bluuebunny/crossref_metadata_2025 huggingface dataset:
Calculation Algorithms for Automobiles’ Acceleration Performance
Authors: Gang Xian Yue , Han Yue , Wang Shu Feng
Published: June 2010

Acceleration time, as an important dynamic performance index of an automobile, is classified as acceleration time of shift and acceleration time at a given gear to evaluate an automobile’s acceleration performance. Compared with the traditional calculation method, this proposed algorithm calculates an automobile’s speed of optimal-power shift by using linear interpolation; calculates the acceleration time using Gauss integral, and calculates the acceleration time to a given distance by combining conversion method and interpolation method. A numerical example is given and the actual test results indicate that this algorithm is fit for automobile design.
Modeling to the Fatigue Crack Growth Rates of the Cast Steel for Chinese Railway Rolling Wagon Bogie Frames
Authors: Zhao Yong Xiang , Yang Bing
Published: June 2010

Compact tensional specimens are fatigued for modeling the fatigue crack growth rates of the cast steel for Chinese railway rolling wagon bogie frames. Typical fracture surface observations indicate that the fatigue cracks grew with distinct fatigue striations, river-like flowers, and second cracks in perpendicular to the fatigue crack path. Lots of dimples appeared in the transient fracture district to indicate that present material is ductile. Similar to the previous NASGRO’s exploration, a full modeling is proposed from fatigue cracking threshold to the transient fracture corresponding to the material fracture roughness. Availability has been verified to be applied for the present material. In addition, this modeling is very simple that the modeling can be performed by the conventional tests of fatigue cracking thresholds, growth rates, and fracture roughness values.
Anti-Ratcheting Design Software for Primary Auxiliary Pipeline in Nuclear Power Plant
Authors: Zhang Zhe Guang , Chen Xu , Xue Fei , Yu Wei Wei
Published: June 2010

In this study, based on ASME Code Section III, France RCC-MR, ANSYS simulation and experimental data, ratcheting and ratcheting boundary are obtained to determine allowed loading of primary auxiliary pipeline in nuclear power plant. A software of pressurized water reactor auxiliary pipeline anti-ratcheting design is compiled. The calculation method to determine the boundary of ratcheting effect is proposed in order to provide a basis for pipe structural design. This work focuses on the work of the establishment of the structure of software system. The structure mainly composed by three program modules, i.e. the database module, data computing module and data display module. The function of each module and the relationship between the modules are explained. An example to determine ratcheting boundary is presented in the paper.
Life Prediction of High Temperature Welded Component by Skeletal Point Rupture Stress
Authors: Zhang Guo Dong , Zhao Yan Fen , Xue Fei , Wang Zhao Xi , Zhou Chang Yu
Published: June 2010

At the present time, as the steam conditions and capability of the supercritical power unit increasing, the unit reliability is an important factor for the unit efficiency. High temperature, thick walled pipes are widely used in power plants and chemical plants. In this paper, life of the welded joint was predicted by the methods of skeletal point (SP) rupture stress rupture stress, which was calculated by finite element method (FEM). For the life prediction of welded component, the continuum damage mechanics was employed too. The life prediction of the welded joint by SP rupture stress was compared with the life prediction by the method of continuum damage mechanics (CDM). The research results showed that the two predicted methods were consistent. So, it can be concluded that the SP rupture stress can be used for predicting life of the high temperature welded component. The SP rupture stress method was used conveniently for the structure of power plant or other high temperature components.
A Study on Low-Velocity Impact Characteristics and Compression Strength after Impact of Ceramic/Resin Matrix Composites
Authors: Zheng Xiang , Tong Xiao Yan , Chen Hao , Yao Lei Jiang
Published: June 2010

An experimental study of low-velocity impact characteristics and strength after impact was carried out on both woven fiber-reinforced resin matrix composites and woven fiber-reinforced ceramic matrix composites. The test specimens were impacted using a dropped-weight impact test apparatus with an instrumented spherical tip. Ultrasonic C-scan was used in nondestructive testing to characterize and quantify the impact damage. Much more damage of ceramic matrix composites than that of resin matrix composites occur and process in loading stage. The peak load of resin matrix composites is higher than that of ceramic matrix composites. According to the results of observing optical photographs and C-scan images, the damage area of ceramic matrix composites is greater than that of resin matrix composites and the difference increases as the energy increases. Damage resistance of ceramic matrix composites is lower than that of resin matrix composites, but damage tolerance of ceramic matrix composites is higher than that of resin matrix composites.
Distribution of Fatigue Lives for the Diecast Magnesium Alloy
Authors: Ishihara Sotomi , Yoshifuji Syosei , Namito Tomonori , Goshima Takahito
Published: June 2010

