bluuebunny/crossref_metadata_2025 huggingface dataset:
Eleven microsatellites in an emerging invader, Phytolacca americana (Phytolaccaceae), from its native and introduced ranges
Authors: Bentley Kerin E. , Berryman Kaelyn R. , Hopper McGee , Hoffberg Sandra L. , Myhre Karin E. , Iwao Keisuke , Lee Jared B. , Glenn Travis C. , Mauricio Rodney
Published: March 2015

Premise of the study:

To facilitate population genetic analyses, microsatellite markers were developed for pokeweed (Phytolacca americana), a large, weedy, perennial herb native to eastern North America that is emerging as a significant invasive species in China.

Methods and Results:

We mined 1,100,538 Illumina MiSeq reads from genomic DNA for microsatellites and identified 58 primer pairs. We screened these primers for polymorphism in two native and two invasive populations. We identified 11 loci that amplified consistently. The number of alleles per locus ranged from two to six, and observed heterozygosity ranged from 0.00 to 1.00. All loci were largely monomorphic within populations but different among populations. The primers were of very limited use in the congener P. acinosa.

Conclusions:

These loci will provide a valuable resource to study the population genetics and invasion history of P. americana.
C-5’-Triazolyl-2’-oxa-3’-aza-4’a-carbanucleosides: Synthesis and biological evaluation
Authors: Romeo Roberto , Carnovale Caterina , Giofrè Salvatore V , Chiacchio Maria A , Garozzo Adriana , Amata Emanuele , Romeo Giovanni , Chiacchio Ugo
Published: March 2015

A novel series of 2’-oxa-3’-aza-4’a-carbanucleosides, featured with a triazole linker at the 5’-position, has been developed by exploiting a click chemistry reaction of 5’-azido-2’-oxa-3’-aza-4’a-carbanucleosides with substituted alkynes. Biological tests indicate an antitumor activity for the synthesized compounds: most of them inhibit cell proliferation of Vero, BS-C-1, HEp-2, MDCK, and HFF cells with a CC50 in the range of 5.0–40 μM. The synthesized compounds do not show any antiviral activity.
The Engagement Model for Reducing Seclusion and Restraint: 13 Years Later
Authors: Blair Martha , Moulton-Adelman Fletcher
Published: March 2015

In 2001, an inpatient psychiatric unit sought to greatly reduce, or even eliminate, the use of seclusion and restraint by initiating the Engagement Model. Despite many changes in management and staff, the model has remained largely intact and effective during the past 13 years. The current article reflects on key clinical interventions and leadership approaches that have helped sustain the culture change undertaken to better serve patients on this unit. [
Journal of Psychosocial Nursing and Mental Health Services, 53
(3), 39–45.]
Application of a Hydrogel Ocular Sealant to Avoid Recurrence of Epithelial Ingrowth After LASIK Enhancement
Authors: Yesilirmak Nilufer , Diakonis Vasilios F. , Battle Juan F. , Yoo Sonia H.
Published: March 2015

PURPOSE:

To report a case of clinically significant epithelial ingrowth after LASIK that was successfully treated with a hydrogel ocular sealant in combination with flap lifting and scraping technique.

METHODS:

Case report.

RESULTS:

A 56-year-old woman underwent LASIK and a LASIK enhancement procedure in 2002 and 2012, respectively. Six months after the enhancement, visually significant epithelial ingrowth developed in both of her eyes. The left eye was treated with flap lifting, scraping, and suturing, and the right eye was treated with a hydrogel ocular sealant in combination with flap lifting and scraping. No recurrence was evident during a 6-month follow-up period and visual acuity improved in both eyes. No adverse effects were noticed.

CONCLUSIONS:

Recurrent epithelial ingrowth may be successfully avoided with the intraoperative use of a hydrogel ocular sealant combined with flap lifting and scraping. This approach could be used as an alternative to LASIK flap suturing.

[
J Refract Surg.
2015;31(4):275–277.]
A Geospatial Approach for Estimating Suitable Habitat and Population Size of the Invasive Northern Snakehead
Authors: Love Joseph W. , Newhard Joshua J. , Greenfield Brett
Published: March 2015

Northern snakehead Channa argus, an invasive predatory fish species from Asia, may continue to establish itself throughout temperate areas of the eastern United States, particularly in shallow vegetated habitats of ponds and streams. The species was first collected in the Potomac River in 2004 and has become successfully established in several major rivers within the Chesapeake Bay watershed. The objectives of this work were to develop habitat suitability criteria using a novel methodology that combines geographic information systems technology and fish surveys to estimate population sizes. A combination of catch data and reported or empirically derived habitat relationships were used to analyze seasonal distributions (March–October) in two tidal freshwater tributaries of the Potomac River: Nanjemoy Creek (2013) and Chopawamsic Creek (2010–2013). Adults were collected in relatively deeper sections of the streams (average depth 0.7–1.0 m) with a low cover of submerged aquatic vegetation (0–21% of site). Using additional distributional data, we identified suitability criteria as: 1) edges of submerged aquatic vegetation that included 5 m of vegetation and 5 m of adjacent open water; 2) less than 30% of mid-channel distance from shore, which may or may not include submerged aquatic vegetation; and 3) the upper 15% of the tidal freshwater stream. An adult population estimate derived from a suitable area in Pomonkey Creek (a tributary of the Potomac River) and estimated densities from Nanjemoy Creek and Chopawamsic Creek (i.e., three adults/ha) was not different from that expected using electrofishing surveys. Assuming approximately 7,093 ha of suitable habitat and three adults/ha, the number of adults was predicted to be 21,279 for 44 major tidal freshwater tributaries of the Potomac River. This is our first estimate of population size of northern snakehead for any river of the Chesapeake Bay watershed and its accuracy will undoubtedly improve as additional studies report variation in density for other tributaries. Because of the species’ ability to establish itself in temperate climates, it is important to engage the public to prevent additional releases of northern snakehead, especially to vulnerable habitats.
Research on Hop-Based Secure Positioning Algorithm in WSN
Authors: Luo Jun , Han Song , Lu You Li
Published: March 2015

