bluuebunny/crossref_metadata_2025 huggingface dataset:
A Macrocyclic Peptide that Serves as a Cocrystallization Ligand and Inhibits the Function of a MATE Family Transporter
Authors: Hipolito Christopher , Tanaka Yoshiki , Katoh Takayuki , Nureki Osamu , Suga Hiroaki
Published: August 2013

The random non-standard peptide integrated discovery (RaPID) system has proven to be a powerful approach to discover de novo natural product-like macrocyclic peptides that inhibit protein functions. We have recently reported three macrocyclic peptides that bind to Pyrococcus furiosus multidrug and toxic compound extrusion (PfMATE) transporter and inhibit the transport function. Moreover, these macrocyclic peptides were successfully employed as cocrystallization ligands of selenomethionine-labeled PfMATE. In this report, we disclose the details of the RaPID selection strategy that led to the identification of these three macrocyclic peptides as well as a fourth macrocyclic peptide, MaD8, which is exclusively discussed in this article. MaD8 was found to bind within the cleft of PfMATE’s extracellular side and blocked the path of organic small molecules being extruded. The results of an ethidium bromide efflux assay confirmed the efflux inhibitory activity of MaD8, whose behavior was similar to that of previously reported MaD5.
Cartographie successive des entreprises métallurgiques dans les Pyrénées nord-catalanes ; support préliminaire à l'étude éco-historique des forêts charbonnées
Authors: Izard Véronique
Published: August 2013

The historic approach of the mountain environment, and this of the dynamic evolution of theforest settlements, which are characterized by the charcoal metallurgy, is included in a combined research project. The successive cartography of the geographic implantation of the iron and steel industry, constitutes a preliminary source document necessary for the study of paleosettlements in the Catalan Pyrénées. The forest, long considered as an inexhaustible energy source, has been in the heart of the protoindustrial economy. Victim of the "charcoal-burners axe", it still shows the scars of a centuries old exploitation, the marks of which are to befound everywhere in the landscape.

Through this study, the spreading of the iron and steel industry, arises quite clearly, both in space and in time, and its repercussions of the environement also appear. It shows a coherent image of the " iron-landscapes ", integral part of the Catalan patrimony.
Les fortifications médiévales de la place du Vigan à Albi (Tarn)
Authors: Grimbert Laurent
Published: August 2013

In spring 1999, the excavations on Vigan square in Albi brought to light several elements of fortification linked to the near presence of a gate and integrated into a barbacane-type complex. Archaeological analysis allows an attempt at chronological evaluation of this defensive system. The first device, based essentially on a system of ditches, seems have been put in place during the XIVth century. Reorganisations connected to the evolution of armament and siege techniques, were then carried out until the XVIth century. From this date, a slow loss of interest in the defensive system becomes apparent. In spite of a renewal of interest in this area, with the construction of an expressive gate in the middle of the XVIIth century, this slow abandonment ends with the definitive dismantling of the defences in the second half of the XVIIIth century.
Le castrum déserté de Ventajou et son terroir (Félines-Minervois, Hérault) : première approche (Ve-XIVe s.).
Authors: Loppe Frédéric , Marty Robert , Zanca Jean , Bailly-Maître Marie-Christine , Barrere Michel , Bessac Jean-Claude , Débax Hélène , Boudartchouk Jean-Luc , Dieulafait Francis , Forest Vianney , Zammit Jean
Published: August 2013

Le castrum de Ventajou est situé sur la commune de Félines-Minervois, à l'extrémité occidentale du département de l'Hérault, sur un des derniers contreforts méridionaux de la Montagne Noire. Ce site fortifié, qui apparaît dans les sources dès 813, est donc d’origine carolingienne, et même peut-être wisigothique. Il disparaît de la documentation vers la fin du XIVe siècle, ce qui en fait une probable victime, directe ou indirecte, de la guerre de Cent Ans. Ses vestiges, aujourd’hui très arasés, ont subi dans les années 1950 et 1980 quelques fouilles clandestines localisées qui ont permis d’exhumer un matériel archéologique important, heureusement récupéré en totalité, mais dissocié de tout contexte stratigraphique. Par ailleurs, des observations de terrain menées dans les années 1970 et 1980 par R. Marty ont permis de localiser dans les proches environs deux sites inédits du haut Moyen Âge, pourvus d’un abondant mobilier. Aussi, en l’absence de véritables fouilles archéologiques (1), sources, mobilier, éléments d’architecture et prospections se complètent pour nous offrir une première vision de ce castrum et de son terroir.
La maison templière de Richerenches (Vaucluse). Premiers résultats de l’étude archéologique et architecturale.
Authors: Mignon Jean-Marc , Carraz Damien
Published: August 2013

