bluuebunny/crossref_metadata_2025 huggingface dataset:
Process Monitoring of Filter Press in Hydrometallurgy Based on PCA
Authors: Wang Qing Kai , Zou Xiao Yu , Wang Shu , He Da Kuo , Zhou Yang , Wang Jia Zheng
Published: March 2015

Hydrometallurgy is a popular metallurgical technology. Filter press is common but vital to the production of hydrometallurgy. Hence, the process monitoring of filter press is of great significance for hydrometallurgy. Due to data analysis and related knowledge of filter press, Principal component analysis (PCA) is applied to process monitoring of the filter press via two traditional statistics. However, modeling and test data collected from actual production suffers from outliers, missing data, inconsistent sampling period between variables. Based on these practical problems, corresponding data proceeding technique is proposed. The final application simulation illustrates the validity of the proposed method.
The Design of the Diameter Measuring Gauge of Filter Rod Forming Machine Based on TRIZ and TOC
Authors: Yang Zhi Hao , He Bang Gui , Yang Chao Li
Published: March 2015

The initial designed structure of the diameter measuring gauge of filter rod forming machine is too large, so that it cannot be installed in the limited space of filter rod forming machine. Because of this, the structure of the diameter measuring gauge is redesigned in order to overcome the space constraints of filter rod forming machine. Firstly, the diameter measuring gauge of KDF2、KDF3 type filter rod forming machine is redesigned by combining the advantages of the theory of inventive problem solving (TRIZ) and constraints (TOC). Next, through constraints theory, finding the main contradictions of initial design and then contradictions can be eliminated by using inventive problem solving theory. Finally, diameter measuring gauge of filter rod forming machine design should be available, and the product design successfully. It is the first time that this type diameter measuring gauge is designed and installed on the KDF2、KDF3 type filter rod forming machine successfully across the country.
How to Support the Diversity of Network Measurement Requirements
Authors: Wang Jing , Wang Bing Qiang , Zhu Ke , Shen Juan
Published: March 2015

As the rapid development of network, the requirement of network measurement becomes various and the results of network measurement are applied in many fields including anomaly detection, accounting, network management etc. But the measurement resources are limit and the measurement tools or algorithms are not flexible. So how to support the diversity of network measurement requirements must be studied. With reference to the SDM, this paper proposes a novel hierarchical measurement structure including three layers and provides the network measurement reconfiguration model (NMRM).The NMRM decouples the measurement requirement from the measurement resources and supplies an ability of reconfiguration of network measurement by composing the measurement resources according to some measurement requirement dynamically. The NMRM can support flexible, dynamic and concurrent measurement in the network.
Evaluations of Measurement Methods for Parallel Strand Cables
Authors: Zhang Zhuo Jie , He Jin Quan , Lin Yuan Chi , Liu Xin Huan , Han Xiao Cheng
Published: March 2015

Cable tension is one of the important indexes of cable integrity as well as bridge stability and can be measured by various tension measurement methods. Parallel strand cables are special in structure, so the cable force measurement is more complex and difficult than other types of cables. In order to evaluate the common measurement methods for parallel strand cables, based on the Tongling Yangtze river road-rail bridge, the monitoring data during constructions were collected for statistical analysis. This paper summarized the common measurement methods for parallel strand cables, compared the test data form different measurement methods and in different construction stages. The results show the lift-off method assisted by the vibration wire load cell method can ensure force uniformity, the difference of forces measured by the vibration frequency method, the load cell method and the lift-off method is less than 5%, which can basically meet the constructions control requirement of cable force. This paper offer good reference value to other similar parallel strand cable stayed bridges.
Study on Spatial Frequency Domain Algorithm and White Light Interference System Based on NMM
Authors: Jian Li , Lei Li Hua , Li Dong Sheng , Fu Yun Xia , Li Yuan , Hu Jia Cheng , Deng Lin Juan
Published: March 2015

White light interference technique for topography measurement effectively avoids phase ambiguity in phase-shifting interferometry. The spatial frequency domain algorithm based on scanning white light interference technique has the advantage of insensitivity to noise and higher calculation accuracy compared with other methods. The white light interference sensor is constructed based on nano positioning and nano measuring machine (NMM), the calibrated step height standard of 100±3nm is measured. The spatial frequency domain algorithm is adopted for data processing, the repetitive test result of 97.9nm and standard deviation of 0.48nm are achieved. To verify the measuring ability of complex device, the number ‘242’ on ink box is measured and three-dimensional reconstruction is conducted. The high precision and traceable measurements of micro/nano scale step height standard and complex devices are realized by the white light interference system based on NMM with steady frequency laser interferometer built-in.
A Hierarchical Control Strategy of Multi-Microgrids
Authors: Fan Li , Wei Lei , Zhao Xin Jian
Published: March 2015