In order to further improve the performance of node positioning system and intrusion tolerance in Wireless Sensor Network (WSN), taking advantage of the redundant information within multi-hop sensor networks, a secure location algorithm which based on node hops, consistence aggregation and gradient descent (HCAGD) was put forward in this paper. In which the ideology of Hop-based node positioning algorithm was used for getting reference positioning information; the gradient descent algorithm was used for position estimation.
Trust Model of P2P Network Based on Fuzzy Degree of Credit
Authors: Shen Yun Cheng , Zhang Hong , Duan Xu Liang
Published: March 2015

At present P2P is widely applied on the Internet. But it still has a safety hazard because of the special feature of dynamic and anonymity of P2P.This paper designs a model of P2P trust based on fuzzy degree of nodes' credit. It computes the fuzzy degree of nodes' credit according to the historic records and the theory of fuzzy mathematics, and the result is used as the basis of choice of P2P transaction. The fuzzy degree of nodes' credit will be increased and decreased according to the behavior of the node, establishing the dynamic and reasonable mechanism of rewards and punishment. Experimental results show that the model designed in this paper has a better performance in the parts of trade success rate and network load.
Model-Based Synthetical Optimization Analysis on Navigation Performance of Unmanned Surface Vehicle
Authors: Ma Tian Yu , Yang Song Lin , Hang Cen , Yu Qiang , Wen Yi Yan
Published: March 2015

Unmanned Surface Vehicle (USV) has very complex forces and states when sailing at sea. While the optimization of USV via regression equations usually has a lower precision. Rapidity and seakeeping tests have been conducted based on a USV model of JUST. The rapidity test is mainly ship model resistance test and the seakeeping tests include wave added resistance test, hydrostatic pitching test, pitching and heaving test under the wave. Response surfaces fitting vectors of rough water resistance, pitching significant value, heaving significant value is established while using VC++ language to write second-order response surface fitting programs after dimensionless conversion of test data. Mathematical model of USV navigation performance synthetical optimization is proposed, including systems of rapidity, maneuverability and seakeeping. A layered parallel genetic algorithm (L-P-GA) optimization program is written in VC++ language, which can optimize a variety of conditions with different design speed and displacements. The results indicate that the optimization method has a higher precision and it can provide an opportunity to optimize the navigation performance of USV effectively.
An Improved Genetic Algorithm for Multi-Depot Heterogeneous Vehicle Routing Problem with Simultaneous Pickup and Delivery Time Windows
Authors: Cai Yan Guang , Tang Ya Lian , Yang Qi Jiang
Published: March 2015

Multi-depot heterogeneous vehicle routing problem with simultaneous pickup and delivery and time windows (MDHVRPSPDTW) is an extension of vehicle routing problem (VRP), MDHVRPSPDTW mathematical model was established. The improved genetic algorithm (IGA) is proposed for solving the model. Firstly, MDHVRPSPDTW is transferred into different groups by the seed customer selecting method and scanning algorithm (SA).Secondly, IGA based on elite selection and inversion operator is used to solve the model, and then cutting merge strategy based on greedy thought and three kinds of neighborhood search methods is applied to optimize the feasible solutions further. Finally, 3-opt local search is applied to adjust the solution. The proposed IGA has been test on a random new numerical example.The computational results show that IGA is superior to branch and bound algorithm (BBD) by Lingo 9.0 in terms of optimum speed and solution quality, and the model and the proposed approach is effective and feasible.
A Low-Cost MEMS Implementation Based on Sensor Fusion Algorithms
Authors: Wang Xian Wei , Jiang Jun Hai
Published: March 2015

In this paper a low-cost Micro-Electro-Mechanical System (MEMS) inertial measurement unit is designed, a 3-axis accelerometer and 3-axis gyroscope simulated 6 degrees of freedom orientation sensing through sensor fusion. By analyzing a simple complimentary filter and a more complex Kalman filter, the outputs of each sensor were combined and took advantage of the benefits of both sensors to improved results. The experimental results demonstrate that the output signal can be corrected suitability by means of the proposed method.
Existence and Uniqueness of Weak Solutions to a Thin Film Type Equation
Authors: Liang Bo , Shen Hui Ying , Peng Xi Ting , Wang Mei Shan
Published: March 2015

