bluuebunny/crossref_metadata_2025 huggingface dataset:
96-Week Results of Abacavir/Lamivudine versus Tenofovir/Emtricitabine, plus Efavirenz, in Antiretroviral-Naive, HIV-1-Infected Adults: Assert Study
Authors: Moyle Graeme J , Stellbrink Hans-Jürgen , Compston Juliet , Orkin Chloe , Arribas José R , Domingo Pere , Granier Catherine , Pearce Helen , Sedani Sangeeta , Gartland Martin ,   the ASSERT Team
Published: July 2013

Background

Abacavir/lamivudine (ABC/3TC) and tenofovir disoproxil fumarate/emtricitabine (TDF/FTC) are widely used as first-line antiretroviral therapies. However, there are limited data comparing the safety of these therapies with long-term use. The objective of this study was to assess the long-term safety of these commonly used first-line nucleoside/nucleotide combinations each administered with efavirenz (EFV).

Methods

This open-label, 96-week, randomized study compared the safety (renal, bone and metabolic) and efficacy of ABC/3TC and TDF/FTC plus EFV in HLA-B*5701-negative antiretroviral-naive adults.

Results

A total of 385 subjects were enrolled, and 249 (65%) subjects completed the study. The difference in changes from baseline in estimated glomerular filtration rate (calculated by the Modified Diet in Renal Disease equation) between treatment arms was not significant. There was a significant difference between the arms ( P<0.0001) for markers of tubular dysfunction (retinol-binding protein and ß-2 microglobulin) favouring ABC/3TC. Hip bone mineral density decreased from baseline in both arms, with a significantly greater decline with TDF/FTC (ABC/3TC -2.2% and TDF/FTC -3.5%; P<0.001 at week 96). Subjects in the ABC/3TC arm had greater increases from baseline in median total cholesterol, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol and triglycerides. Adverse events were similar between arms. The virological failure rate was low in both arms.

Conclusions

ABC/3TC and TDF/FTC in combination with EFV minimally affected estimated glomerular filtration rate over 96 weeks. TDF/FTC was associated with greater increases in tubular dysfunction and bone turnover marker levels, greater decreases in hip bone mineral density, and smaller increases in serum lipid levels.
Milieux innovateurs et mise en ressources des nouvelles autoroutes
Authors: Hadjou Lamara , Duquenne Marie-Noëlle
Published: July 2013

L’objectif de notre article est de proposer une méthodologie de diagnostic des effets autoroutiers sur le développement local, reposant implicitement sur une approche territoriale, plaçant l’acteur au centre de la relation. Cette approche se veut plus prudente car elle est construite directement sur les stratégies et anticipations des acteurs locaux. Dans ce contexte, les effets d’une infrastructure autoroutière sont examinés à l’aide de trois variables centrales : d’une part, la perception des acteurs, d’autre part, leur capacité d’anticipation et enfin et surtout leur degré d’organisation et d’appropriation de l’ouvrage en tant qu’impulsion d’initiatives innovatrices. C’est de ce fait, une réelle approche de diagnostic territorial qui est proposée, reposant sur une analyse systématique de l’implication des acteurs, de leurs actions et des soutiens qu’ils reçoivent auprès des institutions.
Changements démographiques récents et perspectives futures au Mexique
Authors: Mier y Terán y Rocha Marta , García Guerrero Victor Manuel , Jezioro Etienne
Published: July 2013

La population mexicaine se trouve actuellement dans une étape avancée du processus de transition démographique. Elle se concentre dans les tranches d’âge de la population active, en conséquence de la réduction du poids de la population infantile ; le processus de vieillissement n’en est, quant à lui, qu’à ses débuts. Durant plus de trente ans, jusqu’en 2005, la mortalité et la fécondité ont suivi au Mexique une tendance à la baisse, tandis que l’émigration vers les Etats-Unis augmentait. La population croissait à un rythme de plus en plus faible. De 2005 à 2010, un changement inhabituel de ces tendances s’est produit. La mortalité a augmenté, une tendance en lien avec le nombre croissant d’homicides. La baisse de la fécondité s’est arrêtée, en particulier parmi les jeunes. L’émigration a diminué, et de nombreux migrants résidant aux Etats-Unis sont revenus au Mexique avec leur famille. Ces changements récents concernant la fécondité et la mortalité sont difficiles à inverser à court terme, tandis que la migration internationale dépendra en grande mesure de l’évolution de l’économie nord-américaine. Les scénarii futurs prévoient qu’il est fort probable que la population poursuive sa croissance et se concentre dans les âges d’activité au moins dans les 25 prochaines années.
Metabolic responses of acute phase protein, antioxidant and cytokine in Arabian Endurance horses
Authors: Adamu L. , Noraniza M.A. , Rasedee A. , Bashir A.
Published: July 2013