. In this study, fatigue tests were carried out using a diecast Mg alloy AZ91 to study the distribution of fatigue lives under constant stress amplitudes. During the fatigue process of the diecast Mg alloy, cracks initiated from the casting defect within inside of the specimen, and then propagated prior to final failure of the specimen. Distributions of fatigue lives at the constant stress amplitudes can be represented by the Weibull distributions. The scatter in the distribution of fatigue lives becomes larger at the lower stress amplitude of 80 MPa as compared with those at the higher stress amplitudes. There is a common relationship regardless of the stress amplitudes between the initial maximum stress intensity factors Kimax and fatigue lives Nf. The lower Kimax, the longer Nf becomes. Integrating the fatigue crack propagation law from the initial maximum stress intensity factor Kimax to the fatigue fracture toughness Kfc, the relation Kimax vs. Nf can be successfully evaluated.
Optimization of Exponential Distribution Testing Period Based on Reliability Degradation
Authors: Li Zheng , Zhang Jing Cheng , Yao Lei Jiang , Tong Xiao Yan
Published: June 2010

For high reliability and long-life equipments, regular test on their performance is an effective approach to keep a fine status during the whole life. Because the number of failures increases with the duration of service, it is very important to use a rational testing strategy with unequal testing period instead of equal testing period. If testing period is not suitable, failure cannot be timely found and repaired, early failure or accident may occur. Reliability detection strategy of exponential distribution products is studied. And for every testing period, on the basis of the assumption that products should be tested when the rate of reliability deterioration reaches a certain value, an equal reliability degradation model on testing period is discussed. Furthermore, according to the idea that environment and personnel factors can lead to characteristic deterioration of products, a mathematical model of testing period incorporating reliability, failure rate, cost and testing efficiency is proposed. As the objective function of minimum cost and constraint functions of reliability and testing interval, an optimization model of unequal testing period is put forward. The optimization model is much better than traditional equal testing interval model in maintenance reliability lifetime, for it conforms to the reality that testing period must be shorten when the reliability degrades.
Challenges in Reliability Assessment for Electronics
Authors: He Qing Chuan , Chen Wen Hua , Pan Jun , Wang Shi Jiao
Published: June 2010

There has been a growing interest in assessing the ongoing reliability of electronics and systems in order to predict failures and provide warning to avoid catastrophic failure. Methods based on prognostics and health management shows an enabling technology to assess the reliability of electronics and systems under its actual application conditions. However, many challenges in implementation of methods based on PHM still remain including: environmental and usage profiles for life-cycle loads, identification of failure mechanism, identification of failure PoF model, identification of parameters to be monitored, approaches to anomaly detection. These challenges were presented and discussed, and would be carried out by developing methodologies and techniques.
Finite Element Analysis of Sieve Box Structure in Fluidized Bed
Authors: Li Bin , Cai Jin , Kong Xiang Wei , Song Zhao Feng
Published: June 2010

The sieve box is the major working part in fluidized bed, which bears the repeating dynamic loading. It generally works in severe condition, and the strength is a problem. In this paper, the vibration of the sieve box was analyzed with finite elemental method. Firstly, a 3D model of the box was constructed by PRO/E. Then the modal analysis and harmonic response of the model were investigated using ANSYS WORKBENCH. Based on the modal analysis theory，some parts of the sieve box were structurally optimized to avoid resonance. The simulation procedure adopted in the study and the achieved results could definitely facility the fluidized bed design and improve the design efficiency.
Finite Element Analysis on Flexible Attachments of Luffing Jib Tower Crane
Authors: Zhang Xiao Xia , Sun Chang Sheng , Zhu Jian Heng , Yang Xiao Feng
Published: June 2010

According to the mechanical characteristics of a certain luffing jib tower crane structure, finite element calculation model of the whole machine considering suspended cable under complicated working conditions is built. Nonlinear large displacements static structural analysis of the crane flexible attachment in the on-linear flexible scope is conducted with software ANSYS. The influence of variational attachment parameter on crane structure and anchoring points performance and the flexible attachment rule of crane are researched. Curves of influence of distance between two layers and tower overhanging height on crane structure and anchoring points performance and the reasonable layers and distance of flexible attachment are obtained and attachment rule of flexible attachment tower crane is derived.
Experimental Observations of Dominant Effective Short Fatigue Crack Behavior for Railway LZ50 Axle Steel
Authors: Yang Bing , Zhao Yong Xiang
Published: June 2010

, was experimentally investigated by a replica technique to seven smooth hourglass shaped specimens for railway LZ50 axle steel. Character of two-stages, i.e. the micro-structural short crack (MSC) stage and the physical short crack (PSC) stage, was revealed for the crack initiation and growth. Most importantly, the crack growth rate exhibited decelerations twice in MSC stage. This behavior was corresponding to the ferrite grain boundary firstly and then to the pearlite banded structure. The boundary appeared a barrier because there were pearlites around with significant higher micro-hardness values. The banded structure appeared a barrier because each band was rich in hard layered pearlites for the crack to cross. In PSC stage, the crack propagated with a decreasing resistance of micro-structural barriers as the crack length increased. The two barriers are inherent in the material and the crack initiation and growth are subjected to an evolutionary process under competition between the inherent resistances from the barriers and the increasing driving force from the growing crack size. This provides a prehensive understanding of the crack initiation and growth.
SPN Based Reliability Analysis in the Process Industry
Authors: Bao Shi Yi , Wang Wei Ping , Zhu Jian Xin , Gao Zeng Liang
Published: June 2010