This paper is concerned with a fourth order parabolic equation in multidimensional spacewith boundary condition u=Δu=0 and initial function u0. The minimizer method yields the existence and uniqueness for the elliptic equation. Finally, the existence and uniqueness of solutions of the corresponding parabolic equation are obtained from the semi-discrete problem.
An Image Classification Algorithm Based on SVM
Authors: Qian Chun Hua , Qiang He Qun , Gong Sheng Rong
Published: March 2015

Image classification is a image processing method which to distinguish between different categories of objectives according to the different features of images. It is widely used in pattern recognition and computer vision. Support Vector Machine (SVM) is a new machine learning method base on statistical learning theory, it has a rigorous mathematical foundation, builts on the structural risk minimization criterion. We design an image classification algorithm based on SVM in this paper, use Gabor wavelet transformation to extract the image feature, use Principal Component Analysis (PCA) to reduce the dimension of feature matrix. We use orange images and LIBSVM software package in our experiments, select RBF as kernel function. The experimetal results demonstrate that the classification accuracy rate of our algorithm beyond 95%.
An Improved Method for CT Image Coding Using PSNR Prediction Model Based on ELM
Authors: Zhu Han Yang , Jin Xin Yu , Shen Jian Feng
Published: March 2015

In telemedicine, medical images are always considered very important telemedicine diagnostic evidences. High transmission delay in a bandwidth limited network becomes an intractable problem because of its large size. It’s important to achieve a quality balance between Region of Interest (ROI) and Background Region (BR) when ROI-based image encoding is being used. In this paper, a research made on balancing method of LS-SVM based ROI/BR PSNR prediction model to optimize the ROI encoding shows it’s much better than conventional methods but with very high computational complexity. We propose a new method using extreme learning machine (ELM) with lower computational complexity to improve encoding efficiency compared to LS-SVM based model. Besides, it also achieves the same effect of balancing ROI and BR.
Research on the Master Meter Method and Static Weight Method Flow Standard Device
Authors: Qin Xue
Published: March 2015

Flow standard device not only is the reference and transferring of flow unit value, but also is widely used as experimental device .The research and application of it is an important link in the development of flow measurement and test technology. In view of the characteristics of industrial application fields, A set of "standard and combined" water flow device is researched and designed in the paper. The device will be static weight method and the standard meter method gives reasonable collocation from system scale and uncertainty synthesis, it can realize the verification and experimental studies of various velocity type flowmeter has the characteristics of high verification efficiency, low cost and high automation. More than flow meters have been calibrated on the device. It is confirmed by the operation status and the experimental data that every technology criterion has reached the design requirements, and it proved is reasonable to the design scheme about water flow standard device of master meter and static weight method.
Design and Implementation of A-SMGCS Terminal
Authors: Li Jing , Wu Lin Min , Zhu Pan
Published: March 2015

This paper aims at the problems of safety and efficiency of airport,designs and implements an Advanced Surface Movement Guidance and Control System (A-SMGCS) terminal, discusses the goals and key technologies about the system,including cache design of aircraft targets, and efficiency improvement of a large number of targets on the aerodrome.Finally,we give the test and conclusions of the system at a international airport in China.
Research on the Resource Scheduling in Emergency Response Based on ACA
Authors: Gao Zhan , Zhu Qing Bo
Published: March 2015

This paper mainly studies the emergency resource scheduling algorithms and optimization problems. Through study the effect of explain emergency supplies of resources system, understanding the characteristics of emergency resource, emergency scheduling characteristics and process, and the characteristics of the demand for resources. Emergency resource scheduling model for emergencies, and emergency management by learning the theory and method of study, effective analysis of disaster impact on resource supply system. Select the appropriate scheduling, to the disaster area resources required for effective and reasonable to rise and scheduling is advantageous to the resource scheduling work smoothly. Emergency resource scheduling model is established, provide certain theoretical support for the actual emergency scheduling decisions.
Numerical Analysis of Tension Force Subjected by Flexible Mattress
Authors: Li Zhen Yu , Yang Ping , Sun Zhi Hua , Liu Lin Suan
Published: March 2015

The nonlinear FEM analysis is performed to the problem of large strain nonlinear application for flexible mattress. The element with cloth type option is used to establish the FEM model for the analysis of flexible mattress. The simulation can produce correct profile of deformation, accurate distribution of stress and strain, meanwhile taking account of geometric nonlinear from large strain. The results of the paper are compared with those from the theory and in-situ test. Some valuable conclusions are made from the results analysis.
The Analytical Simulation of Squirrel Cage Induction Generator-Rectifier System Based on SPWM
Authors: Jia Ying , Hu Jian Xin , Wu Meng
Published: March 2015

In the full power wind power system, the cage induction wind generator-rectifier system can be regarded as a independent part if the DC voltage could be always controlled constant by inverter part. The prospective AC voltage and frequency of induction generator is dependent on the specific speed and input power, which is obtained by use of SPWM. All rectifier switching state and the alternating moments can be calculated by switching function given by SPWM control. This paper focuses on how to use analytical methods to calculate the process of alternately switching the state of the system. Furthermore, the dynamic mathematical model of induction generator is studied and derived under different states, which is suitable for analytical method on base of Laplace transform.
Study on Thermal Storage Device Model and Control Strategy for Cogeneration and Wind Power Heating System
Authors: Zhang Le Ping , Chen Lei , Wang Xiao , Huang Peng , Ding Mao Sheng , Li Juan
Published: March 2015