Changes in serum amyloid A (SAA), glutathione reductase (GR) and interleukin-6 (IL-6) could be responsible for the metabolic disorders and poor performance in Arabian horses during gruelling endurance events. Therefore, this study aims to evaluate the metabolic responses in relation to SAA, GR and IL-6 in Arabian horses during endurance events. After physical examination, the successfully completed (SC) (n=16) and eliminated-from-race (ER) (n=16) endurance horses were identified. The data obtained were analysed using ANOVA and pairwise correlations and the analysis were considered significant at P<0.05. There were significant differences between the SC and ER Arabian horses in haemoglobin (Hb), packed cell volume (PCV), creatine kinase, plasma protein, lactate and monocytes (P<0.0001), IL-6, GR (P<0.0007), SAA (P<0.0068), glucose (P<0.00342), aspartate transaminase (P<0.0049) concentrations. There were significant negative correlations between GR and plasma protein (r=-0.2830; P<0.0299) and GR and SAA (r=-0.2554; P<0.0489). There were significant positive correlations between IL-6 and Hb (r=0.2977; P<0.0220) and positive and not significant correlation between IL-6 and PCV (r=0.2449; P<0.0615). In conclusion, SAA, GR and IL-6 were significantly associated with metabolic crises in Arabian endurance horses. Therefore, SAA, GR and IL-6 could be used to evaluate performance and health status of endurance horses during training and endurance events.
Phrasal verbs: A contribution towards a more accurate definition
Authors: Busuttil Pierre
Published: July 2013

On décrit communément les « verbes composés » comme une combinaison idiomatique VERBE + PARTICULE ou VERBE + ADVERBE. Ces définitions me paraissent manquer de précision. L’emploi du mot « particule » est essentiellement un moyen élégant d’éviter d’avoir à décider si le second terme d’une telle combinaison est soit un adverbe soit une préposition. Je développe la théorie selon laquelle les véritables verbes composés sont du type VERBE + ADVERB. On pourrait les nommer verbes « adverbiés », à distinguer de leurs homologues prépositionnels. J’essaie de montrer que le second terme de telles combinaisons verbales fonctionne seulement comme un adverbe, qu’il s’agisse ou non à l’origine d’un adverbe.
Recent English financial terms in French-language, Dutch-language and German-language financial publications: borrowing versus translating
Authors: Phillips Diana
Published: July 2013

En matière de terminologie financière, la langue flamande emprunte à l’anglais bien davantage qu’elle ne traduit ; l’allemand fait de même à un moindre degré ; le français s’efforce, relativement, de traduire.
Application of Active Mount Engine Vibration Isolation to Fuzzy Control Systems
Authors: Guo Hui , Sun Guo Chun , Fan Min
Published: July 2013

An automobile power-train active mount system with a piezoelectric stack actuator is introduced. The influence caused by power-train to the body of the car is analyzed by means of parameter self-tuning fuzzy PID control, on which the simulating results are based. It turns out that this control scheme can restrain the influence better caused by power-train to the body of the car.
Application of 3D Laser Scanner on Dike Risk Analysis
Authors: Wang Rui , Yang Lei , Lou Xuan , Zhou Yang
Published: July 2013

A dike risk model experiment is introduced in this paper. Researchers use a 3D laser scanner to scan the dike model before and after a simulated flood event and calculate the volume of the erosional fossa. The scan work includes four scan stations located at different places surrounding the dike model. The four point clouds are merged together by ICP (singular value decomposition) and SVD (singular value decomposition) algorithm to create a complete, thorough and detailed virtual 3D model of the experiment dike. Researchers can do kinds survey and calculate work based on the 3D model instead of working on the real dike. The work efficient and data quality are increased significantly.
Technological Status and Development Trend on Remote Control of LED Intelligent Lighting
Authors: Zhang Jing , Qin Hui Bin , Zheng Liang , Yang Yi Qing , Zhou Lin
Published: July 2013

This paper introduces the technological status and development trends of LED intelligent lighting remote control system. Firstly, we put forward four requirements of LED lighting remote control technology. Then, two modes of LED lighting remote control system are discussedwired control and wireless control, which are generally used. We also discuss the advantages and disadvantages of these technologies such as the power line communication technology, RS-485 technology, ZigBee technology, GPRS technology. Finally, we introduce the two development trends of LED lighting remote control system in the future.
A Panoramic Video Monitoring System Using Low-Altitude UAV Based on Fish-Eye Lens
Authors: Xiong Zi Ming , Li Ke , Ding Yang , Wan Gang , Liao Jin Min
Published: July 2013

This paper uses the panoramic video data obtained by the UAV as data source, constructs low-altitude Panoramic Video Monitoring System based on eye-fish lens, and provides a new monitoring method which is real-time, dynamic, continuous, extensive and measurable by making a breakthrough in some key technologies, such as, distortion correction of eye-fish, geo-location based on panoramic video and projection transformation.
A Study on Reconstructing Temperature Field
Authors: Zhou Xian , Wu Wei Gen , Niu Gao Yuan , Wang Qiang
Published: July 2013

This paper puts forward a new algorithm based on RBF neural network to reconstruct three-dimensional temperature field.The algorithm uses three-dimension Discrete Cosine Transform on temperature field,and establishes a mapping relation between low order term coefficient vector and sound wave path average temperature vector,then implements the mapping relation using radical basis function neural network.Finally three-dimensional temperature field was reconstructed by using Inverse three-dimension Discrete Cosine Transform.Simulation results show that the algorithm features high precision.
Using Fuzzy Logic to Adjust Plasma Concentration Based on a Two-Compartment Pharmacokinetic Model
Authors: Zhao Lei , Shi Xin Ling , Zhang Yu Feng , Liu Ya Jie
Published: July 2013

