bluuebunny/crossref_metadata_2025 huggingface dataset:
Research and Implementation of MELP Algorithm Based on TMS320VC5509A
Authors: Shi Yong Peng
Published: May 2014

A kind of MELP vocode is designed based on DSP TMS320VC5509A in this article. Firstly, it expatiates the MELP algorithm,then the idea of modeling and realization process on DSP based is proposed. At last we can complete the function simulation of the encoding and decoding system,and the experiment result shows that the synthetical signals fit well with the original ones, and the quality of the speech got from the vocoder is good.
The Implementation of SLA Mechanism in Manufacturing Grid
Authors: Li Yu , Yin Yong , Zhang Chao Yong , Hu Fan Hua
Published: May 2014

. In MG environment, resource consumers choose the optimal resource service according to their non-functional demands for quality of service (QoS) in terms of service execution time, reliability, and availability. Non-functional requirements of QoS can be organized and managed by utilizing Service Level Agreement (SLA) standards. In this study, architectures with QoS oriented mechanism with four layers for MG on the basis of SLA are provided. On the basis of the QoS oriented architectures, the management processes of SLA creation, negotiation and matching, monitoring and verification are discussed. Finally, a simple case is provided.
A Discussion on the Innovation of Graphic Advertising Design Curriculum Based on Competition Events
Authors: Peng Jun
Published: May 2014

Graphic advertising design in visual communication teaching is a very inclusive curriculum. This paper is started based on the competition events that the author encountered when teaching graphic advertising design, the role of competition events in promoting the information communication of advertising design teaching is analyzed and the innovative superiority of advertising design teaching in a environment of competition events is introduced in this paper, the misunderstandings existed in the teaching practice of competition events is also discussed, expecting to optimize the combination of graphic advertising design curriculum and competition events.
The Changes of the Corneal Tissue Structures and Biomechanical Properties in the Process of Cornea Post-Embryonic Development
Authors: Hao Shuang , Deng Ai Jun , Wang Guo Hui
Published: May 2014

To investigate the changes of corneal tissues morphological structure and biomechanical properties in different month age rabbits, the eyeballs of the 1 month, 2 month and 3 month-old-New Zealand white rabbits were obtained and getting the cornea tissues, and then measured the thickness of the cornea tissues. The first part of the corneal tissue was used to observe cornea structure with HE staining. The second part was used to observe collagen fibrils by electron microscope. The third part of the cornea tissues were cut into strips and used to test the elastic modulus of the cornea on Instron5544 tester. The thickness of the cornea was increased with month age. HE staining observation shows that the numbers of corneal fibroblasts were decreased and the fiber bundle increased with month age. Electron microscope observation shows that the diameters of collagen fibrils were increased at 2 and 3 month. Biomechanical experiment results reveal that cornea tissues elastic modulus was increased with month age. In the post-embryonic stages, the structure of cornea, the structure and number of collagen fiber, the number of corneal fibroblasts and the biomechanical properties of cornea were changed continually.
Hydrothermal Synthesis and Room Temperature Ferromagnetism of Ni-Doped Rod-Like ZnO Particles
Authors: Hang Lian Mao , Zhang Zhao Ji , Zhang Zhi Yong
Published: May 2014

Ni-doped rod-like ZnO particles with doping concentration of 1 at.% were synthesized at 200°C by hydrothermal method and characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM) and superconducting quantum interference device (SQUID). The results show that the as-synthesized samples are pure hexagonal wurtzite structure without metallic Ni or other secondary phases and display rod-like shape with smooth surface. The magnetization measurements reveal that the Ni-doped rod-like ZnO particles show ferromagnetic behavior at room temperature. The saturation magnetization and coercive field are 0.0046 emu/g and 15 Oe, respectively.
Preparation of Thermo-Sensitive Supramolecular Hydrogels Formed from MPEG-b-PNIPAM-b-MPEG Triblock Copolymer with α-Cyclodextrin
Authors: Ye Xiao Feng , Zhou Mi , Hu Jing Ying , Qian Xin
Published: May 2014

To develop a new drug delivery matrix with the suitable responsive interval, a well-defined triblock copolymer MPEG-b-PNIPAM-b-MPEG was synthesized by reversible addition fragmentation chain transfer (RAFT) polymerization. Then, the supramolecular hydrogels were fabricated via inclusion complexation with α-cyclodextrin (α-CD) and the triblock copolymers in aqueous solutions. The triblock copolymers were characterized by 1H NMR and gel permeation chromatography (GPC), and the supramolecular structures of hydrogels was confirmed by DSC. The resultant hydrogels was found to be thermo-sensitive, and the response interval could be modulated by controlling the content of PNIPAM.
Synthesis, Structure, Luminescest and Thermal Stable Properties of a Silver(I) Coordination Polymer Constructed from 2,4-Dichlorophenoxyacetic Acid and 1,3-Bis(4-Pyridyl) Propane Ligands
Authors: Hao Xiao Min , Chen Gang , Gu Chang Sheng
Published: May 2014

