bluuebunny/crossref_metadata_2025 huggingface dataset:
Review and assessment of the potential of post-IR IRSL dating methods to circumvent the problem of anomalous fading in feldspar luminescence
Authors: Li Bo , Jacobs Zenobia , Roberts Richard , Li Sheng-Hua
Published: May 2014

Quartz has been the main mineral used for optically stimulated luminescence (OSL) dating of sediments over the last decade. The quartz OSL signal, however, has been shown to saturate at relatively low doses of ∼200–400 Gy, making it difficult to be used for dating beyond about 200 thou-sand years (ka), unless the environmental dose rate is low. The infrared stimulated luminescence (IRSL) from feldspars has been shown to continue to grow to higher dose levels than quartz OSL. The application of IRSL dating of feldspars, however, has long been hampered by the anomalous fading effect. Recent progress in understanding anomalous fading of the infrared stimulated luminescence (IRSL) signals in potassium-feldspar has led to the development of post-IR IRSL (pIRIR) protocols and also a multiple elevated temperature (MET) stimulation (MET-pIRIR) protocol. These procedures have raised the prospect of isolating a non-fading IRSL component for dating Quaternary deposits containing feldspars. In this study, we review the recent progress made on (1) overcoming anomalous fading of feldspar, and (2) the development of pIRIR dating techniques for feldspar. The potential and problems associated with these methods are discussed.
Correction of inaccuracies to article of Stanisław Brożek, „Does Polish soil classification, V edition, refer to all soils in our country“ published in the Soil Science Annual, vol. 63 no. 3/2012: 49–56
Authors: Marcinek Jerzy , Komisarek Jolanta , Mocek Andrzej , Bednarek Renata , Skiba Stefan
Published: May 2014

Streszczenie

W pracy przedstawiono sprostowania nieścisłości, jakie znalazły się w artykule Stanisława Brożka pt. „Czy sys- tematyka gleb Polski, wydanie 5. dotyczy wszystkich gleb naszego kraju" opublikowanym w Rocznikach Gleboznawczych vol. 63, nr 3, 2012: 49-56. Praca ta jednak nie jest artykułem dyskusyjnym, lecz zbiorem uwag, najczęściej nieprofesjonalnych, na temat „Systematy ki gleb Polski” wyd. 5, 2011 (SgP5). Ponieważ w arty kule ty m znalazło się wiele błędów i nieścisłości wynikają- cych z niezrozumienia przez Autora istoty systematy ki gleb, a także tekstu ocenianej ..Systematyki...’', dlatego w niniejszym opraco- waniu nie podjęto szerszej dyskusji merytorycznej, jedynie przedstawiono sprostowania do błędnych wypowiedzi Autora, które dotyczą SgP5. Tym bardziej jest to konieczne, że Autor nie jest specjalistą z zakresu systematyki gleb, a Jego artykuł został opubli- kowany w gleboznawczym czasopiśmie naukowym.
Comparison of Atmospheric Travel Distances of Several PAHs Calculated by Two Fate and Transport Models (The Tool and ELPOS) with Experimental Values Derived from a Peat Bog Transect
Authors: Thuens Sabine , Blodau Christian , Wania Frank , Radke Michael
Published: May 2014

Multimedia fate and transport models are used to evaluate the long range transport potential (LRTP) of organic pollutants, often by calculating their characteristic travel distance (CTD). We calculated the CTD of several polycyclic aromatic hydrocarbons (PAHs) and metals using two models: the OECD POV& LRTP Screening Tool (The Tool), and ELPOS. The absolute CTDs of PAHs estimated with the two models agree reasonably well for predominantly particle-bound congeners, while discrepancies are observed for more volatile congeners. We test the performance of the models by comparing the relative ranking of CTDs with the one of experimentally determined travel distances (ETDs). ETDs were estimated from historical deposition rates of pollutants to peat bogs in Eastern Canada. CTDs and ETDs of PAHs indicate a low LRTP. To eliminate the high influence on specific model assumptions and to emphasize the difference between the travel distances of single PAHs, ETDs and CTDs were analyzed relative to the travel distances of particle-bound compounds. The ETDs determined for PAHs, Cu, and Zn ranged from 173 to 321 km with relative uncertainties between 26% and 46%. The ETDs of two metals were shorter than those of the PAHs. For particle-bound PAHs the relative ETDs and CTDs were similar, while they differed for Chrysene.
A Maximum Entropy Approach to Assess Debonding in Honeycomb aluminum Plates
Authors: Meruane Viviana , Fierro Valentina , Ortiz-Bernardin Alejandro
Published: May 2014

Honeycomb sandwich structures are used in a wide variety of applications. Nevertheless, due to manufacturing defects or impact loads, these structures can be subject to imperfect bonding or debonding between the skin and the honeycomb core. The presence of debonding reduces the bending stiffness of the composite panel, which causes detectable changes in its vibration characteristics. This article presents a new supervised learning algorithm to identify debonded regions in aluminum honeycomb panels. The algorithm uses a linear approximation method handled by a statistical inference model based on the maximum-entropy principle. The merits of this new approach are twofold: training is avoided and data is processed in a period of time that is comparable to the one of neural networks. The honeycomb panels are modeled with finite elements using a simplified three-layer shell model. The adhesive layer between the skin and core is modeled using linear springs, the rigidities of which are reduced in debonded sectors. The algorithm is validated using experimental data of an aluminum honeycomb panel under different damage scenarios.
Fermentation Technologies for the Optimization of Marine Microbial Exopolysaccharide Production
Authors: Finore Ilaria , Di Donato Paola , Mastascusa Vincenza , Nicolaus Barbara , Poli Annarita
Published: May 2014