This paper proposes a new reliability modeling and analysis approach based on Stochastic Petri Nets by employing the logical relations in the RBD to cope with the inadequacy in various quantitative reliability analysis techniques, such as Reliability Block Diagram (RBD) and Markov analysis of control system in process industry. In this paper, the proposed new approach is elaborated and its feasibility and effectiveness is illustrated in a study case. As the results show, the proposed approach is demonstrated more straightforward and visual than Markov method. This research also bears significance in its application in the reliability analysis of general system in process industry.
The Current Status of Process Planning for Multi-Material Rapid Prototyping Fabrication
Authors: Li Wei Dong , Jin G.Q. , Gao Liang , Page Colin , Popplewell K.
Published: June 2010

Rapid prototyping (RP) is an innovative manufacturing technology. In recent years, the research to fabricate multi-material products by RP is becoming active. In this paper, we update the recent development of process planning for multi-material RP.
Fatigue Life Evaluation of Unstiffined Aluminum Panels with Multiple Site Damage
Authors: Wu Ning Xiang , Xie Li Yang , Zhao Fei , Chen Bo
Published: June 2010

Fatigue test were performed on 2024-T62 aluminum panels with MSD cracks, and the fatigue behavior of panels with MSD was analyzed. By the experiment results, the speed of crack growth increased stably in most time of life span, and crack growth rate curves were plotted. Then a rough method was presented to evaluate fatigue life of aluminum panels based a constant geometric factor from the curves and the evaluation is useful in engeering.
Coupling Analysis of Heat Transfer in Finned Radiator Based on Numerical Simulation Codes ABAQUS and FLUENT
Authors: Dong Jin Shan , Gu Bo Qin
Published: June 2010

The heat transfer in solid-fluid coupling system relates to not only the heat transfer process in solid and fluid bodies but also the physical quantity exchange through the boundary. Because some boundary conditions, such as heat flux and coefficient of heat transfer, are uncertain, neither solid body nor fluid body can be separated from the coupling system when the thermal coupling analysis is carried out. A coupling analysis method based on numerical simulation codes ABAQUS and FLUENT was put forward to solve the boundary problem. The two simulation codes were controlled by the interface software which was developed to exchange the boundary conditions between solid and fluid models at each iteration step. A copper finned radiator model and its corresponding air model were built by ABAQUS and FLUENT respectively, and the heat elimination process of the radiator under forced convection conditions was investigated. The heat elimination characteristic of an aluminium radiator was also researched. By comparing with the copper radiator, it can be found that the larger the coefficient of heat conductivity is, the higher the heat elimination efficiency is.
A Hybrid Method for Determining the Dynamic Stresses of Railway Vehicle
Authors: Tang Z. , Wu Ping Bo , Yang Zhu
Published: June 2010

On the basis of the idea that the displacement response of the structure can be expressed as superposition of normal modes of vibration multiplied by corresponding time-dependent modal coordinate, the strain response of the same structure under the same loading condition can also be regarded as a superposition of strain modes multiplied by modal coordinates, this paper presents a hybrid method for determining the dynamic stresses of railway vehicle based on the combination of experiment and numerical simulation. The calculation formulas based on strain mode superposition principle is deduced in detail. The numerical experiment shows that the dynamic stress time history can be obtained by the proposed method expediently and accurately. In addition, to meet the demand of fatigue engineer of the vehicle bogie, a software system was developed, which has a friendly, open and easily removable interface and is valuable for practical use.
Design of the Inner Helicoids of Screw Motor Stator’s Steel Casing and Studying of NC Manufacturing Technology
Authors: Wang Ke , Wang Shu Qiang , Sun Xing Wei
Published: June 2010

According to the forming principle of equidistance curves, a mathematical model was concluded to calculate the curve contour of the cross section of the metal stator which has an inner helicoids and has an equal thickness rubber bushing using the primitive parameters of hypocycloid. By studying the cutting manufacturing technology of complex inner surface in slim parts, the feasibility of manufacturing large lead spiral inner surface by planning is studied and an NC envelop planning processing technology is proposed to manufacture the motor stator. The study of cutting simulation and cutting test provides the necessary theoretical support to the design of NC equipment and to cutting parameter optimization.
Computational Analysis of Condensed Vaporized Alloying Elements of 5456 Aluminum Alloy
Authors: Achebo Joseph I. , Oghoore O.
Published: June 2010

A lot of research has been done regarding the vaporization rates of alloying elements in general. However, not as much has been done on vaporized alloying element condensates. This paper investigates the drop wise pattern under a controlled thermal environment using some existing models with a few modifications to suit experimental results. From the analysis it was found that the condensation factors for Mg2+ and Al+ ions were 0.7 and 0.98 respectively. These results show that Mg2+ ions are more volatile than Al+ , and that any ions left which are usually unaccounted for would usually have been lost to spatter, or alternatively absorbed by the plasma ions within the laser welding environment. The conduction mode of heat transfer was found to be a dominant factor especially in the vicinity of the cooler regions of the metal. A vapor temperature of 2537oC was also calculated. This amounted to about 2% more than the expected boiling temperature. This paper has effectively and quantitatively analyzed the condensation process of 5456 aluminum alloy. It explicitly elucidated the approximate values of vaporized alloying elements and clearly shows how their molecular weights were affected by temperature.
A Method of Quality Control for Networked Collaborative Product Development
Authors: Jiang Xing Yu , Wang Shi Jie , Jin Jia Qi , Wang Wan Shan
Published: June 2010

