bluuebunny/crossref_metadata_2025 huggingface dataset:
The Design and Implementation of a Certain Information System Joint Debugging and Status Monitoring System
Authors: Zhang Wei , Qiu Chuan Fei , Cheng Hui Hua , Zhou Quan Zhi
Published: October 2014

The joint debugging of large-scale information system and monitoring of running status must rely on special joint debugging and status monitoring system, so as to improve the efficiency of the joint debugging. At the same time, warning will be informed in case of system failure, and then maintenance personnel can first troubleshoot rapidly. Besides the increasing of system reliability, the requirements for system maintenance personnel are greatly reduced. This paper aims to introduce the design of a certain information system joint debugging and status monitoring system.
Apple Snails Polysaccharide Extraction and Pharmacological Potential Study In Vitro
Authors: Liu Jian Tao , Deng Zi Hao , Huang Jian Hua , Wang Ya , Chang Jun , Zhu Du
Published: October 2014

Apple Snails is a snail-like animal. Being snail-like animals recognized as an edible aquatic animal and widely employed in traditional Chinese medicine, this study intends to reveal pharmacological potential of Apple Snails polysaccharide. Crude soluble polysaccharide of Apple Snails was first extracted using the hot water extraction and ethanol precipitation method. And the crude polysaccharide was purified successively using the Sevag method. After purification we found that and apple snails is rich in polysaccharide and the total polysaccharide content can reach to 68.4%. Using Fenton reactions, we found that antioxidant potential efficiency of apple snails polysaccharide is dose-dependent and can reach to 83.77% at the concentration of 5 mg/mL. Importantly, apple snails polysaccharide can efficiently inhibit lung cancer cell line A-549 proliferation in vitro and over 50% cell was killed in the dose of 200 mg/ml at 24 hours post treatment, implying that apple snails polysaccharide is a potential anti-tumor candidate.
LabVIEW Simulation of Optical Feedback Interference Effect in Laser Diode
Authors: Zhang Xiao Qing , Jia Yu Dong , Cao Wen Juan
Published: October 2014

With the aim to determine parameter influences of a measurement system based on optical feedback interference in a laser diode, a mathematic model of optical feedback interference effect is built. LabVIEW which is a kind of graphical programming language is used to realize parameter setting and graphic display by front panel and program chart. Experimental results show that the stripes of optical feedback interference effect are saw-tooth-like waveform when feedback level factor is less than and close to 1, which can be used to determine moving direction of external reflecting object. Feedback interferences generate when vibration amplitude of reflecting surfaces is greater than λ/4. The stripe number is 4N when vibration amplitude dL equals Nλ. Vibrational frequency of external reflecting surface equals the frequency of feedback interference signal and has no influence on stripe number in a period. Measurement of external reflecting object based on optical feedback interference effect has measurement precision less than laser wavelength and real time direction recognition ability.
Recovery of 3D Non-Rigid Structure from Images Based on Trajectories
Authors: Wang Ya Ming , Zhang Z. , Zheng Jun Bao , Tong L.L.
Published: October 2014

In this paper, we address the problem of recovering the 3D structure of a non-rigid object based on trajectories throughout an image sequence. We formulate the 3D non-rigid shape as a linear combination of basis trajectories and compute the rectification matrix using generic algorithm with orthogonal constrains. In order to improve the reconstruction ability, trajectory filters are introduced to eliminate the need for choosing basis size. Experimental results from a human motion image sequences show that the proposed approach is more efficient for recovery of 3D non-rigid structure. Furthermore, the adjustment of basis size is avoided through the success use of trajectory filters.
Research on Gridding Algorithm of Remote Sensing Image Segmentation by Region Growth
Authors: Zhu Hong Chun , Liu Hai Ying , Jiang Tao
Published: October 2014

Region growth is an important method based on regional information, and its gridding process also is an important problem. This research is satisfied with the needs of the remote sensing massive data real time and fast transmission and processing, and developed of the theory and methods research of remote sensing processing based on grid operation. This paper starts with basic principle and mathematical models of region growth. Then some new serial region growth algorithms proposed in recent years are classified and analyzed, based on which their related gridding strategies are emphatically discussed. Then this research analyze and put forward the algorithm, which should be feasible when designing gridding parallel segmentation, and give an evaluation of the parallel regional segment algorithm. Finally, the problems and challenges of future research were pointed out.
Chaotic Genetic Algorithm for Mixed Integer Programming Problem
Authors: Wang Ya Ming , Zhang Z. , Zheng Jun Bao , Tong L.L.
Published: October 2014

This paper proposed a chaotic genetic algorithm (CGA) to solve the mixed integer programming problem (MIPP). The basic idea of this algorithm is to overcome the deficiency of genetic algorithm (GA) by introducing chaotic disturbances into the genetic search process. Two typical MIPP problems are used to evaluate the performances of the proposed CGA. Experimental results show that performances of the algorithm have been improved by the chaotic disturbances, such as, search ability, precision, stability and convergence speed or calculation efficiency. The proposed CGA algorithm is suitable for solving complicated practical MIPP problem.
Identification of Hammerstein Systems with Two-Segment Preload Nonlinearity Based on the Gradient Search
Authors: Zou Hong Fen
Published: October 2014