In the last decades, research has focused on the capabilities of microbes to secrete exopolysaccharides (EPS), because these polymers differ from the commercial ones derived essentially from plants or algae in their numerous valuable qualities. These biopolymers have emerged as new polymeric materials with novel and unique physical characteristics that have found extensive applications. In marine microorganisms the produced EPS provide an instrument to survive in adverse conditions: They are found to envelope the cells by allowing the entrapment of nutrients or the adhesion to solid substrates. Even if the processes of synthesis and release of exopolysaccharides request high-energy investments for the bacterium, these biopolymers permit resistance under extreme environmental conditions. Marine bacteria like Bacillus, Halomonas, Planococcus, Enterobacter, Alteromonas, Pseudoalteromonas, Vibrio, Rhodococcus, Zoogloea but also Archaea as Haloferax and Thermococcus are here described as EPS producers underlining biopolymer hyperproduction, related fermentation strategies including the effects of the chemical composition of the media, the physical parameters of the growth conditions and the genetic and predicted experimental design tools.
DHA-Containing Oilseed: A Timely Solution for the Sustainability Issues Surrounding Fish Oil Sources of the Health-Benefitting Long-Chain Omega-3 Oils
Authors: Kitessa Soressa , Abeywardena Mahinda , Wijesundera Chakra , Nichols Peter
Published: May 2014

Benefits of long-chain (≥C20) omega-3 oils (LC omega-3 oils) for reduction of the risk of a range of disorders are well documented. The benefits result from eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA); optimal intake levels of these bioactive fatty acids for maintenance of normal health and prevention of diseases have been developed and adopted by national and international health agencies and science bodies. These developments have led to increased consumer demand for LC omega-3 oils and, coupled with increasing global population, will impact on future sustainable supply of fish. Seafood supply from aquaculture has risen over the past decades and it relies on harvest of wild catch fisheries also for its fish oil needs. Alternate sources of LC omega-3 oils are being pursued, including genetically modified soybean rich in shorter-chain stearidonic acid (SDA, 18:4ω3). However, neither oils from traditional oilseeds such as linseed, nor the SDA soybean oil have shown efficient conversion to DHA. A recent breakthrough has seen the demonstration of a land plant-based oil enriched in DHA, and with omega-6 PUFA levels close to that occurring in marine sources of EPA and DHA. We review alternative sources of DHA supply with emphasis on the need for land plant oils containing EPA and DHA.
Purification of Alaskan Walleye Pollock (Gadus chalcogrammus) and New Zealand Hoki (Macruronus novaezelandiae) Liver Oil Using Short Path Distillation
Authors: Oliveira Alex , Miller Matthew
Published: May 2014

The beneficial health effects of a diet rich in n-3 long chain polyunsaturated fatty acids (n-3 LC-PUFA) have been extensively researched in recent years. Marine oils are an important dietary source of n-3 LC-PUFA, being especially rich in two of the most important fatty acids of this class, EPA (eicosapentaenoic acid; 20:5n-3) and DHA (docosahexaenoic acid; 22:6n-3). Oils rich in n-3 LC-PUFA are prone to oxidation that leads to loss of product quality. Alaskan pollock (Gadus chalcogrammus Pallas, 1814) and New Zealand’s hoki (Macruronus novaezelandiae Hector, 1871) are the highest volume fisheries of their respective countries. Both produce large quantities of fishery byproducts, in particular crude or unrefined n-3 LC-PUFA containing oils. Presently these oils are used as ingredients for animal feed, and only limited quantities are used as human nutritional products. The aim of this research was to investigate the applicability of short path distillation for the purification of pollock and hoki oil to produce purified human-grade fish oil to meet quality specifications. Pollock and hoki oils were subjected to short path distillation and a significant decrease in free fatty acids and lipid oxidation (peroxide and para-anisidine values) products was observed. Purified oils met the Global Organization for EPA and DHA Omega-3 (GOED) standard for edible fish oils.
Multi-Polarization ASAR Backscattering from Herbaceous Wetlands in Poyang Lake Region, China
Authors: Sang Huiyong , Zhang Jixian , Lin Hui , Zhai Liang
Published: May 2014