In this paper, a closed-loop control system was developed using fuzzy logic to adapt the parameters of a pharmacokinetic (PK) model. The system is based on a two-compartment PK model with first-order rate process of oral administration. The fuzzy logic adaptation scheme uses the error and the change in error as the input variables. The output variable of the fuzzy controller is the scaling factor to adjust the PK parameter. The fuzzy controller adjusted the real situation concentration to the reference value derived from the parameters of population mean data according to the established rule-base. The simulation results show that the controller provides good performance to adjust the concentration with the reference values.
Secure Data Aggregation Research for Wireless Sensor Network
Authors: Liu Li Qiang , Wang Yue Bin , Yan Quan Feng
Published: July 2013

Wireless sensor networks are often deployed in open or even hostile environment, its security problem is very prominent, Data aggregation is easily to be attacked for security during the specific implementation process. In order to reduce the transmission of redundant data and enhance security, this article proposed a secure data aggregation and authentication scheme, .data was gathered according to the mode code, collection data was transmitted in encrypted form which will be selected nodes, ensured the confidentiality of the data; A session key was generated and delaied aggregation and authentication by using counter, ensured the integrity , authenticity and freshness of data during the transmission .The security analysis showed that the program had higher security which resisted the attack initiativly, node compromise attack and select forwarding attack and other malicious behaviors.
The Research of Smart Energy Management System
Authors: Feng Qing Dong
Published: July 2013

The article introduces the global research background and research achievements of the renewable energy resources micro grid dynamic energy management system (dynamic EMS).it will also describe the important effects of information technology used in smart grid. Furthermore, the building automation system are introduced and analyzed.
The Research of Novel High Voltage Electric Energy Measurement Apparatus Based on Three-Phase Four-Wire Virtual-Ground Theory
Authors: Zheng Zhi Shou , Wang Li Xin , Chen Xi Wu , Deng Wen Dong , Zhang Jia Hai , Qu Qing Chang
Published: July 2013

A novel apparatus is introduced in this paper used to measure high voltage electric energy based on three-phase four-wire virtual-ground theory. The virtual-ground design, Faraday shielding technique and Warner DC (Direct Current) self-supply method are integrated in this apparatus based on new I/V, V/V techniques to realize high accuracy, reliability and wide-linear range measuring. The effectiveness of the apparatus has been proved by in-house calibration and on-site test . The test result shows that it can be used in high voltage grid on-site calibration . Its measurement uncertainty can be limited to 0.1% under the condition of PF=1.0~0.8, and can reach 0.15% as PF=0.5. In summary, the apparatus discussed in this paper can be applied as high voltage electric energy measurement instrument to meet the requirement of online metrological verification and calibration. Furthermore, it is very useful for building the system of Advanced Metering Infrastructure (AMI) in smart grid.
Design of Switch Transformer about the Push-Pull Switch Power Supply
Authors: Wu Gang , Tang Yu
Published: July 2013

the push-pull switch power is a kind of form in the family. It has the characteristics of good voltage output, high efficiency, the simple circuit and so on. On the design of the push-pull switch power supply, the key and difficult point is the design of switch transformer. Taking the switch transformer of a push-pull switching power supply as the research object and based on the design requirements, this paper aims to realize the calculation of the coil turns in switching transformer. Meanwhile, under the consideration of the skin effect and the proximity effect and the choices of switch transformers wires and the methods of wires winding, the design of switch transformer of the push-pull switch power supply has been completed by circuit simulation and implementation.
The Research of On-Line Monitoring System for High Voltage Transmission Line Based on Wireless Sensor Network
Authors: Yan Hui , Hu Hai Yan
Published: July 2013

Taking advantage of advanced sensor technique, wireless network technology, multi-sensor information synthesize, general information progressing technology and computer technology, based on wireless sensor network, foundation platform hardware and the software architecture of the monitoring and warning system of high voltage transmission line are set up, which is used as the unified platform of high voltage transmission line monitoring for data collecting, data transmission, data display and warning, thus real-time online monitoring of high voltage transmission line is realized.
An Optimal Strategy of Balancing for LiFePO4 Battery in Battery Energy Storage System
Authors: Li Bo , Yang Dai Ming , Liu Jian Zheng , Chen Man , Lu Zhi Gang
Published: July 2013

Cell imbalance is one of the key factors that limit the capacity and power of battery energy storage systems (BESS), especially the large lithium-ion battery packs. To deal with the unbalancing problem, an effective balancing circuit is required, so is an optimal balancing strategy. In this paper, an optimal strategy for cells balancing has been presented. Contrary to the conventional balancing algorithms which base on instantaneous voltage or state-of-charge (SOC) no matter what the cause of imbalance is, the proposed strategy is targeted to different imbalance situations. Four cases of cell imbalance have been analyzed and the balancing effects of different algorithms are discussed. The simulation results show that the proposed strategy improves the performances of battery packs, including the usable capacity and maximum power.
The Application of Digital Simulation Technology in Ship Power System
Authors: Yuan Ren Min
Published: July 2013

