bluuebunny/crossref_metadata_2025 huggingface dataset:
Briefing: Introduction of nuclear civil engineering degree
Authors: Iqbal Javed , Yaqub Muhammad , Khan Qaiser uz Zaman
Published: March 2012

The authors propose that a new degree, namely nuclear civil engineering, should be introduced at postgraduate level for better utilisation of civil engineers in nuclear power plant design and construction. At present, both nuclear engineering and civil engineering degrees are offered at graduate and postgraduate levels in numerous renowned universities of the world. However, a civil engineer, even after completion of nuclear engineering at postgraduate level, undertaking an assignment related to nuclear power plant design, may encounter various problems that are not covered in the present curricula. For instance, design of prestressed concrete containment against loads from loss of coolant accidents, various impulsive and impactive loads and mininimum thickness requirements for shielding are some of the core issues in nuclear power plant design. The paper highlights the importance of introduction of a nuclear civil engineering degree at the postgraduate level. In addition, the contents of the proposed coursework are also discussed. Keeping in view the fact that, currently, no such degree is offered in any university around the world, the paper explores useful avenues to human resource development for introducing and expanding nuclear power programmes.
Compositional and urban form effects on centres in Greater London
Authors: Chiaradia Alain , Hillier Bill , Schwander Christian , Wedderburn Martin
Published: March 2012

In recent years spatial economics has focused on the spatial location of economic activities and its determinants. At the city-region level, a significant part of the analysis has been concerned with the concept of agglomeration as a source of economies of scale, productivity growth and the role of transport: the spatial accessibility economies. Using space syntax spatial analyses, the socio-economic and spatial patterns of ten centres located in inner and outer London are analysed. Empirical evidence of the relationship between multi-scale spatial accessibilities and movement economies, as dependent on spatial configuration, is well charted in the space syntax literature. The findings show that centres have specific spatial configuration signatures, which distinguish centres from their spatial context. These signatures lead to the identification of centre spatial factor components. The interaction between socio-economic compositional effect and spatial signature profiles is investigated and leads to preliminary centre socio-economic/spatial typologies and a value model.
Briefing: Cities of clubs
Authors: Webster Chris
Published: March 2012

The 2005 American Housing Survey reveals that 11% of residents on the west coast of the USA live in gated communities. The trend is not confined to America: just about all new housing built in China over the last 10 years is gated, with neighbourhood walls, guards, owner-governance structures, fees and neighbourhood management and investment plans based not on the municipal government model but on the model of the member-controlled club: hence the idea of ‘cities of clubs’. Residential club economics are compelling. There is, in principle, no reason why large parts of British cities should not evolve in this way. While this will happen piecemeal under current laws, urban land reform that allows neighbourhoods to opt-out of municipal ownership and governance of non-strategic local public goods, could fundamentally reshape British cities for the better. It would also spawn a multi-billion pound private neighbourhood management market and replace the long-waves of urban decay and renewal that are characteristic of public ownership, with a far more responsive re-investment regime.
Client Variables Associated with Four Key Determinants of Demand for Tax Preparer Services: An Exploratory Study
Authors: Fleischman Gary M. , Stephenson Teresa
Published: March 2012

SYNOPSIS

There is a rich literature associated with the dichotomous decision to hire/not-hire tax preparation services. There is also some research assigning motivation to the decision to hire tax preparation services. However, no research has examined the underlying demographics and key perceptions of clients that do hire tax preparation professionals to determine which are associated with specific motivations to hire. We focus on the four most common motivations to hire a preparer found in extant literature (i.e., saving money, saving time, legal compliance, and protection from the IRS). Using survey data, we perform exploratory analysis using MANCOVA to discover what client demographics and perceptions underlie each motivation.

Our most noteworthy finding is that client perceptions of tax advocacy are positively associated with all four focal motivations to hire. Our results also suggest that female clients, more than male clients, choose tax preparers with a desire to save time and to be legally compliant. In addition, taxpayers with children tend to be more concerned with legal compliance. We also find that taxpayers with relatively complex returns are less likely to hire a preparer to provide a legally compliant return and to gain protection from the IRS.

Data Availability: The data are available from the authors upon request.
Breast carcinoma in young females below the age of 35 years - histopathological and prognostic significance
Authors: Ghartimagar D , Ghosh A , Talwar OP , Narasimhan R
Published: March 2012

Background: Breast cancers rarely occur in young women but are known to have more aggressive behaviors and poorer outcome. We here compare the significance of breast carcinoma in female below the age of 35 to the age over 35 whose specimens were submitted to Manipal teaching hospital, Pokhara. Materials and Methods: All cases of mastectomy with carcinoma from January 2000 to September 2011 were included in the study. Clinical and histopathological datas of all cases were reviewed and collated. Results: A total of 148 mastectomy specimens were received, among which, 23 cases (16%) were below 35 years; whereas 125 cases (84%) were above 35 years of age. In both groups, Stage II was the commonest stage but stage III was much more common in older group (33% versus 9%) and stage I was more common in younger age group (39% versus 27%). Bloom Richardson grading showed that in the older age group, grade 1 is the commonest grade (50%) while in the younger group; grade 3 is the commonest (39%). Patients were followed for a varying period of 6 months to 5 years. Two cases (2% of followed up cases) in older group and 3 cases (15% of followed up cases) in the younger group showed recurrence. Conclusion: Breast carcinoma in the patients younger than 35 years though presented at an early stage has higher grade tumor and poorer outcome. DOI: http://dx.doi.org/10.3126/jpn.v2i3.6021 JPN 2012; 2(3): 198-202
Trend and prevalence of transfusion transmitted infections among blood donors in rural teaching institute, south India
Authors: Leena MS , Mohd Shafee
Published: March 2012

