bluuebunny/crossref_metadata_2025 huggingface dataset:
The Optimization Based Dynamic and Cyclic Working Strategies for Rechargeable Wireless Sensor Networks with Multiple Base Stations and Wireless Energy Transfer Devices
Authors: Ding Xu , Han Jianghong , Shi Lei
Published: March 2015

In this paper, the optimal working schemes for wireless sensor networks with multiple base stations and wireless energy transfer devices are proposed. The wireless energy transfer devices also work as data gatherers while charging sensor nodes. The wireless sensor network is firstly divided into sub networks according to the concept of Voronoi diagram. Then, the entire energy replenishing procedure is split into the pre-normal and normal energy replenishing stages. With the objective of maximizing the sojourn time ratio of the wireless energy transfer device, a continuous time optimization problem for the normal energy replenishing cycle is formed according to constraints with which sensor nodes and wireless energy transfer devices should comply. Later on, the continuous time optimization problem is reshaped into a discrete multi-phased optimization problem, which yields the identical optimality. After linearizing it, we obtain a linear programming problem that can be solved efficiently. The working strategies of both sensor nodes and wireless energy transfer devices in the pre-normal replenishing stage are also discussed in this paper. The intensive simulations exhibit the dynamic and cyclic working schemes for the entire energy replenishing procedure. Additionally, a way of eliminating “bottleneck” sensor nodes is also developed in this paper.
Label-Free, Single Molecule Resonant Cavity Detection: A Double-Blind Experimental Study
Authors: Chistiakova Maria , Shi Ce , Armani Andrea
Published: March 2015

Optical resonant cavity sensors are gaining increasing interest as a potential diagnostic method for a range of applications, including medical prognostics and environmental monitoring. However, the majority of detection demonstrations to date have involved identifying a “known” analyte, and the more rigorous double-blind experiment, in which the experimenter must identify unknown solutions, has yet to be performed. This scenario is more representative of a real-world situation. Therefore, before these devices can truly transition, it is necessary to demonstrate this level of robustness. By combining a recently developed surface chemistry with integrated silica optical sensors, we have performed a double-blind experiment to identify four unknown solutions. The four unknown solutions represented a subset or complete set of four known solutions; as such, there were 256 possible combinations. Based on the single molecule detection signal, we correctly identified all solutions. In addition, as part of this work, we developed noise reduction algorithms.
Improved Local Ternary Patterns for Automatic Target Recognition in Infrared Imagery
Authors: Wu Xiaosheng , Sun Junding , Fan Guoliang , Wang Zhiheng
Published: March 2015

This paper presents an improved local ternary pattern (LTP) for automatic target recognition (ATR) in infrared imagery. Firstly, a robust LTP (RLTP) scheme is proposed to overcome the limitation of the original LTP for achieving the invariance with respect to the illumination transformation. Then, a soft concave-convex partition (SCCP) is introduced to add some flexibility to the original concave-convex partition (CCP) scheme. Referring to the orthogonal combination of local binary patterns (OC_LBP), the orthogonal combination of LTP (OC_LTP) is adopted to reduce the dimensionality of the LTP histogram. Further, a novel operator, called the soft concave-convex orthogonal combination of robust LTP (SCC_OC_RLTP), is proposed by combing RLTP, SCCP and OC_LTP. Finally, the new operator is used for ATR along with a blocking schedule to improve its discriminability and a feature selection technique to enhance its efficiency. Experimental results on infrared imagery show that the proposed features can achieve competitive ATR results compared with the state-of-the-art methods.
Isolation and Preliminary Characterization of Proteinaceous Toxins with Insecticidal and Antibacterial Activities from Black Widow Spider (L. tredecimguttatus) Eggs
Authors: Lei Qian , Yu Hai , Peng Xiaozhen , Yan Shuai , Wang Jirong , Yan Yizhong , Wang Xianchun
Published: March 2015

The eggs of black widow spider (L. tredecimguttatus) have been demonstrated to be rich in toxic proteinaceous components. The study on such active components is of theoretical and practical importance. In the present work, using a combination of multiple biochemical and biological strategies, we isolated and characterized the proteinaceous components from the aqueous extract of the black widow spider eggs. After gel filtration of the egg extract, the resulting main protein and peptide peaks were further fractionated by ion exchange chromatography and reversed-phase high performance liquid chromatography. Two proteinaceous components, named latroeggtoxin-III and latroeggtoxin-IV, respectively, were purified to homogeneity. Latroeggtoxin-III was demonstrated to have a molecular weight of about 36 kDa. Activity analysis indicated that latroeggtoxin-III exhibited neurotoxicity against cockroaches but had no obvious effect on mice, suggesting that it is an insect-specific toxin. Latroeggtoxin-IV, with a molecular weight of 3.6 kDa, was shown to be a broad-spectrum antibacterial peptide, showing inhibitory activity against all five species of bacteria tested, with the highest activity against Staphylococcus aureus. Finally, the implications of the proteinaceous toxins in egg protection and their potential applications were analyzed and discussed.
Human Endogenous Retrovirus Group E and Its Involvement in Diseases
Authors: Le Dantec Christelle , Vallet Sophie , Brooks Wesley , Renaudineau Yves
Published: March 2015