The Commandery of Richerenches (Vaucluse), founded in 1136 at the initiative of several local lords and with the support of the bishops of Saint-Paul-Trois-Châteaux and Vaison, was one of the first establishments of the Templars in Provence. Endowed with a parish status, the chapel, which was mentioned as early as 1138, and the convent buildings attracted a settlement which gave birth to today’s village. The restoration of the only remaining building of the Commandery was preceded by a study which allowed to distinguish two medieval stages in this building which was subsequently altered. Datable to 1138 at the earliest and having a modest aspect, the initial building included a vaulted ground floor confined to agricultural activities and a framed first floor used as living quarters. At the end of the XIIth or during the following century, the vaulting of the first floor entailed the placing of powerful buttresses between which big arches were disposed forming machicolation and supporting a wall and crenellation. The space was divided into two rooms, the smaller of which, in the East, had a chimney and blind arcades. The embellishment of the building reflects an enrichment of the community, but except for the use of good quality stones in medium courses, the building remained modest and severe.
How to Promote Learning in African Countries? Open d-learning System Based on an Open Content
Authors: Daoudi Najima , Amrous Naila , Ettaki Badia
Published: August 2013

The learning process has always been a privileged appeal for individuals to improve their knowledge and skills to enable them to become more productive and contribute to the sustainable development of society. However, poverty in most African countries generally, hampers the implementation of the learning process-face. These prove to be expensive when considering the cost of construction of facilities, teaching materials and also paying the teachers for tracking learners and contents production. To overcome the various constraints (personal, social and pedagogic) that impede the classical process of learning, we propose to use an open d-learning system.

It is a learning system that relies largely on contents 2.0 produced by researchers and experts and open content (open archives and open journal). Digital libraries can provide our system with a favorable environment in order to engage learners, motivate them and orientate them along their researches. Pedagogy and technology go together in this system to provide a quality learning environment. Indeed, management systems for the content of the company ECM provide an environment capable of managing the content despite their diversity and dispersal in several servers. The recommended pedagogy is the one which is active and constructive centered on the learner. An open d-learning plays an important role for the promotion of human development and thereby ensures the progress and changes in developing countries. The proposed system deals with an open generic and modular design to meet scalability of content and learning services always evolving. It allows access through several data -processing objects in the first level. The second one provides different learning services such as exercises, assessments, conducting practical work or projects. An intermediate level has been proposed to capitalize and gather the free content on the web identified as being useful for learning to enable their re-use and their sustainability. Finally, the fourth level which is in the form of an educational heritage consists of a free content but rich and varied. Such a system would be able to offer new opportunities for the countries in the process of development to guarantee human development and to become thus more competing at the era of globalization and the emergent technological development.
The Application Prospects Of Superconducting Materials In Household Products Design
Authors: Teng Shui Sheng , Pang Jian Jun , Liu Xiao Long
Published: August 2013

Superconducting materials are a new kind of high-end technology materials mainly used in the fields of cutting-edge technology and military. However, the superiority of its various aspects is becoming familiar and understood gradually which steps this new material into all areas of the society. In the spirit of "people-oriented" principle, the purpose of every progress in science and technology or in any other field of social development is to accomplish people's all-round development, therefore, new technologies and new materials can always be integrated quickly into our daily life, in which they are improved and developed continuously. Family life is the most important element of people's daily life; therefore, given their superior properties, the wide application of superconducting materials to design household products is an inevitable trend in the future.
Settling Characteristics of Alumina Nanoparticles in Ethanol-Water Mixtures
Authors: Ilyas Suhaib Umer , Pendyala Rajashekhar , Marneni Narahari
Published: August 2013

Nanofluids are considered as promising heat transfer fluids due to enhanced heat transfer ability as compared to the base fluid alone. Knowledge of settling characteristics of nanofluids has great importance towards stability of nanosuspensions. Sedimentation behavior of Alumina nanoparticles due to gravity has been investigated using different proportions of ethanol-water binary mixtures. Nanoparticles of 40 nm and 50 nm are used in this investigation at 23°C. Sediment height with respect to time is measured by visualization method in batch sedimentation. The effect of sonication on the sedimentation behavior is also studied using ultrasonic agitator. The effect of particle diameter, nanoparticle concentration and ethanol-water proportion on sedimentation behavior of nanofluids has been investigated and discussed.
Highly Efficient Degradation of Methylene Blue on Microwave Synthesized FeVO4 Nanoparticles Photocatalysts under Visible-Light Irradiation
Authors: Hu Si Jiang , Yang Juan , Liao Xue Hong
Published: August 2013

Ferric vanadate (FeVO4) nanoparticles as visible-light photocatalysts were successfully prepared by microwave irradiation method. The structure and morphology of FeVO4 nanoparticles were charactered by X-ray diffraction (XRD) and scanning electron microscope (SEM). Absorption ranges, which are responsible for the observed photocatalyst behavior, were investigated. Photocatalytic activities of the synthesized samples were examined by studying the degradation of the model dyes Methylene Blue (MB) under visible-light irradiation (400 nm). Various influence factors such as heat treatment temperature of FeVO4, and solution pH values as well as the amount of hydrogen peroxide and FeVO4 catalyst on the photocatalytic degradation of MB were discussed. Results clearly show the degradation ratio can reach 99% under the optimal reaction conditions in dye wastewater treatment in a short photocatalytic reaction time.
Biotic Attack in Claddings of Prefabricated Buildings
Authors: Kubečková Darja , Matějka Vlastimil , Kraus Michal , Černá Markéta , Kukutschová Jana , Žídek Libor
Published: August 2013