Background: The magnitude of transfusion transmitted infections (TTI) varies from country to country depending on TTI’s load in that particular population. The aim of the study was to study the trend and prevalence of sero-markers among blood donors in one of the tertiary health center in south India. Materials and Methods: A retrospective cross-sectional study was performed from 2004 to 2010 in a blood bank of teaching hospital in South India. All blood donors who presented to blood bank during the study period were included. Data regarding demography and serological tests were collected on predesigned proforma. Results: There were a total of 6939 blood donors during study period. Out of these, 94(1.35%) were positive for sero-markers for TTIs. The number of blood donors as well as sero-positivity increased from year 2004 to 2010. Conclusions: Trend and sero-prevalence of TTIs increased over period of time. Sero-positivity for TTIs decreased from year 2004 to 2010. DOI: http://dx.doi.org/10.3126/jpn.v2i3.6022 JPN 2012; 2(3): 203-206
Ileo-psoas muscle metastasis from pulmonary carcinoma
Authors: Parajuli S , Basnet RB , Tuladhar A
Published: March 2012

Metastatic disease to muscle is rare and may be misdiagnosed when it is the presenting symptom, particularly in the absence of a known primary tumor. Skeletal muscle metastasis as a mode of presentation of primary lung cancer is an unusual phenomenon. Here, we report a case of ileo-psoas muscle metastasis from lung cancer as the initial clinical manifestation in a 58 year-old male with a personal history of heavy smoking. Excisional biopsy of the mass in the ileo-psoas muscle revealed metastatic adenocarcinoma. Computed tomography scan of the chest for a primary search was done and found to be pulmonary carcinoma. DOI: http://dx.doi.org/10.3126/jpn.v2i3.6033 JPN 2012; 2(3): 251-253
Synthesis and Crystal Structures of New 5,5'-Azotetrazolates
Authors: Laus Gerhard , Kahlenberg Volker , Wurst Klaus , Schottenberger Herwig , Fischer Niko , Stierstorfer Jörg , Klapötke Thomas M.
Published: March 2012

Five new 5,5'-azotetrazolate salts (amminsilver, trimethylsulfonium, tetramethyl-phosphonium, trimethylsulfoxonium, 2-(hydroxyethyl)trimethylammonium) were prepared and characterized. The crystal structures were determined by X-ray diffraction. Interactions between the ions are identified and discussed. The sensitivities of the highly energetic silver salt were measured by BAM (Bundesanstalt für Materialforschung und-prüfung) methods.
Spreading the cult body on YouTube: A case study of "Telephone" derivative videos
Authors: Vellar Agnese
Published: March 2012

This case study of spreadability analyzes the Lady Gaga music video "Telephone," which has been appropriated and reworked by YouTube users sharing derivative works online. What properties of the music video stimulate user appropriation? What hybrid audiovisual forms are emerging from its reworking by users? In order to answer these questions, between January and August 2010, I conducted participant observation on Lady Gaga's official social network profiles and collected 70 "Telephone" derivative videos on YouTube. I identified three main categories of video creativity: (1) music (which includes covers, "me singing" videos, music mashups, and choreography); (2) parody (in which YouTube users and comedians humorously imitate Gaga, creating spoofs); and (3) fashion (in which makeup artists and amateurs appropriate the star's image to create makeup and hair tutorials). "Telephone" has become spreadable because it integrates dance music and choreography, costume changes, cinematic references, and product placements that work as textual hooks meaningful to different target markets: live music, dance, chick, and postmodern cinematic cultures. In particular, Gaga is a cult body that explicitly incorporates previous cinematic and pop music icons. Users are stimulated to reenact Gaga's cult body online. On YouTube, spreadability is thus strictly related to the appropriation of cult bodies. Fans, comedians, independent musicians, fashionistas, and pop stars construct their own cult bodies by deliberately borrowing characteristics from previous media icons and reenacting them in online videos in order to fulfill their expressive and professional needs.
Le terminologue et le spécialiste de domaine
Authors: Humbley John
Published: March 2012

La terminologie, conçue comme méthode interdisciplinaire visant à transmettre des connaissances par des moyens linguistiques, est appelée à jouer un rôle important dans l’enseignement des langues de spécialité. En prenant comme point de départ les concepts de la formation professionnelle des étudiants, la terminologie assure le lien entre discipline, langue maternelle et langues vivantes. Les possibilités de cette démarche sont illustrées dans les domaines du droit, de la mécanique de la rupture, et des professions de la banque et des assurances.
Establishing Geometry and Functional Parameters Relationships through Regression Analysis and their Assistance to Product Customization
Authors: Zia Ahmad , Qiao Li Hong
Published: March 2012