To cope with the challenges of product quality design system applied in networked collaborative product development (NCPD), a new method of quality control for NCPD-collaborative quality design mode, which integrates voice of customer, quality function deployment (QFD) and failure modes and effect analysis (FMEA) , and corresponding functional modules and framework were all put forward. This mode dealt mainly with constructing and running collaborative quality design system, integrated several enabling technologies such as the integration of QFD and FMEA, task distribution of quality design, integrated technology of computer-supported-collaborative work (CSCW). On the basis of these, applying Java, JSP and JavaServlet to the system, improve working efficiency and shorten the development cycle so as to respond to the fluctuation of market demands as quick as possible. The quality design of some automobile was introduced as an example to verify that the system developed would efficiently meet the requirements of NCPD.
Theoretical and Experimental Studies of Statistical Evaluation Method for Flatness Error
Authors: Zhang Lei , Yu D.Q. , Yang Y.Q. , Zheng Dong Rong , Hu Ming
Published: June 2010

The theoretical and experimental studies of statistical evaluation method for flatness error are conducted thoroughly, and evaluation parameters and corresponding practicable data processing model are provided. Furthermore, a large number of experiments have been done and statistical analysis has been conducted. The results show that the distribution of extract elements of almost 90 percent of the measured planes is accordant with censored normal distribution, which proves that statistical flatness error obeys normal distribution. The characteristic that sample points are random variables is taken full advantage of in the statistic method, and the flatness error can be calculated without the influence of gross error and therefore the rate of waste parts can be reduced effectively.
Dynamic Design Method for Magnesium Alloys Wheel of New Energy Vehicles
Authors: Zhu Wei Hua , Zheng Zuan Xi , Feng Jin Zhi , Xu Hong Hui , Wang You Tao , Lu Lei Lei
Published: June 2010

This paper tends to find ways to replace aluminum alloy with a new kind of magnesium alloy for vehicle hubs, and also implements a dynamic design method for the hubs' weight-optimization and relevant analysis，so as to evaluate the strength reliability and modal characteristics. In comparison with most widely used aluminum alloys, magnesium alloy is one of the lightest commercialized metallic materials for structural applications. Magnesium alloys possess the attractive properties desired by automobile industry, such as low density, low cost, higher strength and out-standing damping capability. When used as wheel material, Mg alloys are able to reduce mass of the wheels, absorb vibration, damp noise emission, reduce fuel consumption and enhance acceleration and braking performance.
Spares Utilization Calculation Method Based on Maintenance Support Activity
Authors: Zhang Zhen Ying , Kang Rui , Liu Rui , Xu Zhe Han
Published: June 2010

Based on maintenance support activity, support-activity centered computation model of utilization of non-repairable spares is set up by analyzing their support process; A mathematical model for two-contact closure queuing network was established by the Markov queuing analysis method based on analyzing the operation of a station-spares-warehouse system for support process, and a calculation model of utilization of repairable spares is given; In the end, the model is also used in a numerical study. It is an effective infrastructure theory support for equipment logistics support development department to analysis the spares allocation.
Predicting the Diameter of Polyamide Superfine Fiber of Nonwoven Fabrics
Authors: Chen Ting , Sun Meng , Wu Li Li
Published: June 2010

The polymer air drawing model of polyamide melt blown nonwoven fabrics is established. The predicted fiber diameter coincides with the experimental data. The effects of the processing parameters on the fiber diameter are investigated. It is found that smaller polymer flow rate, higher initial polymer temperature, larger initial air velocity and larger die-to-collector distance can all produce finer fibers while too high initial air velocity and too large die-to-collector distance contribute little to the polymer drawing of polyamide melt. The results show great perspective of this research in the field of computer assisted design of the melt blowing technology.
Safety Evaluation of Highway Alignment Design Based on Grey Target Theory
Authors: Li Hui , Luo Yong
Published: June 2010

This text applies grey target theory to evaluate the safety of highway alignment design. According to grey target theory, many factors which affect the safety were selected. The model of the safety evaluation of highway alignment design model was put forward based on grey target theory. After we apply this method in the practice, this method of the safety evaluation of highway alignment design is proved to be effective in course of the accuracy of the safety evaluation. Investigative results indicate that some subjective factors can be eliminated to a certain extent based on evaluation model of grey target theory in the course of alignment scheme choice，which make the choice result more objective. And it is a certain application value for the safety evaluation of highway alignment design.
A Two-Component Gas Analyzer Based on Self-Sustaining Dark Discharge Carbon Nanotube Film Cathode Gas Sensor
Authors: Lin Ji Peng , Liu Jun Hua
Published: June 2010