Resources of wind power due to its presence greater volatility, increasing the difficulty of regulating for the power grid. In the supply side, by installing thermal storage device to the cogeneration units so as to increase the adjusting capacity in the supply side of the power system, in the load side, the wind power heating system added heat storage device, increasing the load that can be adjusted. These two measures could be better to solve the problem that part of the abandoned wind. In this paper, analyzed the theoretical basis of each system briefly, added thermal storage device in electric –thermal combine system, and the thermal storage device installation position has been described too. Due mostly theoretical on thermal storage device is about the thermodynamic aspects, it is rather strange for electricity workers, so in this electrical-thermal combined system, its thermal storage devices and electric boiler thermal model have been made a simple analysis and described its control strategy. The control strategy was a comprehensive coordination to the power grid, meanwhile, taking into account the hysteresis characteristics, delay effects and daily regulation plan features of the thermodynamic parameters of thermal storage system make a reasonable start-stop control strategy finally.
On the Research of Identification Methods for Supercapacitor Model Parameters
Authors: Li Qi , Zhang Wen Bin , Li Ping , Su Shi , Yan Yu Ting , Yang Yang
Published: March 2015

The accuracy of model becomes increasingly demanding in the simulation system with the development of supercapacitor. The traditional methods of parameters identification in supercapacitor modeling are very complicated. This paper presents an easy and new method by the Simulink tool. The experimental data for the identification of the model parameters was obtained through the constant charge-discharge experiments. Then the variable capacitor of the supercapacitor equivalent circuit model was modeled in Simscape Language, so parameters directly got with Parameter estimation in Sumulink. Simulation results were presented and compared experimental data. And the result showed that the new method was not only speeded the identification of parameters, but also improved the modeling precision up to 98%.
An Integrated Fault Diagnosis Method Based on the ICA-SVM
Authors: Ji Zhen Ping , Zhang Xiao Jie
Published: March 2015

For sets of measurements does not follow a Gaussian distribution, the conventional principal component analysis (PCA) method has the disadvantage of low diagnostic yield. An integrated fault diagnosing method based on the independent component analysis (ICA) and support vector machine (SVM) was proposed. The observed data is preprocessed and feature extracted by ICA and a monitoring model was developed. When the fault is detected, SVM is adopted to classifying and diagnosing the type of faults. It is applied for fault diagnosing in the Three-Tank water level control system. The simulation results show that the fault diagnosis rates of this method is 99.8%, which can effectively detect and diagnose the fault.
FE Modeling of the Inertia Friction Welding with a Modified Friction Law
Authors: Zhang Quan Zhong , Hu Li Fen , Li Wu Bin , Gu Jiu Chun
Published: March 2015

The subject of this paper was the presentation of a holistic, fully-temperature-coupled FE model of inertia friction welding based on the modified friction law, which divided the friction welding process into beginning friction stage and steady equilibrium friction stage. At each of the stage Coulomb friction model and shear friction model were adopted respectively. The present FE model predicted the temperature of the welding joint as well as variation of friction torque and relative rotating velocity of the work-piece during the welding process. The evolution of friction torque and rotating velocity were compared with the experimental measurement. They showed a good agreement between them.
Identification Methods of Modified Prandtl-Ishlinskii Model for Giant Magnetostrictive Actuator
Authors: Xiao Bo Han , Zhou You , Zhai Peng
Published: March 2015

Modified Prandtl-Ishlinskii model is a phenomenological model widely used to characterize and compensate the hysteresis nonlinearity of piezoelectric material or magnetostrictive material. In addition, the identification method is the key section to determine the accuracy of the model. In this paper, mathematical principles of 3 identification methods are appealed and compared, then effects of the model are examined under 10Hz excitation frequency.
An Image Segmentation Algorithm Based on Watershed Transform
Authors: Wang Yin Long , Li Qian Jin , Li Zhi Xiang
Published: March 2015

An improved image segmentation algorithm based on watershed transform is presented In this paper. Firstly the normalized cut method and watershed transform are explained and analyzed. Secondly the idea of the improved algorithm and the main formula are explained. We consider the area and perimeter when we merge adjacent regions. We define a new weight value and discuss the value of the parameter α and β. Finally the experiment result is presented. The new algorithm reduces the nodes and the computational demand of the common normalized cut technique.
Modeling for Reputation Computing Research Base on C2C Communities
Authors: Liao Xin Kao , Wang Li Sheng , Wang Ke Te , Xu Xiao Jie
Published: March 2015

Trust is part of the main problems in the development of C2C e-commerce. Calculating the value of reputation based on feedback rating is an effective way to create trust in e-commerce transactions. This paper proposes a computing model built on the reputation of e-commerce by introducing a feedback score, the transaction value, time, penalty factor and other parameters. Simulation results demonstrate that the model can effectively prevent the credibility of slander, reputation hype, reputation conspiracy and other issues.
The Time-Space Distribution Character and Influences of PM2.5 in Nanning, Guangxi
Authors: Huang Jiong Li , Chen Zhi Ming , Mo Zhao Yu , Liu Hui Lin , Mao Jing Ying , Wei Yan Hong , Liang Gui Yun
Published: March 2015