Wetlands are one of the most important ecosystems on Earth. There is an urgent need to quantify the biophysical parameters (e.g., plant height, aboveground biomass) and map total remaining areas of wetlands in order to evaluate the ecological status of wetlands. In this study, Environmental Satellite/Advanced Synthetic Aperture Radar (ENVISAT/ASAR) dual-polarization C-band data acquired in 2005 is tested to investigate radar backscattering mechanisms with the variation of hydrological conditions during the growing cycle of two types of herbaceous wetland species, which colonize lake borders with different elevation in Poyang Lake region, China. Phragmites communis (L.) Trin. is semi-aquatic emergent vegetation with vertical stem and blade-like leaves, and the emergent Carex spp. has rhizome and long leaves. In this study, the potential of ASAR data in HH-, HV-, and VV-polarization in mapping different wetland types is examined, by observing their dynamic variations throughout the whole flooding cycle. The sensitivity of ASAR backscattering coefficients to vegetation parameters of plant height, fresh and dry biomass, and vegetation water content is also analyzed for Phragmites communis (L.) Trin. and Carex spp. The research for Phragmites communis (L.) Trin. shows that HH polarization is more sensitive to plant height and dry biomass than HV polarization. ASAR backscattering coefficients are relatively less sensitive to fresh biomass, especially in HV polarization. However, both are highly dependent on canopy water content. In contrast, the dependence of HH- and HV- backscattering from Carex community on vegetation parameters is poor, and the radar backscattering mechanism is controlled by ground water level.
RESTful Discovery and Eventing for Service Provisioning in Assisted Living Environments
Authors: Parra Jorge , Hossain M. , Uribarren Aitor , Jacob Eduardo
Published: May 2014

Service provisioning in assisted living environments faces distinct challenges due to the heterogeneity of networks, access technology, and sensing/actuation devices in such an environment. Existing solutions, such as SOAP-based web services, can interconnect heterogeneous devices and services, and can be published, discovered and invoked dynamically. However, it is considered heavier than what is required in the smart environment-like context and hence suffers from performance degradation. Alternatively, REpresentational State Transfer (REST) has gained much attention from the community and is considered as a lighter and cleaner technology compared to the SOAP-based web services. Since it is simple to publish and use a RESTful web service, more and more service providers are moving toward REST-based solutions, which promote a resource-centric conceptualization as opposed to a service-centric conceptualization. Despite such benefits of REST, the dynamic discovery and eventing of RESTful services are yet considered a major hurdle to utilization of the full potential of REST-based approaches. In this paper, we address this issue, by providing a RESTful discovery and eventing specification and demonstrate it in an assisted living healthcare scenario. We envisage that through this approach, the service provisioning in ambient assisted living or other smart environment settings will be more efficient, timely, and less resource-intensive.
MLAOS: A Multi-Point Linear Array of Optical Sensors for Coniferous Foliage Clumping Index Measurement
Authors: Qu Yonghua , Fu Lizhe , Han Wenchao , Zhu Yeqing , Wang Jindi
Published: May 2014

The canopy foliage clumping effect is primarily caused by the non-random distribution of canopy foliage. Currently, measurements of clumping index (CI) by handheld instruments is typically time- and labor-intensive. We propose a low-cost and low-power automatic measurement system called Multi-point Linear Array of Optical Sensors (MLAOS), which consists of three above-canopy and nine below-canopy optical sensors that capture plant transmittance at different times of the day. Data communication between the MLAOS node is facilitated by using a ZigBee network, and the data are transmitted from the field MLAOS to a remote data server using the Internet. The choice of the electronic element and design of the MLAOS software is aimed at reducing costs and power consumption. A power consumption test showed that, when a 4000 mAH Li-ion battery is used, a maximum of 8–10 months of work can be achieved. A field experiment on a coniferous forest revealed that the CI of MLAOS may reveal a clumping effect that occurs within the canopy. In further work, measurement of the multi-scale clumping effect can be achieved by utilizing a greater number of MLAOS devices to capture the heterogeneity of the plant canopy.
A Pediatrician's View
Authors: Hoekelman Robert A
Published: May 2014

Pyloric Stenosis Is a Pediatrician's Diagnosis
Analysis of Dissipative Particle Dynamics Fluid in Sheared Regimes
Authors: Moshfegh Abouzar , Jabbarzadeh Ahmad , Tanner Roger I.
Published: May 2014

The present Dissipative Particles Dynamics (DPD) simulation study aims at extracting some correlations between velocity and temperature profiles, and dynamic viscosity with externally applied shear velocity via Lees-Edwards boundary condition. System physical and rheological behaviours are studied under changes made to shear velocity, cutoff radii and weight function exponent in the definition of conservative, dissipative and random forces. Two cutoff radii are altered up to the level where system of particles shows anomalous behaviour. Radial distribution function and temperature (T) are invoked to rule out invalid cutoff radii combinations. Calculated viscosity in a range of weight functions exponents (S) is compared against theory in a variety of shear velocities, where reasonable agreement with respect to T control is achieved.
Comparison and Development of Equation of State Laws in Smoothed Particle Hydrodynamics
Authors: Peacock Patrick , Holmes David W.
Published: May 2014