Human endogenous retrovirus group E (HERV-E) elements are stably integrated into the human genome, transmitted vertically in a Mendelian manner, and are endowed with transcriptional activity as alternative promoters or enhancers. Such effects are under the control of the proviral long terminal repeats (LTR) that are organized into three HERV-E phylogenetic subgroups, namely LTR2, LTR2B, and LTR2C. Moreover, HERV-E expression is tissue-specific, and silenced by epigenetic constraints that may be disrupted in cancer, autoimmunity, and human placentation. Interest in HERV-E with regard to these conditions has been stimulated further by concerns regarding the capacity of HERV-E elements to modify the expression of neighboring genes and/or to produce retroviral proteins, including immunosuppressive env peptides, which in turn may induce (auto)-antibody (Ab) production. Finally, better understanding of HERV-E elements may have clinical applications for prevention, diagnosis, prognosis, and therapy.
Genetic Gain from Phenotypic and Genomic Selection for Quantitative Resistance to Stem Rust of Wheat
Authors: Rutkoski J. , Singh R.P. , Huerta‐Espino J. , Bhavani S. , Poland J. , Jannink J.L. , Sorrells M.E.
Published: March 2015

Stem rust of wheat (Triticum aestivum L.) caused by Puccinia graminis f. sp. tritici Eriks. and E. Henn. is a globally important disease that can cause severe yield loss. Breeding for quantitative stem rust resistance (QSRR) is important for developing cultivars with durable resistance. Genomic selection (GS) could increase rates of genetic gain for quantitative traits, but few experiments comparing GS and phenotypic selection (PS) have been conducted. Our objectives were to (i) compare realized gain from GS based on markers only with that of PS for QSRR in spring wheat using equal selection intensities; (ii) determine if gains agree with theoretical expectations; and (iii) compare the impact of GS and PS on inbreeding, genetic variance, and correlated response for pseudo‐black chaff (PBC), a correlated trait. Over 2 yr, two cycles of GS were performed in parallel with one cycle of PS, with each method replicated twice. For GS, markers were generated using genotyping‐by‐sequencing, the prediction model was initially trained using historical data, and the model was updated before the second GS cycle. Overall, GS and PS led to a 31 ± 11 and 42 ± 12% increase in QSRR and a 138 ± 22 and 180 ± 70% increase in PBC, respectively. Genetic gains were not significant but were in agreement with expectations. Per year, gains from GS and PS were equal, but GS led to significantly lower genetic variance. This shows that while GS and PS can lead to equal rates of short‐term gains, GS can reduce genetic variance more rapidly. Further work to develop efficient GS implementation strategies in spring wheat is warranted.
Transcriptome Profiling of Rust Resistance in Switchgrass Using RNA‐Seq Analysis
Authors: Serba Desalegn D. , Uppalapati Srinivasa Rao , Mukherjee Shreyartha , Krom Nick , Tang Yuhong , Mysore Kirankumar S. , Saha Malay C.
Published: March 2015

Switchgrass rust caused by Puccinia emaculata is a major limiting factor for switchgrass (Panicum virgatum L.) production, especially in monoculture. Natural populations of switchgrass displayed diverse reactions to P. emaculata when evaluated in an Ardmore, OK, field. To identify the differentially expressed genes during the rust infection process and the mechanisms of switchgrass rust resistance, transcriptome analysis using RNA‐Seq was conducted in two pseudo‐F1 parents (‘PV281’ and ‘NFGA472’), and three moderately resistant and three susceptible progenies selected from a three‐generation, four‐founder switchgrass population (K5 × A4) × (AP13 × VS16). On average, 23.5 million reads per sample (leaf tissue was collected at 0, 24, and 60 h post‐inoculation (hpi)) were obtained from paired‐end (2 × 100 bp) sequencing on the Illumina HiSeq2000 platform. Mapping of the RNA‐Seq reads to the switchgrass reference genome (AP13 ver. 1.1 assembly) constructed a total of 84,209 transcripts from 98,007 gene loci among all of the samples. Further analysis revealed that host defense‐related genes, including the nucleotide binding site–leucine‐rich repeat domain containing disease resistance gene analogs, play an important role in resistance to rust infection. Rust‐induced gene (RIG) transcripts inherited across generations were identified. The rust‐resistant gene transcripts can be a valuable resource for developing molecular markers for rust resistance. Furthermore, the rust‐resistant genotypes and gene transcripts identified in this study can expedite rust‐resistant cultivar development in switchgrass.
Judeus de Castela em Portugal no final da Idade Media: onomástica e fontes documentais
Authors: Ferro Tavares María José
Published: March 2015

Mediante el recurso a documentación en buena medida inédita de la cancillería real y procesos inquisitoriales, la autora realiza una lectura diacrónica de la presencia y establecimiento de judíos de origen hispánico en Portugal desde la instauración de la Casa de Avís y hasta después del bautismo forzado de 1497. En esta segunda parte se exponen ejemplos de la movilidad de los judíos llegados al reino como consecuencia de la inestabilidad social y las políticas regias.
Dos ketubbot castellanas y otro fragmento hebreo del Archivo de la Real Chancillería de Valladolid
Authors: Muñoz Solla Ricardo
Published: March 2015