Few study was about the fine particulate matter (PM2.5) in Nanning. This paper analyzed the time-space distribution character and influences of PM2.5in Nanning. We collected data of 4 monitoring stations in 2013 year in Nanning, Guangxi. Our results showed that concentration of PM2.5in Nanning were Dec. > Jan > Oct. > Nov. > Mar. > Apr. = Sep. > Feb. > May = Aug. > June > July. The obvious hazy day occurred in winter and autumn. The monitoring stations located in the north suffered higher PM2.5pollution compared with the other stations. Concentration of PM2.5was significantly higher in the month when currents came from island than the month when currents from sea. The increased monthly concentration of PM2.5was associated with the northwest and northeast currents from inland. A combination of lower speed of wind, northwestly wind and regional transport made contribution to the evaluated PM2.5concentration.
Application of Gray Correlation Method Fracturing Effect Main Controlling Factors Analysis in JI006 Block
Authors: Guo Jiao Jiao , Liu Wei Dong , Liu Jin Jun , Ye Jun Hua , Tang Xiao Chuan , Yin Hui , Sun Kai , Long Sha Sha
Published: March 2015

JI006 block is a key blocks of improve productivity in the JI7 well area. This blocks development of well after fracturing,the fracturing effect are different. To further improve the block after the fracturing effect,should focus on the analysis of influence factors of productivity after fracturing. But have different influence factors and influence degree. In order to analyze the influence of various factors on the Fracturing effect influence degree. This paper uses the grey correlation analysis method to the JI 006 block 15 fracturing Wells formation parameters and fracturing parameters influence after the pressure effect is analyzed,To determine the factors influencing the Fracturing effect. Analysis results is more accurate, the method to choose well layer and the fracturing design and construction has certain guiding significance.
Study on Enzyme Hydrolysis Process and Antioxidant of Buckwheat
Authors: Liu Ying , Ma Yu Xuan , Ma Ting Jun , Jia Chang Xi
Published: March 2015

Keeping concentration of 10%, study the influence of gelatinization temperature, digestion temperature, digestion time, adding amount on centrifugal sedimentation rate of tartary buckwheat beverage , optimize the best conditions of buckwheat enzyme hydrolysis as following: gelatinization temperature of 80 °C, enzyme amount 120 U/g, enzyme temperature of 80 °C, enzyme solution time 70 min, while the centrifugal sedimentation rate was 20.04%.The amount of total flavonoid is 0.1258mg/g and total phenolic acids is 0.3767μg/g. The ability of radical scavenging activities DPPH (95.23%) and ABTS (98.29%) is stronger than other cereal beverages.
Carbon Emission Assessment for Typical Household Appliances Orienting the Green Supply Chain Management for Enterprises
Authors: Chen Jian Hua , Guo Hui Ting , Sun Liang , Bo Wei , Chen Liang
Published: March 2015

This paper explores on the green supply chain management for enterprises based on the carbon emission assessment for products. The assessment showed that the priorities of green supply chain management measures were different for washing machine, air conditioner and microwave. The washing machine manufacturer should firstly focus on the measures to the upstream suppliers associated with the product eco-design, and secondly the product energy efficiency increase. The air conditioner manufacturer should first focus on the product energy efficiency increase, and secondly the eco-design, especially the refrigerant improvement. But the energy efficiency increase would be the only effective way for microwave. This work shows the method applies to the household appliance manufacturer to identify the green supply chain hot point, as the information of products is easier to obtain, and the effort performance could be shown intuitively along with the consuming process.
Comparative Analysis on the Calculation Method for Building Operational Energy Consumption
Authors: Wu Ya , Zhou Jing Yang , Yan Hang , Shen Li Yin
Published: March 2015

This paper presents a comprehensive review on various methods for calculating the energy consumption for building operation. These methods are classified into five categories, including methods based on energy statistics, simulation methods based on unsteady state of energy consumption, the simplification methods based on steady state of energy consumption, energy rating label methods and energy monitoring methods. Through comparing and analyzing the characteristics, calculation content and scope of the application of these five methods, the advantages and disadvantages, applicability of each method to different type of buildings are examined. The results of this paper can be used to guide users to choose suitable method to calculate the operation energy consumption of the buildings with different types and architectural characteristics.
Effects of Different Working Conditions on the Performance for a New Organic Flow Battery
Authors: Li Ji Lei , Li Xin , Zhang Shu
Published: March 2015

In this study, effects of different working conditions on a organic flow battery performance were investigated. The organic redox flow battery was assembled based on AQS as positive material and Br2/HBr as negative material. So there were no metal ions in the new battery. When the electrolyte flow rates or the currents were changed, the battery performance changed apparently. Higher flow rate can improve battery performance, while higher current can reduce the battery discharge capacity and discharge voltage. As the improvements are limited, we need choose the appropriate working conditions to get the best battery performance in practical applications.
High Capacity High-Speed Switch Application Analysis and Action Process Simulation
Authors: Zhao Tie Ying , Liu Jun Ling
Published: March 2015