This paper gives a hierarchical control strategy of multi-microgrids. The hierarchical control structure is made up with microgrid center controller (MGCC), microgrid controller (MC), generator controller (GC), load controller (LC). Controllers recognize the current operation mode of microgrids according to state trigger event and local operation state, realize transition of operation state. Controller is controlled by the upper controller, but once the communication among controllers is interrupted, MC can operate normally according to its local operation state. Thus, the MCs have a certain independence. The simulation platform is built-up by Netlogo for simulation of controller logic and communication coordination mechanism, OpenDSS for modeling distribution network and multi-microgrids, and matlab for data transmission and control optimization. With the simulation platform, this paper analyzed the characteristics of power regulation and different state transitions of multi-microgrids. Through verification, the strategy is available to realize operation state transition of multi-microgrids, guarantee stability of multi-microgrids under every operation state. Besides, compared with centralized control, it has better control effect and it has faster response.
Generic Component Based Aggregation Modelling for Reconfigurable Control
Authors: Hu He Xuan
Published: March 2015

In this paper, we propose an approach based on generic component model to realize the model aggregation for reconfigurable control. This is a component –oriented method. Two elementary notions, the service and the operating mode, are introduced to construct a hierarchical system and to assure the coherences between specification and realization at each level and between levels. The consideration of aggregated, complex components leads to extend this description to the possibilities of reconfiguration.
Application of AHP Method in Hydraulic Engineering
Authors: Li Yan Min , Li Chen Di , Zhang Li
Published: March 2015

In this paper, a water conservancy insurance tender for the study material, water conservancy project in the insurance investment risk on analytic hierarchy and the theory of stochastic risk the degree of impact of disasters on water conservancy, the main factors come to affect the insurance investment, for water conservancy insurance investment recommendations.
The Establishment of IOT Based System in Conservation and Utilization of Mogao Grottoes
Authors: Zhang Luo , Xin Yun Wei
Published: March 2015

It’s vital to protect cultural heritage Mogao Grottoes. This paper discussed the five layers structure of Mogao Grottoes risk management and decision support system, analyzed the application of some key technologies of IOT from four technical parts. This paper gave the future prospects of application of the technology of IOT on the world cultural heritage protection and it will provide a reference for the establishment of similar systems.
Order Parameters and Operation Modeling of Modularity Logistics Systems
Authors: Piao Hui Shu , Wang Jing , Chen Jin Feng
Published: March 2015

The modularity logistics system is a new concept produced in network era of globalization. The modularity logistics systems have self-organization characteristic. Combining modularity theory with synergetics theory, the association between modularity logistics systems and logistics standardization system was analyzed. And from the self-organization’s point of view, analyzing the internal and external factors of modularity logistics systems, it was identified that the standardization degree and the modularity value of logistics systems are the order parameters among the co-evolutionary of modularity logistics systems. Finally, introducing synergetics to management science, the collaborative management model of modularity logistics systems is put forward based on the public information supporting platform.
Finite Element Analysis of Large Mining Height Hydraulic Support Top Beam
Authors: Ye Tie Li , Peng Jiao
Published: March 2015

In this paper, Solid works software and finite element analysis software ANSYS workbench combined for ZY10000/26/55 type two columns shield large mining height hydraulic support top beam finite element modeling, through the mathematical model analysis to determine the mechanical load, and then using ANSYS software to analyze the stress and displacement law by three conditions: both ends of the beam in concentrated load, unilateral loads and torsional loads. In this way, we know the stress and displacement of hydraulic support beam after the distribution of load, for stress concentration, which make rationalization proposals on large mining height hydraulic support design, we recommend reinforcing ribs, increasing cover thickness or using higher strength material (Q460) and providing a reference in other measures to improve the strength and stiffness of the hydraulic support top beam.
Finite Element Analysis of the Car Steering Knuckle Based on ANSYS
Authors: Niu Xiao Yan , Wang Gui Xiang , Li Wei
Published: March 2015

Steering axle and steering knuckle arm often appear craze problem within its service life. In this paper, the structure of a car steering knuckle was investigated using finite element program at uneven road surface conditions, emergency braking condition and sideslip conditions under the condition of full load. The results show that the joint shaft neck and adjacent shoulder of steering knuckle are the easiest to be damaged. At the same time, the steering knuckle meets the strength requirement under various conditions. Secondly, use the theory of fatigue to analysis and consider parts material fatigue properties, mean stress and other factors. Steering knuckle fatigue simulations use the ANSYS software to estimate the fatigue life. Under the condition of loop 900000 times, there was no damage in steering knuckle. According to the analysis results, reduce stress concentration and the surface roughness for steering knuckle improvement measures are proposed
Research on Expanded Graphite/Nitrate High-Temperature Composite Phase Change Materials
Authors: Li Yue Feng
Published: March 2015

In order to enhance the thermal conductivity of high-temperature phase change materials (PCMs), expanded graphite (EG) /NaNO3-LiNO3 composite was prepared by the method of eutectic aqueous solution infiltration porous structure of EG. The composites with an EG amount of 10%, 20% and 30% were prepared in the similar way. The results proved that the eutectic was an excellent PCM, for its melting (solidification) temperature was 193.7 (191.7) °C, and its latent heat was 272.6(262.6) kJ/kg. With the increasing in graphite amount, the thermal conductivity of the composite was found to progressively increase with intensifications up to 10. We can conclude that the saturated water solution method was a simple and effective way to strengthen the thermal conductivity of the eutectic.
Research on Opening Holes in Cylindrical Shell Based on ANSYS Simulation
Authors: Lv Chang Zhi , Song Hong Wei , Fan Di , Song Jun
Published: March 2015