This paper deals with the parameter identication problem for Hammerstein systems with two-segment preload nonlinearity. Taking into account the complexity of Hammerstein systems, we use theWeierstrass approximation theorem to convert a Hammerstein system into a special form that has linear-in-parameters, and propose a stochastic gradient algorithm to estimate all unknown parameters of Hammerstein systems. Furthermore, a modified stochastic gradient algorithm is given to improve the convergence rate. The applicability of the approach is illustrated by a simulation example.
New OFDM Channel Estimation Method Based on ISI Cancellation
Authors: Cui Jin , Shao Ding Rong , Zhang Bo
Published: October 2014

According to the application needs of OFDM techniques, a new method of orthogonal frequency division multiplexing (OFDM) channel estimation based on inter symbol interference (ISI) cancellation was proposed. The channel estimation was based on circular convolution, after which a low-complexity frequency-domain ZF equalization was used. The performance of bit-error-rate (BER) was also simulated and analyzed under the additive-white-Gaussian-noise (AWGN) channel, Rayleigh fading channel with mobility. The simulation results showed that this method could be applied to the channels of time-varying environments, and could get better performance than the traditional cyclic prefix (CP)-OFDM.
Research on Voltage Fluctuation and Flicker Extraction Method Based on Null Space Pursuit Algorithm
Authors: Chen Xiao Ying , Yang Meng Wei , Jia Shu Wen , Jiang Lei , Zhang Chao
Published: October 2014

In order to obtain more accurate and rapid voltage fluctuations and flicker signal and provide fast and accurate data for power quality analysis and improvement, this paper proposes the improvement measures of null space pursuit algorithm based on the analysis of the principle of null space pursuit algorithm, which improves the value of practical application. By the simulation analysis, it proves that the combined null space pursuit algorithm not only has the same advantage of high precision extraction and decent noise reduction capabilities as original algorithm but also improves its computing speed and enhances its practical value.
Failure Analysis of GCr15 Steel Balls in Ball Screw Pair
Authors: Li Cheng Nan , Yan Ye , Gai Yu Hong , Li Bao Min , Du Wei , Li Mu Sen
Published: October 2014

Based on macro morphology, metallographic microstructure, field emission scanning electron microscope observations and microhardness testing, failure analysis of the GCr15 steel balls in the ball screw pair was dealt with in this paper. The experimental results showed that small scratches and pits were evenly distributed on the surface of the A steel ball which showed features of wear failure. Characteristics of the B steel ball surface morphology were contacted to fatigue failure. Microstructure observation on the cross-section of the B steel ball showed that martensite and carbides were uneven distributed which were caused by the uneven elements distribution in the raw materials. It was the main cause of this abnormal failure. Therefore, the quality of the raw materials needed to be strictly controlled and the reasonable heat treatment process should be adopted to ensure the quality of the steel balls.
An Evaluation Model of Polytechnic Teaching Quality Based on ID3 Decision Making Tree
Authors: Jiang Wu Xue , Zhong Yin Zhen , Liang Huan
Published: October 2014

For improving the quality of vocational education evaluation validity, this paper introduces the research progress of teaching evaluation, use data mining technology to put forward a feasible model of higher vocational teaching quality evaluation, construct a decision tree has practical significance. By the method used, the traditional Apriori algorithm is improved decision tree to improve the teaching contents to the location of the second master node, reflecting the characteristics of vocational teaching practice. Case analysis indicated, the decision tree has a good operability and high credibility.
Design and Implementation of Electronic Bus Stop Boards System Based on Wireless Communication Module
Authors: Zhang Cai Rong , Liu Guo Liang , Wei Bin
Published: October 2014

To the convenience of passenger travel, a kind of electronic bus stop boards system is discussed in this paper, which can be considered as intelligent equipment based on wireless communication technology. The combination between short-range wireless and long-distance communication module, together with the microcontroller composes the electronic bus stop boards system. The electronic bus stop boards system indicates the number of stations away from passengers’ station board on different nearest buses, current time and real-time humiture. The test results showed that the system could realize short-range and long-distance communication function and display the necessary information. With the advantages of high reliability and efficiency at low cost, the electronic bus stop boards system has more practical popularized value to replace traditional intelligent station boards with GPS and GPRS by cheap wireless communication module.
Research on Subjective Items Grading Strategy of Network Examination System Based on VBA Macro
Authors: Yang Bo , Zhang Li Na
Published: October 2014

Along with the rapid development of computer technology, application of technology of network, communication, database and so on to the daily teaching activities become very practical method. The network examination is an attempt to replace the traditional examination mode, more and more subject’s examination using a paperless network examination mode. In this paper, we take basic computer course as an example, investigate the related evaluation technology, and give the basic design principle and coding method for automatic scoring function of basic computer course papers.
Molecular Beacon-Based Fluorescent Biosensor for Sensitive Detection of Single Nucleotide Polymorphism
Authors: Zhang Song Bai , Tang Meng , Zheng Li Ying , Hu Xia , Shen Guan Gyu , Liu Xue Wen , Lu Jin Lin , Chen Yuan Dao , Qiu Li Ping , Zhou Shi Biao
Published: October 2014