Edición, descripción formal y estudio de tres fragmentos manuscritos hebreos pertenecientes a la colección de Pergaminos del Archivo de la Real Chancillería de Valladolid. Se trata, en concreto, de una hoja de un códice bíblico y dos fragmentos de ketubbot castellanas, hasta ahora inéditas, procedentes de Valencia de Don Juan (León) y Villadiego (Burgos). La existencia de estas piezas se justifica a la luz del proceso de formación y organización de la colección de Pergaminos. El autor ofrece una edición del texto hebreoarameo de las dos ketubbot, destacando su relevancia dentro del conjunto de documentos judíos de carácter matrimonial ya conocidos. Asimismo, reconstruye el contexto particular en el que una de ellas fue producida y reutilizada por sus propietarios. Todo ello puede contribuir a un mejor conocimiento de este tipo de documentos legales en el ámbito del derecho matrimonial hispano-judío medieval.
Otra versión sefardí manuscrita de El debate de los frutos y el vino
Authors: Romero Elena
Published: March 2015

En el presente artículo se edita otra versión manuscrita de la copla El debate de los frutos y el vino. Dicho texto, procedente del manuscrito Bacašot veširim ufiyutim (Oriente, quizá Turquía, ca. 1850), viene a sumarse a las dos versiones, también manuscritas de Venecia d. 1702 y Sarajevo ca. 1794, publicadas por la misma autora en su artículo «La copla sefardí de El debate de los frutos y el vino y sus ecos en la tradición oral», aparecido en Estudios sefardíes dedicados a la memoria de Iacob M. Hassán (z”l) (Madrid: CSIC, 2011), 491-524. Amén de editar y estudiar el texto, se lleva también a cabo la comparación con las dos versiones anteriores, poniendo de relieve las principales diferencias estructurales, léxicas y morfológicas, así como de cambios de formulaciones.
El amuleto de Cuenca: historia, magia y manuscritos
Authors: Gutwirth Eleazar
Published: March 2015

Reproducido frecuentemente por su atracción visual y colorido, el amuleto de Cuenca forma parte integral de un legajo de Inquisición conservado en el Archivo Diocesano de Cuenca. Se presenta aquí el testimonio inédito acerca del amuleto y se plantean también algunos de los problemas que suscita: identificación de los personajes; estado del hebraísmo hacia 1496; cuestiones de texto e imagen; conocimientos del judaísmo entre los conversos después de la expulsión; singularidad de la evidencia archivística frente a los amuletos judíos sin fecha y lugar.
El problema de las «entregas»: Prestamistas judíos en el Norte de Castilla (Belorado y Miranda de Ebro hacia 1300)
Authors: Soifer Irish Maya
Published: March 2015

Estudio de las relaciones económicas entre judíos y cristianos a comienzos del siglo xiv en el Norte de Castilla, especialmente en relación al préstamo de dinero efectuado por judíos. Tratándose de transacciones económicas entre individuos de distinta confesión religiosa, los interesados recurrían a los procedimientos establecidos en el derecho consuetudinario, y hacían uso de la negociación con el objetivo de resolver conflictos y generar el mayor consenso posible entre las distintas comunidades. A medida que los prestatarios cristianos iban incumpliendo la devolución de préstamos, tales negociaciones fracasaron debido a una combinación de factores internos y externos. En Belorado y en Miranda de Ebro, la colaboración de los oficiales reales en la colección de las deudas suscitó protestas de los concejos, que acusaban a los prestadores judíos de violar los privilegios locales y de empobrecer a los deudores. Las tensiones entre los cristianos y los judíos de estas villas fueron en aumento cuando los mecanismos de resolución de conflictos quedaron trastocados y la ejecución de los pagos de las deudas quedó sustraída al control local.
An Analytical Study of the Structural Integrity of an LPG Storage Tank under Wind Load
Authors: Park Bong Kwan , Kim Jae Min , Keum Chang Min , Kim C. , Choi Heon Oh
Published: March 2015

Since the wall thicknesses of most large LPG storage tanks are thin while their diameters are large, their structural integrity is one of the most important design factors. The tanks are mainly located near the waterfront for efficient transport and accessibility. This leads to exposure to wind loads, which should be considered in the design of the tanks. This paper describes an analytical technique for determining the structural integrity of a 45m diameter-LPG storage tank in the case of a wind load based on API 620 code. A finite element model for the tank was made using shell elements and analyzed under 50 m/s wind. The calculated maximum von-Mises stress was 103 MPa whereas the yield strength of tank’s material is 222 MPa. This result shows that the structural integrity of the tank is assured.
Influence of Side-Pressure Coefficient on Deformation of Tunnel Surrounding Rock and Bolt Axial Force
Authors: Ma Feng Hai , Wang Yan , Wang Zhi Bin
Published: March 2015