Problems biotic attack facades of prefabricated buildings takes particular with regard to given increasing demands and requirements of thermal technique and energy. In the last twenty years, increased demands on thermal properties of exterior walls, increasing the thickness of thermal insulation, additional insulation contact changes prefabricated walls on multilayer circuit design, but at the same time claddings prefab evident adverse side effects in the form of color change in outer surface rendering locally and globally. In this paper are discussed laboratory tests on the sample confirmed the presence of external plaster façade panel biotic attach building, which is equipped with additional contact system.
Influences of Vertical Slits on the Shear Behavior of Strain-Hardening Cement Composite (SHCC) Infill Walls Based on FEM Analysis
Authors: Kang Su Won , Gyun Lim Won , Yun Hyun Do
Published: August 2013

This paper provides the analytical mode and results of three strain hardening cement composite (SHCC) infill walls tested under laterally cyclic loading. The main variables of the experimental tests were vertical slit and slit length. The comparison between the experimental and analytical results showed that the shear strength was different depending on the slit length. A two-dimensional FEM analytical model was constructed in order to predict the behavior of the tested walls. The smeared crack model for SHCC elements was determined non-orthotropically crack model considered that it is able to represent fixed cracking. A good agreement was found between the test and the prediction in terms of lateral load-displacement relations and damage distribution.
The Effect of Sodium Chloride (NaCl) Coagulant Medium of Polysulfone Ultrafiltration Membrane
Authors: Shohur Muhamad Fikri , Harun Zawati , Yunos Muhamad Zaini , Hassan Sulaiman , Jamalludin Mohd Riduan
Published: August 2013

This study investigates the effect of Sodium Chloride (NaCl) coagulant medium with different concentration to produce Polysulfone (PSf) ultrafiltration (UF) asymmetric membrane. The polymer membrane prepared by a phase inversion method using Polysulfone (PSf) as a base polymer, Polyethylene glycol (PEG) 400MW as copolymer additive, N-methyl-2-pyrrolidone (NMP) as solvent and NaCl coagulant medium with different concentration as nonsolvent. In this work, the concentration of immersion medium for membrane phase immersion process prepared based on different coagulation concentration medium NaCl was modified repeatedly in the range of 1-5%. These membrane performance were analyzed via pure water permeation and solute rejection of humic acid. Based on these results, the membrane immersed in 4% concentration of NaCl coagulant medium showed the highest pure water permeation (235.69 l.m-2. h-1) and solute rejection of humic acid which is up to 98%.
Feasibility Study on Noncontact Monitoring of Temperature Distributions of Rotating Tool
Authors: Kosugi Akira , Matsuya Iwao , Ihara Ikuo
Published: August 2013

In the fields of materials science and engineering, measuring temperature has become one of the most fundamental and important issues. In particular, there are growing demands for monitoring temperature gradient and its transient variation of materials being processed at higher temperatures because the temperature state during processing crucially influences the quality of final products. Such temperature monitoring is also required for rotating machining processes such as tuning, milling and friction stir welding (FSW). In this work, a new noncontact method for monitoring temperature distribution of a heated rotating cylindrical object is presented. A laser-ultrasonic technique is employed in the method. Surface temperature measurements for the cylindrical object using the laser-ultrasonic technique and heat conduction analyses are combined together for making quantitative evaluation of temperature distribution in the radial direction of the cylindrical object. To demonstrate the feasibility of this method, an experiment with a steel cylinder of 100 mm in diameter rotating at 300 min-1 and heated up to 100 °C on the surface is carried out. A pulsed laser generator and a laser Doppler vibrometer are used for generating and detecting surface acoustic waves (SAWs) on the steel cylinder, respectively. Measured SAWs are used for determining both surface and internal temperatures of the cylinder. As a result, the estimated temperature distributions during heating almost agree with those measured by an infrared radiation camera.
Integrated Dexels Geometric Model and Predictive Force Model for Feedrate Optimization in 03 Axis Milling Machine
Authors: Abainia Sadredine , Bey Mohamed
Published: August 2013

Machining of sculptured surfaces engender abrupt variations in cutting forces, excessive tool deflections and undesirable vibrations and therefore poor surface finish. To reduce these problems and to have a stable machining it is more indispensable to select the appropriate cutting conditions. The aim of this paper is to propose an approach for determining the optimum feedrates along tool path during finishing of sculptured surfaces with ball end tools on 03-axis CNC milling machines using a predictive mechanistic model of cutting forces. Its steps are :1) approximation of the workpiece geometric model by dexels, 2) localization of the contact zones between tools and workpiece using machining simulation, 3) prediction of the cutting forces, 4) optimization of the feedrates and 5) updating of the machining program « G-Code ».
Parametric Study of Thermal Flow-Reversal Reactor for Ventilation Air Methane Oxidation
Authors: Deng Hao Xin , Wen Yu Xin , Xiao Qi , Xiao Yun Han
Published: August 2013