A sensitive fluorescent biosensing strategy based on structure-switching of molecular beacon for the detection of single nucleotide polymorphism is proposed in this study. In the absence of target DNA, only low background fluorescence can be detected since the formation of hairpin structure induces close proximity of fluorophore and quencher. On the contrary, the fluorescence intensity increases significantly after introduction of target DNA because structure-switching of molecular beacon results in separation of fluorophore and quencher. The change of fluorescence intensity is linear with concentration of target DNA, and a molecular beacon-based sensing system for fluorescent detection of single nucleotide polymorphism is fabricated. The target DNA can be sensitively detected in a linear dynamic range from 17.58nM-1.125μM with a low detection limit of 8 nM. Moreover, good reproducibility and high specificity are achieved.
Optimization Research on Buckwheat Vinegar Fermentation Process
Authors: Ma Ting Jun , A Yi Na Xi , Yang Xiu Shi , Qin Pei You , Liu San Cai , Ren Gui Xing
Published: October 2014

Buckwheat is rich in active substances with hypoglycemic effects. Submerged fermentation, as the method of brewing buckwheat vinegar, not only has the advantages of shortening production cycle, saving materials etc, but also has high functional active substances. In this study, the process of the submerged fermentation of acetic acid fermentation was optimized by the orthogonal experiments of L9 (34), which was also on the basis of single factor experiments. The results indicated that the conversion rate of acetic acid can become 95.8% when the initial alcohol at 6% (v / v), inoculum at 10%, fermentation temperature 30°Cand fermentation time 60 h.
Quantitative Trait Locus Analysis for Yield Traits of Cassava (Manihot esculenta Crantz)
Authors: Yan Qing Xiang , Li Kai Mian , Li Qing X. , Huang Dong Yi , Zhang Xue Qin , Ye Jian Qiu , Chen Song Bi
Published: October 2014

The QTLs associated with cassava yield traits were detected by two-QTL model (unconditional and conditional QTLs) approaches after planting for 90 d, 180 d and 270 d in the present study. A genetic linkage map was constructed with a segregating F1population derived from a cross of 2 heterozygous parental plants from the cultivars South China 6 and Mianbao, and analysed with 39 SSR markers. The constructed linkage map of cassava consisted of 12 linkage groups covering a total length of 694.59 cM with a mean distance of 17.81 cM between two markers. The F1 population was evaluated for components of yield including fresh root yield (FRY), harvest index (HI), and starch content in dry root weight (SC) at 90 d, 180 d and 270 d. The identification of QTLs for yield traits at three growth periods explained 56.4% for FRY, 16.3% for HI and 27.3% for SC, suggesting characterization of yield components. The work made a step closer to understand the persistence of quantitative genetic variations of cassava in different development periods.
Failure Analysis on the GCr15 Bearing Steel and the 20CrMo Carburized Steel Nuts of the Ball Screw Pair
Authors: Gai Yu Hong , Yan Ye , Li Cheng Nan , Li Bao Min , Du Wei , Li Mu Sen
Published: October 2014

Failure analysis on the GCr15 bearing steel and the 20CrMo carburized steel nuts was performed after two sets of fatigue tests of GD8020×1100 ball screw pair. By means of scanning electron microscopy observation, energy dispersive analysis and microhardness testing, it is found that there is an obvious indentation, slight pitting and microcracks on the raceway of the GCr15 bearing steel nut and shows the characteristics of contact fatigue failure. The nonuniformity of microstructure and the lower carbon and chromium content in the indentation, leading to local lower hardness, account for the nut failure. While the raceway of the 20CrMo carburized steel nut is more rough with scratches caused by the damaged steel balls so as to show the characteristics of wear failure. Therefore there are different failure ways for the different nuts made by different steels and heat treatments under the same fatigue testing condition.
Application Performance of Super Ferrite Stainless Steel on Condenser in Power Plant
Authors: Guan Xiao Rui , Zhang Da Lei , Jin You Hai
Published: October 2014

The application performances of TA2 titanium\S44660 super ferrite stainless steel\B30 cupronickel, which are widely used in power plant, were researched using electrochemical test and mechanical test. The results show that corrosion resistance of B30 is significantly lower than TA2 and S44660. Besides, corrosion resistance of S44660 is superior to TA2. Yield strength and tensile strength of S44660 is higher than TA2 and B30. When considering thickness of cooling tubes, flow rate of cooling water and clean coefficient, the thermal conductivity of three materials have little differences. The shock resistance of S44660 is better than TA2 and B30. S44660 contains a small amount of Ni, which improves greatly the anti-cracking ability of the base metal and welding bead.
The Preparation and In Vitro Release Study of the Novel Changchun Amine Sustained-Release Capsules
Authors: Liu Ping , Zhang Jin Liang
Published: October 2014