A new type of cathode gas sensor based on carbon nanotube film is presented to analyze CO and CH4 mixed gas. The structure and measuring principle of breakdown voltages are proposed to build support vector machine nonlinear model. As a result, the max relative error of CO and CH4 is 3.8% and 6.0%, respectively. This hints the sensor acts an accuracy measurement.
The Novel Methods of Software Architecture Based on the UML and B Methods
Authors: Zhou Shu , Zhang Rong Hu , Zhong Yong
Published: June 2010

The paper proposed a novel methods of Software Architecture Based on the UML
and B methods in order to solve the aspects of the architecture of the Statute strengths and
weaknesses of existing language software architecture. By the defined rules will be relatively
independent of each other sub-components or connections to the executable code refinement.
Finally, a concrete example to verify the feasibility of the method. The method is entirely possible
refinement in the software architecture, the process of implementation, both retained the use of a
systematic analysis of UML design system modeling capabilities and powerful object-oriented
model of clear and concise notation, but also against the software model can be formalized The
refinement process of validation, the combination of these two methods found a good balance
point, making software architecture allows us to design the same time, the architecture design can
ensure the consistency and reliability.
A Pipeline Approach for Component Composition
Authors: Ma Hong Jiang , Zhou Xiang Bing , Yang Xing Jiang
Published: June 2010

Component-Based Software Development is widely used in the software development, which focus on component composition and reutilization, but some problems such as compatibility and consistency always impact on component composition. Thus, we proposed a pipeline approach for component composition, which establish pipeline management mechanisms included different workshop section, workshop , monitoring and coordination, then ontology is interposed different workshop to implement component composition. Finally, it is analyzed by application example to show that the approach is feasible.
Research on Core Competence of Corporation Based on Intellectual Capital
Authors: Yao Li Gen , Dong Zhen Lin
Published: June 2010

Intellectual capital is the capital form of the modern corporation core competence. The authors analyzed and discussed the formation of core competence of corporation by using balanced score card. Besides that, this issue evaluated the core competence of corporation based on the combination of analytic hierarchy process and fuzzy comprehensive evaluation.
Zero-Watermark Resistant to MP3 Compression
Authors: Zuo Jing Long , Cui De Long
Published: June 2010

Most watermarking schemes in literatures are usually implemented by embedding a mark in a host media itself for intended purposes. The existing techniques for watermarking are confronted with the problems of perceptible quality degradation and the inherent conflict between imperceptibility and robustness, which introduced by the watermark embedding. In this paper, we propose a novel audio zero-watermarking scheme for content authentication. First the audio is divided to frame by fixed length and then low-frequent and high-frequent components are obtained by three-level lifting-based wavelet transformation in every frame. Secondly the audio frame is approximately represented as a product of a base matrix and a coefficient matrix using non-negative matrix factorization (NMF). Finally the sum of each column in the coefficient matrix is calculated which is quantized to produce a feature vector, and then the copyright information is obtained by calculating the watermark and feature vector. Experiment results show that the proposed scheme is robust against Mp3 compression and secure.
Research on Extreme Points Optimizing of Nonlinear Multi-Peak Function Based on Genetic Algorithm
Authors: Yang Lu Gang
Published: June 2010

In the application of Genetic Algorithm (GA) to solve the function optimization problem, different encoding methods have different effect on performance of GA. Aiming at the global optimization problem of a class of nonlinear multi-peak function, the paper utilized binary coding and floating coding methods for genetic optimization and analyzed their performance. The experimental result of four kinds of typical nonlinear multi-peak function showed that under the precondition of given genetic operator, the optimizing performance of floating coding method to optimize nonlinear multi-peak function with isolated extreme points is less that the binary coding. The tuning ability of floating coding is stronger. As to the ordinary multi-peak function, the search affect is better than binary coding.
Screening Model in Enterprise Competitive Intelligence Activity
Authors: Yu Hai Dong , Liu Fang , Luo Yun Feng
Published: June 2010

The paper researched the screening model in enterprise competitive intelligence activity based on game theory. It studied the service provider’s decision in competitive intelligence(CI) project and proved it could be satisfied with Bayesian Nash equilibrium. It also revealed the heterogeneity between the service providers through a signaling game model in which signal set was the combine of CI quality standard term. The result shows that a quality standard about CI should be designed in contract which provides a signal for service provider to self-certify its own true type and is in favor of screening for enterprise.
Evaluation Method Research of the Art Design Teaching Based AHP
Authors: Geng Xiao Xiao , Wang Ying Chen
Published: June 2010

The art design is the perfect combination between the human society and the spirit of certain material features, is also the inevitable product of the development process of the modern society. Art comes from life, in turn, which also affects on life. Art design is used to create functional and reasonable, comfortable and beautiful environment based on the building's useness nature, environment and the corresponding standard in order to meet the material and spiritual needs of people. By analyzing the art design research status, content and factor analysis, this article used AHP to evaluate the art design teaching. Though evaluating the results, We can easily transform the teaching profession of the art design teaching, which is a good way to promote the development of art design education.
A Fast BP Algorithm and its Application in China Stock Market
Authors: Chen Si Hua
Published: June 2010