A novel complex of [Ag (poa)(bpp)] n (poa:2,4-Dichlorophenoxyacetic acid;bpp: 1,3-Bis (4-pyridyl) propane) was synthesized and characterized by elemental analysis, IR, X-ray single crystal diffraction. The title complex belongs to Monoclinic system with space group P21/c,a=8.849(4)Å,b=26.654(13)Å,c=9.821(5)Å,α=90°,β=111.257(8)°,γ=90°,V=2158.7(17)Å3,Z=4,Dc=1.619 g/cm3,μ=1.206 mm-1,F(000)=1056. Final indices isR=0.0331,wR=0.0851. Therm al stability and luminescent property of compound have also been nvestigated.
An Improved TOPSIS Method for Material Selection Model
Authors: Huang Wei Fan
Published: May 2014

Material selection problem becomes an important issue in the material science field. It is important for design for mechanical, electrical, thermal, chemical et al. There are several influencing factors in the material selection process, and thus material selection problem is a multi-criteria decision making (MCDM) problem. Relative entropy measure can depict the closeness of the two systems, and then this paper will use it to develop an improved TOPSIS method for the material selection problem. Finally, a practical example is given to demonstrate that the proposed method is effective and feasible.
Synthesis of Acyclovir β,γ-Methylene/Dihalomethylene Triphosphates
Authors: Li Xiao Chuan , Gong Shan Shan , Sun Qi
Published: May 2014

Acyclovir β,γ-methylene/dihalomethylenetriphosphates were efficiently synthesized from acyclovir phosphoropiperidate obtained via the redox condensation with 2,2′-dipyridyldisulfide/PPh3 system. Promoted by 4,5-dicyanoimidazole (DCI), the phosphoropiperidate intermediate exhibited high reactivity toward the bisphosphonates.
Engineering Research on the Design Scheme of Foundation Improvement Engineering of ZhongShan Shipbuilding Base
Authors: Zhang Tong Hui
Published: May 2014

With the purpose of serving the project, this paper studies the foundation improvement in ZhongShan Shipbuilding Base. On the basis of a fairly detailed analysis of the treatment of the landfill scheme, in accordance with its land utilize plan, as well as the construction of rhythm, the pertinence requirement for land, the balance between heaped preloading and backfill, settling amount after construction. By researching dates form experiment area, this paper provides the foundation improvement scheme.
Research on Applied-Information Technology in Hierarchical Network Security Protocols Designing Based on Public Key
Authors: Wang Ying Lian , Ye Jun Yao
Published: May 2014

This paper proposed an applied-information technology in hierarchical network security protocols designing model based on public key, the designing of the protocols is to be completed in several layers. Each sub-protocol achieved a sub-goal that it should complete, and provided data interface to a higher sub-protocol. And then merged the sub-protocol of each layer, to complete the protocols designing. In the previous research, the security of the protocol in applied-information technology was always regarded as a whole, which caused the protocols designing to be tremendous complexity. The hierarchical model in applied-information technology simplifies the process of security protocols designing, and make the protocols designing more clear or less cost, the security proof more simpler.
Application of Information Technology and Printing Materials in Ideological and Political Learning
Authors: Chen Sheng Li
Published: May 2014

Traditional mode of ideological and political education emphasizes that young college learners pass existing moral and legal values to construct their constrained behavior. Rarely does it involve how to guide them to carry out moral and legal issues. However, with the advance of information technology, college learners have more freedom to express their dissatisfaction with real society and understanding of life and browse information they are interested more easily, which makes ideological and political education more challenging. This essay is to study the function and effects of information technology and printing materials in ideological and political education.
Applied-Information Technology in Fusion SVM Partial Least Squares Analysis of Experimental Data in the Body of PET
Authors: Zhou Xian , Xiong Ying , Xiong Wang Ping , Xiong Ling Zhu
Published: May 2014

Experimental data for the human body PET multi-variable, non-linear distribution and other characteristics, the use of fusion partial least squares support vector machine variables effectively extracted from the principal component, reducing the number of variables and the exclusion of noise information to construct a linear regression with the dependent variables model, fitting the model has good accuracy and generalization for PET clinical trials provide effective technical support and research ideas.
Applied Technology in Adapting the Number of Particles while Maintaining the Diversity in the Particle Filter
Authors: Zhi Rui Rui , Li Tian Cheng , Siyau Ming Fei , Sun Shu Dong
Published: May 2014

Determining the required number of particles is a challenging task toward the application of particle filters (PF). As smaller number of particles means faster computing speed while larger number of particles means better approximation ability, it is vital to balance the trade-off between computing speed and approximation quality. Moreover, to match the system requirement that often varies in time, the number of particles should be adapted in time. To achieve these, an Adaptive Deterministic Resampling (ADR) is proposed in this paper. The new resampling employs techniques combine Deterministic resampling and Kullback–Leibler Divergence (KLD)-resampling (both with slight changes made) and gain their respective advantages, which not only allow online adaptation of the number of particles according to the system requirement but also guarantee the diversity of particles. Simulation results demonstrate and confirm the validity of our approach.
Embedded Computer Performance Evaluation Model Based on Weight Contact Coefficient
Authors: You Yong Bin , Zhao Shan Shan , Jing Rui Jun , Liu Li Yan
Published: May 2014