With the development of production and technology, the devices of oil refining, chemical, fertilizer and others are progressing to the direction of high parameters (high pressure, high temperature). Pressure vessels must be open, which will made the stress concentration problems more serious, and traditional design methods derived from empirically formula fails to meet the actual demand. In this paper, a theoretical result is calculated with a simplified model of the opening holes in cylindrical shell, verified by a group of solutions got by the ANSYS simulation. And it turns out that the result is rather satisfactory.
Algorithm of Transition Curve of Shaped Piston Cylindrical Cross Section
Authors: Wang Chun Yang , Zhai Peng , Zhang Hong Yang , Zhang Kun
Published: March 2015

Piston is one of important parts of engine. It is meaningful to modify piston machining. The motion characteristics of shaped-piston cylindrical surface and profile were analyzed. A fitting transition curve method for the piston skirt cylindrical profile was proposed, which could satisfy requirements of smooth and non-impact, especially at the starting point and the ending point. And the machining profile data were generated by interpolating in Matlab. This result provides references for the piston design.
A Control Strategy of Regenerative Braking System with Motor ABS for In-Wheel-Motor Vehicle
Authors: Wang Qing Nian , Song Shi Xin , Li Shao Kun , Fan Shi Qi , Peng Si Lun
Published: March 2015

The electro-mechanical braking system of In-Wheel-Motor vehicle is analyzed by applying vehicle braking stability theory. Considering the properties of composite lectro-mechanical braking system, a regenerative braking system control strategy with ABS function for In-Wheel-Motor vehicle is proposed. In the strategy, the ABS function is achieved by adjust the motor torque. With using the new strategy, simulations are conducted on an in-wheel-motor vehicle model, and the road adhesion coefficient in the simulation is 0.2 and 0.8 respectively. The result shows that the control strategy proposed enhances the braking stability of In-Wheel-Motor vehicle.
A New Approach for 3D Environment Measurement in Mobile Robot Applications
Authors: Zhao Zi Jian , Roning Juha
Published: March 2015

Here we propose a new approach for measuring the environment for the mobile robot. Without using any old framework of sensors; we utilized the latest vision system -- the spherical camera system - which consists of several cameras around a certain geometric surface. Equipped with a lift device, the spherical camera system can measure the environment around itself. We present some results of simulated and real experiments showing the validity of our method. Our approach is acceptable and exciting, and will be applied in the mobile robot’s application in the future.
The Performance of Cement-Based Self-Leveling Mortars Affected by Mineral Admixtures
Authors: Tao Wen Hong , Liu Chuang , Fu Xing Hua , Yang Zhong Liang , Zhou Wei , Zhang Tao
Published: March 2015

The paper studies the influences of mineral mixtures on the performance of self-leveling mortar through orthogonal experiments. Morphology by Scanning electron microscopy was used to examine the morphology of mortar. The experiments studied the law of strength as well as the influence by three kinds of additives (fly ash, slag and gypsum). Orthogonal experimental results show that, when the content of Fly ash, gypsum, slag were 5%, 2%, 5%, respectively they work best, and for fluidity results show that the best results were when they take up 7.5%, 2% and 10%, respectively.
Hierarchical Control Algorithm for Stability Enhancement of 4WD Electric Vehicle with In-Wheel Motors
Authors: Song Chuan Xue , Xiao Feng , Fan Shi Qi , Song Shi Xin , Wang Da
Published: March 2015

According to the characteristic that each wheel torque of 4WD electric vehicle is independent controllable, the control allocation method with hierarchical structure to optimize the distribution of motor torque can improve the handling stability of the vehicle. The controller is composed of an upper controller and a lower distributor, of which the upper controller can calculate the generalized force of longitudinal force and yaw moment that the vehicle needed based on the vehicle state, and the lower controller is used to figure out the torque allocated to each wheel. The whole vehicle and steering system models are established for simulation and demonstration through the application of Matlab and Simulink. The simulation results show that the control allocation method with hierarchical structure can effectively improve the handling stability of the vehicle.
Research on Electro-Mechanical Braking System Control of EV Based on Maximum Energy Recovery Strategy
Authors: Wang Qing Nian , Song Shi Xin , Li Shao Kun , Zhao Wei Chen , Xiao Feng
Published: March 2015

With the analysis of influence factors on regenerative braking in electro-mechanical braking system, and considering the power battery charging characteristics, a regenerative braking system control strategy for electric vehicle is researched in this paper. The models of the motor and the whole vehicle are built in AMESim. The control effects and the braking force distribution on front and rear wheels of the control strategy in an FTP-72 driving cycle are simulated and analyzed. The simulation results show that the control strategy could be utilized in the 4WD electric vehicles. The ideal braking force distribution on front and rear wheels and the high amount of recovery energy could be achieved.
An Optimization Method for Solution Selection Based on the Inverse Kinematics Problem of a Mechanical Arm
Authors: Luo Yuan Yuan , Li Dong Xu , Fan Cai Zhi
Published: March 2015