Aiming at the drawback of large calculation and slow convergent speed in BP algorithm, this paper proposes a new BP algorithm with the concept of error deviation rate. By carrying out serious methmatical deduction, the paper revises the the chain rule of traditional BP algorithm and proves its theoretical feasibility. Then, this paper applies it to Chinese stock market and has gained quite well convergent speed and predicting effect, consequently proving the new method’s effectiveness.
A Network Intrusion Detection Method Inspired by Biological Immunology
Authors: Deng Rong , Zhang Xiu Yin
Published: June 2010

In this article an Immune Based Intrusion Detection Model (IBIDM) was built to simulate the dynamic relationships between the intrusion antigen intensity and the antibody concentration in the biological immune systems. In IBIDM, traditional detection rules and network traffic patterns are mapped to antibodies and antigens respectively. The network security situation is presented in the form of detector numbers to help reduce false alarm rate. Computer simulations show that the proposed model is effective for intrusion detection.
Bioinformatics Analysis of Laccase (Lac1) in Pycnoporus cinnabarinus
Authors: Li He , Zhou Guo Ying , Zhang Huai Yun , Guo Liang
Published: June 2010

Pycnoporus cinnabarinus is a plant pathogen. It is common in many areas and is widely distributed throughout the world. Laccases of are some of the few oxidoreductases commercialized as industrial catalysts. In the present study, some characters of the amino acid sequence of P.cinnabarinus laccase (Lac1) were predicted and analyzed with the tools of bioinformatics. These results showed that the protein was composed of 20 kinds of amino acid; the theoretical pI of manganese peroxidase was 4.81 and the theoretical molecular weight of manganese peroxidase was 56292.0 Da; total number of atoms was 7806; the extinction coefficient was 58120 (280 nm). The N-terminal of the sequence considered was M (Met) and the estimated half-life was 30 hours (mammalian reticulocytes, in vitro). The instability index (II) was computed to be 34.50; this classifies the protein as stable. Aliphatic index was 82.64. Grand average of hydropathicity (GRAVY) was -0.063. There were 8 glycosylation sites, a signal peptide and conserved domains.
A Implement of Access Control Based Multi-Polices Using XML
Authors: Peng Tao , Jiang Ming Hua , Hu Ming
Published: June 2010

A multi-polices access control model is proposed, with the model, access control based on policy regulation and XML based policy description is given. At the same time, We use the XSD(XML Schema Definition) to describe the content and the structure of the xml documents, and check the validity of the xml documents. Based on the description of the access control, an application system is realized we construct the runtime platform and choose some access control polices to test our system. The result is well.
Application of Object-Oriented Languages and Private Principles of Steganography in Deconstructing Local-Area Networks
Authors: Qu Zhi Ming
Published: June 2010

Object-oriented is an important feature of operating system, and it is not exclusive to its micro-kernel architecture but promoting it. Object-oriented technology embodies design and implementation, which makes idea and realization possible. Due to the openness of transmission medium, LAN communication requests higher and better steganography-keeping performance. Through the features of LAN network security, the LAN security framework and hierarchical network security technology are proposed. Based on the basic principles and common methods of steganography information and the commonly used methods, combined with steganography capacity and the distortion changes of statistical properties, the improved LSB steganography writing with anti-steganography is given. In conclusion, the method can write different amount of data in different regions.
A Simulation System for MIMO Radar
Authors: Zeng Jian Kui , Dong Zi Ming
Published: June 2010

MIMO radar (Multiple input multiple output radar) is a novel radar technique developed recently. It can achieve better detection performance than conventional phased radar. In this paper, the MIMO radar signal model is studied, and then the signal processing flow of the MIMO radar is researched. At last, a simulation platform with the Matlab is established to testify the advantage of MIMO radar over its conventional counterpart.
Dynamic Optimum of the MEMS Micro-Deformable Mirror for Food Safety Detection
Authors: Gong Yan Jue , Fu Zhao , Xiang Hui Yu , Zhang Li , Meng Chun Ling
Published: June 2010

As the important elements in adaptive optical system used for food safety detection instrument, Micro-deformable mirrors are typical Microelectromechanical systems (MEMS). This paper focuses on the structural optimization of the MEMS Micro-deformable mirror. With the method of finite method analysis, the dynamic characteristics of the micro-mirror are studied by the analysis of modal and frequency respond. The random vibration analysis followed shows the optimized structure parameters of the micro-mirror are effective to improve the dynamic performance of the mirror.
The Fidelity of the Digitization of Chinese Ancient Books
Authors: Ji Zhi Gang , Wang Zhi Hui , Xie Hui Zhong
Published: June 2010

Fidelity ranks the top priorities when experts of the industry face the task of solving application problem of digitized ancient Chinese books in the process of their digitization. Starting from practice, this article probes into fidelity in the two links of carrier conversion and issuing ways of ancient Chinese books in the process of their digitization, and put forward new insights into solving fidelity problems.
Research of the Collaborative Filtering Algorithm for E-Commerce
Authors: Luo Ya
Published: June 2010