In a product structure composed of different parts, sub-assemblies and/or assemblies, different constituents have their particular role in overall product function. Modular product design enables designing instances of a product suitable for different applications with minor design changes in certain parts or systems and plays an important role in product customization. On the other hand, product geometry and functional parameters are related with each other and appropriate selection of the former can ensure fulfillment of the latter. In this research, a micro-level methodology for product customization by designing part instances in a modular design is presented. The approach emphasizes on achieving product functional parameters while controlling respective critical geometric parameters. In this regard, product geometric and functional parameters relationships are established using regression analysis of results from finite element analysis (FEA) simulations of product process model. The research is applied on a machine structure from industry and the results show success and effectiveness of the proposed methodology.
A Framework of Digital Factory System Using Multi-Resolution Simulation
Authors: Guan Zai Lin , Wang Chuang Jian , Wu Yun Feng , Shao Xin Yu
Published: March 2012

Digital Factory (DF) technology is one of the most important part of manufacturer enterprise information systems, its core technology is modeling & simulation. This paper introduced the digital factory concept and its functions with multi-level multi-resolution modeling and simulation method; we established a new framework of the digital factory technology. It combines with the features of DF and simulation technology which expands the development of DF and application of simulation technology. A case was taken to show the feasibility of multi-level modeling & multi-resolution simulation technology attaching to the DF technology.
Research and Evaluation on the Planning and Sanding Properties of Toona sinensis
Authors: Su Chu Wang , Yuan Quan Ping , Wang Ze Kun , Chen Hong , Zeng Fan Hua
Published: March 2012

In this paper, the planning and sanding properties of Toona sinensis, compared with Castanopsis hystrix, were tested. The properties were conducted according to the criteria ASTM D1666-87. The results show as follow: in the evaluation system for full marks 5 points, the planning marks of Toona sinensis and Castanopsis hystrix was separately 4.4 points and 4.7 points, and the sanding marks was separately 4.7 points and 4.3 points, slightly different; the planning and sanding properties of Toona sinensis and Castanopsis hystrix all show excellent; feeding speed had remarkable influence on the planning properties of Toona sinensis and Castanopsis hystrix; cutting thickness had different influence on the planning properties of two kinds of woods; the wood quality had important influence on the sanding property.
The Influence of the Hydrothermal Temperature on the Morphologies of β-Ni(OH)2 Nanospheres and Nanoflakes
Authors: Fu Xiao Ming
Published: March 2012

β-Ni(OH)2 nanospheres and nanoflakes have been successfully synthesized with nickel nitrate as nickel source and stronger ammonia water as precipitant via the hydrothermal method. The phase and the morphologies of the samples have been characterized and analyzed by XRD (X-ray diffraction) and SEM (Scanning electron microscope), respectively. XRD analysis shows that the phase of the samples is β-Ni(OH)2. SEM analysis confirms that the low reaction temperature is propitious to the synthesis of β-Ni(OH)2 nanospheres. However, The high temperature is in favor of the synthesis of β-Ni(OH)2 nanosflakes.
Research on Suppression Technology of OFDM Peak-to-Average Power Ratio
Authors: Zhu Xiao Long
Published: March 2012

OFDM has a high peak to average power ratio ( PAPR ), when the signal PAPR over power amplifier ( HPA ) linear dynamic range, will introduce nonlinear distortion, affecting the signal transmission performance. In order to overcome the defects, OFDM need to adopt the corresponding PAPR suppression technique, the signal amplitude changes of power amplifiers in the allowable range. This paper presents a new partial transmit sequence algorithm ( PTS ), double phase sequence reversal threshold algorithm, and simulation results show that the new algorithm on the PAPR suppression effectiveness, search depth of T, the inhibition on PAPR performance.
Intermittent Faults Diagnosis in Wireless Sensor Networks
Authors: Sun Yin Qiu , Feng Hai Lin
Published: March 2012

Sensor node intermittent faults which sometimes behave as fault-free are common in wireless sensor networks. Intermittent faults also affect network performance and faults detection accuracy, so it is important to diagnose the intermittent faulty nodes accurately. This paper proposes a distributed clustering intermittent faults diagnosis method. First, the network is divided into several clusters with the cluster heads should be diagnosed as good. Then, the cluster members are diagnosed by their cluster head. In order to improve the validity of proposed diagnose method, a strategy which collect data for many times is adopted. Analysis of fault diagnosable is given, and simulation results indicate the proposed algorithm has high fault detection accuracy.
An Approximate Algorithm for Shakedown on Gear Contact
Authors: Yuan Yuan , Shi Kun , Liu Kai
Published: March 2012

A model of gear contact has been established based on Hertz theory. Local coordinates are constructed on different meshing points because curvature of gear profile is not constant and then distributions of residual stresses and strains are given. Upper and lower bounds for the shakedown limits have been obtained. An approximate algorithm based on a stress invariant hypothesis and a stress/strain relaxation procedure is developed to solve residual stresses and strains accumulation in elastic-plastic stress analysis of gear contact. The steady-state residual stresses of gear under repeat meshing are calculated. The results are useful information for the strength design of gear.
Modification of Outer Layer of Al-Si Alloys by Doped Fe Atoms
Authors: Chasoglou D. , Pechlivani E.M. , Stergioudis F.
Published: March 2012