The solution selection problem of inverse kinematics for a mechanical arm is an important factor affecting the robot end effector positioning. This paper takes a real robotic arm of four degrees of freedom grasping the target object as the research background and studies the multi-solution problem of the inverse kinematics. Firstly, the paper establishes the kinematics model of the mechanical arm and solved the inverse kinematics equation by multiplying by the inverse of the coordinate transformation matrix on both sides. Secondly, the paper presents an optimization method based on joint minimization aiming at the multi-solution problem, and deals with the singularity of the mechanical arm by using the method of setting threshold in the process of operation, which can get the optimal solution without suffering singularity problems. Finally, the simulation and experiment results show that the joint angle of the mechanical arm changes smoothly during the operation process and singular points do not occur, verifying the effectiveness of the processing method.
Research on the Impact of DPF Resistance Characteristics on Diesel Performance
Authors: Yao Guang Tao , Wu Heng , Liu Hong Wei , Zhao Guo Bin
Published: March 2015

Fixing Diesel Particulate Filter (DPF) in diesel is an effective measure to solve the particulate emissions. As PM is accumulated in DPF constantly, it will increase diesel exhaust resistance and affect diesel performance. Through building the exhaust resistance test rig and diesel test bench, the thesis studies the effects of particulate matter loading in DPF on diesel exhaust resistance and diesel performance. The results show that it is the most effective to conduct silicon carbide filter’s thermal regeneration when particulate matter loading is 8g/L.
Sensor-Based Filtering of Stochastic Distributed Parameter Systems
Authors: Mu Wen Ying , Cui Bao Tong , Qi Bin
Published: March 2015

This Paper Proposes a Scheme for Filtering of Stochastic Distributed Parameter Systems. it is Assumed that a Real-Time Environment Consists of m Groups of Sensors, each of which Provides Necessarily State Spatially Measurements from Sensing Devices. Base on Lyapunov Stability Theorem and Itô formula, a Class of Distributed Adaptive Filters with Penalty Terms Result in the State Errors Forming a Stable Evolution System and Asymptotically Converge to Stochastic Distributed Parameter Systems, and then the Preferable State Estimation is Derived. Numerical Simulation Demonstrates the Effectiveness of the Proposed Method.
Synchronization of Memristor-Based Competitive Neural Networks with Different Time Scales
Authors: Duan Fei Teng , Cui Bao Tong
Published: March 2015

In this paper, a delay-independent synchronization controller is proposed for the synchronization of memristor-based competitive neural networks with different time scales. By constructing a proper Lyapunov functional, as well as employing differential inclusion theory, a delay-independent controller is designed to achieve the asymptotic synchronization of coupled competitive neural networks. A simulation example is given to show the effectiveness of the theoretical results.
Sliding Mode Control for Uncertain Markov Switched Systems
Authors: He Zhao Lan , Liu Zong Ze , Tang Xian Xian
Published: March 2015

This Paper deals with the sliding mode control of a class of uncertain Markov switched systems. By using linear transformation, the system is transformed into standard type. A sufficient condition of the existence of a sliding mode dynamics is derived, and an explicit parameterization of desired sliding surface is also given. A sliding mode controller is then designed to guarantee exponential stability of the overall switched closed-loop system. Finally, a numerical example is provided to demonstrate the effectiveness of the proposed approaches.
Dielectric Properties of Mn, Co, and Ni-Doped LaSrFeO3 Films with Different Annealing Atmosphere
Authors: Hou Yang Lu , Fu Xing Hua , Tao Wen Hong , Xue Hong Di
Published: March 2015

Mn, Co, and Ni-doped La0.5Sr0.5FeO3 thin films were prepared by the sol-gel technique with different annesling atmosphere. The structure and dielectric properties of the films were researched by XRD, SEM and Agilent. The study found that LSF-Mn (Co, Ni) films under the argon annealing atmosphere were have optimal dielectric properties. And Mn, Co, Ni elements are integrated into La0.5Sr0.5FeO3 lattices with the single perovskite phase. And uniform grain was distribution on the film surface.
A Simplified CNC System Based on PLC and Position Controller
Authors: Wang Yu Kui , Xie Qin Hai , Zhu Bo , Wang Zhen Long
Published: March 2015

In this paper, a simplified CNC system based on PLC and position controller is introduced. The position controller FX2N-20GM, is a pulse chain output unit, which can control motors to accomplish linear interpolation and circular interpolation. PLC,with the mode of FX2N-16MR, the logic control unit of system, reads position data from the position controller and determines the operation of the system. Labwindows/CVI,the configuration software on PC, is the upper monitoring system, showing the motors position in real time by monitoring PLC. The system, combined PLC , position controller and configuration software, can draw any kinds of two dimensional graphics and show the trajectory of motors on PC in real time, the linear interpolation and circular interpolation had been perfectly implemented by a series of experiments. Compared with classic CNC system, it did not contain tedious hardware wring or complex software programming, which makes the whole structure a simplified CNC system.
KNN-BF Lead-Free Piezoelectric Ceramics Synthesized by Sol-Gel Method
Authors: Cheng Guo Yuan , Fu Xing Hua , Jin Xin , Tao Wen Hong , Qiang Yu Qin
Published: March 2015