In this paper we mainly discuss the Collaborative Filtering algorithm which is widely applied in E-commerce. This article presents the idea of Collaborative Filtering algorithm and its main step. It analyzes the problem of cold start and data sparsity which affect the accuracy of prediction and results, as well as an idea of improvement Collaborative Filtering algorithm.
Evaluation of Enterprise Technical Innovation Capacity Based on Interval Number and Entropy Method
Authors: Cui He Rui
Published: June 2010

It has important practical significance to study technical innovation capacity deeply for enterprises which are in the economic globalization. This paper directs at the form of property value are interval numbers and the weight information is completely unknown case, It determines the weights of the attributes by the entropy method based on changing interval numbers decision matrix into single point decision matrix, then measure and evaluate enterprise technical innovation capacity scientifically. Finally, a example indicates that this method is a scientific and practical one for enterprises.
Research on Color Control for Color Scanner
Authors: Li Xin Wu
Published: June 2010

Color control for color Scanner is a key and difficult technique in Computer color image reproduction. After analyzing rendering principle of color scanner a new color control model based on subsectional fitting is preseed. First, The paper analyzes the color error source of scanner in theory; Then standard color target is taken for experimental sample to substitute color blocks in color shade district for complete color space to solve the difficulties of experimental color blocks selecting; Third the model for correcting color error is deduced; Finally the experimental results show that the model can improve scanner color control accuracy and can be used in scanner color control practically.
Modal Analysis of the Cable-Stayed Space Truss Combining ANSYS and MSC.ADAMS
Authors: Zhang Jing Jun , Zhong Ji Tao , He Li Li , Gao Rui Zhen
Published: June 2010

Modal analysis, which is applied to verify the vibration characteristic of structures, is the basis of various dynamic analyses. In this paper, firstly, a cable-stayed space truss, consisting of stay cables, columns and space truss, is built in ANSYS. Secondly, modal analysis is performed to confirm the natural frequencies of the structure and 10 modes are extracted. Thirdly, a modal neutral file including all necessary information of flexible bodies is generated by ANSYS and then imported into ADAMS for further modal analysis. Finally, comparison of results between ANSYS and ADAMS are summarized and qualitative analysis is carried out aiming at the difference of natural frequencies between ANSYS and ADAMS. The simulation results indicate that the interface between the two tools has strong compatibility regardless of minor errors in it.
Retrieval Oriented Robust Audio Hashing
Authors: Cui De Long , Zuo Jing Long
Published: June 2010

Aiming at content-based audio retrieval (CBAR) applications, a robust audio hashing scheme is proposed. First the audio is divided to frame by fixed length and then low-frequent and high-frequent components are obtained by three-level lifting-based wavelet transformation in every frame. Secondly the audio frame is approximately represented as a product of a base matrix and an encoding matrix, or coefficient matrix, using non-negative matrix factorization (NMF). Finally the sum of each column in the coefficient matrix is calculated, which is then quantized to produce one bit of the hash sequence. Experiment results show that the proposed scheme is robust against Mp3 compression, Real compression, filtering, amplitude compression, equalization, echo, etc. It is insensitive to small local change, and therefore is suitable for distinguishing different audios.
Open Loop Stability on Hybrid Synchronous Motor
Authors: Chen Xue Zhen
Published: June 2010

This paper searched open loop stability on hybrid synchronous motor which is made of a permanent magnet part and a reluctance part, there is important influence for the ratio k, the fraction length of the permanent magnet part, and the displaced angle α, the between the two part d-axis, the small-signal mathematics model was derived based on d-q reference frame, and optimized the appropriate k and α value considering the stability and the harmonic distortion factor (THD), The simulation results show that the model is correct.
Accurate SER Estimation by Transform Matrix Analysis for Fault Tolerant Circuits Design
Authors: Yu Chang Hong
Published: June 2010

As the transistor sizes continue to shrink, quantum effects will significantly affect the circuit behavior. The inherent unreliability of nano-electronics will have significantly impact on the way of circuits design, so defects and faults of nano-scale circuit technologies have to be taken into account early in the design of digital systems. Fault-tolerant architectures may become a necessity to ensure that the underlying circuit could function properly. In CAD software, a same logic can be made out with different circuits but different design methodology can reach different soft error tolerance ability, so we must find a way to estimate the error rate of the circuit efficiently to make the design more fault tolerant. In this paper, a new way to fault tolerance design in nano-scale circuit by accurate soft error rate (SER) estimation is proposed. Transform matrix is used for SER computation and a design criteria is then proposed. Simulation results show that the proposed transform matrix model is effective for nano-scale circuits and the criteria delivered is suitable CAD tools development in nano-system design.
Mechanical Design of a Needle Driven Robot
Authors: Du Qin Jun , Dong Chuan Dai , Ba Lian Liang
Published: June 2010