The modification of the outer layer of Al-Si alloys doped with iron atoms was examined. The samples both were taken from automotive pistons and they also were prepared in the laboratory. In any case, they were used as basic raw materials for examination. It was found that the structure and properties of these alloys are very much dependent on the cooling rate, composition and heat treatment. The iron atoms are usually doped, in order to diminish and stabilize the thermal expansion coefficient of the alloys. However, this process makes the alloys to become harder and harder; thus leading the alloys to a degradation of their mechanical behavior at elevated temperatures. Optical Microscope observations, SEM analysis of the interactive surface layers and XRD measurements were performed on tested samples. At elevated temperatures a large homogenized zone extended to about 500 (μm) without an apparent distribution of the silicon dendrites or faceted crystals was formed. Moreover at the surface of the so called homogenized zone a layer of about 35 (μm) was formed inside of which iron atoms were migrated. This layer is mainly responsible for scuffing phenomena.
Modeling of High Temperature Flow Stress of AZ80 Magnesium Alloy with Support Vector Machines and Artificial Neural Network
Authors: Lou Yan
Published: March 2012

Support vector machines (SVM) and artificial neural network (ANN) were employed in modeling the flow stress of the AZ80 magnesium. The hot deformation behavior of extruded AZ80 magnesium was investigated by compression tests in the temperature 350-450 and strain rate range 0.01-50 s-1. The maximum relative errors at different temperatures and different strain rates between experimental and predicted flow stresses by SVM and ANN were compared. The results show the SVM derives statistical models have better similar prediction ability to those of ANN, especially at high strain rate. This indicates that SVM can be used as an alternative modeling tool for high temperature rheological behavior studies.
Amorphous IGZO Nonvolatile Memory Thin Film Transistors Using Ta2O5 Gate Dielectric
Authors: Chiu C.J. , Chang S.P. , Weng W.Y. , Chang S.J.
Published: March 2012

A nonvolatile memory thin-film transistor (MTFT) using an amorphous indium gallium zinc oxide (a-IGZO) semiconducting channel and a Ta2O5 gate insulator is proposed. The high-dielectric-constant material Ta2O5 was deposited by e-beaming and used for the charge storage layer, i.e., a metal-oxide-semiconductor (MOS) capacitor. We obtained memory windows (ΔVth = 2 V) at 3-V gate voltage and realized reliable memory operations. Therefore, a-IGZO TFT with Ta2O5 can be employed in integrated high-performance nonvolatile memory devices for applications to transparent displays and flexible electronic devices.
A New Mesoporous Magnesium Borate Microsphere Synthesized Using Sodium Dodecyl Sulfate as Template
Authors: Chen Ai Min , Gu Pei , Hu Jun
Published: March 2012

In this paper, we report a simple strategy for fabricating mesoporous magnesium borate (2MgO·B2O3) microspheres. We employed sodium dodecyl sulfate (SDS) in one system, as a template for the controlled growth of mesoporous 2MgO·B2O3microspheres. The products were characterized by XRD, SEM, TEM, EDS, N2sorption and FT-IR. SEM and TEM observations indicate magnesium borate products are composed of a large number of hollow microspheres, with diameters of 1.0~1.5 μm, which are in fact built from fibers with lengths of 100~150 nm. The N2sorption results show that the products have meso-structures. The average pore diameter is 27 nm. The BET surface area is about 53.03 m2/g, and the pore volume is 0.37 m3/g. It was found that SDS plays a key role for the formation of mesoporous structure. A possible mechanism was proposed to interpret the formation of the mesoporous structure. The mesopores will endow the hierarchical microspheres with novel application potentials.
Preparation of Z-Pin from Different Resin and Evaluation of Interlaminar Reinforcement Effect by Pullout Test
Authors: Ren Hua , Meng Xiang Kang
Published: March 2012

A specific type of bismaleimide resin (BMI) was synthesized and a kind of epoxy resin was formulated to prepare Z-pins reinforced by T300 carbon fiber with diameters of 0.3 mm and 0.5 mm, respectively. Glass transition temperature (Tg) was measured by dynamic mechanical thermal analysis (DMTA) and interlaminar shear strength of Z-pins was tested by short beam shear method. The combination force between Z-pins and laminates was characterized by a special pullout test. The adhesion force/maximum pullout force per unit area between Z-pins and laminates was compared and the combination forces between the Z-pins and laminates were characterized. The results showed that Z-pins based on BMI resin exhibited higher interlaminar reinforcement effect toward T700/5429 composite, concluding that co-bonding between Z-pins and prepreg plays an important role in reinforcing the laminated composites.
Empirical Modeling of High-Speed WEDM Finishing in Gas
Authors: Lu Yu Mei , Wang Tong , Wang Chao Qun , Wang Cheng Wen
Published: March 2012