In this paper we present a brief comparison of existing equation of state laws used inSmoothed Particle Hydrodynamics (SPH) and introduce some new expressions for the equation ofstate for pressure, as well as to calculate temperature. In SPH literature practical examples of heatconduction and energy are scarce when compared with fluid flow formulations that determine pressuresimply from density and an artificial speed of sound. Such simplifications may be appropriate forisothermal flow problems; however, a more thermodynamically rigorous formulation is necessary forcomplex and thermally driven problems, particularly in geophysics. This work discusses conventionalequations of state, as well as presenting some new relations. This includes having pressure depend onthe energy of the system, and applying these relations to a number of proof of concept examplesdemonstrating natural convection and examining the parameters of the new equation of state. Thesedevelopments facilitate future work towards modelling more complex physical phenomena such asheat driven convective flow.
Discretization Errors of Random Fields in Finite Element Analysis
Authors: Huang J. , Griffiths D.V. , Lyamin Andrei V. , Krabbenhoft Kristian , Sloan Scott William
Published: May 2014

The mechanical properties of natural materials such as rocks and soils vary spatially. This randomness is usually modelled by random field theory so that the material properties can be specified at each point in space. When these point-wise material properties are mapped onto a finite element mesh, discretization errors are inevitable. In this study, the discretization errors are studied and suggestions for element sizes in relation with spatial correlation lengths are given.
Effect of Bearing Dynamic Properties on the Lateral Vibration of a Flexible Rotor
Authors: Wu Helen
Published: May 2014

Analytic study of rotor vibration plays an important role in design, and fault detection and diagnosis of rotating machines. In this paper, vibration characteristics of a flexible rotor due to a central mass unbalance were analysed numerically under two cases. In Case I, bearings have symmetric, isotropic stiffness and damping matrices, while in Case II they have asymmetric, non-isotropic stiffness and damping matrices. It was found in Case I that critical speed occurs at 1690 rpm and the orbital trajectories of rotor mass stations are circular and corotational. In Case II, response orbit of either the bearing or the disk is elliptic and the size, shape, and orientation of the elliptical orbit changes with shaft speed, and also from the bearing to the disk.
Finite Element Static Analysis of YP2080 Automatic Hydraulic Press
Authors: Lv Dong Qing
Published: May 2014

The paper took 2080 tons automatic hydraulic tile press as the research object, completed the finite element static analysis of its beam and base. Established their three-dimensional models with CAD software Pro/ENGINEER, and then analyzed the stress and transfiguration with CAE software ANSYS. Studied the distribution of the stress and strain, and found their maximum and location. The result can provide some good reference for design and optimization.
Static Analysis and Modal Analysis of Heavy-Load Manipulator Based on ANSYS
Authors: Li Zhang , Zang Xi Zhe , Suo Lai Chun , Zhu Yan He , Zhao Jie
Published: May 2014

The heavy-load manipulator arm, an important part of the remote handling maintenance system of the large-scale multi-purpose deployer, plays a key role of the entire system. Its modeling and assembly was finished by Pro/E. Then use the ANSYS Workbench, finite element analysis software, to complete its static analysis and modal analysis through building a seamless connection between Pro/E and ANSYS Workbench. As a result, the overall deformation and static stiffness values of the manipulator arm were obtained through static analysis, and the former six-order natural frequency values and mode shapes were obtained through modal analysis. Finally, scheme of structure modification and new control method were presented by analyzing and comparing the results.
Design of the Circular Cutting Device
Authors: Wei Chao Kun , Tang Shan Shan , Yang Hao
Published: May 2014

Currently, abrasive water jet technology is widely applied to cutting while it has been difficult in circular cutting, as travel mechanism is not easy to realize or the structure is too complex. To solve this problem, this paper presents a simple circular cutting device for high-pressure water jet technology. The cutting device completes cutting work by rotating clamping devices around the center thimble through electromotor. At the same time,the paper introduces the components of the circular cutting device and analyzes the reliability of the slider part by ANSYS.
Design of Data Acquisition System in Friction Wear Testing Machine Based on Virtual Instrument LabVIEW
Authors: Wang Li Xin , Zhai Li Gang , Gao Ya Yan
Published: May 2014

Friction wear testing machine is generally used in researches of various friction wear mechanisms, explorations of influences factors, and property evaluations of friction pair materials. Measurement accuracy and automation level of the friction wear testing machine directly influence the precision of data acquisition and analysis processing, as well as the intuition of data displaying. Based on virtual instrument LabVIEW, a data acquisition system of friction wear testing machine was developed. Hardware of this data acquisition system mainly consists of sensors utilized as acquiring information on rotate speed, normal pressure, friction force and temperature, as well as signal conditioning module and data acquisition card. Utilizing the LabVIEW, data processing and interface displaying software was programmed. Debugging results confirmed that the developed system can accurately acquire the demand information when operating the friction wear testing machine, also intuitively display these obtained information in real-time. Therefore, the developed data acquisition system satisfies the demand of precisely acquiring information related to friction wear testing of experimental materials.
The Research and Simulation Analysis of a New Type of Translational Transmission Device
Authors: Zhang Zhi Qiang
Published: May 2014

In this paper, the following work is done: a new type of translational transmission device is designed; explained in detail are the operating principle, structural features, relationship of mechanism parameter and non interference conditions of the movement; the optimization analysis of transmission device is implemented on the basis of non interference conditions of the bucket movement; structural modeling and simulation analysis are carried out by utilization of Pro/e & Recurdyn; and based on virtual prototype technology, the new type of translational transmission device is verified by experiments, the data of which prove the translational transmission device reasonable and practicable. In conclusion, this paper has laid the theoretical foundation of the practical application of the translational transmission device.
The Achievement of Intelligent Lubrication Adjustment Function of CNC Machine Tools Based on SSAS
Authors: You Dong Sheng
Published: May 2014