Because the embedded computer performance evaluation indexes are uncertainty, the better method of embedded computer performance evaluation is proposed by applying the set pair analysis theory. First, identical degree, different degree, and contrary degree are respectively determined by the optimal program, intermediate program and worst program, and the weight of performance evaluation indexes are determined by order relation analysis. Finally, the weight contact coefficient is obtained, and the sort of embedded computer performance is determined by situation of weight contact coefficient. The experimental results show that this method can effectively evaluate the embedded computer performance, and the evaluation results are in line with the actual situation.
Automatic Optimization Algorithm of Clusters Number Based on Maximum Distance
Authors: Zhou Hong Bo , Gao Jun Tao
Published: May 2014

K-means clustering algorithm clusters datasets according to the certain clustering number k．However k cannot be confirmed beforehand.A new clustering validity index was designed from the standpoint of sample geometry.Based on the index a new method for determining the optimal clustering number in K-means clustering algorithm was proposed．
A Sensor Detection Experiment System Based on Network Virtual Instrument
Authors: Zhang Jun , Liu Yuan Sheng , Xue Lin
Published: May 2014

A sensor detection experiment system based on network virtual instrument is presented in this paper. The hardware system consists of virtual instrument server, detecting server, data acquisition card, sensor experiment box, sensor modules, several PC terminals and network equipment. The Client/Server structure and Browser/Server structure are combined to create a new structure, i.e. Browser/Server/Client structure in this system. LabVIEW is used to develop the software of the system. The system can realize the remote control and real-time detection of the sensor experiment box and laboratory instruments. It has been used for the students majoring in electronics of Beijing Union University and can provide true lab environment for the experimenters remotely.
The Numerical Simulation of behind Armor Debris by Shaped Charge Jet Penetration
Authors: Liu Bo , Yao Zhi Min , Liu Guo Qing
Published: May 2014

In order to study the aftereffect of the target plate penetrated by shaped charge jet , with the help of nonlinear dynamics solver AUTODYN, the SPH algorithm was adopted to simulate the whole process of jet penetrating the armor plate with different thickness under the condition of vertical. Results show that while the jet head perforating the plate, the behind armor debris (DAB) cloud will be formed, and the axis of symmetry of the "ellipsoid" is the jet direction. However, with the increase of target plate thickness, the behind armor debris number reduced, largest fragment emission angle also reduced.
Information Technology in Human Physiological Signal Monitor System Based on Atmega328
Authors: Yao Qing Hua , Cao Miao
Published: May 2014

This paper introduces a human physiological signal monitor system based on Atmega328. Heart sounds and electrocardiogram of the human body can not only be acquired and processed timely but also stored and displayed. It is composed of superior microprocessor—Atmega328,large capacity flash and the new type LCD, which adopt low power design and surface mounting package. The advantage of the system is compact and high intelligence. A model for automatic arithmetic is established for the feature extraction of human physiological signal. This system can record human physiological information in succession for 56 hours and store the no compression data synchronously. Many diseases can be diagnosed according to the system automatically. The measurement results achieved from this system are dependable, so the diagnosing results are accurate and the waveforms are no distortion. This system used necessary doesn’t affect the daily living and working, so it is suited for clinical and family monitoring.
Mechanical Research with PID Parameters Tuning Based on MATLAB/Simulink
Authors: Huang Qing Qing , Wu Tao
Published: May 2014

The PID parameters tuning is to determine the proportional coefficient Kp, integral time Ti and differential time Td of the regulator. It is a very complicated and cumbersome process. This paper describes the strategy and the steps of the critical proportion method, and completes the simulation of PID parameters tuning by using the critical proportion method in the MATLAB/Simulink. The simulation results verify the effectiveness and feasibility of the method. Using the software to tune PID parameters can easily modify the simulation parameters, save a lot of computation and programming, and greatly reduce the workload.
Structure Improvement of Gear Generating Based on Involute Tooth Profile and Mechanical Properties
Authors: Wang Mei , Zhang Jie
Published: May 2014

Through the experiment, the defects of existing involute gear Shaping machine structure and operation are analyzed, and the structure is improved, and achieved good results; the change of shape, to expand the scope of the processing of the number of gear teeth. Gear Shaping machine improved using more standard, more convenient and its manufacture and repair.
Analysis of Temperature Field on Ceramic Dry Granulation Machine
Authors: Wu Nan Xing , Bao Xing , Liao Da Hai , Xiao Zhi Feng
Published: May 2014

In the paper, we establish a 3D mathematical model of granulation chamber based on experimental data and “two phase flow” theory, simulate the process of dry granulation and study the temperature field of granulation chamber. The analysis result shows that granulation time must be controlled in 6 minutes, otherwise the plasticity of particles will be damaged and the final effect of granulation will be influenced.
Modal Analysis of Crane Girder Based on ANSYS Workbench
Authors: Peng Ran , Qin Xiao Yu
Published: May 2014

