bluuebunny/crossref_metadata_2025 huggingface dataset:
Economic Impacts of Total Water Use Control in the Heihe River Basin in Northwestern China—An Integrated CGE-BEM Modeling Approach
Authors: Li Na , Wang Xiaojun , Shi Minjun , Yang Hong
Published: March 2015

This paper develops an integrated modeling approach combined with a top-down dynamic computable general equilibrium (CGE) model and a bottom-up bio-economic model (BEM) to study the economic impact of a total water use control policy in the Heihe river basin, northwestern China. The integrated CGE-BEM model is regionally disaggregated with a variety of crops and livestock, and includes the responses of farmers and consequent feedback effects in the regional economic system. The results show that under the total water use control scenario, the water use structure is changed and water use efficiency is improved. The total water use control policy has limited negative impact on the regional economic growth with only a slightly lower growth rate of 13.38% compared with a growth rate of 14% by 2020 under a business as usual water use scenario. However, the total water use control policy has significant negative impacts on several sectors, especially agriculture and food processing. It is expected cropping systems will change through a replacement of water-intensive crops with water-efficient crops. Farmers’ incomes will decrease by 3.14%. In order to alleviate farmers’ income loss and deal with water use conflicts across different sectors and regions, the promotion of migration of surplus labor from agriculture to non-agricultural sectors and the improvement of water use efficiency in agriculture are needed.
Students’ emotions for achievement and technology use in synchronous hybrid graduate programmes: a control-value approach
Authors: Butz Nikolaus T. , Stupnisky Robert H. , Pekrun Reinhard
Published: March 2015

Synchronous hybrid delivery (simultaneously teaching on-campus and online students using web conferencing) is becoming more common; however, little is known about how students experience emotions in this learning environment. Based on Pekrun’s (2006) control-value theory of emotions, the dual purpose of this study was first to compare synchronous hybrid students who attend online versus on-campus in terms of control, value, emotions and perceived success and second to compare students’ degree of emotional activation in the domains of programme achievement and technology use. Survey data from 101 graduate business students revealed that online students reported significantly higher levels of technology-related anger, anxiety and helplessness. Furthermore, in comparison to their on-campus counterparts, online students more clearly separated their emotions in terms of programme achievement and technology use. Emotions related significantly to students’ perceived success for both programme achievement and technology use, and mediated the effects of control and value appraisals on perceived success.Keywords: online learning; web conferencing; distance education; graduate business education; mediational analysisCitation: Research in Learning Technology 2015, 23: 26097 - http://dx.doi.org/10.3402/rlt.v23.26097
The influence of emotions, attitudes and perceptions on learning with technology
Authors: O'Reilly Meg
Published: March 2015

Welcome to this very international issue of Research in Learning Technology in which we present research that has been undertaken in UK, Chile, Finland, Germany, Portugal and USA. The articles on the use of technology span a range of effective teaching practices, showcase strategies for successful learning and propose ideas for future mechanisms to better engage students in their educational experiences. For me, one question running through this issue is: how is technology helping us to deliver more student-centred education?(Published: 23 March 2015)Citation: Research in Learning Technology 2015, 23: 27763 - http://dx.doi.org/10.3402/rlt.v23.27763
De l’adolescence à l’exigence du haut niveau : les paradoxes du temps
Authors: Duclos Karine
Published: March 2015

L’auteure propose une réflexion sur le rapport au temps et ses bouleversements chez des adolescents engagés dans une pratique sportive intensive. Il s’agit de comprendre ce qui se joue dans la rencontre dialectique entre le nécessaire remaniement psychique identitaire et narcissique propre au travail adolescent et l’exigence du travail du musculaire imposée par la recherche de la haute performance.
Le corps des éboueurs au travail : de quel(s) extrême(s) parle-t-on ?
Authors: Le Lay Stéphane
Published: March 2015

À partir d’une observation participante de plusieurs mois dans un atelier d’éboueurs de la ville de Paris, l’article analyse les différentes formes d’engagement extrême du corps des travailleurs dans les différentes activités, avant de s’interroger, en conclusion, sur les limites actuellement rencontrées par les politiques de prévention au travail qui tentent d’inculquer un « souci de soi » insuffisamment en prise avec le réel du travail.
Results and Complications of Silicone Frontalis Sling Surgery for Ptosis
Authors: Bansal Rakesh Kumar , Sharma Surabhi
Published: March 2015

Purpose:

Frontalis suspension is the treatment of choice for severe blepharoptosis with poor levator function. Several materials are available for this purpose. Autologous fascia lata is considered best among naturally occurring materials; however, it may not be possible to harvest fascia lata in young children. Among various synthetic materials, silicone has been used frequently and has given good results.

Methods:

This is a retrospective analysis of patients operated on from September 2008 to August 2013. All of these patients underwent silicone rod frontalis suspension for severe blepharoptosis with poor levator function and completed a minimum of 6 months of follow-up.