Objective: to prepare sustained-release capsules, changchun amine build release degree determination method, study its drug release characteristics and compared with the reference preparation. Methods: using ordinary dissolution apparatus and fiber stripping analyzer to determine the in vitro release of sustained-release capsules. The content determination method, drug to pH 1.5 sodium chloride for the release of the medium of hydrochloric acid solution, using ultraviolet spectrophotometry to release a quantity, at the same time by optical real-time test evaluation of homemade consistency and reference formulation of drug release. Results: the analysis method can be effectively used to build the release of sustained-release capsules to measure, two kinds of similarity factor is more than 50, drug release characteristics match each batch sample, quality and stability. Conclusion: the self-made samples and reference preparation have similar in vitro release characteristics of homemade capsule good slow release effect, drug release and stability.
Theoretical Simulation and Feasibility Analysis of the Estimation of Crop Leaf Chlorophyll Using Narrow Band NDVI
Authors: Wang Hong , Shi Run He , Liu Pu Dong
Published: October 2014

Remote sensing technology is one of the best methods for the large-scale monitoring of chlorophyll in crops. This study analyzes the feasibility of estimating the contents of chlorophyll by means of narrow band normalized difference vegetation indices (NDVInb). The reflectance of the two bands forming the NDVInbis from simulations run on the PROSPECT model. A traversal of possible combinations of NDVInbare examined from 400 nm to 800 nm. Our results indicate that, at the leaf level, estimation of chlorophyll content can be identified in NDVInb. Ranges for these bands include: 1) 720-735 nm combined with 400-428 nm; 2) 550-615 nm, 692-701 nm or 707-715 nm combined with 400-432 nm or 462-496 nm; 3) 562-589 nm, 616-662 nm or 729-737 nm combined with 434-454 nm; and 4) 664-687 nm combined with 550-615 nm or 692-701 nm.
Study on High Voltage Electrostatic Field Thawing Technology of Fish
Authors: Bai Ya Xiang , Huo Yuan , Kang Bin
Published: October 2014

In order to improve the thawing qualities of fish, a thawing process of high voltage electrostatic field (HVEF) was studied. It was compared with nature thawing on the basis of thawing rate and the fish’s qualities index such as pH, thawing loss, cooking loss and total volatile basic nitrogen (TVB-N). The results showed that the high voltage electrostatic field can improve the thawing rate of fish significantly. Compared with nature thawing, the thawed fish under t HVEF had better qualities such as lower thawing loss and total volatile basic nitrogen (TVB-N). HVEF thawing has advantages, which can be used as a substitute method.
Application of Three-Dimensional Fluorescence Spectroscopy Coupled with ATLD in Rapid Determination of Triazophos Content in Duck Meat
Authors: Zhao Jin Hui , Xiao Hai Bin , Yuan Hai Chao , Hong Qian , Liu Mu Hua
Published: October 2014

The triazophos is a kind of organic phosphorus pesticide, the quantitative determination model based on three-dimensional fluorescence spectroscopy coupled with alternating trilinear decomposition (ATLD) was explored for realizing the rapid determination of triazophos content in duck meat. Firstly, three-dimensional fluorescence spectra of duck meat extract, triazophos standard solution and duck meat extract containing triazophos were explored, respectively. Secondly, the fluorescence quenching phenomenon of the triazophos in duck meat extract was analyzed. Lastly, the number of components for three linear decomposition of ATLD was set as 2 by using the core consistency diagnostic, and the calibration curve between the relative fluorescence intensity and the actual concentration of the triazophos was established by using ATLD. The experimental results showed that the determination coefficient (R2) and the root mean squared error of prediction (RMSEP) for the proposed model in this paper were 0.9741 and 0.764 respectively, and it was feasible to predict the triazophos content in duck meat combining with three-demensional fluorescence spectroscopy and ATLD.
Dynamic Assessment of Hip Fracture under Different Impact Configurations: An Explicit Dynamic Analysis Approach
Authors: Chen Da , Chen Xiu Min , Chen Qin Qun
Published: October 2014

Dropping the hip causes stress transfer in the femur. Understanding stress transfer during dropping of the hip is very essential for the surgery .In this study, two computational models are constructed and used to simulate two hip fall scenes. We employ explicit dynamics analysis method to explore dynamic damage mechanism of hip joint, providing biomechanical basis for surgical intervention. The simulation results show that the stress continues to increase in the beginning and reach a maximum during dropping. In scene one, high stresses were presented on the femoral neck when the trochanter impacted the ground, and they were presented on the femoral trochanter when the ilium impacted the ground. The peak stresses were greater than yield point, the neck and trochanter were broken. In scene two, high stresses were presented on the femoral head when the distal femur impacted hit the ground, and they were presented on the femoral neck and shaft when the ilium rebounded from the ground. The later stresses were greater than yield point, the femoral neck and shaft were broken.
Application of Computer Digital Technology in Orthopedic Treatment
Authors: Chen Hui Gang , Mi Ya Li
Published: October 2014