This paper aims at getting the finishing process models in HS-WEDM in gas. Using cutting speed and the roughnessRaas index, the five factors of pulse-on time, peak current, offset, pulse interval ratio and worktable feed were chosen in dry finishing. The effects of the five factors and their interaction on cutting speed and the Surface roughnessRaand empirical models for cutting speed and roughnessRawere developed by performing a designed experiment based on the central composite design (CCD) experiments, significant order influencing cutting speed and roughness were found. The results of the verification test show thatRaRegression Model and Cutting Speed Regression Model have high reliability, and can achieve significant prediction effect, more accurate mathematical models are provided for the further HS-WEDM process research.
Effect of Aspect Ratio of MWNTs on the Nano-Mechanical Properties of Epoxy Composites Prepared by Electron Beam Irradiation
Authors: Lu Yan Yan , Li Hua , Liu He Zhou
Published: March 2012

In this article, multi-walled carbon nanotubes (MWNTs) of different aspect ratio were used to reinforce epoxy composite. The MWNTs/epoxy composites were prepared by electron beam (EB) curing process. The effect of aspect ratio on the nanomechanical properties MWNTs/epoxy nanocomposites was studied. The results showed that epoxy composites added with 0.25 wt% short MWNTs showed higher nanohardness than pure epoxy and the composite incorporation with the same amount of long MWNTs, within the indentation depth between 1500 and 2000 nm.
Buckling Analysis of a Super-Large Storage Tank
Authors: Bu Fan , Qian Cai Fu , Chen Xue Dong , Yang Tie Cheng
Published: March 2012

In this paper, buckling analysis was carried out on a super-large storage tank under uniform external pressure or wind pressure with finite element method. The critical pressures and buckling deformation modes are obtained and the effects of wind girders and reinforcing rings are investigated. It is found that the critical external pressure of the tank under uniformly applied external pressure obtained by the eigenvalue method is smaller than that obtained by the nonlinear method. Buckling only occurs on the windward side of the tank under the wind pressure. As strengthened by the wind girders and reinforcing rings at the upper par of the tank, buckling deformations here are much smaller than those at the lower part of the tank.
A Manipulator Terminal Actuator Controlled by Microcomputer
Authors: Li Wen Xing
Published: March 2012

In this paper, the terminal actuator of mechanical gripper is designed and calculated. Meanwhile, the computer control program flow chart is given.
P2P Traffic Identification Algorithm Based on Topology
Authors: Sun Ru Xia , Yin Chun Yong
Published: March 2012

The botnet consists of some computers controlled by an attacker and has become a major threat to the internet and users. Because the p2p botnet is a distributed network, making the identification of p2p bots is very difficult. In response to this threat, we present a p2p identification algorithm based on topology. This method only depends on three network behavior features. Our approach has a high detection rate and an acceptable low false alarm rate.
A “L” PCB Image Detection Method Based on Feature
Authors: Luo Xiao Jun , Cheng Tao , Feng Ping , Peng Xiao Bo
Published: March 2012

In this paper, an “L” detection is proposed to check PCB short circuit ,open circuit, raised detect and recessed detect in a Automatic Optic Inspection(AOI). This method were researched and simulated in MATLAB environment, the results showed that it can raise the efficiency and accuracy.
The Methods of Extending the Serve Life of Die Casting Dies in Industry Domain
Authors: Lai Hua Qing
Published: March 2012

Analysis of the casting mold in the casting process of the failure of several major forms of the structure from the die casting and die-casting mold design, manufacturing and processing, material selection, heat treatment technology and the use of die-casting mold, and other aspects of maintenance and maintenance to improve die-casting die life way.
Investigation of Mechanical Properties of Unidirectional Fibrous Composite by Micro-Mechanics Model
Authors: Reza-Kashyzadeh Kazem , Dolati Shokoofeh
Published: March 2012

The use of advanced composite materials reinforced with fibers is expanded in these years. The main reason for the increased use of these materials is their high strength and hardness coefficient, their density and low prices. So, the fiber-reinforced composite materials can be used in the design of structures that require high strength to weight ratio and hardness coefficient. In order to replace these materials and new applications, many research programs to study the mechanical behavior of these materials has shifted. In this paper Finite element model presented in which the fibers and matrix are modeled separately and to show a full description of the properties of the constituent components, the interface between matrix and fiber discontinuity is presented in the model With using modeling and analysis after great determination of mechanical properties of unidirectional fibrous composite single and compared with experimental results, the elastic modulus changes depending on the angle of the fibers is received . The results of this method are compared with available mathematical models.
The Thermal Effect in Wheel and Rail during the Brake of Port Crane
Authors: Wu Jiang Wei
Published: March 2012

With the port crane getting bigger and heavier, and also moving much faster than before, the thermal effect in wheel and rail during the brake process can be a reason of the failure of port crane. In this paper, the thermal effect during the brake process of port crane is studied using the finite element method. Based on the finite element model, the ANSYS10.0 finite element software is used. The thermal effects under different coefficients are discussed. Three different slide speed of wheel, two different loads of crane, and three different frictional coefficients are applied. The importance of the different coefficients is obtained from the numerical results.
Intelligent Fault Diagnosis Method Based on Vector-Bispectrum and SVDD
Authors: Li Ling Jun , Lei Wen Ping , Han Jie , Hao Wang Shen
Published: March 2012