This paper described the ship power system digital simulation technology is object-oriented simulation technology, it adopts the modular design and layered structure, among them, the modular design to enhance the simulation agility and scalability, and hierarchical structure is in reducing modeling workload at the same time greatly improve the simulation efficiency. Therefore, this technology in the ship power system digital simulation field has high practical value and broad application prospect.
Power Supply Reliability Evaluation Based on the Characteristics Mode of Large-Scale Medium Voltage Distribution Network
Authors: Cui Yan Yan , Zhao Da Pu , Liu Wei , Long Yu
Published: July 2013

It is difficult to evaluate and analyze power supply reliability of large-scale medium voltage distribution network by detailed modeling method. The paper proposes a power supply reliability evaluation method of large-scale medium voltage distribution network, which is based on the network reliability characteristics model. Lines with similar structural characteristics are designated as one model. The reliability index of each mode can be represented by the typical lines. The assessment principle, process and the advantages of this method are elaborated. The medium voltage distribution network of Nanjing area is taken as an example to evaluate power supply reliability. And the results are compared with historical statistics. The result shows that the method can greatly reduce the workload and has high accuracy. It can be used to evaluate the reliability of large-scale medium voltage distribution network.
A Power Quality Online Monitoring Device Based on PowerPC and DSP
Authors: Wang Qing Yu , Zhang Qing Qing , Zhang Gao Feng , Zhang Yi , Wu Lan Xu
Published: July 2013

According to the practical requirements of setting up large scale power quality monitoring systems and monitoring power quality in digital substations, an embedded power quality online monitoring device based on PowerPC and DSP is realized. The device structure, the overall hardware design, the PowerPC and the DSP systems are introduced. The design scheme based on PowerPC and DSP can take full advantages of the fast data calculation speed of DSP and the strong network processing ability of PowerPC. The test result of the measurement accuracy shows that the device can meet the power quality indicators measuring requirements of national standards.
Effects of Ultra-High Gravity Field on the Microstructure and Mechanical Properties of Solidified TiC-TiB2 Ceramic Prepared by Combustion Synthesis
Authors: Song Qi , Zhao Zhong Min , Zhang Long
Published: July 2013

Based on increasing the acceleration of high-gravity field from 500 g to 2500 g, a series of TiC-TiB2 composites are prepared by combustion synthesis in high-gravity field, and microstructure modification, microstructure homogeneity and mechanical properties of TiC-TiB2 composites are discussed in terms of liquid-liquid separation of TiC-TiB2 and Al2O3 in high gravity field. XRD, FESEM and EDS results showed that by increasing the acceleration of high gravity field, Al2O3 inclusions in the ceramic decreased both in volume fraction and size due to the enhanced separation of TiC-TiB2 liquid and Al2O3 liquid, while the enhanced Stokes flow induced by the enhanced liquid-liquid separation also promoted the constitutional homogeneity of TiC-TiB2 melt, thereby bringing about the refinement of the solidified microstructures, finally, making Vickers hardness and fracture toughness of the composites increase with the acceleration of high gravity field.
Application Research on Natural Frequency Method in Single Terminal Traveling Wave Fault Location
Authors: Gao Li , Shu Hong Chun
Published: July 2013

A method is provided to make natural frequency method be applied to single terminal traveling wave fault location in the paper. A group of fault distance suspected is calculated by single terminal method of traveling wave fault location method firstly, then deal with current travelling wave of fault by FFT to get the natural frequency reflecting fault location so that a fault distance can be calculated by it. Contrast the fault distance from natural frequency method and everyone of the group of fault distance suspected from single terminal method of traveling wave fault location method to determine the suspected fault distance closed to it is the calculation results we want. Numerical simulation shows the method can improve effectively the reliability of single terminal traveling wave fault location.
Comparison of Performance of a Diesel Engine Fueled with Soybean Biodiesel
Authors: Song Jian Tong , Zhang Chun Hua
Published: July 2013

Biodiesel as a renewable and environmentally friendly alternative fuel derived from natural fats or vegetable oils has better lubricating properties and much higher cetane ratings than today's lower sulfur diesel fuels. It is considered as an attractive alternative to replace diesel fuels. In order to investigate application of biodiesel on vehicle diesel engines, the power and fuel economies performances of a diesel fueled soybean biodiesel with different blending ratios were tested under different engine loads and speeds. Experimental results show that, compared with diesel fuel, with increase in the biodiesel in the blends, the brake power and torque, and the brake specific energy consumption increase but the fuel consumption per hour and brake specific fuel consumption decrease.
A New Intelligent Risk Automatic Warning System of Grid Catastrophic Accident
Authors: Wang Lian Hong , Zhao Yang , Li Hua Qiang
Published: July 2013

According to the theory of complex network and risk assessment, a intelligent risk automatic warning system of catastrophic accident based on conditional risk function is presented. The warning system introduces electrical betweenness and conditional risk expectations to overcome the insignificance of traditional risk assessment which only considered the status of grid and N-1 accident. A risk index system of catastrophic accident is constructed which reflects the risk of grid when it is current and in the next level of fault and portrays the trend of spreading to the catastrophic. The simulation results prove that this method which the new system use can identify the risks effectively. Consequently it provide effective reference information for security assessment of power system.
The Grinding Mechanism of Nanostructured Ceramic Coatings
Authors: Liu Wei Xiang
Published: July 2013