Experimental studies of ventilation air methane oxidation were carried out in a thermal flow-reversal reactor and a fixed bed reactor in laboratory scale respectively. The reaction characteristics of ventilation air methane in a fixed bed reactor were investigated. The influence of the feed gas velocity and the lean methane concentration on the temperature profile in the thermal flow-reversal reactor was studied. The internal temperature uniformity of the cross section and the cavity of the flow-reversal reactor which have influence on lean methane conversion have also been discussed and analyzed. The results shows that the oxidation of lean methane needs to meet the ignition temperature condition and the residence time condition, and the temperature distribution in the thermal flow-reversal reactor is mainly related to the methane concentration and the feed gas velocity while the methane conversion rate is mainly related to the temperature and the residence time in the high temperature zone of the reactor.
Effect of Beam Profile Size on Bus Superstructure Strength Having Rollover Crash
Authors: Bin Yusof Mustafa , Bin Afripin Mohammad Amirul Affiz
Published: August 2013

This paper deals with structural analysis of bus superstructure undergoes rollover event. Bus superstructure with varying beam profile size will undergo rollover simulations analysis. The purpose of this work is to analyze structural response of bus superstructure in terms of deformation, stress and strain under several loadings and constraining conditions. These rollover simulations were run according to United Nation Economic Commission of Europe Regulation 66 (UNECE R66). Validation procedure using simple box modeled undergoes rollover have been done to ensure the results are synchronized with real problem. An interaction with bus coach builder allows author acquired accurate bus superstructure dimensions before designing the mathematical model in finite element analysis software. Three full-scale bus superstructures mathematical model with difference cant-rail horizontal roof beam profile size was developed and the deformation of superstructure during and after rollover testing had been study. Analyses suggested that one of the contributing factors that lead to the failure of bus having rollover accident is cant-rail and roof structure profile size.
Performance Studies of Polysulfone-Based Membrane: Effect of Silica Morphology
Authors: Jamalludin Mohd Riduan , Harun Zawati , Basri Hatijah , Yunos Muhamad Zaini , Shohur Muhamad Fikri
Published: August 2013

In the present work, polysulfone (PSf) ultrafiltration membranes were prepared by solution casting. The effects of rice husk silica (RHS) on the surface properties of the PSf/Polyethylene glycol (PEG) membrane were observed and investigated. Characterizations were conducted to determine the membrane cross-section area and RHS distribution. The structure of RHS and morphology of membrane were analyzed by using X-ray diffractometer (XRD) and scanning electron microscope (SEM). XRD pattern showed that the amorphous silica was produced from rice husk ash (RHA). The analysis of SEM indicates that the addition of RHS obviously changed the microstructure of the membrane especially at top layer and sub layer.
Dielectric Properties of Rat Blood in Coagulation Process
Authors: Li Gun
Published: August 2013

Dielectric properties of rat blood is measured in frequency range of 10kHz-10MHz during its coagulation process, excluding the impaction factor of temperature via measuring at 37±2°C, the results reflect the changes of relative permittivity of rat blood after it leaves the body to half an hour. Experimental results show that dielectric properties of rat blood in the coagulation process show very different characteristics in different frequencies, mechanisms of our measurements are also analyzed theoretically. The findings should provide valuable information of biochemical reaction within blood during the process of coagulation, and also provide insight into assessment of electromagnetic field exposure for human body.
Optimization Design of Gear Train Based on Particle Swarm Optimization Algorithm
Authors: Wu Chang Wei , Wu Yong Hai , Ma Cong Bin , Wang Cheng
Published: August 2013

Particle swarm optimization algorithms have lots of advantages such as fast convergence speed, good quality of solution and robustness in multidimensional space function optimization and dynamic target optimization. It is suitable for structural optimization design. In this paper, manual transmission gear train of a tractor is taken as research object, the minimum quality and minimum center distance of the gear train is taken as optimization goal, the gear ratio, modulus, helix angle, tooth width and equilibrium conditions of the axial force are taken as the constraints, a multi-objective optimization model of the gear train is established. The optimal structure design programs and Pareto optimal solution are obtained by using particle swarm optimization algorithm.
An Improved Estimation of Distribution Algorithms Based on the Minimal Free Energy
Authors: Yu Fa Hong , Chen Mei Jia , Liao Wei Zhi
Published: August 2013