The application of computer digital technology in orthopedic treatment is studied. In the field of orthopedic therapy, computer digital technology need to be applied to process of collecting the lesion area to provide the basis for clinical diagnosis and treatment. This paper presents an orthopedic lesion region image segmentation method based on linear analysis algorithm, this method can be adopted to segment orthopedic lesion region effectively, precise location and lesion extent of lesion area obtained to provide data to support the clinical diagnosis. Experimental results show that orthopedic lesion area image segmentation method based on​​ linear analysis algorithm applied to the process of orthopedic treatment, can improve the cure rate efficiently.
An Improved WLAN Positioning Algorithm Based on RSS Variation over Physical Space
Authors: Deng Zhi An
Published: October 2014

An improved maximum likelihood (ML) positioning algorithm in WLAN is proposed. In contrast to the previous ML and weightedk-nearest neighbor (WKNN) algorithm, additional information about RSS variation over physical space is deployed in the proposed algorithm. The RSS variation information is integrated to modify the Gaussian kernel width of the ML algorithm. Besides, the mean value for Gaussian likelihood function is modified by mean RSS value of the physical adjacent reference points. Experiments are carried in a real WLAN indoor environment and the well-known ML algorithm and weightedk-nearest neighbor (WKNN) algorithm are also compared. Experimental results show that the improved ML algorithm performs best and obtains 13.0 percent improvement than compared algorithms in the sense of mean positioning error.
Application of BP Neural Network in PSD Nonlinear Correction
Authors: Yang Zhuo Jing , Zhang Jian Wei , Hao Wen Jie , Yang Jin Ping
Published: October 2014

Because resistance of two-dimensional position sensitive detector's (PSD) photo surface is not absolute uniformity that its output is nonlinear. It is this feature enables the PSD difficult to measure small displacement. In order to solve this problem, BP neural network is proposed to solve the problem of PSD nonlinear correction after the study of traditional nonlinear correction method; BP neural network would have a strong ability of nonlinear mapping after training, and it can approach arbitrarily contact function by arbitrary precision, and MATLAB neural networking boxes can simulate BP neural network easily. Simulation and verification indicate that the method has a remarkable effect in solving nonlinear problems, and it can meet system requirements.
Fault Signal Detection Model for Large-Scale Circuit Communication System
Authors: Chen Bao Sheng
Published: October 2014

In the process of fault signal detection for large-scale circuit communication systems, with traditional methods to process detection, the fault detection method is more conservative. A fault signal detection for large-scale circuit communication system based on QRS wave group detection method is proposed. The signal to be measured is transformed appropriately in the time domain or frequency domain to strengthen or separate the QRS component, in order to suppress interference from various noise to signals, and the fault point of circuit communication system fault signal is identified, the filter is utilized as representative to process multiscale decomposition for fault signals of circuit communication systems. Experiments show that QRS wave group detection method can determine the occurrence time of the circuit system fault signal, and further estimate the nature of the fault signal, thus, the fault point of communication system fault signal is found to improve the efficiency of detection.
LDPC Coded PPM and Iterative Detection for Free-Space Optical Links
Authors: Liu Xiao Jian , Xu Wei , Wang Jue
Published: October 2014

The pulse position modulation, which has the advantage of average energy efficiency and bandwidth efficiency, is an attractive modulation scheme for free-space optical communication. An important practical issue is to employ an efficient channel coding to this modulation. In this view, we consider the use of low density parity-check code together with iterative soft demodulation and channel decoding at the receiver. In particular, we discuss the calculation of the soft information at the demodulator to accommodate the LDPC decoder. We show that the proposed scheme is quite efficient against demodulation errors due to the receiver noise.
P-Box Theory and SVM Methods with Application in Pattern Recognition
Authors: Ding Jia Man , Du Yi , Wang Qing Xin , Jiang Ying , Jia Lian Yin
Published: October 2014

In order to solve the problem of the information loss on the feature extraction process in the traditional pattern recognition, a new method based on probability boxes theory was proposed. Firstly, the skewness of the fault signal data were used as the information source to construct the tow p-boxes about X and direction. Then, to take advantage of the complementation of the information source, the tow p-boxes from different directions were fused. Finally, the SVM features database was established by extracting different types of cumulative uncertainty measures from p-boxes. The analysis result shows that the combination of p-box and SVM can achieve a high recognition rate, which makes a new way for pattern recognition.
Research of Traffic Signal Control Strategy Based on the Fuzzy Control
Authors: Yan Xue Bo
Published: October 2014

To ease the traffic pressure on urban traffic signal control strategy research started. Dynamic change prediction analysis of traffic flow through the flow of information as a basis for fuzzy reasoning, automatically adjust the signal cycle, green ratio and phase control parameters, real-time signal timing to generate optimal solutions for optimal control effect. The results show that this method can effectively alleviate traffic congestion, meet the design expectations.
System Identification of a Class of Second-Order Continuous System
Authors: Jia Zhi Gang , Wang Xing Xuan
Published: October 2014