Results:

There were 38 eyes of 25 patients with ages ranging from 3 to 21 years (average: 10.68 ± 6.26 years). Of these 25 patients, 10 had blepharophimosis syndrome, 10 had congenital ptosis, 3 had third nerve palsy, 1 had double elevator palsy, and 1 had post-levator resection. Good cosmetic correction was achieved in 34 eyes (89.4%) after a mean follow-up of 18 months (range: 6 to 60 months). Complications observed included significant eyelid lag and lagophthalmos (5 eyes), undercorrection (4 eyes), suture granuloma (3 eyes), sling exposure at forehead incision (3 eyes), bilateral chronic eyelid edema (1 patient), and late recurrence of ptosis (1 eye).

Conclusions:

Silicone is a safe material for frontalis suspension in patients with severe ptosis; however, recurrence, granuloma formation, sling exposure, and chronic inflammation can occur with use of silicone rod.

[
J Pediatr Ophthalmol Strabismus.
2015;52(2):93–97.]
Nutritional Value of Habitat for Moose on Urban and Military Lands
Authors: Welch Joseph H. , Barboza Perry S. , Farley Sean D. , Spalinger Donald E.
Published: March 2015

Moose Alces alces are large and conspicuous animals valued for wildlife watching and hunting opportunities. However, near urban areas they can cause collisions with vehicles and damage to garden and ornamental plants. We studied a population of adult female moose that lives in and around both urban and industrial development on an active Army and Air Force base adjacent to Anchorage, Alaska, to evaluate nutrition and diet, map habitat quality, and model how habitat development affects the number of moose the landscape can support. Population density was moderate and hunter harvest was high in our study area, so we hypothesized that moose in our study area would be in similar condition to other healthy populations in Alaska. We also hypothesized that, in our study area, shrublands would support more moose than any other habitat type and that areas disturbed for urban development would be crucial to maintaining the local moose population. Rump fat depths, blood chemistries, and pregnancy rates in November and March for moose in our study area were consistent with populations in good to moderate condition. Microhistology of composite fecal samples indicated that willows Salix spp. dominated the summer diet, whereas the winter diet was divided among willows, birch Betula spp., and cottonwood Populus balsamifera. Low concentrations of available nitrogen in winter stems limited the number of moose that could be supported in our study area. Shrublands were the most valuable habitat type for moose, theoretically supporting 11–81 times more moose per hectare than any other habitat type. Shrublands were more concentrated within the developed portion of our study area than the surrounding undeveloped portions of the military base; and the access to shrublands in clearings, greenbelts, and parks sustains the productivity of this moose population despite the many disturbances of an urbanized landscape. Our habitat values can be used to model potential impacts of habitat modification on the number of moose the landscape can support.
Creativity, Social Justice and Human Rights within Adult Education
Authors: Brown Susannah
Published: March 2015

In this paper, the author describes philosophical concepts of adult learning and their application as integrated with creative problem solving within the context of social justice and human rights. The context is framed by the work of the United Nations (1992) which emphasizes importance of women's roles and creativity in the process of forming a global community. Foundational theories (Gardner, 1999; Greene, 1995; Knowles, 1975; Lawrence, 2005; & Vygotsky, 1978) are connected to support this philosophical approach to adult learning. Creative application examples are shared featuring changes in women's education and subsequently their lives such as, a project guided by artist, Vic Muniz (Walker, Jardim, Harley, & Muniz, 2010) and an arts-based education program that changed the lives of incarcerated women in one female correctional facility (Mullen, 1999). The goal of this paper is to provide examples of how creativity and arts-based learning can be integrated within adult education promoting social justice and human rights.
Knowledge Transfer and Team Performance in Distributed Organizations
Authors: Ngoma Ngoma Sylvestre , Lind Mary
Published: March 2015

The strategic significance of knowledge transfer to leverage team performance in geographically distributed organizations has been extensively studied. However, there is a dearth of scholarship about the interlacing dependencies between knowledge transfer, virtual collaboration, e-collaboration technologies and virtual team performance. This study explores the impact of virtual collaboration and e-collaboration technologies, mediated by knowledge transfer, on team performance in virtual environments. The authors report on the findings of multiple regressions and path analysis carried out on data collected from 219 key informants. The study found that virtual collaboration, e-collaboration technologies, and knowledge transfer differentially affect team performance. The authors propose a holistic framework which aligns virtual collaborative systems with business goals to advance the design and conceptualization of knowledge-based virtual teams.
It's Time There Was an App for That Too
Authors: Han Kyungsik , Shih Patrick C. , Bellotti Victoria , Carroll John M.
Published: March 2015