This paper describes mechanical design for a minimally invasive surgery robot, the robot will help surgons to realize high quality and precise localization in radio frequency ablation for patients with liver tumors. At present, radio frequency ablation minimally invasive more and more using in the minimally surgery operation, therefore, to develope a medical robot assisting surgons to achieve success in the radio frequency operation is necessary. In this paper, we analysis the radio frequency operation, according to the requirement of the minimally invasive operation, a medical robot structure is designed. We discuss the robot work space, gearbox mechanical and robot arm design. through localization experiment shows that the robot precise meet the minimally invasive operation requirements.
Power Dissipation Analysis of Adiabatic Circuits and Active Leakage Power Estimation in Nanometer CMOS Processes
Authors: Zhang Wei Qiang , Su Li , Ye Li Fang , Hu Jian Ping
Published: June 2010

The leakage dissipations of nano-circuits have become a critical concern. Estimating the leakage power of nano-circuits is very important in low-power design. This paper presents a new estimation technology for the active leakage dissipations of adiabatic logic circuits. Based on the power dissipation models of adiabatic circuits, active leakage dissipations are estimated by testing total leakage dissipations with additional capacitances on load nodes of the adiabatic circuits using HSPICE simulations. Taken as an example, the estimation for dynamic and active leakage power dissipations of CPAL (Complementary Pass-transistor Adiabatic Logic) circuits is demonstrated using the proposed estimation technology. The simulation results show that the proposed estimation technology can accurately estimate the active leakage dissipations of CPAL circuits with an accepted error over a wide range of frequencies.
The Study of Cooling Water Waste Heat Recovery in Chemical Plant by Heat Pump System
Authors: Wang Jing Gang , Gao Xiao Xia , Liang Bo , Zhou Hua Hui
Published: June 2010

A large number of cooling water exists in chemical plant, use water source heat pump and lithium bromide absorption heat pump system to achieve water cooling instead of cooling tower, at the same time, extract heat for building cooling and heating. Respectively introduced the summer cooling system and winter heating system, and a feasibility analysis was carried out. The conclusion is get: water source heat pump system and lithium bromide absorption heat pump system for cooling water waste heat recovery is certain feasibility; the environment optimization can be achieved in chemical plant, at the same time, energy conservation and emission reduction is realized.
Mechanical Properties and Structures of High Entropy Alloys and Bulk Metallic Glasses Composites
Authors: Zhang Yong
Published: June 2010

Bulk metallic glasses (BMGs) and high entropy alloys (HEAs) have unique structures at the length scales of micro- and nano-metre, and exhibit unique properties, which make them potential materials for structural applications. The tensile ductility of dendrite/BMG composites can be greatly improved by Bridgman solidification. The BCC structured HEA with a composition of Ti0.5AlCoCrFeNi exhibits ultrahigh fracture strength which is competitive to most of the BMGs, moreover, the strength can be sustained at high temperatures. The phase changes of HEAs are closely related to the atomic packing efficiency (APE).
Effect of Nitridation Magnetic Properties of Nanocrystalline Fe-Co Alloy Powders
Authors: He Ya Qiong , Mao Chang Hui , Yang Jian
Published: June 2010

Nanocrystalline Fe-Co alloy powders, which were prepared by high-energy mechanical milling, were nitrided under the mixing gas of NH3/H2 in the temperature range from 380°C to 510°C. X-ray diffraction (XRD) was used to analyze the grain size and reaction during the processing. The magnetic properties of the nitrided powders were measured by Vibrating Sample Magnetometer (VSM). The results show that with the appearance of Fe4N phase after nitride treatment, and the grain-size of FeCo phase decreases with the increase of nitridation temperature between 380°C to 450°C.The saturation magnetization of nitrided alloy powder treated at 480°C is about 18% higher than that of the initial Fe-Co alloy powder, accompanied by the reduction of the coercivity. Transmission electron microscope (TEM) was used, attempting to further analyze the effect of Fe4N phase on microstructure and magnetic properties of the powder mixtures.
Tensile Properties of Bulk Nanocrystalline Ni and Ni-W Fabricated by Sulfamate Bath
Authors: Matsui Isao , Takigawa Yorinobu , Uesugi Tokuteru , Higashi Kenji
Published: June 2010

Nanocrystalline materials with high strength have been reported in large numbers. In particular, there has been considerable research on electrodeposited nanocrystalline Ni (nc-Ni) and nc-Ni alloys. However, reported data vary widely especially in ductility. Therefore, it is necessary to obtain the true characteristic value of nc-Ni and nc-Ni alloys. In the present study, nc-Ni and nc-Ni-W was electrodeposited under different conditions in order to obtained bulk nc-Ni and nc-Ni-W with high tensile strength and good ductility. At first, bulk nc-Ni-W was fabricated using a sulfamate bath. Although the resulting bulk nc-Ni-W had inhomogeneous grain size and W-concentration, this sample exhibited plastic deformation behavior. Then, nc-Ni was fabiricated by four types of sulfamate baths. As a result, the nc-Ni obtained from a sulfamate bath containg added saccharine and 2-butyne-1,4-diol exhibited brittle behavior. In contrast, bulk nc-Ni obtained from sulfamate bath with a grain size of about 60 nm exhibited a tensile strength of about 1000 MPa and ductility of 8.8 %.