The paper used indentation fracture mechanics model or cutting model to deal with the grinding removal mechanism of nanostructured ceramic coatings, the interaction between the abrasive grains and the workpiece was approximately regarded as ideal small-scale indentation phenomenon, it was used to evaluate the surface quality in ceramic machined processing that formation of grinding crack and its propagation process, the material removed process and the surface defects of the ceramic grinding, the cutting model proved that although the removed material is usually brittle removal, most of the grinding energy consumption was related with plastic deformation.
Enhancement of Photocatalytic Oxidation Degradation of Methyl Orange by WO3/TiO2 Photocatalysts under UV Irradiation
Authors: Guan Hua Nan
Published: July 2013

Nanosized WO3-doped TiO2 photocatalysts were synthesized by a simple hydrothermal method, and characterized by scanning electron microscopy (SEM) and BET surface area analyzer. The photocatalytic activity of undoped TiO2 and WO3 doped TiO2 photocatalysts was evaluated by the photocatalytic oxidation degradation of methyl orange in aqueous solution. The results show that the photocatalytic activity of the WO3 doped TiO2 photocatalyst is much higher than that of undoped TiO2.
CR/EPDM Blends with Steel Friction and Wear Characteristics under Dry Sliding
Authors: Zhao Lian Hua , Xie Bao Ling , Fan Li Hua
Published: July 2013

CR is often used to make the foreskin material transport belts, wires, cables, and the manufacture of oil hose, gaskets, equipment and chemical resistant bushing. EPDM is often used to produce heat-resistant conveyor belts, cables, wires, anti-corrosion lining, gaskets, waterproof sheet, door and window seals, etc. The same hardness and different proportions of CR/EPDM blends with steel under dry friction pair as the research object to seek friction characteristics of different formulations of rubber with steel metal in the dynamic coordination. Friction test at a constant low load, constant temperature, the different mixing ratio of CR/EPDM blends, friction, wear, friction coefficient variation with engine speed. The test results to a reasonable choice of conveyor belts to improve the overall efficiency and life of rubber - metal friction pairs.
Development of Super-Hard Cutter Material
Authors: Feng Hui Ying , Li Xiao Jing
Published: July 2013

Super-hard tool material is a main research point of mechanical engineering because of excellent performance. The development of technology for high-speed cutting process could enhance the machining quality and surface precision. It is a difficulty thing to get higher finished surface for traditional machining process. However, the super-hard cutter material could enhance the finished performance of tool material. For example, the wearing resistance, high stability of PCD (polycrystalline diamond) and PCBN (poly cubic boron nitride) can get more information for obtaining higher finished surface quality. The author introduces super-hard cutters materials (PCD and PCBN) development, and discusses several material properties. The features of materials used in different cutting fields are discussed.
Analysis and Suggestions on Leakage of Boiler Low Temperature Reheater
Authors: Xu Xue Xia , Feng Yan Ting , Ke Hao , Niu Xiao Guang , Wang Qing
Published: July 2013

Leakage causes of boiler low temperature reheater were discussed by means of macroscopic inspection, chemical composition analysis, metallurgical microstructure examination, SEM and EDS fracture analysis. Results showed that the reheater leakage occurred for cracks originating from the fillet seam of ear plate. The main causes lie in improper structural design of the ear plate welding directly on the reheater elbow where suffered from complicated stress condition, wall thinning and out-of-round. In addition, as a weak zone, heat effect zone of the fillet welding seam was more likely to crack under fatigue stress for frequent unit start and stop and pipeline vibration. Installation stress existed between the ear plate and support block also contributed to the cracking. Suggestions were provided to avoid similar accident based on the comprehensive analysis of leakage causes.
The Research on the Design of the Vertical Axis Wind Turbine Street Light Pole
Authors: Bian Zhong Guo , Liu Shu Qin , Han Guo Zhi
Published: July 2013

According to the characteristics of the vertical axis wind turbine, research about the mechanical analysis and inherent frequency in design of the small vertical axis wind generator pole is complete, and simulation on the influence of the structure forms and pole wall thickness on natural frequency has been done. The results can help solve the problem such as resonance between the wind turbine pole and the rotating turbine.
Simulation and Test Study on Dynamic Characteristic of Air Spring with Auxiliary Chamber
Authors: Sun Li Qing , Li Zhong Xxing , Shen Xu Feng , Zhu Jia Yi
Published: July 2013

In order to improve dynamic characteristics of air spring with auxiliary chamber, finite element model of air spring R1A390-295 with auxiliary chamber connected with pipe is established,and through analysis to the dynamic characteristics of the model, influence discipline of sitffness characteristics to air spring with different pipe, different auxiliary chamber or different initial pressure are analysed under different excitation. The result show that:minor dynamic sitffness is obtained by using larger pipe or under lower excitation frequency,and as volume of auxiliary chamber increases, the spring dynamic sitffness will decrease accordingly and its amplitude tends to gentle,and influence for decreasing the spring dynamic sitffness is not obvious by continuing to increase the auxiliary chamber volume; the spring dynamic sitffness will increases as initial pressure increases. The validity of Finite element model is verified through dynamic characteristic test .
Vibration Parameters Optimization Experiment on Seeder of Rice Bud-Seed for Field Seedling Raising Based on Virtual Prototyping Technology
Authors: Yang Wang , Yang Jian , Ruan Hui , Liang Zhao Xin , Mo Jian Lin
Published: July 2013