Internal force and deformation of surrounding rock and supporting structure of the nonlinear research is the use of finite element software ADINA by ideal elastic-plastic constitutive model.Results show that the lateral pressure coefficient increased from 0 to 1, and even decrease sharply arch sedimentation of surrounding rock, side wall horizontal displacement towards the hole along the radial direction development gradually reduced to 0 and reverse to the hole, when the lateral pressure coefficient is less than 0.5, bolt axial force biggest change is not obvious, when lambda increases gradually, the largest bolt axial force significantly increased.
The Strength Analysis of Pre-Tightening Force on Covering Pipe-Ear
Authors: Wang Hong Wei , Zhou Gan , Zhou Mei Juan
Published: March 2015

The covering pipe-ear is one of the important components of the overhead contact line system (OCS) for supporting loads. The finite element model of covering pipe-ear was established, as the pre-tightening force, wind load and ice load all have effect on it, the stress distribution law were simulated under 12 kinds of loading conditions. The results show that the pre-tightening force has remarkable influence on covering pipe-ear and 2500N pre-tightening force is appropriate for the aluminum alloy covering pipe-ear. It is useful for the catenary components static strength reliability design.
A Parallel Simulating System for Calculating Illumination Distribution of Plant Canopy
Authors: Xie Wen Hao
Published: March 2015

Illumination is an important factor to the growth and reproduce of plants. In the process of the plant canopy illumination distribution simulation, it is too complex and time-consuming for single-core computer because of the huge data. This paper has carried on the parallel processing for the Z-buffer sorting algorithm which used for the calculation of the plant canopy illumination distribution in order to speeding up the rate of calculation. The algorithm is transplanted to multiprocessor computers as server and controls the simulation calculation by designing the client-side on the common computers. This design has completed a simulation system based on the C-S mode. It adopts the illumination simulation for the rice in different period using this system and draws the effect picture. At last, the paper has drawn a conclusion that this algorithm is very useful to analyzing plant growth trends and simulating the change of the plant canopy illumination distribution.
The Construction of Finite Element Model of Invisible Appliance of Inhomogeneous Thickness by Reverse Engineering Technology
Authors: Yue Yan Fang , Wang Yang , Zhang Yong Di
Published: March 2015

Reverse engineering technology and Laser scanning technology was used to obtain and establish the ideal digital dental mode and dental model with invisible appliance. To complete the Boolean subtraction between the dental model with invisible appliance and the ideal dental mode by the alignment marks designed in the guml, so that got the digital model of invisible appliance. Then the finite element model was established by the finite element analysis platform ANSYS. A more precise dentition finite element model of invisible appliance is established, which can reflect the real surface geometrical morphology of invisible appliance and its inhomogeneous thickness characteristics.
The Study on Finite Element Method for Mechanism Balance Calculation
Authors: Xiong Xin , Jin Jing , Wu Xin Yue
Published: March 2015

Based on body inertial force and moment theoretical calculation method and finite element (FE) method principle, a kind of calculation method for complicated system static or dynamic inertial force and moment based on MATLAB code was put forward. The traditional mass concentration method has more error in some conditions compare with FE method. At last the data dependency was evaluated between method accuracy and element size.
The Statistical Catastrophe Theory and Optimal Probability Based Design
Authors: Pitukhin Aleksandr Vasilyevich , Skobtsov Igor
Published: March 2015

This paper deals with the statistical catastrophe theory method for the optimal design of machine components. A short introduction to the catastrophe theory is presented, the statement of optimal design problem is given in the first part of the paper. A single criterion design is presented; the reliability function is used as the objective function. The last part is focused on probability approach. Manage variables are viewed as random stationary processes, statistical linearization method and Pearson moment method are used for the reliability function evaluation.
Multi-Sensor Intelligent Monitoring of High-Speed Grinding for Brittle and Hard Materials
Authors: Ma Yin Chen , Yang Jian Guo
Published: March 2015

This paper deals with an intelligent multi-sensor monitoring system, which focus on the characteristic of transient occurrence in high speed grinding and its application to the machining of brittle and hard materials. Different sensors are used to collect workpiece vibration, acoustic emission, force and displacement signals, which are used to define the stability of grinding process and monitoring the fault in high speed machining. Although there is a lot of methods have been reported in recent literature for monitoring grinding process, they have not a systematic method which can totally reflect the characteristic of high speed grinding. On the other hand，no single sensor or feature has been shown to be successfully and precisely all grinding faults. This paper combined different feature selection including time-frequency domain or wavelet methods and sensor fusion based on clustering method to deal with the stability condition test in high-speed grinding. The validity of the proposed method and the excellent detection accuracy is demonstrated through tests with SiC machining in high-speed grinding.
Design of the Elevator Wireless Monitoring System Based on LabVIEW
Authors: Yu Xiang , Feng Shi Cai , Luo Jing Wei
Published: March 2015

Elevator wireless monitoring system is an important safeguard to the operation of elevator. It is integrated by the sensors, STC89C52, CC2530, GPRS and LabVIEW. By using those technology, we have designed the collector, network platform and monitoring center. The monitoring center uses LabVIEW to design the display and apply LabSQL to establish the connection with the database. The monitoring display includes user login, system setting, data display, database, help and logout. By testing on the lift, it can reflect the running state in real time and has gained good monitoring performance.
Application of Kriging Surrogate Model in Performance Parameters Optimization of Excavator Cab Shock Absorbers
Authors: Liu Lei , Zhou Yi Qi , Mi Yong Zhen , Lu Dan
Published: March 2015