Finite element modal analysis of main girder of bridge crane is conducted, the natural frequencies and the vibration-made vectors of the first 6 orders are obtained, and the vibration hazardous areas are found. It provides a theoretical basis for optimal design and dynamics analysis for girder. The natural frequency and mode shape animation of the modal analysis can be used as the optimal design reference of the girder. Rational optimization of girder is able to avoid the resonance frequency region, which will help to improve the reliability and life-span of the girder.
Modeling and Optimized Design of a New Multi-DOF Deflection Type PM Motor
Authors: Li Zheng , Zhang Lu , Lun Qing Qing
Published: May 2014

Based on the finite element analysis software, this paper innovatively proposes a multi-DOF deflection type PM motor with "6-8" rotor-stator structure and builds its finite element model. Furthermore, the distribution of the magnetic field of this motor are analyzed and calculated. To obtain better performance, the motor’s structure is optimized and designed with response surface methodology (RSM). Results of the proposed structure configuration are analyzed and compared with the initial model. It is expected that this research can be helpful to the multi-DOF motor or actuator technology study and improvements.
Preparation and Photocatalytic Properties of ZnO Thin Films
Authors: Wu Han Shui , Wang Ying Lian
Published: May 2014

Highly photoactive ZnO thin films on glass substrates and quartz substrates have been prepared by sol-gel process. Structural features, surface morphology and UV absorption spectrum have been studied by XRD, SEM and UV-Vis scanning spectrophotometer. The influence of degradation temperatures, original concentration of phenol and air flux on degradation rates have also been studied. And the results show the best conditions, degradation temperature is between 25oC and 45 oC, air flux is 40ml/min, the lower original concentration, the higher degradation rates. Excellent adhesion as well as recyclable and efficient in phenol degradation of ZnO thin films were found in this experiment.
Structure of Carbon-Coated Graphite and its Application in Nuclear Industry
Authors: Xing Wan Li , Wang An Jian , Chen Qi Shen
Published: May 2014

High Temperature Gas-cooled Reactor is one of the candidates for the next generation advanced nuclear energy systems. As high temperature gas cooled reactor neutron moderator, reflector and structural material, nuclear graphite is very important in the nuclear industry to assure the safe operation of the reactor. The oxide reactor of nuclear graphite will change its internal pore structure and properties, such as mechanics properties, thermodynamic performance, radiant resistance, and so on. In this study, graphite coated with carbon was prepared by liquid impregnation method. Infrared spectral radiometry (FTIR), scanning electron microscope (SEM) and thermal gravity analysis (TGA) methods were used to characterize the structure of the carbon-coated graphite. Neutron absorption test method was also used to test the resistance to radiation. The results show that when the heat treatment time was 6h with the heat treatment temperature was 500¡æ, the material had the best morphology and had the largest neutron adsorption area (4.63 mb). The results suggest that this carbon-coated graphite has very good application prospect in nuclear industry.
Synthesis and Properties of a New Diarylethene1-[2-methyl-5-(10-phenanthrenyl)-3-thienyl]-2-[2-methyl-5-(4-formylphenyl)-3-thienyl]perfluorocyclopentene
Authors: Duan Fang , Pu Shou Zhi
Published: May 2014

A new photochromic diarylethene based on a phenanthrene, which is named 1-[2-methyl-5-(10-phenanthrenyl)-3-thienyl]-2-[2-methyl-5-(4-formylphenyl)-3-thienyl] perfluorocyclopentene, was designed and constructed successfully. At the same time, its photochromic properties, kinetics and fluorescence switch were investigated in detail. The results indicated that its photochromic behaviors could be modulated by UV/Vis light, changing from colorless to blue in dichloromethane solution. What is more, the kinetic experiments illustrated that the cyclization/cycloreversion process of this compound was determined to be the zeroth/first reaction. Furthermore, the optical switch experiment illustrated that the diarylethene1ofunctioned as a remarkable fluorescent switch.
Green Synthesis of Magnesium Oxide Nanoparticles
Authors: Suresh J. , Yuvakkumar R. , Sundrarajan M. , Hong Sun Ig
Published: May 2014

Nephelium lappaceum L. peels was effectively used for the synthesis of magnesium oxide nanoparticles as a natural ligation agent. The XRD and SEM revealed the crystallinity and spherical morphology of the biosynthesized nanoparticles. The size of the particles was found to be 60-70 nm as deduced from XRD and SEM analysis. The particle size of as-synthesized magnesium oxide powders measured by PSA was approximately 100 nm. The successful formation of magnesium oxide nanoparticles was confirmed employing XRD, SEM-EDX and PSA analysis.
Application of Decorative Materials in Indoor and Outdoor Landscape Design Based on Straps Art of Shui National
Authors: Zhang Chao , Zhu Xiao Jun
Published: May 2014

The decorative materials in Shui national straps art, has strong modeling and regional characteristics. The materials’ visual feature provides creative inspiration to modern landscape design. This paper analyzes the characteristic of these materials, as well as the cultural connotation of Shui national straps art. The design method of indoor and outdoor landscape using decorative materials derived from straps art is proposed. Finally, some typical cases are given to demonstrate the design effectiveness.
Simulation of Expansive Stress in Cement-Based Materials Subjected to Sulfate Attack
Authors: Yin Guang Ji , Zuo Xiao Bao , Sun Xiang Hua , Tang Yu Juan
Published: May 2014