KNN-BF piezoelectric ceramics synthesized by sol-gel method in this experiment. By controlling bismuth and iron content in the system to study effects of them. We selected citric acid as metal chelator and ethylene glycol as esterification agent. PH maintained 5-6 during preparation of the sol. Sintering temperature of ceramic selected 1100°C. Preparation ceramics under these conditions and comparative analysis, the structure of ceramics is single perovskite and shap of crystals are square block. With the increase of x, properties of ceramics firstly increases and then decreases: d33, εr, Qm, Kpreaching the maximum, values of them were 136pC/N, 630(f =1KHz), 212, 0.41 respectively; dielectric loss to minimum is 0.07(f =1KHz); at this point, ceramics had best performance.
Application of SIEMENS Software Redundancy in Hazard-Free Household Disposal System
Authors: Zhang Wei , Wang Xiao Wen , Yi Hong Bo
Published: March 2015

As the improvement of environmental protection requirements, the application of Hazard-free household disposal system becomes more widely. This paper expounded the applications of Siemens S7-300 in systems, described both the characteristics of Siemens software redundancy and its design and implementation in system in detail. The system has been successfully put into production and it operates stably in Linyi.
A Novel Method for Modeling and Simulation of BLDCM Based on Modular Design
Authors: Yin Shuai , Ma Tie Hua , Zhang Yi Lei
Published: March 2015

For the imprecise and cumbersome of the brushless DC motor simulation, a novel simulation method based on modular design has been proposed. The Simulation model contains a power supply circuit, a PMSM , and a control unit which uses speed and current double-loop control mode. The outer ring of the double-loop control is speed loop with a PI control, it can stable torque and anti-load disturbance, the inner ring is current loop, with hysteresis current control, plays stable current role. Simulation results showed that the simulation method is precise and runs faster.
Implementation of DSP Based on Vector Control Model of AC Excitation Control System for a New Hybrid Excitation Synchronous Generator
Authors: Hu Jian Xin , Jia Ying , Yin Qing Hua
Published: March 2015

Permanent magnet generator has the advantages of simple structure, reliable operation and low loss, but it is not easy to adjust voltage, which restricts its wide application. This paper presents a new type of hybrid excitation synchronous generator (HESG) and establishes the mathematical model and simulation of vector control based on its AC excitation system to control the output voltage as the expectation. In application, DSP, as the control system, is traditionally programmed and debugged off-line, which requires heavy workload. Whereas, the design based on model greatly shortens the development cycle. By connecting MATLAB simulation environment to the CCS development environment, the simulation model can be translated into code and downloaded to the targeted DSP through an emulator. This implementation will have specific and indispensable significance for the hardware development and software debugging of motor control system.
The Applications of Real-Time Data Mining Technology in Fault Prediction of Power Plant Generator
Authors: Li Feng , Wang Hong Bin , Deng Dao Jun , Zhang Yan Xia
Published: March 2015

This paper mainly discusses the applications of real-time data mining technology in fault prediction of power plant generator. Massive real-time historical data of thermal power plant turbine generator equipment is stored to realize comprehensive quantitative assessment of thermal power plant turbine generator’s online security status and potential failure Early Warning. It is based on the Real-time data mining analysis and modeling techniques.
The Research on Main Circuit Parameters and its Control Law of TCR Single-Phase to Three-Phase Power Converter
Authors: Chen Shi Long , Luo Lu , Wang Yan Wu
Published: March 2015

The TCR single-phase to three-phase power converter has been widely used in electrified railway system as its simple control raw and high reliability. The research on main circuit parameters and its control law is necessary to design suitable TCR single phase to three phase power converter. This paper analyses the main circuit of TCR single phase to three phase power converter, and acquires the parameters configuration theory of each element in main circuit and control law of converter when the power factor varies from 0.7 to 0.9.
Load Identification Modeling with Improved Model Structure
Authors: Liu Shu Jun , Liu Ping
Published: March 2015

The running state of different induction motor in the load group will be moved toward two directions when it was occurred the large disturbance in the power system, one is to keep on running, another is out of step or stall. If the quantity of stall induction motor in the group is a large number, the dynamic of stall motors will effect on the stability of power system obviously. So it is necessary to develop the detailed load model to simulate the complicated dynamic characteristic of the load group. An improved synthesis load model which combines two kinds of induction motor is proposed, and the improved genetic algorithm is used to identify the parameter of load model. The case is studied to illustrate the effective and comprehensive adaptability of the proposed identification model.
Available Transmission Capacity Analysis for the Receiving-End Grid of UHV-DC Transmission System
Authors: Liu Meng , Jiang Wei Yong , Zhang Yi Wei , Min Yong
Published: March 2015