An identification method of a class of second-order continuous system is proposed. This method constructs a discrete-time identification model, forms a set of linear equations. The parameters can be obtained by least square method. Simulation results show that the method is effective for a class of second-order system, and is not only for step response but also for square wave signal.
The Research of Sensor Application Status
Authors: Wang Xiao Wen
Published: October 2014

Sensing technology is a rapid development of technology, is one of the main technology of modern information technology, developed countries in recent years the use of sensors in the information society a new understanding and evaluation, and sensor technology has been widely used in various fields. This paper mainly introduces the temperature sensor, pressure sensor, displacement sensor, the principle and application of the current sensor.
Virtual Simulation of PCA Algorithm and Detection Technique of Capturing Fashion Show Movements
Authors: Zhang Ying , Zhou Li
Published: October 2014

3D animation technology is introduced into a virtual fashion show to design a new fashion show of show creation system in this paper. This system combines image processing and reconstruction technology and Matlab software, the two methods and tools. Through the change of frame vector data, it realizes the reconstruction of image. In order to improve the speed of image capture and reconstruction, PCA algorithm is adopted to reduce the dimensions of the vector data of each frame image. This system makes The three dimensional animation technology and performing choreography get together, which has achieved better artistic effect of show design, and has provided technical reference for the computer design of virtual fashion show in universities.
Virtual Simulation Technology of Wireless Sensor Neural Network in Basketball Movement Distribution
Authors: Hou Liang Yong
Published: October 2014

With the innovation of computer hardware technology and software technology, virtual simulation technology has been applied in various fields, including sports training and basketball teaching process. In this paper, the basketball technology actions optimization system is designed by using MATLAB virtual simulation method, and the initial signal calculus model of basketball technology actions is established by using wireless sensor signal transmission principle, and then using the trained neural network method carries on processing for the initial signal, combining the approximation degree of optimal training signal and original signal determine the validity and reliability of the simulation. Through the simulation, we finally get the optimization allocation effect of the number of neurons’ best basketball technology actions, which provides a new computer method for the exploration of basketball training new method.
An Overview of Worst-Case Execution Time Estimation for Embedded Programs
Authors: Kong Liang Liang , Shi Lin Xiang , Chen Lin
Published: October 2014

Most embedded systems are real-time systems, so real-time is an important performance metric for embedded systems. The worst-case execution time (WCET) estimation for embedded programs could satisfy the requirement of hard real-time evaluation, so it is widely used in embedded systems evaluation. Based on sufficient survey on the progress of WCET estimation around the world, it proposes a new classification of WCET estimation. After introducing the principle of WCET estimation, it mainly demonstrates various types of technologies to estimate WCET and classifies them into two main streams, namely, static and dynamic WCET estimations. Finally, it shows the development of WCET analysis tools.
Analysis of Carburetor Modal Based on ANSYS
Authors: Xu Guang Hua
Published: October 2014

The choice of the element type of finite element is different and the division of elaborate degree of meshing is different, so the results of analysis on different modals are different. Combined with the use of ANSYS, specific practice analysis of modals, experimental result, various methods of modal analysis, this article states about the specific methods of modals analysis on carburetor.
Analysis on Effect of Cooling Oil Temperature on Cutting Stability of Gear Shaping Machine
Authors: Yu Hai Tao , Chen Lie , Zhou Chang Bing , Guo Rui Wen
Published: October 2014

With the demands of machine tool accuracy and stability for manufacturing are getting higher and higher, the effect of cooling oil is increasingly evident. And it is proved that cooling oil temperature is an important factor for machine cutting precision and stability. Continuous cutting test was carried on and values of over pin dial (M) were measured. The results show that it has large effect of cooling oil temperature on the stability of M-value. Subsequently, test of machine capability index (CMK) was carried on. And it was verified that the CMK of gear shaping machine is larger than 1.67. And the results show that the fluctuation of M values is the smallest when cooling oil temperature is 33°C. Lowest time costing for adjusting the processing system, highest cutting accuracy, and smallest value of stable amplitude for Gear Shaping Machine could be obtained at this condition.
Dynamic Characteristics Analysis of Simulator Six-DOF Platform
Authors: Liu Yong Qiu , Zhai Ying Xin , Liu Xiao Feng
Published: October 2014

Six degrees of freedom motion platform is an important part of the flight simulator. To study the dynamic characteristics of the simulator, the paper carried a six degree of freedom motion platform dynamics analysis, and proposed fuzzy PID control strategy, and through the ADAMS software to establish a simulation model of six degrees of freedom motion platform, simulation results show that the use of strategy has good control effect for the simulator is designed to provide some reference.
Evidential Study of Relationship between Flexible Drift of Fuel Nozzle Performance and Hot-End Failure of X Engine
Authors: Xu Yong Gang , Wang Qiang
Published: October 2014