For the volume expansive of cement-based materials subjected to sulfate attack, based on microporous mechanics, the model of representative volume element (RVE) is established to analyze the distribution of microcosmic expansive stress in RVE. By homogenization method, the macroscopic equivalent stress of RVE is analyzed. The results show: on the microcosmic scale, the stress of internal sphere in RVE in all directions is compressive, and the radial stress of spherical shell is compressive, but the hoop stress is tensile; on macroscopic scale, the radial equivalent stress is compressive, the hoop equivalent stress is tensile.
Research on Material Selection with Multi-Attribute Decision Method and G1 Method
Authors: Xie Xue Jun
Published: May 2014

The selection of an optimal material is an important aspect of design for mechanical, electrical, thermal, chemical or other application. Many factors (attributes) need to be considered in material selection process, and thus material selection problem is a multi-attribute decision making (MADM) problem. This paper proposes a new MADM method for material selection problem. G1 method does not need to test consistency of the judgment matrix. Thus it is better than AHP. In this paper, firstly, we use the G1 method to determine the attribute weight. Then TOPSIS method is used to calculate the closeness of the candidate materials with respect positive solution. A practical material selection case is used to demonstrate the effectiveness and feasibility of the proposed method.
A Lightweight Body Frame Conceptual Design of a Mini Electric Vehicle
Authors: Jin Da Feng , Chen Xiao Qi
Published: May 2014

To realize the lightweight structure, a car body frame conceptual design of a mini electric vehicle was performed with topology optimization and size optimization. Topology optimization was used to search load paths and size optimization was applied to model a simplified structure. Static stiffness, crash safety and free vibration conditions were considered simultaneously in both of the optimization phases. Due to the feature of conceptual design, crashworthiness cases were regarded as static stiffness ones with inertia relief analysis for a linear equivalent. The objective function in multi-objective topology optimization was defined by Compromise Programming Method in OptiStruct. Because of the characteristic of the geometry and the manufacturing constraints of profiles, the design variables in size optimization were defined as both continuous and discrete variables. The resultant structure outperforms the original one in many structure responses and most significantly, it reduces weight by 36%, which demonstrates the efficiency of the proposed method.
A Research of Multimode Microbending Optical Fiber Pressure Sensors Based on Different Gasket Structure
Authors: Mo Shu Hua , Yu Dong , Wang Guo Xing , Wang Li Xue
Published: May 2014

Microbending optical fiber pressure sensor is designed with the sensing unit based on multimode fiber in this paper. It consists of the pressure gasket, the microbending regulator and the metal clamp with fine adjustment structure. The measuring range of the sensor could be adjusted by choosing different gasket. When pressure acts on the fixture, a little displacement may occur, and luminous flux of the fiber will be lost after going through microbending part. According to the principle of light field detection, the pressure measurement can be achieved by detecting the loss of light intensity caused by different load. The basic structure of the sensor and its sensing mechanism are well introduced in this paper. In addition, for improving the effectiveness of the Microbending optical fiber pressure sensors, we set up mechanical zero adjustment and the maximal displacement limitation in order to avoid sensor breakdown caused by excess displacement.
Mechanical Design and Control with Human Factors in Ship Design: Improving Ship Environmental Impact Towards a Green Policy
Authors: Abdelkhalek Hany , Han Duan Feng , Gao Liang Tian , Hanafy Ehab
Published: May 2014

Decades of engineering practice have undoubtedly proven that the human operator is a complex variable that warrants significant consideration during the first stages of design and throughout the entire operational lifetime of a system. However, human factors are frequently neglected during the design process and during the systems operation. When human factors are not adequately addressed, people make errors and safety is severely compromised, the consequences of which are well documented. However, the process of integrating human factors into the design process is still maturing. Fortunately, there are ways for the designer to effectively screen and select which human factors elements should receive consideration for a particular project. Human stressors one of Elements should be included, specially factors that cause fatigue and human error.Noise and vibration are important reasons which cause human fatigue and has a significant impact on human performance. The international regulations, ship owners and many countries give a serious concern to this issue specially when designing a new ship to gain the "Green policy" or "Green ship" label by reducing and enhancement ship environmental impact, they adopted technological methods and solutions to achieve that goal. In this paper we will present a review for those methodologies and design procedures for new vessels to enhance this issue as a green policy, which reflect many benefits on human stressors, in order to activate and enrich the role of human factors in ship design.
Research and Development of Automatic Control System for High Precision Cold Strip Rolling Mill
Authors: Sun Wen Quan , Shao Jian , Song Yong , Guan Jian Long
Published: May 2014

The automatic control system is one of the most important parts of improve cold rolling strip precision and increase the automate level. The improved cold strip mill process control system has been developed and successfully applied to several new cold strip production lines. This paper introduces the Key Technical Features and New Technology of the system include the system architecture, hardware configuration and new control algorithms, etc. System operation and actual production proves that the system has the features of shorter commissioning time, convenient maintenance, high reliability, high automatic level and control precision.
Information-Applied Technology in BP Neural Network Regression Algorithm with Feature Extraction Using Partial Least Squares
Authors: Zhang Xiao Hua , Li Hua Ping , Qiao Ke
Published: May 2014