UHV-DC transmission system presents certain adverse reactive characteristics to its receiving-end grid. Based on the approach of P-V curve and V-Q curve, this paper presents a method of voltage stability analysis for the receiving-end grid of UHV-DC transmission system, which gives its available transmission capacity (ATC), voltage limit and reactive power margin, with the consideration of the normal, N-1 and N-2 operation situations and the situation of the commutation failure. Different with traditional ATC analysis, the characteristics of UHV-DC transmission system is included here. With the real UHV-DC project of ±800kV HaZheng in China, the effectiveness and efficiency of the proposed mothed are verified.
Dynamic Load Model Parameter Identification Based on Genetic Simulated Annealing Hybrid Algorithm
Authors: Liu Shu Jun , Liu Ping
Published: March 2015

Optimal algorithm is an important factor for identifying the dynamic load model parameters accurately which with the nonlinear characteristic. The paper adopts the improved genetic algorithm with optimal reservation strategy (OGA) at the beginning and finds that the problem of convergent to local optimal solution is still exist. Considering the Simulated Annealing algorithm (SA) has good performance in respect of local searching characteristic which can prevent convergence from local optimal, so the hybrid algorithm combined with SA algorithm and GA algorithm (GASA) is proposed in this paper. Case studies showed it can improve the accuracy of parameter identification and reduce the P Q fitting errors .The efficiencies of identifying substation load model based on the PMU measure data is proved as well.
Research on Fast Decoupled Load Flow Method of Power System
Authors: Zheng Wei , Yang Fang , Liu Zheng Dao
Published: March 2015

The power flow calculation is study the steady-state operation of the power system as basic electrical calculations. It is given the power system network topology, device parameters and determines system health boundary conditions, draw a detailed operating status of the power system through numerical simulation methods, such as voltage amplitude and phase angle on the bus system the power distribution and the power loss. Flow calculation is the power system operation, planning and safety, reliability analysis, is fundamental to the system voltage regulation, network reconfiguration and reactive power optimization must call the function, so the trend has very important significance to calculate the power system.
Security Mechanism of Distribution Automation System Based on ECC
Authors: Li Ai Ning , Liu Hai Bo , Wu Peng Bo , Zhang Dong Mei
Published: March 2015

Aimed at the characteristics and the security requirements of 10kV Power network distribution automation system, a set of security mechanisms is designed, which is based on Elliptic Curves Cryptography. Methods: The identity authentication between sub-station and distribution terminal unit is actualized by using ECC signature algorithm. Data integrity is actualized by Hash function and data encryption is actualized by ECC encryption schemes. Result: We develop a GUI (Graphical User Interface) as the simulation platform by using java language.
Fault Diagnosis Simulation of Light High Voltage Direct Current Transmission System
Authors: Jiang Xue Hua
Published: March 2015

High Voltage Direct Current (HVDC) system was often the link between major power grids. In order to ensure the safe operation of HVDC, fault diagnosis method was studied. The system structure of HVDC Light system was analyzed, and the normal and fault conditions of the transmission system were simulated in the Matlab platform. This method was very convenient and simple, and it could restore the real situation. The use of simulated waveform could effectively identify the fault types of actual situation, and then it was a flexible, efficient and practical method of fault diagnosis in HVDC Light system.
Study on the Performance on Some Admixture of Sulphoaluminate Cement Waterproof Mortar
Authors: Wu Bin , Tao Wen Hong , Fu Xing Hua , Wang Fu Xing
Published: March 2015

The influence of the naphthalene superplasticizer, aliphatic superplasticizer and water repellent on the properties of sulphoaluminate cement mortar such as strength and anti permeability was studied by orthogonal test method, and the microstructure of hydration products of hardened mortar was observed by X-Ray and SEM. The results showed that, adding amount of additive in sulphoaluminate cement, can improve mechanical properties of sulphoaluminate cement, and effectively improve waterproof performance and impermeability of mortar. When the water repellent admixture is 0.2%, the naphthalene superplasticizer 0.7%, aliphatic superplasticizer 1%, mortar impermeability is at its best, reaching 1.6MPa.
Voltage Sag Detection Method Based on Wavelet Information
Authors: Zhang Da Hai , Ge Cheng Yu , Chen Chen , Han Xian He
Published: March 2015

Voltage sag is the major power quality problem and receives wide attention. Although wavelet analysis works well for detecting voltage sag features, the existence of noise can reduce the advantages of wavelet method or even make it ineffective. To solve the problem, the paper uses multi-scale wavelet information by multiplying the results of several scales, and then searches the local maxima from the product to find the transition moment of voltage sag. The proposed method can suppress the noise and improve the accuracy for detecting voltage sag features. Simulation result validates the effectiveness of the proposed method.
Research of PWM Rectifier System Based on Infineon XMC4500
Authors: Yang Yin Sha , Gao Yan Xia , Luo Yuan Jie
Published: March 2015