Timebanking refers to community-based volunteering in which participants provide and receive services in exchange for time credits. Although timebanking takes advantage of web technologies, the lack of flexibility in managing web-based timebanking transactions and the difficulty of attracting younger adults whose contributions would be highly valuable to the community still remain as major challenges. The authors' design research attempts to address these issues by leveraging the unique affordances of smartphones and their attractiveness to young adults. In this paper, the authors introduce a timebanking smartphone application and present a 5-week user study with 32 young adults. The results highlight the potential of timebanking for young population with an application that facilitates access to communications and transaction-management activities, and strengthens social connection and the sense of community attachment. The authors in particular present new affordances of smartphone technology on timebanking, including (1) transaction time reduction, (2) location and time-sensitive timebanking activity support, and (3) real-time coordination. The authors discuss design challenges and opportunities of smartphone-based timebanking.
Perishable Inventory System with Server Interruptions, Multiple Server Vacations, and N Policy
Authors: Jeganathan K. , Anbazhagan N. , Vigneshwaran B.
Published: March 2015

This article presents a perishable inventory system under continuous review at a service facility in which a waiting area for customers is of finite size . The authors assume that the replenishment of inventory is instantaneous. The items of inventory have exponential life times. It is assumed that demand for the commodity is of unit size. The service starts only when the customer level reaches a prefixed level , starting from the epoch at which no customer is left behind in the system. The arrivals of customers to the service station form a Poisson process. The server goes for a vacation of an exponentially distributed duration whenever the waiting area is zero. If the server finds the customer level is less than when he returns to the system, he immediately takes another vacation. The individual customer is issued a demanded item after a random service time, which is distributed as negative exponential. The service process is subject to interruptions, which occurs according to a Poisson process. The interrupted server is repaired at an exponential rate. Also the waiting customer independently reneges the system after an exponentially distributed amount of time. The joint probability distribution of the number customers in the system and the inventory levels is obtained in steady state case. Some measures of system performance in the steady state are derived and the total expected cost is also considered. The results are illustrated with numerical examples.
Dynamic Semi-Group Model for Reliability Engineering Optimizing the Risk on RTOS
Authors: Patra Prashant Kumar , Pradhan Padma Lochan
Published: March 2015

The reliability engineering is the high utilization of system Product (i.e. Processor, Memory, File, Sh, K & Encryption key) Services, Business and Resources at minimal cost. The Real Time Operating System providing highest services at optimal cost and time. The reliability engineering provides the maximum performance, accountability, reliability, scalability, integrity and availability of processor, memory, file, Sh, Kernel and other inter dependency sub-components. The reliability engineering is the ratio of the maximum functionality of individual components to the minimal cost. RE = k ((P, M, F, K))/minimal cost. Where k is the proportionality constant. The RE is inversely proportional to the risk. The RE maximizes the throughput & decision process of business and system as well optimize the risk and down time. We have to develop the reliability engineering model & mechanism for risk optimization over a complex real time operating system for multiple business & technology. This proposed model integrate and mapping the SE, RE, SC with Product, Business & Resources in around the globe. Meanwhile Business, Engineering & Technology keep balance with product, services, operation & services as per CE. This semi-group model definitely resole our objective at high level of satisfaction. When reliability is increases with the fault tolerance increases and mean while the risk will be optimized as per business and resource requirement.
Image Encryption Based on Development of Hénon Chaotic Maps using Fractional Fourier Transform
Authors: Mursi Mona F. M. , Ahmed Hossam Eldin H. , El-Samie Fathi E. Abd , El-Aziem Ayman H. Abd
Published: March 2015

In this paper, the authors propose an image encryption scheme based on the development of a Hénon chaotic map using fractional Fourier transform (FRFT) which is introduced to satisfy the necessity of high secure image. This proposed algorithm combines the main advantages of confusion and diffusion with (FRFT), it use Arnold Cat map for confusion and Hénon chaotic map or one of the proposed Hénon chaotic maps for diffusion. The proposed algorithm is compared with some image encryption algorithms based on Arnold Cat map, Baker chaotic map, Hénon chaotic map and RC6. The authors perform a comparison between them in several experimental tests as statistical analyses, processing time and security analysis. The authors find from these comparison tests that the proposed algorithm demonstrates good result even better than RC6 and other chaotic maps in some cases.
Applying Information Science Lens for Advancing Critical Research on IT Adoption
Authors: Potnis Devendra Dilip
Published: March 2015

Critical research on IT adoption dominated by cognitive models grounded in psychology and communication is always in search of new theoretical perspectives to understand, explain, and interpret social issues. Since information plays an important role in IT adoption, this study applies an information science lens to investigate the factors affecting the continued usage of mobile phones in rural India. Analysis of interviews with 22 women earning less than a dollar day reveals the influence of social, economic, cognitive, technological, and information-related factors on their continued usage of mobiles. Micro- and meso-level socioeconomic motives and active information-seeking behavior emerge as the most significant factors encouraging respondents to continue using mobiles against several technical and human barriers. The application of information science lens yields three constructs and ten micro-, meso-, and macro-level variables, advancing critical research on IT adoption with the help of a theoretical lens outside of psychology and communication literature.
Nonlinear Behavior Analysis of a Flapping-Wing Mechanism with Clearance Joint
Authors: Wang X.P. , Liu G.
Published: March 2015