A hybrid modeling algorithm based on partial least squares and neural network (BP algorithm) is proposed. First it extracts the feature from the original sample sets by partial least squares mehtod, and then the neural network regression using the extraction sets obtained is performed. Thus the hybrid modeling algorithm has the ability of feature extraction. The experiments results on the properties of engineering materials shows that the proposed hybrid algorithm can effectively modeling the properties of engineering materials with merits of dimensions reduction, elimination of noise and multiple correlations between independent variables.
Research on Applied Technology with a Continues Method for Unit Commitment Problem
Authors: Yang Lin Feng , Li Jie , Ge Zhi Hui
Published: May 2014

A continue method based on relaxation is applied to solve the unit commitment problem (UCP). At first, the primal UCP is reformulated as a simple mixed integer quadratic programming (MIQP), and then the MIQP is solved by interior point method (IPM) and commercial software CPLEX. The first continues problem, UCP without integer constraints, can be solved by IPM to get the no integer solution. The second continues problem, an equivalent continues problem of UCP, can be solved starting from the solution obtained in first problem.
Research on Mechanical Engineering with Lightweight Design for a Car Body Frame
Authors: Jin Da Feng , Zeng Duo
Published: May 2014

This paper develops a novel approach for the lightweight design of a car body frame. In this approach, the cross-sectional dimensions of a car body frame are treated as design variables. First, sampling points are created based on Latin Hypercube Sampling (LHS), and then Design of Experiment (DOE) is conducted. After that, an analysis is done to obtain those design variables affect the results most. Finally, Sequential Quadratic Programming (SQP) is utilized to solve the optimization problem while the amount of design variables is reduced according to the former analysis. The advantage of this method is that it reduces the burden of optimization algorithms and offers a practical way for the lightweight design of a car body frame.
Study on Eye Movement Technology Website under Eye and Eye Tracking Analysis Based on Thermodynamic
Authors: Chen Le Yang , Zhang Fan
Published: May 2014

Nowadays, so many people are talking about the user experience of the website (UE or UX) and interface design called UI and so on, so let’s analysis the interactive pages by eye thermodynamic diagram and eye tracking based on Eye Tracking Technology.
The Design of Query Processing in Data Stream Management System
Authors: Zhai Hong Yu , Li Li , Xu Hong Hua
Published: May 2014

data stream management system is used to manage and query coming large, continuous, fast and flexible data stream. The system is based on the flow of data extraction, transformation, combination, which is the main content and task query execution. This paper mainly discusses the design and implementation of query execution module and query execution is composed of two parts which include query operations, query execution and scheduling.
The Research of N/C-Codoped TiO2 Films Deposited by Arc Ion Plating
Authors: Zhang Shu Juan , Li Ming Sheng , Cao Chong , Zheng Lin Xia
Published: May 2014

The N/C co-doped TiO2thin films were successfully deposited on medical glass slide by pulsed negative bias arc ion plating. The influence of pulsed negative bias, annealing temperature on films properties was investigated. Film structure, surface morphologies and optical properties were measured with XRD, SEM and UV-VIS transmittance spectroscope. The results show that the most absorption edges of the as-deposited films increase with the rising of the pulse negative bias, and the maximum of 540 nm is achieved under-600V bias. The films absorption edges increase in different degree after annealing at 400°Cfor 2h and 4h, and the best extension can increase 46nm after annealing. The interaction of the annealing treatment and bias functions enhance the N and C reaction activities and extend absorption edge. The greatest absorption edge dater of the co-doped TiO2films under the negative pulse bias for 0V can reach 550nm after the annealing at 400°Cfor 2h. The crystal morphology become inconspicuously with the bias increasing from 0V to-300V, which is corresponding to the XRD result, the anatase diffraction peaks weaken obviously.
Synthesis and Properties of a Novel Unsymmetrical Diarylethene{1-[2-methyl-5-(10-phenanthrenyl)-3-thienyl]-2-{2-methyl-5-[4-(2-(1,3-dioxolane))phenyl]-3-thienyl}} Perfluorocyclopentene
Authors: Duan Fang , Liu Gang
Published: May 2014

A novel unsymmetrical isomeric photochromic diarylethene based on phenanthrene unit, {1-[2-methyl-5-(10-phenanthrenyl)-3-thienyl]-2-{2-methyl-5-[4-(2-(1,3-dioxolane)) phenyl]-3-thienyl}} perfluorocyclopentene (1o), was designed and synthesized. Its properties were investigated in detail, including photochromic, kinetics and fluorescent. The results showed that the compound exhibited excellent photochromism, changing from colorless to violet after irradiation with UV light in solution. What is more, the kinetic experiments illustrated that the cyclization/cycloreversion process of this compound was determined to be the zeroth/first reaction. Furthermore, the fluorescence intensity of the photochromic diarylethene1odeclined dramatically.
Temperature Dependent Magnetic Properties of Co-P Films
Authors: Lu Nian Duan , Li Ling , Liu Ming
Published: May 2014