The use of CNC machine tools signal acquisition, two-way transmission of the temperature sensor data, the ladder design and macro program guide and other methods on the implementation of a temperature sensing system of smart lubrication function. It is not only low-end CNC machine tools can compensate for deficiencies in equipment protection features and maintenance-free function, but also enhance the diversity of processing. Ultimately by analyzing the different lubrication mode, the relationship between the lubricating oil pressure and temperature and other factors, to draw the function in the lubrication in a stabilizing effect on oil pressure and control bearings and nut seat temperature. It is simple and practical, has important theoretical significance and great value.
Analysis of Inverter Based on SCR and PWM Comparation
Authors: Zhou Jia , Tan Xiao Long , Wang Wen Bin
Published: May 2014

Inverter technology as the key part of using new energy technology, can be very effective to new energy sources such as solar, battery and fuel cell energy conversion of ac electrical energy transform into ac power, and can be connected to the grid. Therefore, the inverter technology has an extremely important statue in modern society.
Selecting Optimal Reactive Compensation Device for Power System
Authors: Ngoat Tran Thi , Zha Xiao Ming , Giang Le Ngoc
Published: May 2014

Although there are many studies on application of FACTS unit, especially application of reactive power generating unit for power system to enhance voltage stability amplitude and transient stability as considered, the evaluation and selection of suitable power generating unit (STATCOM or SVC) as well as optimal compensation size in the analysis of steady and transient state is not paid attention to. This article studies the above described issues to give a solution to install reasonable reactive power generating source (kind of Var source, location, size) for the power system. The analysis will be based on the technical factors rather than economic ones. 500kV grid system in Vietnam will be used in the calculation until 2015. To deeply evaluate, the implementation plan of reactive power compensation was only studied for 500kV grid in the South, where the load demand is large and can be dramatically increased. The results of power flow calculation, the analysis of characteristics of PV, OPF, and transient stability were studied through PSS/E-30 software.
A Design of CPPLL for CMMB Broadcasting System
Authors: Wang Xiao , Zeng Zhi Bin
Published: May 2014

As an important module in CMMB system, the performance of phase locked loop will directly determines the accuracy, purity and synchronization of system clock. In this paper, a high performance CPPLL circuit is designed to make each system clock of base station to get strict synchronization in frequency and phase. Test results show that the performance of this design meets the CMMB system requirements
Power Control of a Photovoltaic Generation System Using Rough Fuzzy-PID Techniques
Authors: An Ai Min , Chen Li Wen , Zhang Hao Cheng
Published: May 2014

The photovoltaic power generation system needed to be work at the maximum power point (MPP) to get the maximum efficiency. As the MPP can be influenced by environment condition, such as temperature and irradiation, it is necessary to optimize and control the PV system operation process. In this paper, a rough Fuzzy-PID control strategy is proposed to adjusting the PV operation to make the system working efficiency. Rough Fuzzy-PID control strategy is best in dealing with time-varying and non-linear system, it is much suitable for solving the MPPT of photovoltaic system through switching pulse generation to DC/DC buck converter. These control systems are modeled and simulated in Matlab/Simulink environment.
Using Hybrid Type SFCL to Limit the Surge Current Caused by Closing Loop Operation in Distribution System
Authors: Li Zhe , Chen Lei , Yang Wei , Deng Chang Hong , Liu Hui
Published: May 2014

Owing to the scale of power distribution system’s continuously expanding, the closing loop operation is usually needed to meet the demand for the reliability of power supply. However, during the course of this operation, a larger AC surge current with 4~5 times of normal value will be induced, and the surge current can cause the equipped over-current protection take action incorrectly. In this paper, a hybrid type superconducting fault current limiter (SFCL) is suggested to installing into the distribution system, which will take action to inhibit the closing-loop transient surge current by using current-limiting impedance during the transient process. Furthermore, the simulation model of a typical distribution network with the hybrid type SFCL is built through PSCAD/EMTDC software. From the simulation results, it is verified that the suggested hybrid type SFCL can obviously reduce the surge current and improve the power system’s operational stability.
Research on Statistics & Analysis Evaluation Method of Electric Power Communication Equipment
Authors: Wang Shi Wen , Li Xiong , Wang Chun Ying , Shu Xin Jian
Published: May 2014

Aided equipment statistics & analysis platform can solve several problems for electric power communication equipment statistics, such as, large amount of statistics, long cycle of analysis, low degree of automation and low level of intelligent evaluation. The statistics & analysis model of communication equipment with the features of advanced, safe and efficient, allows for rapid response to dynamic altering of the network traffic and the equipment operation state, as well as the comprehensive analysis of evaluation index. So the operational status of communication equipment and the health status of communication network can be reflected scientifically. Scientific analysis and effective assessment on forecasting and diagnosing the network will help make an intelligent analysis on the weak link of communication network, which can also obtain reasonable optimization of network system structure, eliminate the hidden danger and provide a guidance for the planning and readjustment on next year’s operation mode. It also seeks to establish an analysis & design system for electric power communication equipment, which can solve the problem of equipment analysis and design. And the system would meet the growing demand of power communication operation in Smart Grid.
Simulation Analysis of Excess Noise Factors for Photomultiplier Tube
Authors: Wang Shen , Zeng Zhao Yang , Zhang Fei
Published: May 2014