The seeder of rice bud-seed for field seedling raising is a new seedling equipment for field seedling raising, which is a complicated vibration system with multi-freedom. And the effect of the vibration parameters and interactions on the vibration velocity at different locations of the moving rail of two electromagnetic vibration metering devices which are installed side by side is large, and the passing rate of seeding is affected. In this paper, the virtual prototype of seeder of rice bud-seed for field seedling raising is established by ANSYS and ADAMS. The virtual prototype is developed to carry out dynamics simulation by using four-factor quadratic regression orthogonal rotary combination design. Mathematical models of influencing factors of vibration and variation coefficient of vibration velocity, and the factors and average velocity of seeding are established. The factors are optimized. And optimal combination of vibration influencing factors and the variation coefficient of vibration velocity interval with 95% reliability are achieved. The result shows that optimal combination of factors is achieved under the condition that the excitation force amplitude is 39.8N, vibration frequency is 32.7Hz, the velocity is 58.5mm/s, stiffness of vibration isolating rubber pad is 1167N/mm. The corresponding variation coefficient of the vibration velocity is 6.287%, and the average seeding velocity is 18mm/s. The variation coefficient of the vibration velocity interval with 95% reliability is from 2.909% to 9.665%.
Research on Cutting Methods for Conical Spiral Blade
Authors: Zhang Jian Zhong , Zhao Lei , Fang Fang , Yang Fei
Published: July 2013

In this paper, the conical spiral blade cutting model is analyzed and deduced, and the conical spiral blade cutting formula and blanking method is studied. The blank is processed with Archimedes spiral cutting method,and the forming spiral can be completed only with several processing. The new blanking method makes complex production process more simplified, save a lot of material, and the design method is more suitable for actual production. In the actual machining process the desired results are achieved.
Structural Design and Mechanism Study of a New Extinguishing Bomb Used in High-Rise
Authors: Yang Li , He Wei Sheng , Zhao Qian Li , Jiao Zhi Gang
Published: July 2013

High-rise fires bring about severe losses to both peoples life and their property and consequently threat peoples life security. This paper focuses on a new extinguishing bomb used in high-rise, its structural rationalization and perfect diffusion effect were confirmed after calculation. Its rationalization that the bomb puts out a fire through window reliably was confirmed by using ANSYS/ LS-DANY to simulate the dynamic process that the extinguishing bomb penetrates window, which provides a reference for extinguishing bomb to conduct flight test, cut down test number and lower experimental cost.
Progress of Pulsed Jet Technology in Study and Application
Authors: Li Jun , Cao Yong Mei
Published: July 2013

Jet pump was widely used in the realm of water conservancy and aerospace. The trouble of lower efficiency on transfer restricted its rapid development and further application. A large number of experimental studies showed that its efficiency could be improved by pulsed jet, and pulsed jet generated in the device had higher impact on object. Based on massive literatures, generation ways of pulsed jet and study marches of excited pulsed jet were introduced briefly. At the same time, the progress in study and application of self-excited pulsed oscillation jet were focused on. Furthermore, in view of the domestic present situation of reservoir dredging, the next researches of jet dredging combination with artificial density-flow were prospected
Research on Multi-Cup Uniform Flow Gravity Sedimentation Single Well Injection-Production Technique
Authors: Zheng Guo Xing
Published: July 2013

When the oilfield enters the hing water cut stage, the mining faces the problem that the oil-gas gathering system energy consumption reduction needs to decrease produced water and water injection. This paper proposes a novel multi-cup uniform flow gravity sedimentation single well injection-production technique. The downhole oil-water separator separates oil from water. The separated water is directly reinjected into the injection layer. Higher oil content of oil-water mixture is lifted up to the ground. The water injection and oil production in the production wellbore are simultaneous. This paper also designs a crown-like sedimentation cup structure. The experiment shows that the optimum structure of crown oil-water separator is cylindrical with 30 inclination, 12 edges and one partition baord on the tip at the bottom of corrugated shape. Produced liquid contains water 95 percent; efficiency can be increased more than three times by using multi-cup uniform flow gravity sedimentation separator.
Design and Application of a Flamethrower Robot in Getting Rid of Foreign Matter on Power Transmission Lines
Authors: Zhao Guang Zhi , Wang Lu Dan , Ni Wei Liang , Hua Yu Liang , Weng Yue Ming
Published: July 2013

The purpose of this study is to design a flamethrower robot that works on power transmission lines. Composed of wheels and arms, the robot is able to move on the power transmission lines and also can get rid of the foreign matter like kites hanging on the line. Geometric design of the mechanism is discussed in detail and the critical problem of slide occurred between the line and the wheel is solved in this study. Also, the kinematics and the work space of the arm fixed on the robot are researched to ensure that the foreign matter hanging on the line can be cleared wherever it is. The effectiveness of the proposed concept is proved by experiments performed in a simulated line environment.
Home Services - Track Transport Robot Control System Design
Authors: Wang Rui , Guan Hao , Lan Jian
Published: July 2013