The magnetic properties of Co-P films with different structure depended on the temperature were investigated. The Co-P films happen to the transition from the weak ferromagnetic to the strong ferromagnetic at lower temperature. At higher temperature, the Co phase transformation from HCP to FCC crystal structure results in a sudden change of the magnetization of the nanocrystalline Co-P films. For the amorphous Co-P films, the occurrence of the crystallization at 610 K leads to a magnetization transition. The first-principles calculations shows that the intense exchange coupling of Co-Co and Co-P atoms from the Co and the Co2P phase contributes to the magnetic property.
Synthesis and Properties Study of 1-(2,4-dimethoxyl-5-pyrimidinyl)-2-[2-methyl-5-(4-n-pentylbenzene)-3-thienyl] Perfluorocyclopentene
Authors: Liu Jing Jing , Jia Hong Jing , Pu Shou Zhi
Published: May 2014

A novel photochromic diarylethene based on a six-membered pyrimidine moiety 1-(2,4-dimethoxyl-5-pyrimidinyl)-2-[2-methyl-5-(4-n-pentylbenzene)-3-thienyl] perfluorocyclopent-ene has been synthesized. Its properties, including photochromic behavior and fluorescent properties, have been investigated. The compounds exhibited remarkable photochromism, changing from colorless to red after irradiation with UV light both in solution and in PMMA film. The fluorescence had a remarkable initial increase with subsequent dramatic decrease with increasing concentration. The results indicated that the pyrimidine moiety played a very important role during the process of photoisomerization reactions.
Synthesis and Photochromic Properties of Diarylethene 1-[2,4-dimethyl-5-thiazolyl]-2-[2-methyl-5-(2-methylphenyl)-3-thienyl]perfluorocyclopentene
Authors: Xue Dan Dan , Zheng Chun Hong , Pu Shou Zhi
Published: May 2014

A new unsymmetrical photochromic diarylethene, 1-[2,4-dimethyl-5-thiazolyl]-2-[2-methyl-5-(3-4-trifluoromethylphenyl)-3-thienyl] perfluorocyclopentene (1o) was synthesized, and its properties, such as photochromism in solution as well as in poly-methylmethacrylate (PMMA) amorphous film, and fluorescence properties were investigated in detail. The results showed the compound exhibited good photochromism in hexane solution and in PMMA amorphous film, the maxima absorption of its closed-ring isomer1care 490 nm and 495 nm respectively. The open-ring isomer of the diarylethene1oexhibited relatively strong fluorescence at 449 nm in hexane solution (2 × 10-5mol/L) when excited at 330 nm and at 438 nm in PMMA amorphous film when excited at 280 nm. The fluorescence intensity decreased along with the photochromism upon irradiation with 297 nm light.
Synthesis, Photochromism and Fluorescent Switch of a Novel Diarylethene Compound
Authors: Xu Hong Yan , Dong Xiao Rong , Pu Shou Zhi
Published: May 2014

A new fluorescence switch molecule based on a photochromic diarylethene and a fluorene unit was designed and constructed successfully. The compound exhibited good photochromism in acetonitrile with alternating irradiation by UV/Vis light, and the maxima absorption of its closed-ring isomer (1b) are 565nm. The open-ring isomer of the diarylethene1aexhibited relatively strong fluorescence at 420 nm when excited at 290 nm. Its fluorescence intensity decreased along with the photochromism from open-ring isomers to closed-ring isomers upon irradiation with 297 nm UV light.
Behavior of the Nano Alumina Powder Conformed by Slip Casting under Microwave Sintering
Authors: Arellano A. , Lemus-Ruiz J. , Bouvard D. , Olmos L.
Published: May 2014

The effect of the transformation of phase in nanopowders of transition alumina has showed to be detrimental for the final characteristics of the consolidated materials. It was found that the complete transformation from gamma (γ-Al2O3) to alpha (α-Al2O3) alumina generated larger grain sizes and lower relative densities. This work studies the effect of slip casting preformed on the transformation phase of alumina during microwave sintering of α-alumina nanopowders. The sintering of the samples was carried out in a typical unimodal microwave furnace with a 2.5 GHz frequency. Sintering was carried out under air atmosphere at temperatures vary between 1100 and 1500 °C with heating rate of 100 and 200 °C/min and with a sintering plateau of 5 minutes. Sample characterization was performed by XRD, SEM, and TEM. The phase quantification was calculated using the Rietveld software from the XRD patterns. To have a good heating control in the microwave system it is possible by using slip casting to preform compact. It was observed that the heating rate has a strong effect on the phase transformations. Secondary phases like θ, θ’(x, y) appeared in samples sintered with a heating rate of 200 °C/min no matter the sintering temperature. Meanwhile the complete alumina transformation was found when sample were heating at 100 °C/min.
Characterization of Constrained Sintering of Powders on Solid Substrate
Authors: Olmos L. , Lemus-Ruiz J. , Vergara-Hernández Héctor Javier , Jimenez O. , Salgado J.M.L. , Tena-Martinez J.J.
Published: May 2014