The nonlinear behavior of a flapping-wing mechanism affected by revolute joint clearance is studied in this work. Considering the axial dimension of bearing, energy dissipation and the nonlinear power exponent from material, the nonlinear stiffness coefficient and an improved contact dynamic model in the joint clearance is established. A flapping-wing mechanism dynamic model with joint clearance is also established. Then embed the contact dynamic model and system dynamic model into the mechanical system simulation software package. From large numbers simulations performed, and the analysis of journal trajectories and Poincare maps under the different clearance sizes, it can be concluded that flapping-wing mechanism with joint clearance exhibit a chaotic response, and the more clearance size, the more obvious chaotic behavior.
Design and Optimization of Clutch Hydraulic Shift Control System in Automatic Transmissions with Failure Protection Function
Authors: Tang S.H. , Liu Yan Fang , Han Xiao
Published: March 2015

As a significant control component of vehicles, automatic transmissions should have failure protection function. The failure protection function partly is determined by the hydraulic control system. However traditional design could not cover all of failures, and there is no general design method. A design method is proposed for designing the shift control oil circuit of the hydraulic control system with the failure protection function. . The design method is applied to optimize the hydraulic control system of a six-speed automatic transmission. The function of the optimized hydraulic control system is confirmed by the dynamic simulation. The results show that the design method can simplify the hydraulic control system without losing any original functions. The proposed design method is proved to be suitable for all kinds of hydraulic control systems of automatic transmissions.
Analysis on Shear Stress Design Index of Long-Life Asphalt Pavement under Complex Traffic Conditions
Authors: Qiao Y.J. , Ma X.R.
Published: March 2015

Overloading, horizontal load effect and soft ground are the main factors that influence the formation of shear rutting of asphalt pavement. Based on the analysis on the mechanical features of Long-life asphalt pavement with flexible base, this thesis puts forward asphalt pavement’s shear stress design index under the condition of shear fatigue damage and one-off shear damage of asphalt pavement, and provides their calculating method , and gives cases analysis.
Research on Integrated Control and Simulation of Three-Phase Voltage Source PWM Rectifier Based on 64-bit RTW
Authors: Shi S.S. , Zhang Z.W. , Shu Liu , Yin T.Y. , Li Y.
Published: March 2015

This article presents a double closed loop control system for three-phase voltage source
PWM rectifier based on a real-time workshop(RTW), introduces the debugging method of 64-bit
RTW platform. Then the simulation model is converted into the real-time code, and downloaded to
the platform controlled of DSP TMS320F2812 to verify the feasibility. The experimental results
agrees the simulation results. This method greatly reduces the project development cycle and cost.
B/S Structure-Based Remote Management System in CNC
Authors: Yan L.L. , Chen Y.R. , Ren W.J. , Yu Yuan
Published: March 2015

A multi-user remote transmission of CNC machining management system was developed based on B/S structure, which combines network management model with CNC machining technologies and replaces the traditional file-copy format. This system not only provides convenience for users to use CNC equipment but also greatly improves efficiency and safety. In this project, a JSP (Java Server Pages) dynamic web site was developed in the MyEclipse environment, which can carry out many functions, including management of users’ information and documents taking advantage of database technology, transmitting and operating NC code and source files which CAD/CAM software generated. This is an attempt of centralized CAD/CAM network manufacturing.
Research and Simulation on Repairable Device Preventive Maintenance Control Policy
Authors: Su H.S. , Li J.D.
Published: March 2015

In consideration of the situation that the conventional preventive maintenance inspection cycle of the repairable device is not be changed as long as it is determined, based on continuous-time Markov processes, the repairable device preventive maintenance control strategy is studied. The preventive maintenance model is established, i.e., its state transition diagram, steady state value of the model is calculated, the control policy of device’s check rates based on device status is proposed, and the proposed control policy is simulated and confirmed using MATLAB. Simulation results show that under the proposed control policy rule, the actual operation curve of the system can well track the desired operation curve of the system, and finally can achieve the desired steady state value. Studies have shown that the method has some help to strengthen device maintenance management, improve device maintenance strategies, ensure that the device is repaired according to the state, and reduce maintenance costs of the device.
The Multi-Scenario Semiconductor Lighting Control of Driver Refactoring
Authors: Li Jun Shi , Xiong Feng , Qu Guo Qing
Published: March 2015

In view of the inefficiency and the poor flexibility of the recent intelligent lighting control system, this paper proposes a new control method starting from sensor, controller and LED driver circuit, meanwhile connecting with the Internet of things technologies. The most striking feature of this control is that it is refactored in the aspect of the whole system, which can reach the purposes of scene control, timing control, multi-zone control and remote control, etc. This paper also elaborates the hardware circuit design and the working principle of the control system and the method to realize the remote control. The system can operate simply, control efficiently, transmit reliably, manage easily.
Design and Optimization of Microstrip Stub Bandstop Filter Based on ADS
Authors: Zhu Qi Yuan , Meng Xiang Li
Published: March 2015