SVPWM is widely used in power electronic transformation system for it has high voltage utilization ratio and small THD. The InfineonXMC4500 MCU is used as the control core in the lithium battery charge and discharge control system which has three-phase SVPWM rectifier/inverter circuit topology. The mathematical model of the system, the circuit structure, control strategy and software process are introduced in the paper, through the test the results verify the validity of the system.
Design of Global Positioning System Based on Single Chip Computer
Authors: Liu Li Yuan , Fan Xiu Juan
Published: March 2015

With the maturity of GPS technology and the decrease of GPS module cost, which is becoming more and more widely. This paper designed the SCT90C516 micro-computer as the control core of GPS positioning system, Consisted by GPS module, independent keys and LCD display, serial communication interface and on STC micro-computer modules. Aiming at tracking the objective in the outdoor environment. And it can be used in smart clothes, vehicle positioning and tracking to protect wild animals.
Study on a New Type of HVDC Flexible Digital Pulse Width Modulated Carrier Frequency Selection
Authors: Qin Qing Liang
Published: March 2015

For multi_level multi_module in the flexible HVDC converter (MMC) module capacitor control algorithm is commonly based on nearest voltage level modulation (NLM), this algorithm requires the decimal part of the input sine wave for analog-to-digital conversion by digital signal (digital pulse modulation, referred to as DPWM),in the choice of hysteretic DPWM control signal is better, if the input triangle carrier wave frequency selection is not good, in each digital signal level will cause the output frequency of DPWM is not stable, some DPWM frequency is too high, and some DPWM has no output. In order to solve this problem, to meet the requirements of control precision, the carrier frequency change DPWM triangular wave, the output ideal control signal, the output control signal is analyzed, put forward how to carry out DPWM frequency selection. Through the simulation certified the feasibility of this method, the control method of downloading to the field programmable gate array (FPGA) chip, the results of the actual control operation show that this method can optimize the control of flexible HVDC.
Synthesis of Lignin-Based Epoxy Resin in Ionic Liquid [BMIm]Cl
Authors: Li Wen Ting , Chen Ming Qiang , Yang Zhong Lian
Published: March 2015

Industrial alkali lignin (LG) was used as raw material and ionic liquid 1-butyl 3-methylimidazolium chloride ([BMIm]Cl) was used as solvent. Alkali lignin was dissolved into the [BMIm]Cl and modified as propyl ether lignin(HLG). Then the HLG modified lignin was used to synthesizing the lignin-based epoxy resin (LGEP) with epoxy chloropropane. The structure of LG, HLG and LGEP were characterized with FT-IR, the results indicated that the propyl group was introduced to the LG and the reaction activity was improved. The expoxy value analysis results showed that the optimum synthesis temperature was 80°C and the epoxy value was 0.218.
Study and Design of the Control System for Crop Growth Cabinet
Authors: Tian Yan Yan , Xu Yang Yang , Yu Shang Hong
Published: March 2015

The crop growth cabinet control system mainly consists of color touch screen interface operating system and control system. They communicate with each other through the RS485 module. The control system’s control core is ATmega128L single chip microcomputer, and operating system interface uses Cortex_M3 as the kernel of 32-bit processor STM32F103VC, and adopts μC/GUI to write human-machine interface which real-time monitors crop growth environmental parameters in the cabinet, and by setting various parameters to simulate the plant a variety of ecological environment.
Dynamic Modeling and Calibration of the Acceleration Sensor Based on System Identification Theory
Authors: Xu Fu Jing , Ma Tie Hua
Published: March 2015

In the process of acceleration dynamic measurement, the measurement results have quite large dynamic errors, due to the resonance of acceleration sensors. Using the system identification theory and combining with the dynamic calibration experimental data of acceleration calibration system based on Hopkinson bar, the dynamic model of the sensor is deduced, the dynamic compensation filter is designed. Simulation results show that the compensation filter can broaden the work band effectively. It improves the system dynamic response speed by nine times and advances the measuring accuracy of the test system.
A Study of 3d Coordinate Measuring Based on Binocular Stereo Vision
Authors: He Tao , Chen Jiu Yin , Hu Xiang , Wang Xian
Published: March 2015

It is important to obtain the 3d coordinate in the field of measuring. How accurate, fast, convenient to obtain the 3d coordinate affects the accuracy and reliability of measurement directly. Through studying the basic theories of machine vision this paper focus on the study of a stereo vision measurement model based on the intersecting axis. In view of the parameters in the model of binocular stereo vision, this paper uses the Zhang Zhengyou calibration method to calibrate the system of Stereo vision. In order to test the accuracy of the system, this paper measures the distance of two standard circular. Finally, the machining experiment validates the proposed method.
Headlight Detection and Error Correction of Measurement Data
Authors: Chen Pei Jiang
Published: March 2015

Headlight detection was an important item of vehicle safety testing which main detection contents included light intensity and beam irradiation direction. It was to ensure the safe operation of vehicle at night or in adverse visual conditions. The basic concepts and testing standards of headlight were introduced, and the reasons of high failure rate for headlight detection were discussed. The main error correction methods of vehicle parking position in headlight detection were compared, and their advantages and disadvantages were analyzed. An error correction system of headlight testing measurement data was designed based on machine vision, and the process of system realization was given. It could provide a method to get more accurate measurement results of automobile headlight detecting.
Study on Examination Method of Striation Marks Based on Fractal Theory
Authors: Wang Bing Cheng , Wang Zi Yan , Jing Chang
Published: March 2015