This paper combines the related developed technology and current functional requirements, show you a multifunction household services given trajectory transfer robot with low cost ,which is designed for the elderly and wreck. And the R&D of this robot has been finished according to the status of domestic and international development
Study of Fuzzy-PID Control in MATLAB for Two-Phase Hybrid Stepping Motor
Authors: Zhang Sheng Yi , Wang Xin Ming
Published: July 2013

two-phase hybrid stepping motor is widely used for driving part in industry controlling, the research for control algorithm applied in stepping motor becomes more and more important. The mathematic model of the two-phase hybrid stepping motor and the structure of Fuzzy-PID controller are detailed, and the simulation model of Fuzzy-PID controller in MATLAB/simulink is also founded. Finally, the simulation is done separately for a conventional PID controller and the Fuzzy-PID controller, and the result shows that the setting time and the maximum overshoot value is greatly reduced for the fuzzy-PID controller, and the performance of fuzzy-PID controller is better than conventional PID algorithm.
Fuzzy Control for Nonlinear Uncertain T-S Fuzzy Systems with Time-Varying Delays
Authors: Li Yi Min , Li Yuan Yuan
Published: July 2013

This paper studies the stability analysis of discrete time-varying system with parameter uncertainties and disturbances. The system under consideration is subject to time-varying non-bounded parameter uncertainties in both the state and measured output matrices. To facilitate the stability analysis, the T-S fuzzy model is employed to represent the discrete-time nonlinear system. A fuzzy observer is used to guarantee the Lyapunov stability of the closed-loop system and reduces the effect of the disturbance input on the controlled output to a prescribed level for all admissible uncertainties. The control and observer matrices can be obtained by directly solving a set of linear matrix inequality (LMI) via the existing LMI optimization techniques. Finally, an example is provided to demonstrate the effectiveness of the proposed approach.
Time Synchronization in Tandem Hot Strip Line Based on Improved Broadcast Mode
Authors: Cao Jian Zhao , Zhang Dian Hua
Published: July 2013

In order to solve the time synchronization problem in tandem hot strip line, the traditional algorithm of time synchronization was analyzed, and the server-client mode was compared with the broadcast mode using multithread technology, then the present paper improved the broadcast mode to improve its precision. The new method can estimate total delay including clock offset and network transmission time. A simple, easy and little loading time synchronization method was designed for the distributed process control system of tandem hot strip line. The new method was applied in domestic some tandem hot strip line successfully which showed that it could meet the demands of process control system with little expenses, simple structure and high precision.
The Synthesis and the Thermal Properties of CaZr4(PO4)6 Materials
Authors: Su Long , Sui Wan Mei , Liu Yu Jie
Published: July 2013

CaZr4(PO4)6 ceramics were prepared with solid reaction of two-steps method. CaZr4(PO4)6 powders were synthesized by solid-phase reaction with Ca (OH)2, ZrO2 and (NH4)2HPO4 as raw materials. Then the powders precursor were sintered to CaZr4(PO4)6 ceramics with single phase structure at 1400°C for 8 hours. The relative density was measured, the phase structure of the materials synthesized at different temperatures and the average coefficients of thermal expansion were investigated. The results showed that the relative density of CaZr4(PO4)6 ceramics sintered at 1400°C was 93%. The average thermal expansion coefficients was 1.8×10-6/°C from 25°C to 1400°C. The CaZr4(PO4)6 ceramics obtained possesses low thermal expansion property in a broad range of temperatures.
Research on Motion Simulation for Robot Based on WebGL
Authors: Demin Alexey , Zhang Tian Rui , Geng Hong Sheng , Li Xin , Wang Wan Shan
Published: July 2013

With a growing popularity of web applications, new technology can be adopted to create a 3D application for robotics simulation without plug-ins or third party components based on HTML5 and WebGL. By the use of 3D modeling software Remo3D, the three-dimensionally geometric model of robots links is built up. The standard COLLADA is used as a file format for storing the scene graph structure of robot model. The application uses open standards and can be run in any modern browser on PC or any smart device without installation.
Application of RFID Technology in Development Smart Home and Traffic System
Authors: Wang Ting Zhong , Zhi Ai Di
Published: July 2013

Smart Home is a versatile technology system family residential platform, the use of advanced computer technology and network technology, the families in a variety of electrical equipment connected together through some form of network. RFID can also be divided into active tags and passive tags. An active tag with RF energy initiative to give the reader sends data main obstacles applications; passive tags using modulated backscatter emission data. The paper puts forward the application of RFID technology in development Smart Home and Traffic System. The application of intelligent transportation systems in urban transport is by increasing the effective use and management of traffic information to improve the efficiency of the transportation system.
A Legible Method for Fluid Cavity Detection in Ultrasound Image
Authors: Guo De Quan , Yang Hong Yu , Zhang Zhi Jie , Liu Dong C.
Published: July 2013

We present a novel method to modulate influence of diffuse scattering in fluid cavity and reflection at boundary of pulse-echo ultrasound image. A simplified formation of ultrasound model is used to delineate it, and which is merged with modified dehaze model from principle of ultrasonic imaging, a legible fluid cavity in vascular or amniotic fluid of ultrasound image is obtained. Local and global characteristics of the image are utilized to adjust diffuse in different levels. Experimental results indicate that the proposed method is capable of producing ultrasound images that have better image quality and greater fidelity to the true tissue reflectivity.
Feed-Forward Control of Input-Series and Output-Parallel DC Transformer
Authors: Zhang Xian Jin , Wang Bu Gen
Published: July 2013