Support vector data description (SVDD) can be used to solve the problems of the insufficient fault samples in the fault diagnosis field. Vector-bispectrum is the bispectrum analysis method based on the full vector spectrum information fusion. It can be used to fuse the double-channel information of the rotary machines effectively and reflect the nonlinear properties in the signals more completely and accurately. In order to realize the aim that the faults of the machines can be diagnosed effectually and intelligently under the situation of the lack of the fault samples, the intelligent diagnosis method of the faults by combining the vector-bispectrum with SVDD is put forward. By using the vector-bispectrum to process the signals and extract the characteristic vectors, which can be used as the input parameters of SVDD. The classification model is set up and therefore the running states of the machines can also be classified. The method is applied to the gearbox fault diagnosis. The results indicate that the method can be effectively used to extract the characteristic information of the gearbox signals and increase the accuracy of SVDD in the fault diagnosis.
Hardware Design of Point for Information Exchange among Multi-Sensor Network
Authors: Yan Shi Hua , He Yong Qiang
Published: March 2012

A transfer module based on TMS320F2812 DSP was designed to meet the needs for information exchange among multi-sensor network. It took the greatest advantages of the multi-imformation exchange interface integrated in DSP, thus to satisfy the requirement for information exchange among various networks. In the present paper, the design of hardware circuit for each single module and interface was described in detail. The data transmission capability of each interface was analysed. As results, the hardware node could run stably with both intense ability to resist interference and high transmission reliability.
Feature Enhancement of Wear Particle Images Based on Curvelet Transform
Authors: Zhang Yun Qiang , Zhang Pei Lin , Wang Guo De , Xu Chao
Published: March 2012

Compared with wavelet transform, Curvelet transform has characteristics of anisotropy and good curve singularity expression abilities. To advance the validity and reliability of wear particle feature extraction as well as recognition, an image feature enhancement method based on Curvelet transform was proposed. Wear particle images were decomposed into different frequency components by Curvelet transform. Scale enhancement coefficients were introduced into the medium-frequency and high-frequency components to enhance images’ edges and details. Then, enhanced wear particle images were achieved utilizing inverse Curvelet transform. Experiment results indicate that the proposed method can effectively improve image quality. As the details and edges are clear, enhanced images are more suitable for feature extraction and recognition.
An Improved Image Edge Feature Extraction Algorithm Based on Ant Colony Algorithm
Authors: Gui Lin
Published: March 2012

In this paper, a new method for the optimization design of ant colony algorithm is used to extract the edge character of the model in the air of the image. The organization is as follows: the second part is a basic ant colony algorithm in the edge of the model feature extraction. The result of the advisory council on AIDS will be compared with the results analysis, and think this is smart operator most edge feature extraction operator. Contrast indicates that the algorithm can effectively edge feature extraction, especially the image.
An Image Segmentation Method Using Image Enhancement and PCNN with Adaptive Parameters
Authors: Cai Hong , Zhang Xue Yuan , Dai Hai Tao , Zhou Dong Ming
Published: March 2012

PCNN model is particularly suitable for image segmentation and edge extraction, but its effect depends on the selection of parameters in PCNN model and network iteration settings, which needs for a large number of artificial interaction and has limited PCNN image processing practicality. In this paper, through combining statistical properties of images and PCNN model, we present an adaptive algorithm based on the distribution of pixels to replace the artificial interaction. Experimental results show that image segmentation using image enhancement and PCNN with adaptive parameters is significantly better than the traditional PCNN image segmentation and verify the effectiveness of the method.
Based on the Fractal Technology of Bad Data Detection Method in Power System
Authors: Li Yan Hong
Published: March 2012

detection and identification of bad data is an important part of state estimation in power system. To solute the problem generates a variety of detection methods and means in academic and industrial circles, commonly used methods include objective function detection, weighted residual detection, measurement suddenly-change detection and the comprehensive application of above methods. In order to detection the bad data from large amounts of data over the multiple sliding windows, bad data detection algorithm is proposed based on fractal technology building monotonic search space. Firstly, it gives the data set on the piecewise fractal model, and then based on this model to design a detection algorithm. The algorithm can reduce detection processing time greatly. The subsection fractal model can accurately model on the data self similarity and compress data. Theoretical analysis and experimental results show that, the algorithm has higher precision and lower time / space complexity, more suitable for bad data detection.
Backstepping Sliding Mode Control for Rocket Launcher Alternating Current Servo System
Authors: Chen Fu Hong , Ma Da Wei , Yang Fan
Published: March 2012

Aiming at wide variations in loads and moment of inertia, large disturbed moment of a rocket launcher position servo system, a backstepping sliding mode control method was present. The proposed method combines the backstepping control with the classical sliding mode control in order to limit the matched disturbances and the unmatched disturbances , which are caused by the gas flow impact and the moment of inertia disturbance respectively. The simulation results show that the proposed approach can guarantee accuracy and increase the response speed and possesses a strong robustness to the matched disturbances and the unmatched disturbances.
3D Model Reconstruction of the Broken Aeroengine Blade Based on the Laplacian of Guassian Detection
Authors: Gong Miao , Wang Hao , Wang Li Wen
Published: March 2012