The surrogate model has been extensively applied in engineering optimization design recently. Based on surrogate model, the complicated functional relationships between variables and responses can be precisely described. In this paper, the Kriging surrogate model are adopted to simulate the relationships between the sound pressure level (SPL) peaks at the drivers right ear (DRE) and the performance parameters of excavator cab shock absorbers with the FEM model, followed by the optimization design been accomplished with algorithm NSGA-II. The results indicate that the SPL peaks and the overall SPL can both be decreased through optimizing the performance parameters with Kriging surrogate model.
Isolation Performance Analysis of a Porous Material Vibration Isolator
Authors: Mao Hua Bing , Huang Yi Zhe , Yang Tie Liang
Published: March 2015

To explore the isolation mechanism and optimize the performance of the porous material in a dynamic viewpoint, a nonlinear porous material vibration isolator is modeled in this work. The stiffness of the isolator is regarded to be a piecewise linear, according to the stress–strain characteristics of porous material. Averaging method is employed to analyze the amplitude-frequency characteristics when the system excited by harmonic excitation. It is found that the vibration system represents linear, bilinear and tri-linear characteristics, when the porous material isolator works in linear-elastic phase, plateau phase and densification phase, respectively. The result shows that the amplitude response of the system in the plateau stage is much less than the linear isolator.
Modeling and Simulation Analysis of Five Times Frequency Flutter of Rolling Mill
Authors: Shi Shu Zheng , Wang Shao Lei , Song Ming Xing , Huo Zhen Zhen
Published: March 2015

Based on nonlinear damping and stiffness consideration between not only work rolls but also back-up roll and body frame, five times frequency flutter model of rolling mill was built according to actual structure of rolling mill, which followed by simulation analysis. Some theoretical guidance can be provided for practical engineering application.
Research of Optimization Technology for the Thermal Circulation of a Vehicle
Authors: Sha Lin , Zhu Hai
Published: March 2015

In this paper, based on the analysis of the heating system defects of a certain type of vehicle engine, the cooling heating system has been simplified and the calculation of the automatic heating process is determined. The time and temperature of the automatic heating in the large circulation condition is calculated. According to the improved proposal, the time and temperature of the automatic heating in the small circulation condition is calculated. The charting data is provided and comparison with the large circulation is analyzed. The theoretical and technical support is provided to improve the engine heating system and lays the foundation to implement the improved scheme.
A Modeling Research of Wind Tunnel Test Based on ADAMS with Rigid and Flexible Body
Authors: Shao Zi Yan , Chen Wen Jia , Li Lu Yang , Hu Yong Jin , Li Guan Jian
Published: March 2015

A new wind tunnel test bed based on the parallelogram institution was chosen to be studied in this paper. In the first way the 3D model was built in detail in the SolidWorks, and then the model was imported into ADAMS to build a rigid model and a rigid-flexible model, finally got the curves of the barycenter position’s parameters through carrying out the simulation separately, which would lay the foundation for the simulation of kinematics and dynamics of the wind tunnel test bed.
Based Fluent Study of Rotary Stream for Sand Reclamation Equipment
Authors: Lu Wen Long , Li Shan , Luo Ying , Chen Qiang
Published: March 2015

The basic structure and principles of rotary stream for sand reclamation device will be introduction. According to the principle of renewable rotary stream for sand reclamation equipment, combination with Fluent numerical simulation model to construct the old sand regeneration process. And according to the impact velocity control problem for sand, using discrete phase model and turbulent model, the sand movement tracking and turbulent kinetic energy and the blowpipe of equipment were analyzed, finally puts forward some suggestions for improvement.
Full 3-D Unsteady Numerical Simulation of Control Stage in Partial Admission Turbine
Authors: Li Guo Ping , Gao Ke Ke , Yang Ke , Xie Yong Hui
Published: March 2015

The unsteady flow parameters in control stage of partial admission are analyzed in details with full 3-D numerical simulation. The full annulus structure of air turbine in partial admission is modeled due to the unsymmetrical geometry. The partial admission is accomplished through the inlet blocked using segmental arc. The unsteady surface pressure changes of eight blades in the transition regions which demonstrate the power output ability are presented. That the entropy rise associated with the losses at different cross mainly caused by mixing losses and flow separation in partial admission is analyzed to estimate the efficiency distribution.
Study on Hydraulic Fracturing Method for In Situ Stress Measurement in Deep Boreholes
Authors: Zhang Yan Xin , Song Chang Sheng , Zhao Jian Hui
Published: March 2015

Information of in situ stress field is crucial for predicting the response of rock masses to the disturbance associated with underground constructions. Hydraulic fracturing is an efficient method for determining the stress field and is suitable at the early stages of projects when no underground access exists. For this, a series of new improved techniques and equipments are developed for the deep boreholes to increase the reliability of system. For a better understanding of the stress test, the ideal HF pressure-time curve is given and the fracturing procedure is analyzed. Based on the theory of HF stress calculation, two implicit inequations are deduced.
Field Tests on the Application of Oscillation Tool with a Fluidic Amplifier to Directional Well Drilling
Authors: He Jiang Fu , Liu He , Yin Kun , Gan Xin
Published: March 2015