Microstrip filter has extensive application in microwave circuit and communication system in the future. We take lumped components low-pass filter as the prototype and employ the Richards transformation and the Kuroda rule to change the low pass prototype into a bandstop filter. By using ADS (Advanced Design System) method we design a microstrip stub bandstop filter, whose center frequency, range of frequency and relative width are respectively 4GHz, 3GHz ~ 5GHz and 8%. And then we further optimize the parameters to get the circuit design layout. It is shown that all indexes reach the design requirements and the method possesses the features such as short period and high reliability.
The Real-Time Control Technology of the Bidirectional Charger Based on the RTW
Authors: Wang X.L. , Chen J.T. , Liang J.X. , Yin T.Y. , Li Y.
Published: March 2015

With the rapid development of smart grid and green energy technologies, Bidirectional charger is paid more and more attention.This paper mainly studies the voltage stability of Bidirectional charger in the process of charging and the grid current waveform distortion rate of the discharge process. Put forward a control method based on RTW matlab/simulink. Build the simulink model and control model in the simulink environment.Then the code will be burned into the DSP processor complied from control model to the corresponding simulink model which achieved the desired effect.This method can guarantee the stability the current and voltage in the two pattern of the constant current source and the constant voltage source.In the process of discharge,the Grid-connected total harmonic current distortion rate less than 5%,the power factor is basic to 1.The simulation results and hardware platform experiment of DSP2812 all proved that this method is effective.
Critical Clearing Time Associate with Relation of Power Load Factor and Frequency in Transient Stability
Authors: Lin Ming Jong
Published: March 2015

Critical clearing time is to determine the time point of the collapse of the power system when the power system occur transient stability by a huge of failure. So that the one is an important data on protection system in power system. Therefore as an electrical engineer must to look on mostly the point of one to analyze and design in the power. In this paper, through the protection relay and breaker analysis of operation to know the team of protection relay how to complete the automatic monitoring and isolated the fault-equipment in power system. To study and analyze the swing equation and equal area criterion, we found out the relation of critical clearing time is changed with power factor and frequency. The critical clearing time was verified a non-constant value which is changed with the power factor and; if the load power factor is high, the critical clearing time is high but the frequency is high, the critical clearing time is low with system swing in the transient stability. This paper will be verify below each paragraph.
Analysis on Current Technical Status and Development of Tumbler Screening Machines in China and Abroad
Authors: Duan X.H. , Zhang C.H.
Published: March 2015

A multi-faceted introduction on current state and development trends of tumbler screening technology was proposed, which included that the origin and development of the tumbler screening machines, a comparison between tumbler screening machines and rotary vibration screens, the structure design and analysis, especially the screen mesh cleaning technology and specific machine applications. The status and development trends of tumbler screening machines in China and abroad especially in German were analyzed. The developing direction of future tumbler screening machines and the situation of Chinese businesses producing tumbler screening machines development were introduced.
Design of Permanent Magnet Synchronous Motor Drive Circuit Based on IPM
Authors: Lin X.L. , Dong D.F. , Zhou Wei Hu
Published: March 2015

High performance servo system is the basis of fast tracking and precision measurement of laser tracker, and drive circuit is the hardware guarantee of the control algorithm in the system. This paper is concerned with the designed drive circuit of Permanent Magnet Synchronous Motor (PMSM). First, control system model of PMSM is introduced, as well as the PM10CSJ060 Intelligent Power Module (IPM) working principle. Then the drive circuit based on IPM is designed and applied in servo system. Experimental results show that the drive circuit is reliable and stable, with strong anti-interference function, can meet the performance requirements of laser trackers.
Design and Implementation of Data Acquisition System Based on ADXRS649 Gyroscope
Authors: Sun Shou Mei , Wang Jing Hui , Liu J.
Published: March 2015

The paper presents a data acquisition system, which uses a high resolution AD and low noise operational amplifier with ADXRS649 gyroscope.The design has realized the reliable read the gyroscope data, and motion detection system using interrupt function, reducing system power consumption, has very high practical value.
Another Note on Stability of Sliding Mode Dynamics in Suppression of Fractional Chaotic Systems
Authors: Yuan J. , Shi B. , Wang Yan
Published: March 2015

This paper revisits the stability analysis of sliding mode dynamics in suppression of a classof fractional chaotic systems by a different approach. Firstly, we convert fractional differential equationsinto infinite dimensional ordinary differential equations based on the continuous frequency distributedmodel of the fractional integrator. Then we choose a Lyapunov function candidate to proposethe stability analysis. The result applies to both the commensurate fractional systems and the incommensurateones.
Comments on “A Novel Image Encryption-Compression Scheme Using Hyper-Chaos and Chinese Remainder Theorem”
Authors: Bai Sen , Zhu Gui Bin , Ji Xiao Yong
Published: March 2015