To systematically harmonize the conflict between selective pressure and population diversity in estimation of distribution algorithms, an improved estimation of distribution algorithms based on the minimal free energy (IEDA) is proposed in this paper. IEDA conforms to the principle of minimal free energy in simulating the competitive mechanism between energy and entropy in annealing process, in which population diversity is measured by similarity entropy and the minimum free energy is simulated with an efficient and effective competition by free energy component. Through solving some typical numerical optimization problems, satisfactory results were achieved, which showed that IEDA was a preferable algorithm to avoid the premature convergence effectively and reduce the cost in search to some extent.
Object Tracking Algorithm Based on Camshift Combining Background Subtraction with Three Frame Difference
Authors: Tang Quan , Dai Shu Guang , Yang Jie
Published: August 2013

Camshift tracking algorithm is based on probability distribution of color , it is susceptible to be interfered by the same color in the background, which will lead to the failure of the target tracking. To overcome this problem it presented an improved Camshift tracking algorithm. It combined background subtraction method with three frame difference method to detect target, got rectangular characteristic parameters of the motion target area as the Camshift initialization parameters, replaced the general Camshift algorithm which is based on color feature. Experimental results show that Camshift algorithm combining the background subtraction method with three frame difference method can meet the requirements of the real-time and stability to a certain extent.
Research on Vehicle Path Planning Based on the BDD in the Uncertain Environment
Authors: Peng Ya Li , Liu Jia Yao , Yin Hong
Published: August 2013

Aimed at the high dynamics and uncertainty of road traffic, we propose a method combine BDD (binary decision diagram)-Based heuristic algorithm which used to do the initial path planning with BDD-Based incremental to solve the route replanning problem. In order to get the optimal path set, BDD-Based heuristic Search is firstly used for global planning. BDD is a compact data structure, the BDD-Based heuristic Search use this characteristic to represent state space and compress the search space through heuristic information at the same time; when the road network information changes, incremental replanning was used in difference type of congestion and the optimum path set again. The simulation results show that the BDD-Based heuristic Search and incremental replanning method has high efficiency and practicability in solving vehicle routing problem under dynamic and uncertain environment.
Application of Improved Back Propagation Neural Network for the Recognition of Composite Insulator Hydrophobicity Grade
Authors: Yan Kang , Zhang Zhong Yuan
Published: August 2013

The detection of hydrophobicity is an important way to evaluate the performance of composite insulator, which is helpful to the safe operation of composite insulator. In this paper, the image processing technology and Back Propagation neural network is introduced to recognize the composite insulator hydrophobicity grade. First, hydrophobic image is preprocessed by histogram equalization and adaptive median filter, then the image was segmented by Ostu threshold method, and four features associated with hydrophobicity are extracted. Finally, the improved Back Propagation neural network is adopted to recognize composite insulator hydrophobicity grade. The experimental results show that the improved Back Propagation neural network can accurately recognize the composite insulator hydrophobicity
Simulation Realization of Adaptive Filtering Based on a Normalized LMS Algorithm
Authors: Li Ya Feng , Zheng Zi Wei
Published: August 2013

This paper presents the new algorithm which is an improved normalized variable step size LMS adaptive filtering algorithm. A normalized LMS algorithm with variable step size iterative formula is deduced and at the same time the simulation results prove that the new algorithm has good performance. The LMS adaptive filtering algorithm has been widely used in many applications such as system identification, noise cancellation and the adaptive notch filter ,the paper analyses the application and implement the simulation by matlab. the result shows the proposed algorithm has been applied well.
An Improved Discrete Particle Swarm Optimization for Berth Scheduling Problem
Authors: Huang Dan Hua , Wang Su
Published: August 2013

Berth scheduling operation is an important problem in container terminal. The mathematic model of this problem is described in this paper and an improved particle swarm optimization algorithm is introduced to obtain the optimal scheduling solution. A floating-point allocation rule is used to encode the particles in the discrete space. A local search method is combined with PSO to avoid precocity. Finally the experiments are done to prove the improved PSO in this paper can resolve the berth scheduling problem and get better solution and convergence speed than the basic PSO.
Design of Intelligent Alarm System Based on GSM Network
Authors: Xu Shun Qing
Published: August 2013

For the feature that the alarm system of home, industrial site security and anti-high temperature was limited by lines, we constructed an intelligent alarm system based on the GSM network to realize the wireless remote detection and control by sending and receiving messages via the GSM network technology. Practice has proved that the system has a wide application prospect with low misinformation rate, simple operation and higher cost-effectiveness.
Research of Embedded Image Processing Based on ARM11 and SQLite
Authors: Liu Chen Chen
Published: August 2013

According to the fact that the embedded system is not efficient enough to access and manipulate image data, this paper put forward a research program of image JPEG compression algorithm and being stored in a combination based on the ARM11 and SQLite embedded database image processing system. Comparative Researches on the system without data prove that the program can make the embedded systems more reasonable to store image data and realize the localized efficient management of the image data, which has certain practical value.
Steer Mechanism for Combustion Piston Type Hopping Robot with Adjustable Hop Angle
Authors: Samo Saifullah , Ma Shu Yuan , Sameh Bdran , Song Qian
Published: August 2013