Noise is one of the most significant indicators to measure the performance of the PMT, which is regarded as a photoelectric detector. Moreover, the excess noise factor F is an important parameter to describe the noise. Excess noise factor expressions for PMT in different situations are derived and analyzed by simulation in this paper. Some numerical simulations are made to obtain the maximum and minimum excess noise factor F and the changing trend of F with each parameter. From the analysis, we can minimize the noise for PMT to increase the detection precision as a photoelectric detector.
Research on AC Electronic Load
Authors: Yan Xue Fei , Zhu Chang Qing , Zhao Yue Fei , An Qiao Jing
Published: May 2014

The AC electronic load circuit is studied, PWM converter is used in this circuit in order to achieve the simulation function of load characteristics.The methods of how to get the command current mathematical model and simulation module is given which is based of the Matlab/Simulink platform, Hysteresis control mode is used in order to get fast and stable actual current and then carried on the simulation of the proposed electronic load. The simulation results show that the proposed algorithm and the control instruction current method and the effectiveness of the current control method, realized the simulation of ac electronic load.
A Capacitive Humidity Sensor for Low-Cost Low-Power Application
Authors: Wu Xiang , Deng Fang Ming
Published: May 2014

This paper presents a capacitive humidity sensor in CMOS technology. The humidity sensor element is implemented in standard CMOS technology without any further post-processing, which results in low fabrication cost. The sensor interface employs a fully-digital architecture based on phase locked loop, which results in low pow dissipation. The proposed humidity sensor is fabricated in TSMC 0.18μm CMOS process and the chip occupies an area of 0.05mm2. The measurement result shows that the sensor value exhibits good linearity within the range of 10-90%RH and the interface circuit consumes only 1.05μW at 0.5V supply voltage.
Design and Realization of the Explosion-Proof Three-Level Frequency Conversion Equipment for Coal Mine
Authors: Lu Wen Tao , Li Zhi Yuan , Zhu Hai Jun
Published: May 2014

The realization method of the explosion-proof three-level frequency conversion equipment for coal mine is introduced in this paper. The frequency conversion equipment uses diode clamped three-level inverter unit topology structure, it overcomes some disadvantages of two-level converter that harmonic content of voltage output is higher, electromagnetic interference is serious and on-off loss is higher. The frequency conversion equipment is suitable for coal mine high voltage and large power devices such as draught fan, pumps and belt conveyers.
Analysis of Random Vibration Fatigue Life Based on Fluctuation Wind for Antenna Structure
Authors: Gong Qi , Li Yan , Su Duo
Published: May 2014

Aimed at fatigue damage in the antenna structure caused by large amplitude vibration with long time fluctuating wind loads, this paper use the harmonic synthesis method to transform power spectrum of Davenport fluctuating wind to fluctuating wind speed time series based on time domain. Then comprehensively considering the surface roughness coefficient, wind pressure coefficient of variation with height, wind vibration coefficient in Beijing area ,it transforms the fluctuating wind speed into the fluctuating wind pressure curve, takes the structural dynamics simulation and is obtained the dynamic response of the antenna structure in turbulent wind Loads; By the method of rain-flow counting , the fatigue life is analyzed with the statistics for the dangerous location of the antenna structure coursed of fatigue stress with time.
Analysis and Optimization Design of DRX Mechanism for Power Saving in LTE
Authors: Yu Xiang , Song Yao
Published: May 2014

With the rapid development of emerging applications and data transmission rate in LTE (Long Term Evolution) system, terminal power consumption is becoming seriously. In LTE, the discontinuous reception (DRX) mechanism was taken as an important method of saving energy of terminal. Through operations of all sorts of timers, a detailed analysis of the principle of DRX is introduced in this paper. And based on this, adjustable DRX long cycle is proposed. On the basis of the DRX semi-Markov process and ETSI data model, formulas of power saving factor and wake-up delay for adjustable LTE DRX are derived. Then from the comparisons of fixed frame DRX cycle and adjustable DRX cycle in terms of power saving and wake-up delay, we know that this optimizing mechanism has obvious improvement in the reduction of terminal power consumption.
The Simulation Study of Direct-Current Control Technology for Three-Phase Voltage Type Rectifier
Authors: Jun Rong
Published: May 2014

The diode uncontrolled rectifier or the phase controlled rectifier is widely used in conventional rectifier link, thus the conventional rectifier link on the grid inject a large number of harmonics and reactive power, and they cause a severe grid “pollution”. This paper starts from the basic principles of the PWM rectifier, then the paper discusses the topological classification of three-phase PWM rectifier in detail. Based on topological structure, the paper builds the mathematical model of three-phase stationary coordinate system and two-phase rotating coordinate system. Based on space voltage vector, the paper studies PWM control method in-depth and simulates in Matlab/Simulink. The correctness of the theoretical study of three-phase voltage source PWM rectifier system is verified by the simulation results.
The Research on the Winding Deformation Testing System for 10kV Transformer Based on the LabVIEW
Authors: Yang Hai Sheng , Liu Ling , Shi Cheng Jie , Chen Tao , Wang Yan Bo
Published: May 2014