The directional well drilling technology is extensively utilized and developed throughout the world. However, series of drilling problems occurred in the operation process of directional drilling. In order to reduce the friction of drilling tools, an oscillation tool with a fluidic amplifier has been field tested, and the pressure pulse of oscillation tool has been obtained. Field test results have shown that the oscillation tool has an extensive flexibility to directional well drilling, and the oscillation tool could stably actuate the drilling tool to have reciprocating vibration, which contributes to the friction and drag reduction of drilling tools. Furthermore, it can be concluded that the pressure pulse value generated by pumped fluid varies with input flow rate, and the pressure of oscillation tool increases while the flow rate is increasing. In addition, the motion frequency of the oscillation tool is exponentially increasing with the raise of pumped flow rate.
Resource Efficient Architecture for Current Control Loop of Two PMSMs
Authors: Ryang Cho Lung , Wang Da Ling
Published: March 2015

This paper presents a novel closed current control loop of permanent magnet synchronous motor (PMSM). Conventional current control loops need two PI controllers per one PMSM. The paper provides a method for reduction of the resource consumption by using one PI controller for two PMSM. Combining with Black Box Blockset written by Verilog HDL based on Xilinx System Generator, one effective PI controller is designed instead of four PI controllers and simulated using Simulink. The utilization of FPGA resources is verified by Xilinx ISE 14.7 tool. The results show that the proposed method can reduce resource consumption and do not influence system performances observably.
Information Security Protection Design of Electric Vehicles Charging Station
Authors: Li Huan , Ru Ye Qi , Li Yi Kang , Guo Hao
Published: March 2015

Information security is fundamental to ensuring the normal operation of charging station. Based on CAN bus and 3G wireless network, this paper discusses current threats for communication network, builds a protection structure of information security, and proposes an overall information security protection framework. The firewall mainly includes digital signature authentication which combines SHA-1 message digest algorithm and ELGamal public key cipher system. Firewall-IDS (Intrusion Detection System) interactive modules and host information security protection modules is also designed. This paper lays a basic foundation for security construction of charging station’s communication network.
Research on Innovation Design of Air Filter Mould Based on Field-Substance Analysis
Authors: Gao Chang Qing , Sun Jian Hua , Lv Jie , Yang Bo
Published: March 2015

Air filter is the important part of air condition systems for the high-speed railways, which has an immediate impact on the air quality. Mould is used for the formation of air filter with the corresponding surface shape. The problem appeared with breakage of the steel wire during the formation process by the mould. Field-Substance analysis and 76 standard solutions are used to describe the problem and generate the solution. The validity of the innovation design is proved with the implementation during the manufacturing practice.
Dynamic Analysis and Optimization of WEDM Based on AWE and LMS
Authors: Xu Hong , Ding Yi Chao , Luo Chui Min , Guan Wen Yong
Published: March 2015

In the operation process, the Wire Electrical Discharge Machine (WEDM) has certain imperfections such as vibration and the descent of machine precision which vibration produces. This paper studies the dynamic parameter of the machine tool and optimizes the natural frequency and vibration. Taking the DK7725 taper machine tool as an example, the paper establishes a 3Dmodel with Pro-Engineer 5.0.According to the Masataks Yoshimura method, the authors could ascertain the stiffness and damping of joint surfaces among machine main parts and ascertain the equivalent dynamic model. In order to have a modal analysis about the machine tool structure, the virtual dynamic analysis module of ANSYS Workbench Environment (AWE) is used. Through the study of dynamic parameter, the authors optimize and improve the natural frequency and vibration of machine tools, compared with the finite element analysis results and the no-optimization data. And the final results show that the change rates of each order natural frequencies optimized ranges from 0% to18.9%, and the whole mechine’s optimization achieves satisfied effect.
A Weighted Optimization Allocation Based on Interval Distribution of Equipment Testability Indicators
Authors: Lv Jian Wei , Xie Zong Ren , Xu Yi Fan
Published: March 2015

On the basis of conception, the characteristics of current testability indicators allocation methods are analyzed. Due to their shortages, we establish a weighted allocation method based on upper and lower limitation to equipment testability indicators and present the initial value of unit’s testability indicators, upper and lower limitation, adjust means to initial value and whole calculation steps. The illustrated example shows that, by this allocation method, dependence to one’s experience can be decrease to the lowest limitation, control to unit testability indicators’ range is perfect, and we can assign the lowest unit testability indicators’ and their combination to realize system’s testability indicators.
A Review of Sufficient Schedulability Analysis for Fixed Priority Scheduling Systems
Authors: Zhai Yan Feng , Zhang Feng Xiang
Published: March 2015