A new design for settlement of take-off angle and steer mechanism for combustion piston type hopping robot is presented. The new hopping robot body is fabricated that can easily be loaded with new eras technology instruments to sense the environment and provide environmental information. The mechanisms are very simple which increase the mobility of hopping robot to overcome the challenges during traveling rough terrains. Hopping robot has an algorithm to get distance & obstacle height with help of sensors and settles the take-off angle to overcome desired distance and hop over obstacle efficiently and accurately. The designed structure provides protection to whole system, sensitive sensors and has the ability to absorb jerks & shocks which occurred during hopping and landing.
A Multiple Hardy-Littlewood-Polya Inequality
Authors: Sun Bao Ju
Published: August 2013

By introducing the norm and two parameters, we give a multiple Hardy-Littlewood-Polya inequality with a best possible constant factor.
Experimental Research on Temperature Rise of Bit in Drilling Normal and Low Temperature Lunar Soil Simulant
Authors: Cui Jin Sheng , Hou Xu Yan , Zhao De Ming , Hou You Song , Quan Qi Quan , Wu Xiang , Deng Zong Quan , Jiang Sheng Yuan , Tang De Wei , Yu You Long , Zhao Zeng , Yin Sen
Published: August 2013

The relation between temperature rise of bit and drilling parameters in drilling lunar soil simulant is studied in this paper through experimentation. Since it is difficult to measure the temperature of bit in the drilling process, fiber Bragg grating temperature measuring system is developed. Then, drilling experiments were carried out in normal and-30°C low temperature lunar soil simulant. This research showed a clear correlation between temperature rise of bit, rotational speed and torque in drilling process under specific lunar soil conditions. And the relations in drilling the two lunar soil simulants have similar patterns.
Research on High Volume Fraction SiCp/Al Removal Mechanism under Condition of Ultrasonic Vertical Vibration
Authors: Zhi Xin Tao , Xiang Dao Hui , Deng Jing Quan
Published: August 2013

High volume fraction SiCp/Al is a new kind of composite materials, with broad application prospect in the aerospace, automobile manufacturing and other fields, and gradually become the key materials in the field of high technology. But with its internal high hardness material (SiC) content increases and the material removal mechanism is not very clear, general machining is more difficult and seriously hinders the development of the material. With the advantages of high material removal rate, effectively processing all kinds of complicated curved surface, especially, in the thin-walled parts processing, milling occupies an absolute advantage. In order to solve the processing problems of high volume fraction SiCp/Al composites, basing on the theory of ultrasonic and brittle material removal. PCD milling experiment of SiCp/Al was carried out with homemade ultrasonic milling system under the condition of ultrasonic vertical vibration, the material removal mechanism was studied, the 2d and 3d model of surface formation was established, finally, microscopic structure on the surface of the workpiece was analyzed by metallographic microscope and electron microscope. Research results show that: SiC particle removal form can be divided into type of cut, pulled, pressed and crack penetration; under the condition of ultrasonic, probability of SiC particles cut type increased, this forms better surface smoothness; due to tool and chip separation characteristics and the ultrasonic impact effect on material, the removal mechanism of SiCp/Al is close to the plastic material, forming better surface quality under condition of ultrasonic. This paper verifies that the ultrasonic vertical vibration cutting is an effective machining method for high volume fraction SiCp/Al.
Study on Solar LED Lighting System
Authors: Jiang Yu Chuan , Tang Yi Si , Hu Gang Lin
Published: August 2013

The present study developed a high-efficiency charge/discharge controller for stand-alone solar LED lighting system by incorporating an nMPPO (near-maximum-power-point-operation) design, a PWM battery charge control, and a PWM battery discharge control to drive the LED. A battery charge control system using PWM technique with feedback control is developed in the present study to charge the battery in full capacity. The daily outdoor experiment shows the battery capacity can be charged 9.7% more after the overcharge point.
The Applications of Specific Forms in Modelling Design of Industrial Product
Authors: Yang Wei
Published: August 2013

If all the elements of modelling of industrial product are similar and one is different in form,it will stand out and become specific form. The internal structure, semantic function, use function and aesthetic function are the existing theoretic foundation. The applications of specific form in modeling design of industrial product include the application of specific forms of morphological attribute in modeling design，the application of specific forms of modeling techniques in modeling design, the application of specific forms of deformation in modeling design and the application of specific forms of image in modeling design.
The Research of Vehicle Emissions Control New Technology
Authors: Yan Tao Ping
Published: August 2013

Automobile exhaust governance is increasingly urgent with the increasingly development of economy and people's emphasis on environmental quality. This paper adopts the working principle of the low temperature plasma purification of automotive exhaust analysis to illustrate the method to remove the contaminants, and study the phenomenon of measured air going to a plasma generator located in the downstream of the combustor in plasma fuel converter. The high voltage is applied to airflow, forming high temperature plasma. High temperature plasma spray the air flow into the burner and high light-off combustible components of fuel air mixture to illustrate the method of purifying automobile exhaust. Last but not least, this paper studies the new technology how the high-tech road surface material effective purify automobile exhaust, and popularization and application. This paper can solve the negative impact of automobile exhaust on atmospheric in a large extent.
An Innovative Function Mechanism for the Learning Sequencing Specifications
Authors: Luo Jian Hua
Published: August 2013