In a recent paper by Zhu and Zhao [1], an image encryption-compression scheme (IECS) based on hyper-chaos and Chinese remainder theorem (CRT) is proposed. This comment points out that in [1] there are some errors in two important algorithms and the performance of the proposed IECS is severely overestimated. It is shown that the IECS presented in paper [1] can be easily discredited and ipso facto cannot be used for compressing the plain image with a given compression ratio. Both theoretical analysis and experimental results are given to support our conclusion.
An Improved ESPRIT Algorithm for Fast Frequency Estimation
Authors: Liu K. , Sun C.C. , Sun J.
Published: March 2015

An improved fast ESPRIT frequency estimation algorithm is present for reducing the computational load existing in frequency estimation of subspace rotational in variance technology (ESPRIT) algorithm. The improved algorithm does not need eigen-decomposition of auto-covariance matrix, using the sampling signal delay data to construct two sub-arrays with the same array shape, through generalized eigen-decomposition of the matrix pencil constructed by the two sub-arrays cross-covariance matrix, to achieve a fast frequency estimation of signal. The simulation results show that the frequency estimated performance of the improved ESPRIT algorithm is comparable to the standard ESPRIT algorithm, and its computational load can be reduced to the fifteen percent of the standard ESPRIT algorithm, so can be used in real time processing system.
A Method of Extracting Acceleration of Boost Phase Based on Orthogonal Curve Fitting
Authors: Huang Yuan , Wu Jing , Wu Li Hua , Sheng Wei Dong
Published: March 2015

Extracting acceleration of boost phase is the key technology of establishing the ballistic profiles. An algorithm based on orthogonal curve fitting is presented to extract acceleration of boost phase, using the line of sight (LOS) measurements. Then, an error model is established and the theoretical error of the method is analyzed. The new fitting method improves the curve fitting error of the terminals. Sufficient simulations on some typical scenarios are performed, and the results indicate that the method presented is efficient.
The STAP Method for Moving Sonar Reverberation Suppression
Authors: Zhao S.D. , Yan Kun , Zhou T.Z.
Published: March 2015

The theory of full dimension and reduced dimension STAP was introduced. Based on the physical mechanism of reverberation formation, the suppression of moving sonar reverberation and the possibility of improvement of detection performance were analyzed and discussed, and the solutions of several key steps were given. The analysis shows that reverberation suppression using STAP is more difficult than clutter suppression of AEW, but its implementation is possible. The results of simulation show that the STAP method can achieve better detection performance than conventional method. The STAP method can utilize the space-time characteristic of moving sonar reverberation sufficiently, and so is a promising new method of reverberation suppression.
A Particle Filter Algorithm Based on Mixing of Prior Probability Density and UKF as Generate Importance Function
Authors: Lu Liu , Wang J. , Yang M. , Geng S.
Published: March 2015

As an important nonlinear filter theory, particle filter is a heated issue in domestic and foreign researches. The option of importance density is one of the key steps of particle filter algorithm. The proper option of importance density can minish the negative influence of filter algorithm caused by degeneracy problem. This paper introduces several widely-used options of importance density systemically, and analyzes their features and applied perspectives respectively. The paper also advances a comprehensive method of importance density, analyzes its technical features, explores the adjudgement and improvement of this method based on various performance, and finally puts forward the necessary further study according to the engineer requirements.
Analysis of the Interrelationship between Trip Chain Pattern and Trip Mode Choice Based on Multinomial Logistic Model
Authors: Yang S. , Deng Wei , Wu D.X. , Gong W.
Published: March 2015

This paper explores the interrelationship between trip chain pattern and trip mode choice based on multinomial logistic model, using 2010 Nanjing resident trip survey data. Unlike previous literatures, trip mode choice is divided into single-mode and multi-modes in this study. Estimation coefficients verify trip chain pattern and trip mode selection are a pair of choices that influence each other. Trip mode is great positively associated with trip chain pattern of HW+WH, HO+OH, HW+OH, however, in return trip chain pattern is the most significant negative factor that affects trip mode choice, which means that no trip chain pattern would provoke travelers to select multi-modes. Despite the results seem to reach a contradiction between trip chain pattern and trip mode choice, still two facets of views try to explain the phenomenon, in addition, discussion on the interrelationship between complex trip chain pattern and multi-modes which might put forward more challenges to urban planning is also proposed as well in the paper.
2-D DOA Estimation of Quasi-Stationary Signals via Tensor Modeling
Authors: Hu Jie , Li Wei , Chen Yong Jue
Published: March 2015