The input-series and output-parallel (ISOP) DC transformer, which has no output filter, runs under near 100% duty ratio, and is easily achieve zero voltage switching (ZVS) conditions and higher efficiency, is more and more attractive in the high input voltage and high power applications. In order to achieving input voltages sharing in ISOP DC transformer based on two non-resonant DC transformer modules, the feed-forward control method is proposed in this paper. And the principle of the proposed control is analyzed in detail. Finally, experimental results are given to verify the proposed control method to have a good ability of sharing the input voltages.
Preparation of Conducting PEDOT/PI Films by Depositing Polymerization of EDOT in Liquid Phase
Authors: Zhang Mei Juan , Li Jian Xiong
Published: July 2013

PI film was suspended in NaOH, FeCl3 and EDOT solutions sequentially. The surfaces of the films were analyzed with ATR-FTIR and the surface resistances were measured in four-probe mode. After immersed in NaOH solution amic acids were introduced to the film surface. The hydrolyzed film exhibited better adsorbing property and was able to adsorb FeCl3 in g/m2 magnitude. As the film with adsorbed FeCl3 was suspended in EDOT solution EDOT deposited on the surface and converted to conducting PEDOT. The resultant film exhibited surface resistance about 105 Ω and the characteristic absorption bonds of PEDOT on FTIR spectrum.
The Application of Tolerant Rough Set Neural Network to Fighter Fault Diagnosis
Authors: Sun Guo Qiang , Wang Hong Li , Tao Jun , Li Xu Bing
Published: July 2013

Conventional rough set theory is based on indiscernibility relation, which lacks the adaptive ability to data noise or data missing. Furthermore, it may present qualitatively whether or not the faults exist, but it cant compute accurately the value of the faults. Though the neural network has ability of approximating unknown nonlinear systems, but it cant distinguish the redundant knowledge from useful knowledge, so its classification ability cant catch up with the rough set classifier. This paper combines the rough set theory and the tolerant rough set neural network to diagnose the rudder faults of fighter, which solves well the problem of fault diagnosis and fault degree computation. Simulation results demonstrate the effectiveness of the proposed method.
Design on the System of Equipment Material Support Internet of Things
Authors: Zhang Dong Hu , Wang Tie Ning , Niu Xing Xing , Yu Shuang Shuang
Published: July 2013

The Internet of Things (IOT) plays an important role in improving the equipment support capability. Using the Internet of Things, cloud computing and other new advanced information technologies, the equipment material support system is constructed. In this paper, the architecture, the network structure and building steps of the equipment material support internet of things system are designed to promote the development of equipment material support.
Evolving Fault Tolerant System Based on FPGA
Authors: Lou Jia Nan , Li Yang
Published: July 2013

In order to overcome the single event function interrupt and SA failure, this paper proposes and implements a new way to design circuit, i.e. dynamically reconfigurable adaptive circuit design method. We load a Microblaze which is a soft CPU in FPGA as a motion control part of the circuit, as well as use some place of FPGA as evolution pool to find target circuit. Microblaze known input and the corresponding output applies genetic algorithm to search evolution pool. Depend on it, we successfully design and implement a DC Motor control system, besides, we carry out theoretical analysis on this circuit reliability and simulate circuit function repair test of SA fault, the result demonstrates that compared with the traditional circuit, this circuit and has a high reliability.
The Null Space Based Cooperative Formation Control for UAVs Swarm
Authors: Dong Shi You , Zhu Xiao Ping , Long Guo Qing
Published: July 2013

In this paper, the formation problem of UAVs swarm is studied based on a combination of the potential functions. On the basis of mathematical models of the traditional artificial potential field,a new formation potential function is proposed. The potential functions is merged using null space control strategy which is capable of dealing with conflicts among elementary potential functions and avoid local minimum problem. The results achieved by computer simulations suggest that the control approach can produces good effect.
The Research and Implementation about AFIS
Authors: Yuan Ren Min
Published: July 2013

Automatic identification technology becomes a urgent need of production and life, authentication technology gained worldwide attention because of its high reliability, fingerprint identification technology which applied to social security system can accurately determine protects a person's identity and prevent the phenomenon of the pension of falsely claim that solves this one long-term puzzling problem. Based on the preeminent fingerprint identification algorithm is improved, and combining with actual demand the improved algorithm, Using the fingerprint identification and IC card combination way realization of distributed fingerprint authentication system collection. Through the practical efficiency test analysis proves the whole system is feasible, and the running effect is good by practical application.
Design and Realization of Intelligent LED Fluorescent Lighting Control System
Authors: Zeng Ji
Published: July 2013

The intelligent LED daylight lamp lighting control system is designed. According to the external light intensity, the control system which uses the PWM light modulation technology, ST89C52 Single Chip Microcontroller as the control system core, can adjust brightness of the LED daylight lamp automatically and accurately, and can also manually adjust the brightness. A comfortable lighting environment can created through the system for controlling the illumination source, the purpose of energy saving can be achieved. The control system which can be used for a variety of lighting situations has strong application value.