Use scissors and cutting pliers to produce some striation marks. The data collection apparatus is used to collect the surface data of such marks produced by scissors and cutting pliers, and then get the profile curve that is vertical to the surface of striation marks. In application of fractal theory, the fractal dimension of such profile curve is then calculated, and further studies are made on its fractal characteristics. As an exploration on tool types and individual identification, this is aimed to provide a new theory and approach to examination identification of striation tool marks.
An Improved l1 Tracker for Transportation Vehicle Tracking
Authors: Li Xiu Ying , Xu Rui , Zhao Cheng
Published: March 2015

Transportation vehicle tracking systems need to equip with a tracking algorithm with not only good tracking accuracy, but also fast computation speed to meet the real time changes of vehicles.l1tracker has good tracking accuracy, but the high computational complexity limits its application in real-time systems. In order to solve this problem, this paper proposed a novel algorithm that utilize compressive sensing to reduce dimensions and improved Sparsity Adaptive Matching Pursuit (SAMP) algorithm to rebuild the coefficients of templates. The experimental results show that thel1-FSAMP algorithm not only improves the running speed, but also reduces the average tracking errors by 83% compared to thel1-OMP algorithm. The results show that the proposed algorithm is suitable for practical real-time tracking of transportation vehicles.
Development of New Temperature Sensing Cable and Wireless Data Acquisition System
Authors: Qi Shu Fen , Tian Hong Tao , Liu Huan Huan
Published: March 2015

Temperature sensing cable was mainly used for simultaneous detection of multi-point temperature of the measured object. It was widely used not only in industrial areas, such as the detection of cable temperature access to facility, but also in the agricultural sector, such as the greenhouse temperature testing. Conventional temperature sensing cable was mainly linear temperature sensing switch cable, and the transmission of data was also wired, so in practical applications, this temperature sensing cable had many disadvantages. In this article, the digital temperature sensor DS18B20 manufacturing temperature sensing cable was studied and researched, ZigBee technology was used for wireless transmission, and a high efficiency, low cost, wide application of the monitoring network was established to develop a new temperature sensing cable.
The Research of Video Quality Evaluating Based on MATLAB
Authors: Chen Shan , Yao Yu Jie
Published: March 2015

Video quality impairments mainly caused by noisy transmit channel. No-Reference evaluating method is an important way to predict the video quality due to without any other loader to the transmit channel. Aiming at improve the accuracy and effectiveness of No-Reference video quality evaluating model, a novel variable-weight evaluating model is proposed. Motion intensity is introduced to qualify the variation of video content. And a weight control function is obtained based on the statistic studying method. Then the weight of clearness and smoothness can be adjusted in real time through the weight control function. The variable-weight evaluating model takes into the human perceptual properties. The experimental results show that the variable-weight evaluation model outperforms the existing evaluation models and achieves high correlation with the subjective test results.
A New Real-Time Video Watermarking Scheme Based on Mutative Area
Authors: Wang Chun Xing , Wei Yao , Liu Tong , Han Fei
Published: March 2015

A new algorithm of video watermarking based on changed area is studied in this paper. We propose a method to located area which pixels change greatly from three successive frames of uncompressed video by using three-frame differencing. Then we choose the region where changes drastically to embed watermark by using the Quantization Modulation algorithm in DCT coefficients. In order to have a good performance on video quality and embed more information, we divided the binary watermark into two parts which obtain a logistic Arnold transform before being embedded. The experimental results indicates that the proposed scheme has a good performance to frame dropping, frame cropping, frame rating, Gaussian noising, MPEG2 compression, etc. and it has a advantage on little degrading the video quality.
UV Signal Detection and Analysis of China Bank Check
Authors: Suo Shuang Fu , Jia Jun Zheng , Liu Chun Yan
Published: March 2015

This article describes the classification of China bank check, green fluorescent reaction under ultraviolet light source illumination of the featured regions—— invisible flower mission and motif pattern, and recognize the accuracy of detecting bank check feature area by signal processing and pattern recognition of UV green fluorescent response signal receiver at particular locations. It described the light filter for bank check, which is different from RMB Banknote
Approximate Merging of Two Adjacent B-Spline Surfaces Using Least Square Approximation
Authors: Lin Zi Zhi , Shu Si Hui
Published: March 2015

The approximate merging of two adjacent B-spline surfaces into a B-spline surface is the core problem in data communication. A novel algorithm is presented in this paper to solve this problem. In this algorithm, we compute the merging error using L2 norm instead of the Euclidean norm, the process of merging is minimizing the approximate error and we only need solve a system of linear equations to get the final merging surface. In order to reduce the merging error, we add a weighed function on objective function to start the next merger; this function adds greater weight on where error is larger. After the next merger, the merging error will be significantly reduced. Finally, some examples are given to demonstrate the effectiveness and validity of the proposed algorithm.