The sequencing specification defines an interoperable method for representing the intended behavior of an authored learning experience such that any Learning Management System (LMS) will sequence discrete learning activities in a consistent way. At present, in the sequencing specifications, the intended Sequencing Strategies is encoded one by one in the XML file, causing the redundancy of sequence data. This paper presents an innovative function mechanism to design learning sequencing. This mechanism adds two categories, a function element and a function-call element, into the IMS Content Package Information Model. The function element is used to design a reusable sequencing component with an interface of parameters, while the function-call element is used to repeatedly call the function element by transferring various actual parameters. This method improves the design environment of the learning sequencing and effectively reduces the redundancy of the learning sequencing in a content package.
Parental Control of Diversified Groups: Samples of Chinese Manufacturing Enterprises
Authors: Xie Ming Lei , Chen Shun Zhou
Published: August 2013

Diversification can help enterprises to achieve synergies so as to enhance business performance. This article attempts to study this question from the viewpoint of parental control. The interaction effects among corporate diversification and the parental control tested through data obtained by questionnaires to 87 Corporations. The study foundt: companies with diversification strategy adopting official control over their subsidiary will reduce the overall corporate performance. However, the interactive effects between the degree of parental control and diversification are not significant.
Suggestions on International Language Environment Construction of Big Cities with New Information and Communication Technology
Authors: Wang Ya Fei , Wang Xin , Pei Xi Liang , Peng Jiu Sheng
Published: August 2013

The new generation of information and communication technology is booming, which creates a broad stage for mobile learning. The advantage of mobile learning is to meet the special needs of the citizens to learn a foreign language. At first, this paper analyzes the situation which the city international language environment construction is facing, then defines the connotation of a new generation of information communication technology, business and mobile learning, and points out that mobile learning is suitable for the city international language environment construction. It finally analyzes several mobile learning models which are based on the new generation of information communication technologies.
Stereo Vision Specific Observation Model for EKF-Based SLAM
Authors: Chen Yao Chang , Shih Ta Ming , Wang Chung Ho
Published: August 2013

This work addresses a new probabilistic observation model for a stereo simultaneous localization and mapping (SLAM) system within the standard Extended-Kalman filter (EKF) framework. The observation modal was derived by using the inverse depth parameterization as the landmark modal, and contributes to both bearing and range information into the EKF estimation. In this way the inherently non-linear problem cause by the projection equations is resolved and real depth uncertainty distribution of landmarks features can be accurately estimated. The system was demonstrated with real-world outdoor data. Analysis results show landmark feature depth estimation is more stable and the uncertainty noise converges faster than the traditional approach.
A Gabor Filter Based Image Acquisition Method for Raised Characters
Authors: Li Xue Yong , Lu Chang Hou
Published: August 2013

This paper presents a novel image acquisition technology for raised characters. First, laser stripes modulated with height information of raised character are captured using the 3D vision technique; then, laser stripes are combined into agrating image, in which are complete character images with grating background; Finally, a rational design Gabor kernel is applied to filter thegrating image. Through this way, the background was removed and the grayscale images of the raised characters are reserved. Experiments show that the proposed method can get the well-separated character images. Also, it is more simple and efficient than the existing methods.
Extraction of Structured Light Stripe in Outdoor Environment for Unmanned System
Authors: Tian Li , Zhu Wei , Di Fang , Li Jian Li , Li Ke Jie
Published: August 2013

Structured light extraction is an important problem in 3-D measurement of structured light. Due to traditional structured light extraction methods are mostly applied in small visual field and simple environment. Therefore, a novel method is proposed based on the feature of structured light aiming at the large field and complex surroundings. Firstly, a region of interest (ROI) is obtained through a third sensor in order to reduce calculations and process conveniently. And then, structured light is extracted according to its feature of brightness distribution module and geometrical morphology trait. Experiment shows that this new method not only extracts structured light in such large field with strong background noise well but also reduces the computation to meet real-time requirement.
Adaptive De-Noising Approach for Underwater Side Scan Sonar Image
Authors: Peng Lei
Published: August 2013

It is difficult to detect the edges of objects in side scan sonar images due to the complex background, bad contrast and deteriorate edges. Therefore, it is important to remove noise from side scan sonar images. The traditional de-noising methods for optical images may not work well on the sonar image. In this paper, an adaptive de-noising approach is used. The side scan sonar image is first filtered using mean filter to remove the rough noise, then a weighted function is generated using spatial distance filter and intensity distance filter. The parameters are adaptive according to the sonar image. The experimental results indicate that it is an effective de-noising method for underwater sonar image.
Ultrasound Image Intensity Nonuniformity Correction by Combining Intensity and Spatial Information
Authors: Song Wei Dong , Liang Gao Feng , Yang Xiao Li , Son Xiao Wei , Guo Jing Yu , Yang Ran , Hu Zhi Gang
Published: August 2013