Nowadays, sintering is a very useful technique to fabricate metal, ceramic and composites parts for different applications. This phenomenon has been extensively studied over 50 years and, most of the research related to it used a model based on two contacting particles. However, just a few jobs were focused on the powder sintering on a solid substrate. This work investigates the effect of two parameters; substrate shape and inclusion of the reinforced particles on the evolving microstructure during sintering of particles on a rigid substrate. Powders and solid bars of copper are used as a model material and particles such as tungsten carbide (WC) as reinforcing particles. Sintering was performed in an electrical furnace at 1050 °C under reducing atmosphere. The progress on sintering was evaluated by measuring the relative density close and far from the solid substrate by means of the image analysis from pictures taken by scanning electronic microscope (SEM). The effects on the constraint sintering were also identified. Heterogeneous densification and delamination of the film from the substrate were observed as densification increased which by the way is reduced by the inclusion of the reinforced particles.
Corrosion Behavior of Low Carbon Steel Exposed to Different Soils
Authors: Quej-Aké Luis M. , Marín-Cruz J. , Galván-Martínez Ricardo , Contreras-Cuevas Antonio
Published: May 2014

In this work the corrosion process of X52 pipeline steel in three different Mexican soils was studied. Sandy, clay and marshy soils were studied in function of moisture content. The results were related to the different stages (dry and rainy) that underground pipelines suffer during the season of the year. The electrochemical evaluations were carried out at different periods of time. The soils evaluated have different water retention and each soil has a moisture value in which the corrosion process is more active. However, this value for the marshy soil only belongs to the maximum value of moisture. The analysis of results, suggested that the corrosion phenomenon is different for each soil. The electrochemical results shown that, there was a moisture value on each type of soil that it accelerates the corrosion phenomenon. So, there is moisture content where the corrosion rate is maximum (12.7, 31.4 and 53.1 wt% H2O, for the sandy, clay and marshy soils, respectively), obtaining values of 0.256, 0.294 and 0.383 mm/year. Furthermore, this paper propose the use of the electrochemical techniques as a complementary tool for the analysis of the cathodic protection in underground pipelines at different stages of season of the year, due to the voltage variations in different types of soils and different moisture content.
CuAl2 Intermetallic Alloy Subjected to the Hydrogen Embrittlement Reaction by Using Mechanical Attrition in Water
Authors: Hernández-Torres Ares G. , Mares-Briones F. , Romero-Romero J.R. , Rosas G.
Published: May 2014

Al based intermetallic materials are commonly susceptible to hydrogen embrittlement reaction. Water vapor in the air reacts with the aluminum in the alloy and releasing hydrogen. Thus, the aid of this work is to know how much hydrogen can be released when the embrittlement reaction is induced inside the milling container. For this purpose the CuAl2 intermetallic material was made by conventional castings methods and then subjected to high-energy ball milling in water. The samples were characterized by X-ray diffraction pattern, attenuated total reflectance spectroscopy and scanning electron microscopy (SEM). After the milling process, the amount of hydrogen released was correlated with the other reaction products obtained during the reaction. These products were primarily aluminum hydroxides. The amount of hydrogen that can be released is similar to the theoretical amount possible that can be released.
Electrochemical Noise Study on Corrosion of Low Carbon Pipeline Steel in Sour Solutions
Authors: Galván-Martínez Ricardo , Orozco-Cruz Ricardo , Mendoza-Flores Juan , Genesca-Llongueras Joan , Contreras-Cuevas Antonio
Published: May 2014

Electrochemical Noise (EN) measurements for low carbon pipeline steel (X52) samples were carried out in 3.5% NaCl aqueous and NACE solutions. Both testing solutions were saturated with hydrogen sulphide (H2S) at 20 and 60 oC, under static conditions. EN data was analysed in the time domain. Parameter such as Electrochemical Noise Resistance (Rn) and Localization Index (LI) were determined from the analysis in the time domain. Also, Rn results are compared with traditional Linear Polarization Resistance (LPR) data. A superficial analysis was carried out by a scanning electron microscopy (SEM) with Energy Dispersive X-Ray analyses (EDX). A good correlation was observed among the used techniques and relevant electrochemical data related to the corrosion phenomena was obtained. According to Rn, the corrosion rate (CR) values of the steel sample immersed in 3.5% NaCl are higher than the CR of the steel samples immersed in NACE solution. The morphology of the corrosion process obtained by SEM was a localized type and this behaviour was corroborated by the results obtained by LI where these LI values are 1 or close to 1.
Modeling of Surface and Size Effects on Various Shape of Spin-Crossover Nanoparticles
Authors: Muraoka Azusa , Boukheddaden Kamel
Published: May 2014

We performed of Monte Carlo simulations using Ising-like model on two-dimensional core/shell rectangular lattice L×2L for different sizes in order to study the effect of surface and size on the thermal behavior of spin-crossover nanoparticles. The surface effect is accounted for by constraining all the atoms situated in the boundary in the high-spin state as a result of the weak ligand-field prevailing in the coordination shell. This result is similar to square lattice of spin-crossover nanoparticles, and in agreement with experimental data. Such a non-trivial change is explained as due to the competition between the negative pressures induced the high spin state surface and the bulk properties. We also described the way in which the usual occurrence condition of the first-order transition has to be adapted to the nanoscale.