In order to discover the hidden trouble of the 10kV transformer, in this paper, on-line monitoring system based on LabVIEW is developed. The paper briefly introduces the basic concept of the virtual instrument and the frequency-response analysis (FRA), and then it expounds the development process of the hardware and software of this system. The hardware performs the main functions: signal injection, filtering, amplifying, signal conditioning, and storing the result in computer. The software includes four modules: user login, data acquisition, data analysis, data query. Finally, the monitoring system is validated by a corresponding experimental study.
Reliability Test and Analysis of Electrical Automation Control Equipment
Authors: Li Ming
Published: May 2014

Improve the reliability of electrical automation control equipment is hot issues manufacturer and user have been focused on, therefore, the relevant measures must be taken to strengthen the reliability of the electrical automation control equipment. This paper discusses on the reliability test method and the status quo of electrical automation control equipment, and further discusses the measures to improve the reliability of the electrical automation control equipment and the choice of control equipment reliability test method of.
Fuzzy Self-Tuning PI Control for the Upper Limb Rehabilitation Robot
Authors: Cui Yu Ding , Xiong Cai Hua
Published: May 2014

It is well known that the robot powered by pneumatic muscle actuator (PMA) which with highly nonlinear, time lag and time-varying characteristics is not easy to control. In this paper, we presented a hybrid fuzzy and PI controller for the upper-limb rehabilitation robot which was designed and built in our lab to assist patients post-stroke in the rehabilitation. The experimental results showed that controller can improve dynamic and static performance of the device, then it can control robot effectively to aid patients carrying on the systematized recovery training.
The Mathematical Models and Simulation on Work Roll Bending Control System of Cold Rolling Mill
Authors: Wang Yan Ping , Yang Xin Bing , Jin Yao Hui , Liu Bao Quan , Wang Jun Sheng
Published: May 2014

The calculated result of the mathematical model based on the conventional transfer function has bigger deviation than the measured. In this paper the mathematical model of the work roll bending is derived. The modeling is different from conventional modeling used many presumptions and linear processing. The modeling calculated accurately the equivalent load spring using the method of influence function. The simulation results agree well with actual data of the bending system.
The Research of Multi-Car Elevator Control Method Based on PSO-GA
Authors: Liu Jian , Bai Zi Long , Gu Meng Hua , Zhang Xu , Zhang Rui
Published: May 2014

Multi-car elevator system is a new technique which can reduce the occupied area and improve the transport efficiency in the high-rise and super high-rise buildings. It is remain to be studied in both the control strategy and scheduling method compared with the traditional single elevator group control system, In order to improve the utilization rate and shorten the waiting time, the particle swarm algorithm PSO and GA genetic algorithm optimization control method are studied aiming at the rationality of scheduling strategy of the rationality of elevator. Combining the advantages of two algorithms proposed a novel optimal scheduling algorithm for PSO-GA and carried on simulation analysis, the experimental results demonstrate the effectiveness of the new method of improved PSO-GA.
Furnace Temperature Control and Simulation
Authors: Tong Ming Yu , Xu Di Jian , Shi Jin Liang
Published: May 2014

with the rapid development of science and technology, in all fields of temperature control system of the precision, stability and other requirements of increasingly high, the control system is the myriads of changes. Computer measurement and control technology, the traditional electronic measuring changed dramatically in the principle, function, accuracy and automation degree, degree of automation of the scientific experiment and application engineering to improve. Temperature control key lies in the two aspects of temperature measurement and control. Temperature measurement is based on temperature control, this technology is quite mature. But because of the increasingly complex control object, control in the temperature still exist many problems. This thesis presents the design of industrial temperature resistance furnace computer using PID algorithm, Smith predictive control algorithm, darin algorithm, three algorithms are studied based on the control system, and the control algorithm was simulated using the MATLAB simulation software, and the advanced control algorithm is studied [1-3].
Research on a New Hybrid Robot Real-Time Testing System
Authors: Luo Ji Man , Lin Qiao Zhi , Sun Xiao Wei , Li Gen Biao , Cui Yan Nan
Published: May 2014

To achieve real-time monitoring for new type of robot motion state, the testing software of robot motion characteristics is studied in this article, based on Linux system, using Qt software compiling. First of all, the new robot prototype and test hardware system are introduced; secondly, the real-time testing curve of displacement, velocity and acceleration are compiled by fitting of the measured data, on the Linux operating system platform, using Qt programming; finally, the testing software run, and its accuracy is verified by experiment.
Passive Magnetic Detection of Optical Fiber Submarine Cable
Authors: Zhang Yang , Zhou Xue Jun , Zhang Zhen
Published: May 2014

