1%. Experimental results agree with true values well, and prove the proposed method is feasible and precise.
Recovery of Cobalt from Cobalt Chloride Solution under the Action of Ozone
Authors: Tian Qing Hua , Xin Yun Tao , Jiao Cui Yan , Guo Xue Yi
Published: February 2012

A process utilizing ozone as the precipitant for the oxidation-precipitation of cobalt from cobalt chloride solution has been studied. The main factors affecting the oxidation rate such as the stirring speed, solution temperature, ozone partial pressure, initial concentration and flow rate were investigated comprehensively. The results demonstrated that the precipitate was CoOOH and the precipitation reaction is diffusion-controlled. The oxidation rate was independent of the initial concentration or solution temperature. The oxidation rate increases obviously with increasing the stirring speed. The Linear Relationship Between ozone partial pressure or flow rate and oxidation rate was found in this paper.
The Application Analysis of New-Style Wall Materials in Hangzhou, China
Authors: Wang Yue , Gong Min
Published: February 2012

The development and popularization of new-style wall materials is currently focus of energy conservation and emission reduction in China.The study compiled statistics of new-style wall materials application in hangzhou since 1997 to 2005 to provide the guide of development direction for the future.Based on a large amount of statistical data,the study respectively analyzed from the use area, type and use ratio in different building types of new-style wall materials, and summarized the new-style wall material application rules in hangzhou and influence factors
The Research on Industry Cluster Model of Eco-Industry Park
Authors: Guo Bing , Li Xiao Guang
Published: February 2012

This paper explores the road and mode of industrial development based on the industry cluster theory. We think the ecological industrial park which has a circular economy characteristics is the inevitable trend of the development of modern industry. This paper describes mode and way of the development of circulation industry in detail. Then this paper discusses the operation mode of Ecological Industrial Park, and examples to verify. Finally, this paper gives out the development direction and strategic choice of The futural eco-industry park, and gives some possible measures.
A Study on the Effect of Chemical Composition on Properties of Lignosulfonate Prepared from Larch Tannin Extraction Residue
Authors: Wang Zhe , Xue Jing Wen
Published: February 2012

Chemical composition of larch bark residue after tannin extraction was analyzed and sulfonation reaction was proceeded on bark residue. Effects of sulfonation of bark chemical components on surface activity, dispersing property and fluidity of cement paste products were studied. Results showed that the main chemical compositions of bark residue after tannin extraction were phenolic acid and lignin, which were much higher than that of wood raw material. Hydrolysable tannin and condensed tannin also existed in bark residue. Lignosulfonate prepared from bark residue had better surface activity, dispersing property, the reason might be the existence of soluble tannin and phlobatannin, high fluidity of cement paste might come from the existence of soluble tannin and phenolic acids.
Investigation of the Twinning Mode in a Compressed Mg-10Gd-2Y-0.5Zr Alloy Assisted by Rietveld Refinement
Authors: Hou Qing Yu , Wang Jing Tao , Huang Zhen Yi
Published: February 2012

This paper investigated the twinning mode in a homogenized Mg-10Gd-2Y-0.5Zr ingot compressed at 300 oC and 1 s-1 using transmission electron microscopy observation and schematic method. Details about the primary twinning mode was studied based on the minimum sear criterion by comparing the values of the four major twinning modes in the magnesium alloys. The results show that the twins are formed first by {10-11} primary twinning being step characteristics, and then the secondary twins are formed later around the step by {10-12}secondary twinning. The results also show that the XRD Rietveld refinement method is an effective means to obtain the lattice parameter and to calculate the twinning shear that has important effect on the primary twinning mode in a h.c.p alloy.
Zirconate Conversion Coatings on Al Alloy by Electrochemical Method
Authors: Zhou Qi , Liu Hong Yan , Cheng Xiu Lian , Zhang Guang Sen
Published: February 2012

Chromium-free conversion coatings were generated to replace chromate chemical process by electrolysis treatment LY12 aluminum alloy in zirconate solution. Film thickness, dropping test, the adhesion between aluminum and paint film were tested for single-factor experiments and orthogonal to seek better electrolysis process. The paint adhesion is the first grade for electrochemical conversion solution containing complexing agents, or it is the second grade without complexing agents. When DNS complexing agent is 2 ~ 5g/L, film corrosion resistance rises with the increasing content of complexing agent. If voltage is too low, corrosion resistance of conversion coating is poor; voltage is too high, the films form powders. Better formulations for zirconate conversion coating are: 5g/L DNS complexing agent, 10V voltage, treatment temperature is 40°C. Electrochemical conversion coating is thinner than chemical conversion, but the corrosion resistance is better because the electrochemical conversion coatings are smoother and compacter than the chemical conversion coating. The paint films on electrochemical conversion coating are smoother than the chemical one. Two kinds of conversion coatings have very good adhesion with paint film up to the first level. Electrochemical conversion coatings thickness is 2.5 μm, bubble time of NaOH-glycerine solution on them is up to 92s.
The Study of Improving the Speed and Precision in Weigh-in-Motion System
Authors: Wang Yan Xia , Zhang Ting Hu
Published: February 2012

In order to increase the speed by which the WIM system allows the vehicles to go through from it and improve the precision, the process of the system is analyzed and the physics and mathematics model of the system is introduced. According to the characteristics of the model, adapting the method of adaptive compensation with pole placement to shorten the transition time, and adopt FIR digital filters basing on haiming window function to decrease the effect of disturbance on the system, thus improve the speed and precision of the system