This paper analyzed high capacity high speed switch’s works and structures, proposed a parallel structure of high capacity high speed switch (FSR) with current limiting reactor. Through analysis of its action process, this paper used EMTP/ATP to simulate FSR action process, analyzed line current and voltage changes in normal and short circuit station. Simulation results show that the method can effectively limit short circuit current level.
No-Load Voltage Waveform Computation of the Different Design Schemes of Stator Slots Skewing Degree of Tubular Hydro-Generator
Authors: Zhang De Wei , Fan Zhen Nan
Published: March 2015

To reduce the tubular hydro-generator no-load voltage waveform distortion,some different design schemes of stator slot skewing degree in a 36MW fractional slot tubular hydro-generator (q=11/2 ) are calculated and compared. Then, the relation of the no-load voltage waveform harmonic distortion factor (HDF) and stator slot skewing degree are revealed. The research provides the important reference informations for the optimization of no-load voltage waveform , and it is helpful for improving the industral design and manufacture standard of tubular hydro-generator.
OCT Signal Processing Method Based on Sequential Kalman Filtering
Authors: Yan Yu Heng , Li Yan Song
Published: March 2015

Optical current transformer (OCT) measured current signal which is mixed with strong random noise. The measured readings can’t accurately reflect the value of the measured current. Since the optical current transformer noise inside the band is basically where the measured current signal overlap,we can not use the traditional method to filter it out. This paper describes the measurement principle based on the Faraday effect of optical current transformer and signal to noise characteristics. Considering optical current transformer for low SNR characteristics, and embedded systems do not have the characteristics of a matrix library, we proposed using sequential Kalman filter to improve the real-time output signal to noise ratio. In the measured current for DC and AC conditions,we established an appropriate state space model Kalman filter.,and conduct simulation on matlab. Practice shows that the sequential Kalman filter algorithm can effectively improve the output signal to noise ratio and accuracy.
The Fault Analysis and On-Line Monitoring Technique for XLPE Power Cables
Authors: Duan Yu Bing , Hu Xiao Li , Yong Jun , Yang Bo , Sun Xiao Bin , Meng Hai Lei , Zhang Hao
Published: March 2015

XLPE power cable is widely used in grid system for its series of merits, but the fault become more and more frequent with increase of the use of cable and longer run time. In this paper, the reasons of the fault are introduced and the on-line monitoring technique of XLPE power cables is presented.
Impact of Residential and Public Charging Stations of Electric Vehicles on Distribution System by Stochastic Simulation
Authors: Ruayariyasub Suthida , Sirisumrannukul Sompon , Wangsatitwong Suksan
Published: March 2015

This paper investigates the impact of electric vehicles battery charging on the distribution system load if electric vehicles (EVs) are widespread used on roads. Stochastic approach based on a Monte Carlo method is developed in this study to simulate EVs charging load in two cases: 1) normal charge service at home, and 2) quick charge service at public charging stations. To demonstrate the model, a 22-kV distribution system of Pattaya City operated by Provincial Electricity Authority of Thailand (PEA) is employed in the case study. The results indicate the capability of the proposed model to exhibit the impact of EVs charging load on the local distribution system.
Numerical Simulation of the Flow and Heat Transfer of Fractal Tree-Like Minichannel Heat Exchanger
Authors: Sun Jian , Huang Zhang Feng , Zhang Ren Ping
Published: March 2015

A three-dimensional steady-state laminar flow and heat transfer model for fractal tree-like minichannel heat exchanger is developed.The fluid flow and heat transfer process is studied by CFD software. Because of its symmetric structure, only half body of the heat exchanger is calculated. The fluid-solid coupled method is applied and the hexahedral grid is used on the control volume.The temperature distribution and velocity distribution for different heat flux on top boundary surface are obtained with an inlet hydraulic diameter of 3.2mm.The simulated results show that the fractal tree-like minichannel heat exchanger has good temperature uniformity and small pressure drop.
Application of K-Means Cluster and Rough Set in Classified Real-Time Flood Forecasting
Authors: Wu Heng Qing , Huang Qiang , Xu Wei , Xi Shu Feng
Published: March 2015

A new classified real-time flood forecasting framework was presented. Firstly, the historical floods were classified by K-means cluster, according to the hydrological factors. Then rough set was used to extract operation rules for flood forecasting. Following, the conceptual hydrological model was constructed and Genetic Algorithm (GA) was used to calibrate the hydrological model parameters. In simulation, River A is taken as study example. The categories of parameters are selected in operation according to flood information and rules. The result is compared with traditional flood forecasting. It demonstrates the performance of classified framework is improved in terms of accuracy and reliability.
Study on Risk Assessment Method for Tailings Pond Disaster Based on Improved Index Weight Method
Authors: Yuan Li Wei , Li Xue Mei , Li Su Min , Chen Yu Ming
Published: March 2015

In order to evaluate the risk degree of the tailings pond’s dam-break disaster reasonably, according to statistical analysis of the tailings pond’s dam-break failure and "the tailings major hazards classification method" of our country, the improved "index weight method" is worked out, and the index partition method and weight assignment of the "index weight method" are analyzed and researched detailed. Combining with an engineering example to verify the improved "index weight method", and the sensitivity of index weight is discussed. The results of the analysis show that "index weight method" for the judgment of the risk degree of the tailings pond’ s dam-break disaster is more reasonable. It is more feasible for safety department to make division of attention to supervision level of the tailings pond according to the determination results.
Study on a Comprehensive Method for Water Ecological Index Screening
Authors: Huang Yong Gang , Hu Xiao Min , Jiang Bin Hui
Published: March 2015