By means of the fountain-convergence analysis method of FRRU (Flow Resistance-Rigidity Uniformity) index defined by the author, evidential comparison analysis study has been made to the relationship between flexible drift of flow performance of WTD (Weight Type Distributor) valves of fuel nozzles of X engine and hot-end failures of X engine. The results show that during the initial period of engine start, because of the relative scarcity of air in the combustor, a convergence characteristic, due to its converging flow property ofmultiple to one, can lead to such hot-end failures as turbine blade fusion break which is characterized byabrupt change, while a fountain characteristic, due to its diffusing flow property ofone tomultiple, cannot result in any hot-end failures.
Investigation on Mechanism of Ultra-Smoothed Surface with a Micro Slot on the Flank Face in Micro Cutting
Authors: Zhang Tao , Qi Hou Jun , Li Gen
Published: October 2014

Micro cutting is a promising manufacturing method to obtain good surface integrity. Surface roughness shows size effect when the uncut chip thickness is smaller than the cutting edge radius. A special micro slot on the flank face of cutting tools was manufactured with discharge. Two groups of micro orthogonal cutting were conducted. The surface roughness of machined surface was measured and compared to each other. The results show that surface roughness decreases first and then increases with the ratio of uncut chip thickness to cutting edge radius. The surface machined with micro slot is better than that of without micro slot due to the micro slot restrain the back side flow of work piece based on the finite element model.
Lubricant Retention Property of Micro Wire Electrical Discharge Machining Surface
Authors: Ding Hai Juan , Li Xiao Hai , Wang Dong , Hu Xiao Ping , Xia Guang Lan
Published: October 2014

Based on the topography of micro WEDM surface, lubricant retention, bearing capability, and sealing performance were evaluated by using the surface bearing index, lubricant retention index of core area, and lubricant retention index of valley bottom respectively. The results show that the micro WEDM surface with the characteristic of isotropy texture is beneficial to store lubricating oil, and the lubricant retention property is superior to that of the traditional machining surface.
Parameterized Modeling of Involute Helical Gear by UG Based on Symmetric Equation
Authors: Chen Hong Sheng , Zhuang Su Tao
Published: October 2014

Swept method is a commonly used parametric modeling method for helical gears. For the problem of tooth profiles distortion and parameters loss in parametric design, the symmetric equations that used to establish involutes and dedendum transition curves are proposed. The boundaries between teeth and the starting and ending angles of tooth profile curve are precisely calculated. Feature-based swept methods are applied as solutions. Instance modeling results demonstrate the accuracy of the methods and also reflect their preciseness and convenience.
Research on Single Neuron Adaptive PID Controller
Authors: Chen Xiu Jia , Qiu Hong Di
Published: October 2014

The paper focuses on single neuron adaptive PID controller based on unsupervised Hebb algorithm, and simulation research on the controller is carried out for a second-order pure lag process system. Simulation results show that through learning and adjusting weights of single neuron adaptive PID controller, its online self-tuning ability can make timely adjustment of PID controller parameters according to controlled object changes and external disturbances in order to ensure that the stability and robustness of the system and, ultimately, more satisfactory actual control effect is obtained. At last, the control characteristics and parameter design rules are concluded.
The Design of Control System of Piston Pin Punching Recess Automatic Drilling Dedicated Machine Tool
Authors: Wang Li Hua , Wu Xiao Qiang
Published: October 2014

The piston pin punching recess automatic drilling machine tool, is a dedicated machine tool designed and manufactured to solve the possess of piston pin punching recess. This paper studies the design of the dedicated machine’s control system, which uses open CNC technology, hydraulic technology, PLC technology, electrical technology, and human-machine interface technology. The control system can achieve the automation of feeding and blanking process. Replace of control panel, adopting touch screen to achieve operational control, and monitor the status of real-time job on the machine.
The Design of Thyristor DC Speed Regulation System Based on Ziegler Nichols PID Control
Authors: Dai Yue Ming , Qiao Shu Yun
Published: October 2014

In this paper, a method based on Ziegler Nichols - frequency response of the adaptive PID controller is proposed. The control circuit identifies online important critical frequency response characteristics of process object through input and output data in the normal process operation, and then the system online update PID controller parameters based on Ziegler - Nichols tuning rules or by the improved method. The adaptive process of PID controller does not require any prior knowledge of the system, but it can always guarantee control circuit run in the best condition. The results show that the method has stronger robustness and adaptive ability.
The Economic Effect Evaluation Analysis of a Kind of Automatic Demolition Device for Shipboard Artillery Ammunition
Authors: Wang Jun Sheng , Liu Di , Wang Yi Dong
Published: October 2014

The related technologies with shipboard artillery ammunition automatic demolition device uses is described detailed in this paper, and its function of the device is analyzed in detail. The reliability evaluation analysis method of device is proposed in this paper. The economic benefit of shipboard artillery ammunition automatic demolition device is evaluated with following three aspects such as : working hours, employee training and workshop . It is obvious that the production and application of device has profound significance.
The Study of Hydraulic Valve Position Control Based on PLC Controller
Authors: Zhang Chun You , Wang Cong Rui
Published: October 2014