This paper made the 3D model reconstruction of the J34 turban blade. First, collected rough points cloud data by using visual measuring equipment. Then, smoothed and filtered the point cloud data, took the rational simplification, finished pre-processing the point cloud data. Finally, the Laplacian of Guassian Detection was used for fitting the edge of turban blade, and reconstructed the 3D digital model. The results proved that this method improved smoothness of the model, and reduced time and cost of modeling and machining.
The Numerical Simulation of Flow Field of Target Type Impinging Stream Nozzle Based on Fluent
Authors: Yan Su Qian , Zhang Xiao Fen
Published: March 2012

In this paper, the numerical simulation of internal and external flow field of target type impinging stream nozzle by using Fluent software is observed, the effect on nozzle atomization was obtained by simulating the size of nozzle structure（the diameter d of nozzle and distance δ between the target and plate）and pressure P (that is to say the flow velocity). The results show that: the larger the structure size and the pressure of nozzle，the better the effect of nozzle atomization.That it has superiority than the general centrifugal nozzles and can save water quantity.
Research on Goniometer Fault Detection of a Certain Missile Based on Wavelet Analysis
Authors: Wang Zhu Lin , Mao Jiang Kun , Zhang Zi Bin , Guo Xi Wei
Published: March 2012

Aiming at the problem of existing time-frequency analysis methods was not effective to goniometer keeping fault of a certain missile, combined time -frequency analysis method of CWT and DWT for the fault was put forward based on the fault characteristic. The process of the method proposed was given and the time-frequency method of continuous and discrete wavelet transform was analysed. The signal when goniometer keeping fault occurred was analysed by the method that was put forward. The simulation showed that the method which was effective to the fault detecting could accurately detect the time and location of goniometer fault occurred.
The Multiple AC Servomotors’ Synchronous Operation Control System Based on DSP and FPGA
Authors: Gao Xiao Ding , Nie Zhao Ming , Li Yuan Chao , Wang Jia Jia
Published: March 2012

The multi AC servomotor synchronous operation control system based on DSP+FPGA and a new intelligent PI controller have been designed. The intelligent PI controller can change the structure of controller and parameters dynamically according to the running status of the system, which improves the dynamic performance of the speed control system. In terms of the condition without loading, the experiments about four AC servomotors in different revolving speed have been implemented and The results of experiments show that the system can achieve the high precision control of the operation of multiple AC servomotors synchronously.
Production Research of PLC-Based Disc Motor Punching-Winding Machine
Authors: Li Cheng Qun , Wu Yu Long
Published: March 2012

Disc motor is a kind of motor which have a short axial dimensions and large start torque, it is widely used in machinery and equipment. Production quality of the motor stator and rotor determine the disc motor's performance .The motor stator and rotor which is produced by the method of punching-winding combined, have a high precision of motor underline slot and the motor performances good. Apply the PLC control system on the stator and rotor production, have a high degree of intelligence, easy to operate, realized the automation of the stator and rotor production and increased the productivity.
The Research Status and Development Trend on the Test and Diagnostic Techniques of Engineering Machinery
Authors: Zhang Shu Min , Bi Li Hong , Hui Wen Ming
Published: March 2012

the wide application of engineering machinery in the engineering construction gives important significance on the development of the test and diagnostic techniques of engineering machinery. This article introduces the development and status of the test and diagnostic techniques of engineering machinery and analyses its development trend.
The Design of Web-Based Ear-Nose-Throat Diagnosis System
Authors: Xuan Yong Hua , Liu Wen Tong , Cao Guo Qing , Zhang Ying
Published: March 2012

In this paper, a web-based remote ENT diagnosis system is proposed. This service model encourages busy modem office workers to frequently understand their health conditions using a convenient manner. The software and hardware components are developed for patients and physicians. At the patient site, the EDH is implemented to acquire patients' symptoms and signs, and these symptoms and signs are recorded as video and audio files using a SDRS program. The SDRS program further transmits hese files and data to the VHS. Physicians may review the EPR through conventional web browser. Finally, tentative diagnostic reports are made for patients’ references. Two case studies are tested to verify the quality of remote diagnosis. Experiment results demonstrated that the proposed remote ENT diagnosis systems successful establish similar ENT diagnostic condition compared to face-to-face diagnoses.
Application of MATLAB in Digital Signal Processing
Authors: Liao Cai , Song Yi Mei , Yue Wei Wei , Zhou Dong Bo , Liu Dan Ping
Published: March 2012

The digital filter is one of the most significant applications of digital signal processing (DSP). The design process is very complex involving the model approximation, parameter selection, computer simulation and a series of work. This paper introduces an efficient design method for the digital filter (IIR and FIR) based on the Signal Processing Toolbox of MATLAB, which makes design easy, fast and greatly reduces the amount of design work, and then proves it by practical examples.
Analysis on Automobile Engine Failure Diagnosis Based on Genetic Algorithm
Authors: Gu Jun
Published: March 2012