A two-dimensional direction-of-arrival estimation of quasi-stationary signals via tensor modeling using an L-shape array is presented in this paper. This is a novel approach which is an extension of Khatri-Rao subspace approach, denoted by extended Khatri-Rao subspace approach. The proposed approach can work even when number of sensors is less than number of sources. To utilize the multilinear algebra, direction of arrival (DOA) is developed in the multidimensional sense. The effectiveness of the proposed method is verified through numerical examples.
Passing Ability Evaluation and Impact Factors Analysis of Articulated Vehicle with 6×4 Tractor
Authors: Zhang H.W. , Zhang H. , Yang J.Q.
Published: March 2015

Passing Ability of articulated vehicles is tested and analyzed, which are combined of different 6×4 tractors and different loaded semitrailers. Test methods and test procedure is designed and developed. 90 times of test data are collected in ‘3rd Swap Trailer Transport Recommended Vehicles Test’. Articulated vehicles are combined of 25 different 6×4 tractors and 21 different loaded semitrailers. Test data are statistically analyzed and passing ability is evaluated according to the requirements of GB 1589-2004. Linear regression is used to study how tractor front overhang, distance between center of tractor fifth wheel and tractor first axle and semitrailer first wheel space impact passing ability. The results can serve as both advices in improving articulated vehicle and data references in developing and amending standards.
A Sound Localization Algorithm Based on Helmet-Mounted Microphone Array Using the High-Frequency Intensity Difference
Authors: Zhang Yi , Shen B.B.
Published: March 2015

The common localization algorithms of microphone array is based on linear array or circle array which is unblocked (there is no block between sound source and microphone). This paper we research the sound localization algorithm based on helmet-mounted microphone array which is a kind of blocked array. This paper takes the attenuation of high-frequency by helmet into account, and utilizes intensity decay of different backward microphones to construct localization algorithm. Experimental results show that the localization method of the high-frequency sound signal based on the direct path improves the accuracy of localization compared with common algorithm based on unblocked microphone array.
Fatigue Damage of a Cutter Used for Cutting Cashew Nut under Random Load
Authors: Fu Y.F. , Gong J. , Zhu D.M. , Liu Y.J. , Huang Hui , Huang Mao Fang
Published: March 2015

To study the fatigue damage of a cutter used for cutting cashew nut, the integrated
simulation platform is established with Hypermesh, LS-Dyna, LS-PrePost, and nCode GlyphWorks.
The simulation model is established by Hypermesh. LS-Dyna is used to calculate the k file.
LS-PrePost is used as the post-processing software. The rain-flow counting, load superposition and
extrapolation are executed using Rainflow module in nCode GlyphWorks. The analysis of the
fatigue damage of the cutter is executed using Stress Life module in nCode GlyphWorks. The
equivalent stress time history of different elements in the upper and lower cutters, rain-flow
counting histogram after load spectrum superposition, rain-flow counting histograms after load
spectrum extrapolation, and damage histogram of the cutter are obtained. The results show that the
cutter has excellent mechanical properties, and the minimum fatigue life of the cutter is about 495
days, which is a conservative solution.
Hidden System APIs Based Code Obfuscation
Authors: Xiang Fei , Liu Fen Lin , Lu Bin , Gong Dao Fu
Published: March 2015

For the problem that static disassembly can expose system API calls in programs, this paper proposes a kind of code obfuscation aimed at hiding system API calls from reverse analysis. The algorithm is implemented by creating a system API address table and constructing secret index variables. During execution, the program looks up the table for the correct API to call, thus keeping the semantic unchanged. Analysis and experiments show that the algorithm can effectively protect system API calls from static reverse analysis.
Design Patent Retrieval Based on Gabor Wavelet and LBP
Authors: Li Q.Q. , Zhou C.S. , Lv X.Q. , Yang H.Y. , Zhang K.
Published: March 2015

Due to the diversity and complexity of design patent images, it is difficult to retrieve well if extracting features from images directly. A design patent image retrieval method based on Gabor filter and LBP is proposed in the paper. Firstly, doing low-pass filtering to the normalized images with Gabor filter to amplify the images’ details, then extracting image’s texture feature with LBP algorithm, calculating images’ similarity according to the distance formula after feature vectors’ internal normalization, finally return several similar images. The experimental results show that this retrieval method get better retrieval accuracy and correct rate.
A Novel QoS Bandwidth Prediction Method for Power Distribution and Utilization Grid
Authors: Liu Xiang Jun , Zhang Chuang , Liu Zhen Yu , Lu Jun
Published: March 2015

According to the complexity of communication bandwidth prediction that brought by the increased services in the distribution and utilization of Smart Grid, a method based on M/M/1/k queuing model is proposed to predict the communication bandwidth for the Smart Grid. A queuing model to predict the communication bandwidth is built by analyzing the QoS requirements in related power services as well as the characteristics of the traditional elastic coefficient method.Then a calculation method is proposed to predict the communication bandwidth based on the queuing at the communication access point of service section.
Design and Realization of Virtual Campus on Mobile Platform
Authors: Zheng Rui , Zhang Dan , Yang G.S.
Published: March 2015