This papercarries out a survey of sufficient schedulability analysis forfixed priority (FP) scheduling. The most common used fixed priority assignment is the rate monotonic (RM) algorithm, according to its policy, the task priorities are ordered based on their activation rates, so that the task with the shortest period is assigned the highest priority. However, when each task’s relative deadline is not equal to its period, the RM algorithm is not suitable to assign the task priorities. When relative deadlines are less than or equal to periods,the deadline monotonic (DM) algorithm can be deployed to schedule the tasks. The utilization based schedulability analysis has the advantage of simple implementation, and manyexisting schedulability analyses on uniprocessor are covered.
Design and Research of Vortex-Tube-Ice-Storage System Used in Refuge Chamber
Authors: Li Jun , Xu Lei , Zhou Nian Yong , Jiang Yan Long , Wang He Xu
Published: March 2015

When disasters occur under coal mines, the electric power system and compressed air system would be highly vulnerable to damage, while heat load will be produced in the chamber because of victims’ metabolism and equipments’ operation, so it is crucial to control temperature in the chamber effectively. This paper presents a new type of vortex tube ice storage refrigeration technology, and the property of a vortex tube is tested and theory of the ice storage system is studied, then the ice making time and the best working state are obtained. It provides theoretical basis for ice storage refrigeration of mine rescue, and it is of important reference value for engineering design.
A Research on Improving the Precision of Rotating-Wave Plate Polarization Measurement
Authors: Hou Meng Han , Lin Wu Mei , Fan Zhen Jie
Published: March 2015

The device errors of a rotating-wave-plate-based polarization measurement system can be mainly categorized as the angle error of the polarization prism, the fast axis angle error of wave-plate and the retardation error. By applying Fourier analysis to solve Stokes vectors, we obtain the formulas to calculate the three errors mentioned above, using linear 0° and 45° polarized light to illuminate the system for the error solving. We analyze the measurement errors of the degree of polarization, the polarization purity and the intensity of polarization state, under certain simulation conditions. The results show that after the calibration, the measurement accuracy is improved. Finally, we analyze the effects of the angle error of the linear polarized light used for calibration to the measurement of the three parameters.
New Method for High Wind Speed Retrieval Using Altimeters Observations
Authors: Gu Yan Zhen , Li Pei Liang , Fan Kai Guo
Published: March 2015

By comparing the normalized radar backscatter cross sections (NRCS) and significant wave height detected by the Jason-1 altimeter with high wind speeds data, an empirical algorithm valid for wind speeds larger than 20 m s-1 is developed and proposed. The study shows that the Root Mean Square Error (RMSE) and average relative error of the new algorithm are 5.44m s-1 and 16.5%, suggesting increased accuracy by including significant wave height in the retrieval algorithm. Therefore, the proposed algorithm, suitable for retrieving sea surface wind speeds in typhoon and other strong wind conditions, could be treated as supplementary algorithm to the Jason-1 operational algorithm.
Monitoring Data Filter and Deformation Information Extraction Based on Wavelet Filter and Empirical Mode Decomposition
Authors: Zhang An Bing , Chen Tian Yang , Liu Xin Xia , Zhang Yu Jie , Yang Yan Tao
Published: March 2015

Analyses of GPS signals by wavelet algorithms and empirical mode decomposition (EMD) have demonstrated the strength of these techniques in discriminating signals from noise. However, the denoising precision seriously affects the final EMD error, especially for signals containing incremental developments in information. We present a new noise filter and trend extraction model based on the orthogonal wavelet transform and EMD. Simulated and real data are used to evaluate the proposed method. The results suggest that: 1) The orthogonal wavelet transform and EMD method can better mitigate the random errors hidden in periodic signals; 2) For signals with a linear trend, the orthogonal wavelet transform filtering method is superior to EMD. We suggest a method of trend extraction by EMD after noise filtering using the wavelet; 3) For signals with a nonlinear trend, theoretical analysis and simulation results show that the new noise filter and trend extraction model is superior to EMD and the simple combination of wavelets with EMD. The proposed approach not only extracts instantaneous features, but also reduces the number of decomposition layers of the signals and the cumulative errors in later decomposition. This method significantly improves the accuracy of the extracted deformation; 4) After mitigating the influence of multipath and other error effects with the new model, we attain millimeter accuracy for the vertical component position in GPS dynamic deformation.
Face Recognition Algorithm Based on Haar-Like Features and Gentle Adaboost Feature Selection via Sparse Representation
Authors: Wang Qing Wei , Ying Zi Lu , Huang Lian Wen
Published: March 2015

This paper proposed a new face recognition algorithm based on Haar-Like features and Gentle Adaboost feature selection via sparse representation. Firstly, All the images including face images and non face images are normalized to size and then Haar-Like features are extracted . The number of Haar-Like features can be as large as 12,519. In order to reduce the feature dimension and retain the most effective features for face recognition, Gentle Adaboost algorithm is used for feature selection. Selected features are used for face recognition via sparse representation classification (SRC) algorithm. Testing experiments were carried out on the AR database to test the performance of the new proposed algorithm. Compared with traditional algorithms like NS, NN, SRC, and SVM, the new algorithm achieved a better recognition rate. The effect of face recognition rate changing with feature dimension showed that the new proposed algorithm performed a higher recognition rate than SRC algorithm all the time with the increasing of feature dimension, which fully proved the effectiveness and superiority of the new proposed algorithm.
Identification of Thermal Process Based on Relevance Vector Machine and Firefly Algorithm
Authors: Qiu Xiao Zhi , Bai Guo Dong , Huang Bao Hua , Xu Wei
Published: March 2015