The max stress is lying on the joint point of the carrier and planetary gear shaft because of the bending deformation of the shaft. The paper mainly introduces a method to analyze the automobile engine failure combining probability causal model and genetic algorithm. This method can quickly and accurately diagnose the complicated problems and troubles. And we have applied this kind of method into finding and diagnosing automobile engine failures and achieved a better results and effects. At the same time, it has also indicated that genetic algorithm works well in automobile failure diagnosis.
Analyze the Efficiency on FDM Process of Rapid Prototyping Technology with the New Filling Method
Authors: Ren Chong , Cao Yi Qing , Fan Li Rong
Published: March 2012

According to consistant thickness of thin-wall kind parts in the paper, based on that is used to two fill paths which are the parallel lines and contour trajectory offset lines to mixed filling of Z direction, and ObjectARX2002 is the second developing tool of AutoCAD2002 which can work out software on VC++6.0. The final software can simulate two filling path, and calculating the length of filling path. And then analyze the efficiency that obtain the conclusion when the new type filling method is used to forming consistant thickness of thin-wall kind parts.The conclusion that the new type filling method can improve the efficiency of Rapid Prototyping in a large extent, and it has a largely practical application value in Rapid Prototyping Technology.
Ecological and Energy Saving Ideas Incorporated in Residential House Design
Authors: Zhao Peng Fei , Tao Bin
Published: March 2012

This paper discusses ecological and energy saving ideas introduced in the course of residential house design, sums up ecological and energy saving design techniques, and analyzes residential house designs in the theme of "Ecological. Growing. Living"
Computing Profile Error of Scroll Wrap Based on the Method of Polar Radius Error
Authors: Yuan Dan Dan , Tu Hai Ning , Liu Guo Ping
Published: March 2012

This paper elaborates on all kinds of existing methods of computing profile error, on account of integrated comparison of all good and bad points, in the context of consistent benchmark for testing and processing, forming the definition of profile error, the article also analyses and proposes a new algorithm which is counting the minimum distance of two profile lines which are least containing the tested profile and paralleling to the academic profile as profile error, and that is the method of counting polar radius error. The experimental results indicate that this method has effectively improved the accuracy and efficiency of computing the profile error of scroll wrap, and it’s suitable to the High-Accuracy measurement and evaluation of scroll.
Design and Analysis of a Lower Limb Rehabilitation Robot
Authors: Shi Xiao Hua , Wang Hong Bo , Yuan Lin , Xu Zhen , Zhen Hong Wei , Hou Zeng Guang
Published: March 2012

The paper present a new lower-limb rehabilitation robot which consists of two mechanical legs with 3 DOF. The length of two mechanical legs and the angle of seat back of the rehabilitation robot can be adjusted over a certain range to fit various patients. The robot can exercise a single joint or multiple joints. It has three training modes: active training, passive training and assist training. In order to evaluate the rehabilitation effect of the robot, all joints were equipped with torque sensors and absolute position encoders. which is very important for the design of the rehabilitation robot. Besides, the rehablitaion traning can combined with sEMG/FES. The robot are installed beside a chair, the patient can sit or lie in the chair, which is more comfortable than standing or suspending. The analysis and experimental results demonstrate that the proposed rehabilitation robot is safe and reliable , the workspace can meets the needs of normal gait.
On the Creative Design of Intellectual Property Protection
Authors: Li Fang
Published: March 2012

The existing intellectual property rights laws and regulations have many limitations to the creativity design’s protection, along with the knowledge economy, information age’s arrival, the creativity design’s science sustainable development takes the safeguard urgently needed with it appropriate match’s legal regime. The article obtains from the creativity design as well as intellectual property protection’s basic property, to analyze its mutual relatedness, in the discussion creativity design the intellectual property protection present situation and the existence question, proposes the consummation creativity protection intellectual property protection system.
Dynamic Characteristics Analysis and Optimization Design of Spindle Box with FEA
Authors: Li Xiao Peng , Wang Wei , Zhao Mi Que , Meng Xiao Chen
Published: March 2012

The simplified finite element modal was established with ANSYS aiming to study the spindle box. The changing regularity of the first 6-order natural frequency of spindle box was studied after the static and modal analysis. Shape optimization design was carried out by taking the maximum deformation of the direction of X，Y，Z as the objective function. The results show that the structure of spindle box after optimization can effectively reduce the maximum deformations of the direction of X，Y，Z，and has better static and dynamic characteristics.
Design, Propulsive Force Prediction and Test of a Electromagnetic Drive Mechanism of a New Concept of Micro Flapping Wing Rotor
Authors: Lu Jing , Fan Ning Jun , Wang Yi Wei
Published: March 2012

To further increase the lift and rotate speed of a micro flapping wing rotor, a electromagnetic mechanism is designed to achieved high amplitude and small friction. Then average propulsive force using Theodorsen’s theory is simulated to confirm the parameter affect. In the end, the relationship of average lift, average propulsive force, rotate speed are shown in the experiment and test results represent that this mechanism has much better performance than PZT one.