With the growing shortage of water today, in order to control the flow of pipe conveyance, it is essential for further study of automatic control valves, especially the automatic control technology of control valve. In this paper, by using programmable control and signal transmission technologies etc. a prototype model of hydraulic valve position control is constructed. Prototype model is designed as the closed-loop of position control system, by using high-precision angular displacement sensor detecting the position of the valve plate, converting the output signal of sensor into an industrial process signal 4-20mA with the low-drift transmitter chip XTR101, and with modular PLC as system control center, using three-phase inverter controlling the steering and speed of motor and cooperating with closed pump control system for hydraulic drive, it achieves the closed-loop control hydraulic valve position. This paper provides some technical support for the better use of water resources.
Virtual Design and Verification for 3-RRC Car Multi-Dimension Vibration-Absorption Device Based on ADAMS
Authors: Qian Yong Ming
Published: October 2014

It is affected by multi-dimensional vibration during car’s driving. In this paper, the forms of multi-dimensional vibration from car instruments and equipment are determined, and the type selection principals for main body mechanism of car multi-dimension vibration-absorption device are introduced. Besides, using software ADAMS, virtual design and kinematical characteristics test for car multi-dimension vibration-absorption device are fulfilled.
Design of a Novel Back-Emf Filter for Sensor-Less BLDC
Authors: Yu Tao , Jiang Shu Hua , Park Sung Jun
Published: October 2014

In this paper a novel filter structure which can be used to find the zero point of the sensorless back-emf of BLDC is proposed. The back-emf amplifier circuit applied this structure is a kind of analog and digital mixed type. It can improved sensorless performance under low speed situation greatly. At last the production and experiments were carried out based on the 100W BLDC driver system. The applicability of the proposed structure was also verified
The Simulation Study of Electromagnetic Wave Propagation Characteristics in Closed GIS Tank
Authors: Chen Jun , Li Jin Bin , Xia Tian , Zhu Shi Ming , Yang Yuan , Yang Ning , Li Jun Hao
Published: October 2014

Partial discharge (PD) detection using UHF signal is a well known advanced detecting method in GIS and has been actively studied. Numerical simulation using finite difference time domain (FDTD) algorithm is performed to investigate the transmission characteristics of W-M waves excited by partial discharge through straight closed tank of a GIS bus in. The time domain decaying characteristics and frequency domain resonance characteristics is studied in this paper. The simulation results shown that for the closed tank, E-M waves attenuate little during transmission and distribute oscillating in the tank. The distributions are symmetrical at 0 degree and 180 degrees and the energy at the two types of degrees is the same.
Test Bench Development for Civil Aircraft Integrated Electrical Mechanical Control System
Authors: Zhang Lei , Fan Rui Jie , Xiong Tian Xiang
Published: October 2014

Test bench requirements for integrated electrical mechanical control system are first introduced and their rationales are analyzed. Furthermore, test bench architecture, software and hardware is presented in detail. Finally, through a demo application of water waste system simulation experiment, test bench functionalities are demonstrated partly.
New Powertrain Development for Electric Hybrid Vehicles
Authors: Wang Ren Guang , Zhang Ming Jun , Shi Chuan Long
Published: October 2014

A new type of powertrain system was developed for electric hybrid vehicles. It is mainly composed of engine, first electric motor, first shaft, synchronizer mechanism, second electric motor, planetary gear set and second shaft. The adoption of one planetary gear set and synchronizer mechanism make it can be operated in four different operation modes with high energy efficiency and lower cost, its four operation modes are pure electric driving, hybrid driving, independent engine driving and regenerative braking. These four operation modes can fit the vehicle practical conditions according to order from the control system.
Research on the Control of AFE Converter
Authors: Tang Jian , Zeng Yue Nan , Zheng Lei , Liu Jin Hui
Published: October 2014

In this paper, a strategy of AFE converter based on direct power control is presented. The AFE converter possesses the merit of sinusoidal current on grid-side, controllable power factor and constant DC voltage, meanwhile, power feedback to the grid can be realized. Firstly, a power control mathematical model of AFE converter in two-phase synchronous rotating coordinate is built, on this basis, adopts the square of voltage control in the outer control loop and limits the slope of the setting voltage to improve the starting performance; then uses power feedforward decoupling control in inner control loop , combines with the instantaneous power theory and uses space vector control algorithm to replace the switch table to solve the problem that switching frequency is not fixed in traditional direct power control. Ultimately realizes the independent control of active and reactive power without decoupling. The experimental results verify the correctness and validity of the proposed control strategy.
Research on the Airborne Pulse Doppler Radar Jamming System Tester
Authors: Zou Tao , Zeng Xian Lin , Peng Jian Hua
Published: October 2014

This paper introduces the design of an airborne pulse Doppler radar jamming system tester. Based on a detailed analysis of the functional structure of the radar-jamming system, we summarize the important failure mode. To achieve fault location and performance testing, we have developed an automatic detector for the radar-jamming system, the device uses a mode of hardware platform and software platform, and it can reach the purpose of fault location by a method of encouraging input and measuring the output of each of the radar-jamming system failure mode individually. The automatic test instrument has the features of simple operation, high degree of automation, real-time, scalable, and actual use of running proves it to reach the required design specifications, the test with good results.