Thermal process usually has the characteristics of nonlinearity and uncertainty, so it is difficult to establish the nonlinear model by the traditional method of describing the dynamic mathematical model of thermal process and accurately implement optimal control of thermal process. This paper provides an identification method of thermal process based on relevance vector machine and firefly algorithm, and the modeling results are compared with those by minimal resource allocation network and support vector regression. The simulation results show that the method is effective, and the model has high accuracy and can be directly used in control algorithm based on the model.
Intelligent Vehicle Path Planning Based on Improved Artificial Potential Field Method
Authors: Pan Zhou , Li Jia Qi , Hu Kai Min , Zhu Hao
Published: March 2015

Aiming at the path planning for intelligent vehicle in complex environment, local minimum problem is solved by the way of setting a virtual barrier point. And fuzzy controller is designed to make up some inherent shortcomings of artificial potential field method and safeguards the reliability of the path planning and path smoothness.
Research on Function Module Clustering Based on the Rule-Immunity Algorithm for Complex Product
Authors: Chen Xing Yu , Wu Guo Bin , Zhao Han , Sun Qi Feng
Published: March 2015

A two-step strategy was proposed to solve the problems that inefficiency and inaccuracy of function modules clustering for complex product. Firstly, the three principles were proposed that weldment simplification, outsourcing simplification and borrowed component reduction to preprocess and simplify complex product. Then the complex product preprocessed can be clustered into different function modules by using the advanced Immune Algorithm amalgamated with heuristic rule (R-Immunity). By comparing the efficiency, accuracy and robustness of function modules clustering among the Genetic Algorithm, the Immune Algorithm and the R-Immunity Algorithm, we consider that the R-Immunity Algorithm is more efficient and precise to solve the problems related to function modules clustering. Finally, starting with the structure properties of complex product, the clustering results were optimized for the purposes of reducing coupling between modules and satisfying configuration requirements of customer.
A Survey of the Current Status of Force-Feedback Manipulator
Authors: Song Jing Zhou , Wang Guan Ji , Sun Han Xu , Jia Qing Xuan
Published: March 2015

This paper is a survey on research status of the force-feedback master manipulator for teleoperation at home and abroad. The conclusion includes three aspects: mechanism configuration, control strategy and the model of people’s arms. The authors compared different theories already developed. Then they present the strengths and weaknesses of each theory. The conclusion is significant in pointing the direction for future study.
Adaptive Switch Control of Synchronizer for Dual Clutch Transmission
Authors: Li Hong Kui , Lu Tong Li , Zhang Jian Wu
Published: March 2015

This paper focuses on developing a novel control strategy of synchronizer for dual clutch transmission. The synchronization process is investigated and a mathematical model of synchronizer is proposed. The paper proposes a switch control method for synchronizer which is a hybrid dynamical system. The simulation results demonstrate that the performance of the switch controller is reasonable and effective.
Analysis on Numerical Simulation for Bionic Robot Fish Based on CATIA
Authors: Li De Jian
Published: March 2015

Based on the problem that there is a relatively small number of analog simulations on swimming of fish a in specific fluid conducted by science researchers, a simulated tuna model is established in this paper, in which CATIA is used to construct the streamline shape of simulated tuna and the method of computational fluid dynamics is utilized to simulate the swimming of tuna in marine environment. Indexes for fluid performance such as pressure on the surface of robot fish, turbulence kinetic energy and flow velocity of fluid around are focused on, and preliminary research on the variation trend of pressure on the robot fish and of turbulence kinetic energy at different velocities is conducted in this paper. Theoretical analysis and experimental research conducted in this paper may provide some references for design of shape of robot fish in the future.
The Analysis of Free-Floating Space Manipulator when Tracking Desired Force/Position
Authors: Zhang Long , Jia Qing Xuan , Chen Gang , Sun Han Xu
Published: March 2015

For free-floating space manipulator, a double loop control law is applied to the manipulator to achieve the force/position tracking of the end-effector, and the influence to the manipulator system is analyzed in this paper. First, the dynamic model is established based on Lagrange's equations. On this basis, a double loop control law which is based on the idea of impedance control is applied to the manipulator. During the force/position tracking, the influence of each part of free-floating space manipulator is analyzed, especially the base attitude disturbance. Finally, a simulation is given to show the analyze results.
Method of Fuzzy Adaptive PID Algorithm Applying to Engineering Practice
Authors: Yin Zhen Hong
Published: March 2015

The fuzzy adaptive PID algorithm in MATLAB is packed to VB and applied to engineering practice without Matlab environment, it is called like internal strategy in configuration software, it lays the foundation for the intelligent control strategy in the configuration software and online simulation control system.
Discussing on Vehicular Ad Hoc Networks Simulation
Authors: Dai Yin Fei , Zou Ying Yong
Published: March 2015

The paper discussing on the VANET simulating involve in computer, traffic engineering, statistics, psychology, etc., presenting a multidisciplinary tendency. Started from the researching significance and contents of the VANET simulation, this paper introduced the development history and research status of VANET simulation, classified the VANET simulators, introduced and compared typical VANET simulators.