In this paper, we introduce a virtual campus on mobile platform in service recently. The system has several functions: exhibiting the environment of the campus, inquiring available information and interactive learning and so on. The procedure of realization has three parts: construction modeling, driving character model and interaction design. For construction modeling, we applied the prevailing 3D modeling software 3DMax to complete the task. Third-person perspective was adopted in driving character model and the script with the development platform-Unity3D works well after revising and it is more suitable for mobile platform. In terms of interaction design, we borrowed the method of role play game (RPG): time related events were combining with the buildings and we design some attributes for the roaming character, and the events could be triggered according to specified logically and temporal order. The interaction could lead the users to explore the virtual campus with interest, and thereby the aim of familiarizing the freshman students with basic workflow of the campus life quickly can be achieved. As the whole system is designed for mobile platform, it is convenient for using anywhere or anytime, the application effect therefore is better comparing with the traditional method of running a virtual campus on personal computer.
Knowledge Management for Emergence
Authors: Bai H.T. , Zhu J. , Chen W. , Chen H.
Published: March 2015

As the emergence phenomenon reflects the process of knowledge creation. Knowledge Management (KM) technology is naturally taken into account. The characteristic of emergence has brought new requirements for implementing KM. After they have been sufficiently analyzed, a knowledge resource management method based on ontology cloud model is put forward. The method is a set of scientific and effective management solution, which consists of expressing knowledge from emergence, defining knowledge evolution process, and sharing knowledge to promote emergence. This method is a good thought for making use of emergence and good for innovation.
Conception of Traditional Knowledge Database Based on Climate Change
Authors: Du Yu Huan , Wang Cheng , Yin Lun , Xue Da Yuan , Caiji Zhuo Ma
Published: March 2015

Recent years, the studies on global climate change, local traditional knowledge (TK) – especially traditional ecological knowledge (TEK) have attracted a lot of attention. Local traditional knowledge can reflect the ethnic groups’ specific understandings of climate change and its impact. However, studies on the relationship between traditional knowledge and climate change have not achieved such significant result thus far. This paper examines the perspectives, knowledge, and classification of climate change based on local Tibetan traditional knowledge in Deqin County of Yunnan, China. It analyses the local actions how to “cope with” climate change, and further discusses the relationship between traditional knowledge and ecological environment. The suggestion to establish the database of climate change, then, there will be a new system if the database can be connected with TK database. From the new system, we can analyze and choose the appropriate farming practices and “climate-ready” crops to respond to different predicted weather.
Structure Strength and Stability Analysis on the Truss under the Operation of Lifting
Authors: Zhao Z.M.
Published: March 2015

The truss is widely used as a loaded platform in many fields and industry. The structure strength and stability analysis on the truss is researched under the operation of lifting in the paper. Firstly, the additional water gravity load is considered and calculated, which cannot be pushed out of rods during the process of lifting up from deep sea. Then the finite element model based on ANSYS/WORKBENCH software platform for the truss is created, and the boundary conditions and payloads are set into the model. Lastly, the structure strength is checked and the stability analysis is proved based on the FEM method. The results in the paper verify effectively that the strength and stability of truss under the lifting operation meet material and structure performance requirements, thus the research in the paper is of significant reference on the safe service and engineering application for truss.
Prediction of Top-Coal Caving and Drawing Characteristics Using Artificial Neural Networks in Extremely Thick Coal Seam
Authors: Yu J.H. , Mao De Bing
Published: March 2015

Based on the feature of large thickness and poor drawing characteristics in extremely thick coal seam top-coal caving method, combined with numerous practical examples analyses, the primarily six factors influence the drawing characteristics were found out which are mining depth, coal seam strength, joint crack development, parting thickness in top-coal, caving ratios, immediate roof filling coefficient. According to 45 typical top-coal caving in extremely thick coal seam samples, the prediction of top-coal caving and drawing characteristics based on artificial neural networks was established and training samples and testing samples was determined. Use SPSS statistical software training the network model. Then select No. 9 coal seam first mining area of Tiaohu mine as the application case. The drawing property was forecast according to the established network model. Application results show that the use of artificial neural networks for top-coal caving and drawing characteristic prediction is effective and feasible.
Reliability Analysis for AFDX Network Based on Dynamic Fault Tree
Authors: Sun Li Na , Huang Ning , Zhao Zheng
Published: March 2015

As the basis for comprehensive integration of the aircraft, AFDX network has been widely used in avionics network. AFDX’s reliability analysis and verification is particularly important according to the requirements of airworthiness. The transmission process, components and functional contact between components of AFDX network is analyzed in this paper. Dynamic fault tree (DFT) is used to model AFDX network reliability according to network fault characteristics. This analysis process has two contributions for network reliability analysis. Firstly, the analysis of AFDX network failures is implemented to device-level, which is facilitated to quantitative calculations in engineering. Secondly, end system and switch system, the core subsystem in transmission of AFDX, are analyzed and modeled, besides fault of redundant network.