The objective of this article is to apply an ecological indicator screening method, which is the Comprehensive Method for Water Ecological Index Screening (CMWEIS). CMWEIS is based on the Principal Component Analysis (PCA) and the Delphi Method (DM, a kind of expert investigation method). Not only the objective factors but also the subjective factors are considered. Using CMWEIS, the ecological indicators were sorted in the range of Liao River basin. 25 ecological indexes, 2 years’ observed data of the main stream of Liao River were considered. Ten specialists were invited to answer the designed questionnaires. After 5 times of screening, the score of each ecological index was provided and 11 indexes were selected. CMWEIS considered both the objective characters of the indicators and the subjective adjustment of the specialists. So the indexes selected by WEIDSM could reflect the ecological status well and truly. The model was programmed and all the statistical calculations were done by the computer. It could be expected that WEIDSM could give the sequence of ecological indicators quickly, so as to make ecological monitoring or evaluating more effectively.
Effects of EPS on Settlement and Dewatering Properties of Activated Sludge
Authors: Zhao Ke , Zhang Yu Ting , Zhang Yu , Yang Meng Qiao
Published: March 2015

The extracellular polymeric substances (EPS) are susceptible to microbial degradation, highly efficient, non-toxic, no secondary pollution, etc, and are considered to be the most promising biological polymers. At present, EPS have been considered by many researchers as a potential flocculent for their applications in various water, wastewater and sludge treatment process. They are insoluble organic matter adhesive to the cell surface, and they mainly derive from microbial metabolism and cell autolysis, which are mainly composed of polysaccharides, proteins, extracellular DNA. Based on illustrating content, function and structure composition of EPS, the paper reviews the action mechanism of EPS on flocculation and settlement of activated sludge and those flocculation, settlement and dewatering properties in the sewage treatment system. In addition, it summarizes the development trend and application prospect of EPS, which would provide valuable references for further research and application of EPS.
Preliminary Results of FeMnSi+Si(PLD) Alloy Degradation
Authors: Rațoi Mihaela , Dascălu Georgiana , Stanciu Teodor , Gurlui Silviu Octavian , Stanciu Sergiu , Istrate Bogdan , Cimpoesu Nicanor , Cimpoesu Ramona
Published: March 2015

In this study, nano-silicon (Si) thin films were deposited on biodegradable Fe–1.5Mn–1Si substrate by pulsed laser deposition (PLD) method. Biodegradable metallic materials represent a good solution in implantology field based on the elimination of the second surgical operation required for the extraction of the material. Also, using biodegradable materials medical complications between the metallic implant and the human body that might appear during the recovery period are excluded. In this sense we propose a metallic material based on iron with a longer degradation period compared to Mg-Ca based materials. Scanning electron microscopy (SEM) and X-ray dispersive energy analyze (EDAX) were use to analyze the implant material surface before and after Si thin film deposition and before and after implantation.
Моделирование сингулярно возмущенной спектральной задачи при помощи самосопряженных расширений операторов предельных задач
Authors: Nazarov Sergei Aleksandrovich
Published: March 2015

При помощи самосопряженных расширений дифференциальных и интегральных операторов построена асимптотическая модель спектральной задачи Стеклова, описывающей поверхностные волны на отмели. Установлены оценки погрешности моделирования и обнаружен неожиданный факт: подходящее самосопряженное расширение операторов предельных задач дает приближение к собственным числам не только в низко- и среднечастотных диапазонах спектра, но и на части высокочастотного диапазона.
Характеры подпространств Фейгина-Стояновского и теорема Бриона
Authors: Makhlin Igor Yur'evich
Published: March 2015

При помощи теоремы Бриона о выпуклых многогранниках мы даем альтернативное доказательство центральной теоремы статьи [B. Feigin, M. Jimbo, S. Loktev, T. Miwa, E. Mukhin, The Ramanujan J.,
7:3 (2003), 519-530]. Теорема представляет собой формулу для характера подпространства Фейгина-Стояновского интегрируемого представления аффинной алгебры Ли $\widehat{\mathfrak{sl}_n}(\mathbb{C})$. Наш подход состоит в том, чтобы сопоставить векторам, образующим мономиальный базис подпространства, целые точки некоторого политопа. После этого характер вычисляется при помощи теоремы Бриона.
A Dynamic Analysis of the Effects of Changes in Government Spending on Output in Nigeria
Authors: Onoja JE
Published: March 2015

This paper examined the dynamic effect of government spending on output in Nigeria using an Error Correction framework.The study seeks to investigate both the short-run and long-run (stability) effects of changes in government spending on aggregate output. The analysis will show the impetus for the inherent stabilization (or destabilization) capacity of government spending in the long-run in Nigeria
The Impact and Consequences of Corruption on the Nigerian Society and Economy
Authors: Odo LU
Published: March 2015