Medical ultrasonic B-scans often suffer from intensity inhomogeneities that originates from the nonuniform attenuation properties of the sonic beam within the body. In order to correct signal attenuation in the tissue, time gain compensation (TGC) is routinely used in medical ultrasound scanners. However, TGC assumes a uniform attenuation coefficient for all body tissues. Since this assumption is evidently inaccurate, over-amplification or under-amplification sometimes appear. This is a major problem for intensity-based, automatic segmentation of video-intensity images because conventional threshold-based or intensity-statistic-based approaches do not work well in the presence of such image distortions. The main contribution of this paper is that additional spatial image features are incorporated to improve inhomogeneity correction and to make it more dynamic besides most commonly used intensity features, so that local intensity variations can be corrected more efficiently. The degraded image is corrected by the inverse of the image degradation model. The image degradation process is described by a linear model, consisting of a multiplicative and an additive component which are modeled by a combination of smoothly varying basis functions. Spatial information about intensity nonuniformity is obtained using cubic spline smoothing and entropy minimizing. Gray-level histogram information of the image corrupted by intensity inhomogeneity is exploited from a signal processing perspective. We explain how this model can be related to the ultrasonic physics of image formation to justify our approach. Experiments are presented on synthetic images and real US data to evaluate quantitatively the accuracy of the method.
Research on Improved Methods of Watershed Algorithm
Authors: Wang De Yong , Fan Ji
Published: August 2013

In this paper an improved image segmentation algorithm based on watershed transform is presented. Firstly the normalized cut method and watershed transform are explained and analyzed. Secondly the idea of the improved algorithm and the main formula are explained. We consider the area and perimeter when we merge adjacent regions. We define a new weight value and discuss the value of the parameter αand β. Finally the experiment result is presented. The new algorithm reduces the nodes and the computational demand of the common normalized cut technique.
Shockable Rhythms Detection Based on Nonlinear Dynamic Parameter
Authors: Yang Xiao Li , Li Zhen Wei , Hu Zhi Gang , Song Wei Dong
Published: August 2013

Ventricular Fibrillation (VF) and Ventricular Tachycardia (VT) are arrhythmia which seriously endangers the patient's life, as we know that electrical defibrillation is a most effective way that can rescue their lives. There are some similarities among signals of ventricular flutter (VFL), cardiac arrest, VF and VT; so erroneous judgments may occur by shock able (ShR) signal detection algorithm, which made the patients suffer unnecessary electric shocks. For this reason, a novel method which can distinguish VF and VT rapidly and accurately by ShR signal detection is urgently needed. Approximate entropy, which is a nonlinear dynamic parameters used for measuring sequence complexity and statistical quantification, has been attempted to distinguish various arrhythmias, and preferable results have achieved.
College Students’ Nervous, Excited, and Normal EEG Analysis
Authors: Zhang Xue Min , Xiong Zeng Gang , Mu Zhen Dong
Published: August 2013

In everyday life, people will inevitably cause tension, excitement and normal emotional state, emotional state, is very easy for any crowd collected EEG analysis, but the crowd, so nervous, excited state generated for different reasons, it is difficult to acquisition-related EEG characteristics were analyzed. College students are a special population, caused to them by the state of tension and excitement similar analysis, were college students before and after the final exam results announced before the announcement of the scholarship and the announcement of the scholarship, as well as state EEG acquisition and analysis to analyze EEG characteristics under tension, excitement and normal state of college students.
Covariance Intersection Fusion Smoothers for Multichannel ARMA Signal with Colored Measurement Noises
Authors: Qi Wen Juan , Zhang Peng , Deng Zi Li , Gao Yuan
Published: August 2013

For multichannel autoregressive moving average (ARMA) signal with colored measurement noises, based on classical Kalman filtering theory, a covariance intersection (CI) fusion smoother without cross-covariances is presented by the augmented state space model. It has the advantage that the computation of cross-covariances is avoid, so it can significantly reduce the computational burden, and it can solve the fusion problem for multi-sensor systems with unknown cross-covariances. Under the unbiased linear minimum variance (ULMV) criterion, three optimal weighted fusion smoothers with matrix weights, scalar weights and diagonal weights are also presented respectively. The accuracy comparison of the CI fuser with the other three weighted fusers is given. It is shown that its accuracy is higher than that of each local smoother, and is lower than or close to that of the optimal fuser weighted by matrices. So the presented fusion smoother is better in performance.
Research and Implementation of Integration Technology for XML-Based RFID Data
Authors: Peng Ying , Wang Fang
Published: August 2013

This paper proposes a new integration technology for RFID data by using XML£¬EPC tag and metadatabase. It solves the problem of data storage and sharing between the RFID systems and enterprise applications. And it can be used to achieve integration with other industries heterogeneous systems.