In order to detect optical fiber submarine cable effectively, based on magnetic anomaly detection, the article presents a method for calculating magnetic field of central tube and layer stranded submarine cable by modeling. SQUID proved can be applied in the passive magnetic detection of optical fiber submarine cable.
Robust Zebra-Crossing Detection for Autonomous Land Vehicles and Driving Assistance Systems
Authors: Wang Chao , Wang Huan , Wang Rui Li , Zhao Chun Xia
Published: May 2014

Road scene understanding is critical for driving assistance systems and autonomous land vehicles. The main function of road scene understanding is robustly detecting useful visual objects existing in a road scene. A zebra crossing is a typical pedestrian crossing used in many countries around the world. When detecting a zebra crossing, an autonomous lane vehicle is normally required to automatically slow down its speed and to trigger a path-planning strategy for passing the zebra crossing. Also, most of driving assistance systems can send an early-warning signal to remind drivers to be more careful. This paper proposes a robust zebra-crossing detection algorithm for autonomous land vehicles and driving assistance systems. Firstly, an inverse perspective map is generated by utilizing camera calibration parameters to obtain a bird-eye view road image. Secondly, a course-to-fine detection process is applied to obtain a candidate zebra-crossing region and finally a true zebra-crossing region is recognized by combining appearance and shape features. Experiments on several kinds of real road videos which also include several challenge scenes demonstrate the effectiveness and efficiency of the proposed method.
The Intrusion Detection Model of Medical Information Diversity Database under Cloud Computing
Authors: Zhang Qi Lai , Cong Pei Cai , Meng Fan Bo , Yang Jian Ping , Wang Bin
Published: May 2014

In current large databases, there is a widespread defect of poor immunity. It is mainly due to the huge amount of data which makes the traditional algorithm falling into a defect of low efficiency of local search, causing inconspicuous effect to detect potential risks and other defects. To this end, we propose an intrusion detection model of medical information diversity database under cloud computing. By using the similar risk attributes of data, an intrusion test model under cloud computing environment is constructed. The use of intrusion tolerance theory can reduce the impact of failure report phenomenon for the stability of whole system. This model can effectively resist denial of service attacks, but also through the mutual cooperation between the servers to prevent the single failure node attacking to the system, ensure the safety and smooth of the cloud computing services at the greatest degree, in order to enhance the user experience. Experiments show that the algorithm improves the accuracy of the intrusion detection of medical information diversity database, and achieves good results.
Research on SVM-Based Intelligent Traffic Target Recognition Algorithm
Authors: Wang Li Ping , Sun Da Chun
Published: May 2014

with the rapid development of intelligent mathematics and artificial intelligence, intelligent target recognition technology has become the new direction of the target recognition research and development. The Traffic Target Recognition is one of the intelligent target recognition technology applications in the transport field. It is one of the key issues of intelligent traffic analysis and a powerful guarantee of traffic system security. It has far-reaching theoretical and practical application value. According to some research, the support vector machine method shows better ability to adapt and promote than traditional classification methods and obtains better result in image recognition. This paper presents an intelligent transportation target recognition method based on support vector machine (SVM). Experimental results show that the target recognition method has strong classification and identification capability.
Study on Vehicular PEMFC Humidity Measurement Based on Fuzzy Sets
Authors: Tan Bao Hua , Quan Shu Hai , Cao Xiao Lei
Published: May 2014

The internal humidity of vehicular proton exchange membrane strongly influences the performance of PEMFC, but it cannot be measured directly because of the special closed structure. Generally, the internal humidity is equivalent as the water content of the membrane. This paper studies the problem in humidity measurement. In the base of analysis about PEMFC water content mechanism, and by taking Fuzzy Sets as method, this paper builds a PEMFC humidity status monitor system model, which can monitor the humidity value and evaluate the FC system humidity status. The simulation results show that the model is working properly.
The Determination of Deformation Monitoring Indices Using Lifting Wavelet and Multi-Component Cloud Model
Authors: Liu He Zhi , Ding Nan , Qin Dong , Liu Jing Yang
Published: May 2014

As one of the most significant indices to estimate dam behavior, the study of deformation monitoring indices has become a hot spot recently. In this paper, a method based on lifting wavelet and multi-component cloud model is proposed. For this method, the time dependent component which can evaluate the dam behavior is decomposed and reconstructed by lifting wavelet firstly. According to the time dependent component, those monitoring data which can reflect the present situation of dam could be chosen. After that, compute the deformation monitoring indices of each component based on the valid data through the multi-component cloud model. And then the deformation monitoring indices of dam as well as the certainty degrees could be acquired finally. The proposed approach is tested with cloud model based on the whole monitoring data and typical small probability method relies on 1% and 5% significance level respectively. Experimental results show that this proposed method yields an excellent performance in calculating the dam safety deformation monitoring indices, which could be utilized in actual projects.
Application of Ant Colony Algorithms and Neural Networks in Fault Diagnosis
Authors: Yu Jing Bo
Published: May 2014

Neural network technology is widely applied due to its computational simplicity and versatility. But, this method has some weak points, for example, slow convergence, less accurate and easy to fall into local minimum points. Combined ant colony algorithm and neural network for fault diagnosis, it can overcome the limitations of a single fault diagnosis method. Ant colony neural network method is applied to gearbox fault diagnosis, the results show that the diagnosis with characteristics of high precision, strong scientific and practical wider.