There is no doubt that corruption has eaten deep into the fabric of the Nigerian society. Successive governments in the country since independence in 1960 had in recognition of the evil of corruption established programmes and agencies to deal with it. These include the War Against Indiscipline and Corruption (WAIC); Independent Corrupt Practices and other Related Offences Commission (ICPC); the Economic and Financial Crimes Commission (EFCC); etc. Despite the establishment of these agencies and targeted programmes, corruption has continued to ruin every aspect of the country’s national life with serious damages to her image before the international community. Corruption has not only become pervasive in Nigeria but it is more or less a way of life, much to the detriment of the Nigerian society and economy. The paper interrogates the nature of corruption and its implications for national development efforts in Nigeria. The paper concludes that without effectively dealing with corruption in a holistic manner, there can be no meaningful socio-economic and political development of the country. This is because in the opinion of the paper, corruption is evil, which is not reformable but must be removed in its entirety.Key words: Corruption, Impact, Consequences, Society, and Economy
Ijo Art Theory: An Expose'
Authors: Mangiri SG
Published: March 2015

Nigerian traditional arts have received tremendous attention from individual researchers, writers and research institutions. These arts speak about those ethnic communities, which help to communicate and interpret their ideological framework. The traditional identity of the Ijo in her artistic culture and ideological foundation has not been documented enough by artists and critics. This paper therefore, attempts to bring to bear the philosophy, cosmogony, thoughts, beliefs, and myths of the Ijo, which forms the basis of their art style. Qualitative research methodology was used to achieve the desired objectives through photographic recording of visuals and literary studies. This will serve as a call for further research and analysis of Ijo art, for the growth and development of Nigerian arts tradition.
Gani Odutoku ’ Dialogu with Mona Lisa: Interrogating Implications of Euro-African Interface
Authors: Edewor UN
Published: March 2015

Gani Odutokun (1946-1995) was a formidable creative force at Ahmadu Bello University, Zaria where he graduated and taught painting for three decades. He died in a ghastly motor accident while returning from a group exhibition in Lagos. February 2015 marks the twentieth anniversary of this tragic loss. Amongst his celebrated paintings is the piece “Dialogue with Mona Lisa” which only now exists on page 489 of Lois Fichner-Rathus’ (2007) Understanding Art since it is alleged to have been lost during an art exhibition in the United States. This piece provides potentials for addressing imports of “cross-cultural encounter” between Europe and Africa. It also poses questions about the relevance and standards of beauty across cultural divides. Employing formalism and iconographic instruments of critical art writing the paper succinctly employs metaphoric reasoning to interrogate technical processes of additive and subtractive methods of art making as underlying elements for gaining interpretative insights. The paper concludes affirmatively that while detrimental imbalances exists in the interface that Africa and Europe shares, African nationalist efforts must combine concepts of Negritude and Tigritude to reinvent a new African consciousness that rises beyond the ashes of past debilitating conditions.Key words- Euro-African Interface, Negritude, Tigritude, Implication, Pan-Africanism
Boko Haram Insurgency in Nigeria: A Nation-State in Search of Cohesion for National Development
Authors: Obamwonyi SE , Owenvbiugie RO
Published: March 2015

For any nation to attain development in all aspects of its life there is need for it to have cohesion, which is a state of unity and orderliness. The absence of cohesion especially in the face of insurgency and insecurity spells doom. Hence this paper attempts to state the need why Nigeria, in the present state of the nation’s insecurity occasioned by the Boko Haram terrorist group, should be cohesive so that it can fight the insurgency. All the segments of the nation – military, regions, governments states and federal), the religious groups – need to unite to be able to fight the insurgency in order to enable the country attain national development. The historical and content analysis method was used in the paper. The paper reveals that in spite of the state of emergency declared in the three states of Adamawa, Borno, and Yobe, the government does not seem to be on top of the situation; and the armed forces are being blamed for not demonstrating enough professionalism in handling the war against the insurgency. The paper further reveals that both the former president and the present president are not in good term; and the military services are up arms against the minister of finance for non-release of funds. The paper recommends, amongst others, that the morale of the military should be kept high, all citizens should be security conscious at all times, while more budgetary allocations be given to the military to enable it fight the insurgency.Key words: Boko Haram, cohesion, insurgency, Nigeria, Yusuf Mohammed
Broad Ligament Pregnancy: Lessons Learnt
Authors: LNU Rukshana , Agarwal Preet , Viswanath Usha , Natarajan MS
Published: March 2015

Abdominal pregnancy is a rare obstetric condition seen by the obstetricians. Its diagnosis is usually difficult and management is a matter of debate. A 39-year-old multigravida with 20 weeks gestation complicated by pregnancy-induced hypertension, diabetes mellitus and anemia with previous cesarean section was admitted. She was not aware of her pregnancy earlier and she desired termination of pregnancy. But, termination of pregnancy failed inspite of using all possible methods of inducing labor. Diagnosis of abdominal pregnancy was made on by transvaginal ultrasound and proceeded with laparotomy. Left broad ligament pregnancy was found and the sac with fetus extracted. However, due to uncontrollable bleeding from broad ligament during placenta separation and hysterectomy was proceeded in this lady. We present our experience with the diagnosis and management of this rare case.

How to cite this article

Agarwal P, Viswanath U, Rukshana, Natarajan MS. Broad Ligament Pregnancy: Lessons Learnt. J South Asian Feder Obst Gynae 2014;6(3):178-179.